Application for compatibility of WPC

Currently the world for all kinds of waste plastic pollution for a full range of governance, and has achieved some success, which is filled with flour or plant fibers , by special equipment extrusion, injection molding or pressing , in some cases can be used to replace wood products, wood products are particularly useful. The result is rapid development in recent years abroad and significant economic benefits of practical new technology can be widely used in packaging, construction and other industries, products can be made ​​of sheet metal , profiles , sheet, tubing , etc., and with the processing advantages of wood.Sellotape


Development and research of wood flour and plastic composite material can be used not only provide an opportunity to make full use of natural resources , but also can reduce the environmental pollution caused by waste plastics due , therefore , the WPC is an energy -saving , environmental protection green materials . Its wide range of applications , mainly used in building materials, automotive, packaging and transportation of goods, decorative materials and appliances, and other aspects of daily life , there are broad prospects for development . As an organic filler plastic wood flour , with many other inorganic fillers can not match the excellent performance : a wide range of sources, low cost, low density , good insulation , small abrasion on the processing equipment . But it is not as widely used as the inorganic filler , the main reasons of compatibility with the matrix resin is poor in dispersion in the molten thermoplastic poor , poor mobility , extrusion molding difficulties.

With the increasing growing demand for wood technology and environmental protection , and wood technology from a single component of mixed waste plastic and wood production and wood products , to a multi -component of mixed waste plastic and wood production and wood product transition , so many waste plastics compatibility between components becomes very important.

Since the main components of wood flour , cellulose containing many hydroxyl groups , these hydroxyl groups to form intermolecular hydrogen bonds or intermolecular hydrogen bonds , wood flour having a water absorption, moisture absorption rate of 8% to 12% , and very strong ; while most non- polar thermoplastic , hydrophobic, so that the poor compatibility between the adhesive force at the interface is small. Using appropriate additives modified polymer - the surface of wood flour , wood meal and the resin can improve the affinity and capacity of the interface , and the wood flour filler modified with enhanced properties , can be transmitted well between the filler and the resin stress , so as to achieve the effect of enhancing the strength of the composite material . Therefore, to get excellent performance, qualifying WPC , we must first solve the material compatibility issues.Washi tape


Compatibility issues mainly by adding various additives to resolve.

( A ) coupling method

Coupling agent may improve the compatibility of the inorganic filler , inorganic fiber and the matrix resin is , but also can improve the condition of the interface between the polymer and wood flour . Silane coupling agents and titanate coupling is the most widely used two types of coupling . Experimental results show that the two coupling agents can improve the filler and resin compatibility.Masking tape


( 2 ) compatibility agent law

The compatibilizer is a very simple and effective method . It is reported that an appropriate compatibilizer such as maleic anhydride -grafted or maleic anhydride-modified plant fiber of a polyolefin resin, an acrylic acid ester copolymer , ethylene- acrylic acid copolymers. Most of these compatibilizing agents containing carboxyl or anhydride groups , can react with hydroxyl groups in the esterification reaction of wood flour , wood flour reduces polarity and hygroscopic , so that it has good compatibility with the resin .Wholesale masking tape