Txog cov yeeb nkab extrusion kab ntxiv rau PPR, lwm cov kev faib tawm ntawm PP (polypropylene) yeeb nkab yog dab tsi?

Polypropylene (PP) yog ib qho thermoplastic ua los ntawm polymerization ntawm propylene, nrog rau kev rwb thaiv hluav taws xob zoo, tshuaj lom neeg tsis kam, tiv taus cua sov (txawm hais tias tsis zoo li qee cov yas kub siab), lub zog tensile thiab kev cuam tshuam tsis kam.

Raws li qhov tseeb version ntawm ISO 15874-2-2013 thoob ntiaj teb cov qauv

Cov kav dej kub thiab txias polypropylene muaj plaub lub ntsiab PP-H, PP-B, PP-R thiab PP-RCT, thiab qhov kev txiav txim no kuj tuaj yeem pom tias yog kev txiav txim rov ua dua ntawm cov khoom, kev ua tau zoo ntawm ntau dua thiab ntau dua, tab sis kuj muaj lawv tus kheej lub zog, cov hauv qab no yuav tsum tau qhia:

Ua ntej, PP-H yeeb nkab yas yeeb nkab extrusion kab (feem ntau hu ua hom I polypropylene)

Introduction: PPH yeeb nkab (Polyproplyene-Homo homopolymer polypropylene yeeb nkab), feem ntau hu ua Hom I polypropylene, yog cov khoom siv PP ib txwm rau kev hloov kho beta, yog li nws muaj cov qauv siv lead ua Beta zoo sib xws thiab mos.

nta: Tshuaj lom neeg zoo heev, tiv taus kev sib txhuam, rwb thaiv tsev zoo, tiv taus kub siab, qhov kub ua haujlwm tuaj yeem ncav cuag 100 ℃, tsis muaj tshuaj lom, lub teeb yuag, qhov no yog cov khoom zoo dua li PP yeeb nkab kub siab, tiv taus corrosion, tiv thaiv kev laus.

pab: Cov ntaub ntawv yeeb nkab PPH muaj kev tiv thaiv cua sov zoo heev thiab tiv thaiv xeb, yog li lawv feem ntau siv rau hauv cov txheej txheem thauj dej kub, xws li kev muab dej kub, cov txheej txheem cua sov, thiab cov txheej txheem yeeb nkab kev lag luam tshuaj lom neeg corrosive.

Qhov thib ob, PP-B yeeb nkab (feem ntau hu ua hom II polypropylene)

Introduction: Cov yeeb nkab PP-B yog ua los ntawm cov polypropylene copolymer thaiv, feem ntau hu ua Hom II polypropylene, PP-B muaj cov ntsiab lus siab ntawm ethylene copolymer, muab PP-B yeeb nkab tiv taus qhov kub qis dua, yog li nws tseem tuaj yeem tswj tau qhov tawv ntawm qhov kub qis, tsis yooj yim tawg lossis ua brittle.

nta: PP-B feem ntau poob qee yam ntawm nws cov khoom kub siab piv rau lwm hom polypropylene. Qhov no yog vim tias qhov muaj ethylene copolymers txo qhov melting point ntawm PP-B, yog li nws tsis kam rau qhov kub siab zoo li PP-H.

siv: Cov yeeb nkab PP-B feem ntau siv rau hauv cov kav dej rau kev muab dej txias thiab dej kub dav dav, xws li cov kav dej kais rau kev tsim kho, kev nyob thiab kev lag luam. Nws kuj tseem siv rau hauv kev lag luam tshuaj rau cov kav dej siv los thauj ntau yam tshuaj uas tsis xeb, kua qaub, alkalis thiab cov kuab tshuaj.

Nco ntsoov: PP-B feem ntau tsis haum rau cov ntawv thov uas xav tau kev tswj hwm cov dej kub lossis cov tshuaj lom neeg, vim nws yuav ua rau mos lossis poob nws cov khoom siv kho tshuab ntawm qhov kub siab.

Qhov thib peb, PP-R yeeb nkab (feem ntau hu ua Hom III polypropylene)

Introduction:PP-R (polypropylene random) yeeb nkab, tseem hu ua tripropylene polypropylene yeeb nkab, random copolymer polypropylene yeeb nkab, yog ib hom yeeb nkab siv random copolymer polypropylene ua raw khoom.

nta: PP-B feem ntau poob qee yam ntawm nws cov khoom kub siab piv rau lwm hom polypropylene. Qhov no yog vim tias qhov muaj ethylene copolymers txo qhov melting point ntawm PP-B, yog li nws tsis kam rau qhov kub siab zoo li PP-H.

siv: Cov yeeb nkab PP-B feem ntau siv rau hauv cov kav dej rau kev muab dej txias thiab dej kub dav dav, xws li cov kav dej kais rau kev tsim kho, kev nyob thiab kev lag luam. Nws kuj tseem siv rau hauv kev lag luam tshuaj rau cov kav dej siv los thauj ntau yam tshuaj uas tsis xeb, kua qaub, alkalis thiab cov kuab tshuaj.

Nco ntsoov: PP-B feem ntau tsis haum rau cov ntawv thov uas xav tau kev tswj hwm dej kub lossis tshuaj lom neeg, vim nws yuav ua rau mos lossis poob nws cov khoom siv kho tshuab ntawm qhov kub siab.

Qhov thib peb, PP-R yeeb nkab (feem ntau hu ua Hom III polypropylene)

Introduction: PP-R (polypropylene random) yeeb nkab, tseem hu ua tripropylene polypropylene yeeb nkab, random copolymer polypropylene yeeb nkab, yog ib hom yeeb nkab siv random copolymer polypropylene ua raw khoom.

nta: Nws ua rau cov khoom zoo ntawm PP-H thiab PP-B tsis muaj zog, uas tuaj yeem tiv taus qee qhov kub siab thiab txhim kho qhov tsis kam rau qhov kub qis, nrog rau muaj kev tiv taus zoo dua, ua rau nws yog cov khoom siv raw uas xav tau ntau dua uas tuaj yeem siv dav hauv cov dej kub thiab dej txias.

siv: Cov tshuab dej txias thiab dej kub ntawm cov tsev, cov tshuab cua sov, thiab cov tshuab dej ntshiab.