Polyvinyl chloride / polyurethane elastomer medical material and preparation method thereof

Abstract

The invention discloses a polyvinyl chloride / polyurethane elastomer medical material and a preparation method thereof. The polyvinyl chloride / polyurethane elastomer medical material comprises the following components by weight: 50-90 parts of polyvinyl chloride resin, 10-50 parts of polyurethane, 20-60 parts of a plasticizer, 5-10 parts of a cold resistant plasticizer, 1-10 parts of a heat stabilizer, 0.1-2 parts of an antioxidant and 0.1 -1 parts of a lubricant. The polyvinyl chloride / polyurethane elastomer material provided by the invention has superior cold tolerance, and can be used for a long time at 50 -60 DEG C according to GB / T5470-2008 standard test, and can be used in the manufacture of packaging material for blood bags or other blood products, and other the medical materials.

Description

technical field [0001] The invention relates to a medical polyvinyl chloride / polyurethane elastomer and a preparation method thereof. Background technique [0002] Plasticized polyvinyl chloride (PVC) has the advantages of good air permeability, simple processing technology, and low production cost. It is the main material for making disposable infusion devices, especially in blood preservation materials. But at the same time, the infusion (blood) bag made of PVC material has poor flexibility at low temperature during storage, especially when it is obviously hardened below -20°C, it is easy to cause the bag to break. At present, the low temperature storage temperature can only reach -30°C ~ -40°C ℃, which greatly limits its application. Thermoplastic polyurethane elastomer (TPU) has the advantages of good cold resistance (low temperature embrittlement temperature below -60°C), good biocompatibility, anticoagulation, high strength, good toughness, etc., and has a wide range ...

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Problems solved by technology

[0004] However, the current research on the blending of PVC and TPU is mainly focused on improving the mechanical properties, heat resistance, and solvent resistance of the material through the blending of the two, and rarely pays attention to the cold resistance of this type of material; TPU can effectively improve the performance of PVC materials. Cold resistance, if the storage temperature of the material is lowered to -50°C to -60°C, the storage time of blood will be greatly extended, which has great clinical medical value

In addition, cold-resistant plasticizers are rarely added in the selection of plasticizers. Therefore, the cold resistance of the obtained materials is poor, and it is difficult to meet the needs of normal use at -50°C to -60°C; moreover, the currently obtained PVC / TPU blend materials are mainly used in cables, pipes and leather products, etc. There are almost no medical materials that can be used for low temperature storage

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