With the continuous development of industrial manufacturing technology and plastic modification technology, replacing steel with plastic has formed a trend in automobile manufacturing, mobile office and home furnishing industries. Many traditional metal parts are gradually being replaced by high-performance plastics. Continuous fiber reinforced thermoplastic composite materials have been popularized in many fields such as automobile industry, aerospace, military industry, electronics, etc. due to their light weight, high rigidity, and high toughness, and they have great market application space.
1. Introduction to continuous fiber reinforced thermoplastic composite materials
Continuous Fibre Reinforced Thermoplastics (Continuous Fibre Reinforced Thermoplastics, CFRTP for short) refers to a new type of high-strength, high-rigidity, and high-toughness composite material that uses continuous fiber as a reinforcing material and a thermoplastic resin as a matrix, and is manufactured through a special process:
Resin matrix: Most thermoplastic resins can be used as the matrix of CFRTP, from general-purpose resin PP/PE/PVC to special resin PPS/PEEK, etc. can be selected according to the performance and cost of the material.
Reinforcing fiber: glass fiber, carbon fiber, aramid fiber, plant fiber, basalt fiber, etc. Among them, the resin matrix endows CFRTP with excellent mechanical properties, thermal properties, chemical resistance and easy processing properties, and the reinforcing fiber mainly determines the mechanical properties of the composite material.
Advantages of CFRTP:
1) The prepreg can be stored for a long time;
2) It has excellent comprehensive performance, especially it can maintain good mechanical properties under high temperature and high humidity;
3) There are many molding methods and high production efficiency;
4) Products can be repeatedly processed and recycled.
Since its development in the early 1970s, CFRTP has received more and more attention from various countries, and its development speed has been rapid; my country has also carried out CFRTP research and development since the mid to late 1980s, but compared with developed countries, the gap is still large and it is currently at a rapid pace. progression stage. The continuous fiber-reinforced thermoplastic composite material industry has a high degree of concentration, extremely high technical barriers, and huge capital investment. There are only a handful of companies in the world that truly have continuous fiber-reinforced thermoplastic composite material research and development and large-scale production capabilities:
Foreign companies: SABIC, DSM, Evonik, Arkema, Solvay, LANXESS, Covestro, Teijin, Evant, DuPont, BASF, Toray, etc.
Domestic companies: Kingfa Science and Technology, Pulit, Jiangsu Qiyi, Changhai Co., Ltd., China General Nuclear Power Juner, Jieshijie, etc.
2. Application of continuous fiber reinforced thermoplastic composite materials
At present, continuous fiber-reinforced thermoplastic composite materials have made considerable progress in many markets, such as aerospace, transportation, sports equipment, industrial supplies, and bulletproof materials. In recent years, continuous fiber reinforced thermoplastic composite materials have begun to be applied in the fields of consumer electronics, reinforced pipes, and new energy vehicles such as notebook computer casings, replacing metal materials to achieve the purpose of lightweight.
Among the alternative materials in the automobile lightweight trend, CFRTP has lower density, higher strength, wear resistance, heat resistance, corrosion resistance, and higher cost performance. It can be used to manufacture automobile structural parts, interior parts, etc.
2. Consumer electronics
CFRTP can be used in mobile phones, laptops, and earphone shells. It is lighter than traditional magnesium-aluminum alloys and has the same good bending and torsion stiffness as metal materials.
3. Shoe materials
CFRTP has high strength, light weight, excellent torsion resistance and high stability, and can be used in shoe midsoles, midfoot support sheets and toe caps.
4. Other consumer goods
CFRTP can be used in helmets, trolley cases, sports equipment accessories and other fields due to its high impact resistance and fast forming characteristics.