Flextra® SBA 5250 + XA 3350

1 of 49 products in this brand
Flextra® SBA 5250 + XA 3350 is a high-performance, solvent-based, two-component aliphatic polyurethane adhesive system engineered for demanding flexible packaging applications. It offers superior bonding strength, supports high-speed lamination, and cures effectively at room temperature. With high solids content, it enhances productivity while reducing emissions. Fully compatible with PP flexible recycling, it also meets broad food safety standards, including FDA and EU compliance.

Compatible Substrates & Surfaces: Aluminum Foils, Nylon, Polyesters, Polyethylene (PE), Polyethylene Terephthalate (PET), Polyolefins, Polypropylene (PP)

Features: Boiling Resistance, Good Bonding Strength, Heat Resistance, High Bond Strength, High Performance, High Solids Content, Low Migration, Pasteurization Resistance, Room Temperature Curing

Technical Data Sheet
  • TypeDocument Name
View All Documents

Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Markets
Applications
Application Area
Compatible Substrates & Surfaces
Product Applications
  • SBA 5250 + XA 3350 is suitable for lamination of printed and unprinted, transparent, metallized and aluminium foil containing triplex structures. SBA 5250 + XA 3350 can be used for lamination of aluminium foil, polyester, coated cello, nylon, polyethylene, oriented and Cast-polypropylene as well as SiOx or AlOx coated webs.
  • Structures laminated with SBA 5250 + XA 3350 are resistant to boiling, pasteurisation, sterilisation and show good resistance to aggressive packed goods. Structures laminated with SBA 5250 + XA 3350 show after curing high bond strength and good heat resistance.
  • SBA 5250 + XA 3350 is suitable for lamination of olefin films with high content of slip additive (500 ppm erucamide calculated on 70μ film thickness).
Mixing Instruction

SBA 5250 + XA 3350 should be diluted to the desired solid content according following table:

SBA 5250 30% 35% 40% 45% 50%
Solvent 100 100 100 100 100
XA 3350 131 92 62 39 20
Total 47 47 47 47 47
Viscosity (sec/DIN 4mm) 278 239 209 186 167
Solvent Ethyl Acetate 12 13 15 17 22
Combining Information

Increased temperature of the nip roller improves wetting and transparency of the laminates. Depending on kind of laminated films and machine speed nip temperatures of 40°C – 70°C are recommended.

Properties

Component A
ValueUnitsTest Method / Conditions
Solids Content59 - 61%
Viscosity (at 25°C)500 - 1000mPa.s
Density1.02
Component B
ValueUnitsTest Method / Conditions
Solids Content49 - 51%
Viscosity (at 20°C)11 - 13secDIN 4mm
Density0.99
Specifications
ValueUnitsTest Method / Conditions
Mix Viscosity (at 40°C)approx. 1200mPa.s
Mixing Ratio (parts by weight %)100 : 47
Mixing Ratio (parts by volume %)100 : 48
Cross Linking Properties

The cross-linking reaction starts immediately after lamination, rewind and slitting often might be possible after 24 to 48 hours. Laminates manufactured with SBA 5250 + XA 3350 should be cured at 40°C – 45°C for 5 days. Final cure at ambient temperature is achieved approx. 7 to 10 days after lamination.

Additional Information

It is recommended that the converter does his own lamination trials and tests of the resulting laminated structure because additives, especially out of polyolefin films and printing inks, can affect the properties of the structure immediately or later. For olefin films corona-pre-treatment is necessary. Corona-pre-treatment of polyester- and nylon-films improves wetting and adhesion.

Regulatory & Compliance

Certifications & Compliance
Food Contact Status

SBA 5250 + XA 3350 can be used to produce flexible packaging material intended for use in food packaging. Detailed information on specific regulations are available upon request.

Technical Details & Test Data

Coating Weight
Unprinted film/film-laminates, standard 2.2 – 2.5 g/m²
Printed film/film-laminates, standard 3.0 – 3.5 g/m²
Problematic printing inks vacuum packing, boil in bag and aggressive packed goods 4.0 – 5.0 g/m²
Drying Information

A web temperature of 50°C – 65°C with good air volume is usually adequate for complete solvent removal.

Safety & Health

Safety Instructions

SBA 5250 + XA 3350 are highly flammable. The products should be stored at a dry and cool place.

Packaging & Availability

Regional Availability
  • Global

Storage & Handling

Storage Conditions

The product SBA 5250 + XA 3350 maintains its stability in an unopened original container until the shelf life date indicated on the product label. Once opened, the containers – especially XA 3350 – must be used within 24 hours. Opened containers should be well closed again.

Pot Life

The dynamic pan stability of the mixed adhesive is more than 24 hours, a fresh mix should be made every 8 hours.