What is ASTM D882?
ASTM D882 is a common testing standard that is used to determine the tensile properties of thin plastic films and is commonly used for in-line quality control purposes.
How do you measure the tensile strength of a film?
Tensile Strength and Tensile Elongation Using a tensile testing machine, the film is pulled at a speed of 200 mm/min, calculating the strength when the film sample tears (a value obtained by dividing the tensile load by the cross-sectional area of the sample) and the amount of elongation.
How does ASTM D638 work?
ASTM D638 is performed by applying a tensile force to a sample specimen and measuring various properties of the specimen under stress. It is conducted on a universal testing machine (also called a tensile testing machine) at tensile rates ranging from 1 to 500 mm/min until the specimen fails (yields or breaks).
What is ASTM D638?
ASTM D638 is one of the most common plastic strength specifications and covers the tensile properties of unreinforced and reinforced plastics. This test method uses standard “dumbell” or “dogbone” shaped specimens under 14mm of thickness.
What is tensile modulus of plastic?
The tensile modulus is the ratio of stress to elastic strain in tension. A high tensile modulus means that the material is rigid – more stress is required to produce a given amnount of strain. In polymers, the tensile modulus and compressive modulus can be close or may vary widely.
What kind of tensile test is ASTM d882?
This test is very similar to ASTM D638 test whereby plastic material is pulled until it breaks in order to measure elongation, tensile modulus, tensile yield strength, and tensile strength at break. Unlike ASTM D638, however, D882 is designed specifically for thin sheeting and film less than 1 mm (0.04″) thick.
Which is ASTM test method for thin plastic sheeting?
ASTM D882-09, Standard Test Method for Tensile Properties of Thin Plastic Sheeting, ASTM International, West Conshohocken, PA, 2009, www.astm.org
How is the tensile strength of plastic measured?
This test is very similar to the common ASTM D638 test whereby plastic material is pulled until in breaks in order to measure elongation, tensile modulus, tensile yield strength, and tensile strength at break. However, it is designed specifically for thin sheeting and film less than 1 mm (0.04″) thick.
Why are pneumatic grips used on ASTM d882?
The rubber coating prevents the film from prematurely breaking at the grip edge and also keeps it from slipping. Pneumatic grips are used as a matter of convenience when testing but are not required. You can open the pneumatic grips with finger toggles or foot pedals.