Composite facestocks

• US 6,627,283 B1
• Filed: 12/05/1997
• Issued: 09/30/2003
• Est. Priority Date: 02/05/1985
• Status: Expired due to Fees

• Current Assignee: Avery Dennison Corporation
• Original Assignee: Avery Dennison Corporation
• Inventors: Freedman, Melvin S.
• Primary Examiner(s): Ahmad, Nasser
• Application Number:
  US08/985,443
• Time in Patent Office: 2,125 Days
• Field of Search: 428/41.3, 428/41.5, 428/40.1, 428/42.1, 428/516, 428/518, 428/520, 428/522
• US Class Current: 428/40.1
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/19 the layers being joined at their edges
• CPC Class Codes: B29K 2995/0072 Roughness, e.g. anti-slip
• CPC Class Codes: B29K 2995/0081 Tear strength
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: C09J 2203/334 as a label
• CPC Class Codes: C09J 2301/162 the carrier being a laminate constituted by plastic layers only
• CPC Class Codes: C09J 2301/302 the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
• CPC Class Codes: C09J 2423/006 in the substrate
• CPC Class Codes: C09J 2427/006 in the substrate
• CPC Class Codes: C09J 2431/006 in the substrate
• CPC Class Codes: C09J 7/243 Ethylene or propylene polymers
• CPC Class Codes: C09J 7/245 Vinyl resins, e.g. polyvinyl chloride [PVC]
• CPC Class Codes: G09F 2003/0257 Multilayer
• CPC Class Codes: G09F 3/02 Forms or constructions layered products B32B
• CPC Class Codes: Y10S 428/91 Product with molecular orientation
• CPC Class Codes: Y10T 156/1023 Surface deformation only [e.g., embossing]
• CPC Class Codes: Y10T 156/108 Flash, trim or excess removal
• CPC Class Codes: Y10T 428/14 : Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/1452 : Polymer derived only from ethylenically unsaturated monomer
• CPC Class Codes: Y10T 428/1462 : Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof [e.g., acrylamide, acrylate ester, etc.]
• CPC Class Codes: Y10T 428/1476 : Release layer
• CPC Class Codes: Y10T 428/1486 : Ornamental, decorative, pattern, or indicia
• CPC Class Codes: Y10T 428/1495 : Adhesive is on removable layer
• CPC Class Codes: Y10T 428/24521 : with component conforming to contour of nonplanar surface
• CPC Class Codes: Y10T 428/2486 : with outer strippable or release layer
• CPC Class Codes: Y10T 428/2495 : Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/24967 : Absolute thicknesses specified
• CPC Class Codes: Y10T 428/24975 : No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/26 : Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/28 : Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2839 : with release or antistick coating
• CPC Class Codes: Y10T 428/2848 : Three or more layers
• CPC Class Codes: Y10T 428/31 : Surface property or characteristic of web, sheet or block
• CPC Class Codes: Y10T 428/31855 : Of addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31909 : Next to second addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31913 : Monoolefin polymer
• CPC Class Codes: Y10T 428/3192 : Next to vinyl or vinylidene chloride polymer
• CPC Class Codes: Y10T 428/31928 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31935 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31938 : Polymer of monoethylenically unsaturated hydrocarbon

Abstract

Film-forming means are coextruded to form all plastic multilayer liners and facestocks for pressure-sensitive labels, tapes, decals, signs, bumper stickers, and other products formed from sheet and roll stock. Fill means in a charge for the liner coextrusion affects stiffness and dimensional stability of the liner and/or affects the roughness of a liner face or faces. The film materials of the layers of the constructions are selected according to the cost/benefit characteristics of candidate materials considering the functional or operational requirements of the layer in question.

Claims

1. A die-cuttable and matrix-strippable multilayer film facestock having an overall thickness of from 1.5 mils to about 6.5 mils for use in pressure-sensitive adhesive label applications comprising a coextrudate of at least two layers comprising a base layer and at least one skin layer wherein the base layer is thicker than the skin layer, said coextrudate having a face side, said base layer comprising a polyethylene having a density of from 0.89 to 0.965 free of filler particles, and having a stiffness of from about 10 to 100 Gurley, and said skin layer being on the face side of the coextrudate and having an ink-printable surface,

wherein the ink-printable surface of the skin layer is corona treated.

2. A die-cuttable and matrix-strippable multilayer film facestock having an overall thickness of from 1.5 mils to about 6.5 mile for use in pressure-sensitive adhesive label applications comprising a coextrudate of at least two layers comprising a base layer and at least one skin layer wherein the base layer is thicker than the skin layer, said coextrudate having a face side, said base layer comprising a polyethylene having a density of from 0.89 to 0.965 free of filler particles, and having a stiffness of from about 10 to 100 Gurley, and said skin layer being on the face side of the coextrudate and having an ink-printable surface,

wherein the ink-printable surface of the skin layer is glossy.

3. A die-cuttable and matrix-strippable multilayer film facestock having an overall thickness of from 1.5 mils to about 6.5 mils for use in pressure-sensitive adhesive label applications comprising a coextrudate of cojoined layers having a face side and comprising a relatively thick core or base layer of polyethylene having a density of from 0.89 to 0.965 free of filler particles and having a stiffness of from about 10 to 100 Gurley which provides said facestock with a degree of dimensional stability and stiffness suitable for the labels cut or formed from the facestock, and at least one relatively thin skin layer, said skin layer being on the face side of the coextrudate and having an ink-printable surface,

wherein the ink-printable surface of the skin layer is corona treated.

4. A die-cuttable and matrix-strippable multilayer film facestock having an overall thickness of from 1.5 mils to about 6.5 mils for use in pressure-sensitive adhesive label applications comprising a coextrudate of cojoined layers having a face side and comprising a relatively thick core or base layer of polyethylene having a density of from 0.89 to 0.965 free of filler particles and having a stiffness of from about 10 to 100 Gurley which provides said facestock with a degree of dimensional stability and stiffness suitable for the labels cut or formed from the facestock, and at least one relatively thin skin layer, said skin layer being on the face side of the coextrudate and having an ink-printable surface,

wherein the ink-printable surface of the skin layer is glossy.

5. A die-cuttable and matrix-strippable multilayer facestock having an overall thickness of from 1.5 mils to about 6.5 mils for use in pressure-sensitive label application comprising a coextrudate of cojoined layers having a face side and comprising a relatively thick core or base layer of polyethylene having a density of from 0.89 to 0.965 which is free of filler particles, and at least one relatively thin skin layer, said skin layer being on the face side of the coextrudate and having an ink-imprintable surface, and the stiffness of the facestock is greater than 10 Gurley,

wherein the ink-printable surface of the skin layer is corona treated.

6. A die-cuttable and matrix-strippable multilayer facestock having an overall thickness of from 1.5 mils to about 6.5 mils for use in pressure-sensitive label application comprising a coextrudate of cojoined layers having a face side and comprising a relatively thick core or base layer of polyethylene having a density of from 0.89 to 0.965 which is free of filler particles, and at least one relatively thin skin layer, said skin layer being on the face side of the coextrudate and having an ink-imprintable surface, and the stiffness of the facestock is greater than 10 Gurley,

wherein the ink-printable surface of the skin layer is glossy.

7. A die-cuttable and matrix-strippable multilayer film facestock having an overall thickness of from 1.5 mils to about 6.5 mils for use in pressure-sensitive adhesive label applications comprising a multilayer film of at least three layers, said multilayer film formed from a coextrudate and comprising first and second skin layers and a core, said core having a face side and a back side and comprising a polyethylene having a density of from 0.89 to 0.965 which is free of filler particles, said core being thicker than either said first skin layer or said second skin layer and having a stiffness of from between 10 and 100 Gurley, said first skin layer being on the face side of said film and preselected to provide an ink-printable skin, and said second skin layer being on the back side of the core and being preselected to provide for pressure-sensitve adhesive anchorage,

wherein the ink-printable surface of the first skin layer is corona treated.

8. A die-cuttable and matrix-strippable multilayer film facestock having an overall thickness of from 1.5 mils to about 6.5 mils for use in pressure-sensitive adhesive label applications comprising a multilayer film of at least three layers, said multilayer film formed from a coextrudate and comprising first and second skin layers and a core, said core having a face side and a back side and comprising a polyethylene having a density of from 0.89 to 0.965 which is free of filler particles, said core being thicker than either said first skin layer or said second skin layer and having a stiffness of from between 10 and 100 Gurley, said first skin layer being on the face side of said film and preselected to provide an ink-printable skin, and said second skin layer being on the back side of the core and being preselected to provide for pressure-sensitive adhesive anchorage,

wherein the ink-printable surface of the first skin layer is glossy.