# US 11,028,535 B2 · Fire suppressing pleated packaging paper and method of manufacturing

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,028,535 B2
- Document ID: US11028535B2
- Status: Granted
- Kind: B2
- Application number: 16/197,616
- Filed: 2018-11-21
- Published: 2020-05-21
- Granted: 2021-06-08
- Earliest claimed: 2018-11-21
- Assignees: Packaging and Crating Technologies, LLC
- Applicants: Packaging and Crating Technologies, LLC
- Inventors: Rodger A. Mort, Jr.; Guy Leath Gettle
- Web page: https://patentgrep.com/patent/US11028535B2

## CPC

- D21F 11/12: Making corrugated paper or board
- C09D 11/03: characterised by features other than the chemical nature of the binder
- D21H 19/58: Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
- D21H 21/34: Ignifugeants
- D21H 27/10: Packing paper (packaging materials of special type or form B65D65/38)
- D21H 27/30: Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00)
- D21H 27/40: at least one of the sheets being non-planar, e.g. crêped (crêping or corrugating paper B31F)
- G03F 7/0005: {Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor}
- G03F 7/16: Coating processes; Apparatus therefor (applying coatings to base materials in general B05; applying photosensitive compositions to base for photographic purposes G03C1/74)
- C09D 5/18: Fireproof paints {including high temperature resistant paints}
- C09D 11/107: from unsaturated acids or derivatives thereof
- D21F: PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- 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
- G03F: PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; (phototypographic composing devices B41B; photosensitive materials or processes for photographic purposes G03C; electrophotography, sensitive layers or processes therefor G03G)

## Abstract

The present invention includes pleated paper and planar paper coated with a fire suppressive ink, wherein the pleated paper is Kraft paper with a weight of 25 to 50 pounds, with pleat angles of about 88 to 92°, and pleat heights between approximately 3/32 of an inch and ⅛ of an inch, and the planar paper is Kraft paper with a weight of 40 to 60 pounds. The fire suppressive ink is preferably applied with a flexographic printing process and preferably comprises at least one inorganic fusible salt and an organic resin. The inventive pleated paper is an environmentally friendly packaging material with improved protective qualities, which can also shield items from fire, contain fires, and suppress fires to avoid thermal runaway. The inventive paper is particularly useful for packaging and shipping flammable items, such as lithium-ion batteries.

## Claims

### Claim 1

A method of producing pleated paper with fire suppressive characteristics comprising:
a. providing Kraft paper for pleating having a weight of 25 to 50 pounds, and Kraft paper for planar support having a weight of approximately 40 to 60 pounds;
b. applying a fire suppressive ink to surfaces of the Kraft papers;
c. pleating the Kraft paper having a weight of 25 to 50 pounds so that the apices of each pleat have an angle of about 88 to 92° and a height ranging from approximately 3/32 of an inch to about ⅛ of an inch; and
d. bonding the pleated paper to at least one sheet of Kraft paper having a weight of approximately 40 to 60 pounds for planar support.

### Claim 2 (depends on 1)

The method of claim 1 further comprising bonding the pleated paper to at least two sheets of Kraft paper having a weight of approximately 40 to 60 pounds for planar support.

### Claim 3 (depends on 1)

The method of claim 1, wherein the fire suppressive ink comprises at least one inorganic fusible salt and an organic resin.

### Claim 4 (depends on 3)

The method of claim 3, wherein the inorganic fusible salt contains at least one water molecule bound to an inorganic salt.

### Claim 5 (depends on 3)

The method of claim 3, wherein the inorganic fusible salt releases water when heated.

### Claim 6 (depends on 3)

The method of claim 3, wherein the inorganic fusible salt has a water release temperature below 220 degrees Celsius.

### Claim 7 (depends on 3)

The method of claim 3, wherein the inorganic fusible salt is selected from the group consisting of (a) hydrated boron-containing compounds, (b) hydrated sulfate compounds, (c) hydrated phosphate salts, and (d) hydrated silicates.

### Claim 8 (depends on 3)

The method of claim 3, wherein the organic resin is an acrylic compound.

### Claim 9 (depends on 3)

The method of claim 3, wherein the fire suppressive ink comprises at least two inorganic fusible salts, wherein each inorganic fusible salt has a different water release temperature.

### Claim 10 (depends on 1)

The method of claim 1, wherein the fire suppressive ink is applied to the surfaces of the Kraft paper with a flexographic printing process.

### Claim 11 (depends on 1)

The method of claim 1, wherein the method of producing the pleated paper further comprises a braking system.

### Claim 12 (depends on 1)

The method of claim 1, wherein the method of producing the pleated paper is performed with a pair of mating gears that crush the Kraft paper at the apices of each pleat.

### Claim 13 (depends on 12)

The method of claim 12, wherein the gap between the mating gears is approximately 0.125 inches.

### Claim 14

Pleated paper with fire suppressive characteristics, comprising:
a. pleated Kraft paper having a weight of 25 to 50 pounds, wherein the apices of each pleat has an angle of about 88 to 92° and a pleat height of approximately 3/32 of an inch to about ⅛ of an inch;
b. at least one planar sheet of Kraft paper having a weight of 40 to 60 pounds bonded to the pleated paper; and
c. wherein the surfaces of the pleated and planar Kraft paper are coated with a fire suppressive ink.

### Claim 15 (depends on 14)

The pleated paper of claim 14, which further comprises two planar sheets of Kraft paper having a weight of approximately 40 to 60 pounds bonded to the pleated paper.

### Claim 16 (depends on 14)

The pleated paper of claim 14, wherein the fire suppressive ink comprises at least one inorganic fusible salt and an organic resin.

### Claim 17 (depends on 16)

The pleated paper of claim 16, wherein the inorganic fusible salt contains at least one water molecule bound to an inorganic salt.

### Claim 18 (depends on 16)

The pleated paper of claim 16, wherein the inorganic fusible salt releases water when heated.

### Claim 19 (depends on 16)

The pleated paper of claim 16, wherein the inorganic fusible salt has a water release temperature below 220 degrees Celsius.

### Claim 20 (depends on 16)

The pleated paper of claim 16, wherein the inorganic fusible salt is selected from the group consisting of (a) hydrated boron-containing compounds, (b) hydrated sulfate compounds, (c) hydrated phosphate salts, and (d) hydrated silicates.

### Claim 21 (depends on 16)

The pleated paper of claim 16, wherein the organic resin is an acrylic compound.

### Claim 22 (depends on 16)

The pleated paper of claim 16, wherein the fire suppressive ink comprises at least two inorganic fusible salts, wherein each inorganic fusible salt has a different water release temperature.

### Claim 23 (depends on 14)

The pleated paper of claim 14, wherein the coating of fire suppressive ink is applied by a flexographic printing process.

### Claim 24 (depends on 14)

The pleated paper of claim 14, wherein the fire suppressive ink has a coating weight of approximately 8 cubic microns per square inch anilox volume.

### Claim 25 (depends on 14)

The pleated paper of claim 14, wherein the pleated and planar Kraft paper has two coatings of fire suppressive ink with a coating weight of approximately 8 cubic microns per square inch anilox volume.