Composite halogen-free flame-retardant smoke suppression agent of PVC wood-plastic composite material and preparation method and application of agent

Abstract

The invention relates to a composite halogen-free flame-retardant smoke suppression agent of a PVC wood-plastic composite material and a preparation method and application of the agent, which relate to the composite halogen-free flame-retardant smoke suppression agent and the preparation method and application of the agent, and aim at solving the problems that the PVC wood-plastic composite material is combustible, a great amount of smoke is produced when the composite material is combusted, the addition amount of the existing PVC wood-plastic composite material flame-retardant smoke suppression agent is large, the flame-retardant effect and the smoke suppression effect are poor, and the existing PVC wood-plastic composite material flame-retardant smoke suppression agent is harmful to the health of people. The composite halogen-free flame-retardant smoke suppression agent consists of ammonium polyphosphate, melamine, pentaerythritol and copper oxide. The preparation method comprises the following steps: I, preparing an expansion-type flame-retardant agent; II, preparing the composite halogen-free flame-retardant smoke suppression agent. The application method comprises the following steps: I, weighing raw materials; II, preparing high-temperature materials; III, preparing a premix; IV, extruding and forming. The flame-retardant smoke suppression agent solves the problems that the wood-plastic composite material is combustible, a great amount of smoke is produced when the composite material is combusted, the addition amount of the existing flame-retardant smoke suppression agent is large, the effect is poor, and the existing flame-retardant smoke suppression agent is harmful to the health of people. The composite halogen-free flame-retardant smoke suppression agent is used for resisting the combustion and suppressing the smoke of the PVC wood-plastic composite material.

Description

technical field [0001] The invention relates to a flame-retardant and smoke-suppressing agent for PVC wood-plastic composite materials, a preparation method and application thereof, and is especially suitable for flame-retardant and smoke-suppressant of PVC wood-plastic composite materials with a wood fiber content of 30% to 70%. Background technique [0002] Wood-plastic composite materials are lignified fiber materials such as wood, bamboo, crop straw and processing residues, whose main chemical components are cellulose, hemicellulose and lignin) and plastics (such as polyethylene, Polypropylene, polystyrene, polyvinyl chloride and other thermoplastic polymers) are composite materials made of raw materials. PVC wood-plastic composite material is one of its main varieties. Due to its good processing performance, mechanical properties and price advantages, especially the excellent wood feeling, the application field of PVC wood-plastic composite materials is constantly expa...

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Problems solved by technology

[0012] The present invention aims to solve the problem that PVC wood-plastic composite materials are combustible, a large amount of dense smoke is generated by combustion, the existing PVC wood-plastic composite materials have a large amount of flame-retardant and smoke-suppressing agents, poor flame-retardant and smoke-suppressing effects, and the existing halogen-based flame retardants, Lead salt flame retardants and other harmful problems to the environment and people's health, provide a PVC wood-plastic composite material composite halogen-free flame retardant smoke suppressant and its preparation method and application

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