HG/T 4235-2020 Dipped polyester-cotton canvas for rubber conveyors
1 Scope
This standard specifies the product types, technical requirements, test methods, and inspection rules, as well as packaging, marking, storage and transportation of ordinary and heat-resistant dipped polyester-cotton canvases for rubber conveyors.
This standard is applicable to ordinary and heat-resistant dipped polyester-cotton canvases for rubber conveyors, and may also serve as a reference for ordinary and heat-resistant dipped polyester-cotton canvases for other rubber products.
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 9995 Determination of moisture content and moisture regain of textile - Oven-drying method
GB/T 31334.1 Test methods for dipped canvas - Part 1: Adhesion strength
GB/T 31334.4 Test methods for dipped canvas - Part 4: Hot air thermal shrinkage
GB/T 31334.5 Test methods for dipped canvas - Part 5: Tensile properties
GB/T 34235 Dipped polyester canvas technical requirements and evaluation methods
3 Product types
Dipped polyester-cotton canvases for rubber conveyors are classified into ordinary dipped-polyester cotton canvas (TC) and heat-resistant dipped polyester-cotton canvas (HTTC).
4 Technical requirements
4.1 Physical properties
4.1.1 The physical property indexes of ordinary dipped polyester-cotton canvases shall meet the requirements of Table 1.
Table 1 Physical property indexes of ordinary dipped polyester-cotton canvases
4.2 Appearance quality
The appearance quality of ordinary dipped polyester-cotton canvas and heat-resistant dipped polyester-cotton canvas for rubber conveyors shall meet the requirements of Table 3.
Table 3 Appearance quality requirements
Contents
Foreword I
1 Scope
2 Normative references
3 Product types
4 Technical requirements
5 Test methods
6 Inspection rules
7 Packaging, marking, storage and transportation
