Polypropylene - yog dab tsi? Txhais, cov yam ntxwv ntawm cov khoom siv, kev siv hauv kev lag luam thiab lub neej txhua hnub

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Polypropylene muaj ntau niaj hnub no hauv ntau yam kev ua haujlwm ntawm tib neeg. Nws yog dab tsi, koj tuaj yeem paub los ntawm kev nyeem cov kab lus. Cov khoom no tau qhia los ntawm ob tsab ntawv loj PP thiab yog cov thermoplastic polymer ntawm propylene, uas tseem hu ua propene.

Definition

Nws yog tau los ntawm txoj kev ntawm propylene polymerization nrog kev koom tes ntawm cov hlau complex catalysts los ntawm hom Ziegler-Natta analogues. Cov tsis xav tau rau kev tsim cov polypropylene yog ze rau cov uas yuav tsum tau rau zus tau tej cov polyethylene tsis tshua muaj siab. Nyob ntawm seb cov catalyst siv, txhua hom polymer lossis sib xyaw ntawm cov polymers tuaj yeem tsim tau.

Yog tias koj txaus siab rau polypropylene, nws yog dab tsi ntawm cov yam ntxwv ntawm cov tshuaj lom neeg thiab cov khoom siv dav dav, koj yuav tsum paub tias cov tshuaj muaj cov hmoov dawb lossis granules. Qhov ceev ntawm qhov tom kawg txawv ntawm 0.4 mus rau 0.5 g / cm³. Cov khoom yog tsim xim thiabunpainted, stabilized.

Specifications

Yog tias peb piv polypropylene nrog polyethylene, thawj tus yog tsawg ntom, rau cov khoom no qhov taw qhia yog 0.90 g / cm3, uas yog tus nqi tsawg tshaj plaws rau cov yas. Cov khoom yog ib qho nyuaj, nws yog kub-resistant, resistant rau puas, softening pib ntawm +140 ˚С. Lub melting point yog +175 ˚С. Cov khoom siv zoo tiv thaiv kev ntxhov siab corrosion cracking.

Thaum kawm cov lus nug tias nws yog polypropylene, koj yuav tsum paub tias nws tiv taus lub teeb thiab oxygen, tab sis tus yam ntxwv no txo qis los ntawm kev qhia txog cov khoom stabilizers. Tus cwj pwm tensile ntawm ib yam khoom nyob ntawm qhov kub thiab txias thiab tus nqi ntawm daim ntawv thov ntawm lub load, uas manifests nws tus kheej mus rau ib tug ntau npaum li cas ntawm polyethylene. Nrog ib tug txo nyob rau hauv tus nqi stretching, qhov Performance index ntawm mechanical zog nce. Thaum qhov ntsuas no siab heev, qhov kev ntxhov siab tawg ua rau qis dua lub zog tensile tawm los.

Ntxiv nta

Polypropylene nthuav tawm tshuaj lom neeg. Nws tuaj yeem cuam tshuam tsuas yog los ntawm oxidizing cov neeg ua haujlwm xws li fuming nitric acid, oleum, chlorosulfonic (sulfuric monochloride) acid lossis halogens. 30% hydrogen peroxide thiab concentrated 58% sulfuric acid ua me ntsis thiab nyob rau hauv chav tsev kub. Kev tiv tauj tuaj yeem khaws cia nrog cov tshuaj reagents yam tsis muaj degradation ntawm cov polymer yog tias qhov kub ntawm +60 ˚C lossis qis dua.

Polypropylene swells hauvorganic kuab tshuaj nyob rau hauv chav tsev kub. Yog tias qhov kub siab tshaj 100 ˚С, cov khoom yuav yaj hauv cov pa roj carbon monoxide xws li toluene thiab benzene.

Siv hauv kev lag luam thiab lub neej txhua hnub

Hnub no, polypropylene muaj ntau heev. Nws yog dab tsi thiab siv cov khoom siv li cas, koj tuaj yeem nkag siab yog tias koj ua tib zoo saib ntawm thaj chaw ntawm nws daim ntawv thov. Cov khoom siv raw yog siv rau cov yeeb yaj kiab, cov kav dej, cov thawv ntim khoom thiab cov khoom siv cuab yeej siv. Cov khoom siv hauv tsev thiab ntau yam ntaub ntawv tsis-woven yog tsim los ntawm nws. Nws tsim lub hauv paus ntawm cov khoom siv hluav taws xob insulating, thiab hauv kev tsim kho nws yog siv los ua suab nrov thiab kev co rwb thaiv tsev ntawm cov plag tsev.

Polypropylene tau pom nws qhov dav dav hauv kev tsim cov "floating floor" system hauv lub neej txhua hnub. Tsis-crystallizable copolymer yog tau los ntawm polymerization ntawm propylene nrog ethylene. Yog li ntawd, cov khoom tau txais cov khoom ntawm cov roj hmab thiab muaj cov tshuaj tiv thaiv ntau ntxiv. Thaum lub sijhawm ua haujlwm, nws tiv thaiv kev laus.

zoo tshaj

Yog tias koj xav xaiv qhov zoo tshaj plaws polypropylene, koj yuav tsum nkag siab qhov teeb meem los ntawm cov ntsiab lus sib txawv. Ntawm lwm qhov kev lag luam, koj tuaj yeem nrhiav cov kav dej polypropylene los ntawm cov tuam txhab sib txawv. Tsuas yog cov lus pom zoo tau txais los ntawm cov khoom lag luam German, ntawm lwm lub tuam txhab los ntawm lub teb chaws Yelemees, nws yuav tsum raug sau tseg:

• Rehau;
• Aquatherm;
• Banninger;

Czech kavQhov thib ob, ntawm lawv ECOPLASTIC thiab FV-Plast sawv tawm. Qhov pheej yig tshaj thiab tsis zoo hauv cov khoom lag luam yog cov kav dej Turkish, koj tuaj yeem paub lawv los ntawm ib qho ntawm cov npe hauv qab no:

• TEBO;
• Vesbo;
• FIRAT;
• Jakko.

Tuam Tshoj tsis txaus siab rau qhov zoo, tab sis nyob rau hauv txoj cai no, ib yam li lwm yam, muaj kev zam. Suav polypropylene kav BLUE OCEAN tau ua pov thawj lawv tus kheej zoo. Koj tuaj yeem xaiv cov khoom lag luam zoo tshaj plaws rau lwm cov nta. Cov khoom yog ib txheej thiab ntau txheej. Cov tom kawg tso cai kom txo tau cov thermal elongation thiab ntxiv nrog cov ntawv ci. Cov kav dej zoo li no tuaj yeem raug perforated lossis du.

Koj tuaj yeem xaiv cov yeeb nkab zoo polypropylene raws li hom kev txhawb nqa. Qee zaum cov ntawv ci txheej yog nyob rau sab nraud. Lwm hom kev txhawb nqa yog ib txheej aluminium sab hauv. Nws tso cai rau koj mus txuas cov khaubncaws sab nraud povtseg yam tsis siv cov kua nplaum. Fiberglass kuj tseem siv rau kev txhawb nqa.

Pib diameters

Txhawm rau kom paub zoo dua nrog polypropylene, koj yuav tsum paub seb cov kav dej ntawm cov khoom no muaj dab tsi. Cov lus piav qhia tuaj yeem yog sab nraud thiab sab hauv. Qhov thib 1 txawv ntawm 16 mus rau 110 hli, thaum lub puab ib txawv ntawm 16.2 mus rau 90 hli. Yog tias peb xav txog qhov ntev ntawm cov kav dej kom ntxaws, ces cov phab ntsa tuab tuaj yeem sib txawv ntawm 1.9 txog 10 hli.

Raws li thaj chaw ntawm kev siv, cov kav dej loj loj yog siv rau kev tso dej, kav dej thiabcua sov rau cov neeg nyob ib puag ncig thiab cov tsev, cov chaw ua kis las, cov tsev rau pej xeem, nrog rau tsev so. Cov khoom zoo li no yog siv rau kev xav tau kev lag luam. Piv txwv li, yog tias txoj kab uas hla ntawm polypropylene yog 500 hli, cov yeeb nkab zoo li no yog siv los muab cov dej txias rau cov chaw hauv nroog los ntawm cov pas dej. Cov kav dej polypropylene tsis siv los hloov cov dej txias vim yog cov thermal load, uas ua rau softening ntawm cov kab polymer.

Kev piav qhia ntawm PP nplooj ntawv. Thaj chaw siv

Cov ntawv ntawm polypropylene yog siv rau kev thauj mus los thiab khaws cia ntawm alkalis thiab acids, nrog rau cov tshuaj vim tias cov khoom siv tau zoo tiv taus tshuaj, kub thiab lwm yam cuam tshuam. Nws ruaj khov thiab tuaj yeem siv rau hauv kev lag luam khoom noj khoom haus los khaws ntau yam kua thiab khoom noj. Cov ntawv zoo li no tuaj yeem yog monolithic lossis sib xyaw. Cov qub kuj hu ua homogeneous, thiab tom kawg yog lub teeb. Lawv muaj cov npuas dej sab hauv thiab sab nraud cov khoom zoo nkauj.

Ntawm cov khoom tseem ceeb yuav tsum tau qhia:

• rather low ntom;
• muaj zog heev;
• siab te tsis kam;
• zoo tshuaj tiv thaiv;
• kev nyab xeeb rau tib neeg thiab tsiaj noj qab haus huv;
• zoo machinability;
• kev ua tau zoo dielectric.

Txhim kho cua sov thiab cov kav dej

DIY los ntawmpolypropylene tuaj yeem tso cov cua sov hauv koj lub tsev lossis chav tsev. Cov khoom siv niaj hnub no yog pheej yig thiab haum lub teeb. Ua ntej pib ua haujlwm, nws yog ib qho tsim nyog los xaiv cov pob qij txha thiab xyuas seb yuav ua li cas rau nruab cov kav dej. Rau soldering, cov khoom yuav tsum tau txiav kom loj. Cov pob qij txha yuav tsum sib npaug thiab muaj lub kaum sab xis. Cov seem yog degreased, chips raug tshem tawm ntawm qhov chaw tom qab txiav.

Cov yeeb nkab tau nruab rau hauv qhov nruab nrab. Qhov no yuav ua tiav qhov tseeb geometric ntawm kev sib txuas. Tom qab ntawd cov fittings tau muab tso rau ntawm cov ntsiab lus docking. Polypropylene soldering yog nqa tawm siv lub inverter. Cov cuab yeej ua kom sov, tom qab ntawd koj tuaj yeem pib tswj.

Koj tuaj yeem siv hluav taws xob vuam couplings. Nyob rau hauv cov ntaub ntawv no, lub installation yog nqa tawm nyob rau hauv lawv. Yog tias tsim nyog los txuas cov khoom siv polypropylene rau cov kav hlau hlau, cov flanges yuav tsum tau siv. Ntawm qhov tod tes, lawv muaj xov rau tapping rau hauv cov kav hlau. Ntawm qhov tod tes, cov khoom lag luam muaj lub kaw lus du rau mounting ntawm yas.

Yog tias koj npaj yuav siv polypropylene rau cua sov, nws yog ib qho tseem ceeb rau kev txiav txim siab lub sij hawm vuam ntawm cov pob qij txha, uas yuav nyob ntawm txoj kab uas hla ntawm cov kav dej. Tag nrho cov ntsiab lus ntawm qhov system yog ua ntej coj mus rau hauv chav tsev. Lawv yuav tsum tau warmed mus rau chav tsev kub. Siv cov ntaub ntawv suav, koj yuav tsum tau muab cov chaw txiav rau ntawm qhov chaw ntawm cov khoom nrog lub cim. Kev ua haujlwm zoo tshaj plaws nrog txiab tshwj xeeb. Cov seem yog so nrog cawv. Siv daim ntaub qhuav kom tshem tawm cov av uas seem. Tom ntej no yog tig ntawm lub nozzle rau soldering hlau. Koj yuav tsum xaiv txoj kab uas tsim nyog. Lub nozzle yog degreased thiab ntsia horizontally. Nws yog cua sov rau 265 ˚С.

Cov yeeb nkab thiab qhov haum yog muab tso rau hauv lub qhov cub qhib. Cov khoom sib txuas yuav siv sij hawm los ua kom sov. Tom qab lawv raug tshem tawm ntawm cov khoom thiab cov yeeb nkab yog muab tso rau hauv qhov haum. Nyob rau theem no, nws yog ib qho tseem ceeb kom tiv taus lub sijhawm xav tau. Cov khoom yuav tsum tsis txhob kov kom txog thaum lawv txias tag.

Nyob hauv kaw

Polypropylene yog cov khoom siv tshuaj tiv thaiv. Tsuas yog qee cov kua qaub thiab oleum tuaj yeem cuam tshuam rau nws. Kev puas tsuaj ntawm polypropylene tsuas yog tshwm sim nrog kev sib cuag ntev nrog cov tshuaj reagents xws li sulfuric acid thiab hydrogen peroxide. Cov khoom o tuaj yeem tshwm sim hauv cov kuab tshuaj organic. Thaum sib cuag nrog cov pa roj carbon monoxide thiab qhov kub ntawm 100 ˚С thiab siab dua, kev sib cais tshwm sim.