Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Additives Included
- Chemical Family
- Polymer Name
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Characteristics
- High transparency
- Lower melt temperature (165ºC), suitable for coextruded films with temperature sensible polymers such as EVOH
- Low crystallization speed, low curling in asymmetrical coextruded films
- Low modulus, high deformation at break, excellent tear and puncture resistance
- Sealing starting at 110-130ºC (depending on the sealing equipment), possible design of a monolayer recyclable packaging
- Higher oxygen/CO2 permeability, specially recommended for cheese and other products requiring gas release
Applications & Uses
- Markets
- Applications
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
- Application
Promyde® BF640 LN is recommended for the production of:
- Coextruded symmetric and asymmetric cast and blown films with very low curling
- Monolayer recyclable packaging
- Coextruded films with temperature sensible products (e.g. EVOH)
- Packaging of cheese and other products requiring gas release
- Processing Guidelines
Drying
Material is supplied pre dried and ready to process. Bags should be stored in a dry place at room temperature. Storage time should not exceed twelve months. Material from open or damaged bags should be dried in a dry-air dryer at 60ºC, the drying time required will depend on the moisture content. Drying temperatures of above 60ºC should be avoided because of possible oxidation.
Extrusion Processing
Promyde® BF640 LN 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: 200ºC
- Adapter&Die: 200ºC
Conditioning
Films made of Promyde® BF640 LN will achieve their final dimensions and properties after equilibrium moisture absorption.
Properties
- Color
- Typical Properties
Value Units Test Method / Conditions Melting Point 165.0 °C ISO 3146 Crystallization Temperature 85.0 °C ISO 3146 Density 1,1 g/cm3 ISO 1148 - Film Properties
Value Units Test Method / Conditions Modulus (MD) 500-1000 MPa ISO 527-3 Stress at Break (MD) 45-55 MPa ISO 527-3 Elongation at Break (MD) 350-450 % ISO 527-3 Trouser Tear Force (MD) 2-2.5 N ISO 6383-1 Trouser Tear Resistance (MD) 35-50 N/mm ISO 6383-1 Puncture Energy (MD) 2021-10-15 mJ ISO 14477 Haze max. 0.5 % ASTM D1003 O2 Transmission Rate (23°C, 0% RH) 75.0 cc/m2.d ASTM D3985 O2 Transmission Rate (23°C, 50% RH) 60.0 cc/m2.d ASTM D3985 O2 Transmission Rate (23°C, 85% RH) 90.0 cc/m2.d ASTM D3985 Moisture Vapor Transmission Rate (23°C, 85% RH) 10.0 g/m2.d ISO 15106-1 CO2 Transmission Rate (23°C, 0%RH) 272.0 cc/m2.d ASTM F2476-13 - Specifications
Value Units Test Method / Conditions Melt Flow Rate (240°C/5Kg) 15-25 cc/10min ISO1133 Monomer Content max. 0.5 % ISO 6427 Moisture content max. 0,1 % NAPPA-032
Regulatory & Compliance
- Certifications & Compliance
Packaging & Availability
- Packaging Type
- Packaging
Promyde® BF640 LN is supplied in 25Kg moisture-proof packaging.
Storage & Handling
- Storage
The product should be stored in a dry place and opened just before processing.