Ma ke ʻano he kumu waiwai nui no nā masks, ua piʻi nui ke kumukūʻai meltblown i Kina, a hiki i ke kiʻekiʻe e like me nā ao. Ua piʻi aʻe ke kumu kūʻai o ka polypropylene melt index kiʻekiʻe (PP), ka mea maka no nā lole meltblown, a ua hoʻāla ka ʻoihana petrochemical home i ka nalu o ka hoʻololi ʻana i nā mea polypropylene melt index kiʻekiʻe.
Ma ke ala, pono e hoʻomaopopo ʻia he biodegradable nā mea meltblown maoli. ʻO ka 2040 maʻamau i hoʻohana ʻia ma ka mākeke he mea PP maʻamau wale nō, a ua hoʻololi ʻia nā mea meltblown PP maoli. I kēia manawa, no nā mīkini liʻiliʻi (extruders hoʻololi ʻia) ma ka mākeke, ʻaʻole paʻa ka hoʻohana ʻana i nā mea meltblown fluidity kiʻekiʻe. ʻOi aku ka nui o ka mīkini, ʻoi aku ka maikaʻi o ka hoʻohana ʻana i ka waiwai hoʻoheheʻe kiʻekiʻe meltblown PP. ʻO nā pilikia maikaʻi o nā mīkini liʻiliʻi iā lākou iho no ka hapa nui o nā kumu. Pono ka lole hoʻoheheʻe maʻamau i ka hoʻohana ʻana i 1500 melt finger meltblown mea hoʻoheheʻe kūikawā, me ka hoʻohui ʻana i ka masterbatch polar a me ka mālama ʻana i ke kaʻina polar e hoʻomaikaʻi hou i ka pono kānana.
I kēia lā, ua hōʻuluʻulu ka mea hoʻoponopono i kahi ʻatikala e pili ana i nā hiʻohiʻona hana o ka hoʻololiPP meltblown mea, manaʻolana e kōkua i nā mea a pau. Inā makemake ʻoe e hana i nā lole hoʻoheheʻe i kūpono i nā kūlana aupuni KN90, KN95, a me KN99, pono ʻoe e hoʻomaopopo i ke kaʻina hana holoʻokoʻa, ʻike i nā hemahema o ke kaʻina hana, a hoʻoponopono iā lākou. ʻO ka mua, e hoʻomaka kākou me ka hoʻoheheʻe ʻia o nā mea maka.
ʻO ka helu heheʻe kiʻekiʻe e pili ana i ka melt blown grade PP material
ʻAʻole hiki ke hana i nā masks hana me ka ʻole o ka lole spunbond a me ka lole hoʻoheheʻe ʻia, ʻelua mau mea hoʻoheheʻe kiʻekiʻe PP ma hope o ka hoʻohaʻahaʻa ʻana. ʻOi aku ka kiʻekiʻe o ka helu heheʻe o PP i hoʻohana ʻia no ka hana ʻana i ka lole hoʻoheheʻe ʻia, ʻoi aku ka maikaʻi o ka puhi ʻana o nā fibers, a ʻoi aku ka maikaʻi o ka hana kānana ʻana o ka lole meltblown. ʻO ka PP me ka haʻahaʻa haʻahaʻa molecular a me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa e maʻalahi ka hana ʻana i nā fibers me ka like ʻole.
ʻO ka mea maka no ka hana ʻana i ka S-layer (spunbond fabric) o nā masks ka mea nui melt melt index PP me ka melt index ma waena o 35-40, aʻo ka mea no ka hana M-layer (meltblown fabric) he meltblown grade PP me kahi kiʻekiʻe melt index (1500). ʻAʻole hiki ke hoʻokaʻawale ʻia ka hana ʻana o kēia mau ʻano ʻelua o ka helu hoʻoheheʻe kiʻekiʻe ʻo PP mai kahi kumu waiwai nui, ʻo ia ka mea hoʻoheheʻe organik peroxide.
Ma muli o ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa o ka PP maʻamau, ʻilihune kona kahe ʻana i ka moku i hoʻoheheʻe ʻia, e kaupalena ana i kāna noi ma kekahi mau kahua. Ma ka hoʻohui ʻana i nā peroxide organik e hoʻololi i ka polypropylene, hiki ke hoʻonui ʻia ka helu heheʻe o PP, hiki ke hoʻemi ʻia kona kaumaha molekala, a hiki ke hoʻemi ʻia ka puʻu kaumaha molekala o PP, e hopena i ka maikaʻi o ka kahe a me ke kiʻekiʻe kiʻekiʻe. No laila, hiki ke hoʻohana nui ʻia ʻo PP i hoʻololi ʻia e ka organik peroxide degradation i loko o ka hoʻoheheʻe ʻia ʻana o ka paia lahilahi a me nā māla lole non-woven.
ʻO kekahi mau mea hoʻohaʻahaʻa peroxide
ʻO nā peroxides organik ka papa 5.2 mau kemika weliweli me nā koi koʻikoʻi no ka hana ʻana, mālama, ka lawe ʻana, a me ka hoʻohana. I kēia manawa, he liʻiliʻi wale nā peroxide organik i hoʻohana nui ʻia no ka hoʻohaʻahaʻa ʻana o PP ma Kina. Eia kekahi mau mea:
Di tert butyl peroxide (DTBP)
ʻO kāna mau hiʻohiʻona nui e like me kēia:
ʻAʻole i ʻae ʻia e FDA no ka hoʻohui ʻana i ka PP, ʻaʻole i ʻōlelo ʻia no ka hana ʻana i ka papa meaʻai a me nā huahana maʻemaʻe.
ʻO ka helu uila he 6 ℃ wale nō, a paʻakikī loa ia i ka uila paʻa. Ua lawa ka 0.1MJ o ka ikehu e puhi ai i kona mahu, e maʻalahi ka uila a pahū ma ka lumi wela; ʻOiai me ka pale ʻana i ka nitrogen, hiki nō iā ia ke uila a pahū i nā wahi ma luna o 55 ℃.
He haʻahaʻa loa ka coefficient conductivity, e maʻalahi ka hōʻiliʻili ʻana i nā uku i ka wā o ke kaʻina kahe.
Ua helu ʻia ʻo DTBP e ka European Chemical Agency (ECHA) i ka makahiki 2010 ma ke ʻano he Level 3 inducing gene mutation substance a ʻaʻole hiki ke ʻōlelo ʻia no ka hoʻohana ʻana ma ke ʻano he mea hoʻohui i ka hoʻopili ʻana i ka meaʻai a me ka hoʻopili pololei ʻana me nā huahana kanaka, no ka mea he nui ka pilikia o ka biotoxicity.
2,5-dimethyl-2,5-bis (tert butylperoxy) hexane (i kapa ʻia ʻo “101″)
ʻO kēia mea hoʻohaʻahaʻa kekahi o nā peroxides mua loa i hoʻohana ʻia ma ke kahua o ka degradation PP. Ma muli o kona ʻano wela kūpono a me ka ʻike kiʻekiʻe o nā ʻano oxygen reactive, a me kona ʻae ʻia ʻana o FDA ma ʻAmelika Hui Pū ʻIa a me ka ʻae ʻana o BfR ma ʻEulopa, ʻo ia ka mea hoʻohana nui ʻia i kēia kahua. Ma muli o ke kiʻekiʻe o nā mea hoʻoheheʻe i loko o kāna mau huahana decomposition, ʻo ka hapa nui o nā mea hoʻohui me nā ʻala pungent ikaika, ʻo ka hopena kiʻekiʻe melting point PP he ʻono ikaika. Maikaʻi no nā mea hoʻoheheʻe i hoʻohana ʻia i ka hana mask, hiki i ka hoʻohui ʻana o nā mea hoʻohaʻahaʻa nui ke kumu i nā pilikia ʻala nui no nā lole meltblown lalo.
3,6,9-Triethyl-3,6,9-Trimethyl-1,4,7-Triperoxynonane (i kapa ʻia ʻo "301″)
Ke hoʻohālikelike ʻia me nā mea hana hoʻohaʻahaʻa ʻē aʻe, ʻoi aku ka maikaʻi o ka hana palekana a me ka maikaʻi o ka hoʻohaʻahaʻa ʻana, a me ka ʻala haʻahaʻa haʻahaʻa loa, e lilo ia i hoʻokahi o nā koho i makemake ʻia no ka hoʻohaʻahaʻa ʻana i ka PP. ʻO kāna mau pōmaikaʻi penei:
● ʻOi aku ka palekana
ʻO 110 ℃ ka wela o ka hoʻoheheʻe ʻana iā ia iho, a ʻoi aku ka kiʻekiʻe o ke kukui uila me 74 ℃, hiki ke pale pono i ka decomposition a me ka uila uila o ka mea hoʻohaʻahaʻa i ka wā o ka hānai ʻana. ʻO ia ka huahana peroxide palekana loa ma waena o nā mea hoʻohaʻahaʻa i ʻike ʻia.
● ʻoi aku ka maikaʻi
Ma muli o ka loaʻa ʻana o ʻekolu mau paʻa peroxide i loko o kahi mole, hiki i ka hoʻohui ʻana o ka like like o nā ʻano oxygen reactive hiki ke hāʻawi i nā radical manuahi hou aʻe, e hoʻomaikaʻi maikaʻi ana i ka pono degradation.
ʻala haʻahaʻa
Hoʻohālikelike ʻia me "Double 25", ʻo nā pūhui volatile i hana ʻia e kona decomposition he hoʻokahi hapaʻumi wale nō o nā huahana ʻē aʻe, a ʻo nā ʻano o nā pūhui volatile ka nui o nā esters ʻala haʻahaʻa, me ka ʻole o ka hoʻonāukiuki ʻana i nā pūhui volatile. hoʻohaʻahaʻa i nā huahana PP i ka wā o ka mālama ʻana a me ka lawe ʻana, no laila e hoʻomaikaʻi maikaʻi ai i ka palekana.
ʻOiai ʻaʻole ʻōlelo ʻia ʻo DTBP ma ke ʻano he mea hoʻohaʻahaʻa no ka PP i hoʻololi ʻia, aia nō kekahi mau mea hana hale e hoʻohana ana i ka DTBP ma ke ʻano he mea hoʻohaʻahaʻa no ka hana ʻana i ka helu helu hoʻoheheʻe kiʻekiʻe ʻo PP, kahi e hoʻopilikia ai i nā pilikia palekana i ke kaʻina hana a me nā wahi hoʻohana ma hope. He pilikia koʻikoʻi ko nā huahana i loaʻa, a he nui ka pilikia o ka hōʻole ʻana a i ʻole ka hoʻāʻo ʻana i ka wā e lawe ʻia aku ai i ka mākeke honua.
Dongguan Liansheng Non ulana 'enehana Co., Ltd.ua hoʻokumu ʻia ma Mei 2020. He ʻoihana hana lole lole ʻaʻole i ulana nui ʻia e hoʻohui i ka noiʻi a me ka hoʻomohala ʻana, ka hana ʻana, a me ke kūʻai aku. Hiki iā ia ke hana i nā kala like ʻole o ka PP spunbond non-woven fabrics me ka laulā o lalo o 3.2 mika mai 9 grams a 300 grams.
Ka manawa hoʻouna: Nov-09-2024