Continuous long fiber reinforced polyolefin plastic wood composite material and preparation method thereof

Abstract

The invention relates to a plastic wood composite material and a preparation method and a co-extrusion die thereof, in particular to a continuous long fiber reinforced polyolefin plastic wood composite material and a preparation method thereof. The composite material consists of the following components in percentage by weight: 20 to 80 percent of polyolefin plastic, 0 to 80 percent of wood fiber, 0 to 80 percent of mineral filler, 0 to 10 percent of lubricating agent, 0 to 5 percent of antioxidant, 0 to 5 percent of ultraviolet absorbent, 0 to 10 percent of coupling agent, 0 to 10 percent of pigment and 0 to 30 percent of reinforcing fibers; the reinforcing fibers are surface modified or unmodified glass fibers, jute fibers or hemp palm fibers; and the reinforcing fibers are continuously extended along the length direction of the polyolefin plastic wood composite material, and the number of the reinforcing fibers is at least one beam. The reinforcing fibers are continuously extended and distributed in the polyolefin plastic wood profile; and when the plastic wood profile is forced during use, the continuous extended fibers can quickly transfer the local force to the whole profile so as to greatly improve the strength and the impact resistance of the plastic wood profile.

Description

technical field [0001] The invention relates to a wood-plastic composite material and a preparation method thereof, in particular to a continuous long fiber reinforced polyolefin wood-plastic composite material and a preparation method thereof. Background technique [0002] Wood-plastic composite material is an emerging environmentally friendly, low-carbon composite material. It mainly uses recycled plastics and agricultural and forestry wastes as raw materials, which are processed into planks, guardrails, or indoor and outdoor decorations. However, due to the low mechanical properties of wood-plastic composite materials, they cannot be widely used in the construction field, especially for force-bearing parts or structural parts. [0003] There have been many reports and related patents on fiber-reinforced plastics at home and abroad, but the distribution of glass fibers in the product is a discontinuous phase, and the product is still partially stressed when it is stressed...

AI Technical Summary

Problems solved by technology

However, due to the low mechanical properties of plastic-wood composites, they cannot be widely used in the construction field, especially for force-bearing or structural parts.

[0003] There have been many reports and related patents on fiber-reinforced plastics at home and abroad, but the distribution of glass fibers in the product is a discontinuous phase, and the product is still under local force when it is stressed.

For example, long glass fiber reinforced polypropylene material and its preparation method (Application No.: 200810020936.5) are used after impregnating long glass fiber in polypropylene and cutting into pellets. The disadvantage is that the glass fiber is still in a discontinuous state, and the reinforcing effect on the product is relatively Due to the poor reinforcement of continuous fibers, the glass fibers will continue to be sheared during the subsequent processing of the product, and at the same time, there will be wear and tear on the processing equipment

In addition, ordinary glass fiber reinforced materials are difficult to recycle, and glass fibers are difficult to separate from the material