Mor-Free L 75-275 September 2011 Page 1 of 4

MOR-FREETM L 75-275

Solventless Laminating Adhesive 

Description

Mor-Free L 75-275 is a solvent-free, 100% solids, single component, self-curing polyurethane laminating 

adhesive. It is used in flexible packaging constructions including metallized substrates and paper laminations 

such as bleached kraft and clay coated paper.

Typical Properties*

Appearance Hazy, colorless to light straw

Solids 100%

Viscosity (Brookfield)

at 90C 2350 cp

at 40C 125,000 cp

Density 9.2 lb/gal

Shelf Life** 360 days (unopened containers)

*These items are provided for general information only. They are approximate values and are not 

considered part of a product specification.

**Store in tightly closed container in cool, dry place.

Mor-Free L 75-275 may react or interact with other components of laminations. Retained volatiles (solvents 

or water), slip additives, antiblock agents, and inks are some of the components that may cause property 

changes of the laminated structure. If Mor-Free L 75-275 is used on high slip films (COF < 0.2) or with high 

slip LDPE/LDPE laminations, then the user must verify that potential film property changes due to the 

lamination process and materials are acceptable for the end use performance requirements.

Typical Uses

Some typical constructions using Mor-Free L 75-275 are:

1 mil foil to 10 pt bleached kraft paper

1 mil foil to 12 pt clay coated paper

.00035 aluminum foil to 35 lb bleached paper

Other types of laminates are possible and should be tested.

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PACKAGING AND

CONVERTING
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Adhesive Application 

Laminators must be equipped with a heated fountain and heated applicator rollers. Best adhesive 

application is obtained when the adhesive is heated to a typical temperature of 194F (90C).

The optimum amount of coating weight necessary for good bonding varies with the end use requirements. It 

is suggested that initial evaluation be carried out at a range of 2.0-3.5 lb/ream.

The adhesive containers need to be preheated in an oven to operating temperature before filling the 

applicator system. Do not heat the sealed containers any longer than 16 hours because the adhesive may 

become viscous and gel.

Combining 

Best results are obtained at combining roll temperatures of 100-150F. Film tension has to be controlled 

very carefully to eliminate tunneling or worming in the wind-up roller.

Bond Formation

This adhesive does not provide any green strength off the laminator. Bond develops in tightly wound rolls in 

6-18 hours at room temperature storage. Optimum properties are obtained in 5-7 days.

Clean-Up 

Applicator rolls can be cleaned with isopropyl or ethyl alcohol. If the adhesive has cured on the applicator 

rolls, MEK is recommended for cleaning.

Safety, Handling and Storage

 Store in cool, dry, well ventilated area away from heat and ignition sources. Keep container tightly 

closed.

 Follow good manufacturing and handling practices.

 Wash thoroughly after handling. Wash contaminated goggles, face shield, and gloves. 

Professionally launder contaminated clothing before re-use.

 ATTENTION! Container can be hazardous when empty. Follow label warnings even after container 

is empty. Do not reuse empty container without professional cleaning.

 Refer to Material Safety Data Sheet for more information.
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______________________________________________________________________

Mor-Free is a registered trademark of Rohm and Haas Company.

These suggestions and data are based on information we believe to be reliable. They are offered in good faith, but without guarantee, as 

conditions and method of use of our products are beyond our control. We recommend that the prospective user determine the suitability of 

our materials and suggestions before adopting them on a commercial scale.

Suggestions for uses of our products or the inclusion of descriptive material from patents and the citation of specific patents in this 

publication should not be understood as recommending the use of our products in violation of any patent or as permission or license to use 

any patents of the Rohm and Haas Company.

0

5000

10000

15000

20000

25000

30000

135 145 155 165 175 185 195

Brookfield Viscosity (#27/20)

Temperature (°F)

Viscosity vs. Temperature of Mor-Free 

L 75-275
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Rohm and Haas Food and Drug Opinion

Name: MOR-FREE L75-275 

Regulation Complies Opinion 

Date Limitations

21CFR175.105 Y 09/15/2011

Legend:

L Yes, this product is cleared with limitations noted

N No, this product is not cleared

Y Yes, this product is cleared.

A Affirmed as compliant based on migration studies.

Regulations:

21CFR175.105 Adhesives

Disclaimer:

 This information relates specifically to this product. We believe this information to be accurate and 

reliable as of this date.

 We recommend that our customers make their own determination on the suitability of this product for 

their particular application.

 We cannot guarantee that the indirect food additives/food-contact status of this product will remain 

unchanged indefinitely; therefore we recommend that you periodically verify its status.