Welded film and method of producing same
AssigneeAGC Inc.
InventorKoichi Oda
Life of this patent
Estimating the term…
Abstract
A welded film including, at least a first thermoplastic resin film, a second thermoplastic resin film, and a thermoplastic resin film for connection disposed so as to span between the first thermoplastic resin film and the second thermoplastic resin film, wherein the first thermoplastic resin film and the thermoplastic resin film for connection are welded at a first welded portion, and the second thermoplastic resin film and the thermoplastic resin film for connection are welded at a second welded portion, and the welded portions are separated by 2.0 mm or more, or each of the welded portions is separated from an end portion of the corresponding thermoplastic resin film among the two thermoplastic resin films; and a method of producing the welded film.
Claims15
A welded film, comprising:
- a first thermoplastic resin film;
- a second thermoplastic resin film;
- and
- a thermoplastic resin film for connection disposed so as to span between the first thermoplastic resin film and the second thermoplastic resin film, wherein:
- the first thermoplastic resin film and the thermoplastic resin film for connection are welded at a first welded portion, and the second thermoplastic resin film and the thermoplastic resin film for connection are welded at a second welded portion, a minimum distance between the first welded portion and the second welded portion being 10.0 mm or less, and
- a positional relationship between the first thermoplastic resin film or the second thermoplastic resin film, and the first welded portion or the second welded portion, satisfies at least one selected from the group consisting of the following (i) and (ii):
- (i) a minimum distance between an end portion of the first thermoplastic resin film at a side of the second thermoplastic resin film and the first welded portion is 0.5 mm or more;
- and
- (ii) a minimum distance between an end portion of the second thermoplastic resin film at a side of the first thermoplastic resin film and the second welded portion is 0.5 mm or more.
A welded film, comprising:
- a first thermoplastic resin film;
- a second thermoplastic resin film;
- and
- a thermoplastic resin film for connection disposed so as to span between the first thermoplastic resin film and the second thermoplastic resin film, wherein:
- the first thermoplastic resin film and the thermoplastic resin film for connection are welded at a first welded portion, and the second thermoplastic resin film and the thermoplastic resin film for connection are welded at a second welded portion, a minimum distance between the first welded portion and the second welded portion being 10.0 mm or less, and
- a positional relationship between the first welded portion and the second welded portion satisfies at least one selected from the group consisting of 0<(L1b/L1a)<0.99 and 0<(L2b/L2a)<0.99,
- wherein:
- L1b represents a width of the first welded portion,
- L1a represents a total length obtained by adding a minimum distance from an end portion of the first thermoplastic resin film, at a side of the second thermoplastic resin film, to the first welded portion, to the width L1b of the first welded portion,
- L2b represents a width of the second welded portion, and
- L2a represents a total length obtained by adding a minimum distance from an end portion of the second thermoplastic resin film, at a side of the first thermoplastic resin film, to the second welded portion, to the width L2b of the second welded portion.
Dependencies are inferred from the claim text.