He aha ke kiʻiʻoniʻoni Shrink ka mea maikaʻi loa no kāu huahana a i ʻole noi?

● PVC (ʻike pū ʻia ʻo Polyvinyl Chloride)
Nā ikaika
ʻO kēia kiʻiʻoniʻoni he lahilahi, pliable, a māmā, ʻoi aku ka maʻalahi ma mua o ka nui o nā kiʻiʻoniʻoni emi.Hoʻoemi wale ia ma ka ʻaoʻao hoʻokahi a kūpaʻa loa i ka haehae ʻana a i ʻole ke kuʻi ʻana.He hōʻike akaka a ʻālohilohi ka PVC, e ʻoluʻolu i ka maka.

Nawaliwali
ʻO ka PVC e palupalu a me nā wrinkle inā piʻi ke kiʻekiʻe o ka mahana, a lilo ia i mea paʻakikī a paʻakikī inā lilo ia i mea maʻalili.No ka mea he chloride ka kiʻiʻoniʻoni i loko, ua ʻae wale ka FDA i ke kiʻi PVC no ka hoʻohana ʻana me nā huahana inedible.ʻO kēia ke kumu e hoʻokuʻu ai i ka uahi ʻawaʻawa i ka wā e hoʻomehana ai a hoʻopaʻa ʻia, pono e hoʻohana ʻia ma nā wahi me ka maikaʻi loa.No laila, loaʻa i kēia kiʻiʻoniʻoni nā kūlana hoʻolei koʻikoʻi.ʻAʻole kūpono ʻo PVC no ka hoʻopili ʻana i nā huahana he nui.

● Polyolefin
Nā ikaika
ʻO kēia ʻano kiʻiʻoniʻoni emi i ʻae ʻia e FDA no ka hoʻopili ʻana i ka meaʻai no ka mea ʻaʻohe chloride i loko, a ʻoi aku ka liʻiliʻi o ka ʻala i ka wā hoʻomehana a hoʻopaʻa ʻia.ʻOi aku ka maikaʻi no nā pūʻolo ʻano like ʻole me ka emi ʻana o ka piha.He nani a ʻālohilohi ka ʻili o ke kiʻiʻoniʻoni a maopopo loa.ʻAʻole like me PVC, hiki iā ia ke kū i kahi ākea ākea o ka fluctuations wela ke mālama ʻia, mālama i ka waihona.Inā pono ʻoe e hoʻopili i nā mea he nui, he koho maikaʻi loa ka polyolefin.ʻAʻole e like me PE, ʻaʻole hiki iā ia ke kāʻei i nā ʻeke lehulehu o nā mea kaumaha.Loaʻa ʻia ka polyolefin cross-linked e hoʻonui ai i kona ikaika me ka ʻole o ka hāʻawi ʻana i ka mālamalama.ʻO ka Polyolefin he 100% hiki ke hana hou ʻia, e lilo ia i koho "'ōmaʻomaʻo".

Nawaliwali
ʻOi aku ke kumukūʻai o ka Polyolefin ma mua o ke kiʻiʻoniʻoni PVC, a pono paha ia i nā perforations ma kekahi mau noi e pale aku i nā ʻeke ea a i ʻole nā ​​​​ʻaoʻao puʻupuʻu.

● Polyethylene
ʻO kekahi mau ʻike hou: Hiki ke hoʻohana ʻia ke kiʻiʻoniʻoni polyethylene no ke kiʻi ʻoniʻoni a i ʻole ke kiʻi ʻoniʻoni, ma muli o ke ʻano.Pono ʻoe e ʻike i ke ʻano āu e pono ai no kāu huahana.
Hana nā mea hana i ka polyethylene i ka wā e hoʻohui ai i ka ethylene i ka polyolefin i ka wā o ka polymerization.ʻEkolu ʻano like ʻole o Polyethylene: LDPE a i ʻole Polyethylene Low-density, LLDPE a i ʻole Linear Low-density Polyethylene, a me HDPE a i ʻole High-density polyethylene.Loaʻa iā lākou nā noi like ʻole, akā ma ka maʻamau, hoʻohana ʻia ka palapala LDPE no ka hōʻemi ʻana i ka pahu kiʻiʻoniʻoni.

Nā ikaika
Pōmaikaʻi no ka wahī ʻana i nā ʻeke he nui o nā mea kaumaha—no ka laʻana, ka helu nui o nā mea inu a i ʻole nā ​​hue wai.ʻOi aku ka lōʻihi a hiki ke hoʻolōʻihi i nā kiʻiʻoniʻoni ʻē aʻe.E like me ka polyolefin, ʻo ka polyethylene ka FDA i ʻae ʻia no ka hoʻopili ʻana i ka meaʻai.ʻOiai ua kaupalena ʻia nā kiʻiʻoniʻoni PVC a me polyolefin i ka mānoanoa, maʻamau a hiki i ka 0.03mm wale nō, hiki ke hoʻonui ʻia ka polyethylene a hiki i 0.8mm, i mea kūpono no ka ʻōwili ʻana i nā kaʻa e like me nā moku no ka mālama ʻana.Hoʻohana ʻia mai nā meaʻai nui a i ʻole nā ​​​​meaʻai maloʻo a hiki i nā ʻeke ʻōpala a me ka palletizing e like me ka uhi ʻana.

Nawaliwali
Ua emi ka nui o ka polyethylene ma kahi o 20%-80% a ʻaʻole maopopo e like me nā kiʻiʻoniʻoni ʻē aʻe.Hoʻemi ka polyethylene i ka wā e hoʻoluʻu ai ma hope o ka hoʻomehana ʻia ʻana, no laila pono e loaʻa kahi wahi hou no ka hoʻomaha ʻana ma ka hope o kāu tunnel emi.