Polyolefin multi-layer co-extrusion infusion film and technique of preparing the same

Abstract

The invention relates to a polyolefin multi-layer coextruded transfusion film and preparation technology thereof. The transfusion film has a three-layer structure in material composition, wherein the first layer is an inner layer A, namely an inner sealing layer, a component of the inner sealing layer is a mixed resin consisting of a polypropylene material (PP) and a thermoplastic elastic copolymer of a styrene-ethylene-butene rubber-styrene copolymer (SEBS), and the adding amount of the SEBS in the mixed resin is between 30 and 50 weight percent; the second layer is an intermediate layer B, namely a core layer, a component of the core layer is the styrene-ethylene-butene rubber-styrene copolymer (SEBS); and the third layer is an outer layer C, namely a weather-resistant layer, and a component of the weather-resistant layer is polypropylene (PP). The thickness of the inner layer A accounts for 15 to 25 percent of the total thickness of the transfusion film, the thickness of the intermediate layer B accounts for 50 to 70 percent of the total thickness of the transfusion film, and the thickness of the outer layer C accounts for 15 to 25 percent of the total thickness of the transfusion film. The transfusion film has the advantages of low microparticle number, few exudants, resistance of high temperature of 121 DEG C, low water vapor transmission rate, good transparency, broad drug compatibility and so on, and is a better packing material for electrolyte transfusion and nutrition transfusion.

Description

technical field [0001] The invention relates to a multi-layer co-extrusion transfusion film made of polymer materials and its preparation process, more specifically, relates to the packaging material of injection liquid medicine in the medical field, which replaces PVC transfusion film and glass bottle transfusion medicine Polyolefin multilayer co-extruded transfusion film and its preparation process. Background technique [0002] 1) The harm of ordinary PVC infusion membrane [0003] PVC has many excellent physical properties and is favored by all walks of life. However, PVC has been questioned, restricted and banned by various countries in the field of food and medicine. The main hazards are as follows: [0004] 1) Ordinary PVC infusion membranes contain harmful PVC monomers, which are highly toxic substances. [0005] 2) Ordinary PVC infusion film will form hydrochloric acid after burning, which will cause dangerous lung damage and erosion of buildings. Chlorinated org...

AI Technical Summary

Problems solved by technology

[0004] 1) Ordinary PVC infusion film contains harmful PVC monomer, which is a highly toxic substance

[0005] 2) Ordinary PVC infusion film will form hydrochloric acid after burning, which will cause dangerous lung damage and erosion of buildings

[0006] 3) During the storage of ordinary PVC infusion membranes, part of the liquid medicine may react with PVC, resulting in deterioration of the liquid medicine and making it unusable

[0007] 4) During the storage of ordinary PVC infusion membranes, 30%-40% of the PVC plasticizer DEHP contained in them may be dissolved. DEHP is toxic and can release estrogen. Exposure to DEHP can lead to dysplasia of the reproductive system

[0008] 5) During the storage process of ordinary PVC infusion membrane, PVC will form adsorption to the drug, which will reduce the efficacy of the drug.

At present, the structures adopted in China mainly include three-layer and five-layer structures, but the materials used in each layer are different, and the quality and usability are also uneven.

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