Raw material commixed polypropylene multilayered co-extrusion transfusion film and production method thereof

Abstract

The invention relates to the technical field of a production method for a medical polymer film material and particularly relates to a raw material commixed polypropylene multilayered co-extrusion transfusion film and a production method thereof. The production method comprises the following steps: respectively sucking each plastic raw material on each layer into a hopper scale of a weighing type blender mixer to be weighed; after weighing, enabling the raw materials to fall into an agitating barrel to be agitated; enabling the lower end of the agitating barrel to be directly communicated with a screw rod part of a single-screw-rod extruder; enabling all layers of uniformly-agitated mixed materials to respectively enter three single-screw-rod extrudes and enter a die head respectively by passing through a machine barrel, a filtering net device and a runner, and setting the temperature to 170-250 DEG C; after smelting the mixed materials at high temperature, blowing A-grade clean compressed air through a die and cooling by a water ring; after cooling, drawing and winding by a herringbone clamping plate. According to the raw material commixed polypropylene multilayered co-extrusion transfusion film and the production method thereof, the difficulty that accurate weighing can not be carried out when a rack of a blowing-down water cooling film blowing machine is vibrated is overcome; the weighing type blender mixer is applied to a production process of the polypropylene multilayered co-extrusion transfusion film to obtain the polypropylene multilayered co-extrusion transfusion film with an excellent comprehensive performance; an antioxidant does not need to be added again so that a PVC (Polyvinyl Chloride) transfusion film can be completely replaced.

Description

technical field [0001] The invention relates to the technical field of production methods of medical polymer film materials, in particular to a raw material blended polypropylene multilayer co-extrusion transfusion film and a production method thereof. Background technique [0002] Polyvinyl chloride, referred to as PVC, is a thermoplastic resin polymerized by vinyl chloride under the action of an initiator, and is a homopolymer of vinyl chloride. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. It has many excellent physical properties and is favored by all walks of life, and is even widely used in the fields of food and medicine. At present, people in the industry have questioned the safety of PVC infusion membranes, and PVC infusion membranes will eventually be obliged to be eliminated. [0003] At present, there have been researches on polypropylene multilayer co-extrusion infusion film, such as the patent...

AI Technical Summary

Problems solved by technology

Although the amount of antioxidants added is not large, there are still hidden dangers to the safety of the human body. Europe has strictly controlled its content

[0004] Traditionally, it is believed that mixing raw materials with a weighing type mixer will cause unstable and inaccurate weighing and uneven mixing of raw materials due to the vibration of the film blowing machine, resulting in poor transparency of the prepared infusion film. , uneven thickness, poor softness, etc., which cannot meet the technical requirements of medical infusion membranes

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