Cover member and member supply assembly including same

Patent metadata

Field	Value
Publication number	US-12304716-B2
Application number	US-202017632676-A
Country	US
Kind code	B2
Filing date	Aug 6, 2020
Priority date	Aug 16, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A cover member of the present invention is a cover member to be placed on a face of an object to prevent passage of a foreign matter through an opening of the face, the cover member including: a protective membrane having a shape configured to cover the opening when the cover member is placed on the face; and a first substrate layer joined to one of principal surfaces of the protective membrane. The first substrate layer has a laminated structure including at least two substrate films, and is positioned between the protective membrane and the face when the cover member is placed on the face. The at least two substrate films include a non-foam film and a foam film. The cover member of the present invention is suitable for improving the peelability from a member supply sheet.

First claim

The invention claimed is:

1. A cover member to be placed on a face of an object to prevent passage of a foreign matter through an opening of the face, the cover member comprising:
a protective membrane having a shape configured to cover the opening when the cover member is placed on the face; and
a first substrate layer joined to one of principal surfaces of the protective membrane, wherein
the first substrate layer has a laminated structure including two non-foam films and a foam film, and is positioned between the protective membrane and the face when the cover member is placed on the face, and
wherein the foam film is positioned farther from the protective membrane than each of the two non-foam films.

2. The cover member according to claim 1 , wherein
the foam film is a substrate film.

3. The cover member according to claim 1 , wherein
the protective membrane has air permeability in a thickness direction.

4. The cover member according to claim 1 , wherein
the protective membrane includes a stretched porous polytetrafluoroethylene membrane.

5. The cover member according to claim 1 , wherein
the protective membrane has a cohesive force of 2.0 N/20 mm or less.

6. The cover member according to claim 1 , wherein
the first substrate layer has an outer periphery coinciding with an outer periphery of the protective membrane when viewed perpendicularly to the principal surface of the protective membrane.

7. The cover member according to claim 1 , further comprising
a second substrate layer including at least one substrate film, wherein
the second substrate layer is joined to the other principal surface of the protective membrane such that the second substrate layer and the first substrate layer sandwich the protective membrane therebetween.

8. The cover member according to claim 7 , wherein
the second substrate layer includes, as the substrate film, only a non-foam film.

9. The cover member according to claim 7 , wherein
a substrate film included in the first substrate layer and positioned closest to the protective membrane has the same structure as the substrate film included in the second substrate layer and positioned closest to the protective membrane, and
wherein the substrate film included in the first substrate layer is one of the two non-foam films.

10. The cover member according to claim 7 , wherein
the second substrate layer has an outer periphery coinciding with an outer periphery of the protective membrane as viewed perpendicularly to the principal surface of the protective membrane.

11. The cover member according to claim 1 , further comprising
a tab film placed on an outermost layer of the cover member, the outermost layer being positioned farthest from the face when the cover member is placed on the face, wherein
the tab film has a portion protruding outward more than an outer periphery of the outermost layer when viewed perpendicularly to a principal surface of the outermost layer.

12. A member supply assembly comprising:
a member supply sheet; and
a cover member placed on the member supply sheet, wherein
the cover member is the cover member according to claim 1 , and
the first substrate layer of the cover member faces the member supply sheet.

13. The member supply assembly according to claim 12 , being band-shaped and wound to form a wound body.

Assignees

• Nitto Denko Corp

Inventors

• SUGAYA Yosuke
• Kigami Hiroki

Classifications

• C09J2467/006

  in the substrate · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C09J2423/046

  in the substrate · CPC title

• B65H2701/1842

  of webs · CPC title

• B65H18/28

  Wound package of webs · CPC title