Biaxially oriented poly (4-methyl-1-pentene) film and preparation method thereof

A technology of biaxial stretching and longitudinal stretching, which is applied to flat products, other household appliances, applications, etc., can solve problems such as difficulty in film formation, difficulty in controlling thickness uniformity, and easy breakage, so as to solve the problems of easy breakage, prevention of degradation, Effect of increasing plasticity and tensile properties
CN112406146AActive Publication Date: 2021-02-26ANHUI TONGFENG ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI TONGFENG ELECTRONICS
Publication Date
2021-02-26

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Abstract

The invention relates to a biaxially oriented poly (4-methyl-1-pentene) film and a preparation method thereof, and particularly belongs to the technical field of high polymer materials. The film belongs to crystalline olefin resin, and is high in heat resistance, the melting point reaches up to 240 DEG C, and the working temperature can reach 140-160 DEG C. According to the preparation method of the poly (4-methyl-1-pentene) film, by setting temperature parameters of all sections in a production line, main factors influencing crystallization, stretching orientation and shaping processes of poly (4-methyl-1-pentene) molecules are controlled, and it is guaranteed that the product performance suitable for capacitor films is obtained; in the processing course, poly (4-methyl-1-pentene) resin with the optimal molecular weight is selected, the crystallization degree of the film is controlled and material degradation is prevented according to the temperature and stretching ratio suitable forprocessing, and the biaxially oriented poly (4-methyl-1-pentene) film which is resistant to high temperature and good in thickness uniformity is continuously produced.
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Description

Technical field

[0001] The invention relates to the field of capacitor materials, in particular to a biaxially stretched poly-4-methyl-1-pentene film and a preparation method thereof.Background technique

[0002] At present, the most commonly used medium for metallized film capacitors is biaxially oriented polypropylene film. The polypropylene particles have good mechanical properties and good chemical stability. The temperature and stretching ratio of each section of the production line are suitable for control and biaxially oriented film formation. However, because the melting point of polypropylene film is between 164°C and 176°C, it is difficult to improve the heat resistance of polypropylene film. Capacitors made of polypropylene film are usually set at 70°C or 85°C in the durability test. Although high-temperature-resistant polypropylene film has been developed today, in the durability test, if the test temperature of the polypropylene film capacitor is set to 105 ℃, the working fie...

Claims

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