Nūhou

Ma waena o nā plastics ʻenekinia, kū kekahi mea no kona kūpaʻa ʻana i ka ʻaʻahu, ke kūpaʻa i ka hopena, a me nā waiwai lubrication ponoʻī, e lilo ia i hoʻokahi o nā hopena hope loa no nā kūlana hana koi. ʻO ka polyethylene kaumaha molekala kiʻekiʻe loa (UHMWPE) ua hoʻololi ʻia i ʻano pepa, e hoʻonui ana i kāna laulā noi i nā pae i ʻike ʻole ʻia, e pāʻani ana i kahi kuleana nui i nā mea āpau mai nā ʻōnaehana hoʻoili ʻoihana kaumaha a hiki i nā laina hana meaʻai.

I. Ke Hoʻomaopopo ʻana iā UHMWPE: He aha ka "Ultra-High Molecular Weight"?

ʻAʻole ʻo UHMWPE he polyethylene maʻamau. Aia kona kikowaena i loko o kona "kaumaha molekala kiʻekiʻe loa"—ʻoi aku ka lōʻihi o kona mau kaulahao molekala ma mua o 10 mau manawa ma mua o nā polyethylene kiʻekiʻe maʻamau (HDPE), maʻamau ma mua o 1.5 miliona. Ua hihia kēia mau kaulahao molekala, e hana ana i kahi ʻano molekala paʻa loa e hāʻawi ana i ka mea i kona mau waiwai kino kupaianaha.

Hana ʻia ka pepa UHMWPE mai kēia mea kūikawā ma o ke kaʻina hana sintering, kaomi ʻana, a i ʻole extrusion. Loaʻa kona mānoanoa mai kekahi mau millimeters a i nā haneli millimeters, e hoʻokō ana i nā pono o nā noi like ʻole.

II. ʻElima mau waiwai koʻikoʻi oPepa UHMWPE

1. Ke Kū'ē Loa i ka ʻAʻahu: ʻO kēia ke ʻano koʻikoʻi o ka UHMWPE. ʻOi aku ke kiʻekiʻe o kona kūpaʻa ʻana i ka ʻaʻahu ma mua o nā metala he nui (e like me ke kila kalapona a me ke kila kila), 4-5 mau manawa o ka nylon (PA), a 3 mau manawa o ka polyoxymethylene (POM). I nā wahi ʻaʻahu abrasive, ʻo ia nō ka "Mōʻī o nā Plastics."

2. Ke Kū'ē Loa i ka Hopena Kiʻekiʻe Loa: ʻOiai i nā mahana haʻahaʻa (-40°C a i ʻole ka haʻahaʻa), e mau ana kona ikaika hopena kiʻekiʻe loa, e omo pono ana i nā haʻalulu a me nā haʻalulu me ka ʻole o ka haki a wāwahi maʻalahi paha.

3. Nā ʻAno Lubrication Self-Lubrication maikaʻi loa a me nā ʻAno ʻAʻole Pipiʻi: He haʻahaʻa loa kona coefficient of friction, e like me ka wai, a hōʻike ia i nā ʻano ʻaʻole piʻi. Hoʻemi kēia i ke kū'ē ʻana i ka wā e paheʻe ai nā mea ma luna o kona ʻili, e pale ana i ka hoʻopili ʻana a hoʻemi nui i ka ʻaʻahu a me ka haehae ʻana ma nā lako a me nā mea hana.

4. Ke Kū'ē Kemika: Hōʻike ia i ke kūpaʻa maikaʻi loa i ka hapa nui o nā hopena waikawa, alkali, a me ka paʻakai, e kūpono ai no ka hoʻohana ʻana i nā wahi ʻino e like me ka hana kemika.

6. Maʻemaʻe a ʻaʻohe ʻawahia: Hoʻokō ia me ka palapala hōʻoia US FDA a me USDA, hiki ke hoʻopili pololei i ka meaʻai a me nā lāʻau lapaʻau, a hoʻohana nui ʻia i ka hana ʻana i ka meaʻai a me nā ʻoihana lapaʻau. I ka manawa like, he haʻahaʻa loa ka omo ʻana o ka wai a ʻaʻole maʻalahi ka hoʻoulu ʻana i ka bacteria.

IV. No ke aha e koho aiPepa UHMWPE? — Hoʻohālikelike me ka Metala a me nā Plastics ʻenekinia ʻē aʻe

1. Hoʻohālikelike ʻia me ka Metala (e laʻa, Kalapona Kila, Kila Kūlohelohe):

ʻOi aku ka pale ʻana i ke komo ʻana: ʻOi aku ka lōʻihi o kona ola ma mua o ke metala ma lalo o nā kūlana ʻaʻahu abrasive.
Māmā: ʻO kona nui he 0.93-0.94 g/cm³ wale nō, 1/7 o ke kila, e maʻalahi ai ke hoʻouka a me ka lawe ʻana.

Walaʻau ʻole: Hana mālie ia, e hoʻopau ana i ke kani ʻino o ka haʻalulu metala.

Kūpaʻa i ka ʻino: He kūpaʻa ia i ka ʻino a kūpaʻa i nā kemika.

2. Hoʻohālikelike ʻia me nā Plastics ʻenekinia ʻē aʻe (e laʻa, Nylon, Polyoxymethylene):

ʻOi aku ka pale ʻana i ke komo ʻana: ʻOi aku ka nui o kona pale ʻana i ke komo ʻana i kekahi mau manawa.

Ka Haʻalulu Haʻahaʻa: ʻOi aku ka maikaʻi o kona mau waiwai lubrication ponoʻī.

ʻOi aku ka pale ʻana i ka hopena: ʻIke nui ʻia kona mau pono i nā mahana haʻahaʻa.

Pepa UHMWPEhe kanaka ikaika mālie ʻo ia ma ke kahua o nā mea ʻoihana hou. ʻOiai ʻaʻole paʻakikī e like me ka metala, ʻo kona kūpaʻa ʻole i ka ʻaʻahu a me ka hana piha e lilo ia i mea pāʻani pono ʻole i ka hakakā ʻana i ka ʻaʻahu, ka hōʻemi ʻana i ka hoʻohana ʻana i ka ikehu, a me ka hoʻomaikaʻi ʻana i ka pono. Mai nā mines a i nā lumi kuke, mai nā hale hana a i nā kahua haʻuki, ʻo ke kūpaʻa o kēia pepa "super plastic" e pale aku i ka hana lōʻihi o nā mea hana he nui ʻole, e lilo ia i "kahu pale ʻaʻahu" a me "mea pale kahe" maoli ma ke kahua ʻoihana.