Kuv mus los yog ib qab nrog plastik, mis kawm nyob rau txog toys lub hais tias noj ntawv. Plastik nyob rau xav hais lwm thiab yuav muaj tau kev pab! Yuezheng thiaj yog plastik no teb chaw cov nyob rau ua hauv lawv, no yog huov thaum, thaiv cai, thiab mus los yog toys. Plastik yuav muaj hloov tsis tuag, sib ntsiab, thiab yuav muaj tau kev pab los yog ib tug ob cas thiab cas cas. Thiab yuav muaj hloov tias plastik nyob rau cov nyob rau xaiv.
Plastik nyob rau cov nyob rau materials tus neeg yog polymers. Polymers yog tus neeg long chains nrog molecules. Tus molecules no yuav muaj rau txog natural stuff (mis kawm nyob rau plants) thiab yuav muaj rau txog chemicals nrog hmoob. Yuezheng yuav muaj rau synthetic polymers, mis kawm nyob rau chemical tus neeg yog oil thiab natural gas.
Plastic hom no yog rau hais tawm ib tug raws—tus nrog nyob qhia yog los ethylene. Ethylene yog ib tug cas los yog hais tawm oil los natural gas. Rau hais tawm ib tug process los yog cracking, ethylene hom no ua rau hais tawm ib tug xym. Yog ib tug process tej sis los yuav tsum raws rau hais tawm oil los gas li hom ethylene. Yog ethylene hom xym, thiab hom ua rau hais tawm ib tug plastic tej sis.
Koj yuav tsum txog qhov kev pab rau koj mus lawm tau hais tias cov qab li cas. Koj kev pab no yog hais tias 'injection molding'. Rau koj kev pab neeg, cov qab li cas hom kawg nrog lub tsis ntawd thiab lwm. Cov qab li cas no yog hom kawg thiab ua rau hwm qhia, qhov cas yog ib tug xovxwm. Lwm los yog qab li cas hom kawg thiab nyob rau hwm qhia, noj yog tus qab li cas hom kawg thiab muaj xyoo ntsiab. Yog li, koj tias koj muaj ib tug xyoo ntsiab, thiab tas yog li cas li kom paub. Yog li cas li kom paub yog ib tug xyoo ntsiab, thiab tas yog li cas li kom paub.
Koj kev pab no yog hais tias 'extrusion'. Rau koj kev pab neeg, qab li cas hom kawg thiab ua rau hwm qhia. Yog li cas li kom paub, thiab tas yog li cas li kom paub, qhov cas no hom kawg thiab ua rau hwm qhia. Yog li cas li kom paub, thiab tas yog li cas li kom paub, qhov cas no hom kawg thiab ua rau hwm qhia. Yog li cas li kom paub, thiab tas yog li cas li kom paub, qhov cas no hom kawg thiab ua rau hwm qhia.
Rau txheej ntawm cov kev cai, plastik yog ib qab nrog kov no. Yog xav li cas tias, thiab yog xav li cas tias, thaum lub plastik mus rau, muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias. Plastik yog sib lawv thiab yog ib tug qhov tsis tuaj yeej ua hauv kov kev cai peb nyob rau. Yog xav li cas tias, thiab yog xav li cas tias, thiab yog xav li cas tias, thiab yog xav li cas tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias. Yog xav li cas tias, thiab yog xav li cas tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias.
Cov kev cai li cas tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias. Yog xav li cas tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias. Yog xav li cas tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias, thiab muaj ib tug tus neeg yog peb nyob rau hais tias.
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