company tower banner
Evonik Company Logo

VESTAKEEP® L 4000 G

1 of 11 products in this brand
VESTAKEEP® L 4000 G is a high-viscosity, unreinforced, lubricated polyether ether ketone suitable for injection molding and extrusion. The semicrystalline polymer offers superior thermal and chemical resistance. Parts made from VESTAKEEP® L 4000 G have low flammability and can be processed using standard machines for thermoplastics.

Polymer Name: Polyetheretherketone (PEEK)

Processing Methods: Extrusion, Film Extrusion, Injection Molding, Isostatic Molding, Profile Extrusion

Additives Included: Lubricant (Unspecified)

Flexural Modulus: 3445.0 - 3445.0 MPa

Materials Features: Abrasion Resistant, Acid Resistant, Alkali Resistant, Chemical Resistant, Cost Effective, Crack Resistant, Creep Resistant, Dimensional Stability, Ductile, Easier Processing, Electrically Insulating, Food Contact Acceptable, Gasoline Resistant, Good Compressive Strength, Good Mechanical Properties, Good Thermal Stability, High Dielectric Strength, High Pressure Applications, High Stiffness, High Strength, High Temperature Application, High Viscosity, Hydraulic Fluid Resistant, Hydrocarbon Resistant, Light Weight, Low Flammability, Lubricated, Oil Resistant, Salt Water/Spray Resistant, Seawater Resistant, Semi Crystalline, Service Life Extension, Solvent Resistant, Unreinforced, Water Resistant, Wear Resistant

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Additives Included
Plastics & Elastomers Functions
Technologies

Features & Benefits

Product Highlights

VESTAKEEP® L4000 G are suitable for convoluted and corrugated tubes. The high temperature resistant PEEK is inherently flame retardant, has a high LOI, a low smoke density, and releases no toxic gasses in case of fire.

Applications & Uses

Processing
  • VESTAKEEP® L 4000 G can be processed by common machines for thermoplastics.
  • The additional lubrication agent improves the feeding process.
  • We recommend a melt temperature between 370°C and 380°C during the injection molding process. The mold temperature should be within a range of 160°C to 200°C, preferably 180°C.

Properties

Flame Rating
Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Modulus522000psiISO 527
Tensile Strength13900psiISO 527
Yield Stress13600psiISO 527
Yield Strain5%ISO 527
Nominal Strain at Break (ɛtb)30%ISO 527
Charpy Notched Impact Strength (+23°C)3.33ftlb/in²ISO 179/1eA
Charpy Notched Impact Strength (-30°C)2.85ftlb/in²ISO 179/1eA
Flexural Modulus (23°C)500000psiISO 178
Flexural Stress at Conv. Deflection (23°C)16500psiISO 178
Flexural Strength (23°C)21500psiISO 178
Flexural Strain at Flexural Strength (23°C)7%ISO 178
Physical Properties
ValueUnitsTest Method / Conditions
Density1.3g/cm³ISO 1183
Water Absorption0.5%Sim. to ISO 62
Humidity Absorption0.3%Sim. to ISO 62
Shore D Hardness (1s, Annealed)87ASTM D 2240
Thermal Properties
ValueUnitsTest Method / Conditions
Melting Temperature644°FISO 11357-1/-3
Temperature of Deflection Under Load A (1.80 Mpa)311°FISO 75-1/-2
Temperature of Deflection Under Load B (0.45 Mpa)401°FISO 75-1/-2
Vicat Softening Temperature A (10 N, 50 K/h)635°FISO 306
Vicat Softening Temperature B (50 N, 50 K/h)581°FISO 306
Coefficient of Linear Thermal Expansion (23°C to 55 °C, Parallel)3.33e-05in/in/°FISO 11359-1/-2
Electrical Properties
ValueUnitsTest Method / Conditions
Volume Resistivity (pV)min. 1E13Ohm*mIEC 62631-3-1
Surface Resistivity (σE)1000000000000000OhmIEC 62631-3-2
Relative Permittivity (100Hz)2.8IEC 62631-2-1
Relative Permittivity (1MHz)2.8IEC 62631-2-1
Dissipation Factor (1Mhz)50E-4IEC 62631-2-1
Comparative Tracking Index (Test Solution A, 50 Drops Value)200IEC 60112
Performance Level Categories3ASTM D 3638
Rheological Calculation Properties
ValueUnitsTest Method / Conditions
Thermal Conductivity of Melt1.25BTU in/(hr ft² °F)
Specific Heat Capacity Melt 0.793BTU/(Ib-F)
Minimum Mold Temperature320°F
Maximum Mold Temperature392°F
Minimum Melt Temperature680°F
Maximum Melt Temperature716°F
Test Specimen Production
ValueUnitsTest Method / Conditions
Injection Molding - Melt Temperature716°FISO 294
Injection Molding - Mold Temperature356°FISO 294
Injection Molding - Injection Velocity7.87in/sISO 294
Injection Molding - Pressure at Hold17400psiISO 294
Rheological Properties
ValueUnitsTest Method / Conditions
Melt Volume Flow Rate (at 716°F, 11lb)12cm³/10minISO 1133
Molding Shrinkage (Parallel)0.9%ISO 294-4, 2577
Molding Shrinkage (Normal)1.1%ISO 294-4, 2577
Burn Testing Properties
ValueUnitsTest Method / Conditions
Burning Behavior (at 1.5 mm Nominal Thickness)V-0classIEC 60695-11-10
Burning Behavior (at Thickness 0.1260 in.)V-0classIEC 60695-11-10
Oxygen Index38%ISO 4589-1/-2
Limiting Oxygen Index38%ASTM D 2863
Hot Wire Ignition (at Thickness 0.1260 in.)1PLCIEC 60695-2-20

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Stress - Strain

Secant Modulus - Strain

Packaging & Availability

Packaging Type
Packaging Information

VESTAKEEP® L 4000 G is supplied as granules in 25 kg boxes with moisture-proof polyethylene liners.

Storage & Handling

Shelf Life
2 years
Storage Conditions

Inside the original and undamaged packaging, the product has a shelf life of at least 2 years when stored in dry rooms at temperatures not exceeding 30°C.