Graphene nanotubes for colored rollers and conveyor belts: combining color and long service life

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TUBALL™ nanotubes provide stable anti-static performance to elastomer compounds made of silicone, rubber and PU while retaining mechanical properties and minimally impacting the host matrix. 

TUBALL™ graphene nanotubes are applied via the easy-to-use additive TUBALL™ MATRIX, which is a line of concentrates based on polymer and plasticizer carriers and pre-dispersed TUBALL™ graphene nanotubes. 

TUBALL™ graphene nanotubes: Good performance on all key parameters

In contrast to other conductive agents, TUBALL™ graphene nanotubes are a versatile conductive agent offering good performance on all key parameters

Technical and commercial benefits in silicone compounds

Parameter

Carbon black

Metallic
(paste form)

MWCNT

TUBALL™ MATRIX

Working dosage

10 wt.%

10 wt.%

3 wt.%

4 wt.%

Resistance requirements (Volume Resistivity)

105–107 Ω•сm

Resistance result
(Volume Resistivity)

106–109 Ω•сm

105–107 Ω•сm

105–107 Ω•сm

105–107 Ω•сm

Black dots on surface

only black available

none

only black available

none

Available color range

none

limited

none

wide

Resistance remains stable after abrasion on surface

no

yes

yes

yes

Influence on mechanical performance

strong negative

strong negative

strong negative

none

Influence to rheology

strong negative*

negative*

strong negative*

none

Dust formation during production

yes

yes

yes/none
(in case of masterbatch)

none

‘Hot spots’
(resistance varies on surface)

yes

possible

possible

none

Stable resistance over time

no

yes

yes

yes

Longer life cycle of compound and moulded parts

no

no

no

yes

Carbon release on surface

yes

none

none

none

Cost of anti-static property

comparable

high

comparable

comparable

* Formulation design required (adjustment of curing system)

Key benefit 1: Colored anti-static compounds

The wide range of color options makes it possible to provide various parts to the market where anti-static properites are required.

Silicones

Volume resistivity 103–105 Ω•cm. TUBALL™ loading 0.2–0.05%
Polyurethanes

OCSiAl internal PU formulation. ASTM D257 

Key benefit 2: Maintained mechanical and anti-static properties

TUBALL™ nanotubes, in contrast to traditional conductive agents, minimizes the impact on compound elasticity and tensile parameters, viscosity and rheological properties

Test results in various formulations: Mechanical properties

The extra-low dosage of TUBALL™ required in silica-based EPDM and NBR formulations allows the desired anti-static properties as well as improvements in tear strength and tensile performance to be achieved without degradation of elastic properties and hardness.

EPDM

NBR

PU


If it is necessary to use materials under conditions of deformation, it is important to maintain stable resistivity. Using TUBALL MATRIX, the resistivity is maintained within the target value after dynamic loads

High dynamic pressure applications – anti-static LSR with 1 wt.% TUBALL™ MATRIX 601

Key benefit 3: no carbon release, non-marking compounds

When using carbon black, due to its high concentration (10% and more) and because of the spherical shape of the particles, a phenomenon known in the industry as “carbon release” takes place, when the conductive additive is present on the surface of the sample.

In contrast, graphene nanotubes, owing to their greater length-to-diameter ratio, are not released to the surface. 

Key benefit 4: standard processing and mixing equipment

TUBALL MATRIX has to be processed with standard equipment broadly used by rubber roller manufacturers

Other benefits

  • Extremely low loadings of TUBALL™ that preserve properties
  • Ensure permanent and uniform electrical conductivity without “hot spots”
  • Maintain rheology of the uncured compound
    Maintained softness and elastic properties 


TUBALL MATRIX for LSR, RTV

601
Tuball
MATRIX 601
Non-crosslinkable conductive additive for liquid silicones

Application

Elastomers

Materials

Silicones, LSR, RTV

Carrier Media

Polydimethylsiloxane

MATRIX 601
602
Tuball
MATRIX 602
Crosslinkable conductive additive for liquid silicones

Application

Elastomers

Materials

Silicones, HCR, LSR, RTV

Carrier Media

Vinyl-terminated polydimethylsiloxane

MATRIX 602

TUBALL MATRIX for HCR

602
Tuball
MATRIX 602
Crosslinkable conductive additive for liquid silicones

Application

Elastomers

Materials

Silicones, HCR, LSR, RTV

Carrier Media

Vinyl-terminated polydimethylsiloxane

MATRIX 602
605
Tuball
MATRIX 605
Crosslinkable conductive additive for HCR silicones

Application

Elastomers

Materials

Silicones, HCR

Carrier Media

Vinyl-terminated polydimethylsiloxane

MATRIX 605

TUBALL MATRIX for solvent free PU systems

202
Tuball
MATRIX 202
Non-phthalate plasticizer based conductive additive for PU, PVC plastisol and phenolic solvent-free systems

Application

Resins & Composites

Materials

Phenolic, Polyurethane

Carrier Media

Plasticizer – fatty carboxylic acid ester derivative

MATRIX 202
301
Tuball
MATRIX 301
Conductive additive for solvent-free epoxy composites, coatings and polyurethane systems

Application

Resins & Composites

Materials

Epoxy, Polyurethane

Carrier Media

Surfactant – ethoxylated alcohol

MATRIX 301

TUBALL™ MATRIX for EPDM

Material

EPDM

Carrier Media

Polymer, Severely refined paraffinic mineral oils

Product

TUBALL™ MATRIX FOR NBR

Materials

NBRNBR

Carrier Media

Polymer, Dibutyl Phthalate

Polymer, Polar solvent

Product

MATRIX 623 beta


Please pay attention to processing guidelines for TUBALL™ MATRIX


Download PDF version:
PROCESSING GUIDELINES FOR CAST POLUYRETHANE
pdf
4.44 MB
PROCESSING GUIDELINES TUBALL MATRIX 601 602 ENG
pdf
6.39 MB
PROCESSING GUIDELINES TUBALL MATRIX 605 ENG
pdf
3.65 MB
PROCESSING GUIDELINES TUBALL MATRIX 610 beta ENG
pdf
8.88 MB

Or watch video instructions:

Conductive colored HCR: Processing guidelines for TUBALL™ MATRIX 605

Anti-static colored EPDM rubbers - Processing guidelines


Application cases

NBR conveyor belts
click to view case
NBR conveyor belts
Industrial Conveyor Belts
click to view case
Industrial Conveyor Belts
Mining Rollers
click to view case
Mining Rollers

Additional resources:

Conductive Silicones - LSR, RTV, HCR and PSA

Conductive elastomers: Prevent negative trade-offs in mechanical properties and color due to SWCNT


A new era?


OCSiAl Introduces New TUBALL MATRIX Products for Elastomers



Contact us to discuss your project specifications or to request a TUBALL MATRIX sample

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