# US 11,027,878 B2 · Repulpable corrugated protein box and process for making same using wire side impregnation

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- Number: US 11,027,878 B2
- Document ID: US11027878B2
- Status: Granted
- Kind: B2
- Application number: 16/536,475
- Filed: 2019-08-09
- Published: 2020-05-07
- Granted: 2021-06-08
- Earliest claimed: 2018-06-13
- Assignees: Interstate Resources, Inc.
- Applicants: Interstate Resources, Inc.
- Inventors: Lawrence C. Nykwest; Meredith Sexton; Kathleen Harmon
- Web page: https://patentgrep.com/patent/US11027878B2

## CPC

- B65D 5/563: {Laminated linings; Coatings}
- B65D 5/64: Lids
- B65D 65/403: {with at least one corrugated layer}
- B65D 65/42: Applications of coated or impregnated materials
- B65D 65/46: Applications of disintegrable, dissolvable or edible materials
- B65D 85/70: {for materials not otherwise provided for}
- D21H 17/02: Material of vegetable origin (proteins D21H17/22; lignins D21H17/23; polysaccharides D21H17/24; rosin D21H17/62)
- D21H 17/15: Polycarboxylic acids, e.g. maleic acid
- D21H 17/28: Starch
- D21H 19/54: Starch
- D21H 19/58: Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
- D21H 21/16: Sizing or water-repelling agents
- D21H 27/10: Packing paper (packaging materials of special type or form B65D65/38)
- D21H 27/32: with materials applied between the sheets (attaching together paper or cardboard sheets B31F5/00; adhesives C09J)
- D21H 27/40: at least one of the sheets being non-planar, e.g. crêped (crêping or corrugating paper B31F)
- B65D 5/5054: {formed by a plurality of layers contacting each other, e.g. multiple layers of corrugated cardboard}
- B65D 2565/385: especially suited for or with means facilitating recycling
- C09J 103/02: Starch; Degradation products thereof, e.g. dextrin
- Y02W 30/80: Packaging reuse or recycling, e.g. of multilayer packaging (bio-packaging Y02W90/10)
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- 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
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A repulpable moisture resistant protein box having a composite structure with a fluted medium, a top backing board secured to one side of the fluted medium and a bottom backing board secured to the other side of the fluted medium. The backing boards are impregnated with a hydrogenated triglyceride on the wire side and the fluted medium is also impregnated with a hydrogenated triglyceride. The backing boards each have an outer felt side surface coated with styrene acrylic co-polymer. The protein boxes have a higher compression, moisture resistance and are recyclable.

## Claims

### Claim 1

A process for making a repulpable and recyclable protein box comprising the steps of:
a) impregnating a corrugated paper medium with hydrogenated triglyceride (HT);
b) impregnating a first paper liner board solely through its wire side with HT;
c) impregnating a second paper liner board solely through its wire side with HT;
d) coating said impregnated first paper liner board on its felt side with a coating which is a styrene acrylic co-polymer solution having 40% to 70% solids;
e) coating said impregnated second paper liner board on its felt side with a coating which is a styrene acrylic co-polymer solution having 40% to 70% solids;
f) securing said first impregnated and coated liner board, said corrugated medium and said second impregnated and coated liner board together with an adhesive to form a composite sheet; and
g) curing said composite sheet.

### Claim 2 (depends on 1)

A process as claimed in claim 1 wherein said hydrogenated triglyceride is beef tallow is 100% by weight.

### Claim 3 (depends on 1)

A process as claimed in claim 1 wherein said hydrogenated triglyceride is palm oil.

### Claim 4 (depends on 1)

A process as claimed in claim 1 wherein said adhesive is a starch solution.

### Claim 5 (depends on 4)

A process as claimed in claim 4 wherein said starch adhesive has a solid content ranging from about 25% to about 35%.

### Claim 6 (depends on 1)

A process as claimed in claim 1 wherein the hydrogenated triglyceride is an animal fat selected from one or more of a group consisting of beef tallow, pork lard, poultry grease, and fish oils.

### Claim 7 (depends on 1)

A process as claimed in claim 1 wherein the hydrogenated triglyceride is a hydrogenated vegetable oil selected from one or more of a group consisting of soybean oil, peanut oil, olive oil, palm oil, coconut oil and cottonseed oil.

### Claim 8 (depends on 1)

A process for making a repulpable and recyclable protein box as claimed in claim 1 wherein the protein box is a poultry box.

### Claim 9 (depends on 1)

A process for making a repulpable and recyclable protein box as claimed in claim 1 including the step of:
a) cutting the composite sheet into blanks.