Yintoni umahluko phakathi kwePVC kunye ne-EVA?

Ngokukhula ngokuthe ngcembe kwala maxesha, ubomi babantu buye batshintsha kakhulu, yaye ukusetyenziswa kwezinto ezintsha ezahlukahlukeneyo kuye kwanda ngakumbi nangakumbi. Umzekelo, iPVC kunyeEVAizinto ezisetyenziswa kakhulu kubomi banamhlanje, kodwa abantu abaninzi lula ukubhidanisa kubo. . Emva koko, masiqonde umahluko phakathi kwePVC kunye ne-EVA.

1. Imbonakalo eyahlukileyo kunye nokwakheka:
I-PVC kwilizwe laseTshayina inokwahlulwa ibe ziindidi ezimbini: ezinetyhefu ephantsi kwaye zinobuhlobo nokusingqongileyo kwaye aziyongozi kwaye zinobuhlobo nokusingqongileyo. Iimathiriyeli ze-EVA zonke zizixhobo ezihambelana nokusingqongileyo. Umphezulu we-Eva uthambile; ukuqina kwayo komelele kunoko kwePVC, kwaye ivakala incangathi (kodwa akukho glu kumphezulu); imhlophe kwaye iyabonakala, kwaye i-transparent High, ukuvakalelwa kunye nokuvakalelwa kufana kakhulu nefilimu ye-PVC, ngoko kufuneka kuhlawulwe ingqalelo ukuze bahlule.

2. Iinkqubo ezahlukeneyo:
I-PVC yintlaka ye-thermoplastic eyenziwe nge-vinyl chloride phantsi kwesenzo somqalisi. Yihomopolymer yevinyl chloride. I-Vinyl chloride homopolymer kunye ne-vinyl chloride copolymer zihlangene zibizwa ngokuba yi-vinyl chloride resin. I-PVC yayikhe yaba yeyona plastiki yaveliswa ngokubanzi-injongo yehlabathi kwaye yayisetyenziswa ngokubanzi. I-molecular formula ye-EVA (i-ethylene vinyl acetate copolymer) yi-C6H10O2 kunye nobunzima bayo be-molecular yi-114.1424. Esi sixhobo sisetyenziswa njengeefilimu ezahlukeneyo, iimveliso ze-foam, i-adhesives eshushu enyibilikayo kunye ne-polymer modifiers.

3. Ukuthamba okwahlukeneyo kunye nobunzima: Umbala wendalo wePVC utyheli kancinane, uguquguquke kwaye uyabengezela. Ukucaca kungcono kune-polyethylene kunye ne-polystyrene, kodwa kubi kune-polystyrene. Ngokuxhomekeke kubungakanani bezongezo, ihlulwe ibe yi-polyvinyl chloride ethambileyo kwaye ilukhuni. Iimveliso ezithambileyo ziyabhetyebhetye kwaye ziqinile kwaye ziziva zincangathi, ngelixa iimveliso eziqinileyo zinobulukhuni obuphezulu kune polyethylene ephantsi. , kwaye ngaphantsi kune-polypropylene, ukumhlophe kuya kwenzeka kwindawo yokuguqula. I-EVA (i-ethylene vinyl acetate copolymer) ithambile kune-PVC.

4. Amaxabiso ahlukile:
Izinto zePVC: Ixabiso ngetoni nganye liphakathi kwe-6,000 kunye ne-7,000 yeyuan. Izinto ze-EVA zinobunzima obuhlukeneyo kunye namaxabiso. Ixabiso li malunga ne-2,000 / cubic meter.

5. Iimpawu ezahlukeneyo:
I-PVC ineempawu ezilungileyo zokugquma umbane, inokusetyenziswa njengezinto ezisezantsi zokugquma, kunye nokuzinza kwayo kweekhemikhali kukwalungile. Ngenxa yokungazinzi kakuhle kwe-thermal ye-polyvinyl chloride, ukufudumeza kwexesha elide kuya kubangela ukubola, ukukhululwa kwegesi yeHCl, kunye nokuguqulwa kwe-polyvinyl chloride. Ke ngoko, uluhlu lwayo lwesicelo luncinci, kwaye ubushushu bokusetyenziswa ngokuqhelekileyo buphakathi kwe-15 kunye ne-55 degrees. I-EVA iqinile kubushushu begumbi. Xa ishushu iyanyibilika ukusa kumlinganiselo othile ize ibe lulwelo olunokuqukuqela kwaye lube ne-viscosity ethile.