W. R. Grace Co.-conn.

W. R. Grace & Co., Cryovac Div.

W. R. Grace Co.

Francesco Martini

Luigi Perazzo

Paolo Vietto

Laminated sheet material 9 comprises a laminate of a polyvinyl alcohol or other water-disintegratable film 12 with a thin coextruded film comprising a melt-bondable layer 15 and an impermeable layer 14. The laminate is odor impermeable but water disposable and so can be used to form a toilet-disposable ostomy bag by melt-sealing around the edges 10 between the facing melt-sealable surfaces 15.

Method of making a laminate

The film is formed by a composition comprising a mixture of 50-100 weight % of an ethylene-butyl-acrylate copolymer (EBA) having a content of butyl-acrylate (BA) of 5-50 weight %, and 0-50 weight % of an elastomeric polyolefin. Laminates comprising a layer constituted by said film have excellent characteristics of noiselessness and softness.

Noiseless polymeric film, and containers for medical use made thereof

Laminated articles

HB polymers, such as copolymers of hydroxy butyric acid and hydroxy valeric acid, are provided as melt extruded films having a thickness of 5 to 200 .mu.m. Sheet materials may consist of such a film or the film may be laminated with other films to increase strength or impermeability. The films are best made by co-extrusion with a thermoplastic that is substantially non-tacky upon solidification. The sheet materials are of particular value as diaper backsheets and ostomy bags. They may include a layer of non-woven material.

Manufacture of polymeric products

Sheets materials of HB polymers

This invention relates to films which have a high degree of silence and pliability and comprise at least one layer formed from a polymeric blend which includes about 40% to 60% by weight of any ethylene and vinyl-acetate copolymer and about 60% to 40% by weight of an elastomeric polyolefin. The elastomeric polyolefin preferably comprises a blend or 'alloy' of an ethylene and vinyl-acetate copolymer and an elastomeric ethylene and propylene copolymer. Such films are particularly useful for manufacturing drainage containers or bags for medical applications.

Silent film for ostomy pouches

A heat-sterilizable laminate film especially useful for making disposible pouches for sterile injectable compositions comprises an ethylene-vinyl acetate copolymer layer and on either side of the said layer a layer of a propylene-ethylene copolymer which may contain an impact modifier. The laminate may be cross-linked by irradiation.

Growing community of inventors

Rho, Italy

Francesco Martini