Tail sealing and methods thereof

Patent metadata

Field	Value
Publication number	US-9382086-B2
Application number	US-201414319510-A
Country	US
Kind code	B2
Filing date	Jun 30, 2014
Priority date	Jun 30, 2014
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A method for bonding the tail of a convolutely wound log to the body is provided. The method comprises the use of a nonadhesive phase-change material to mechanically bond the tail to the wound log. The nonadhesive phase-change material is heated to an amorphous state prior to its application. Once applied to the wound log, the nonadhesive phase-change material mechanical bonds with the tail and wound log and as heat is lost, changes to a non-amorphous state. The mechanical bond can be selectively reversed through the application of a strength degradation accelerator.

First claim

What is claimed is:

1. A method for bonding a tail of a convolutely wound log of web material to the log, the method comprising:
providing a web material;
winding the web material into a convolutely wound log having a body and a tail;
providing a nonadhesive phase-change material in an amorphous phase;
applying the nonadhesive phase-change material in the amorphous phase to the web material at an application site proximate to the tail; and
wherein the nonadhesive phase-change material alters to a non-amorphous phase to create a bond between the tail and the body.

2. The method of claim 1 wherein the nonadhesive phase-change material degrades at between about 100° Celsius (C) and about 500° C. according to the Differential Scanning calorimetry Test Method.

3. The method of claim 1 wherein the nonadhesive phase-change material comprises a melting point between about 10° C. and about 65° C.

4. The method of claim 1 wherein the nonadhesive phase-change material comprises a heat capacity in the range of about 2 J/g·° C. to about 20 J/g·° C.

5. The method of claim 1 wherein the tail comprises
a first side substantially facing the body when the tail is associated with the body;
a second side opposite the first side; and
wherein the application site is located on the second side of the tail.

6. The method of claim 1 , further comprising:
providing an extruder comprising a plurality of outlets, wherein the extruder is configured to emit the nonadhesive phase-change material in the amorphous phase through the plurality of outlets; and wherein applying the nonadhesive phase-change material in the amorphous phase to the web material further comprises extruding the nonadhesive phase-change material.

7. The method of claim 6 , wherein the plurality of outlets comprises a pattern.

8. The method of claim 1 , further comprising
providing a print applicator; and
wherein applying the nonadhesive phase-change material in the amorphous phase to the web material further comprises using the print applicator to apply the nonadhesive phase-change material.

9. The method of claim 1 wherein the nonadhesive phase-change material comprises a color.

10. The method of claim 1 further comprising the step of accelerating a degradation of the strength of the nonadhesive phase-change material.

11. The method of claim 10 wherein accelerating the degradation of the strength of the nonadhesive phase-change material comprises applying a strength degradation accelerator.

12. The method of claim 10 wherein accelerating the degradation of the strength of the nonadhesive phase-change material comprises applying heat to the nonadhesive phase-change material.

13. The method of claim 1 wherein the bond has a tail release strength according to the Tail Release Strength Test Method and wherein the tail release strength of the bond at about 5 minutes is greater than or equal to about the tail release strength of the bond at about 15 hours.

14. The method of claim 1 wherein the bond is created by altering the nonadhesive phase-change material by one of the group consisting of a temperature change, a pressure change, vibrations, and combinations thereof.

15. A method for bonding a tail of a convolutely wound log of web material to the log, the method comprising:
providing a web material;
winding the web material into a convolutely wound log having a body and a tail;
providing a nonadhesive phase-change material in an amorphous phase;
applying the nonadhesive phase-change material in the amorphous phase to the web material at an application site proximate to the tail, wherein the nonadhesive phase-change material alters to a non-amorphous phase to create a bond between the tail and the body; and
subsequent to the creation of the bond between the tail and the body, accelerating a degradation of the strength of the bond.

16. The method of claim 15 , wherein the web material has a peak and a valley.

17. The method of claim 16 wherein the peak and the valley are disposed within the application site and wherein the maximum height distance between the peak and the valley is from about 180 μm to about 1750 μm.

18. The method of claim 17 wherein the peak and the valley are disposed within the application site and wherein the maximum height distance between the peak and the valley is from about 365 μm to about 780 μm.

19. The method of claim 15 wherein the nonadhesive phase-change material degrades at between about 100° C. and about 500° C. according to the Differential Scanning calorimetry Test Method.

20. The method of claim 15 wherein the nonadhesive phase-change material comprises a melting point between about 10° C. and about 65° C.

21. The method of claim 15 wherein the nonadhesive phase-change material comprises a heat capacity in the range of about 2 J/g·° C. to about 20 J/g·° C.

22. The method of claim 15 , wherein accelerating the degradation of the strength of the bond comprises applying heat to the nonadhesive phase-change material.

23. The method of claim 15 , wherein the nonadhesive phase-change material comprises a wax.

Assignees

• Procter & Gamble

Inventors

• Mellin Gustav Andre
• Biegger Eric Joseph
• Strain Victoria Grace
• Brokopp Jr Wesley Bernard
• Rasch David Mark
• Smith James Max

Classifications

• B65H2701/18484

  Diameter substantially equal to width, e.g. toilet paper roll · CPC title

• B65H75/28

  Arrangements for positively securing ends of material · CPC title

• B65H19/29 Primary

  Securing the trailing end of the wound web to the web roll (cores, formers, supports or holders, e.g. reels, with arrangements for securing ends of material B65H75/28) · CPC title

• B65H2301/414421

  Glue or hot-melt · CPC title

• B65H2301/414446

  Sealing or securing in a separate following station · CPC title