US4882208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer composite sheet, especially for use as a padding layer under artificial grass
Assignee: BALSAM SPORTSTATTENBAU BISAMWEG 3 POSTFACH 1143 4803 STEINHAGEN WEST GERMANY
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Filing: 1988-05-26
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Granted: 1989-11-21
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Expires: 2008-05-26
Abstract
Abstract A multilayer composite sheet, especially for use as a padding layer underneath artificial grass, or turf includes a bottom layer of expanded synthetic resin, particularly of closed-cell polyethylene foam, and a metallic foil flatly bonded to the foam material. The multilayer composite sheet exhibits low weight per unit area, low water absorption, and low thermal linear expansion suitable for exposure to ambient weather conditions especially sunlight.
Inventors
- 👤 Hans-Ulrich Breitscheidel
- 👤 Rudolf Kautz
- 👤 Karl-Heinz Sandermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:35
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/046; B32B15/08; B32B15/085; B32B15/12; B32B15/20; B32B27/00; B32B27/32; B32B5/00; B32B5/18; E; E01; E01C; E01C13/00; E01C13/08; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/025; B32B2266/08; B32B2305/00; B32B2305/02; B32B2305/026; B32B2311/00; B32B2311/24; B32B2317/00; B32B2317/12; B32B2317/122; B32B2323/00; B32B2323/04; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249977; Y10T428/249987; Y10T428/249988; Y10T428/24999; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31703; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
47 words
A multilayer composite sheet for use as a padding layer underneath an artificial grass layer which comprises a bottom layer of closed-cell crosslinked polyethylene foam material and an upper layer of a metallic layer; said upper layer being bonded to the bottom layer via an intermediate layer.
Claim 2
Dependent Claim
47 words
A multilayer composite sheet for use as a padding layer underneath an artificial grass layer which comprises a bottom layer of closed-cell crosslinked polyethylene foam material and an upper layer of a metallic layer; said upper layer being bonded to the bottom layer via an intermediate layer.
Claim 3
Dependent Claim
24 words
A multilayer composite sheet according to claim 1, wherein the intermediate layer is one of a cellulosic material layer and a non-crosslinked polyethylene layer.
Claim 4
Dependent Claim
41 words
A multilayer composite sheet according to claim 2, wherein the metallic layer is an aluminum foil having a thickness of 5-15 μm and said intermediate layer comprises a kraft paper having a weight per unit area of 30-60 g/m 2 .
Claim 5
Dependent Claim
32 words
A multilayer composite sheet according to claim 3, wherein the kraft paper is laminated with the polyethylene foam material by flame lamination and is laminated to the aluminum foil with an adhesive.
Claim 6
Dependent Claim
24 words
A multilayer composite sheet according to claim 1, wherein said closed-cell crosslinked polyethylene foam material has a gross density of 30-150 kg/m 3 .
Claim 7
Dependent Claim
18 words
A multilayer composite sheet according to claim 1, wherein the foam material has a thickness of 5-20 mm.
Claim 8
Dependent Claim
37 words
A multilayer composite sheet according to claim 1, wherein the metallic layer is an aluminum foil having a thickness of 5-30 μm and said intermediate layer is a non-crosslinked polyethylene sheet having a thickness of 10-30 -m.
Claim 9
Dependent Claim
24 words
A multilayer composite sheet according to claim 1, wherein the sheet is perforated with a plurality of holes to promote drainage of water therethrough.
Claim 10
Dependent Claim
73 words
A process for cushioning an artificial grass layer which comprises placing a multilayer composite sheet comprising a bottom layer of closed-cell crosslinked polyethylene foam and a layer of a heat-reflective metallic layer bonded to the bottom layer via an intermediate layer underneath an artificial grass layer exposed to ambient weather conditions of heat and light; said layer of a heat-reflective metallic layer being positioned between the bottom layer and the artificial grass layer.
Claim 11
Dependent Claim
73 words
A process for cushioning an artificial grass layer which comprises placing a multilayer composite sheet comprising a bottom layer of closed-cell crosslinked polyethylene foam and a layer of a heat-reflective metallic layer bonded to the bottom layer via an intermediate layer underneath an artificial grass layer exposed to ambient weather conditions of heat and light; said layer of a heat-reflective metallic layer being positioned between the bottom layer and the artificial grass layer.
Claim 12
Dependent Claim
28 words
A process for cushioning an artificial grass layer, further comprising positioning the multilayer composite sheet so that the layer of heat-reflective metallic layer supports the artificial grass layer.
Claim 13
Dependent Claim
28 words
A process for cushioning an artificial grass layer, further comprising positioning the multilayer composite sheet so that the layer of heat-reflective metallic layer supports the artificial grass layer.
References Cited (Backward Citations)
US4489115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |