GB/T 4802.1-2008Textiles - Determination of fabric propensity for fuzzing and pilling - Part 1: Circular locus method (English PDF)

Foreword

GB/T 4802 "Textiles - Determination of fabric propensity to surface fuzzing and to pilling" is divided into four parts.

- Part 1: Circular locus method;

- Part 2: Modified Martindale method;

- Part 3: Pilling box method;

- Part 4: Random rolling method.

This Part is part 1 of GB/T 4802.

This Part replaces GB/T 4802.1-1997 "Textiles - Assessing the rate of pilling of fabrics - Circular locus method". The main differences of this Part with GB/T 4802.1-1997 are as follows.

- Standard name is revised as "Textiles - Determination of fabric propensity to surface fuzzing and to pilling - Part 1: Circular locus method";

- The applicable fabrics are not specified in Scope;

- Revise and supplement the terms and definitions in Chapter 3;

- Specify the specific requirements of grade-assessment box and explain them in diagram;

- Add provisions of specimen pretreatment;

- Change the corresponding fabric types of each kind of test conditions into the applicable fabrics AND make examples; and supplement is made at the same time;

- Add the state description of specimen propensity to surface fuzzing and to pilling; and change grade-assessment methods from comparison specimen for grade-assessment into the grade-assessment according to visual description;

- Revise the methods for grade-assessment and expression of results. Annex A of this Part is informative.

1 Scope

This Part of GB/T 4802 specifies methods for determination of fabric propensity to surface fuzzing, to pilling and superficial alteration in circular locus method.

2 Normative References

The following standards contain the provisions which, through reference in this Part of GB/T 4802, constitute the provisions of this Part. For dated reference, the subsequent amendments (excluding correction) or revisions of these publications do not apply.

However, the parties who enter into an agreement according to this Part are encouraged to study whether the latest editions of these references are applicable.

For undated references, the latest edition of the normative document is applicable to this Part.

GB/T 6529 Standard atmospheres for textiles conditioning and testing (GB/T 6529-2008, ISO 139:2005, MOD)

3 Terms and Definitions

The following terms and definitions are applicable to this Part of GB/T 4802.

4 Principle

According to the specified method and test parameters, adopt nylon brush and fabric abradant or just use fabric abradant to rub specimen to fuzzing and pilling.

5 Apparatus

5.3 The mass area ratio of poly-foam gasket is about 270g/m², its thickness is about 8mm; the diameter of the gasket of specimen is about 105mm.

6 Atmosphere for Conditioning and Testing

Atmosphere for conditioning and testing shall adopt the specified standard atmosphere in GB/T 6529.

7 Specimen Preparation

8 Test Procedures

8.1 Before the test, the apparatus shall be maintained to be horizontal and nylon brush shall be clean; adequate solvent (such as dimethyl ketone) may be used for clearing the brush.

8.2 Install respectively the poly-foam gasket, specimen and abradant for fabric on the test clip and whet bench; specimen shall be with the front face outwards.

8.3 Select test parameters for conducting an experiment according to the fabric types specified in Table 1.

8.4 Take down the specimen and prepare for grade-assessment; pay attention not to make test surface of any external influence.

9 Assessment of Fuzzing and Pilling

Grade-assessment box shall be placed in dark room.

Place a piece of already-tested specimen and a piece of untested specimen side by side in the middle of the specimen board in grade-assessment box, along fabric's longitudinal direction; if required, proper method may be adopted to fix them at appropriate position; the already tested specimen shall be placed in left while the untested specimen shall be placed in right.

10 Result

Record the grade of each piece of specimen; the grade-assessment result of a single person is the average value to all the specimens.

11 Test Report

The test report shall cover the following contents.. […]