One glue line. One clear job.
That is how we think about our psa hot melt adhesive. It puts a single line of glue along the middle of the pad core. That line acts like a locking pin. It locks the absorbent core, the top nonwoven, and the back PE film together. We use the word "lock" a lot in our factory. Because that is what this glue does. It stops the core from breaking. It stops it from separating. It stops wrinkling and sideways shifting. These are big problems when the pad gets wet. A lot of customers come to us with this issue. "My cores keep breaking after use." Our answer is always this glue.
Finding the balance was hard.
Strong fixing versus soft feel. You cannot have one without the other. We use a high-inner-strength SIS/SBS mix. That gives the glue good resistance to pulling. Our team adjusted the resin and plasticizer types. The glue works at 140-160°C. That temperature is safe for delicate materials. At 150°C, the melt viscosity is 3000-5000 mPa·s. That is a bit thicker than normal. It needs to be. Because it must penetrate porous materials like fluff pulp and SAP wrap. But it also needs to be precise for slot or dot coating. The final glue line is clean and even. It acts like a firm backbone.
Wet strength is the main benefit.
Normal glues lose their bond fast when wet. Our psa hot melt adhesive keeps over 70% of its strength. That stops clumping and breaking.
|
Parameter |
Value |
|
Softening Point |
85 - 95°C |
|
Wet Strength Retention |
> 70% |
|
Viscosity (150°C) |
3000 - 5000 mPa·s |
|
Inner Cohesion |
Very High |
|
Safety |
REACH, HG/T 3948 |
No stringing during cutting. No residue on the top layer. The surface stays dry. That is what we deliver.
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