公开(公告)号：WO2020109401A1

公开(公告)日：2020-06-04

申请号：PCT/EP2019/082769

申请日：2019-11-27

Applicant: BILLERUDKORSNÄS AB

Inventor： NADERI, Ali ,  LARSSON, Johan

IPC: C08L27/12 ,  C08J5/00

Abstract: There is provided a method for the production of a packaging material comprising a substrate and a gas barrier layer based on polyvinyl alcohol (PVOH), said method comprising the steps of -applying a coating composition of said PVOH dissolved in a first solvent onto said substrate to form a coating -subjecting the coating to a first drying step to form a dried PVOH-based coating on said substrate, -contacting the dried PVOH-based coating with a crosslinking solution comprising a crosslinking agent in a second solvent, to effect crosslinking of the PVOH-based coating, and -subsequent to the contact with the crosslinking solution, subjecting the PVOH- based coating to a second drying step, forming the PVOH-based barrier layer on said substrate, with the proviso that if the crosslinking solution comprises PVOH, the amount of PVOH added by the crosslinking solution is less than 20% (by weight), such as less than 10% (by weight), of the amount of PVOH added by the coating composition.

公开(公告)号：WO2023046985A1

公开(公告)日：2023-03-30

申请号：PCT/EP2022/076813

申请日：2022-09-27

Applicant: BILLERUDKORSNÄS AB

Inventor： GILLGREN, Thomas ,  LARSSON, Johan ,  PROSPER, Wouter

IPC: D21H19/58 ,  B65D65/42 ,  D21H19/82 ,  D21H27/10

Abstract: The present disclosure provides a coated paper product comprising: - a paper substrate comprising a first and second side; - a first coating layer on the first side of the paper substrate, wherein the first coating layer comprises ethylene-acrylic acid (EAA) or vinyl acetate acrylate copolymer (VAcA) or styrene-acrylate (SA) or acrylic latex; and - a second coating layer on the first coating layer, wherein the second coating layer comprises EAA and talc, and wherein the dry weight ratio of EAA to talc in the second coating layer is between 100:5 and 100:70, - wherein the coat weight of the first coating layer is at least 4 g/m², and - wherein the coat weight of the second coating layer is at least 3 g/m².

公开(公告)号：WO2022064048A1

公开(公告)日：2022-03-31

申请号：PCT/EP2021/076532

申请日：2021-09-27

Applicant: BILLERUDKORSNÄS AB

Inventor： GILLGREN, Thomas ,  LARSSON, Johan

IPC: D21H19/80 ,  B32B29/00 ,  B65D65/02 ,  B65D75/00 ,  D21H19/82 ,  D21H21/50 ,  D21H21/52 ,  D21H25/04 ,  D21H27/10

Abstract: The present disclosure provides a coated paper product for use in a flow wrapping process, wherein: - said coated paper product comprises a paper substrate; - said paper substrate is a machine-glazed (MG) kraft paper having a glazed side and a non-glazed side; - said non-glazed side is coated with a precoating layer and a barrier coating layer; - said precoating layer comprises a polymeric binder and a pigment; and - the contact angle measured according to TAPPI T 558 between water and a surface formed by the barrier coating layer is less than 90° at the 1.0 s checkpoint.

公开(公告)号：WO2021094440A1

公开(公告)日：2021-05-20

申请号：PCT/EP2020/081884

申请日：2020-11-12

Applicant: BILLERUDKORSNÄS AB

Inventor： NADERI, Ali ,  LARSSON, Johan

IPC: D21H11/18 ,  D21H11/20 ,  D21H19/12 ,  D21H23/24 ,  D21H23/26 ,  D21H17/63 ,  D21H17/66 ,  D21H17/06 ,  D21H17/14 ,  D21H19/64

Abstract: There is provided a method for producing a crosslinked film comprising microfibrillated cellulose (MFC), wherein the method comprises the steps of: a) applying an aqueous composition comprising a crosslinking agent to a film formed from an aqueous suspension comprising MFC, which film has a moisture content of less than 15 %, such as less than 10 %, provided that if the crosslinking agent is a metal ion, the metal ion is a divalent metal ion having a concentration in the aqueous composition of below 50 mM and the MFC has a charge density measured according to SCAN-CM 65:02 of 500-1800 µeq/g; and b) drying the film from step a) such that at least 50% of the water absorbed by the film following the application of step a) is removed within five minutes from the start of step a).

公开(公告)号：WO2021094439A1

公开(公告)日：2021-05-20

申请号：PCT/EP2020/081882

申请日：2020-11-12

Applicant: BILLERUDKORSNÄS AB

Inventor： NADERI, Ali ,  LARSSON, Johan

IPC: D21H11/18 ,  C08B11/12 ,  C08L1/28 ,  D21H11/20 ,  D21H27/10 ,  D21C9/00 ,  D21H17/64 ,  D21H25/02

Abstract: There is provided a method of producing a sheet having a density of 0.6-1.3 g/cm3 measured according to ISO 534:2011, the sheet comprising chemically modified cellulose fibres, wherein the method comprises: a. providing chemically modified cellulose fibres, wherein charge density measured according to SCAN-CM 65:02 of the chemically modified cellulose fibres is 1200-2400 µeq/g; b. forming a fibre web by dewatering a slurry comprising the chemically modified cellulose fibres on a forming wire; and c. drying the fibre web to obtain the sheet, with the proviso that no carboxymethyl cellulose (CMC) is added to the chemically modified cellulose fibres during or prior to step b.

公开(公告)号：WO2020109179A1

公开(公告)日：2020-06-04

申请号：PCT/EP2019/082295

申请日：2019-11-22

Applicant: BILLERUDKORSNÄS AB

Inventor： LARSSON, Johan

IPC: C09D7/00 ,  C09D183/00 ,  D21H17/00 ,  D21H19/00 ,  D21H21/00 ,  D21H23/00 ,  D21H25/00

Abstract: There is provided a method of coating a paper substrate using a multi-slot curtain coater, wherein a water-based composition comprising a polymer is fed through a first slot and a water-based composition comprising silicone is fed through a second slot to form a curtain of at least two layers that coats the paper with a support layer and a silicone layer on top of the support layer and wherein: -the flow rate (1/min*m) is at least five times higher for the polymer composition than for the silicone composition; -the flow rate of the curtain is at least 6.0 l/min*m, such as 6.0-50 l/min*m, such as 6.0-15 1/min*m; -the coating speed is 500-2000 m/min, such as 500-1500 m/min; -the viscosity is higher for polymer composition than for the silicone composition, wherein the viscosity is measured according to ISO 3219:1993 at 25 °C using a shear rate of 25 s -1 ; -the solids content of the polymer composition is 8.0-40 % and the solids content of the silicone composition is 8.0-40 %; and -the solids content of the polymer composition is higher than or equal to the solids content of the silicone composition. A certain product that can be produced by the method is also provided.

公开(公告)号：WO2018189283A1

公开(公告)日：2018-10-18

申请号：PCT/EP2018/059375

申请日：2018-04-12

Applicant: BILLERUDKORSNÄS AB

Inventor： LARSSON, Johan

IPC: D21H19/38 ,  D21H19/40 ,  D21H19/58

Abstract: There is provided a coated paperboard comprising a base board having a top side provided with a pigment coating, which pigment coating comprises a pigment mixture, a binder and a rheology modifier, wherein: the pigment mixture comprises, by dry weight, 0-17 % of clay, 60-90 % of a first CaCO 3 pigment and 0-30 % of a second CaCO 3 pigment, provided that the amount of clay and second CaCO 3 pigment combined is at least 10 %; the d 50 of the first CaCO 3 pigment is 0.60-0.80 μιτι and the d 98 of the first CaCO 3 pigment is at least 2.8 μιτι; the d 50 of the second CaCO 3 pigment is 0.63 ± 0.10 μιτι and the d 75 of the second CaCO 3 pigment is less than 1.2 μιτι; the binder comprises a styrene-butadiene copolymer or a styrene-acrylate copolymer; and the dry weight ratio of pigment to binder in the pigment coating is from 100:16 to 100:20.