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DEPARTMENT OF TECHNICAL EDUCATION ANDHRA PRADESH

Name : Y.VENKAT REDDYDesignation : LecturerBranch : Packaging TechnologyInstitute : J.N.Govt.Polytechnic,RamanthapurYear/semester : IV - SemesterSubject Name : Packaging Materials - IISubject Code : PKG - 403Major topic : LaminationsSub Topic : IntroductionPresentation Duration : 100 Mins.Teaching aids : PPT, Animations, Photographs

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OBJECTIVES:

On the completion of the topic the

student will able to understand

The Concept of Laminations

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What is a Flexible Laminate..?

“A flexible film laminate is a combination of

two or more layers of different films

bonded together to form a multi-ply

structure.”

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Why Laminate?

There is no perfect, universal packaging material

Laminates assemble materials with individually desirable properties to create an optimum material

Laminate: A product made by bonding together two or more materials

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Mechanical properties tensile strength stiffness

coefficient of friction use temperatures

elongation formability

Laminate Properties

Barrier properties as required oxygen barrier essential oil barrier

water vapor barrier light barrier

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Laminate Properties

Sealabilitymost flexible packaging is heat sealed

most heat seals are polyethylene based

other polymers used more critical applications

Aesthetic appearanceclaritysurface glossreflective metallics

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Describing Packaging Laminate

Note:

Packaging laminate plies are always listed from the outside to the inside

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What is a Flexible Laminate? ..contd.

REV. PRINTED PET

3 LAYER POLY FILM

REV. PRINTED PET3 LAYER POLY FILM

REV. PRINTED PET

3 LAYER POLY FILM

MET. PET

REV. PRINTED PET

3 LAYER POLY FILMMET. PET

2 Ply Laminate

3 Ply Laminate

Lamination

Lamination

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Why Flexible Laminates..?

It combines the properties of individual

layers and gives options to develop a

packaging structure that suits the exact

requirements of the product to be packed.

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Typical Laminate Structures

PE co-extruded filmPET (10-12µ)

2-ply

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PE co-extruded filmm-PET (10-12µ)

Typical Laminate Structures

PET (10-12µ)

3-ply

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Typical Laminate Structures

Paper

PE Co-extruded film

PET

Al Foil

4-ply Laminate

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Types of Lamination Process

1. Adhesive Lamination

- Adhesive is applied between the two layers of substrates which are to be

bonded.

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Types of Lamination Process

2. Extrusion Lamination

- Extrusion coating where polymer film is extruded on a single web (2-ply laminate) or between 2 webs (multi-ply laminate).

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Types of Lamination Process

3. Heat & Pressure Lamination

- Usually adopted for Aluminium foil. Readymade film is pre-heated and combined with foil to form a composite.

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Components of a laminate

1. Printing Layer2. Barrier Layer3. Sealing Layer

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Summary

Laminate: A product made by bonding together

two or more materials

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Quiz

1.What are theTypes of UV/EB Laminating Adhesives

a) UV Laminating Adhesives

b) UV Pressure Sensitive Laminating Adhesives

c) UV Post Curing Laminating Adhesives

d) EB Laminating Adhesivese) All

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Frequently asked questions

1.What is a Flexible Laminate..?

2.What are the Laminate Properties ?

3.What are the Types of Lamination Process