daim ntawv thov

CovPVC cevformulation muaj: PVC resin, cuam tshuam kev hloov kho, stabilizer, kev hloov kho, muab tub lim, xim thiab lwm yam roj nplua nyeem.

1. PVC cob

Txhawm rau kom tau txais cov yas yas sai thiab zoo ib yam, cov txheej txheem ncua kev kawm yuav tsum tau siv los loosen cov resin.

——Cov khoom siv rau ob phab ntsa corrugated kav yuav tsum muaj cov khoom hnyav molecular tis thiab impurity cov ntsiab lus, thiaj li yuav txo tau "ntses qhov muag" nyob rau hauv cov yeeb nkab thiab zam lub cev qhuav dej ntawm cov yeeb nkab corrugation thiab rupture ntawm cov yeeb nkab phab ntsa.

——Cov resin siv rau cov kav dej yuav tsum yog "qib huv", thiab cov vinyl chloride residual nyob rau hauv cov resin yuav tsum tsis pub dhau 1 mg / kg.Txhawm rau kom ntseeg tau qhov zoo ntawm cov yeeb nkab thiab txo qhov tsis xws luag, qhov chaw ntawm cov resin yuav tsum ruaj khov.

2. Stabilizer

Tam sim no, lub ntsiab cua sov stabilizers siv nyob rau hauv Tuam Tshoj yog: hlau soaps, composite lead ntsev stabilizers, tsis tshua muaj ntiaj teb composite stabilizers, thiab organic tin stabilizers.

Cov tshuaj stabilizers uas muaj cov hlau hnyav (xws li Pb, Ba, Cd) muaj kev phom sij rau tib neeg kev noj qab haus huv, thiab qhov ntau npaum li cas ntawm cov stabilizers hauv kev tsim cov kav dej yog txwv.Nyob rau hauv cov txheej txheem ib leeg-ntsia hlau extrusion, cov cua kub keeb kwm ntawm cov khoom yog ntev tshaj qhov uas nyob rau hauv lub ntxaib-ntsia hlau extrusion txheej txheem, thiab tus nqi ntawm stabilizer nyob rau hauv lub qub yog nce los ntawm ntau tshaj 25%.Qhov kub ntawm lub taub hau ntawm ob phab ntsa corrugated yeeb nkab yog siab dua, cov khoom nyob twj ywm nyob rau hauv lub taub hau rau lub sij hawm ntev, thiab tus nqi ntawm stabilizer nyob rau hauv cov mis yog ntau dua li cov qauv yeeb nkab zoo tib yam.

3. Filler

Lub luag haujlwm ntawm fillers yog txo cov nqi.Sim siv ultra-fine active fillers (tus nqi siab dua).Tus nqi ntawm cov khoom siv yeeb nkab yog loj dua li ntawm cov profiles.Ntau tus neeg muab tub lim ntau dhau yuav ua rau qhov cuam tshuam tsis kam txo thiab lub siab ua haujlwm ntawm cov yeeb nkab yuav txo qis.Yog li ntawd, nyob rau hauv cov kav dej tshuaj thiab cov kav dej, tus nqi ntawm cov muab tub lim hauv tsawg dua 10 daim ntawv.Tus nqi ntawm cov muab tub lim hauv cov kav dej thiab lub tsho txias-tsim threading tuaj yeem ua tau ntau dua, thiab cov nyiaj CPE tuaj yeem nce ntxiv los hloov qhov poob ntawm kev ua haujlwm.

Rau cov kav dej uas yuav tsum tau qis dua rau cov yeeb nkab kev ua tau zoo, thiab cov kav dej nag, cov khoom muab tub lim tuaj yeem loj, tab sis kev hnav ntawm ntxaib-ntsia hlau extruder yog qhov hnyav.

4. Hloov kho

(1) Kev hloov kho: cov kav dej zoo tib yam tuaj yeem siv tsawg dua lossis tsis;corrugated kav thiab nyias-walled kav feem ntau yog siv.

(2) Impact modifier: tsawg npaum li cas tshaj profiles, rau ob qho laj thawj: 1. Kev ua tau zoo, tsis kub tsis kam, tensile zog 2. Tus nqi

(3) Lwm yam additives, xim, thiab lwm yam .: Thaum lub profile yog siv los tiv thaiv kev laus, titanium dioxide yuav tsum tau ntxiv.Cov qauv ntawm cov yeeb nkab PVC nruj yog cov xim xim, feem ntau yog titanium dioxide lossis carbon dub, uas tuaj yeem xaiv raws li qhov xav tau ntawm cov yeeb nkab.

5. Kev sib txuam ntawm cov roj nplaum sab nraud thiab stabilizer

(1) Xaiv cov roj nplua nyeem zoo sib xws raws li lub stabilizer

ib.Organotin stabilizer.Cov organic tin stabilizer muaj kev sib raug zoo nrog PVC resin, thiab muaj lub siab nyiam ua raws li cov phab ntsa hlau.Qhov pheej yig tshaj sab nrauv lubricant uas phim nws yog paraffin-based paraffin-calcium stearate system.

b.Lead ntsev stabilizer.Lead ntsev stabilizer tsis zoo sib xws nrog PVC resin, thiab tsuas yog txuas mus rau ntawm PVC hais, uas cuam tshuam cov fusion ntawm PVC hais.Feem ntau, txhuas stearate-calcium stearate sab nraud lubricant yog siv los ua kom haum nws.

(2) Tus nqi ntawm cov roj nplua nyeem sab nraud.Yog tias kho cov roj nplua nyeem sab nraud tseem tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm cov khoom siv, koj tuaj yeem txiav txim siab ntxiv me me ntawm cov roj nplaum sab hauv.Thaum cov kev cuam tshuam toughening modifier yog siv, vim lub siab yaj viscosity, muaj peev xwm ntawm adhesion rau cov hlau nto yog siab, thiab tus nqi ntawm cov lubricant sab nrauv feem ntau yuav tsum tau nce;Cov yeeb nkab tuab-walled yuav tsum muaj roj nplua nyeem ntxiv.Thaum cov txheej txheem kub yog siab, qhov nyiam ntawm cov yaj kom ua raws li cov hlau saum npoo yog siab, thiab ntxiv lubricants sab nraud ntxiv.

Cov kav dej PVC ua li cas?

PVC kav yog tsim los ntawm extrusion ntawm raw cov ntaub ntawv PVC, thiab feem ntau ua raws li tib cov kauj ruam ntawm raug cov yeeb nkab extrusion hauj lwm:

• Pub cov khoom nyoos pellets / hmoov rau hauv PVC ntxaib ntsia hlau extruder
• Melting thiab cua sov hauv ntau thaj chaw extruder
• Extruding los ntawm qhov tuag mus rau hauv cov yeeb nkab
• Txias ntawm cov yeeb nkab zoo li qub
• Txiav ntawm PVC kav mus rau qhov ntev ntev