Psas on Film Liners cafa convention

PSAs on Film Liners

• CAFA Convention

• Marriott Hotel & Golf Resort

• Saturday, February 11, 2007

Types of Film Liners

• PET (Polyester)

• Highest temperature resistance

• Strong, stretch resistant

• Kiss & die cut-able

• PE (Polyethylene)

• Lower heat resistance

• Softer & “hand” stretchable

• Low & high density available

• PP (Polypropylene)

• Higher temperature resistance than PE

• Soft - hand stretchable

• Die cuttable

Paper Liners vs. Film Liners

• Paper Liners

• Described by basis weight

• Adequate caliper control

• Adequate cross web profile

• Moisture sensitive

• Tears easily

• Opaque

• Generally lower cost

Typical Silicone-Coated Release Liners

• 55 lb. Densified Kraft (SCK)

• 60 lb. Poly-coated

• 74 lb. Poly-coated

• 80 lb. Densified Kraft (SCK)

• 12 pt. Board (poly-coated)

• 1.5-mil Polyester Film

• 2.0-mil Polyester Film

• 4.0-mil Polyester Film

• 5.0-mil Polyethylene & Polypropylene Film

So…What’s a “Lb.”?

• Lb. refers to the basis weight of the paper expressed per ream where….

• 1 ream of paper = 333.3 Square Yards

• 333.3 SY of a 55 lb. liner will weigh 55 lbs.

• 12 pt. Board refers neither to basis weight nor to caliper. It’s a different measure.

• 12 pt. Board in basis weight = 140 lb.

What about Poly-coated?

• The paper & the polyethylene coating are added together to get the total basis weight.

• Example: A 74 lb. poly-coated liner could consist of a 50 lb. paper coated with 12 lbs. of polyethylene on each side.

Advantages of Film Liners

• Strength to reduce tear during removal

• Dust free for clean room operations

• High speed rotary die cutting

• Reduced wear on rotary dies

• Ease of automation (robotic assembly)

• Moisture resistant

• Clear visibility for substrate marking

Industries Using Film Liners

• In addition to the abrasives industry, film liners can be found typically in the following:

• Electronics

• Automotive

• Medical

• Fenestration or Window Manufacturers

Summary

???Questions???