Discontinuously laminated film structures with improved visual characteristics
In one example embodiment, a laminated film includes an extruded ribbed first film portion that includes multiple ribs, where consecutive ribs are separated by webs that are integral with the ribs. The laminated film also includes an un-ribbed second film portion, and a region of discontinuous lamination between the first film portion and the second film portion. The region of discontinuous lamination includes multiple regions where the first and second film portions are bonded together, and multiple regions where the first and second film portions are not bonded together.
1. A laminated film, comprising:
a first film that includes a plurality of extruded ribs, wherein consecutive extruded ribs are separated by webs that are integral with the extruded ribs, wherein the first film includes a plurality of thinner stretched linear areas that alternate with a plurality of thicker linear areas, wherein the thinner stretched linear areas and the thicker linear areas are formed in the webs and extruded ribs of the first film;
a second film that is devoid of extruded ribs; and
discontinuous lamination between the first film and the second film, the discontinuous lamination comprising:
a plurality of regions where the first and second films are bonded together; and
a plurality of regions where the first and second films are not bonded together.
2. The laminated film of claim 1 , wherein the extruded ribs are substantially parallel to a machine direction.
3. The laminated film of claim 1 , wherein the thinner stretched linear areas and the thicker linear areas extend orthogonally to the extruded ribs of the first film.
4. The laminated film of claim 1 , wherein the first film has a first color, and the second film has a second color that is different from the first color.
5. The laminated film of claim 1 , wherein there is a visible contrast between the extruded ribs and the webs of the first film, and the visible contrast is at least one of: a contrast in color; or a contrast in intensity of color.
6. The laminated film of claim 1 , further comprising indicia perceptible by a user, the indicia comprising one or more of:
indicia that are substantially cosmetic in nature; or
indicia that convey information concerning a property of the laminated film.
7. The laminated film of claim 6 , wherein the indicia identify areas of localized stress concentration.
8. A laminated film, comprising:
a first film that includes:
a plurality of extruded ribs separated by webs, wherein there is a visible contrast between the extruded ribs and the webs, and the visible contrast comprises one or more of: a contrast in color, or a contrast in intensity of color, wherein the extruded ribs are parallel to a machine direction, and the first film includes a plurality of thinner stretched linear areas that alternate with a plurality of thicker linear areas, wherein the thinner stretched linear areas and the thicker linear areas are formed in the webs and extruded ribs of the first film and extend orthogonally to extruded ribs of the first film; and
a stress-sensitive agent;
a second film; and
discontinuous lamination between the first film and the second film, the discontinuous lamination comprising:
a plurality of regions where the first and second films are bonded together; and
a plurality of regions where the first and second films are not bonded together.
9. The laminated film of claim 8 , wherein the stress-sensitive agent comprises one of a coloring agent, and a voiding agent.
10. The laminated film of claim 8 , wherein the stress-sensitive agent is a voiding agent.
11. The laminated film of claim 8 , wherein the second film is white or black.
12. The laminated film of claim 8 , wherein all of the thinner stretched linear areas and the thicker linear areas extend orthogonally to the extruded ribs of the first film.
13. The laminated film of claim 8 , wherein the first film comprises a plurality of layers of linear low-density polyethylene (LLDPE).
14. A plastic product at least partly constructed from the laminated film of claim 1 , wherein the plastic product comprises one of a grocery bag, a trash bag, a sack, a yard waste bag, packaging materials, a feminine hygiene product, a baby diaper, and adult incontinence product, a sanitary napkin, a bandage, a food storage bag, a food storage container, a thermal heat wrap, a facial mask, a cleaning wipe, and a hard surface cleaner.
15. The laminated film of claim 1 , wherein:
the webs of the first layer are transparent;
the extruded ribs of the first layer are a first color;
the second layer is a second color; and
when looking at the first layer side of the laminated film, the webs of the first layer appear a third color that differs from the first color and the second color.
16. The laminated film of claim 15 , wherein:
the extruded ribs are white;
the second layer is black; and
the webs of the first layer appear silver or a grey metallic.
17. The laminated film of claim 15 , wherein:
the extruded ribs are black;
the second layer is white; and
the webs of the first layer appear silver or a grey metallic.
18. The laminated film of claim 8 , wherein:
the webs of the first layer are transparent;
the extruded ribs of the first layer are a first color;
the second layer is a second color; and
when looking at the first layer side of the laminated film, the webs of the first layer appear a third color that differs from the first color and the second color.
19. The laminated film of claim 18 , wherein:
the extruded ribs are white;
the second layer is black; and
the webs of the first layer appear silver or a grey metallic.
20. The laminated film of claim 18 , wherein:
the extruded ribs are black;
the second layer is white; and
the webs of the first layer appear silver or a grey metallic.