Use of polymer film for packaging a culture medium

Patent metadata

Field	Value
Publication number	US-10144912-B2
Application number	US-201415103135-A
Country	US
Kind code	B2
Filing date	Dec 19, 2014
Priority date	Dec 20, 2013
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A polymer film for packaging at least one microorganism culture medium includes at least one layer of polystyrene and at least one heat-sealing layer. The polymer film has an average water vapor permeability of between 30.0 g/m2×24 hours and 140.0 g/m2×24 hours, preferentially between 70.0 g/m2×24 hours and 120.0 g/m2×24 hours.

First claim

The invention claimed is:

1. A polymer film for packaging at least one microorganism culture medium, said film comprising at least one layer of polystyrene and at least one heat-sealing layer, wherein at least one of the layers is microperforated so as to include perforations having sizes of between 10 μm and 50 μm and the film has an average water vapour permeability of between 30.0 g/m 2 ×24 hours and 140.0 g/m 2 ×24 hours.

2. The polymer film according to claim 1 , wherein the film has a thickness of between 20 and 80 μm.

3. A sachet containing at least one microorganism culture medium that are each deposited on a separate support, wherein the sachet is produced from the polymer film according to claim 1 .

4. A process for packaging at least one microorganism culture medium, comprising:
placing the culture medium or media on the heat-sealing layer of the polymer film according to claim 1 ;
covering the culture medium or media with a portion, which has remained free, of said film or with another film, such that the heat-sealing layers are facing one another; and
securing the edges of the film or of the two films, such that the culture medium or media is or are trapped in a sachet thus formed.

5. The packaging process according to claim 4 , wherein the film(s) is (are) presterilized.

6. The packaging process according to claim 5 , wherein the sterilization method is irradiation with radiation selected from the group consisting of gamma-rays and beta-rays.

7. The packaging process according to claim 4 , wherein the securing step is a heat-sealing step at a temperature of between 100 and 170° C.

8. The packaging process according to claim 4 , further comprising:
placing the sachet inside a second sachet; and
sealing said second sachet.

9. The packaging process according to claim 8 , further comprising:
placing the second sachet inside a third sachet; and
sealing said third sachet.

10. The packaging process according to claim 9 , wherein said second and/or third sachets are made from a material selected from the group consisting of cellophane, polyolefins and polyamides.

11. The polymer film according to claim 1 , wherein the heat-sealing layer is a polyethylene, polypropylene, or polyvinyl chloride layer.

12. The packaging process according to claim 4 , wherein each culture medium trapped in the sachet is deposited on a separate support.

13. A polymer film for packaging at least one microorganism culture medium, said film comprising at least one layer of polystyrene and at least one heat-sealing layer, wherein the film has a thickness of between 20 and 80 μm and an average water vapour permeability of between 30.0 g/m 2 ×24 hours and 140.0 g/m 2 ×24 hours.

14. A sachet containing at least one microorganism culture medium that are each deposited on a separate support, wherein the sachet is produced from the polymer film according to claim 13 .

15. A process for packaging at least one microorganism culture medium, comprising:
placing the culture medium or media on the heat-sealing layer of the polymer film according to claim 13 ;
covering the culture medium or media with a portion, which has remained free, of said film or with another film, such that the heat-sealing layers are facing one another; and
securing the edges of the film or of the two films, such that the culture medium or media is or are trapped in a sachet thus formed.

16. The packaging process according to claim 15 , wherein the film(s) is (are) presterilized.

17. The packaging process according to claim 16 , wherein the sterilization method is irradiation with radiation selected from the group consisting of gamma-rays and beta-rays.

18. The packaging process according to claim 15 , wherein the securing step is a heat-sealing step at a temperature of between 100 and 170° C.

19. The packaging process according to claim 15 , further comprising:
placing the sachet inside a second sachet; and
sealing said second sachet.

20. The packaging process according to claim 19 , further comprising:
placing the second sachet inside a third sachet; and
sealing said third sachet.

21. The packaging process according to claim 20 , wherein said second and/or third sachets are made from a material selected from the group consisting of cellophane, polyolefins and polyamides.

22. The polymer film according to claim 13 , wherein the heat-sealing layer is a polyethylene, polypropylene, or polyvinyl chloride layer.

23. The packaging process according to claim 15 , wherein each culture medium trapped in the sachet is deposited on a separate support.

Assignees

• Biomerieux Sa

Inventors

• Tetart Bruno
• Simon Nathalie

Classifications

• B65D77/04

  Articles or materials enclosed in two or more containers disposed one within another · CPC title

• B65B11/50

  Enclosing articles, or quantities of material, by disposing contents between two sheets, e.g. pocketed sheets, and securing their opposed free margins (apparatus or devices for forming pockets in or from sheets, blanks or webs B65B47/00) · CPC title

• B32B3/266

  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 · CPC title

• B32B27/302

  comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers · CPC title

• C12N1/04

  Preserving or maintaining viable microorganisms (immobilised microorganisms C12N11/00) · CPC title