Cov Khoom Siv Dab Tsi Siv Rau Hauv Cov Hlau Hluav Taws Kub Thiab Cov Cables？

Cov xov hluav taws kub hnyiab, hais txog cov xov hlau uas muaj cov xwm txheej hluav taws kub hnyiab, feem ntau hauv qhov kev sim, tom qab cov xov hlau raug hlawv, yog tias lub hwj chim raug txiav tawm, hluav taws yuav raug tswj hwm hauv qee qhov ntau, yuav tsis kis mus, nrog rau cov nplaim taws kub hnyiab thiab tiv thaiv kev ua pa luam yeeb lom. Cov xov hluav taws kub hnyiab ua ib feem tseem ceeb ntawm kev nyab xeeb hluav taws xob, kev xaiv ntawm nws cov khoom siv yog qhov tseem ceeb, kev ua lag luam tam sim no feem ntau siv cov ntaub ntawv hluav taws kub hnyiab suav nrogPVC, XLPE, roj hmab silicone thiab cov ntaub ntawv rwb thaiv tsev.

Kev xaiv cov hlau thiab cov khoom siv cable uas tiv taus hluav taws

Qhov siab dua ntawm cov pa oxygen index ntawm cov khoom siv hauv cov hluav taws xob retardant cable, qhov zoo dua qhov kev ua tau zoo ntawm cov hluav taws xob retardant, tab sis nrog kev nce ntawm cov pa oxygen index, nws yog qhov tsim nyog kom poob qee yam khoom. Yog tias cov khoom siv lub cev thiab cov txheej txheem ntawm cov khoom siv raug txo qis, kev ua haujlwm nyuaj, thiab tus nqi ntawm cov khoom siv raug nce, yog li nws yog qhov tsim nyog los xaiv cov pa oxygen index tsim nyog thiab tsim nyog, cov pa oxygen index ntawm cov khoom siv rwb thaiv tsev dav dav ncav cuag 30, cov khoom tuaj yeem dhau qhov kev xeem ntawm chav kawm C hauv tus qauv, yog tias cov ntaub ntawv sheathing thiab sau yog cov ntaub ntawv hluav taws xob retardant, cov khoom tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm Chav Kawm B thiab Chav Kawm A. Cov hlau hluav taws xob retardant thiab cov ntaub ntawv cable feem ntau yog muab faib ua cov ntaub ntawv halogenated hluav taws xob retardant thiab cov ntaub ntawv halogen-dawb hluav taws xob retardant;

1. Cov ntaub ntawv tiv thaiv hluav taws halogenated

Vim yog qhov kev lwj thiab tso tawm ntawm hydrogen halide thaum lub combustion raug cua sov, hydrogen halide tuaj yeem ntes cov free radical H2O hauv paus, yog li ntawd qhov combustion ntawm cov khoom raug ncua lossis tua kom ua tiav lub hom phiaj ntawm nplaim taws retardant. Feem ntau siv yog polyvinyl chloride, neoprene roj hmab, chlorosulfonated polyethylene, ethylene-propylene roj hmab thiab lwm yam ntaub ntawv.

(1) Polyvinyl chloride (PVC) uas tiv taus hluav taws: Vim tias PVC pheej yig, rwb thaiv tsev zoo thiab tiv taus hluav taws, nws yog siv dav hauv cov xov hlau thiab cable uas tiv taus hluav taws. Yuav kom txhim kho qhov tiv taus hluav taws ntawm PVC, cov tshuaj halogen tiv taus hluav taws (decabromodiphenyl ethers), chlorinated paraffins thiab synergic flame retardants feem ntau ntxiv rau hauv cov mis kom txhim kho qhov tiv taus hluav taws ntawm PVC.

Roj Hmab Ethylene propylene (EPDM): cov roj hmab uas tsis yog polar, muaj cov khoom siv hluav taws xob zoo heev, tiv taus kev rwb thaiv tsev siab, poob dielectric tsawg, tab sis roj hmab ethylene propylene yog cov khoom siv hluav taws xob, peb yuav tsum txo qhov degree ntawm crosslinking ethylene propylene roj hmab, txo qhov kev sib txuas ntawm cov saw hlau molecular los ntawm cov tshuaj molecular qis, txhawm rau txhim kho cov khoom siv hluav taws xob ntawm cov khoom;

(2) Cov pa luam yeeb tsawg thiab cov nplaim taws halogen tsawg
Feem ntau yog siv rau polyvinyl chloride thiab chlorosulfonated polyethylene ob yam khoom. Ntxiv CaCO3 thiab A(IOH)3 rau hauv cov mis ntawm PVC. Zinc borate thiab MoO3 tuaj yeem txo qhov HCL tso tawm thiab cov pa luam yeeb ntawm cov nplaim taws retardant polyvinyl chloride, yog li txhim kho qhov nplaim taws retardancy ntawm cov khoom, txo cov halogen, acid pos huab, pa luam yeeb emissions, tab sis yuav ua rau cov pa oxygen index me ntsis txo qis.

2. Cov ntaub ntawv tiv thaiv hluav taws uas tsis muaj halogen

Polyolefins yog cov khoom siv uas tsis muaj halogen, uas muaj cov hydrocarbons uas zom cov pa roj carbon dioxide thiab dej thaum hlawv yam tsis muaj pa luam yeeb loj thiab cov pa phem. Polyolefin feem ntau muaj polyethylene (PE) thiab ethylene - vinyl acetate polymers (E-VA). Cov khoom no lawv tus kheej tsis muaj cov tshuaj tua hluav taws, yuav tsum tau ntxiv cov tshuaj tua hluav taws inorganic thiab cov tshuaj tua hluav taws phosphorus series, txhawm rau ua cov khoom siv tua hluav taws halogen uas siv tau; Txawm li cas los xij, vim tsis muaj cov pab pawg polar ntawm cov saw molecular ntawm cov khoom tsis-polar nrog hydrophobicity, qhov sib raug zoo nrog cov tshuaj tua hluav taws inorganic tsis zoo, nyuaj rau kev sib txuas ruaj khov. Txhawm rau txhim kho qhov ua haujlwm ntawm polyolefin, surfactants tuaj yeem ntxiv rau hauv cov mis. Los yog hauv polyolefin sib xyaw nrog cov polymers uas muaj cov pab pawg polar, kom nce qhov ntau ntawm cov tshuaj tua hluav taws, txhim kho cov khoom siv kho tshuab thiab cov khoom ua haujlwm ntawm cov khoom, thaum tau txais cov tshuaj tua hluav taws zoo dua. Nws tuaj yeem pom tias cov hlau thiab cable tua hluav taws tseem muaj txiaj ntsig zoo heev, thiab kev siv yog tus phooj ywg ib puag ncig heev.