PVC khoom

PVC, lub npe tag nrho ntawm Polyvinylchloride, cov khoom xyaw rau polyvinyl chloride (PVC), ntxiv rau mus koom lwm cov khoom xyaw los txhim kho nws cov cua kub tsis muaj zog, toughness thiab ductility, etc. Cov txheej sab saum toj ntawm lub nplaum zaj duab xis yog lacquer, lub ntsiab feem hauv nruab nrab yog polyvinyl chloride, thiab hauv qab txheej yog rov qab coated nplaum. Nws yog ib qho khoom siv nrov thiab dav siv hluavtaws hauv ntiaj teb niaj hnub no. Nws yog qhov thib ob siv hluavtaws cov khoom nyob hauv lub ntiaj teb. Raws li kev txheeb cais, hauv xyoo 1995, PVC tau tsim txog 5 lab tons hauv Tebchaws Europe, thiab nws tau siv 5,3 lab tons. Nyob rau hauv lub teb chaws Yelemees, qhov nruab nrab qhuav thiab tau ntawm PVC yog 1.4 lab tons. PVC yog tau ua thiab siv thoob ntiaj teb nrog kev loj hlob ntawm 4%. Feem ntau ntawm PVC hauv cov teb chaws Asmeskas sab hnub tuaj tshwj xeeb tshaj yog, ua tsaug rau qhov kev xav tau yooj yim rau kev tsim kho vaj tse nyob rau sab hnub tuaj Asia. PVC yog cov khoom tsim rau tsim tawm 3d nto zaj duab xis.

PVC tau xub pom los ntawm Henri Victor Regnault hauv Fabkis xyoo 1835. Cov khoom tshiab tau tshwm sim hauv 1872 los ntawm lwm tus kws tshawb fawb German, Eugen Baumann. Lub sijhawm ntawd, cov khoom siv ntawm PVC yog xim dawb, uas yog lub zog zoo heev thiab tsis muaj daim ntawv thov. Thaum pib ntawm lub xyoo pua 20, ib pab pawg neeg ntawm Lavxias teb sab chemists, Ivan Ostromislensky thiab Fritz Klatte, sim hloov lub fragility ntawm PVC mus rau hauv ib yam khoom muag tab sis tsis tau tejyam.

Kom txog thaum xyoo 1926, Tebchaws Asmeskas Waldo Semon (BF Goodrich) ntawm PVC tau muab coj los ua ke thiab thov kom tau txais ib daim ntawv patent hauv peb, nws los ntawm kev siv ntau yam khoom siv los daws cov teeb meem ntawm PVC, nce expansibility ntawm cov khoom siv PVC, lub hauv paus ntawm cov khoom lag luam. Xyoo 1931, lub tebchaws tau pib tsim PVC los ntawm emulsion, thiab xyoo 1941, Tebchaws Meskas pib tsim cov qauv ntawm PVC los ntawm ntab dej. Yog li ntawd, cov khoom siv rau PVC cov ntaub ntawv pib siv dav siv nyob rau hauv ntau lawm thiab lub neej daim ntaub ntawv. Nrog rau kev nthuav dav ntawm science thiab technology, cov khoom siv thiab synthesis ntawm PVC tau raug hloov los ntawm ontology synthesis method, uas ua rau nws ntau dua thiab zoo heev txo cov nqi.

Qhov yooj yim nta

Qhov ceev ntawm PVC ntshiab yog 1.4 g / cm cubed, thiab cov yas ntawm PVC yas qhov chaw nrog cov yas yas thiab cov fillers yog feem ntau 1.15-2.00g / cm cubed.

PVC khoom

PVC khoom

Cov tshuaj tsw qab polyvinyl chloride zoo tensile, flexural, compressive thiab tej zaum kuj, thiab yuav siv tau raws li cov ntaub ntawv structural ib leeg.

Lub softness, txhawm rau elongation thiab txias tsis kam ntawm polyvinyl chloride yuav nce, tab sis lub brittleness, hardness thiab tensile lub zog yuav txo.

PVC muaj hluav taws xob rwb thaiv tsev zoo, yuav siv tau raws li khoom tsawg zaus rwb thaiv tsev, nws cov khoom siv tshuaj ruaj khov zoo. Vim muaj cov thermal stability ntawm polyvinyl chloride (PVC), cua kub ntev ntev yuav ua rau decompose, tso HCL roj, discoloring polyvinyl chloride (PVC), yog li ntawd nws daim ntawv thov yog nqaim, siv qhov feem ntau ntawm 15 txog 55 degrees .

PVC yog polyvinyl chloride, ib cov khoom tsim los ntawm 43 feem pua roj thiab 57 feem pua ntsev. Piv nrog rau lwm hom khoom yas, PVC SIV ntaub ntawv zoo dua thiab txo cov roj noj. Tib lub sijhawm, lub zog siv ntawm PVC kev lag luam yog qhov tsawg kawg nkaus. Thiab nyob rau theem tom qab ntawm kev siv cov khoom siv PVC, nws tuaj yeem siv dua qub thiab hloov mus rau lwm cov khoom tshiab los yog raug hluav taws xob.

Lub cev lub cev

Cov kev faib ua feem ntawm

1.38 g / cm3, molding shrinkage tus nqi: 0.6 1.5%, moulding kub: 160-190 ℃, melting point 212 ℃.

Cov yam ntxwv ntawm

Mechanical zog, zoo hluav taws xob cov khoom, muaj zog acid thiab alkali tsis kam, stability tshuaj zoo, tab sis lowening taw tes. Haum kev ua kom nyias nyias, xaim hlau thiab thaiv kab thaiv, txheej qhov chaw, thiab lwm yam.

Moulding yam ntxwv

Amorphous khoom, noo absorption, liquidity yog pluag. Thiaj li yuav ua kom lub liquidity, tiv thaiv npuas, yas tuaj yeem qhuav. Cov txheej txheem pwm gear yuav tsum luv, lub qhov rooj tsim nyog yuav tsum loj, tsis muaj lub ces kaum. Pwm txias, plating txheej chromium;

2. Vim nws qhov txhauv thiab qhov dej, nws zoo dua yog siv cov cuab yeej tshwj xeeb thiab tuaj pwm. Tag nrho cov khoom yuav tsum muab nrog ntau hom thiab ntau ntawm cov khoom siv ntxiv raws li xav tau;

3. Nws yog yooj yim decompose, thiab nws yog yooj yim decompose nrog hlau nyob rau ntawm ib tug kub ntawm 200 degrees.

4. Thaum siv cov thawv hnoos tsis muaj cav, lub aperture yuav tsum loj kom tiv thaiv tau tuag lub siab. Nws yog zoo dua tsis mus nqa inserts, yog tias muaj, preheat lub inserts.