①Mea hui pepa-plastic. He maikaʻi ka hana paʻi ʻana o ka pepa, maikaʻi ka permeability ea, maikaʻi ʻole ke kūpaʻa wai, a me ka deformation i ka wā e pili ana me ka wai; maikaʻi ke kūpaʻa wai o ka ʻili plastik a me ka paʻa ʻana o ka ea, akā maikaʻi ʻole ka paʻi ʻana. Ma hope o ka hui ʻana o nā mea ʻelua, ua hoʻokumu ʻia nā mea hui e like me ka pepa plastik (ʻili plastik ma ke ʻano he mea ʻili), pepa-plastic (pepa ma ke ʻano he mea ʻili), a me ka pepa-plastic-plastic. Hiki i ka mea hui pepa-plastic ke hoʻomaikaʻi i ke kūpaʻa makū o ka pepa, a i ka manawa like he sila wela. Hiki ke hui ʻia e ke kaʻina hana hui maloʻo, ke kaʻina hana hui pulu a me ke kaʻina hana hui extrusion.

②Mea hui plastik. ʻO nā mea hui plastik-plastik ka ʻano mea hui maʻamau. Loaʻa i nā ʻili plastik like ʻole ko lākou mau pono a me nā hemahema. Ma hope o ka hui ʻana iā lākou, loaʻa i ka mea hou nā waiwai maikaʻi loa e like me ke kūpaʻa ʻana i ka ʻaila, ke kūpaʻa ʻana i ka makū, a me ka hiki ke sila i ka wela. Ma hope o ka hui ʻana o ka plastik-plastik, hiki ke hana ʻia nā mea hui ʻelua-papa, ʻekolu-papa, ʻehā-papa a me nā mea ʻē aʻe, e like me: OPP-PE BOPET - PP, PE, PT PE-evoh-PE.

③Mea hui alumini-plastic. ʻOi aku ka maikaʻi o nā waiwai paʻa ea a me nā waiwai pale o ka foil alumini ma mua o ka ʻili plastik, no laila i kekahi manawa hoʻohana ʻia kahi hui plastik-aluminum-plastic, e like me PET-Al-PE.

④Mea hui pepa-alumini-plastic. Hoʻohana ka mea hui pepa-alumini-plastic i ka hiki ke paʻi maikaʻi ʻia o ka pepa, ka pale wai maikaʻi a me ka conductivity wela o ka alumini, a me ka sila wela maikaʻi o kekahi mau kiʻiʻoniʻoni. ʻO ka hui pū ʻana iā lākou e hiki ai ke loaʻa kahi mea hui hou. E like me ka pepa-alumini-polyethylene.

Mīkini Fexoʻaʻohe mea he ʻano mea i hui pū ʻia, pono e loaʻa i ka papa waho ka paʻi maikaʻi a me nā waiwai mechanical, he maikaʻi ka hoʻopili ʻana o ka papa o loko i ka wela, a ʻo ka papa waena nā waiwai e pono ai nā ʻike, e like me ka pale ʻana i ka mālamalama, ka pale ʻana i ka makū a pēlā aku.