GB/T 10006-2021Plastics - Film and sheeting - Determination of the coefficients of friction (English PDF)

Foreword

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

This Standard replaces GB/T 10006-1988 "Plastics - Film and sheeting -

Determination of the coefficients of friction". Compared with GB/T 10006-1988,

the main technical changes are as follows.

- Modify the scope (see clause 1; clause 1 of the 1988 edition);

- Modify the normative references (see clause 2; clause 2 of the 1988 edition);

- Modify the terms and definitions (see clause 3; clause 3 of the 1988 edition);

- Add the note "The coefficient of friction of films usually ranges between 0.2

and 1" (see note 1 to 3.4.2);

- Modify the principle (see clause 4; clause 4 of the 1988 edition);

- Add the test device requirement that "Either the sled or the test table can

be used as the moving part"; modify figure 1; delete figure 2 (see 5.1 and

figure 1; 5.1, figure 1, and figure 2 of the 1988 edition);

- Modify the naming, order of subclauses, and structure of the "Test

apparatus" (see clause 5; clause 5 of the 1988 edition);

- Add the test speed setting requirement of "500 mm/min+/-10 mm/min" (see

5.2.3);

- Add the requirement for checking the transition time when using the force-

measuring system of a tensile tester (see 5.2.4);

- Modify "Directly connect the sled and the load cell" to "The spring shall be

replaced by a rigid connection" (see 5.2.5; 5.6 of the 1988 edition);

- Add the overshoot requirement for the coefficient of friction (see the note to

5.2.5);

- Modify specimen requirements (see clause 6; clause 7 of the 1988 edition);

- Modify the conditioning (see clause 7; clause 8 of the 1988 edition);

- Add the general rules of test procedure (see 8.1);

- Modify the test procedure of "Film against film" and "Film in contact with

metal or another material" (see 8.2 and 8.3; 9.1 and 9.2 of the 1988 edition);

- Modify the calculation of results of static coefficient of friction and dynamic

coefficient of friction (see 9.1 and 9.2; 10.1 and 10.2 of the 1988 edition);

- Delete the requirement of "Significant figures for result calculation" (see

48 on Plastic Products of Standardization Administration of China (SAC/TC 48).

Drafting organizations of this Standard. Beijing Technology and Business

University, Yunnan Hongta Plastic Co., Ltd., Shantou S.E.Z. Xiongwei Plastic

Packing Co., Ltd., Guangdong Tianan New Material Co., Ltd., FSPG Hi-

tech Co., Ltd., Shanghai Royal New Materials Technology Co., Ltd., Institute of

Plastics Processing & Application of Light Industry, China National Centre for

Quality Supervision & Test of Plastics Products (Beijing), Kunshan Access

Testing Technology Services Co., Ltd., Labthink Instruments Co., Ltd.

Main drafters of this Standard. Xu Bo, Wang Lei, Hu Jinmei, Bei Nan, Wu

Qichao, Liang Meiying, Wei Liming, Li Tianhua, Chen Xin, Zou Jianfeng.

The previous edition of the standard replaced by this Standard was released as

follows.

- GB/T 10006-1988.

Plastics - Film and sheeting -

Determination of the coefficients of friction

1 Scope

This Standard specifies a method for determining the coefficients of starting

and sliding friction of plastic film and sheeting when sliding over itself or other

substances.

2 Normative references

The following documents are indispensable for the application of this document.

For the dated references, only the editions with the dates indicated are

applicable to this document. For the undated references, the latest edition

(including all the amendments) are applicable to this document.

3 Terms and definitions

For the purposes of this Standard, the following terms and definitions apply.

The force acting perpendicular to the surfaces in contact.

4 Principle

The surfaces to be tested are placed together in plane contact and under

uniform contact pressure. The force needed to displace the surfaces relative to

each other is recorded.

5 Test apparatus

Figure 1 shows an example of apparatus in which the table is moved

horizontally for the determination of the coefficients of friction.

6 Test specimens

For each measurement, two test specimens measuring about 80 mmx200 mm

are needed. Three such pairs of test specimens taken from points uniformly

distributed over the width of the sample, or the circumference in the case of

tubular film, shall be tested.

7 Conditioning

Unless otherwise specified, film specimens shall be conditioned for at least 16

h in standard atmosphere 23/50 as defined in ISO 291 prior to testing. The test

shall be carried out in the same environment.

8 Test procedure

If the frictional behaviour of a film in contact with the surface of another material

is to be determined, the specimen of the material is fixed on the horizontal test

table. Otherwise, the same procedure as 8.2 shall be used.

The coefficients of friction determined in this way are dependent on the type of

material as well as on its surface finish.

9 Calculation of results

The frictional force acting during the sliding motion often differs from the value

which would exist in an ideal situation due to secondary effects related to

increasing path length.

10 Precision

The dispersion of the coefficients of friction of several plastics has been

investigated in a preliminary inter-laboratory trial intended, first and foremost,

to assess an alternative test speed, and also to provide preliminary precision

data (see annex A).

11 Test port

The test report shall include the following particulars.

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