Cov ntawv PP uas tsis kub hnyiab yog cov ntawv yas ua los ntawm PP resin, nrog ntau yam khoom siv ntxiv los ntawm kev rho tawm, calendering, txias, txiav thiab lwm yam txheej txheem. Cov ntawv PP uas tsis kub hnyiab yog cov khoom siv semi-crystalline. Nws nyuaj dua PE thiab muaj qhov kub siab dua. Vim tias qhov kub ntawm homopolymer PP yog qhov tawg heev saum 0C, ntau cov ntaub ntawv PP lag luam yog cov copolymers random nrog 1-4% ethylene cov ntsiab lus lossis thaiv copolymers nrog cov ntsiab lus ethylene ntau dua. Cov ntaub ntawv Copolymer PP muaj qhov kub tsis tshua muaj cua sov distortion (100 ° C), tsis tshua muaj pob tshab, tsis tshua muaj gloss, thiab tsis tshua muaj rigidity, tab sis muaj zog cuam tshuam. Yog li, yuav ua li cas txheeb xyuas qhov zoo ntawm cov ntawv PP uas tsis kub hnyiab?
1. Xyuas seb nws qhov ci ntsa iab ntawm qhov chaw. Qhov ci ntsa iab tsis zoo yog cov yas rov ua dua tshiab.
2. Saib nws qhov tawv. Cov khoom siv raw ua los ntawm cov hluav taws kub PP muaj qhov tawv zoo heev thiab tuaj yeem khoov me ntsis.
3. Tshawb xyuas qhov chaw txiav. Tom qab txiav cov yas rov ua dua tshiab, yuav muaj ntau yam khib nyiab sib txawv xim.
4. Xyuas nws qhov ceev. Qhov ceev ntawm PP polypropylene yog 0.92 ~ 0.93. Txhua yam khoom siv uas ntab saum dej yog polypropylene.
5. Daim ntawv PP uas tiv taus hluav taws kub raug cua sov thiab vuam. Pa luam yeeb tawm thaum vuam cov yas rov ua dua tshiab.
6. Kev xa hluav taws xob, cov yas rov ua dua tshiab muaj kev xa hluav taws xob tsis zoo.
7. Kev tawv, cov yas rov ua dua tshiab kuj phem dua.
8. Cov ntawv PP uas tsis kub hnyiab, muab pov rau hauv dej kom pom tias nws ntab rau ntawm dej, feem ntau ntawm cov dej rov ua dua yuav poob rau hauv qab.
Lub sijhawm tshaj tawm: Lub Ob Hlis-19-2023
