Composite raw material for preparing polyamide film and preparation method of composite raw material

Abstract

The invention discloses a composite raw material for preparing a polyamide film and a preparation method of the composite raw material. The composite raw material is prepared in steps as follows: a composite particle additive consisting of two inorganic articles with different particle sizes is added in a polyamide polymerization process, after polymerization, obtained polyamide is subjected to granulation, extraction and drying, the obtained material is mixed with bisamide compounds, and the composite raw material for the polyamide film is obtained. Processing master batch is not required tobe used additionally when the composite raw material is used for preparing the film, and the prepared polyamide film has ideal mechanical performance, transparency, stretchability, blocking resistanceand the like.

Description

technical field [0001] The invention relates to a raw material for producing polyamide film, in particular to a polyamide film raw material modified by inorganic particles and a preparation method thereof, belonging to the technical field of polyamide film preparation. Background technique [0002] Polyamide film has excellent strength and toughness, resistance to freezing and high temperature, good oxygen barrier properties, puncture and tear resistance, good transparency and gloss, and low haze. It is especially suitable for cooking, freezing, and vacuum packaging, and is widely used in food, chemical products, and electronic product packaging. [0003] The polyamide used in the production of film needs to be able to form a fine and uniform crystal structure during processing and molding, so as to ensure that the film is not easy to break during the forming and stretching process, and the finished film has ideal transparency. At the same time, the prepared film is require...

AI Technical Summary

Problems solved by technology

[0005] In view of the existing polyamide film processing masterbatch mainly relying on the addition of inorganic powder to improve the processing performance and the performance of the finished film, there are defects such as inorganic powder is easy to agglomerate, resulting in defects in the film product, and the performance of the finished film is not significantly improved. The object of the present invention is to provide a polyamide film combination raw material with excellent processing performance, and the prepared polyamide film has excellent mechanical properties, transparency, stretchability, anti-blocking properties, etc.