LAMAL 408-40

Lamal™ 408-40 adhesive is the polyether urethane component of a two-component laminating adhesive which requires the use of a coreactant. This polyether urethane, in conjunction with coreactant Lamal C or Lamal CR-1-80, functions as an adhesive for flexible packaging. Lamal 408-40 adhesive adheres to a wide variety of substrates including cellophane, treated polyolefins, paper, polyester, polyamides, PVDC-coated and metallized materials, vinyl, and treated heat sealable layers of coextrusions. The optimum performance of the Lamal 408-40 adhesive is achieved when substrates are corona treated.

Features & Benefits

Lamal™ 408-40 adhesive is different from most conventional polyurethane adhesives in that it is not affected by alcohols or small amounts of water.Lamal 408-40 adhesive provides optical clarity, high bond strength, high heat resistance and moderate chemical resistance.

Key Properties

Application Method
Gravure
Coreactant
LAMAL C; LAMAL CR1-80
Coating Weight
1.2-1.7 lbs/ream
Carrier
Denatured Ethanol
Chemistry
Polyether Urethane
Color
Colorless to Light Yellow Liquid
Density
7.9 lbs/gallon
Mix Ratio
100:7.5 for Lamal C, 100:9.5 for Lamal CR 1-80
Recommended Diluent
Isopropanol, Denatured Ethanol
Drying Web Temperature
150-180 °F
Key Performance Benefits
Great clarity, good for solvent sensitive films, great clarity
Shelf Life
180 days
Applied Solids
20-30 %
Supplied Solids
65 %
Solvent
Denatured Ethanol
Thinner
iso-Propanol, Denatured Alcohol
Cure Time
5 days @ Room Temperature
Mixed Viscosity
11,000 cPs
Nip Temperature
120-150 °F
Nominal Application Temperature
Room Temperature
Post Process Time
12-24 hours time to slit
Pot Life
> 8 hours
Substrates
PE, PP, PET, PVDC-coated substrates, Paper, Nylon, Cellophane, PVC
Viscosity
10,000 cPs

Techincal Resources

The Importance of Quality Control Testing By being diligent in recording and monitoring tests for each laminated structure many potential laminate problems can be averted. Read More...
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