Method for manufacturing fibrilia/polypropylene fiber composite board

Abstract

The invention relates to a method for manufacturing a composite board, in particular to a method for manufacturing a fibrilia / polypropylene fiber composite board. The invention aims at solving the problems that the fibrilia / polypropylene fiber composite board can not be manufactured by the existing extrusion molding process, and various defects in the existing hot pressing technology for manufacturing the fibrilia / polypropylene fiber composite board, such as the difficulty for evenly mixing raw materials, lowered material performance, small the proportion of the plant fiber material and increased cost. The method comprises the following steps: firstly, entwisting the rough flax fiber into long lines to obtain flax ropes; secondly, carding a polypropylene lacerated film long stripe into a filament yarn to obtain polypropylene silk yarn; and thirdly, weaving the flax ropes and the polypropylene silk yarn into pieces, performing hot pressing to the pieces after being covered by a steel plate, taking out together with the steel plate after pressure relief, and putting the pieces to a cold press for cooling and molding to obtain the fibrilia / polypropylene fiber composite board. In the invention, the dispersible uniformity of the raw material is good, the performance enhanced effect of the board is good, the highest proportion of the plant fiber material in the product is 90 percent,the consumption of polypropylene is reduced, and the production cost is reduced.

Description

technical field

[0001] The invention relates to a method for manufacturing a composite board. Background technique

[0002] Combining natural biomass fiber materials with thermoplastics to make composite materials is a good way to effectively utilize agricultural plant resources. Compared with conventional wood-based panels, this material has the advantages of high strength, aging resistance, and strong water resistance, and is suitable for various indoor and outdoor use conditions. At present, the main raw material of biomass fiber polymer composites is wood powder or wood fiber, and the main processing method is extrusion, which is similar to plastic processing. There are many limiting factors in extrusion molding. 1. Due to the limitation of equipment, the width of the extruded sheet cannot be too wide, generally not exceeding 40cm; 2. It is difficult to extrude large particle size raw materials, and plant fiber raw materials are generally in the range of 40 to 100 mesh....