Special compound additive for polyethylene film with high tranparency and low density

Abstract

The invention relates to a special compound additive for a polyethylene film with high tranparency and low density, which is a particle prepared by the following steps of: stirring and mixing 25-30 percent of silicon dioxide anti-block agent, 5-15 percent of organic silicon glidant, 2-8 percent of organic silicon active crosslinking agent, 1-10 percent of organic silicon antioxidant and the balance of high pressure polyethylene resin by taking high-pressure polyethylene as a carrier; carrying out treatments including preheating, ball milling and dispersing at the temperature of 75-85 DEG C; and finally, extruding pelletization through a twin-screw granulator at the temperature of 140-170 DEG C. The low density polyethylene film prepared by adding the compound additive is tasteless, has high transparency, favorable physiological safety, high anti-blocking property, favorable smoothness and favorable transference resistance and can be particularly used for fields including food covering films, drug covering films, business card covering films, identification card covering films, advertisement packaging and the like which have the requirements of high transparency, high safety and high anti-blocking property.

Description

technical field [0001] The invention relates to a special composite auxiliary agent used in the production of high transparency and low density polyethylene film. Background technique [0002] Low-density polyethylene (LDPE), also known as high-pressure polyethylene, is a high-quality material for packaging films. It is widely used in the packaging of food, medicine and daily necessities. It is a thermoplastic obtained by ethylene radical polymerization under high pressure. It is made of LDPE. The film exhibits good optical properties, strength, flexibility, sealing, transparency, chemical inertness, etc., and is easy to form and process, which determines that LDPE is one of the most widely used materials in the polymer industry today. However, no matter what kind of plastic resin products are used, film products are very easy to stick to each other. Adding conventional anti-blocking agents will cause fish eyes, high turbidity, and decreased transparency, which will directly...

AI Technical Summary

Problems solved by technology

However, no matter what kind of plastic resin products are used, the film products are very easy to stick to each other. Adding conventional anti-blocking agents will cause fish eyes, high turbidity, and decreased transparency, which will directly affect its application and effect.

Some of the additives use amines, aromatic components, etc., which pose a physiological safety hazard to films used for food and pharmaceutical packaging.

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