A kind of ultra-long processing cycle rigid high-transparent PVC mixed pellets suitable for the production of extruded products

Abstract

The invention relates to an ultra-long processing period hard highly-transparent PVC mixing granule for extrusion type product production, wherein the ultra-long processing period hard highly-transparent PVC mixing granule comprises 100 parts of a polyvinyl chloride resin having a polymerization degree of 700 (VCM is less than or equal to 3 PPM, VOC is less than or equal to 0.05%), 4.0-10.0 parts of MBS (VOC is less than or equal to 0.05%), 1.2-2.0 parts of methyltin mercaptide (VOC is less than or equal to 0.02%), 0.5-1.4 parts of pentaerythritol stearate (VOC is less than or equal to 0.03%), 0.5-1.0 part of a stearic acid and oxidized polyethylene wax mixture (VOC is less than or equal to 0.03%), 0.3-1.0 part of tris(2,4-di-tert-butylphenol)phosphite (VOC is less than or equal to 0.08%), 1.0-5.0 parts of dioctyl phthalate or dioctyl terephthalate (VOC is less than or equal to 0.08), and trace violet blue pigment. With the ultra-long processing period hard highly-transparent PVC mixing granule of the present invention, the extrusion processing period of the extrusion type highly-transparent PVC mixing granule can be effectively prolonged.

Description

technical field [0001] The invention relates to a rigid and highly transparent PVC mixed pellet, in particular to a rigid and highly transparent PVC mixed pellet with a super-long processing period suitable for the production of extruded products, belonging to the technical field of plastic pellet production and processing. Background technique [0002] As a general-purpose plastic, PVC resin (polyvinyl chloride) is widely used in various food packaging, pharmaceutical packaging, cosmetic packaging, household appliance packaging, auto parts, and chemical materials due to its relatively low price and ease of processing after modification. , architectural decoration building materials, fire equipment accessories, sanitary ware, supermarket shelves and other fields. [0003] Polyvinyl chloride is a kind of strong polar polymer with strong intermolecular forces. It needs to be heated to a certain temperature to show its plasticity. Hard and highly transparent PVC materials can u...

AI Technical Summary

Problems solved by technology

However, a technical bottleneck that exists today is: due to the addition of the above-mentioned various additives and the influence of the quality of PVC itself, it will have a greater impact on the extrusion processing cycle of high-transparency PVC mixed pellets. For high-transparency PVC mixtures, the production and processing cycle generally does not exceed 72 hours, because after the production cycle exceeds 72 hours, the surface of the finished product will have obvious wire drawing phenomenon, which will affect the transparency and surface gloss of the product, or form sticky on the surface of the die. The powdery precipitate attached to the inner wall of the mold caused scorching of the inner part of the screw and had to be shut down to remove the mold. After cleaning, reheat and reheat the machine before starting the machine.

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