He aha ke kumu e mae ai nā ʻeke pāʻani EVA

Ua hālāwai kekahi mau hoaaloha i kēlā ʻano kūlana. ʻAʻole maopopo iaʻu ke kumu. Ua mae ka waihoʻoluʻu o kēia ʻeke pāʻani ma hope o ka hoʻohana ʻana no ka manawa lōʻihi. Ua manaʻo mua au he mea mae ʻole, akā i kēia manawa ua mae. No laila, e nānā kākou i nā kumu. He aha ke kumu o ka mae ʻana o nā ʻeke pāʻani EVA?

Nā mea e pili ana i ka mae ʻana o ka plasticEVAhuahana. ʻO ka mae ʻana o nā huahana ʻulaʻula e pili ana i ke kūpaʻa māmā, ka pale ʻana o ka oxygen, ka pale ʻana i ka wela, ka waikawa a me ka pale alkali o nā puaʻa a me nā kala, a me nā ʻano o ka resin i hoʻohana ʻia. E like me nā kūlana hana a me nā koi o ka hoʻohana ʻana i nā huahana plastik, pono e loiloi piha ʻia nā waiwai i ʻōlelo ʻia ma luna o nā puaʻa e pono ai, nā dyes, surfactants, dispersants, carrier resins a me anti-aging additives i ka wā o ka hana ʻana o ka masterbatch ma mua o ke koho ʻana.

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 ka dilute acid, 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 ka 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.

ʻO nā mea hana o nā puaʻa inorganic he metala oxides a me nā paʻakai, i loaʻa ka paʻa wela maikaʻi 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. .