Novamont S.p.a.

Roberto Ponti

Catia Bastioli

Gianfranco Del Tredici

Vittorio Bellotti

Italo Guanella

Alessandro Montino

Claudio Russo

Giovanni Floridi

Tiziana Milizia

Angelos Rallis

Roberto Lombi

Maurizio Tosin

Gianfranco D Tredici

Stefano Facco

Angelo Rallis

A multilayer film comprising two layers, A and B, having a A/B/A arrangement, wherein layers A and B differ from each other. Layer A comprises an aliphatic and/or aliphatic-aromatic biodegradable polyester or a polyvinyl alcohol or copolymers thereof and does not contain starch. Layer B comprises 30-95% by weight of at least an aliphatic-aromatic polyester (AAPE), 0.1-50% by weight of at least a polymer of natural origin, and 1-40% by weight of at least a polyhydroxyalkanoate (PHA). The multilayer biodegradable film which is particularly suitable for the manufacture of packaging and has appreciable optical transparency properties in addition to high level mechanical properties.

Multilayer biodegradable film

This invention relates to a biodegradable polyester which is particularly suitable for use for the manufacture of wrapping films for packaging, comprising units deriving from at least one diacid and at least one diol, characterized by a high static friction coefficient in comparison with conventional biodegradable polyesters. A further object of this invention is a wrapping film comprising the said biodegradable polyester.

Biodegradable polyester and wrapping films for packaging produced therewith

Bag made of a breathable biodegradable uniform film having thickness from 10 to 40 &#x3bc;m and with permeability to water greater than 950 g 30 &#x3bc;m/m24 h in which the biodegradable film comprises starch and possibly a thermoplastic polymer insoluble in water with melting temperature between 60&#xb0; C. and 150&#xb0; C.

Highly-breathable biodegradable film bag

A biodegradable mixture obtained by melt mixing polyesters comprising (A) an aliphatic polyester obtained from aliphatic diacids selected from the group consisting of azelaic acid, sebacic acid, brassilic acid, mixtures thereof and mixtures of said acids with aliphatic dicarbossilic acids and/or aliphatic hydroxyacids containing more than 50 mole % of azelaic acid, sebacic acid and brassilic acid, and from aliphatic diols; (B) a polymer of lactic acid in which the concentration by weight of A with respect to (A+B) is in the range of 30 to 60% and in which the sum of the fusion entalpy &#x394;Hand &#x394;Hof the two polyesters in the mixture is greater than the sum of the fusion entalpies &#x394;Hand &#x394;Hof the polyesters prior to melt mixing.

Binary mixtures of biodegradable aliphatic polyesters and products obtained from these

The invention relates to a mixture of biodegradable polyesters which includes an aromatic-aliphatic polyester (A), an aliphatic polyester (B) and a polylactic acid polymer (C) in which the concentration of A varies, with respect to (A+B) in the range between 40 and 70% by weight, and the concentration of C with respect of (A+B+C) is of between 6 and 30% by weight.

Ternary mixtures of biodegradable polyesters and products manufactured from them

The invention relates to a mixture of biodegradable polyesters comprising: (A) a polyhydroxy acid of the poly-&#x3b5;-caprolactone type and its copolymers, (B) aliphatic polyester, and (C) a polymer of polylactic acid, in which the concentration of (A) varies with respect to (A+B) in the range between 40 and 70% by weight, and the concentration of (C) with respects to (A+B+C) lies between 2 and 30%.

Ternary mixture of biodegradable polyesters and products obtained therefrom

The invention relates to a mixture of biodegradable polyesters which includes an aromatic-aliphatic polyester (A), an aliphatic polyester (B) and a polyactic acid polymer (C) in which the concentration of A varies, with respect to (A&plus;B) in the range between 40 and 70% by weight, and the concentration of C with respect to (A&plus;B&plus;C) is of between 6 and 30% by weight.

Biodegradable foamed plastic material having a bulk density comprised within the range of from 5 to 13 kg/m.sup.3, comprising:

Biodegradable foamed plastic materials

The film-forming polymeric compositions described include a synthetic, thermoplastic polymer and a starchy material, with a high amylopectin content; they enable the production of films, sheets and the like having good liquid- and gas-barrier effects and improved mechanical properties.

Film-forming, starchy, polymeric composition and shaped articles,

The method of producing plasticized polyvinyl alcohol by mixing polyvinyl alcohol in the presence of an organic plasticizer and water in a quantity which is insufficient to dissolve the polyvinyl alcohol under normal conditions, includes the steps of:

Method of producing plasticized polyvinyl alcohol and its use for the

The biodegradable polymeric compositions comprise a starch based component and a polymeric component comprising polymers of hydroxyacids or mixtures thereof with polymers deriving from ethylenically unsaturated monomers, particularly polymers of ethylene-vinylalcohol or polyvinylalcohol.

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Oleggio, Italy

Roberto Ponti