PTFE tape adhesion principle chu eng nge ni?

PTFE tape siamtu professional Jiangsu Aokai New Materials siam PTFE tape hian silicone pressure-sensitive adhesive (silicone PSA) a hmang a ni . Silicone PSA adhesion hian PSA universal step pathum: wetting – adsorption – cohesion , a zawm a, mahse a mechanism chu a danglam bik a ni:

1. Wetting leh taksa lama adsorption

PTFE tape-a silicone PSA hi hengte hi a inzawm khawm a ni:

·  Silicone rubber  (a flexibility leh softness a pe) .

·  MQ silicone resin  (rigidity leh tack a pe)

Light pressure hnuaiah chuan flexible silicone rubber chain te chu rang takin an luang a, substrate micro rough surface chu a hnim a ni. Physical adsorption hi van der Waals force  leh partial hydrogen bonds hmanga thleng a ni.

2. 'Sea island' structure: adhesion leh cohesion inthenna

Hei hi PTFE tape-a silicone PSA hman dan danglam ber a ni:

·  MQ resin (the 'islands') : rigid three dimensional cage ang chi structures adhesive layer chhunga theh darh. an pe a Adhesion  – MQ resin-a silanol group (Si–OH) te hian glass, metal, leh silicone rubber ang chi surface te nen inzawmna nghet tak an siam a.

·  Silicone rubber (the 'sea') : polymer phase kal zel a ni a, chu chuan cohesive strength a pe a ni a chhunga a chhunga chhiatna do thei turin peeling.MQ resin leh silicone rubber ratio siamrem hian tack  leh peel chakna chu  chiang takin a inthlau thei.

3. Crosslinked network hian inpumkhatna a tipung

Curing emaw siam chhuah emaw lai hian silicone rubber chain te chu hmangin crosslink tawk tawkin peroxide  emaw platinum catalyst  three dimensional network an siam thin. Hei hian adhesive layer chu stress hnuaia interfacial peeling thianghlim a tawk zawk tih a tichiang a ni. aiin cohesive failure  (adhesive chhunga a chhe)

Khaihtawi

PTFE tape adhesion hian hetiang hian hna a thawk a:

·  Silicone rubber hian a chunglam a hnim a, van der Waals force hmangin physical adsorption a pe bawk.

·  MQ resin ('islands') hian adhesion a pe a; silicone rubber ('tuipui') hian inzawmna a pe a ni.

·  Crosslinking tlemte hian cohesion a tichak a, internal adhesive failure a veng bawk.

A chunga kan tarlan te hi Jiangsu Aokai New Material Technology Co., Ltd.

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