Preparation method for degradable wood-plastic board

Abstract

The invention discloses a preparation method for a degradable wood-plastic board. The preparation method comprises the following preparation steps: weighing bamboo charcoal microparticles, biologicalstraw powder, modified diatomite and glass fiber, adding NaOH, carrying out soaking for 12 to 24 hours, carrying out filtering to remove a solution, carrying out washing, adding deionized water, carrying out mixing under stirring, and carrying out dissolving so as to obtain a mixed base material A; weighing a degradable modified starch binder, adding a composite stabilizer, and placing an obtainedmaterial into a heating kettle at 60 to 85 DEG C, and carrying out a reaction for 2 to 4 h so as to obtain a mixed base material B; and mixing the mixed base material A with the mixed base material Bunder stirring at a stirring rate of 500 to 600 r / min at 80 to 130 DEG C, carrying out stretching, forging and extrusion, wherein the stress of extrusion is 300 to 400 N / cm<2>, introducing argon as acarrier, filling a pressurized mixture with calcium carbonate at a pressure of 1.5 to 2.0 KPa, and carrying out cooling to a room temperature so as to obtain a product. According to the invention, the modified starch binder is adopted; starch is a cheap and renewable natural polymer material and has the advantages of no toxicity, easy biodegradability and excellent environmental friendliness; thus, the starch is modified to meet the requirements of the wood-plastic board for strength, water resistance and mildew resistance in the process of application.

Description

technical field [0001] The invention relates to the field of wood-plastic panels, and more specifically relates to a preparation method of degradable wood-plastic panels. Background technique [0002] Wood-plastic composite board is a kind of wood (wood cellulose, plant cellulose) as the basic material, thermoplastic polymer material (plastic) and processing aids, etc., which are mixed evenly and then heated and extruded by mold equipment. It is a high-tech green and environmentally friendly new decorative material, which has the properties and characteristics of wood and plastic. It is a new type of composite material that can replace wood and plastic. Good rigidity and toughness, can be nailed, drilled, ground, sawed, planed, painted, and not easily deformed, anti-crack; The market's recognition is low, and because it contains more plastic materials, it is non-degradable and has caused a certain burden on the environment. However, the density board that is more popular on...

AI Technical Summary

Problems solved by technology

[0002] Wood-plastic composite board is a kind of wood (wood cellulose, plant cellulose) as the basic material, thermoplastic polymer material (plastic) and processing aids, etc., which are mixed evenly and then heated and extruded by mold equipment. It is a high-tech green and environmentally friendly new decorative material, which has the properties and characteristics of wood and plastic. It is a new type of composite material that can replace wood and plastic. Good rigidity and toughness, can be nailed, drilled, ground, sawed, planed, painted, and not easily deformed, anti-crack; The market's recognition is low, and because it contains more plastic materials, it is non-degradable and has caused a certain burden on the environment. However, the density board that is more popular on the market is also called fiberboard, which is made of wood fiber or other plants. The man-made board made of fiber as raw material and applied with urea-formaldehyde resin or other suitable adhesives, the urea-formaldehyde resin is easy to emit more harmful gases of aldehydes, which has a certain impact on the indoor air. In addition, the natural degradation time of urea-formaldehyde resin is long and also There is an environmental pollution problem of waste materials