Effect of smoothness agent on heat sealing strength of composite PE film
In the same structure, the same thickness and the same process, the heat sealing strength of polyethylene film with more lubricant content is worse than that with less lubricant content.
As a heat sealing material for flexible packaging, the content of the lubricant in the raw material of polyethylene film is very important to the composite peel strength, opening property, smoothness and heat sealing strength. If this point is ignored, it will lead to quality accidents and losses. Therefore, flexible packaging manufacturers should pay attention to the factors such as the thickness and thickness of polyethylene film, the amount and amount of smoothing agent in the film.
According to the introduction of relevant materials, the rationality of selecting thin films can be judged by the following formula: (for reference only)
The content of the lubricant (PPM) x film thickness (UM) = 2200-26000, combined with the reasonable production process, the composite product has a certain degree of peeling, and the composite film has enough smoothness to meet the needs of customers.
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The additives in PE film have great influence on the adhesive strength, such as erucic acid amide, oleic acid amide and so on. In general, the thicker the film, the more smooth agent per unit area. The practice shows that when the thickness of polyethylene film is more than 60 μ m, the precipitation of additives will be greatly increased. This is because, at the same specific surface area, with the increase of film thickness, the measurement of additives in the film increases correspondingly. When the content of additives in the film exceeds a certain amount, the performance of the film will be affected. When the content of lubricant in the film (PPM) × film thickness (μ m) is between 2200 and 26000, with reasonable production process, the composite product can not only have a certain peeling strength, but also make the composite film have enough smoothness. However, when the content of lubricant (PPM) × film thickness (μ m) is more than 26000, the peeling strength of PU adhesive may decrease greatly due to the precipitation of the lubricant.
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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