What Is Leaching?

Leaching occurs when adhesive materials or residues from tapes, liners, or surface-protection films migrate onto your product. In industries such as display and electronics manufacturing, even microscopic traces of contamination can lead to visible defects, adhesion problems, or poor optical quality. For example, when applying phone screen protectors or optical films, leaching can cause haze, bubbling, or weak adhesion — little problems that quickly turn into major yield losses.

Why Leaching Happens

 Leaching typically results from:

•  Pressure-sensitive adhesives (PSAs) breaking down over time or under heat/humidity.

•  Chemical migration from protective films or liners.

•  Static attraction, which draws microscopic particles and adhesive residues to charged surfaces.

These issues are common in environments where materials come into contact repeatedly — such as laminating, coating, or applying optical films.

How Leaching Impacts Product Quality

Leaching leads to:

• Visible surface defects on screens, glass, or plastic.

• Reduced adhesion strength or inconsistent bonding.

• Rework and scrap, driving up production costs.

• Quality control failures for high-spec components like phone screens, camera modules, and automotive displays.

How Teknek Tackles Leaching

Teknek’s contact-cleaning systems are engineered to remove microscopic contamination before leaching-related defects occur.

Here are some of the key products and how they help:

1.  Cleaning Rollers such as the “Nanocleen” and “NTcleen” series — These elastomer rollers are designed to safely remove dry, unattached particles down to nanometre scales (e.g., <20 nm) without damaging delicate surfaces.

2.  Adhesive Rolls like the “GAR” roll — Teknek pairs their cleaning rollers with specially formulated adhesive rolls (e.g., GAR) to capture debris from the elastomer roller and prevent residue transfer back to the product. 

3. Contact Sheet Cleaners such as the “CM81” — For sheet or board processes (which may include substrates for phone screens and optical films), the CM81 sheet cleaner ensures substantial contamination removal before downstream operations. 

4. Roller Maintenance Tools like “Tekwipes” and “Roller Doctor” — Using Tekwipes (lint-free wipes) and the Roller Doctor cleaning pads ensures that your cleaning rollers maintain peak performance. Clean rollers help prevent residue buildup which itself can contribute to leeching. 

Phone Screen Protection Film Application

In display production lines where screen protectors are laminated onto phone glass, even tiny adhesive residues or particles can cause bubbles or haze. By integrating a Teknek cleaning system just before lamination, manufacturers can ensure:

• Flawless optical clarity

• Consistent adhesion

• Longer die/mold/panel life

• Less rework and fewer rejects

This cleaning step removes both visible and sub-visible contamination that leads to leaching defects.

Conclusion

Leaching might be invisible at first, but its impact on yield and appearance is hard to ignore. Teknek’s particulate removal technology and maintenance tools provide a proven barrier against adhesive and particulate contamination — protecting the performance and appearance of your most critical surfaces.

Click here to contact your local static specialist to find the perfect Teknek cleaning solutions today!