# US 4,392,581 A · Container closure having a liner and method for its production

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- Number: US 4,392,581 A
- Document ID: US4392581A
- Status: Granted
- Kind: A
- Application number: 06/395,910
- Filed: 1982-07-07
- Granted: 1983-07-12
- Earliest claimed: 1981-07-09
- Assignees: Japan Crown Cork Co., Ltd.
- Inventors: Junichi Itsubo; Fumio Mori; Hideki Sato
- Web page: https://patentgrep.com/patent/US4392581A

## CPC

- B65D 53/06: Sealings formed by liquid or plastic material
- C09D 127/06: Homopolymers or copolymers of vinyl chloride
- Y10T 428/214: End closure
- Y10T 428/31935: Ester, halide or nitrile of addition polymer
- 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
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A container closure having a sealing liner comprising a vinyl chloride-type resin is provided which has excellent sealing properties, openability and hygienic characteristics. The liner is composed of a composition, especially a plastisol composition, comprising 100 parts by weight of the vinyl chloride-type resin and 35 to 200 parts by weight of a mixed fatty acid ester of glycerin derived from glycerin, at least one saturated or unsaturated fatty acid component having an even number of carbon atoms between 6 and 24 and at least one acetic or butyric acid component, such as a diacetyl higher fatty acid glyceride. A method for producing the container closure is also provided.

## Claims

### Claim 1

A container closure having a sealing liner comprising a vinyl chloride-type resin, said liner being composed of a composition comprising 100 parts by weight of the vinyl chloride-type resin and 35 to 200 parts by weight of a mixed fatty acid ester of glycerin derived from glycerin, at least one saturated or unsaturated fatty acid component having an even number of carbon atoms between 6 and 24 and at least one acetic and/or butyric acid component.

### Claim 2 (depends on 1)

The container closure of claim 1 wherein the mixed fatty acid ester of glycerin is a diacetyl higher fatty acid glyceride.

### Claim 3 (depends on 1)

The container closure of claim 1 wherein the amount of the mixed fatty acid ester of glycerin is 50 to 150 parts by weight.

### Claim 4 (depends on 1)

The container closure of claim 1 wherein said liner is composed of a plastisol of the vinyl chloride-type resin dispersed in the mixed fatty acid ester of glycerin.

### Claim 5 (depends on 4)

The container closure of claim 4 wherein the plastisol consists of 100 parts by weight of the vinyl chloride-type resin, 50 to 150 parts by weight of the mixed fatty acid ester of glycerin as a plasticizer, 0 to 2 parts by weight of a blowing agent, 0.5 to 3 parts by weight of a stabilizer, 1 to 5 parts by weight of a lubricant, 1 to 10 parts by weight of a filler and 0 to 5 parts by weight of a pigment.

### Claim 6 (depends on 1)

The container closure of claim 1 wherein the liner further contains 10 to 60% by weight, based on the mixed fatty acid ester of glycerin, of an epoxy-type plasticizer or a polyester-type plasticizer.

### Claim 7 (depends on 1)

The container closure of claim 1 wherein the liner is foamed so that its apparent density is kept at 0.4 to 1.2.

### Claim 8

A method for producing a container closure having a liner, which comprises applying to the inside of a container closure a plastisol comprising 100 parts by weight of particles of a vinyl chloride-type resin and 35 to 200 parts by weight of a mixed fatty acid ester of glycerin derived from glycerin, at least one saturated or unsaturated fatty acid component having an even number of carbon atoms between 6 and 24 and at least one acetic and/or butyric acid component, and gelling the plastisol to a liner form.