Resin container and resin container connected body

Patent metadata

Field	Value
Publication number	US-12186264-B2
Application number	US-201917770302-A
Country	US
Kind code	B2
Filing date	Oct 21, 2019
Priority date	Oct 21, 2019
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

The present invention is a resin container in which an inner wall surface of a container body includes a cyclic olefin copolymer, and a diameter upstream of an outlet of the container body ranges from 0.5 mm to 8.0 mm.

First claim

The invention claimed is:

1. A resin container, comprising:
a container body made of resin, configured to store liquid content, and including an outlet,
wherein the container body includes a body portion configured to store the liquid content,
the outlet of the container body has a smaller diameter than the body portion,
an inner wall surface of the container body that comes into contact with the liquid content includes a cyclic olefin copolymer and a linear low-density polyethylene resin,
at least a portion of a flow path of the liquid content upstream of the outlet has a diameter ranging from 0.5 mm to 8.0 mm,
a main monomer of the linear low-density polyethylene resin is an ethylene,
a comonomer of the linear low-density polyethylene resin introduces a short chain branch in the molecular structure, and
the short chain branch is introduced at a ratio of from 5 to 100 per 1000 units of structural units of the ethylene.

2. The resin container according to claim 1 ,
wherein a proportion of the cyclic olefin copolymer with respect to a resin forming the inner wall surface ranges from 55 mass % to 98 mass %.

3. The resin container according to claim 1 ,
wherein the body portion has an inner lateral cross-sectional area (S 0 ) ranging from 20 mm 2 to 300 mm 2 .

4. The resin container according to claim 3 ,
wherein a ratio (S 0 /S 1 ) between the inner lateral cross-sectional area (S 0 ) of the body portion and a lateral cross-sectional area (S 1 ) of the flow path ranges from 1.5 to 60.

5. The resin container according to claim 1 ,
wherein the container body has a volume ranging from 0.1 ml to 10 mL.

6. The resin container according to claim 5 ,
wherein the liquid content is an external use product.

7. A resin container connected body, comprising:
a connected body having a configuration in which a plurality of the container bodies of the resin containers according to claim 1 are connected together,
wherein, in the connected body, a plurality of the container bodies are disposed side by side with an opening direction of the outlet facing upward, and the resin containers adjacent to each other are connected via a connecting portion provided on side edge portions of the resin containers, and
the connected body is an integrally formed article, and each one of the resin containers is configured to be separated by breaking the connecting portion.

8. The resin container according to claim 1 , wherein a glass transition temperature of the inner wall is from 67° C. or higher to 90° C. or lower.

Assignees

• Rohto Pharma

Inventors

• Ikeda Naohiro
• Kawai Keita

Classifications

• B65D1/095 Primary

  made of flexible material · CPC title

• A61J1/067 Primary

  Flexible ampoules, the contents of which are expelled by squeezing · CPC title