# US 2014/0193633 A1 · Non-transparent art paper which prevents ink seepage

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- Number: US 2014/0193633 A1
- Document ID: US20140193633A1
- Status: Published application
- Kind: A1
- Application number: 13/919,355
- Filed: 2013-06-17
- Published: 2014-07-10
- Earliest claimed: 2013-01-10
- Inventors: Ricardo MILLARES-NEYRA; Ricardo Millares-Sotres; Dalila Rivera-Carmona
- Web page: https://patentgrep.com/patent/US20140193633A1

## CPC

- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 29/005: {next to another layer of paper or cardboard layer}
- B32B 29/06: specially treated, e.g. surfaced, parchmentised
- D21H 17/36: Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
- D21H 17/67: Water-insoluble compounds, e.g. fillers, pigments
- D21H 27/30: Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00)
- B32B 2255/12: on paper layer
- B32B 2255/26: Polymeric coating
- B32B 2255/28: Multiple coating on one surface
- B32B 2260/028: Paper layer
- B32B 2260/046: Synthetic resin
- B32B 2307/406: Bright, glossy, shiny surface
- B32B 2307/41: Opaque
- B32B 2307/726: Permeability to liquids, absorption
- B32B 2307/7265: Non-permeable
- B32B 2307/728: Hydrophilic
- B32B 2554/00: Paper of special types, e.g. banknotes
- Y10T 428/25: Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T 428/254: Polymeric or resinous material
- Y10T 428/256: Heavy metal or aluminum or compound thereof
- Y10T 428/258: Alkali metal or alkaline earth metal or compound thereof
- Y10T 428/259: Silicic material
- Y10T 428/31515: As intermediate layer
- Y10T 428/31663: As siloxane, silicone or silane
- Y10T 428/3179: Next to cellulosic
- Y10T 428/31895: Paper or wood
- Y10T 428/31899: Addition polymer of hydrocarbon[s] only
- Y10T 428/31902: Monoethylenically unsaturated
- Y10T 428/31993: Of paper
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A non-transparent paper is described for non-transparent art or graphic design sketches, which prevents seepage of the inks, it accepts any type of gel, water-based, solvent-based, oil-based or mixed inks and solid materials for sketching and drawing, as well as fixatives for the solid materials. This paper consists of a lamination of at least two sheets of uncoated bond paper, inserting at least one intermediate layer of pigmented opacifying emulsion between both sheets, applied between the layers of paper to prevent transparency and the seepage of inks from one face of the lamination to the other. This layer of emulsion contains at least one opacifying pigment, at least one adhesive, agents to control viscosity and surface tension and other components. The outside layers of paper have a drying capacity which fixes the materials used for the sketching and prevent outlines made on one face passing to the adjacent sheets of paper, and also has a texture suitable for receiving any dry material for drawing or sketching.

## Claims

### Claim 1

A sketch paper for art and design applications comprising:
(a) at least two base sheets of bond paper, wherein the sheets of bond paper are of the same type and same weight; and
(b) at least one intermediate layer inserted between and coupled to the two base sheets, wherein the intermediate layer comprises an emulsion;
such that the sketch paper is at substantially opaque and both sides of the paper are suitable for the application of dry drawing and non-dry art materials.

### Claim 2 (depends on 1)

The sketch paper of claim 1, wherein the emulsion comprises:
(a) at least one chemical opacifier compound;
(b) at least one adhesive;
(c) at least one styrene copolymer emulsion; and
(d) at least one viscosity and surface tension control agent.

### Claim 3 (depends on 2)

The sketch paper of claim 2, wherein at least one chemical opacifier compound is selected from the group of carbon black, rutile titanium dioxide, anatase titanium dioxide, calcium carbonate, kaolin with laminar structure, calcined kaolin, white polymers, organic pigments, and inorganic pigments.

### Claim 4 (depends on 3)

The sketch paper of claim 3, wherein at least one chemical opacifier compound has an average particle size of between 0.5 microns and 2 microns.

### Claim 5 (depends on 2)

The sketch paper of claim 2, wherein at least one styrene copolymer emulsion is selected from the group of styrene-butadiene copolymers, styrene-acrylic emulsion copolymers, styrene-acetylated starch copolymers, styrene-oxidized starch copolymers, and styrene-low viscosity highly hydrolyzed polyvinyl alcohols copolymers.

### Claim 6 (depends on 2)

The sketch paper of claim 2, wherein at least one viscosity and surface tension control agent is an acrylic polymer.

### Claim 7 (depends on 2)

The sketch paper of claim 2, wherein at least one viscosity and surface tension control agent is a non-ionic surfactant.

### Claim 8 (depends on 7)

The sketch paper of claim 7, wherein at least one viscosity and surface tension control agent is selected from consisting of surfynole ct-131, surfynole ct-171, Solfix 855, and triton X-100.

### Claim 9 (depends on 2)

The sketch paper of claim 2, wherein the inside of each base sheet is coated with a mixture comprising 50% carboxylated polyvinyl alcohol (99% hydrolysis), 0.5% Triton X-100, 45% insolubilizing resin, and 4.5% Acrylic styrene.

### Claim 10 (depends on 9)

The sketch paper of claim 9 wherein the insolubilizing resin comprises cationic polymers of polyamine-epichlorhydrine.

### Claim 11 (depends on 2)

The sketch paper of claim 2, further comprising at least one synthetic and/or natural resin on at least one of the inside and the outside of each base sheet.

### Claim 12 (depends on 11)

The sketch paper of claim 11, wherein at least one resin is selected from the group consisting of polyolefins, polyethylene, polypropylene, styrene acrylic resins, polyester resins, other polymers, waxes and silicones.

### Claim 13 (depends on 2)

The sketch paper of claim 2, further comprising at least one additional intermediate layer inserted between the two base sheets, wherein at least one such additional intermediate layer comprises one or more additional emulsions.

### Claim 14 (depends on 2)

The sketch paper of claim 2, wherein the two base sheets may have different finishes on the outside of each base sheet.

### Claim 15 (depends on 14)

The sketch paper of claim 14, wherein at least one of the base sheets may be covered with at least one finishing material selected from the group of kaolins and adhesives.

### Claim 16 (depends on 2)

The sketch paper of claim 2, wherein at least one of the base sheets is impregnated with one or more cationic wet strength additives.

### Claim 17 (depends on 16)

The sketch paper of claim 16, wherein at least one of the base sheets is further impregnated with one or more carboxylated polyvinyl alcohols.

### Claim 18 (depends on 2)

The sketch paper of claim 2, wherein the opacity of the sketch paper is between 88% and 99.5% TAPPI T-452.

### Claim 19 (depends on 2)

The sketch paper of claim 2 wherein the TAPPI T-425 brightness of the sketch paper is between 88 to 90%.

### Claim 20 (depends on 2)

The sketch paper of claim 2, wherein the finish of the sketch paper has a Gurley Hill porosity of between 20 and 10 sec/100 ml.

### Claim 21 (depends on 2)

The sketch paper of claim 2, wherein the weight of the base papers is between 68 and 100 g/m2.

### Claim 22 (depends on 2)

The sketch paper of claim 2, wherein the composition by percent weight of said emulsion is 5% kaolin with laminar structure, 5% calcined kaolin, 0.5% Surfynol ct 171, 0.5% insolubilizer, 58% acrylic emulsions, 30% styrene acrylic polymers, and 1% carbon black.

### Claim 23 (depends on 2)

The sketch paper of claim 2, wherein the composition by percent weight of said emulsion is 10% calcined kaolin, 0.5% Surfynol ct 171, 0.5% insolubilizer, 59% acrylic emulsions, 30% styrene acrylic polymers, and 1% carbon black.

### Claim 24 (depends on 2)

The sketch paper of claim 2, wherein the composition by percent weight of said emulsion is 5% calcined kaolin, 5% anatase titanium dioxide, 0.5% Surfynol ct 171, 0.5% insolubilizer, 59% acrylic emulsions, 29% styrene acrylic polymers, and 1% carbon black.

### Claim 25 (depends on 2)

The sketch paper of claim 2, wherein the composition by percent weight of said emulsion is 5% calcined kaolin, 5% anatase titanium dioxide, 0.5% Surfynol ct 171, 0.5% insolubilizer, 58% acrylic emulsions, 30% styrene acrylic polymers, and 1% carbon black.

### Claim 26 (depends on 2)

The sketch paper of claim 2, further comprising at least one additional intermediate layer of paper placed between the two base sheets, wherein this intermediate paper layer may be coated on one or both sides by resins, and wherein at least one resin is selected from the group consisting of polyolefins, polyethylene, polypropylene, styrene acrylic resins, polyester resins, or other polymers, waxes, and silicones.