nūhou

ʻO ka Ultraviolet absorber (UV absorber) he mea hoʻopaʻa māmā e hiki ke komo i ka ʻāpana ultraviolet o ka lā a me nā kumu kukui fluorescent me ka hoʻololi ʻole iā ia iho. ʻO ka Ultraviolet absorber ka hapa nui o ka pauka crystalline keʻokeʻo, ke kūpaʻa wela maikaʻi, ke kūpaʻa kemika maikaʻi, ʻaʻohe kala, ʻaʻohe mea ʻawaʻawa, ʻala ʻole, hoʻohana maʻamau i nā polymers (plastics, etc.), coatings a pēlā aku.

ʻO ka hapa nui o nā kala, ʻoi aku ka nui o nā kala puaʻa inorganic, hiki ke pāʻani i kahi pae o ka hoʻopaʻa māmā ke hoʻohana wale ʻia i nā huahana plastik. No nā huahana plastik kala no ka hoʻohana ʻana i waho no ka wā lōʻihi, ʻaʻole hiki ke hoʻomaikaʻi ʻia ke kūpaʻa māmā o ka huahana e ka mea kala wale. ʻO ka hoʻohana wale ʻana i ka stabilizer māmā hiki ke pale a hoʻolohi i ka helu o ka ʻelemakule māmā o nā huahana plastik kala no ka manawa lōʻihi. Hoʻomaikaʻi nui i ka paʻa māmā o nā huahana plastik kala. ʻO ka amine light stabilizer (HALS) kahi papa o nā pūhui amine organik me ka hopena steric hindrance. Ma muli o kāna mau hana o ka decomposing hydroperoxide, quenching radical oxygen, trapping free radicals, and recycling of effective groups, HALS is the plastic light stabilizer with high anti-photoaging efficiency a me ka nui loa ma ka home a ma waho. Hōʻike ka ʻikepili e hiki ke hoʻomaikaʻi i ka māmā a me ka paʻa oxygen o nā huahana plastic kala waho i nā manawa he nui. No nā huahana plastik i kala ʻia e nā kala kiʻi paʻi kiʻi a me nā kala kiʻi kiʻi (e like me ka cadmium yellow, uncored rutile, etc.), e noʻonoʻo ana i ka hopena catalytic photoaging o ka kala, pono e hoʻonui ʻia ka nui o ka stabilizer māmā.

Hiki ke hoʻokaʻawale ʻia nā UV absorbers e like me ke ʻano kemika, ka hapa hana a me ka hoʻohana ʻana, i wehewehe ʻia ma lalo nei:

1.Classification e like me ka hoʻolālā kemika: hiki ke hoʻokaʻawale ʻia nā mea hoʻoheheʻe ultraviolet i nā mea hoʻonaninani ultraviolet organik a me nā mea hoʻoheheʻe ultraviolet inorganic. ʻO nā mea hoʻoheheʻe ultraviolet organik ka nui o nā benzoates, benzotriazole, cyanoacrylate, a me nā mea ʻē aʻe, ʻoiai nā mea hoʻonaninani ultraviolet inorganic ka nui o ka zinc oxide, iron oxide, titanium dioxide a pēlā aku.

2.Classification e like me keʻano o ka hana: hiki ke hoʻokaʻawaleʻia ka ultraviolet absorber i keʻano pale a me keʻano absorption. Hiki i nā mea pale UV ke hōʻike i ke kukui UV a pēlā e pale aku ai i ke komo ʻana i ke kino, ʻoiai ʻo ka hoʻomoʻa ʻana i nā UV absorbers hiki ke komo i ka kukui UV a hoʻololi iā ia i ka wela a i ʻole ke kukui ʻike ʻia.

3.Classification e like me ka hoʻohana: ultraviolet absorbent hiki ke maheleia i cosmetic grade, food grade, pharmaceutical grade, etc. Cosmetic grade UV absorbers ua hoʻohana nuiʻia i ka sunscreen, nā huahana mālamaʻili a me nā mea hoʻonani'ē aʻe, hoʻohana nuiʻia nā meaʻai UV i ka meaʻai. mea hoʻopili, a me ka lāʻau lapaʻau UV absorbers ua hoʻohana nui ʻia i nā lāʻau lapaʻau.

He 'oihana 'o Unilong Industrymea hana UV, hiki iā mākou ke hāʻawi i kēia mau meamoʻo UVo nā huahana, inā makemake ʻoe, e ʻoluʻolu e hoʻokaʻaʻike mai iā mākou