Khoom siv ntawm kev tsim kho (Thermoplastics)

Cov Khoom Siv Khoom Siv (Thermoplastics): Polymer® PTFE (Polytetrafluoroethylene), PVDF (Polyvinylidene Fluoride), PP (Polypropylene), CPVC (Chlorinated Polyvinyl Chloride), PVC (Polyvinyl Chloride)

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PVC (Polyvinyl Chloride)

Kev lag luam thiab kev xaiv loj tshaj plaws ntawm Chemline li qub yog molded los ntawm PVC.Nws muaj cov khoom siv kho tshuab thiab tshuaj lom neeg zoo heev ntawm tus nqi qis.Kev ua haujlwm kub ntawm PVC li qub yog 0 txog 60 ° C (30 txog 140 ° F).PVC siv rau Chemline li qub yog txheeb xyuas los ntawm cov xov tooj ntawm tes 11564-A raws li ASTM Standard D 1784. Cov lus "A" yog hais txog cov tshuaj tiv thaiv siab tshaj plaws.Feem ntau lwm cov PVC li qub nrog rau cov yeeb nkab thiab fittings tsuas muaj "B" tshuaj tiv thaiv kev ntsuas.Qhov tshwj xeeb PVC "A" compound siv hauv Chemline li qub tiv thaiv cov kua qaub feem ntau, muaj zog alkalais, ntsev thiab ntau lwm yam tshuaj.Cov tshuaj tiv thaiv siab ntawm cov khoom siv no tso cai rau nws daim ntawv thov ntawm cov kev pabcuam nruj xws li 98% H2 SO4 , cov tshuaj chlorine qhuav thiab tsis tshua muaj siab ntub dej chlorine gas.PVC raug tawm tsam los ntawm chlorinated hydrocarbons, ketones, esters thiab qee cov tshuaj tsw qab.Nws tuaj yeem siv rau cov kev daws teeb meem uas muaj txog li 1000 ppm cov kuab tshuaj.Chemline PVC li qub tsis muaj tshuaj lom.Lawv ua tau raws li CSA tus qauv B137.0 rau toxicity.Lawv tiv taus kev puas tsuaj ntawm tshav ntuj thiab huab cua, yog li kev pleev xim tsis tsim nyog.

CPVC (Chlorinated Polyvinyl Chloride)

CPVC zoo ib yam li PVC hauv txhua yam khoom thiab tshuaj lom neeg.Nws yog tsim rau cov ntawv thov los ntawm 0 txog 95 ° C (30 txog 200 ° F).Qhov tshwj xeeb CPVC compound siv rau Chemline li qub yog cais raws li 23567-A raws li ASTM D 1784. Cov lus "A" qhia txog kev ua raws li cov tshuaj siab tshaj plaws. tsis kam ntsuas.Cov compound no tsis muaj tshuaj lom, ua raws li CSA toxicity standard B137.0.CPVC li qub tau ua pov thawj tias yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov ntawm qhov kub siab dhau rau PVC lossis thaum yuav tsum muaj kev nyab xeeb ntxiv.

PP (polypropylene)

PP yog lub teeb yuag thiab siab nyob rau hauv tshuaj lom neeg.Valves yog tsim rau kev pabcuam ntawm -20 txog 90 ° C (-5 ° txog 195 ° F).PP tsis cuam tshuam los ntawm alkalais, ntsev, organic solvents thiab feem ntau cov kua qaub, tshwj xeeb tshaj yog hydrochloric thiab phosphoric acid.Nws tsis tsim nyog rau cov kua qaub uas muaj zog, chlorinated hydrocarbons, cov tshuaj tsw qab thiab cov ntsiab lus siab ntawm cov tshuaj dawb chlorine.PP yog inert heev yog li nrov rau cov ntaub ntawv purity siab xws li dej deionized, thiab lwm yam. Kev nkag mus ntawm ultraviolet lub teeb.Ntuj translucent cov khoom tsis muaj xim yuav degrade yog tias raug UV teeb (hnub ci).Chemline muaj PP yeeb nkab, fittings thiab li qub nyob rau hauv pigmented thiab unpigmented PP, ob leeg pom zoo los ntawm FDA rau kev sib cuag nrog zaub mov.

PVDF (Polyvinylidene Fluoride)

PVDF yog qhov zoo tshaj rau lwm cov khoom siv thermoplastics hauv tshuaj tiv thaiv thiab kev puas tsuaj.Nws muaj lub zog zoo kawg nkaus tshaj qhov kub ua haujlwm loj tshaj plaws.Kev ua haujlwm kub ntawm PVDF li qub yog -40 txog 120 ° C (-40 txog 250 ° F) PVDF qhov cuam tshuam lub zog yog ntau dua ob npaug ntawm PVC.Cov li qub tsis tshua muaj zog nyob rau hauv kev tsim txom txhua yam txawm tias ntawm -40 ° F.Lawv kuj muaj qhov ua kom zoo tshaj plaws ntawm cov thermoplastic li qub.PVDF muaj cov tshuaj tiv thaiv zoo tiv thaiv halogens xws li chlorine thiab bromine, muaj zog acids xws li hydrofluoric thiab nitric acids, organic solvents thiab roj.PVDF tsis tiv taus kub hauv paus.Nws kuj tsis muaj tshuaj lom thiab tsis muaj ntxhiab tsw lossis saj rau hauv cov kua.Peb PVDF ua raws li USDA Title 21, P121.2593 cov cai rau kev sib cuag nrog zaub mov.Gas permeability ntawm PVDF yog tsawg heev.Lub patented PVDF gas permeability barrier muaj nyob rau ntawm hom 14 thiab DV Series Diaphragm li qub.Nws yog kev txhawb nqa rau polymer® diaphragm thiab tau ua pov thawj los ua kom lub neej ntawm cov diaphragm li qub ntawm cov tshuaj chlorine thiab cov kev pabcuam muaj zog acid.

Polymer® PTFE (Polytetrafluoroethylene)

PTFE yuav luag tag nrho insoluble thiab tshuaj inert.Nws muaj qhov kub thiab txias tsis kam.Polymer® PTFE pob lub rooj zaum, vim lub ntuj lubrication, yuav tsum tsis muaj lubrication.Polymer® PTFE diaphragms thiab flange gaskets yog siv rau hauv kev siv tshuaj lom neeg hnyav tshaj plaws.