# US 2017/0283136 A1 · Integrated One-Way Valve with Polyol Film

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- Number: US 2017/0283136 A1
- Document ID: US20170283136A1
- Status: Published application
- Kind: A1
- Application number: 15/465,851
- Filed: 2017-03-22
- Published: 2017-10-05
- Earliest claimed: 2016-04-05
- Assignees: Sonoco Development, Inc.
- Applicants: Sonoco Development, Inc.
- Inventors: Jacob Donald Prue Branyon
- Web page: https://patentgrep.com/patent/US20170283136A1

## CPC

- B65D 51/16: with means for venting air or gas
- B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12}
- B32B 7/04: Interconnection of layers
- B32B 7/06: permitting easy separation
- B32B 7/14: applied in spaced arrangements, e.g. in stripes
- B32B 27/08: of synthetic resin
- B32B 27/24: using solvents or swelling agents
- B32B 27/285: {comprising polyethers}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/34: comprising polyamides
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B65D 33/01: Ventilation or drainage of bags
- B65D 43/02: Removable lids or covers (with means for piercing, cutting, or tearing a frangible inner closure B65D51/22)
- B65D 51/1644: {the element being a valve (B65D51/1661 takes precedence)}
- B65D 51/20: Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing {(B65D51/185 takes precedence; co-operating with an auxiliary container for additional articles or materials B65D51/28)}
- B65D 77/225: {Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element}
- B32B 37/1292: {selectively, e.g. in stripes, in patterns (B32B37/0076 takes precedence)}
- B32B 2250/02: 2 layers
- B32B 2250/24: All layers being polymeric
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/24: Organic non-macromolecular coating
- B32B 2255/26: Polymeric coating
- B32B 2435/02: for containers
- B32B 2439/40: Closed containers
- B32B 2439/70: Food packaging
- B32B 2553/00: Packaging equipment or accessories not otherwise provided for
- B32B 2581/00: Seals; Sealing equipment; Gaskets
- B65D 2251/0018: of the 43-type
- B65D 2251/0093: Membrane
- 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
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

A one-way valve integrated into a lamination of the kind used as a membrane seal for coffee containers and the like. The valve comprises a top layer, a substrate and a fluid polyol film. The top layer and the substrate are adhered together by an adhesive disposed between the top layer and the substrate. The adhesive defines a boundary of a valve chamber in which the top layer and the substrate are not permanently adhered to each other. The film enhances the adhesiveness of the top layer to the substrate in the area of the valve chamber so that gas inside the container does not escape until the internal pressure reaches a minimum value.

## Claims

### Claim 1

A one-way valve for use with a container, the valve comprising:
a laminate comprising a substrate and a top layer, the substrate defining one or more inlet openings, the top layer defining one or more outlet openings;
an adhesive disposed between the top layer and the substrate and adhering the top layer to the substrate, the adhesive defining a boundary of a valve chamber in which the top layer and the substrate are not permanently adhered to each other, wherein the one or more inlet openings fluidly connect an interior of the container to the valve chamber and the one or more outlet openings fluidly connect the valve chamber to an exterior surrounding the container; and
a fluid film occupying at least a portion of the valve chamber and adhering the top layer to the substrate within the valve chamber when a pressure differential between an internal pressure of the container and an ambient air pressure is less than a minimum gas release pressure differential; wherein
the fluid film does not comprise a silicon oil or glycerin.

### Claim 2 (depends on 1)

The one-way valve of claim 1 wherein the fluid film comprises a polyol.

### Claim 3 (depends on 2)

The one-way valve of claim 2 wherein the polyol comprises two or three hydroxyl groups.

### Claim 4 (depends on 2)

The one-way valve of claim 2 wherein the polyol is a polyether polyol.

### Claim 5 (depends on 2)

The one-way valve of claim 2 wherein the polyol does not degrade the laminate.

### Claim 6 (depends on 2)

The one-way valve of claim 2 wherein the valve has a first cycle opening pressure of >0.15 psi.

### Claim 7 (depends on 6)

The one-way valve of claim 6 wherein the valve has an all cycles opening pressure of >0.10 psi.

### Claim 8 (depends on 2)

The one-way valve of claim 2 wherein the valve recloses before the internal pressure decreases below 0.04 psi.

### Claim 9 (depends on 2)

The one-way valve of claim 2 wherein the valve recloses before the internal pressure decreases below 0.01 psi.

### Claim 10 (depends on 2)

The one-way valve of claim 2 wherein:
the substrate and the top layer are each formed from organic polymer sheet material.

### Claim 11 (depends on 10)

The one-way valve of claim 10 wherein:
the organic polymer sheet material is selected from the group consisting of polyolefin, polyamides, polyesters, polycarbonates, high density polyethylene (HDPE), polyvinyl chloride (PVC), ethylene vinyl alcohol (EVOH), polyvinyl alcohol (PVOH) and polyvinylidene chloride (PVDC).

### Claim 12 (depends on 2)

The one-way valve of claim 2 wherein:
the container is a flexible package, and the package wall is the substrate.

### Claim 13 (depends on 2)

The one-way valve of claim 2 wherein:
the substrate is a layer or layers of material adhered to an outer surface of the container.

### Claim 14 (depends on 2)

The one-way valve of claim 2 wherein:
the container is a rigid plastic container having a removable flexible seal that covers a top opening and defines the valve inlet openings; and
the valve top layer is adhered to the flexible seal so that it covers the inlet openings.

### Claim 15 (depends on 2)

The one-way valve of claim 2 wherein:
the fluid film and the adhesive are printed onto a top surface of the substrate.

### Claim 16 (depends on 2)

The one-way valve of claim 2 wherein:
the fluid film and the adhesive are printed onto a bottom surface of the top layer.