Environmental-protection high-performance wood-plastic composite

Abstract

The invention discloses an environmental-protection high-performance wood-plastic composite, which comprises the following components in mass percent: 35-65 percent of surface-modified wood fiber, 5-30 percent of asbestos fiber, 25-50 percent of polyethylene plastic, 2-10 percent of unsaturated polyester resin adhesive solution, 2-10 percent of red phosphorus, 0.5-3 percent of mildew-proof additive, 0.5-3 percent of anti-wear additive, 1-10 percent of char-forming agent, 2-8 percent of foaming agent, 2-7 percent of assistant agent and 1-3 percent of dye. The proper fire resistance, the proper waterproofness, the proper abrasive resistance and the proper antibacterial property of the wood-plastic composite are improved through adding the assistant agent and the like, and therefore, the application field of the wood-plastic composite is also broadened while the performance of a traditional wood-plastic composite is improved.

Description

technical field [0001] The invention relates to the field of wood-plastic composite materials, in particular to a high-performance wood-plastic composite material. Background technique [0002] Wood-plastic composite (WPC) is prepared by compounding thermoplastics and wood fibers or plant fibers. This material has the dual characteristics of wood and plastics. High abrasiveness and impact resistance, the product can be recycled. However, due to the different surface properties of the plant fiber and the resin matrix, the interface bonding effect is poor when the two are combined, which leads to the reduction of various properties of the composite material and affects the popularization and application of the composite material. Existing materials that use non-polar or low-polar thermoplastics as base materials and wood raw materials, such as polyethylene, polypropylene, polyvinyl chloride and polystyrene, and their recycled materials, the wood-plastic composite material Th...

AI Technical Summary

Problems solved by technology

However, due to the different surface properties of the plant fiber and the resin matrix, the interface bonding effect is poor when the two are combined, which leads to the reduction of various properties of the composite material, which affects the popularization and application of the composite material.

Existing materials that use non-polar or low-polar thermoplastics as base materials and wood raw materials, such as polyethylene, polypropylene, polyvinyl chloride and polystyrene, and their recycled materials, the wood-plastic composite material The tensile strength is between 30MPa and 40MPa, and the tensile modulus is between 80MPa and 120MPa, so the mechanical strength is relatively low, and due to the poor compatibility between thermoplastics and highly polar wood materials, the interface interaction force is weak. Under the conditions of temperature and humidity changes, the plastic / wood interface is prone to damage. Therefore, wood-plastic composite products based on thermoplastics are prone to creep deformation under the action of internal stress or external load, so that the product is distorted, The quality is reduced or even the product parts are damaged; when the temperature and humidity in the environment where thermoplastics are used as the base material change significantly, the polymer / wood interface in the wood-plastic composite will be separated or destroyed, making the mechanical properties of the wood-plastic composite The performance is further reduced, which limits the application range of the material. It is mainly used in non-structural materials such as home decoration, pallets, landscapes, planks, railings, etc., and it is difficult to meet the application requirements in the field of structural materials and engineering materials.