Plastic Strapping Inspection Project

A common type of packaging material testing plastic strapping, also known as strapping or strapping, is an important part of container packaging. The materials are mainly PP and PET strapping, so what properties do manufacturers and buyers need to know about it? ? Next time you will understand. Appearance inspection (visual inspection) of the sample under natural light, including inspection items such as flatness, color, and pattern. Through the test, we can know whether the plastic strapping has a uniform color, neat and clear patterns, no obvious pollution, or impurities, and no defects such as cracking, damage, and perforation are allowed.

1. Size and size deviation

The dimensional deviation of plastic strapping mainly refers to the length deviation, width deviation, thickness deviation, etc., which should be within the specified deviation range.

This test can understand the specifications of plastic strapping produced by yourself. Find out if you meet the technical requirements for the enclosed sample.

2. Tensile strength

Tensile strength is the stress at which material produces maximum uniform plastic deformation.

This test is an important physical and mechanical performance index of plastic strapping. A tensile load is applied to the transverse direction of the sample, and it is deformed by external force until it is damaged, to understand the tensile stress of the packaging material.

3. Elongation at break

Elongation at break is expressed as a percentage (%) and usually refers to the ratio of the displacement of the sample at the break to the original length.

This test is a parameter index reflecting the toughness of the material! Elongation at break is a very important parameter in tensile properties, which usually refers to the elongation of the whole process.

4. Weight per meter

The so-called gram weight per meter is the weight of one meter of plastic strapping.

The obvious performance of this gram weight is the degree of softness and hardness of the plastic strapping. Generally, the plastic strapping with a large gram weight will be harder, and the plastic strapping with a small gram weight will be softer.

5. Skew rate

The skewness of plastic strapping is also known as plastic strapping straightness and plastic strapping camber. It refers to the degree of natural or left or right deflection of plastic strapping when it is flat and stationary.