ʻO ka lāʻau PP (Polypropylene) Extruded

ʻO ke koʻokoʻo PP (polypropylene) he mea semi-crystalline e kū nei ma muli o kāna hui kūʻokoʻa o nā mea kino a me nā mea hana. ʻO kekahi o kāna mau hiʻohiʻona kaulana loa, ʻo ia ka paʻakikī a me ka helu heheʻe kiʻekiʻe, kahi e hoʻokaʻawale ai ia mai nā mea ʻē aʻe e like me PE (polyethylene). ʻOiai hiki ke lilo ka ʻano homopolymer o PP i mea palupalu ke ʻike ʻia i nā mahana i ʻoi aku ka kiʻekiʻe ma mua o 0°C, ua hoʻokumu ʻia ka nui o nā mea pāʻoihana PP e like me nā copolymers random a i ʻole nā ​​copolymers clamp me nā pākēneka like ʻole o ka ethylene.

Loaʻa i nā copolymers random ka 1 a hiki i ka 4% ethylene, aʻo nā copolymers hoʻopili i ʻoi aku ka nui o ka ethylene. ʻO kēia kaʻina hana copolymerization ka hopena i kahi mea PP me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa (100 ° C) i hoʻohālikelike ʻia me ka homopolymer PP. ʻOiai ʻoi aku ka liʻiliʻi o ka ʻano copolymer PP material, ʻālohilohi, a me ka rigidity, ʻoi aku ka ikaika o ka hopena. Ke piʻi aʻe ka ʻike ethylene i loko o ka copolymer, piʻi pū ka ikaika holoʻokoʻa o ka mea PP, e lilo ia i koho maʻalahi no nā noi like ʻole.

ʻO kekahi hiʻohiʻona koʻikoʻi o ka PP ʻo ia ka wela hoʻoluʻu Vicat, ʻo ia ka 150 ° C. ʻO kēia kūpaʻa wela kiʻekiʻe, i hui pū ʻia me ke kiʻekiʻe kiʻekiʻe o ka crystallinity o ka mea, ka hopena i ka ʻoʻoleʻa maikaʻi o ka ʻili a me ka pale ʻana. Hana kēia mau waiwai iā PP i kahi koho kūpono no nā noi kahi mea koʻikoʻi ka lōʻihi a me ke kūʻē ʻana i ka lole a me ka waimaka.

Eia kekahi, ʻike ʻia ʻo PP no kona kūʻē ʻana i ke koʻikoʻi o ke kaiapuni, kahi pilikia maʻamau i nā mea ʻē aʻe. He koho hilinaʻi kēia no ka hoʻohana ʻana i nā kaiapuni kahi e ʻike ʻia ai i nā kemika, ka makū, a i ʻole nā ​​​​mea pilikia ʻē aʻe.

Ma kahi o kāna mau waiwai mechanical, hāʻawi pū ʻo PP i ka hana maikaʻi loa. Hiki ke maʻalahi a hana ʻia me ka hoʻohana ʻana i nā ʻano hana hana like ʻole, e like me ka hoʻoheheʻe ʻana, extrusion, a me ka hoʻoheheʻe ʻana. ʻO kēia versatility, i hui pū ʻia me kāna mau waiwai ʻē aʻe, hoʻolilo ʻo PP i kahi koho kaulana no kahi ākea o nā noi, me ka hoʻopili ʻana, nā ʻāpana automotive, a me nā huahana mea kūʻai aku.