Ho leka-lekanya Thermal Conductivity le Adhesion ho PTFE High-Temperature Adhesive Tapes

Ha tepi ea PTFE e hloka ho senya mocheso - ka mohlala, ho kopanya karolo ea matla ho mocheso oa mocheso - lera la sekhomaretsi le tlameha ho etsa lintho tse peli ka nako e le 'ngoe: ho fetisa mocheso le ho tšoara ka thata. Ho eketsa li-fillers tsa thermally conductive (alumina, boron nitride, joalo-joalo) ho ntlafatsa conductivity ea mocheso empa hoo e ka bang kamehla ho fokotsa ho khomarela.

Phephetso ke ho eketsa phetiso ea mocheso ha o ntse o lahleheloa ke ho khomarela hanyane kamoo ho ka khonehang . Karabo e ka har'a liparamente tse tharo tsa li-filler: boholo ba karoloana, sebopeho sa karoloana, le peresente ea ho kenya.

Aokai PTFE e hlahisitse thermally conductive Litheipi tsa PTFE tsa lisebelisoa tsa elektroniki le tsa indasteri. Sengoliloeng sena se hlalosa hore na boholo ba likaroloana, morphology, le ho jara li ama khoebo joang, le mokhoa oa ho etsa hore ho be le tekanyo e ntle ka ho fetisisa.

Boholo ba Particle - The Fine-Coarse Trade-Off

Boholo ba likaroloana bo laola hantle hore na li-filler li theha marang-rang a tsamaisang mocheso hantle hakae le hore na sekhomaretsi se kolobisa bokaholimo bo tlamang.

1. Likaroloana tse ntle (nano ho submicron)

• Phello ea mocheso: Sebaka se phahameng se lebisa ho lintlheng tse ngata tsa ho kopana le likaroloana, empa hape le ho hanyetsa mocheso oa sefahleho (ho hasana ha phonon). Agglomeration e matla e fokotsa ntlafatso ea conductivity.

• Adhesion effect: Likaroloana tse ntle li monya resin e ngata le li-tackifiers, li thatafatsa sekhomaretsi. Lebelo la pele le theoha haholo. Ho phalla hoa fokotseha, ho fokotsa ho koloba ho li-substrates tsa PTFE tse tlaase-tlase → matla a tlaase a peel.

• Qeto: Ha e sebelisoe hangata u le mong. Li-filler tse ntle haholo li fana ka phaello e tlase ea mocheso empa li senya ho khomarela.

2. Likaroloana tse mahoashe (micron ho isa ho mashome a microns)

• Thermal effect: Libaka tse fokolang tsa ho kopana empa litsela tse telele tsa ho tsamaisa mocheso. Ha li phuthetsoe haufi-ufi haufi le tataiso ea botenya ba sekhomaretsi, li fana ka conductivity e ntle ea sefofane.

• Tšusumetso ea ho khomarela: Sebaka se tlase se hlahisa resin e nyane, e boloka bonolo ba sekhomaretsi. Leha ho le joalo, haeba likaroloana li le botenya kapa li le boima ho feta lesela la sekhomaretsi (hangata 25-100 μm), li senya bokaholimo ba tepi, li fokotsa sebaka se sebetsang hantle sa ho kopanya, 'me li theha lintlha tsa khatello ea maikutlo.

• Qeto: E sebelisoa e le skeleton ea mantlha ea conductive, empa e tlameha ho ba boholo bo ka tlase ho botenya ba sekhomaretsi.

3. Tharollo - ho kopanya bimodal

Kopanya likaroloana tse mahoashe le tse ntle ka likarolo tse khethehileng. Lithollo tse ntle li tlatsa li-voids pakeng tsa likaroloana tse mahoashe, li finyella ho paka haufi-ufi. Ka kakaretso e ts'oanang ea ho tlatsa li-filler, boemo ba li-bimodal bo eketsa lintlha tsa ho ikopanya le likaroloana (conductivity e betere) kapa, ka tsela e 'ngoe, e fihla ho sepheo se nang le li-filler tse fokolang , ho siea karolo e tsoelang pele ea resin ho boloka ho khomarela.

Khothaletso ea Aokai PTFE : Bakeng sa sekhomaretsi sa 50 μm se teteaneng, sebelisa likaroloana tse mahoashe tsa 20-30 μm tse kopantsoeng le likaroloana tse ntle tsa 1-5 μm. Mokhoa ona oa bimodal ke senotlolo sa ho leka-lekanya thepa.

Particle Morphology - Sebopeho se na le Taba Haholo

Li-fillers tse se nang spherical li lumellana nakong ea ho roala le ho omisa, tse amang ka sefofane (Z-direction) conductivity ea mocheso le ho khomarela.

1. Li-filler tse chitja kapa tse quasi-spherical (mohlala, alumina e chitja)

• Phello ea mocheso: Isotropic. Lichelete li koloana habonolo ho latela tsela e botenya, li loketse ho qhala mocheso ka sefofaneng.

• Matla a ho khomarela: Libaka tse boreleli ha li sitise ho phalla ha resin. E boloka phallo e batang le ho koloba ha bokaholimo. Har'a libopeho tsohle ka ho laela ka ho lekana, li-sphere li boloka ho khomarela hantle - haholo-holo tack ea pele.

• Molemo oa ho leka-lekana: Tšebelisano e ntle ka ho fetisisa ka kakaretso. E eketsa phaello ea mocheso oa Z-axis ka tahlehelo e nyane ea ho khomarela.

2. Li-fillers tse senyehileng (mohlala, boron nitride, graphene)

• Phello ea mocheso: Karo-karolelano e phahameng e fana ka conductivity e ntle ka ho fetisisa sefofaneng, empa li-flakes li tsamaisana le karolo e ka tlaase, li fana ka ntlafatso e fokolang ea sefofaneng - e futsanehile bakeng sa litheipi tsa PTFE tse hlokang mocheso o otlolohileng.

• Phello ea ho khomarela: Li-flakes li sebetsa joalo ka lifilimi tsa karohano, li thibela phallo ea polasetiki le ho theola boima ba pele haholo. Methapo e bohale e baka khatello ea maikutlo, e fokotsa matla a peel.

• Khaello ea ho leka-lekana: E sa lekana hantle bakeng sa litlhoko tsa mocheso oa Z-direction, e sitisa ho khomarela ka tlhaho. Ha e khothalletsoe e le setsi se seholo sa ho tlatsa.

3. Li-fibrous kapa li-filler tse sa tloaelehang

• Phello ea mocheso: Karo-karolelano e phahameng e ka haha ​​​​marang-rang a tsamaisang ha a laeloa tlaase.

• Matla a Adhesion: Eketsa viscosity ea sekhomaretsi haholo, e thatafatsa PSA ka ho hokahana ka mochini, le ho senya boits'oaro. Mehato e bohale e senya sebopeho sa sekhomaretsi-PTFE.

• Qeto: Ha e sebelisoe ka seoelo e le setsi sa mantlha; keketso e nyane feela joalo ka lisebelisoa tse thusang tsa borokho.

Filler Loading - Ho Fumana Percolation Sweet Spot

Ha phallo ea li-filler e ntse e eketseha, conductivity ea mocheso e nyoloha butle qalong, ebe e tlola ka matla moeling oa percolation , ebe e ea lihlabeng. Leha ho le joalo, ho khomarela ho fokotseha ho sa khaotse.

1. Palo e tlase (<30 vol%)

Li-filler ke lihlekehleke tse arohaneng ka har'a matrix a resin e tsoelang pele. Thermal conductivity e batla e ntlafala. Ho khomarela ho lula haufi le PSA e hloekileng. Sebaka se sireletsehileng bakeng sa ho boloka li-tack, empa phaello ea mocheso ha e na thuso.

2. Ho jara ho tloha bohareng ho isa holimo (30-60 vol%) - fensetere ea bohlokoa

Likokoana-hloko li qala ho ama le ho theha litsela tsa conductive. Thermal conductivity e nyoloha ka sekhahla. Ho sa le joalo, matrix a resin a tsoelang pele a arohana. Sekgomaretsi se fetoha brittle; lebelo la pele le matla a peel a theoha haholo.

Sena ke sebaka sa optimization. Sepheo ke ho sebetsa karolong e ka tlaase ea moeli oa percolation - e phahameng ka ho lekaneng ho finyella lintlha tsa mocheso, tse tlaase ho lekana ho boloka karolo e tsoelang pele ea resin bakeng sa ho khomarela ho amohelehang.

3. Ho roala holimo haholo (>60 vol%)

Ho paka likaroloana tse teteaneng ho liehisa phaello e eketsehileng ea mocheso (plateau). Resin e ke ke ea tlatsa likheo tsohle; sebopeho sa voids. Sekhomaretsi se fetoha se omeletseng, se pshatleha, 'me se batla se sa tsitsa. Theipi e fetoha filimi e chesang ea mocheso. Tekanyo ea thepa e lahleha ka ho feletseng.

Tlhokomeliso e khethehileng bakeng sa tepi ea PTFE (silicone PSA): Silicone e na le matla a tlaase a ho kopanya le ho lumellana ha li-filler ho feta acrylic. E mamella ho tlatsoa ha li-filler tse tlase. Ho tlatsa haholo ho baka sekhomaretsi pulverization.

Aokai PTFE empirical data : Bakeng sa alumina e chitja ka har'a silicone PSA, moeli oa percolation o batla o le 35-45 vol%. Tekanyo e nepahetseng e fihlelleha ho pota 40-45 vol% ka kabo ea bimodal. Ka holimo ho 55 vol%, ho khomarela ho fetoha ho sa amoheleheng bakeng sa lisebelisoa tse ngata.

Kakaretso – The Three-in-One Bancing Foromo

Ho fihlella tekano e tsitsitseng ea ho tsamaisa mocheso-ho khomarela litheipi tsa PTFE tse nang le mocheso o phahameng oa mocheso:

1. Sebelisa likaroloana tsa spherical coarse (20-30 μm) e le skeleton ea mantlha ea conductive - li fana ka conductivity ka sefofane ka tahlehelo e fokolang ea ho khomarela.

2. Eketsa likaroloana tse ntle (1-5 μm) ho theha kabo ea li-bimodal - ho tlatsa li-voids, ho fokotsa ho tlatsa ho hlokahalang, ho boloka matrix a resin.

3. Boloka kakaretso ea li-filler sebakeng se tlase-bohareng sa moeli oa percolation (hoo e ka bang 40-45 vol% bakeng sa alumina e chitja ho silicone PSA).

4. Fokotsa li-fibrous fillers ho <5 wt% haeba ho hlokahala ho hang - li ntša kotsi 'me li fana ka melemo e fokolang ka sefofaneng.

Sephetho: Theipi e tsamaisang mocheso ea PSA e khomarelang le ho tšoarella.

Aokai PTFE e etsa litheipi tsa PTFE tse tsamaisang mocheso ka ho sebelisa leano lena la bimodal spherical filler. Re ka fetola maemo a mocheso le ho khomarela ho latela kopo ea hau.

Ntho ea ho Qetela

Ho ntlafatsa conductivity ea mocheso ho litheipi tsa sekhomaretsi tsa PTFE kamehla li loantšana le ho khomarela. Tekanyetso e ntle ka ho fetisisa e tsoa ho likaroloana tse chitja + kabo ea boholo ba bimodal + ho kenya percolation e fetileng . Qoba li-flakes le likhoele ntle le haeba sesebelisoa sa hau se hloka conductivity ea sefofaneng 'me se ka mamella tack e tlase.

Bakeng sa tlamahano e phahameng ea ts'ebetso le ho felloa ke mocheso, tepi ea PTFE e tsamaisang mocheso ke tharollo e netefalitsoeng. Ikopanye le Aokai PTFE bakeng sa litlolo tse tsamaellanang le litlhoko tsa hau tsa mocheso le peel.

Litaba tsa tekheniki tse fanoeng ke Jiangsu Aokai New Materials Technology Co., Ltd.

Bakeng sa lintlha tse qaqileng le litharollo tsa tloaelo bakeng sa masela a mocheso o phahameng oa PTFE, litheipi, mabanta a marang-rang, le tse ling:

• Mong. Guo: +86 18944819998

• Mong. Liu: +86 13705266308

Ho latela boits'oaro le bots'epehi, re fana ka litharollo tse ikhethileng tsa sebaka se le seng le lits'ebeletso tse nahanang ka mor'a thekiso.