PVC, UPVC, CPVC, PP, PE, PB, PVDF yeeb nkab ua tau zoo thiab qhov sib txawv # yeeb nkab extrusion kab # tshuab extrusion

PVC
PVC(PolyVinylChloride) feem ntau muaj xya qib (SG1-SG7) raws li nws qhov nyuaj thiab cov khoom, nrog qhov ceev ntawm kwv yees li 1.4 g / cm³. Hauv qab SG4, nws feem ntau yog cov khoom mos, uas xav tau ntau cov yas thaum tsim, thiab feem ntau yog siv rau kev ua tawv nqaij cuav, hlau thiab cable rwb thaiv tsev, foob, thiab lwm yam. Saum SG5, nws yog cov khoom tawv, feem ntau yog siv rau kev ua ntau yam yeeb nkab, xws li dej ntws, hluav taws xob, xa ntawv thiab kev sib txuas lus yeeb nkab thiab fittings, ntau yam phaj, ntawv thiab profiles, thiab lwm yam. Tus nqi shrinkage ntawm PVC hauv kev tsim yog 0.6-1.5%, thiab nws muaj cov khoom siv kho tshuab zoo. PVC muaj tus nqi shrinkage ntawm 0.6-1.5%, cov khoom siv kho tshuab zoo, cov khoom siv hluav taws xob zoo heev, tua tus kheej, tiv taus acid thiab alkali muaj zog, tshuaj lom neeg ruaj khov zoo thiab tus nqi qis. Txawm li cas los xij, nws txoj kev loj hlob raug cuam tshuam los ntawm nws qhov kub siv qis, uas yog nyob ib puag ncig 80 ° C ntawm qhov siab tshaj plaws.

CPVC
Cov resin no yog tsim los ntawm kev hloov kho chlorination ntawm polyvinyl chloride (PVC) resin thiab yog ib hom yas engineering tshiab. Cov khoom yog dawb lossis daj daj tsis muaj saj, tsis muaj ntxhiab, tsis muaj tshuaj lom granule lossis hmoov. Tom qab chlorination ntawm PVC resin, qhov tsis sib xws ntawm cov molecular bonds nce thiab polarity nce, uas ua rau cov solubility ntawm cov resin thiab cov tshuaj stability, yog li txhim kho qhov tiv taus cua sov ntawm cov khoom thiab qhov tiv taus corrosion ntawm acids, alkalis, ntsev thiab oxidants. Cov khoom siv kho tshuab ntawm qhov kub deformation thermal ntawm cov nqi tau txhim kho, cov ntsiab lus chlorine tau nce los ntawm 56.7% mus rau 63-69%, Vicat softening kub tau nce los ntawm 72-82 ° C, (mus rau 90-125 ° C), qhov kub siab tshaj plaws siv tau tuaj yeem ncav cuag 110 ° C thiab qhov kub siv ntev yog 95 ° C. Ntawm lawv, CORZAN CPVC cov ntsuas kev ua tau zoo dua. Yog li ntawd, CPVC yog ib hom yas engineering tshiab nrog kev cia siab dav dav.

UPVC
Cov yeeb nkab UPVC yog ua los ntawm PVC resin, uas muaj cov yam ntxwv zoo xws li kev ntsuas kub raug, kev yaj tas li thiab kev nqus sai ntawm cov khoom xyaw zoo ntawm cov khoom ntxiv thaum lub zog gravitational ntawm cov saw hlau molecular tsis muaj zog, thiab tib lub sijhawm, lub ntiaj teb nto moo calcium thiab zinc compound heat stabilizer siv, uas tuaj yeem ntes, tiv thaiv thiab nqus cov neutralization ntawm hydrogen chloride thaum lub sijhawm kub siab thiab yaj ntawm cov resin, thiab ua cov tshuaj sib ntxiv ob npaug nrog cov qauv polyene los hloov cov chlorine atoms nquag thiab tsis ruaj khov hauv lub molecule. Cov tshuaj sib ntxiv ob npaug nrog cov qauv polyene hloov cov chlorine atoms nquag thiab tsis ruaj khov hauv lub molecule. Qhov no tswj tau zoo thiab kev tshawb fawb txog kev puas tsuaj catalytic thiab oxidative decomposition ntawm cov resin hauv lub xeev molten.

PP
PPCov yeeb nkab yog cov khoom siv semi-crystalline. Nws yog stiffer thiab muaj lub melting point siab dua PE. Raws li homopolymer PP yog brittle heev saum 0 ° C, ntau cov khoom lag luam PP yog cov copolymers tsis sib xws nrog 1-4% ethylene lossis siab dua ntawm cov ntsiab lus ethylene hauv pincushion copolymers. Lub zog ntawm PP nce nrog kev nce ntxiv ntawm cov ntsiab lus ethylene thiab muaj Vicat softening kub ntawm 150 ° C. Vim nws cov crystallinity siab, cov khoom siv muaj qhov zoo ntawm qhov chaw thiab khawb tsis kam, thiab PP tsis raug kev txom nyem los ntawm kev ntxhov siab ib puag ncig tawg. PP feem ntau yog hloov kho los ntawm kev ntxiv cov iav fibers, cov hlau ntxiv lossis thermoplastic roj hmab. tus nqi ntws MFR ntawm PP ntau ntawm 1 txog 40. MFR qis PP cov ntaub ntawv muaj kev cuam tshuam zoo dua tab sis qis dua ductility. Rau tib MFR, hom copolymer muaj lub zog siab dua li homopolymer. Vim crystallisation, qhov shrinkage ntawm PP yog siab heev, feem ntau 1.8 txog 2.5%. Thiab qhov kev sib xws ntawm kev shrinkage zoo dua li rau cov ntaub ntawv xws li PE-HD. Qhov ntxiv ntawm 30% iav additive tuaj yeem txo qhov shrinkage mus rau 0.7%. Ob hom homopolymer thiab copolymer ntawm PP cov khoom muaj kev tiv thaiv zoo heev rau kev nqus dej noo, acid thiab alkali corrosion, thiab solubility. Txawm li cas los xij, nws tsis tiv taus cov aromatic hydrocarbon (piv txwv li benzene) cov kuab tshuaj, chlorinated hydrocarbon (carbon tetrachloride) cov kuab tshuaj, thiab lwm yam. PP tsis tseem tiv taus oxidation ntawm qhov kub siab, zoo li PE ua.
PP yog ib qho polymer crystalline nrog tus nqi shrinkage loj (1.0-1.5%) vim muaj kev hloov pauv loj thiab kev taw qhia molecular siab thaum lub yaj raug condensed. Yog li ntawd, thaum lub sijhawm molding, lub siab txhaj tshuaj thiab tus nqi shear yuav tsum tau nce ntxiv kom txhim kho qhov zoo ntawm cov khoom molding.

PE
Polyethylene yog cov khoom siv polymeric organic yooj yim tshaj plaws thiab yog cov khoom siv polymer siv dav tshaj plaws hauv ntiaj teb niaj hnub no. Nws yog polymerised los ntawm ethylene thiab muab faib ua polyethylene siab ceev, polyethylene nruab nrab ceev thiab polyethylene qis ceev raws li nws qhov ceev. Polyethylene qis-density yog mos, ntau dua siab-pressure polymerisation; polyethylene siab-density muaj cov yam ntxwv ntawm rigidity, hardness thiab mechanical zog, ntau dua qis-pressure polymerisation. High-density polyethylene tuaj yeem siv rau cov thawv, cov kav dej, thiab cov ntaub ntawv rwb thaiv tsev hluav taws xob zaus siab, siv rau radar thiab TV. Low-density (siab siab) polyethylene feem ntau siv ntau heev. Polyethylene yog waxy thiab muaj qhov du zoo li quav ciab. Thaum tsis dyed, low-density polyethylene yog pob tshab, thaum high-density polyethylene yog opaque, thiab polyethylene yog cov saw polymeric siab ua los ntawm kev rov ua dua -CH2-units txuas nrog los ntawm kev ntxiv thiab polymerisation ntawm ethylene (CH2 = CH2). Cov khoom ntawm polyethylene nyob ntawm txoj kev nws yog polymerised; Cov polyethylene uas muaj zog heev (HDPE) yog tsim los ntawm Ziegler-Natta polymerisation nyob rau hauv qhov siab nruab nrab (15-30 atm) catalytic tej yam kev mob ntawm cov organic compounds. Cov polyethylene molecules polymerised nyob rau hauv cov tej yam kev mob no yog linear thiab muaj cov saw molecular ntev nrog molecular qhov hnyav ntawm ntau pua txhiab. Nyob rau hauv cov ntaub ntawv ntawm cov dawb radical polymerisation nyob rau hauv qhov siab siab (100-300 MPa), kub siab (190-210 C) thiab peroxide catalysis, qhov tshwm sim yog cov polyethylene uas muaj zog tsawg (LDPE), uas yog branched.
Polyethylene tsis yaj hauv dej thiab muaj dej me me heev, txawm tias rau cov tshuaj yaj xws li toluene thiab acetic acid, uas tsuas yog yaj me ntsis ntawm qhov kub siab tshaj 70 ° C. Txawm li cas los xij, polyethylene hauv daim ntawv particulate tuaj yeem yaj lossis khov ntawm qhov kub ntawm 15 ° C txog 40 ° C. Thaum qhov kub nce, nws yaj thiab nqus cua sov; thaum qhov kub txo qis, nws khov thiab muab cua sov tawm. Nws kuj yog cov khoom siv hauv tsev zoo heev vim nws nqus dej me me heev, tsis yooj yim ntub thiab muaj cov khoom rwb thaiv tsev.

PB
Polybutylene tau tsim thiab siv rau thaum ntxov xyoo 1970 thiab nws cov yam ntxwv khoom siv hais txog kev siv tshuab thiab khoom siv siab rau kev tsim cov profiles, nrog rau kev nqis peev loj hauv cov khoom muaj nqis ruaj khov.

PVDF
Nws zoo li yog hmoov dawb los yog hmoov me me, cov saw hlau molecular zoo sib xws, tab sis kuj muaj hydrogen bond zoo, oxygen index ntawm 46%, tsis kub hnyiab, crystallinity 65% ​​~ 78%, density ntawm 1.17 ~ 1.79g / cm3, melting point ntawm 172 ℃, kub deflection 112 ~ 145 ℃, siv tau ntev ntawm -40 ~ 150 ℃.
PVDF resin feem ntau yog hais txog vinylidene fluoride homopolymer lossis vinylidene fluoride thiab me me ntawm lwm yam fluorine vinyl monomer copolymer, PVDF resin ob qho tib si fluorine resin thiab cov yam ntxwv dav dav, ntxiv rau kev tiv thaiv tshuaj lom neeg zoo, kev tiv thaiv kub siab, kev tiv thaiv oxidation, kev tiv thaiv huab cua, kev tiv thaiv hluav taws xob, tab sis kuj muaj piezoelectricity, dielectricity, thermoelectricity thiab lwm yam khoom tshwj xeeb, tam sim no yog kev tsim cov yas uas muaj fluorine ranked PVDF daim ntawv thov feem ntau yog concentrated hauv petrochemical, hluav taws xob thiab hluav taws xob thiab fluorocarbon txheej teb. Nws cov tshuaj ruaj khov zoo, hluav taws xob rwb thaiv tsev, yog li ntawd kev tsim cov khoom siv kom tau raws li TOCS thiab nplaim taws retardant xav tau, yog dav siv hauv kev lag luam semiconductor ntawm kev khaws cia thiab thauj cov tshuaj purity siab, nyob rau hauv xyoo tas los no kev siv PVDF resin ua porous membrane, gel, diaphragm, thiab lwm yam, hauv cov roj teeb lithium secondary daim ntawv thov, kev siv tam sim no ntawm PVDF tau dhau los ua ib qho ntawm kev thov kev lag luam loj hlob sai tshaj plaws. PVDF yog cov txheej txheem fluorocarbon tseem ceeb tshaj plaws PVDF yog ib qho ntawm cov khoom siv raw tseem ceeb tshaj plaws, thiab cov txheej txheem fluorocarbon uas tau npaj los ntawm nws tau tsim mus rau tiam thib rau. Vim yog qhov tiv taus huab cua zoo heev ntawm PVDF resin, nws tuaj yeem siv sab nraum zoov ntev yam tsis tas yuav saib xyuas, thiab hom txheej txheem no siv dav hauv cov chaw nres tsheb fais fab, tshav dav hlau, txoj kev loj, cov tsev siab, thiab lwm yam. Tsis tas li ntawd, PVDF resin kuj tuaj yeem sib xyaw nrog lwm cov resins, xws li PVDF thiab ABS resin sib xyaw kom tau txais cov ntaub ntawv sib xyaw, tau siv dav hauv kev tsim kho, kho kom zoo nkauj tsheb, lub plhaub khoom siv hauv tsev, thiab lwm yam.
PVC yog ib hom khoom siv kho kom zoo nkauj yas, PVC yog lub npe luv ntawm cov khoom siv polyvinyl chloride, yog cov khoom siv tseem ceeb ntawm polyvinyl chloride resin, ntxiv cov nqi tsim nyog ntawm cov neeg sawv cev tiv thaiv kev laus, hloov kho, thiab lwm yam, los ntawm kev sib tov, calendering, lub tshuab nqus tsev thiab lwm yam txheej txheem los ua cov khoom siv.

Cov ntaub ntawv PVC yog lub teeb yuag, rwb thaiv tshav kub, khaws cia tshav kub, tsis muaj dej noo, tsis kub hnyiab thiab yooj yim rau kev tsim kho. Cov lus qhia tshwj xeeb, xim thiab cov qauv.
Nws yog ib qho ntawm cov ntaub ntawv kho kom zoo nkauj tshaj plaws ntawm cov ntaub ntawv yas.

Qhov zoo ntawm PVC fasteners yog cov hauv qab no:
1. lub teeb zoo, rwb thaiv tsev kub, khaws cia kub, tsis kam noo noo, nplaim taws retardant, acid thiab alkali tsis kam, corrosion tsis kam.
2. Kev ruaj khov, dielectricity zoo, durability, anti-aging, yooj yim rau fuse thiab bond.
3. Muaj zog khoov thiab cuam tshuam toughness, siab elongation thaum tawg.
4. Yooj yim rau kev ua thiab kho kom zoo los ntawm kev sib tsoo, sib tov, ua daim ntawv, txiav, rho tawm lossis tuag-casting, thiab tuaj yeem ua tau raws li qhov xav tau ntawm ntau yam profile specifications.
5. Qhov chaw du, xim ci, kho kom zoo nkauj, dav siv rau kev kho kom zoo nkauj.
6. Cov txheej txheem tsim kho yooj yim thiab kev teeb tsa yooj yim.

PE yeeb nkab yog ua los ntawm cov khoom siv polyethylene, PE yeeb nkab yog qhov tsim nyog rau kev teeb tsa zais, cov khoom siv qhib kev teeb tsa yog yooj yim rau laus.

Cov yeeb nkab PP-R muaj qhov zoo ntawm lub teeb yuag, lub zog zoo, tiv taus corrosion, tsis muaj nplai, lub neej ntev, thiab lwm yam, ntxiv rau cov yam ntxwv tseem ceeb hauv qab no:
(1) Cov khoom siv hauv tsev tsis muaj tshuaj lom, huv, ntsuab, PP-R cov khoom siv raw yog polyolefin, nws cov molecule yog tsim los ntawm cov pa roj carbon, hydrogen, tsis muaj tshuaj lom, kev ua tau zoo heev;
(2) cov khoom uas tiv taus kub, txuag tau kub, thiab txuag hluav taws xob, cov yeeb nkab PP-R Vicat softening kub yog 131.3 ℃, qhov kub siab tshaj plaws yog 95 ℃, thiab siv tau ntev (50 xyoo) kub txog li 70 ℃. Cov khoom no muaj thermal conductivity txog li 0.24W/m ℃, uas tsuas yog 1/200 ntawm cov yeeb nkab steel thermal conductivity xwb, yog li nws muaj cov txiaj ntsig zoo heev rau kev txuag hluav taws xob rau cov yeeb nkab dej kub rwb thaiv tsev.
(3) Yooj yim rau kev teeb tsa, txhim khu kev qha, siv kev sib txuas kub fusion homogeneous, ob peb vib nas this kom ua tiav kev sib koom ua ke, thiab kev sib txuas cov yeeb nkab hlau thiab cov khoom siv dej siv cov khoom siv hlau zoo, muaj kev nyab xeeb thiab txhim khu kev qha.

Cov chaw siv rau PP-R cov kav dej kub thiab dej txias
Cov tshuab dej kub thiab dej txias hauv cov tsev, suav nrog cov tshuab cua sov hauv nruab nrab;
Cov tshuab cua sov hauv cov tsev, suav nrog cov cua sov hauv pem teb, phab ntsa thiab cov tshuab cua sov radiant;
Cov tshuab rau kev muab dej huv uas siv tau ncaj qha rau kev haus;
Cov tshuab cua txias hauv nruab nrab (centralized);
Kev ua liaj ua teb, kev siv dej hauv vaj;
Cov tes hauj lwm dej nag;
Cov tes hauj lwm ua luam dej;
Cov yeeb nkab tes hauj lwm rau kev teeb tsa hnub ci;

PPR feem ntau yog siv rau cov yeeb nkab me me, thiab PPR muaj rau ob qho tib si qhib thiab zais cia.
Cov yeeb nkab PB yog cov khoom siv polybutylene polymer, uas tau siv dav hauv cov tebchaws tsim kho xws li Tebchaws Europe thiab Asmeskas, thiab tau hloov tooj liab ua cov khoom siv nyiam rau cov kav dej kub.

Cov khoom siv tseem ceeb ntawm PEX yeeb nkab yog HDPE, nrog rau tus pib, tus neeg sawv cev sib txuas, catalyst thiab lwm yam khoom siv ntxiv, xws li cov kev xav tau tshwj xeeb kuj tseem tuaj yeem ntxiv lwm cov kev hloov kho.
Cov kav dej PEX yog tsim los ntawm kev siv lub ntiaj teb txoj kev siv tshuab ib kauj ruam (MONSOIL method), siv cov khoom siv polyethylene zoo tib yam los ntxiv cov khoom siv silane grafting, tsim cov tshuaj sib txuas ntawm cov polymer macromolecular chains los hloov cov thawj van der Waals rog, yog li tsim cov qauv sib txuas peb-seem ntawm cov polyethylene sib txuas, qib ntawm kev sib txuas txog li 60% ~ 89%, yog li nws muaj cov khoom siv lub cev thiab tshuaj zoo heev.

ABS yog ib qho styrene-butadiene-acrylonitrile-based terpolymer, nrog rau kev cuam tshuam siab thiab lub zog zoo, tiv taus kub, tiv taus roj, thiab lwm yam.
Kev tso cov xov hluav taws xob hauv tsev yog siv cov yeeb nkab PVC, thiab yuav tsum yog cov yeeb nkab hluav taws PVC txheem, kuj tseem muaj qee qhov kev rov tso cov dej phwj siv cov yeeb nkab PVC, thiab feem ntau siv PPR yog siv rau kev kho cov kab dej, PPR yog qhov tsim nyog dua rau dej.
Qhov tseem ceeb ntawm qhov sib txawv yog tias cov khoom siv raw sib txawv, ppr yog random copolymer polypropylene, pvc yog polyvinyl chloride. pvc siv tau rau kev ntws dej, ppr feem ntau yog rau dej (siv vim tias tus nqi ntws dej siab dhau). Qhov tseeb, pvc tsis muaj tshuaj lom li cov raj xa dej kho mob thiab ntau lub hnab yas yog pvc, siv rau kev tsim kho tsuas yog ntxiv cov khoom hloov kho, ntxiv rau ppr tuaj yeem ua kub yaj pvc tsis tuaj yeem.
PPR yog tsim los ntawm cov khoom siv copolymer polypropylene, PVC yog tsim los ntawm cov khoom siv polyvinyl chloride, tus nqi tsim khoom siab, qib kev noj qab haus huv kuj zoo dua li PVC, thiab tuaj yeem mus qis dua 75 ℃ dej kub, qhov tsis zoo yog yooj yim rau deformation. pvc yog vim tus nqi tsim khoom qis, yog dav siv hauv kev ua liaj ua teb dej, qhov tsis zoo tsuas yog mus rau dej txias.

PE cev
Kub tsis kam
PE cov kav dej xa dej kub qis heev, qhov kub ntawm embrittlement qis heev, siv tau rau hauv qhov ntau ntawm -40 ℃ txog 60 ℃, kev teeb tsa thiab kev tsim kho lub caij ntuj no yuav tsis tshwm sim hauv cov yeeb nkab tawg.
corrosion kuj
Polyethylene yog ib yam khoom inert, tiv taus ntau yam tshuaj lom neeg media yaig, tsis muaj kev tiv thaiv corrosion, tshuaj lom neeg hauv av yuav tsis ua rau muaj kev puas tsuaj ntawm cov kav dej, yuav tsis tshwm sim lwj, xeb thiab xeb.
yooj Yim
PE cov yeeb nkab xa dej ntev thaum tawg tshaj 800%, kev co hauv zos yuav tsis ua rau tag nrho cov yeeb nkab co, muaj zog tiv taus kev co. Qhov xwm txheej ntawm polyethylene tso cai rau PE cov yeeb nkab dej kom raug coiled, txo qhov xav tau ntau ntawm cov khoom siv txuas thiab tso cai rau kev tsim kho hla dhau cov teeb meem, txo qhov nyuaj ntawm kev tsim kho.
Siab tsis kam
Vim yog HDPE muaj crystallinity siab, lub zog thiab qhov tawv nce ntxiv. Thaum sib xyaw ua ke zoo, nws tuaj yeem tiv taus qhov siab sab hauv thiab feem ntau siv rau kev muab dej thiab hlawv cov kav dej siab.
Tu
Huv si thiab tsis muaj tshuaj lom, cov yeeb nkab tsis yug cov kab mob, yuav tsis ua rau muaj kuab paug rau dej ntxiv, daws tau tag nrho cov teeb meem ntawm cov yeeb nkab ua qias tuaj.
Kev muaj peev xwm
PE cov yeeb nkab xa dej du thiab sab hauv phab ntsa, me me coefficient ntawm kev sib txhuam, me me tsis kam rau kua, me me poob taub hau, tsis muaj scaling, txo qhov siab poob ntawm cov yeeb nkab thiab dej xa hluav taws xob siv, qhov zoo ntawm kev lag luam yog qhov pom tseeb.
Kev nyab xeeb ntawm cov yeeb nkab
Cov kav dej PE txuas nrog los ntawm kev sib xyaw kub thiab hluav taws xob, lub zog ntawm qhov sib txuas siab dua lub zog ntawm cov yeeb nkab nws tus kheej, uas tuaj yeem tiv taus lub zog ncig thiab axial uas tsim los ntawm lub siab sab hauv. Kev ua haujlwm sealing zoo heev uas tsis tas yuav txhawj txog kev xau vim yog kev cuam tshuam ntawm qhov sib txuas.