Ink jet recording sheet

• US 5,958,564 A
• Filed: 12/24/1996
• Issued: 09/28/1999
• Est. Priority Date: 12/27/1995
• Status: Expired due to Fees

• Current Assignee: Tomoegawa Paper Company Limited (Tomoegawa Co., Ltd.)
• Original Assignee: Tomoegawa Paper Company Limited (Tomoegawa Co., Ltd.)
• Inventors: Iwamoto, Kiyoshi, Yoshizawa, Senichi
• Primary Examiner(s): Schwartz, Pamela R.
• Application Number:
  US08/773,320
• Time in Patent Office: 1,008 Days
• Field of Search: 428/195, 428/212, 428/331, 428/500, 428/207, 428/409
• US Class Current: 428/212
• CPC Class Codes: B41M 5/506 Intermediate layers
• CPC Class Codes: B41M 5/5218 characterised by inorganic additives, e.g. pigments, clays
• CPC Class Codes: B41M 5/5254 characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
• CPC Class Codes: Y10T 428/24901 including coloring matter
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/259 Silicic material
• CPC Class Codes: Y10T 428/31 Surface property or characteristic of web, sheet or block
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

An ink jet recording sheet comprising: a support member; a first ink receiving layer comprising at least silica which is on the support member, and a second ink receiving layer comprising at least silica in different conditions from the conditions in the first ink receiving layer, and which is on the first ink receiving layer.

Claims

1. An ink jet recoding sheet comprising:

a support member;

a first ink receiving layer on said support member comprising first silica particles; and

a second ink receiving layer on said first ink receiving layer comprising second silica particles,

wherein said first silica particles have a smaller average particle size than said second silica particles, and

said second silica particles have an average particle size of at least 7.0 μ

m.

2. The ink jet recording sheet according to claim 1, wherein the first silica particles comprise 50 to 90% by weight of the first ink receiving layer, and the second silica particles comprise 50 to 80% by weight of the second ink receiving layer.

3. The ink jet recording sheet according to claim 2, wherein a glossy layer is mounted on the second ink receiving layer, said glossy layer having a specular glossiness value of greater than 10%,

wherein said specular glossiness value is measured at a 60°

angle of incidence.

4. The ink jet recording sheet according to claim 2, wherein the percent by weight of silica comprising the first ink receiving layer is equal to or more than the percent by weight of silica comprising the second ink receiving layer.

5. The ink jet recording sheet according to claim 4, wherein the average particle size of the first silica particles is 1.0 to 6.0 μ

m, and the average particle size of the second silica particles is 7.0 to 25.0 μ

m.

6. The ink jet recording sheet according to claim 5, wherein the second ink receiving layer comprises polyvinyl pyrrolidone as a binder resin, and wherein said polyvinyl pyrrolidone is 10 to 60% by weight of a total binder resin composition.

7. The ink jet recording sheet according to claim 6, wherein a glossy layer is mounted on the second ink receiving layer, said glossy layer having a specular glossiness value of greater than 10%,

wherein said specular glossiness value is measured at a 60°

angle of incidence.

8. The ink jet recording sheet according to claim 5, wherein a glossy layer is mounted on the second ink receiving layer, said glossy layer having a specular glossiness value of greater than 10%,

wherein said specular glossiness value is measured at a 60°

angle of incidence.

9. The ink jet recording sheet according to claim 4, wherein the second ink receiving layer comprises polyvinyl pyrrolidone as a binder resin, and wherein said polyvinyl pyrrolidone is 10 to 60% by weight of a total binder resin composition.

10. The ink jet recording sheet according to claim 9, wherein a glossy layer is mounted on the second ink receiving layer, said glossy layer having a specular glossiness value of greater than 10%,

wherein said specular glossiness value is measured at a 60°

angle of incidence.

11. The ink jet recording sheet according to claim 4, wherein a glossy layer is mounted on the second ink receiving layer, said glossy layer having a specular glossiness value of greater than 10%,

wherein said specular glossiness value is measured at a 60°

angle of incidence.

12. The ink jet recording sheet according to claim 2, wherein the second ink receiving layer comprises polyvinyl pyrrolidone as a binder resin, and wherein said polyvinyl pyrrolidone is 10 to 60% by weight of a total binder resin composition.

13. The ink jet recording sheet according to claim 12, wherein a glossy layer is mounted on the second ink receiving layer, said glossy layer having a specular glossiness value of greater than 10%,

wherein said specular glossiness value is measured at a 60°

angle of incidence.

14. The ink jet recording sheet according to claim 1, wherein a glossy layer is mounted on the second ink receiving layer, said glossy layer having a specular glossiness value of greater than 10%,

wherein said specular glossiness value is measured at a 60°

angle of incidence.

15. The ink jet recording sheet according to claim 14, wherein said glossy layer comprises colloidal silica particles.