Analysis Of Test Method For Abrasion Resistance Of Automotive Leather معدات اختبار

Product Introduction

A very important application of leather textiles is in the field of car interiors. With the rapid development of the automobile industry, the inspection of various performance of automobiles in the industry is becoming more and more strict. For example, the abrasion resistance test of automotive leather is an example. The standard prescribes that the abrasion resistance of leather for car seats and steering wheels must meet:

According to Shanghai Qianshi, the test methods for abrasion resistance of car leather mainly include Taber Grinding Method, Martindale Abrasion Method and STROLL abrasion method.

Taber Grinding Method:

American Standard ASTM D 3884-2009 on TABER Grinding method is determined and the test instrument is a taber abrasion tester.

Test principle:

The sample to be tested is placed on a roterunning platform placed, and the two rolling frictions above The wheel performs a rotational friction movement with the sample under a certain load to carry the sample. One friction wheel faces outward and the other friction wheel faces inward to rub the sample and form a circular wear mark. After the specified number of rubs, the degree of wear of the sample is assessed by appearance.

Operating Process:

Mount the sample face up on the rotating platform and install the selected grinding wheel on the support bar. After selecting the correct load, lower the support bar so that the grinding wheel comes into contact with the sample surface, connect and switch on the dust extraction device. Start the instrument and run the test according to the number of revolutions set by the counter. After the test, remove the sample, check and record the sWear the sample and use the gray sample card according to GB/T 250-2008 "Textile color fastness test - Gray sample card for evaluating discoloration".

Martindale abrasion method:

Martindale abrasion method is often used for the abrasion resistance test and pilling evaluation of textiles , the Martindale Abrasion Tester is the best testing tool. GB/T3903.16-2008 "Abrasion Resistance of Footwear Uppers, Linings and Inner Pads" stipulates that Martindale De Del method is a test method for testing shoe uppers, and it is also suitable for testing the abrasion resistance of automotive leather.

Using the Martindale abrasion method, the sample was rubbed under constant pressure against a standard rubbing tissue. The relative motion of the Lissajous figure between the friction fabric and the specimen causes friction. Evaluate the extent of damage to the sample after completing the prescribed number of rubsingen.

During use, place a piece of polyurethane foam with a thickness of (3 ± 1) mm and a density of (30 ± 3) kg / m3 on the back of the sample and clamp it. The ring fixes the sample on the grinding head, and then puts the table felt on the grinding table, then puts the friction fabric on the table felt, and puts a weight that generates (2 ± 0.2) kPa pressure on the friction fabric, and then fixes the friction fabric . Finally, install the grinding head on the wear-resisting testing machine, apply a pressure of (12 ± 0.2) kPa to the grinding head, start the instrument, and run the test according to the number of revolutions set by the counter. After testing, remove the sample, check and record the wear of the sample, and use the gray sample card to evaluate the color change in the test area in accordance with GB/T 250-2008 "Textile Color Fastness Test - Gray Sample Card to Assess Discoloration".

STROLL wear-resistantte method:

The principle of STROLL wear-resistant method is to test the sample Placplaced on an inflated rubber diaphragm with constant air pressure, the preparation is rubbed with sandpaper with a special surface. After the specified number of rubs, the degree of wear of the sample is assessed by appearance.

According to the standard:

ASTM D3886-1999

Operation steps:

Place the sample on the rubber film in the flat state, then put the sandpaper on the sanding plate, and make the contact head connected with the sandpaper flat with the surface of the sandpaper together . Then apply an air pressure of 28 kPa below the diaphragm and 454 g above the sanding plate, and make sure that the air pressure control and the contact between the aerated sample and the loaded sandpaper are in a stable and balanced state. Start the instrument and run the test as followsns the number of revolutions set by the counter. After testing, remove the sample, check and record the wear of the sample, and use the gray sample card to evaluate the color change in the test area according to GB/T250-2008 "Textile Color Fastness Test - Gray Sample Card for Evaluating Discoloration".

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