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  Leathers and Polymers

In the horological field, leather and polymers materials are submitted to severe conditions :

n Repeated mechanical stresses
n Friction and Wear
n Climatic effects ( oxygen, UV light,…)

n

Sweat, cosmetic products

n

Polluting agents

Example of a damaged leather strap by wearing

 
 

Cracked NBR
gasket due to ozone

This section is equipped with the requested facilities to perform all kind of tests, reproducing the broad range of real damages.

The most diverse families of synthetic materials are tested ; from elastomers to thermoplastic and thermosetting.

Some example of tests performed :

n Tensile and creep test
n Torsion bending cycles
n Hardness measurements, Shore A, D, IRHD hardness and microhardness

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Friction and wear tests
n Climatic tests
n Vulcanisation rate
n Cinetic of humidity absorption and release
n UV tests
n Oyxdation and ageing test

n

...

Mechanical tests on straps

 



Cyclic bending



Torsion cycles under tensile stress

 

Rubber components

 



IRHD microhardness measurements



Ozone ageing device

Our sections : 
- Consultancy in
electroplating
- Chemistry
- Chronofiable
- Leathers and polymers
- Materials
- Tribology

Our main services : 

- Allergenics and toxics
- Technical assistance
- Jewellery
- Chronofiable®
- Contaminants, cleanliness
- Corrosion
- Leathers
- JPR Kit
- Electroplating
- Climate tests
- Reliability
- Training
- Horological exterior
- Materials
- SEM
- Metallography
- Watch movements and watch heads
- Polymers, elastomers
- Coatings
- Wear tests

About nickel : 

- Nickel allergy
- Nickel allergy caused by jewels
- European regulation and standards
 
 
Copyright 2007 Laboratoire Dubois S.A.