Polyester foams

Textile uses are a relatively stable area and consist of the lamination of polyester foams to textile products, usually by flame lamination or electronic heat sealing techniques. Flexible or semirigid foams are used in engineered packaging in the form of special slab material. Flexible foams are also used to make filters (reticulated foam), sponges, scmbbers, fabric softener carriers, squeegees, paint appHcators, and directly appHed foam carpet backing. 

As will be discussed later, flexible polyester foams are not altogether satisfactory for upholstery applications and in the 1950s the attention of American chemists turned to the use of polyethers. These materials could be obtained more cheaply than the polyesters but the products were less reactive and with the catalyst... 

Today polyether foam with a density of less than half that of rubber latex foam is widely used as a cushioning material. Polyester foams, although tending to be more expensive, continue to have a number of outlets, particularly where a high initial modulus is desirable. In addition to miscellaneous upholstery applications... 

Flexible polyetherpolyurethane foams are used in cushions, upholstery, etc. While polyester based foams are used in textile laminates, coat shoulder pads, etc. Polyester foams can withstand drycleaning. 

Melt strength enhancement of PET and PBT for the production of blown polyester foams... 

Compared to polyethers, polyester foams generally present ... 

THERMOPLASTIC POLYESTER FOAMS FOR THE MANUFACTURE OF SANDWICH PANELS... 

A polyester foam with a negative Poisson s ratio has been reported by Lakes. Its cells consist of reentrant faces. Figure 19.4 shows a cell with 24 faces. When the cell is extended its sides are moved inward and when it is compressed the walls move outward. The negativity of v increases with 9. 

F. 6. Dependence of the volume fraction of open cells on apparent density 7 and volume fraction of polyn ric phase dp for PUR foams 1 composition based on polyester foamed by carbon dioxide 2 precipitation plastic foam, (according to data of Salyer and co-work-ers83)... 

Fig. 15 a and b. Schematic views (a) cell of rigid polyester foam and (b) magnesia polycrystal... 

Fig. 16. Mean cell diameter D as a function of the number of planes n in the polygons of polyester foam cell sections...

Classification. Flexibie urethane foams have the largest market of all polyurethane products. The production properties and applications of various flexible urethane foams are described in the following sections. Flexible urethane foams are defined as open-cell urethane foams having the property of complete recovery immediately after compression. They can be classified into two kinds, i.e., polyether foams and polyester foams. Polyether foams are further classified as follows conventional flexible foams, high-resilience flexible foams (HR foams), cold-molded foams, super-soft foams, and viscoelastic foams. 

Flexible polyester foam Flexible polyether foam HR foam... 

Mazzola, M., Masi, P., Nicolais, L., and Narkis, M., Fiber Reinforced Polyester Foams, J. Cellular Plastics, Sept./Oct. (1982), p. 321. 

MISCELLANEOUS AND SPECIALTY FOAMS (Epoxy Foams, Polyester Foams, Silicone Foams, Urea-Formaldehyde Foams, Polybenzimidazole, Foams, Polyimide Foams, Polyphosphazene Foams, and Syntactic Foams)... 

True random orientation mounts are difficult to prepare, and numerous techniques for filling powder sample holders have been described (Brindley and Brown, 1980). For example, powder samples have been embedded in plastic (Brindley and Kurtossy, 1961), polyester foam (Thompson et al., 1972), mixed with powdered cork (Wilson, 1987), pasted in acetone prior to smearing onto glass slides (Paterson et al., 1986) and spray dried (Hillier, 2002). 

Use Polyester foams, insect repellent, alkyd modifier, plasticizers, urethanes, synthetic lubricants. 

MAJOR PRODUCT APPLICATIONS bowling balls, cast polyester, foam, caulk, explosives, putties, sealants, pipe insulation, potting compounds, speckling compounds, reflective paints, golf balls, pultrusion, aerospace, marine, automotive, composites, and many more... 

Park CB, Liu YJ, Naguib HE. Challenge to forty-fold expansion of biodegradable polyester foams using carbon dioxide as a blowing agent. Cell Pol 1999 18 367-384. 

---