Ke manaʻoʻiʻo nei au he nui ka poʻe e hopohopo nei i ka pilikia o ka palakaʻeke mea hana EVA, no laila he aha ka mea e mae ai nā ʻeke mea hana? ʻO ka mae ʻana o nā huahana ʻulaʻula e pili ana i ke kūpaʻa māmā, ka pale ʻana i ka oxygen, ke kūpaʻa wela, ka waikawa a me ka pale alkali o nā puaʻa a me nā mea pena, a me nā waiwai o ka resin i hoʻohana ʻia. E noʻonoʻo pōkole kākou ma lalo nei.
1. Acid and alkali resistance ʻO ka mae ʻana o nā huahana plastik kala e pili ana i ke kūʻē kemika o ka mea kala (ka waikawa a me ka alkali pale, redox resistance).
No ka laʻana, ʻaʻole kūpaʻa ka molybdenum chromium ʻulaʻula i nā ʻakika dilute, akā paʻakikī i ka alkali, a ʻaʻole kūpaʻa ka cadmium melemele. ʻO kēia mau puaʻa ʻelua a me ka resin phenolic he hopena hoʻohaʻahaʻa ikaika i kekahi mau kala, e hoʻopilikia nui i ka pale wela a me ke kū ʻana o ka wā o nā kala a me ka mae.
2. Antioxidation: E mae mālie ana kekahi mau puaʻa organik ma muli o ka hoʻohaʻahaʻa ʻana o nā macromolecules a i ʻole nā hoʻololi ʻē aʻe ma hope o ka hoʻohemo ʻana.
ʻO kēia kaʻina hana e pili ana i ka oxidation wela kiʻekiʻe i ka wā o ka hana ʻana a me ka oxidation i ka wā e hālāwai ai me nā oxidants ikaika (e like me ka chromate i ka chromium melemele). Ke hui pū ʻia nā loko, nā puaʻa azo a me nā melemele chrome, e mae mālie ke kala ʻulaʻula.
3. ʻO ke kūpaʻa wela o nā puaʻa pale wela e pili ana i ke kiʻekiʻe o ka poho kaumaha o ka wela, ka wehe ʻana, a me ka mae ʻana o ka puaʻa ma lalo o ka wela o ka hoʻoponopono ʻana.
Hoʻokumu ʻia nā puaʻa inorganic me nā ʻokikene metala a me nā paʻakai, he kūpaʻa maikaʻi ka wela a me ke kūpaʻa wela kiʻekiʻe. E hoʻololi ʻia ka hoʻololi ʻana o ka molecular structure a me ka decomposition liʻiliʻi o nā pua i hana ʻia i kekahi mahana. No nā huahana PP, PA, a me PET, ʻoi aku ka mahana o ka hana ma luna o 280 ° C. Ke koho ʻana i nā kala, ma kekahi ʻaoʻao, pono mākou e hoʻolohe i ka pale wela o ka puaʻa, a ma kekahi ʻaoʻao, pono mākou e noʻonoʻo i ka manawa pale wela o ka puaʻa. ʻO ka manawa pale wela he 4-10 ua. .
4. Māmā ʻO ka māmā o nā kala e pili pono i ka maeʻana o nā huahana.
No nā huahana o waho i ʻike ʻia i ka mālamalama ikaika, ʻo ka pae māmā (sunfastness) o ka kala i hoʻohana ʻia he hōʻailona koʻikoʻi. Inā ʻino ka pae māmā, e mae koke ka huahana i ka wā e hoʻohana ai. ʻAʻole i emi iho ka papa kūʻē māmā i koho ʻia no nā huahana kū i ka wā ma mua o ka pae ʻeono, a ʻoi aku ka maikaʻi o ke koho ʻana i nā pae ʻehiku a ʻewalu paha. No nā huahana i loko, hiki ke koho ʻia ka pae ʻehā a ʻelima paha.
ʻO ke kūpaʻa māmā o ka resin carrier he mea nui hoʻi i ka loli kala. Ma hope o ka hoʻomālamalama ʻia ʻana o ka resin e nā kukuna ultraviolet, hoʻololi kona ʻano molekala a mae ke kala. Hiki i ka hoʻohui ʻana i nā stabilizer māmā e like me nā ultraviolet absorbers i ka masterbatch hiki ke hoʻomaikaʻi i ke kūpaʻa māmā o nā kala a me nā huahana plastik kala.
Ka manawa hoʻouna: Jul-05-2024