Introduction: Ke kaʻina hana onā huahana palakiʻO ka hapa nui o nā kaʻina hana ʻehā: ka hana ʻana i ka mold, ka mālama ʻana i ka ʻili, ka paʻi ʻana, a me ka hui ʻana. ʻO ka hoʻomaʻamaʻa ʻili ʻana he ʻāpana koʻikoʻi nui. I mea e hoʻomaikaʻi ai i ka ikaika paʻa o ka uhi a hāʻawi i kahi kumu conductive maikaʻi no ka plating, pono ke kaʻina hana mua.
ʻO ka hoʻomaʻamaʻa mua ʻana o ka ʻili o nā huahana plastik
ʻO ka mea nui e pili ana i ka mālama ʻana i ka uhi ʻana a me ka mālama plating. ʻO ka maʻamau, loaʻa i nā plastics ka nui o ka crystallinity, polarity liʻiliʻi a i ʻole polarity, a me ka ikehu haʻahaʻa haʻahaʻa, e hoʻopilikia i ka pili ʻana o ka uhi. No ka mea ʻo ka plastic he insulator non-conductive, ʻaʻole hiki ke hoʻopaʻa pololei ʻia ma ka ʻili plastik e like me nā kikoʻī o ke kaʻina hana electroplating. No laila, ma mua o ka mālama ʻana i ka ʻili, pono e hana mua ʻia e hoʻomaikaʻi i ka ikaika paʻa o ka uhi a hāʻawi i kahi papa lalo conductive me ka ikaika paʻa maikaʻi no ka plating.
Hoʻomaʻamaʻa mua i ka uhi ʻana
ʻO ka hoʻomaʻamaʻa mua ʻana e pili ana i ka degreasing o ka ʻili plastik, ʻo ia hoʻi ka hoʻomaʻemaʻe ʻana i ka ʻaila a me ka mea hoʻokuʻu ma ka ʻili, a me ka hoʻoulu ʻana i ka ʻili plastik, i mea e hoʻomaikaʻi ai i ka pili ʻana o ka uhi.
1、Degreasing
Degreasing onā huahana palaki. E like me ka degreasing o nā huahana metala, hiki ke hana i ka degreasing o nā huahana plastik ma o ka hoʻomaʻemaʻe ʻana me nā solvents organik a i ʻole ka degreasing me nā wai wai alkaline i loaʻa nā surfactants. ʻO ka degreasing me nā mea hoʻoheheʻe organik he kūpono ia no ka hoʻomaʻemaʻe ʻana i ka paraffin, beeswax, ka momona a me nā lepo kūlohelohe ʻē aʻe mai ka ʻili plastik. ʻAʻole pono e hoʻoheheʻe ʻia ka mea hoʻoheheʻe organik i hoʻohana ʻia, pehu a pohā paha i ka plastic, a he haʻahaʻa kona kumu hoʻolapalapa, ʻaʻohe mea ʻawaʻawa a ʻaʻole hiki ke puhi ʻia. He kūpono nā ʻano wai wai alkaline no ka hoʻoheheʻe ʻana i nā plastic alkali-resistant. Aia i loko o ka hoʻonā ka soda caustic, nā paʻakai alkaline a me nā ʻano surfactants like ʻole. ʻO ka surfactant maʻamau i hoʻohana ʻia ʻo ia ka moʻo OP, ʻo ia hoʻi ka alkylphenol polyoxyethylene ether, ʻaʻole i hana i ka huʻa a ʻaʻole e noho ma ka ʻili plastik.
2、Ka ho'ā ʻana o ka ʻili
ʻO kēia hoʻoikaika ʻana no ka hoʻomaikaʻi ʻana i nā waiwai ili o nā plastics, ʻo ia hoʻi, e hoʻohua i kekahi mau pūʻulu polar ma luna o ka ʻili plastik a i ʻole e hoʻomaʻamaʻa iā ia i hiki ke maʻalahi ka pulu a hoʻopili ʻia ma ka ʻili o ka mea hana. Nui nā ʻano no ka mālama ʻana i ka ʻili, e like me ka oxidation chemical, flame oxidation, solvent vapor etching a me ka corona discharge oxidation. ʻO ka mea i hoʻohana nui ʻia ʻo ia ka chemical crystal oxidation treatment, ka mea e hoʻohana pinepine ai i ka wai lapaʻau chromic acid, a ʻo kāna ʻano maʻamau ʻo 4.5% potassium dichromate, 8.0% wai, a me 87.5% concentrated sulfuric acid (ʻoi aku ma mua o 96%).
Hiki ke uhi pololei ʻia kekahi mau huahana plastik, e like me ka polystyrene a me ABS plastics, me ka ʻole o ka hoʻomaʻamaʻa ʻana i ka oxidation. No ka loaʻa ʻana o ka uhi kiʻekiʻe, hoʻohana pū ʻia ka lāʻau oxidation kemika. No ka laʻana, ma hope o ka degreasing, hiki ke kālai ʻia ka plastik ABS me kahi wai lapaʻau chromic acid dilute. ʻO kāna kumu lapaʻau maʻamau he 420g/L chromic acid a me 200ml/L sulfuric acid (kaumaha kikoʻī 1.83). ʻO ke kaʻina hana maʻamau he 65 ℃ 70 ℃ / 5min10min, holoi wai, a maloʻo. ʻO ka maikaʻi o ke kālai ʻana me ka wai lapaʻau chromic acid ʻoiai ʻo ka paʻakikī o ke ʻano o ka huahana plastik, hiki ke mālama like ʻia. ʻO ka hemahema, ʻo ia ka pōʻino o ka hana a aia nā pilikia haumia.
Pretreatment of coating coating
ʻO ke kumu o ka hoʻomaʻamaʻa mua ʻana o ka uhi uhi ʻana e hoʻomaikaʻi i ka hoʻopili ʻana o ka uhi i ka ʻili plastik a e hana i kahi papa lalo metala conductive ma ka ʻili plastik. ʻO ke kaʻina hana pretreatment ka nui o: mechanical roughening, chemical degreasing, roughening chemical, sensitization treatment, activation treatment, reduction treatment and chemical plating. ʻO nā mea mua ʻekolu e hoʻomaikaʻi i ka hoʻopili ʻana o ka uhi, a ʻo nā mea hope ʻehā e hana i kahi papa lalo metala conductive.
1, ʻO ka hoʻopaʻa ʻana i ka mīkini a me ka hoʻomaʻamaʻa kemika
ʻO ka hoʻomaʻamaʻa ʻana i ka mīkini a me ka hoʻomaʻamaʻa kemika e hoʻomāhuahua i ka ʻili plastik e nā ʻano mīkini a me nā ʻano kemika e hoʻonui i ka wahi pili ma waena o ka uhi a me ka substrate. Manaʻo nui ʻia ʻo ka ikaika hoʻopaʻa i hiki ke hoʻokō ʻia e ka mechanical roughening ma kahi o 10% wale nō o ka roughening kemika.
2、Kemika degreasing
ʻO ke ʻano o ka degreasing no ka hoʻomaʻamaʻa mua ʻana i ka uhi ʻana o ka ʻili plastik e like me ke ʻano degreasing no ka hoʻomaʻamaʻa mua ʻana o ka uhi.
3、Ka hoʻomākeʻaka
ʻO ka Sensitization ka hoʻopili ʻana i kekahi mau mea maʻalahi i hoʻoheheʻe ʻia, e like me ka tin dichloride, titanium trichloride, a me nā mea ʻē aʻe, ma luna o ka ʻili o nā plastics me kekahi mau mana adsorption. Hoʻopili ʻia kēia mau mea i hoʻopaʻa ʻia i ka wā o ka hoʻōla ʻana, a ua hoʻemi ʻia ka mea hana i ka catalytic crystal nuclei a noho mau ma ka ʻili o ka huahana. ʻO ke kuleana o ka sensitization ʻo ke kau ʻana i ke kumu no ka papa metala hoʻoheheʻe kemika ma hope.
4、Hoʻoikaika
ʻO ka hoʻoulu ʻana e mālama i ka ʻili sensitized me ke kōkua o kahi hopena o nā pūhui metala catalytically active. ʻO kona kumu, ʻo ia ka hoʻoinu ʻana i ka huahana i hoʻopili ʻia me ka mea hoʻohaʻahaʻa i loko o ka wai wai i loaʻa kahi mea hoʻoheheʻe o ka paʻakai metala makamae, i hoʻemi ʻia nā ion metala makamae e S2+n ma ke ʻano he oxidant, a waiho ʻia ka metala makamae i hoʻemi ʻia ma ka ʻili o ka huahana i ke ʻano o nā ʻāpana colloidal, nona ka hana catalytic ikaika. Ke hoʻokomo ʻia kēia ʻili i loko o kahi hopena hoʻoheheʻe kemika, lilo kēia mau ʻāpana i nā kikowaena catalytic, e hoʻolalelale i ka wikiwiki o ka hoʻololi ʻana o ka plating kemika.
5 、 Ho'ēmi lapaʻau
Ma mua o ka hoʻoheheʻe ʻana i nā kemika, ua hoʻokomo ʻia nā huahana i hoʻōla ʻia a holoi ʻia me ka wai maʻemaʻe i loko o kahi ʻano o ka hoʻohaʻahaʻa ʻana o ka mea hoʻonā i hoʻohana ʻia i ka plating kemika e hōʻemi a wehe i ka mea hoʻoulu ʻole. Kapa ʻia kēia ʻano lāʻau hōʻemi. Ke uhi ʻia ke keleawe kemika, hoʻohana ʻia ka formaldehyde solution no ka hoʻohaʻahaʻa ʻana i ka mālama ʻana, a ke uhi ʻia ka nickel kemika, hoʻohana ʻia ka sodium hypophosphite solution no ka mālama hōʻemi.
6、Ka hoʻopalapala kemika
ʻO ke kumu o ka plating chemical ka hana ʻana i kahi kiʻi metala conductive ma luna o ka ʻili o nā huahana plastik e hana i nā kūlana no ka electroplating i ka papa metala o nā huahana plastik. No laila, ʻo ka plating kemika kahi hana nui i ka electroplating plastic.
Ka manawa hoʻouna: Iune-13-2024