Several common plastic modification technologies.

Several common plastic modification technologies:

(1) Fiber reinforced. Long fiber reinforced thermoplastic (UCRT) is a new lightweight and high strength engineering structural material, because of its light weight, low price, easy recovery and reuse, the application in the automobile is developing very fast. The use of natural fibers, such as linen and sisal, to make car body parts has been recognized in the automotive industry.

(2) Toughening technology. The stiffness (including strength) and toughness of polymer structural materials are the two most important indicators of interaction. Therefore, the study of strengthening and toughening at the same time is a difficult problem in polymer materials science. And the successful development of nano CaCO3 plastic toughening master batch and its preparation technology, has effectively solves the two difficult problems faced by the same research field both at home and abroad.

(3) Filling modification (powder filling). Plastic filling modification, because of its low price, excellent product performance, and improve some physical properties of plastic products, can replace synthetic resin, and simple production process, less investment, has significant economic and social benefits.

(4) Blending modification. Plastic blending modification refers to the incorporation of one or more other resins (including plastics and rubber) in a resin to achieve a modification of the properties of the original resin. Almost all of the properties needed for plastics can be obtained by blending modification.

(5) Flame retardant technology. Generally speaking, polymer flame retardant technology can be divided into two types: adding type and reactive type, mainly adding type. That is, a flame retardant is added to the common granular material and mixed thoroughly in the mixer. and then into the twin-screw extruder-based mixing device to re-granulation, preparation of flame retardant modified "flame retardant plastic".

(6) Graft modification. At present, graft modified plastics are widely used as macromolecular coupling agents, compatibilizer and toughening agents. The properties of graft modified polymers are related to the physical and chemical properties of the graft, and also to the content of the graft and the length of the grafted chain. The crystallinity and melting point of grafted PP decreased with the increase of graft content, while transparency and low temperature heat sealing increased.

(7) Conductive functional modification. The development of composite conductive polymer materials mainly focus on two aspects: reducing resistivity and improving the comprehensive properties of materials. The blending modification of polyolefin with POE showed better toughening effect than that of traditional elastomer. Thermoplastic elastomer. Thermoplastic elastomer (TPE) combines the repeatability of thermoplastics and the high elasticity of rubber and other physical and mechanical properties, at the same time, it has excellent recovery and regeneration. As a new polymer material market, it has developed rapidly. Thermoplastic elastomers have very wide range of product adaptability.