Ukwakhiwa Kwe-EVA Foam Yezinto Zokusetshenziswa Ezingavuthiwe kanye Nokuhlaziywa Kwezinqubo Ezine

Ukwakhiwa Kwe-EVA Foam Yezinto Zokusetshenziswa Ezingavuthiwe kanye Nokuhlaziywa Kwezinqubo Ezine
I-EVA, i-ethylene vinyl acetate copolymer, izinto ze-polymer. I-midsole ye-EVA ilula futhi inezakhiwo ezinhle zomzimba, iyizicathulo ezindala ezilula, izicathulo zezemidlalo, izicathulo ezivamile ezisebenzisa inani elikhulu lezinto zokwakha. Namuhla, sizofunda ukufunda ukwakheka kwe-foam ye-EVA yezinto zokusetshenziswa kanye nezinqubo ezine.

A. Ukwakheka kwe-foam ye-EVA yalezo zinto

Ukwakheka kwe-foam ye-EVA ngokuvamile kuqukethe izinto zokusetshenziswa ezilandelayo: izinto eziyinhloko, ukugcwalisa, i-ejenti ye-foam, i-ejenti yokubopha, i-ejenti ye-foam, i-lubridging.

Izinto eziyinhloko, okuyi-EVA noma i-PE. Vele, ukuze uthuthukise izakhiwo zomzimba zomkhiqizo, ungangeza nezinye izinto, njengerabha, i-POE (i-polyethylene octene co-elastomer), njll., kodwa futhi ungangeza ne-TPR encane (inhlanganisela yezakhiwo zerabha kanye ne-thermoplastic zezinto) ukuqinisa izakhiwo ezithile zomzimba.

I-EVA, inkomba eyinhloko okuqukethwe yi-VA, isinqumo sayo esiphezulu nesiphansi cishe konke ukusebenza kwemikhiqizo ye-foam ye-EVA kuhlobene ngqo. Yiqiniso ukuthi eminye i-PE ingafakwa futhi i-foam. Ngokuqondile nokuthi yini eyinhloko noma kuncike ezidingweni zomkhiqizo.

I-Filler, okwamanje i-calcium carbonate noma i-talcum powder ivame ukusetshenziswa. Isetshenziselwa ukunciphisa izindleko, ukwandisa ukuqina komkhiqizo, njll., kodwa futhi ingadlala indima ekuqhutshweni kokushisa. Ngokuvamile ubukhulu bosayizi wezinhlayiya njengesibonakaliso sekhwalithi (vele, okuqukethwe kwamanzi nakho kuyisici), isibonelo, i-mesh engu-120, i-mesh engu-400, njll. Ngokomthetho, uma inciphile, kungcono, vele, intengo nayo izoba phezulu. Inani eliphakeme kakhulu ku-recipe ngiyibonile i-40Phr (inani liyiphesenti lezinto eziyinhloko).

I-ejenti ye-foam, evame ukusetshenziswa uchungechunge lwe-AC lwe-ejenti ye-foam, njenge-AC-3000H, uchungechunge lwe-AC lwe-ejenti ye-foam lungolwe-ejenti ye-foam yokushisa okuphezulu, izinga lokushisa lokubola lingaphezu kwama-degrees angu-220.

Kukhona futhi i-ejenti yokufutha enokushisa okuphansi, njenge-AD-300, izinga lokushisa lokubola kuma-degrees angu-140, kanye ne-ejenti yokufutha enokushisa okuphakathi. Ngoba umehluko wentengo awukhulu, futhi i-ejenti yokufutha enokushisa okuphezulu izozinza, ngakho-ke manje ama-EVA amaningi amadala ashintshela ekushiseni okuphezulu, kodwa futhi nokusetshenziswa kwesilinganiso se-AC, kuye ngokuthi yisiphi isiphindaphindi esithile.

I-ejenti yokuhlanganisa esetshenziswa kakhulu manje yi-DCP (di-sec-octyl phthalate), eyayisetshenziswa ngaphambilini i-TAIC, i-PL400, njll. I-half-life ye-DCP ingumzuzu owodwa kuma-degree Celsius angu-180 kanye nemizuzu eyi-10 kuma-degree Celsius angu-130, ngakho-ke ngokuvamile, lapho uzijwayeza izinto, izinga lokushisa kufanele lilawulwe ngaphansi kwama-degree Celsius angu-120.

Eminye imikhiqizo edinga iphunga ingasebenzisa enye i-bridging agent, i-BIPB, evame ukusetshenziswa kanye ne-TAIC. Umthamo we-DCP u-0.5-0.6Phr we-flat foam kanye ne-in-mold small foam, kanye no-0.8-1.0Phr we-injection foam, kodwa kukhona nomehluko ekusetshenzisweni.

Kunezinhlobo ezimbili zezisheshisi ze-foam, i-zinc oxide powder kanye ne-zinc stearate powder, ezisetshenziswa kakhulu kulezi zinsuku. Besivame ukusebenzisa lezi ezimbili ndawonye lapha, kodwa manje sisebenzisa i-zinc oxide kuphela. Uhlobo olulodwa lungaphinde lufeze umphumela, futhi ukuzinza komkhiqizo nakho kungaba ngcono. I-Zinc oxide yehlisa izinga lokushisa lokubola kwe-AC libe cishe ama-degrees angu-160, okwenza kube lula ukukhiqizwa. Sinesivumelwano lapha, inani elijwayelekile le-zinc oxide alidluli ku-0.2Phr, futhi ukuncipha komkhiqizo kakhulu kuzoba kukhulu. Vele, uma kuncane kakhulu, ijubane lokugqwala lihamba kancane kakhulu, ngakho-ke kungcono ukungabi ngaphansi kwe-1.0hr/.

I-lubricant ivame ukuba yi-stearic acid. Eqinisweni, ayinawo umphumela omkhulu, ukuvumela izinto zokuzijwayeza, hhayi umshini onamathelayo. Akukuhle ukusebenzisa okwengeziwe, ngoba kunganciphisa ukungqubuzana phakathi kwamaphuzu, ukuze iningi lezakhiwo zomzimba lincishiswe futhi kunconywe i-0.5Phr.

B. Mayelana Nenqubo

Ngokuvamile i-foam ye-EVA inezinqubo ezine, i-foam enkulu eyisicaba yendabuko, i-foam encane esikhumbeni, umjovo kanye ne-foam ebaluleke kakhulu.

1. Inqubo yokujova

Le nqubo iyinto eyinhloko yesikhathi esizayo, inqubo engaphandle komkhiqizo, kodwa ukunemba kwesikhunta kuphakeme. Isimiso sifana nokubumba komjovo embonini yepulasitiki, kodwa ukubumba komjovo kuvula isikhunta ngokushesha, futhi izinga lokushisa lesikhunta lihlukile, okungukuthi, izinga lokushisa lesikhunta somjovo we-EVA kanye nesikhathi sokuvula isikhunta kulungisiwe kancane. Manje izicathulo zezemidlalo ezaziwayo eziningi zohlobo lomzimba sezishintshile ngenxa yale ndlela. Ezinye izindlela ngaphandle kwayo, ukusebenza kahle kuqhele ngamakhilomitha ayisigidi.

2. Igwebu Elikhulu Eliyisicaba Lendabuko

Kulezi zinsuku, amafektri amancane ngokuvamile asebenzisa lolu hlobo, futhi izindleko zemishini nemishini ziphansi kakhulu. Le nqubo yenziwa ngamashidi, bese kwenziwa imikhiqizo ngenqubo yokubhoboza, ukugaya njalo njalo. Izimo zokukhipha igwebu aziguquki, izinga lokushisa lingu-160-170, isikhathi sinqunywa ubukhulu besikhunta, ngokuvamile imizuzwana engu-90-110 / MM, ingcindezi ingu-150KG / square CM.

3. I-Foam encane esikhumbeni

Le nqubo isetshenziswa kakhulu ezintweni zezicathulo, izicathulo zezemidlalo ukwenza igwebu lokuqala le-midsole yesibili. Izinto ziyagoqwa ngokwefomula, zikalwe bese zifakwa esikhumbeni esivulekile, bese igwebu liphuma njengokubukeka okuvamile kwesicathulo.

Ubunzima bale nqubo ukulingana kwesikhunta kanye neresiphi; ngaphandle kwalokho kunzima ukulawula ubuningi kanye nobunzima ngesikhathi esisodwa. Ngokuvamile usayizi uyafaneleka kodwa ubulukhuni abwanele, kanti ubulukhuni buyanele kodwa usayizi mncane.

Izimo zokukhipha amagwebu zale nqubo ziguquguquka kakhulu, kuye ngesakhiwo somumo womkhiqizo, vele, isikhathi ikakhulukazi ushintsho, kanti ushintsho lokushisa aluningi.

Ngaphambilini, sikhulume nge-midsole yesibili, futhi lapha sethula ukubumbana kwesibili. I-embryo erhabaxa ye-foam yangaphambilini iyagaywa esikhumbeni bese icindezelwa ku-mold eqediwe, bese umkhiqizo wakhiwa ngokushisa nokupholisa ngezinyathelo ezimbili.

Izinga lokushisa lokushisa elingu-125-135 lifaneleka kakhulu, ingcindezi ingu-50KG / CM yesikwele, ifudumeza isikhathi esithile bese ipholiswa ngamanzi, ikhiphe i-midsole yesibili. Lokhu kucindezelwa kusayizi wephansi kuzinzile kakhudlwana, izakhiwo zomzimba zingcono kakhulu.

4. Ukukhipha Igwebu Okungabalulekile

Uchungechunge lwama-molecule e-EVA luqondile, ngakho-ke enkambisweni yokwenza amagwebu ngokuvamile kudingeka kufakwe i-ejenti yokuxhumanisa evundlile, ngesakhiwo sokuxhumanisa esivundlile ukuze kukhiywe igesi. Ngakho-ke, ukwenza amagwebu okubaluleke kakhulu kwe-EVA kuzodingeka kuxazululwe inkinga yokuthi igesi ikhiywe kanjani.

Kusukela ezincwadini zelungelo lobunikazi kanye nolunye ulwazi lwenkampani, inqubo ye-EVA supercritical foam iyindlela enjalo: ukuxubana okuqinile ngemva kokuxhumanisa, ukuhlanganisa, ukubumba ukuze kutholakale amathe alungisiwe, amathe angene kudivayisi ye-autoclave foam, i-ejenti ye-foam ebonakalayo ingene eketheni, kusetshenziswa indlela yokunciphisa ingcindezi ukuze kutholakale izinto zethe ye-foam ezinezimbobo ezincane.

Izinguquko zesimo sezinto ze-EVA: i-granulation – i-injection / i-injection molding – i-foam – amathe.

Inqubo enjalo yokwenza amagwebu ingaqondwa kalula njengenqubo yokubumba igwebu, i-chemical blowing agent ibe yi-physical blowing agent, kanye nokusebenza okusheshayo kokunciphisa ingcindezi, ungathola ama-supercritical foam EVA soles. Uma ufuna yonke inqubo ibe nobungane nemvelo futhi ihlanzeke, inqubo yangaphambilini yokuhlanganisa amagwebu ingashintshwa ngendlela yokuhlanganisa amagwebu njenge-radiation cross linking.

Inqubo yokwenza amagwebu e-Supercritical isithuthuke kakhulu eminyakeni emibili edlule, imishini, ubuchwepheshe bube ngcono kakhulu, okulawula ukwakheka, inqubo, ukuze ukusebenza kwayo okuhle kakhulu kanye nokulawula kunciphe futhi izindleko kuyisihluthulelo.