IS 7032-1 to 8 (1986): Physical methods of test for uncut Indian jute
Contents
1. 20 4 8 1 13 25 57 1 08 30 65 1 05 35 TO 1 03 40 8 0 1 01 45 87 50 95 55 10 5 1 0 60 11 5 65 12 4 j 70 13 5 1 01 72 14 0 1 02 75 15 0 1 03 80 16 5 1 06 85 18 8 1 09 90 22 0 1 15 95 26 8 1 24 Note No correction is necessary when the relative humidity of the testing atmosphere ranges between 35 and 75 percent 26 IS 7032 Part 8 1986 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI PART 8 FINENESS First Revision 1 SCOPE 1 1 This standard Part 8 prescribes a method for determination of fine ness of jute MESTA and BIMLI fibres by air flow method 2 PRINCIPLE 2 1 A specified mass of fibres is compressed to a constant volume in a cylindrical chamber with open ends to which a flowmeter anda manometer are connected A regulated current of air is then passed through the com pressed fibres and the average fibre fineness read from the scale 3 APPARATUS 3 1 Air Flow Apparatus It shall consist of the following principal parts a Constant Volume Chamber for taking a known mass of fibres and compressing it to a fixed known volume It generally com prises 1 a plug cell into which the fibres are packed 2 a plunger which compresses the fibres and 3 a screw cap which clamps the plunger to the base b Means for Air Regulation for regulating and controlling the flow c of air through or air pressure difference across the2. Ahmedabad Textile Industry s Research Association Ahmadabad Mention of the name of a specific or proprietary instrument is not intended 4 promote or give preference to the use of this instrument over others not mentioned 29 IS 7032 Part 8 1986 1 Thermosetting laminate mounted board 11 Sample chamber 2 Levelling screws 12 cm scale 3 Reference mark for liquid 13 Denier scale 4 Reservoir for manometric liquid 14 Needle valve 5 Reservoir plug 15 Distributor 6 Aspirator bulb 16 Name plate 7 Float 17 Air pressure maintaining tube 8 Air tank 18 Check nut 9 Reference mark for total pressure 19 Perforated disc 10 Piston 20 All gradient stand 21 Air filter Fic 1 IJIRA FIBRE FINENESS TESTER 30 IS 7032 Part 8 1986 A 1 1 1 The calibrated section of the manometer is inclined horizontal gradient 1 in 5 in order to increase the sensitivity and spread out the scale A 2 OPERATING PROCEDURE A 2 1 Level the instrument with the help of the levelling screws and a spirit level A 2 2 Collect about 40 g of raw jute after proper sampling Cut the fibre to approximately I cm pieces Mix the cut fibres thoroughly and tease out by hand A 2 3 Divide the cut sample into 3 sub samples Weigh one specimen of 8 65 g from each sub sample 9A Dack th ha fm 1 7 A 2 4 Pack the weighed specimens into th chamber by piston 10 A 2 5 Squeeze the aspirator bulb 6 a number of times as
3. in ml 6 REPORT 6 1 The report shall include the following information a Type of fibre b Number of test specimens tested and c Bulk density 20 IS 7032 Part 6 1986 APPENDIX A Clause 3 1 TOP PLATE A SCALE CC FOR READING VOLUME SAMPLE TO BE KEPT BETWEEN A AND B All dimensions in centimetres Fic 1 BULK DENSITY MEASURING GADGET 21 As in the Original Standard this Page is Intentionally Left Blank IS 7032 Part 7 1986 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI PART 7 BUNDLE STRENGTH First Revision 1 SCOPE 1 1 This standard Part 7 prescribes a method for testing bundle strength of jute MESTA and BIMLI fibres by tensile testing machines working at constant rate of loading CRL constant rate of elongation CRE and constant rate of traverse CRT 2 PRINCIPLE 2 1 A bundle of fibres of 1 5 to 3 0 kilotex is gripped between two suitable clamps and their breaking load is determined on tensile testing machines Then tenacity is calculated by dividing the breaking load by the mass of the fibres held between the clamps 3 PREPARATION OF TEST SPECIMEN 3 1 Take clean portion of 200 mm in length at random from the middle region of the reeds leaving aside rooty bottom croppy end and defects Cut out sufficient length from each portion to cover fully both the clamps The mass of each portion should be approximately 30
4. rubber tube to some ex tent such that the difference in water head H between the water level in the tank and the tip of the outlet O remains constant This has been achieved by a simple device The end O of the outlet rubber tube is attached to the top opening of the receiver T hung from a spring The spring is so adjusted that the weight of liquid being drained into the recei ver is sufficient to extend the spring by an amount equal to the drop in the liquid level in the 7 The constant level difference thus maintained ensures constant rate of flow B 1 1 2 For refilling the tank 7 the receiver T is hung upside down from a hook N above the tank T into which the receiver empties itself through the same rubber tube E The tank T has two openings A and J at the top J having a tap and one outlet with a tap at the bottom The inlet tube J is connected to the regulating valve Y and the other parts of the instrument through it air is sucked in as water flows out of the tank The tap J provides an opening to the atmosphere during refilling In the receiver T also the side opening B maintains a connection between the inside and the outside atmosphere The specification of the flow system are such that a maximum flow rate of about 15 m per second can be mentioned for 25 seconds B 1 2 Flow Gauge The flow gauge I in Fig 2 is essentially a mano meter F Fz attached 10 the two ends of a glass wool plug or an equi vale
5. scale or dial for recording the load in kilograms 5 PROCEDURE 5 1 Mounting the Test Specimen Place the two clamps 50 mm apart Put the fibre bundle in one of the clamps and tightenit Straighten the fibres putting a small tension and tighten it in the other clamp If the clamps are detachable these can be taken out of the machine placed on a platform separated 50 mm apart and the fibre bundle fixed as above The clamps can then be inserted into the clamp holders on the machine The fibre bundle should be parallel to the axis of the machine 5 2 With the help of preliminary specimen set the machine so that the specimen breaks within 20 5 seconds Inthe case of constant rate of traverse type machine set it at a rate of traverse so that the time of break exceeds the inertial period of the instrument 5 3 Operate the machine and carry the test to rupture and record the break ing load of the specimen If the specimen slips in the jaws the test shall be discarded but noted and another test taken in view thereof Note Even if a test value is isolated on account of break near the jaw the value shall be noted but not taken into account in calculations If such breaks exceed 10 percent of the number of specimens tested suitable corrective action on the machine may have to be taken 5 4 With a knife or sharp razor blade cut the fibres flush at the inner edges of the two clamps and collect the tufts of fibres thus obtained Test the ot
6. specimen It shall give sufficiently fine control of air supply so that the level of the flowmeter or manometer may be quickly adjusted to the working valve Means for Producing Air Flow Capable of producing the requir ed air pressure applied to the specimen or the required pressure difference across the specimen 27 IS 7032 Part 8 1986 d Means for Measuring the Resistance of Specimento Air Flow or the Air Pressure Difference Across the Specimen The combination of manometer for maintaining the air pressure applied to the specimen and a flowmeter for indicating the rate of air flow through the specimen may be used Flowmeter or manometer shall be calibrated to directly read the fineness in tex or denier Note Two suitable instruments developed by a Ahmedabad Textile Indus try s Research Association Ahmadabad modified by Indian Jute Industries Research Association Calcutta and b Jute Technological Research Laboratories ICAR Calcutta are described in Appendices A and B 3 2 Balance capable of weighing the specimen to an accuracy of 5 mg 3 3 Device for Fibre Cutting fibre cutter or a pair of scissors 4 PREPARATION OF TEST SPECIMEN 4 1 Take a suitable portion at random from the middle regions leaving aside the rooty bottom and under retted crop ends of several reeds covering the full range of the sample Clean each portion so as to free it from barky specky and knotty spot
7. 0 to 600 mg heavier ones shall be thinned out from the side and to the lighter ones another reed or a portion of a reed shall be added Make this adjustment simply by feel Take 5 portions constituting 5 test specimens bundles 3 2 Similarly prepare at least 2 more sets of 5 specimens as in 3 1 4 APPARATUS 4 1 Testing Machine Tensile strength testing machine with a capacity of 100 kgf or a little more working on one of the following principles a Constant rate of traverse CRT b Constant rate of load CRL or c Constant rate of extension CRE 23 IS 7032 Part 7 1986 The specimens shall break within 20 5 seconds In case of constant rate of traverse machine the time of break shall exceed the inertial period of the instrument The load range of the machine shall be such that the observed values would be between 10 and 90 percent of the full scale load The permissible error in the machine at any point in this range shall not exceed 1 percent of the maximum load The machines shall be provided with the following arrangements a Two clamps with the following provisions to grip the specimens 1 Each clamp shall be such that at least 10 mm of fibre length is gripped There should be no slippage of fibres during test To prevent slippage the inside of the clamps should preferably be lined with leather or rubber padding 2 The clamps shall be capable of being adjusted on to 50 mm test length b A
8. 10002 Gr 8 September 1987 IS 7032 Parts 1 to 8 1986 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI First Revision Physical Methods of Test Sectional Committee TDC 1 Chairman Representing Dr V SUNDARAM Cotton Technological Research Laboratory ICAR Bombay Members Dr V G MuNnsHI Alternate to Dr V Sundaram AGRICULTURAL MARKETING Directorate of Marketing amp Inspection Ministry ADVISER TO THE GOVERNMENT OF of Agriculture Faridabad INDIA SHRI A T BASAK Directorate General of Supplies amp Disposals Inspection Wing New Delhi Suri D K Nanny Alternate Suri B N BAsu Office of the Jute Commissioner Calcutta Suri C BHATTACHARYA Indian Petrochemicals Corporation Ltd Vadodara Suri H C BHATIA Alternate GENERAL MANAGER OPERATIONS The National Rayon Corporation Ltd Bombay SHRI D S NADKARNI Alternate Suri R GHOSH Ministry of Defence R amp D Suri S S BAGGA Alternate Dr V G KAMATH Nirlon Synthetic Fibres amp Chemicals Ltd Bombay Dr A R MUKHERJEE Alternate SHRIMATI A KAPLESH The Silk amp Art Silk Mills Research Association Bombay Suri M R PARANJAPE Alternate Suri M K MAM Ministry of Defence DGI SHRI P C BAsu Alternate Dr B R MANJUNATHA Intexa India Bombay Dr SHRIMATI G R PHALGUMANI Textiles Committee Bombay Suri M RADHAKRISHNAN one Bomeey Textile Research Association
9. A AND BIMLI PART 6 BULK DENSITY First Revision 1 SCOPE 1 1 This standard Part 6 prescribes a method for determination of bulk density of jute MESTA and BIMLI fibres 2 PREPARATION OF TEST SPECIMEN 2 1 Take clean portions of 100mm length at random from the middle region of the reeds that is leaving aside rooty bottom croppy end and defects Adjust the sample size so that the mass of each sample is 40 g Prepare at least 3 such samples 3 APPARATUS 3 1 Metallic Plates of 100 x 25 mm with suitable arrangements for bringing them close by applying pressure in the form of dead weight An outline sketch of an apparatus suitable for this purpose is given in Appendix A 3 2 Weighing Balance 4 PROCEDURE 4 1 Take a sample as laid down in 2 1 and place it in between the two metallic plates keeping the gadget flat on the table Suspend the instrument from the handle Apply a load of 10 kg and note down the volume of the fibres from the scale of the instrument Note The samples may be tested in the prevailing atmospheric conditions However in case of dispute the sample shall be conditioned and tested in standard atmospheric conditions 4 2 Similarly test other two test specimens 19 IS 7032 Part 6 1986 5 CALCULATIONS 5 1 Calculate the bulk density by the following formula V where D bulk density M mass of fibres compressed in g and V volume of fibres under compression
10. BIMLI IS 7032 Part 1 1986 2 3 Defects a Major Entangled croppy end fibre centre root dazed and over retted fibres mossy fibre runners knots entangled sticks and hunka b Minor Croppy fibre weak croppy fibre gummy fibre loose sticks specks leaf and loose leaf 2 3 1 Centre Root BUK CHHAL The hard barky region in the middle part of the reed which requires additional softening treatment 2 3 2 Croppy Fibre Fibre with top ends rough and hard but not barky caused by careless retting 2 3 2 1 Weak croppy fibre Fibre which has become unusually weak over a length of about 30 cm at the top end 2 3 2 2 Entangled croppy end fibre Fibre with unusually entangled croppy end 2 3 3 Dazed Fibre Fibre which is weak in strength and dull in appear ance due to usually being stored in moist condition 2 3 4 Gummy Fibre Fibres held together by undissolved pectinous matter 2 3 5 Hunka The very hard barky fibre running continuously from the lower end to almost the tip of the reed 2 3 6 Knots Stiff barky spots in the body of the reed which break the continuity of the fibres when opened 2 3 7 Leaf and Loose Leaf It is the dark grey leafy or paper like sub stance remnant of the skin of the plant appearing on the strand Loose leaves are those that lie loosely on the fibre and are easily removable 2 3 8 Mossy Fibre A type of vegetation which sometimes gets attac
11. TER B 4 CALIBRATION OF THE INSTRUMENT B 4 1 Calibration of the Pressure Gauge Manometer B 4 1 1 The fibre plug chamber C is disconnected and the instrument connected to a vertically mounted U tube manometer through the leg of a T tube One end of the head piece of the T tube is connected to the U tube manometer and the other end closed air tight by means of a screw clip on a rubber tubing B 4 1 2 The water aspiration system is replaced by a suction pump which is connected to the regulating valve Y The suction pump is run on and the regulating valve Y opened slowly to obtain a steady pressure difference in the U tube manometer The two liquid columns in the U tube may be made level again by letting in air through the screw clip on the T tube 35 IS 7032 Part 8 1986 B 4 1 3 The steady pressure difference in the U tube manometer is 9 cm with a manometric liquid kerosine oil of specific gravity 0 82 The cor responding pressure gauge reading on the instrument is then marked on a scale placed beside it For subsequent readings of the flow gauge the air suction through the valve Y should be controlled so as to give this particular valve of steady pressure on the pressure gauge manometer of the mstrument B 4 2 Calibration of the Flow Gauge Manometer B 4 2 1 Take a vertically mounted rotameter a flowmeter having a rotating indicator of air flow and connect a rubber tubing at the lower end Clamp on the rubber tubing a scre
12. ade to coincide with the liquid meniscus before start ing the test Ifthe meniscus level falls below a mark some liquid may be 33 IS 7032 Part 8 1986 added into the wider limb The glass wool plug is so adjusted that the flow gauge manometer reading is changed from 0 to 26 cm with increase in flow rate from 0 to 15 ml per second B 1 3 Fibre Plug and the Chamber A plug is formed of parallel fibre bundles Such a plug is introduced longitudinally into a cylindrical cell C of 1 25 cm diameter and 5 cm length JII in Fig 2 At one end the cell has a flange which can be pressed air tight on the rubber ring over the rim of a wider chamber C by a centre open screw cap 2 B 1 3 1 The chamber is thus open to the atmosphere at the top and a small tube at the bottom connects the chamber to the manometer and the other parts of the instrument B 1 4 Pressure Gauge The pressure gauge P P IV in Fig 2 is a manometer used for registering the difference of pressure between the two ends of the fibre plug One end of the manometer as well as the fibre plug is open to the atmosphere The design of the gauge is exactly similar to that of the manometer used for the flow gauge The zero of the scale is always set at the liquid meniscus before the experiment is started B 2 FIBRE CUTTER B 2 1 For a 5 cm plug cell the fibre bundle has to be cut to 5 cm length Fibre cutter Fig 3 consists of a channel of rectangular cross s
13. d determine the average of all the values 4 REPORT 4 1 The report shall include the following information a Average reed length b Average effective reed length and c Size of the sample strands 11 As in the Original Standard this Page is Intentionally Left Blank IS 7032 Part 3 1986 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI PART 3 ROOT CONTENT First Revision 1 SCOPE 1 1 This standard Part 3 prescribes a method for the determination of root content of jute MESTA and BIMLI fibre strands 2 EQUIPMENT 2 1 The following equipment are required a Weighing balance and b A pair of scissors 3 PROCEDURE 3 1 Take a test specimen consisting of full length reeds Weigh it in a balance correct tol g W 3 2 Cut off the bottom root portion from each individual strand so that the cut fibres do not contain any root Weigh the root portion correct to 1 g W2 3 3 Repeat the test with the remaining test specimens 4 CALCULATIONS 4 1 Calculate the root content of the individual test specimens as follows W Ww x 100 4 2 Calculate the average of all the values obtained in 4 1 5 REPORT 5 1 The report shall include the following information Root content a Average root content percent and b Size of the sample strands 13 As in the Original Standard this Page is Intentionally Left Blank IS 7032 Part 4 1986 I
14. e with this standard if the final value observed or calculated is to be rounded off it shall be done in accordance with IS 2 1960 Rules for rounding off numerical values revised 3 As in the Original Standard this Page is Intentionally Left Blank IS 7032 Part 1 1986 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI PART 1 GENERAL First Revision 1 SCOPE 1 1 This standard Part 1 prescribes the definitions of terms sampling procedure and atmospheric conditions for testing of uncut Indian jute white TOSSA and DAISEE MESTA and BIMLI fibres 2 TERMINOLOGY 2 0 For the purpose of this standard the following definitions shall apply 2 1 Fibres 2 1 1 BIMLI It is a substitute for jute obtained from the bark of Hibiscus sabdarifa It is generally inferior and coarser than jute Chemi cally the fibre is different from jute in its low lignin content 2 1 2 Jute A multicellular fibre obtained from the bast of various species of Corchorus of which the round pod jute Corchorus capularis or white jute and the long pod jute Corchorus clitorius or TOSSA or DAISEE jute are the most important The fibre strands are long usually varying from 1 5 to 3 5 metres 2 1 3 MESTA It is a substitute for jute obtained from the bark of Hibiscus cannabinus It is generally inferior and coarser than jute Chemi cally the fibre is different from jute in its low lig
15. ection with a Closely fitting plunger both cut exactly to 5 cm length The fibre is placed longitudinally in the channel with ends projecting on both sides The plun ger is then pressed by a crew from the top The projecting ends of the fibres are then cut flash with the channel ends by a chisel and hammer The rota table rectangular frame through which the crew works can be turned aside when the fibre is put in the channel The plunger is provided with a pro jection not shown in Fig 3 across the length to prevent tilting B 3 OPERATION OF THE INSTRUMENT B 3 1 A group of raw jute fibre samples is cut to 5 cm length by the cutter and exactly 3 g are weighed out of it to form the test bundle This mass is found suitable for the size of the plug cell used and is also specific for a particular calibration The bundle is wrapped tightly in a paper strip and introduced into the plug cell C The paper is then taken out or torn off by pushing the bundle gently either way keeping the fibre ends flush with the cell ends The cell is then fitted air tight onto the chamber C B 3 1 1 The tank T is filled with water and the top tap J is closed With the receiver on the spring S the outlet tap O is opened The regulating valve Y is then manipulated to attain a fixed difference of pressure indicated on the pressure gauge Immediately the flow gauge reading is taken 34 IS 7032 Part 8 1986 RECTANGULAR CHANNEL Fic 3 FIBRE CUT
16. h ed to the plant Its portions may remain on the fibre even after retting and washing It can be separated by hand 2 3 9 Over Retted Fibre Fibre which has lost its strength and bright ness on decomposition due to prolonged retting 2 3 10 Runners Hard barky fibre running from the lower end to the middle region more or less continuously 2 3 11 Specks Soft barky spots in the body where fibres can be separat ed with some effort without breaking their continuity though they may remain as weak spots IS 7032 Part 1 1986 2 3 12 Sticks Entangled Sticks and Loose Sticks Sticks are remnants of woody part of jute MESTA and BIMLI plant over which fibre sheath is formed Entangled sticks are broken sticks which are linked with fibre mass and are not easily removabje Loose sticks are broken sticks easily removable by shaking 3 SAMPLING 3 1 Lot The quantity of raw jute MESTA or BIMLI of one type and quality delivered to one buyer against one despatch note shall constitute a lot 3 2 The samples for testing shall be drawn in accordance with Table 1 TABLE 1 SAMPLING OF JUTE MESTA AND BIMLI No OF BALES No or BALES TO No of MORAHS No or STRANDS IN THE LOT BE DRAWN AND TO BE DRAWN TO BE DRAWN OPENED 1 2 3 4 Up to 10 1 5 30 11 to 20 2 10 30 21 to 100 3 15 30 101 to 150 4 20 40 151 to 200 5 25 50 Above 200 aw men 50 The number of bales and MORAHS shall be so drawn as to get 50 stra
17. her test specimens in similar manner 5 4 1 Weigh the broken tufts of fibres for the 5 specimens together 5 5 Test at least 3 groups of 5 specimens each in similar manner 24 IS 7032 Part 7 1986 6 ATMOSPHERIC CONDITIONS FOR CONDITIONING AND TESTING 6 1 All the tests shall be carried out as laid down in 4 1 of IS 7032 Part 1 1986 6 1 1 In case standard atmospheric conditions are not available the samples may be conditioned and tested at the prevailing atmospheric conditions and the prevailing relative humidity shall be noted and correc tion applied for mass and breaking load as given below a Correction for mass Convert the mass of fibre bundles as obtained in 5 4 1 to equivalent mass at 65 percent relative humidity For this purpose the equilibrium moisture regain for jute corresponding to prevailing RH will require to be determined from the regain humidity curve for jute or by using a suitable moisture regain meter For example if the moisture regain at the prevailing RH is R the corrected massat 12 percent moisture regain corresponding to 65 percent RH will be given by the formula M X Cote 12 is the approximate moisture regain of jute at 65 percent relative humidity b Correction for breaking load Convert the breaking load values obtained in 5 3 for the difference in relative humidity to breaking load at 65 percent relative humidity by multiplying with the appli cable correction factor as given i
18. n Appendix A However if the relative humidity is between 35 to 75 precent the correction for breaking load value is small and may be ignored The corrected values of mass and breaking load shall be used in the formula given in 7 1 7 CALCULATION 7 1 Calculate the tenacity of the fibre by the following formula Tenacity in gjtex S OOF 4 where T sum of the breaking load values of 5 bundles of fibres in kgf and M total mass of all the bundles in milligrams 7 2 Determine the average value of tenacity S from at least 3 sets of readings Physical methods of test for uncut Indian jute MESTA and BIMLI first revision Part 1 General tThis has been obtained by multiplying length by 10 The length indicated in 4 1 a 2 is 5 cm 25 IS 7032 Part 7 1986 Note When the difference between any two values of tenacity S exceeds 15 percent of the mean another value for S should be obtained and the average of four readings shall be reported 8 REPORTS 8 1 The report shall include the following information a Type of machine b Number of test specimens tested and c Tenacity APPENDIX A Clause 6 1 1 b FACTORS FOR CORRECTING BUNDLE STRENGTH OF JUTE AT DIFFERENT RELATIVE HUMIDITIES OR MOISTURE REGAINS TO STRENGTH AT 65 PERCENT RH 12 4 PERCENT MOISTURE REGAIN Equilibrium Moisture Correction Related Humidity Regain Factor Percent Percent Multiply by 10 30 1 35 15 3 9 1 21
19. nd hard barky croppy ends have teen removed 2 2 9 Root The hard barky region at the lower end of the reed which requires additional softening treatment normally called cuttings This includes the underground root portion in case of BIMLI 2 2 10 Strength The ability of the fibres to resist strain or rupture induced by external force 2 2 10 1 The strength aspect of the fibres is classified depending upon their tenacity _ Note 1 Tenacity is the breaking load of a material under test divided by the linear density of the unstrained material expressed as grams per tex Note 2 Linear density is the mass per unit length the quotient obtained by dividing the mass of fibre or yarn by its length When the mass is expressed in grams and the length in kilometres the resulting value that is the quotient is expressed as tex Norte 3 IS 271 1975 specifies the terms very good good fairly good fair average average and weak mixed for the purpose of grading jute fibres Note 4 IS 9846 1981 specifies the terms very good good fairly good average and weak mixed for the purpose of grading MESTA fibre Note 5 IS 11596 1986 specifies the terms good fair average and weak mixed Grading of white TOSSA and DAISEE uncut Indian jute second revision Grading of uncut Indian MESTA Grading of uncut Indian
20. ndian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI PART 4 DEFECTS First Revision 1 SCOPE 1 1 This standard Part 4 prescribes a method for the determination of defects centre root crop end runners and hunka in the jute MESTA and BIMLI fibre strands 2 EQUIPMENT 2 1 The following equipment are required a Weighing balance and b A pair of scissors 3 PROCEDURES 3 1 Take a test specimen consisting of full length reeds and determine its mass to an accuracy of 1 g W 3 2 Cut the centre root and crop end portions and keep them separately Determine the mass of the centre root W and crop end W to an accuracy of 1 g 3 3 Separate out the runners from the cut fibres if any and determine its mass to an accuracy of 1 g W 3 4 Remove the hunka from the cut fibres and determine its mass correct tolg W 3 5 Repeat the test with the remaining test specimens 4 CALCULATIONS 4 1 Calculate the percentage of centre root crop end runner and hunka of the individual test specimens as follows a Centre root Py m x 100 N IS 7032 Part 4 1986 W b Crop end P Wr x 100 c Runner P x 100 d Hunka P Wa x 100 4 2 Determine the percentage of total defects by adding P Pz Pa and Py 4 3 Determine the average of all the values 5 REPORT 5 1 The report shall include the following information a Average percentage of 1 ce
21. nds 4 ATMOSPHERIC CONDITIONS FOR CONDITIONING AND TESTING 4 1 The test shall be carried out in prevailing atmospheric conditions However in case of dispute the conditioning and testing shall be carried out at standard atmospheric conditions of 65 2 percent relative humidity and 27 2 C temperature see also IS 6359 1971 Method for conditioning of textiles As in the Original Standard this Page is Intentionally Left Blank IS 7032 Part 2 1986 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI PART 2 REED LENGTH First Revision 1 SCOPE 1 1 This standard Part 2 prescribes a method for the determination of reed length of jute MESTA and BIMLI fibre strands 2 EQUIPMENT 2 1 The following equipment are required a A smooth platform or floor b Measuring tape and c A pair of scissors 3 PROCEDURE 3 1 Reed Length Lay the fibre strand on a smooth horizontal platform or floor Remove any kinks or bends with minimum tension without unduly stretching the fibre strand Measure the length of the strand from one end to the other with the help of a tape correct to 0 5 cm L 3 2 Effective Reed Length Measure the length of the root L and croppy end portion L correct to 0 5 cm Determine the effective reed length by the following formula Effective reed length L L L 3 3 Repeat the test with the remaining test specimens an
22. nin content 2 2 General Terms 2 2 1 Colour The property ofa fibre which distinguishes its appearance as creamy white grey etc IS 7032 Part 1 1986 Note 1 The colour description of white TOSSA and DAISEE jute in relation to the terms used for the purpose of grading in IS 271 1975 is given below Term Colour Description Copia a Sg Pn eee Amme ee a a ar RR White Jute TOSSA Jute DAISEE Jute Very good Light creamy to Golden to reddish Reddish white white Good Creamy pink to Reddish to brow Reddish to brownish white nish white brownish with some light grey Fairly Brownish to red Reddish or brow Brownish or good dish white with nish with some light grey some light grey light grey with some grey Fair Brownish to light Light grey to Light grey average grey copper colour Average Grey to dark Grey to dark grey Grey to dark grey grey Note 2 The colour description of MESTA fibres in relation to the terms used for the purpose of grading in IS 9846 1981 is given below Good Creamy to whitish Fair Light grey Average Greyish to dark Note 3 The colour description of BIMLI fibres in relation to the terms used for the purpose of grading in IS 11596 1986 is given below Good Creamy to whitish Average Greyish to dark 2 2 2 Density Mass per unit volume of the fibre including its air spaces The higher density is a characteristic of better quality fibre In the hand and eye method for grading
23. nt glass or brass capillary tube W in a glass tube Fora particular flow rate through the plug a difference of pressure develops between the ends Mention of the name of a specific or proprietary instrument is not intended to promote or give preference to the use of that instrument over others not mentioned 32 IS 7032 Part 8 1986 of the plug and is indicated in this manometer This manometer is calibrat ed in terms of flow rate since pressure difference is proportional to the flow rate The packing of the glass wool plug may be altered for different ranges of flow rate FLANGE C FIBRE IN CELL err trrr eed j _ I Aspirator h Tap IH Flowmeter li Inlet tube II Plug chamber J Stand IV Manometer N Hook B Side opening 0 Narrow outlet C Chamber Oz End of the rubber tube C Plug cell P Pa Pressure gauge Ca Centre open screw cap Ty Tank E Rubber tube Ta Receiver F F Manometer wW Glass wool plug H Water head Y Regulating valve FIG 2 INSTRUMENT FOR FIBRE FINENESS DETERMINATION B 1 2 1 To increase the sensitivity of the flow gauge manometer the area of limb F is made much larger than that of the other such that the depres sion in the wider limb is negligible in comparison to the elevation of the liquid in the narrow limb and further the narrow limb is kept inclined at 60 to the vertical A sliding scale is placed beside the narrow limb The zero of the scale is m
24. ntre root 2 crop end 3 runner and 4 hunka b Average total defects and c Size of the sample strands IS 7032 Part 5 1986 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI PART 5 FOREIGN MATTER First Revision 1 SCOPE 1 1 This standard Part 5 prescribes a method for the determination of foreign matter dust mud moss and stick of the jute MESTA and BIMLI fibre strands 2 EQUIPMENT 2 1 Weighing Balance 3 PROCEDURES 3 1 Take a test specimen and weigh it to an accuracy of 1 g W Beat the fibre strand against a hard surface and shake to remove dust mud and other foreign matter Continue beating until the mass becomes reasonably constant Separate out by hand the moss and sticks if any from the strand Then determine the final mass of the strand to an accuracy of 1 g W2 3 2 Repeat the test with the remaining test specimens 4 CALCULATIONS 4 1 Calculate the percentage of foreign matter of the individual test speci men as follows Foreign matter percent mos x 100 4 2 Calculate the average of all the values 5 REPORT 5 1 The report shall include the following information a Average amount of foreign matter percent and b Size of the sample strands 17 As in the Original Standard this Page is Intentionally Left Blank IS 7032 Part 6 1986 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MEST
25. of raw jute heaviness or body of the fibre is assessed This is more or less equivalent to the bulk density of the fibre 2 2 3 Fineness A measure of diameter width or mass per unit length or both of the fibre filament The finer the fibre the better is its quality 2 2 4 Foreign Matter These are dust and mud moss and stick which are mostly lost during processing and are thus subject to claims Grading of white T OSSA and DAISEE uncut Indian jute second revision Grading of uncut Indian MESTA Grading of uncut Indian BIMLI IS 7032 Part 1 1986 2 2 5 Lustre The display of different intensities of light reflected both specularly and diffusely from different parts of a surface exposed to the same incident light Due to this reflection of light the surface of textiles fibre yarn or fabric looks glossy or shining Note In case of jute fibres higher lustre is generally a characteristic of a better quality fibre 2 2 6 Natural Dust The dust which might get associated with the fibre during the process of its production 2 2 7 Parcel A consignment containing certain number of bales bundles or drums MAO N 7 m a I ee nakara Pee ekli Keeda LAN HUIC SYStCUL LOU L BIMLI plants 2 2 8 1 Reed length The length of the reed from bottom to top excluding the underground root portion in case of BIMLI 2 2 8 2 Effective reed length The length of the reed after the root a
26. ombay SHRI A V RAVINDRANATHAN Alternate Continued on page 2 Copyright 1987 BUREAU OF INDIAN STANDARDS This publication is protected under the Indian Copyright Act XIV of 1957 and reproduction in whole are in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act IS 7032 Parts 1 to 8 1986 Continued from page 1 Members Representing SHRIMATI G P RANE Wool Research Association Bombay Dr S R RANGANATHAN Indian Jute Industries Research Association Calcutta Dr U MUKHOPADRYAY Alternate SHRI M S RATHORE National Textile Corporation Limited New Delhi Suri K N SESHAN The South India Textile Research Association Coimbatore Dr G S SINGH The Raymond Woollen Mills Limited Thane SHRI J K BANERJEE Alternate SHRI C SIVARAMAN Textile India Research Bureau Bombay Suri T N SONWALKAR Central Silk Board Bangalore Dr T V K SRIVASTAVA Office of the Textile Commissioner Bombay SHRI S RAVINDRAN Alternate Sari T A SUBRAMANIAN Ahmedabad Textile Industry s Research Associa tion Ahmadabad Suri M G THANAWALA M Best Cotton Rope Manufacturing Co Bombay SHRI J N VOHRA Punjab State Hosiery and Knitwear Development Corporation Ltd Chandigarh Suri P T BANERJI Alternate Sar R I MIDEA Director General BIS Ex officio Member Director Tex Secretary Physical Method
27. oo Oo OOo Oo Oo eo Oo eo Oe k Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities in order to promote transparency and accountability in the working of every public authority and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public particularly disadvantaged communities and those engaged in the pursuit of education and knowledge the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public Sat at afar SAA aT afar Tat Bl BS AA hh AH Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru The Right to Information The Right to Live Step Out From the Old to the New Ee T to 8 1986 Physical methods of test for Unetis Indian jute Mesta and Bimli TXD 1 Physical Methods of Tests Satyanarayan Gangaram Pitroda Bhartrhari Nitisatakam A k k k k kkk kkk kkk kok BLANK PAGE PROTECTED BY COPYRIGHT IS 7032 Parts 1 to 8 1986 N Reaffirmed 2000 Indian Standard PHYSICAL METHODS OF TEST FOR UNCUT INDIAN JUTE MESTA AND BIMLI First Revision UDC 677134677142 677017 C Copyright 1987 BUREAU OF INDIAN STANDARDS MANAK BHAVAN 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 1
28. or textile fibres A 3 g bundle may be made to represent as many regions as possi ble to minimize the variation between readings 36
29. oved by the Textile Division Council 0 2 This standard consisting of nine parts Parts 1 to 9 was published between 1973 and 1976 and covered methods of test for various charac teristics of jute fibres After the publication of IS 271 1975 Grading of white TOSSA and DAISEE uncut Indian jute second revision 1S 9846 1981 Grading of uncut Indian MESTA and IS 11596 1986 Grading of uncut Indian BIMLP have been published These standards have taken into consideration the characteristics such as strength lustre colour density fineness root content and defects etc for grading of fibres These grading standards prescribe the Hand and eye method for grading and allot scores for different characteristics This standard Parts1 to 8 has been revised to make it applicable to MESTA and BIMLI fibres also The method for determination of brightness colour Part 9 has been withdrawn 0 3 This standard is aimed at obtaining instrumental measures for charac teristics of jute MESTA and BIMLI fibres for the purpose of grading To achieve this aim only those methods which are simple and could be adopted by the graders with the minimum of efforts and where scoring could be possible have been selected after survey of the work done by research institutions the published literature and also keeping in view the type of instruments available with the industry 0 4 In reporting the result of a test made in accordanc
30. s hard gummy fibres as well as other extraneous materials If necessary the cut fibre reeds shall be lightly struck against a hard surface to shake off the adherent dirt and dust Cut the fibres bundles to a specified length and take the mass of the fibres as required by the instrument used see Appendices A and B 5 PROCEDURE 5 0 Make the necessary preliminary adjustments appropriate to the instru ment used Ensure that the meniscus of the manometer is at the zero mark 5 1 Place the test specimen in the fibre compression cylinder taking care that all the fibres are placed inside Adjust the machine as recommended by the instruction manual of the instrument see Appendices A and B 5 2 Cause the air to flow through the specimen and read the air flow or the difference in pressures on the scale to an accuracy of half a division of the scale 5 3 Remove the test specimen from the fibre compression cylinder and take one or two more readings on the same specimen as recommended by the instruction manual of the instrument 5 4 Take the other test specimens and determine the test values in the man ner set out in 5 1 to 5 3 28 IS 7032 Part 8 1986 6 CALCULATIONS 6 1 Calculate the average of all the values taken for all test specimens 7 REPORT 7 1 The report shall include the following information a The instrument used b Number of test specimens and c Fibre fineness in tex or denier APPENDIX A Clau
31. s of Test for Jute Subcommittee TDC 1 3 Convener Dr U MUKHOPADHYAY Indian Jute Industries Research Association Calcutta Members Suri S K CHATTERJEE Alternate to Dr U Mukhopadhyay Suri G M BHANDARI Indian Jute Mills Association Calcutta Suri S K KARIWALA Alternate Suri A C BISWAS National Jute Manufactures Corporation Ltd Calcutta Suri A GHOSH National Test House Calcutta A DR K CHAKRAVARTY Directorate of Jute Development Ministry of Agriculture Calcutta Suri N C HALDER Alternate Suri D K DUTTA Office of the Jute Commissioner Calcutta Suri S N GHOSH Jute Technological Research Laboratories ICAR Calcutta SHRI N K S L Alternate SHRI SEKHAR GUHA Eskaps India Private Limited Calcutta SHRI B MAJUMDAR Export Inspection Council of India New Delhi Suri P K GIRI Alternate SHRI A N SANYAL The Jute Corporation of India Ltd Calcutta Dr R K SARKAR Ministry of Defence DGI Dr DEBANJAN SUR Institute of Jute Technology Calcutta Suri S C Roy Alternate IS 7032 Parts 1 to 8 1986 Indian Standard PHYSICAL METHODS OF TEST FOR TOTT TNDTA N JUTE AAROTA AND DIAAsSTT UNCUI JINDJIOAIN JUO IL Meh AINU OLIVE Lt First Revision 0 FOREWORD 0 1 This Indian Standard Parts 1 to 8 First Revision was adopted by the Indian Standards Institution on 27 June 1986 after the draft finalized by the Physical Methods of Test Sectional Committee had been appr
32. ses 3 1 4 1 and 5 1 S Nn A 1 DESCRIPTION OF THE INSTRUMENT A 1 1 A working sketch is shown in Fig 1 A rubber bulb 6 which when squeezed pumps air into a tank 8 equipped with a loosely fitting float 7 which can rise to the top of the tank As the float descends it forces air through the outlet of the apparatus If the rate of flow is sufficiently small sensibly constant air pressure can be secured for a sufficiently long interval The air outlet in the needle valve is 14 connected in series with the sample chamber 11 The cylindrical sample chamber is filled with a weighed amount of the opened sample under investigation and closed by a perforated piston 10 which compresses the plug to the same dimensions each time After passing through the plug the air escapes into the atmos phere The junction of the needle valve and the sample chamber is connect ed to the reservoir manometer 4 The measuring limb of this reservoir consists of three parts namely a first vertical section which is always filled by the manometric liquid when testing any sample within the range of the instrument an inclined section which is directly calibrated in denier and a third vertical section which serves to monitor the constancy of total pressure The entire assembly is mounted on a board provided with level ling screws Modified by Indian Jute Industries Research Association Calcutta original model for cotton developed by
33. that the float in the tank 8 rises to the top Stop squeezing and the float will start des cending Observe the position of manometer liquid At a certain point the manometer reading will remain steady for a while Note the denier reading corresponding to this position of the manometer liquid A 2 6 Remove the specimen fluff it out and repeat for a repeat test A 2 7 Repeat as in A 2 6 Altogether take 3 readings for each specimen A 2 8 Repeat the test for the other two specimens as in A 2 3 to A 2 7 A 2 9 Find the average of the 9 readings A 3 CHECKING A 3 1 In order to check from time to time that the instrument is perform ing satisfactorily readings should bet taken on the calibration sample provided 31 IS 7032 Part 8 1986 APPENDIXB Clauses 3 1 4 1 and 5 1 JTRL JUTE FIBRE FINENESS TESTER B 1 DESCRIPTION OF THE INSTRUMENT B 1 1 Air Flow Production Arrangement The aspirator Jin Fig 2 is a wide flat tank 7 of 400 cm area with a narrow outlet O of 6 mm diameter The tank is raised to suitable height 40 to 50 cm by a stand the outlet at O being extended below by a rubber tube E This provides for a hioher water head without havina to handle a lar qauantity of awe a stlpBsswe VY ObUWA LLYWEL LAZIZ T A A a aauy Liat J ew ASLLTALAWLWY ee AGL he eet ee wat we water B 1 1 1 To maintain a constant water head the top level drop has been neutralized by pulling down the end of the outlet
34. w clip to regulate air flow through the rotameter B 4 2 2 Disconnect the U tube manometer and connect the upper end of the rotameter to this point Run on the suction pump Adjust the control valve Y and the screw clip of the rubber tubing attached to the rotameter alternately so as to have different flow rates at the particular steady pressure indicated by the pressure gauge manometer of the instrument correspond ing to a pressure head of 9 cm in the U tube manometer referred to B 4 2 3 Note down the rate of air flow in the rotameter and mark this flow on the scale beside the flow gauge manometer of the instrument A number of flow rates all at the steady pressure difference are thus marked on the flow gauge scale A calibration curve is drawn relating flow rates ml s and scale length cm of the flow gauge This calibration curve is used to find out the different tex values corresponding to the different flow rates by using the formula tex 0283 x flowin ml s The flow gauge scale is then calibrated directly in terms of tex values B 5 SENSITIVITY OF THE INSTRUMENT B 5 1 Since both the pressure and the flow gauges are sensitive enough to detect a change of 1 mm in reading the approximately error of observation is not likely to exceed 2 percent when the pressure gauge stands at 18 0 cm and the flow gauge between 6 0 and 26 0 cm Considering the variation within a sample this order of sensitivity seems to be sufficient f
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