Rigid PVC high foam board formula and manufacturing method thereof

Abstract

A rigid PVC high foam board formula and a manufacturing method thereof are provided; the formula comprises the components by weight: 30-50 parts of PVC resin, 25-40 parts of calcium carbonate, 15-30 parts of a talc powder, 15-40 parts of aluminum hydroxide, 1-6 parts of a heat stabilizer, 1-15 parts of crystal whiskers, 1-5 parts of a flame retardant, 0.1-5 parts of a crosslinking agent, 5-20 parts of a foaming agent I, 0.5-5 parts of a foaming agent II, 0.1-1 part of a foaming regulator, and 80-120 parts of a solvent. The manufacturing method comprises the steps: selecting the raw materials according to the formula, putting all the powder raw materials into a kneading machine, kneading, and adding a solvent; carrying out a foaming reaction of the mixture after kneading, after the reaction is completed, taking out a foam board, and putting the foam board into a hot air circulation oven, to obtain target foaming ratio; then sending the foam board into an oven room, heating, and removing the solvent; and cutting, processing and detecting according to the requirements, and thus obtaining the finished product. The hardness and the foaming rate of the PVC foam board are greatly improved, and the problem that conventional PVC has no rigid high foam board materials in China is solved.

Description

technical field [0001] The invention relates to a formula for a PVC foam board and a manufacturing method thereof, in particular to a formula suitable for a rigid PVC high foam board and a manufacturing method thereof. Background technique [0002] At present, the market of China's external wall thermal insulation system has just started, and the standards are not yet perfect, and there are many problems, the most prominent problem is the fire resistance level of thermal insulation materials. In terms of thermal insulation materials in my country, inorganic materials whose combustion materials can reach Class A only account for less than 10% of the market share, and their thermal insulation performance cannot be compared with many organic materials, and materials whose combustion materials can reach Class B1 account for less than 20% % market share, and its price is expensive. More than 70% of the rest are cheap combustible and flammable materials (polyurethane, polystyrene ...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the current production problem of rigid PVC high-foaming board, provides a formula and a manufacturing method of rigid PVC high-foaming board, obtains a rigid PVC high-foaming board with high hardness and high foaming ratio, It solves the problems that the current domestic PVC rigid foam board has low foaming ratio and low hardness of PVC high foam board and cannot be used as external wall insulation materials. It is cheap and can replace expensive and flammable polyurethane, polystyrene and other foam insulation materials.