Lub cev thiab cov cuab yeej cuab tam ntawm cov hnab ntim khoom noj

Xws li lub zog tensile, elongation ntawm kev tawg, nws qhia txog lub peev xwm ntawm cov khoom kom tiv taus tensile 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, kub tsis kam, txias tsis kam, nruab nrab kuj; Cov cim qhia xws li lub sealing tev quab yuam ntawm lub hnab, lub siab tsis kam thiab poob tsis kam ntawm lub hnab, cov ntsuas no qhia txog kev ntseeg siab ntawm kev tiv thaiv ntawm lub puab ntim ntawm lub hnab ntim khoom noj.

Kev ua cov hnab yas zaj duab xis yuav tsum dhau los ntawm cov cua kub dhau, 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 hnab nrog resin, antioxidants, tshav kub stabilizers thiab lwm yam additives yuav tsum tau. ntxiv rau cov resin. Qee lub hnab ntim zaj duab xis kuj tseem xav tau cov khoom siv tiv thaiv zoo li qub, tiv thaiv kev ua kom tsis zoo, thiab siab plam vim qhov kev xav tau ntawm cov tshuab ntim khoom thiab cov khoom siv los yog cov khoom, yog li cov tshuaj tiv thaiv kab mob, cov tshuaj tiv thaiv fogging, lubricants, anti-opening agents thiab lwm yam ntxiv ntxiv. Tag nrho cov tshuaj ntxiv no yuav tsum tau sim ua ntej GB15139 "Food Safety Toxicology Evaluation Procedure" los ua pov thawj tias lawv tsis muaj tshuaj lom ua ntej lawv tuaj yeem siv tau, tab sis kuj tseem muaj qhov txwv ntawm cov khoom ntxiv. Yog li ntawd, nyob rau hauv cov khoom, cov khoom uas tsis muaj molecular hnyav uas yuav muab rho tawm, uas yog, evaporation residues, los yog tej yam uas yuav oxidized thiab deteriorated, uas yog, poov tshuaj permanganate noj, tsis tau tshaj li qhov teev tseg, thiab yuav siv tsis tau yog tias nws. yog tshaj. Yog li ntawd, yuav tsum muaj cov qauv kev tu cev zoo sib xws rau cov khoom pwm, lub hom phiaj yog los tiv thaiv kev tsis sib haum xeeb thiab kev tsim txom ntawm cov khoom siv ntxiv, thiab kom zoo dua kom ntseeg tau tias cov khoom siv rau kev ntim khoom ncaj qha thiab kev sib cuag cov khoom noj muaj kev nyiam huv thiab kev nyab xeeb.