Nnyefe ngwa ngwa, ịdị mma dị mma, ọnụahịa dị mma.
Ngwaahịa ndị a dị mma, nwere nghọta dị elu, elu na-egbuke egbuke, enweghị isi kristal, yana ike iguzogide mmetụta siri ike. Ọnọdụ nkwakọ ngwaahịa dị mma!
Nkwakọ ngwaahịa ahụ bụ ngwa ahịa, o juru m anya na anyị nwere ike ịzụta ngwaahịa ndị dị otú ahụ n'ọnụ ahịa dị ala.
A na-akpọkwa ihe nkiri PVC a kpụchara akpụ nke PVDC aha ya bụ Polyvinylidene chloride (PVDC). Ihe nkiri PVC a kpụchara akpụ nke PVDC na-arụ ọrụ dị mkpa na nkwakọ ngwaahịa blister dị ka ihe mkpuchi ma ọ bụ mkpuchi na PVC. Ihe nkiri PVC a kpụchara akpụ nke PVDC nwere ike ibelata gas na mmiri nke ngwugwu blister PVC site na ihe dị ka 5-10. A na-etinye mkpuchi PVDC n'otu akụkụ ma na-eche ihu na ngwaahịa na ihe mkpuchi ahụ.
A na-eji PVC (Polyvinyl chloride) na PVDC (polyvinylidene chloride) eme ihe n'ọgwụ dịka ihe ndị bụ isi e ji echekwa ngwaahịa ọgwụ, nke na-echebe ngwaahịa ọgwụ megide oxygen na isi ọjọọ, mmiri mmiri, nnyefe uzuoku mmiri, mmetọ, na nje bacteria. Ihe ndị a na-eme ka ihe nkiri PVC a kpụchara akpụ nke PVDC bụrụ ihe a họọrọ maka nkwakọ ngwaahịa blister. Ihe nkiri PVC a kpụchara akpụ nke PVDC dị na nha, dịka 40 g/m² PVDC, 60 g/m² PVDC, 90 g/m² PVDC, 120 g/m² PVDC.
A na-ejikarị ihe nkiri blister dị iche iche dabere na ihe nkiri PVC a kpụchara akpụcha nke PVDC eme ihe maka nkwakọ ngwaahịa blister ọgwụ, nkwakọ nri, ọgwụ, ihe ịchọ mma, na ngwaahịa ndị ọzọ na-emebi emebi ma ọ bụ dị nro iji mee ka ndụ dịgide. Enwere ike iji agba agba na/ma ọ bụ nzacha UV mee agba oyi akwa PVC. Ihe nkiri PVC a kpụchara akpụcha nke Polyvinylidene chloride (PVDC) – ihe nkiri PVC a kpụchara akpụcha nke PVDC. Ma e jiri ya tụnyere ọtụtụ ihe nkiri a na-ahụkarị, ihe nkiri PVC a kpụchara akpụcha nke PVDC nwere ihe mgbochi gas na mmiri dị elu, yana ezigbo ihe mkpuchi okpomọkụ. Ihe nkiri PVC a kpụchara akpụcha nke PVDC na-asọmpikarị na ihe nkiri a kpụchara akpụcha nke acrylic, PVOH na EVOH.
Nkọwapụta nke ihe nkiri PVC a kpụchara akpụ nke PVDC dịka ndị a si dị:
PVC/PVDC: 250 micron PVC /40 gsm PVDC
PVC/PVDC: 250 micron PVC /60 gsm PVDC
PVC/PVDC: 250 micron PVC /90 gsm PVDC
PVC/PVDC: 300 micron PVC /40 gsm PVDC
PVC/PVDC: 300 micron PVC /60 gsm PVDC
PVC/PVDC: 300 micron PVC /90 gsm PVDC
Enwere ike ịhazi ọkpụrụkpụ na gsm nke ihe nkiri PVC a kpụchara akpụ nke PVDC.