Method for fabricating composite building board from wood based cotton stalk

Abstract

The invention relates to a method for manufacturing a wood-based cotton straw composite wood-based panel. By controlling the cutting length of the straw at 1.5-2.5cm, and controlling the moisture content at 15-20% when shaving the shavings, and then strictly controlling the moisture content at 15-20% when shaving, the addition of wood shavings and fibers can be Between 0-100%, determine the 1:3-3:1 mixing ratio of wood shavings and fibers, the hot-pressing temperature in hot-pressing is 140-200°C, the hot-pressing pressure is 2.5-4MPa, and the hot-pressing time is 15-30 seconds / mm; thus, cotton stalks can be fully utilized to alleviate the shortage of wood resources, maintain ecological balance, protect the environment, and reduce the manufacturing cost of particleboard and fiberboard products by 10-20%.

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.

Images