Looped pile film roll core

Patent metadata

Field	Value
Publication number	US-10029882-B2
Application number	US-201314432643-A
Country	US
Kind code	B2
Filing date	Sep 30, 2013
Priority date	Oct 4, 2012
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

The disclosure generally relates to a looped pile film roll core used for winding a polymeric film, a method of winding film on the looped pile film roll core, and a roll of film that includes the looped pile film roll core. The disclosure describes an article and a process to reduce the core impressions created by the starting end of a web on the adjacent web layers next to the core. In one particular embodiment, the present disclosure can lead to a reduction in the amount and severity of such core impressions on a wound polymeric film, by reducing the amount of stress in adjacent layers of wound web.

First claim

What is claimed is:

1. A film roll core, comprising:
a cylindrical tube having an outer surface; and
an engagement cover comprising a resilient looped pile fabric, the engagement cover disposed over the outer surface of the cylindrical tube covering substantially the entirety of the cylindrical surface of the cylindrical tube wherein the resilient looped pile fabric is a knit fabric comprising a base layer having first and second faces and a resilient looped pile protruding from the first face, the resilient looped pile fabric comprising a fiber having a size ranging from about 50 denier to about 500 denier and loops having a loop height from about 0.4 mm to about 3.0 mm; a film tangentially adjacent to the engagement cover.

2. The film roll core of claim 1 , wherein the base layer comprises a woven base layer, a knitted base layer, a non-woven base layer, or a combination thereof.

3. The film roll core of claim 1 , wherein the engagement cover attaches to the outer surface of the cylindrical tube by compression, adhesion, mechanical attachment, or a combination thereof.

4. The film roll core of claim 1 , wherein the resilient looped pile faces toward the outer surface of the cylindrical tube.

5. The film roll core of claim 1 , wherein the resilient looped pile faces away from the outer surface of the cylindrical tube.

6. The film roll core of claim 1 , wherein the engagement cover comprises a tube shape or a rectangle shape.

7. The film roll core of claim 1 , wherein the resilient looped pile fabric comprises a fibrous material selected from poly(tetrafluoroethylene), aramid, polyester, polypropylene, nylon, wool, bamboo, cotton, or a combination thereof.

8. The film roll core of claim 1 , wherein the engagement cover further comprises a material that shrinks when exposed to heat, moisture, or a combination thereof.

9. The film roll core of claim 8 , wherein the material that shrinks comprises wool, cotton, polyvinylalcohol (PVA), polyester, or a combination thereof.

10. The film roll core of claim 8 , wherein the material that shrinks comprises a fiber.

11. The film roll core of claim 1 , further comprising an adhesive disposed between at least a portion of the cylindrical tube and the engagement cover.

12. The film roll core of claim 1 , further comprising a hooked fastener disposed adjacent to at least one end of the outer surface of the cylindrical tube, thereby attaching the engagement cover to the cylindrical tube.

13. The film roll core of claim 1 , wherein the resilient looped pile fabric comprises a fiber having a size ranging from about 70 denier to about 200 denier.

14. The film roll core of claim 1 , wherein the resilient looped pile fabric comprises loops having a height from about 1.25 mm to about 2.7 mm.

15. The film roll core of claim 1 , wherein the cylindrical tube comprises a steel tube, and aluminum tube, a polymeric tube, a composite tube, or a paper tube.

16. A method of winding film, comprising:
disposing a film tangentially adjacent to a film roll core, the film roll core comprising:
a cylindrical tube having an outer surface;
an engagement cover comprising a resilient looped pile fabric, the engagement cover disposed over the outer surface of the cylindrical tube covering substantially the entirety of the cylindrical surface of the cylindrical tube wherein the resilient looped pile fabric is a knit fabric comprising a base layer having first and second faces and a resilient looped pile protruding from the first face, the resilient looped pile fabric comprising a fiber having a size ranging from about 70 denier to about 200 denier and loops having a loop height from about 0.4 mm to about 3.0 mm;
adhering the film to the engagement cover;
maintaining tension on the film; and
rotating the film roll core about a central axis, thereby winding the film onto the film roll core.

17. The method of claim 16 , wherein adhering the film comprises applying a single-sided adhesive tape to the film and to the engagement cover.

18. The method of claim 16 , wherein adhering the film comprises applying a double-sided adhesive tape between the film and the engagement cover.

19. A roll of film, comprising:
a film roll core comprising:
a cylindrical tube having an outer surface;
an engagement cover comprising a resilient looped pile fabric, the engagement cover disposed over the outer surface of the cylindrical tube covering substantially the entirety of the cylindrical surface of the cylindrical tube wherein the resilient looped pile fabric is a knit fabric comprising a base layer having first and second faces and a resilient looped pile protruding from the first face, the resilient looped pile fabric comprising a fiber having a size ranging from about 70 denier to about 200 denier and loops having a loop height from about 0.4 mm to about 3.0 mm; and
a web of film wound around the engagement cover,

wherein a first film edge of the web of film compresses the engagement cover such that subsequently wound layers of the web of film include minimal impressions of the first film edge and/or a transfer tape secured to the first film edge.

Assignees

• 3M Innovative Properties Co

Inventors

• Newhouse Kevin B
• Tait Bruce E
• Lee Terence A
• Smith Michael L
• Taggart Kyle
• Mann Stanley T
• Holmes Ronald L
• Edman Timothy J
• Reed Mark T
• Franke Carsten
• Tanley Chris J

Classifications

• B65H75/10 Primary

  without flanges, e.g. cop tubes · CPC title

• B65H2301/41427

  involving arrangements for securing leading edge to core, e.g. adhesive tape · CPC title

• B65H19/28

  Attaching the leading end of the web to the replacement web-roll core or spindle (cores, formers, supports or holders, e.g. reels, with arrangements for securing ends of material B65H75/28) · CPC title

• B65H2511/166

  relative to diameter, eccentricity or circularity · CPC title

• B65H2301/41428

  involving additional element between core and web · CPC title