Dab tsi yog thermoplastic polyurethane elastomer?

Dab tsi yog thermoplastic polyurethane elastomer?

Polyurethane Elastomer yog ntau yam ntawm cov khoom siv hluavtaws (lwm yam Elastomers tau nrum polyurethane elastomers, abbretiated li CPU, thiab sib xyaw polyurethane elastomers, sau ntawv luv li mpu).

TPU yog hom polyurethane elastomer uas tuaj yeem muab cov yas ua kom yooj yim los ntawm cov cua sov thiab yaj los ntawm cov kuab tshuaj. Piv nrog CPU thiab MPU, TPU muaj tsawg lossis tsis muaj tshuaj tua kab ke sib txuas hauv nws cov qauv tshuaj. Nws cov molecular chart yog lightically kab, tab sis muaj qee qhov nyiaj ntawm lub cev hla kev sib txuas. Nov yog thermoplastic polyurethane elastomer uas yog tus yam ntxwv heev hauv kev teeb tsa.

Tus qauv thiab kev faib tawm ntawm TPU

Thermoplastic Polyurethane Elasteane Elastomer yog ib (AB) thaiv linear polymer. Sawv cev rau cov polymer polyol (ester lossis polyether, hnyav hnyav ntawm 1000 ~ 6000) nrog siab molecular hnyav, hu ua saw ntev; B sawv cev rau ib daim diol uas muaj 2-12 ncaj cov saw carbon atoms, hu ua ib qho luv.

Hauv cov qauv ntawm thermoplastic polyurethane elastomer, uas muaj cov yam ntxwv ntawm kev yoog raws thiab kev softness, ua tpu muaj chaw ntau zog; Lub ureteane saw tsim los ntawm cov kev tawm tsam ntawm B ntu thiab ISOCYANATE yog hu ua ib ntu nyuaj, uas muaj ob qho nyuaj thiab cov khoom nyuaj. Los ntawm kho cov feem sib piv ntawm A thiab B ntu, TPU khoom nrog cov khoom sib txawv thiab cov tshuab sib txawv yog ua.

Raws li cov qauv Segment Segment, nws tuaj yeem faib ua hom qib polyester, thiab pawg tab sis pab pawg, lossis pawg butene pab pawg. Raws li cov qauv segment nyuaj, nws tuaj yeem faib ua qhov ua kom muaj zog thiab koj txoj kev ua kom muaj kev sib tw glycoling extenders lossis txoj saw diam ntxiv. Cov kev faib tawm ib txwm tau muab faib ua hom polyester thiab hom polyether.

Dab tsi yog cov ntaub ntawv nyoos rau TPU synthesis?

(1) Polymer Diol

MacRomolecular dij nrog lub cev hnyav nrog 500 rau 4000 thiab cov ntsiab lus ntawm TPU lub luag haujlwm hauv lub cev muaj kev txiav txim siab hauv lub cev thiab tshuaj lom neeg ntawm TPU.

Cov polymer Diol haum rau TPU elastomer tuaj yeem faib ua polyester thiab polyester yog cov adipic acid glycol (pble) ε pc; Polyethers suav nrog PolyoxyPropene ether glycol (ppg), tetrahydrofuran polyether Glycol (PTMG), thiab lwm yam.

(2) Diisocyanate

Lub cev hnyav molecular yog me me tab sis muaj nuj nqi, uas tsis tsuas yog ua si lub luag haujlwm ntawm kev txuas tus TPU nrog ntau yam khoom zoo thiab cov neeg kho tshuab. Cov Diisocyanates muaj feem xyuam rau TPU yog: Methylene DiphenyLyOs (Methylene Diisocyanate (Naphthalene Diisocyanate (NDI), P-Penyldimethyl Diisocyanate (PXDI), thiab lwm yam.

(3) saw txuas

Cov saw txuas nrog molecular ceeb thawj ntawm 100 ~ 350, muaj cov pawg me molecular, qhib cov pab pawg me me kom tau txais kev tawv ntau thiab tawv tawv ntawm TPU. Cov saw txuas ntxiv tsim nyog rau TPU suav nrog 1,4-butanol (bdo), 1,4-cyclohexan), p-phenyletimethanol (p-phenyletimethylglycol (pxg), thiab lwm yam.

Hloov kho daim ntawv thov ntawm TPU raws li tus neeg sawv cev nruj

Txhawm rau txo cov nqi tsim khoom thiab tau txais kev ua yeeb yam ntxiv, Polyurethane Thermoplastic elastomers elastomers elasting ntau yam thermopoplastic thiab hloov roj hmab cov ntaub ntawv.

Vim nws lub siab polarity, polyurethane tuaj yeem sib xws nrog cov resins polgar lossis pob, xws li chlorinated polyethylene (CPE), uas tuaj yeem siv los ua cov khoom kho mob; Kev sib xyaw nrog ABS tuaj yeem hloov cov tshuab thermoplastics rau kev siv; Thaum siv ua ke nrog polycarbonate (PC), nws muaj cov khoom xws li cov roj tsis kam, roj tsis kam, thiab tuaj yeem siv los ua lub cev tsheb; Thaum ua ke nrog polyester, nws txoj kev nruj tuaj yeem txhim kho; Tsis tas li ntawd, nws tuaj yeem sib haum nrog PVC, Polyoxymethylene lossis PVDC; Polyester Polyurethane tuaj yeem tau zoo nrog 15% Nitrile roj hmab lossis 40% Nitrile Roj Hmab / PVC sib xyaw; Polyether Polyurethane tseem tuaj yeem tau zoo nrog 40% Nitrile Roj Hmab / polyvinyl chloride muab cov nplaum; Nws tseem tuaj yeem sib xws nrog Acrylonitrile Styrene (san) copolymers; Nws tuaj yeem tsim interpenetating network (IPN) cov qauv nrog cov polysiloxanes. Feem coob ntawm cov kab lus saum toj no tau hais tawm tau twb tau ua tiav lawm.

Nyob rau hauv xyoo tsis ntev los no, tau muaj kev tshawb fawb ntxiv rau kev ua kom tawv los ntawm TPU hauv Suav teb. Kev sib xyaw ntawm TPU thiab pom tsis tsuas yog txhim kho cov cua kub siab thiab cov khoom siv tshuab ua haujlwm ntawm TPU, tab sis kuj ua kom tawv tawv. Qee cov kws tshawb nrhiav tau pom tias nyob hauv kaum matrix, piv rau Alloy nrog TPU los ntawm brittle fracture rau ductile bacture. Qhov sib ntxiv ntawm TPU tseem xaus pom nrog cov duab nco tau. Lub cheeb tsam crystalline ntawm kev pab theem ntawm cov duab nco txog Alloy, thaum lub caij amorphous Tpu thiab pom cov theem hloov kho. Thaum cov lus teb rov qab kub yog 165 ℃ thiab lub sijhawm rov qab yog 120 feeb, tus nqi rov qab los ntawm alloy ncav cuag tau qhov zoo tshaj plaws.

TPU yog qhov nyuaj rau yuav tsum tau tshaj tawm nrog tsis-polyethylene roj hmab, etooprene roj hmab, thiab siv tsis tau los tsim cov khoom siv roj hmab, thiab siv tsis tau los tsim cov composites nrog kev ua tau zoo. Yog li no, txoj kev kho deg xws li Plasma, Corona, tus pas ntub, nplaim taws, nplaim taws lossis cov roj uas muaj ntau ntxiv rau tom kawg. Piv txwv li, American cov khoom lag luam thiab cov roj ntsha tau nqa tawm F2 / O2 Molecular hnyav hmoov nrog rau ntawm ultras cov modulus, tensile lub zog thiab coj kev tiv thaiv. Thiab F2 / O2 kev kho roj ua tau zoo tuaj yeem siv tau rau cov lus piav qhia luv luv luv luv nrog 6-35mm, uas tuaj yeem txhim kho lub pob qaj thiab ua kua muag tawv ntawm cov khoom siv sib xyaw.

Cov ntawv thov ntawm TPU yog dab tsi?

Xyoo 1958, Goodrich Tshuaj Hluav Taws Xob (tam sim no tau muab cov npe ntawm TPU Hom Brandu thawj zaug. Txij li 40 xyoo dhau los, muaj ntau tshaj 20 hom npe npe thoob ntiaj teb, thiab txhua hom muaj ntau hom khoom. Tam sim no, lub ntsiab TPU cov khoom siv raw manufacturers nyob rau hauv lub ntiaj teb yog: lubrtsman corporation, mckinsey, kub, thiab lwm yam

Raws li ib tug zoo elastomer, TPU muaj ntau cov khoom hauv dej ntws, uas tau siv dav hauv cov khoom siv txhua hnub, cov khoom ua si, khoom ua si, thiab lwm daim teb. Hauv qab no yog qee qhov piv txwv.

① Cov Khoom Siv Khau

TPU yog tsuas yog siv rau cov khau khau vim nws zoo elasticity thiab hnav tsis kam. Cov khoom lag luam khau uas muaj TPU yog qhov zoo dua zoo dua li cov khoom siv khau ua ke, yog li lawv tau siv khau khiab ntau dua, tshwj xeeb yog cov khau ua kis las thiab khau uas muaj xws li.

Hoses

Vim nws cov muag muag, lub zog zoo tensile, cuam tshuam lub zog, thiab roj hoses thiab roj hoses thiab roj hoses thiab roj hoses, tsheb hlau, tsheb, thiab tshuab cov cuab yeej siv hluav taws xob, thiab tshuab cov cuab yeej siv hluav taws xob, thiab tshuab cov cuab yeej siv hluav taws xob, thiab tshuab cov cuab yeej siv hluav taws xob, thiab cov cuab yeej siv tsheb.

Cable

TPU muab cov kua muag tsis kam, hnav tsis kam, thiab cov yam ntxwv muaj zog, muaj kub thiab qis thiab kub ua rau cable kev ua tau zoo. Yog li nyob rau hauv Suav lag luam, cov cab ntau xws li tswj cov cable thiab cov khoom siv hluav taws xob siv TPUs los tiv thaiv ntau yam kev tsim qauv.

④ cov khoom siv kho mob

TPU yog kev nyab xeeb, ruaj khov thiab zoo siv cov ntaub ntawv, thiab yuav tsiv mus rau cov tshuaj phthalful, thiab yuav tau tsiv mus rau cov ntshav lossis lwm yam dej hauv lub hnab kho mob los ua rau phiv. Ntxiv mus, qhov tshwj xeeb tsim extrusion qib thiab txhaj qib TPU tuaj yeem siv tau yooj yim nrog cov khoom siv me me hauv cov khoom siv uas twb muaj lawm.

⑤ Tsheb thiab lwm txoj kev tsheb thauj mus los

Los ntawm extruding thiab txheej ob sab ntawm cov ntaub nylon nrog polyurethane bermopictic elastomer, ua tau zoo dua li vulcanized roj hmab nyiaj tau; Polyurethane thermoplastic elastomer txhawb nqa cov iav fiber ntau xws li cov tawv nqaij ntawm ob sab, pob tw, tshuaj tiv thaiv kab mob, thiab cov pob zeb los tiv thaiv.