Choosing additives suitable for wood plastic production requires comprehensive consideration of many factors. The following are some key selection points:
- Function: Improve the fluidity of materials during processing, reduce friction and heat generation, and prevent materials from adhering to the equipment.
- Selection basis: Select according to the type of plastic resin used and the processing technology. For example, for polyethylene resin, commonly used lubricants are stearic acid, paraffin, etc.; for polypropylene resin, ethylene bis stearamide has a better effect. At the same time, the processing temperature should be considered. High-temperature resistant lubricants should be selected for high-temperature processing.
- Function: Enhance the interfacial bonding between wood fiber and plastic resin and improve the mechanical properties of the product.
- Selection basis: Commonly used coupling agents are silane coupling agents and titanate coupling agents. Silane coupling agents are suitable for most plastic resins, while titanate coupling agents have better effects when processing certain specific resins. You can choose according to the specific types of resins and wood fibers.
- Function: Prevent plastic from aging due to oxidation during processing and use, and extend the service life of the product.
- Selection basis: Consider the stability, compatibility and effect of antioxidants on product color. Hindered phenol antioxidants and phosphite antioxidants are often used in combination to obtain better antioxidant effects.
- Function: Protect products from UV damage when used outdoors, prevent discoloration and performance degradation.
- Selection basis: Select appropriate anti-ultraviolet agents according to the use environment and expected life of wood-plastic products. Common anti-ultraviolet agents include benzotriazole and benzophenone.
- Function: If there is a flame retardant requirement, flame retardants need to be added to improve the flame retardant properties of the product.
- Selection basis: Select inorganic flame retardants (such as aluminum hydroxide, magnesium hydroxide) or organic flame retardants according to the flame retardant standards and the use of the product. At the same time, consider the effect of flame retardants on the mechanical properties and processing properties of the product.
- Function: Prevent wood-plastic products from growing mold in a humid environment.
- Selection basis: Choose mold inhibitors that are harmless to the human body and the environment, have a long-lasting mold-proof effect, and are compatible with other additives.
When selecting additives, the synergy and mutual influence between additives should also be considered, and the best addition amount and combination should be determined through experiments to ensure that wood-plastic products meet the expected performance and quality requirements.
Qingdao Yongte Plastic Machinery Co.,ltd. is a professional manufacturer for Wood plastic machine, we provide one-stop WPC production lines and related technical services from wood and plastic raw materials to finished products, including wood powder mills, mixers, wpc granulators, wpc profile extrusion lines, wpc door production lines and wpc sheet extrusion lines.
we supply turn-key WPC production plant includes all the machines, formulation support and technical support.
