Ntụ ntụ latex a na-emegharị emegharịbụ ntụ ude a gbanwere agbanwe nke a na-enweta site na ịchacha ihe mkpuchi nke vinylacetase na ethylene tert carbonate VoVa ma ọ bụ alkene ma ọ bụ acrylic acid. Ọ nwere ike ịgbagharị agbagharị nke ọma, a na-agbagharịkwa ya ka ọ bụrụ ude mgbe ọ na-emetụ mmiri, ihe ndị dị na ya na-adịkwa ka ude mbụ ahụ.
Nnyocha e mere na ntụ ntụ latex redispersible malitere na 1934 site na iji IG Farbenindus AC na ntụ ntụ latex redispersible polyvinylidene nke Germany.
Na latex ntụ ntụ nke Japan. Mgbe Agha Ụwa nke Abụọ gasịrị, e nwere nnukwu ụkọ ọrụ na akụrụngwa owuwu, nke mere ka Europe, karịsịa Germany, jiri ọtụtụ ihe owuwu ntụ ntụ mee ka arụmọrụ owuwu dịkwuo mma. Na ngwụcha afọ 1950, Hearst Company na Wacker Chemical Company nke Germany malitere imepụta ntụ ntụ latex redispersible n'ụlọ ọrụ mmepụta ihe. N'oge ahụ, ntụ ntụ latex redispersible bụ nke ụdị polyvinyl acetate, nke a na-ejikarị eme ihe maka ihe nrapado osisi, ihe mkpuchi mgbidi, na ihe mgbidi simenti. Agbanyeghị, n'ihi oke okpomọkụ kacha nta nke ihe nkiri na-emepụta ihe na-eme ka ihe nrapado PVAc sie ike, enweghị ike iguzogide mmiri, na enweghị ike iguzogide alkali, ojiji ya pere mpe nke ukwuu.
Site na mmepụta ihe nke ude VAE na ude VA/VeoVa nke ọma,ntụ ntụ emulsion a na-emegharị emegharịSite na okpomọkụ kacha nta nke ihe nkiri na-emepụta nke 0C, ezigbo iguzogide mmiri na iguzogide alkali ka e mepụtara na 1960s. Mgbe nke ahụ gasịrị, a kwalitere ojiji ya nke ukwuu na Europe, oke ojiji ya gbasaakwara nwayọ nwayọ gaa na ihe mgbakwunye ụlọ dị iche iche na nke na-abụghị nke nhazi, mgbanwe ngwa agha akọrọ, ihe mkpuchi mgbidi na sistemụ mmecha, ihe mkpuchi mgbidi na ihe mkpuchi mkpuchi. Mpaghara mkpuchi ntụ ntụ na ihe mkpuchi ụlọ.
Mmepụta n'ime ụlọ nke ntụ ntụ latex redispersible N'afọ ndị na-adịbeghị anya, ọchịchọ makantụ ntụ latex a na-emegharị emegharịNa Yuropu na Ugwu Amerịka etoola nwayọ nwayọ. N'ụzọ megidere nke ahụ, site na mmejuputa iwu nchekwa ike ụlọ nke China na nkwalite siri ike nke ngwa agha akọrọ maka ụlọ, ojiji nke ntụ latex redispersible na China Mainland amụbaala ngwa ngwa. Ụlọ ọrụ mba ofesi na ụfọdụ ụlọ ọrụ ime obodo ebidola ọrụ nke ntụ latex redispersible na mba ahụ dum. Dịka ọnụ ọgụgụ ndị ọkachamara dị mkpa si kwuo, na 2003, mmepụta zuru ụwa ọnụ nke ntụ latex redispersible bụ tọn 190000, nke a na-ejikarị eme ihe na Europe na North America. Oriri na ahịa China erughị tọn 5000. Agbanyeghị, na 2007, oriri ahịa nke ntụ latex redispersible na China erutela tọn 450000, ndị na-ebubata ya bụ Dalian Chemical, Wacker si Germany, na National Starch si United States. A na-atụ anya na ka ọ na-erule 2010, ọchịchọ maka ntụ latex redispersible na China ga-eru tọn 100000.
Ụdị ntụ ntụ latex a na-agbanwe agbanwe:
Ụdị ntụ ntụ latex redispersible kachasị eji eme ihe ugbu a n'ahịa bụ:
Ntụ ntụ Vinyl acetate na ethylene copolymer (Vac/E), ethylene na vinyl chloride, na ntụ ntụ montmorillonite ethylene ternary copolymer (E/Vc/VL), vinyl acetate na ethylene na abụba acid dị elu ethylene ternary copolymer ntụ ntụ (Vac/E/VeoVa), vinyl acetate na abụba acid dị elu ethylene copolymer ntụ ntụ (Vac/VeoVa), acrylic acid na ethylene copolymer ntụ ntụ (A/S), vinyl acetate na acrylic acid, na abụba acid dị elu ethylene copolymer ntụ ntụ (Vac/A/VeoVa) Cool acid ethylene cooly homopolymer ntụ ntụ roba (PVac), styrene butadiene copolymer ntụ ntụ roba (SBR), wdg.
Ngwakọta nke ntụ ntụ latex a na-agbanwe agbanwe:
*Ntụ ntụ latex a na-agbaze agbaze na-abụkarị ntụ ọcha, mana enwere agba ole na ole ndị ọzọ dị. Ihe mejupụtara ya gụnyere: * Resin polymer: nke dị n'etiti ihe ntụ ntụ roba, ọ bụkwa ihe bụ isi enwere ike iji gbasaa ntụ ntụ latex
*Mgbakwunye (nke dị n'ime): A na-eji ya na resin emezi resin ahụ.
*Ihe mgbakwunye (mpụta): Iji mee ka arụmọrụ nke ntụ latex a na-agbanwe agbanwe dịkwuo elu, a na-agbakwunye ihe ndị ọzọ.
Colloid nchebe:
Oyi akwa nke ihe hydrophilic kechiri n'elu ihe ntụ ntụ latex a na-agbanwe agbanwe, ọtụtụ n'ime ha nwere ike ịgbasa ọzọ.
Ihe na-echebe colloid nke ntụ ntụ latex agbasasị bụ polyvinyl alcohol.
Ihe na-egbochi achịcha: A na-ejikarị ihe na-eme ka ihe dị n'ime mineral dị mma egbochi ịkpụ ntụ rọba n'oge nchekwa na njem, yana iji mee ka ntụ rọba na-asọfe (ịtụfu ihe na akpa akwụkwọ ma ọ bụ tankị ụgbọala)
Ọrụ nkeRDP:
*Ntụ ntụ latex a na-agbanwe agbanwe na-emepụta ihe nkiri mgbe a gbasasịrị ya ma na-eje ozi dị ka ihe nke abụọ iji mee ka ike ya dịkwuo elu;
* Sistemụ ngwa agha ahụ na-amịkọrọ colloid nchebe ahụ (mmiri agaghị emebi ya mgbe e mechara ihe nkiri ahụ, ma ọ bụ "mgbasa nke abụọ":
* A na-ekesa resin polima nke na-akpụ ihe nkiri dị ka ihe na-eme ka ihe sie ike n'ofe sistemụ ngwa agha ahụ dum, si otú a na-eme ka njikọ nke ngwa agha ahụ dịkwuo elu:
Arụmọrụ ngwaahịa:
A na-eji ude polima eme ntụ ntụ latex nke a na-akpọ redispersible site na iji mmiri kpọnwụọ. Mgbe agwakọtara ya na mmiri n'ime ite, a na-eme ka ọ gbazee ma gbasaa ya n'ime mmiri iji mepụta ude polima kwụsiri ike ọzọ. Mgbe emechara ka ntụ latex nke a na-akpọ redispersible pụta ma gbasaa na mmiri, mmiri ahụ na-apụ n'anya, na-emepụta ihe nkiri polima n'ime ite ahụ iji melite arụmọrụ nke ite ahụ. Ntụ ntụ latex dị iche iche nke a na-akpọ redispersible nwere mmetụta dị iche iche na ite ntụ akọrọ. Site n'ime ka iguzogide mmetụta, ogologo oge, na iguzogide iyi nke ite ahụ dịkwuo mma, ihe ndị na-eme ka ntụ ntụ ahụ na-ejupụta oghere nke ite ahụ, na-eme ka ọ dị obere ma na-eme ka iguzogide iyi ya ka mma. N'okpuru ọrụ nke ike mpụga, ọ ga-emepụta ezumike na-enweghị mmebi. Ihe nkiri gluu nwere ike ịdịgide na sistemụ ite ahụ. Imeziwanye ọrụ nke owuwu ite ahụ.
Enwere mmetụta na-eme ka mmanụ dị n'etiti ihe ndị dị na ntụ ntụ polima, na-enye ohere ka ihe ndị dị na moto ahụ na-asọpụta n'onwe ha, ebe ntụ ntụ ahụ na-eme ka ikuku dị ọkụ, pna-eme ka ngwa agha ahụ sie ike ma na-eme ka ọ rụọ ọrụ nke ọma n'oge a na-arụ ya. Na-eme ka ike njikọ na njikọta nke ngwa agha ahụ dịkwuo mma.
Mgbe e sere ya ihe nkiri nantụ ntụ latex a na-emegharị emegharịDịka ihe e ji ejikọta ihe ndị dị ndụ, ọ nwere ike ịmepụta ike nrụgide dị elu na ike nrapado n'elu ihe ndị dị iche iche. Ọ na-arụ ọrụ dị mkpa na nrapado dị n'etiti ihe e ji agwakọta ihe na ihe ndị dị ndụ (EPS, bọọdụ ụfụfụ a gbapụrụ agbapụ) na ihe ndị dị n'elu ala dị larịị. A na-ekesa ntụ ntụ ihe na-eme ka ihe nkiri ahụ sie ike dị ka ihe na-eme ka ihe sie ike n'ofe sistemụ ihe mkpuchi ahụ dum, na-eme ka njikọ nke ihe mkpuchi ahụ dịkwuo elu. Iji melite iguzogide ihu igwe, iguzogide oyi na ịgbaze, na igbochi mgbawa ihe mkpuchi ahụ, ntụ ntụ latex a na-agbagharị agbagharị bụ nke resin thermoplastic, nke nwere ezigbo mgbanwe ma nwee ike ime ka ihe mkpuchi ahụ gbanwee na mgbanwe gburugburu ebe oyi na ọkụ, na-egbochi mgbawa ihe mkpuchi ahụ nke ọma n'ihi ọdịiche okpomọkụ. Site n'imeziwanye hydrophobicity nke ihe mkpuchi ahụ na ibelata nnabata mmiri, enwere ike ịgbasa ntụ ntụ latex iji mepụta ihe nkiri na oghere na elu nke ihe mkpuchi ahụ. Agaghị agbasa ihe nkiri ihe mkpuchi polymer ahụ mgbe ọ zutere mmiri, na-egbochi mwakpo nke mmiri ma na-eme ka ọ ghara ịgbapụ agbapụ. Ntụ ntụ latex pụrụ iche a na-agbagharị agbagharị nwere mmetụta hydrophobic nwere mmetụta hydrophobic ka mma. Imeziwanye ike ịgbagọ na ike flexural nke ihe mkpuchi ahụ.
Ngwa ngwaahịa:
Sistemụ mkpuchi mgbidi mpụga:
Ngwakọta ihe: Hụ na ngwa ahịa ahụ rapara na mgbidi ahụ nke ọma na bọọdụ EPS. Mee ka ike njikọ ahụ ka mma.
Ngwa agha plasta: Hụ na ike igwe, ike mgbawa, ike siri ike, na ike iguzogide mmetụta nke sistemụ mkpuchi.
Ihe mkpuchi nkwonkwo: Enweghị ike ikpuchi ngwa agha ruogbochie mbanye mmiriN'otu oge ahụ, ọ na-arapara nke ọma n'akụkụ taịlị seramiiki, obere ọsọ mbelata, na mgbanwe.
Ndozigharị taịlị na ihe e ji tee osisi: Meziwanye ike njikọ na njikọ nke putty na ihe ndị pụrụ iche (dịka taịlị seramiiki, mosaics, plywood, na ihe ndị ọzọ dị ire ụtọ), na-eme ka putty nwee ike ịgbanwe agbanwe iji gbochie mmụba nke ihe ndị ahụ.
Mkpụkpọ nkume na ihe e ji eme plastering: Meziwanye nchekwa mmiri. Belata mmiri na-efu na ihe ndị nwere oghere dị n'ime ya.
Ngwa agha mmiri nke e ji simenti mee:Hụ na mkpuchi moto ahụ na-arụ ọrụ mmiri mmiri, ma nweekwa ezigbo njikọta na elu ntọala ahụ, ma melite ike nrụgide na mgbanwe nke moto ahụ.
Ngwa agha ala nke na-eme ka onwe ya dị larịị:Hụ na modulus na-agbanwe agbanwe nke ụrọ ahụ dabara, tinyekwara iguzogide mgbagọ na mgbawa ya. Meziwanye iguzogide iyi, ike njikọ, na njikọ nke ụrọ ahụ.
Ngwa agha njikọ:Meziwanye ike elu nke ihe mkpuchi ahụ ma hụ na ike njikọ nke ihe mkpuchi ahụ dị.
Putty mgbidi dị n'ime na n'èzí:Meziwanye ike njikọ nke putty ma hụ na o nwere ike ịgbanwe agbanwe iji belata nrụgide mgbasa na mkpụkọ dị iche iche nke akwa ntọala dị iche iche na-akpata.Hụ na putty ahụ nwere ezigbo iguzogide ịka nká, enweghị ike ịbanye mmiri n'ime ya, yana iguzogide mmiri.
Ndozi ngwa agha:Hụ na ihe mejupụtara ihe owuwu ahụ kwekọrọ na ihe mejupụtara ihe owuwu ahụ, ma belata modulus na-agbanwe agbanwe nke ihe owuwu ahụ. Hụ na ihe owuwu ahụ nwere oke hydrophobicity, ike iku ume, na ike njikọ.
Ihe na-eme ka taịlị na ihe na-eme ka ihe dị n'ime ya sie ike:Ihe na-arapara taịlị: na-enye njikọ siri ike maka ngwa agha, na-enye mgbanwe zuru oke iji gbochie oke mgbasa okpomọkụ dị iche iche nke substrate na taịlị seramiiki. Melite ọrụ owuwu dị mfe ma melite arụmọrụ ọrụ
Oge ozi: Ọktoba-08-2023