# US 2014/0154449 A1 · White and black ply laminate

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- Number: US 2014/0154449 A1
- Document ID: US20140154449A1
- Status: Published application
- Kind: A1
- Application number: 14/157,106
- Filed: 2014-01-16
- Published: 2014-06-05
- Earliest claimed: 2012-12-05
- Assignees: Johns Manville
- Applicants: Johns Manville
- Inventors: Lichih R. Peng; Zebonie Sukle; Jordan Kortmeyer; Thomas Justin Stock
- Web page: https://patentgrep.com/patent/US20140154449A1

## CPC

- E04D 11/00: Roof covering, as far as not restricted to features covered by only one of groups E04D1/00 - E04D9/00; Roof covering in ways not provided for by groups E04D1/00 - E04D9/00, {e.g. built-up roofs, elevated load-supporting roof coverings}
- B32B 37/153: {at least one layer is extruded and immediately laminated while in semi-molten state}
- E04D 5/06: by making use of plastics
- E04D 5/10: by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
- B32B 2419/06: Roofs, roof membranes
- Y10T 428/1452: Polymer derived only from ethylenically unsaturated monomer
- Y10T 428/24967: Absolute thicknesses specified
- E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

According to one embodiment, a method of making a roofing membrane is provided. According to the method, an ethylene propylene diene monomer rubber (EPDM) material sheet is provided and a thermoplastic polyolefin (TPO) material sheet is extruded onto the EPDM material sheet. The EPDM material sheet and TPO material sheet are then pressed together via one or more rollers. The EPDM material is uncured and has a thickness of between about 50 mils and 70 mils. The extruded TPO sheet has a temperature of at least 150 degrees Celsius and a thickness of between about 15 mils and 35 mils. The heat of the TPO material sheet causes a top portion of the EPDM material sheet to cure such that crosslinking of the TPO and EPDM material sheets occurs at an interface of the sheets to bond the sheets together.

## Claims

### Claim 1

A roofing membrane laminate comprising:
a first layer of an ethylene propylene diene monomer rubber (EPDM) material, the EPDM material having at least a portion thereof uncured and having a thickness of between about 50 mils and 70 mils; and
a second layer of a thermoplastic polyolefin (TPO) material coupled with the EPDM material, the TPO material having a thickness of between about 15 mils and 35 mils;
wherein the EPDM material and TPO material are coupled via crosslinking of the TPO and EPDM material at an interface thereof, and wherein at least a top portion of the EPDM material is cured via the application of heat after the EPDM material and TPO material are placed into contact so as to effect crosslinking of the materials.

### Claim 2 (depends on 1)

The roofing membrane laminate of claim 1, further comprising a fiber mat or film positioned between the TPO material sheet and the EPDM material sheet.

### Claim 3 (depends on 1)

The roofing membrane laminate of claim 1, wherein the EPDM material penetrates at least partially into yarn of the fiber mat and between fiber strands of the yarn such that the fiber mat is locked to the EPDM material.

### Claim 4 (depends on 1)

The roofing membrane laminate of claim 1, wherein the EPDM material comprises a slow cure EPDM material.

### Claim 5 (depends on 1)

The roofing membrane laminate of claim 1, further comprising a fiber mat or film coupled with a surface of the EPDM material opposite the interface of the EPDM and TPO materials.

### Claim 6 (depends on 5)

The roofing membrane laminate of claim 5, wherein the EPDM material penetrates at least partially into yarn of the fiber mat to lock the fiber mat and EPDM material together.

### Claim 7 (depends on 1)

The roofing membrane laminate of claim 1, further comprising an adhesive sheet material coupled with a surface of the EPDM material opposite the interface of the EPDM and TPO materials, the adhesive sheet material having a removable membrane covering an adhesive so as to allow the roofing membrane laminate to be attached to other objects or materials by removing the membrane and pressing the adhesive sheet material against the other objects or materials.