Made on modern powerful paper machines, with selected first-class pulp, Ahlstrom's electro insulating papers and semi-conducting papers provide the required purity and electrical security. These technical papers match IEC standards (International Electrotechnical Commission) - the specific classification for elctro materials, or have specific tailor-made features.

Building & Industrial

• Telecommunication cables and transformers - winding of copper wires
• Power cables and transformers - winding of copper wires
• Special cable constructions and transformers - winding of copper wires and shielding

Conference Papers on C/D from Coil Winding, Insulation & Electrical Manufacturing 2007 Inductica Conference available whilst stocks last. Topics include Motor Manufacturing, Insulation & Testing & Analysis. Also Conference Papers from previous Coil Winding Conferences + specialist Winding Techniques for Electric Motors book.

Order your copy now whilst stocks last

contact: coilwind@bournemouth-net.co.uk

Phenolic Kraft

Precision Products Group Phenolic resin impregnated tubes are constructed using a Dielectric Kraft paper that is pre-impregnated at a B stage. The paper is then wound into tube form and cured in an oven to become rigid. Resin impregnated tubes provide superior strength with a much thinner wall while also providing a high thermal barrier. Tubes hold dimensional characteristics in humid environments and can be easily fabricated as well. This product can often be used as a cost savings alternative to many types of aluminum, steel or plastic tubing.

DESCRIPTION:

50-2366 FR is a new thermally conductive polyurethane potting compound. This flexible system is designed for low stress on sensitive components during and after cure. 50-2366 FR polyurethane resin system is formulated for applications requiring low exotherm, low shrinkage, and excellent electrical properties.

This system is a good choice for potting applications containing surface mount components or any application requiring low stress, thermal conductivity and flame retardancy. 50-2366 FR is suitable for outdoor use.

50-2366 FR meets the stringent requirements of UL 94V0 flame out test.

FEATURES:

• Low viscosity
• Low stress on sensitive components
• Excellent electrical insulation
• Excellent water resistance
• Low shrinkage
• Thermal shock resistance
• Thermally conductive
• Flame retardant

TYPICAL SPECIFICATIONS:

• Standard Color - Black
• Viscosity, CPS

• Part A Polyol - 17,000
• Part B Isocyanate - 150
• Specific Gravity, 25°C

• Part A Polyol - 1.56
• Part B Isocyanate - 1.21
• Hardness, Shore D - 65
• Tensile strength, Psi - 2,200
• Elongation, % - 35
• Thermal Shock, - ^-65°C to + 130°C Passes
• Linear shrinkage, % - 0.5
• Linear Thermal Expansion, in/in/°C - 16.2 x 10^-5
• Thermal conductivity, BTU/hr/ft²/°F/in - 8
• Water Absorption, %

• 24 hours immersion - 0.074
• 7 days immersion - 0.18
• Fungus Resistant - Non – Nutrient
• Dielectric constant, 100 HZ - 4.3
• Dielectric Strength, Volts/mil - 540
• Volume Resistivity, ohm-cm - 2.1 x 10¹⁴
• Surface Resistivity, ohms - 6.0 x 10¹⁷
• Operating temperature range, °C - -65 to + 135°C

INSTRUCTIONS FOR USE:

1) Agitate Part A thoroughly to re-disperse fillers. Some settling during transit or storage is common.

2) By weight mix 100 parts 50-2366 FR Part A to 20 parts Part B. By volume 100 Parts A to 26 Parts B. Avoid using paper cups & wooden stirrers. Use glass or metal containers and stirrers.

3) Pour and cure according to one of the following schedules:

A. 25°C - 24 hours

B. 60°C - 2 hours

C. 100°C - 20-30 minutes

STORAGE & HANDLING:

50-2366 FR should be stored at 65 – 85°F in original tightly sealed containers. If containers are opened and the contents partially used, the material left in the container should be blanketed with dry nitrogen before sealing. Expected shelf life is 12 months in original unopened containers.

50-2366 FR does not contain TDI or MOCA. It also has a low vapor pressure which greatly reduces the vapor hazard and toxicity associated with other commercially available urethanes.

Please read MSDS before using this or any other chemical.

IMPORTANT:

The information in this brochure is based on data obtained by our own research and is considered accurate. However, no warranty is expressed or implied regarding the accuracy of these data, the results to be obtained from the use thereof, or that any such use will not infringe any patent. This information is furnished upon the condition that the person receiving it shall make his own tests to determine the suitability thereof for his particular purpose.

06/03

Saint-Gobain Composites offers a broad range of PSA tapes serving industrial and commercial users. Produced from a variety of film, fabric, metal, laminations or paper substrates with acrylic, silicone, or natural rubber adhesive systems, Saint-Gobain is uniquely able to produce outstanding, and sometimes proprietary products.

Their combined expertise in fabrics (CHEMFAB® Brand), films (NORTON® Brand), silicones (COHRlastic® Brand) and coatings gives you confidence in their team approach to providing solutions to critical applications.

Typical Applications

• Thermal / Plasma / Flame Spray
• Printed Circuit Board Fabricating
• Splicing and Seaming
• Slip, Release and Anti-Friction
• Heat Sealing
• General Purpose
• Electronic Assembly
• Electrical Insulation
• Shielding and Masking
• Aerospace / Aircraft Composite Bonding

Markets

Communication, Construction, Electrical/Electronic, Graphics, Industrial, Medical/Pharmaceutical/Laboratory, Mechanical, Military/Government, Optical, Transportation

For more details on all of our products, please consult our website.

UNFILLED LOW DUROMETER CLEAR

URETHANE ELASTOMERS

20-2305 Shore A 25

20-2350 Shore A 50

20-2360 Shore A 90

DESCRIPTION:

This two component urethane series are low durometer (25-90 Shore A), potting, casting, and encapsulating compounds. They are unfilled materials engineered to provide excellent hydrolytic stability and low moisture permeability. They have outstanding thermal cycling properties, low glass transition temperatures and low embedment stress to sensitive electronic components.

These unique urethane formulations maintain their integrity over a wide operating temperature range, -40°C to 125°C.

The low glass transition temperature of -72°C makes these urethanes ideal for low temperature potting applications.

FEATURES

*Maintains flexibility at low temperatures

*Thermal cycling stability

*Excellent electrical insulation

*Chemical resistance

*Low stress on sensitive components

*Hydrolytic stability

*Unaffected by moisture at high temperatures

*No shrinkage

TYPICAL SPECIFICATIONS:

20-2305

Standard color (Available Clear): Black

Specific gravity @ 25°C Resin : .91

Specific gravity @ 25°C Catalyst : 1.2

Mix Ratio, by weight (A:B): 100:10

Mix Ratio, by volume (A:B): 100:7.5

Hardness, Shore A: 25

Mixed viscosity, 25°C, cps: 4,200

Coefficient of thermal expansion, per °C: 2.28x10-4

Tensile strength, PSI: 150

Elongation, %: 60

Glass transition temperature , °C: -72

Pot life, 100 gram mass, 25°C: 1.5 hours

Dielectric constant, 25°C, 1khz: 4.5

Surface resistivity, 25°C, ohm: 1x10¹⁶

Volume resistivity, ohm-cm : 6x1016

Operating temperature range, °C: -40 to 125

INSTRUCTIONS FOR USE:

1) By weight, thoroughly mix according to mix ratio provided in above specifications. Two components should be carefully weighed in metal, plastic, or glass containers. Avoid using paper cups and wooden stirrers.

2) Mixed material can be degassed at 1 to 5 mm Hg to ensure bubble free castings. Containers should be large enough to allow frothing.

3) Cure according to one of the following cure schedules:

25°C - 24 Hours

45°C - 2.5 Hours

65°C - 1.5 Hours

85°C - 40 Minutes

STORAGE & HANDLING & SAFETY:

Store both components at 75-85°F in original containers. If the containers are opened and the contents partially used, the material left in the container should be blanketed with dry nitrogen before sealing. Carefully read Material Safety Data Sheets before using.

IMPORTANT:

The information in this brochure is based on data obtained by our own research and is considered accurate. However, no warranty is expressed or implied regarding the accuracy of these data, the results to be obtained from the use thereof, or that any such use will not infringe any patent. This information is furnished upon the condition that the person receiving it shall make his own tests to determine the suitability thereof for his particular purpose.

11/06