Container for freeze-drying

• US 20080256822A1
• Filed: 04/19/2007
• Published: 10/23/2008
• Est. Priority Date: 04/19/2007
• Status: Abandoned Application

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Suzuki, Hiroko, Kanda, Massashi
• Application Number:
  US11/788,353
• Publication Number:
  US 20080256822A1
• Time in Patent Office: Days
• US Class Current: 34/92
• CPC Class Codes: A23L 3/44 Freeze-drying
• CPC Class Codes: B65D 2543/00314 Combination, e.g. laminates, several different materials
• CPC Class Codes: B65D 51/241 provided with freeze-drying means
• CPC Class Codes: B65D 65/38 Packaging materials of special type or form
• CPC Class Codes: B65D 81/261 for draining or collecting liquids without absorbing them
• CPC Class Codes: F26B 5/06 the process involving freezing

Abstract

A container is provided that realizes efficient freeze-drying while preventing contamination during freeze-drying. This freeze-drying container uses a nonporous moisture-permeable film in at least a portion thereof, and the nonporous moisture-permeable film can be formed from a polyurethane or a polyester elastomer.

Claims

1. A container adapted for sealing and housing a freeze-dried article therein, wherein at least a part of the container is made of a nonporous moisture-permeable film.

2. The container according to claim 1, wherein the nonporous moisture-permeable film comprises a hydrophilic polymer selected from the group consisting of copolyether urethane, a mixture of two or more types of copolyether urethanes, copolyether ester elastomer, a mixture of two or more types of copolyether ester elastomers, polyether block polyamide, a mixture of two or more types of polyether block polyamides, a homopolymer or copolymer of polyvinyl alcohol, and two or more types of homopolymers or copolymers of polyvinyl alcohol.

3. The container according to claim 2, wherein the nonporous moisture-permeable film is a composite of the hydrophilic polymer and a support.

4. The container according to claim 1, wherein the entire container is formed from the nonporous moisture-permeable film.

5. The container according to claim 1, comprising a tray in which an article to be freeze-dried is placed, and the nonporous moisture-permeable film affixed to an opening of the tray.

6. The container according to claim 1, comprising a container body adapted for having an article to be freeze-dried placed therein, and a cover removably attached to the container body and having the nonporous moisture-permeable film arranged on at least a portion of the cover.

7. The container according to claim 1, comprising a container body adapted for having an article to be freeze-dried placed therein, the nonporous moisture-permeable film covering an opening of the container body, and a tightening member that presses the nonporous moisture-permeable film against the container body.