A method for manufacturing recycled wood-plastic composite structural profiles

Abstract

The invention discloses a manufacturing method of a regenerated wood-plastic composite structural profile, which belongs to the technical field of polymer material processing and contains wood fiber, polyethylene resin, calcium carbonate, plasticizer, stearic acid, epoxy oil, and stabilizer. The mixture of lubricant, coupling agent and industrial white oil is fully mixed in the mixer; the mixture is added to the extrusion molding machine to gel; extruded into the mold for molding; the molded product in the mold is cooled and shaped with cooling water; The shaped products are drawn out and then cut into finished products. The wood-plastic composite structural profile produced by adopting the raw material formula and process of the present invention is superior to other similar products in terms of appearance quality and physical and chemical properties.

Description

Technical field: [0001] The invention belongs to the technical field of polymer material processing, and in particular relates to a manufacturing method of recycled wood-plastic composite structural profiles. Background technique: [0002] As we all know, my country is a country with poor timber resources, and the forest coverage rate is only 2.7%. However, with the rapid development of economy, my country's demand for timber is increasing day by day. As the largest country in my country, the import volume of timber has been far greater than its export volume, so the disharmony between the possession of timber resources and the rapid economic development has become increasingly prominent, and the huge gap in the domestic timber market will exist for a long time. [0003] Wood-plastic composite profile is a new type of material developed in recent years. This material combines the properties and advantages of wood and plastic. Products can replace wood and plastic, and more im...

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Problems solved by technology

[0004] The heat resistance of wood fiber is poor. In the process of preparing wood-plastic composite materials, it often needs to be carried out at a high temperature above 100 degrees. If the heat resistance problem of wood fiber is not well solved, wood fiber is easy to It is carbonized, so that the wood fiber cannot perform its functions in the polymer, so the physical and mechanical properties of the final product are greatly reduced, which affects its wide application

[0005] For example, the application number is: 90102639.5, and the Chinese patent titled "Wood-Plastic Composition" has not really solved the problem that wood fibers are easily carbonized, so its products have not been practically applied.

Another example is a Chinese patent called "Wood Powder Filled PVC Products" (Application No. 00219935.2) and a Chinese patent on "Wooden Plastics" (Application No. 94113968.9), all due to failure to solve the heat resistance of wood powder problem, but failed to be promoted

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