Patents by Inventor Jurkka Kuusipalo
Jurkka Kuusipalo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220002948Abstract: The present invention relates to a paper or paperboard comprising a polymeric coating, said polymeric coating comprising: a first coating layer attached to the paper or paperboard surface, said first coating layer comprising a blend of: a high density polyethylene (HDPE), medium density polyethylene (MDPE) or linear low density polyethylene (LLDPE), or a mixture thereof, and a low density polyethylene (LDPE); and a second coating layer attached to the first coating layer, said second coating layer consisting essentially of a low density polyethylene (LDPE); wherein the first and second coating layers have a combined grammage of less than 12 g/m2. The present invention relates to a method for manufacturing a polyethylene (PE) coated paper or paperboard substrate.Type: ApplicationFiled: October 1, 2019Publication date: January 6, 2022Applicant: Stora Enso OYJInventors: Ville Ribu, Kimmo Nevalainen, Juuso Toriseva, Esa Suokas, Jurkka Kuusipalo
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Patent number: 10857753Abstract: A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.Type: GrantFiled: February 6, 2018Date of Patent: December 8, 2020Assignee: STORA ENSO OYJInventors: Tapani Penttinen, Kimmo Nevalainen, Jurkka Kuusipalo, Tapio Koskinen, Sami Kotkamo
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Publication number: 20200122380Abstract: The present invention relates to a process for extrusion coating of a fiber-based substrate, wherein a twin-screw extruder is used on-line in the extrusion coating process.Type: ApplicationFiled: May 9, 2018Publication date: April 23, 2020Applicant: Stora Enso OYJInventors: Jari RÄSÄNEN, Kimmo NEVALAINEN, Ville RIBU, Esa SUOKAS, Jurkka KUUSIPALO
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Patent number: 10493700Abstract: The invention relates to methods for lowering the melt viscosity and thereby improving heat-sealability of a polyester. The invention also relates to a method for manufacturing a heat-sealed container or package from fibrous-based, polyester-coated packaging material, and a method for heat-sealing polyester. The solution according to the invention is subjecting polyester to electron beam (EB) radiation. The lowered melt viscosity allows a lower heat-sealing temperature, and permits sealing of polyester to an uncoated fibrous surface. The preferred polyester for the invention is polylactide, as such or as blended with another polyester.Type: GrantFiled: January 22, 2015Date of Patent: December 3, 2019Assignee: Stora Enso OYJInventors: Kimmo Nevalainen, Ville Ribu, Jari Räsänen, Outi Kylliainen, Ari Rosling, Mohammad Khajeheian, Jurkka Kuusipalo, Sami Kotkamo, Mikko Tuominen
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Patent number: 10214316Abstract: A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein a multilayer coating coextruded onto a fibrous substrate the multilayer coating comprising innermost and outermost layers of a blend comprising 20-95 wt-% of a higher melt index polylactide and 5-80 wt-% of another biodegradable polymer such as polybutylene succinate, and a middle layer containing a lower melt index polylactide alone. The goal is to increase machine speed in coextrusion while maintaining good adhesiveness to the substrate and good heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.Type: GrantFiled: October 23, 2013Date of Patent: February 26, 2019Assignee: STORA ENSO OYJInventors: Kimmo Nevalainen, Ville Ribu, Jurkka Kuusipalo, Sami Kotkamo
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Publication number: 20180154603Abstract: A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.Type: ApplicationFiled: February 6, 2018Publication date: June 7, 2018Inventors: Tapani PENTTINEN, Kimmo NEVALAINEN, Jurkka KUUSIPALO, Tapio KOSKINEN, Sami KOTKAMO
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Patent number: 9937681Abstract: A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.Type: GrantFiled: April 27, 2011Date of Patent: April 10, 2018Assignee: STORA ENSO OYJInventors: Tapani Penttinen, Kimmo Nevalainen, Jurkka Kuusipalo, Tapio Koskinen, Sami Kotkamo
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Publication number: 20170008226Abstract: The invention relates to methods for lowering the melt viscosity and thereby improving heat-sealability of a polyester. The invention also relates to a method for manufacturing a heat-sealed container or package from fibrous- based, polyester-coated packaging material, and a method for heat-sealing polyester. The solution according to the invention is subjecting polyester to electron beam (EB) radiation. The lowered melt viscosity allows a lower heat-sealing temperature, and permits sealing of polyester to an uncoated fibrous surface. The preferred polyester for the invention is polylactide, as such or as blended with another polyester.Type: ApplicationFiled: January 22, 2015Publication date: January 12, 2017Inventors: Kimmo Nevalainen, Ville Ribu, Jari Räsänen, Outi Kylliainen, Ari Rosling, Mohammad Khajeheian, Jurkka Kuusipalo, Sami Kotkamo, Mikko Touminen
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Patent number: 9181010Abstract: A heat-sealable biodegradable packaging material, its manufacturing method and a product package formed thereof, where the packaging material comprises a fiber substrate, an inner polymeric coating layer against the fiber substrate, which contains polylactide and a biodegradable polyester that is blended therewith to improve the adhesion between the inner coating layer and the fiber substrate, and an outer coating layer that constitutes the outer surface of the material and contains polylactide and a biodegradable polyester that is blended therewith to improve the heat sealing ability of the layer, the portion of polylactide in the inner layer present in an amount greater than that in the outer layer. The inner and/or outer coating layers can further have blended therewith a small amount of acrylic copolymer that improves the adhesion and/or heat sealing ability. The coating layers can be introduced onto the fiber substrate by extrusion or coextrusion.Type: GrantFiled: March 11, 2011Date of Patent: November 10, 2015Assignee: Stora Enso OYJInventors: Tapani Penttinen, Kimmo Nevalainen, Jurkka Kuusipalo, Tapio Koskinen, Sami Kotkamo
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Publication number: 20150284133Abstract: A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein a multilayer coating coextruded onto a fibrous substrate the multilayer coating comprising innermost and outermost layers of a blend comprising 20-95 wt-% of a higher melt index polylactide and 5-80 wt-% of another biodegradable polymer such as polybutylene succinate, and a middle layer containing a lower melt index polylactide alone. The goal is to increase machine speed in coextrusion while maintaining good adhesiveness to the substrate and good heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.Type: ApplicationFiled: October 23, 2013Publication date: October 8, 2015Inventors: Kimmo Nevalainen, Ville Ribu, Jurkka Kuusipalo, Sami Kotkamo
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Patent number: 8592001Abstract: The invention relates to a polymer-coated Polymer-coated heat-sealable packaging material, heat-sterilized package formed from the material, and use of the packaging material. The material comprises a fiber base 4 (e.g., packaging board made of bleached pulp) with polymer heat-seal layers 1,9 located on both sides thereof. The package comprises, outside the fiber base, first polymer coating layer 2, which contains white pigment for covering the fiber base from sight, and second coating layer 8, which contains light-absorbing pigment. A coating layer pigmented grey inside the fiber base may provide a light shield for the packaged product. Absorbent black pigment may be located outside the fiber base underneath the white layer to stabilize the brightness of the material. A heat-sterilized package is made by providing the packaging material, forming a package containing, e.g., food, and heat-sterilizing the package in an autoclave. Yellowing of the fiber-based material is avoided by means of a white pigment.Type: GrantFiled: January 15, 2009Date of Patent: November 26, 2013Assignee: Stora Enso OyjInventors: Tapani Penttinen, Kimmo Nevalainen, Erkki Laiho, Markku Sainio, Jurkka Kuusipalo, Antti Savolainen, Esa Koreasalo, Isto Heiskanen, Tommi Lehikoinen
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Publication number: 20130137562Abstract: A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.Type: ApplicationFiled: April 27, 2011Publication date: May 30, 2013Applicant: STORA ENSO OYJInventors: Tapani Penttinen, Kimmo Nevalainen, Jurkka Kuusipalo, Tapio Koskinen, Sami Kotkamo
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Publication number: 20130071677Abstract: A heat-sealable biodegradable packaging material, its manufacturing method and a product package formed thereof, where the packaging material comprises a fiber substrate, an inner polymeric coating layer against the fiber substrate, which contains polylactide and a biodegradable polyester that is blended therewith to improve the adhesion between the inner coating layer and the fiber substrate, and an outer coating layer that constitutes the outer surface of the material and contains polylactide and a biodegradable polyester that is blended therewith to improve the heat sealing ability of the layer, the portion of polylactide in the inner layer than that in the outer layer. The inner and/or outer coating layers can further have blended therewith a small amount of acrylic copolymer that improves the adhesion and/or heat sealing ability. The coating layers can be introduced onto the fiber substrate by extrusion or coextrusion.Type: ApplicationFiled: March 11, 2011Publication date: March 21, 2013Applicant: STORA ENSO OYJInventors: Tapani Penttinen, Kimmo Nevalainen, Jurkka Kuusipalo, Tapio Koskinen, Sami Kotkamo
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Patent number: 7989054Abstract: The invention relates to a method for digitally printing a polymer-coated paper or board (1), to a paper or board suitable for the method and to the production of a product package equipped with digital prints. During digital printing, printing ink particles are applied in an electric field to the printing surface formed of a polymer coating at locations corresponding to the print, and the printing ink is adhered to the printing surface by fusion with the aid of infrared radiation. In accordance with the invention, the paper or board (2) to be printed is equipped with an inner coating layer (3) containing electrically chargeable ethene acrylate copolymer, such as ethene methyl acrylate copolymer (EMA), and with a polyolefin-based outer shield layer (4) on top of this, which contains e.g. low-density polyethene (LDPE) and provides mechanical strength, forming the printing surface receiving the printing ink.Type: GrantFiled: March 1, 2010Date of Patent: August 2, 2011Assignee: Stora Enso OYJInventors: Jari Räsänen, Johanna Lahti, Antti Savolainen, Jurkka Kuusipalo
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Publication number: 20100159215Abstract: The invention relates to a method for digitally printing a polymer-coated paper or board (1), to a paper or board suitable for the method and to the production of a product package equipped with digital prints. During digital printing, printing ink particles are applied in an electric field to the printing surface formed of a polymer coating at locations corresponding to the print, and the printing ink is adhered to the printing surface by fusion with the aid of infrared radiation. In accordance with the invention, the paper or board (2) to be printed is equipped with an inner coating layer (3) containing electrically chargeable ethene acrylate copolymer, such as ethene methyl acrylate copolymer (EMA), and with a polyolefin-based outer shield layer (4) on top of this, which contains e.g. low-density polyethene (LDPE) and provides mechanical strength, forming the printing surface receiving the printing ink.Type: ApplicationFiled: March 1, 2010Publication date: June 24, 2010Inventors: Jari RÄSÄNEN, Johanna LAHTI, Antti SAVOLAINEN, Jurkka KUUSIPALO
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Patent number: 7695772Abstract: The invention relates to a method for digitally printing a polymer-coated paper or board (1), to a paper or board suitable for the method and to the production of a product package equipped with digital prints. During digital printing, printing ink particles are applied in an electric field to the printing surface formed of a polymer coating at locations corresponding to the print, and the printing ink is adhered to the printing surface by fusion with the aid of infrared radiation. In accordance with the invention, the paper or board (2) to be printed is equipped with an inner coating layer (3) containing electrically chargeable ethene acrylate copolymer, such as ethene methyl acrylate copolymer (EMA), and with a polyolefin-based outer shield layer (4) on top of this, which contains e.g. low-density polyethene (LDPE) and provides mechanical strength, forming the printing surface receiving the printing ink.Type: GrantFiled: June 16, 2005Date of Patent: April 13, 2010Assignee: Stora Enso OyjInventors: Jari Räsänen, Johanna Lahti, Antti Savolainen, Jurkka Kuusipalo
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Patent number: 7655294Abstract: The invention relates to a digital printing method and a paper or board applicable thereto. In digital printing, the surface of a paper or board is charged electrically, toner particles are brought to the surface in an electric field in accordance with the printing, and the particles are melted fast to the surface with the help of heat for forming the printing. According to the invention, the paper or board (2) is provided with a coating layer (3) containing an electrically chargeable acrylate copolymer of ethylene, which receives the toner that is fused to the coating with the help of infrared radiation. Suitable coating polymers are especially methyl, ethyl and butyl acrylate copolymers of ethylene (EMA, EEA and EBA). Especially in packaging boards, besides the digitally printable layer, the polymer coatings can comprise a water vapor or oxygen barrier layer for protecting the packed product, and a heat-sealable layer on the opposite side of the board for sealing the package.Type: GrantFiled: December 5, 2002Date of Patent: February 2, 2010Assignee: Stora Enso OyjInventors: Johanna Lahti, Tapani Penttinen, Jari Räsänen, Jurkka Kuusipalo, Antti Savolainen
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Patent number: 7651759Abstract: The invention relates to a digital printing method and a paper or board applicable thereto. In digital printing, the surface of a paper or board is charged electrically, toner particles are brought to the surface in an electric field in accordance with the printing, and the particles are melted fast to the surface with the help of heat for forming the printing. According to the invention, the paper or board (2) is provided with a coating layer (3) containing an electrically chargeable acrylate copolymer of ethylene, which receives the toner that is fused to the coating with the help of infra red radiation. Suitable coating polymers are especially methyl, ethyl and butyl acrylate copolymers of ethylene (EMA, EEA and EBA). Especially in packaging boards, besides the digitally printable layer, the polymer coatings can comprise a water vapour or oxygen barrier layer for protecting the packed product, and a heat-sealable layer on the opposite side of the board for sealing the package.Type: GrantFiled: March 15, 2007Date of Patent: January 26, 2010Assignee: Stora Enso OyjInventors: Johanna Lahti, Tapani Penttinen, Jari Räsänen, Jurkka Kuusipalo, Antti Savolainen
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Publication number: 20090186135Abstract: The invention relates to a polymer-coated heat-sealable packaging material, to a heat-sterilised package formed from this and to the use of the packaging material. The material comprises a fibre base 4, which is e.g. a packaging board made of bleached pulp, and polymer heat-seal layers 1, 9 located on both sides of this. In accordance with the invention, the package comprises, outside the fibre base, a polymer coating layer 2, which contains white pigment for covering the fibre base from sight, and a second coating layer 8, which contains light-absorbing pigment. A coating layer pigmented grey inside the fibre base, for instance, provides a light shield for the packaged product. The absorbent black pigment may also be located outside the fibre base underneath a white layer in order to stabilise the brightness of the material. The package may be e.g. a food package heat-sterilised in an autoclave, in which yellowing of the fibre-based material has been avoided by means of a white pigment.Type: ApplicationFiled: January 15, 2009Publication date: July 23, 2009Inventors: Tapani PENTTINEN, Kimmo Nevalainen, Erkki Laiho, Markku Sainio, Jurkka Kuusipalo, Antti Savolainen, Esa Koreasalo, Isto Heiskanen, Tommi Lehikoinen
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Publication number: 20070202308Abstract: The invention relates to a digital printing method and a paper or board applicable thereto. In digital printing, the surface of a paper or board is charged electrically, toner particles are brought to the surface in an electric field in accordance with the printing, and the particles are melted fast to the surface with the help of heat for forming the printing. According to the invention, the paper or board (2) is provided with a coating layer (3) containing an electrically chargeable acrylate copolymer of ethylene, which receives the toner that is fused to the coating with the help of infra red radiation. Suitable coating polymers are especially methyl, ethyl and butyl acrylate copolymers of ethylene (EMA, EEA and EBA). Especially in packaging boards, besides the digitally printable layer, the polymer coatings can comprise a water vapour or oxygen barrier layer for protecting the packed product, and a heat-sealable layer on the opposite side of the board for sealing the package.Type: ApplicationFiled: March 15, 2007Publication date: August 30, 2007Inventors: Johanna Lahti, Tapani Penttinen, Jari Rasanen, Jurkka Kuusipalo, Antti Savolainen