Rolling easy-to-tear hard PVC transparent film

Abstract

The invention discloses a rolling easy-to-tear hard PVC transparent film. The composition formula comprises 45%-50% of PVC resin A; 30%-35% of PVC resin B; 8%-10% of impact resistance modifier; 1.8%-2.2% of stabilizer; 2.0%-2.5% of crosslinking agent; and an appropriate amount of auxiliary agent; the film production process comprises the steps of burdening, mixing, melting plastifying, mixed refining, distributing, transient high temperature rolling and forming, cooling and shaping, and finished product sheet processing process; the transient high temperature rolling and forming uses a six roll calenders, the rubber material is compressed and formed by the front four roll calenders under the temperature of 110 DEG C-130 DEG C; the temperatures of the later two roll calenders are set as 210 DEG C or above, which creates the high temperature changes of gradient, and the sheets are instantly finished and formed. The optimized composition formula guarantees the softness of the PVC hard film, the transient high temperature sheet rolling process is adopted, the transparency of the film is enhanced; so that the film satisfies the tear-line opening requirement, and the phenomena of mistake tearing, side tearing, torn edges, thorn edges are prevented in the tear-line use process.

Description

technical field [0001] The invention relates to the technical equipment field of PVC hard film, in particular to a calendered PVC easy-to-tear hard transparent film. Background technique [0002] Hard film is also called film, and its thickness is greater than 2mm is called plate, usually including PET (polyethylene terephthalate) hard film, PVC (polyvinyl chloride) hard film, PS (polystyrene) hard film, ABS (engineering plastics). PVC hard film is a high-quality plastic composite material, which is widely used in various packaging materials; its surface is smooth and bright, without cracks and bubbles, and its color is uniform; it has strong acid, alkali, heavy pressure, tensile, anti-aging, Anti-static and other features. [0003] In the prior art, due to the low cost and simple production process of PVC film, it is often used in product packaging with surface easy-tear lines, and the processing of easy-tear lines is done manually or mechanically; due to the different ad...

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Problems solved by technology

[0003] In the prior art, due to the low cost and simple production process of PVC film, it is often used in product packaging with surface easy-tear lines, and the processing of easy-tear lines is done manually or mechanically; due to the different additives and processing techniques of traditional PVC films, The softness of the film is not suitable, which leads to the easy-tearing line produced on the PVC hard film product. During the use, there are easy-tearing line mistearing, side tearing, tearing burrs, and burrs, and the easy-tearing line is tearing. The defects of poor flatness and easy cracking; therefore, it is urgent to develop a PVC hard film material with high transparency and good tear quality.

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