The design of decoration pattern on the film sleeve should be determined according to the thickness of the film. When designing the pattern, it is necessary to make clear the transverse and longitudinal shrinkage rate of the film, as well as the allowable shrinkage in all directions after packaging and the allowable deformation error after the shrinkage of decoration pattern, so as to ensure that the contracted pattern and text can be accurately restored. Three factors should be considered in the material of shrink sleeve label: environmental protection requirements, film thickness and shrinkage performance.
The determination of film thickness is based on the application field and cost factors of the label. In addition, the parameters required by processing equipment and other process factors also directly affect the selection of thickness. Generally, the film thickness of the shrink sleeve label is 30-70um, of which 40um and 50um are more widely used. In addition, there are certain requirements for the shrinkage of the film, and the transverse (TD) shrinkage is higher than the longitudinal (MD) shrinkage. The transverse shrinkage of common materials is 50% ～ 52% and 60% ～ 62%, which can reach 90% in special cases. The longitudinal shrinkage should be between 6% and 8%. When making shrink film sleeve label, the material with small longitudinal shrinkage should be selected as far as possible.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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