PVC co-extrusion exterior wall cladding and preparation method thereof

Abstract

The invention discloses a PVC co-extrusion exterior wall cladding and a preparation method thereof. The PVC co-extrusion exterior wall cladding comprises a PVC foaming layer, wherein the PVC foaming layer comprises the following components in parts by weight: 30-40 parts of PVC resin, 23.5-33.5 parts of modified montmorillonite, 15-23 parts of modified magnesium-aluminum hydrotalcite, 30-40 partsof calcium carbonate, 1.4-1.8 parts of a compound stabilizer, 1.5-1.9 parts of a plasticizer, 1.5-1.9 parts of a foaming regulator, 0.3-0.7 part of a coupling agent, 0.25 to 0.45 part of a foaming agent, 0.3 to 0.7 part of stearic acid, 0.2 to 0.4 part of polyethylene wax and 0.1 to 0.3 part of paraffin; the composite stabilizer comprises the following components: lead sulfate tribasic, methyltinmercaptide, phosphite ester, rare earth malate and an arylamine antioxidant. The PVC co-extrusion exterior wall cladding has the advantages of good thermal stability, adsorption and degradation of automobile exhaust, sound absorption and noise reduction, antistatic and dust adsorption.

Description

technical field [0001] The invention relates to the technical field of plastic processing, and more specifically relates to a PVC co-extruded exterior wall hanging board and a preparation method thereof. Background technique [0002] Boards are widely used in the construction and decoration industry, and are often called building boards, wood boards, furniture boards, engineering boards, wood boards, etc. According to the classification of materials, the boards can be divided into two categories: solid wood boards and wood-based boards. In the past, wooden boards were used in large quantities. With the reduction of forest resources and the enhancement of environmental protection awareness, replacing wood with plastic has become the development direction of boards in our country. [0003] PVC exterior wall hanging board is a plastic profile with rigid polyvinyl chloride as the main body. It is the best alternative material for exterior wall coatings and ceramic tiles. It is ...

AI Technical Summary

Problems solved by technology

[0005] The existing PVC co-extrusion foam board adds plant fiber powder to the raw material, and the PVC foam board obtained has the lightness and toughness of fiber, and has good weather resistance, high strength, no water absorption, no cracking, and long life. , good apparent quality, etc., but because the PVC resin molecular chain contains unstable groups such as allyl chloride, tertiary chlorine, and secondary chlorine, the thermal stability of the PVC molecule is poor and it is easy to decompose. The extruded foam board uses calcium / zinc heat stabilizers to increase the thermal stability of PVC resin. Although calcium / zinc heat stabilizers are non-toxic, low in price, and good in lubricity, their long-term thermal stability is not ideal, and calcium / zinc Most of the heat stabilizers are liquid and only used for soft products. For hard products, their thermal stability is not enough

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