system eliminates high temperatures needed for heat-curing lsr grades

1
NEWS 4 Sealing Technology November 2013 Vertical burning tests were conducted on Meldin 7001 material to measure its flamma- bility characteristics. This testing programme determines the material’s tendency to extinguish or spread the flame once the material is ignited. UL94, a standard from Underwriters Laboratories Inc (UL), includes 12 flame classifications based on the results of small- scale flame tests. The Meldin 7001 grade is incorporated into the six classifications where materials are commonly used in manufacturing enclosures, structural parts and insulators and has been UL-listed with a “Plastic Recognition Yellow Card” (5VA and V-0). This denotes the material colour and bears information relative to specific polymeric materials which a com- pany has submitted to UL to be tested, and representative samples of the product have been evaluated by UL and meet its published and nationally recognised standards for safety. Aside from being UL94 flammability listed, the Meldin 7000 series has been qualified for numerous industry-specific and customer-spe- cific specifications. This product line has been known to consistently perform in challenging applications, ranging from aircraft and launch vehicle parts, automotive components to semi- conductor equipment parts. In other news, Rulon J material has been cer- tified according to ASTM E162-11 – “Surface Flammability of Materials Using a Radiant Heat Energy Source” and ASTM E662-09 – “Standard Method for Specific Optical Density of Smoke Generated by Solid Materials”, which meets the requirements of specification section T.S. 205.A.3.a, flammability and smoke emis- sion under Title 49CFR 238.103 for vehicle components. Because the material performs to ASTM FST flame and smoke standards it is considered to have flame spread and smoke concentration rates slow enough to give passengers sufficient time to disembark a vehicle more safely. Contacts: Saint-Gobain Seals Group, 7301 Orangewood Avenue, Garden Grove, CA 92841, USA. Tel: +1 714 995l 1818, Fax: +1 714 688 2800, Web: www.seals.saint-gobain.com Saint-Gobain Performance Plastics Nv, 22 Heiveldekens, 2550 Kontich, Belgium. Tel: +32 3 458 2828, Fax: +32 3 450 6601, Web: www.plastics.saint-gobain.com Tests reveal performance of fugitive emissions control packing J ames Walker & Co Ltd’s Supagraf Premier – fugitive emissions control packing for valves – produced an aver- age emission level of just 10.5 ppmV, with a maximum of 37 ppmV, over the five thermal and 1510 mechanical cycles specified by the API 622 test. The company says that emissions were simi- lar for both static and dynamic phases of the test and significantly this outstanding perfor- mance was achieved with no additional stem adjustments after installation. The API 622 (Second Edition) specifica- tion represents arguably the most arduous fugitive emissions test conditions for high performance valve-stem packing. This lat- est edition of this specification includes an increase from three to five thermal cycles plus 1510 mechanical cycles – replicating a service life of five years. Tested at United Valve, based in Houston, Texas, USA, Supagraf Premier graphite pack- ing has produced exceptional fugitive emis- sions performance for a graphite-based braided length-form packing, says James Walker. Manufactured from high-quality graphite ribbon, reinforced with Inconel 600 wire and impregnated with the firm’s proprietary lubrica- tion package, Supagraf Premier produced results well below the 50 ppmV industry benchmark performance level. This result, in combination with an excellent Class A ISO 15848 AH CO 2 test result, and proven performance to Shell 77-312 and TA Luft specifications, positions Supagraf Premier as the valve-stem packing of choice, claims the company. Contacts: James Walker & Co Ltd, Sales & Technical Support, 1 Millennium Gate, Westmere Drive, Crewe, Cheshire CW1 6AY, UK. Tel: +44 1270 536 000, Fax: +44 1270 536 100, Web: www.jameswalker.biz United Valve, 9916 Gulf Freeway, Houston, TX 77034-1045, USA. Tel: +1 713 944 9852, Fax: +1 713 944 5964, http://unitedvalve.com System eliminates high temperatures needed for heat- curing LSR grades E lmet Elastomere Produktions- und Dienstleistungs GmbH used K 2013, the international trade fair for plastics and rubber which was held during October in Düsseldorf, Germany, to display a new production system for processing liquid silicone rubber (LSR), which enables materials to be cured under UV light from rugged light- emitting diodes. According to the company, the new produc- tion concept for UV-curing liquid silicone rubber supports the use of cost-efficient mate- rial combinations in 2K injection-moulding. It eliminates the high curing temperatures required for conventional heat-curing LSR grades. This means that thermoplastics with a low melting point, including polypropylene (PP), polyethylene (PE) or polymethyl methacrylate (PMMA), are suitable for two-component injection-moulding with LSR as the soft com- ponent, whereas otherwise materials providing higher temperature resistance at higher prices are required, such as polyamide (PA) or polybu- tylene terephthalate (PBT). Contact: Elmet Elastomere Produktions- und Dienstleistungs GmbH, Tulpenstrasse 21, A-4064 Oftering, Austria. Tel: +43 7221 745770, Web: www.elmet.com Medical-grade epoxy features high glass transition temperature E ffectively used in medical-device manufacturing, Master Bond UV10TKMed is a high-viscosity UV sys- tem for bonding, sealing and coating applications that passes United States Pharmacopoeia (USP) Class VI test- ing. It also meets the requirements of ISO 10993-5 for cytotoxicity. This one-part system is optically clear and has a high glass transition temperature that exceeds 140°C. It resists repeated sterilisation, including radiation, ethylene oxide, chemical sterilants and especially autoclaving. It has a service temperature of -51°C to 232°C (-60°F to +450°F), and combines dimensional stability with low shrinkage upon curing. The system James Walker & Co Ltd’s Supagraf Premier – fugitive emissions control packing for valves – produced an average emission level of just 10.5 ppmV, with a maximum of 37 ppmV, over the five thermal and 1510 mechanical cycles specified by the API 622 test.

Upload: vukhanh

Post on 30-Dec-2016

215 views

Category:

Documents


0 download

TRANSCRIPT

NEWS

4Sealing Technology November 2013

Vertical burning tests were conducted on Meldin 7001 material to measure its flamma-bility characteristics. This testing programme determines the material’s tendency to extinguish or spread the flame once the material is ignited.

UL94, a standard from Underwriters Laboratories Inc (UL), includes 12 flame classifications based on the results of small-scale flame tests. The Meldin 7001 grade is incorporated into the six classifications where materials are commonly used in manufacturing enclosures, structural parts and insulators and has been UL-listed with a “Plastic Recognition Yellow Card” (5VA and V-0). This denotes the material colour and bears information relative to specific polymeric materials which a com-pany has submitted to UL to be tested, and representative samples of the product have been evaluated by UL and meet its published and nationally recognised standards for safety.

Aside from being UL94 flammability listed, the Meldin 7000 series has been qualified for numerous industry-specific and customer-spe-cific specifications. This product line has been known to consistently perform in challenging applications, ranging from aircraft and launch vehicle parts, automotive components to semi-conductor equipment parts.

In other news, Rulon J material has been cer-tified according to ASTM E162-11 – “Surface Flammability of Materials Using a Radiant Heat Energy Source” and ASTM E662-09 – “Standard Method for Specific Optical Density of Smoke Generated by Solid Materials”, which meets the requirements of specification section T.S. 205.A.3.a, flammability and smoke emis-sion under Title 49CFR 238.103 for vehicle components.

Because the material performs to ASTM FST flame and smoke standards it is considered to have flame spread and smoke concentration rates slow enough to give passengers sufficient time to disembark a vehicle more safely.

Contacts:

Saint-Gobain Seals Group, 7301 Orangewood Avenue,

Garden Grove, CA 92841, USA. Tel: +1 714 995l 1818,

Fax: +1 714 688 2800, Web: www.seals.saint-gobain.com

Saint-Gobain Performance Plastics Nv, 22 Heiveldekens,

2550 Kontich, Belgium. Tel: +32 3 458 2828, Fax: +32

3 450 6601, Web: www.plastics.saint-gobain.com

Tests reveal performance of fugitive emissions control packing

James Walker & Co Ltd’s Supagraf Premier – fugitive emissions control

packing for valves – produced an aver-age emission level of just 10.5 ppmV, with a maximum of 37 ppmV, over the five thermal and 1510 mechanical cycles specified by the API 622 test.

The company says that emissions were simi-lar for both static and dynamic phases of the test and significantly this outstanding perfor-mance was achieved with no additional stem adjustments after installation.

The API 622 (Second Edition) specifica-tion represents arguably the most arduous fugitive emissions test conditions for high performance valve-stem packing. This lat-est edition of this specification includes an increase from three to five thermal cycles plus 1510 mechanical cycles – replicating a service life of five years.

Tested at United Valve, based in Houston, Texas, USA, Supagraf Premier graphite pack-ing has produced exceptional fugitive emis-sions performance for a graphite-based braided length-form packing, says James Walker.

Manufactured from high-quality graphite ribbon, reinforced with Inconel 600 wire and impregnated with the firm’s proprietary lubrica-tion package, Supagraf Premier produced results well below the 50 ppmV industry benchmark performance level.

This result, in combination with an excellent Class A ISO 15848 AH CO2 test result, and proven performance to Shell 77-312 and TA Luft specifications, positions Supagraf Premier as the valve-stem packing of choice, claims the company.

Contacts:

James Walker & Co Ltd, Sales & Technical Support,

1 Millennium Gate, Westmere Drive, Crewe,

Cheshire CW1 6AY, UK. Tel: +44 1270 536 000,

Fax: +44 1270 536 100, Web: www.jameswalker.biz

United Valve, 9916 Gulf Freeway, Houston,

TX 77034-1045, USA. Tel: +1 713 944 9852,

Fax: +1 713 944 5964, http://unitedvalve.com

System eliminates high temperatures needed for heat- curing LSR grades

Elmet Elastomere Produktions- und Dienstleistungs GmbH used K 2013,

the international trade fair for plastics and rubber which was held during October in Düsseldorf, Germany, to display a new production system for processing liquid silicone rubber (LSR), which enables materials to be cured under UV light from rugged light- emitting diodes.

According to the company, the new produc-tion concept for UV-curing liquid silicone rubber supports the use of cost-efficient mate-rial combinations in 2K injection-moulding. It eliminates the high curing temperatures required for conventional heat-curing LSR grades.

This means that thermoplastics with a low melting point, including polypropylene (PP), polyethylene (PE) or polymethyl methacrylate (PMMA), are suitable for two-component injection-moulding with LSR as the soft com-ponent, whereas otherwise materials providing higher temperature resistance at higher prices are required, such as polyamide (PA) or polybu-tylene terephthalate (PBT).

Contact:

Elmet Elastomere Produktions- und Dienstleistungs

GmbH, Tulpenstrasse 21, A-4064 Oftering, Austria.

Tel: +43 7221 745770, Web: www.elmet.com

Medical-grade epoxy features high glass transition temperature

Effectively used in medical-device manufacturing, Master Bond

UV10TKMed is a high-viscosity UV sys-tem for bonding, sealing and coating applications that passes United States Pharmacopoeia (USP) Class VI test-ing. It also meets the requirements of ISO 10993-5 for cytotoxicity.

This one-part system is optically clear and has a high glass transition temperature that exceeds 140°C. It resists repeated sterilisation, including radiation, ethylene oxide, chemical sterilants and especially autoclaving. It has a service temperature of -51°C to 232°C (-60°F to +450°F), and combines dimensional stability with low shrinkage upon curing. The system

James Walker & Co Ltd’s Supagraf Premier – fugitive emissions control packing for valves – produced an average emission level of just 10.5 ppmV, with a maximum of 37 ppmV, over the five thermal and 1510 mechanical cycles specified by the API 622 test.