Adhesives packaging

Packaging (paper and plastic) packaging adhesives release coatings barrier coatings Photochemical machining (89) micromechanical parts optical waveguides... 

Case and carton sealing is a high volume application for hot melt adhesives. Typical formulas use 20-30% wax, 25-40% polymer, and 35-55% tackifier resin. The basic requirements for packaging adhesives will be described followed by formulating guidelines for specific market areas. The focus of this discussion will be on EVA and EnBA-based systems, which are the most common. 

Reducing the temperature by 75-100°F dramatieally improves the thermal stability of packaging adhesives, resulting in significant cost savings for equipment maintenance, as well as greater worker safety. Such adhesives became possible with the availability of low MW EVA base polymers (MI of 800 and above). They rely on low MW refined paraffin wax and a blend of resins chosen for the specific application [67,68]. 

Solvent-home urethanes are still widely used to bond leather and athletic shoes. The OEM automotive market uses some solvent-home urethanes together with chlorosulfonated polyethylene as a primer. Some urethane solvent-home packaging adhesives are used for cap liners and for paper and foil lamination. Some textile laminating applications are still based on solvent-home urethanes. 

One-component waterborne urethanes are used as packaging adhesives and tie coats and for automotive bonding of PVC. 

Report 122 Flexible Packaging - Adhesives, Coatings and Processes, T.E. Rolando, H.B. Fuller Company. 

End users who take the packaged adhesives and sealants and produce assembled products... 

Resolution Performance Polymers, Starting Formulations 4020, 4022, 4029, and 4031, One-Package Adhesives, Houston, TX, 2004. 

There are many applications for polymeric waterborne adhesives. These include packaging adhesives, pressure-sensitive tape, coatings for textiles, wood adhesives, and various industrial adhesives and coatings. The potential applications for waterborne epoxy adhesives are more limited due to their lack of tack and pressure-sensitive characteristics and the time it takes for the chemical reaction to complete cure. However, waterborne epoxy systems have found significant markets in niche areas. 

All of the curatives described so far are used to make two-package adhesives in which the curing agent is packaged separately from the epoxy resin. Once they are mixed, they have a limited pot life, usually less than a few hours. 

Small (much less than stoichiometric) amounts of diamines sometimes are added to the hydroxyl portion of the adhesive to provide a rapid but limited molecular weight increase as soon as the components are mixed.61,62 In this way a two-package adhesive can be made that will flow easily before mixing but will not readily flow after mixing. Such adhesives can be applied to vertical surfaces or overhead, and will remain in place until the bonds are closed and cured. 

The businesses of chemicals, coatings and plastics are closely linked, and those sectors, in turn, are closely linked to the oil and gas industry. Plastics comprise a branch of petrochemicals—that is, chemicals refined from petroleum. Total world consumption of oil for industrial uses is about 30 million barrels daily—mostly for use in chemical processes. Coatings, which include paints, are chemical concoctions. Other everyday chemicals products include pharmaceuticals, fertilizers, dyes, fibers, packaging, adhesives and explosives, among... 

Nitto Denko Corporation primarily manufactures industrial adhesive tapes for the electronics, automotive, health care, packaging and construction industries. The company produces industrial, electronic and functional products. Industrial products include double-coated adhesive tapes, masking tapes surface protective materials, sealing materials and label printing systems. Electronics products include LCD-related items general and advanced device resins printed circuit boards and semiconductor package adhesive sheets. Functional products include medical items such as transdermal therapeutic patches polymer separation membranes used for water purification and treatment and plastic engineering products such as information equipment and porous film materials used in cars, electronics, and home appliances. Nitto Denko America, Inc., an optoelectronics subsidiary, manufactures semiconductor... 

Food packaging adhesives and chemical migration into food... 

Chemical migration from food packaging adhesives... 

The majority of migration studies on food packaging adhesives have been done on materials laminated using reactive adhesive systems. Most of these have focused on polyurethanes. 

LAWSON, G. et al. (1996) Chemical composition and migration level of packaging adhesives. Summary report Polyurethane adhesives (solvent based). MAFF Project No. IC074. 

FDA approved under 21CFR178.2010 for use in acrylonitrile-butadiene-styrene copolymers at levels not to exceed 0.6% by weight of the copolymer. Section 177.1010 for use in semi-rigid and rigid acrylics at levels not to exceed 0.1% by weight of the plastic, and Section 175.105 as a component of food packaging adhesives. Also, approved by the FDA as an antioxidant in the preparation of rubber articles at a level not to exceed 5% by 21CFR177.2600. 

FDA approved per 21CFR175.105 in food packaging adhesives and 178.2010 for use in olefin polymers in food contact at usage levels not to exceed 0.1% by weight of finished product. 

Benzoflex [Velsicol], TM for a series of plasticizers that are dibenzoate esters of dipropylene glycol or any of several polyethylene glycols. Use Primary plasticizer for vinyl resins adhesive formulations some grades in food-packaging adhesives. 

Adhesives consumer and craftsmen adhesives (pastes and adhesives for home use) industrial and packaging adhesives engineering adhesives (high-performance sealants and systems) ... 

Ethylene acid polymer is obtained by the copolymerisation of ethylene with either acrylic or methacrylic acid. These copolymers are somewhat similar to LDPE and are found as ethylene acrylic acid (EAA) and ethylene methacrylic acid (EMA). Both are used in various packaging applications, i.e. flexible packaging, adhesive laminating, hot melts, and heat seal coatings. 

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