Hardener 348 for screen frame adhesive bond strength

Hardener 348 is added to an adhesive at the appropriate ratio to enhance the cured adhesive’s properties. It must be used with a compatible base adhesive and is not a standalone adhesive.

In screen printing, it can be used for bonding mesh to frames when the adhesive system is specifically approved by the supplier for use with Hardener 348. Selecting the correct adhesive and hardener combination is essential to achieving the required bond quality.

Key Features

1. Improved Adhesion

According to the supplied product information, Hardener 348 improves initial adhesion and helps form a stable bond when mixed with a suitable adhesive.

2. Enhanced Bond Stability

Helps improve shape retention and dimensional stability in the bonded area after the adhesive has cured.

3. Improved Heat and Moisture Resistance

Helps improve the heat resistance, moisture resistance, and water resistance of compatible adhesive systems. The degree of improvement depends on the base adhesive, mixing ratio, and processing conditions.

4. Convenient Mixing

Add to the adhesive and mix thoroughly before use. Prepare only the quantity needed for each work session to minimize waste caused by leftover adhesive curing.

Product Information

Screen Printing Applications

For mixing with mesh-to-frame adhesives confirmed to be compatible with Hardener 348.

Do not assume compatibility with all frame adhesives, pallet adhesives, or photosensitive emulsions. Each system has specific requirements for the hardener and mixing ratio.

Directions for Use

▫ Check compatibility: Confirm the base adhesive product code, mixing ratio, and measuring method according to the supplier’s instructions.

▫ Prepare only the required quantity: Add Hardener 348 at 3–5% relative to the adhesive quantity.

▫ Mix thoroughly: Stir well to distribute the hardener uniformly throughout the adhesive before application.

▫ Use within the specified pot life: Use the mixture within 1.5–2 hours after mixing.

Precautions

▫ Do not premix large quantities. Prepare only the amount required.

▫ After 1.5–2 hours, the mixture cures and cannot be reused. Do not add solvent to restore usability.

Storage and Pre-Production Testing

Reseal the container tightly after dispensing. Do not return mixed adhesive to the hardener bottle or can.

Follow the storage conditions and safety requirements stated on the actual product label and safety data sheet.

Test with a small quantity of adhesive and the intended materials before bulk production. For frame bonding, check bond strength and stability before releasing the mesh tension from the stretching equipment.