Hard hat PE and ADS material difference

1. PE: Polyethylene
Polyethylene is one of the most widely used polymer materials in everyday life, commonly found in plastic bags, plastic films, and milk containers. It exhibits excellent resistance to various organic solvents and many acids and bases, but it is not resistant to oxidizing agents like nitric acid. In an oxidizing environment, polyethylene can undergo oxidation. When in film form, polyethylene appears transparent, but when crystallized, it becomes opaque due to light scattering caused by the numerous crystals within. The degree of crystallinity in polyethylene depends on the number of branches; more branches make crystallization more difficult. The melting temperature of polyethylene varies between 90°C and 130°C, with higher branching leading to lower melting points. High-density polyethylene can be dissolved in xylene at temperatures above 130°C to produce single crystals. Its chemical structure is represented as: -CH₂-CH₂-CH₂-CH₂-CH₂-CH₂-CH₂-CH₂-.

2. ABS: Acrylonitrile, Butadiene, Styrene
ABS is a synthetic thermoplastic made from acrylonitrile, butadiene, and styrene, which are grafted together. It is known for its high strength, toughness, and overall performance, making it a popular choice in engineering plastics. The production typically involves grafting acrylonitrile and styrene onto a polybutadiene or styrene-butadiene rubber backbone. This creates a mixture of graft polymers and acrylonitrile-styrene copolymers (SAN). Recent developments have introduced variations where ABS is blended with SAN in different proportions to suit specific applications.
ABS was first commercially produced in the United States in the mid-1950s. Two main methods are used: mechanical blending of rubber and SAN resin, or emulsion graft copolymerization in latex systems. The material consists of rubber particles dispersed in a continuous SAN matrix. These rubber particles absorb impact energy, reducing crack propagation and improving toughness. The grafting process enhances compatibility between the rubber and the resin phase, depending on the amount and composition of SAN grafted onto the rubber. A significant difference in acrylonitrile content between the two components can lead to poor adhesion and interface cracking.
ABS can be processed through injection molding, extrusion, blow molding, and other techniques. It is also suitable for coating, adhesive bonding, and vacuum evaporation. Due to its good resistance to oils, chemicals, and corrosion, as well as its ability to be electroplated, it is often used as a lightweight and cost-effective alternative to metal. Special grades of ABS are available for flame retardancy and heat resistance, allowing it to be used in a wide range of industries, including automotive, electronics, and consumer goods.

China Labor Insurance Network