The differentiation of TPU and PU

The TPU(the hot Su gather ammonia ester flexibility body) is a newly arisen plastics species, because of the TPU have to goodly process sex and bear to wait sex, environmental protection, drive extensive application at the shoe material, tube material, thin film, roll the related profession of the round, electric cable electric wire...etc..Gather ammonia ester hot Su flexibility body again call hot the Su gather ammonia ester rubber, brief name TPU, is a kind(AB) of Qian segment line polymer, AN is Gao the polyester of the molecular weight(1000-6000) or gather ether, B for contain 2-12 keep chain carbon atom of two Chun, the chemistry structure of the AB chain segment is to use two difference the cyanic acid ester be usually a MDI conjunction.General structure type for see diagram.The hot Su gather ammonia ester rubber to depend a member hydrogen key to hand over allied or big member chain light the degree hand over allied, along with go up of temperature or lower, this 2 kinds hand over allied the structure have can negative.Die down the meltdown appearance or the aqua appearance member dint, but cool off or after melting agent vaporize again have a strong member dint conjunction together, instauration original solid of function.

Gather ammonia ester hot Su flexibility the body have a polyester type and gather ether type 2 types, white have no rule globosity or pillar form grain, opposite density 1.10-1.25, gather an ether type opposite density smaller than polyester type.Gather an ether type glass to turn temperature to 100.6-106.1 ℃ , the polyester type glass turn temperature 108.9-122.8 ℃ .Gather the brittleness temperature of ether type and polyester type low in-62 ℃ , the hard ether type bear low temperature sorrow at the polyester type.

Gather ammonia ester hot Su flexibility the body outstanding characteristics is to bear to whet sex excellent, bear ozone best, degree of hardness big, strength Gao, flexibility good, bear low temperature, goodly bore oil and bore chemicals and bore environment function, gather an ether type ester water solution stability far above the polyester type in the damp environment.

Gather ammonia ester a hot Su flexibility body not poisonous, tasteless, can be dissolve in A B to go together with, wreath F Tong, four hydrogen Mao Nans, two oxygens six wreath, two A Ji A Mao An etc. melting agent, also ability dissolve at the methyl benzene, acetic acid B ester, D Tong, acetone with appropriate the comparison constitute of mixture melting agent in, present have no the color transparent appearance, more and so store to save a stability.

The PU gather ammonia ester, from two difference cyanic acid ester or many difference cyanic acid ester with take to have 2 above the compound of the Qian Ji reaction born high mark son the generic name of the compound, it lord chain top imply many regiment of NHCOO Ji for repeat.In common use of two difference cyanic acid the ester have methyl benzene two difference cyanic acid ester(TDI), two benzene methanes two difference cyanic acid ester(MDI), F two difference cyanic acid ester(HDI), difference Fo Er Tong two difference cyanic acid ester(IPDI), two wreath F Ji methane two difference cyanic acid ester(HMDI), many second A Ji many benzene Ji many difference cyanic acid ester(PAPI), benzene two second A Ji two difference cyanic acid ester(XDI) etc..According to the dissimilarity which use Qian Ji a set cent, can is divided into a polyester type with gather an ether type 2 types.Can used for manufacturing plastics to product, bear to whet to synthesize rubber product, synthetic fiber, hard quality and soft foam plastics product, glue and coating etc..

TPU and PU is essentially the same kind of material constitute of.But while doing this two kinds of gum to anticipate.They the formula for use isn't similar.This two kinds of gum anticipate and is divided into a lot of function.

The characteristic that the gum that the different formula does out anticipate isn't similar either.These characteristic is machine characteristic and physics characteristic but say.