Rubber shoes materialAccording to the raw materials can be divided into natural rubber and synthetic rubber.According to the form into the massive raw rubber, latex, liquid rubber and rubber powder.Some latex for rubber gel;Oligomer liquid rubber for rubber, unvulcanized former general for sticky liquid;Powder rubber latex processing into powder, and ingredients and processing production.Rubber shoes material factory in use is divided into general type and special type two kinds.
1, linear structure: the general structure of unvulcanized rubber.Due to the large molecular weight, under the action of external force, group that is fine.When the external force, removal of the external force, the degree of entanglement of the fine mass change, molecular chain rebound, a strong tendency of recovery, this is the origin of the high elastic rubber.
2, the structure of the branched chain: rubber macromolecular chain of the accumulation of the branched chain formed gel.Gel properties and processing of rubber., mixing with various compound area, often get in the gel forming local blank, the formation of the reinforcing and crosslinking, and become a weak part of the product.
3, crosslinking structure: linear molecules through some atoms or groups of atoms Bridges connected to each other, form a three-dimensional network structure.Along with the vulcanization process, continuously strengthen the structure.So, chain segments free ability to drop, plasticity and elongation decreased, strength, elasticity and hardness, compression permanent deformation and swelling degree drop.
In shoes materials, will hear a few more professional nouns, such as MD, EVA, PU, PVC, TPU, such as vocabulary, refers to the model or phylon collectively first MD, phylon usually do called dragon is a kind of in the bottom of shoes materials, main is to use hot compression of EVA foam produced by mixing material.Common EVA, mainly of vinyl acetate resin, characterized by the good light and elastic.
PB is we often say the rubber abbreviation, including natural and synthetic rubber.Natural rubber are mostly derived from hevea of all kinds of trees, after the rubber skin cut, cut out milky SAP, and the juice is latex, the latex after a series of process operation can get natural rubber.As opposed to synthetic rubber are mostly artificial method, through the use of different original synthesis, in order to gain different kinds of rubber.
Often said that the PU is refers to the polyurethane synthetic polymer materials, is often used to the bottom of foot palm after intercalation of big density durable material based on foam rubber.And PVC is PVC, its appearance is light yellow, translucent, there is a certain luster, where inflectional bleaching.
PU materials comparatively light, and the weight of the material is wear-resisting, but his price is also the most expensive, if you take in the hands of the PU material will feel very light, and the hole on the reverse of the sole is round.PVC material usually heavier, also will be cheaper price, quality, often appear the phenomenon of broken in the winter, if you take almost nose to smell, PVC material can obviously asked some flavor, put long, chairman of the white stuff.