GB/T 19390-2023 PDF EnglishUS$350.00 · In stock · Download in 9 seconds
GB/T 19390-2023: Dipped polyester cord fabric for tyres Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 19390: Historical versions
Similar standardsGB/T 19390-2023: Dipped polyester cord fabric for tyres---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT19390-2023GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 59.100.99 CCS G 41 Replacing GB/T 19390-2014 Dipped polyester cord fabric for tyres Issued on. MARCH 17, 2023 Implemented on. OCTOBER 01, 2023 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Product classification and specifications... 6 5 Technical requirements... 7 6 Test conditions, regulations on product batching and specimen preparation methods ... 11 7 Test methods for physical and chemical properties... 12 8 Inspection methods for tissue specifications and appearance quality... 25 9 Inspection rules... 25 10 Packaging, marking, quality guarantee, transportation and storage... 26 Annex A (informative) Tensile performance test method -- CRT tensile testing machine method... 29 Annex B (informative) Schematic diagram of pneumatic grips for tensile testing machine... 311 ScopeThis document specifies product classification and specifications, technical requirements, test conditions, regulations on product batching and specimen preparation methods, physical and chemical properties test methods, tissue specifications and appearance quality inspection methods, inspection rules as well as packaging, marking, quality guarantee, transportation and storage FOR dipped polyester cord fabric for tyres. This document is applicable to the identification and acceptance of the quality of dipped polyester cord fabric for tyres.2 Normative referencesThe 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 2942-2009, Rubber, vulcanized - Determination of static adhesion to textile cord - H-pull test GB/T 3291 (all parts), Textiles - Terms of textile material properties and test GB/T 4666-2009, Textiles - Fabrics - Determination of width and length GB/T 4668-1995, Textiles - Woven fabrics - Determination of number of threads per unit length3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in GB/T 3291 (all parts) as well as the followings apply. 3.1 H-test adhesive strength The force required to pull the cord from the H-shaped rubber-cord test piece in the direction perpendicular to the rubber block per unit length. 3.2 dip pick-up The dipping component of the dipped cord is separated from the white cord by chemical method and dried to a constant weight. The ratio of the constant mass of the impregnated substance to the constant mass of the blank cord shall be the dip pick-up. 3.5 warp density within specified width from each edge The number of warp threads within a certain length from both sides of the cord fabric to the cloth edge. 3.6 net weight The mass of dipped cord fabric obtained by subtracting the mass of all packaging materials from the mass of the cord fabric roll when leaving the dipping machine.4 Product classification and specifications4.1 According to physical and chemical properties, dipped polyester cord fabrics are divided into high-modulus low-shrinkage (HMLS), high-strength high-modulus low- shrinkage (HTHMLS) and high-dimensionally-stable high-modulus low-shrinkage (HDS-HMLS). 4.3 Each specification of dipped polyester cord fabric can be divided into various specifications according to the warp density. Commonly used dipped polyester cord fabric has 15 specifications, see Table 1.5 Technical requirements5.1 Physical and chemical properties 5.2 Appearance indicators 5.2.1 The appearance quality of dipped polyester cord fabric is evaluated in units of rolls. The length of each roll of dipped polyester cord fabric is calculated as 1080 m.6 Test conditions, regulations on product batching and specimenpreparation methods 6.1 Test conditions 6.2 Regulations on product batching and specimen preparation methods 6.2.1 Take several roll cord fabrics produced from the same warp bobbin as a batch of goods. However, if they are produced by different processes or are not continuously Cord specifications 6.2.3 From 20 cm away from the edge of the test cloth, uniformly extract cords with a length of 500 mm ~ 600 mm from 6 positions equidistant from each other. Remove the weft. After mixing, it is used as the specimen of this batch of dipped polyester cord fabric. 6.2.4 In the event of disputes between the supplier and the buyer over the test results, the test results jointly accepted by randomly selected specimens shall prevail.7 Test methods for physical and chemical properties7.1 Tensile property test 7.1.1 Principle Under the specified conditions, clamp the cord specimen between the two clamps of the CRE electronic tensile testing machine. Stretch the specimen to fracture at the specified tensile speed. Determine the breaking strength, constant load elongation and breaking elongation of the specimen directly from the strength-elongation curve or data display. 7.1.2 Test instruments This document recommends using CRE tensile testing machine. See Annex A when using a CRT tensile testing machine. In case of any dispute over the tensile test results, the test results of the CRE tensile testing machine shall prevail. 7.1.3 Number of specimens It shall be ensured that the number of effective specimens is 20. 7.1.4 Test conditions Distance between the jaws of the upper and lower fixtures. (250±1) mm. Tensile speed. (300±5) mm/min. 7.1.5 Operating procedures 7.1.6 Calculation Use a testing machine that is not equipped with an automatic test data processing device. From the stress-strain curve of the specimen, read and record the breaking strength, breaking elongation and constant load elongation of each specimen. 7.2 H-test adhesive strength test According to the provisions of GB/T 2942-2009.The test conditions therein are as follows. 7.3 Dip pick-up test 7.3.1 Principle Because the mixed solvent in 7.3.4.1 can only dissolve polyester fiber, but not rubber compound, separate the dipped film on the dipped cord with a measured constant mass from the blank cord. Measure the constant mass of the dipped film. The ratio of the constant mass to the constant mass of the blank cord shall be the dip pick-up of the dipped cord. 7.3.5 Calculation Use formula (4) to respectively calculate the dip pick-up of two specimens. Use the arithmetic mean to represent the dip pick-up of each batch of cords. The value of the calculation result shall be rounded to one digit after the decimal point according to GB/T 8170. 7.4 Hot air thermal shrinkage test 7.4.1 Test method of hot air thermal shrinker 7.4.1.3 Number of specimens It shall be ensured that the number of effective specimens is 5. 7.4.1.4 Test conditions Temperature. (177±2)℃. Heat treatment time. 2 min. 7.7.6 Precautions 7.7.6.1 The calculation result shall indicate the off-machine moisture regain or moisture regain after unpacking. 7.7.6.2 In order to prevent the moisture regain of the specimen from changing during the test, the operator shall wear cotton gauze gloves on both hands. Place the specimen in a dry, airtight container. Weigh it as soon as possible.8 Inspection methods for tissue specifications and appearance quality8.1 Inspection method for tissue specifications 8.1.1 Inspection method for cloth roll length It is carried out in the way of metering on-line in the dipping production line (manufacturer) or calendering production line (user). The unit is m. The value of the inspection result shall be rounded to an integer according to GB/T 8170. 8.1.4 Inspection method for weft thread density According to the provisions on the single piece method in GB/T 14343-2008.The unit is dtex. The value of the inspection result shall be rounded to an integer according to GB/T 8170.9 Inspection rules9.1 The physical and chemical properties indicators are sampling inspections. The sampling methods shall be carried out according to the regulations in 6.2.1 and 6.2.2. 9.2 Appearance indicators are all inspections. The inspection items in Table 6 are all assessment items. Carry out inspection according to the inspection method specified in 8.2.If there is one item failure, the product shall be rejected. 9.3 The buyer can inspect the product provided by the manufacturer according to the provisions of this Standard within 12 months after the product is dipped. If the inspection is not carried out within the time limit, it is deemed that the buyer has approved the inspection results indicated in the quality guarantee issued by the seller. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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