Surface protective film
The urethane adhesive film with catalysts ensures smooth wetting and spreading, addressing the uneven adhesion issue of conventional films by enhancing adhesion properties and maintaining film transparency and peelability.
JP7868268B2Active Publication Date: 2026-06-01NITTO DENKO CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- NITTO DENKO CORP
- Filing Date
- 2024-08-05
- Publication Date
- 2026-06-01
Smart Images
Figure 0007868268000003 
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Figure 0007868268000002
Abstract
Provided is a surface protective film that is capable of exhibiting highly exceptional wettability and spreads smoothly to edges from the start to the finish of affixing to an adherend. A surface protective film according to an embodiment of the present invention includes an adhesive layer configured from a urethane-based adhesive, wherein the urethane-based adhesive includes a urethane polymer, the urethane-based adhesive is formed from a urethane-based adhesive composition, the urethane-based adhesive composition includes a base polymer (A) and a catalyst (B), the base polymer (A) is a urethane prepolymer obtained by reacting a polyol and a polyfunctional isocyanate compound, and the catalyst (B) includes at least one selected from the group consisting of zinc-based catalysts and titanium-based catalysts.
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