描述
VESTAMID L1940 BK 9.7504 is a medium-viscosity, heat-stabilized polyamide 12 compound from Evonik Operations GmbH. The grade is designed for both injection molding and extrusion applications, with particular suitability for wire insulation, cable sheathing and fiber-optic cable components.
The medium-viscosity profile gives VESTAMID L1940 BK 9.7504 a broader processing window than highly flowable thin-coating grades. It provides enough melt strength for extrusion while remaining suitable for injection molding of technical components.
A major advantage of the PA12 base is its low moisture absorption. Compared with many conventional polyamides, PA12 changes relatively little when ambient humidity varies. This helps components made from VESTAMID L1940 BK 9.7504 retain more stable dimensions and mechanical performance in service.
The material is also characterized by high impact strength, a low coefficient of friction and good chemical resistance. These characteristics are valuable in cable, electrical and mechanical applications where the material may be exposed to bending, installation friction, oils, fuels or industrial chemicals.
For cable applications, Evonik recommends VESTAMID L1940 as a mechanical protection material for loose-tube fiber-optic cables. The manufacturer highlights high extrusion line speeds, stable extrusion behavior, fast crystallization, chemical resistance to filling compounds and good hydrolysis resistance as important benefits of VESTAMID in this application.
VESTAMID L1940 BK 9.7504 is supplied in black pellet form and is electrically insulating. The current product information also identifies automotive and mobility, electrical/electronic, industrial and engineering sectors as relevant application areas.
Explore more grades in our PA12 Polyamide 12 Product Category →.
For manufacturer information about cable applications, visit the Official Evonik VESTAMID Cable Sheathing Guide →.
Key Features of VESTAMID L1940 BK 9.7504
| Feature | Benefit |
|---|---|
| Medium Viscosity | Balanced melt strength for extrusion and injection molding |
| Heat Stabilized | Supports stable performance in demanding engineering applications |
| High Impact Strength | Provides toughness for cable and molded components |
| Low Coefficient of Friction | Helps reduce sliding resistance during installation and mechanical contact |
| Low Moisture Absorption | Helps maintain dimensions under changing humidity |
| Good Chemical Resistance | Useful in contact with oils, fuels, greases and many industrial chemicals |
| Electrical Insulation | Suitable for wire, cable and electrical applications |
| High Elongation | Provides ductility and flexibility for cable-related uses |
| Black Color | Supplied as a ready-colored black grade |
| Injection Molding Capability | Suitable for technical molded parts |
| Cable Extrusion Capability | Suitable for wire insulation and cable sheathing |
| Fiber-Optic Cable Use | Recommended for mechanical protection in loose-tube cable systems |
The combination of medium viscosity, toughness and chemical resistance makes VESTAMID L1940 BK 9.7504 especially versatile compared with PA12 grades developed only for high-flow molding or only for thin-layer extrusion.
Typical Applications for VESTAMID L1940 BK 9.7504
VESTAMID L1940 BK 9.7504 is suitable for both extrusion and injection-molding applications.
| Application Area | Typical Use |
|---|---|
| Wire Insulation | Extruded insulation for electrical conductors |
| Cable Sheathing | Protective cable jackets requiring toughness and chemical resistance |
| Fiber-Optic Cables | Mechanical protection for loose-tube fiber bundles |
| Electrical & Electronics | Insulating technical parts and cable components |
| Injection-Molded Components | Tough PA12 technical parts |
| Automotive Components | Molded or extruded parts exposed to oils, fuels and changing humidity |
| Industrial Engineering | Components requiring impact strength and chemical resistance |
| Tribological Components | Parts benefiting from low sliding friction |
For loose-tube fiber-optic cable designs, Evonik lists VESTAMID L1940 among its recommended materials for mechanical protection. Benefits include stable high-speed extrusion, fast crystallization and resistance to cable filling compounds.
Typical Properties of VESTAMID L1940 BK 9.7504
Processing & Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Molding Shrinkage – Parallel | 1.2% | ISO 294-4 / 2577 |
| Molding Shrinkage – Normal | 1.3% | ISO 294-4 / 2577 |
| Test Melt Temperature | 240°C | — |
| Test Mold Temperature | 80°C | — |
| Product Form | Pellets / Granules | — |
| Color | Black | — |
The relatively similar shrinkage values in the two principal directions support predictable molded-part dimensions for an unfilled PA12 resin.
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile Modulus | 1,550 MPa | ISO 527 |
| Tensile Strength | 46 MPa | ISO 527 |
| Yield Stress | 46 MPa | ISO 527 |
| Yield Strain | 7% | ISO 527 |
| Stress at 50% Strain | 35 MPa | ISO 527 |
| Stress at Break | 53 MPa | ISO 527 |
| Nominal Strain at Break | 245% | ISO 527 |
| Charpy Notched Impact, 23°C | 4 kJ/m² | ISO 179/1eA |
| Flexural Modulus, 23°C | 1,440 MPa | ISO 178 |
The high elongation at break is especially relevant to cable and flexible technical applications because VESTAMID L1940 BK 9.7504 can deform significantly before failure.
Thermal & Flammability Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Melting Temperature | 177°C | ISO 11357-1/-3 |
| Glass Transition Temperature | 40°C | ISO 11357-1/-2 |
| Flammability @ 0.8 mm | HB | IEC 60695-11-10 |
| Flammability @ 1.5 mm | HB | IEC 60695-11-10 |
| Flammability @ 3.0 mm | HB | IEC 60695-11-10 |
| UL Yellow Card | Available | — |
The L1940 family also has a UL listing covering PA12 pellets, with HB flammability classification at several thicknesses.
Why Choose VESTAMID L1940 BK 9.7504?
The main reason to choose VESTAMID L1940 BK 9.7504 is its versatility.
Some PA12 grades are optimized for one narrow processing method. In contrast, L1940 is a medium-viscosity grade that can be used in both extrusion and injection molding. This gives processors more flexibility when a project includes different component geometries or both molded and extruded PA12 parts.
Its low coefficient of friction is another important advantage for cable systems. During cable installation, lower surface friction can reduce drag and make routing through conduits or guides easier.
The PA12 base also provides strong resistance to moisture and chemicals. This helps cable jackets and molded parts maintain dimensional stability when exposed to changing humidity, oils, fuels or industrial media.
For fiber-optic cable applications, VESTAMID L1940 also offers a proven technical position. Evonik specifically recommends L1940 for loose-tube cable protection and highlights stable high-speed extrusion, fast crystallization and resistance to filling compounds.
Processing Guidelines for VESTAMID L1940 BK 9.7504
VESTAMID L1940 BK 9.7504 can be processed by injection molding and cable extrusion. Evonik’s VESTAMID processing guide lists a general melt-processing temperature range of approximately 200–240°C for VESTAMID L1940.
| Processing Item | Typical / Recommended Guidance |
|---|---|
| Processing Methods | Injection Molding, Cable Extrusion, Other Extrusion |
| General Melt Temperature Range | Approx. 200–240°C |
| Product-Specific Test Melt Temperature | 240°C |
| Product-Specific Test Mold Temperature | 80°C |
| Supply Condition | Dry pellets in moisture-proof packaging |
| Storage | Dry storage in original packaging at ≤30°C |
VESTAMID compounds are supplied dry in moisture-proof packaging. If the original packaging is intact, the material is generally ready for processing. If pellets are exposed to ambient air long enough to absorb moisture, drying should be carried out according to Evonik’s general VESTAMID processing recommendations.
For cable extrusion, melt temperature, line speed, die design and cooling conditions should be optimized for conductor or tube dimensions. For injection molding, mold temperature, injection speed and holding pressure should be adjusted according to wall thickness and flow length.
The product-specific datasheet uses a melt temperature of 240°C and mold temperature of 80°C for shrinkage test specimens, while the general recommended processing range for the L1940 family is 200–240°C.
VESTAMID L1940 BK 9.7504 vs. VESTAMID L1670 BK 9.7504
| Feature | VESTAMID L1940 BK 9.7504 | VESTAMID L1670 BK 9.7504 |
|---|---|---|
| Base Polymer | PA12 | PA12 |
| Viscosity | Medium | Low |
| Primary Processing | Injection molding + extrusion | Thin wire / cable extrusion |
| Main Strength | Versatile extrusion and molding performance | High flow for thin insulation layers |
| Cable Applications | Wire insulation, sheathing, fiber-optic cable protection | Thin wire insulation and cable jacketing |
| Injection Molding | Yes | Less application-focused |
| Selection Reason | Broader processing versatility | Thin-layer extrusion and lower viscosity |
Choose VESTAMID L1940 BK 9.7504 when the project requires a medium-viscosity PA12 with both extrusion and injection-molding capability.
Choose VESTAMID L1670 BK 9.7504 when thin wire insulation or very low-viscosity cable extrusion is the primary requirement.
Related Products
VESTAMID L1670 BK 9.7504 – Low-viscosity PA12 for thin wire insulation and cable jacketing.
VESTAMID L1670 NC – Natural-color low-viscosity PA12 for wire and cable extrusion.
VESTAMID L2140 BK 9.7504 – PA12 grade for cable and fiber-optic applications requiring a different viscosity / processing profile.
View More PA12 Polyamide 12 Materials →
Technical Documents for VESTAMID L1940 BK 9.7504
| Document Type | Description |
|---|---|
| TDS | Technical Data Sheet with mechanical, thermal and processing properties |
| SDS | Safety Data Sheet |
| COA | Batch-specific Certificate of Analysis where available |
| UL Information | Relevant UL Yellow Card / flammability information |
| Compliance Documents | Relevant automotive, food-contact and regulatory documentation subject to availability |
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FAQ About VESTAMID L1940 BK 9.7504
Q1: What is VESTAMID L1940 BK 9.7504?
VESTAMID L1940 BK 9.7504 is a black, medium-viscosity, heat-stabilized PA12 resin from Evonik for injection molding, wire insulation and other extrusion applications.
Q2: Is VESTAMID L1940 BK 9.7504 suitable for cable extrusion?
Yes. The grade is specifically described for extrusion of wire insulation and is also relevant to cable sheathing and fiber-optic cable protection.
Q3: Can VESTAMID L1940 BK 9.7504 be injection molded?
Yes. VESTAMID L1940 BK 9.7504 is suitable for injection molding as well as extrusion.
Q4: What is the tensile modulus of VESTAMID L1940 BK 9.7504?
The typical dry tensile modulus is approximately 1,550 MPa according to ISO 527.
Q5: What is the elongation at break?
The published nominal strain at break is approximately 245%, showing the ductile character of this unfilled PA12 grade.
Q6: What is the melting temperature of VESTAMID L1940 BK 9.7504?
The typical melting temperature is approximately 177°C according to ISO 11357.
Q7: What is the molding shrinkage of VESTAMID L1940 BK 9.7504?
Published values are approximately 1.2% parallel and 1.3% normal according to ISO 294-4 / 2577.
Q8: What processing temperature is recommended for VESTAMID L1940 BK 9.7504?
Evonik’s general processing guide lists approximately 200–240°C for VESTAMID L1940. The product-specific datasheet uses a melt temperature of 240°C for shrinkage testing.
Q9: Is VESTAMID L1940 BK 9.7504 electrically insulating?
Yes. Current Evonik product information identifies the grade as electrically insulating, making it suitable for cable, wire and electrical applications.
Q10: Can you provide VESTAMID L1940 BK 9.7504 TDS, SDS and COA?
Yes. Please request the required documents through our Contact Page → or email ruiqingchem@gmail.com.
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