He aha nā ʻano o ka Polypropylene (PP)?

ʻO kekahi o nā waiwai koʻikoʻi o ka polypropylene:
1. Ke Kū'ē Kemika: ʻAʻole pane maʻalahi nā kumu a me nā waikawa i hoʻoheheʻe ʻia me ka polypropylene, ʻo ia ka mea e lilo ai i koho maikaʻi no nā pahu o ia mau wai, e like me nā mea hoʻomaʻemaʻe, nā huahana kōkua mua, a me nā mea hou aku.
2. Elasticity a me Toughness: E hana ʻo Polypropylene me ka elasticity ma luna o kekahi ʻano o ka deflection (e like me nā mea āpau), akā e ʻike pū ia i ka deformation plastic i ka wā mua o ke kaʻina hana deformation, no laila ua manaʻo ʻia he mea "paʻakikī". ʻO ka Toughness kahi huaʻōlelo ʻenekinia i wehewehe ʻia ʻo ia ka hiki o kahi mea ke deform (plastically, ʻaʻole elastically) me ka ʻole o ka haki ʻana.
3. Ke Kūʻē i ka Luhi: Mālama ka Polypropylene i kona ʻano ma hope o ka nui o ka torsion, ke kūlou ʻana, a/a i ʻole ke kūlou ʻana. He mea waiwai nui kēia waiwai no ka hana ʻana i nā hinges ola.
4.Insulation: he kiʻekiʻe loa ke kūpaʻa o ka polypropylene i ka uila a he mea pono loa ia no nā ʻāpana uila.
5. Transmissivity: ʻOiai hiki ke hana ʻia ka Polypropylene i moakāka, hana maʻamau ʻia ia he opaque kūlohelohe i ke kala. Hiki ke hoʻohana ʻia ka Polypropylene no nā noi kahi e koʻikoʻi ai ka hoʻoili ʻana o ka mālamalama a i ʻole kahi waiwai aesthetic. Inā makemake ʻia ka transmissivity kiʻekiʻe a laila ʻoi aku ka maikaʻi o nā plastics e like me Acrylic a i ʻole Polycarbonate.
Ua hoʻokaʻawale ʻia ka Polypropylene ma ke ʻano he mea "thermoplastic" (ʻaʻole like me ka "thermoset") e pili ana i ke ʻano o ka pane ʻana o ka plastic i ka wela. Lilo nā mea thermoplastic i wai ma ko lākou wahi heheʻe (ma kahi o 130 degere Celsius ma ke ʻano o ka polypropylene).
ʻO kahi ʻano pono nui e pili ana i nā thermoplastics ʻo ia ka hiki ke hoʻomehana ʻia a hiki i ko lākou pae heheʻe, hoʻomaʻalili ʻia, a hoʻomehana hou ʻia me ka ʻole o ka hōʻino nui ʻana. Ma kahi o ke kuni ʻana, hoʻoheheʻe ʻia nā thermoplastics e like me ka polypropylene, kahi e hiki ai iā lākou ke hoʻoheheʻe maʻalahi ʻia a laila hana hou ʻia.
I ka hoʻohālikelike ʻana, hiki ke hoʻomehana ʻia nā plastics thermoset i hoʻokahi manawa wale nō (ʻo ka maʻamau i ka wā o ke kaʻina hana hoʻoheheʻe ʻana). ʻO ka hoʻomehana mua ʻana e hoʻopaʻa i nā mea thermoset (e like me ka epoxy 2-ʻāpana) e hopena ana i kahi loli kemika hiki ʻole ke hoʻohuli ʻia. Inā ʻoe e hoʻāʻo e hoʻomehana i kahi plastic thermoset i kahi mahana kiʻekiʻe i ka lua o ka manawa e puhi wale ia. ʻO kēia ʻano e hoʻolilo i nā mea thermoset i mau moho maikaʻi ʻole no ka hana hou ʻana.