Kuyamba kwa zinthu zapulasitiki zapakhomo

2021/01/20

Mapulasitiki ndi mankhwala opangidwa ndi ma polima, omwe amadziwika kuti pulasitiki kapena utomoni, omwe amapukutidwa ndi kuphatikiza kapena kutsitsa kwa monomers ngati zopangira. Amatha kusintha momasuka mawonekedwe ndi mawonekedwe. Amapangidwa ndi ma resin opanga, ma filler, ma plasticizers, otetezera, mafuta, zopaka utoto ndi zina zowonjezera.

Polyethylene terephthalate (PET)

Madzi amchere ambiri ndi mabotolo a zakumwa zopangidwa ndi carbonate amapangidwa ndi polyethylene terephthalate (PET) .Mu 1946, United Kingdom idasindikiza patent yoyamba yokonza PET. Mu 1949, bungwe la Britain ICI linamaliza kuyesa kuyendetsa ndege, koma United States DuPont Company itagula patent, chida chopangira chidakhazikitsidwa mu 1953, ndipo kupanga mafakitale koyamba kudakwaniritsidwa padziko lapansi.

Ubwino:

1, kukana mafuta, kukana mafuta, enic acid, kuchepetsa kukana kwa alkali, zosungunulira zambiri.

2, kuwonekera poyera, kuwunikira pang'ono kumatha kukhala kopitilira 90%, katundu wophatikizidwa amakhala ndi chiwonetsero chabwino.

3, ili ndi kutentha kwakukulu kotsika kwambiri, imatha kupirira -30â ƒ ƒ kutentha pang'ono, pogwiritsa ntchito -30â „ƒ-60â„ ƒ.

4, mpweya ndi madzi permeability ndi otsika, onse kwambiri mpweya kukana, madzi, mafuta ndi achilendo ntchito fungo.

5, kuwonekera kwakukulu, kumatha kuletsa kuwala kwa ultraviolet, kunyezimira kwabwino.

Zomwe mungagwiritse ntchito:

Mabotolo a zakumwa sangapangidwenso ndi madzi otentha, kutentha kotereku kumagonjetsedwa ndi 70â „high, kutentha kwakukulu kumasungunula zinthu zoyipa, kungoyenera zakumwa zoziziritsa kukhosi kapena zakumwa zozizira, kutentha kwa madzi kapena kutentha ndikosavuta kupunduka, pali zinthu zoyipa kuti thupi la munthu linasungunuka.