Medical super-tough puncture-resistant high-barrier composite film and preparation method thereof

Abstract

The invention relates to a medical super-tough puncture-resistant high-barrier composite film and a preparation method thereof. A multilayer laminated structure of polyester with a high-melting-pointcrystal form and crystalline polyamide resin is selected as a core layer of the composite film, so that the characteristics of puncture resistance and high barrier are achieved; an inner surface layeris prepared by adopting low-melting-point amorphous polyester, has good low-temperature heat sealing performance, and can have good binding force with the core layer, so that the problem of easy layering with the core layer is solved; and the outer surface layer is prepared by adopting low-crystallinity copolymerized polyester, has good printing and barrier performance, and has good adhesive force with the core layer. According to the invention, a multi-layer co-extrusion and lamination technology is used for carrying out processes such as die head extrusion, stretching and the like, so thatthe composite film with controllable thickness, easy molding and relatively high film yield is prepared. Meanwhile, the raw materials are cheap and are easily available, the preparation process is easy to control, and the composite film has industrial production and practical application values.

Description

technical field [0001] The invention belongs to the technical field of medical polymer materials, and in particular relates to a medical puncture-resistant high-barrier film and a preparation method thereof. Background technique [0002] China's non-PVC multi-layer co-extruded medical sterile film market is huge, and the demand for medical infusion fluid consumption is growing at a rate of 5-8% per year. Now it mainly relies on imports from Europe, the United States and Japan. [0003] At present, the mainstream non-PVC multi-layer co-extruded medical film consists of three layers. The inner layer requires good heat sealability, puncture resistance, inertness and elasticity with the liquid medicine, and generally uses PP, SEBS and other materials; the middle layer requires good flexibility, barrier properties, transparency, and mechanical strength, mainly using SEBS , PE, PP and other materials; the outer layer requires good printability, barrier properties, transparency an...

AI Technical Summary

Problems solved by technology

The core layer uses a multi-layer laminated structure of a high-melting point crystalline polyester and a crystalline polyamide resin, which solves the film properties of puncture resistance and high barrier; the inner surface layer uses a low-melting point amorphous polyester, which has good Excellent low-temperature heat-sealability, and good adhesion with the core layer, which solves the problem of easy delamination with the core layer; the outer layer is made of a low-crystallinity copolyester, which has good printability and barrier properties , and has good adhesion to the core layer

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