N'ime afọ ndị na-adịbeghị anya, ọtụtụ resin roba ntụ ntụ, ike dị elu na-eguzogide mmiripolymer ntụ ntụ redispersiblena ntụ ntụ rọba ndị ọzọ dị ọnụ ala apụtala n'ahịa iji dochie emulsion ọdịnala VAE (vinyl acetate-ethylene copolymer), bụ nke a na-efesa nke a mịrị amị ma megharịa ya. Uzuzu latex na-agbasasị agbasa, yabụ kedu ihe dị iche n'etiti ntụ ntụ rọba na redispersible latex ntụ ntụ, nwere ike resin roba ntụ ntụ dochie redispersible latex ntụ ntụ?
1. Redispersible polymer powder RDP
Ka ọ dị ugbu a, polymer powders ndị a na-ejikarị eme ihe n'ụwa bụ: vinyl acetate na ethylene copolymer roba ntụ ntụ (VAC / E), ethylene na vinyl chloride na vinyl laurate terpolymer roba ntụ ntụ (E / VC / VL), acetic acid Vinyl ester na ethylene na elu fatty acid vinyl ester terpolymer roba ntụ ntụ (VAC / E / VeoVa), atọ ndị a na-ekesa polymer powders na-achịkwa ahịa dum, karịsịa vinyl acetate na ethylene copolymer roba ntụ ntụ VAC / E / VeoVa E, nwere ọnọdụ na-eduga na ụwa dum. ubi na-anọchi anya teknuzu e ji mara nke dispersible polymer powders. Ngwọta teknụzụ kachasị mma n'ihe gbasara ahụmịhe teknụzụ na polymer etinyere na mgbanwe ngwa agha:
1. Ọ bụ otu n'ime polymer ndị a na-ejikarị eme ihe n'ụwa;
2. Nwee ahụmịhe ngwa ngwa n'ọhịa ihe owuwu;
3. Ọ nwere ike izute akụrụngwa rheological chọrọ site na ngwa agha (ya bụ ọrụ achọrọ);
4. The polymer resin na ndị ọzọ monomers nwere àgwà nke ala organic volatile ogige (VOC) na ala mgbakasị gas;
5. Ọ nwere njirimara nke ezigbo nguzogide UV, ezigbo okpomọkụ na-adịgide adịgide na ogologo oge;
6. Ọ nwere nguzogide saponification dị elu;
7. Nwere ndị widest iko mgbanwe okpomọkụ nso (Tg);
8. Ọ nwere dịtụ mma keukwu bonding, mgbanwe na n'ibu Njirimara;
9. Nwee ahụmịhe kachasị ogologo na mmepụta kemịkalụ na otu esi emepụta ngwaahịa dị mma na ahụmịhe n'ịkwado nkwụsi ike nchekwa;
10. Ọ dị mfe ijikọta na colloid nchebe (polyvinyl mmanya) na arụmọrụ dị elu.
2. Resin ntụ ntụ
Ọtụtụ n'ime "resin" rọba powders na ahịa nwere kemịkal DBP. Ị nwere ike ịlele mmebi nke ihe kemịkal a, nke na-emetụta ọrụ nwoke na nwanyị. A na-akwakọba ọnụ ọgụgụ buru ibu nke ntụ ntụ rọba dị otú ahụ n'ụlọ nkwakọba ihe na ụlọ nyocha, ha na-agbanwekwa ruo n'ókè ụfọdụ. Ahịa Beijing, bụ nke a ma ama maka mmepụta nke "rọba ntụ ntụ", apụtala ugbu a ụdị "ụtụ rọba" nke a na-etinye n'ime ihe mgbaze nwere aha dị iche iche: nnukwu ike na-eguzogide mmiri na-eguzogide ọgwụ, resin adhesive powder, etc. Ụdị ihe atụ. :
1. Ogbenye dispersibility, ụfọdụ na-eche mmiri, ụfọdụ na-eche flocculent (ọ kwesịrị ịbụ a porous ihe dị ka sepiolite), na ụfọdụ ndị na-acha ọcha na ubé akọrọ ma ka na-esi ísì;
2. Na-esi ísì nke ukwuu;
3. Agbanyela ụfọdụ agba, na agba ugbu a bụ ọcha, odo, isi awọ, nwa, ọbara ọbara, wdg;
4. Ọnụ ego mgbakwunye dị ntakịrị, na mgbakwunye maka otu ton bụ 5 ~ 12 n'arọ;
5. Ike mmalite dị ịtụnanya. Simenti enweghị ike ruo ụbọchị atọ, ọ nwere ike imebi osisi mkpuchi ma rapara ya.
6. A na-ekwu na enwere ike iji bọọdụ XPS na-enweghị onye ọrụ interface.
Site na samples enwetara ugbu a, ọ nwere ike kwubie na ọ bụ ihe mgbaze dabeere resin adsorbed site fechaa porous ihe, ma soplaya chọrọ iji kpachaara anya zere okwu ahụ bụ "ihe mgbaze", ya mere a na-akpọ ya "roba ntụ ntụ"
adịghị ike:
1. Mgbochi ihu igwe nke ihe mgbaze bụ nnukwu nsogbu. Na anyanwụ, ọ ga-agbanwe n'ime obere oge. Ọbụna ma ọ bụrụ na ọ bụghị na anyanwụ, njikọ njikọ ga-agbaze ngwa ngwa n'ihi oghere oghere;
2. Nguzogide ịka nká, ihe mgbaze anaghị eguzogide okpomọkụ, onye ọ bụla maara nke a;
3. Ebe ọ bụ na usoro njikọ ahụ bụ ịgbari interface nke mkpuchi mkpuchi, n'ụzọ megidere nke ahụ, ọ na-ebibikwa njikọ njikọ. Ọ bụrụ na enwere nsogbu na ọkwa ikpeazụ, mmetụta ahụ ga-egbu;
4. Enweghị ụkpụrụ maka ngwa mba ọzọ. Site na ahụmahụ tozuru okè nke ụlọ ọrụ kemịkal bụ isi na mba ọzọ, ọ gaghị ekwe omume ịghara ịchọpụta ihe a.
nchịkọta:
Ọ dị na ntụ ntụ latex na-ekesa:
1. Ngwaahịa latex na-agbanwe agbanwe bụ ntụ ntụ na-edozi mmiri, nke bụ copolymer nke ethylene na vinyl acetate, na-eji polyvinyl mmanya dị ka colloid nchebe.
2. VAE redispersible latex ntụ ntụ nwere ihe nkiri na-emepụta ihe, 50% ngwọta mmiri na-emepụta emulsion, ọ na-emepụta ihe nkiri plastik mgbe etinyere ya na iko maka awa 24.
3. Ihe nkiri a kpụrụ akpụ nwere ụfọdụ mgbanwe na nguzogide mmiri. Nwere ike iru ụkpụrụ mba.
4. The redispersible latex ntụ ntụ nwere nnukwu arụmọrụ: ọ nwere ikike njikọ dị elu, arụmọrụ pụrụ iche na arụmọrụ mmiri na-enweghị atụ, ike njikọ dị mma, na-enye ngwa agha ahụ na nguzogide alkali dị mma, ma nwee ike melite nrapado na ike ike nke ngwa agha ahụ. , plasticity, na-eyi nguzogide na ihe owuwu, ọ nwere ike ime mgbanwe na ngwa agha mgbochi mgbawa.
Resin ntụ ntụ:
1. Resin roba ntụ ntụ bụ ụdị ọhụrụ nke modifier maka roba, resin, macromolecular polymer, ala roba ntụ ntụ na ihe ndị ọzọ.
2. Resin roba ntụ ntụ nwere izugbe anwụ ngwa ngwa, abrasion eguzogide, ogbenye dispersibility, ụfọdụ na-eche flocculent (ọ kwesịrị a porous ihe dị ka sepiolite), na ọcha ntụ ntụ (ma nwere pungent isi yiri kerosene) ).
3. Ụfọdụ resin powders na-emebi emebi na osisi, na mkpuchi mmiri adịghị mma.
4. Mgbochi ihu igwe na nguzogide mmiri nke resin roba ntụ ntụ dị ala karịa nke latex ntụ ntụ. Iguzogide ihu igwe bụ nnukwu nsogbu. Na anyanwụ, ọ ga-agbanwe n'ime obere oge. Ọbụna ma ọ bụrụ na ọ bụghị na anyanwụ, na bonding interface, Ebe ọ bụ na a oghere ewu, ọ ga-decompose ngwa ngwa.
5. Resin roba ntụ ntụ enweghị moldability, ma ọ bụ mgbanwe. Dị ka ọkọlọtọ nlele nke mkpuchi mkpuchi mpụga maka mgbidi dị n'èzí, naanị ọnụ ọgụgụ mbibi nke osisi polystyrene na-ezute ọkọlọtọ. Ihe ngosi ndị ọzọ erughị ọkọlọtọ.
6. Resin gluu ntụ ntụ nwere ike iji naanị maka ijikọ mbadamba polystyrene, ọ bụghị maka njikọta nke beads vitrified na mbadamba ọkụ.
Oge nzipu: Ọktoba 26-2022