Is it harmful to the human body to make plastic products?
Characteristics of general plastic raw materialsA. plastic raw material expands when heated, and the coefficient of linear expansion is much larger than that of metal;B. the rigidity of general plastic material is lower than that of metal;The mechanical properties of C. plastic material will decrease obviously when heated for a long time;D. general plastic raw material at normal temperature and below its yield stress, long-term stress, will appear permanent deformation;E. plastic material is sensitive to notch damage;The mechanical properties of F. plastic raw materials are usually much lower than those of metals, but the specific strength and specific modulus of composite materials are higher than those of metals. If the products are designed reasonably, they will be more advantageous;G. generally strengthen the mechanical properties of plastic raw materials, is the opposite sex;H. some plastic materials absorb moisture and cause changes in size and properties;I. some plastics are flammable;The fatigue data of J. plastic raw materials are very few and need to be considered according to their use
Plastic has good insulation for electricity, heat and sound: electrical insulation, arc resistance, heat preservation, sound insulation, sound absorption, vibration absorption, noise elimination, and excellent performancePlastic raw materials are extracted from some oil in the part of PC is most familiar with the material extracted from the oil, the PC material has a gasoline burning time; ABS is made from coal, ABS will show when soot like burn out; POM extraction from natural gas, POM will have a very smelly smell of gas when burned.
Polymer: any of the pure or polymeric materials produced by the polymerization process, whether natural or synthetic resins, are polymers, polymers, or polymers
Plastic materials: is made of macromolecule resin (polymer) as the main ingredients penetrate various auxiliary materials or additives, in particular temperature, has the plasticity and fluidity under pressure, can be molded into shape and maintain the same shape of material under certain conditions.
