Foams recommended adhesives

The method of adhesion of the plates to the foam surfaces and the type of adhesive used are all-important in this test and, depending on the nature of the polymer, epoxy- or polyester-based adhesives are recommended. 

Solvent cements are usually preferable to conventional adhesives for thermoplastic structural foams. Some solvent cements and solvent-containing, pressure-sensitive adhesives will collapse thermoplastic foams. Water-based adhesives based on SBR, polyvinyl acetate, or neoprene are frequently used. Solvent cementing is not effective on polyethylene foams because of their inertness. Recommendations for adhesives for thermoplastic foams are ... 

Phenylene oxide-based resins (Noryl ) epoxy, polyisocyanate, polyvinyl butyral, nitrile rubber, neoprene rubber, polyurethane rubber, polyvinyUdene chloride, and acrylic. Polyethylene-nitrile rubber, polyisobutylene rubber, flexible epoxy, nitrile-phenolic, and water-based (emulsion) adhesives. Polystyrene for these foams (expanded polystyrene (EPS)), aromatic solvent adhesives (e.g., toluol) can cause collapse of the foam cell walls. For this reason, it is advisable to use either 100% solids adhesives or water-based adhesives based on SBR or polyvinyl acetate. Specific adhesives recommended include urea-formaldehyde, epoxy, polyester-isocyanate, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, and reclaim rubber. Polystyrene foam can be bonded satisfactorily with any of the following general adhesive types ... 

These adhesives are mostly used for the military market and are designed for service between 149°C and 260°C. Epoxy-phenolics, however, do not withstand exposure to 177°C as well as nitrile-phenolics. Since cure at 177°C tends to cause outgassing and foaming, 93°C cure for 24 hours is recommended. 

Polystyrene parts are conventionally solvent cemented or heat welded. However, urethanes, epoxies, unsaturated polyesters, and cyanoacrylates will provide good adhesion to abraded and solvent cleaned surfaces. Hot-melt adhesives are used in the furniture industry. Polystyrene foams will collapse when in contact with certain solvents. For polystyrene foams, a 100 percent sohds adhesive or a water-based contact adhesive is recommended. 

Recommended for products adhesives, sealants backing and foams latex for carpet... 

Proportioning and mixing procedures. When an adhesive is to be mixed, the components should be accurately measured, and mixing should be of the recommended type and intensity. The objective is to achieve a uniform, lump-free mix without overheating, entraining air (unless a foam-type mix is intended)... 

The Daltoflex A-10 system is recommended as an air-curing (2—7 day/25°C, <1 day/ 100 C) adhesive for textile applications (fabric-fabric, fabric-foam) since it affords good green strength and good hand, and for film-film lamination since it produces clear laminates which resist separation due to mechanical and thermal stress. ... 

Polyurethane epoxy, polyester, polyacrylate, polyhydroxyether, nitrile rubber, butyl rubber, water-based (emulsion), polyurethane rubber, neoprene, SBR, melamine-formaldehyde, and resorcinol-formaldehyde are specific types. Generally, a flexible adhesive should be used for flexible polyurethane foams. Synthetic elastomer adhesives with fast-tack characteristics are available in spray cans. Solvent-based neoprenes are recommended for resistance to stress, water, and weathering. Solvent-based nitriles are recommended for resistance to heat, solvents, and oil. Water-based adhesives... 

Recommended for products sealants, adhesives, coatings, foam ... 

Recommended for products adhesives, blood bags, cellular rubber goods, film sheeting, gaskets, general purpose film, industrial hose and tubing, low viscosity plastisols, packaging, sealants, PVC film, vinyl foam ... 

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