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2007-03-25 News Release
XIRAN polymers engineering plastics better alternative Polyscope XIRAN polymers, available as engineering plastics, deliver significant weight saving and reduced cycle times for automotive parts, paper and industrial applications.
Polyscope Polymers, Europe’s newest and foremost manufacturer and
supplier of Styrene Maleic Anhydride (SMA) co-polymers has introduced
its XIRAN* SMA product range. The product is manufactured in Europe, and
provides a significantly better alternative for users of existing SMA
products. In addition, the product's properties and performance may well
provide new opportunities for parts manufacturers who currently use other
materials such as Polyamide, PPLGF, PPEPDM or ABS blends. In recent tests
for a specific automotive application, XIRAN delivered a significant weight
saving compared to glass reinforced Polyamide as well as a considerable
decrease in cycle-time.
XIRAN is an impact modified Styrene Maleic Anhydride (SMA) co-polymer. The current XIRAN product line consists of General purpose “SM” grades and Extra rigid “SG” grades (glass fibre reinforced). For details of all grades see below. Polyscope’s XIRAN polymers are available as an engineering plastic with a medium molecular weight and a Maleic Anhydride content of 22-34%. Impact modified XIRAN SMA sets the standard for automotive interior components. Using proprietary technology developed by DSM and Eindhoven University, Polyscope Polymers is able to provide existing and new users of SMA with strong technical support and application development support. XIRAN processing conditions Key grades for the automotive industry include XIRAN SM240 and XIRAN SG320 (for details see below). XIRAN has processing parameters which are comparable to those of other engineering plastics, so can be processed on conventional types of injection moulding machines. All XIRAN grades can be moulded using conventional sprue and runner designs. Mould construction may be carried out with similar tool steels as used for ABS, ABS/PC and mPPO. General purpose XIRAN grades have a mould shrinkage of 0.5-0.8%, extra rigid Xiran grades have a mould shrinkage of 0.3-0.5%. The optimum melt temperature lies between 245°C and 275°C. Temperature
settings along the barrel of between 230°C and 250°C are recommended.
For optimum surface appearance the mould temperature should be between
60°C and 80°C. This will also keep internal stresses to a minimum. Polyscope Polymers - functionality and vision
Polyscope Polymers sets out to be more than a single materials supplier.
According to Polyscope Chairman Uwe Wascher, the company wants to be recognized
as an innovator in the automotive industry: "Our product is exciting,
because it offers our customers a new and better alternative to existing
materials. And our company is extremely flexible – so we can support
our customers’ productivity objectives as well as drive automotive
performance enhancements.” Overview of XIRAN grades General purpose “SM” grades They are also a cost-effective material in a broad range of applications in the electronics equipment, leisure, appliances, communications and lighting industries. These include white goods frames, (microwave) oven doors and panels, electric motor housings, chrome plated sanitary parts, camera components, car and mobile phones, kitchen appliances, laptop computers and office equipment. Through their outstanding electrical properties and excellent dimensional stability, XIRAN general purpose grades are also well suited for electromechanical components such as connectors, junction blocks, bobbins and switches. XIRAN SM200: a general purpose grade with the highest impact strength. It has high heat resistance and offers important secondary properties such as good chemical resistance and excellent dimensional stability. It displays high performance in painting, printing, hot foil stamping, ultrasonic welding and bonding techniques, and can be vacuum metallized and chrome plated . XIRAN SM300: a grade which offers higher heat resistance than XIRAN SM200 (at a slightly lower impact strength). It displays important secondary properties such as good chemical resistance, excellent dimensional stability and the possibility to chromium plate. Extra rigid “SG” grades (glass fibre reinforced) XIRAN extra-rigid grades are glass fibre reinforced materials with glass loads from 10 to 40%. Interaction between the polar SMA co-polymer and the glass fibres produces an unmatched property profile. Heat resistance varies from 125° to 150°C (Vicat B50). The extra rigid grades are well suited for automotive applications such
as painted mirror housings, windscreen demisters, front end carriers,
rear appliques, air intake grilles, underbody shields, and sunroof frames. XIRAN SG224 / SG320: As this grade gives the best surface quality of the extra-rigid grades, it is most suitable for painted automotive applications. It combines high heat resistance with good impact resistance and excellent flow behaviour. Polyscope Polymers specifically targets automotive manufacturers in Europe and China. *XIRAN (Styrene Maleic Anhydride (SMA) co-polymers) is a registered trademark
of Polyscope Polymers, Geleen, The Netherlands.
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