Good glue makes good tape! One article to unlock UV curing hot melt pressure-sensitive adhesive

Good glue makes good tape! One article to unlock UV curing hot melt pressure-sensitive adhesive (From ADHESIVE INFO)

Compared with traditional hot-melt pressure-sensitive adhesive, UV curable hot-melt pressure-sensitive adhesive has better performance and environmental protection.

Introduction of traditional hot melt pressure-sensitive adhesive

The traditional hot melt pressure-sensitive adhesive is a kind of thermoplastic polymer, which is used in the heating and melting state, and produces adhesion and sealing properties when cooling.      

Its characteristics are: no solvent is used, the solid content is 100%, it is solid and sticky in the cooling state, and it is liquid and can be coated after being heated to a certain temperature.  

Its main components are as follows:

1. Thermoplastic polymers: styrene butadiene ternary block copolymer (SBS) and styrene isoprene

2. Diene styrene ternary block copolymer (SIS)

3. Tackifying resin (solid or liquid) rosin, rosin resin and terpene resin

4. Plasticizer: oil or liquid resin

5. Stabilizer/antioxidant

6. Other additives: fillers, pigments, waxes, etc

The traditional hot melt pressure sensitive adhesive has the following disadvantages due to its resin structure and formula:

1. Poor high temperature resistance

2. Poor solvent resistance

3. Poor weather resistance

4. Poor stability

UV curable hot melt pressure-sensitive adhesive

UV curable hot melt pressure-sensitive adhesive is also used in the heating and melting state. After UV irradiation, the photoinitiator groups are connected to the main chain of the pressure-sensitive adhesive through chemical bonds, thus forming an irreversible chemical crosslinking structure.      

Features of UV curing hot melt pressure-sensitive:

1. Polymers containing 100% UV curable functional groups

2. UV curing energy adjusts adhesion and retention

3. Operating temperature 120-140 ℃

4. Non volatile VOCs

5. No need for long oven drying and curing production line

The components of UV hot melt acrylic pressure sensitive adhesive are as follows:

1. Acrylate polymer

2. Plasticizer: solid resin

3. Photoinitiator

At the same time, the hot melt pressure-sensitive adhesive after UV curing and crosslinking will have the following advantages:

1. High temperature resistance

2. Good solvent resistance

3. Good weather resistance

4. Good stability

UV hot melt pressure-sensitive adhesive has advantages in various properties, environmental protection and construction operation.