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A kind of polypropylene resin composition for preparing packaging film and its film and film preparation method

A polypropylene resin and packaging film technology, applied in chemical instruments and methods, packaging, wrapping paper, etc., can solve the problems of limited transparency and gloss enhancement of polypropylene

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two properties must be considered comprehensively. The content of the nucleating agent disclosed in the Chinese patent CN101597400A is 0.01 to 0.02 parts per 100 parts of polypropylene, but this extremely low content of nucleating agent is very important for the transparency and gloss of polypropylene. The degree of improvement is very limited

Method used

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  • A kind of polypropylene resin composition for preparing packaging film and its film and film preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] First, the following components are fully stirred in a high-speed mixer according to the stated parts by weight until they are evenly mixed:

[0087] 100 parts of component (A) pellets

[0088] Nucleating agent ADKNA-21 (produced by Asahi Denka) 0.05 parts

[0089] Antioxidant Irgafos168 (produced by Ciba-Geigy, Switzerland) 0.1 part

[0090] Antioxidant Irganox1010 (produced by Ciba-Geigy, Switzerland) 0.2 parts

[0091] Afterwards, the above mixture was melt-blended, extruded and granulated at 220° C. using a 20 mm twin-screw extruder.

[0092] Finally, 10 parts of the above-mentioned pellets and C5 hydrogenated petroleum resin (PR130J, produced by Exxon-Mobil, Japan, molecular weight 3000) were melted at 230 °C by a sheet extruder with a diameter of 30 mm, and extruded into a cast film , the film was cooled on a cooling roll at 50° C. to form a cast sheet of 0.7 mm. Bruckner Koro4 Biaxial stretching device, stretch the obtained cast sheet 5.5 times in the longit...

Embodiment 2

[0094] Same as Example 1, except that the nucleating agent ADKNA-21 (manufactured by Asahi Denka) was changed to 0.1 part to obtain the implementation sample film 2, and the relevant properties of the film were measured, as shown in Table 1.

Embodiment 3

[0096] Same as Example 1, except that the nucleating agent ADKNA-21 (manufactured by Asahi Denka) was changed to 0.25 parts to obtain the implementation sample film 3, and the relevant properties of the film were measured, as shown in Table 1.

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Abstract

The present invention provides a polypropylene resin composition for preparing a package film, and the film and a preparation method thereof. The composition comprises, by weight, (A) 100 parts of a propylene polymer, (B) 0.01-1 part of a nucleating agent, and (C) 5-40 parts of a polar group-free petroleum resin, wherein the component (A) is a propylene homopolymer having a high stereoregularity and high melt strength, a melt index of the component (A) is 1.0-10 g / min, molecular weight distribution Mw / Mn of the component (A) is 6-20, the content of the molecules having a molecular weight of more than 5000000 is more than or equal to 0.8 wt%, Mz+1 / Mn of the component (A) is more than or equal to 70, and the component (B) is at least one selected from a sorbitol nucleating agent or an aryl phosphate nucleating agent. The obtained film has characteristics of excellent high temperature tension property, good rigidity, low haze and high gloss, and can be used for preparing thinning BOPP films.

Description

technical field [0001] The present invention relates to a kind of polypropylene resin composition, more specifically, relates to a kind of polypropylene resin composition used for preparing packaging film and its prepared film and film preparation method. Background technique [0002] As we all know, polypropylene film is widely used in the field of packaging materials due to its excellent optical properties, mechanical properties and packaging adaptability. Especially biaxially oriented polypropylene film (BOPP) is widely used in food, medicine, daily necessities, cigarettes, etc. Product packaging, and can be used as a substrate for high-strength composite films. [0003] Biaxially oriented polypropylene film (BOPP) is usually made of polypropylene resin as a raw material. After being extruded into a film, it is manufactured through a series of processes such as biaxial stretching, heat treatment, and cooling treatment. In order to adapt to large-scale high-speed film-fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L57/02C08K5/053C08K5/49C08K5/527B65D65/02B32B27/18B32B27/32
Inventor 唐毓婧施红伟盛建昉乔金樑张龙贵侯家祥黄红红魏东侯莉萍
Owner CHINA PETROLEUM & CHEM CORP