Lub cev thiab cov cuab yeej cuab tam ntawm cov hnab ntim khoom noj
Nov 06, 2023
Nrog rau lub zog tensile thiab elongation ntawm kev tawg, nws qhia txog cov khoom muaj peev xwm tiv taus qhov nro thaum siv. Yog tias cov khoom no tsis tsim nyog, lub hnab ntim khoom noj yuav ua rau tawg thiab puas thaum siv.
Tsis tas li ntawd, nws kuj suav nrog cov ntsuas roj barrier xws li roj permeability; Roj kuj Performance index, kub tsis kam, txias tsis kam, thiab nruab nrab kuj; Lub sealing thiab tev quab yuam ntawm lub hnab, lub siab tsis kam thiab poob tsis kam ntawm lub hnab, thiab lwm yam kev taw qhia qhia txog kev ntseeg siab ntawm lub hnab ntim khoom noj hauv kev tiv thaiv lub ntim sab hauv.
Kev ua cov hnab yas zaj duab xis yuav tsum dhau los ntawm cov txheej txheem cua sov, thiab cov yas muaj teeb meem ntawm kev tawg, oxidation, degradation, thiab deterioration thaum rhuab. Yog li ntawd, thaum ua cov yas zaj duab xis los yog lub hnab nrog resin, additives xws li antioxidants thiab kub stabilizers yuav tsum tau ntxiv rau cov resin. Qee lub hnab ntim zaj duab xis yuav tsum muaj kev tiv thaiv zoo li qub, tiv thaiv condensation, thiab siab smoothness vim cov txheej txheem ntim thiab cov khoom siv lossis cov ntsiab lus. Yog li, cov khoom siv ntxiv xws li cov tshuaj tiv thaiv zoo li qub, cov tshuaj tiv thaiv fogging, cov roj nplua nyeem, thiab cov tshuaj qhib yuav tsum tau ntxiv. Tag nrho cov tshuaj ntxiv no yuav tsum tau ua ntej kev sim sim hauv GB15139 "Food Safety Toxicology Evaluation Procedure" thiab raug pov thawj tias tsis muaj tshuaj lom ua ntej siv, tab sis kuj tseem muaj qhov txwv ntawm cov khoom ntxiv ntxiv. Yog li, nyob rau hauv cov khoom, cov khoom uas tsis muaj molecular hnyav uas yuav muab rho tawm, uas yog evaporation residue los yog tej yam uas yuav oxidized thiab deteriorated, xws li poov tshuaj permanganate noj, tsis tuaj yeem tshaj li qhov tau teev tseg, thiab dhau ntawd, lawv siv tsis tau. Yog li ntawd, yuav tsum muaj cov qauv kev nyiam huv rau cov khoom pwm, nrog rau lub hom phiaj ntawm kev tiv thaiv kev tsis sib haum xeeb thiab kev tsim txom ntawm cov khoom siv ntxiv, thiab ua kom zoo dua tias cov khoom ntim ncaj qha thiab sib cuag nrog cov zaub mov muaj kev nyiam huv thiab kev nyab xeeb.
