1. The main ingredient of plastic raw materials is resin
2. Plastic raw materials: It is made of polymer synthetic resin (polymer) as the main ingredient. It can be molded into certain shape and can be molded into certain shape and shape under certain conditions. It can penetrate into various auxiliary materials or additives, has plasticity and fluidity under certain temperature and pressure. To maintain the shape of the same material.
3. Polymer: refers to the polymerization process produced by the pure material or polymer material.Natural resin or synthetic resin is a polymer polymer, referred to as polymer.
4. Plastic for electric, heat, sound with good insulation: electrical insulation, arc resistance, insulation, sound insulation, sound absorption, vibration absorption, muffler performance.
Most of the plastic raw materials extracted from some of the oil, the most familiar part of the PC material is extracted from the oil out, PC material in the burn when there is a smell of gasoline; ABS is extracted from the coal, ABS POM is extracted from the natural gas out, POM in the burn when there will be a very smell of the smell of gas.
General characteristics of plastic materials
A. Plastic materials by thermal expansion, linear expansion coefficient much larger than the metal;
B. The general stiffness of plastic raw materials lower than the metal one order of magnitude;
C. The mechanical properties of plastic materials under prolonged heating will be significantly decreased;
D. General plastic materials at normal temperature and below its yield strength of the long-term stress, there will be permanent deformation;
E. The plastic raw material is sensitive to notch damage;
F. The mechanical properties of plastic materials are usually much lower than the metal, but some composite materials than the strength and specific modulus higher than the metal, if the product design is reasonable, will play a more superiority;
General mechanical properties of reinforced plastic raw materials is the opposite sex;
H. Some plastic materials will absorb moisture, and cause size and performance changes;
I. Some plastics are flammable;
J. Fatigue data of plastic materials is still very little, need to be considered in accordance with the use requirements.
Classification of plastic raw materials
The main raw materials of plastic materials are thermoplastic and thermosetting plastics. For thermoplastic plastics, there are plastics with repeated plasticity: mainly PE / PP / PVC / PS / ABS / PMMA / POM / PC / PA And other commonly used raw materials. Thermosetting plastics mainly refers to the heating and hardening of the synthetic resin obtained in the plastic, like some phenolic plastic and amino plastic, not commonly used.
According to the scope of application, there are several common plastics such as PE / PP / PVC / PS, engineering plastics such as ABS / POM / PC / PA, etc .. In addition there are some special plastics such as high temperature and humidity resistance and corrosion resistance and other Some modified for the purpose of the special system of plastic. Material utilization and color processing
1. Most of plastic materials can be recycled, but because of the use of plastic (outlet material) than the general raw materials to be brittle, it can only be mixed with new materials (raw materials) with the largest proportion of not more than 25% is appropriate, should customer requirements Standards for the principle of various types of plastic materials due to the melting point of the different, subject to different injection pressure, the production must not be confused.
2. As the plastic products to match with the color, so the plastic raw materials can be divided into: pumping aggregates, colorants, color materials, as well as the recent emergence of the liquid in the coloring of plastic raw materials, pumping the pigment material is already mixed The raw materials, each of the plastic material has been colored, so the formation of stable and uniform color products.Color powder and color of raw materials is to use color or toner mixed raw materials, low cost, and do not store a large number of colored raw materials, but the color Unstable, more difficult to control in the production of unity.