LOCTITE® LIOFOL® LA 6094-22

Target Application

• A fast curing aliphatic non-yellowing adhesive system for film/film packaging laminations.
• It may be used for general laminating of film/film packaging laminations including those that utilize high slip films.
• Primarily used for outdoor bag applications requiring an adhesive which will not yellow under UV or sunlight. Not to be used for food packaging applications.
• Caution: Due to the wide variability of film additives, materials, surface conditions, process conditions, and performance criteria, pretesting on your substrates and production equipment is required to determine if this adhesive system will meet all your needs.

Other Applications

• This adhesive also can be used for general-purpose food packaging laminations, health care, pharmaceutical and cosmetic applications.

Adhesive Selection

• The selection of the adhesive system, substrates, and process conditions are critical to the success of the final structure.
• Thorough qualification on your equipment and substrates is recommended before commercial production begins.

Adhesive Mixing

• This adhesive system requires the use of Meter/Mix/Dispense (MMD) equipment that will automatically measure and mix the correct amounts of adhesive and deliver them to the laminator.
• Verification that the unit is providing the correct amounts of adhesive and coreactant is recommended prior to startup.
• If the MMD unit is capable of phasing issues (one material enters the static mixer before the other) verification that each side is being dispensed at precisely the same time is required.
• The adhesive is sensitive to moisture. Tanks or large containers such as drums will require nitrogen purging or the attachment of a desiccant dryer.
• A DRIERITE desiccant unit is supplied (upon request) with the first drum to ensure that dry air enters the drum as adhesive is withdrawn.

Pot Life

• Typically, the mixed adhesive has a working time of 30 minutes. If an equipment shutdown continues beyond this time, clean all the coating rollers in the application station and purge the mixer attached to the meter/mix/dispense unit.
• Adhesive that is left on the rollers for a long period of time will become extremely difficult to remove.

Application Method

• The recommended method of application for this product is with a series of rubber and steel, smooth surface transfer rollers on a specially designed solventless adhesive laminator.
• The adhesive is mixed by the MMD unit, deposited onto the first two rollers, and metered by the remaining rollers in the application station (typically 3 to 5 rollers).
• To improve the flow characteristics of the adhesive, heat the first two rollers to 90 - 105°F. The final application roller should be heated to 110 - 140°F.
• Modification of these temperatures may be required depending on line speed, substrates, and roller size.

Coating Weight

• The coating weight will be dependent upon the film or foil combination, the end use of the lamination, and the thickness of the printing inks.
• Typically 0.8 - 1.5 lb/ream (1.3 - 2.4 gm/m²) is suggested.

Combining Nip

• Nip temperatures of 120 - 175°F are generally recommended.
• Higher nip temperatures may be required depending on the line speeds, thickness, and substrates being bonded.

Initial Tack

• There will be little or no initial tack with most solventless adhesive systems.
• Proper tension control during processing and winding will produce a good lamination.

Appearance Off-line

• Very small bubbles (1/2 mm) between the layers of the lamination are typical off line. With proper winding parameters, the adhesive will flow and the bubbles will dissipate by the following day.
• To obtain maximum optical properties, a rewind temperature of 85 - 105°F may be used.

Curing

• If stored at room temperature (77°F), the laminate normally can be rewound and slit after one day. Bond development should be monitored.
• To achieve maximum chemical and thermal resistance, allow 3 - 7 days of storage at room temperature.
• Cure rate may depend on film combination.
• If rolls are subjected to low temperatures, a substantially longer cure time may result.

Clean Up

• Clean up is accomplished with solvents such as ethyl acetate, methyl ethyl ketone or acetone.
• Care should be taken to insure the solvent used would not damage the rubber rollers in the application station.
• Protective gloves should be worn and proper ventilation is recommended. 

• The LA 7998 adhesive has a storage life of nine months. The LA 6094-22 curative has a storage life of twelve months.
• Both components should be held at normal warehousing temperatures and stored in the original, unopened containers.
• Containers of the adhesive or curing agent should not remain open for an extended period of time.
• Material from opened containers should be consumed within a short period. It is necessary to use all the adhesive once the container is opened, unless there is means of purging the container with dry nitrogen.
• If exposed to below freezing temperatures, these products may solidify.
• Large containers (drums and pails) may be slow to reliquify. Slight warming at 104 - 122°F (40 - 50°C) will aid the process.
• Freezing and thawing have no effect on the performance of this product.

• The adhesive, as received, has chemically active Isocyanate groups that will react with water, alcohols, amines, and similar materials containing active hydrogen groups.
• Reseal containers and keep them tightly closed to maximize the storage life.
• Nitrogen purging of original containers will have a similar effect.
• Upon request, a DRIERITE® desiccant unit will be supplied with the first drum to insure that dry air enters the drum as adhesive is withdrawn.
• Positive fresh air ventilation is necessary: otherwise use air supplied hood or chemical facemask.
• Avoid prolonged breathing of vapors and mists.
• In case of persistent coughing, call a physician.
• Keep adhesive away from heat, sparks and open flame.
• Avoid prolonged contact with skin.
• Wash hands thoroughly after using or before smoking or eating.
• Harmful or fatal if swallowed. If swallowed, Do not induce vomiting. Drink one or two glasses of water, and call a physician immediately.