PP (polypropylene) yog cov khoom tseem ceeb rau cov hnab ntim khoom. Feem ntau, fiber ntau -qib PP raug xaiv, nrog rau cov khoom me me thiab cov tshuaj antioxidants ntxiv los txhim kho nws cov kev ua tau zoo. Cov khoom no muaj lub zog siab thiab tshuaj lom neeg, ua rau nws haum rau ntau hom hnab woven. Dhau li ntawm kev siv cov ntaub ntawv nkauj xwb polypropylene, qee cov tuam txhab lag luam kuj siv cov ntaub ntawv siv los ua cov hnab ntim khoom. Cov khoom siv rov ua dua feem ntau yog ntxuav, crushed, melted, thiab ces reprocessed rau hauv woven hnab. Qhov kev xyaum no tsis tsuas yog txuag cov peev txheej xwb tab sis kuj txo cov pa phem ib puag ncig.
Thaum xaiv cov ntaub ntawv polypropylene, cov tuam ntxhab feem ntau txiav txim siab qhov feem pua ntawm cov fillers thiab antioxidants raws li qhov xav tau ntawm kev siv ib puag ncig thiab cov kev xav tau ntawm cov hnab ntim khoom. Piv txwv li, thaum ua cov hnab woven sab nraum zoov, qhov kev faib ua feem ntawm cov tshuaj antioxidants yuav nce ntxiv los txhim kho lawv txoj kev laus; thaum thaum ua cov hnab ntim khoom uas yuav tsum tau muaj tshuaj tiv thaiv, qhov feem ntawm cov fillers yuav nce ntxiv los txhim kho lawv cov tshuaj tiv thaiv. Qhov piv ntawm fillers thiab antioxidants yog kho raws li qhov tshwj xeeb daim ntawv thov scenario kom tau raws li qhov xav tau ntawm cov neeg siv khoom sib txawv.
Qhov kev faib ua feem ntawm cov khoom siv rov siv dua kuj nyob ntawm qhov zoo thiab kev ua haujlwm ntawm cov khoom siv raw. Feem ntau, qhov kev faib ua feem ntawm cov khoom siv rov qab tsis yog siab heev, feem ntau ntawm 20% thiab 50%. Yog tias cov khoom siv raw khoom zoo zoo, qhov kev faib ua feem ntawm cov khoom siv rov ua dua tuaj yeem nce qhov tsim nyog, tab sis yog tias cov khoom siv raw khoom tsis zoo, qhov kev faib ua feem ntawm cov khoom siv rov ua dua yuav tsum raug txo kom ntseeg tau tias kev ua haujlwm ntawm lub hnab ntim khoom.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias txawm tias siv cov khoom siv nkauj xwb lossis cov khoom siv rov ua dua tshiab, cov tuam txhab tsim khoom nruj me ntsis tswj cov khoom zoo kom ntseeg tau tias kev ua tau zoo thiab kev nyab xeeb ntawm cov khoom kawg. Tsis tas li ntawd, siv cov khoom siv rov ua dua los ua cov hnab ntim khoom kuj tseem pab txhawb kev txhim kho kom ruaj khov thiab txo qhov cuam tshuam ib puag ncig.