Peel and stick stretch wrap

• US 20080173389A1
• Filed: 01/22/2007
• Published: 07/24/2008
• Est. Priority Date: 01/22/2007
• Status: Active Grant

• Current Assignee: BMIC LLC
• Original Assignee: Building Materials Investment Corporation (Standard Industries Holdings, Inc.)
• Inventors: Mehta, Vinay, Chetan, Makam S., Kerkar, Av
• Granted Patent: US 7,740,928 B2
• Time in Patent Office: Days
• US Class Current: 156/160
• CPC Class Codes: C09J 2301/18 characterized by perforations in the adhesive tape
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/141 Bituminous
• CPC Class Codes: Y10T 428/1452 Polymer derived only from ethylenically unsaturated monomer
• CPC Class Codes: Y10T 428/1486 Ornamental, decorative, pattern, or indicia
• CPC Class Codes: Y10T 428/21 Circular sheet or circular blank
• CPC Class Codes: Y10T 428/216 Ornamental, decorative, pattern, or indicia
• CPC Class Codes: Y10T 428/218 Aperture containing
• CPC Class Codes: Y10T 428/24273 including aperture
• CPC Class Codes: Y10T 428/24298 Noncircular aperture [e.g., slit, diamond, rectangular, etc.]
• CPC Class Codes: Y10T 428/31 Surface property or characteristic of web, sheet or block

Abstract

A paper or plastic surface material of appropriate thickness and stiffness which can be coated with or laminated to asphaltic or non-asphaltic adhesives. The surface material can have a plurality of individual slits formed in substantially parallel spaced rows extending transversely from one end to the opposing end of the surface material. The flexible surface material is expandable by extending the opposing ends of the surface material whereby the slits form an array of openings. The length, width and spacing of the cuts can be varied to achieve desired stretch ratios. The surface material can be easily stored in the non-expandable position and easily expanded to be stretchable and conformable around windows, skylights or other suitable uses.

Claims

1. A stretch wrap, comprising:

a surface material having a length, width and thickness; and

one or more slits that extend throughout the thickness of the surface material;

wherein the slits allow the surface material to stretch without tearing when the material is extended in a lengthwise or widthwise direction.

2. The stretch wrap of claim 1, wherein the surface material is comprised of a paper, plastic, metal foil, laminate, composite or a combination of such.

3. The stretch wrap of claim 1, further comprising:

a release film attached to an adhesive on a bottom of the surface material.

4. The stretch wrap of claim 3, wherein said adhesive is selected from the group consisting of a SEBS compound, 5BS compound, APP modified bituminous compound, butyl rubber compound, single component PVAc (polyvinyl acetate) water-resistant adhesive, water-resistant polyvinyl acetate adhesive, EVA (ethylene vinyl acetate)-hot melt adhesives, pressure sensitive hot melt adhesive atactic polypropylene (APP) base pressure sensitive tapes, polyurethane adhesives, thermoplastic adhesive film based with co-polyamides, thermoplastic adhesive film based with mixed polyolefin and co-polyamide, animal base adhesive, asphaltic base adhesive styrol or verstat acrylate types, and neoprene rubber cementic base adhesive.

5. The stretch wrap of claim 3, wherein the adhesive can be UV-resistant or have UV resistance enhancing additives.

6. The stretch wrap of claim 1, wherein the surface material has substantially parallel rows of slits in a machine direction.

7. The stretch wrap of claim 1, wherein the surface material has substantially parallel rows of slits in a cross-machine direction.

8. The stretch wrap of claim 7, wherein the slits in each substantially parallel row are partially staggered with respect to adjacent parallel rows.

9. The stretch wrap of claim 7, wherein the slits in each substantially parallel row are fully staggered with respect to adjacent parallel rows.

10. The stretch wrap of claim 1, wherein the surface material has substantially parallel rows of slits, wherein each row has a pattern having a slit in a machine direction followed by a slit in a cross-machine direction, followed by a slit in a machine direction.

11. The stretch wrap of claim 1, wherein the surface material has substantially parallel rows of slits at an angle with respect to an axis in the machine direction.

12. The stretch wrap of claim 11, wherein the slits in each substantially parallel row are partially staggered with respect to adjacent parallel rows.

13. The stretch wrap of claim 11, wherein the slits in each substantially parallel row are fully staggered with respect to adjacent parallel rows.

14. The stretch wrap of claim 11, wherein the angle of the slits is between 0-90 degrees with respect to the axis in the machine direction.

15. The stretch wrap of claim 14, wherein the angle of the slits is approximately 45 degrees.

16. The stretch wrap of claim 11, wherein each row has slits at an angle opposite the adjacent rows with respect to an axis in the machine direction.

17. The stretch wrap of claim 1, wherein the slits are formed in a non-linear profile.

18. A method of applying a stretch wrap, the method comprising:

peeling a release film off a bottom side of a surface material thus exposing an adhesive on the bottom side of the surface material, the surface material having a length, width thickness, and one or more slits that extend throughout the thickness of the surface material; and

applying the surface material to a border, the surface material being stretchable and conforming to the shape of the border;

wherein the slits allow the surface material to stretch without tearing when the surface material is extended in a lengthwise and/or widthwise direction.

19. The method of applying a stretch wrap of claim 18, wherein the stretchability of the stretch wrap is determined by a suitable combination of slit length, spacing between the slits, distance between adjacent rows of slits, extent of staggering of adjacent rows, and angle of slits with respect to the machine direction.