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GB/T 33389-2016 English PDF (GBT33389-2016)

GB/T 33389-2016 English PDF (GBT33389-2016)

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GB/T 33389-2016: Woven fabrics and woven composite fabrics for automotive interior

This Standard specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of woven fabrics and woven composite fabrics for automotive interior. This Standard applies to woven fabrics and woven composite fabrics that are mainly made of textile fiber raw materials and processed by woven technology, for automotive interiors such as automobile seats and door panels.
GB/T 33389-2016
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 59.080.30
W 59
Woven fabrics and woven
composite fabrics for automotive interior
ISSUED ON: DECEMBER 30, 2016
IMPLEMENTED ON: JULY 01, 2017
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Technical requirements and quality assessment ... 6
5 Test methods ... 7
6 Inspection rules ... 11
7 Packaging, marking, transportation and storage ... 12
Annex A (normative) Constant load elongation and residual deformation rate ... 13
Annex B (normative) Schopper abrasion resistance ... 15
Annex C (normative) Organic compounds volatilization test ... 17
Woven fabrics and woven
composite fabrics for automotive interior
1 Scope
This Standard specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of woven fabrics and woven composite fabrics for automotive interior.
This Standard applies to woven fabrics and woven composite fabrics that are mainly made of textile fiber raw materials and processed by woven technology, for automotive interiors such as automobile seats and door panels.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in colour
GB/T 2912.2-2009 Textiles - Determination of formaldehyde - Part 2:
Released formaldehyde (vapour absorption)
GB/T 3820 Determination of thickness of textiles and textile products
GB/T 3917.3 Textiles - Tear properties of fabrics - Part 3: Determination of tear force of trapezoid-shaped test specimens
GB/T 3920 Textiles - Tests for colour fastness - Colour fastness to rubbing GB/T 3923.1 Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the strip method
GB/T 4666 Textiles - Fabrics - Determination of width and length
GB/T 4669-2008 Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area
GB/T 4745 Textiles - Testing and evaluation for water resistance - Spray test method
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB 8410 Flammability of automotive interior materials
GB/T 13773.1 Textiles - Seam tensile properties of fabrics and made-up
textile articles - Part 1: Determination of maximum force to seam rupture using the strip method
GB/T 14801 Test method for skewness and bow in woven and knitted fabrics GB/T 16991-2008 Textiles - Test for colour fastness - Colour fastness and ageing to artificial light at high temperatures: Xenon arc
GB 18186-2000 Fermented soy sauce
GB/T 19977 Textiles - Oil repellency - Hydrocarbon resistance test
GB/T 21196.2 Textiles - Determination of the abrasion resistance of fabrics by the Martindale method - Part 2: Determination of specimen breakdown
FZ/T 01118 Textiles - Testing and evaluation for anti-soil properties - Soil release
FZ/T 01128 Textiles - Determination of abrasion resistance - Double-head method
FZ/T 60045-2014 Textile trim materials in the interior of automobiles - Test method for fogging characteristics
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply. 3.1
woven laminated fabrics for automotive interior
Composite fabrics of two or more layers, made by bonding the woven fabrics to urethane foams or knitted fabrics, nonwoven fabrics, etc., used for
automotive interiors.
at least 24 h.
Two sets of specimens are taken from the fabric to be tested, in which one set is warp specimens and one set is weft specimens. Each set of specimens
contains three pieces of specimens. It shall avoid wrinkles and defects. The specimen shall be at least 150 mm away from the edge of the cloth. It shall ensure that the specimens are evenly distributed on the sample. Each
specimen has a size of 200 mm ?? 50 mm. Along the length of the specimen, manually peel it off at least 40 mm, and respectively clamp them on the upper and lower clamps of the CRE tensile testing machine. The spacing of the upper and lower clamps is set to 50 mm. The specimen is stretched to complete separation at the test speed of 100 mm/min. Record the curve. The 1/4 portion of each of the front and back of the graph is removed, and the average value of the peaks of the middle 1/2 portion is taken. The test result is expressed as the arithmetic mean of the three specimens. The data is rounded off according to the method of GB/T 8170, and the calculation result retains one decimal place.
5.1.8 Abrasion resistance
5.1.8.1 Martindale method
Carry out according to GB/T 21196.2. The total mass of loading block and specimen clamp assembly is (795 ?? 7) g. During the abrasion test, the nominal pressure applied to the specimen is 12 kPa, and the test end is the specified number of abrasions. Number of abrasions: 20000 times for the main material of seats, 35000 times for seat accessories, 15000 times for door panels. After the test is completed, the change in color of the abrasion area of the specimen is evaluated according to GB/T 250, and the appearance change of the surface of the specimen is recorded.
5.1.8.2 Taber abrasion resistance
Carry out according to FZ/T 01128, with CS-10 abrasion wheel, 500 g of load, 1000 times of abrasion. Evaluate the damage of the specimen.
5.1.8.3 Shawl abrasion resistance
Carry out according to Annex B. 1000 times for seat fabrics and 500 times for door panel fabrics.
5.1.9 Color fastness to rubbing
Carry out according to GB/T 3920.
5.1.10 Color fastness to light
Carry out according to GB/T 16991-2008, with exposure for three cycles. The exposure is carried out according to Condition 3 in 6.1, and the spectral irradiance at 420 nm is selected to be 1.2 W/(m2 ?? nm).
5.1.11 Combustion properties
Carry out according to GB 8410.
5.1.12 Formaldehyde content
Carry out according to GB/T 2912.2. It takes 2 g of sample. The formaldehyde calibration solution shall be at least 5 concentrations according to the method of 6.2.2 in GB/T 2912.2-2009. The following two concentrations are added: 0 mL S2 to 500 mL, containing 0 ??g of formaldehyde/mL = 0 mg of
formaldehyde/kg of fabrics;
0.5 mL S2 to 500 mL containing 0.075 ??g of formaldehyde/mL = 3.75 mg of formaldehyde/kg of fabrics.
5.1.13 Fogging characteristics
Carry out according to 8.2 ?€?Mass method?€? in FZ/T 60045-2014.
5.1.14 Smell
Take three specimens and place each of them in a 1 L sealed can. The sealed cans shall be odorless at room temperature and 80 ??C, and shall have a cover that is easy to open. It shall keep the sealed cans clean during the test. Dry in an oven at (80 ?? 2) ??C for 2 h. After drying, cool to (60 ?? 5) ?? C for rating. When the thickness of the specimen is less than 3 mm, the sampling size is (200 ?? 20) cm2; when the thickness is greater than 3 mm and less than 20 mm, the sampling size is (50 ?? 5) cm3. The thickness of the specimen cannot exceed 20 mm. If the thickness of the specimen exceeds 20 mm, the specimen is cut down to 20 mm thick along the using face. When smelling, the tester shall put the head close to the can (about 15 cm), remove the cover, and then fan by hand to guide the air from the sealed can to the nose and slowly inhale. The cover shall not leave the sealed can for more than 5 s. At least 3 testers are required to perform the test. If the results differ by more than 2 grades (including 2 grades), retest and add 2 personnel for test. According to the grades of Table 3, the appropriate grade is recorded. If it is between the two grades, it can be determined as half-grade, and the average value is used as the test result. The test shall be carried out in a free environment that keeps the smell
uncontaminated.
The evaluators shall be subject to special training and have no olfactory defects. People who smokes, using fragrance cosmetics, have colds, etc. are not
quality, otherwise it is unqualified.
6.3.2 Determination of appearance quality
Each sample of the batch is evaluated for the appearance quality according to 4.2. Those meeting the requirements of 4.2 are determined qualified for the appearance quality, otherwise it is unqualified. If the number of unqualified samples of the appearance quality does not exceed the accepted quantity Ac of Table 4, the appearance quality of this batch of products is qualified. If the number of unqualified samples reaches the rejected quantity Re of Table 4, the appearance quality of this batch of products is unqualified.
6.3.3 Result determination
If it is determined qualified according to 6.3.1 and 6.3.2, this batch of products is qualified.
7 Packaging, marking, transportation and storage
7.1 The marking contains at least the following:
a) product name;
b) main product specifications (according to contract or agreement
requirements, such as width);
c) implemented Standard number;
d) inspectors;
e) manufacturer;
f) date of manufacture;
g) product trademark.
7.2 Packaging methods and materials used are based on the principle of
sturdiness and suitable for transportation, to ensure that their quality is not affected. Plastic films or braid belts are used as the outer packaging. 7.3 It is forbidden to damage the packaging during transportation. It shall pay attention to anti-soil and moisture-proof. Fabrics with soft nap shall be prevented from pressure.
7.4 Fabrics shall be stored in a dry, clean, ventilated warehouse.
Annex A
(normative)
Constant load elongation and residual deformation rate
A.1 Test equipment
A.1.1 Constant load elongation frame (with clamps, weights), or electronic strength machine that meets the test requirements.
A.1.2 Steel ruler or tape measure, accurate to 1 mm.
A.2 Test procedure
A.2.1 Sample preparation
Take at least three specimens along the warp and weft directions. The length of the specimens is at least 160 mm, the width of the specimens is 55 mm or more. The width of the specimen is made to (50 + 1) mm by splitting edge yarns. The specimens shall be conditioned and tested according to GB/T 6529. Before the test, the specimens shall be conditioned for at least 24 h.
A.2.2 Constant load elongation
Draw two marking lines in the middle of the longitudinal direction of the specimen so that the distance between the marking lines is 100 mm (L0). After clamping for 30 minutes under a certain load, measure the length (L1) between the two marking lines. Calculate the constant load elongation according to the formula (A.1).
A.2.3 Residual deformation rate
After the constant load elongation test, remove the load on the specimen. Then, after 30 minutes, measure the length (L2) between the two marking lines. Calculate the residual deformation rate according to the formula (A.2). A.3 Result representation
Constant load elongation
Residual deformation rate
Annex C
(normative)
Organic compounds volatilization test
C.1 Principle
The residual volatile organic compounds in the sample are extracted with a headspace sample injector and determined by gas chromatography-hydrogen flame ionization detector (GC/FID), based on the total amount of carbon. C.2 Test equipment and chemical reagents
C.2.1 Gas chromatograph: with split-splitless-inlet and flame ionization detector (FID).
C.2.2 Headspace sample injection bottle.
C.2.3 Capillary separation column: with inner diameter of 0.25 mm, film thickness of 0.25 ??m, length of 30 m, 100 % polyethylene glycol stationary phase (Wax-type, such as DB-Wax, Carbowax).
C.2.4 Electronic balance: with accuracy of 0.1 mg.
C.2.5 Microliter syringe: with accuracy of 5 ??L.
C.2.6 Chemical reagents:
a) Acetone: HPLC grade;
b) n-butanol: HPLC grade;
c) 2,6-Di-tert-butyl-4-methylphenol (BHT): analytical grade.
C.3 Test procedure
C.3.1 Parameters of headspace sample injector
C.3.1.1 Temperature: 120 ??C for heating furnace, 150 ??C for quantitative tube, 180 ??C for transfer tube.
C.3.1.2 Time: 19 s for continuous rise of pressure, 16 s for of gas discharge, 5 s for sample injection.
C.3.1.3 Pressure: 124.80 kPa (18.1 psi or 1.25 bar) for load pressure, 159.96 kPa (23.2 psi or 1.60 bar) for bottle pressure.
column shall be adjusted to the maximum temperature once a week and
maintain for 15 min.
C.3.5 Calibration
C.3.5.1 Plot a calibration curve, to quantify the total amount of carbon volatilized and the amount of various specific substances. Acetone is used as the
calibration material for total carbon volatilization.
C.3.5.2 After the installation of the new separation column and after the instrument has been modified, the basic calibration shall be carried out with 7 concentrations. In addition, at least 3 concentrations shall be used for controlled calibration at monthly.
C.3.5.3 When carrying out the basic calibration of acetone, it shall prepare n- butanol solutions at a concentration of 0.1 g/L, 0.5 g/L, 1 g/L, 5 g/L, 10 g/L, 50 g/L, 100 g/L as calibration samples. When carrying out the controlled calibration, it shall prepare the solutions of at least three concentrations, i.e. 0.5 g/L, 5 g/L, 50 g/L; before calibration, it must ensure the n-butanol used has no peak appears at the same time with that of acetone.
C.3.5.4 In addition, all substances used for calibration shall meet at least the annual quality requirements.
C.3.5.5 In the calibration measurement, use a 5 ??L syringe to take 2 ??L of solution from a 10 mL glass container and inject into an empty, airtight headspace sample injection bottle. It shall be noted that there shall be no air bubbles in the syringe.
C.3.5.6 The calibration sample is subjected to constant temperature treatment at 120 ??C for 1 h, and analyzed according to the test specifications. After the solvent is diluted, the gas chromatograph?€?s temperature chart is interrupted. At least 3 measurements are taken for each calibration solution.
C.3.5.7 Draw a line of the acetone peak area versus the corrected sample concentration, the slope of which indicates the calibration coefficient K [K(G) represents the total carbon volatilization amount, and K(i) represents the individual material emission amount].
C.4 Result representation
C.4.1 Recording of data
The data recorded in the gas chromatograph must include the total peak area and the peak area of the individual material given in the drawing:
a) it only needs to consider the peak when calculating the total peak area;

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