Granted Patent B2

US 12,280,573 · App. 18/106,099 · Granted Apr 22, 2025

Inventors: Stefano Bartolucci (Singapore, SG); Emily Charlotte Boswell (Cincinnati, OH); Su Anne Lee (Singapore, SG)

Assignee: The Procter & Gamble Company

B32B27/10B32B7/05B32B7/12B32B23/08B32B27/18B32B27/306B32B27/36B32B2250/24B32B2305/30B32B2307/31B32B2307/5825B32B2307/7163B32B2329/04B32B2367/00B32B2391/00B32B2439/06

Abstract

Claims (28)

1. A sachet product comprising a solid article comprising an open cell foam and an ultimate biodegradable sachet comprising a front film and a back film comprising:

a. a front middle layer and a back middle layer comprise a material selected from the group consisting of cellulose, cellulose acetate, metalized cellulose, metalized cellulose acetate, and combinations thereof;

b. a front inner layer joined to the front middle layer and a back inner layer joined to the back middle layer wherein the front inner layer and the back inner layer comprise a material selected from the group consisting of polyvinyl alcohol, polybutylene succinate, polybutylene succinate adipate, polyhydroxylalkonate, carnauba wax, a biodegradable thermo-plastic starch, polyvinylidene chloride, and combinations thereof;

wherein the sachet comprises a MVTR of from about 12 to about 800 g/sqm/day at 38° C. and 90% RH;

wherein the front inner layer and the back inner layer being permanently joined around a perimeter to form a seal, the seal forming a compartment adapted for storing the solid article wherein the open cell foam comprises:

a water-soluble polymer;

a surfactant selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, zwitterionic surfactants, and combinations thereof;

a Percent Open Cell Content of from about 80% to 100%;

an Overall Average Pore Size of from about 100 μm to about 2000 μm.

2. The sachet product of claim 1 , wherein the sachet is home compostable.

3. The sachet product of claim 1 , wherein after storage for a period of 2 weeks the sachet product can satisfy the Accelerated Stability Test.

4. The sachet product of claim 1 , wherein the sachet further comprises a front outer layer joined to the front middle layer and a back outer layer joined to the back middle layer; wherein the front outer layer and the back outer layer comprise paper having greater than 85% cellulose content.

5. The sachet product of claim 1 , wherein the front inner layer and/or the back inner layer comprises polybutylene succinate adipate and wherein the polybutylene succinate adipate is metalized.

6. The sachet product of claim 1 , further comprising a front biodegradable adhesive layer between the front middle layer and the front inner layer and a back biodegradable adhesive layer between the back middle layer and the back inner layer.

7. The sachet product of claim 1 , wherein the front film and the back film further comprise a front outer layer joined to the front middle layer and a back outer layer joined to the back middle layer wherein front outer layer and back outer layer comprise a biodegradable wax.

8. The sachet product of claim 7 , wherein the biodegradable wax is selected from the group consisting of beeswax, jojoba wax, carnauba wax, rapeseed wax, castor wax, candelilla wax, soy wax, palm oil wax, and combinations thereof.

9. The sachet product of claim 1 , wherein the inner layer material comprises polyvinyl alcohol and/or polyhydroxylalkonate.

10. The sachet product of claim 1 , wherein the sachet is recyclable.

11. The sachet product of claim 1 , wherein the sachet is a four-seal sachet.

12. The sachet product of claim 1 , wherein the sachet comprises a tear resistance of less than 550 nM.

13. The sachet product of claim 1 , wherein the seal comprises a seal strength of greater than 500 N/m.

14. The sachet product of claim 1 , where after 2 weeks of storage at 40° C., 75% RH the article comprises a Hand Dissolution value of less than 15 strokes and a final moisture content of from about 0.5% to about 25%.

15. The sachet product of claim 1 , wherein the front middle layer and back middle layer comprise a grammage of from about 30 to about 120 gsm.

16. The sachet product of claim 1 , wherein the front inner layer and the back inner layer comprise a thickness from about 3 μm to about 40 μm.

17. The sachet product of claim 1 , wherein the water-soluble polymer is selected from the group consisting of polyvinyl alcohols, polyvinylpyrrolidones, polyalkylene oxides, starch and starch derivatives, pullulan, gelatin, hydroxypropylmethylcelluloses, methycelluloses, carboxymethycelluloses, and combinations thereof.

18. The sachet product of claim 1 , wherein the front inner layer and the back inner layer comprise a grease resistance greater than 6.

19. The sachet product of claim 1 , further comprising an additional layer joined between the front middle layer and the front inner layer and an additional layer joined between the back middle layer and the back inner layer wherein the additional layers comprise an MVTR less than 300 g/m 2 /day at 38° C. and 98% RH.

20. The sachet product of claim 1 , comprising from about 10% to about 40%, by weight of the article, of the water-soluble polymer and from about 5% to about 80%, by total weight of the article, of the surfactant.

Continuity (3)

References Cited (400)