Polyethylene haʻahaʻa haʻahaʻa (LDPE) vs Polymer PTFE/FEP Mīkini

ʻO ka polyethylene haʻahaʻa haʻahaʻa (LDPE) kahi thermoplastic i hana ʻia mai ka monomer ethylene.ʻO ia ka papa mua o ka polyethylene, i hana ʻia ma 1933 e Imperial Chemical Industries (ICI) me ka hoʻohana ʻana i kahi kaʻina hana kiʻekiʻe ma o ka polymerization radical manuahi.Hoʻohana ka hana ʻana i ke ʻano like i kēia lā.Manaʻo ka EPA he 5.7% o LDPE (helu helu 4) i hana hou ʻia.ʻOiai ka hoʻokūkū mai nā polymers hou aʻe, ke hoʻomau nei ʻo LDPE i kahi papa plastik koʻikoʻi.

PTFEhe paʻa fluorocarbon, no ka mea, he pūhui kiʻekiʻe-molekala-kaumaha i loko o ke kalapona a me ka fluorine.He hydrophobic ka PTFE: ʻaʻole wai ka wai a ʻaʻole wai ka wai i ka PTFE, ʻoiai e hōʻike ana nā fluorocarbons i nā ikaika hoʻopuehu London ma muli o ke kiʻekiʻe electronegativity o ka fluorine.ʻO ka PTFE kekahi o nā coefficient haʻahaʻa loa o ka friction o kekahi paʻa.

Hoʻohālikelike o LDPE a me Polymer PTFE/FEP Waiwai Waiwai

Noi Mea

Polyethylene haʻahaʻa haʻahaʻa (LDPE):

Hoʻohana nui ʻia ʻo LDPE no ka hana ʻana i nā ipu like ʻole, ka hāʻawi ʻana i nā ʻōmole, nā ʻōmole holoi, nā paipu, nā ʻeke plastik no nā ʻāpana kamepiula, a me nā mea hana ʻenehana i hoʻoheheʻe ʻia.ʻO kāna hoʻohana maʻamau i loko o nā ʻeke plastik.ʻO nā huahana ʻē aʻe i hana ʻia mai ia mea:

• * Nā pā a me nā pahu hana maʻamau
• * Nā ʻili hana pale ʻino
• * Nā ʻāpana e pono e weldable a machinable
• * Nā ʻāpana e pono ai ka maʻalahi, kahi e lawelawe maikaʻi ai
• * ʻO nā ʻāpana palupalu loa e like me nā poʻi paʻa
• * ʻEono pahu apo
• * Hana ʻia nā pahu wai a me ka waiu me ka papa hoʻopili wai, kahi laminate o ka pepa pepa a me ka LDPE (ʻo ia ka papa wai o loko a me waho), a pinepine me kahi papa o ka alumini alumini (pēlā e lilo ai i ʻeke aseptic).
• * Hoʻopili ʻia no nā lako kamepiula, e like me nā disk drive, nā kāleka pale, a me nā disk drive optical
• * Nā paheʻe pāʻani
• * ʻO nā ʻōpala palaki

POLYMER PTFE/FEP:ʻO nā mea hoʻonā kelepona; ʻAʻole lubricated bearings; O-rings; Sila; Capacitors; Hana semiconductor; Nā ʻāpana uila wela kiʻekiʻe; Gaskets; Nā ʻāpana valve.

Mea waiwai:

Polyethylene haʻahaʻa haʻahaʻa (LDPE):a;Ua wehewehe ʻia ʻo LDPE e kahi ākea ākea o 0.910–0.940 g/cm3.ʻAʻole ia e hoʻoulu i nā mahana lumi, koe wale nō me nā mea hoʻoheheʻe ikaika, a ʻo kekahi mau solvents ke kumu i ka pehu.Hiki iā ia ke pale i nā mahana o 80 ° C mau a me 95 ° C no ka manawa pōkole.Hana ʻia i nā ʻano like ʻole translucent a i ʻole opaque, maʻalahi a paʻakikī.

b;ʻOi aku ka lālā o ka LDPE (ma kahi o 2% o nā ʻātoma kalapona) ma mua o HDPE, no laila ʻoi aku ka nāwaliwali o nā pūʻali intermolecular (instantaneous-dipole induced-dipole attraction), haʻahaʻa kona ikaika tensile, a ʻoi aku ka kiʻekiʻe.Eia kekahi, no ka mea, ʻaʻole i paʻa paʻa kona mau molekala a emi ʻole ka crystalline ma muli o nā lālā ʻaoʻao, ʻoi aku ka haʻahaʻa.

c;Ke kū'ē kū'ē: 1, Kū'ē maikaʻi (ʻaʻohe hoʻouka /ʻaʻohe hopena kemika) e hoʻoheheʻe a hoʻokaʻawale i nā waikawa, nā waiʻona, nā kumu a me nā esters; 2, Ke kū'ē maikaʻi (ka hoʻouka liʻiliʻi / haʻahaʻa haʻahaʻa haʻahaʻa) i nā aldehydes, nā ketones a me nā aila mea kanu;3, ʻO ke kūpaʻa liʻiliʻi (ka hoʻouka haʻahaʻa / ka hopena kemika nui, kūpono no ka hoʻohana pōkole wale nō) i ka aliphatic a me ka aromatic hydrocarbons, nā aila mineral, a me nā mea hoʻokahe;

POLYMER PTFE/FEP:ʻO nā waiwai dielectric maikaʻi loa; ʻAʻole i ka hapa nui o nā mea kemika; ʻO ka wela kiʻekiʻe a me ke kūpaʻa kemika; Haʻahaʻa haʻahaʻa haʻahaʻa o ka friction; ʻOi aku ka maikaʻi o ka pale ʻana i ka radiation; Zero moisture absorption; Pili ʻole i ka mana pinepine; Machinability.