# US 12,214,932 B2 · Zipper tape and container equipped with zipper tape

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- Number: US 12,214,932 B2
- Document ID: US12214932B2
- Status: Granted
- Kind: B2
- Application number: 17/614,581
- Filed: 2020-05-28
- Published: 2022-07-21
- Granted: 2025-02-04
- Earliest claimed: 2019-05-31
- Assignees: Idemitsu Unitech Co., Ltd.
- Applicants: Idemitsu Unitech Co., Ltd.
- Inventors: Hiroaki Yoshimura
- Web page: https://patentgrep.com/patent/US12214932B2

## CPC

- B65D 33/2508: {using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor}
- B65D 33/2541: {characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape}
- A44B 19/16: Interlocking member having uniform section throughout the length of the stringer {(for sacks or bags B65D33/2508)}
- B65D 65/466: {Bio- or photodegradable packaging materials}
- C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence)
- C08L 101/16: the macromolecular compounds being biodegradable
- C08L 2201/06: Biodegradable
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- Y02W 90/10: Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
- 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
- A44B: BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE (fastenings specially adapted for footwear A43C)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A zipper tape is in an elongated shape and includes, in a cross-sectional shape, a pair of base strips and engagement portions projecting from surfaces facing each other of the pair of respective base strips, the engagement portions being engageable with each other. At least the engagement portions are each formed of a first biodegradable resin composition having a yield strain of 3.4% or more during a tensile test.

## Claims

### Claim 1

A zipper tape in an elongated shape, comprising, in a cross-sectional shape, a pair of base strips and engagement portions projecting from respective surfaces facing each other of the pair of base strips, the engagement portions being engageable with each other, wherein
at least the engagement portions each comprise a first biodegradable resin composition having a yield strain of 15% or more during a tensile test, and
wherein the first biodegradable resin composition comprises, a content of polybutylene succinate (PBS) in a range of 60 mass % to 90 mass % and a content of poly (butylene adipate/terephthalate) (PBAT) in a range of 10 mass % to 40 mass %.

### Claim 2 (depends on 1)

The zipper tape according to claim 1, wherein the first biodegradable resin composition further comprises a plasticizer.

### Claim 3 (depends on 1)

The zipper tape according to claim 1, wherein the yield strain during the tensile test is equal to or less than 30%.

### Claim 4 (depends on 1)

The zipper tape according to claim 1, wherein surfaces of the pair of base strips opposite the surfaces facing each other each comprise a second biodegradable resin composition different from the first biodegradable resin composition.

### Claim 5 (depends on 4)

The zipper tape according to claim 4, wherein the second biodegradable resin composition comprises at least any one of polybutylene succinate (PBS), poly (butylene adipate/terephthalate) (PBAT), or poly (butylene succinate/adipate) (PBSA).

### Claim 6 (depends on 4)

The zipper tape according to claim 4, wherein the second biodegradable resin composition comprises at least any one of polybutylene succinate (PBS) or poly (butylene succinate/adipate) (PBSA).

### Claim 7 (depends on 6)

The zipper tape according to claim 6, wherein in the second biodegradable resin composition, a content of polybutylene succinate (PBS) is equal to or less than 90 mass % and a content of poly (butylene succinate/adipate) (PBSA) is in a range from 10 mass % to 100 mass %.

### Claim 8 (depends on 1)

A zipper-tape-equipped container comprising:
the zipper tape according to claim 1; and
a container body to which the zipper tape is bonded.

### Claim 9 (depends on 8)

The zipper-tape-equipped container according to claim 8, wherein the container body is in a form of a bag body.