Nkà na ụzụ |Kedu ihe ndị metụtara na Njirimara nke Polyurethane Flexible Foam

Kedu ihe kpatara enwere ọtụtụ ụdị ụfụfụ polyurethane na-agbanwe agbanwe na ọtụtụ ngwa?Nke a bụ n'ihi ụdị ngwaahịa dị iche iche nke mmepụta ihe, nke mere na njirimara nke ụfụfụ polyurethane na-agbanwe agbanwe dịkwa iche.Mgbe ahụ, ihe ndị a na-eji maka ụfụfụ polyurethane na-agbanwe agbanwe Olee mmetụta dị n'ụdị ngwaahịa a rụchara?

1. Polyether polyol

Dị ka isi akụrụngwa maka imepụta ụfụfụ polyurethane na-agbanwe agbanwe, polyether polyol na-emeghachi omume na isocyanate iji mepụta urethane, nke bụ mmeghachi omume ọkpụkpụ nke ngwaahịa ụfụfụ.Ọ bụrụ na ọnụ ọgụgụ nke polyether polyol na-abawanye, ọnụ ọgụgụ nke ihe ndị ọzọ (isocyanate, mmiri na catalyst, wdg) na-ebelata, nke dị mfe ime ka mgbawa ma ọ bụ daa nke ngwaahịa ụfụfụ polyurethane na-agbanwe.Ọ bụrụ na ọnụ ọgụgụ nke polyether polyol na-ebelata, ngwaahịa ụfụfụ polyurethane na-agbanwe agbanwe ga-esi ike ma na-agbanwe agbanwe ga-ebelata, na mmetụta aka ga-adị njọ.

2. Onye na-afụ ụfụfụ

N'ozuzu, naanị mmiri (onye na-eme ụfụfụ kemịkalụ) ka a na-eji dị ka onye na-emepụta ụfụfụ na-emepụta polyurethane blocks nke nwere njupụta dị elu karịa 21g/cm3, na isi ihe na-esi ísì ụtọ dị ka methylene chloride (MC) ka a na-eji na-emepụta obere njupụta ma ọ bụ ultra. -dị nro.Ngwakọta (ihe ndị na-afụ ụfụ anụ ahụ) na-arụ ọrụ dị ka ihe enyemaka inyeaka.

Dị ka onye na-efe efe, mmiri na-emeghachi omume na isocyanate iji mepụta njikọ urea ma hapụ nnukwu CO2 na okpomọkụ.Mmeghachi omume a bụ mmeghachi omume ndọtị agbụ.Ka mmiri na-abawanye, na-ebelata njupụta ụfụfụ na ike siri ike.N'otu oge ahụ, ogidi sel na-adị ntakịrị ma na-esiwanye ike, nke na-ebelata ikike ibu, ma na-adaba na mgbawa.Na mgbakwunye, oriri nke isocyanate na-abawanye, na ntọhapụ okpomọkụ na-abawanye.Ọ dị mfe ime ka isi ọkụ.Ọ bụrụ na oke mmiri karịrị akụkụ 5.0, a ga-agbakwunye ihe na-eme ụfụfụ anụ ahụ iji nweta akụkụ nke okpomọkụ ma zere isi ọkụ.Mgbe ọnụ ọgụgụ mmiri na-ebelata, a na-ebelata ọnụ ọgụgụ nke catalyst, ma njupụta nke ụfụfụ polyurethane na-agbanwe agbanwe na-abawanye.

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Ihe inyeaka na-afụ ụfụ ga-ebelata njupụta na ike nke ụfụfụ na-agbanwe polyurethane.Ebe ọ bụ na onye na-enye aka na-afụ ụfụ na-etinye akụkụ nke okpomọkụ mmeghachi omume n'oge gasification, a na-ebelata ọnụ ọgụgụ ọgwụgwọ, n'ihi ya, ọ dị mkpa iji mee ka ọnụ ọgụgụ nke ihe na-eme ka ọ dịkwuo mma;n'otu oge ahụ, n'ihi na gasification na-etinye akụkụ nke okpomọkụ, ihe ize ndụ nke isi ọkụ na-ezere.

3. Toluene diisocyanate

Polyurethane na-agbanwe ụfụfụ na-ahọrọkarị T80, ya bụ, ngwakọta nke isomers abụọ nke 2,4-TDI na 2,6-TDI na oke nke (80 ± 2)% na (20± 2)%.

Mgbe ndepụta isocyanate dị oke elu, elu ahụ ga-adị ogologo oge, mkpakọ mkpakọ nke ahụ ụfụfụ ahụ ga-abawanye, usoro netwọkụ ụfụfụ ga-adị njọ, cell mechiri emechi ga-abawanye, nlọghachi azụ ga-ebelata, na mgbe ụfọdụ. ngwaahịa ga-agbawa.

Ọ bụrụ na index isocyanate dị oke ala, a ga-ebelata ike arụ ọrụ na nkwụghachi nke ụfụfụ ahụ, nke mere na ụfụfụ ahụ na-adị mfe nke ọma, nke ga-emecha mee ka nsogbu nke usoro nkwụsịtụ na-adịghị mma;na mgbakwunye, ọ bụrụ na index isocyanate dị oke ala, ọ ga-emekwa ka nchịkọta mkpakọ nke polyurethane foam buru ibu, na elu nke ụfụfụ ahụ na-adịkarị ka mmiri.

4. Ihe na-akpata

1. Tertiary amine catalyst: A33 (triethylenediamine solution with a mass partition of 33%) na-ejikarị eme ihe, na ọrụ ya bụ ịkwalite mmeghachi omume nke isocyanate na mmiri, dozie njupụta nke ụfụfụ na ọnụ ọgụgụ mmeghe nke afụ, wdg. ., tumadi iji kwalite mmeghachi omume ụfụfụ.

Ọ bụrụ na ọnụ ọgụgụ nke tertiary amine catalyst dị ukwuu, ọ ga-eme ka ngwaahịa polyurethane foam kewaa, na a ga-enwe pores ma ọ bụ afụ na ụfụfụ;Ọ bụrụ na ọnụọgụ nke amine catalyst dị ntakịrị, ụfụfụ polyurethane ga-esi na ya pụta ga-adalata, sel mechiri emechi, ma mee ka ngwaahịa ụfụfụ dị ala.

2. Organometallic catalyst: T-9 na-ejikarị eme ihe dị ka organotin octoate catalyst;T-9 bụ mmeghachi omume gel na-arụ ọrụ dị elu, na ọrụ ya bụ ịkwalite mmeghachi omume gel, ya bụ, mmeghachi omume na-esote.

Ọ bụrụ na ọnụọgụ organotin catalyst na-abawanye nke ọma, enwere ike nweta ezigbo ụfụfụ polyurethane na-emeghe.Ịbawanye ụba nke organotin catalyst ga-eme ka ụfụfụ ahụ jiri nwayọọ nwayọọ na-esiwanye ike, na-ebute mbelata na sel mechiri emechi.

Mbelata ego nke tertiary amine catalyst ma ọ bụ ịba ụba nke organotin catalyst nwere ike ịbawanye ike nke mgbidi ihe nkiri polymer afụ mgbe a na-emepụta nnukwu gas, si otú ahụ na-ebelata ihe ngosi nke oghere ma ọ bụ mgbawa.

Ma polyurethane foam nwere ezigbo sel mepere emepe ma ọ bụ ihe mechiri emechi na-adabere na ma ọsọ mmeghachi omume gel na ọsọ mgbasawanye gas na-edozi n'oge a na-emepụta ụfụfụ polyurethane.Enwere ike nweta nguzozi a site n'ịgbanwe ụdị na ego nke tertiary amine catalyst catalysis na foam stabilization na ndị ọzọ na-enyere aka na nhazi ahụ.

Nkwupụta: E si na ya pụtahttps://mp.weixin.qq.com/s/JYKOaDmRNAXZEr1mO5rrPQ (njikọ jikọtara).Naanị maka nkwurịta okwu na mmụta, emela ebumnuche azụmahịa ndị ọzọ, anaghị anọchite anya echiche na echiche nke ụlọ ọrụ ahụ, ọ bụrụ na ịchọrọ ibipụtaghachi, biko kpọtụrụ onye edemede mbụ, ma ọ bụrụ na e nwere mmebi iwu, biko kpọtụrụ anyị ozugbo iji wepụ nhazi.