Hoʻomākaukau a me nā hiʻohiʻona o ka polyurethane semi-rigid foam no nā lima lima kaʻa hana kiʻekiʻe.
ʻO ka hoʻomaha lima i loko o ke kaʻa he mea nui ia o ke kaʻa, e pāʻani ana i ka hana o ka huki ʻana a huki i ka puka a kau i ka lima o ke kanaka i loko o ke kaʻa. I ka hopena o ka pilikia, i ka wā e hui ai ke kaʻa a me ka lima lima, polyurethane soft handrail a me PP (polypropylene) hoʻololi ʻia, ABS (polyacrylonitrile - butadiene - styrene) a me nā lima lima paʻa paʻa, hiki ke hāʻawi i ka elasticity maikaʻi a me ka pale, e hōʻemi ai i ka ʻeha. Hiki i nā lima lima palupalu polyurethane ke hāʻawi i ka manaʻo lima maikaʻi a me ke ʻano o ka ʻili nani, e hoʻomaikaʻi ai i ka ʻoluʻolu a me ka nani o ka cockpit. No laila, me ka hoʻomohala ʻana o ka ʻoihana kaʻa a me ka hoʻomaikaʻi ʻana i nā koi o ka poʻe no nā mea o loko, ʻoi aku ka nui o nā pono o ka polyurethane soft foam i nā lima lima kaʻa.
ʻEkolu ʻano o ka polyurethane soft handrails: high resilience foam, self-crusted foam a me semi-rigid foam. Ua uhi ʻia ka ʻili o waho o nā lima lima kūpaʻa kiʻekiʻe me ka ʻili PVC (polyvinyl chloride), a ʻo loko ka polyurethane high resilience foam. ʻO ke kākoʻo o ka'ōhū he mea nāwaliwali, he haʻahaʻa ka ikaika, aʻaʻole lawa ka piliʻana ma waena o ka'ōhū a me kaʻili. ʻO ka lima lima ʻili ponoʻī he ʻāpana kumu o ka ʻili, ke kumu kūʻai haʻahaʻa, ke kiʻekiʻe o ka hoʻohui ʻana, a hoʻohana nui ʻia i nā kaʻa kalepa, akā paʻakikī ke noʻonoʻo i ka ikaika o ka ʻili a me ka hōʻoluʻolu holoʻokoʻa. Hoʻopili ʻia ka lima lima Semi-rigid me ka ʻili PVC, hāʻawi ka ʻili i ka paʻi maikaʻi a me ka hiʻohiʻona, a ʻo ka semi-rigid foam i loko ka manaʻo maikaʻi loa, ka hopena o ka hopena, ka hoʻopili ʻana i ka ikehu a me ke kūpaʻa ʻelemakule, no laila ua hoʻohana nui ʻia i ka hoʻohana ʻana. kaʻa kaʻa i loko.
Ma kēia pepa, ua hoʻolālā ʻia ke ʻano kumu o ka polyurethane semi-rigid foam no nā kaʻa lima lima, a ua aʻo ʻia kona hoʻomaikaʻi ʻana ma kēia kumu.
Māhele hoʻokolohua
Mea maka nui
Polyether polyol A (waiwai hydroxyl 30 ~ 40 mg / g), polymer polyol B (waiwai hydroxyl 25 ~ 30 mg / g): Wanhua Chemical Group Co., LTD. ʻO MDI i hoʻololi ʻia [diphenylmethane diisocyanate, w (NCO) he 25% ~ 30%], ka mea hoʻoheheʻe composite, wetting dispersant (Agent 3), antioxidant A: Wanhua Chemical (Beijing) Co., LTD., Maitou, etc.; Wetting dispersant (Agent 1), wetting dispersant (Agent 2): Byke Chemical. ʻO nā mea maka ma luna nei he ʻano hana ʻoihana. ʻO ka ʻili pale PVC: Changshu Ruihua.
ʻO nā mea hana nui a me nā mea kani
Sdf-400 type mixer kiʻekiʻe, AR3202CN type electronic balance, alumini mold (10cm×10cm×1cm, 10cm×10cm×5cm), 101-4AB type uwila puhi, KJ-1065 type electronic universal tension machine, 501A type super mea hoʻopaʻa wela.
Ka hoʻomākaukau ʻana i ke kumu kumu a me ka laʻana
Hōʻike ʻia ka hana maʻamau o ka semi-rigid polyurethane foam ma ka Papa 1.
ʻO ka hoʻomākaukau ʻana i ka laʻana hoʻāʻo mechanical properties: ua hoʻomākaukau ʻia ka polyether composite (He mea) e like me ke ʻano hoʻolālā, i hui pū ʻia me ka MDI i hoʻololi ʻia i kekahi ʻāpana, hoʻoulu ʻia me kahi mea hoʻoulu kiʻekiʻe (3000r / min) no 3 ~ 5s , A laila ninini ʻia i loko o ka ʻōpala e pili ana i ka huʻa, a wehe i ka ʻōpala i loko o kekahi manawa e loaʻa ai ka semi-rigid polyurethane foam molded sample.
Ka hoʻomākaukau ʻana o ka laʻana no ka hoʻopaʻa ʻana i ka hana hoʻāʻo: kau ʻia kahi ʻili o ka PVC ma ka make haʻahaʻa o ka mold, a hui pū ʻia ka polyether a me ka MDI i hoʻololi ʻia, i hoʻoulu ʻia e kahi mea hoʻoulu kiʻekiʻe (3 000 r / min. ) no 3 ~ 5 s, a laila ninini ʻia i loko o ka ʻili o ka ʻili, a pani ʻia ka ʻōpala, a hoʻoheheʻe ʻia ka polyurethane foam me ka ʻili i loko o kekahi manawa.
Hoao hana
Mechanical waiwai: 40%CLD (compressive hardness) e like me ka ISO-3386 ho'āʻo maʻamau; Ho'āʻo ʻia ka ikaika tensile a me ka elongation i ka wā haki e like me ka maʻamau ISO-1798; Hoʻāʻo ʻia ka ikaika waimaka e like me ka maʻamau ISO-8067. ʻO ka hana hoʻopaʻa ʻana: Hoʻohana ʻia ka mīkini uila uila e ʻili i ka ʻili a me ka huʻa 180 ° e like me ke kūlana o kahi OEM.
Hana ʻelemakule: E hoʻāʻo i ka nalowale o nā waiwai mechanical a me nā waiwai paʻa ma hope o 24 mau hola o ka ʻelemakule ma 120 ℃ e like me ka mahana maʻamau o kahi OEM.
Nā hualoaʻa a me ke kūkākūkā
Waiwai mīkini
Ma ka hoʻololi ʻana i ka lakio o ka polyether polyol A a me ka polymer polyol B i ke kumu kumu, ua ʻimi ʻia ka mana o nā ʻano polyether like ʻole i nā waiwai mechanical o ka semi-rigid polyurethane foam, e like me ka hōʻike ʻana ma ka Papa 2.
Hiki ke ʻike ʻia mai nā hualoaʻa ma ka Papa 2 he hopena koʻikoʻi ka ratio o ka polyether polyol A i ka polymer polyol B i nā waiwai mechanical o ka polyurethane foam. Ke piʻi aʻe ka ratio o ka polyether polyol A i ka polymer polyol B, piʻi ka elongation ma ka haʻihaʻi, hoʻemi ka paʻakikī compressive i kekahi ʻano, a hoʻololi iki ka ikaika tensile a me ka ikaika haehae. ʻO ke kaulahao mole o ka polyurethane ka hapa nui o ka ʻāpana palupalu a me ka ʻāpana paʻakikī, ʻāpana palupalu mai ka polyol a me ka ʻāpana paʻakikī mai ka paʻa carbamate. Ma ka ʻaoʻao hoʻokahi, ʻokoʻa ka paona molekala pili a me ka waiwai hydroxyl o nā polyols ʻelua, ma ka ʻaoʻao ʻē aʻe, ʻo ka polymer polyol B he polyether polyol i hoʻololi ʻia e ka acrylonitrile a me ka styrene, a ua hoʻomaikaʻi ʻia ka rigidity o ke kaulahao ma muli o ka ke ola o ke apo benzene, aʻo ka polymer polyol B aia nā mea molekala liʻiliʻi, kahi e hoʻonui ai i ka brittleness o ka huʻa. Inā he 80 mau ʻāpana ka polyether polyol A a ʻo ka polymer polyol B he 10 mau ʻāpana, ʻoi aku ka maikaʻi o nā waiwai mechanical piha o ka huʻa.
Waiwai pili
Ma ke ʻano he huahana me ke alapine paʻi kiʻekiʻe, e hōʻemi nui ka lima lima i ka hōʻoluʻolu o nā ʻāpana inā ʻili ka ʻili a me ka ʻili, no laila e koi ʻia ka hana paʻa ʻana o ka polyurethane foam a me ka ʻili. Ma ke kumu o ka noiʻi ma luna, ua hoʻohui ʻia nā dispersants pulu ʻokoʻa e hoʻāʻo ai i nā waiwai adhesion o ka huʻa a me ka ʻili. Hōʻike ʻia nā hopena ma ka Papa 3.
Hiki ke ʻike ʻia mai ka Papa 3 he mau hopena ʻike ʻia nā dispersants pulu ʻokoʻa i ka ikaika o ka ʻili ʻana ma waena o ka huʻa a me ka ʻili. 2; Ma hope o ka hoʻohana ʻana i nā mea hoʻohui 1 a me 3, ʻoi aku ka nui o ka ikaika o ka wehe ʻana o ka hāpana blank, a ʻo ka ikaika wehe ʻana o ka additive 1 ma kahi o 17% kiʻekiʻe ma mua o ka hāpana hakahaka, a ʻo ka ikaika wehe ʻana o ka additive 3 ʻo ia. ma kahi o 25% kiʻekiʻe ma mua o ka hāpana hakahaka. ʻO ka ʻokoʻa ma waena o ka additive 1 a me ka additive 3 ka mea nui ma muli o ka ʻokoʻa o ka pulu o ka mea hoʻohui ma ka ʻili. Ma keʻano laulā, no ka loiloi i ka pulu o ka wai ma luna o ka paʻa, ʻo ka Angle pili kahi ʻāpana koʻikoʻi e ana i ka pulu o ka ʻili. No laila, ua hoʻāʻo ʻia ka Angle hoʻopili ma waena o ka mea hoʻohuihui a me ka ʻili ma hope o ka hoʻohui ʻana i nā dispersant wai ma luna aʻe, a ua hōʻike ʻia nā hopena ma ke Kiʻi 1.
Hiki ke ʻike ʻia ma ka Figure 1 ʻo ka Angle hoʻopili o ka hāpana blank ka mea nui loa, ʻo ia ka 27°, a ʻo ka Angle hoʻopili o ka mea kōkua 3 ka mea liʻiliʻi loa, ʻo ia ka 12° wale nō. Hōʻike kēia i ka hoʻohana ʻana i ka additive 3 hiki ke hoʻomaikaʻi i ka wettability o ka mea i hoʻohui ʻia a me ka ʻili i kahi ʻoi aku ka nui, a ʻoi aku ka maʻalahi o ka hoʻolaha ʻana ma ka ʻili o ka ʻili, no laila ʻo ka hoʻohana ʻana i ka additive 3 ʻoi aku ka ikaika o ka peeling.
Waiwai kahiko
Hoʻokomo ʻia nā huahana Handrail i ke kaʻa, kiʻekiʻe ke alapine o ka ʻike ʻana o ka lā, a ʻo ka hana ʻelemakule kekahi hana koʻikoʻi e noʻonoʻo ai ka polyurethane semi-rigid handrail foam. No laila, ua hoʻāʻo ʻia ka hana ʻelemakule o ke kumu kumu a ua hoʻokō ʻia ka noiʻi hoʻomaikaʻi, a ua hōʻike ʻia nā hopena ma ka Papa 4.
Ma ka hoʻohālikelike ʻana i ka ʻikepili ma ka Papa 4, hiki ke ʻike ʻia ua hoʻemi nui ʻia nā waiwai mechanical a me nā waiwai hoʻopaʻa o ke kumu kumu ma hope o ka ʻelemakule wela ma 120 ℃ : ma hope o ka ʻelemakule no 12h, ka nalowale o nā waiwai like ʻole koe ka nui (e like me lalo) ʻo 13% ~ 16%; ʻO ka lilo o ka hana o ka 24h kahiko he 23% ~ 26%. Hōʻike ʻia ʻaʻole maikaʻi ka waiwai ʻelemakule wela o ke kumu kumu, a hiki ke hoʻomaikaʻi maikaʻi ʻia ka waiwai ʻelemakule wela o ke kumu kumu ma ka hoʻohui ʻana i kahi papa antioxidant A i ke kumu. Ma lalo o nā kūlana hoʻokolohua like ma hope o ka hoʻohui ʻana o ka antioxidant A, ʻo ka nalowale o nā waiwai like ʻole ma hope o 12h he 7% ~ 8%, a ʻo ka nalowale o nā waiwai like ʻole ma hope o 24h he 13% ~ 16%. ʻO ka emi ʻana o nā waiwai mechanical ma muli o ke ʻano o nā hopena kaulahao i hoʻoiho ʻia e ka haki ʻana o ka paʻa kemika a me nā radical manuahi ikaika i ka wā o ke kaʻina ʻelemakule wela, e hopena i nā loli kumu i ka ʻano a i ʻole nā waiwai o ka mea kumu. Ma kekahiʻaoʻao,ʻo ka emiʻana o ka hana hoʻopaʻaʻana ma muli o ka emiʻana o nā mea mechanical o ka huʻa pono'ī, ma kekahiʻaoʻao, no ka mea, aia ka nui o nā plasticizers i kaʻili PVC, a ua neʻe ka plasticizer i kaʻili i ka wā o ka hana. o ka wela o ka oxygen elemakule. Hiki i ka hoʻohui ʻana o nā antioxidants ke hoʻomaikaʻi i kona mau ʻano wela wela, ʻo ka mea nui no ka mea hiki i nā antioxidants ke hoʻopau i nā radical manuahi hou, hoʻopaneʻe a keʻakeʻa paha i ke kaʻina oxidation o ka polymer, i mea e mālama ai i nā waiwai kumu o ka polymer.
Hoʻokō piha
Ma muli o nā hopena i luna, ua hoʻolālā ʻia ke kumu hoʻohālike maikaʻi loa a ua loiloi ʻia kona mau waiwai like ʻole. Ua hoʻohālikelike ʻia ka hana o ke ʻano me ka polyurethane high rebound handrail foam. Hōʻike ʻia nā hopena ma ka Papa 5.
E like me ka mea i ʻike ʻia mai ka Papa 5, ʻo ka hana o ka semi-rigid polyurethane foam formula maikaʻi loa i kekahi mau mea maikaʻi ma luna o nā kumu kumu a me nā kumu maʻamau, a ʻoi aku ka hana, a ʻoi aku ka kūpono no ka hoʻohana ʻana i nā handrails kiʻekiʻe.
Ka hopena
ʻO ka hoʻoponopono ʻana i ka nui o ka polyether a me ke koho ʻana i ka dispersant wetting kūpono a me ka antioxidant hiki ke hāʻawi i ka semi-rigid polyurethane foam i nā waiwai mechanical maikaʻi, nā waiwai ʻelemakule wela a pēlā aku. Ma muli o ka hana maikaʻi loa o ka pahu, hiki ke hoʻohana ʻia kēia huahana polyurethane semi-rigid foam kiʻekiʻe i nā mea pale kaʻa e like me nā lima lima a me nā papa mea kani.
Ka manawa hoʻouna: Iulai-25-2024