Product guide and properties

Transcription

1 Delrin ONLY BY DUPONT acetal resin Product guide and properties Registered trademarks of E.I. du Pont de Nemours and Company The miracles of science is a trademark of E.I. du Pont de Nemours and Company

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3 Product Portfolio DELRIN acetal resins are made by the polymerisation of formaldehyde. They have built up a worldwide reputation for reliability in all types of engineering components over more than 30 years since DuPont discovered and introduced DELRIN. They are used in the automotive, appliance, sports, industrial engineering, electronics and consumer goods industries. The chemical composition and highly crystalline structure of DELRIN acetal offer a unique combination of properties not available with metal or other plastics. DELRIN characteristics include: High tensile strength, impact resistance and stiffness; Outstanding fatigue resistance, unmatched by other plastics; Excellent resistance to moisture, gasoline, lubricants, solvents and many other neutral chemicals; Excellent dimensional stability; Good electrical insulating characteristics; Creep resistance; Low friction; Wide end-use temperature range, down to very low temperatures. We do not recommend using DELRIN in strong acids or bases outside the range of ph 4 to 9, or under constant exposure to pressurised hot water or vapour. DELRIN should also not be used in medical applications involving permanent implantation in the human body. Elongation at Break, % (ISO 527) Combination of stiffness and toughness DELRIN compared to acetal copolymers 0 DELRIN 100ST DELRIN 100T DELRIN 100 DELRIN 500T DELRIN Tensile Modulus, MPa (ISO 527) Standard DELRIN Toughened DELRIN Standard acetal copolymers Toughened acetal copolymers For other medical applications, see DuPont Medical Caution Statement, H All grades of DELRIN are classed as HB (horizontal burning) by Underwriters Laboratories (UL 94). The data in the attached tables represent an important basis for material selection for engineering applications. They can, however, not replace tests with the final part. Your DuPont representative is ready to give you more detailed design support if required. DELRIN P DELRIN P resins were introduced in 1992 to offer an advanced generation of easy processing resins. They are formulated to increase the processing window of acetals in demanding and critical hardware environments (e.g. hot runner tools) and to offer outstanding thermal stability in injection operations. The stabilizer concept of DELRIN P was developed to obtain the best balance of thermal and oxidative stability, good flow properties, thermal stability of coloured resins and chemical resistance. More importantly, it maintains the classic advantage of acetal over copolymer in physical properties. Therefore, DELRIN P offers more freedom in application engineering and a wider operating window in injection. Due to the excellent thermal stability of DELRIN P, the key advantages for the moulder are deposit free, higher stability of coloured products, as well as more regrind passes. 1

4 DELRIN ELEVEN The family of DELRIN ELEVEN Series has been developed as an extension to the range of DELRIN P resins. These new formulations include the same proprietary thermal stabilizers as the DELRIN P resins. Therefore the outstanding ease of processing of DELRIN P is maintained with the new DELRIN ELEVEN Series. In what way is the new ELEVEN Series different from current DELRIN resins? There are several important improvements: Firstly, they are more crystalline than other DELRIN grades, so there is less warpage and greater out-of-the-mould dimensional stability. Secondly, the problem of hidden voids has been virtually eliminated, so you can design parts with just the thickness needed for the function, without overcompensating for possible weak spots. Thirdly, the DELRIN ELEVEN Series are even more stable in the presence of hydrocarbons, able to withstand prolonged immersion in fuels and oils, making them ideal for automotive and other fuel system applications. Swelling of DELRIN ELEVEN in fuel Injection-moulded samples of different acetal resins were immersed in fuel CM-15 (15% methanol + 85% fuel C, where fuel C is 50% toluene + 50% iso-octane) for 500 hours at 60 C. The length, weight and tensile properties of the samples, as measured before and after immersion, are shown in Fig. 1. In all cases, some fuel molecules are absorbed in the sample and act as a plasticiser: the stress at yield is slightly reduced and the elongation at yield is approximately doubled. Parts made of DELRIN 511P, after immersion, remain stronger than the copolymer parts are before immersion. 4,0 weight length 75 Effect of immersion on yield point 3,5 DELRIN 511P 3,0 2, Other acetals 2,0 Change of weight or length (%) 1,5 1,0 0,5 0,0 DELRIN 511P other acetals Stress at yield (MPa) Strain at yield (%) Fig. 1 Change of weight (blue bar) and dimension (yellow bar), and change of yield point upon immersion in fuel CM-15, 500 h at 60 C; fuel absorbed in the sample acts as a plasticizer 2

5 Colours Fully compounded custom colours are available for most of the DELRIN products at a minimum order quantity of 1000 kg. All coloured DELRIN resins are free of heavy metals. Compared with masterbatch colouring, fully compounded colours give the best possible overall offering of coloured resin due to careful pigment selection. Accurate metering and uniform pigment dispersion during the production process guarantee consistent colour quality and optimal physical properties of the moulded part, thus avoiding colour variations and part failures which may occur with the use of masterbatches. Mould temperatures of 80 to 100 C are required for adequate and even crystallisation and best long term part performance. In specific cases, even higher mould temperatures may be required. Please contact your local DuPont representative for further and more detailed information. Packaging DELRIN is packaged in strong, environmentally friendly polyethylene 25 kg bags or 1000 kg octatainers. As a consequence of its enhanced stability, DELRIN P has a better colourability and allows for the use of a wider range of pigments. Coloured resins may show slightly different properties compared to natural resins, especially for crystallinity and shrinkage. In some cases, such effects can be minimised by appropriate pigment selection. Processing DELRIN can be processed in standard injection or extrusion processes. Depending on machine design and resin type, blow is also possible. For injection of DELRIN, we recommend high compression screws in order to achieve the best possible melt homogeneity. The key parameters for precision are: melt temperature; injection pressure; hold pressure time; mould temperature. Barrel temperatures should be selected to achieve a melt temperature of 210 to 220 C. The nozzle temperature and the hot runner temperature should be set at maximum 190 C. The additive package of DELRIN P reduces shear sensitivity and allows for fast injection speeds. It is recommended to avoid pressure peaks at the end of the injection phase. Depending on the particular grade and mould design, hold pressures of 70 to 100 MPa (specific) should be selected. To achieve optimal mechanical properties and dimensional stability of the finished parts, hold pressure time should be 8 s per mm wall thickness. This is applicable at thicknesses of approximately 1 to 3 mm. Compositions DELRIN, DELRIN P and DELRIN ELEVEN Series are available in high, medium, low and very low viscosity with 100 being the most viscous and 1700P the most fluid. DELRIN is also available in a range of other compositions offering properties to meet the requirements for many specific end-use applications. 3

6 Standard grades Grade Process Characteristics Typical applications DELRIN 100 Injection High viscosity resin, best combination of stiffness High performance engineering parts, e.g. gears, and toughness seatbelt restraint systems, fasteners DELRIN 100P Injection Same as DELRIN 100, best stability for Same as DELRIN 100 deposit free in demanding processing conditions (e.g. hot runners) DELRIN 111P Injection High viscosity Fuel systems, wheels, gears DELRIN 107 Injection DELRIN 100 with UV protection Ski bindings, seat belt restraint systems DELRIN 127UV Injection DELRIN 100P with maximum UV protection Automotive parts with maximum UV performance requirements DELRIN 311DP Injection Medium viscosity, fast resin Automotive and industrial parts, snap-fits DELRIN 500 Injection Medium viscosity resin. Optimum combination General mechanical parts, automotive fuel of flow and physical properties systems, snap-fits, fasteners, gears DELRIN 500P Injection Same as DELRIN 500, best stability for Same as DELRIN 500 deposit free in demanding processing conditions (e.g. hot runner tools) DELRIN 507 Injection DELRIN 500 with UV protection Automotive and industrial parts DELRIN 511P Injection Medium viscosity, low shrinkage Fuel systems, springs, conveyor belts DELRIN 527UV Injection DELRIN 500P with maximum UV protection Automotive parts with maximum UV performance requirements DELRIN 900P Injection Low viscosity, fast resin Multicavity moulds and parts with thin sections, e.g. consumer electronics parts, zippers DELRIN 911P Injection Low viscosity Aerosol valves, filters, micro components DELRIN 927UV Injection DELRIN 900P with maximum UV protection Loudspeaker grills Extrusion grade (separate data sheet available) Grade Process Characteristics Typical applications DELRIN DE7031 Extrusion High viscosity extrusion resin, best extrusion Extruded rods and slabs for machining, tubes and stability sheets Speciality grades Toughened grades Grade Process Characteristics Typical applications DELRIN 100ST Injection Super tough high viscosity resin, outstanding Fasteners, lock systems resistance against repetitive impact, even at very low temperature DELRIN 100T Injection Toughened high viscosity resin, good friction Fasteners, seat belt restraint systems, gears partner for DELRIN 100/500 in gear applications DELRIN 500T Injection Toughened medium viscosity resin, optimising flow Fasteners, gears properties and impact performance, good friction partner for DELRIN 100/500 in gear applications 4

7 Speciality grades Low friction and wear grades (separate data sheets available) Grade Process Characteristics Typical applications DELRIN 100AL Injection Advanced lubricated 100 grade. General purpose Applications requiring low wear and/or coefficient of low wear/low friction grade. friction against steel, DELRIN or other plastics (low noise) DELRIN 100KM Injection DELRIN 100 grade with KEVLAR Applications requiring high wear resistance in abrasive environment DELRIN 500AF Injection DELRIN 500 with TEFLON fibres, best friction and Speciality friction and wear applications, wear properties conveyor systems DELRIN 500AL Injection Advanced lubricated 500 grade. General purpose Applications requiring low wear and/or coefficient of low wear/low friction grade. friction against steel, DELRIN or other plastics (low noise) DELRIN 500CL Injection Chemically lubricated DELRIN 500 Gears, drive trains, sliding devices DELRIN 500SC Injection Masterbatch DELRIN 500 grade with 20% of silicone fluid. Applications requiring low friction against DELRIN or other plastics. DELRIN 520MP Injection DELRIN 500 grade with 20% TEFLON PTFE micropowder Applications requiring low wear and/or low coefficient of friction against steel, DELRIN or other plastics Delrin 900SP Injection Special polymer lubricated DELRIN 900P Consumer electronics. Applications requiring lw and/or lf against DELRIN and other plastics (low noise) Higher stiffness grades (separate data sheets available) Grade Process Characteristics Typical applications DELRIN 510GR Injection 10% glass-reinforced resin Parts requiring very high strength and stiffness DELRIN 525GR Injection 25% glass-reinforced resin Parts requiring very high strength and stiffness DELRIN 570 NC Injection 20% glass-filled medium viscosity resin General engineering parts DELRIN 577 BK Injection 20% glass-filled medium viscosity resin with UV protection General engineering parts 5

8 Typical properties of DELRIN resins Standard grades High High High Medium Medium Test viscosity viscosity viscosity viscosity viscosity Test method P 500 Property conditions ISO Units UV 111P 311DP 507 Melt flow rate (= MFR) 1133 g/10 min 2,3 2,3 2, MECHANICAL Yield stress 1) 20 C 527-1/2 MPa C C 71/72 2) 71/72 2) 71/72 2) 74 2) 71/73 2) 40 C C C C Yield strain 1) 20 C 527-1/2 % C C 26/23 2) 25/23 2) 22/20 2) 18 2) 17/16 2) 40 C C C C Tensile modulus 3) 20 C 527-1/2 MPa C C C C C C Nominal strain at break 2) 23 C 527-1/2 % Strain at break 2) 23 C 527-1/2 % Charpy notched impact strength 23 C 179/1eA kj/m C (1993) Izod notched impact strength 23 C 180/1A kj/m C (1993) ) Testing speed 5 mm/min 2) Testing speed 50 mm/min 3) Testing speed 1 mm/min All the above information is subject to the disclaimer printed on the back page of this document. 6

9 Standard grades Specialty grades Medium Medium Low Low Low frict. Low frict. Low frict. Low frict. Higher viscosity viscosity viscosity viscosity Toughened Toughened Toughened and wear and wear and wear and wear stiffness 500P 900P 527UV 511P 927UV 911P 100ST 100T 500T 100KM 500AL 500CL 520MP 510GR ,9 2,1 12 2, * 70/72 2) 72/73 2) 71/72 2) 73/74 2) 43/44 2) 53/55 2) 58/59 2) 63/60 2) * ,5** 16/15 2) 13/12 2) 12/11 2) 10/9 2) 29/28 2) 27/27 2) 17/17 2) ) ,5 1) * Stress at break ** Strain at break All the above information is subject to the disclaimer printed on the back page of this document. 7

10 Typical properties of DELRIN resins (continued) Standard grades High High High Medium Medium Test viscosity viscosity viscosity viscosity viscosity Test method P 500 Property conditions ISO Units UV 111P 311DP 507 Melting temperature, by DSC 3146 Method C2 C MISCELLANEOUS ELECTRICAL THERMAL Temperature of deflection under load 1,8 MPa 75 C Temperature of deflection under load 4) 1,8 MPa 75 C Coefficient of linear thermal expansion K 1 1,2 1,2 1,2 1,2 1,2 Vicat softening temperature 10 N 306 A50 C N 306 B Relative permittivity 100 Hz IEC ,8 3,8 3,8 3,8 1 MHz IEC ,6 3,8 3,7 3,7 Dissipation factor 100 Hz IEC MHz IEC Surface resistivity IEC 93 Ω Volume resistivity IEC 93 Ω cm Electric strength, short time IEC 243 MV/m Arc resistance ASTM D 495 s no tracking no tracking no tracking no tracking Flammability UL 94 HB HB HB HB HB Density 1183 g/cm 3 1,42 1,42 1,42 1,42 1,42 Water absorption 62 % 24 hours immersion 0,25 0,32 0,30 0,25 0,25 Equilibrium at 50% RH 0,22 0,28 0,30 0,25 0,22 Equilibrium immersion 0,90 1,40 1,40 0,90 0,90 Rockwell hardness 2039 M92 M92 M92 M92 M92 (R + M) R120 R120 R120 M120 R120 Shrinkage, ISO plate ( mm) parallel ± 0,2% % 2,1 2,1 2,0 2,0 2,1 normal ± 0,2% 1,9 1,9 1,9 1,9 2,0 Chemical resistance All resins have outstanding resistance to neutral chemicals, including a wide variety of solvents 4) Annealed specimen. All the above information is subject to the disclaimer printed on the back page of this document. 8

11 Standard grades Specialty grades Medium Medium Low Low Low frict. Low frict. Low frict. Low frict. Higher viscosity viscosity viscosity viscosity Toughened Toughened Toughened and wear and wear and wear and wear stiffness 500P 900P 527UV 511P 927UV 911P 100ST 100T 500T 100KM 500AL 500CL 520MP 510GR ,2 1,2 1,2 1,2 1,2 1,2 1,2 1,2 1,2 1,2 1,2 1, ,4 3,8 4,7 3,1 3,6 3,5 3,4 3,6 4,5 3, no tracking no tracking no tracking no tracking no tracking HB HB HB HB HB HB HB HB HB HB HB HB 1,42 1,42 1,42 1,42 1,34 1,37 1,39 1,41 1,38 1,42 1,54 1,49 0,32 0,30 0,32 0,30 0,4 0,31 0,27 0,28 0,30 0,28 0,30 0,35 0,24 1,10 1,40 1,40 1,40 1,40 0,9 1,00 M92 M92 M92 M92 M58 M79 M92 R120 R120 R120 R120 R105 R117 R120 2,1 1,9 2,1 1,9 1,3 1,8 1,8 2,0 1,9 1,9 2,0 1,3 2,0 1,8 2,0 1,8 1,4 1,7 1,7 1,5 1,8 1,9 1,5 0,8 All resins have outstanding resistance to neutral chemicals, including a wide variety of solvents These values are for natural colour (NC010) resins only. Colourants or additives of any kind may alter some or all of these properties. All the above information is subject to the disclaimer printed on the back page of this document. 9

12 For further information on Engineering Polymers contact: Internet location: Belgique / België Du Pont de Nemours (Belgium) Antoon Spinoystraat 6 B-2800 Mechelen Tel. (15) Telex Telefax (15) Bulgaria Serviced by Biesterfeld Interowa GmbH & Co. KG. See under Österreich. C eská Republika a Slovenská Republika Du Pont CZ, s.r.o. Pekarska 14/268 CZ Praha 5 Jinonice Tel. (2) Telefax (2) Danmark Du Pont Danmark A / S Skjøtevej 26 P.O. Box 3000 DK-2770 Kastrup Tel Telefax Deutschland Du Pont de Nemours (Deutschland) GmbH DuPont Straße 1 D Bad Homburg Tel. (06172) 87 0 Telex DPD D Telefax (06172) Egypt Du Pont Products S.A. Bldg no. 6, Land #7, Block 1 New Maadi ET-Cairo Tel. (00202) Telefax (00202) España Du Pont Ibérica S.A. Edificio L Illa Avda. Diagonal 561 E Barcelona Tel. (3) Telefax (3) France Du Pont de Nemours (France) S.A. 137, rue de l Université F Paris Cedex 07 Tel Telex dupon Telefax Hellas Ravago Plastics Hellas ABEE 8, Zakythou Str. GR Halandri Tel. (01) Telefax (01) Israël Gadot Chemical Terminals (1985) Ltd. 22, Shalom Aleichem Street IL Tel Aviv Tel. (3) Telex GADOT IL Telefax (3) Italia Du Pont de Nemours Italiana S.r.L. Via Volta, 16 I Cologno Monzese Tel. (02) Telefax (02) Magyarország Serviced by Biesterfeld Interowa GmbH & Co. KG. See under Österreich. Maroc Deborel Maroc S.A. 40, boulevard d Anfa 10 MA-Casablanca Tel. (2) Telefax (2) Norge Distrupol Nordic Niels Leuchsvei 99 N-1343 Eiksmarka Tel Telefax Österreich Biesterfeld Interowa GmbH & Co. KG Bräuhausgasse 3-5 P.O. Box 19 AT-1051 Wien Tel. (01) Fax (01) info@interowa.at internet: Polska Du Pont Poland Sp. z o.o. ul. Powazkowska 44C PL Warsaw Tel Telefax Portugal ACENYL Rua do Campo Alegre, P-4100 Porto Tel. (2) / Telex MACOL Telefax (2) Romania Serviced by Biesterfeld Interowa GmbH & Co. KG. See under Österreich. Russia E.I. du Pont de Nemours & Co. Inc. Representative Office B. Palashevsky Pereulok 13 / 2 SU Moskva Tel. (095) Telex DUMOS SU Telefax (095) Schweiz / Suisse / Svizzera Dolder AG Immengasse 9 Postfach CH-4004 Basel Tel. (061) Telefax (061) Internet: Slovenija Serviced by Biesterfeld Interowa GmbH & Co. KG. See under Österreich. Suomi / Finland Du Pont Suomi Oy Box 62 FIN Espoo Tel. (9) Telefax (9) Sverige Du Pont Sverige AB Box 23 SE Kista (Stockholm) Tel. (8) Telefax (8) Türkiye Du Pont Products S.A. Turkish Branch Office Sakir Kesebir cad. Plaza 4 No 36 / 7, Balmumcu TR Istanbul Tel. (212) Telex DPIS TR Telefax (212) Ukraine Du Pont de Nemours International S.A. Representative Office 3, Glazunova Street Kyiv Tel. (044) / Telefax (044) United Kingdom Du Pont (U.K.) Limited Maylands Avenue GB-Hemel Hempstead Herts. HP2 7DP Tel. (01442) Telefax (01442) Argentina Du Pont Argentina S.A. Avda. Mitre y Calle 5 (1884) Berazategui-Bs.As. Tel Telefax Brasil Du Pont do Brasil S.A. Al. Itapecuru, 506 Alphaville Barueri-São Paulo Tel. (5511) Asia Pacific Du Pont Kabushiki Kaisha Arco Tower 8-1, Shimomeguro 1-chome Meguro-ku, Tokyo Tel. (03) Telefax (03) South Africa Plastamid (Pty) Ltd. 43 Coleman Street P.O. Box 59 Elsies River 7480 Cape Town Tel. (21) Telefax (21) USA DuPont Engineering Polymers Barley Mill Plaza, Building #22 P.O. Box Wilmington, Delaware Tel. (302) Telefax (302) Requests for further information from countries not listed above should be sent to: Du Pont de Nemours International S.A. 2, chemin du Pavillon CH-1218 Le Grand-Saconnex/ Geneva Tel. (022) Telex DUP CH Telefax (022) The information provided in this documentation corresponds to our knowledge on the subject at the date of its publication. This information may be subject to revision as new knowledge and experience becomes available. The data provided fall within the normal range of product properties and relate only to the specific material designated; these data may not be valid for such material used in combination with any other materials or additives or in any process, unless expressly indicated otherwise. The data provided should not be used to establish specification limits nor used alone as the basis of design; they are not intended to substitute for any testing you may need to conduct to determine for yourself the suitability of a specific material for your particular purposes. Since DuPont cannot anticipate all variations in actual end-use conditions DuPont makes no warranties and assumes no liability in connection with any use of this information. Nothing in this publication is to be considered as a license to operate under or a recommendation to infringe any patent rights. Caution: Do not use this product in medical applications involving permanent implantation in the human body. For other medical applications see DuPont Medical Caution Statement. Delrin ONLY BY DUPONT H Registered trademarks of E.I. du Pont de Nemours and Company Printed in Switzerland The miracles of science is a trademark of E.I. du Pont de Nemours and Company