A. Liquid Materials

Membrane Adhesive

STM-101 Keyboard Waterproof Adhesive is an acrylic-based polymer adhesive designed for high-speed screen printing and thermal drying in membrane-keyboard manufacturing. It forms an adhesive pattern aligned with the circuit layout on polyester (PET) film. After drying, the adhesive layer provides water-barrier properties that help improve the water resistance of membrane-keyboard assemblies.

Key Technical Features

01　High Solids & Cleanliness

A high-solids formulation with a translucent appearance, suitable for precision membrane-circuit assembly.

02　Screen-Printing Compatibility

Designed for high-speed screen printing and subsequent oven drying, with stable viscosity and practical handling characteristics.

03　Water-Barrier Design

The dried adhesive layer exhibits a high water contact angle, helping limit moisture ingress at the bonding interface.

Applications: membrane-keyboard lamination, PET circuit-film assembly, and water-resistant adhesive patterns.

Application & Process

Illustration of membrane-keyboard lamination and water-barrier construction.

Keyboard waterproof adhesive application diagram

Keyboard waterproof adhesive process / application

Typical Application

Membrane Keyboard Assembly & Water Resistance

A printed adhesive pattern is formed by screen printing and drying to match the film stack and circuit layout.

Membrane-keyboard application (1)

Waterproof membrane-keyboard structure diagram

Membrane-keyboard application (2)

Technical Specifications

Representative properties of STM-101 for process assessment and material selection.

Property	Unit	STM-101
Appearance	—	Translucent
Viscosity	cP	8,500
Active content	%	48
Peel strength	gf/inch	1,500
Water contact angle	°	113

Packaging3 kg

Note: The above values are for reference only and are not guaranteed shipment specifications. Refer to the latest product Technical Data Sheet (TDS) for official specifications.