Antimicrobial composite material
AssigneesConsejo Superior de Investigaciones Cientificas, Encapsulae, S.L.
InventorsJosé Francisco Fernández Lozano, Julián Jimenez Reinosa, Alberto Moure Arroyo, José Javier Menéndez Medina
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Abstract
The present invention relates to activated and ground sodium hexametaphosphate frit particles and antimicrobial composite material comprising said activated and ground sodium hexametaphosphate frit particles embedded in a thermoplastic polymer such as low density polyethylene (LDPE). The invention also relates to the method for obtaining the composite material of the invention and a thermal activation method for the thermal activation of a sodium hexametaphosphate salt in order to generate the activated and ground sodium hexametaphosphate frit particles. The antimicrobial material of the invention is preferably used in the food industry.
Claims16
A composite material comprising:
- a) activated and ground sodium hexametaphosphate frit particles obtainable by means of a thermal activation method comprising the steps of:
- i) heating a sodium hexametaphosphate salt until it melts such that a molten sodium hexametaphosphate salt is obtained;
- ii) abruptly cooling the molten sodium hexametaphosphate salt obtained in step (i) in a dry medium to obtain activated sodium hexametaphosphate frit particles;
- and
- iii) grinding the activated sodium hexametaphosphate frit particles obtained in step (ii) to obtain activated and ground sodium hexametaphosphate frit particles;
- and
- b) a polymer matrix;
- wherein said composite material comprises the activated and ground sodium hexametaphosphate frit particles in a mass percentage less than 60%;
- and
- wherein said activated and ground sodium hexametaphosphate frit particles are embedded in said polymer matrix.
A composite material comprising:
- a) activated and ground sodium hexametaphosphate frit particles obtainable by means of a thermal activation method comprising the steps of:
- i) heating a sodium hexametaphosphate salt until it melts such that a molten sodium hexametaphosphate salt is obtained;
- ii) abruptly cooling the molten sodium hexametaphosphate salt obtained in step (i) in a dry medium to obtain activated sodium hexametaphosphate frit particles;
- and
- iii) grinding the activated sodium hexametaphosphate frit particles obtained in step (ii) to obtain activated and ground sodium hexametaphosphate frit particles;
- and
- c) a polymer matrix;
- wherein said composite material comprises the activated and ground sodium hexametaphosphate frit particles in a mass percentage comprised between 0.1 and 5%;
- and
- wherein said activated and ground sodium hexametaphosphate frit particles are embedded in said polymer matrix.
Dependencies are inferred from the claim text.