Okukola Enzimba ya Layer Adhesive ku Wide-Temperature-Range PTFE High-Temperature Tapes

A wide-ebbugumu-range PTFE tape erina okukwatagana mu ngeri eyesigika ku -70°C (oba wansi) era n’okuwona okukwatibwa obutasalako ku 200-260°C – span esukka mu 300°C. Kino kyetaagisa enkola y’okusiiga esigala nga nnyangu awatali kulemererwa kwa kukwatagana oba okuggyibwako enkolagana (interfacial debonding) ku buli nkomerero.

Layer eyesiiga etera okuba ekyesiiga eky’enjawulo ekikwata ku puleesa ya silikoni (PSA) ekisiigiddwa ku firimu za PTFE ezikyusiddwa kungulu oba olugoye lwa fiberglass olufukiddwamu PTFE. Ekisumuluzo ky’okukola obulungi mu ddirisa ery’ebbugumu erigazi bwe lityo kiri mu kuzimba omukutu ogukyukakyuka – dizayini ekwataganya okufukirira okw’ebbugumu eritono, okuziyiza okuseeyeeya okw’ebbugumu eringi, n’okugumiikiriza okukuba kw’ebbugumu.

Aokai PTFE ekoze obutambi bwa PTFE obw’ebbugumu erigazi nga ekozesa emisingi egyogeddwako wansi. Ekiwandiiko kino kinnyonnyola ebintu bina ebikulu eby’okukola dizayini: ensengekera ya layeri ey’enkyukakyuka, ensengekera y’ebizinga by’ennyanja biphasic microstructure, gradient crosslinking, ne heat-stabilized composite fillers.

Enzimba y’oluwuzi lw’enkyukakyuka Wakati wa Substrate ne Adhesive Layer

1. Okusoomoozebwa okukulu – PTFE surface energy

PTFE erimu amaanyi amatono ennyo ku ngulu (18-20 dynes/cm). Okusiiga obutereevu eky’okusiiga kutera okusekula mu kiseera ky’okutambula kw’ebbugumu olw’emigerageranyo gy’okugaziwa kw’ebbugumu egitakwatagana – PTFE egaziwa emirundi 30-40 okusinga fiberglass.

2. Okukola ku ngulu n’okusiba (primer anchoring).

Okugonjoola kino, PTFE kungulu kuyita mu chemical etching ne sodium-naphthalene complexes oba plasma treatment okuleeta C=C double bonds ne oxygen-containing polar groups. Oluvannyuma, ekintu ekigonvu ennyo (ultra-thin dedicated silicone primer) (okugeza, ekirungo ekiyunga silane ekirimu vinyl) kisiigibwa okukola 'molecular bridge' ku nsengekera okuyita mu chemical bonding.

3. Ensengeka y’okuziyiza situleesi (stress-buffering interlayer).

Mu nsengeka ezimu, oluwuzi olw’omu makkati olwa low-modulus, high-ductility elastic (silicone eringa gel n’ebitundu ebigonvu) luteekebwa wakati w’oluwuzi olukozesebwa n’oluwuzi olukulu olw’okusiiga. Kino kinyiga okunyigirizibwa kw’ensengekera (interfacial stress) okuleetebwa enkyukakyuka ez’amaanyi ez’ebbugumu era ne kiziyiza okusitula ku mabbali g’ekyesiiga.

Enteekateeka y’ebitonde ebitonotono eby’omu nnyanja n’ebizinga

Matrix enkulu ey’okusiiga ye nkola ya PSA eya kalasi erimu MQ silicone resin (dispersed island phase) ne polysiloxane ow’obuzito bwa molekyu obw’amaanyi (continuous sea phase).

1. MQ silicone resin – ekitundu ky’ekizinga ekikalu

Ewa okukwatagana, amaanyi g’okukwata, n’okuziyiza okuseeyeeya mu bbugumu erya waggulu. Okufuga okutuufu okw’omugerageranyo gwayo ogwa M/Q molar (mu ngeri entuufu 0.6-0.9) n’okusaasaana kw’obunene bw’obutundutundu kukakasa okuteekebwa mu ngeri y’emu munda mu mutendera ogugenda mu maaso okukola ebifo eby’okusalako eby’omubiri.

2. Ekitundu kya Polysiloxane ekigenda mu maaso – ekitundu ky’ennyanja ennyogovu

Etuwa tack ey’amangu, okufukirira mu bbugumu eritono, n’okukyukakyuka. Omupiira gwa methyl vinyl silicone ogw’obuzito bwa molekyu obw’amaanyi oba methyl phenyl vinyl silicone rubber gwe gutera okulondebwa.

3. Okulongoosa okw’enjawulo ku bbugumu erigazi

biyingizibwamu Ebitundu bya siloxane ebirimu phenyl omungi . Ebibinja bya phenyl binyigiriza okufuuka ekiristaayo ekya polydimethylsiloxane mu bbugumu eri wansi, ne kikendeeza ku bbugumu ly’obuzito bw’ekisiiga wansi wa -100°C. Mu kiseera kino, ebibinja bya phenyl byongera okuziyiza okuvunda kw’ebbugumu-okwokya ku bbugumu erya waggulu, okusobozesa ekitundu ky’ennyanja ekigenda mu maaso okukuuma obugumu obw’amaanyi okuyita mu ddirisa ly’ebbugumu erigazi.

Multi-Layer oba Gradient Crosslinking Design okusobola okuziyiza okusannyalala kw’ebbugumu

Enkola y’okusiiga ey’emirundi ebiri eyitibwamu okutebenkeza obuziyiza bw’okuseeyeeya mu bbugumu erya waggulu n’okunyweza okw’ebbugumu eritono:

1. Oluwuzi olw’omunda (oludda lwa substrate) .

Relatively high crosslink density , okutuusa amaanyi amagumu agakwata ebbugumu erya waggulu n’amaanyi agakwatagana nga framework egumira okusala.

2. Oluwuzi olw’ebweru (okusiba kungulu) .

Ultra-low crosslink density ne highly mobile molecular chains, okukakasa okufukirira amangu ku adherends ku bbugumu eri wansi n’okusooka tack emala.

Ekirala, ekigerageranyo ekigenda mu maaso eky’obuzito bw’okusalasala okuva ku ludda olw’omunda okudda ku ludda olw’ebweru kikolebwa munda mu layeri emu nga kiyita mu nkola z’okuwonya, nga kigatta bulungi zoni ezikola ezikaluba era ezikyukakyuka.

Aokai PTFE ekozesa tekinologiya wa gradient crosslinking okukakasa nti olutambi lusigala nga lugonvu ku -70°C (okusobozesa okusooka okukwata n’okukwatagana) ate nga lukuuma amaanyi g’okukwatagana ku 260°C (okuziyiza okutambuza okuseeyeeya n’okusiiga).

Ebintu Ebijjuza Ebikozesebwa (Composite Fillers) Ebinyweza ebbugumu

Nano-scale fumed silic asaasaanyizibwa bulungi mu adhesive matrix okusobola okunyweza, nga egattibwa wamu n’ebika bibiri eby’ebijjuza ebikola:

1. Ebirungo ebigattibwa mu bbugumu

Cerium oxide, iron oxide, n’ebiwuka ebirala ebiyitibwa radical scavengers biziyiza okukaluba okw’okwokya (oxidative hardening) kw’enjegere z’ebbali eza siloxane n’okuvunda kw’omugongo wansi w’ebbugumu eringi. Ebirungo bino ebiziyiza obuwuka obuleeta obulwadde bwongera ku bulamu bw’okuweereza ku 260°C.

2. Ebijjuza ebitambuza ebbugumu

Micron-sized aluminium nitride, alumina , n’ebirala, zisaasaanya mangu ebbugumu okukendeeza ku kukuŋŋaanyizibwa kw’ebbugumu munda n’okukendeeza ku kukaddiwa. Kino kikulu nnyo naddala ku nkola nga tape ekozesebwa nga ensengekera y’ebbugumu oba ebbugumu okuzimba okuva mu substrate kuyinza okwanguya okuvunda kw’ekisiiga.

Fillers zonna zeetaaga surface passivation oba silane treatment okwewala modulus okulinnya okuyitiridde n’okukaluba kw’adhesive ku bbugumu eri wansi.

Mu bufunze – Omukutu ogukwatagana n’embeera ezisukkiridde

Oluwuzi olusiiga olw’obutambi bwa PTFE obw’ebbugumu erigazi mu bukulu gwe mutimbagano ogwawuddwamu microphase ogw’okugattako oguyitibwa platinum-catalyzed added with MQ resin chemical anchoring sites ne hybrid phenyl long-chain siloxanes. Okuyita mu tekinologiya wa gradient crosslinking ne co-crosslinking, egatta bulungi:

• Okufukirira amangu n’okukyukakyuka okw’amaanyi ku bbugumu eri wansi

• Okukwatagana okw’amaanyi n’okukola anti-oxidation ku bbugumu erya waggulu

...munda mu layeri emu eya elastic adhesive, okutuukiriza ebisaanyizo ebikakali eby’okusiiga eby’ebbugumu eringi.

Aokai PTFE ekola obutambi bwa PTFE obw’ebbugumu erigazi nga ekozesa dizayini eno ey’enkola y’okusiiga. Ebikwata ku butonde – omuli obuwanvu, crosslink gradient, n’okutikka filler – biriwo ku byetaago ebitongole eby’okukozesa.

Ekiwandiiko kino eky’ekikugu kiweereddwa... Jiangsu Aokai Ebintu Ebipya Tekinologiya Co., Ltd.

Bw’oba oyagala okuyiga ebikwata ku nsonga enzijuvu, embeera z’okukozesa n’ebigonjoola ebikoleddwa ku mutindo gw’ebintu byaffe ebijjuvu, omuli emifaliso egy’ebbugumu erya waggulu erya PTFE, obutambi obusiiga PTFE, emisipi egy’akatimba egya PTFE, emisipi gy’ekyuma ekifuyira ekitaliiko musonno, olugoye olusiigiddwa PTFE olw’oludda olumu, emisipi egy’okutambuza egigumira ebbugumu eringi n’emifaliso egya fiberglass egy’ebbugumu eringi, tukusaba otuukirire ng'oyita ku mikutu gino wammanga:

• Mwami Guo: +86 18944819998 ye

• Mwami Liu: +86 13705266308 ye

Tunywerera ku ndowooza y’obuweereza ey’obukugu n’obwesimbu, nga twewaddeyo okukuwa eby’okugonjoola ebijjuvu mu kifo kimu n’obuwagizi obulowoozebwako!