Inflatable Test Method for Abrasion Resistance of Automotive Fabric Rubber Films

Rubber film inflation test method for abrasion resistance of automobile fabrics

This test method refers to the test method for testing woven fabrics and fabrics woven using a rubber film inflation testing machine. This procedure is not suitable for floor coverings. Note 1: Other procedures for determining the abrasion resistance of textile fabrics are given in Test Methods D3884, D3885, D1175, AATCC61.

Determining the abrasion resistance of fabrics and other materials is complex. Its resistance to abrasion is affected by many factors such as: the mechanical properties of the fibers, their dimensions, the structure of the yarns, the structure of the fabric, as well as the type, variety and quantity of finishing materials added to the fibers, threads and fabrics.

Abrasion resistance is also greatly affected by environmental conditions.and is. For example: the different actions of natural abrasive materials rubbing on the specimen, the tensile force of the specimen, the pressure between the specimen and the abrasive material, as well as dimensional changes of the specimen.

Variations in the wear test over a given test period are attributed to changes in the abrasive material. According to some standards, at frequent intervals or during periodic checks, this abrasive material must be replaced. Use any abrasive material only once or replace it after limited use. It is assumed that the permanent abrasive material used on a hard metal or similar surface does not change during a specified series of tests. But similar grinding materials used in different laboratories remain almost unchanged at the same speed and different usage methods. Permanent abrasive materials can also be altered bydue to cleaning at frequent intervals of the finish or other materials extracted from the test fabric. The determination of quantities linked to wear is also influenced by the evaluation method and the judgment of the operator.

When measuring the abrasion resistance of fabrics on a laboratory testing machine, one of several factors usually plays a role in the abrasion or resistance to abrasion of the material. Wear resistance (generally specified to produce a specified degree or amount of wear using a specified technique over a specified number of revolutions on a specified machine) and durability (defined as the ability to resist degradation or wear (bursting during use, including the effects of abrasion) are often linked, this correlation varies according to different uses of the terminal. Different factors may be required for any durability estimate in a specific wear profileified.

This general test method is applicable to all types of fabrics. Including woven fabrics, non-wovens and decorative fabrics, household fabrics, industrial fabrics, floor coverings. It is not surprising to find several types of wear testing machines, wear-resistant materials, testing conditions, testing procedures, wear resistance evaluation methods. wear and interpretation of results. Test Me All Methods and machines measuring abrasion resistance between different operators and in different laboratories show a high degree of variability in results. However, the proposed testing method is still widely used. The determination of the relevant wear resistance meets a clear requirement. Standard testing methods are necessary and useful and can potentially clarify issues and reduce confusion. Due to the conditions mentionedborn above, technicians often fail to achieve better consistency of results obtained on the same type of laboratory testing machines, and the accuracy of this testing method is uncertain. Due to the low accuracy of this test method, this test method is not recommended for acceptance testing between buyer and seller contractual agreements. When this test method is used for acceptance testing, the discrepancy in test statistics between the buyer\'s and seller\'s laboratories will be determined if any of the differences in the numerical ratios of the buyer and seller disagree. Each comparison is based on a random sample of test coupons from a single batch of material of the type being evaluated.

The instrument includes the following basic elements:

Surface friction head --- relies on the loop and locking ring to place the prouvette on the rubber film. In plier-shaped pliers, the diameter of the loop ring circle is 94.0 ± 1.3 mm (3.70 ± 0.05 in) and the diameter of the lock ring circle is 95.3 mm or more. . The height from the top edge of the locking ring to the surface of the clamped specimen shall not exceed nine point five millimeters (3/8 in.). During the test, the clamped parts of the clamp and the ring should be tightly clamped together to prevent the sample from slipping and leaking air pressure. This test method provides air pressure to the fixture, so the air pressure under the diaphragm should be controlled between 0 and 41 kpa (0 and 6 psi), with an accuracy range of ±5%.

Vibrating membrane----The thickness of the rubber membrane is 1.40 ± 0.25 mm (0.055 ± 0.010 inches). Seal a 3.2mm (1/8IN) diameter metal contact plug to the center of the diaphragm and flush to the surfaceof the diaphragm.

Drive device---The design of the drive device is a circular clamp, which performs a corresponding double-row impact action with a stroke of 25mm per second. In addition to the corresponding actions, the rotation of the luminaire will be specified so that a rotation can be performed with not less than 50 and not more than 100 double-row impacts.

Balance head and wear platform ----The sandpaper is placed on a platform and strictly clamped by a double rod parallelogram to prevent the sample from being moved by the alternative sample holder. The plane can move freely vertically. The wear platform assembly maintains vertical pressure using a weight equal to 0 to 2.2 kilograms (0 to 5 pounds). The provision will be made by placing different wear items on the platform, such as sandpaper, cloth, etc., and stretching them to a posiflat position. An electrically insulated contact pin for adjusting the thickness of the abrasive is placed on the longitudinal axis platform at a rotating point in the center of the fixture.

The inflatable membrane tester can be equipped with a continuously changing wear head, available from the machine manufacturer. Note 2: The machine manufacturer does not specify the use of the wear head which continues to change. The manufacturer must prepare a set of instructions for use.

Machine stopping device: the adjustment pin on the lower surface of the wear table contacts the contact pin inserted in the center of the diaphragm, close to a low circuit tension, and stops the machine.

Indicator --- This indicator will display the diaphragm tension and wear revolutions (1 revolution = 1 double impact).

Sampling:

Samples are taken in accordance with the specifications of the materialapplication material or specifications agreed by the buyer and seller. In the absence of specifications or other agreements, laboratory samples must be taken in accordance with 7.1.1.

Collect laboratory samples from each batch sample roll or block. The sample should measure 50 cm (approximately 20 inches) in width by its original width and be positioned at least 1 minute (1 meter) from each end of the fabric.

Shipping of samples with exterior coating will be subject to consensus between buyer and seller.

Number and preparation of test coupons:

If the number of coupons is not limited by material specifications or agreement between buyer and seller , the number of coupons for this test for five.

If the number of test strips exceeds the number of laboratory samples, the additional test strip will be removed and the laboratory sampletory will be selected at will. Otherwise, test one coupon per laboratory.

Test coupons are drawn from coated samples agreed upon by all groups involved.

Cut a circular test piece with a diameter of 1 to 12 mm (43/8 in). It is not permitted to take two test pieces from the parts of the fabric which have stripes or loops, or from the warp and weft parts of the fabric.

Pretreatment:

Unless testing a wet specimen, place the specimen in a standard atmosphere with approximately equal humidity for pretreatment, then place it in The test is carried out under the equilibrium humidity of the standard atmosphere. When continuously weighed at intervals of at least 2 hours, the surface area of ​​the specimen represents 0.1% of the original surface area of ​​the specimen. Balance is considered to have been achieved.

Damage------Carry the test piece until the optical fiber in the center of all zoworn out. This brings the contact pivot on the wear table into contact with the pivot on the vibrating plate, activating the relay and stopping the machine.in.

Visual quality: Carry the specimen through a specified number of rotations to visually assess the impact of wear on the shine, color or structure of the fabric. Note: Unless continuously changing wear heads are used, it is recommended to replace the sandpaper at a normal frequency, such as every 100 to 300 revolutions. The frequency depends on the type of fabric tested and the working group is working on a broader system.

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