Multi-layer, substantially polyvinyl chloride- and polyolefin-free composite film

Abstract

The invention relates to a multilayer composite foil substantially free from polyvinyl chloride and polyolefins, more particularly a furniture foil, comprising ABS, especially ABS with admixtures, and/or polystyrene, especially polystyrene with admixtures and/or high shock-resistant polystyrene, and/or polyester, especially amorphous polyester copolymer, wherein a maximum tensile force ranging between 30 and 280 Newton is attained during a uniaxial tensile test of one test body consisting of the composite foil, wherein the uniaxial tensile test complies with special test regulations.

1 . A multi-layer, substantially polyvinyl chloride- and polyolefin-free composite film, comprising at least one carrier layer which has ABS or polystyrene or polyester, characterised in that in the single-axis tensile testing of a test body comprising the composite film, a maximum tensile force of between 30 Newtons and 280 Newtons occurs, wherein the single-axis tensile testing procedure satisfies the following testing specification ( FIG. 1 ): 
 a) a test body in accordance with type 1 B as set forth in ISO 527-2:1996 Section 6 of a thickness which corresponds to the thickness of the composite film to be tested is stored prior to the beginning of the test for 24 hours at 23° C. and 50% relative air humidity;    b) the step of clamping the test body pretreated in that way into a testing apparatus in accordance with ISO 527-1:1996 Section 5 is then effected, wherein the longitudinal axis of the test body is parallel to the composite film extrusion or calendering direction, and the prestressing is applied in accordance with ISO 527-1:1996 Sections 9.2 and 9.5;    c) subsequent implementation of the single-axis tensile test is effected in accordance with ISO 527-1:1996 at a constant testing speed of 800 mm/min and at a constant temperature of 80° C., wherein immediately prior in time to the beginning of implementation of the tensile test the clamped test body remains in a climatic chamber temperature-controlled at 80° C. for a period of 10 minutes, and    d) during the implementation of the tensile test recording of the tensile forces which occur is effected in dependence on the test time from the beginning of the testing procedure in a range of nominal stretch ε t  (in accordance with ISO 527-1:1996 Section 10.2) of between 0% and 100%.    
     
     
         2 . A composite film according to  claim 1  which is a furniture film.  
     
     
         3 . A composite film according to  claim 1  characterised in that the ABS is an ABS with admixtures.  
     
     
         4 . A composite film according to  claim 1  characterised in that the polystyrene is a polystyrene with admixtures or a high impact polystyrene.  
     
     
         5 . A composite film according to  claim 1  characterised in that the polyester is an amorphous polyester copolymer.  
     
     
         6 . A composite film according to  claim 1  characterised in that the carrier layer of the composite film is of a thickness of between 100 and 1000 μm.  
     
     
         7 . A composite film according to  claim 1  characterised in that it has at least one carrier layer with amorphous polyester copolymer, wherein in the single-axis tensile testing of such a composite film a maximum tensile force of between 50 Newtons and 120 Newtons, or between 65 Newtons and 105 Newtons, occurs.  
     
     
         8 . A composite film according to  claim 7  characterised in that it is of a thickness of between 200 and 600 μm, or between 300 and 450 μm.  
     
     
         9 . A composite film according to  claim 1  characterised in that it has at least one carrier layer with ABS or polystyrene wherein in the single-axis tensile testing of such a composite film a maximum tensile force of between 50 Newtons and 230 Newtons, or between 105 Newtons and 235 Newtons, occurs.  
     
     
         10 . A composite film according to  claim 9  characterised in that in the tensile testing of such a composite film a maximum tensile force of between 105 Newtons and 180 Newtons occurs.  
     
     
         11 . A composite film according to  claim 9  characterised in that the polystyrene is HIPS.  
     
     
         12 . A composite film according to  claim 9  characterised in that it is of a thickness of between 400 and 1000 μm, or between 600 and 800 μm.  
     
     
         13 . A composite film according to  claim 1  characterised in that the composite film under a cover layer has a single-layer extrudate or at least double-layer co-extrudate as the carrier layer.  
     
     
         14 . A composite film according to  claim 13  characterised in that at least one layer of the composite film has UV-stabilisers or UV-absorbers or pigments in a proportion by volume of between 0.1 and 10%.  
     
     
         15 . A composite film according to  claim 13  characterised in that the carrier layer or at least one layer of the carrier layer has additives for Vicat reduction with a proportion by weight of between 1 and 70%.  
     
     
         16 . A composite film according to  claim 13  characterised in that the carrier layer or at least one layer of the carrier layer have polycaprolactone in a proportion by weight of between 0.5 and 15%.  
     
     
         17 . A composite film according to  claim 13  characterised in that the carrier layer or at least one layer of the carrier layer have amorphous polyester copolymer in a proportion by weight of between 30 and 70%.  
     
     
         18 . A composite film according to  claim 13  characterised in that the carrier layer, in the case of a multi-layer, in at least one layer has recycled material from the ongoing production process.  
     
     
         19 . A composite film according to  claim 18  characterised in that the carrier layer has a double-layer structure.  
     
     
         20 . A composite film according to  claim 13  characterised in that a primer layer is applied to the side of the carrier layer, which is in opposite relationship to the cover layer of the composite film.  
     
     
         21 . A composite film according to  claim 13  characterised in that in the case of the single-layer structure thereof the carrier layer is of a thickness of between 94 and 98% of the overall thickness of the composite film.  
     
     
         22 . A composite film according to  claim 13  characterised in that the cover layer of the composite film is co-extruded together with the carrier layer and has PMMA or impact-resistant modified PMMA.  
     
     
         23 . A composite film according to  claim 13  characterised in that the composite film has an overall thickness of between 500 and 1000 μm, or between 500 and 800 μm.  
     
     
         24 . A composite film according to  claim 13  characterised in that the cover layer of the composite film is of a layer thickness of between 1 and 5%, or in the range of from 3 to 4%, of the overall thickness of the composite film.  
     
     
         25 . A composite film according to  claim 13  characterised in that in the case of a double-layer carrier layer the first layer thereof is of a thickness of between 5 and 20%, or between 10 and 15%, of the overall thickness of the composite film and the second layer of the carrier layer is of a thickness of between 74 and 93%, or between 75 and 85%, of the overall thickness of the composite film.  
     
     
         26 . A composite film according to  claim 13  characterised in that as the cover layer a transparent scratch-resistant coating is laminated on the carrier layer or applied by thermal transfer printing.  
     
     
         27 . A composite film according to  claim 26  characterised in that the composite film is of an overall thickness of between 200 and 600 μm, or between 300 and 450 μm.  
     
     
         28 . A composite film according to  claim 26  characterised in that the cover layer of the composite film is of a layer thickness of between 1 and 5%, or between 1 and 3%, of the overall thickness of the composite film.  
     
     
         29 . A composite film according to  claim 26  characterised in that in the case of a double-layer carrier layer the first layer thereof is of a thickness of between 20 and 40%, or between 25 and 35%, of the overall thickness of the composite film and the second layer of the carrier layer is of a thickness of between 60 and 75%, or between 65 and 70%, of the overall thickness of the composite film.  
     
     
         30 . A composite film according to  claim 26  characterised in that as the cover layer a transparent scratch-resistant coating is applied to the carrier layer by printing or lacquering.  
     
     
         31 . A composite film according to  claim 30  characterised in that the composite film is of an overall thickness of between 200 and 600 μm, or between 300 and 450 μm.  
     
     
         32 . A composite film according to  claim 26  characterised in that the cover layer of the composite film is of a layer thickness of between 1 and 5%, or between 1 and 3%, of the overall thickness of the composite film.  
     
     
         33 . A composite film according to  claim 30  characterised in that in the case of a double-layer carrier layer the first layer thereof is of a thickness of between 20 and 40%, or between 25 and 35%, of the overall thickness of the composite film and the second layer of the carrier layer is of a thickness of between 60 and 75%, or between 65 and 70%, of the overall thickness of the composite film.  
     
     
         34 . A composite film according to  claim 13  characterised in that the carrier layer has an additional co-extruded layer facing towards the primer layer.  
     
     
         35 . A composite film according to  claim 34  characterised in that the additional co-extruded layer comprises amorphous polyester copolymer with anti-blocking additive.  
     
     
         36 . A composite film according to  claim 13  characterised in that the cover layer is of a multi-layer structure and is laminated as a finished pre-product on to the carrier layer.  
     
     
         37 . A composite film according to  claim 36  characterised in that the cover layer has four layers, wherein the first layer is a transparent scratch-resistant coating, the second layer is a transparent overlay film comprising amorphous polyester copolymer, the third layer is a decorative layer and the fourth layer is a primer layer.  
     
     
         38 . A composite film according to  claim 36  characterised in that the composite film is of an overall thickness of between 200 and 600 μm, or between 300 and 450 μm.  
     
     
         39 . A composite film according to  claim 36  characterised in that the cover layer is of a thickness of between 30 and 40%, or between 33 and 37%, of the overall thickness of the composite film.  
     
     
         40 . A composite film according to  claim 13  characterised in that the side of the carrier layer, which is in opposite relationship to the cover layer, has at least one decorative layer or at least one colour cover layer or at least one primer layer.  
     
     
         41 . A composite film according to  claim 40  characterised in that the cover layer has a transparent scratch-resistant coating with UV-stabilisers and/or UV-absorbers.  
     
     
         42 . A composite film according to  claim 40  characterised in that the co-extruded carrier layer is at least 80% of the overall thickness of the composite film.  
     
     
         43 . A composite film according to  claim 40  characterised in that the first layer of the carrier layer is chemically and/or mechanically matted.  
     
     
         44 . A composite film according to  claim 40  characterised in that the decorative or colour cover layer(s) is(are) applied to the carrier layer by copper intaglio printing or flexographic printing or screen printing or offset printing.  
     
     
         45 . A composite film according to  claim 40  characterised in that the carrier layer is transparent.  
     
     
         46 . A multi-layer, substantially vinyl- and polyolefin-free composite film, which has at least one carrier layer comprising ABS or polystyrene or polyester characterised in that the composite film under a cover layer has a single-layer extrudate or at least double-layer co-extrudate as the carrier layer.  
     
     
         47 . A composite film according to  claim 46  which is a furniture film.  
     
     
         48 . A composite film according to  claim 46  characterised in that the ABS is an ABS with admixtures.  
     
     
         49 . A composite film according to  claim 46  characterised in that the polystyrene is a polystyrene with admixtures or a high impact polystyrene.  
     
     
         50 . A composite film according to  claim 46  characterised in that the polyester is an amorphous polyester copolymer.  
     
     
         51 . A composite film according to  claim 46  characterised in that as the cover layer a transparent scratch-resistant coating is laminated on the carrier layer or applied by thermal transfer printing.  
     
     
         52 . A composite film according to  claim 46  characterised in that as the cover layer a transparent scratch-resistant coating is applied to the carrier layer by printing or lacquering.  
     
     
         53 . A composite film according to  claim 46  characterised in that the carrier layer has an additional co-extruded layer facing towards the primer layer, or comprising amorphous polyester copolymer with anti-blocking additive.  
     
     
         54 . A composite film according to  claim 53  characterised in that the additional co-extruded layer comprises amorphous polyester copolymer with anti-blocking additive.  
     
     
         55 . A composite film according to  claim 46  characterised in that the cover layer is of a multi-layer structure and is laminated as a finished pre-product on to the carrier.  
     
     
         56 . A composite film according to  claim 46  characterised in that the side of the carrier layer, which is in opposite relationship to the cover layer, has at least one decorative layer or at least one colour cover layer or at least one primer layer.  
     
     
         57 . A composite film according to  claim 56  characterised in that the cover layer has a transparent scratch-resistant coating with US-stabilisers or UV-absorbers.