GB/T 19089-2012Rubber-or plastics-coated fabrics -- Determination of abrasion resistance -- Martindale method (English PDF)

4.2.1 (see 4.2);

-- Remove the sampling requirements in 5.1.2 of the 2003 edition, and move the

content to 5.1.1 (see 5.1.1);

-- Add the sample requirements in 5.2.2 and 5.2.3 (see 5.2.2 and 5.2.3);

-- Move the second paragraph of 7.2.5 in the 2003 edition to after Table 4 in

Chapter 8 (see Chapter 8);

-- Remove Appendix A of the 2003 edition;

-- Add Bibliography.

This Standard adopts ISO 5470-2.2003 Rubber- or plastics-coated fabrics -

Determination of abrasion resistance - Part 2.Martindale abrader by means of

translation.

This Standard makes the following editorial changes.

-- The standard name remains the same as the 2003 edition, instead of using the

international standard name;

-- Since ISO 12947-2.1998, ISO 12947-3.1998, and ISO 12947-4.1998 cited in

Chapter 2 are non-normative references, they are listed in the Bibliography

and replaced with their corresponding Chinese standards;

-- Remove the word "minimum" from "minimum mass per unit area" in Table 1

because the representation is incorrect.

4.1 Abrasion machine

The abrasion machine shall have one or more test benches, each equipped with the

components specified in 4.1.1 ~ 4.1.6.

4.1.1 Circular sample holder with an annular sample clamp that clamps the sample

along its edge, exposing a raised, flat circular portion with an area of (645±5) mm2.

4.1.2 Horizontal grinding table, large enough to form a square central test area with a

side length of 88 mm. The grinding table is usually circular, with a minimum diameter

of 125 mm.

4.1.3 A device that keeps the raised, flat circular part of the sample holder (4.1.1) in

contact with the grinding table (4.1.2) while allowing the sample holder to rotate freely

within the plane of the grinding table.

4.1.4 A device that generates relative motion between the sample holder (4.1.1) and the

grinding table (4.1.2), forming a Lissajous figure with an area of (60±1) mm × (60±1)

mm (see Figure 1). Each Lissajous figure requires 16 elliptical movements (revolutions)

of the sample holder, and the operating speed of the testing machine shall be (48±4)

r/min.

In each Lissajous figure, the parallelism between the circular sample holder (4.1.1) and

the grinding table (4.1.2) shall be maintained within ±0.05 mm. The micrometer

mounted on a circular sample holder can be used to verify the parallelism of the

grinding table.

The circumferential parallelism of the sample holder (4.1.1) in contact with the grinding

table shall be better than ±0.05 mm. This can be verified by inserting a guide gauge

with a thickness of less than 0.05 mm into the edge of the flat surface of the grinding

head.

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