|
Yam ntxwv |
PP (polypropylene) |
PE (Polyethylene) |
PC (Polycarbonate) |
|
Qhov ceev (g / cm³) |
Kwv yees li 0.89-0.92, lub teeb tshaj plaws |
0.91-0.96 (vim los ntawm hom) |
Kwv yees li 1.2, kuj hnyav |
|
Thaum tshav kub kub Resistance |
Zoo, nrog rau qhov kev pabcuam txuas ntxiv ntawm kwv yees li 110-120℃thiab melting point ntawm ~ 160 degree | pluag; LDPE muaj qhov ntsuas kub tsis tu ncua ntawm kwv yees li 60-80 degree, thaum HDPE muaj qhov kub thiab txias dua. |
Zoo heev; cov iav hloov pauv kub yog ~ 150 degree, nrog rau luv dua - lub sij hawm tshav kub tsis kam. |
|
Tsawg kub tsis kam / brittleness |
pluag; Nws yooj yim rau nkig tawg ntawm qhov kub thiab txias. |
Zoo heev; tuaj yeem tiv taus qhov kub thiab txias li ntawm -70 txog -100 degree. |
Zoo; tuav zoo cuam tshuam lub zog ntawm qhov kub thiab txias. |
|
Rigidity / Hardness |
Nruab nrab, superior rau PE |
Tsawg, kuj hloov tau |
Siab, nrog zoo heev mechanical zog |
| Pob tshab |
Translucent |
Translucent rau opaque (LDPE yog translucent, thaum HDPE yog opaque) |
Zoo heev, nrog lub teeb xa mus txog li 90% |
|
Impact zog |
General |
Zoo (tshwj xeeb tshaj yog HDPE) |
Exceptional zoo heev; nws yog cov khoom siv hauv cov iav mos mos. |
|
Tshuaj Stability |
Resistant mus rau feem ntau cov tshuaj, tshwj xeeb tshaj yog acids thiab alkalis. |
Resistant rau feem ntau cov acids thiab alkalis. |
Ncaj ncees; huab cua- tiv taus tab sis tsis zoo rau qee yam tshuaj thiab hydrolysis. |
|
Cov yam ntxwv ua |
Zoo fluidity, nrog ib tug kuj siab shrinkage tus nqi. |
Kev ua tau zoo, tab sis lub zog yaj yuav yog qhov tsawg. |
Yuav tsum tau kub siab (siab tshaj 300 degree) thiab kom qhuav, nrog rau kev ua haujlwm siab. |
|
Nqi |
Tsawg |
Tsawg tshaj plaws (tus nqi raw khoom feem ntau qis dua PP) |
Siab (tus nqi raw khoom yog li 2-3 npaug ntawm PP lossis siab dua) |
Zuag qhia tag nrho, yog tias koj tab tom nrhiav cov nqi sib tw -kev ua tau zoo thiab ntau yam, PP yog qhov kev xaiv txhim khu kev qha; Yog tias koj tom qab qhov kawg ntawm qhov toughness thiab qis -kub tsis kam, PE muaj qhov zoo dua; yog tias koj xav tau sab saum toj -tier lub zog, pob tshab, thiab kub tsis kam nrog cov peev nyiaj txaus, PC yog cov lus qhia meej.