No ke aha e hiki ai i ka PTFE ke hoʻopaʻa i kona hoʻopili ʻana me ka ʻole o ka hāʻule ʻole i nā kaiapuni kiʻekiʻe?

ʻO ka PTFE kiʻekiʻe-mehana lipine i hanaʻia e Jiangsu Aokai New Materials e hoʻohana i ka silicone pressure-sensitive adhesive, hiki ke hana paʻa ma 250 ° C no ka manawa lōʻihi. Aia nā kumu kumu ma nā kumu ʻekolu:

1. Aia ke kaulahao nui i na paa Si–O me ka wela wela wela

ʻO ke kaulahao molecular nui o ka silicone pressure-sensitive adhesive ma PTFE kiʻekiʻe-mehana lipine he ʻano Si O Si O. ʻO ka ikehu paʻa o ka paʻa Si–O ma kahi o 445 kJ/mol, ʻoi aku ka kiʻekiʻe ma mua o ka paʻa C–C (ma kahi o 348 kJ/mol) a i ʻole ka paʻa C–H (ma kahi o 413 kJ/mol) i loko o nā polymers organik maʻamau e like me nā acrylates a me nā rubbers.

I nā wela kiʻekiʻe, ʻoi aku ka maʻalahi o ka haki ʻana o nā paʻa C-C a hoʻomaka i ka hoʻohaʻahaʻa ʻana i ke kaulahao, akā ʻo nā paʻa Si-O e koi i ka ikehu kiʻekiʻe aʻe e haki. No laila, paʻa mau ke kaulahao nui o ka silicone PSA ma 250 ° C, e pale ana i ka nalowale o ka adhesion i hana ʻia e ka thermal-oxidative degradation.

2. Kāohi ʻia ʻo Chemical Cross-Linking Network i ka palupalu a me ke kahe ʻana ma nā wela kiʻekiʻe

Lilo ka lāʻau silicone uncrosslinked i wai ʻeleʻele i nā wela kiʻekiʻe a nalowale loa ka ikaika cohesive. Eia nō naʻe, ua hoʻopili ʻia ka silicone PSA ma PTFE kiʻekiʻe-mehana lipine ma o ka peroxide crosslinking a i ʻole ka platinum-catalyzed hoʻohui crosslinking, e hoʻopili ana i nā kaulahao molekala laina i loko o kahi pūnaewele paʻa ʻekolu-dimensional.

Hāʻawi kēia ʻano crosslinked i ka papa adhesive e mālama i ka ʻano elastic paʻa ma 250 ° C me ka hoʻoheheʻe ʻole a kahe ʻole e like me nā mea thermoplastic. ʻOiai me ka emi iki ʻana o ka modulus, e paʻa mau ana ka ikaika cohesive e pale aku i ka ʻili.

3. Ka Mahana Hoʻololi Aniani Haʻahaʻa (Tg ~ −120°C)

He haʻahaʻa loa ka Tg (ma kahi o −120°C) o ka silicone PSA ma PTFE kiʻekiʻe-mehana lipine, ʻo ia hoʻi, e mau ana kona mau kaulahao mole i loko o kahi kūlana elastic nui ma kahi ākea ākea mai −70°C a i 300°C, ma mua o kahi moku aniani brittle.

No laila, i nā wela kiʻekiʻe, ʻaʻole paʻakikī ka papa hoʻopili e nalowale i ka hiki ke hoʻomaʻemaʻe a ʻaʻole hoʻi e palupalu i ka kahe nui. Mālama ʻo ia i kahi modulus haʻahaʻa (modulus mālama G' ≈ 10⁴–10⁶ Pa), ʻo ia ka puka aniani maikaʻi loa no ka hoʻopili ʻana i ka puʻuwai.

ʻO ka Silicone PSA ponoʻī ka ikehu haʻahaʻa haʻahaʻa (ma kahi o 22 mN/m), hiki iā ia ke hoʻomaʻemaʻe i nā substrates haʻahaʻa haʻahaʻa e like me ka PTFE a me ka silicone rubber me ka maikaʻi ma nā wela kiʻekiʻe - pale i ka debonding ma muli o ka maikaʻi ʻole o ka ikehu o ka ʻili.

Hāʻawi ʻia ka ʻike ma luna e Jiangsu Aokai New Materials Technology Co., Ltd.

No nā palena kikoʻī, nā hiʻohiʻona noiʻi a me nā hoʻonā i hoʻopili ʻia o kā mākou huahana piha - me ka PTFE kiʻekiʻe-mehana lole, PTFE kiʻekiʻe-mehana tape, PTFE kiʻekiʻe wela mesh kāʻei, seamless kāʻei no nā mīkini laminating, ʻaoʻao hoʻokahi PTFE lole, kiʻekiʻe-mehana kūpaʻa kūpaʻa kāʻei conveyor a me ka wela kiʻekiʻe fiberglass lole:

·  Laina Hotline: Mr. Guo 18944819998 Mr. Liu 13705266308

E pili ana i ka filosofia lawelawe o ka ʻoihana a me ka pololei, ua hoʻolaʻa mākou i ka hāʻawi ʻana iā ʻoe i nā hopena hoʻokahi a me ka lawelawe hoʻolohe!