Manufacturing method for wood-based cotton stalk composite artificial board

Abstract

The invention provides a manufacturing method for a wood-based cotton stalk composite artificial board. The manufacturing method is characterized by comprising the following steps that firstly, cotton stalks are cut off, the water content of the cotton stalks is controlled to be within 15-20%, and then the cotton stalks are cut into small sections 1.5-2.5 cm long; secondly, hot grinding is carried out, particularly, the cotton stalks cut as needed and wood strips are subjected to hot grinding and pulping through two hot grinding machines, and the pulping condition of the cotton stalks is that the steam pressure is 2-5 kg/cm<2>; thirdly, glue is applied and dried, gluing and drying are carried out synchronously after hot grinding, and water-proofing agents are added at the time; the applied glue amount and the applied water-proofing agent number of the cotton stalks are 10-14% and 1-2% respectively, the applied glue amount and the applied water-proofing agent number of wood fibers are 8-12% and 0.5-1% respectively, and the water content of the fibers with glue applied is 8-12% through drying; fourthly, laying is carried out, the dried mixed materials with the glue applied are laid into a board blank with the required thickness; fifthly, hot pressing is carried out, the hot pressing temperature is 140-200 DEG C, the hot pressing pressure is 2.5-4 MPa, and the hot pressing time is 15-30 second/mm; and sixthly, edges are cut, and another kind of fiber board product is formed.

Description

technical field [0001] The invention relates to a method for manufacturing a wood-based cotton straw composite wood-based panel. Background technique [0002] Cotton stalks are the residues of cotton production. About 20 million tons of cotton stalks are produced in my country every year and are mainly used as fuel. A large amount of cotton stalks has not been efficiently utilized. Cotton straw is mainly composed of cellulose, hemicellulose and lignin, similar to the chemical composition of hardwood. Due to the current shortage of wood resources in our country, the raw materials for the production of fiberboard and particleboard in the wood-based panel industry are in short supply. Therefore, if cotton straw can be used in the production of wood-based panels, it will not only solve the problem of shortage of wood raw material resources in the wood-based panel industry in our country, but also provide cotton. The high-efficiency utilization of straw has found a way out and i...

AI Technical Summary

Problems solved by technology

But then they stopped production one after another, and changed to use wood as raw material again, mainly because the related technology did not solve the problem.

There are two main technical problems: one is that the sheath of cotton stalks containing a large amount of bast fibers is not easy to cut off when planing and shavings to form hemp-like fiber clusters, which not only block equipment and transportation pipelines, but are also prone to fire and sizing. Second, the water absorption thickness expansion rate of particleboard and fiberboard produced from cotton straw is difficult to meet the requirements. The above two main technical problems have resulted in no wood-based panel enterprise using cotton straw as raw material in my country.