Stock material or miscellaneous articles – Layer or component removable to expose adhesive
Patent
1997-07-21
2000-01-11
Ahmad, Nasser
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
428 421, 428 95, 428 96, 428137, 4283144, 4283148, 4283171, 4283175, B32B 518
Patent
active
060133422
DESCRIPTION:
BRIEF SUMMARY
The present invention refers generally to a self-adhesive sheet and more particularly to such a sheet having anti-slip and acoustic properties, which is suitable, for example, for using as a non-slip underlay or liner for carpets, rugs, mats and the like.
BACKGROUND OF THE INVENTION
It is known to apply a layer of open cell thermoplastic foam to the underside of carpets to provide them with non-slip properties. A specific example is the liner disclosed in DE 1560752) (D-S Chemie & Co.). Anti-slip liners are also known which are in the form of open screens and may be stitched to the underside of carpets, as also is a composite liner having outer layers sandwiching a layer of Kraft paper (JP 5237974 in the name of Kanzaki Manufacturing Co. Ltd.). A liner of natural or synthetic latex foam applied directly to the underside of carpets is also known from DE 2028624 (Centrans GmbH).
SUMMARY OF THE INVENTION
The present invention seeks another more universal solution for providing carpets and the like with non-slip properties, by means of a multi-use self-adhesive sheet that comprises a base sheet having first and second sides, a coating of natural or synthetic material having non-slip characteristics adhered to the first side of the base sheet, a self-adhesive coating applied to the second side of the base sheet and a protector sheet covering the adhesive coating and peelable therefrom to make the sheet self-adhesive.
The base sheet may be made of any suitable material but preference is given to a woven polypropylene screen due to its low cost, its bi-directional resistance to stretching and its reduced weight. Other materials include nylon cloth, gabardine or polyester, poplin, Ketsturn or Raschel cloth and, in general, strong light weaves of suitable widths, such as 2.40 to 5.00 m.
The thickness of the sheet may vary, it generally being between 0.15 and 0.35 mm. More particularly, thickness would be: white screen--preferably 0.20 mm, but in general between 0.15 and 0.25 mm; cotton--0.25 to 0.30 mm; and other materials--in the larger range mentioned above, depending on the properties of the material and the characteristics desired for the product.
Although the base sheet may be a continuous sheet, it may adequately be in the form of an open grid or net which reduces cost without any substantial loss in efficiency of the final product. The materials may be the same as those mentioned above.
Although the coating of non-slip material may be in any suitable form, foams and particularly closed cell foams are preferred. Natural or synthetic latex is suitable. The coating may be provided (for example, by means of engraving rolls) with a relief, preferably grid-like, pattern which results in both a relatively bodied structure in relation to the quantity of latex employed and an agreeable appearance. The thickness of the foam coating may be small, for example, between 1.0 and 2.5 mm.
When the base sheet is itself an open grid-like net of polypropylene or the like, the foam coating will adhere to the first side of the individual grid elements and, since there are spaces therebetween, the foam will automatically assume an open grid configuration itself which corresponds to the grid of the base sheet.
The protector sheet would normally be paper having suitable strength and thickness, the latter being typically between 0.15 and 0.25 mm. The weight of the paper is suitably between 40 and 60 g/m.sup.2.
The adhesive may have a thickness in the range of approximately 0.05 to 0.08 mm and a weight of 40 to 60 g/m.sup.2. It preferably comprises an acrylic adhesive such as is available from 3M (Minnesota Mining and Manufacturing Company) or BASF.
A self-adhesive sheet having the above mentioned preferred properties is light (in the general range of about 500 to 800 g/m.sup.2 when the base sheet is a continuous sheet) and flexible and it may be marketed in sheets or rolls which are easily cut by scissors or the like so as to obtain the desired size or shape and, once the protector sheet has been peeled off, it may be adhered t
REFERENCES:
patent: 3583890 (1971-06-01), Klockmann
patent: 4522857 (1985-06-01), Higgins
patent: 4578300 (1986-03-01), Merlet
patent: 4647484 (1987-03-01), Higgins
patent: 4705715 (1987-11-01), DeCoste, Jr. et al.
patent: 4824498 (1989-04-01), Goodwin
patent: 4990399 (1991-02-01), Hoopengardner
Ahmad Nasser
Industria E Comercio Textil Avanti Ltda.
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