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Low frog degree BOPP film and production process thereof

A low-haze, thin-film technology, applied in layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve the problems of high price of transparent nucleating agents, affecting product stability, carbonization, etc., and achieve product stability. Good performance, low production cost, and the effect of reducing haze

Inactive Publication Date: 2009-09-16
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the low haze film on the market is mainly to add transparent nucleating agent to the film to reduce the haze of the film, but the price of transparent nucleating agent is very expensive, and adding transparent nucleating agent is easy to produce after heating the extruder for a long time Carbonization phenomenon, affecting the stability of the product

Method used

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  • Low frog degree BOPP film and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Use biaxially stretched polypropylene resin to form a film with a three-layer structure after co-extrusion and biaxial stretching. The top layer 1 and bottom layer 3 are anti-blocking layers, and the middle layer 2 is an ordinary transparent layer, such as figure 1 shown. The top layer 1 and bottom layer 3 of the film contain 1.5% antiblocking agent by weight percentage, and the rest is polypropylene resin; the middle layer 2 contains 0.5% antistatic agent by weight percentage, and the rest is polypropylene resin. The anti-blocking agent is synthetic silica with a particle size of 2-5 microns. One side of the film is corona treated.

[0025] The film production process according to the above ratio:

[0026] a. During co-extrusion, the polypropylene resin is melt-extruded at 230°C to 250°C and passed through the die to form a cast sheet;

[0027] b. The cast sheet is quenched and crystallized at 10-20°C to form a thick sheet;

[0028] c. After preheating at 120°C-139...

Embodiment 2

[0032] Use biaxially stretched polypropylene resin to form a film with a three-layer structure after co-extrusion and biaxial stretching. The top layer 1 and bottom layer 3 are anti-blocking layers, and the middle layer 2 is an ordinary transparent layer, such as figure 1 shown. The top layer 1 and the bottom layer 3 of the film contain 2.5% antiblocking agent by weight percentage, and the rest is polypropylene resin; the middle layer 2 contains 1.5% antistatic agent by weight percentage, and the rest is polypropylene resin. The anti-blocking agent is synthetic silica with a particle size of 2-5 microns. One side of the film is corona treated.

[0033] The film production process according to the above ratio:

[0034] a. During co-extrusion, the polypropylene resin is melt-extruded at 230°C to 250°C and passed through the die to form a cast sheet;

[0035] b. The cast sheet is quenched and crystallized at 10-20°C to form a thick sheet;

[0036] c. After preheating at 120°C...

Embodiment 3

[0040] Using biaxially stretched polypropylene resin to form a three-layer film after co-extrusion and biaxially stretching, the top layer 1 and bottom layer 3 are anti-blocking layers, and the middle layer 2 is an ordinary transparent layer. The top layer 1 and the bottom layer 3 of the film contain 2% antiblocking agent by weight percentage, and the rest is polypropylene resin; the middle layer 2 contains 1% antistatic agent by weight percentage, and the rest is polypropylene resin. The anti-blocking agent is synthetic silica with a particle size of 2-5 microns. The film is corona treated on both sides.

[0041] The film production process according to the above ratio:

[0042] a. During co-extrusion, the polypropylene resin is melt-extruded at 230°C to 250°C and passed through the die to form a cast sheet;

[0043] b. The cast sheet is quenched and crystallized at 10-20°C to form a thick sheet;

[0044] c. After preheating at 120°C-139°C, the thick film is stretched long...

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Abstract

The invention discloses a low frog degree BOPP film and production process thereof, wherein the film is of three-layer construction formed by co-extrusion and bidirectional tension of bidirectional tension level poly-acryl resin. The top layer and the bottom layer of the film are anti-adhesion layer, comprising anti-adhesion agent 1.5-2.5% by weight percentage and acrylic resin; the middle layer is a general transparent layer comprising anti-static agent 0.5-1.5% by weight percentage and acrylic resin. The anti-adhesion agent with small grain size and ray radiation is used. The film crystallinity is controlled to reduce the frog degree of the film by regulating the formulation and the process temperature. The BOPP film has features of no addition of transparent nucleater, low production cost and high product stability.

Description

technical field [0001] The invention relates to a film and its manufacturing process, in particular to a polypropylene film with low haze and high transparency, referred to as BOPP film and its manufacturing process. Background technique [0002] Low-haze BOPP film is a kind of special BOPP film. The film is ultra-transparent and can be used for bag making, paper-plastic composite, printing and adhesive tape substrate. It is characterized by a very small haze (haze less than 0.3%) ). The packaging bag made of ultra-transparent film has very high transparency, smooth and glossy surface, so that there is almost no sense of barrier between the high-end products packed inside and the outside world. The color contrast between the printed part and the non-printed part of the printed ultra-transparent membrane product is strong, and it has a strong sense of hierarchy. The high transparency of the ultra-transparent adhesive tape makes it widely used in decoration, packaging seals ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/20B32B27/32B29C69/02B29C47/06B29C47/78B29C55/14
Inventor 陈铸红刘振华汪中祥
Owner ANHUI GUOFENG PLASTIC
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