1. WELCOME TO
MY PROJECT WORK

7. POLYCHLOPRENE SOLUTION (NEOPRENE)
Polychloroprene is a synthetic elastomer with many of the properties of natural rubber. These are prepared in number of grades depending on the crystallization rate.
PROPERTIES:
High bond strength
Limited plasticizer resistance
Easy handling
Can use with brush or spray
Difficult to remove if materials are contaminated
Long tack life
USES:
1.Fitting, laminating
2.Insole laminating
3.Insole rib attaching
4. Rubber and leather sole laying
5. Lasting
6.Heel covering

8. POLYURATHANE
Polyurethane is produced when a di-isocyanate having two isocyanate groups is reacted with a diol havig two hydroxyl groups.
PROPERTIES:
Flammable
Strong bond with most martial
Superior plasticizer resistance
Grease and oil resistance
High green strength but at least 48 hours needed to reach full strength
Difficult to remove if materials are contaminated
USES:
Sock attaching
Sole attaching

9. CLASIFICATION OF POLYURATHANE

10. SOLE Properties of an ideal soling material: Processing needs:
Low cost raw materials.
Cheap to process.
Easy to mould with good definition.
Form strong bonds with conventional adhesives
Can be recycled
Wearing needs:
Low density
High elasticity
High resilience
High flexibility
Good flex crack resistance
Good wet and dry slip resistance
Good abrasion (wear) resistance.
Good water resistance
Good rest resistance.
Good cushioning ability
Good shock absorption
Good ageing resistance.
Good appearance.

11. TYPES OF SOLING MATERIALS
Leather
Leather board
Resin rubber
Vulcanized rubber-solid -cellular
Crepe rubber
Thermoplastic Rubber (TR)-1.Solid , 2.Cellular
PVC (Solid)
PVC (Cellular)
PVC (Blends)
EVA (Cross-linked)
EVA (Thermoplastic)
Nylon (PA)
Polyester, solid, units
Polycarbonate.

12. ETHYLENE VINYL ACETATE (EVA)
Characteristic non-rubbery smell when new but this fades.
An extremely lightweight material,
Usually soft.
Available in all culours, but not translucent.
Generally good appearance,
Often found as a midsole (shock absorbing) layer in sports shoe,

13. Test report: For PU Applied adhesive Types of leather Sole Test result
(Kg)
Types of failure PU
Semi aniline corrected grain
EVA
1.25
Soling material failure
Protein finish
1.0
Bond failure
PU based Semi aniline
Corrected grain Pigmented patent
0.5
Protein finish bag leather
Aniline finish
0.75
Pigment finish corrected
grain
Semi aniline finish

14. For Neoprene Applied adhesive Types of leather Sole Test result (Kg)
Types of failure
Neoprene
Semi aniline corrected grain
EVA
2.25
Soling material failure
Protein finish
2.00
PU based Semi aniline
1.6
Corrected grain Pigmented patent
2.5
Protein finish bag leather
Aniline finish
2.0
Pigment finish corrected
grain
Semi aniline finish
1.0

15. CONCLUSION
In my project-The standard value of EVA sole bonding is 2.25kg/mm2 under the standard pressure.
I have experimented on different types of leather at laboratory of Bangladesh College of Leather Technology.
I have found the satisfactory result from semi aniline finished leather and corrected grain pigmented patent to the standard value and the results were 2.25&2.50kg/mm2 respectively.
So we can say, EVA sole is suitable for corrected grain pigmented patent leather.

16. THANK YOU