ELASTOMERS COMPARATIVE – TPE TPV THERMOPLASTICS ELASTOMER - HCR HEAT CURING ELASTOMERS

On 08-12-2014

ELASTOMERS COMPARATIVE – TPE TPV THERMOPLASTICS ELASTOMER - HCR HEAT CURING ELASTOMERS

ELASTOMER
The WIKIPEDIA presentation http://fr.wikipedia.org/wiki/%C3%89lastom%C3%A8re will give you a ‘free’ introduction overview, well show and structured .

TPE TPV ELASTOMER THERMOPLASTICS
Materials obtained from a "soft phase" and a "hard phase"; presence of «rigid segments»
organized into rigid areas (reversible network) and «flexible segments "that can undergo
large deformations at room temperature. The 2 types of phases are not « mixed ».
The TPE will characterize by the presence of « spheres, cylinders or lamellae ».
qualified bonds 'H' when rubbers « THERMOSETS» HCR will use « Covalent » ones.

The TPE have flexibility characteristics, high strength but will have less performances of resistance than heat rubberized materials (HCR); Materials do not require vulcanization or cross-linking.
At " room " temperature near properties of rubber compounds.

There are 2 major families of TPE :
TPO - TPV: physical 2 polymer blend (current ex: PP - EPDM)
Common « plus »: good resistance to UV, 'best' DRC (review RUBBER COMPRESSION SET on http://www.chevalier-cleret.com/event/rubber-compression-set.html) for TPV.
TPA-TPC-GST-TPU: copolymers obtained by copolymerization (current ex: Polystyrene-
Polybutadiene).
Common «plus»: good resistance to abrasion, ozone, UV, and good chemical outfits with oils and certain hydrocarbons.

TPE are still far from being able to replace all HCR (curable rubbers), in the «technical» applications.

Processability: on processing equipment of thermo plastic.

Recyclability: possible

CHEVALIER - CLERET - ELTEC have not voluntarily developed 'values added'
in the transformation of these families of polymers "TPE THERMO PLASTICS ELASTIC"
(significantly less technical than material below) wishing to retain all its resources
(human, investments) in the heart of its historic
businesses.

 

HCR ELASTOMERS (HOT CURRED - RUBBER)
Materials (polymers) obtained from a discontinuous mix and sequence, of 10 to 20 'substances' some of which are essential to create 'bridges', to «protect' structures, to 'soften' or to 'strengthen'» basic  elastomer (case of black type of carbon or silica e.g. loads).
The possibilities offered by the choice of the monomer and co monomer in the 'formulation' (and the type of Catalysis: sulphur, oxides, Platinum...) explain that a very large number of synthetic rubbers and mixtures/compounds
are feasible or available on the market.
The most common are: NR, SBR, BUTHYL, NBR, HNBR, EDPDM, FKM - FPM, silicone-QMV-LSR-PMVQ, PU, CR,…etc

HCR have excellent chemical resistance and electrical insulation.
They have flexibility characteristics - elasticity, abrasion resistance... very high, high to low (HCR SILICONES) and high performance see very high temperatures (silicone, FKM) and excellent CS (review RUBBER COMPRESSION SET http://www.chevalier-cleret.com/event/rubber-compression-set.html ) what makes them essential for sealing and cushioning applications.
These materials require a vulcanization (joint temperature action 150 to 200° C and pressure)‚ you can browse RUBBERS AND SILICONES VULCANIZATION http://www.chevalier-cleret.fr/reunion/la-vulcanisation-des-caoutchoucs-et-des-silicones.html.

Processability: on rubber processing equipment.

Recyclability : ‘no’

“Cleanliness" : exceptional WITH SILICONES uses

The transformation of these highly technical polymers (having from very) high mechanical performance, holding hot.. .but also of remarkable properties of chemical outfits... because of their chemical structure "bridged" and "stable") molding is the heart of the trades of CHEVALIER - CLERET - ELTEC since the origin of the companies. High levels of investment human, machinery and equipment and R& D will guarantee youfind in CHEVALIER- CLERET - ELTEC a long-term partner for your developments.

LITERATURE supplements free of access and well illustrated

(links in Fr : use translator of your navigator)

ELASTOMERS - TPE TPV THERMO PLASTICS ELASTOMER

WIKIPEDIA : THERMOPLASTIC ELASTOMER
SNCP : THERMOPLASTIC ELASTOMER

ELASTOMERS - HCR ELASTOMERS HOT CURRED - RUBBER (rubber and silicone)

SYNTHETIC RUBBER
SILICONE

VULCANIZATION
WIKIPEDIA : VULCANIZATION

GENERAL

http://www.ucaplast.fr/presentation-ucaplast/caoutchouc/historique.html
SYNDICAT NATIONAL DU CAOUTCHOUC ET DES POLYMERES

 

CHEVALIER CLERET ELTEC group is member UCAPLAST http://www.ucaplast.fr/
and co operates regularly with SNCP http://www.lecaoutchouc.com/.

 

For more information, contact jm.oudot@chevalier-cleret.fr

The English version was made using an "online translator" : We apologize for the “quality” which can be in some cases approximate ; read the "original" on http://www.chevalier-cleret.fr/reunion/comparatif-elastomeres-tpe-tpv-elastomeres-thermo-plastiques-evc-elastomeres-vulcanisables-a-chaud.html