Recording paper and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-12492290-B2
Application number	US-201816628371-A
Country	US
Kind code	B2
Filing date	Jun 28, 2018
Priority date	Jul 12, 2017
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

Provided are a recording paper having not only excellent appearance and high adhesion between a substrate and a resin coating but also high adhesion, particularly, high water resistant adhesion to ink or toner in various printing systems and a method for producing the recording paper. The recording paper of the present invention includes: a substrate composed of a thermoplastic resin film; and a resin coating disposed on at least one side of the substrate, wherein the resin coating contains a resin that is a reaction product of a cationic water-soluble polymer and a silane coupling agent, a content of a silane coupling agent component is 15 to 35 mass % based on a cationic water-soluble polymer component in the resin coating, and the resin coating is free from thermoplastic resin particles.

First claim

The invention claimed is:

1 . A recording paper comprising:
a substrate composed of a thermoplastic resin film; and a resin coating disposed on at least one side of the substrate,
wherein
the resin coating consists of
(a) a resin that is a reaction product of a cationic water-soluble polymer and a silane coupling agent, or
(b) a resin that is a reaction product of a cationic water-soluble polymer and a silane coupling agent, and at least one aid component selected from the group consisting of antistatic agent, crosslinking accelerators, pH adjusters, and defoamers, and

wherein
a content of the silane coupling agent component is 15 to 35 mass % based on a cationic water-soluble polymer component in the resin coating,
the cationic water-soluble polymer comprises a (meth)acrylic polymer or an ethyleneimine polymer,
the cationic water-soluble polymer comprises as the (meth)acrylic polymer or the ethyleneimine polymer:
(i) a first polymer having
a primary or secondary amino group or
a primary or secondary ammonium salt structure, and

(ii) a second polymer having
a tertiary amino group or
a tertiary ammonium salt structure,
said second polymer having neither primary nor secondary amino group nor primary nor secondary ammonium salt structure,
wherein the content of polymeric material having a tertiary amino group or a tertiary ammonium salt structure in the resin film is 100 parts by mass or less based on 113 parts by mass of the cationic water-soluble polymer, and

wherein the (meth)acrylic polymer or the ethyleneimine polymer has a weight-average molecular weight of greater than 20,000 and not greater than 1,000,000 and does not have a quaternary ammonium salt structure, and
the resin coating is free from thermoplastic resin particles.

2 . The recording paper according to claim 1 , wherein the silane coupling agent is an epoxy silane coupling agent.

3 . The recording paper according to claim 1 , wherein the thermoplastic resin film is a polyolefin resin film or a polyester resin film.

4 . The recording paper according to claim 1 , wherein a thickness of the resin coating is 0.1 μm or more and 5 μm or less.

5 . The recording paper according to claim 1 , wherein the resin coating comprises an antistatic agent,
wherein the antistatic agent
is an acrylic resin having a quaternary ammonium salt structure, and
does not react with the silane coupling agent.

6 . The recording paper according to claim 5 , wherein a content of the antistatic agent is 0.01 parts by mass or more and 45 parts by mass or less based on a cationic water-soluble polymer component in the resin coating, with respect to 100 parts by mass of the cationic water-soluble polymer.

7 . The recording paper according to claim 1 , wherein the content of the polymeric material having said primary or secondary group or ammonium salt structure in the resin film is 25 parts by mass or less based on 125 parts by mass of the cationic water-soluble polymer.

Assignees

• Yupo Corp

Inventors

• IKARASHI Takuya
• Sugamata Yutaro

Classifications

• C08J7/044

  Forming conductive coatings; Forming coatings having anti-static properties · CPC title

• G03G7/008

  being macromolecular · CPC title

• G03G7/0046

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C08J2433/14

  of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen · CPC title

• C08J2323/12

  Polypropene · CPC title