Causes and solutions of poor stretch ability of stretched film
Stretch film must have high puncture resistance, good shrinkage and certain shrinkage stress. During the shrinking process, the film cannot create holes. Since shrink film is often used outdoors, it is necessary to add UV anti-ultraviolet agent. Stretch film is our commonly used packaging material. In the process of using stretch film to package products, we often find that some stretch films can be stretched to more than 1 to 3 when stretched, while machine stretch films are more It can be stretched to more than 1 to 4; however, some stretched films can only be stretched to about 1 to 1.5-2 when used. So why is the stretch forming effect of the stretched film poor? Today we will introduce to you:
Stretch film
(1) The heating capacity of the heating plate is not enough.
(2) When the heating temperature does not match, when the temperature is too high, the film will stick to the heat sealing plate, increase the haze of the film, and the stretch molding will be partially thin. When the heating temperature is excessively low, the film heating temperature is low, and the film stretching temperature cannot be reached, and many of them are broken after stretching.
(3) The drawing depth is too deep.
Solution:
(1) Repair the heating plate to make it heat up normally and ensure the sufficient supply of heat.
(2) Lower or increase the temperature of the heating plate and adjust to a suitable temperature range.
(3) Correct use in the effective stretching range of the film. The deep-stretched film is stretched with a thicker film, and the lightly-stretched film is stretched with a thinner film, which not only ensures the quality of the product reduce manufacturing cost.
Shenzhen World Packing Industrial Ltd
Stretch Film & Packing Tape Specialist , Top China manufacturer
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