Cov ntaub ntawv dab tsi yog siv rau hauv cov nplaim hluav taws xob thiab cov cables?

Nplaim retardant hlau, hais txog cov hlau uas muaj hluav taws kub retardant tej yam kev mob, feem ntau nyob rau hauv cov ntaub ntawv ntawm kev ntsuam xyuas, tom qab cov hlau raug hlawv, yog hais tias lub hwj chim mov raug txiav tawm, hluav taws yuav raug tswj nyob rau hauv ib tug tej yam ntau yam, yuav tsis kis, nrog cov nplaim retardant thiab inhibit cov pa luam yeeb ua tau zoo. nplaim retardant hlau yog ib qho tseem ceeb ntawm hluav taws xob kev nyab xeeb, kev xaiv ntawm nws cov khoom yog ib qho tseem ceeb heev, lub khw tam sim no feem ntau siv cov nplaim hluav taws xob cov ntaub ntawv xws liPVC, XLPE, silicone roj hmab thiab ntxhia rwb thaiv tsev cov ntaub ntawv.

Nplaim retardant hlau thiab cable khoom xaiv

Qhov siab dua cov pa ntsuas ntawm cov khoom siv hauv cov nplaim hluav taws xob hluav taws xob, qhov ua tau zoo ntawm cov nplaim hluav taws xob, tab sis nrog qhov nce ntawm cov pa ntsuas ntsuas, nws yog ib qho tsim nyog yuav tsum poob qee yam khoom. Yog tias cov khoom siv lub cev thiab cov txheej txheem ntawm cov khoom raug txo qis, kev ua haujlwm nyuaj, thiab tus nqi ntawm cov khoom yog nce, yog li nws yog ib qho tsim nyog yuav tsum xaiv cov pa ntsuas pa kom zoo, cov pa ntsuas pa ntawm cov khoom siv rwb thaiv tsev mus txog 30, cov khoom tuaj yeem dhau qhov kev xeem ntawm chav kawm C hauv tus qauv, yog tias sheathing thiab filling cov ntaub ntawv yog cov khoom siv hluav taws xob hluav taws xob, cov khoom lag luam tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm Chav Kawm A. rau hauv halogenated nplaim retardant cov ntaub ntawv thiab halogen-dawb nplaim retardant cov ntaub ntawv;

1. Halogenated nplaim retardant cov ntaub ntawv

Vim lub decomposition thiab tso tawm ntawm hydrogen halide thaum lub combustion yog rhuab, hydrogen halide tuaj yeem ntes cov dawb radical HO hauv paus, kom cov combustion ntawm cov khoom yog ncua los yog tua kom tiav lub hom phiaj ntawm nplaim hluav taws. Feem ntau siv yog polyvinyl chloride, neoprene roj hmab, chlorosulfonated polyethylene, ethylene-propylene roj hmab thiab lwm yam ntaub ntawv.

(1) nplaim retardant polyvinyl chloride (PVC): Vim yog tus nqi pheej yig ntawm PVC, zoo rwb thaiv tsev thiab nplaim retardant, nws yog dav siv nyob rau hauv zoo tib yam nplaim taws retardant hlau thiab cable. Txhawm rau txhim kho cov nplaim hluav taws kub nyhiab ntawm PVC, halogen nplaim taws retardants (decabromodiphenyl ethers), chlorinated paraffins thiab synergic nplaim retardants feem ntau tau ntxiv rau cov mis los txhim kho cov nplaim hluav taws xob ntawm PVC.

Ethylene propylene roj hmab (EPDM): non-polar hydrocarbons, nrog cov khoom siv hluav taws xob zoo, muaj kev tiv thaiv hluav taws xob, tsis tshua muaj hluav taws xob, tab sis ethylene propylene roj hmab yog cov khoom siv hluav taws xob, peb yuav tsum txo cov qib ntawm crosslinking ethylene propylene roj hmab, txo cov saw hlau molecular disconnection los ntawm cov khoom tsis tshua muaj molecular hnyav cov khoom ntawm flammable;

(2) Cov pa luam yeeb tsawg thiab cov khoom siv hluav taws xob tsawg halogen
Feem ntau yog rau polyvinyl chloride thiab chlorosulfonated polyethylene ob cov ntaub ntawv. Ntxiv CaCO3 thiab A (IOH) 3 rau cov qauv ntawm PVC. Zinc borate thiab MoO3 tuaj yeem txo cov HCL tso tawm thiab cov pa luam yeeb ntawm cov nplaim hluav taws xob polyvinyl chloride, yog li txhim kho cov nplaim hluav taws xob ntawm cov khoom, txo cov halogen, acid pos huab, pa taws, tab sis tuaj yeem ua rau cov pa ntsuas qis me ntsis.

2. Halogen-dawb nplaim retardant cov ntaub ntawv

Polyolefins yog cov ntaub ntawv tsis muaj halogen, muaj cov hydrocarbons uas ua rau cov pa roj carbon dioxide thiab dej thaum kub hnyiab yam tsis tsim cov pa taws tseem ceeb thiab cov pa phem. Polyolefin feem ntau suav nrog polyethylene (PE) thiab ethylene - vinyl acetate polymers (E-VA). Cov ntaub ntawv no lawv tus kheej tsis muaj nplaim taws retardant, yuav tsum tau ntxiv inorganic nplaim retardants thiab phosphorus series nplaim taws retardants, thiaj li yuav ua rau cov tswv yim halogen-dawb nplaim retardant cov ntaub ntawv; Txawm li cas los xij, vim tias tsis muaj pawg polar nyob rau ntawm cov saw hlau molecular ntawm cov khoom tsis yog polar nrog hydrophobicity, qhov kev sib raug zoo nrog cov nplaim hluav taws tsis zoo yog qhov tsis zoo, nyuaj rau kev ruaj khov. Txhawm rau txhim kho qhov ua haujlwm saum npoo ntawm polyolefin, surfactants tuaj yeem ntxiv rau cov mis. Los yog nyob rau hauv polyolefin tov nrog polymers uas muaj polar pawg, thiaj li yuav ua rau kom tus nqi ntawm cov nplaim retardant muab tub lim, txhim kho cov neeg kho tshuab zog thiab ua cov khoom ntawm cov khoom, thaum tau txais cov nplaim retardant zoo dua. Nws tuaj yeem pom tias cov nplaim hluav taws xob thiab cov kab hluav taws xob tseem muaj txiaj ntsig zoo, thiab kev siv yog ib puag ncig zoo heev.