Temperature-range zau tak a ni PTFE tape hian -70°C (a hnuai lam)-ah rintlak takin a bond tur a ni a, 200-260°C-ah – 300°C aia span-ah a awm chhunzawm zel chuan a dam khawchhuak tur a ni. Hei hian adhesive system a mamawh a, chu chu cohesive failure emaw interfacial debonding emaw awm lovin a flexible reng a ni.
Adhesive layer hi a tlangpuiin silicone pressure-sensitive adhesive (PSA) bik, surface-modified PTFE film emaw PTFE-impregnated fiberglass fabric emaw-a khuh a ni. Chutiang temperature window zau takah chuan stable performance neih theihna tur kawng pawimawh tak chu adaptive network siam a ni – hei hi low-temperature wetting, high-temperature creep resistance, leh thermal shock tolerance te balance thei design a ni.
Aokai PTFE hian a hnuaia principle tarlan hmang hian wide-temperature PTFE tape an siam a. He thuziak hian core design element pali a sawifiah a, chungte chu transition layer structure, sea-island biphasic microstructure, gradient crosslinking, leh heat-stabilized composite fillers te an ni.
Substrate leh Adhesive Layer inkara Transition Layer Structure awm dan
1. Harsatna pawimawh ber – PTFE lei chung chakna
PTFE hian surface energy (18-20 dynes/cm) a nei tlem hle. Adhesive direct coating hian thermal cycling laiin thermal expansion coefficient inmil lo vangin a peel off duh hle – PTFE hian fiberglass aiin 30-40x in a expand tam zawk.
2. Surface activation leh primer anchoring tih te
Hei hi chinfel nan PTFE chunglam chu chemical etching emaw sodium-naphthalene complex hmangin plasma treatment emaw hmangin C=C double bonds leh oxygen-containing polar groups te dah luh a ni. Chumi hnuah chuan ultra-thin dedicated silicone primer (eg, vinyl-containing silane coupling agent) hmangin chemical bonding hmangin interface-ah 'molecular bridge' siam a ni.
3. Stress-buffering interlayer a awm thin
Formulation thenkhatah chuan activated layer leh main adhesive layer inkarah hian low-modulus, high-ductility elastic intermediate layer (gel ang chi silicone with flexible segments) dah a ni. Hei hian temperature inthlak danglamna nasa tak avanga interfacial stress lo awm chu a absorb a, adhesive edge lifting a veng bawk.
Tuipui leh thliarkar Biphasic Microstructure chungchanga dan siam
Adhesive matrix ber chu classic PSA system a ni a, MQ silicone resin (dispersed island phase) leh high-molecular-weight polysiloxane (continuous sea phase) te a awm a ni.
1. MQ silicone resin – thliarkar harsa tak phase
Cohesion, holding power, leh temperature sang takah creep resistance a pe. A te chiang taka control hian M/Q molar ratio (a tlangpuiin 0.6-0.9) leh particle size dispersion continuous phase chhungah uniform embedding a siam a, physical crosslinking sites a siam thei a ni.
Tack rang tak, low-temperature wettability, leh flexibility a pe chhuak. Molecular-weight sang tak methyl vinyl silicone rubber emaw methyl phenyl vinyl silicone rubber emaw thlan a ni tlangpui.
3. Temperature range zau tak atan special optimization
tlemte Phenyl tamna siloxane segment a tel bawk. Phenyl group hian polydimethylsiloxane temperature hniam taka crystallization a titawp a, adhesive brittleness temperature chu -100°C hnuaiah a tihhniam a ni. Hetihlai hian phenyl groups hian temperature sang takah thermal-oxidative degradation resistance a tichak a, hei hian continuous sea phase chu temperature window zau takah elasticity sang tak a vawng reng thei a ni.
Thermal Shock laka invenna atan Multi-Layer emaw Gradient Crosslinking Design hmanga siam a ni
High-temperature creep resistance leh low-temperature tackiness balance turin double-layer coating process hman a ni a:
1. A chhung lam (substrate lam) .
. Crosslink density sang tak , shear-resistant framework angin high-temperature holding power chak tak leh cohesive strength pe thei
2. Pawn lam layer (bonding surface) 1.1.
Ultra-low crosslink density neiin mobile molecular chain sang tak a nei a, temperature hniam takah adherends-ah wetting rang tak leh initial tack tling tak a awm theih nan.
A dang pawhin, continuous gradient siam a ni a, rigid leh flexible functional zone te chu seamless takin a inzawm khawm a ni. crosslink density curing process hmangin layer pakhat chhungah
Aokai PTFE hian gradient crosslinking technology hmangin tape chu -70°C-ah a flexible reng theih nan (initial tack leh conformability a siam thei) a, chutih rualin 260°C-ah cohesive strength a vawng reng bawk (creep leh adhesive transfer a veng thei bawk).
Heat-Stabilized Composite Fillers hmanga siam a ni
Nano-scale fumed silica chu adhesive matrix-ah reinforcement atan a tha zawngin a theh darh a, functional filler category pahnih nen a inzawm khawm a ni:
1. Additives lumna do thei
Cerium oxide, iron oxide leh radical scavenger dangte hian siloxane side chain te oxidative hardening leh backbone degradation te chu lumna nasa tak hnuaiah a titawp a ni. Heng antioxidant te hian 260°C ah service life a ti rei zawk a ni.
2. Thermal conductive fillers hmanga siam a ni
Micron-sized aluminum nitride, alumina , etc. te hian lumna chu rang takin a ti bo a, chu chuan chhungril lama lumna a khawlkhawm a ti tlem a, tar a ti hniam bawk. Hei hi tape hi thermal interface atana hman emaw, substrate atanga heat build-up-in adhesive degradation a ti chak thei tihna application-ah a pawimawh hle.
Filler zawng zawng hian surface passivation emaw silane treatment emaw a mamawh vek a ni. modulus sang lutuk leh temperature hniam takah adhesive hardening lutuk lo turin
Thupui – Thil awmdan khauh tak takte tana Adaptive Network
Wide-temperature-range PTFE tape-a adhesive layer hi a bul berah chuan platinum-catalyzed addition crosslinking microphase-separated network a ni a, MQ resin chemical anchoring site leh hybrid phenyl long-chain siloxanes te nen embedded a ni. Gradient crosslinking leh co-crosslinking technology hmangin a inzawm khawm tha hle a ni:
Rapid wetting leh temperature hniam takah pawh flexibility sang tak a nei
Cohesion chak tak leh temperature sang takah anti-oxidation performance a nei tha hle
...elastic adhesive layer pakhat chhungah, wide-temperature-range application requirement khauh tak tak phuhruk thei.
Aokai PTFE hian he adhesive system design hmang hian temperature zau tak PTFE tape an siam thin. Custom specification – thickness, crosslink gradient, leh filler loading te pawh a tel – application mamawh bik atan a awm bawk.
