Double-layer plastic-wood composite material and preparation method thereof

Abstract

The invention discloses a two-level wood-plastic composite material and process for preparation. An inner core body of the composite material is compounded by coarse wood flour or agricultural straw powder and waste plastics. According to the percentage by weight, the coarse wood flour or the agricultural straw powder is 60-75%, and the waste plastic is 25-40%. When being combined, added coupling agent is additionally weighed and is 1-5% of the gross weight of main body materials, and lubricating agent is 0.5-5%. An outer layer is compounded by pure wood floor and novel plastic. According to the percentage by weight, the pure wood floor is 30-50%, and the novel plastic is 50-70%. When being combined, the added coupling agent is additionally weighed and is 1-5% of the gross weight of the main body materials, functional auxiliary agent is 1-5%, lubricating agent is 0.5-5%, and the thickness of the outer layer is equal or more than 3 millimeters. The process for preparing the composite material has the steps of raw material preparation, mixing granulation, extrusion molding, shaping, cooling, pulling, cutting and the like. The two-level wood-plastic composite material of the invention has the advantages of wood property and plastics property.

Description

technical field

[0001] The invention belongs to the technical field of composite materials, and relates to a double-layer plastic-wood composite material and a manufacturing method of the double-layer plastic-wood composite material. Background technique

[0002] With the continuous development of my country's modernization and the continuous improvement of people's living standards, the demand for timber is increasing day by day. The resulting over-harvesting has made vegetation resources increasingly tense and caused serious environmental problems. On the other hand, plastic products are widely used, but the waste recycling system is not perfect, and the "white pollution" caused by many people's lack of environmental awareness has become an urgent problem in environmental protection.

[0003] In this context, wood-plastic composite materials came into being. Wood-plastic composite materials are made of wood powder and agricultural straw powder filled with thermoplastics (...