Lapaʻau alumini pepa pinhole a me kona ʻike: ʻO ka alumini metala he ʻano aniani metala nui loa, a hiki i ka pahu alumini kūpono ke hoʻopaʻa loa i kekahi kinoea, mahu wai a me ka malamalama. Akā ʻoiaʻiʻo, ma muli o ka mana o nā kumu he nui e like me ke kaʻina hana ʻōwili i hoʻohana ʻia i ka hana ʻana o ka alumini alumini, ka maikaʻi o ka ʻaila ʻōwili, ke kūlana o ka ʻili o ka ʻōwili, ka ʻenehana hana kaʻina hana a me ke kaiapuni o ke kahua hana, ʻike ʻia nā hemahema like ʻole i loko o ka pahu alumini, ʻoi aku ka nui o ka alumini alumini. ʻO nā pinholes kekahi o nā mea nui loa.

ʻO ka nui a me ka helu o nā pinholes kekahi o nā ana nui e ana i ka pae maikaʻi o nā huahana alumini. Ma muli o ka loaʻa ʻana o nā pinholes ʻaʻole ʻole ka permeation o ka oxygen a me ka mahu wai i ka alumini alumini..

ʻO ka nui a me ka helu o nā pinholes aluminika he hopena koʻikoʻi i ka pale ʻana i ka wai, nā waiwai pale kinoea a me nā waiwai pale māmā o ka alumini alumini a me kāna mau mea hoʻohui. ʻO ke kūlana aupuni GB3198-1996 o koʻu ʻāina e hana i kēia mau ʻōlelo ma luna o nā pinholes: “ʻAe ʻia ka ʻili o ka pahu alumini e loaʻa nā pinhole i ʻike ʻia e ka maka ʻōlohelohe, akā, ʻaʻole e hoʻonohonoho paʻa ʻia nā ʻili, a ʻaʻole e ʻoi aku ka nui o ke anawaena o nā ʻiʻo o ka alumini lāʻau lapaʻau 0.3 mm, aole e oi aku 0.3 mm. 5 pcs/m². ʻAʻole ʻoi aku ka nui o ka pinhole o nā pahu alumini maʻemaʻe ʻē aʻe 0.5 mm.

No ka mea, he hōʻailona koʻikoʻi nā pinholes no ka ʻike ʻana i nā pahu alumini, He nui nā mea ʻenehana ʻē aʻe e kuhikuhi ana i nā pinholes o nā alumini alumini a i ʻole ka hoʻoili ʻana i ka mahu wai o nā pahu alumini. American Society for Testing and Materials standard ASTMB-479-85 “Kūlana ʻenehana no ka Aluminum Foil Annealed a me Alloy Aluminum Foil no ka Barrier Flexible Packaging” ke kau nei: “ʻAʻole pono ka nui o nā pinhole, a me ka pepa alumini me ka mānoanoa oi aku 0.5 pono ʻole ka mm o nā pinhole.” Kepanī Hana Kūlana JISZ1520 -1975 “Kūlana no ka Hui Aluminum Foil” hāʻawi i ka ʻikepili o ka hoʻouna ʻana i ka mahu wai o ka pahu alumini hui.

I kēia manawa, aia kahi ākea nui ma waena o ka pae maikaʻi o ka pahu alumini home a me nā ʻāina ʻē, ʻike nui ʻia i ka helu a me ka nui o nā pinholes. ʻO kekahi mau kūlana haole ke ʻōlelo nei ʻaʻohe pinholes ke ʻoi aku ka mānoanoa o ka alumini foil 0.025 mm, ʻoiai ʻo nā kūlana kūloko e ʻōlelo nei ʻaʻohe pinhole ke ʻoi aku ka mānoanoa o ka pahu alumini 0.05 mm. No nā pinhole, Ua ʻōlelo nā kūlana haole i ʻoi aku ka nui o nā pinhole ma mua o 0.1 ʻAʻole ʻae ʻia ka mm, ʻoiai ke ʻōlelo nei nā kūlana kūloko e hiki ke hiki i ka nui o nā pinholes 0.5 mm.

ʻO ka hoʻomaikaʻi ʻana i ka maikaʻi o ka alumini foil a me ka hōʻemi ʻana i ka helu a me ka nui o nā pinholes i ka alumini alumini nā pilikia e pono ai nā mea hana alumini alumini e hoʻoponopono koke.. Ua hoʻoikaika mau ʻo HWPFP i kēia ʻano e hōʻoia i ka maikaʻi o ka alumini alumini lāʻau lapaʻau.

Ka nānā ʻana i ka degere pinhole o ka pahu alumini lāʻau lapaʻau paʻa: Paʻa ʻike maka: hoohana i ka pahu laau o 800 mm x 600 mm x 300 mm a i ʻole ka leo kūpono, e hoʻokomo i ke kukui fluorescent 30W i loko o ka pahu lāʻau, e kau i ka ipu aniani ma ka pahu laau, a ua uhi ʻia ka pā aniani me ka pepa ʻeleʻele a waiho i kahi ākea 400mm x 250mm no ka nānā ʻana i nā ʻano pinholes.. Lawe 20 nā laʻana me ka lōʻihi o 400 mm a me ka laula o 250 mm mai ka pahu alumini i hoʻopau ʻia, e kau ia mau mea ma ka papa kuhikuhi pakahi, a nānā i ko lākou mau pinhole i ka pōʻeleʻele.

ʻO nā koi no nā pinhole, ʻaʻole pono ka paʻa, mau, ʻo nā pinhole manawa, ʻaʻohe puka pine me ke anawaena oi aku 0.3 mm, aole oi aku 1 pinhole no ka mika square me ke anawaena o 0.1-0.3 mm .