公开(公告)号：US11851821B2

公开(公告)日：2023-12-26

申请号：US17942716

申请日：2022-09-12

Applicant: Cascades Sonoco Inc.

Inventor： Yvon Mongrain ,  Etienne Levert ,  Simon Provencher

IPC: D21H19/82 ,  C09D5/26 ,  D21H19/12 ,  D21H27/10 ,  D21H19/84 ,  D21H19/20 ,  D21H19/56 ,  D21H19/22

CPC classification number: D21H19/824 ,  C09D5/26 ,  D21H19/12 ,  D21H19/20 ,  D21H19/22 ,  D21H19/56 ,  D21H19/82 ,  D21H19/84 ,  D21H27/10

Abstract: A heat sealable paper-based substrate is provided with at least the first surface covered with at least one primer coat and at least one topcoat over the primer coat, wherein: the primer coat is formed from a substantially wax-free aqueous dispersion of at least one polymer or copolymer, has a coefficient of thermal expansion equal to or less than about 200 μm/(m·° C.) for at least one operating temperature, and has a complex viscosity of at least about 80000 poises at a heat seal temperature; the topcoat has a different composition than the primer coat and is formed from an aqueous dispersion of at least one thermoplastic polymer or copolymer, and has a complex viscosity of at least about 3000 poises at a heat seal temperature. The heat sealable paper-based substrate can be used to make articles to contain goods such as cold or hot beverages or food products.

公开(公告)号：US20210017714A1

公开(公告)日：2021-01-21

申请号：US17060811

申请日：2020-10-01

Applicant: Cascades Sonoco Inc.

Inventor： Yvon MONGRAIN

IPC: D21H19/72 ,  D21H21/16 ,  D21H19/10 ,  D21H19/82 ,  D21H21/14 ,  D21H23/22 ,  D21H19/22

Abstract: A foldable paper-based substrate coated with primer coat and top coat. Primer coat includes a wax-free aqueous dispersion wherein a dry film thereof has a flexibility of at least 1100% for a film thickness from about 1.0 to about 2.5 mm. Top coat is blocking resistant and includes an aqueous dispersion of a polymer providing water resistance, grease or oil resistance, heat resistance, odor barrier, moisture barrier and/or heat sealability to the paper-based product. The top coat aqueous dispersion is characterized in that a dry film thereof has a flexibility of at least 570% for a film thickness from about 1.5 to about 2.5 mm. A process for preparing the coated foldable paper-based substrate includes applying the primer coat to the surface of the paper-based substrate, applying the top coat and drying the coats. The primer coat may be dried before application of the top coat.

公开(公告)号：US20180072915A1

公开(公告)日：2018-03-15

申请号：US15809600

申请日：2017-11-10

Applicant: CASCADES SONOCO INC.

Inventor： Yvon MONGRAIN ,  Guillaume TURGEON

IPC: C09D191/06 ,  D21H19/22 ,  D21H21/16 ,  C09D5/00 ,  D21H23/22 ,  D21H19/18 ,  C09D133/08 ,  D21H19/20 ,  C09D133/04 ,  C09D133/02 ,  C08L23/08 ,  B32B38/00 ,  B32B29/08 ,  B32B29/06 ,  B32B29/00 ,  B32B21/06 ,  B32B21/04 ,  B32B21/02 ,  B32B5/14 ,  B32B5/02 ,  B32B3/28 ,  B32B3/10 ,  B32B3/02 ,  B05D3/12 ,  B05D3/10 ,  B05D3/02 ,  B05D3/00 ,  C09D133/26 ,  C09D191/00 ,  D21H19/00 ,  D21H19/12 ,  D21H25/00 ,  D21J1/08

Abstract: A wet coating composition useful for coating a cellulosic fiber-based substrate is provided. The composition includes two aqueous emulsions. The first emulsion includes an oxidized paraffin/polyethylene wax and the second emulsion includes an ethylene/acrylic acid copolymer wax, ethylene/acrylic amide copolymer wax, ethylene/acrylic acid/acrylic amide copolymer wax or a mixture thereof. The oxidized paraffin/polyethylene wax has a surface energy less than or equal to 25 mN/m being substantially dispersive energy. The wet coating composition when dried forms a coating having a surface energy ranging from 20 to 60 mN/m being the sum of dispersive and polar energies. A process for treating a cellulosic fiber-based substrate with the wet coating composition, a substrate coated and articles including the coated substrate are also described. The process involves a heating step to allow migration of the coating towards a core of the cellulosic fiber-based substrate.