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Assignee: Wolff Walsrode AG


Location: Walsrode, DE
No. of patents: 105

1      
NumberTitleIssue Date
7259257Process for producing particulate, water-soluble cellulose derivatives using a superheated gas mixture containing steam
The present invention relates to a new, particularly economical process for preparing particulate water-soluble cellulose derivatives. The process involves forming a feed composition of swollen and/or dissolved cellulose derivative, and water. The feed composition i...
08/21/2007
6943247Building material compositions
Described is a building material composition prepared from or having added thereto a particulate material selected from particulate polysaccharides or particulate polysaccharide derivatives. The particulate material of the building material composition is prepared b...
09/13/2005
6939960Cellulose ethers
A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is ≧60%, based ...
09/06/2005
6908649Coextruded, at least 3-layered, biaxially stretched tubular film with inner PA layer
This invention relates to a coextruded biaxially stretched tubular film for the durable and crease-free covering of goods packaged in the liquid or pasty state, in particular foodstuffs such as sausage-meat for boiling or cooking or soft cheese, which are heated dur...
06/21/2005
6891034Process for preparing alkylhydroxyalkyl cellulose
Described is a process of preparing alkylhydroxyalkyl cellulose, e.g., methylhydroxypropyl cellulose (MHPC). The process includes: (a) alkylating cellulose with an aqueous caustic solution containing from 1.5 to 5.5 equivalents of alkali metal hydroxide, e.g., NaOH,...
05/10/2005
6880772Process and apparatus for combined milling and drying
A process of both milling and drying a solvent-moist material (e.g., water-moist methylhydroxyethylcellulose) is described. The process includes, (a) providing a mill-dryer (100) which includes, in series, a heat exchanger (1), a mill (2) and a ...
04/19/2005
6872820Finely divided polysaccharide derivatives
Finely divided polysacharide derivatives are described. The finely divided polysacharide derivatives are prepared by a process comprising: a) forming an aqueous composition comprising a polysaccharide derivative and water, in which the polysaccharide derivative is s...
03/29/2005
6852852Method of producing regioselectively substituted esters of oligo- and polysaccharides
A method of producing a cellueose ether that is predominantly substituted in the C2 position of the anhydroglucose unit of the cellulose is described. The regioselectively substituted saccharide ester produced according to the method of the present invention is sele...
02/08/2005
6797015Method for producing transparent, colored cellulose sleeves
Process for producing dyed, tubular food wrappings from non-woven fabric coated with regenerated cellulose, characterized in that an alkaline dye liquor containing at least one dye which has been previously converted into an alkali-soluble form by chemical reduction...
09/28/2004
6780522Transparent high strength polyamide film
Described is a single or multi-layered film having at least one polyamide layer (I) containing dispersed nanoscale nucleating particles. The smallest components of the dispersed nanoscale nucleating particles in layer (I) have an extension of less than 100 nm in at ...
08/24/2004
6740422High luster, flexible multilayered film with a polyamide outer layer containing nanodispersed filling material and utilization of said film for packaging foodstuffs
Described is a flexible, multilayered film comprising, (i) an outer layer composed substantially of polyamide containing nanodispersed filing material (e.g., in an amount of from 0.1 and 3 wt. %), and (ii) at least one additional polyamide layer. The multilayered fi...
05/25/2004
6732493Method for packaging foods
A method for packaging food, which comprises packaging food in an at least eight-layer co-extruded, adhesive free and EVOH-free thermoformable film comprised of polyamide, polyolefin, and/or copolymers based on olefins, wherein the film has a first outer layer compr...
05/11/2004
6645609Peelable, sealable polyolefinic multilayered film and its use as a packaging film
Described is a stretched multilayered film comprising: (a) a polyolefin layer; and (b) at least one peelable outer layer. Each peelable outer layer (b) independently is 0.5 to 5 μm thick, comprises a copolymer of vinyl acetate and ethylene, and has a vin...
11/11/2003
6627324Tough, dimensionally-stable transparent film having a copolyamide layer containing solid nanoscale filling materials with nucleating effect and its use for packaging foodstuffs
Described is a film having at least a single layer and at least one copolyamide layer (I) containing dispersed nanoscale nucleating particles. Crystalline structures extending from the dispersed particle surfaces are formed after the layer (I) is cooled f...
09/30/2003
6613407Multilayered, coextruded, heat-stable deep-drawing foil for packaging
A thermoformable, multilayer, co-extruded adhesive-free and EVOH free film having an outer layer of polyamide and a second outer layer polyolefin, olefin copolymer or a mixture thereof, with inner polyamide and polyolefin or olefin copolymer layers, and l...
09/02/2003
6613394Method of surface treating or coating of materials
Described is a method of treating or coating homogeneously at least a portion of the surface of a material selected from metallic materials having a thickness of less than 100 μm and/or polymeric materials. The method of the present invention comprises e...
09/02/2003
6582828Deep-drawn slidable foil based on polyolefins and polyamide
A thermoformable, puncture-resistant multi-layered film with surface slip, prepared by coextrusion and built up from polyolefin-based, polyamide-based and adhesion promoting polymer layers and its use for packaging sharp-edged goods, in particular foodstu...
06/24/2003
6576348Multilayer film with lamination and heat-sealable sides, and having antifogging properties
A multilayer film having a lamination side and a heat-sealable side is described. The multilayer film comprises, a) an inner layer (i) ethylene/vinyl alcohol copolymer; b) a coupling agent layer (ii) and a separate coupling agent layer (ii'), said inner l...
06/10/2003
6569538Symmetrically structured, multi-layered film
A thermoformable, multi-layered, symmetric, coextruded film having no tendency to roll up, is described. The coextruded film contains layers of polyamide and polyolefin or copolymers based on olefins....
05/27/2003
6559300Water-soluble biodegradable hydroxyalkyl cellulose-2-hydroxycarboxylic acid esters which can flocculate
A water-soluble, biodegradable hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester is disclosed. The hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester has: (i) a molecular degree of substitution of the hydroxyalkyl group of less than 1.5 (MShyd...
05/06/2003
6558719Foodstuffs skin based on cellulose with reinforced adhesion to minced meat and a process for its preparation
A foodstuffs skin based on cellulose with a water vapor impermeable layer on the outer surface and a coating consisting of at least two components on the inner surface is disclosed. The coating which reinforces adhesion to minced meat contains a cross-lin...
05/06/2003
6555242Longitudinally stretched, vacuum vapor coated packaging films
A longitudinally stretched multilayered film having good barrier properties is described. The film is prepared by a process comprising (a) preparing by coextrusion a laminate structured of, in sequence, a first polyamide layer, an EVOH layer, and a second...
04/29/2003
6541087Multilayer, biaxially stretched, high-barrier plastic skin
A multilayerd, biaxially stretched tubular film having the following sequence of layers, |A|B|C|D|E|F.vertlin e.G|, is described. Inner layer A contains at least one member selected from the group consisting of aliphatic (co)polyamide and partial...
04/01/2003
6534171Gas-tight laminating film and packaging material produced therefrom
Described is a heat sealable, multi-layer laminating film composed of at least six layers of thermoplastic polymers. The multi-layer laminating film has an inner layer of ethylene/vinyl alcohol copolymer (EVOH). Also described are packaging materials cont...
03/18/2003
6524712Flexible multilayer film
A multilayer film is described which has at least one first layer (1) of thermoplastic polyurethane, at least one second layer (2) of thermoplastic elastomer, and optionally a third layer (3) of thermoplastic polyurethane. The ratio of the water vapor per...
02/25/2003
6517920Multilayer, coextruded, biaxially stretched high-barrier plastic casing
A multilayered, coextruded tubular biaxially stretched casing, having oxygen and water vapor barrier properties plus reduced adhesion to contents, e.g., foodstuffs, contained within the casing, is disclosed. The tubular casing has five layers in the order...
02/11/2003
6509461Process for producing particulate, water-soluble cellulose derivatives
The present invention relates to a new, particularly economical process for producing particulate water-soluble cellulose derivatives. The process involves forming a feed composition of swollen and/or dissolved cellulose derivative, and water. The feed co...
01/21/2003
6509396Coating agent emulsion and its use in lacquers
An oil-in-water coating agent is described. The coating agent emulsion is prepared from a composition comprising: a) 5.0 to 50 wt. % of cellulose substance; b) 5.0 to 50 wt. % of at least one hydroxyl group-containing lacquer resin; c) 2.0 to 25 wt. % of ...
01/21/2003
6503617Multilayer film laminates
Described is a multilayer film laminate having at least three layers, and gas barrier properties. The multilayer film laminate comprises sequentially: (I) at least two first layers, each of the first layers (I) having, on one side only, a vapor deposited ...
01/07/2003
6489468Regioselectively substituted esters of oligo- and polysaccharides and a method of producing them
A regioselectively substituted member selected from the group consisting of oligo-saccharide ester and polysaccharide ester is disclosed. The ester has a partial average degree of substitution AS at the C2 position of its anhydroglucose unit of at least 9...
12/03/2002
6482940Cellulose ethers and method for producing the same
A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is ࣙ...
11/19/2002
6455618Thermoplastic elastomer molding compositions with improved processability
Described is a thermoplastic molding composition comprising: a) 0.05 to 1.5 wt. %, with respect to the entire molding composition, of a fatty acid amide ester wax; b) 0.5 to 10 wt. %, with respect to the entire molding composition, of a silica selected fr...
09/24/2002
6419995Process for the surface activation of materials
Described is a process for the homogeneous surface activation of a material in web form, by means of plasma-treatment. The material in web form is selected from metallic materials in web form having a thickness of less than 100 μm, polymeric materials in...
07/16/2002
6407151Aqueous coating agent and its use in lacquers
A cellulose substance-containing lacquer emulsion prepared from a) 5-50 wt. % of cellulose substance b) 5-50 wt. % of one or more hydroxyl group-containing lacquer resins c) 0.1-10 wt. % of polyisocyanates with more than one free isocyanate group d) 0.5-30 wt. % of plas...
06/18/2002
6403787Thermoplastic material consisting of aliphatic carbamic acid derivatives of polysaccharides and low-molecular urea derivatives as well as a process for their preparation and use of the same
The present invention relates to evenly substituted polysaccharide derivatives having the general structure: polysaccharide--O--R wherein polysaccharide--O represents a substituted or unsubstituted polysaccharide unit and R is a substituent of a polysaccharide...
06/11/2002
6364363Film with a security feature, a process for the production thereof and the use thereof as packaging material
An optionally laminated film of plastics is described, characterised in that the film is printed on one side with a security ink. A process for the production of such a film and the use thereof as a packaging material are also described....
04/02/2002
6362330Polysaccharide-based thermoplastic material, process for preparing the same and method of use thereof
The present invention relates to novel thermoplastic materials based on polysaccharide ethers which are simultaneously substituted by carboxylic acid ester groups and carbamate groups, together with mixtures of such derivatives with low molecular weight a...
03/26/2002
6346321Film with protective feature, a method of producing it and also its use as packaging material
A plastic film comprising a plastic resin having imprinted on one of its surfaces a microtyped marking is disclosed. The film, optionally in the form of a laminate with a film of polymeric material, paper or metal foil is useful as packaging material....
02/12/2002
6331355Rollable, single-coated hot melt adhesive film with no interlayer
The invention provides a monolayered thermoplastic hot-melt adhesive film without a separating layer which can be rolled up and unrolled without the additional use of a separating layer and in which the polymer matrix of copolyamides and/or copolyesters c...
12/18/2001
6274653Bonding agent preparations for paints, the production and use thereof
A plasticized composition comprising 40 to 82 percent cellulose nitrate, having nitrogen content of less than 12.6% relative to the weight of said cellulose nitrate, and 18 to 60 percent formylated polyurethane, said percent, both occurrences, being relat...
08/14/2001
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