lamination presentation
TRANSCRIPT
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Lamination• Bhupendra Singh
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Lamination
• Two or more films laminated to combine their characteristics
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Lamination Advantages• Good heat Sealing
properties can be achieved
• Good Barrier Property• Better Printing • Better Strength• Flavor Retention• Improved Puncture
Strength
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Lamination Process
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Lamination Process • Heat
Lamination
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Lamination Process • Wet
Lamination
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Lamination Process • Dry
Lamination
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Lamination Process • Pressure• Lamination
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Variable Parameter• Material Properties
– Chemical Type• Plastic • Paper • Foil• Textile
– Mechanical Properties• Tensile• Elongation
– Thickness– Elongational Property– Machinability
• Material Properties– Moisture Absorption – Compatibility with
adhesive– Surface Properties
• Surface Energy• Surface Treatment
– Thermal Properties• Heat Sealing Properties• Melting Range/Point• Heat Stability
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Variable Parameter• Adhesive Properties
– Chemical Type– Solids– Thickness– Viscosity– pH– Morphology– MFI (Hot Melts)– Melting Range– Flow Properties
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Variable Parameter• Machine Properties
– Machine Type– Machine Output– Semi/Automatic– Feeding Arrangement– Guiding Mechanism– Spreader Roller– Heaters
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Laminating Materials• Films
– LDPE– HDPE– LLDPE– Coextr.– BOPP– PVC– PC– Nylon– PVDC– PET– Ionomer– Metallised
• Foils• Papers• Textile
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Laminating Webs• LDPE
– Light weight– flexible– stretchable– heat sealable at low temp.– good moisture barrier
• LLDPE– Tougher than LDPE– high tensile strength than LDPE– High Puncture resistance– High Elongation– good moisture barrier
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Laminating Webs• HDPE
– High Strength– High tensile properties– High Barrier properties for gas &
water– High tear in one direction
• PP– Low cost– Excellent moisture & gas barrier– High Puncture resistance– Low density
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Laminating Webs• PET
– High Transparency– Good Chemical Resistance– High tensile properties– High Barrier properties for gas &
water
• PVC– Strong Film– Excellent Clarity– Easy Sealing– Low Cost
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Laminating Webs• Nylon
– High Transparency– High Sealing Temp.– High tensile properties– High Barrier properties for gas &
flavor
• PVDC– Excellent Moisture & Gas Barrier– High Gloss– High tensile strength– Clear Film
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Laminating Webs• Aluminium Foil
– Excellent dead fold Properties– Easy tear – Good Flexibility– High Barrier properties for gas &
flavor
• Paper– Excellent Printability– High strength– Decorative property
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Adhesives• Water borne adhesive
– Acrylic Copolymer adhesives– Pressure Sensitive Adhesive– Starch based– Silicates
• Solvent Borne– PU adhesives
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Adhesives• Hot Melt (100 % solid)
– EVA based – PE based
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Lamination Techniques
1. Thermal Lamination2. Hot-melt Lamination3. Non-solvent Lamination4. Wet Lamination5. Dry Lamination6. Extrusion Coating / Lamination7. Co-extrusion Lamination
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Coating Methods for Adhesives
– Gravure Coating– Reverse Roll Coating– Knife Over Roll Coating– Metering Rod (Meyer Rod)
Coating– Slot Die (Slot, Extrusion)
Coating– Curtain Coating– Air Knife Coating
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Coating Methods for Adhesives• Gravure Coating
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Coating Methods for Adhesives• Reverse Roll Coating
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Coating Methods for Adhesives• Knife Over Roll Coating
"Gap Coating”
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Coating Methods for Adhesives• Metering Rod (Meyer
Rod) Coating
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Coating Methods for Adhesives• Slot Die (Slot, extrusion)
Coating• In extrusion coating and lamination,
resin is melted and formed into thin hot film, which is coated onto a moving, flat substrate such as paper, paperboard, metal foil, or plastic film.
• The coated substrate then passes between a set of counter-rotating rolls, which press the coating onto the substrate to ensure complete contact and adhesion
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Coating Methods for Adhesives• Slot Die (Slot, extrusion)
Coating
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Coating Methods for Adhesives• Immersion or Dip Coating
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Coating Methods for Adhesives• Curtain Coating
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Coating Methods for Adhesives• Air Knife Coating
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Co-extrusion Lamination
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Co-extrusion Lamination
• LDPE/HDPE/LDPE
• LDPE/Nylon/LDPE
• HDPE/Nylon/EVA
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Film Lamination (Cartons)• Advantages
– Will not yellow with age – Will not Flake off– Will not Crack– the ink is protected from cracking– It gives an odorless and wipeable
surface• Disadvantage
– High Cost
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Gloss Lamination (Cartons)• high shine• hard wearing• high performance gloss finish• Applications
– Company report , brochures, catalogs, book jacket covers, magazines, folders and point-of-sale displays
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Matt Lamination (Cartons)• Offers
– sophisticated non-reflective silky image to premium printed items such as annual reports
– suited to surfaces which need to be easily read such as wall maps
– prone to scuffing and should be handled with care.
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Lamination Applications
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Lamination Applications
thanks ……..