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GB 19340-2014: Adhesives for footwear and case and bag
Status: Valid GB 19340: Evolution and historical versions
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Adhesives for footwear and case and bag
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PDF similar to GB 19340-2014
Basic data | Standard ID | GB 19340-2014 (GB19340-2014) | | Description (Translated English) | Adhesives for footwear and case and bag | | Sector / Industry | National Standard | | Classification of Chinese Standard | G39 | | Classification of International Standard | 83.180 | | Word Count Estimation | 16,155 | | Date of Issue | 7/24/2014 | | Date of Implementation | 5/1/2015 | | Older Standard (superseded by this standard) | GB 19340-2003 | | Quoted Standard | GB/T 532-2008; GB/T 606-2003; GB/T 6682-2008; GB/T 7124-2008; GB/T 13354-1992; GB 18583-2008; HG/T 2198; HG/T 2815-1996; HG/T 3075; QB/T 2780-2006 | | Regulation (derived from) | National Standards Bulletin No. 19, 2014 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the performance bond adhesive for shoes and bags, harmful substances and test methods. This standard applies to shoes and bags marked with adhesive. This standard does not apply to shoes and bags while the adhesive material applica | GB 19340-2014: Adhesives for footwear and case and bag---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Adhesives for footwear and case and bag
ICS 83.180
G39
National Standards of People's Republic of China
Replacing GB 19340-2003
Shoes and bags with adhesive
Issued on. 2014-07-24
2015-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
3.4 This standard is mandatory, the rest are recommended.
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB 19340-2003 "shoes and bags with adhesive" Compared with GB 19340-2003, the main technical changes are as follows.
--- Modify the scope (see Chapter 1, Chapter 1 of the 2003 edition);
--- Modify the adhesive limit of harmful substances requirements (see 3.4,2003 Version 3.4);
--- Revised Appendix A (see Appendix A, 2003 edition Appendix A);
--- Original Appendix B and Appendix C of the original and the new Appendix B (see Appendix B, 2003 edition Appendix A and Appendix B);
--- Another Added Appendix C Recommended adhesion test material;
Added Appendix D --- Another method of measuring shoe aqueous polyurethane adhesives of total volatile organic content (VOC) were
specification.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee adhesive (SAC/TC185) centralized.
This standard was drafted. Shanghai Institute of Rubber Products, Zhejiang Academy of quality testing, Yutian Zhuhai Chemical Co., Ltd.
The main drafters of this standard. Golden Satellite, New Zhao, Li Min, Lin Huayu.
This standard replaces the standards previously issued as follows.
--- GB 19340-2003.
Shoes and bags with adhesive
Warning. This standard does not include all of the safety issues associated with the user, the user's responsibility prior to use to establish the relevant safety and health
The use of the terms and provisions established in order to meet the relevant provisions of the State (such as the concentration of harmful substances in the air of workplace, etc.).
1 Scope
This standard specifies the performance bond adhesive for shoes and bags, harmful substances and test methods.
This standard applies to shoes and bags marked with adhesive.
This standard does not apply to shoes and bags while the adhesive material application specific functional surface treatment agent.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
Determination of GB/T 532-2008 vulcanized rubber or thermoplastic rubber and fabric adhesive strength
GB/T 606-2003 Chemical Reagent Moisture common method Karl Fischer method
Laboratory use specifications and test methods GB/T 6682-2008 Analysis
GB/T 7124-2008 Determination of tensile shear strength of the adhesive (rigid material of rigid material)
GB/T 13354-1992 adhesive liquid density measurement method of weight cup
GB 18583-2008 interior decoration materials, adhesives harmful substances
General requirements for HG/T 2198 vulcanized rubber physical test method
HG/T 2815-1996 shoe adhesives heat resistance test method Creep
Provisions of HG/T 3075 adhesive product packaging, labeling, transportation and storage
QB/T 2780-2006 PU leather uppers
3 Requirements
3.1 for soles with uppers and soles of shoes with overlapping adhesive bonding properties of adhesive should meet the requirements in Table 1.
Table 1 shoes with adhesive properties of adhesive
Item Index
Tack/(N/mm) ≥ 1.0
Peel strength/(N/mm) ≥ 4.0
Heat aging resistance/(N/mm) ≥ 4.0
Shear strength/MPa ≥ 1.8
Creep/mm ≤ 15.0
These requirements relate only adhesive properties under normal conditions, wear shoes. For additional need to withstand load and (or) other external conditions
Special footwear, such as safety shoes, work shoes or sneakers, subject to the appropriate requirements and other targeted additional testing.
3.2 Selection adhesion test material
Adhesion test material and the bonding process can collaborate designated by the manufacturer and user, but not less than the adhesive properties of the corresponding items in Table 1
Index value. An adhesive which the results of a particular test with the test material can not be obtained unconditionally applied to other materials up shoes. Must
This kind of adhesive used to test the actual shoe materials, to ensure that on the table to meet the requirements. Material adhesion test of a material according to the provisions of Appendix A
Other tests may also refer to Appendix C Recommended materials.
3.3 In addition to targeting only used in the process, the peel strength of the bags with adhesive is not less than 2.0N/mm. Test material and bonding process may be made
Manufacturers and users specified.
3.4 adhesive harmful substances requirements
Shoes and bags with adhesive limit of harmful substances shall comply with the provisions of Table 2.
Table 2 shoes and bags with adhesive harmful substances
project
index
Solvent-based water-based
Benzene/(g/kg) ≤ 5.0 -
Toluene Xylene/(g/kg) ≤ 200.0 -
Free toluene diisocyanate a/(g/kg) ≤ 10.0 -
Hexane/(g/kg) ≤ 150.0 -
1,2-dichloroethane/(g/kg) ≤ 5.0 -
Total halogenated hydrocarbons (including 1,2-dichloroethane, dichloromethane,
1,1,1-trichloroethane, 1,1,2-trichloroethane ≤
50.0 -
Total Volatile Organic Compounds/(g/L) ≤ 750 100
a polyurethane adhesive to be tested in this project.
Test Method 4
4.1 Substrate and Surface treatment and sample preparation
Accordance with the procedure provided by the adhesive supplier Surface treatment and sample preparation are sticky material, without specifying methods can also be specified in Appendix A
get on.
4.2 Tack
After sample preparation time by the cool set adhesive supplier park, as no method can also be specified after sample preparation parked 2min, press
GB/T 532-2008 provisions peel test.
4.3 The peel strength
After sample preparation, at a temperature of 23 ℃ ± 2 ℃, relative humidity of 50% ± 5% parked five days, conducted according to GB/T 532-2008 requirements
Peel test.
4.4 heat aging resistance
After sample preparation, temperature of 23 ℃ ± 2 ℃, relative humidity of 50% ± 5% parked for five days and then parked at a temperature of 50 ℃ ± 2 ℃
5 days, according to GB/T 532-2008 requirements peeling test.
4.5 Shear strength
After sample preparation, according to the provisions of GB/T 7124-2008 the shear test, the sample holder separation speed of 25mm/min ±
2mm/min.
4.6 creep
Press HG/T 2815-1996 regulations. Test temperature of 50 ℃ ± 2 ℃, load weight and the hook on the total mass of 1.5kg, loading
Time 10min.
4.7 benzene content
Performed according to GB 18583-2008 Appendix B requirements.
4.8 Toluene and Xylene
Performed according to GB 18583-2008 Appendix C requirements.
4.9 free toluene diisocyanate content
Performed according to GB 18583-2008 Appendix D provisions.
4.10 hexane content
Conducted according to the standards specified in appendix B.
4.11 dichloromethane, 1,2-dichloroethane, 1,1,1-trichloroethane, and 1,1,2-trichloroethane
Conducted according to the standards specified in appendix B.
4.12 total volatile organic content
According to GB 18583-2008 provisions of Appendix F were measured where the shoe aqueous polyurethane adhesives total volatile organic content by
According to this standard Appendix D regulations.
5 Inspection Rules
5.1 Inspection classification
5.1.1 factory inspection
Shoe adhesives factory inspection items. tack, peel strength, resistance to heat aging. Visco material was provided by the manufacturer or in accordance with this standard
Motion recommends adhesive material selection and in accordance with the corresponding index value.
Bags adhesives factory inspection items. peel strength.
5.1.2 Type inspection
5.1.2.1 When one of the following conditions, type of inspection should be carried out.
A) After a year of normal production, or recipes, processes are major changes that may affect the mass;
b) shut down more than six months to restore production;
c) the national quality supervision agency or when requested by the user.
5.1.2.2 shoe adhesives type test items. harmful substances, tack, peel strength, shear strength, resistance to heat aging and creep
Sex. Visco material was provided by the manufacturer or according to the standards recommended by the adhesive material selection and in accordance with the corresponding index value.
5.1.2.3 bags adhesive type test items are. harmful substances, peel strength.
5.2 Batching and Inspection
Each tank products in one batch by batch testing.
5.3 Sampling
5.3.1 the number of samples carried out according to Table 3.
Table 3. Number of product samples
The number of containers minimum number of samples Minimum number of samples the number of containers
2 ~ 82217 ~ 3437
9 ~ 273 344 ~ 5128
28 ~ 644 513 ~ 7299
65 - 1255730 - 1000 10
126 to 21,661,000 over 11
5.3.2 Sample taken after mixing with the composition of the test sample is not less than the total amount of mixing 1kg, the test specimen was stored in a sealed container
save.
5.4 test results to determine
After the test results if an index value does not meet the requirements of this standard, the samples taken double the project failed retest, retest yet
The corresponding index value is reached, it is determined to be defective batch of adhesive.
6 signs, packaging, transportation and storage
Conducted by HG/T 3075 regulations. Shoes and bags should be marked with adhesive method involves the use of health and safety on the packaging.
7 inspection reports
Inspection report shall include the following.
a) The standard name and number;
b) adhesive name, batch number and production units;
c) sampling method;
d) Use of Instrument name and model;
e) test results;
f) anomalies arise during the inspection process;
g) testing and inspection date.
Appendix A
(Normative)
The adhesive properties of the sample preparation
A.1 Overview
This appendix provides shoes and bags measurement sample preparation method using adhesive bonding properties.
A.2 Test Materials and Surface Treatment
A.2.1 leather
Cow leather, back whichever site.
Kraft is appropriate grinding wheel to leather leather napping. Polished test piece should be thoroughly brushed dust.
A.2.2 polyurethane leatherette
PU leather should be consistent with the provisions of QB/T 2780-2006 of.
Before use with acetone or methyl ethyl ketone, or polyurethane treatment agent to wipe it again, add 70 ℃ ± 5 ℃ oven drying time is about 3min.
A.2.3 styrene-butadiene rubber sheet
Table A.1 compound formulation (parts by mass)
Styrene-butadiene rubber (SBR1502) 100.0
Zinc oxide 5.0
Stearate 1.5
Accelerant M 1.2
Accelerant DM 2.0
Accelerant TMTD 0.6
HAF 60.0
Clay 20.0
Oil (20) 10.0
Sulfur 2.0
Curing conditions. (150 ℃ ± 1 ℃) × 8min.
SBR sheet thickness. 2mm ± 0.3mm, backed with cotton canvas.
After the preparation of styrene-butadiene rubber sheet stand at room temperature 24h.
SBR sheet according to HG/T 2198 provisions polished.
A.3 Test procedure
A.3.1 Test material combinations
Test material can be leather/rubber, polyurethane leather/styrene-butadiene rubber, styrene/butadiene rubber composition.
Test material should have sufficient strength, does not affect the test results adhesive. To make the test results comparable, it is recommended to use only styrene-butadiene
Rubber/styrene-butadiene rubber combination.
A.3.2 Sample Preparation
A.3.2.1 number of samples
Number of samples of at least three, at least five samples arbitration.
A.3.2.2 sample size
First A.3.2.2.1 tack, peel strength, heat aging resistance, creep resistance specimens
Sample length 100mm ± 2mm, width 25mm ± 0.5mm, two test pieces laminated, bonded length not less than 60mm.
A.3.2.2.2 shear strength of the sample
Sample length 80mm ± 2mm, width 20mm ± 0.2mm, two sample single lap, lap length 10mm ± 0.2mm.
A.3.2.3 bonding process samples
Sample bonding process can be specified by the manufacturer and the user, if not specified, according to the following methods.
a) take appropriate adhesive (such as the need may be added a crosslinking agent), stir;
b) according to the choice of materials, the sample was sticky surface roughening (if needed rubbed surface treatment agent), placed in 70 ℃ ± 5 ℃ of oven
Drying time 2min ~ 3min;
c) the adhesive evenly brushing on two sticky material is sticky surface, the amount of adhesive is adhered to the surface is no shortage of plastic, not rubber heap prevail, the general material
Material brushing it again. For the absorbent material required in bonding the surface repeatedly brushing, brushing should be dried and then painted on a
Brush, and should indicate the number of times in the test report;
d) put in oven drying, drying temperature is 70 ℃ ± 5 ℃, drying time is 5min ~ 10min;
e) The two face each other laminated adhesive, to prevent dislocation and entrained air bubbles when laminated, and then evenly applied pressure 0.5MPa, holding 15s.
Appendix B
(Normative)
Adhesives hexane, a halogenated hydrocarbon content determined by gas chromatography
B.1 Overview
This appendix provides shoes and bags with adhesive harmful substances in n-hexane, 1,2-dichloroethane, methylene chloride, 1,1,2-trichloroethane,
Determination of chloride content.
This method is applicable in methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, trichlorethylene content in shoe boxes and 0.1g/kg or more
Determination of adhesive packages available.
B.2 Principle
Sample diluted with an appropriate solvent, directly with the sample solution diluted micro-syringe injection injector device, and a carrier gas into the color
The column is separated in the column to the corresponding components, with flame ionization detector and record the chromatograms, the sample is calculated using the external standard method
Solution content of harmful substances.
B.3 Reagents
B.3.1 dichloromethane, 1,2-dichloroethane, 1,1,2-trichloroethane, trichlorethylene were HPLC grade.
B.3.2 ethyl acetate. AR.
B.4 Instruments
B.4.1 injector. micro syringe.
B.4.2 chromatograph. with flame ionization detector.
B.4.3 Column. capillary column. Dimethylpolysiloxane as stationary phase.
NOTE. When the peaks of the other components of the measured component difficult to separate when, this time to be replaced with a different polarity columns tested under appropriate conditions.
B.4.4 recording device. integrator or chromatography workstation.
B.4.5 measurement conditions were as follows.
a) vaporization chamber temperature.200 ℃;
b) detecting room temperature. 250 ℃;
c) Nitrogen. purity of greater than 99.99%;
d) Hydrogen. purity of greater than 99.99%;
e) Air. silica gel to remove water;
f) Split. Split ratio 20.1;
g) makeup. 30mL/min;
h) in dichloromethane thermostat. 80 ℃;
i) 1,2- dichloroethane, 1,1,2-trichloroethane, trichlorethylene temperature program. The initial temperature of 35 ℃, holding time of 25min, warming
Rate 8 ℃/min, end temperature 150 ℃, holding time 10min.
B.5 analysis step
Weigh 0.2g ~ 0.3g (accurate to 0.1mg) of the sample, placed in 50mL volumetric flask, dissolved in ethyl acetate and diluted to the mark
Degree, shake. Using micro-injection syringe take 1μL, measure the peak area. Table B.1 If the peak maximum concentration is greater than the peak area of the sample solution
Area, with a sample solution pipette Pipette accurately V volume in 50mL volumetric flask, diluted with ethyl acetate, shaken after the test.
B.6 preparation of standard solution
B.6.1 standard solution. 10mg/mL
Weigh about 1g accurate to 0.0001g of n-hexane, 1,2-dichloroethane, methylene chloride, 1,1,2-trichloroethane and trichlorethylene,
They were placed in 100mL volumetric flask, diluted with ethyl acetate to the mark.
B.6.2 standard solution. 500μg/mL
They were taken an appropriate volume of hexane, 1,2-dichloroethane, methylene chloride, 1,1,2-trichloroethane, and trichlorethylene solution (B.6.1.), Placed in
A 100mL volumetric flask, diluted with ethyl acetate, shake that was two n-hexane, 1,2-dichloroethane, methylene chloride, 1,1,2
Trichloroethane and trichlorethylene was 500μg/mL of the standard solution.
Configuration B.6.3 series of standard solutions
By volume listed in Table B.1 standard solution (B.6.2), and were placed in six 25mL volumetric flask, dilute to the mark with ethyl acetate
Degree, shake.
Volume Table B.1 and the corresponding concentration of the standard solutions
Pipette volume /
mL
Hexane quality
Concentration/(μg/mL)
By mass of 1,2-dichloroethane
Concentration/(μg/mL)
Quality dichloromethane
Concentration/(μg/mL)
1,1,2-trichloroethane quality
The amount of concentration/(μg/mL)
Quality Trichloroethylene
Concentration/(μg/mL)
25.00 500.0 500.0 500.0 500.0 500.0
10.00 200.0 200.0 200.0 200.0 200.0
5.00 100.0 100.0 100.0 100.0 100.0
2.50 50.0 50.0 50.0 50.0 50.0
1.00 20.0 20.0 20.0 20.0 20.0
10.0 10.0 10.0 10.0 10.0 0.50
Determination B.6.4 series of standard solution peak area
Turn gas chromatograph, the chromatographic conditions are set, until a stable baseline, using micro-syringe take 2.0μg standard solution injection,
Determination of the peak area of each standard solution was injected 5 times the mean value.
B.6.5 Draw standard curve
A peak area for the vertical axis, the corresponding standard solution concentration (μg/mL) as abscissa, that was the standard curve.
B.7 Expression of results
Read directly from the standard curve or the regression equation to calculate the concentration of the analytes in the sample solution.
Sample content ω component to be measured according to formula (B.1) Calculated.
ω = ρt
· V · f
1000m
(B.1)
Where.
ω --- sample analytes content in grams per kilogram (g/kg);
Ρt --- concentration of analytes in the sample solution, in micrograms per milliliter (μg/mL);
The V --- volume of the sample solution, in milliliters (mL of);
M --- the quality of the sample, in grams (g);
F --- dilution of the sample solution.
Appendix C
(Informative)
Recommended adhesion test material
C.1 Recommended adhesion test material
Adhesion test material and the bonding process can be carried out in accordance with Appendix A, may also be specified by the user and the manufacturer. We recommend the following test materials.
a) recommended test material leather 1. chrome-tanned leather noodle;
b) recommended test material leather 2. sole leather, vegetable tanning;
c) recommended test materials SBR1. styrene-butadiene rubber, Shore A hardness of 95;
d) recommended test materials SBR2. styrene-butadiene rubber, Shore A hardness of 70;
e) recommended test material NBR. nitrile rubber, Shore A hardness of 80;
f) recommended test materials SBSR. thermoplastic rubber, Shore A hardness of 60;
g) recommended test material PVC. soft PVC, Shore A hardness of 70.
Note. The performance tests recommended above materials testing and ensuring the supplier. Shore A hardness characteristics as given only when necessary to distinguish the various
material.
C.2 material combinations
Recommended test material prepared by the following combination of materials with a sample.
Leather 1/SBR1
Leather 1/2 Leather
SBR1/SBR1
SBR2/SBR2
NBR/NBR
SBSR/SBSR
PVC/PVC
Leather 1/SBR1 sample used to determine the surface layer of the adhesive for most materials --- leather footwear industry with the adhesive properties.
Used to determine when the use of more than 1 leather body strength adhesive recommended test material leather 2, SBR1, SBR2, NBR,
SBSR Recommended test specimens and PVC material two identical.
Leather can be 1/SBR1 sample (such as polychloroprene adhesives) or leather 1/PVC sample (such as polyurethane adhesive) to creep
Variable peel test (50 ℃ ± 2 ℃).
Appendix D
(Normative)
Shoes aqueous polyurethane adhesives of total volatile organic content (VOC) measurement method
D.1 Overview
This method is applicable to the determination of water-based polyurethane adhesive shoes total volatile organic content.
D.2 Principle
An appropriate amount of adhesive is placed in a constant temperature oven blast, within a specified period of time, measured adhesive total volatiles content. Card
Seoul Fischer method wherein the determination of moisture. Adhesives total volatiles content of deduction where the amount of water, calculated total volatile adhesive
Organic content.
D.3 equipment and materials
D.3.1 Instruments
D.3.1.1 electronic balance. accurate to 0.1mg.
D.3.1.2 Karl Fischer moisture meter (volumetric method).
D.3.1.3 Blast Oven. The temperature can be controlled at 105 ℃ ± 2 ℃.
D.3.1.4 Pap de pipette.
D.3.1.5 surface of the dish.
D.3.1.6 dryer.
D.3.1.7 constant temperature water bath.
D.3.1.8 weight cup. 20 ℃ under capacity 37.00mL metal cup.
D.3.2 Materials
D.3.2.1 experimental water
In line with GB/T 6682-2008 in three water specifications.
D.3.2.2 4A Zeolite
Burning 2h at 500 ℃ ± 50 ℃ high temperature furnace, a desiccator (no desiccant) to cool to room temperature.
D.3.2.3 anhydrous methanol
AR. Water mass fraction of more than 0.05%, dehydrated with molecular sieves 4A, molecular sieve proportion of 0.1g per ml of solvent plus
The placing dehydration more than 24h.
D.3.2.4 dimethylformamide
AR. Water mass fraction of more than 0.05%, dehydrated with molecular sieves 4A, molecular sieve proportion of 0.1g per ml of solvent plus
The placing dehydration more than 24h.
D.3.2.5 Karl Fischer reagents. free of pyridine.
D.4 Test procedure
D.4.1 Determination of total volatiles
D.4.1.1 Weigh constant weight dish drying surface at a test temperature, weighed sample is placed in the adhesive surface of the dish, to the nearest 0.001g, place
± 2 ℃ in blast temperature of 105 ℃ heating and drying temperature drying chamber 180min ± 5min.
D.4.1.2 sample was taken out and put it into the dryer to cool to room temperature, call quality, accurate to 0.001g.
D.4.1.3 total volatiles content w of the total according to equation (D.1) Calculated.
w Total =
m1-m2
m1
(D.1)
Where.
w --- total sample mass fraction of total volatiles,%;
M1 --- samples were dried before mass, in grams (g);
After m2 --- dried sample mass, in grams (g).
D.4.2 Determination of Moisture
D.4.2.1 Karl Fischer reagent titre calibration steps are as follows.
a) methanol and dimethyl formamide added in a volume of the cuvette (volume ratio of about 1.1, immersed platinum electrode), first with the Karl Fisher
Hugh reagent blank titration to the end to ensure that the cuvette solvent does not contain water.
b) weighed amount of water added to the reaction cup, the input water quality m3, with Karl Fischer reagent titration to the end point, the water consumption records titration
Consumption Karl Fischer reagent volume number V1, parallel determination of at least 3 times the mean value. Titer by the formula (D.2) Calculated.
F =
m3
V1
(D.2)
Where.
F --- titer, in milligrams per milliliter (mg/mL);
m3 --- quality of water was added, in milligrams (mg);
V1 --- titration of water consumed by the Karl Fischer reagent volume in milliliters (mL).
D.4.2.2 bar formula with Germany pipette certain adhesive samples, record the total mass Pap de pipette samples and adhesives, precision
To 0.1mg.
D.4.2.3 The adhesive sample 5.2.2 Barco de pipette formula within the drip 1-2 drops in the cuvette, calculated using the difference between the amount added to the reaction drop method
m4 quality adhesive sample cup. In Karl-quality adhesive sample moisture analyzer input Hugh added.
D.4.2.4 Open stirring until the adhesive sample was dissolved in the reaction solution, starting with Karl Fischer reagent titration until the end alarm recording titration
Adhesive sample consumption of Karl Fischer reagent volume number V2.
D.4.2.5 sample moisture content according to equation (D.3) Calculated.
w = water
V2
m4 ×
F (D.3)
Where.
w --- water sample moisture content,%;
Karl Fisher titration V2 --- adhesives sample consumed off the amount of reagent, in milliliters (mL);
m4 --- added the quality of the sample, in milligrams (mg);
F --- titer, in milligrams per milliliter (mg/mL).
Parallel D.4.2.6 Each sample was measured three times, seeking moisture arithmetic mean, the arithmetic mean of the water used is substituted into the formula (D.4), calculate the total play
Made organic compounds (VOC) content.
twenty one
Density Determination D.5
The method according to GB/T 13354-1992 provisions were.
The results are shown D...
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