| TOHCELLO CO., LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100310890 | HEAT SEALABLE MULTILAYER FILM - Heat sealable multilayer films can package oil-rich contents to be retort sterilized without separation (delamination) of a cohesive failure heat seal layer due to penetration of oil from the contents and have appropriate heat seal strength and excellent easy openability, and can be opened with stable peel conditions. | 12-09-2010 |
| 20090324836 | METHOD FOR PRODUCING UNSATURATED CARBOXYLIC ACID-MODIFIED VINYL ALCOHOL POLYMER, AND GAS BARRIER FILM OR GAS BARRIER LAMINATE USING THE SAME - The present invention provides an industrially advantageous method for producing an unsaturated carboxylic acid-modified vinyl alcohol polymer, and a gas barrier film obtained by using the same. In summary of the present invention, the present invention is a method for producing a solution containing at least an unsaturated carboxylic acid-modified vinyl alcohol polymer characterized by reacting a vinyl alcohol polymer and an unsaturated carboxylic acid compound in the presence of an acid catalyst soluble in the reaction system or a solid acid catalyst, and a gas barrier film obtained by using the same, and an example of a representative constitution thereof is a method for producing a solution (A) containing an unsaturated carboxylic acid-modified vinyl alcohol polymer (b), the method comprising following two steps of: (1) a reaction step in which the unsaturated carboxylic acid-modified vinyl alcohol polymer (b) is formed by reacting a vinyl alcohol polymer and an unsaturated carboxylic acid compound (a) in the presence of an acid catalyst soluble in the reaction system; and (2) an ion exchange step in which at least the acid catalyst of acidic compounds is removed by an anion exchange resin. | 12-31-2009 |
| 20090318631 | POLYLACTIC ACID STRETCHED FILM - The object of the present invention is to provide a polylactic acid stretched film having biodegradability and excelling in transparency and heat resistance. The main feature is characterized in that a polylactic acid stretched film is composed of a polylactic acid composition containing poly-L-lactic acid and poly-D-lactic acid in which a peak ratio (peak 1/peak 2) of a peak height (peak 1) of a maximum endothermic peak of endothermic peaks within a range of 150 to 200° C. to a peak height (peak 2) of a maximum endothermic peak of endothermic peaks within a range of 205 to 240° C. in DSC measurements is equal to or less than 0.2. | 12-24-2009 |
| 20090269592 | GAS BARRIER FILM, GAS BARRIER LAMINATE AND METHOD FOR MANUFACTURING FILM OR LAMINATE - Disclosed is an excellent gas barrier laminate whose gas-barrier property has little dependency on temperature and which hardly causes fracture even when the laminate is stretched. A gas barrier film comprising a polymer (A) of an unsaturated carboxylic acid compound monovalent metal salt (a), wherein the polymer (A) contains a modified vinyl alcohol polymer (B); a gas barrier laminate comprising a base layer and the gas barrier film formed on at least one surface of the base layer; and a method for production of a gas barrier laminate comprising the steps of: coating a solution of an unsaturated carboxylic acid compound monovalent metal salt (a) having a polymerization degree less than 20 on at least one surface of a base layer, wherein the solution contains a modified vinyl alcohol polymer (B); performing the polymerizaton to form a layer of the polymer (A) of the unsaturated carboxylic acid compound monovalent metal salt (a) containing the modified vinyl alcohol polymer (B). | 10-29-2009 |
| 20090258243 | Heat-Sealable Propylene-Based Polymer Composition, Heat-Sealable Film, and Uses Thereof - The heat-sealable propylene-based polymer composition of the present invention comprises a propylene polymer composition (A) comprising a propylene polymer component (a1) and a propylene/ethylene random copolymer component (a2) having a propylene unit content of 63 to 77% by mol and an ethylene unit content of 23 to 37% by mol, an ethylene/(α-olefin random copolymer (B), and a soft propylene polymer (C) which has an ethylene content of 0 to 30% by mol and an α-olefin content of 0 to 30% by mol and whose melting point, as measured by a differential scanning calorimeter (DSC), is not higher than 100° C. or is not observed; and this heat-sealable propylene-based polymer composition contains the propylene polymer composition (A) in an amount of 50 to 90% by mass, the ethylene/α-olefin random copolymer (B) in an amount of 3 to 25% by mass and the soft propylene polymer (C) in an amount of 0.5 to 40% by mass ((A)+(B)+(C)=100% by mass). The present invention also provides a heat-sealable film using the composition and a packaging bag comprising the film. The heat-sealable film of the present invention has high heat-seal strength, is little decreased in heat-seal strength even after heat treatment and is excellent in blocking resistance, rigidity and low-temperature impact resistance. | 10-15-2009 |
| 20090246544 | MOLDINGS COMPRISING A POLYLACTIC ACID COMPOSITION - An object of the present invention is to provide a polylactic acid composition having specific thermal characteristics and gas barrier properties, and to obtain a molding comprising a polylactic acid composition of PLLA and PDLA capable of forming a polylactic acid stretched film or other molding having superior surface smoothness, transparency, heat resistance and toughness, and the constitution thereof is characterized by being a molding comprising a polylactic acid composition in which the peak in DSC measurement during cooling (at a rate of 10° C./min) after allowing to remain at 250° C. for 10 minutes is 30 mJ/mg or more, and preferably comprising a polylactic acid composition such that, in measurement during the DSC 2nd heating (cooling at a rate of 10° C./min after allowing to remain at 250° C. for 10 minutes followed by reheating from 0° C. at a rate of 10° C./min), the peak ratio (peak 1/peak 2) of the peak when Tm is 150 to 180° C. (peak 1) to the peak when Tm is 200 to 240° C. (peak 2) is 0.5 or less; and a molding comprising a composition in which an inorganic filler is incorporated in the composition described above. | 10-01-2009 |
| 20090098364 | Biaxially Oriented Laminated Polypropylene Film and Uses Thereof - A biaxially oriented laminated polypropylene film comprising a biaxially oriented polypropylene film substrate layer (B) made from a propylene-based polymer composition (A) in which an inorganic compound powder (a2) has been added to a propylene-based polymer (a1), the biaxially oriented polypropylene film substrate layer (B) has a front surface layer and a back surface layer on its both sides, both layers are made from the propylene-based polymer (a1), wherein the surface roughness (three-dimensional center-line roughness SRa) of the front and the back surface layers is less than 0.08 μm and the gloss value (at an incidence angle of 60 degrees) is 114% or greater, and the total light transmittance of the laminated polypropylene film is 20% or less and the density is in the range of 0.40 to 0.65 g/cm | 04-16-2009 |
| 20090035585 | POLYLACTIC ACID COMPOSITION AND MOLDING COMPRISING THE COMPOSITION - The invention aims at providing a polylactic acid composition having specific thermal characteristics and gas barrier properties and at obtaining a polylactic acid composition comprising PLLA and PDLA which composition can form moldings (such as stretched film) excellent in surface smoothness, transparency, heat resistance, and toughness. Specifically, a polylactic acid composition characterized by exhibiting a peak of 30 mJ/mg or above in DSC as determined by cooling at a rate of 10° C./min after the lapse of 10 min at 250° C., preferably a polylactic acid composition characterized by exhibiting a peak ( | 02-05-2009 |
| 20080262179 | Gas-Barrier Film, Gas-Barrier Layered Body, And Process For Producing Same - The gas-barrier film of the present invention basically comprises a polymer of a polyvalent metal salt of an unsaturated carboxylic acid compound which gives an infrared absorption spectrum in which the ratio of the absorbance A | 10-23-2008 |
