Composite slipping and anti-blocking masterbatch with high surface tension for BOPP (Biaxially Oriented Polypropylene) film and production process of masterbatch

Abstract

The invention discloses a composite slipping and anti-blocking masterbatch with high surface tension for a BOPP (Biaxially Oriented Polypropylene) film and a production process of the masterbatch. The masterbatch comprises the following components in percentage by weight: 65%-80% of polypropylene copolymer, 3%-5% of efficient slipping agent, 3%-5% of highly-dispersed anti-blocking agent and 14-25% of graft polymer. The preparation method comprises the following steps: weighing the component raw materials, uniformly mixing the weighed raw materials at a rotation speed of 80 r / min by use of a mixer, then carrying out melt extrusion on the mixed material by use of a twin-screw extruder, and then drying, cooling, pelletizing and molding. According to the masterbatch disclosed by the invention, the influence of coexistence of the slipping agent and anti-blocking agent on the overall performance of the produced film, such as the friction coefficient, transparency, haze and surface tension is improved, and the produced BOPP film has the advantages of small and stable friction coefficient, high light transmittance, low haze, stable surface tension, stable application performance and suitability for high-speed production and application.

Description

【Technical Field】 [0001] The invention relates to a high surface tension composite slip and anti-blocking masterbatch and its production process, in particular to a high surface tension composite slip and anti-blocking masterbatch for BOPP film and its production process, and belongs to the functional assistant technology for plastic films field. 【Background technique】 [0002] Among packaging materials, BOPP film has a very wide range of applications in the packaging field, and with the continuous expansion of the market, the production and use of BOPP film is developing in the direction of high speed, high quality and automation. Since the resin itself does not have smoothness and anti-blocking properties, in the production process of BOPP film, in order to prevent adhesion between BOPP films and affect the high-speed performance of the film, it is necessary to add a slip agent and anti-blocking on the surface of the BOPP film To solve these problems. [0003] At present, the s...

AI Technical Summary

Problems solved by technology

The first problem is to affect the gloss and transparency. Due to the migration of certain types of slip agents, the accumulation on the surface of the film, and the stability of the additives will affect the light transmittance and haze of the film, and the gloss will increase over time. The attenuation of degree and transparency is aggravated, and some anti-blocking agents greatly affect the gloss and transparency of the film, so that the performance of the film cannot meet the index requirements; the second problem is the high surface friction coefficient

Some films produced by smooth and anti-adhesion masterbatch have gradually larger friction coefficient, and the friction coefficient cannot meet the requirements. Some films have no continuous smooth performance, and the friction coefficient increases rapidly, which affects the high-speed performance of the film. Thereby reducing the production efficiency of customers; the third problem is the surface tension problem

However, these two technical solutions are functional masterbatches with a single performance, and the two functions cannot be concentrated in one masterbatch. Since the film needs to have smooth and anti-blocking properties at the same time, it is necessary to add two kinds of masterbatches at the same time. The same effect, but when adding two kinds of masterbatches, they must be mixed evenly before adding, which has the problem of dispersion uniformity, which affects the stability of the smooth and anti-blocking properties of the film

On the other hand, a masterbatch with a single function means that it has to run multiple process routes during production, and produce a functional masterbatch twice. From the perspective of production and adding processes, a masterbatch with a single function will inevitably bring a high cost burden

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