Flame-retardant smoke-suppression cabo powder based wood-plastic composite material and preparation method thereof

Abstract

The invention discloses a flame-retardant smoke-suppression cabo powder based wood-plastic composite material and a preparation method thereof, and is characterized in that the preparation method comprises the steps as follows: soaking cabo in an alkali-water solution, of which the temperature is 10 to 80 DEG C and the concentration by weight percentage is 1 to 40 percent, until the cabo is flavorless or the smell of smoke is week, filtering, drying until the moisture content by weight percentage is not greater than 5 percent, and then crushing the cabo into cabo powder with the granularity of 60 to 100 meshes; mixing the following raw materials by part by weight: 50 to 70 parts of cabo powder, 20 to 35 parts of plastic, 0.3 to 0.5 parts of coupling agent, 5 to 10 parts of filling agent, 4 to 12 parts of surface finishing agent, 0.2 to 0.4 parts of antioxygen and 3 to 10 parts of N-P flame retardant; and granulating the mixture through a double-screw extrusion molding granulator, and then carrying out extrusion shaping to the mixture through a tapered double-screw finished product extruding machine. The obtained cabo powder based composite material is greater than or equal to 27 in oxygen index, and has a low cost, a wide range of application, strong creep deformation resistance, and good mechanical properties and formability.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic composite materials, in particular to tobacco stem powder-based wood-plastic composite materials of flame-retardant and smoke-suppressing type and a preparation method thereof. Background technique [0002] Wood-plastic composite material is a structural profile formed by mixing plastic (mainly polyethylene, polypropylene or polyvinyl chloride) with plant fiber powder and additives in a certain proportion and then extruded at high temperature. It has a wooden appearance and high surface hardness. , strong wear resistance, good aging resistance, can be processed twice, and has the characteristics of waterproof, anti-corrosion, anti-moth, anti-freeze and so on. Due to the many advantages of wood-plastic composite materials, it has been widely used in outdoor garden floors, fences, interior decoration, building templates, logistics consumables and automotive decoration materials. [0003] The c...

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Problems solved by technology

Since plant fiber powder and waste plastics are flammable substances, their application is greatly restricted

[0004] Chinese Patent Application No. 200910072237.x discloses a flame-retardant wood-plastic composite material and its preparation method, by adding melamine pyrophosphate or melamine polyphosphate flame retardant to achieve the effect of flame retardancy and smoke suppression, but this type Flame retardants are more expensive, making them more costly

[0005] Chinese Patent Application No. 200710072794.2 discloses a method for preparing a flame-retardant and smoke-suppressing wood-plastic composite material. The effect of flame-retardant and smoke-suppressing is achieved by adding an intumescent flame retardant mixed with ammonium polyphosphate and starch in a certain proportion. It only mentioned that the creep resistance, formability and mechanical properties are good, but did not clearly give the performance test data of the prepared wood-plastic composite material

[0006] Chinese Patent Application No. 200610039985.4 discloses a flame-retardant wood-plastic composite material and its preparation method. Although a certain flame-retardant effect can be achieved by adding a large amount of ammonium polyphosphate, the mechanical properties of the wood-plastic composite material will be greatly reduced. seriously affect its scope of application

[0007] Chinese Patent Application No. 200510011207.x discloses a method for producing flame-retardant composite foamed pellets for wood-plastic products, which utilizes the flame-retardant characteristics of polyvinyl chloride itself to make the prepared wood-plastic composite material have certain flame retardancy. However, the problem of a large amount of smoke generated by the burning of polyvinyl chloride has not been solved, and the effect of suppressing smoke cannot be achieved.

The current treatment methods for tobacco stems are incineration and burial, but after all, it is also a kind of natural plant fiber. The current treatment method not only wastes resources, but also pollutes the environment.

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