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Low-temperature-resistant bidirectionally-stretched polypropylene thin film and preparation method of same

A polypropylene film, biaxially stretched technology, applied in the direction of chemical instruments and methods, lamination, layered products, etc., can solve the problems of poor film flexibility, easy to break the package, low toughness, etc., to achieve film crystal The effect of fewer dots, high transparency and less crystal dots

Active Publication Date: 2016-01-13
ANHUI GUOFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing BOPP film is only suitable for use in the environment of -40°C to normal temperature. When the use temperature drops below -40°C, the film's flexibility, toughness, and brittleness will deteriorate, and food safety problems such as bag breakage will easily occur.

Method used

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  • Low-temperature-resistant bidirectionally-stretched polypropylene thin film and preparation method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 45%wt ultra low density polyethylene, 40%wt linear low density polyethylene and 15%wt beta crystal nucleating agent are made into low temperature resistant masterbatch;

[0031] 30%wt polyolefin thermoplastic elastomer, 30%wt EPDM polymer and 40%wt octene ethylene copolymer were made into thermoplastic elastomer masterbatch.

[0032] The preparation method is as follows:

[0033] a. Add the raw materials of the low temperature-resistant core layer: 30% homopolypropylene, 20% thermoplastic elastic masterbatch and 50% low-temperature resistant masterbatch to the main extruder according to the proportion, and heat it into a molten state; The raw materials of halo treatment layer: 50% of copolymerized modified polypropylene, 40% of low temperature resistant masterbatch and 10% of silicon dioxide anti-blocking agent are added into an auxiliary extruder according to the proportion and heated and melted; Raw materials: 50% of copolymerized modified polypropylene, 40% of low-t...

Embodiment 2

[0049] 65%wt ultra low density polyethylene, 30%wt linear low density polyethylene and 5%wt beta crystal nucleating agent were made into low temperature resistant masterbatch.

[0050] 50%wt polyolefin thermoplastic elastomer, 20%wt EPDM polymer and 30%wt octene ethylene copolymer were made into thermoplastic elastomer masterbatch.

[0051] The preparation method is as follows:

[0052] a. Add the raw materials of the low temperature resistant core layer: 70% homopolypropylene, 10% thermoplastic elastic masterbatch and 20% low temperature resistant masterbatch to the main extruder according to the proportion, and heat it into a molten state; The raw materials of the halo treatment layer: 70% of copolymerized modified polypropylene, 25% of low temperature resistant masterbatch and 5% of silica anti-blocking agent are added to an auxiliary extruder according to the proportion and heated and melted; Raw materials: 70% of copolymerized modified polypropylene, 25% of low-temperature...

Embodiment 3

[0058] 50%wt ultra low density polyethylene, 40%wt linear low density polyethylene and 10%wt beta crystal nucleating agent were made into a low temperature resistant masterbatch.

[0059] 40%wt polyolefin thermoplastic elastomer, 20%wt EPDM polymer and 40%wt octene ethylene copolymer were made into thermoplastic elastomer masterbatch.

[0060] The preparation method is as follows:

[0061] a. Add the raw materials of the low temperature resistant core layer: 50% of homopolypropylene, 20% of thermoplastic elastic masterbatch and 50% of low temperature resistant masterbatch to the main extruder according to the proportion, and heat it into a molten state; The raw materials of halo treatment layer: 60% of copolymerized modified polypropylene, 30% of low temperature resistant masterbatch and 10% of silicon dioxide anti-blocking agent are added into an auxiliary extruder according to the proportion and heated and melted; Raw materials: 60% of copolymerized modified polypropylene, ...

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Abstract

The invention discloses a low-temperature-resistant bidirectionally-stretched polypropylene thin film and a preparation method of the same. The polypropylene thin film comprises, from exterior to interior, a low-temperature-resistant anti-adhesion layer, a low-temperature-resistant core layer and a low-temperature-resistant corona treatment layer. The low-temperature-resistant core layer is composed of 30-70% of homo-polypropylene, 10-40% of a thermoplastic elastic master batch, and 20-50% of a low-temperature-resistant master batch. The low-temperature-resistant anti-adhesion layer and the low-temperature-resistant corona treatment layer are both composed of 50-70% of copolymerized modified polypropylene, 25-40% of a low-temperature-resistant master batch and 2-10% of a SiO2 anti-adhesion agent. The polypropylene thin film has excellent low-temperature-resistant performance, has excellent use performance even at -30 DEG C, is soft, is excellent in printing performance, has excellent physical performance and is simple in preparation method.

Description

technical field [0001] The invention relates to the technical field of films, in particular to a low temperature resistant biaxially stretched polypropylene film and a preparation method thereof. Background technique [0002] Biaxially oriented polypropylene film (referred to as BOPP film) is to make the melt of high-molecular polypropylene into a sheet or thick film through a narrow and long die, and then in a special stretching machine, at a certain temperature and set The film is stretched in two vertical directions (longitudinal and transverse) at the same time or step by step at a high speed, and is made by proper cooling or heat treatment or special processing (such as corona, coating, etc.). BOPP film is a very important flexible packaging material. BOPP film is colorless, odorless, tasteless, non-toxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. [0003] Existing BOPP films are only suitable for use in environments r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/16B32B27/18B32B27/32B32B37/15B32B38/18
CPCB32B27/06B32B27/16B32B27/18B32B27/32B32B37/153B32B38/18B32B2250/03B32B2250/242B32B2307/30B32B2307/406B32B2307/412B32B2307/5825
Inventor 王红兵朱峰
Owner ANHUI GUOFENG PLASTIC
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