Nkwadebe na njirimara nke polyurethane ọkara siri ike ụfụfụ maka aka ụgbọ ala na-arụ ọrụ dị elu.
Ogwe aka dị n'ime ime ụgbọ ala bụ akụkụ dị mkpa nke ụgbọ ala, nke na-arụ ọrụ nke ịkwanye na ịdọrọ ọnụ ụzọ na itinye ogwe aka nke onye ahụ n'ime ụgbọ ala ahụ. N'ọnọdụ mberede, mgbe ụgbọ ala na nkukota aka, polyurethane soft handrail na gbanwetụrụ PP (polypropylene), ABS (polyacrylonitrile - butadiene - styrene) na ndị ọzọ siri ike plastic handrail, nwere ike inye ezi elasticity na nchekwa, si otú ibelata mmerụ. Polyurethane dị nro ụfụfụ aka nwere ike inye aka dị mma na ọdịdị elu mara mma, si otú ahụ na-eme ka nkasi obi na ịma mma nke kokpiiti dịkwuo mma. Ya mere, site na mmepe nke ụlọ ọrụ ụgbọ ala na imeziwanye ihe ndị mmadụ chọrọ maka ihe ndị dị n'ime ụlọ, uru nke polyurethane soft foam na akpaaka ụgbọ ala na-aghọwanye ihe doro anya.
Enwere ụdị ụzọ atọ dị nro nke polyurethane: ụfụfụ resilience dị elu, ụfụfụ nke onwe ya na ụfụfụ siri ike. A na-eji PVC (polyvinyl chloride) kpuchie elu elu elu nke elu aka aka, na ime ya bụ ụfụfụ dị elu nke polyurethane. Nkwado nke ụfụfụ ahụ adịghị ike, ike dị ntakịrị, na nchikota n'etiti ụfụfụ na akpụkpọ ahụ ezughị oke. Ọdụdọ aka nke ejiri aka ya nwere akpụkpọ anụ akpụkpọ anụ, ọnụ ala dị ala, ogo ntinye aka dị elu, a na-ejikwa ya na ụgbọ ala azụmahịa, ma ọ na-esiri ike iburu n'uche ike nke elu na nkasi obi zuru oke. Semi-isiike armrest na-kpuchie na PVC akpụkpọ, akpụkpọ na-enye mma aka na ọdịdị, na esịtidem ọkara isiike ụfụfụ nwere magburu onwe mmetụta, mmetụta eguzogide, ume absorption na ịka nká na-eguzogide, n'ihi ya, ọ na-na ndị ọzọ n'ọtụtụ ebe na-eji na ojiji nke. ime ụgbọ ala njem.
N'akwụkwọ a, a na-emepụta ihe bụ isi nke ụfụfụ polyurethane nke na-esighị ike maka ụgbọ ala ụgbọ ala, a na-amụkwa ọganihu ya na ndabere a.
Ngalaba nnwale
Isi akụrụngwa
Polyether polyol A (hydroxyl uru 30 ~ 40 mg/g), polymer polyol B (hydroxyl uru 25 ~ 30 mg/g): Wanhua Chemical Group Co., LTD. MDI gbanwetụrụ [diphenylmethane diisocyanate, w (NCO) bụ 25% ~ 30%], ihe na-eme ka ihe mejupụtara ya, wetting dispersant (Agent 3), antioxidant A: Wanhua Chemical (Beijing) Co., LTD., Maitou, wdg .; Onye na-ekesa mmiri mmiri (Agent 1), onye na-ekesa mmiri mmiri (Agent 2): Byke Chemical. Ngwa ndị dị n'elu bụ ọkwa mmepụta ihe. PVC mkpuchi akpụkpọ: Changshu Ruihua.
Isi akụrụngwa na ngwa
Sdf-400 ụdị akwa ngwa ngwa igwekota, AR3202CN ụdị eletrọnịkị itule, aluminum ebu (10cm × 10cm × 1cm, 10cm × 10cm × 5cm), 101-4AB ụdị electric blower oven, KJ-1065 ụdị electronic eluigwe na ala esemokwu igwe, 501A ụdị ibu. thermostat.
Nkwadebe nke isi usoro na sample
A na-egosiputa ihe nrịbama nke ụfụfụ polyurethane siri ike na tebụl 1.
Nkwadebe nke ihe eji eme ihe eji eme ihe nnwale: a kwadebere polyether composite (A ihe) dị ka usoro nhazi ahụ si dị, gwakọta ya na MDI gbanwere n'otu akụkụ, kpaliri ya na ngwa mkpali dị elu (3000r / min) maka 3 ~ 5s. , wee wụsara n'ime kwekọrọ ekwekọ ebu ka ụfụfụ, na meghere ebu n'ime oge ụfọdụ iji nweta ọkara isiike polyurethane ụfụfụ kpụrụ sample.
Nkwadebe nke ihe nlele maka nyocha arụmọrụ nke njikọta: a na-etinye akwa akpụkpọ anụ PVC n'ime obere anwụ nke ebu ahụ, na-ejikọta polyether na MDI gbanwetụrụ n'ụzọ kwesịrị ekwesị, kpaliri site na ngwa ngwa ngwa ngwa ngwa ngwa (3 000 r / min). ) maka 3 ~ 5 s, wee wụsa ya n'elu akpụkpọ ahụ, a na-emechikwa ihe ọkpụkpụ ahụ, a na-akpụkwa ụfụfụ polyurethane na akpụkpọ ahụ n'ime oge ụfọdụ.
Nnwale arụmọrụ
Ihe eji arụ ọrụ: 40% CLD (ike siri ike) dị ka ule ọkọlọtọ ISO-3386 si dị; A na-anwale ike tensile na elongation na nkwụsịtụ dịka ọkọlọtọ ISO-1798; A na-anwale ike anya mmiri dịka ọkọlọtọ ISO-8067 si dị. Ịrụ ọrụ nkekọ: A na-eji igwe eletrọnịkị eluigwe na ala akpata oyi n'ahụ na-ehicha akpụkpọ ahụ na ụfụfụ 180 ° dịka ọkọlọtọ OEM si dị.
Ịka nká arụmọrụ: Nwalee ọnwụ nke n'ibu Njirimara na bonding Njirimara mgbe awa 24 nke ịka nká na 120 ℃ dị ka ọkọlọtọ okpomọkụ nke OEM.
Nsonazụ na mkparịta ụka
Ihe eji arụ ọrụ
Site n'ịgbanwe nha nke polyether polyol A na polymer polyol B na usoro bụ isi, a na-enyocha mmetụta nke usoro ọgwụgwọ polyether dị iche iche na akụrụngwa nke ụfụfụ polyurethane siri ike, dị ka egosiri na Tebụl 2.
Enwere ike ịhụ site na nsonaazụ dị na Tebụl 2 na nha nke polyether polyol A na polymer polyol B nwere mmetụta dị ukwuu na ihe eji arụ ọrụ nke ụfụfụ polyurethane. Mgbe nha nke polyether polyol A na polymer polyol B na-abawanye, elongation na nkwụsịtụ na-abawanye, ike ike nke mkpakọ na-ebelata ruo n'ókè ụfọdụ, ike nkwụsị na ike ịdọka na-agbanwe ntakịrị. The molekụla yinye nke polyurethane tumadi mejupụtara akụkụ dị nro na akụkụ siri ike, akụkụ dị nro sitere na polyol na akụkụ siri ike sitere na njikọ carbamate. N'otu aka ahụ, ịdị arọ molecular dị arọ na uru hydroxyl nke polyols abụọ ahụ dị iche, n'aka nke ọzọ, polymer polyol B bụ polyether polyol nke acrylonitrile na styrene gbanwere, na nkwụsi ike nke agbụ a na-eme ka ọ dịkwuo mma n'ihi na ịdị adị nke mgbanaka benzene, ebe polymer polyol B nwere obere ihe molekul, nke na-eme ka ụfụfụ dị nro. Mgbe polyether polyol A bụ akụkụ 80 na polymer polyol B bụ akụkụ 10, ihe nrụpụta ọrụ zuru oke nke ụfụfụ dị mma.
Nkwụnye ego
Dị ka ngwaahịa nwere nnukwu mgbasa ozi ugboro ugboro, handrail ga-ebelata nkasi obi nke akụkụ ahụ ma ọ bụrụ na ụfụfụ na akpụkpọ anụ ahụ, ya mere a chọrọ njikọ nke ụfụfụ polyurethane na akpụkpọ anụ. Na ndabere nke nyocha a dị n'elu, a na-agbakwunye ndị na-ekesa mmiri dị iche iche iji nwalee njirimara njigide nke ụfụfụ na akpụkpọ ahụ. E gosipụtara nsonaazụ ya na tebụl 3.
Enwere ike ịhụ site na Tebụl 3 na ndị na-ekesa wetting dị iche iche nwere mmetụta doro anya na ike peeling n'etiti ụfụfụ na akpụkpọ ahụ: ụfụfụ ụfụ na-eme mgbe ejiri ihe mgbakwunye 2 mee ihe, nke nwere ike ime site na nnukwu oghere nke ụfụfụ mgbe agbakwunyere ihe mgbakwunye. 2; Mgbe ejiri ihe mgbakwunye 1 na 3 mee ihe, ike iwepụ nke oghere oghere nwere mmụba ụfọdụ, na ike iwepụ ihe mgbakwunye 1 bụ ihe dịka 17% dị elu karịa nke oghere oghere, na ike nkwụsị nke ihe mgbakwunye 3 bụ ihe dị elu. ihe dị ka 25% dị elu karịa nke ihe nlele efu. Ọdịiche dị n'etiti mgbakwunye 1 na mgbakwunye 3 bụ nke kpatara ọdịiche dị na wettability nke ihe mejupụtara n'elu. N'ozuzu, iji nyochaa wettability nke mmiri mmiri na siri ike, kọntaktị Angle bụ ihe dị mkpa oke iji tụọ elu wettability. Ya mere, a nwalere akụkụ kọntaktị dị n'etiti ihe mejupụtara ihe na akpụkpọ ahụ mgbe agbakwunyere ndị na-ekesa wetting abụọ dị n'elu, na-egosikwa nsonaazụ ya na foto 1.
Enwere ike ịhụ site na eserese 1 na kọntaktị Angle nke oghere oghere bụ nke kachasị, nke bụ 27 °, na kọntaktị Angle nke onye inyeaka 3 bụ nke kacha nta, nke bụ naanị 12 °. Nke a na-egosi na iji ihe mgbakwunye 3 nwere ike imeziwanye wettability nke ihe mejupụtara ihe na akpụkpọ ahụ ruo n'ókè dị ukwuu, ọ dịkwa mfe ịgbasa n'elu akpụkpọ ahụ, ya mere iji ihe mgbakwunye 3 nwere ike peeling kasịnụ.
Ihe onwunwe ịka nká
A na-agbanye ngwaahịa handrail n'ime ụgbọ ala, ugboro ole ikpughe ìhè anyanwụ dị elu, na arụmọrụ ịka nká bụ ọrụ ọzọ dị mkpa nke polyurethane semi-rigid handrail foam kwesịrị ịtụle. Ya mere, a nwalere arụmọrụ ịka nká nke usoro bụ isi na a na-eme nchọpụta ọganihu, na e gosipụtara nsonaazụ ya na Tebụl 4.
Site n'ịtụle data dị na Tebụl 4, enwere ike ịhụ na akụrụngwa akụrụngwa na njikọta nke usoro bụ isi na-ebelata nke ukwuu mgbe ịka nká na 120 ℃: mgbe ịkachara 12h, ọnwụ nke ihe dị iche iche ma e wezụga njupụta (otu n'okpuru) bụ 13% ~ 16%; Ọnwụ arụmọrụ nke 24h ịka nká bụ 23% ~ 26%. A na-egosi na ihe ọkụkụ na-eme agadi nke usoro bụ isi adịghị mma, na ihe ọkụkụ na-eme agadi nke usoro mbụ nwere ike ime ka ọ dịkwuo mma site n'ịgbakwunye A klas nke antioxidant A na usoro. N'okpuru otu nnwale ahụ mgbe mgbakwunye nke antioxidant A, ọnwụ nke ihe dị iche iche mgbe 12h bụ 7% ~ 8%, na ọnwụ nke ihe dị iche iche mgbe 24h gasịrị bụ 13% ~ 16%. Mbelata nke akụrụngwa akụrụngwa bụ n'ihi usoro mmeghachi omume yinye nke sitere na nkekọ nke kemịkalụ na radicals na-arụ ọrụ n'oge usoro ịka nká, na-ebute mgbanwe dị mkpa na nhazi ma ọ bụ njirimara nke ihe mbụ ahụ. N'otu aka ahụ, mbelata nke arụmọrụ njikọta bụ n'ihi mbelata nke akụrụngwa nke ụfụfụ n'onwe ya, n'aka nke ọzọ, n'ihi na akpụkpọ anụ PVC nwere ọnụ ọgụgụ dị ukwuu nke plasticizers, na plasticizer na-akwaga n'elu n'oge usoro ahụ. nke thermal oxygen ịka nká. Mgbakwunye nke antioxidants nwere ike imeziwanye njirimara ịka nká ya, tumadi n'ihi na antioxidants nwere ike iwepụ ihe ndị na-emepụta free radicals, na-egbu oge ma ọ bụ gbochie usoro oxidation nke polymer, ka ọ wee nọgide na-enwe ihe mbụ nke polymer.
arụmọrụ zuru oke
Dabere na nsonaazụ ndị a dị n'elu, a haziri usoro kachasị mma yana enyocha ihe onwunwe ya dị iche iche. Arụmọrụ nke usoro a tụnyere nke izugbe polyurethane high rebound handrail foam. E gosipụtara nsonaazụ ya na tebụl 5.
Dị ka a na-ahụ na Tebụl 5, ịrụ ọrụ nke usoro ụfụfụ polyurethane siri ike nke dị mma nwere ụfọdụ uru karịa usoro ndị bụ isi na n'ozuzu ya, ọ dịkwa irè karị, ọ dịkwa mma maka itinye aka na-arụ ọrụ dị elu.
Mmechi
Ịgbanwe ọnụọgụ nke polyether na ịhọrọ onye na-ekesa wetting ruru eru na antioxidant nwere ike inye ụfụfụ polyurethane siri ike nke ọma, ihe ndị dị mma na-ekpo ọkụ na ihe ndị ọzọ. Dabere na arụmọrụ dị mma nke ụfụfụ ahụ, ngwaahịa a na-arụ ọrụ polyurethane ọkara siri ike nwere ike itinye ya na ihe nchekwa ụgbọ ala dịka aka aka na tebụl ngwá ọrụ.
Oge nzipu: Jul-25-2024