slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Introduction For over 60 years foam cores have been utilized for sandwich construction. PowerPoint Presentation
Download Presentation
Introduction For over 60 years foam cores have been utilized for sandwich construction.

Loading in 2 Seconds...

play fullscreen
1 / 26

Introduction For over 60 years foam cores have been utilized for sandwich construction. - PowerPoint PPT Presentation


  • 152 Views
  • Uploaded on

Expandable Epoxies A Versatile Material Pradip K. Dubey Aditya Birla Chemicals (Thailand ) Ltd – Epoxy Division (Formerly Thai Epoxy). Introduction For over 60 years foam cores have been utilized for sandwich construction.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Introduction For over 60 years foam cores have been utilized for sandwich construction.' - lance-oconnor


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Expandable Epoxies A Versatile MaterialPradip K. DubeyAditya Birla Chemicals (Thailand ) Ltd – Epoxy Division(Formerly Thai Epoxy)

TRFA Annual Meeting- Montreal, Canada

slide2
Introduction

For over 60 years foam cores have been utilized for sandwich

construction.

PVC, PS, SAN, PUR, PIR, PMI, and PEI foams have been developed over the years

All types of the foams are used in sandwich structure for

Light weight

High Stiffness and

High strength

TRFA Annual Meeting- Montreal, Canada

slide3
Sandwich Principle

Sandwich structure provides high stiffness in bending (flexural rigidity)

Foam core of sandwich do not allow increase in weight significantly.

D = EI = ‘Ef’ bt3 + ‘Ef’btd2 + ‘Ec’bc3

6 2 12

Where:

Ef = Elastic modulus of the skin

Ec = Elastic modulus of the core

b = Width of the beam

d = Distance between skins

t = Thickness of skin

c = Core thickness

TRFA Annual Meeting- Montreal, Canada

slide4
Sandwich principle

If skins are relatively thin compared to core ( d/t >6) and

core material is considerably weaker than the skins (‘Ef’/ ‘Ec’ . td2/c3 >17)

the equation can be reduced to

D = EI = ‘Ef’btd2

2

From the equation, it is distance between skins which contribute for

flexural rigidity not the strength of the core material.

TRFA Annual Meeting- Montreal, Canada

slide5
Sandwich Vs Single skin fiber glass structure

Single skin -tSandwich-2tsandwich-4t

Weight: 1 Weight: 1.06 Weight: 1.09

Strength: 1 Strength: 3.5 Strength: 9.25

Stiffness: 1 Stiffness: 7 Stiffness: 37

By increasing the cross sectional geometry

Stiffness increase 37 times.

Flexural strength increase 9 time.

Marginal change in weight.

TRFA Annual Meeting- Montreal, Canada

salient features of the epoxy foam
Two component liquid system

Longer shelf life

Flexible working time

Easy processibility

Adaptable to any shape and size

Close cells, uniform, and homogeneous

High strength and thermal stability

Excellent electrical insulation property

Excellent adhesion with most of the substrates

Nonhazardous

Variable density ( 150-400kg/m3)

Salient features of the epoxy foam

TRFA Annual Meeting- Montreal, Canada

epotec expandable epoxy
Epotec Expandable Epoxy

TRFA Annual Meeting- Montreal, Canada

epotec expandable epoxy mechanical properties
Epotec Expandable Epoxy (Mechanical properties)

TRFA Annual Meeting- Montreal, Canada

epotec expandable epoxy electrical properties
Epotec Expandable Epoxy(Electrical properties)

TRFA Annual Meeting- Montreal, Canada

epotec expandable epoxy1
Epotec Expandable Epoxy

New high strength grades containing milled glass fiber

TRFA Annual Meeting- Montreal, Canada

comparative properties
Comparative Properties

TRFA Annual Meeting- Montreal, Canada

applications of epoxy foam
Composite (core material)-Surf boards, Boats, Tabletops, Hockey sticks, Helmets, Wind mill blades

Civil and construction- Crack filling, Pedestrian bridge/Light weight bridges, FRP doors and furniture, Manufacturing of molded panels

Electrical and Electronics- Sensors, Capacitors, Encapsulation of electronic circuit

Tooling- Prototype, Molds, Fixtures

Adhesive- Light weight structures, In combination with other core material, Fixing tiles

Applications of Epoxy Foam

TRFA Annual Meeting- Montreal, Canada

slide15

Cross Section of Surf Board

Top Epoxy Laminate

Epoxy Foam Core

Epoxy Foam

Intermediate Epoxy Laminate

Fins from Epoxy Laminate

TRFA Annual Meeting- Montreal, Canada

slide16

Cross Section of Surf Board

Epoxy Foam used as Core & Adhesives

TRFA Annual Meeting- Montreal, Canada

slide17

Cross Section of Helmet

Epoxy Foam Between SHELL & LINER

TRFA Annual Meeting- Montreal, Canada

slide18

Composite Kayak

Top Epoxy Laminates

Epoxy Foam

Inner Epoxy Laminates

TRFA Annual Meeting- Montreal, Canada

slide19

Cross Section of Boat

Osmosis Coating

Epoxy Foam

Cove & Bead Joint

Balsa Wood Strip

TRFA Annual Meeting- Montreal, Canada

slide20

Light Weight Floating Dock

TRFA Annual Meeting- Montreal, Canada

slide21

Hockey Stick – Field & Ice Hockey

Hockey Core From Epoxy Foam

TRFA Annual Meeting- Montreal, Canada

slide22

Light Weight Table Tops

Top Epoxy Laminate

Epoxy Foam for Light Weight

TRFA Annual Meeting- Montreal, Canada

slide23

Crack Filling by Epoxy Foam

Crack on concrete floor

Filled Crack

After curing of crack filling Chemical there is shrinkage and hair line crack on both side joints

TRFA Annual Meeting- Montreal, Canada

conclusion
Epotec Expandable epoxies are easy to work and do not involve hazardous/toxic chemicals

Unlike thermoplastics foams they can be molded in-situ on site in complex shapes and sizes and avoid transportation as well as further machining

Simplify processing steps involving additional adhesives in some of the applications

Conclusion

TRFA Annual Meeting- Montreal, Canada

slide26
THANK YOU

For further information please contact us at www.epotec.info or www.adityabirlachemicals.com

TRFA Annual Meeting- Montreal, Canada