Ngā Pūrongo

Kupu Whakataki: Te Tūranga o ngā Tāpiri Silicone i roto i te Tukatuka Polymer
E whakamahia whānuitia ana ngā tāpiringa silicone hei āwhina tukatuka me ngā whakarerekētanga mahi i roto i te hanga polymer hei whakahaere i te whanonga rewa, hei whakapai ake i ngā āhuatanga o te mata, me te whakarei ake i te pumau tukatuka i raro i ngā tikanga whakaputa tere-rahi.
I roto i ngā taiao tukatuka kirihou wera pērā i te extrusion, te werohanga pokepoke, te pupuhi kiriata, me te whakakotahitanga, he maha ngā wā ka pāngia ngā pūmua e te ahotea kutikuti teitei me ngā pāmahana teitei. Ka taea e ēnei āhuatanga te arahi ki ngā wero tukatuka noa, tae atu ki te rere rewa kore pumau, ngā hapa mata (pērā i te pakaru rewa me te kiri mango), te hanga mate, me te kounga hua koretake.
Kua hangaia ngā tāpiringa silicone hei whakatika i ēnei herenga ā-kanohi me te rheological mā te whakaiti i te waku polymer-konganuku, te whakapai ake i te hinu whakahinuhinu i te atanga rewa, me te whakaū i te whanonga rere i te wā tukatuka. Nō reira, ka whai wāhi atu rātou ki ngā mahi whakaputa pai ake me te mahi hua whakamutunga pumau ake.
E whakamahia whānuitia ana ēnei puta noa i ngā pūnaha pūmua nui, tae atu ki ngā polyolefin (PE, PP, LLDPE, HDPE, EVA), ngā matū PVC, ngā elastomer thermoplastic (TPE, TPU, TPO, TPV), me ngā kirihou hangarau (ABS, PC, PA/Nailona, ​​PBT, PET, PPS, POM, me PMMA).
Mai i te tirohanga tukatuka, ka whakamahia ngā tāpiringa silicone i roto i ngā tukanga extrusion, te werohanga pokepoke, te pupuhi kiriata, me te whakakotahitanga, ka āwhina i te whakau i te rheology rewa, te whakaiti i te waku atanga, me te whakaiti i ngā hapa e pā ana ki te mata me te mate i raro i ngā tikanga whakahaere tonu, tere-tiketike rānei.
Ko ngā whakamahinga whakamutunga ko ngā pūnaha waea me te taura, ngā wāhanga o roto o ngā motuka, ngā rauemi hu, ngā paipa, ngā takai ngāwari, ngā paninga, ngā peita, ngā muka, me te whānuitanga o ngā hua kirihou kua hangaia me ngā hua kirihou kua whakarerekētia.
I te mea kua piki haere te aro o te umanga ki te whakapiki ake i te hua, te kaha ake o te whakahaere kounga, te whakaiti i ngā tere para, me te whakapai ake i te pumau o ngā rauemi, kāore ngā tāpiringa silicone e kiia ana he āwhina tukatuka ngāwari. Engari, kua whakauruhia haeretia hei wāhanga hanga mahi i roto i te hoahoa pūnaha polymer, e whai wāhi tika ana ki te pai o te tukatuka me te mahi hua whakamutunga.
Nā reira, kua noho ngā kaihanga tāpiri silicone hei hoa hangarau matua puta noa i te mekameka uara polymer o te ao.
E whakamārama ana tēnei tuhinga i ngā kaihanga tāpiri silicone tekau o runga rawa o te ao, hei āwhina i ngā tukatuka ki te tautuhi i ngā kaiwhakarato matua, ngā hangarau, me ngā otinga mō ngā tono tukatuka polymer.

He aha ngā tāpiringa silicone?
Ko ngā tāpiringa silicone—e mōhiotia ana ko ngā tāpiringa silicone-based, ngā tāpiringa siloxane, ngā tāpiringa polysiloxane rānei—he āwhina tukatuka mahi me ngā rauemi whakarei ake i te mahi e hangai ana ki te polydimethylsiloxane (PDMS) me ngā matū organosilicon kua whakarerekētia.
Ka whakauruhia ēnei ki ngā kukū iti noa iho (ko te tikanga 0.1–5%) hei whakapai ake i te ngāwari o te tukatuka, i ngā āhuatanga o te mata, me te roa o te mau o te hua.
Ngā Mahi Matua
• Te whakaiti i te waku rewa me te whakapai ake i te whanonga rere
• Te ārai i ngā hapa o te mata pērā i te pakaru rewa me te kiri mangō
• Te whakaiti i te hanga o ngā mate me te whakaiti i te paru o ngā taputapu
• Te whakarei ake i te maeneene o te mata me ngā āhuatanga pā
• Te whakapai ake i te pumau me te nui o te whakaputanga

Te Matū Matua o ngā Tāpiringa Silicone
Ko te mahi a ngā tāpiringa silicone i ahu mai i tō rātou tuara silicon-hāora (Si-O) ngāwari, he maha ngā wā ka mahi tahi me ngā rōpū taha waro pērā i te methyl.
Mā tēnei hanganga ngota ngota ahurei ka whakaratohia:
• He iti te kukū o te mata mō te hinu whakahinuhinu pai rawa atu
• Te pumau nui o te wera me te waikura i raro i ngā tikanga tukatuka uaua
• Te ātete wai e āwhina ana ki te tiaki i ngā mata polymer mai i te makuku
• He tino pai te paheke me te whakahinuhinu, e whakaiti ana i te ahotea kutikuti i te wā e whakaputa ana me te hanga
• Te koretake o te matū me te ngāwari, e āhei ai te hototahi ki te whānuitanga o ngā polymer

Ngā Momo Tāpiri Silicone Hou
Ka hangaia ngā tāpiringa silicone kia tutuki ai ngā whakaritenga mahi motuhake i runga i te taumaha ngota ngota, ngā rōpū mahi, me te hoahoa polymer. Ko ngā momo ahumahi noa ko ngā wai silicone (hinu), ngā siloxanes, ngā silicone kua whakarerekētia e te polyether, ngā kapia silicone, ngā puranga silicone matua, me ngā paura silicone.

1. Pūmua Matua Silicone
Ko te silicone masterbatch he whakatakotoranga pelleted kounga teitei e whakamahia whānuitia ana i roto i te umanga polymer. Ko te hangarau hou e whakawhirinaki ana ki te horapa i ngā polymer siloxane taumaha-teitei (UHMW) ki roto i ngā momo kawe thermoplastic (tae atu ki ngā polyolefin, ngā kirihou hangarau, me ngā elastomers thermoplastic). Ka tukuna i roto i te ahua pellet paerewa, ka taea te horopeta ma, tika ki roto i te matrix thermoplastic i te wā e whakakotahi ana, e extrusion ana, e werohanga ana rānei. He rerekē ki ngā ware pi tuku iho, ngā amides waikawa ngako, ngā hinu taumaha-iti rānei, ka whakaratohia e ngā UHMW silicone masterbatch te paheke mata me te tuku pokepokea ai, me te karo i ngā hapa tukatuka pēnei i te paheke tīwiri.

2. Ngā Wai Hiraka (PDMS)
Ko ngā Wai Hiraka (PDMS) he iti ki te reo te taumaha ngota, he raina, he kore-tauhohenga ngā hiraka, e tohuhia ana e te tuara hiraka-hāora (-Si-O-) auau me ngā rōpū taha methyl. I roto i te tukatuka pūmua, ko te mahi matua he āwhina tukatuka ā-tinana rangitahi me ngā hinu whakahinuhinu o waho. Nā te nui o te nekenekehanga ngota me te kore hononga matū ki te pūtake pūmua manaaki, ka whakaitihia e rātou te matotoru rewa me te taipana engari he tino ngāwari ki te heke, ka arahi ki te putanga o te mata, te paheke o te tīwiri, me te korenga o te piri o te peita, te tā rānei.

3. Ngā Tāpiritanga Organosilicone Mahi
Ko ngā Tāpiri Organosilicone Mahi he copolymers silicone kua whakarerekētia e te tinana, e whakauru ana i ngā rōpū mahi tauhohe, polar rānei (pēnei i te epoxy, amino, carboxy, vinyl, polyether rānei) ki roto i te tuara siloxane, i ngā pito mekameka rānei. He rerekē ki te PDMS tikanga, he mea hanga ēnei tāpiri i te ngota hei mahi hei whakarerekētanga ā-kanohi me te hototahi tauhohe. Ka whakaitihia e rātou te taumahatanga ā-kanohi, ka whakarei ake i te piri o te wāhanga i waenga i ngā wāhanga kore-hototahi, ka waiho hei mea nui mō te whakapai ake i ngā kirihou hangarau, te whakanui ake i te mahi o ngā polymers hangarua/PCR, me te whakapai ake i te whakamakuku me te horapa o te whakakī (hei tauira, ngā aukati mura kore-halogen, ngā muka karāhe) i roto i ngā pūnaha polymer maha-wāhanga.

4. Paura Silicone
Ko ngā Paura Silicone he hanganga silicone matūriki e rere noa ana, he totoka, he matūriki, he maha ngā wā he mea hanga mai i ngā polymer siloxane taumaha-rahi (UHMW) e mau ana ki roto i te matua silica kore-waro, i ngā kapia silicone porowhita-toru-ahu rānei (hei tauira, te polymethylsilsesquioxane). I hangaia hei whakarerekētanga mahi tuturu, ka whakakotahihia ki roto i ngā kirihou wera hei whakarato i ngā whakapainga mata roa - pērā i te ātete ki te rakuraku me te kakahu tuturu, te whakaiti pumau i te Tauwehenga o te Waku (COF), me ngā āhuatanga ārai-aukati - me te kore e whakararu i ngā āhuatanga miihini o te papa, i te kaha rānei ki te peita i muri i te tukatuka.