Ectrudable cement core thermoplastic composite

• US 6,358,585 B1
• Filed: 05/14/1997
• Issued: 03/19/2002
• Est. Priority Date: 05/14/1996
• Status: Expired due to Fees

• Current Assignee: Crane Building Products LLC
• Original Assignee: Crane Plastics Company Limited Partnership
• Inventors: Wolff, John C.
• Primary Examiner(s): KILIMAN, LESZEK B
• Application Number:
  US08/856,449
• Time in Patent Office: 1,770 Days
• Field of Search: 428/36.6, 428/522, 428/325, 428/446, 428/451, 427/393.6
• US Class Current: 428/36.6
• CPC Class Codes: B28B 3/2636 using means for co-extruding different materials
• CPC Class Codes: B32B 13/02 with fibres or particles being present as additives in the layer
• CPC Class Codes: B32B 13/12 of synthetic resin
• CPC Class Codes: B32B 2262/062 Cellulose fibres, e.g. cotton
• CPC Class Codes: B32B 2307/3065 Flame resistant or retardant, fire resistant or retardant
• CPC Class Codes: B32B 2307/734 Dimensional stability
• CPC Class Codes: B32B 2419/00 Buildings or parts thereof
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 3/04 characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 428/1379 Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
• CPC Class Codes: Y10T 428/252 Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
• CPC Class Codes: Y10T 428/31667 Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31935 Ester, halide or nitrile of addition polymer

Abstract

A panel for use in siding is disclosed. The panel has a cement core in a shape defining the panel of the siding, and a plastic film layer attached to the cement core. The plastic film layer is either a polymer or a copolymer of vinyl chloride. The panel may also have an adhesive layer which adheres the plastic film layer to the cement core. The cement core may contain fiber reinforcement.

Claims

1. A panel for use in siding which comprises:

a cement core in a shape defining the panel of the siding; and

a plastic film layer attached to the cement core, wherein the plastic film layer is selected from the group consisting of polymers and copolymers of vinyl chloride.

2. The panel of claim 1 futher comprising an adhesive layer which adheres the plastic film layer to the cement core.

3. The panel of claim 1 wherein the cement core contains fiber reinforcement.

4. The panel of claim 1 wherein the plastic film layer surrounds the cement core.

5. A method of making a panel for use in siding which comprises coextruding a cement core and a plastic film layer to form a panel, wherein the plastic film layer is selected from the group consisting of polymers and copolymers of vinyl chloride.

6. The method of claim 5 further comprising coextruding an adhesive layer between the cement core and the plastic film layer.

7. The method of claim 5 wherein the plastic film layer is coextruded such that the plastic film layer completely surrounds the cement core.

8. A method of making a panel for use in siding which comprises laminating a plastic film layer to a cement core to form a panel, wherein the plastic film layer is selected from the group consisting of polymers and copolymers of vinyl chloride.

9. The method of claim 8 further comprising providing an adhesive layer between the plastic film layer and the cement core.