Wood-plastic profiles and manufacturing method therefor

Abstract

The invention provides a wood-plastic sectional material that is synthesized by fast-growing wood veneer, corner offal of artificial boards that take the fast-growing wood as raw material and water-soluble phenol aldehyde resin adhesive and produced through production procedures of material selection-treatment-drying-gumming-gelatin-mould pressing-solidifying-post solidify. The density of the sectional material is 900-1300kg / m<3>, the hardness is 55-120MPa, the scale length is 500-5000mm, the width is 100-1300mm, the thickness is 15-200mm, 24-hour absorbing water thickness expansion rate is 0.6-3 percent and the formaldehyde release quantity is less than 1.5MG / L. The invention enhances the utilization of the fast-growing wood and the wood-plastic sectional material produced has high density and is a high quality material with the advantages of waterproof, heatproof, oil proof, age resistant, fungus resistant, chemical mediator resistant and better security, thereby being applicable to being used for making furniture, floor, decoration material, building moulding board, structure parts, motherboard of containers, track ties, and so on. The invention can also promote the utilization of the fast-growing wood and virtuous circle of the utilization of the wood, thereby having great environmental protection value.

Description

【Technical field】 [0001] The invention relates to the technical field of wood composite materials, especially the veneer of fast-growing wood—including other wood-based panel scraps using fast-growing wood veneer as raw materials, and water-soluble phenolic resin—including modified water-soluble phenolic resin Synthetic wood-plastic profiles. 【Background technique】 [0002] Wood is a primitive material widely used in people's life and industrial and agricultural production. Because of its wide use and large amount of use, more and more forests are being cut down. Although timber belongs to renewable materials, people also widely plant trees and afforestation, but the growth of trees takes time, because the growth of trees cannot keep up with people's consumption of timber, therefore, the current forest resources are less and less. [0003] The increasing scarcity of forest resources has caused people to pay considerable attention to the fast-growing species of trees, such ...

AI Technical Summary

Problems solved by technology

Among the existing technologies for using fast-growing trees, there is a reinforced wood-based panel production process in which fast-growing trees are processed into sheet materials, dried, sprayed with adhesives, stirred, and then molded, dried, and demoulded. Such as Chinese patent ZL02114510.5, high-density wooden panels can be produced with this process; however, the adhesive used in this process is polyurethane, and the high-density wooden panels produced by polyurethane as adhesive have the following defects: on the one hand, they are made High cost, including the high cost of adhesives and the excessive amount of glue used in high-density wooden boards made according to its process, reaching 16-19%; on the other hand, polyurethane adhesives have poor heat resistance and are easy to hydrolyze under high temperature and high humidity However, the bonding strength is reduced, and the terminal products made of it are easily affected by high temperature and high humidity environment. Since the board obtained from this is a high-density product, the rebound force generated by high pressure during molding is also large, and this internal stress If it exceeds the high temperature and high humidity environment, the adhesive force will be reduced, and the board will crack accordingly; on the other hand, the polyurethane adhesive contains -NHCOO-, and -NHCOO- is toxic, and it is used in end products. Once a fire occurs and other dangerous situations, which can easily cause life-threatening