Urea Formaldehyde Glue Powder， Mākaukau No ka Hoʻouna ~

Hōʻike huahana
ʻO Urea-formaldehyde resin (UF), i kapa ʻia ʻo urea-formaldehyde resin, ʻo ia ka polycondensation o ka urea a me ka formaldehyde ma lalo o ka hana a kahi catalyst (alkaline a acidic catalyst) e hana ai i ka resin urea-formaldehyde mua, a laila hana i kahi ʻano insoluble a infusible hope ma lalo o ka hana o kahi mea ho'ōla. Thermosetting resin. ʻOi aku ka māmā o ka resine urea-formaldehyde i hoʻōla ʻia ma mua o ka resin phenolic, translucent, kūpaʻa i nā ʻakika nāwaliwali a me nā alkali palupalu, loaʻa nā waiwai insulation maikaʻi, maikaʻi ke pale ʻana i ka ʻaʻahu, a kūʻai aku. ʻO ia ka mea maʻamau i hoʻohana ʻia ma waena o nā adhesives, ʻoi aku hoʻi i ka hana ʻana i nā papa hana like ʻole i ka ʻoihana hana lāʻau, urea-formaldehyde resin a me kāna mau huahana i hoʻololi ʻia e pili ana i ka 90% o ka nui o ka hoʻohana ʻana. Eia naʻe, maʻalahi ka hoʻoheheʻe ʻana o ka resin urea-formaldehyde i ka wā e ʻike ʻia ai i nā waikawa ikaika a me nā alkalis. He maikaʻi ʻole kona kūʻē ʻana i ka wā, maikaʻi ʻole ka viscosity mua, shrinkage nui, brittleness, wai kūpaʻa, a maʻalahi ke ʻelemakule. Hoʻokuʻu ka formaldehyde i nā papa hana me ka resin urea-formaldehyde i ka wā o ka hana ʻana a me ka hoʻohana ʻana. pilikia, no laila pono e hoʻololi.

Palapala noi
Hiki ke hoʻohana ʻia i nā huahana i koi ʻole i ka wai kiʻekiʻe a me nā waiwai dielectric, e like me nā ʻāpana mana, nā hoʻololi, nā lima mīkini, nā pahu mea kani, nā puʻupuʻu, nā mea e pono ai i kēlā me kēia lā, nā mea hoʻonaninani, nā tile mahjong, nā poʻi halepaku, a hiki ke hoʻohana ʻia i ka hana ʻana i kekahi papa.

ʻO ka resine Urea-formaldehyde ka mea i hoʻohana pinepine ʻia. ʻOi loa i ka hana ʻana i nā papa hana like ʻole i ka ʻoihana hana lāʻau, urea-formaldehyde resin a me kāna mau huahana i hoʻololi ʻia e pili ana i ka 90% o ka nui o ka hoʻohana ʻana.