ʻO kahi ākea-mahana-launa Pono ka lipine PTFE e hoʻopaʻa hilinaʻi ma -70°C (a i ʻole lalo) a ola i ka hoʻolaha mau ʻana ma 200-260°C – ʻoi aku ka lōʻihi o 300°C. Ke koi nei kēia i kahi ʻōnaehana hoʻopili e hoʻomau i ka maʻalahi me ka ʻole o ka paʻa ʻole a i ʻole ka debonding interfacial i kēlā me kēia kiʻekiʻe.
ʻO ka ʻāpana adhesive ka mea maʻamau he silicone pressure-sensitive adhesive (PSA) kūikawā i uhi ʻia ma luna o nā kiʻi ʻoniʻoni PTFE i hoʻololi ʻia i ka ʻili a i ʻole PTFE-impregnated fiberglass fabric. ʻO ke kī i ka hana paʻa ma kēlā puka aniani ākea e pili ana i ke kūkulu ʻana i kahi pūnaewele adaptive - kahi hoʻolālā e kaulike ana i ka pulu haʻahaʻa haʻahaʻa, ke kūpaʻa kiʻekiʻe o ka wela, a me ka hoʻomanawanui haʻalulu.
Ua hoʻomohala ʻo Aokai PTFE i nā lipine PTFE ākea me ka hoʻohana ʻana i nā loina i wehewehe ʻia ma lalo nei. Hōʻike kēia ʻatikala i nā mea hoʻolālā kumu ʻehā: ka hoʻolālā papa hoʻololi, ka microstructure biphasic moana-island, gradient crosslinking, a me nā mea hoʻopiha i hoʻopaʻa ʻia i ka wela.
Hoʻolālā Layer Transition ma waena o ka Layer adhesive
1. ʻO ke kī nui - PTFE ikehu ili
Hōʻike ka PTFE i ka ikehu haʻahaʻa loa (18-20 dynes/cm). ʻO ka hoʻopili pololei ʻana o ka mea hoʻopili e hoʻoneʻe ʻia i ka wā kaʻa kaʻa wela ma muli o ka like ʻole o nā coefficients hoʻonui wela - hoʻonui ʻia ka PTFE 30-40x ma mua o ka fiberglass.
2. Ka ho'ā 'ana i luna a me ka heleuma mua
No ka hoʻoponopono ʻana i kēia, ʻia ka ʻili PTFE hoʻopaʻa me ka paʻakikī sodium-naphthalene a i ʻole ka lāʻau plasma e hoʻolauna i nā paʻa pālua C=C a me nā hui polar i loaʻa i ka oxygen. Ma hope iho, hoʻohana ʻia kahi mea hoʻolaʻa silikoni i hoʻolaʻa ʻia (e laʻa, vinyl-containing silane coupling agent) i mea e hana ai i 'alahaka molekalale' ma ke kikowaena ma o ka hoʻopili kemika.
3. Stress-buffering interlayer
I loko o kekahi mau hana, hoʻokomo ʻia kahi papa haʻahaʻa haʻahaʻa, kiʻekiʻe-ductility elastic intermediate layer (gel-like silicone me nā ʻāpana flexible) ma waena o ka papa hana a me ka papa hoʻopili nui. Hoʻopili kēia i ke koʻikoʻi interfacial i hoʻoulu ʻia e ka piʻi ʻana o ka wela a pale i ka hoʻokiʻekiʻe ʻana o ka mea hoʻopili.
Kai-Island Biphasic Microstructure Regulation
ʻO ka matrix adhesive nui kahi ʻōnaehana PSA maʻamau i loaʻa i ka MQ silicone resin (ka moku moku i hoʻopuehu ʻia) a me ka polysiloxane kiʻekiʻe-molecular-weight (ke kai hoʻomau).
1. MQ silicone resin - pae moku paʻakikī
Hāʻawi i ka cohesion, ka paʻa ʻana i ka mana, a me ke kūpaʻa creep wela kiʻekiʻe. ʻO ka mana pololei o kāna lākiō molar M/Q (maʻamau 0.6-0.9) a me ka hoʻopuehu nui ʻana e hōʻoia i ka hoʻokomo like ʻana i loko o ke kaʻina hoʻomau e hana i nā pūnaewele crosslinking kino.
2. ʻO Polysiloxane ka manawa mau - ke kai palupalu
Hāʻawi i ka wikiwiki wikiwiki, haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa, a me ka maʻalahi. ʻO ka methyl vinyl silicone rubber a i ʻole methyl phenyl vinyl silicone rubber ka mea maʻamau i koho ʻia.
3. Hoʻoponopono kūikawā no ka laulā wela
kahi ʻāpana liʻiliʻi o nā ʻāpana siloxane kiʻekiʻe-phenyl-content . Hoʻokomo ʻia Kāohi nā pūʻulu Phenyl i ka crystallization haʻahaʻa haʻahaʻa o polydimethylsiloxane, e hoʻohaʻahaʻa ana i ka mahana brittleness o ka adhesive ma lalo o -100°C. I kēia manawa, hoʻoikaika nā hui phenyl i ka pale ʻana i ka thermal-oxidative degradation i nā wela kiʻekiʻe, e hiki ai i ke kai hoʻomau ke mālama i ka elasticity kiʻekiʻe ma kahi puka aniani ākea.
ʻO ka hoʻolālā Multi-Layer a i ʻole Gradient Crosslinking Design for Thermal Shock Resistance
Hoʻohana ʻia kahi kaʻina hana uhi pālua e hoʻohālikelike i ke kūpaʻa kiʻekiʻe-mehana a me ka haʻahaʻa haʻahaʻa haʻahaʻa.
1. Papa loko (ʻaoʻao substrate)
ʻO ke kiʻekiʻe kiʻekiʻe o ka crosslink density , e hāʻawi ana i ka mana paʻa wela kiʻekiʻe a me ka ikaika paʻa e like me ke ʻano shear-resistant framework.
2. Papa waho (ka hoʻopaʻa ʻana)
ʻO ka mānoanoa crosslink ultra-haʻahaʻa me nā kaulahao molecular mobile loa, e hōʻoiaʻiʻo ana i ka pulu wikiwiki ʻana ma luna o nā haʻahaʻa haʻahaʻa a lawa ka hoʻopaʻa mua.
ʻO kahi ʻē aʻe, hoʻokumu ʻia kahi mau o ka crosslink density gradient mai loko a i waho i loko o kahi papa hoʻokahi ma o nā kaʻina hana hoʻōla, hoʻohui pono i nā ʻāpana hana paʻa a maʻalahi.
Hoʻohana ʻo Aokai PTFE i ka ʻenehana crosslinking gradient e hōʻoia i ka paʻa ʻana o ka lipine ma -70 ° C (e hiki ai ke hoʻopaʻa mua a me ka conformability) ʻoiai e mālama ana i ka ikaika cohesive ma 260 ° C (pale i ka creep and adhesive transfer).
Nā Mea Hoʻopiha Hui Pū ʻIa Hoʻopaʻa Wela
Hoʻopuehu maikaʻi ʻia ka silica fumed nano-scale i loko o ka matrix adhesive no ka hoʻoikaika ʻana, i hui pū ʻia me ʻelua ʻano o nā mea hoʻopiha hana:
1. Nā mea hoʻohui wela
ʻO ka Cerium oxide, iron oxide, a me nā mea hoʻomaʻemaʻe radical ʻē aʻe e kāohi i ka paʻakikī o ka ʻokiʻoki ʻana o nā kaulahao ʻaoʻao siloxane a me ka hōʻino ʻana o ka iwi kuamoʻo ma lalo o ka wela nui. Hoʻonui kēia mau antioxidants i ke ola lawelawe ma 260 ° C.
2. Nā mea hoʻopihapiha hoʻopihapiha wela
ʻO ka micron-sized aluminum nitride, alumina , a me nā mea'ē aʻe, e hoʻopau wikiwiki i ka wela e hōʻemi i ka hōʻiliʻili wela o loko a hoʻolohi i kaʻelemakule. He mea koʻikoʻi kēia no nā noi kahi i hoʻohana ʻia ai ka lipine ma ke ʻano he mea wela a i ʻole kahi e hoʻoulu ai ka wela mai ka substrate e hoʻolalelale i ka hoʻohaʻahaʻa ʻana.
Pono nā mea hoʻopiha āpau i ka passivation o ka ʻili a i ʻole ka mālama silane e pale i ka piʻi ʻana o ka modulus nui a me ka paʻakikī paʻa i nā wela haʻahaʻa.
Hōʻuluʻulu Manaʻo - He Pūnaewele Hoʻololi no nā Kūlana Loa
ʻO ka papa hoʻopaʻa o nā lipine PTFE ākea ākea he mea hoʻohui platinum-catalyzed crosslinking microphase-separated network i hoʻopili ʻia me nā kahua hele kemika resin MQ a me nā hybrid phenyl long-chain siloxanes. Via gradient crosslinking a me co-crosslinking ʻenehana, hoʻohui pono ia:
ʻO ka pulu wikiwiki a me ka loli kiʻekiʻe i nā mahana haʻahaʻa
ʻO ka hoʻohui ikaika a me ka hana anti-oxidation ma nā wela kiʻekiʻe
...i loko o kahi papa hoʻopili elastic hoʻokahi, e hoʻokō i nā koi noi noi ākea ākea.
Hana ʻo Aokai PTFE i nā lipine PTFE ākea me ka hoʻohana ʻana i kēia hoʻolālā ʻōnaehana adhesive. Loaʻa nā kikoʻī kikoʻī - me ka mānoanoa, crosslink gradient, a me ka hoʻopiha piha - loaʻa no nā pono noi kikoʻī.
Inā makemake ʻoe e aʻo i nā kikoʻī kikoʻī, nā hiʻohiʻona noiʻi a me nā hoʻoponopono maʻamau no kā mākou laina huahana piha, me ka PTFE kiʻekiʻe-mehana lole, PTFE adhesive lipine, PTFE mesh conveyor kāʻei, seamless fusing mīkini kāʻei, hoʻokahi ʻaoʻao PTFE uhi lole, kiʻekiʻe-mehana kūpaʻa kūpaʻa kāʻei conveyor a me nā kiʻekiʻe wela e hoʻokaʻaʻike mai iā mākou ma o ke kahawai fiberglass.
Hoʻopili mākou i ka filosofia lawelawe o ka ʻoihana a me ka kūpaʻa, hoʻolaʻa ʻia i ka hāʻawi ʻana iā ʻoe i nā hoʻonā piha piha hoʻokahi a me ke kākoʻo noʻonoʻo!
