Nā mea hoʻopaʻa ahi ma muli o ka Nitrogen
ʻO nā mea pale ahi i hoʻokumu ʻia i ka nitrogen, ke kālele nei kēia ʻatikala i ka melamine a me kāna mau mea i loaʻa, hiki ke hoʻohana wale ʻia kekahi o ia mau mea a i ʻole nā mea nui o nā mea pale ahi intumescent. ʻAʻohe halogen kēia mau mea pale ahi, haʻahaʻa ka uahi, paʻa i ka wela a me ka mālamalama, me ka maikaʻi o ka pale ahi a me ke kumukūʻai haʻahaʻa. ʻO ka pilikia me lākou, ʻo nā plastics a lākou e hoʻohana ai e pale ahi he paʻakikī ke hana a hoʻopuehu maikaʻi ʻole ʻia i loko o ka mea kumu. ʻOi aku ka paʻakikī o nā koi no ka nui o nā ʻāpana a me ka hoʻolaha ʻana o ka nui o nā ʻāpana a i kekahi manawa koi ʻia nā mea hana like. Ma waho aʻe o ka melamine, aia pū kekahi melamine cyanurate (MCA) , phosphates, borates, guanidine salts, dicyandiamide salts, etc. Hoʻohana ʻia kēia mau mea pale ahi ma PA, PU a me PO. Hiki ke hoʻohana ʻia ma PA, PU, PO, PET, PS, PVC a me nā resins epoxy, a kūpono hoʻi no nā lole, nā pena, ka lāʻau a me ka pepa.
ʻO kekahi o ka hoʻohana nui ʻana o nā pūhui nitrogen-containing e like me nā mea pale ahi i hui pū ʻia me nā phosphorus-containing flame retardants e loaʻa ai kahi hopena phosphorus-nitrogen synergistic. ʻO ka hui pū ʻana o nā pūhui nitrogen-containing me ka phosphorus-containing compounds he kiʻekiʻe aʻe ka hopena o ka lapalapa ahi ma luna o cellulose ma mua o ka huina o nā hopena pale ahi o kēlā me kēia pūhui. Hoʻoikaika ʻo Nitrogen i ka phosphorylation o cellulose e ka phosphoric acid a pēlā e kōkua ai i ka pehu ahi-retardant hopena. No laila, ʻo nā mea hana o nā mea hoʻopaʻa ahi intumescent he phosphorus a me ka nitrogen.
Melamine
ʻO ka Melamine (MA) ʻaʻole hiki ke puhi ʻia, maʻalahi ke hoʻohaʻahaʻa i ka wā i hoʻomehana ʻia, a decomposes ke hoʻomehana ʻia. ʻO nā kumu he maikaʻi loa ka pale ahi:
- Hiki i nā hopena decomposition ma 250 a 450 ° C, e hoʻomoʻi i ka nui o ka wela a hāʻawi i ka amonia e hana i nā ʻano condensates;
- ʻO ka hiki ke hoʻoikaika i ka hana hoʻoheheʻe ʻana o ka mea a hoʻolalelale i kona charring i loko o ka coke.
ʻO ka Melamine he mea kūʻaiʻole,ʻaʻohe meaʻino,ʻaʻole hoʻonāukiuki i kaʻili a me nā maka, aʻaʻole he mutagen. ʻO ka hemahema, ʻo ia ka hana ʻana i ka cyanide ʻawaʻawa ke hoʻoheheʻe ʻia i nā wela kiʻekiʻe.
ʻO ka Melamine kahi mea hoʻopaʻa ahi i hoʻohana nui ʻia, ma ke ʻano he ʻāpana o nā mea hoʻopaʻa ahi intumescent a no ka polyurethane pale ahi a me nā resins triazine. Hoʻohana ʻia me ka hui pū me nā esters phosphate wai, hoʻohana nui ʻia ka melamine e hoʻopau i ka lapalapa polyurethane foam.
Melamine cyanurate
Hoʻokumu ʻia ka melamine cyanurate ma ka hana ʻana i ka melamine me ka cyanuric acid, i kapa ʻia ʻo MCA. He mea lubricant a me ka lapalapa ahi, he pauda crystalline keʻokeʻo, ʻaʻole ʻono a ʻono ʻole. He paʻa loa ia ma lalo o 300 ° C a hoʻomaka i ka sublimate ma kahi o 350 ° C, akā ʻaʻole ia e decompose, ʻo kona wela decomposition ma kahi o 440 ~ 450 ° C. Loaʻa i ka MCA ka nui o ka nitrogen maʻalahi, maʻalahi loa e hoʻomoʻa i ka makū, ka wai wela kiʻekiʻe i loko o ka lanahu, ka puhi ʻana i ke kinoea nitrogen, hoʻoheheʻe i ka ʻike o ka oxygen a me ka decomposition polymer i hana ʻia e ke kinoea. Eia kekahi, ʻo ka hana o ke kinoea a me ka convection wela e lawe i kahi ʻāpana o ka wela, no laila e hāʻawi ana i kahi hana pale ahi.
Hoʻohana nui ʻia ʻo MCA i ka lāʻau, nylon, phenolic resins, epoxy resins, acrylic emulsions a me nā resins olefin ʻē aʻe. Hoʻohana ʻia ʻo MCA ma ke ʻano he pale ahi no nā resins epoxy. Hoʻonui ʻia ka helu oxygen mai 24% a i 28% a i 46% a i 48% a kūpono loa ia no nā ʻāpana uila a me nā ʻāpana. Hoʻohui ʻia ia i nā emulsions vinyl acetate, emulsions acrylate a me nā emulsions rubber e hana i nā uhi pale ahi me ka hoʻopili maikaʻi ʻana a me ka maʻalahi, a ʻaʻohe mea hoʻonaninani.
He mea pale ahi triazine ʻo MCA me nā waiwai maikaʻi loa a ʻoi aku ka maikaʻi o kona hoʻohana ʻana a i ʻole ke kāwili ʻana me nā mea pale ahi ʻē aʻe ma mua o ka hoʻohana ʻana i ka melamine wale nō.
Melamine phosphonates
Hiki ke hoʻomākaukau ʻia nā melamine phosphonates mai ka melamine a me ka monophenylphosphonic acid. ʻO ka hemahema ʻo ia ka paʻakikī o ka hoʻomākaukau ʻana a me ka pale ʻana mai ka huʻa ʻana i ka hui ʻana me nā polyolefins, lawe ʻia ka degassing. Hiki i kēia pale ahi ke hoʻopōʻino i ke kala. Hoʻohana nui ʻia ia e like me ka pale ahi no nā polyolefins a me ka polystyrene.
Melamine pyrophosphate
Hiki ke hana ʻia ka melamine pyrophosphate ma ka mālama ʻana i ka melamine me ka waikawa phosphoric a laila hoʻomehana iā ia ma 250-270 ° C. Nui nā mea pale ahi no nā fiber, textiles a me kekahi mau plastics, akā ʻaʻole i ʻoluʻolu ka hopena pale ahi ma nā plastik polyurethane, ʻoiai hiki ke hoʻohana pono ʻia ka melamine pyrophosphate i nā plastic polyurethane retard flame. ʻO ka polypropylene pale ahi ma kāna huahana hoʻihoʻi me ka pentaerythritol a i ʻole kāna huahana hoʻihoʻi me ka pentaerythritol a me ka waika phosphoric hiki ke hana i kahi mea hiki ke hoʻā ʻole ʻia, ʻaʻole kulu ʻia.
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