The advantages, disadvantages and uses of commonly used plastic products
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- Time of issue:2020-12-10
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(Summary description)Plastic products: Based on synthetic resin as the basic material, fillers, plasticizers, colorants and stabilizers are added in a certain proportion, and they are mixed, plasticized, and made under a certain pressure and temperature.
(1) Thermoplastics
1. Low-density polyethylene
Advantages: light weight, low moisture absorption, good insulation, strong extensibility, strong transparency, good cold resistance, and strong chemical stability;
Disadvantages: low strength, poor aging resistance.
Purpose: To make gears, bearings, and cable sheaths.
2. High-density polyethylene
Advantages: good heat resistance, good cold resistance, good wear resistance, good chemical stability, corrosion resistance, low water absorption and water vapor permeability, high surface hardness, and good dimensional stability;
Disadvantages: poor aging resistance.
Purpose: To make single-mouth bottles, transport boxes, storage tanks, cable sheaths, and pressure pipes.
3. Polypropylene
Advantages: light weight, no water absorption, good dielectric properties, good chemical stability, and good heat resistance;
Disadvantages: poor light resistance, easy aging, low temperature toughness and poor dyeing properties.
Purpose: To make flanges, gears, fan impellers, pump impellers, joints, various chemical containers, pipelines, valve fittings, pump casings.
4. PTFE
Advantages: good high temperature resistance, good low temperature resistance;
Disadvantages: low strength, strong cold flow.
Uses: to produce anti-friction sealing parts, chemical corrosion-resistant parts, heat exchangers, tubes, rods, plate products and various parts, insulating materials.
5. Polystyrene
Advantages: high rigidity, low density, relatively transparent at room temperature, no water absorption, corrosion resistance, high electrical resistance, etc.;
Disadvantages: poor impact resistance, intolerance to boiling water, poor oil resistance.
Uses: manufacturing instrument parts and equipment shells in the electronics industry; storage tanks, pipes, and elbows in the chemical industry.
6. Engineering plastics
Advantages: It has the mixed characteristics of "hardness, toughness and rigidity" and good comprehensive mechanical properties.
Purpose: Manufacturing gears, pump impellers, bearings, pipelines, storage tank linings, motor shells, instrument shells, instrument panels, battery tanks and water tank shells, etc.
(2) Thermosetting plastics
1. Phenolic resin
Advantages: resistance to weak acid and weak alkali, high temperature resistance.
Uses: making refractory materials, friction materials and adhesives.
2. Epoxy resin
Advantages: good insulation performance, heat resistance, cold resistance, high chemical stability, good molding process performance, is a very good adhesive.
3. Furan resin
Advantages: resistant to corrosion by strong acids, strong alkalis and organic solvents, good flame retardancy, and less smoke during combustion.
Disadvantages: The curing process is inconvenient and generally requires post-heating treatment.
4. Unsaturated polyester resin
Advantages: excellent process performance, curing and molding at room temperature, especially suitable for large-scale and on-site manufacturing of glass fiber reinforced plastic products, the comprehensive performance of the cured resin is good;
Disadvantages: large volume shrinkage.
The advantages, disadvantages and uses of commonly used plastic products
(Summary description)Plastic products: Based on synthetic resin as the basic material, fillers, plasticizers, colorants and stabilizers are added in a certain proportion, and they are mixed, plasticized, and made under a certain pressure and temperature.
(1) Thermoplastics
1. Low-density polyethylene
Advantages: light weight, low moisture absorption, good insulation, strong extensibility, strong transparency, good cold resistance, and strong chemical stability;
Disadvantages: low strength, poor aging resistance.
Purpose: To make gears, bearings, and cable sheaths.
2. High-density polyethylene
Advantages: good heat resistance, good cold resistance, good wear resistance, good chemical stability, corrosion resistance, low water absorption and water vapor permeability, high surface hardness, and good dimensional stability;
Disadvantages: poor aging resistance.
Purpose: To make single-mouth bottles, transport boxes, storage tanks, cable sheaths, and pressure pipes.
3. Polypropylene
Advantages: light weight, no water absorption, good dielectric properties, good chemical stability, and good heat resistance;
Disadvantages: poor light resistance, easy aging, low temperature toughness and poor dyeing properties.
Purpose: To make flanges, gears, fan impellers, pump impellers, joints, various chemical containers, pipelines, valve fittings, pump casings.
4. PTFE
Advantages: good high temperature resistance, good low temperature resistance;
Disadvantages: low strength, strong cold flow.
Uses: to produce anti-friction sealing parts, chemical corrosion-resistant parts, heat exchangers, tubes, rods, plate products and various parts, insulating materials.
5. Polystyrene
Advantages: high rigidity, low density, relatively transparent at room temperature, no water absorption, corrosion resistance, high electrical resistance, etc.;
Disadvantages: poor impact resistance, intolerance to boiling water, poor oil resistance.
Uses: manufacturing instrument parts and equipment shells in the electronics industry; storage tanks, pipes, and elbows in the chemical industry.
6. Engineering plastics
Advantages: It has the mixed characteristics of "hardness, toughness and rigidity" and good comprehensive mechanical properties.
Purpose: Manufacturing gears, pump impellers, bearings, pipelines, storage tank linings, motor shells, instrument shells, instrument panels, battery tanks and water tank shells, etc.
(2) Thermosetting plastics
1. Phenolic resin
Advantages: resistance to weak acid and weak alkali, high temperature resistance.
Uses: making refractory materials, friction materials and adhesives.
2. Epoxy resin
Advantages: good insulation performance, heat resistance, cold resistance, high chemical stability, good molding process performance, is a very good adhesive.
3. Furan resin
Advantages: resistant to corrosion by strong acids, strong alkalis and organic solvents, good flame retardancy, and less smoke during combustion.
Disadvantages: The curing process is inconvenient and generally requires post-heating treatment.
4. Unsaturated polyester resin
Advantages: excellent process performance, curing and molding at room temperature, especially suitable for large-scale and on-site manufacturing of glass fiber reinforced plastic products, the comprehensive performance of the cured resin is good;
Disadvantages: large volume shrinkage.
- Categories:Industry news
- Author:
- Origin:
- Time of issue:2020-12-10
- Views:0
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