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Multi-layer lonomer sheet having improved weathering

A multi-layer sheet, ionomer resin technology, applied in the direction of lamination, layered products, lamination devices, etc., can solve the problems of prolonging the mechanical properties of the product body, unable to maintain the appearance and surface properties, etc.

Inactive Publication Date: 2007-01-03
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, these practices can prolong the mechanical properties of the article body, such as elongation or strength during long-term open air exposure, but cannot maintain the desired appearance surface properties such as gloss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Similar multilayer constructions of different pigmented sheets were fabricated with thermocouples embedded between the multilayer pigmented sheets and the injection molded cladding backing layer. The precursor sheet is a 2-layer construction, a transparent ionomer layer and a pigmented ionomer layer. Thermocouples are mounted on the backside pigmented layer and a thicker ionomer backing is injection molded to the sheet to produce a three-layer construction consisting of a clear surface layer, a pigmented second layer and a thicker clear backing Floor. The approximate thickness of each layer is 5 mil (127 μm) clear layer, 18 mil (457.2 μm) color layer and 100 mil (2540 μm) clear backing layer. The amount of pigment added to the second layer is such that it provides sufficient hiding power to maintain its visually colored appearance independent of the background color behind the sheet.

[0069] Surlyn(R) 1706 - an ionomer resin, 0.65 MI (melt index), zinc neutralized et...

Embodiment 2

[0076] A similar multi-layer construction of different colored sheets was made with each layer having a similar UV additive package. The precursor sheet was a four-layer construction comprising a clear ionomer surface layer, a pigmented ionomer second layer, an adhesive third layer and a polypropylene (PP) based backing layer. The sheet is injection-clad with PP material to produce a five-layer construction comprising a clear surface layer, a pigmented second layer, and a third layer of binder, a fourth layer of PP and a thick layer of cladding PP. The approximate thickness of each layer is: 5 mil clear layer, 12 mil tinted layer, 4 mil adhesive layer, 10 mil sheet backing layer and 90 mil PP cladding. The amount of pigment added to the second layer is such that it provides sufficient hiding power to maintain its visually colored appearance independent of the background color behind the sheet. The samples were subjected to J1960 accelerated weathering test and real-time Flori...

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PUM

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Abstract

A thermoplastic multi-layer sheet is disclosed which comprises a first thick clear thermoplastic polymeric polyolefin, a second polymeric layer, and optionally, a third thermoformable polymeric adhesive layer, and further optionally, a co-extruded backing layer adhered to the adhesive layer.

Description

Background technique [0001] The present invention relates to thermoplastic facing sheets, especially polyolefin facing sheets, especially multilayer sheets or laminates with improved weather resistance and as body panels for automobiles, trucks, recreational vehicles, lawn mowing and gardening vehicles and parts are especially useful. [0002] There is a need for a thermoplastic facing sheet having excellent weatherability. Typical thermoplastic multilayer sheets or laminates for exterior use have a transparent surface layer and a pigmented base layer. These sheets or laminates are used to make shaped parts, for example, parts for cars and trucks, like panels, automotive fascia parts, and parts for recreational vehicles by conventional thermoforming methods. Typically, after a sheet or laminate is thermoformed into a shaped surface part, it is placed into a mold and compression or injection clad onto a substrate to provide stiffness and handleability to the part. It is poss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B5/16B32B27/18B32B27/32B32B27/34
CPCB32B27/18Y10T428/31928Y10T428/261B32B27/32Y10T428/31938Y10T428/25B32B27/08B32B37/12B32B7/12B32B37/153
Inventor R·A·沃格尔
Owner EI DU PONT DE NEMOURS & CO