Flame-proof smoke-inhibiting wood-plastic composite material

Abstract

A flame retardant smoke resistant wood plastic composite material relates to a wood plastic composite material, which solves the disadvantages of low flame retardant performance, big smoke mass, large addition of flame retardants, increased cost and decreased mechanical property of existing wood plastic composite materials. The product of the invention is mainly formed by polystyrene and / or polyvinyl chloride fortified with heat stabilizers, lignocellulose, intumescent flame retardant, compatibilizer, lubricant. The flame retardant and smoke-resistant performance of the product of the invention is greatly improved. For wood powder / polystyrene composite material, compared with no addition of flame retardant, the average heat release rate is decreased by 48 percent, the quantity of smoke yield is reduced by 30 percent and the CO yield is decreased by 28 percent during combustion. The product of the invention has high oxygen-index, long ignition time and no droplet, which greatly reduces the fire hazard of the material, and the appearance of the material is similar with wood. The product of the invention also has low cost, wide application range and good creep resistance, forming performance and mechanical property.

Description

technical field

[0001] The invention relates to a wood-plastic composite material. Background technique

[0002] Wood-plastic composites are composite materials made of wood fiber materials and plastics as the main raw materials. As a new type of engineering material, wood-plastic composite material is characterized by its excellent water resistance and corrosion resistance, insect resistance, good dimensional stability, flexible production process, and little damage to equipment. It can also use recycled waste wood and plastics. It is made from raw materials and has attracted much attention due to its advantages of being recyclable.

[0003] It is precisely because of the many advantages of wood-plastic composite materials that its market is growing rapidly, especially in construction and automotive applications. On the other hand, the rapidly expanding market has put forward higher performance requirements for the wider application of wood-plastic composite materials. F...

Examples

specific Embodiment approach 1

[0024] Embodiment 1: In this embodiment, 100-610 parts of plastic, 20-300 parts of wood fiber, 9-100 parts of intumescent flame retardant, 4.5-80 parts of compatibilizer and 0.75-20 parts of The lubricant is formed by melt blending and one-step molding; wherein the plastic is polystyrene and / or polyvinyl chloride added with heat stabilizer, and the weight ratio of polyvinyl chloride to heat stabilizer is 4-20:1; its preparation The method adopts a conventional preparation method, and the steps of the method are as follows: 1. Under the conditions of 105-150° C. and a rotating speed of 600-1000 r / min, stir the wood fiber in a high-speed mixer until the moisture content is 2-5%. . (Remove the components that are not conducive to interfacial bonding in the lignocellulosic material); 2. Add plastics, intumescent flame retardants, compatibilizers, lubricants, and heat stabilizers to the high-mixer in turn for premixing, and then mix them at 80- Under the condition of 120°C, mix in...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the flame-retardant and smoke-suppressing wood-plastic composite material consists of 200-500 parts by weight of polystyrene, 80-200 parts of wood fiber, 20-80 parts Intumescent flame retardant, 10-60 parts of compatibilizer and 5-15 parts of lubricant are formed by melt blending and one-step molding.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the flame-retardant and smoke-suppressing wood-plastic composite material consists of 300 parts by weight of polystyrene, 150 parts of wood fiber, and 40 parts of intumescent flame retardant. , 20 parts of compatibilizer and 5 parts of lubricant are formed by melt blending and one-step molding.

technical field

[0001] The invention relates to a wood-plastic composite material. Background technique

[0002] Wood-plastic composites are composite materials made of wood fiber materials and plastics as the main raw materials. As a new type of engineering material, wood-plastic composite material is characterized by its excellent water resistance and corrosion resistance, insect resistance, good dimensional stability, flexible production process, and little damage to equipment. It can also use recycled waste wood and plastics. It is made from raw materials and has attracted much attention due to its advantages of being recyclable.

[0003] It is precisely because of the many advantages of wood-plastic composite materials that its market is growing rapidly, especially in construction and automotive applications. On the other hand, the rapidly expanding market has put forward higher performance requirements for the wider application of wood-plastic composite materials. F...

Examples

specific Embodiment approach 1

[0024] Embodiment 1: In this embodiment, 100-610 parts of plastic, 20-300 parts of wood fiber, 9-100 parts of intumescent flame retardant, 4.5-80 parts of compatibilizer and 0.75-20 parts of The lubricant is formed by melt blending and one-step molding; wherein the plastic is polystyrene and / or polyvinyl chloride added with heat stabilizer, and the weight ratio of polyvinyl chloride to heat stabilizer is 4-20:1; its preparation The method adopts a conventional preparation method, and the steps of the method are as follows: 1. Under the conditions of 105-150° C. and a rotating speed of 600-1000 r / min, stir the wood fiber in a high-speed mixer until the moisture content is 2-5%. . (Remove the components that are not conducive to interfacial bonding in the lignocellulosic material); 2. Add plastics, intumescent flame retardants, compatibilizers, lubricants, and heat stabilizers to the high-mixer in turn for premixing, and then mix them at 80- Under the condition of 120°C, mix in...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the flame-retardant and smoke-suppressing wood-plastic composite material consists of 200-500 parts by weight of polystyrene, 80-200 parts of wood fiber, 20-80 parts Intumescent flame retardant, 10-60 parts of compatibilizer and 5-15 parts of lubricant are formed by melt blending and one-step molding.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the flame-retardant and smoke-suppressing wood-plastic composite material consists of 300 parts by weight of polystyrene, 150 parts of wood fiber, and 40 parts of intumescent flame retardant. , 20 parts of compatibilizer and 5 parts of lubricant are formed by melt blending and one-step molding.