Edible water-soluble film

Patent metadata

Field	Value
Publication number	US-10829621-B2
Application number	US-201313740053-A
Country	US
Kind code	B2
Filing date	Jan 11, 2013
Priority date	Jan 11, 2013
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

Disclosed herein are water-soluble films and resulting packets including a water soluble film, wherein the water-soluble film includes a water-soluble mixture of polyvinyl alcohol, a compatibilizing agent, and a sugar alcohol plasticizer that is a solid at room temperature, wherein the water-soluble film is substantially transparent.

First claim

What is claimed:

1. A water soluble film, consisting of a water soluble mixture of
a water soluble resin comprising polyvinyl alcohol, a modified polyvinyl alcohol, or a combination thereof, wherein the polyvinyl alcohol or modified polyvinyl alcohol is present in an amount in a range of about 35 to about 90 wt. %, based on the total weight of the film,
a compatibilizing agent selected from carboxymethyl cellulose (CMC), hydroxypropylated starch, and a combination thereof, a sugar alcohol plasticizer that is a solid at room temperature selected from the group consisting of isomalt, maltitol, sorbitol, xylitol, adonitol, and a combination thereof, and,
optionally one or more excipients selected from the group consisting of a plasticizer that is a liquid at room temperature, a surfactant, an antiblocking agent, and an internal release agent,
wherein the water soluble film is substantially transparent according to having an opacity of 37% or less for a 2.0 mm film, after storing for 30 days after film formation,
wherein the sugar alcohol plasticizer that is a solid at room temperature has a heat of fusion of 247 J/g or less and a concentration of 5 to 35 phr, and when the heat of fusion of a sugar alcohol plasticizer that is a solid at room temperature is greater than 192J/g then its concentration is 20 phr or less; and
wherein the water soluble polyvinyl alcohol or modified polyvinyl alcohol component of the film is characterized by a weight average molecular weight in a range of about 55,000 to about 80,000 g/mol.

2. The water soluble film of claim 1 , wherein the sugar alcohol plasticizer that is a solid at room temperature is included in an amount of about 20phr or less.

3. The water soluble film of claim 1 , wherein the sugar alcohol plasticizer that is a solid at room temperature is included in an amount of about 25 to about 35 phr and is characterized by a heat of fusion of about 192 J/g or less.

4. The water soluble film of claim 1 ,
wherein the compatibilizing agent is carboxymethyl cellulose;
wherein the sugar alcohol plasticizer that is a solid at room temperature comprises xylitol and a second sugar alcohol plasticizer that is a solid at room temperature; and
wherein the water soluble film, when 2.0 mils thick, dissolves in less than 50 seconds in water at 23° C.

5. The water soluble film of claim 1 , wherein the water soluble film has a tear strength of at least 400 g/mL.

6. The water soluble film of claim 4 , wherein the ratio of compatibilizing agent to xylitol is about 3:1.

7. The water soluble film of claim 1 , wherein the water soluble film is edible.

8. The water-soluble film of claim 1 , wherein the water soluble resin comprises polyvinyl alcohol.

9. The water soluble film of claim 8 , wherein the water soluble resin comprises polyvinyl alcohol with a degree of hydrolysis in a range of about 75% to about 99%.

10. The water soluble film of claim 1 , wherein the sugar alcohol plasticizer that is a solid at room temperature is included in the film an amount in a range of about 10 to about 25 parts per hundred parts resin (phr).

11. The water soluble film of claim 10 , wherein the sugar alcohol plasticizer that is a solid at room temperature comprises at least two sugar alcohol plasticizers that are solid at room temperature.

12. The water soluble film of claim 1 , wherein the sugar alcohol plasticizer that is a solid at room temperature is characterized by a heat of fusion of less than about 192 J/g.

13. The water soluble film of claim 1 , wherein the sugar alcohol plasticizer that is a solid at room temperature comprises a mixture of xylitol with at least one member of the group consisting of maltitol, sorbitol, and isomalt.

14. The water soluble film according to claim 1 , wherein the compatibilizing agent is carboxymethyl cellulose.

15. The water soluble film according to claim 14 , wherein the carboxymethyl cellulose has a degree of substitution in a range of about 0.6 to about 0.95.

16. The water soluble film of claim 1 , wherein the compatibilizing agent is included in the film in an amount in a range of about 10 to about 25 phr.

17. The water soluble film of claim 1 , wherein the ratio of compatibilizing agent to sugar alcohol plasticizer that is a solid at room temperature is about 2:1 to about 1:2.

18. The water soluble film of claim 1 , comprising a plasticizer that is a liquid at room temperature selected from the group consisting of glycerol, diglycerol, propylene glycol, ethylene glycol, diethyleneglycol, triethylene glycol, tetraethyleneglycol, polyethylene glycols up to MW 400, 2 methyl 1,3 propane diol and combinations of the forgoing.

19. The water soluble film according to claim 18 , wherein the plasticizer that is a liquid at room temperature is present in the film an amount in a range of about 25 to about 50 phr.

20. The water soluble film of claim 1 , comprising a surfactant.

21. The water soluble film according to claim 20 , wherein the surfactant is selected from the group consisting of dioctyl sodium sulfosuccinate, lactylated fatty acid esters of glycerol and propylene glycol, lactylic esters of fatty acids, sodium alkyl sulfates, polysorbate 20, polysorbate 60, polysorbate 65, polysorbate 80, lecithin, acetylated fatty acid esters of glycerol and propylene glycol, and acetylated esters of fatty acids, and combinations of any of the forgoing.

22. The water soluble film according to claim 21 , wherein the surfactant is present in the film in an amount of less than about 2 phr.

23. The water soluble film of claim 1 , wherein the film is heat sealable.

24. The water soluble film of claim 22 , wherein the film is thermoformable.

25. The water soluble film of claim 1 , wherein the film maintains a Δ% opacity of 2.0% or less for at least 4 days longer than an otherwise identical film having no compatibilizing agent.

26. An article, comprising a water soluble packet comprising a film of claim 1 .

27. The article of claim 26 , wherein the packet contains a food item.

28. The water soluble film of claim 1 , comprising a water soluble mixture of
polyvinyl alcohol, carboxymethylcellulose, xylitol, sorbitol, and glycerol;
wherein the ratio of carboxymethylcellulose to xylitol is about 3:1.

29. The water-soluble film of claim 1 , comprising one or more excipients selected from the group consisting of a plasticizer that is a liquid at room temperature, a surfactant, and an antiblocking agent.

Assignees

• Monosol Llc

Inventors

• Lee David M
• Childers Jennifer L

Classifications

• Y02A40/90

  in food processing or handling, e.g. food conservation · CPC title

• B65D65/463 Primary

  Edible packaging materials · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• C08L29/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C08L1/286 Primary

  substituted with acid radicals, e.g. carboxymethyl cellulose [CMC] (C08L1/282 takes precedence) · CPC title