Standard Test Method for Grain Crack and Extension of Leather by the Mullen Test

Importancia y uso:

4.1 The test method is designed to measure the force required to crack the grain of leather by steady hydraulic pressure on a diaphragm of definite diameter applied to the flesh side of the specimen to form a sphere. The cracking of the grain is a result of failure under elongation or stretch. The elongation or stretch of the leather can be measured at different loads or at the failure of the grain to determine if the stress leather will withstand under lasting conditions. Cuts, scratches, and other defects will cause considerable variation in the results by concentration of the applied force to the weak points. This test method is excellent for manufacturing control, specification acceptance, and service evaluation in the lasting property of leather. This test method may not apply when the conditions of the test employed differ widely from those specified in the test method.

Subcomité:

D31.03

Referida por:

D2322-14R23

Volúmen:

15.04

Número ICS:

59.140.30 (Leather and furs)

Palabras clave:

burst strength extension; grain crack; leather; Mullen ;