Dipped polyester cord fabric for tyres
1 Scope
This document specifies the product classification and specifications, technical requirements, test conditions, product batching rules and specimen preparation methods, test methods for physical and chemical properties, methods for inspecting organization specification and appearance quality and inspection rules, as well as packaging, marking, quality guarantee, transport and storage of dipped polyester cord fabric for tyres.
This document is applicable to the quality appraisal and acceptance of dipped polyester cord fabric for tyres.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions 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 textiles 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 length
GB/T 6529-2008 Textiles - Standard atmospheres for conditioning and testing
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 14343-2008 Testing method for linear density of man-made filament yarns
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 3291 (all parts) and the following apply.
3.1
H-test adhesive strength
force required to pull a unit length of cord from an H-shaped rubber cord test piece in the direction perpendicular to the rubber block
3.2
dip pick-up
ratio of the constant mass of the dipped material to that of the blank cord after separating the dipped component of the dipped cord from the blank cord via chemical methods and drying it to a constant mass
3.3
elongation at specified load
strain of cord at specified load
3.4
hot air thermal shrinkage
ratio of the length reduction of cord due to the action of dry and hot air at a certain temperature to the original length
3.5
warp density within specified width from each edge
number of warps on both sides of the fabric within specified length from each edge of the cord fabric
3.6
net weight
weight of dipped cord fabric obtained by deducting the weight of all packaging materials from the weight of cord fabric roll when the roll leaves the dipping machine
3.7
dimensional stability index
sum of elongation at specified load and hot air thermal shrinkage
3.8
linear density of the dipped cord
absolute dry mass of a certain length of dipped cord
4 Product classification and specifications
4.1 Dipped polyester cord fabric may be divided into those with high modulus and low shrinkage (HMLS), with high tenacity, high modulus and low shrinkage (HT-HMLS), and with high dimensional stability, high modulus and low shrinkage (HDS-HMLS) by their physical and chemical properties.
Contents
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification and specifications
5 Technical requirements
6 Test conditions, product batching rules and specimen preparation methods
7 Test methods for physical and chemical properties
8 Inspection method for organization specification
9 Inspection rules
10 Packaging, marking, quality guarantee, transport and storage
Annex A (Informative) Method for testing tensile properties - CRT tensile testing machine method
Annex B (Informative) Schematic diagram for pneumatic fixture of tensile testing machine
轮胎用聚酯浸胶帘子布
1 范围
本文件规定了轮胎用聚酯浸胶帘子布的产品分类及规格、技术要求、试验条件、产品分批规定及试样制备方法、理化性能试验方法、组织规格和外观品质检验方法、检验规则及包装、标志、品质保证书、运输和贮存。
本文件适用于轮胎用聚酯浸胶帘子布品质的鉴定和验收。
2 规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
GB/T 2942-2009 硫化橡胶与纤维帘线静态合强度的测定 H抽出法
GB/T 3291(所有部分) 纺织 纺织材料性能和试验术语
GB/T 4666-2009 纺织品 织物长度和幅宽的测定
GB/T 4668-1995 机织物密度的测定
GB/T 6529-2008 织品 调湿和试验用标准大气
GB/T 8170 数值修约规则与极限数值的表示和判定
GB/T 14343-2008 化学纤维 长丝线密度试验方法
3 术语和定义
GB/T 3291(所有部分界定的以及下列语和定适用于文件。
3.1
H-抽出粘合强度H-test adhesive strength
帘线从 H 形橡胶-帘线试片中沿与橡胶块直方向拉出单位长度所需的力。
3.2
附胶量 dip pick-up
将浸胶帘线的浸胶组分物质与白坯帘线通过化学方法分离并烘干至恒质量,浸胶物质恒质量与白坯帘线恒质量之比。
3.3
定负荷伸长率 elongation at specified load
帘线在给定负荷下的应变。
3.4
干热收缩率 hot air thermal shrinkage
帘线因受一定温度干热空气的作用而产生的长度减量与原长度之比。
3.5
边部经线密度 warp density within specified width from each edge
帘子布经向两侧距布边一定长度内经线的根数。
3.6
净质量 net weight
离开浸胶机时帘子布布卷质量扣除所有包装物质量所得的浸胶帘子布质量
3.7
尺寸稳定性指数 dimensional stability index
定负荷伸长率与干热收缩率的和。
3.8
漫胶帘线线密度 linear density of the dipped cord
一定长度的浸胶帘线绝干质量。
4 产品分类及规格
4.1 聚酯浸胶帘子布根据理化性能分为高量低收型(HMLS)、高强力高模量低收缩型(HT-HMLS)和高尺寸稳定性高模量低收缩型(HDS-HMLS)。
