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GB/T 30311-2013Test method for tensile properties of dipped aramid yarns and cords (English PDF)

浸胶芳纶纱线、线绳和帘线拉伸性能的试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2013

Implementation date

September 1, 2014

Scope

GB/T 30311-2013 is the English-translated version of 浸胶芳纶纱线、线绳和帘线拉伸性能的试验方法.

GB/T 30311-2013 is the Chinese standard "Test method for tensile properties of dipped aramid yarns and cords".

Its scope clause reads: This standard specifies the use of rubber products dipped aramid yarn, rope and cord breaking strength, breaking elongation, constant elongation load, constant load Standard Test Method for Performance of elongation, breaking strength coefficient of variation coefficient of variation of elongation at break, tensile modulus of elasticity.

This standard applies to dipped aramid yarn, cord and the cord stretched detection performance. Its clauses include test principle; equipment and instruments.

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Document preview — GB/T 30311-2013

National Standard of the People's Republic of China

ICS
83.140.99
Classification
G 47

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Contents

  • 1 Scope
  • 2 Normative references
  • 3 Test principle
  • 4 equipment and instruments

1 Scope

This standard specifies the use of rubber products dipped aramid yarn, rope and cord breaking strength, breaking elongation, constant elongation load, constant load

Standard Test Method for Performance of elongation, breaking strength coefficient of variation coefficient of variation of elongation at break, tensile modulus of elasticity.

This standard applies to dipped aramid yarn, cord and the cord stretched detection performance.

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.

GB/T 6529 Textiles Standard conditioning and testing atmosphere

GB/T 8170 repair value expressed about the rules and limit values and judgment

3 Test principle

Under specified test conditions, the balance after dipping aramid yarn, rope and cord samples, held in a fixed constant elongation (CRE)

The type tensile testing machine at a constant rate tensile force pulling the sample until the sample breaks. Read directly from the tensile testing machine or calculated

Obtain samples for tensile strength, elongation at a given load, constant load elongation, elongation, breaking strength coefficient of variation, variation in elongation at break

Coefficient, elastic modulus tensile properties data.

4 equipment and instruments

4.1 tensile testing machine

Use constant elongation (CRE) type tensile testing machine, the test machine should be configured with a self-recording logger or can automatically calculate and display the Badge

Quasi-data needed, and should meet the following requirements.

a) to record breaking strength and elongation values and draw strength - elongation curve;

Test error b) strength values <=1%;

c) test error elongation value <=0.1mm;

d) error holding gauge length value <=1mm;

e) holding the specimen holder should be stable, and to ensure that during the test, the sample lower clamp clip inside slip does not occur, and the clip

Holding force will not produce damage to the specimen;

f) tensile testing machine should be equipped with extensometer.

4.2 tensile testing machine fixture

4.2.1

This standard specifies test should be used in arc jig, the sample was wound between the clip plane, then to partially (corners) around

Wire wrapped around the clip groove on the other end of the sample in the same manner on the other winding fixture; jig clamped sample should not slip or the sample

Fracture damage.

4.2.2

holder holding mode using pneumatic or hydraulic way.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

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