Hostaform SlideX. New POM Product Range for Demanding Tribological Applications PRODUCT INFORMATION. CE Hostaform SlideX english_

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1 Hostaform SlideX New POM Product Range for Demanding Tribological Applications PRODUCT INFORMATION CE Hostaform SlideX english_ indd :07

2 ProductInformation Hostaform SlideX for Demanding Tribological Applications Engineered materials from Celanese have been proven for years in moving technical systems as an alternative to metals. With proper selection of materials, the entire component can be made of a plastic type, without having to subsequently install additional bearings. The use of materials in moving systems requires precise knowledge of the tribological behavior (friction and wear of interacting surfaces in relative motion). Specifically, the friction needed in these systems optimization, since due to the low thermal conductivity of plastics an effective dissipation of frictional heat generated is not always given. This frictional heat leads to a heating of the friction partner, thus especially could reduce the mechanical properties of the resin. This in turn can lead to increased wear of the entire tribological system. Materials for tribological components are often characterized by the coefficient of friction and wear characteristics. Both numbers are no material parameters, but sizes of each tribological system. Hostaform POM has proven its good suitability for tribological applications. In general, the addition of tribological additives changes the mechanical properties. The tribological modification of plastics is usually achieved with solid lubricants (f.e. PTFE or UHMW-PE), waxes, silicone oils, graphite, Molybdendisulfide, special chalks or others. These modifiers reveal their advantages often only under specific tribological conditions, so that their wider applicability could be limited. Celanese offers with the new Hostaform SlideX -series tribological modified POM Copolymer grades which can be used under demanding tribological conditions. The unique advantage of the new Hostaform SlideX is his novel tribological modifier, which is characterized by low friction coefficients and wear rates and which even outperforms PTFE-modified materials. Compared to unmodified standard POM copolymers, the mechanical properties remain, almost unchanged. Customary form covering largely does not occur in Hostaform SlideX. Hostaform SlideX is FDA-compliant and can be used for applications with food and drinking water contact. Hostaform Slidex is available in XAP² quality and complies with the stringent requirements on emissions in automotive interiors. 2

3 Hostaform SlideX Product Portfolio Hostaform SlideX 0313 XAP 2 Very good flowability, extremly low slip and wear coefficient Hostaform SlideX 0304 XAP 2 Extremly high flowability, low slip and wear coefficient Application Areas Bearing systems Conveyer systems Hostaform SlideX Advantages at a Glance Consistant low static coefficient of friction Low wear Food contact approved XAP² quality No customary form covering Eliminates noise No running in No further lubrication needed Guides Sliding systems for Appliances Automotive (seats, sun roofs, gearshifts, HVAC, mirror systems) Sports (ski binding, fishing,...) Roller Shutter Fluid Handling Stearing Systems (Gearboxes) 3

4 ProductInformation Consistent Mechanical Properties Most tribological modifiers influence the mechanics of the base polymer used in each case often significantly. In addition to the stiffness and strength, especially the strength and elongation is greatly reduced. The tribological modification of Hostaform SlideX TM leaves the mechanical properties of the base polymer virtually untouched. The stress-strain curves show the comparison to unmodified Hostaform C9021. Stiffness and strength remain almost constant. The elongation at break is even slightly increased. Comparable to unmodified Hostaform POM Outstanding Performance Since tribological properties are always based on the system, a material characterization can not be performed with a universal testing machine. Rather, the testing methods (test setups) for the material pre-selection must be as close as possible based on the real system. Celanese offers several test setups for their customers. Suitable for High Surface Pressure and Low Sliding Speed The static and dynamic friction of the sliding pair, as well as the wear of the material to be tested can be measured. The difference between dynamic and static coefficient of friction is an indicator for the occurrence of the so-called stick-slip and thus the noise while the slippage. Stress [MPa] Hostaform C Hostaform SlideX TM 0313 XAP Strain [%] Test setting for tribological data at high surface pressure F N = 5-30 N v r = 1-10 mm/s A = Surface Area a = Acceleration F R = Friction Force F H = Static Friction Force F N The comparison of mechanical and rheological properties of Hostaform SlideX TM 0313 XAP 2 and typical solidmodified POM grades shows the superiority in mechanical properties to PTFE-modified POM. This opens up material savings (f.e. wall thickness reductions) or increased component performance while maintaining component geometry. Excellent mechanical Properties Charpy- Notched Impact Toughness 0-10 kj/m 2 Density g/cm 3 MVR 0-16 cm 3 /10 min A a, F R, F H PTFE-modified materials have proven especially at low sliding speeds and high surface pressures and are characterized here by lowest friction coefficient and wear rates. Hostaform SlideX TM 0313 is better than PTFE filled materials (Fig. 1), even under these conditions.the usual, occurring in PTFE-modified products form covering problem does not occur with Hostaform SlideX TM. v r Strain at Break 0-50 % Yield Stress 0-60 MPa Tensile Modulus MPa Plastic plastic pairings have always represented a major challenge to the tribological performance of materials. Hostaform Slidex TM 0313 XAP 2 also shows his extraordinary tribological performance. SlideX TM 0313 XAP 2 POM Homopolymer + 20% PTFE POM + 10% UHMW-PE 4

5 Hostaform SlideX Fig. 1: Best-in-class solution at slow sliding speed Fig. 3: Meets noise free application requirements at T 60 C Ball of steel (R z = 5 µm) F: 30 N v: 8 mm/s t: 45 min C 9021 AW LW90EWX C 9021 G C LW90BSX 1.00 C % Silicone Oil SlideX TM 0313 XAP 2 C 9021TF C 9021TF No Noise Risk Low Noise Risk High Noise Risk C 9021 TF 1.0 X369 SlideX TM 0313 XAP 2 vs. SlideX TM 0313 XAP Ball of Hostaform C 9021 F: 30 N v: 8 mm/s C 9021 SW S 9243 C % Silicone Oil T: 60 C t: 45 min C 9021 No Noise Risk Low Noise Risk < 0 db 0.0 High Noise Risk > 0 db Lowest friction coefficient reduce the heat input to the sliding system and can lead to a potential increase in service. As in Figure 2 can be seen at the same time very low wear rates are measured. POM-POM pairings with Hostaform SlideX TM 0313 XAP 2 are not tend to noise and are therefore very well feasible. Due to its extremely low friction levels Hostaform SlideX TM is also suitable for dry running material for applications that normally require the addition of an external lubricant, such as lubricating oil. However, such lubricants increase the risk of chemically caused material degradation. Fig. 2: Outperforms PTFE and silicone oil based grades Fig 4: Potential Material to be used without external lubricants Ball of Hostaform C 9021 F: 30 N v: 8 mm/s t: 45 min No Noise Risk Low Noise Risk < 0 db High Noise Risk > 0 db C 9021 vs. C 9021 SW C 9021 vs. C 9021 TF C 9021 vs. C 9021 C 9021 vs. C 9021 AW C 9021 vs. C Silicone Oil C 9021 vs. SlideX TM 0313 XAP Ball of Hostaform C 9021 F: 30 N v: 8 mm/s NO EXTERNAL LUBRICATION! t: 45 min External Lubrication EXTERNAL LUBRICATION! No Noise Risk Low Noise Risk High Noise Risk Silicone Oil AK30000 Klüberoil 4UH 1-32N SlideX TM 0313 XAP Klüberalpha YM Unisilikon TK 017/ Elevated temperatures often lead to a degradation of the friction and wear behavior. Accompanying this a significant increase in noise exposure is recorded. Again Hostaform SlideX TM 0313 offers a solution. The sliding pair Hostaform SlideX against Hostaform SlideX TM runs even at elevated temperatures, noise-free (Fig.3). Fig.4 shows the friction and wear behavior of Hostaform SlideX TM in dry running operations against Hostaform C9021 compared to pairings Hostaform C Hostaform C9021 with an additionally applied lubricant. The wear behavior of Hostaform SlideX TM is comparable to the externally lubricated systems. At the same time much lower friction coefficients could be measured. 5

6 ProductInformation Suitable For Low Surface Pressure and High Sliding Speed High sliding velocities have a great influence on the heating behavior of tribological systems due to induced frictional energy. Even at relatively low pressure and high sliding speed, the new Hostaform SlideX TM is characterized by extremely low coefficient of friction and wear rates. Test setting for tribological data ar high sliding speed MCR301-test F N Self-positioning 3 Plates fixture (movable in y-, y-and z-direction) Torque Shaft Ball Fixture Ball Plate Multitester running in forces stribeck curve for lubricated plastics p v-limits pressure resistance Parameters F N: 5-50 N v: mm/s T: C t: max. 3 h Movements permanent oscilliating Output depth of wear (online) dynam. coefficient of friction (online) noises Specimen polished steel ball (R z = 0.1 µm) rough steel ball (R z = 1 µm) injection molded plastic balls/plaques The following results show no measurable noise. Thermal and mechanical effects on the test, such as fusing or adhesive or abrasive removal of material, are not detectable. Thus Hostaform SlideX TM is used under a particularly wide range of tribological systems. No melting effects in high sliding speed applications, e.g. conveying systems Ball of Hostaform C 9021 F: 5 N v: 500 mm/s t: 10 min SlideX TM 0313 XAP 2 C % Silicone Oil No melting effects in high sliding speed applications against UHMW-PE Ball of UHMW-PE (R z = 0.7 µm) F: 5 N v: 1000 mm/s t: 3 min C 9021 TF C 9021 No Noise Interrupted Noise Permanent Noise No Noise Interrupted Noise Permanent Noise LW90 EWX HF C 9021 TF HF C 9021 SlideX TM 0313 XAP

7 Hostaform SlideX Properties Below the mechanical properties of Hostaform SlideX TM 0313 and 0304 are shown in comparison to various competing products, such as PTFE-modified POM homo-and copolymers at one glance. Property Test method Unit Hostaform Hostaform Hostaform Hostaform Hostaform POM-Homo + POM Copo + POM Copo + C 9021 SlideX 0313 SlideX 0304 C9021 TF C9021G 20% PTFE 20% PTFE 18% PTFE +2 %Si Density ISO 1183 g/cm 3 1,41 1,4 1,4 1,52 1,34 1,54 1,52 1,49 Melt Volume Rate (MVR) 190/2,16 ISO 1183 cm 3 /10min ,5 13 Tensile Strength ISO 527 MPa Strain at yield ISO 527 % Stress at yield ISO 527 % E-Modulus ISO 527 MPa Notched Charpy 23 C 6,5 5,8 5,8 4 3,5 4-3,5 ISO 1791 eu kj/m 2-30 C ,8 - Flexural Modulus ISO 178 MPa Heat deflection temperture HDT/A ISO 75 C Processing The recommended processing conditions for Hostaform SlideX TM can be found in the following sketches and tables. Hostaform SlideX TM is ideally suited for the injection molding of various components. If the conditions in specific components sometimes not directly lead to an optimal result, the processing conditions can be adjusted. Please do not hesitate to contact Celanese Technical Information Service for further processing adjustments. M1 Manifold M2 Mold M2 Melt D Nozzle n 1 P Sp P St P N Processing temperatures in C M1 M2 M D Max. residence time in the barrel 20 min at M = 210 C Injection time [s] wall thickness s [mm] Injection pressure p Sp = MPa (typical range: MPa) Back pressure time [s] 2-3 wall thickness s 2 [mm] Holding pressure p N = MPa (typical range: MPa) Residual cooling time [s] 2-3 wall thickness s 2 [mm] Back pressure p St = 4-8 MPa Nossle Open or shutt off nozzle, preferable open Screw speed n s = v s / d v s (peripheral velocity of screw) m/s Predying In case of disadvantageous storage conditions: Tr = C, 3-4 h 7

8 ENGINEERED MATERIALS celanese.com/engineered-materials Engineered Materials Celanex thermoplastic polyester (PBT) Hostaform and Celcon acetal copolymer (POM) Celstran, Compel and Factor long fiber reinfoced thermoplastic (LFT) Celstran continuous fiber reinforced thermoplastic (CFR-TP) Fortron polyphenylene sulfide (PPS) GUR ultra-high molecular weight polyethylene (UHMW-PE) Impet thermoplastic polyester (PET) Riteflex thermoplastic polyester elastomer (TPC-ET) Thermx polycyclohexylene-dimethylene terephthalate (PCT) Vandar thermoplastic polyester alloy (PBT) Vectra and Zenite liquid crystal polymer (LCP) Contact Information Europe Am Unisys-Park 1, Sulzbach, Germany Product Information Service t: +(00) t: +49-(0) e: Americas 8040 Dixie Highway, Florence, KY USA Product Information Service t: t: Customer Service t: t: e: Asia 4560 Jinke Road, Zhang Jiang Hi Tech Park Shanghai PRC Customer Service t: f: e: 2014 Celanese or its affiliates. All rights reserved. This publication was printed based on Celanese s present state of knowledge, and Celanese undertakes no obligation to update it. Because conditions of product use are outside Celanese s control, Celanese makes no warranties, express or implied, and assumes no liability in connection with any use of this information. Nothing herein is intended as a license to operate under or a recommendation to infringe any patents. Celanese, registered C-ball design and all other trademarks herein with, TM, SM, unless otherwise noted, are trademarks of Celanese or its affiliates.