Test Method: SATRA TM44

Liability to wrinkle

May 1994

SCOPE

This method is intended to determine how much a material can be shortened or compressed in an edgewise direction without folding or forming pleats. The method is mainly applicable to footwear upper materials but can be used with any type of flexible sheet material.

PRINCIPLE

A rectangular test specimen is held at two positions along its length so that there is a known amount of excess material forming a hump. The specimen is then transversely compressed between two flat surfaces, at least one of which is transparent, and the degree of wrinkling is visually assessed subjectively. The test is repeated with a range of initial excess lengths until the transition between acceptable and unacceptable wrinkling is determined.

REFERENCES

This Test Method does not reference any additional Standards or Test Methods.

HISTORY

First issued November 1970. Revised June 1979, May 1994.

AVAILABILITY

This test method is available to members and non-members.

PRICE (ex. VAT)

This price is for a printed copy of the Test Method.

• Members: £75
• Non-members: £215

TYPE

• General and physical properties (other than strength)

USAGES

• Leather - uppers and linings
• Tests applicable to several material types
• Textiles and coated textiles, including synthetic uppers and linings