BOPP film with endurable and smoothness characteristics and preparation method therefor

Abstract

The invention discloses a BOPP film with endurable and smoothness characteristics. The BOPP film is formed by a core layer, a surface layer and an inner layer through co-extrusion and combination. The surface layer comprises, by weight, 96.0%-96.8% of homo-polypropylene resins, 0.1%-2.0% of slipping agents and 0.1%-2.0% of antiblocking agents. The core layer comprises, by weight, 99.5%-99.7% of homo-polypropylene resins and 0.3%-0.5% of antistatic agents. The inner layer comprises, by weight, 84.1%-84.9% of homo-polypropylene resins, 14.0%-14.9% of slipping master batches and 0.1%-2.0% of antiblocking agents. The invention also discloses a preparation method for the BOPP film. The slipping master batches are prepared from homo-polypropylene resins, nano inorganic materials and slipping agents through the synergistic effect and are added in the inner layer components, the finally prepared BOPP film has various performances same as a common BOPP film, and can delay loss of the slipping agents in the product. Thus the slipping system plays a lasting and effective role, the packaging film has durable slipping characteristics in a certain time quantum, and the packaging speed is ensured.

Description

Technical field [0001] The invention belongs to the technical field of plastic film production, relates to a packaging film material, and specifically relates to a BOPP film with durable and slippery properties and a preparation method thereof. Background technique [0002] BOPP film, short for "Biaxially Oriented Polypropylene", is a biaxially oriented polypropylene film. It is an important flexible packaging material with a wide range of applications. It can be used as the surface material of composite films in packaging of food, daily necessities, etc., and is also used for coating, etc. In secondary processing and production. [0003] In actual production, the addition of slip agent can make the surface of BOPP film slippery and reduce the friction coefficient of the surface to the required level or value, which is beneficial to improve the smoothness of composite flexible packaging materials when passing through automatic packaging machines. Slip agents are usually add...

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Problems solved by technology

[0004] However, after a period of time, the slip agent migrated from the inner layer of the BOPP film will cause loss through other methods such as volatilization and precipitation. If the migration speed to the surface of the film is too fast, the performance of the film will change greatly during the storage period. , such as decreased gloss, increased haze, sticky film, fast attenuation of friction coefficient, etc., resulting in shortened use timeliness for downstream customers

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