PVC cob
Raws li 15 xyoo PVC Additives tsim thiab chaw muag khoom, peb ua tau zoo tshaj plaws los muab kev pabcuam nres rau cov neeg siv khoom taw qhia, yog li peb tau tsim ib chav ua lag luam rau PVC cob, tam sim no peb yog tus neeg sawv cev ntawm Tuam Tshoj lub ntsiab PVC cob pawg.
Polyvinyl chloride yog ib qho polymerized los ntawm vinyl chloride monomer (VCM) nyob rau hauv lub xub ntiag ntawm peroxide, azo compound thiab lwm yam pib los yog nyob rau hauv qhov kev txiav txim ntawm lub teeb thiab kub raws li lub dawb radical polymerization mechanism. Vinyl chloride homopolymer thiab vinyl chloride copolymer yog sau ua ke hu ua vinyl chloride resin.
PVC yog cov hmoov dawb nrog cov qauv amorphous, nrog rau cov ntawv me me. Lub iav hloov pauv kub yog 77 ~ 90 degree, thiab nws pib decompose ntawm txog 170 degree. Nws muaj kev ruaj ntseg tsis zoo rau lub teeb thiab cua sov. Thaum nws nyob saum 100 degree lossis raug lub hnub ntev, nws yuav decompose los tsim hydrogen chloride, thiab ntxiv autocatalytic decomposition yuav ua rau cov xim hloov, thiab nws lub cev thiab txhua yam khoom yuav poob sai sai. Hauv kev siv cov tswv yim, stabilizer yuav tsum tau ntxiv los txhim kho kev ruaj ntseg rau cov cua sov thiab lub teeb.
PVC yog ib qho ntawm cov khoom loj tshaj plaws hauv ntiaj teb ntawm cov khoom siv dav dav, uas yog siv dav. Nws yog dav siv hauv cov khoom siv hauv tsev, cov khoom lag luam, cov khoom siv niaj hnub, cov tawv tawv hauv pem teb, cov vuas hauv pem teb, tawv tawv, cov kav dej, cov xov hlau thiab cov cables, ntim cov yeeb yaj kiab, lub raj mis, cov ntaub ntawv foaming, sealing cov ntaub ntawv, fibers, thiab lwm yam.
| Specification thiab kev siv ntawm PVC cob GB/T 5761-93 |
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| tus naj npawb | Qauv nab npawb hauv Index lev L qhov project |
SG 1 | SG2 | SG3 | SG4 | SG5 | SG6 | SG7 | SG8 | |
| Cov khoom zoo tshaj | Cov khoom zoo tshaj | Cov khoom zoo tshaj | Cov khoom zoo tshaj | Cov khoom zoo tshaj | Cov khoom zoo tshaj | Cov khoom zoo tshaj | Cov khoom zoo tshaj | |||
| 1 | Qhov hnyav, ml / g (los yog K tus nqi) (los yog nruab nrab degree ntawm kev sib sau) |
156-144 （77-75） |
143-136 （74-73） |
135-127 (72-71) {1350-1250} |
126-119 (70-69) {1250-1150} |
118-107 (68-66) {1100-1000} |
106-96 (65-63) {950-850} |
95-87 (62-60) {850-750} |
86-73 (59-55) {750-650} |
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| 2 | Tus naj npawb ntawm impurity hais, pcs | 16 | 16 | 16 | 16 | 16 | 16 | 20 | 20 | |
| 3 | Volatile (xws li dej) cov ntsiab lus, feem pua | 0.30 | 0.30 | 0.30 | 0.30 | 0.40 | 0.40 | 0.40 | 0.40 | |
| 4 | Pom tseeb qhov ceev, g / ml | 0.45 | 0.45 | 0.45 | 0.45 | 0.45 | 0.48 | 0.48 | 0.48 | |
| 5 | Sieve residue feem pua | 0.25 hli sieve qhov | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
| 0.063 sieve qhov feem pua | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | ||
| 6 | Tus naj npawb ntawm "fisheyes", pcs / 400cm2 | 20 | 20 | 20 | 20 | 20 | 20 | 30 | 30 | |
| 7 | Dawb (160 degree, tom qab 10min), feem pua | 74 | 74 | 74 | 74 | 74 | 74 | 70 | 70 | |
| 8 | Residual chlorene ntsiab lus PPm | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | |
| Kev siv tseem ceeb | Advanced rwb thaiv tsev cov ntaub ntawv, thiab lwm yam | Cov khoom siv hluav taws xob insulating, nyias zaj duab xis, cov khoom muag muag | Hluav taws xob rwb thaiv tsev cov ntaub ntawv ua liaj ua teb zaj duab xis, ua liaj ua teb hose, zoo tib yam hose, dag tawv nto, khau khiab, cov khoom muag muag | Kev lag luam thiab kev ua liaj ua teb zaj duab xis, hose dag tawv, cov khoom siv lub raj muaj zog | Cov khoom pob tshab, cov ntawv tawv tawv tawv, monofilament, casing, profile, yas steel qhov rooj thiab qhov rais, thiab lwm yam | Cov ntaub ntawv, cov ntawv pob tshab, daim hlau nyuaj, electrode fibers, thiab lwm yam | Lub raj mis, cov ntawv pob tshab, cov khoom siv txhaj tshuaj nruj, perchlorethylene resin, thiab lwm yam | Lub raj mis, cov ntawv pob tshab, cov khoom siv txhaj tshuaj nruj, perchlorethylene resin, thiab lwm yam | ||