Cov txheej txheem:

Dab tsi yog lub thawv yas ua los ntawm?
Dab tsi yog lub thawv yas ua los ntawm?

Video: Dab tsi yog lub thawv yas ua los ntawm?

Video: Dab tsi yog lub thawv yas ua los ntawm?
Video: 2/23/22. Poj Nplog Yug Tau Me Nyuam Txawv Heev/Meskas Muab Russia Kaw Ib Puas Tsav Yam/Hmong News. 2024, Kaum ib hlis
Anonim

Feem ntau, cov lub raj mis yas siv los tuav cov dej haus thiab lwm yam dej haus ua los ntawm polyethylene terephthalate (PET), vim tias cov khoom muaj zog thiab lub teeb.

Hauv qhov no, lub thawv yas ua li cas?

Kev txhaj tshuaj molding yog siv los tsim lub qhov ncauj dav ntim xws li yas jars, tubs, thiab vials. Cov ntaub ntawv yog txhaj rau hauv ib kab noj hniav uas muaj zog quab yuam kom ua raws li lub cev pwm. Cov no cov thawv yas yog tom qab ntawd ua tsis muaj seem.

Tsis tas li ntawd, dab tsi yog cov khoom tseem ceeb hauv cov yas? Lub sij hawm yas ” suav nrog cov ntaub ntawv uas muaj ntau yam xws li carbon, hydrogen, oxygen, nitrogen, chlorine, thiab sulfur. Cov yas Feem ntau muaj qhov hnyav molecular, txhais tau tias txhua lub molecule tuaj yeem muaj ntau txhiab atoms ua ke.

Xav txog qhov no, cov thawv ntim khoom yas yog dab tsi?

Raws li Phau Ntawv Qhia Green, lub vev xaib thiab cov ntawv xov xwm mob siab rau kev ua neej nyob ntsuab thiab muaj los ntawm National Geographic Society, kev nyab xeeb tshaj plaws yas rau rov siv hauv khaws cia cov zaub mov yog ua los ntawm high-density polyethylene (HDPE, los yog yas #2), low-density polyethylene (LDPE, los yog yas #4) thiab polypropylene (PP, los yog

Dab tsi yog 7 hom yas?

Ua kom tiav, muaj 7 hom yas muaj nyob hauv peb cov niaj hnub nim no:

  • 1 - Polyethylene Terephthalate (PET lossis PETE lossis Polyester)
  • 2 - High-density Polyethylene (HDPE)
  • 3 - Polyvinyl Chloride (PVC)
  • 4 - Tsawg-Density Polyethylene (LDPE)
  • 5 - Polypropylene (PP)
  • 6-Polystyrene (PS)
  • 7 – Lwm yam.

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