Freezer-ah tape pangngai hman i tum tawh em? A nghet lo va, a stickiness a hloh a, a ben chuan a crack bawk. Tan PTFE high-temperature tape, temperature hniam hmuna hman thin – cold storage atanga cryogenic pipeline thlengin – adhesive’s glass transition temperature (Tg) hian danglamna zawng zawng a siam vek a ni.
Silicone pressure-sensitive adhesive hian Tg a hniam hle a, -120°C vel a ni . Hei hi PTFE tape hi -70°C thlenga temperature hniam takah pawh a flexible leh adhesive reng chhan thup a ni.
Aokai PTFE hian he property hi nasa takin a zirchiang tawh a ni. He thuziak hian Tg hnuaia science awm dan leh khaw lum laia tape performance a nghawng dan a sawifiah a ni.
Glass Transition Temperature (Tg) hi eng nge ni a, engvangin nge a pawimawh?
Glass transition temperature (Tg) hi polymer pakhat chu a nem, rubbery state atanga hard, brittle glassy state a inthlakna hmun a ni . Tg aia temperature a tlak chuan polymer molecular chain te chu a freeze a, fluidity leh adhesive ability a hloh thin.
Pressure-sensitive adhesives te tan chuan:
Tg chunglam: Chain te chu zalen takin an kal → adhesive chu a nem a, a sticky a, a chunglam a hnim thei bawk
Tg hnuaiah: Chain te chu a vawt → adhesive chu a khauh a, tack a hloh a, a brittle bawk
Silicone PSA hi a bik chhan: A Tg -120°C hi acrylic adhesives (Tg around -20°C to -30°C) nena khaikhin chuan a hniam hle. Hei hian silicone chu temperature range zau zawk – -70°C atanga 260°C thlengin elastic leh sticky takin a awm reng tihna a ni.
Tg leh adhesive performance inzawmna hi on/off switch awlsam tak a ni lo. Tg aia sang 30°C-ah pawh molecular mobility a la tlem hle a; adhesive chu fully rubbery aiin ‘leathery’ a ni thei. -50°C hnuai lama PTFE tape hmanna atan chuan adhesive hian ‘rubbery plateau’ modulus 104 leh 106 Pa inkar a vawng reng tur a ni a, Silicone PSA hian a flexible siloxane backbone (–Si–O–Si–) avang hian -80°C vel thlengin a ti thei a ni. Acrylic adhesives, carbon-carbon backbones khauh zawk nei te hian -30°C hnuaiah tack an hloh tlangpui. Hei hian freezer-a hman tur (-30°C atanga 0°C) emaw cryogenic environment-a hman tur silicone-based PTFE tape chauh hman a tha tih a sawifiah a ni.
PTFE Tape-a Tg-in Microscopic Influence Mechanism a neih dan
-a low-temperature performance pum pui chu PTFE high-temperature tape pahnih hian an inzawm khawm a ni adhesive layer leh PTFE substrate . PTFE ngei pawh hian Tg -120°C vel a nei bawk – mak tak maiin silicone PSA nen a inang hle.
Temperature Range a ni
Adhesive State a ni
PTFE Substrate State a ni
Tape Thiltih dan tlangpui
Tg aia sang (>-120°C, entirnan, -70°C) a ni.
Rubbery, a hring hring
Fan thei
Adhesion tha tak, cracking awm lovin a bend thei
Tg bulah (-120°C vel) .
Transition zone a ni
Transition zone a ni
A tlahniam a, mahse a la thawk thei tho
Tg hnuai lam (<-120°C, entirnan, -180°C)
Glassy, a hring hring
Phiarfat
Adhesion chu a bul berah chuan a hloh a; tape chu a brittle ta a ni
Key insight: Service temperature chu a awm chhung chuan Tg aia sang zawka (eg, -70°C, chu chu -120°C aia sang 50°C a ni), adhesive leh substrate pahnih hi elastic state-ah an awm vek a, hei hian low-temperature flexibility tha tak leh stable adhesion a tichiang a ni.
Aokai PTFE’s thermal analysis lab chuan silicone PSA hian a room-temperature peel strength -70°C-ah 80% aia tam a vawng reng tih a nemnghet a, acrylic PSA erawh chuan -30°C hnuaiah 90% aia tam a hloh thung. He data hi Tg danglamna nen a inmil a ni.
Cryogenic hman tak takah (eg, low-temperature plasma spraying emaw liquid nitrogen dewars-a temporary fixation atana mask tape) hmangtute chuan PTFE film chu a crack avangin an puh sual fo thin a, a tisualtu tak chu adhesive a nih laiin. Adhesive chu a Tg hnuaiah a freeze chuan compliance a hloh a, bending stress a absorb thei lo. Chumi hnuah chuan strain chu PTFE substrate-ah a transfer a, chu chu a la flexible thei a, mahse adhesive-a stiff layer chuan stress concentrator angin hna a thawk a, adhesive-substrate interface-ah crack a siam a ni. Solution chu PTFE film thick zawk hman ni lovin, adhesive chu a Tg aia sang a awm reng theih nan a ni. -150°C hnuai lama extreme cryogenic condition tan chuan silicone PSA pawh hi marginal a ni. Chutiang hunah chuan mechanical fastening (clamps, screws) emaw adhesive-free PTFE tape emaw hman a tha a, -180°C hnuaiah hian PSA engmah a thawk thei lo.
Low-Temperature Adhesion leh Flexibility-a nghawng a neih dan
1. Temperature hrang hranga adhesion
Temperature Range a ni
Adhesion Level a ni
Hrilhfiahna
-70°C atanga 0°C thleng a ni
A tha lutuk
Tg aia sang → molecular chains active, wetting tha leh energy dissipation tha
-100°C atanga -180°C thleng a ni
A tlahniam
Molecular motion khap a ni a, mahse silicone hian acrylic a la phak lo hle
-180°C hnuai lam a ni
A bul berah chuan zero a ni
Chain te chu a vawt vek tawh mai; PSA nungchang a bo ta
2. Temperature hniam lama inthlak danglam theihna
Ultra-low Tg (-120°C) hian adhesive hian -70°C-ah pawh elasticity leh softness a vawng reng thei a, brittle cracking a veng tha hle. Tape hi brittle fracture awm lovin zalen takin a ben thei a, a khuh thei a, a hliam thei bawk – adhesive tape pangngai, khaw lum hmuna a chhe thei ang lo takin.
Thupui tawi & Dilna atana kaihhruaina
Silicone PSA glass transition temperature hniam tak hian PTFE high-temperature tape hian temperature hniam takah pawh stable viscosity leh flexibility a vawng reng thei a ni.
Temperature range hrang hranga thlan dan tur kaihhruaina:
Service Temperature a ni
Product siam tura rawtna siam
Notes te chu
≥ -70°C a ni
Standard PTFE tape leh silicone PSA hmanga siam a ni
Cold application tam zawk (freezer, cold climate) atan a tha tawk vek
-70°C atanga -180°C thleng a ni
A bik taka siam danglam ultra-low temperature resistant PTFE tape
Custom formulation a ngai mai thei
≤ -180°C a ni
Adhesive tel lo PTFE film thianghlim + mechanical fixation hmanga siam a ni
Temperature hniam taka hman tur (eg, hmun lum takah tape hman tur) atan chuan tape leh bonding surface pahnih chu a tir lama adhesion tihchangtlun nan preheat la
Tape 0°C hnuai lama warm lovin hnawih loh tur – silicone PSA pawh hian wetting dik tak neih theih nan Tg aia sang initial contact a mamawh a ni
In summary , silicone pressure-sensitive adhesive-a ultra-low glass transition temperature (-120°C) hian PTFE high-temperature tape chu khaw lum leh cryogenic environment atan a danglam bikna a siam a ni. Acrylic tape te hi -30°C hnuaiah an fail laiin, silicone-based PTFE tape erawh chu -70°C thlengin a flexible leh sticky reng a ni – adhesion tihhniam chuan temperature hniam zawkah pawh a dam khawchhuak thei bawk.
Industrial cold application tam zawk (freezer, cold chain equipment, thlasik laiin pawn lama installation) tan chuan silicone PSA nei standard PTFE tape hian rintlak takin hna a thawk a ni. Deep cryogenic hna thawk tur chuan specialist rawn la – -150°C hnuai lama mechanical fixation ngaihtuah bawk ang che.
Temperature hniam taka hman tur PTFE tape i mamawh em? Aokai PTFE hian khaw lum hmun hrang hrangah standard leh modified grade a pe a. I temperature range leh duty cycle te chu kan technical team te hnenah zawhfiah theih a ni.
Jiangsu Aokai New Materials Technology Co., Ltd. atanga tihchhuah a ni.
Parameters chipchiar tak, application scenario, leh full-series products customized solutions te zingah PTFE high temperature fabric, PTFE high temperature tape, PTFE mesh belt, seamless fusing belt, single-sided PTFE puan, high temperature resistant conveyor belt leh fiberglass fabric te pawh a tel a , min rawn biak theih reng e:
