- Email: [email protected]
Polyamide compound meets stringent rocker cover requirements
/I
APPLICATIONS
lews
Polyamide c o v e r requirements High performance polyamide Technyl A 218 MT15 V25 from Rhodia Engineering Plastics has been specified for the rocker cover of the new 75 kW Volkswagen Passat and Audi A4 engines. The manufacturer, Woco Franz JosefWolf & Co. of Bad Soden-Salmiinster in Germany, claims a number of special features for the rocker cover. These include that it is acoustically de-coupled from the cylinder head for effective noise reduction. The cover is fixed to the cylinder head by only eight screws despite the length resulting from the four cylinders in-line configuration. The oil separator is incorporated in the rocker cover by ultrasonic welding. The rocker covers are supplied in the standard black colour, as well as moulded in natural material, to be painted silver and tampon printed later. Paint adhesion is said to be good.
The compound is a 25% glassfibre and 15% mineral reinforced polyamide 6.6. Rhodia Engineering Plastics says that it fully meets the requirements of the mechanical properties for the rocker cover, even at elevated temperatures, and ensures a low creep tendency that contributes to the long in-service life of the part. The Technyl compound is also claimed to have low warpage that is essential to the quality of the injection m, ensure
required in this application. The company adds that
Woco in the form of component testing and optimization of the injection moulding
these simulations the de-coupling elements and elastomer g,~asketwere researched. /idditionally, a modal analysis and a prediction of the sound emission were performed, while the strength and stiffness of the rocker cover were optimized. Moulded prototype components were tested at both the Woco and Rhodia facilities. These tests included heat-ageing resistance, temperature shock tests and leakage measurements, to demonstrate the ability of the rocker cover to withstand under-the-bonnet operating temperatures. A simulation of the actual service life using hot motor oil showed that the compound had the required geometrical stability and sealing properties. Contact: Rhodia Engineering Plastics Tek +33 472 89 27 53 Fax: +33 472 89 27 35 E-mail: christine, bourguignon @ eu. rhodia, com
Flame retardant HIPS aid recycling in electronics RTP Company has introduced a new line of flame retardant, high-impact polystyrene (HIPS) thermoplastics that meet various flame ratings. The company says that the materials provide good colourability and physical properties, and are fully recyclable. According to the company, HIPS products can be customized to meet UL94 V-0 and V-2, and/or the IEC 695-2-1 Plastics Additives &
Glow Wire test commonly required for the European market. The effectiveness of the flame retardant technology used in these compounds minimizes the impact on physical properties, while achieving the stringent V-0 rating. The company adds that these products also comply with the German Hazardous Substance Ordinance and meet the substitution requirement of the latest
draft of the EU WEEE/ROS Directive on recycling, which calls for the substitution of PBDE and PBB type FR systems. Moulders and OEMs are both facing new requirements to recycle materials due to increased production of electronics and electronic equipment. RTP Company says that extensive research has been carried out to ensure that there are
CompoundingJuly~August2001
I4
good recycling characteristics in products with this flame retardant technology. The company adds that the HIPS thermoplastics are sold unfilled or they can be modified for wear resistance, structural reinforcement, conductivity or colour. Contact: RTP Company Tel: +1 507 454 6900 Email: [email protected]
APPLICATIONS
lews
Polyamide c o v e r requirements High performance polyamide Technyl A 218 MT15 V25 from Rhodia Engineering Plastics has been specified for the rocker cover of the new 75 kW Volkswagen Passat and Audi A4 engines. The manufacturer, Woco Franz JosefWolf & Co. of Bad Soden-Salmiinster in Germany, claims a number of special features for the rocker cover. These include that it is acoustically de-coupled from the cylinder head for effective noise reduction. The cover is fixed to the cylinder head by only eight screws despite the length resulting from the four cylinders in-line configuration. The oil separator is incorporated in the rocker cover by ultrasonic welding. The rocker covers are supplied in the standard black colour, as well as moulded in natural material, to be painted silver and tampon printed later. Paint adhesion is said to be good.
The compound is a 25% glassfibre and 15% mineral reinforced polyamide 6.6. Rhodia Engineering Plastics says that it fully meets the requirements of the mechanical properties for the rocker cover, even at elevated temperatures, and ensures a low creep tendency that contributes to the long in-service life of the part. The Technyl compound is also claimed to have low warpage that is essential to the quality of the injection m, ensure
required in this application. The company adds that
Woco in the form of component testing and optimization of the injection moulding
these simulations the de-coupling elements and elastomer g,~asketwere researched. /idditionally, a modal analysis and a prediction of the sound emission were performed, while the strength and stiffness of the rocker cover were optimized. Moulded prototype components were tested at both the Woco and Rhodia facilities. These tests included heat-ageing resistance, temperature shock tests and leakage measurements, to demonstrate the ability of the rocker cover to withstand under-the-bonnet operating temperatures. A simulation of the actual service life using hot motor oil showed that the compound had the required geometrical stability and sealing properties. Contact: Rhodia Engineering Plastics Tek +33 472 89 27 53 Fax: +33 472 89 27 35 E-mail: christine, bourguignon @ eu. rhodia, com
Flame retardant HIPS aid recycling in electronics RTP Company has introduced a new line of flame retardant, high-impact polystyrene (HIPS) thermoplastics that meet various flame ratings. The company says that the materials provide good colourability and physical properties, and are fully recyclable. According to the company, HIPS products can be customized to meet UL94 V-0 and V-2, and/or the IEC 695-2-1 Plastics Additives &
Glow Wire test commonly required for the European market. The effectiveness of the flame retardant technology used in these compounds minimizes the impact on physical properties, while achieving the stringent V-0 rating. The company adds that these products also comply with the German Hazardous Substance Ordinance and meet the substitution requirement of the latest
draft of the EU WEEE/ROS Directive on recycling, which calls for the substitution of PBDE and PBB type FR systems. Moulders and OEMs are both facing new requirements to recycle materials due to increased production of electronics and electronic equipment. RTP Company says that extensive research has been carried out to ensure that there are
CompoundingJuly~August2001
I4
good recycling characteristics in products with this flame retardant technology. The company adds that the HIPS thermoplastics are sold unfilled or they can be modified for wear resistance, structural reinforcement, conductivity or colour. Contact: RTP Company Tel: +1 507 454 6900 Email: [email protected]