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公开(公告)号：US20180346813A1
公开(公告)日：2018-12-06
申请号：US15779131
申请日：2016-11-25
Applicant: STORA ENSO OYJ
Inventor： Kaj Backfolk , Elina Skerfe , Isto Heiskanen
Abstract: The invention relates to a ground cover in the form of a mulch, comprising a paper substrate originating from fibre-bearing pulp, preferably emanating from lignocellulosic material, which has been web-formed or sheet-formed. Paper based mulches face problems with biodegradability and microbial attacks, mechanical strength and cost. The solution according to the invention is that the fibres have been coated with one or more minerals, e.g., calcium carbonate, and the mulch comprises one or more functional agents, e.g., a colorant. Further, the mineral coated onto or into the fibres predominantly show up when precipitated in the form of one or more metal carbonates.
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公开(公告)号：US20200008372A1
公开(公告)日：2020-01-09
申请号：US16489817
申请日：2018-02-27
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen , Elina Skerfe
Abstract: The present invention is directed to a culture medium comprising a soilless substrate, microfibrillated cellulose and a hydrophilic or amphiphilic polymer. The present invention is particularly useful in soilless agriculture, such as for horticultural/agricultural use that is based on a soilless substrate such as mineral or glass wool. These types of culture media are often used in greenhouses but may also be used for outdoor horticulture or agriculture.
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公开(公告)号：US11753771B2
公开(公告)日：2023-09-12
申请号：US15562943
申请日：2016-03-31
Applicant: Stora Enso OYJ
Inventor： Elina Skerfe , Erik Mattsson
IPC: D21H17/67 , D21H17/20 , D21H17/70 , C01F11/18 , D21C5/02 , D21J1/00 , D21H17/69 , C09C3/04 , C09C1/02
CPC classification number: D21H17/675 , C01F11/181 , C09C1/021 , C09C3/04 , D21C5/02 , D21H17/20 , D21H17/67 , D21H17/69 , D21H17/70 , D21J1/00 , C01P2002/80 , C01P2006/60 , Y02W30/64
Abstract: The invention provides a method of producing a filler comprising calcium carbonate (PCC), preferably to be used in paper or paper board production or in fibre based composites. The method of the invention comprises the steps of; —providing fly ash generated in paper or paper board production; —fractionating said fly ash in at least one step, whereby a coarser fraction is separated from a finer fraction; —forming a suspension of said coarser fraction; —adding carbon dioxide to said suspension to form precipitated calcium carbonate. The method of the invention avoids problems with high amounts of arsenic and heavy metals in the production of filler comprising PCC, when using ash generated in paper or paper board production as a raw material. It has been shown that harmful elements, such as arsenic and heavy metals, are primarily accumulated in the finer fractions of the fly ash. Thus, by using the coarser fraction in the step of carbonation, the amount of arsenic and heavy metals in the final product is reduced.
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公开(公告)号：US20180112360A1
公开(公告)日：2018-04-26
申请号：US15562943
申请日：2016-03-31
Applicant: Stora Enso OYJ
Inventor： Elina Skerfe , Erik Mattsson
CPC classification number: D21H17/675 , C01F11/181 , C01P2002/80 , C01P2006/60 , C09C1/021 , C09C3/04 , D21C5/02 , D21H17/20 , D21H17/67 , D21H17/69 , D21H17/70 , D21J1/00 , Y02W30/648
Abstract: The invention provides a method of producing a filler comprising calcium carbonate (PCC), preferably to be used in paper or paper board production or in fibre based composites. The method of the invention comprises the steps of; —providing fly ash generated in paper or paper board production; —fractionating said fly ash in at least one step, whereby a coarser fraction is separated from a finer fraction; —forming a suspension of said coarser fraction; —adding carbon dioxide to said suspension to form precipitated calcium carbonate. The method of the invention avoids problems with high amounts of arsenic and heavy metals in the production of filler comprising PCC, when using ash generated in paper or paper board production as a raw material. It has been shown that harmful elements, such as arsenic and heavy metals, are primarily accumulated in the finer fractions of the fly ash. Thus, by using the coarser fraction in the step of carbonation, the amount of arsenic and heavy metals in the final product is reduced.
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