Low-friction coefficient anti-bonding master batch special for metallized base film and preparation method thereof

Abstract

The invention relates to a low-friction coefficient anti-bonding master batch special for a metallized base film and a preparation method thereof. The low-friction coefficient anti-bonding master batch mainly comprises, by weight, 90-95 parts of polypropylene resin and 5-10 parts of polymethylsesquisiloxane-polyphenylsilsesquioxane. The polymethylsesquisiloxane-polyphenylsilsesquioxane is a ladder polymer with R3SiO terminated. The molecular formula of the polymethylsesquisiloxane-polyphenylsilsesquioxane is [CH3SiO1.5]n-[PhSiO1.5]m, wherein n is 5-8 and m is 2-5. According to the preparation method, an anti-sticking agent is added by means of side feeding through precision electronic weight loss scales, and pelleting is performed after melt blending by means of the special double-screw process. By the adoption of the method, the problem that no slipping agent (master batch) can be added into the metallized film and thus the friction coefficient is high and the problem that the low friction coefficient is required under the condition that no migration slipping agent can be added into an aluminum laminated film are effectively solved. The friction coefficient of the obtained metallized base film is lowered to 0.4 or below from 0.8 or above, the slipping property is good, no migration happens, and the product surface is not greasy, high in glossiness, resistant to abrasion, lasting and effective.

Description

technical field [0001] The invention relates to the field of functional polymer materials, in particular to a special low friction coefficient anti-adhesion masterbatch for metallized base films and its preparation. Background technique [0002] At present, there are two types of anti-adhesives commonly used in the domestic and foreign markets: inorganic anti-adhesives and organic anti-adhesives. Modern technology has developed a series of inorganic anti-blocking agents that can be used as thin films, such as diatomaceous earth, talcum powder, silicon dioxide, etc. But not all inorganic additives are effective. Moreover, some effective inorganic additives have other problems, such as high mechanical wear, great influence on optical properties, harmful to human health, etc., which limit their use. For example, Radosta et al. pointed out that diatomaceous earth is often used as an anti-blocking agent for films, but it will reduce the gloss of the film, high mechanical wear a...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a multifunctional masterbatch and its production process which can play a good anti-blocking effect and can reduce the friction coefficient of the metallized film, so as to solve the problems in the metallized base film that cannot be solved in the prior art. It is difficult to add a slip agent to reduce the coefficient of friction; and the existing materials for reducing the coefficient of friction have the problems of high hardness, easy to scratch the film surface and wear equipment, and the choice of particle size is not suitable for the anti-sticking agent of the metallized base film And other issues

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