Title:
MODIFIED POLYVINYL ALCOHOL AND A WATER VAPOR- AND SMOKE -PERMEABLE SYNTHETIC CASING FOR FOOD PRODUCTS, COMPRISING IT
Document Type and Number:
WIPO Patent Application WO/2012/134347
Kind Code:
A3
Abstract:
This invention relates to a method for production modified polyvinyl alcohol and to a water vapor- and smoke-permeable synthetic food casing, with improved optical properties, containing such modified polyvinyl alcohol. Polyvinyl alcohol powder with the degree of hydrolysis of 70-98 mole % and 3-30 cPs viscosity of 4% aqueous solution is loaded while stirring into a mixer for dry and highly viscous materials and 0.05-3.0% of concentrated aqueous solution of sodium peroxide and/or potassium peroxide and/or calcium peroxide and/or hydrogen peroxide in neat hydrogen peroxide equivalent are added. The dry by touch reaction mixture is stirred at 45-100°C until virtually complete consumption of the peroxide compound and formation of modified polyvinyl alcohol powder. This polyvinyl alcohol can be converted to a form convenient for extrusion, by addition of virtually non-volatile plasticizers and subsequent molding operations. Another object of the present invention is a single- or multilayer water vapor- and smoke- permeable synthetic sausage casing with improved optical properties, comprising in at least one of its layers such modified PVA and polyamide material. The layer comprising such modified PVA is extruded from a blend containing from 10 to 95.5% of polyamide material, and from 4.5 to 50% of modified PVA obtained in one or another form according to the present invention, and also from 0 to 40% of additives.
Inventors:
BORODAEV SERGEI VASILIEVICH (RU)
GOLYANSKIY BORIS VLADIMIROVICH (RU)
RYZENKO SERGEI PETROVICH (RU)
GOLYANSKIY BORIS VLADIMIROVICH (RU)
RYZENKO SERGEI PETROVICH (RU)
Application Number:
PCT/RU2012/000217
Publication Date:
November 08, 2012
Filing Date:
March 27, 2012
Export Citation:
Assignee:
OBSCHESTVO S OGRANICHENNOI OTVETSTVENNOSTYU PROIZV (RU)
BORODAEV SERGEI VASILIEVICH (RU)
GOLYANSKIY BORIS VLADIMIROVICH (RU)
RYZENKO SERGEI PETROVICH (RU)
BORODAEV SERGEI VASILIEVICH (RU)
GOLYANSKIY BORIS VLADIMIROVICH (RU)
RYZENKO SERGEI PETROVICH (RU)
International Classes:
A22C13/00; C08F8/00; C08F16/06
Foreign References:
| EP1188775A2 | 2002-03-20 | |||
| EP0587114A2 | 1994-03-16 | |||
| EP0692494A1 | 1996-01-17 | |||
| EP0889068A2 | 1999-01-07 |
Attorney, Agent or Firm:
FALEEVA, Liubov Nikolaevna (72Lenina,Aksayski rayo, Rostovskaya obl. 3, RU)
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