Five-layer co-extruded fiber felt reinforced plastic composite board and manufacturing method thereof

Abstract

The invention relates to the field of film or sheet products produced by plastic or plastic state substance, in particular to a five-layer co-extruded fiber felt reinforced plastic composite board. The five-layer co-extruded fiber felt reinforced plastic composite board is composed of plastic layers and fiber felts and is characterized in that there are three plastic layers and two fiber felts, the three plastic layers are respectively arranged in parallel, the three plastic layers are respectively a top layer, an intermediate layer and a bottom layer, a layer of fiber felts is respectively lined between the top plastic layer and the intermediate plastic layer and between the intermediate plastic layer and the bottom plastic layer, and the plastic layer is prepared from any one of polypropylene, polyethylene and rigid polyvinyl chloride. The five-layer co-extruded fiber felt reinforced plastic composite board provided by the invention is high in strength, low in density, good in weather resistance and wide in range of application.

Description

technical field [0001] The invention relates to the field of film or sheet products produced from plastic or materials in a plastic state, in particular to a five-layer co-extruded fiber mat reinforced plastic composite board and a manufacturing method thereof. Background technique [0002] At present, plastic panels are generally divided into single-layer plastic panels, three-layer and five-layer plastic composite panels. The single-layer board is produced by direct extrusion of polypropylene, polyethylene, rigid polyvinyl chloride and other materials, or it can be mixed with inorganic flake or granular materials and polypropylene, polyethylene, rigid polyvinyl chloride and other materials through a single screw Extruder melt extrusion production. Three-layer and five-layer plastic composite panels are generally produced by melting and co-extruding one or two layers of glass fiber mesh, geotextile and two or three layers of plastic through two or three single-screw extrud...

AI Technical Summary

Problems solved by technology

The single-layer pure plastic plate has low tensile strength, bending strength, flexural modulus, and thermal deformation temperature, and a large linear expansion coefficient. For example, the tensile strength of polypropylene sheet is 24MPa, the flexural strength is 20MPa, and the flexural modulus is 20MPa. is 800MPa, and the coefficient of linear expansion is 1.5×10 -4 mm / m·℃, unable to meet the requirements of high strength, high modulus, and low expansion that must be possessed by structural load-bearing materials

This kind of plastic board is used in building templates, and there are the following problems: the strength and rigidity are too small; the load capacity is low; the thermal expansion and contraction coefficient is large;

However, because of its lack of water resistance, it is easy to cause swelling, cracking, delamination and other problems when used in an environment in contact with water, and because it cannot be recycled and reused, it causes waste of resources such as wood.

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