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QB/T 1472-2013Flexing index of fiberous board for footwear (English PDF)

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Issued by

Ministry of Industry and Information Technology of the People's Republic of China

Level / Type

National · Recommended

Issue date

December 31, 2013

Implementation date

July 1, 2014

Scope

QB/T 1472-2013 (Flexing index of fiberous board for footwear) is available as an English-translated PDF.

QB/T 1472-2013 — This Standard specifies the terms and definitions, requirements, test methods, result representation, inspection rules and judgments, and test reports for the flexing index of fibrous board for footwear.

This Standard is applicable to the insole fiberboard of shoes for daily wear. It is not applicable to semi sole and insole fiberboard with special requirements.

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Document preview — QB/T 1472-2013

National Standard of the People's Republic of China

ICS: 61.060

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Foreword...3
1 Scope...4
2 Normative references...4
3 Terms and definitions...4
4 Requirements...4
5 Test methods...5
6 Result representation...6
7 Inspection rules and judgement...7
8 Test report...7

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard is a revision of QB/T 1472-1992 "Flexing index of shoe fiber-board".

Compared with QB/T 1472-1992, the main changes are as follows.

- The terms and definitions for flexibility index are added;

- Only qualified products and superior products are required in the requirements, and

the requirement for first-class product indicators is deleted;

- The rules for determining product quality are added;

- Some editorial modifications are made.

This Standard was proposed by China National Light Industry Council.

This Standard shall be under the jurisdiction of National Technical Committee on

Shoemaking of Standardization Administration of China (SAC/TC 305).

The drafting organizations of this Standard. China Leather and Footwear Industry

Research Institute, Wenzhou Liyu Shoe Material Co., Ltd., Guangdong Huakai Special

Fiberboard Technology Co., Ltd., and Maqilong Shoe Material (Hangzhou) Co., Ltd.

Main drafters of this Standard. Yan Hongwei, Ye Dingwei, Long Jianyou, Zhu Tong.

This Standard was first published in 1992.This is the first revision.

Flexing index of fibrous board for footwear

1 Scope

This Standard specifies the terms and definitions, requirements, test methods, result

representation, inspection rules and judgments, and test reports for the flexing index of

fibrous board for footwear.

This Standard is applicable to the insole fiberboard of shoes for daily wear. It is not

applicable to semi sole and insole fiberboard with special requirements.

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 2703, Footwear -- Vocabulary

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in GB/T 2703 as

well as the followings apply.

3.1 flexing index

The logarithm of the number of bending times when the shoe fiberboard specimen

fractures during the experiment.

4 Requirements

The longitudinal and transverse flexural indices of various shoe insole fiberboards

should meet the requirements in Table 1.

5 Test methods

5.1 Test principle

The shoe fiberboard is repeatedly mechanically flexed until it breaks Calculate the

flexural index based on the number of times it buckles at the time of fracture.

5.2 Specimens

5.2.1 Ambient conditioning

Place in an environment with a temperature of (23 ± 2)°C and a relative humidity of

(65 ± 5)% for 48 h.

5.2.2 Specimen preparation

Cut two sets of specimens (3 each) with a length of (80 ± 1) mm and a width of (10 ±

0.2) mm from the conditioned specimen. The long side of the first set of specimens is

parallel to the machining direction of the fiberboard for footwear (referred to as the

transverse direction). The long side of the second set of specimens is perpendicular to

the machining direction of the fiberboard for footwear (referred to as the longitudinal

direction).

5.3 Test device

5.3.1 The gripper consists of an upper gripper and a lower gripper (including the load),

as shown in Figure 1.The flexion angle of the upper gripper is (90 ± 1)° for both sides,

with a flexion frequency of (60 ± 10) times/min (one flexion for each side is considered

one flexion). The mass of the lower gripper (including the load) is (2 ± 0.01) kg. Vertical

movement is restricted below the flexion point of the specimen.

5.3.2 The counter can record the number of flexions when each specimen breaks. The

test stops when all the test strips break.

5.4 Test conditions

The test is carried out under the environmental conditions of (23 ± 2)°C and a relative

humidity of (65 ± 5)%.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 2703Footwear -- Vocabulary

Cited by

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