Three-dimensional flexible adhesive film structures
First Claim
Patent Images
1. A three dimensional flexible film structure comprising:
- (A) a flexible polymer face film having a front surface and a back surface, (B) an adhesive layer having a front surface and a back surface wherein the front surface of the adhesive layer is in contact with and adhered to the back surface of the flexible polymer face film, and (C) a patterned layer of a non-adhesive material having a front surface and a back surface and containing one or more areas free of non-adhesive material wherein the front surface of the layer of non-adhesive material is in contact with and adhered to the back surface of the adhesive layer, and wherein the structure comprises at least one area having one or more, three-dimensional hollow protrusions extending outwardly from the front surface of the face film, and at least one area having one or more three-dimensional depressions extending inwardly from the back surface of the adhesive layer, said depressions corresponding to said one or more hollow protrusions on the front surface of the face film, and the area or areas in the non-adhesive layer which are free of non-adhesive material are within the three-dimensional depression or depressions in the back surface of the adhesive layer.
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Abstract
Three-dimensional flexible adhesive film structures are described which exhibit tack on demand characteristics. The film is capable of showing minimal or no tack under normal handling conditions, but when pressed against a target surface, exhibits the desired adhesion.
93 Citations
82 Claims
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1. A three dimensional flexible film structure comprising:
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(A) a flexible polymer face film having a front surface and a back surface, (B) an adhesive layer having a front surface and a back surface wherein the front surface of the adhesive layer is in contact with and adhered to the back surface of the flexible polymer face film, and (C) a patterned layer of a non-adhesive material having a front surface and a back surface and containing one or more areas free of non-adhesive material wherein the front surface of the layer of non-adhesive material is in contact with and adhered to the back surface of the adhesive layer, and wherein the structure comprises at least one area having one or more, three-dimensional hollow protrusions extending outwardly from the front surface of the face film, and at least one area having one or more three-dimensional depressions extending inwardly from the back surface of the adhesive layer, said depressions corresponding to said one or more hollow protrusions on the front surface of the face film, and the area or areas in the non-adhesive layer which are free of non-adhesive material are within the three-dimensional depression or depressions in the back surface of the adhesive layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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12. A three dimensional flexible film structure comprising:
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(A) a flexible polymer face film having a front surface and a back surface, (B) an adhesive layer having a front surface and a back surface wherein the front surface of the adhesive layer is in contact with and adhered to the back surface of the flexible polymer face film, and (C) a patterned layer of a non-adhesive material having a front surface and a back surface and containing one or more areas free of non-adhesive material wherein the front surface of the layer of non-adhesive material is in contact with and adhered to the back surface of the adhesive layer, and wherein the structure comprises at least one area having a plurality of spaced three-dimensional hollow protrusions extending outwardly from the front surface of the face film, and at least one area having a plurality of spaced three-dimensional depressions extending inwardly from the back surface of the adhesive layer, said depressions corresponding to said plurality of hollow protrusions on the front surface of the face film, and the areas in the non-adhesive layer which are free of non-adhesive material are within the three-dimensional depressions in the back surface of the adhesive layer.
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22. A three dimensional flexible film structure comprising:
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(A) a flexible polymer face film having a front surface and a back surface, (B) an adhesive layer having a front surface and a back surface wherein the front surface of the adhesive layer is in contact with and adhered to the back surface of the flexible polymer face film, and (C) a patterned layer of a non-adhesive material having a front surface and a back surface wherein the front surface of the layer of non-adhesive material is in contact with and adhered to the back surface of a portion of the adhesive layer, and wherein the structure comprises at least one area having a plurality of spaced three-dimensional hollow protrusions extending outwardly from the front surface of the face film and separated from each other by valleys, and at least one area having a plurality of spaced three-dimensional depressions extending inwardly from the back surface of the adhesive layer, said depressions corresponding to said plurality of spaced hollow protrusions on the front surface of the face film, and the front surface of the non-adhesive layer in contact with a portion of the back surface of the adhesive layer is in contact with and adhered to at least the portion of the adhesive adhered to the back surface of the face film in the valleys, provided that at least a portion of the back surface of the adhesive layer within the depressions is free of the non-adhesive material. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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35. A three-dimensional flexible film structure comprising:
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(A) a coextrudate comprising;
(A-1) a flexible polymer face film having a front surface and a back surface, and (A-2) an adhesive layer having a front surface and a back surface wherein the front surface of the adhesive layer is in contact with and >
adhered to the back surface of the flexible polymer face film,(B) a patterned layer of a non-adhesive material having a front surface and a back surface and containing a plurality of areas which are free of non-adhesive material, wherein the structure comprises at least one area having a plurality of spaced three-dimensional hollow protrusions extending outwardly from the front surface of the face film and separated from each other by valleys, and at least one area having a plurality of spaced three-dimensional depressions extending inwardly from the back surface of the adhesive layer, said depressions corresponding to said plurality of hollow protrusions, and the front surface of the patterned non-adhesive material is in contact with and adhered to at least the back surface of the portion of the adhesive layer which is adhered to the back surfaces of the face film in the valleys, and the areas in the non-adhesive layer which are free of non-adhesive material are within the depressions.
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53. A process of preparing a three-dimensional flexible film structure which comprises:
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(A) providing a molten coextrudate comprising;
(A-1) a continuous polymer face film having an front surface and a back surface, and (A-2) an adhesive layer having a front surface and a back surface wherein the front surface of the adhesive layer is in contact with and adhered to the back surface of the polymer face film, (B) cooling the coextrudate, (C) applying a patterned layer of a non-adhesive material having a front surface and a back surface to the back surface of the adhesive layer whereby the front surface of the patterned layer of non-adhesive material is in contact with and adhered to a portion of the back surface of the adhesive layer, said patterned layer containing areas free of non-adhesive material, thereby producing a composite of the face film, adhesive layer, and non-adhesive layer, and (D) forming said composite to create a plurality of spaced hollow three-dimensional protrusions extending outwardly from the front surface of the polymer face film and separated from each other by valleys and a plurality of three-dimensional depressions in the opposite surface of the composite whereby the patterned layer of non-adhesive material is adhered to at least the back surface of the portion of the adhesive layer which is adhered to the back surfaces of the face film in the valleys, and the areas in the non-adhesive layer which are free of non-adhesive are within the depressions. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82)
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68. A process of preparing a three-dimensional flexible film structure which comprises:
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(A) providing a molten coextrudate comprising;
(A-1) a continuous polymer face film having an front surface and a back surface, and (A-2) an adhesive layer having a front surface and a back surface wherein the front surface of the adhesive layer is in contact with and adhered to the back surface of the polymer face film, (B) cooling the molten coextrudate, (C) forming said coextrudate to create a plurality of spaced hollow three-dimensional protrusions extending outwardly from the front surface of the polymer face film and a plurality of three-dimensional depressions in the back surface of the adhesive layer corresponding to the plurality of hollow protrusions on the front surface of the face film, wherein the protrusions on the face film are separated from each other by valleys, and (D) applying a patterned layer of non-adhesive material to the back surface of the portion of the adhesive layer which adhered to the back surfaces of the face film in the valleys.
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Specification