1. Māmā

He mea māmā ka palakiko me ka nui o 0.90-2.2. ʻIke loa, hiki i nā palakiko ke lana ma luna o ka wai? ʻOi aku ka māmā o nā palakiko i hoʻomoʻa ʻia, ma muli o nā micropores i loko, ʻoi aku ka māmā o ke ʻano, a ʻo ka nui o ke ʻano he 0.01 wale nō. ʻAe kēia hiʻohiʻona i ka hoʻohana ʻana i nā palakiko i ka hana ʻana i nā huahana e pono ai ka hoʻomāmā ʻana o ko lākou kaumaha ponoʻī.

2. Kūlana kemika maikaʻi loa

Loaʻa i ka hapa nui o nā plastik ke kūpaʻa maikaʻi i ka pala i nā kemika e like me nā waikawa a me nā alkalis. ʻOi aku ka paʻa o ka kemika o ka polytetrafluoroethylene (F4), i ʻike nui ʻia ʻo ke Aliʻi o nā Plastik, ma mua o ke gula, a ʻaʻole ia e pala ʻoiai inā e hoʻolapalapa ʻia i loko o ka "aqua regia" no nā hola he ʻumi. No ka mea he kūpaʻa kemika maikaʻi loa ʻo F4, he mea kūpono ia e kū i ka pala. No ka laʻana, hiki ke hoʻohana ʻia ʻo F4 ma ke ʻano he mea no ka lawe ʻana i nā paipu wai ʻino a me ka viscous.

3. Nā waiwai hoʻokaʻawale uila maikaʻi loa

He mau alakaʻi uila maikaʻi ʻole nā ​​​​plastics maʻamau, a he nui loa ko lākou pale ʻana i ka ʻili a me ke kūʻē ʻana i ka leo, hiki ke piʻi i 109 a 1018 ohms i nā helu. He nui ka volta breakdown, a he liʻiliʻi ka waiwai tangent dielectric loss. No laila, he ākea nā noi o nā plastics i ka ʻoihana uila a me ka ʻoihana mīkini. E like me nā kaula hoʻomalu insulated plastic.

4. ʻAlakaʻi wela maikaʻi ʻole, me ka hoʻemi ʻana i ka walaʻau a me ka hopena omo haʻalulu

Ma keʻano laulā, he haʻahaʻa loa ka conductivity thermal o ka plastic, like me 1/75-1/225 o ke kila, a me nā micropores o ka foam plastic.

Loaʻa iā ia ke kinoea, kahi i ʻoi aku ka maikaʻi o ka pale wela, ka pale leo a me ke kū'ē ʻana i ka haʻalulu. No ka laʻana, ʻo ka conductivity thermal o ka polyvinyl chloride (PVC) he 1/357 wale nō o ke kila a me 1/1250 o ka alumini. Ma ke ʻano o ka hiki ke pale wela, ʻoi aku ka kiʻekiʻe o nā puka makani plastik aniani hoʻokahi ma mua o nā puka makani alumini aniani hoʻokahi, a ʻoi aku ka kiʻekiʻe o nā puka makani aniani pālua he 50%. Ma hope o ka hui ʻana o ka puka makani plastik me ke aniani hakahaka, hiki ke hoʻohana ʻia i nā hale noho, nā hale keʻena, nā keʻena, a me nā hōkele, e mālama ana i ka hoʻomehana ʻana i ka hoʻoilo a mālama i nā lilo ea-conditioning i ke kauwela, a ua maopopo loa nā pono.

5. Ka hoʻolaha ākea o ka ikaika mechanical a me ka ikaika kikoʻī kiʻekiʻe

ʻO kekahi mau palakiko he paʻakikī e like me ka pōhaku a me ke kila, a ʻo kekahi he palupalu e like me ka pepa a me ka ʻili. Mai ka manaʻo o nā waiwai mechanical e like me ka paʻakikī, ka ikaika tensile, ka elongation, a me ka ikaika hopena o nā palakiko, he ākea ko lākou ākea a he nui nā koho no ka hoʻohana ʻana. Ma muli o ke kaumaha kikoʻī liʻiliʻi a me ka ikaika kiʻekiʻe o ka palakiko, he ikaika kikoʻī kiʻekiʻe kona. Ke hoʻohālikelike ʻia me nā mea ʻē aʻe, he mau hemahema maopopo ko nā palakiko, e like me ka lapalapa ʻana, ka ʻoi aku ka paʻakikī ma mua o nā metala, ke kūpaʻa ʻole i ka ʻelemakule, a me ke kūpaʻa wela.

No laila, hoʻohana kā mākou huahana plastik i nā mea plastik e like me ke ʻano o ka huahana
ʻo kahi laʻana:punaʻo nā huahana he PP papa meaʻai a me PP papa lapaʻau.
ʻO kasyringehe papa lapaʻau PP, a me kapaipu hoʻāʻohe papa lapaʻau PP a i ʻole PS. ʻO kaʻōmole pīpīʻO ke kumu, he hui pū ʻana ia o PET a me PP.

No ka meaka ʻōmoleʻO nā mea a mākou e hoʻohana ai he kila hoʻoheheʻe maikaʻi loa, e like me 718. Maikaʻi loa ke ʻano o nā huahana plastik i hana ʻia. He 13 mau makahiki o ka ʻike mōʻaukala ko mākou ma kēia wahi, he ʻoihana loa