MOR-FREE™ 421

Mor-Free™ 421 is a solvent-free, 100% solids, two component polyurethane adhesive system that can be applied at room temperature. As the reactivity of Mor-Free™ 421 is high, the laminates can generally be further processed in as little as six hours. The chemical curing is generally completed within 3 days at room temperature (72 °F). As always, converters should verify appropriate cure times for their individual application. Mor-Free™ 421 can be used for laminating all polyolefin films, including LDPE to LDPE, OPP to OPP, and OPP to LDPE, as well as nylon, aluminum, polyester, and other packaging substrates. The films may be unprinted or reverse printed with the appropriate laminating grade inks.

Features & Benefits

Mor-Free™ 421 offers rapid bond development to decrease time needed for processing while offering good metal adhesion. Mor-Free™ 421 can be used for a wide range of applications at room temperature and below.

Product Details

Product Family:

Solventless Adhesives

Markets:

Food

Performance Benefits:

Fast Run Speed, Adhesion to high slip films, Easy Clean-up, Low Nip Temperature, Adhesion to Foil and Metallized Films, Fast Bond Development, Fast Slitting Time

Regulations:

FDA Regulation 21 CFR175.105

Applications:

Stand-Up Pouches, Large Format Bags, Snack Food Packaging, Frozen Food Packaging, Confectionary Packaging

Key Properties

Application Method

Smooth roll transfer

Coreactant

C-145, C-132-2, C-411

Coating Weight

0.8-1.2 lbs/ream

Chemistry

Polyurethane

Color

Clear Yellow Liquid

Density

9.5 lbs/gallon

Mix Ratio

100:33 with C-145, 100:63 with C-132-2, 100:40 with C-411

Key Performance Benefits

Fast bond development, good runability

Shelf Life

360 days

Applied Solids

100 %

Supplied Solids

100 %

Cure Time

3 days at 77 °F

Mixed Viscosity

750 cPs @ 120 °F

Nip Temperature

120 °F

Nominal Application Temperature

120 °F

Post Process Time

4-8 hours time to slit

Pot Life

30-40 min @ 120 °F

Substrates

LDPE to LDPE, OPP to OPP, and OPP to LDPE, as well as Nylon, Aluminum, Polyester

Viscosity

2,500-3,500 cPs

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Technical 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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