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Liquid Crystal Polymer (LCP)ThermoplasticTrade Names• Granlar• HX Series• Vectra• XydarManufacturerGranmont Inc.E.I. DuPontHoescht CelaneseAmoco Performance ProductsGeneral DescriptionLiquid crystal polymers (LCP), properly called wholly aromaticcopolyesters, can be based on terephthalic acid, p,p-dihydroxybiphenyl,and p-hydroxybenzoic acid. The compounds react to form tightlypacked, rigid polymer chains consisting of long, flat monomeric units.LCP’s resistance to weathering, radiation, burning, and almost allchemicals, as well as its outstanding strength at extreme temperatures,makes it a suitable replacement for most other engineering materials,including metals and ceramics. Specialty grades available include glass,carbon, and mineral filled, as well as wear resistant, colored, andalloyed. In 2004, the price of LCP ranged approximately from $8.00 to$12.00 per pound at truckload quantities.General PropertiesLCP has outstanding mechanical properties at both ambient andextreme temperatures. For example, LCP can have a tensile modulusas high as 1.20x10 6 psi (8.4x10 4 kg/cm 2 ) at 575°F (308°C), whichexceeds that of most other engineering thermoplastics at roomtemperature. Grades of LCP have tensile strengths in excess of20,000 psi (1400 kg/cm 2 ), a compressive strength of more than 6,000psi (422 kg/cm 2 ), and its mechanical properties improve at subzerotemperatures. LCP is resistant to virtually all chemicals, includingacids, organic hydrocarbons, and boiling water. It is attacked byconcentrated, boiling caustics but is unaffected by milder solutions.LCP is also unaffected by ionizing and Cobalt 60 radiation up to 10billion rads, it withstands high levels of UV radiation, and istransparent to microwaves. It is an electrical insulator with good arcresistance, is UL rated for continuous electrical service at 464°F(240°C), and can be used for applications with intermittenttemperatures up to 600°F (316°C). LCP is inherently flame resistant,rated UL94 V-0, and will not sustain combustion. It has remarkablethermal oxidative stability with a decomposition temperature ofgreater than 1000°F (550°C) in air.Typical Properties of Liquid Crystal Polymer (LCP)American EngineeringProcessing Temperature 500°F to 700°F 260°C to 371°CLinear Mold Shrinkage 0.001 to 0.002 in./in. 0.001 to 0.002 cm/cmMelting Point 530°F to 670°F 277°C to 354°CDensity 93.0 to 111.7 lb./ft. 3 1.49 to 1.79 g/cm 3Tensile Strength, Yield 21.5 to 30.0 lb./in. 2 x 10 3 15.1 to 21.1 kg/cm 2 x 10 2Tensile Strength, Break 9.0 to 30.0 lb./in. 2 x 10 3 6.3 to 21.1 kg/cm 2 x 10 2Elongation, Break 1.0 to 3.0% 1.0 to 3.0%Tensile Modulus 14.6 to 32.0 lb./in. 2 x 10 5 10.3 to 22.5 kg/cm 2 x 10 4Flexural Strength, Yield 13.7 to 27.0 lb./in. 2 x 10 3 9.6 to 26.0 kg/cm 2 x 10 2Flexural Modulus 13.9 to 23.2 lb./in. 2 x 10 5 9.8 to 16.3 kg/cm 2 x 10 4Compressive Strength 6.5 to 11.6 lb./in. 2 x 10 3 4.6 to 8.2 kg/cm 2 x 10 2Izod Notched, R.T. 0.7 to 3.1 ft.-lb./in. 3.8 to 16.7 kg cm/cmHardness R95 - R110 Rockwell R95 - R110 RockwellThermal Conductivity 0.9 to 3.1 BTU-in./hr.-ft. 2 -°F 0.13 to 0.45 W/m-°KLinear ThermalExpansionDeflection Temperature@ 264 psiDeflection Temperature@ 66 psiContinuousService Temperature0.1 to 1.5 in./in.-°F x 10 -5 0.2 to 2.7 cm/cm-°C x10 -5350°F to 660°F 170°C to 349°CTypical Applications• Electrical – Stator insulation, rotors, boards for motors,burn-in sockets, interface connectors• Heavy Industry – Chemical process and oil field equipmentSI– –– –Dielectric Strength 550 to 900 V/10 -3 in 2.2 to 3.5 V/mm x 10 4Dielectric Constant@ 1 MHzDissipation Factor@ 1 MHzWater Absorption,24 hr.3.1 to 4.3 3.1 to 4.30.020 to 0.030 0.020 to 0.0300.01 to 0.10% 0.01 to 0.10%32The Loctite ® Design Guide for Bonding Plastics, Volume 4
ADHESIVE SHEAR STRENGTH(psi)(MPa)Liquid Crystal Polymer (LCP)G-54040% Glass Reinforced58 rmsG-540 ROUGHENED63 rmsG-593030% Glass Reinforced106 rmsG-930 ROUGHENED113 rmsXydar courtesy of Amoco Performance ProductsLoctite ® 380 Black Max ® Instant Adhesive,Rubber ToughenedLoctite ® 401 Prism ® Instant Adhesive,Surface InsensitiveMEDICAL: Loctite ® 4011 Prism ®Instant Adhesive, Surface InsensitiveLoctite ® 401 Prism ®Loctite ® 770 Prism ® PrimerMEDICAL: Loctite ® 4011 Prism ® /Loctite ® 7701 Prism ® PrimerLoctite ® 414 Super Bonder ®Instant Adhesive, General PurposeLoctite ® 330 Depend ® Adhesive,Two-Part No-Mix AcrylicLoctite ® 3105 Light Cure Adhesive,MEDICAL: Loctite ® 3311 Light Cure Adhesive5003.53002.14002.83502.44503.16504.510507.211007.610507.211007.611507.96504.53502.43002.15003.53502.45003.55003.512008.3145010.0155010.712508.69006.25003.5Loctite ® 3340 Light Cure Adhesive,UV Cationic EpoxyLoctite ® 4305 Flashcure ® Light Cure AdhesiveFLUORESCENT: Loctite ® 4307 Flashcure ®Light Cure AdhesiveLoctite ® H3000 Speedbonder Structural Adhesive, General PurposeLoctite ® H4500 Speedbonder Structural Adhesive, Metal BonderLoctite ® 3030 Adhesive, Polyolefin BonderLoctite ® E-00CL Hysol ® Epoxy Adhesive,Low Odor1501.07505.25003.55503.84503.16004.1Adhesive PerformanceLoctite ® E-30CL , E-20HP and E-214HP Hysol ® Epoxy Adhesives and Loctite ® Fixmaster ® HighPerformance Epoxy all achieved good bond strength on the unfilled LCP resin. All other adhesivesachieved moderate to poor bond strengths on LCP.Surface TreatmentsSurface roughening caused a large, statistically significant increase in the bond strengths achieved onLCP for all the adhesives evaluated, except Loctite ® 3105 and 3311 Light Cure Adhesives, for whichsurface roughening had no statistically significant effect. Although the process of surface roughening didnot result in a significant increase in the surface roughness of the LCP, it removed a surface layer, whichVectra L140D-2 produced by Ticona 111 rmsLoctite ® E-90FL Hysol ® Epoxy Adhesive,FlexibleLoctite ® E-30CL Hysol ® Epoxy Adhesive,Glass BonderMEDICAL: Loctite ® M-31CL Hysol ®Epoxy Adhesive, Glass BonderLoctite ® E-20HP Hysol ® Epoxy Adhesive,Fast SettingMEDICAL: Loctite ® M-21HP Hysol ®Epoxy Adhesive, Fast SettingLoctite ® E-214HP Hysol ® Epoxy Adhesive,High StrengthLoctite ® Fixmaster ® High Performance EpoxyLoctite ® 1942 Hysol ® Hot Melt Adhesive,EVA Based5503.810006.99006.2210014.510507.21000.7resulted in higher bond strengths. The use of Loctite ® 770 Prism ® Primer, in conjunction with Loctite ®401 Prism ® Instant Adhesive, or Loctite ® 4011 Prism ® Medical Device Instant Adhesive with Loctite ®7701 Prism ® Primer, resulted in no statistically significant change in the bondability of LCP.Other Important Information• LCP is compatible with all Loctite ® brand adhesives, sealants, primers, and activators.• Surface cleaners: isopropyl alcohol, Loctite ® ODC-Free Cleaner & Degreaser.Loctite ® 3651 Hysol ® Hot Melt Adhesive,Polyolefin1501.0Loctite ® 7804 Hysol ® Hot Melt Adhesive1000.7Loctite ® 3631 Hysol ® Hot Melt Adhesive,Urethane3502.4Loctite ® U-05FL Hysol ® Urethane Adhesive,High StrengthLoctite ® Fixmaster ® Rapid Rubber RepairOEM: Loctite ® U-04FL Hysol ®Urethane Adhesive, Fast SettingLoctite ® 5900 ® Flange Sealant,Heavy Body RTV Silicone7505.24503.11501.0NOTES:The addition of the indicated additive (or surface roughening) caused a statistically significant increasein the bond strength within 95% confidence limits.The Loctite ® Design Guide for Bonding Plastics, Volume 4 33
Page 5 and 6: How To Use The Plastic Bonding Guid
Page 8: Cyanoacrylate AdhesivesGeneral Desc
Page 11 and 12: Light Curing Acrylic AdhesivesGener
Page 13 and 14: Silicone AdhesivesGeneral Descripti
Page 15 and 16: Why Bond Plastics With Loctite ® B
Page 17 and 18: ADHESIVE SHEAR STRENGTH(psi)(MPa)Ac
Page 25 and 26: ADHESIVE SHEAR STRENGTH(psi)(MPa)Di
Page 27 and 28: ADHESIVE SHEAR STRENGTH(psi)(MPa)Ce
Page 29 and 30: ADHESIVE SHEAR STRENGTH(psi)(MPa)Ep
Page 31 and 32: ADHESIVE SHEAR STRENGTH(psi)(MPa)Po
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Page 53 and 54: ADHESIVE SHEAR STRENGTH(psi)(MPa)Lo
Page 73 and 74: ADHESIVE SHEAR STRENGTH(psi)(MPa)St
Page 75 and 76: ADHESIVE SHEAR STRENGTH(psi)(MPa)Vi
Page 77 and 78: Surface TreatmentsAdhesive Abrading
Page 79 and 80: Adhesive Joint DesignIntroductionIn
Page 81 and 82: TitleDesign GuidelinesEngineers mus
Page 83 and 84: Shortening bond overlaps reduces bo
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Softening and weakening of the surf
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Determining The Test MethodThe lap
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Block Shear Test Method1. Assemblie
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ViscosityViscosity is a product pro
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Index of Trade NamesTrade Name Plas
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Trade Name Plastic Type Manufacture
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AcknowledgmentsThis manual would no
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For more information, please call 1
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