Degradable materials and packaging made from same

Patent metadata

Field	Value
Publication number	US-11104497-B2
Application number	US-201515516667-A
Country	US
Kind code	B2
Filing date	Oct 2, 2015
Priority date	Oct 3, 2014
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

A water-soluble film, comprising a first water-soluble film, wherein the first water soluble film disintegrates in water within less than about 24 hours and dissolves in water within less than about 48 hours as measured by the MSTM-205 at 20° C. The disclosure provides a water-soluble film comprising a first water-soluble film that disintegrates in water within less than 24 hours and dissolves in water within less than 48 hours as measured by MSTM-205 at 20° C. The first water-soluble film optionally may be further characterized in that it does not disintegrate in water for at least about 1 hour and does not dissolve in water for at least about 1 hour as measured by MSTM-205 at 20° C. The disclosure further provides a water-soluble film comprising a first water-soluble film characterized in that the degradation and/or dissolution of the first water-soluble film is adapted to be activated by consumer handling.

First claim

What is claimed:

1. A laminate comprising a water-soluble film and a water-insoluble film, wherein:
the water-insoluble film comprises a blend of film-forming resins comprising a water-insoluble film-forming resin and a cold water-soluble film forming resin;
the water-insoluble film degrades within at most about 4 weeks as measured by the Compostability Test ASTM D6400-04;
the water-insoluble film does not degrade for at least about 2 weeks as measured by the Compostability Test ASTM D6400-04; and
the water-soluble film disintegrates in water in a time in a range of about 1 hour to less than about 24 hours and dissolves in water in a time in a range of about 1 hour to less than about 48 hours as measured by the MSTM-205 at 20° C.

2. The laminate of claim 1 , wherein the water-insoluble film comprises a water insoluble film-forming resin selected from the group consisting of polypropylene, polyisobutylene, polybut-1-ere, poly-4-methylpent-1-ene, polyvinylcyclohexane, polyisoprene, polybutadiene, cyclopentene, norbornene, high density polyethylene (HDPE), high density and high molecular weight polyethylene (HDPE-HMW), high density and ultrahigh molecular weight polyethylene (HDPE-UHMW), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), very low density polyethylene (VLDPE) and ultra-low density polyethylene (ULDPE), copolymers of monoolefins and diolefins with each other or with other vinyl monomers, propylene/but-1-ene copolymers, propylene/isobutylene copolymers, ethylene/but-1-ene copolymers, ethylene/hexene copolymers, ethylene/methylpentene copolymers, ethylene/heptene copolymers, ethylene/octene copolymers, ethylene/vinylcyclohexane copolymers, ethylene/cycloolefin copolymers (e.g. ethylene/norbornene like COO), ethylene/1-olefins copolymers, propylene/butadiene copolymers, isobutylene/isoprene copolymers, ethylene/vinylcyclohexene copolymers, ethylene/alkyl acrylate copolymers, ethylene/alkyl methacrylate copolymers, ethylene/vinyl acetate copolymers or ethylene/acrylic acid copolymers and their salts, terpolymers of ethylene with propylene and a diene, and combinations of the foregoing.

3. The laminate of claim 2 , wherein the water-insoluble film-forming resin is a cross-linked water-soluble film forming resin.

4. The laminate of claim 2 , wherein the water-insoluble film-forming resin comprises the continuous phase of the blend of water-insoluble film-forming resin and water-soluble film forming resin.

5. The laminate of claim 1 , wherein the water-insoluble film further comprises a degradation accelerator.

6. The laminate of claim 5 , wherein the degradation accelerator is encapsulated.

7. The laminate of claim 5 , wherein the degradation accelerator is dispersed within the water-insoluble film.

8. The laminate of claim 1 , wherein the laminate further comprises a second water-soluble film, wherein the second water-soluble film disintegrates in water within at most about 90 seconds and dissolves in water within at most about 120 seconds as measured by MSTM-205 at 20° C.

9. The laminate of claim 5 , wherein the degradation accelerator is provided on at least one side of the water-insoluble film.

10. The laminate of claim 9 , wherein the degradation accelerator is provided between the water-insoluble film and the water-soluble film.

11. The laminate of claim 5 , wherein the degradation accelerator is selected from the group consisting of a chemical degradation accelerator, heat forming agent, enzyme, UV degradation accelerator, oxidative degradation accelerator, microorganism, humidity degradation accelerator and combinations of the foregoing.

12. The laminate of claim 1 , wherein the water-insoluble film further comprises an agent for delayed degradation comprising an antioxidant, UV absorber, light stabilizer, or a combination of the foregoing.

13. The laminate of claim 1 , wherein a printed material is provided on the water-insoluble film as determined by the opacity test.

14. The laminate of claim 13 , wherein the printed material is characterized in that it has reduced visibility after about 1 month of exposure to sunlight.

15. The laminate of claim 1 , wherein the water-soluble film comprises one or more agents for delayed degradation selected from the group of an antioxidant, a UV absorber, and a light stabilizer.

Assignees

• Monosol Llc

Inventors

• Lee David M
• Childers Jennifer L
• Yeung Lee K
• Jenke Ken
• Knight Jonathon
• Zeese Nicholas
• Bening P Scott
• Parulekar Yashodhan S
• Kumar Sumeet

Classifications

• C11D17/042

  Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions · CPC title

• C08K3/014

  Stabilisers against oxidation, heat, light or ozone · CPC title

• C08K3/012

  Additives activating the degradation of the macromolecular compounds · CPC title

• C08J2329/00

  Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer · CPC title

• B65D75/30

  Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding · CPC title