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PP (polypropylene) plastic has extremely low surface energy and is difficult to wet. Ordinary EVA hot melt adhesive particles stick directly, which is basically a “false adhesion” and can be easily peeled off. This is the most common pitfall: thinking that hot melt adhesive is omnipotent, but the PP adhesive falls off completely.
| Scene | method |
|---|---|
| PP packaging adhesive | Select PO type/modified special particles+surface treatment |
| PP and paper composite | Specialized formula for soaking paper while grabbing PP |
| Small fixed area | Apply adhesive after primer for greater stability |
Q: Does Sunlife have particles that can stick to PP?
Answer: Yes, Guangzhou Sunlife Trading recommends specialized models based on PP type and sends samples.
Q: Can the surface stick without treatment?
Answer: Difficult, it is recommended to at least do corona discharge, which has low cost and good effect.
Q: Is PE as difficult to stick as PP?
Answer: Similar, both belong to polyolefins and require specialized formulas.
PP adhesive overturned, sent the material sample to Guangzhou Sunlife Trading, and Sunlife hot melt adhesive provided the formula+process combination.
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