UV curable Adhesive

3320-4T is one-part LED UV curable acrylate adhesive, thixotropic paste with non-sagging performance. It delivers tack-free dry surface after curing, excellent flexibility and bending resistance, good thermal-shock performance. Great adhesion to PVC, PMMA, PC, ABS, PI, PS, TPU, metal and glass. Widely used for plastic dissimilar-material bonding and PCBA special component encapsulation reinforcement. Support heating dispensing for high-speed production line. Sample available.

3320-4T is a one-component LED UV-curable acrylate adhesive, formulated as tack-free flexible bonding & reinforcing UV paste. It features fast curing speed, outstanding flexibility and bending-resistant property. It provides reliable adhesion on multiple substrates including various engineering plastics, PI film, metal and glass. This adhesive is also suitable for encapsulation process of special components on PCBA boards. It is widely adopted for elastic-required plastic bonding, plastic-to-metal / plastic-to-glass dissimilar-material joining and electronic component encapsulation & reinforcement.

Typical Applications
Plastic Material Bonding:
Bonding for PVC, PMMA, PC, ABS, PS, TPU and other engineering plastic parts that require elastic flexible joint
Dissimilar-material bonding: plastic-to-metal, plastic-to-glass assembly
Electronics PCBA Manufacturing:
Encapsulation and reinforcement for special components on PCBA circuit board
Component protection, stress relief for electronic assemblies
Other Industries:
Plastic crafts, consumer-goods assembly and other scenarios requiring flexible bonding and reinforcement.

Key Features & Advantages

1.High thixotropic paste, non-sagging after dispensing Paste-like consistency, no dripping or flowing after dispensing, perfect for vertical and side-wall dispensing work. Support heating-assisted dispensing process at 50-60℃ to meet high-speed automated production requirements.

2.Excellent multi-substrate compatibility Strong adhesion performance for PVC, PMMA, PC, ABS, PI, PS, TPU, metal and glass, solves bonding challenges for dissimilar-material assembly.

3.Tack-free dry surface after UV curing No sticky residual surface upon full UV exposure. No extra wiping or post-treatment required, keep assembly surface clean for downstream procedures.

4.Superior flexibility and bending resistance Cured adhesive layer keeps good elasticity. Resists repeated bending without crack or delamination, ideal for dynamically stressed parts.
5.Good high-low temperature shock resistance Stable bonding performance under cyclic thermal shock conditions, improves long-term reliability for finished products.

6.LED UV curable, high production efficiency Compatible with mainstream LED 365nm & LED 395nm UV light sources. Fast curing supports high-volume mass production lines.

7.100% solid-content, solvent-free formula Zero solvent release, low VOC, eco-friendly for electronic manufacturing.

Compatible UV Wavelength: LED 365nm, LED 395nm
UV Intensity: 120mW/cm2
Cure Time (1mm thickness): 15seconds
Total curing energy for full cure: 1800mJ/cm2
Test energy for final physical-property measurement: 2500mJ/cm2
Note: Actual curing result depends on UV intensity, exposure distance, glue thickness and light transmittance of substrates.
Remark: Shear strength varies with different substrates. Above values are typical lab test data for reference only.

Storage Condition: Store in cool and dark environment. Optimal storage temperature: 8-28℃. Keep away from direct light and heat sources.
Shelf-Life: 6 months under recommended storage condition.
High or low storage temperature will affect dispensing performance and final adhesive properties.

Make sure bonding surfaces are thoroughly cleaned without grease and dust. Apply adhesive by manual dispensing gun or automatic dispensing equipment, control target glue-layer thickness.
For high-speed production: heat dispensing valve to 50-60℃ to reduce working viscosity for fast jet-dispensing.
Tightly close cap after usage. Do not pour extruded leftover glue back into original container to avoid cross-contamination.