mea uwea PE

ʻO ka PE he pūhui polyethylene, i māhele nui ʻia i ka polyethylene high density (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE) a me linear low density polyethylene (LLDPE).

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ʻO 1.HDPE kahi ʻano crystallinity kiʻekiʻe, non-polar thermoplastic resin i hana ʻia e ka ethylene copolymerization. ʻO ka hiʻohiʻona o ka HDPE mua he keʻokeʻo waiū, a he translucent i kekahi ʻano ma ka ʻāpana liʻiliʻi. He kūpaʻa maikaʻi loa ia i ka hapa nui o nā kemika home a me nā ʻoihana, a hiki iā ia ke pale aku i ka corrosion a me ka hoʻoheheʻe ʻana o nā oxidants ikaika (concentrated nitric acid), acid a me nā paʻakai alkali a me nā mea hoʻoheheʻe organik (carbon tetrachloride). ʻAʻole komo ka polymer i ka makū a maikaʻi ke kūpaʻa wai i ka mahu, hiki ke hoʻohana ʻia no ka pale ʻana i ka makū a me ka seepage.

ʻO 2.MDPE ka mea i hōʻike ʻia e ke koʻikoʻi o ke kaiapuni i ka haki ʻana i ke kūpaʻa a me ka paʻa ʻana o ka ikaika lōʻihi. ʻO ka mānoanoa pili o MDPE ʻo 0.926-0.953, ʻo ka crystallinity he 70% -80%, ʻo ke kaumaha molecular awelika he 200,000, ʻo ka ikaika tensile he 8-24 mpa, ʻo ka elongation ma ka haʻihaʻi ʻo 50% -60%, ʻo ka wela hoʻoheheʻe. 126-135 ℃, a he 0.1-35 g / 10 minuke ke kahe kahe o ka hehee. Ka wela wela (0.46 mpa)49-74 ℃.

3. ʻO ka polyethylene haʻahaʻa haʻahaʻa ka māmā loa o ka polyethylene resin. Ke hoʻohālikelike ʻia me ka polyethylene kiʻekiʻe, ʻoi aku ka haʻahaʻa o kona crystallinity (55% -65%) a me ka wahi palupalu (90-100 ℃). Loaʻa iā ia ka palupalu maikaʻi, extensibility, transparency, pale anuanu a me ka processability. He maikaʻi kona kūpaʻa kemika, hiki ke kū i ka waika, alkali a me ka wai paʻakai; ʻO ka insulation uila maikaʻi a me ke kinoea permeability; Haʻahaʻa haʻahaʻa wai; Maʻalahi e puhi. He palupalu ka waiwai, me ka hoʻonui maikaʻi ʻana, ka insulation uila, ke kūpaʻa kemika, ka hana ʻana a me ke kūpaʻa haʻahaʻa haʻahaʻa (kūʻē i -70 ℃).

4. Hoʻohālikelike ʻia me LDPE, loaʻa iā LLDPE nā mea maikaʻi o ka ikaika kiʻekiʻe, ka paʻakikī maikaʻi, ka rigidity ikaika, ka pale ʻana i ka wela, ke kū anuanu, etc. nā mea hoʻoheheʻe organik a pēlā aku.

'Ōlelo Aʻo: Ua hoʻohana nui ʻia ka PE plastic particle a pono e hoʻopilikino ʻia e like me nā koi o ka mea kūʻai aku ma nā ʻano hiʻohiʻona like ʻole.

ʻāpana huahana

Inoa	HDPE	LDPE	LLDPE
ʻala, ʻona	ʻAʻohe ʻona, ʻono ʻole, ʻala ʻole	ʻAʻohe ʻona, ʻono ʻole, ʻala ʻole	ʻAʻohe ʻona, ʻono ʻole, ʻala ʻole
ʻO ka mānoanoa	0.940~0.976g/cm³	0.910~0.940g/cm³	0.915~0.935g/cm³
Crystallinity	85%-65%	45-65%	55-65%
ʻO ka molekala	Loaʻa i nā paʻa kalapona-kāpona a me carbon-hydrogen wale nō, e koi ai i ka ikehu hou aʻe e wāwahi	ʻOi aku ka liʻiliʻi o ke kaumaha molekala o ka polymer a pono e emi ka ikehu e haki ai	ʻO ka laina laina, nā kaulahao lālā liʻiliʻi, nā kaulahao pōkole, pono e emi ka ikehu e haki
Lae palupalu	125-135 ℃	90-100 ℃	94-108 ℃
Waiwai mīkini	ʻO ka ikaika kiʻekiʻe, ka paʻakikī maikaʻi, ka paʻakikī ikaika	ʻAʻohe ikaika mechanical	ʻO ka ikaika kiʻekiʻe, ka paʻakikī maikaʻi, ka paʻakikī ikaika
Ka ikaika tensile	Kiʻekiʻe	Haʻahaʻa	Kiʻekiʻe
Elongation i ka wā hoʻomaha	Kiʻekiʻe	Haʻahaʻa	Kiʻekiʻe
Ka ikaika hopena	Kiʻekiʻe	Haʻahaʻa	Kiʻekiʻe
ʻO ka hoʻokō ʻana i ka wai a me ka wai	Loaʻa iā ia ka permeability maikaʻi i ka wai, ka wai a me ka ea, ka haʻahaʻa wai haʻahaʻa a me ke kūpaʻa permeability maikaʻi	ʻAʻohe maʻamau a me ka pale ʻana i ka ea	Loaʻa iā ia ka permeability maikaʻi i ka wai, ka wai a me ka ea, ka haʻahaʻa wai haʻahaʻa a me ke kūpaʻa permeability maikaʻi
ʻAkika, alkali, corrosion, organic solvent resistance	Kū'ē i ka corrosion oxidant ikaika; Kū'ē i ka waikawa, alkali a me nā paʻakai like ʻole; ʻAʻole hiki ke hoʻoheheʻe ʻia i loko o kekahi mea hoʻoheheʻe organik, etc.	ʻAkika, alkali, paʻakai hoʻonā corrosion kū'ē, akā ilihune'ūheheʻe kū'ē	Kū'ē i ka waikawa, alkali a me nā mea hoʻoheheʻe organik
Kūleʻa wela/anu	ʻO ka wela maikaʻi a me ke anu anuanu, ma ka lumi wela a hiki i ka -40F haʻahaʻa haʻahaʻa, maikaʻi ka hopena hopena, haʻahaʻa haʻahaʻa embrittlement mahana	Haʻahaʻa wela pale, haʻahaʻa wela embrittlement mahana	ʻO ke kūpaʻa maikaʻi o ka wela a me ke anu haʻahaʻa haʻahaʻa haʻahaʻa embrittlement mahana
Ke kū'ē i ke koʻikoʻi o ke kaiapuni	Maikaʻi loa	ʻoi aku ka maikaʻi	Maikaʻi loa