Psas on Film Liners cafa convention
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20.05.2018
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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???
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