Zeziphi izinto ezigqiba umgangatho wengxowa ye-Eva?

Zeziphi izinto ezigqiba umgangatho wengxowa ye-Eva?

Njengempahla yokupakisha eqhelekileyo, umgangatho weIingxowa ze-EVAuchatshazelwa zizinto ezininzi. Nazi ezinye izinto eziphambili ezimisela ngokudibeneyo umgangatho kunye nokusebenza kweengxowa ze-EVA:

1. Ukwakhiwa kwezinto
Umgangatho weengxowa ze-EVA kuxhomekeke kuqala ekubunjweni kwayo kwezinto eziphathekayo, ngokukodwa umxholo we-ethylene-vinyl acetate (VA). I-EVA yinto eyenziwa yi-copolymerization ye-ethylene kunye ne-vinyl acetate, kwaye umxholo we-VA uphakathi kwe-5% kunye ne-40%. Isixa se-VA sichaphazela ngokuthe ngqo ukusebenza kweengxowa ze-EVA, ezifana nokuguquguquka, ukuchasana kwempembelelo, ukungafihli, njl.

2. Ubume bemolekyuli
Ulwakhiwo lwemolekyuli ye-Eva nayo inempembelelo ebalulekileyo kumgangatho. Emva kokuqaliswa kwe-vinyl acetate monomer kwikhonkco ye-molecular EVA, i-crystallinity ephezulu iyancitshiswa kwaye ukuqina kunye nokuchasana kwempembelelo kuphuculwe. Ke ngoko, uyilo lwemolekyuli yeengxowa ze-EVA lubalulekile ekusebenzeni kwazo.

3. Inkqubo yokuvelisa
Inkqubo yokuveliswa kweengxowa ze-EVA nayo yinto ebalulekileyo. Uninzi lweenkampani zisebenzisa iinkqubo zepolymerization ezininzi zoxinzelelo oluphezulu, kubandakanya indlela yeketile kunye ne-tubular method. Ukwahluka kwezi nkqubo kuya kubangela ukungafani ekusebenzeni kweemveliso ze-EVA, ezifana nokuxhathisa ukothuka kunye nokuguga.

4. Ukulungiswa kunye nokubumba
I-EVA yipolymer ye-thermoplastic enokuthi isetyenziselwe iindlela ezahlukeneyo zokusetyenzwa kunye neenkqubo zokubumba ezifana nokubumba inaliti, ukubunjwa kwe-extrusion, kunye nokubumba ukuvuthela. Ukubumba kwe-EVA kunobushushu obuphantsi bokucwangcisa (160-200 ℃), uluhlu olubanzi, kunye nobushushu obuphantsi bokubumba (20-45℃). Ezi meko zokucubungula ziya kuchaphazela umgangatho wokugqibela wesikhwama se-EVA.

5. Ubuninzi kunye nobunzima
Ubuninzi bengxowa ye-EVA buqhele ukuba phakathi kwe-0.9-0.95 g/cm³, kwaye ukuqina kudla ngokuvavanywa kusetyenziswa ubulukhuni be-Shore A, kunye noluhlu lobunzima obuqhelekileyo lwe-30-70. Ezi parameters zokusebenza ngokomzimba zihambelana ngokuthe ngqo namandla kunye nokusebenza kwe-cushioning yesikhwama se-EVA.

6. Ukusebenza kwendalo
Iingxowa ze-EVA kufuneka zihlangabezane neemfuno zokhuseleko lokusingqongileyo, zingabi nazinto ziyingozi, kwaye zihambelane nemigangatho efanelekileyo kunye nemimiselo yokusingqongileyo. Ukusebenza kokusingqongileyo yinto yokuba abathengi banamhlanje baxhalabele ngakumbi xa bekhetha iimveliso.

7. Uyilo
Uyilo lwengxowa ye-EVA luya kuchaphazela umgangatho walo. Uyilo lubandakanya ukukhethwa kweendwangu, ubukhulu kunye nobunzima be-Eva, kunye noyilo lwesakhiwo semveliso. Uyilo oluhle lunokuphucula ukusebenza kunye nobuhle beengxowa ze-EVA.

8. Ukumelana noxinzelelo kunye nokuxhathisa ukothuka
Iingxowa ze-EVA kufuneka zibe nokumelana nokunyanzeliswa okuthile kunye nokuxhathisa ukothuka ukukhusela izinto ezipakishweyo kwimpembelelo yangaphandle kunye ne-extrusion

9. Ukumelana namanzi kunye nokumelana nokubola
Iingxowa ze-EVA ezikumgangatho ophezulu kufuneka zibe nokuxhathisa okulungileyo kwamanzi kunye nokumelana nokubola, kwaye zikwazi ukumelana nokubola kwamanzi olwandle, igrisi, iasidi, ialkali kunye nezinye iikhemikhali.

Isishwankathelo, umgangatho weengxowa ze-EVA ugqitywe ngezinto ezininzi ezifana nokubunjwa kwezinto, ukwakheka kweemolekyuli, inkqubo yokuvelisa, ukucubungula kunye nokubumba, izakhiwo zomzimba, ukusebenza kokusingqongileyo, ukuyila, ukunyanzeliswa koxinzelelo kunye nokuxhathisa ukothuka, kunye nokuchasana kwamanzi kunye nokugqwala. ukuxhathisa. Abavelisi kufuneka bathathele ingqalelo le miba ngokubanzi ukuvelisa iingxowa ze-EVA ezikumgangatho ophezulu.