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 a rawn lut 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 groups hian polydimethylsiloxane temperature hniam taka crystallization chu 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 khaw lum nasa tak hnuaiah an titawp a ni. Heng antioxidant te hian 260°C ah service life an 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 chu 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.
