Why Polymers Are Difficult to Bond

Many polymers, especially low surface energy materials, are inherently difficult to bond, coat, or print. Surface chemistry, contamination, and poor wettability often prevent adhesives, inks, and coatings from performing reliably.

Common Challenges

• Low surface energy on materials such as polyethylene, polypropylene, and PTFE
• Poor wettability and adhesive spread
• Surface contamination from oils, dust, or release agents
• Inconsistent bonding and coating performance

Traditional surface treatment methods such as corona discharge, flame treatment, or chemical primers can produce inconsistent or short-lived results, especially on demanding materials and complex geometries.

How Atmospheric Plasma Treatment Works on Polymers

Atmospheric plasma is a partially ionized gas that interacts with the surface of a material at the molecular level. It modifies only the outermost surface layer, helping improve adhesion and cleanliness while preserving the bulk properties of the polymer.

Key Effects of Plasma Treatment

• Surface Activation: Introduces polar functional groups that increase surface energy
• Precision Cleaning: Removes organic contaminants and residues
• Surface Functionalization: Enhances chemical bonding capability
• No Bulk Material Damage: Only the outermost nanolayers are modified

Unlike vacuum plasma systems, atmospheric plasma can be integrated inline, making it well suited for manufacturing and production environments.

Polymers Commonly Treated with Plasma

Intrface plasma systems are effective across a wide range of polymer materials used in industrial, medical, and advanced manufacturing applications.

Low Surface Energy Plastics

• Polyethylene (PE)
• Polypropylene (PP)
• Polytetrafluoroethylene (PTFE)

Engineering Polymers

• PEEK
• Polycarbonate (PC)
• Nylon (PA)

Other Materials

• PET
• PVC
• ABS

If you are working with a specific substrate, contact us for application testing.

Plasma Treatment vs Traditional Surface Treatment Methods

Atmospheric plasma offers significant advantages over conventional surface preparation techniques, particularly when consistency, material compatibility, and process control are critical.

Plasma vs Corona Treatment

• More uniform treatment across complex geometries
• Greater control over surface chemistry
• Improved consistency and repeatability

Learn more about Plasma vs Corona Treatment

Plasma vs Flame Treatment

• Lower thermal impact on sensitive materials
• No combustion byproducts
• Safer and more controlled process

Plasma vs Chemical Primers

• Eliminates need for hazardous chemicals
• Reduces process steps
• Improves environmental and safety profile

Applications of Plasma Treatment for Polymers

Atmospheric plasma is widely used to improve surface performance across industries where adhesion, cleanliness, and reliability are essential.

Medical Devices

• Catheter bonding
• Microplate surface preparation
• Coating adhesion for implants and components

Electronics and Semiconductor

• Surface cleaning before assembly
• Improved adhesion for coatings and encapsulation

Composites and Aerospace

• Surface preparation for bonding and painting
• Enhanced coating durability

Printing and Packaging

• Improved ink adhesion
• Uniform coating application

Typical Results from Plasma Treatment

Results vary by material and process conditions, but common outcomes include:

• Increased surface energy
• Improved wettability and adhesive spread
• Stronger and more durable bonds
• Reduced process variability

Request testing to evaluate results on your materials.

Intrface Plasma Systems for Polymer Treatment

Intrface Technologies develops atmospheric plasma systems optimized for polymer surface modification in both research and production environments.

Key Capabilities

• Atmospheric operation with no vacuum required
• Treatment of complex 2D and 3D geometries
• Scalable from R&D to full production lines
• Efficient gas usage and process control

Application-Driven Approach

We work directly with customers to evaluate materials, optimize plasma parameters, and validate performance through real-world testing.

Explore our plasma systems