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A kind of manufacture method of the polypropylene resin composition of high temperature cooking cpp film

A polypropylene resin, high-temperature cooking technology, applied in the preparation of polypropylene resin composition, high-temperature cooking CPP film field, can solve the problems of film quality decline, film-forming process performance deterioration, poor discoloration resistance, etc., to meet the processing requirements Process requirements, improved film-forming processability, and the effect of excellent mechanical properties

Active Publication Date: 2016-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, improper selection of additives or improper addition of additives will lead to a decrease in the quality of the film while obtaining good oxidation resistance of the film, and even worsen the film-forming processability.
The common primary antioxidant tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, auxiliary antioxidant tris (2,4-di-tert-butylphenyl) The stabilization system represented by phosphite is widely used in CPP special materials, but the biggest shortcoming of this formula system is that it has poor anti-discoloration ability, and the film is prone to discoloration such as yellowing and redness after storage for a short time, which affects Micro-appearance and properties of high-temperature cooking CPP film

Method used

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  • A kind of manufacture method of the polypropylene resin composition of high temperature cooking cpp film
  • A kind of manufacture method of the polypropylene resin composition of high temperature cooking cpp film
  • A kind of manufacture method of the polypropylene resin composition of high temperature cooking cpp film

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Embodiment 1～8

[0030] Take 500 kg of powdery polypropylene resin base material (light milky white powder, purchased from Shanghai Petrochemical Co., Ltd.), add each component of the additive according to the required ratio, and mix well. The material is put into a twin-screw extruder for melt mixing and granulation. The residence time of the material in the screw is 2-4 minutes. The temperature of the screw is controlled at 190-220°C, and the speed of the screw is controlled at 80-120 rpm. The obtained polypropylene resin particles are finished products after being cooled and dried. Each embodiment takes 500kg sample.

[0031] The polypropylene resin base material is composed of 93-99.5wt% propylene and 0.5-7wt% C 4 -C 8 The polypropylene copolymer obtained by copolymerization of α-olefin has a melt flow rate of 7.0-10.0 g / 10 min and an isotacticity of 95.0-98.0%.

[0032] The additive is composed of primary antioxidant, secondary antioxidants A and B and acid absorbing agent, among which...

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Abstract

The invention discloses a preparation method of a polypropylene resin composition for high temperature boiling a CPP film, which comprises the following steps: respectively metering a polypropylene resin base-material, a main anti-oxidant, an auxiliary anti-oxidant A, an auxiliary anti-oxidant B and an acid absorption agent and uniformly mixing; placing in a double screw extruder for melting, mixing and granulating, wherein the stay time of the material in a screw is 2-4 minutes, the screw temperature is controlled at 190-220 DEG C, and the screw rotating speed is controlled at 80-120 revolutions per minute; cooling, and drying the obtained polypropylene resin particles to obtain the finished product. According to the invention, the high temperature boiling CPP processing technology requirement can be satisfied, and the high temperature boiled CPP film has more excellent mechanical property, optics performance and anti color-changing performance.

Description

technical field [0001] The invention relates to a polypropylene resin composition, in particular to a polypropylene resin composition used for manufacturing a high-temperature cooking CPP film, and also relates to a preparation method of the polypropylene resin composition and a high-temperature cooking CPP film. Background technique [0002] Cast film (Castfilnl) is a non-stretched, non-oriented flat extrusion film produced by melt casting and quenching. Compared with blown film, it is characterized by fast production speed, high output, good film transparency, gloss, uniform thickness, and excellent balance of isotropic properties. At the same time, because it is extremely convenient for subsequent processes such as printing and compounding, it is widely used in the packaging of textiles, flowers, food, and daily necessities. [0003] CPP film can be divided into retort CPP film (Retort CPP, RCPP for short), aluminum-coated CPP film (Metalize CPP, MCPP for short), general...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08K5/13C08K5/526C08K5/3435C08K5/098B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08J5/18C08J2323/14C08K5/00C08K5/098C08K5/13C08K5/3435C08K5/526C08L2201/08C08L2203/16C08L23/14B29C48/04B29C48/40B29C48/911B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 陈国康王荣和曲云春刘勇蒋纪国薛振忠
Owner CHINA PETROLEUM & CHEM CORP
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