I ka ʻoihana kaʻa, hoʻohana nui ʻia ka pahu alumini no ka pale ʻana i ka haʻalulu o ke kino o ke kaʻa a me ka hoʻohaʻahaʻa leo a me ka insulation wela o ke kino o ke kaʻa a me nā pā pā.
ʻO ka ʻūhā metala ma waena o nā pūnaewele he mea porous kiʻekiʻe-permeability i hana kūikawā ʻia me kahi ʻano porous like me ka sponge mai loko i waho. ʻO ke komo ʻana o ka leo mai ka ʻili i loko o loko ke kumu e haʻalulu ai nā ʻili liʻiliʻi o ka ea a me nā mea i loko o nā pores, a ma muli o ka friction a me ke kūpaʻa viscous, ua hoʻololi ʻia ka ikehu kani i ikehu wela a hoʻopaʻa ʻia.

Ke hoʻohālikelike ʻia me nā mea kani kani ʻē aʻe, ʻo nā mea metala foamed he mau hiʻohiʻona kani kani kiʻekiʻe i ka pae haʻahaʻa haʻahaʻa. E like me ke koho ʻana o ka mānoanoa o ka papa lewa, hōʻike ia i ka hopena kani maikaʻi loa i ka wā e hoʻopili ai i kahi ākea ākea haʻahaʻa haʻahaʻa.
Hoʻohana ʻia ia no ke kani kani ʻana o nā kaʻa a me nā keʻena kaʻaahi, ʻaʻole wale ka maikaʻi o ka hoʻokō ʻana i ke kani, akā ʻoi aku ka maikaʻi o ka anti-deformation hana ma mua o nā mea polyester maʻamau, he maikaʻi ka hana absorption ikehu, ikaika kiʻekiʻe, non-combustion, a hoʻonui i ka palekana. o na lako halihali; I ka manawa like, ʻaʻohe mea ʻawaʻawa a maikaʻi ʻole ka mea metala, ʻoi aku ka nui o ka laina me nā kūlana palekana kaiapuni.
I kēia manawa, ua hoʻohana nui ʻia nā mea metala foamed i nā mea hoʻokalakupua leo no nā kaʻa a me nā kaʻa kaʻaahi ma nā ʻāina ʻē.