Due to the different materials of safety shoe soles, such as leather soles, rubber soles, and polyurethane soles. The advantages and disadvantages of different shoe soles are different.
Today we will introduces with you the advantages and disadvantages of rubber soles: Rubber solesare divided into natural rubber and recycled rubber by Thermos-compression molding. Safety shoe manufacturers said their advantages are: good wear resistance, non-slip, elastic, not easy to break, good softness, good stretchability, stable shrinkage, good hardness, good bending, waterproof.
Disadvantages are: heavier, more prone to spit (which is a quality issue), less likely to corrode (environmentally friendly issues), not rigid, easily penetrated, poor breathability, poor hygroscopicity, fear of oil immersion, etc. Rubber foam: lighter than the rubber sole,when pressed with your fingers, the surface rebound is more obvious than the general sole, and the wear resistance is poor. High-pressure polyethylene rubber sole: It is made of high-pressure polyethylene and rubber-based soles, rubber and plastic. Raw rubber bottom: more expensive, non oil and heat resistant, easy to change of color.
In the mid-1950s, industrial production began in the United States. Industrial production methods can be divided into two categories: one is the mechanical blending of polybutadiene or styrene butadiene rubber and SAN resin on a roll, or the blending of the two latex and recopolymerization; the other is in poly Styrene and acrylonitrile monomers are added to the styrene-butadiene latex with low content of butadiene or styrene to carry out emulsion graft copolymerization, or to be mixed with SAN resin in different ratios. Structure, properties and applications In ABS resin, the rubber particles are dispersed in the SAN resin continuous phase. When impacted, the cross-linked rubber particles absorb and absorb this energy, causing the stress to disperse, thereby preventing the development of the tear, improving tear resistance. The purpose of graft copolymerization is to improve the compatibility and adhesion of the rubber particle surface to the resin phase. This relates to the amount of free SAN resin and the composition of the SAN resin grafted on the rubber backbone.
The difference between the acrylonitrile content of these two resins should not be too large, otherwise the compatibility is not good, which can lead to the cracking of the interface between the rubber and the resin. The ABS resin can be processed into plastic by injection molding, extrusion, vacuum, blow molding, and roll forming, and can also be processed by mechanical,adhesive, coating, vacuum evaporation. Due to its excellent overall performance and wide range of uses, it is mainly used as an engineering material and can also be used for household life appliances.
Due to its good resistance to oil, acid, alkali, salt, and chemical reagents, and its ability to be electroplated, it has the advantages of good gloss, light weight, and low price when plated with a metal layer. It can be used to replace certain metals. Many types of self-extinguishing and heat-resistant types can also be synthesized to suit various applications. Hard hats of different materials have different properties and can be selected correctly according to your needs.