Electronics ProductsThermo-setting Electrical Isolation Film

"SJ41" is an thermo-setting electrical isolation adhesive film and also has suitable adhesion for various materials such as metals and resins, etc...

The conventional liquid type adhesive material has high adhesion strength and high heat resistance. However, its workability is an issue in comparison with adhesive tape.
TOMOEGAWA's adhesive film is molded to sheet form with thermo-setting liquid glue by our proprietary developed process. This unique adhesive film maintains high adhesive strength and high heat resistance with improved workability.
The application of adhesion to small parts and any fragile parts has increased with the continuing trend of down-sizing and weight-saving for industrial products. Since our adhesive film can fully cover all necessary surrounding area , it strongly adheres even with small or low strength parts.

An example of customer's inquiry.

We would like to process the film without variation even by less experienced worker.

Even if experienced worker process liquid type adhesive material, it would be possible to encounter extrusion issue or dripping issue. However, TOMOEGAWA's adhesive film is easily handled since it is molded on sheet form.

Since our refrigerated warehouse is almost full, we need out sourcing company to keep adhesive material refrigerated.

TOMOEGAWA's adhesive film is NOT required to keep it refrigerated.

Feature 1The adhesive film achieves a merit of liquid type adhesive and adhesive tape.

The conventional liquid type adhesive material has high adhesive strength and high heat resistance. However, its workability is an issue in comparison with adhesive tape.
TOMOEGAWA's adhesive film is molded to sheet form with thermo-setting liquid glue by our proprietary developed process. This unique adhesive film maintains high adhesive strength and high heat resistance with improved workability. TOMOEGAWA's adhesive film DOES NOT require refrigeration.

	Merit	Demerit
Thermo-setting adhesive film SJ41	High adhesion strength and high heat resistant. High workability in comparison with liquid type adhesive material. No need to pot life management, masking or management of liquid amount. Easy process/cut to any shapes.	Need to thermo curing the adhesive film to make the film to adhered.
Liquid type adhesive material	High adhesion strength and high heat resistance.	Low workability. Odor generation.
Pressure sensitive adhesive tape	Easy to adhere with pressurization. High workability. Easy to process/cut to any shapes.	Adhesion strength and heat resistance are less than liquid type adhesive material.

Feature 2It is possible to adhere to metals and resins, etc.

It is possible to adhere to the following materials.

Metals: SUS, Copper, Aluminum, Nickel, etc.
Resins: Polyimide, Glass epoxy, FRP, etc.
Others: Ceramic such as Alumina, Glass, etc.

The film strongly adheres to various materials like the below.

Technical data

Characteristic item	Specification	Remarks
Thickness (μm)	20
Adhesion strength (N/cm)	17	Adherend: SUS304
Breakdown voltage (KV/mm)	230
Tackiness under room temp.	No
Curing condition	150℃～200℃ 0.5～1hr or longer
Application temp	100～120℃
Storage	Room temperature

Application

Electronic materials
The film has good result for years because of its high reliability.
Automotive parts
To keep high adhesion strength and contribute to weight-saving.

Layer Structure

Layer composition without JS41 base material

※Thickness of adhesive layer and cover film is adjustable.