PP polypropylene
Hom kev siv ntau yam:
Automotive kev lag luam (tsuas yog siv PP uas muaj cov khoom siv hlau: cov av nkos, qhov cua nkag, kiv cua, thiab lwm yam), cov khoom siv (lub tshuab ntxhua khaub ncaws lub qhov rooj, lub tshuab ziab khaub ncaws, tshuab ntxhua khaub ncaws thiab npog, lub qhov rooj tub yees, thiab lwm yam), Nyiv Siv cov khoom siv ( nyom thiab vaj khoom siv xws li
Lawn mowers thiab sprinklers, thiab lwm yam).
Txhaj pwm txheej txheem txheej txheem:
Kev kho kom qhuav: Yog tias khaws cia kom zoo, tsis tas yuav kho kom qhuav.
Melting kub: 220 ~ 275 ℃, ceev faj tsis txhob siab tshaj 275 ℃.
Pwm kub: 40 ~ 80 ℃, 50 ℃ yog pom zoo.Lub degree ntawm crystallization yog tsuas yog txiav txim los ntawm pwm kub.
Txhaj siab: mus txog 1800bar.
Kev txhaj tshuaj nrawm: Feem ntau, kev siv cov kev txhaj tshuaj siab ceev tuaj yeem txo qhov siab sab hauv kom tsawg.Yog tias muaj qhov tsis xws luag ntawm qhov chaw ntawm cov khoom, kev txhaj tshuaj qis qis ntawm qhov kub siab dua yuav tsum tau siv.
Cov neeg khiav dej num thiab cov rooj vag: Rau cov neeg khiav dej num txias, qhov kev khiav hauj lwm txoj kab uas hla yog 4 ~ 7 hli.Nws raug nquahu kom siv lub voj voog txhaj tshuaj chaw nres nkoj thiab khiav.Txhua hom rooj vag tuaj yeem siv tau.Lub rooj vag dav dav li ntawm 1 txog 1.5mm, tab sis cov rooj vag me me li 0.7mm kuj siv tau.Rau ntug rooj vag, qhov tsawg kawg nkaus qhov rooj qhov tob yuav tsum yog ib nrab ntawm phab ntsa thickness;qhov tsawg kawg nkaus qhov dav yuav tsum yog tsawg kawg yog ob zaug ntawm phab ntsa thickness.Cov khoom siv PP tuaj yeem siv qhov kub khiav.
Chemical thiab Physical Properties:
PP yog cov khoom siv semi-crystalline.Nws yog ib qho nyuaj tshaj li PE thiab muaj cov ntsiab lus melting ntau dua.Txij li thaum homopolymer PP yog nkig heev thaum qhov kub siab tshaj 0 ° C, ntau cov khoom lag luam PP yog random copolymer nrog 1 txog 4% ethylene los yog clamp copolymer nrog cov ntsiab lus ethylene siab dua.Cov khoom siv copolymer PP muaj qis dua thermal distortion kub (100 ° C), tsis muaj pob tshab, tsis tshua muaj gloss, tsis tshua muaj rigidity, tab sis muaj zog cuam tshuam lub zog.Lub zog ntawm PP nce nrog qhov nce ntawm cov ntsiab lus ethylene.Vicat softening kub ntawm PP yog 150 ° C.Vim lub siab crystallinity, nto rigidity thiab khawb kuj ntawm cov khoom no zoo heev.PP tsis muaj teeb meem ntawm ib puag ncig kev ntxhov siab tawg.Feem ntau, PP yog hloov los ntawm kev ntxiv iav fiber ntau, hlau additives los yog thermoplastic roj hmab.Tus nqi ntws MFR ntawm PP yog li ntawm 1 txog 40. PP cov ntaub ntawv uas tsis tshua muaj MFR muaj kev cuam tshuam zoo dua tab sis qis dua elongation lub zog.Rau cov ntaub ntawv nrog tib MFR, lub zog ntawm cov copolymer hom yog siab dua li homopolymer hom.Vim crystallization, qhov shrinkage ntawm PP yog siab heev, feem ntau 1.8 ~ 2.5%.Thiab cov kev taw qhia uniformity ntawm shrinkage yog zoo dua li ntawm PE-HD thiab lwm yam ntaub ntawv.Ntxiv 30% ntawm iav additives tuaj yeem txo qhov shrinkage rau 0.7%.Ob homopolymer thiab copolymer PP cov ntaub ntawv muaj cov dej noo zoo heev, acid thiab alkali corrosion kuj, thiab solubility kuj.Txawm li cas los xij, nws tsis muaj qhov ua rau muaj ntxhiab hydrocarbons (xws li benzene) cov kuab tshuaj, chlorinated hydrocarbons (carbon tetrachloride) cov kuab tshuaj, thiab lwm yam. PP tsis muaj oxidation tsis kam ntawm qhov kub thiab txias zoo li PE.

Pebyas diav, yas kuaj tubes, qhov ntswg inhalersthiab lwm yam khoom uas nkag mus rau hauv tib neeg lub cev siv PP cov ntaub ntawv.Peb muaj cov ntaub ntawv kho mob PP thiab cov khoom noj PP.Vim tias cov khoom siv PP tsis muaj tshuaj lom.