Pressure Sensitive Adhesive (PSA) Industry

Pressure Sensitive Adhesive (PSA) Industry

 

Release films serve as essential components in PSA tape and label production, protecting adhesive layers until application while enabling efficient converting processes. The PSA industry consumes millions of square meters of release liners annually.

Label stock construction typically uses:

 

Glassine papers: Economical option for general purposes

 

Clay-coated kraft papers: For higher rigidity needs

 

Film liners: Superior dimensional stability

 

Film liner advantages:

 

Moisture resistance (0% dimensional change at 90% RH)

 

Temperature stability (-40°C to 150°C)

 

Superior convertibility (die-cutting, printing)

 

Specialized PSA applications:

 

High-tack adhesives: Requiring heavy release coatings (200-500g/inch)

 

Medical PSAs: Needing clean release with no residue

 

Repositionable adhesives: Benefiting from medium release (50-100g/inch)

 

Converting considerations:

 

Coefficient of friction (COF) control: 0.2-0.5 for smooth machine running

 

Anti-static properties: <10¹¹ ohms/square

 

Printability: Accepting flexo, gravure, or digital printing

 

Emerging trends:

 

Digital printing compatibility: Coatings that accept UV/water-based inks

 

Sustainable liners: PCR-content or compostable films

 

Multi-layer liners: Combining different release forces

 

Performance testing includes:

 

Peel adhesion (PSTC-101, FINAT FTM 1)

 

Aging studies (70°C/50% RH for 28 days)

 

Conversion testing (500+ meter rolls at 300 m/min)