Thermally conductive material

SARCON® is a wide range of heat-dissipating and thermal materials for cooling components. The products are available in many different forms, for example; heat-conducting Gap filler pads, thin film, grease types with and without silicone as well as caps and tubes. 

In the data sheet with product specifications, you will therefore get a comprehensive overview of all sarcon® solutions and their test methods.

Newtronic can offer a wide range of heat-dissipating and thermal materials with insulating properties for cooling components, joints, maps, etc.

We have a wide product range with a high thermal conductivity that is available in many different forms; Adhesives, potting gel, two-phase materials, thermal grease, heat-conducting paste, foil, thin film, tape, caps and tubes, phase change materials, and suspended heat-conducting pads of various sizes and shapes.

In the data sheet with product specifications, you get a comprehensive overview of the many options.

Thermally conductive adhesive systems. There are both room temperature vulcanizing one-part or two-part systems and accelerated heat curing systems. The thermal gradient is minimised through the excellent thermal contact due to their high bonding properties as well as high thermal conductivities. At the same time using screws, springs, clips as mechanic fasteners, becomes superfluous and the system remains at zero pressure. Mechanic tolerances can be compensated at no pressure. Above all they are used in applications having little space only and where their permitted weight is very limited. Materials with different expansion coefficients can easily be bonded, thus giving a reliable thermal link.

FEATURES AND AVAILABILITY:

• Very low thermal resistances through excellent thermal contacts
• Reliable strong adherence on uneven or hardly machineable surfaces
• Excellent compensation of mechanic tolerances
• No need of mechanic fasteners e.g. screws, springs, clips
• Silicone or Polyurethan
• One or two-part systems
• RTV or heat curing
• Addition or condensation curing (moisture)
• Dispensable from cartridges or pails

Thermally conductive PSA films are suitable for simple, effective and cost-effective thermal bonding of heat sinks to electrically insulated semiconductor components. They are mainly used in applications where space is limited and low weight is important. The adhesive films reduce thermal contact resistance to a minimum. Convex and concave unevenness of the contact surfaces and tolerances can be compensated very well. Materials with different coefficients of thermal expansion can be securely joined and thermally bonded well. Adhesive build-up and bonding technology eliminates the need for screws and staples as mechanical components.

FEATURES AND ADVANTAGES:

• Reliable adhesive strength on uneven or difficult-to-treat surfaces
• Mechanical fastening by screws, staples or rivets becomes unnecessary
• Good pre-applicability
• No migration compared to thermal paste
• No mixing of components and curing processes as with liquid adhesives
• Solvent-safe and solvent-free
• Contamination-free
• Process-safe uniform thickness
• Sheet or roll
• Kiss cut molded parts
• Die cut parts on roll
• Loose parts
• Acrylic or silicone
• Dielectric
• With or without insulating polymer
• Fast bonding or positionable
• Hard or soft
• High or low surface conformability
• Adhesive combinations

Thermally conductive caps and tubes made of silicone achieve an excellent thermal transfer between electronic packages and heat sinks while realizing a dielectric all-around insulation. Due to all around insulation dielectric creeping distances can be minimized. Being based on silicone, a long-term stability is ensured. Together with the property both to comply with the contact surfaces and to be compressible under pressure, the total thermal resistance is minimized.

FEATURES AND AVAILABILITY:

• Minimized dielectric creeping distances due to all around insulation
• High mechanic stability
• Reinforcement by glass fiber laminates
• Residue-free removal after use
• Suitable for different TO packages
• Different wall thicknesses

Thin Film With High Heat Conducting and High Electrical Insulation

Sarcon® Rubber type developed by our original studies are the epoch-making silicone rubber products with high insulative and thermally conductive properties as well as a high flame resistant or non-flammable property.

FEATURES AND AVAILABILITY:

• Has a thermal conductivity and excellent electrical insulation properties.
• Available for tubes, tapes, Cases and Die-cut Gaskets shapes to meet various applications.
• GTR, GHR, GSR, GAR; Heat conductive silicone rubber within Glass Fiber Cloth has excellent mechanical and physical characteristics.
• UL94 V-0 certified.
• Available with an Adhesive option.

CONFIGURATION:

SARCON® RUBBER TYPE’s versatility in thermal management applications is doubly enhanced by way of the variety of end-use configurations possible, and the many standard material formulations available in each.
The silicone rubber based materials offer other useful elements such as electrical insulation, protective covering and gasketing as integral features in most designs.

Two-part self-levelling potting gels help to fill gaps and tolerance spaces without permanent pressure. Their natural adhesiveness effectively allows for a stable thermal contact to all interfacing surfaces. They are based on two part additional curing silicone or silicone-free Polyurethan.

FEATURES AND AVAILABILITY:

• Additional cure
• Thermal conductivities up to 3.5 W/mK
• Low to high viscuous grades
• Self-levelling
• High dielectric strength
• Two part silicone or PU potting gels

By use of thermal grease convex and concave surface structures, stack up tolerances as well as roughnesses can widely be com­pen­sated.

FEATURES AND AVAILABILITY:

• Silicone or silicone-free.
• Pre-applicable printable or dispensable.
• Syringes, cartridges, pails.

SARCON® SG-07SL and SG-26SL are highly thermally conductive, non-reactive silicone-based greases that offer low thermal resistance and maintain a nonflowable composition. Unique binding agents and produet formulation ensure the lowest amount of bleed and evaporation. Suited for thin bond line applications.

SARCON® Th SG-07NS, SG-26NS and SG-42NS are non-silicone, polysynthetic-based thermal greases that have high thermal conductivity properties. lnfused with heat-conductive metal oxides, this nonmigrating material operates consistently in high temperatures. SARCON® nonsilicone greases offer all the benefits of a siliconebased compound without the problem of contamination.

FEATURES:

• Silicone and non-silicone formulations.
• Thermal conductivity up to 2.6 W/m-K.
• Low bleed and evaporation.
• No migration for non-silicone formulations over wide temperature range.
• Non-toxic.
• Thin bond lines 25µm(1mil}.
• Easy to apply and re-work.

APPLICATION:

• Standard de/de power converter and de/ae inverter.
• High performance CPUs.
• Between any heat generating semiconductor and heat sink.
• Custom power modules.
• Telecommunications and automotive electronics.

Graphite foils consist of more than 98% pure natural graphite or are processed of synthetic pyrolytic graphite. Due to their flake-like shape they show anisotropic thermal conductivities in-plane (x-y-plane) and vertically (z-direction). Heat is then transferred away from hot spots in a directed way and spread within the interface material. Their softness allows for a very good compliance to the contact surfaces, thus minimizing the thermal contact resistance. Their low density compared to copper or aluminum makes them ideal for applications where low weight is required. The very high temperature resistance allows for the use in extreme hot environments. Due to their high flexibility pyrolytic graphite foils can be folded up to 180 ° without break.

FEATURES AND AVAILABILITY:

• Thermal conductivities up to 1,950 W/mK in-plane and 25 W/mK in through z-direction
• Heat spreading from hot spots
• Low thermal contact resistance through good surface compliance
• Very low weight
• Silicone-free
• Extreme temperature range up to 400°C
• No dry-up, migrating, run out or pump out
• EMI-shielding through high electrical conductivity as side effect
• 180°C foldable (pyrolytic graphite)
• Sheet or Roll (natural graphite)
• Die cut parts
• Without or with tackiness
• With or without dielectric films (PEEK, PI, PET)
• With 2-side Phase Change coating

Under pressure thermally conductive foils achieve an excellent compliance to contact surfaces thus the total thermal resistance is minimized. At the same time a permanent electrical insulation is assured.

By coating of insulating films such as Polymide with silicone or adhesive the thermal contact resistance is minimized.

FEATURES AND AVAILABILITY:

• Thermal conductivities up to 8 W/mK
• High mechanic stability
• Residue-free removal after use
• Material thicknesses of 0.08 up to 1 mm
• Sheet or roll
• Die cut parts
• Kiss cut parts
• With or without adhesiveness
• Reinforcement by glass fiber laminates or Polymide

Thanks to their silicone-free polymer base, these gap-fillers do not emit volatile siloxanes, which can be important for sensitive electrical contacting or other requirements, e.g. paint repellency.

FEATURES AND AVAILABILITY:

• No volatile siloxanes
• Thermal conductivities up to 10 W/mK
• Optimized thermal resistance
• Thickness from 0.5 to 5 mm
• Highly elastic and conformable
• Customized shapes
• Material thicknesses up to 5 mm
• Made of mats as loose or kiss cut moldings
• Depending on type with mechanical reinforcement

Dispensable 2-component gap-fillers are suitable for compensating extreme tolerances and gaps, especially in non-planar buildups without pressure. Their thixotropic behavior allows accurate positioning and placed curing at room temperature or under heat.

Non-elastic, plastically deformable gap-fillers can thermally bridge large gaps and tolerances without permanent application of pressure.

Elastic gap-filler pads can thermally bridge large gaps and tolerances. Due to their restoring forces, they establish permanent contact.

FEATURES AND AVAILABILITY:

• Silicone (SI) or low siloxane (LV) without paint repellency
• gap filling with low or ~0 mechanical stress
• Thermal conductivities up to 20 W/mK
• Optimized thermal resistance
• Thickness from 0.2 to 10 mm
• Highly elastic and conformable
• Customized shapes
• Material thicknesses up to 10 mm
• Made of mats as loose or kiss cut molded parts
• Depending on type with mechanical reinforcement
• 2-component dispensable from buckets or cartridges
• Low siloxane types (LV)

HIGHLY CONFORMABLE AND HIGH HEAT CONDUCTING GEL MATERIALS SARCON® Thermal Gap Filler Pads are highly conformable and high heat conducting gel materials in a versatile sheet form. They easily fit and adhere to most all shapes and sizes of components, including rotrusions and recessed areas.

FEATURES:

• Gap filler materials are supplied in a fully cured state and remain pliable, easily conforming to minute surface irregularities.
• The basic Gap Filler Pad series can be further enhanced for special handling and die-cutting requirements.
• UL94 V-0 certified. (with exceptions)

More power and light weight. In the past, these two characteristics in electronics were mutually exclusive. Now, micro-electronics are just that, and in addition, need thermal management components to further complement these objectives.

SARCON® is an advanced silicone rubber with high thermal conductivity and superior flame-retardancy. By combining the inherent silicone rubber properties of heat resistance, electrical insulation and long-term aging into one compound, this universally applicable material can be made in an unlimited number of thermal management configurations.

During warm-up over phase change temperature, phase change materials (PCM) start filling up surface-specific roughnesses and/or unevenesses and expel any air enclosures from micro structures. Convex and concave surface structures and stack up tolerances can widely be compensated by the use of these materials. Their thixotropic nature prevents run-out. The thicknesses are characterized by high process reliability what among others makes these films ideal for replacing thermal greases.

TYPES:

1. PCM coated polymide film
2. PCM film
3. Aluminum film PCM coated
4. Pyrolytic graphite film PCM coated
5. Pre-applicable printable PCM compounds

FEATURES AND AVAILABILITY:

• Extremely low thermal resistances through optimum contact
• Silicon-free
• Easy pre-assembly
• Process reliable coating thicknesses
• Pre-applied and dry-to-the-touch printable types
• Ideal replacement of messy thermal grease
• Sheet or roll
• Kiss cut parts
• Die cut parts
• Without or with adhesiveness to cover all over or with partial adhesiveness
• Different thicknesses of phase change coating
• Printable compounds in cartridges