Okugerageranya obutambuzi bw’ebbugumu n’okunyweza mu PTFE High-Temperature Adhesive Tapes

Tapi ya PTFE bwe yeetaaga okusaasaanya ebbugumu – okugeza, okusiba ekitundu ky’amasannyalaze ku sinki y’ebbugumu – oluwuzi olusiiga lulina okukola ebintu bibiri omulundi gumu: okukyusa ebbugumu n’okukwata obulungi. Okwongerako ebijjuza ebitambuza ebbugumu (alumina, boron nitride, n’ebirala) kitereeza okutambuza ebbugumu naye kumpi bulijjo kikendeeza ku kwekwata.

Okusoomoozebwa kwe kusinga okutambuza ebbugumu ate nga ofiirwa okukwatagana okutono nga bwe kisoboka . Eky’okuddamu kiri mu bipimo bisatu eby’okujjuza: obunene bw’obutundutundu, enkula y’obutundutundu, n’ebitundu ku kikumi eby’okutikka.

Aokai PTFE ekoze ekyuma ekitambuza ebbugumu PTFE tapes ezikozesebwa mu byuma bikalimagezi n’amakolero. Ekitundu kino kinnyonnyola engeri obunene bw’obutundutundu, enkula, n’okutikka gye bikosaamu okusuubulagana, n’engeri y’okukolamu bbalansi esinga obulungi.

Obunene bw’obutundutundu – Okusuubulagana okulungi-okunene

Enkula y’obutundutundu y’efuga engeri ebijjuza gye bikolamu omukutu ogutambuza ebbugumu n’engeri ekyesiiga gye kifukirira obulungi ku ngulu w’okusiba.

1. Obutoffaali obutono (nano okutuuka ku submicron) .

• Ekikolwa ky’ebbugumu: Ekitundu ekinene eky’okungulu kiviirako ebifo ebisingawo eby’okukwatagana kw’obutundutundu n’obutundutundu, naye era n’okuziyiza kw’ebbugumu okw’omu makkati okusingawo (okusaasaana kwa phonon). Okugatta okw’amaanyi kukoma ku kulongoosa mu butambuzi.

• Adhesion effect: Obutundutundu obutono bunyiga obungi bwa resin ne tackifiers, ne bikaluba adhesive. Tack esooka egwa nnyo. Okukulukuta kukendeera, okukendeeza ku kufukirira ku PTFE substrates ezirina amaanyi amatono ku ngulu → amaanyi amatono ag’okusekula.

• Ensala: Tetera kukozesebwa yokka. Ultra-fine fillers ziwa marginal thermal gain naye zisaanyaawo adhesion.

2. Obutoffaali obunene (micron okutuuka ku makumi ga microns) .

• Thermal effect: Ebifo ebikwatagana bitono naye amakubo g’okutambuza ebbugumu ssekinnoomu mawanvu. Bwe zitumbibwa okumpi ku ludda lw’obugumu bw’ekyesiiga, ziwa obutambuzi obulungi obuyita mu nnyonyi.

• Adhesion effect: Ekitundu ekitono ku ngulu kinyiga resin entono, ne kikuuma obugonvu bw’okusiiga. Naye singa obutundutundu buba buwanvu nga oba obunene okusinga oluwuzi olusiiga (mu ngeri entuufu 25-100 μm), bukaluba ku ngulu kwa ttaapu, bukendeeza ku kifo ekikola obulungi eky’okukwatagana, era ne bukola ebifo ebikuŋŋaanyizibwamu situleesi.

• Ensala: Ekozesebwa ng’amagumba agasookerwako agatambuza, naye galina okuba nga ga sayizi wansi w’obuwanvu bw’okusiiga.

3. Ekigonjoola – okutabula mu ngeri bbiri

Tabula obutundutundu obunene n’obutono ku migerageranyo egy’enjawulo. Empeke ennungi zijjuza ebituli wakati w’obutundutundu obunene, ne zituuka ku kupakinga okusinga okumpi. With the same total filler loading, bimodal grading eyongera obutundutundu contact points (better conductivity) oba, mu ngeri endala, etuuka ku target conductivity ne less total filler , okuleka more continuous resin phase okukuuma adhesion.

Aokai PTFE recommendation : Ku layeri eyeesiiga eriko obuwanvu bwa 50 μm, kozesa obutundutundu obunene obwa 20-30 μm nga butabuddwamu obutundutundu obutono obwa 1-5 μm. Enkola eno eya bimodal kye kisumuluzo ky’okutebenkeza eby’obugagga.

Enkula y’obutundutundu – Enkula Kikulu nnyo

Ebijjuza ebitali bya nkulungo bikwatagana mu kiseera ky’okusiiga n’okukala, ne bikosa obutambuzi bw’ebbugumu okuyita mu nnyonyi (Z-direction) n’okunywerera.

1. Ebijjuza ebyekulungirivu oba ebiringa ebyekulungirivu (okugeza, alumina eyeekulungirivu) .

• Ekikolwa ky’ebbugumu: Isotropic. Obutoffaali butuuma mangu okuyita mu ludda lw’obugumu, ekirungi mu kusaasaanya ebbugumu okuyita mu nnyonyi.

• Adhesion effect: Ebintu ebiseeneekerevu tebiremesa kutambula kwa resin. Akuuma okukulukuta okw’ennyogovu n’okufukirira kungulu. Mu bifaananyi byonna ku kutikka okw’enkanankana, enkulungo zisigaza okunywerera okusinga obulungi – naddala tack esooka.

• Enkizo ya bbalansi: Okukwatagana okusinga obulungi okutwalira awamu. Maximizes Z-axis thermal gain nga efiirwa okunyweza okutono.

2. Ebijjuza ebifuukuuse (okugeza, boron nitride, graphene) .

• Thermal effect: High aspect ratio egaba excellent in-plane conductivity, naye flakes align parallel to the substrate, okuwa okulongoosa okutono okuyita mu nnyonyi – mbi ku PTFE tapes ezeetaaga vertical heat transfer.

• Adhesion effect: Flakes zikola nga partition films, ziziyiza okutambula kw’obuveera era nga zisala nnyo tack esooka. Empenda ezisongovu zireeta okusengejja situleesi, ekikendeeza ku maanyi g’ebikuta.

• Obuzibu mu bbalansi: Obutakwatagana bulungi n’obwetaavu bw’ebbugumu obw’obulagirizi bwa Z, kwonoona nnyo okukwatagana okw’obuzaale. Si kirungi nga ekintu ekikulu ekijjuza.

3. Ebintu ebijjuza ebirimu ebiwuziwuzi oba ebitali bya bulijjo

• Thermal effect: High aspect ratio esobola okuzimba emikutu egitambuza ku kutikka okutono.

• Adhesion effect: Okwongera nnyo ku adhesive viscosity, okukakanyaza PSA nga oyita mu mechanical interlocking, n’okusaanyaawo tackiness. Empenda ezisongovu zoonoona enkolagana ya adhesive-PTFE.

• Ensala: Tetera kukozesebwa ng’ekijjuza ekikulu; okugattako okutonotono kwokka ng’ekintu ekiyamba okuzimba omukutu.

Filler Loading – Okuzuula ekifo ekiwooma ekiyitibwa Percolation

Nga okutikka kwa filler kweyongera, obutambuzi bw’ebbugumu bulinnya mpola mu kusooka, olwo ne bubuuka nnyo ku percolation threshold , olwo ne butuuka ku plateaus. Kyokka, okunywerera kukendeera buli kiseera.

1. Okutikka okutono (<30 vol%) .

Ebijjuza bizinga ebyawuddwamu mu matrix ya resin egenda mu maaso. Obutambuzi bw’ebbugumu bulongooka butono. Adhesion esigala kumpi ne PSA ennongoofu. Safe zone okukuuma tack, naye thermal gain tekulu.

2. Okutikka okwa wakati okutuuka ku kwa waggulu (30-60 vol%) – eddirisa erikulu

Obutoffaali butandika okukwata ne bukola amakubo agatambuza. Obutambuzi bw’ebbugumu bulinnya mu ngeri ey’ekitalo. Mu kiseera kino, matrix ya resin egenda mu maaso efuuka ya bitundutundu. Adhesive efuuka brittle; amaanyi ga tack n’okusekula okusooka bikendeera nnyo.

Eno ye zone y’okulongoosa. Ekigendererwa kwe kukola ku nkomerero eya wansi ey’omusingi gw’okukulukuta – waggulu ekimala okutuukiriza specs z’ebbugumu, wansi ekimala okukuuma omutendera gwa resin ogugenda mu maaso okusobola okunywerera okukkirizibwa.

3. Okutikka kwa waggulu nnyo (>60 vol%) .

Okupakinga obutundutundu obunene (dense particle packing) kukendeeza ku kufuna ebbugumu okusingawo (plateau). Resin tasobola kujjuza bifo byonna; voids zikola. Ekisiiga kifuuka kikalu, kikutuka, era kumpi tekikwatagana. Olutambi lufuuka firimu y’ebbugumu etali nnywevu. Bbalansi y’ebintu efiirwa ddala.

Special note for PTFE tape (silicone PSA): Silicone erina amaanyi amatono ag’okukwatagana n’okukwatagana obubi mu filler okusinga acrylic. Egumira okutikka kwa filler okusinga obunene okwa wansi. Okujjuza ekisukkiridde kireeta okufuumuuka kw’ebisiiga.

Aokai PTFE empirical data : Ku alumina ow’enkulungo mu silikoni PSA, omusingi gw’okukulukuta guli nga 35-45 vol%. Bbalansi ennungi etuukibwako around 40-45 vol% nga esaasaanyizibwa mu ngeri bbiri. Waggulu wa 55 vol%, okunywerera kufuuka okutakkirizibwa ku nkola ezisinga obungi.

Mu bufunze – Enkola y’okutebenkeza abantu basatu mu kimu

Okutuuka ku bbalansi ennywevu ey’okutambuza ebbugumu–okunyweza mu PTFE obutambi obusiiga obw’ebbugumu eringi:

1. Kozesa obutundutundu obunene obw’enkulungo (20-30 μm) ng’amagumba agasookerwako agatambuza – buwa obutambuzi obuyita mu nnyonyi nga bufiirwa okunyweza okutono.

2. Oteekamu obutundutundu obutonotono (1-5 μm) okukola engabanya ey’engeri bbiri – ejjuza ebifo, ekendeeza ku kujjuza kwonna okwetaagisa, kukuuma matrix ya resin.

3. Kuuma okutikka kw’ekijjuza kwonna ku kitundu ekya wansi-wakati eky’omusingi gw’okukulukuta (around 40-45 vol% for spherical alumina in silicone PSA).

4. Limit flaky oba fibrous fillers ku <5 wt% bwe kiba kyetaagisa n’akatono – zikola obulabe ku tack era ziwa omugaso mutono okuyita mu nnyonyi.

Ekyavaamu: Taap ya PSA etambuza ebbugumu nga mu butuufu enywerera era ewangaala.

Aokai PTFE ekola obutambi bwa PTFE obutambuza ebbugumu nga ekozesa enkola eno eya bimodal spherical filler. Tusobola okulongoosa obutambuzi bw’ebbugumu n’emitendera gy’okunyweza okusinziira ku nkola yo.

Ekisembayo Okutwala

Okulongoosa obutambuzi bw’ebbugumu mu PTFE adhesive tapes bulijjo kulwanyisa okunyweza. Okukkaanya okusinga kuva mu butundutundu obw'enkulungo + okusaasaana kwa sayizi ya bimodal + okutikka just past percolation . Weewale ebiwujjo n’ebiwuzi okuggyako ng’okusiiga kwo kwetaaga mu ngeri ey’enjawulo okutambuza mu nnyonyi era nga kusobola okugumira tack entono.

Ku kukwatagana okw’omutindo ogwa waggulu n’okusaasaanya ebbugumu, tape ya PTFE etambuza ebbugumu ye solution ekakakasiddwa. Tuukirira Aokai PTFE okufuna ensengeka ezikwatagana n’ebyetaago byo eby’ebbugumu n’okusekula.

Ebirimu eby’ekikugu ebiweereddwa... Jiangsu Aokai Ebintu Ebipya Tekinologiya Co., Ltd.

Okumanya ebikwata ku nsonga eno mu bujjuvu n’okugonjoola ebizibu eby’enjawulo ku mifaliso egy’ebbugumu erya waggulu erya PTFE, obutambi, emisipi egy’akatimba, n’ebirala:

• Mwami Guo: +86 18944819998 ye

• Mwami Liu: +86 13705266308 ye

Nga tunywerera ku bukugu n’obwesimbu, tuwa eby’okugonjoola ebirongooseddwa mu kifo kimu n’obuweereza obulowoozebwako oluvannyuma lw’okutunda.