What glue is the strongest for bonding PP plastic?

Kanglibang CL-26A/B-1 silicone-to-PP adhesive is primarily used for heat-curing adhesives on rigid substrates such as addition-type and peroxide-type silicone rubbers, molding silicone rubbers, PP (corona-treated), TPU, and PA.

With proper use of surface treatment agents or formulation optimization for PP, strong adhesion can be achieved. Specific selection requires comprehensive judgment based on the application scenario, bonding area, and operating conditions.

PP plastic (polypropylene) exhibits poor adhesion to most adhesives due to its non-polar and low surface energy characteristics, requiring the selection of highly targeted products or the use of surface treatment agents.

The following products can be considered:

1. Polyurethane Adhesive (PU Adhesive)
Polyurethane adhesive is a strong adhesive with good water and weather resistance, maintaining adhesion in various environments. It is suitable for surface bonding of PP materials and possesses excellent toughness, effectively resisting vibration and impact.

2. Epoxy Resin Adhesive

Epoxy resin adhesive has strong adhesion, particularly excelling in applications between metals and plastics. For PP materials, epoxy adhesives provide a strong bond, suitable for applications requiring high pressure resistance.

Choosing the right adhesive is crucial for bonding PP materials. In practice, it is recommended to clean the PP surface first, removing oil and dust to ensure optimal adhesive performance.

Selecting the appropriate type of adhesive for different needs will effectively improve the durability and strength of the bond.

3. Hot Melt Adhesive

Hot melt adhesives are highly suitable for PP materials, especially for applications requiring rapid bonding. They are liquid when heated and solidify quickly upon cooling, forming a strong bond. Hot melt adhesives have a wide range of applications, suitable for most bonding needs in everyday items and light industry.

4. Conliban Special Adhesive

These typically contain strong surfactants, enabling better adhesion on PP surfaces. For applications requiring durable and high-strength bonding, this type of specialized adhesive is highly suitable.