Knowde Enhanced TDS
Identification & Functionality
- Additives Included
- Chemical Family
- Polymer Name
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Characteristics
Promyde® BF940LN is a high viscosity polyamide without additives specially formulated for the production of films with a high transparency and improved elongation, tear and puncture resistance. Promyde® BF940LN can be processed in cast and blown film extruders.
Applications & Uses
- Markets
- Applications
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
- Application
Promyde® BF940LN is used for the production of coextruded cast and blown films that are suitable for thermoforming. It is specially recommended in the inner polyamide layer. Promyde® BF940LN assumes the function of a gas and aroma barrier, giving to the film outstanding mechanical properties and thermoformability. The main applications are casings, vacuum packs and thermoformed packs for food such as meat, fish and cheese.
- Processing Guidelines
Drying
Material is supplied pre dried and ready to process. Bags and containers should be stored in a dry place at room temperature. Storage time should not exceed twelve months. Material from open or damaged containers should be dried in a dry-air dryer at 75 to 80ºC, the drying time required will depend on the moisture content. Drying temperatures of above 80ºC should be avoided because of possible oxidation.
Extrusion Processing
Promyde® BF940LN may be processed on standard single-flighted, three-section screws. Better results can be obtained by using high-performance screws equipped with shearing and mixing sections. The screw length should be at least 24D, and preferably 28-33D to guarantee optimum plasticizing and conveying with the high through-put rates of film extrusion (D: screw diameter). A three-section screw should have a compression ratio (ratio of flight depth in the feed section to flight depth in the metering section) of 3:1 to 4:1.
It is recommended the length of screw sections as follows (L: overall length of screw):
- Feed section: 0.25 to 0.30 x L
- Compression section: 0.15 to 0.25 x L
- Metering section: 0.4 to 0.55 x L
Excellent processing and film properties can be obtained by using following temperatures at the extruder:
- Hopper: 40-50ºC
- Extruder: 210-250ºC
- Adapter&Die: 240-250ºC
Conditioning
Films made of Promyde® BF940LN will achieve their final dimensions and properties after equilibrium moisture absorption.
Properties
- Color
- Typical Properties
- Film Properties
- Specifications
| Value | Units | Test Method / Conditions | |
| Melting Point | 200.0 | °C | ISO 3146 |
| Crystallization Temperature | 145.0 | °C | ISO 3146 |
| Density | 1,11 | g/cm3 | ISO 1148 |
| Apparent Density | 0,67 | g/cm3 | NAPPA-059 |
| Chip Size (length-diameter) | 1,5-2,5 | mm | NAPPA-045 |
| Value | Units | Test Method / Conditions | |
| Stress at Break (MD) | 65.0 | MPa | ISO 527-3 |
| Elongation at Break (MD) | 400.0 | % | ISO 527-3 |
| Trouser Tear Force (MD) | 1.3 | N | ISO 6383-1 |
| Trouser Tear Resistance (MD) | 30.0 | N/mm | ISO 6383-1 |
| Puncture force (MD) | 6.3 | N | ISO 14477 |
| Puncture elongation (MD) | 5.6 | % | ISO 14477 |
| Puncture Energy (MD) | 18.0 | mJ | ISO 14477 |
| Haze | max. 0.5 | % | ASTM D1003 |
| Dynamic Coefficient of Friction (Film/Steel) | max. 0.25 | — | ISO 8295 |
| O2 Transmission Rate (23°C, 0% RH) | 25.0 | cc/m2.d | ASTM D3985 |
| O2 Transmission Rate (23°C, 50% RH) | 15.0 | cc/m2.d | ASTM D3985 |
| O2 Transmission Rate (23°C, 85% RH) | 25.0 | cc/m2.d | ASTM D3985 |
| Moisture Vapor Transmission Rate (23°C, 85% RH) | 20.0 | g/m2.d | ISO 15106-1 |
| Moisture Vapor Transmission Rate (38°C, 85% RH) | 65.0 | g/m2.d | ISO 15106-1 |
| Value | Units | Test Method / Conditions | |
| Melt Flow Rate (240°C/5Kg) | 17-20 | cc/10min | ISO1133 |
| Extractable | max. 1 | % | ISO 6427 |
| Viscosity Number | 254-272 | — | ISO 307 |
| Moisture content | max. 0,1 | cc/10min | NAPPA-032 |
Regulatory & Compliance
- Certifications & Compliance
Packaging & Availability
- Packaging Type
- Packaging
Promyde® BF940LN is supplied in moisture-proof packaging. Typical formats are Big Bags, Octabins, 25kg bags, and bulk silo trucks.
Storage & Handling
- Storage
All containers are perfectly sealed. The product should be stored in a dry place and opened just before processing.