ʻO ka Acrylonitrile-butadiene-styrene copolymer (ABS) he mau waiwai uila maikaʻi loa, kūpaʻa anuanu, kūpaʻa ʻaila, kūpaʻa kemika, a me nā waiwai hopena, a ua hoʻohana nui ʻia i nā kahua o ka electromechanics, nā mea hana hale a me ka halihali.Eia naʻe, ʻo ka helu oxygen o ABS he 18% wale nō, a hiki ke hoʻomau i ke ahi ma hope o ke ahi, e kaupalena ana i kāna mau huahana ma nā kahua noi he nui.I mea e hoʻokō ai i ka helu ʻana o ka lapalapa ahi o ABS i ka UL94 V-0, ʻoi aku ka nui o ka nui o ka lapalapa ahi i hoʻohui ʻia.Hoʻemiʻia nāʻano mechanical o ka mea, aʻoi aku ke kumukūʻai.
ʻO ka Acrylonitrile-butadiene-styrene copolymer (ABS) he mau waiwai uila maikaʻi loa, kūpaʻa anuanu, kūpaʻa ʻaila, kūpaʻa kemika, a me nā waiwai hopena, a ua hoʻohana nui ʻia i nā kahua o ka electromechanics, nā mea hana hale a me ka halihali.Eia naʻe, ʻo ka helu oxygen o ABS he 18% wale nō, a hiki ke hoʻomau i ke ahi ma hope o ke ahi, e kaupalena ana i kāna mau huahana ma nā kahua noi he nui.I mea e hoʻokō ai i ka helu ʻana o ka lapalapa ahi o ABS i ka UL94 V-0, ʻoi aku ka nui o ka nui o ka lapalapa ahi i hoʻohui ʻia.Hoʻemiʻia nāʻano mechanical o ka mea, aʻoi aku ke kumukūʻai.
He hopena maikaʻi ko Polytetrafluoroethylene (PTFE) a ua hoʻohana nui ʻia i ka lapalapa ahi PC/ABS a me nā mea ʻē aʻe, akā he liʻiliʻi nā hōʻike noiʻi e pili ana i ka PTFE i ka ABS retardant ahi.ʻO ka ABS flame retardant maʻamau i ka ʻoihana, ʻoiai e hoʻolauna ana i ka PTFE, ua kūkākūkā i ka hopena o ka PTFE i ka hana o ka ABS retardant ahi.
1. Māhele hoʻokolohua
1.1.Nā mea maka nui
ABS, brominated triazine, antimony trioxide, PTFE, antioxidants, lubricants, etc.
1.2.Mea lako nui
Mālua-screw extruder: ʻano SHJ-35;mīkini hoʻoheheʻe injection: ʻano T80;mīkini hoʻāʻo ʻeleu i hoʻopaʻa ʻia e ka lolouila: CM6104 ʻano;thermal deformation ana mea hana: 303;mea hoʻoponopono thermogravimetric (TG): 209C ʻano.ʻO ka mea hōʻike i ka hopena o ka pendulum: Model ZBC-25B;Mea hoʻoheheʻe kahe (MFR) mea kani: MPXRZ-40A;ʻO ka mea hoʻāʻo hoʻāhu ʻāpae a me ke kūpaʻa: Model HVR-2.
1.3.Hoʻomākaukau laʻana
E hoʻomaloʻo i ka ABS ma 80 ℃ no 3 a 5 mau hola, a laila hoʻohui i ka ABS, brominated triazine, antimony trioxide, PTFE, a me nā mea hoʻohui ʻē aʻe i hoʻokahi, hoʻoheheʻe a hui pū ʻia ma o kahi extruder twin-screw no ka extrusion a me ka granulation.ʻO ka mahana extrusion ka 215-225 ℃, ka wikiwiki o ka wili he 360 r / min;a laila puhi ʻia a hoʻomaloʻo ʻia ma 80 ℃ no 2 mau hola, a laila hoʻokomo ʻia i loko o ka laʻana maʻamau, ʻo ka mahana o ka injection he 200 ~ 210 ℃.
1.4.Hoao hana
Hana ʻana i ke ahi: hoʻāʻo ʻia e like me UL94;hana tensile: hoʻāʻo ʻia e like me GB / T 1040-1992;ka ikaika kulou: hoʻāʻo ʻia e like me GB / T 9341-2000;ka ikaika hopena o ka notch cantilever: hoʻāʻo ʻia e like me GB/T 1843-1996;MFR: e like me GB / T 3682-==2000 ho'āʻo, wela 220 ℃, ukana 220kg;wela distortion wela: ho'āʻo e like me GB/T 16341-2004;Nānā TG: ka wela wela 10. C / min,.ʻO ka pae wela he 30 ~ 700 ℃, ma lalo o ka lewa nitrogen.
2. Nā hopena a me ke kūkākūkā
2.1.ʻO ka hāpana me ka ʻole o ka lapalapa ahi e ʻā loa ma hope o ka hoʻā mua ʻana, a maikaʻi ʻole ka hopena o ka lapalapa ahi.Ke hoʻohui ʻia ka nui o ka triazine brominated a me ka antimony trioxide flame retardant, ʻike ʻia ka hopena o ka lapalapa ahi, a hiki i ka pae o ka lapalapa ahi i ka pae UL94V-2, akā ʻoi aku ka lōʻihi o ka manawa wela, a ʻaʻole mau ka hopena o ka lapalapa ahi. kūpono.ʻO ka hoʻohui ʻana o PTFE e hoʻopōkole nui i ka manawa puhi o ka mea.Ke hoʻohui ʻia ka 0.2% PTFE, hoʻonui ʻia ke kiʻekiʻe o ka lapalapa ahi o ka mea mai V-2 a i V-0.ʻO kēia no ka mea he kiʻekiʻe ka helu heheʻe o ka PTFE (323 ° C), a ʻaʻole ia e hoʻoheheʻe ʻia i ka wela o ka hana ʻana, akā he maʻalahi ke fibrillate e hana i kahi ʻupena fiber ma lalo o ka ikaika shear blending, e hōʻemi ana i ka laha o ka lapalapa.
2.2.Ma hope o ka hoʻohui ʻana i ka lapalapa ahi, hāʻule nui ka ikaika o ka hopena o ka mea, ʻoiai e loli iki nā waiwai mechanical.I ka hoʻohālikelike ʻana, i ka wā e hoʻohui ʻia ai nā mea pale ahi a me PTFE i ka manawa like, ʻoi aku ka maikaʻi o ka paʻakikī o ka mea i hoʻohālikelike ʻia me ka hoʻohana ʻana i nā mea pale ahi wale nō, a i ka piʻi ʻana o ka PTFE, piʻi pū ka ikaika o ka hopena o ka mea. ʻo ia paha ʻO ka ʻōnaehana fiber i hoʻokumu ʻia e PTFE i loko o ka mea hana i kahi hana hoʻoikaika i kekahi ʻano.
2.3.Ke piʻi aʻe ka nui o ka PTFE, e emi mālie ka MFR o ka mea.Ke hoʻonuiʻia ka nui o ka PTFE he 0.3%, e emi iho ka MFR o ka lapalapa ahi ABS mai ka 23.1g / 10min i ka 14.5g / 10min, e hōʻike ana i ka hopena o ka PTFE ma nā waiwai kahe o ka mea.ʻO ka mea nui ka mea nui ma muli o ke ola ʻana o ka PTFE fiber-forming material, ka mea e pale ai i ke kahe ʻana o nā molekala ABS.Ma muli o ka hana kūikawā i hoʻokumu ʻia e PTFE i ka wā o ka hoʻoili ʻana, ʻike ʻia ka pehu ʻana o nā ʻāpana mea ma ka puka ʻana o ke kaula waiwai, e hopena i nā ʻāpana mea mānoanoa a me ka lohi ʻana i ka pelletizing.ʻOi aku ka maʻamau o ka extrusion o nā mea me ka PTFE.
2.4.TG a me DTG ka nānā ʻana o nā mea
He hoʻokahi wale nō piko o ka wela kaumaha poho i loko o ke kaʻina o thermal kaumaha poho o maemae ABS, a elua peaks o thermal kaumaha poho i loko o ke kaʻina o thermal kaumaha poho o ke ahi retardant ABS.ʻO ka piko mua ma muli o ka decomposition o ke ahi retardant, a ʻo ka lua o ka piko ma muli o ka decomposition o ABS.Me ka hoʻohui ʻana o PTFE, ʻo ke kiʻekiʻe o ka wela wela (427 ° C) o ABS he 1.8 ° C ʻoi aku ka kiʻekiʻe ma mua o ka ABS maʻemaʻe (428.8 ° C), akā ʻo ke kiʻekiʻe ʻokoʻa ʻokoʻa wela ke kaumaha kaumaha (mass heat loss rate) ( ʻO 11.7% / min) wale nō ʻO ka peak differential thermal weight loss rate o ABS maʻemaʻe (18.8% / min) ʻo 62.2%, ʻo ia ka 7.9% haʻahaʻa ma mua o ke kiʻekiʻe ʻokoʻa ʻokoʻa wela wela o ke kaumaha (12.7% / min) o ka hāpana 28 me ka ʻole. Hoʻohui ʻia ʻo PTFE.Hiki i ka hoʻohui ʻana o PTFE ke hoʻomaikaʻi i ka hana pale ahi o ka mea.
ʻO ka Bromotriazine a me ka antimony trioxide nā mea hoʻopaʻa ahi halogen-antimony maʻamau, ʻaʻole ia e hoʻololi wale i ka hoʻololi ʻana i ka hopena o ke ahi akā hoʻololi hoʻi i ka hopena degradation thermal o ka māhele condensed.ʻO ke koena kalapona kalapona o ABS maʻemaʻe ma 700 ℃ he 1.2%, a hoʻohui ʻia ka ABS me ka brominated triazine a me antimony trioxide.ʻO ke koena kalapona kalapona ma 700 ℃ he 3.5%.ʻO ka hoʻokumuʻiaʻana o ka papa kalapona e kōkua pū i ka hoʻonuiʻana i ke kū'ē o ka mea.Ka hikiwawe.I ka manawa like, ʻo ke koena kalapona kalapona ma 700 ° C me ka PTFE i hoʻohui ʻia he 3.6%, e hōʻike ana ʻaʻole hiki i ka PTFE ke hoʻoikaika i ka hana kalapona.Hiki i ka hoʻohui ʻana o PTFE ke hoʻoikaika i kahi hoʻolālā kalapona ʻoi aku ka maikaʻi o ka insulation a me nā pale oxygen, no laila hoʻohana ʻia me ka halogen-antimony flame retardant, ʻoi aku ka maikaʻi o ka hopena o ka lapalapa ahi.
3. Ka hopena
3.1.Hiki i ka hoʻohui ʻana o PTFE ke hōʻemi hou i ka nui o ka pohō kaumaha o ka wela o ka lapalapa ahi ABS, hoʻemi nui i ka manawa kuni o ka mea, a hoʻomaikaʻi i ka papa ahi retardant o ka mea.
3.2.He liʻiliʻi ka hopena o ka hoʻohui ʻana o PTFE i nā waiwai mechanical o ke ahi retardant ABS, a ma kekahi ʻano hoʻomaikaʻi i ka paʻakikī o ka mea.
3.3.He hopena koʻikoʻi ka PTFE i ka hana ʻana o ka flame retardant ABS, a pono e hoʻoponopono ʻia ka dosage e like me nā pono i ka wā o ka hoʻohana ʻana.
Ka manawa hoʻouna: Jun-11-2020