Kev txheeb xyuas txoj kev ntawm cov khoom yas

Kev paub txog kev xav

1. Saib

Ua ntej saib cov xim thiab pob tshab ntawm cov khoom.

Cov khoom pob tshab yog: polystyrene thiab plexiglass.

Translucent khoom yog: tsawg ntom polyethylene, cellulosic plastics, polyvinyl chloride, polypropylene, epoxy resin, unsaturated resin.

Cov khoom lag luam opaque yog: high-density polyethylene, polyurethane thiab ntau yam xim yas.

2. Mloog

Thaum ntaus nrog ib qho khoom nyuaj, lub suab sib txawv, polystyrene zoo li lub suab hlau, thiab plexiglass muaj lub suab nrov thiab duller.

3. Kov

Yog tias cov khoom xav tias waxy thaum kov ntawm tes, nws yuav tsum yog cov khoom siv polyolefin. Qhov thib ob, qhov degree ntawm softness thiab hardness ntawm pwm tuaj yeem yooj yim qhia raws li hauv qab no:

Hard → Mos

Polystyrene → polypropylene → polyamide → plexiglass → siab ceev polyethylene → PVC → tsis tshua muaj ntom polyethylene → mos PVC

Tom qab ntawd sim qhov hardness saum npoo, khawb qhov chaw nrog cov cwj mem sib txawv, koj tuaj yeem ua qhov txawv:

Polyethylene yas kab cim tuaj yeem kos nrog HB mem hluav;

Polypropylene yas kab cim tuaj yeem kos nrog ZH mem hluav.

Vim muaj qhov sib txawv ntawm tib neeg lub cev lub cev, cov kev xav tau los ntawm kev paub txog kev hnov ​​​​lus tsis zoo ib yam, yog li txoj kev no tsuas yog siv rau kev siv xwb.