
Ndi kuwonjezeka kwa chidziwitso cha chitetezo cha chilengedwe m'maiko onse padziko lapansi, malamulo ndi malamulo oteteza chilengedwe akuwongoleredwa pang'onopang'ono, makamaka zofunikira zaukhondo pazinthu zapulasitiki monga mankhwala, kukonza chakudya, zofunikira za tsiku ndi tsiku, ndi pulasitiki zoseweretsa. Zolimbitsa mchere wa lead ndi cadmium pamapeto pake zidzasinthidwa kwathunthu ndi zolimbitsa PVC zopanda poizoni. Kupanga zowonjezera zapulasitiki zakunja kudzakhala kwakukulu komanso kwapadera, zofunikira zoteteza chilengedwe ndizofunika kwambiri, komanso zogwira ntchito bwino komanso zogwira ntchito zambiri. Kafukufuku ndi chitukuko cha zolimbitsa zatsopano za PVC zosawononga chilengedwe komanso zopanda poizoni kwakhala njira yosapeŵeka. Njira yopanda poizoni ya zolimbitsa kutentha za PVC imayang'ana kwambiri mbali ziwiri za zolimbitsa kutentha za organotin ndi calcium-zinc, ndipo kupita patsogolo kwakukulu kwachitika m'zonse ziwiri. Izi zimawonekera kwambiri mu kafukufuku wopambana komanso kugwiritsa ntchito kwambiri zolimbitsa kutentha za organotin zomwe zikuyimiridwa ndi United States, komanso kufalikira ndi kugwiritsa ntchito zolimbitsa kutentha za calcium-zinc zomwe siziyimiridwa ndi Europe, koma mtengo wa organotin ndi wokwera mtengo kwambiri. Cholimbitsa thupi cha Calcium-zinc pamapeto pake chidzamanga dongosolo lamtsogolo la PVC losawononga poizoni m'maiko onse padziko lapansi.
Amagwiritsidwa ntchito m'mapaipi, ma profiles, zolumikizira mapaipi, mbale, kupanga jakisoni, filimu yopangira blow molding, chingwe ndi zinthu zina zapulasitiki;
| khalidwe | chizindikiritso |
| mawonekedwe | Chipolopolo choyera kapena chachikasu |
| Zinthu zosakhazikika% | ≤1 |
| malo osungunuka ℃ | ≥80 |
| kuchulukana | 0.8-0.9 |
| Kuwonjezera kolimbikitsidwa (Kutengera PVC) | 4-5 |
1. Choteteza chilengedwe chobiriwira;
2. Kukhazikika kwabwino kwambiri kwa kutentha;
3. Patsani chodzazacho kufalikira bwino ndikukweza mawonekedwe a makina a chinthucho;
4. Kuchepetsa kuwonongeka kwa makina ndikuwonjezera nthawi yogwiritsira ntchito zida;
5. Itha kugwiritsidwa ntchito pazinthu zowonekera bwino ndipo imapatsa zinthu mwayi wolowera bwino.