A five-layer co-extrusion film for transfusion and its preparation process

Abstract

The invention relates to a five-layer co-extrusion infusion film and a preparation process thereof. An outer layer is composed of a homo-polypropylene and a styrene-ethylene-butadiene hydrogenated block copolymer, a secondary outer layer is composed of an ethylene methyl acrylate copolymer and modified linear low-density polyethylene, a middle layer is composed of an ethylene-octene copolymer andmodified linear low-density polyethylene, a secondary inner layer is composed of metallocene low-density polyethylene and linear low-density polyethylene, and an inner layer is composed of an ethylene-propylene copolymer and a styrene-ethylene-butadiene hydrogenated block copolymer; and the preparation process comprises the following steps: separately sucking each layer of raw materials into eachextruder hopper, performing plasticizing, performing filtering and removing impurities through a filter screen, performing extrusion separately through a connecting pipeline and a die head, and combining five layers in a mouth model place to form a green body; and performing one-time wind cooling on the green body, performing cooling by using water ring water to obtain the high-transparency product. The preparation process provided by the invention ensures the properties such as film light transmittance, low-temperature heat sealability, heat sealing strength, printability, and resistance to cooking at 121 DEG C.

Description

technical field [0001] The invention relates to a film for intravenous infusion medicine packaging, in particular to a five-layer co-extrusion film for infusion and a preparation process thereof. Background technique [0002] The widely used infusion packaging is glass bottles and hard plastic bottles. They have a weakness, that is, they need to form an air circuit during use, which increases the secondary pollution during the infusion process, especially in hospitals where there are many bacteria. and places with poor sanitation. During use, the PVC infusion soft bag can rely on its own tension to compress the liquid medicine to drip out, which greatly reduces the probability of secondary pollution of the liquid medicine, but the disadvantage is that it contains the plasticizer diisooctyl phthalate (DEHP) A harmful substance that seriously endangers human health. The State Food and Drug Administration stopped the registration of PVC infusion bags as early as September 2000...

AI Technical Summary

Problems solved by technology

[0004] Currently, the non-PVC multi-layer co-extruded infusion films on the market are three-layer co-extruded infusion films and five-layer co-extruded infusion films, of which three layers are co-extruded Extrusion film for infusion is low in cost and high in strength, but poor in flexibility and brittle, especially at low temperature, it is easy to cause liquid leakage; five-layer co-extrusion film for infusion has good flexibility and good barrier properties, and can meet various conditions. Use, but the outer polyester material has high requirements for equipment and high cost

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