# US 4,391,870 A · Spray-suppression device

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- Number: US 4,391,870 A
- Document ID: US4391870A
- Status: Granted
- Kind: A
- Application number: 06/365,342
- Filed: 1982-04-05
- Granted: 1983-07-05
- Earliest claimed: 1982-04-05
- Assignees: Monsanto Company
- Inventors: Earle R. Ellis
- Web page: https://patentgrep.com/patent/US4391870A

## CPC

- B32B 27/12: next to a fibrous or filamentary layer
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B62D 25/18: Parts or details thereof, e.g. mudguard flaps
- B32B 2262/0261: Polyamide fibres
- B32B 2323/043: HDPE, i.e. high density polyethylene
- B32B 2323/046: LDPE, i.e. low density polyethylene
- Y10T 428/24992: Density or compression of components
- Y10T 442/678: Olefin polymer or copolymer sheet or film [e.g., polypropylene, polyethylene, ethylene-butylene copolymer, etc.]
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A laminated, spray-suppression device having service properties over a wide range of use temperatures includes a non-woven nylon fabric core layer to inhibit stress cracks originating at low temperatures in an embrittled, grass-like low density polyethylene or polypropylene layer on one side of the core layer from propagating through to a high density polyethylene backing layer on the other side of the core layer.

## Claims

### Claim 1

A laminated spray-suppression device comprising a non-woven polyamide fabric core layer encapsulated on each side with an adhesive layer, a backing layer of high density polyethylene fusion-bonded to one of the adhesive layers and a grass-like, three-dimensional layer of low density polyethylene or polypropylene fusion-bonded to the other adhesive layer.

### Claim 2 (depends on 1)

The device of claim 1 wherein the core layer comprises nylon 6,6.

### Claim 3 (depends on 1)

The device of claim 1 wherein each adhesive layer comprises a copolymer of ethylene and vinyl acetate.

### Claim 4 (depends on 2)

The device of claim 2 wherein the core layer has a nominal weight of about 1.5 ounces per square yard.

### Claim 5 (depends on 4)

The device of claim 4 wherein the thickness of each adhesive layer is about 5 mils.

### Claim 6 (depends on 1, 2, 3, 4, 5)

The device of claims 1, 2, 3, 4 or 5 wherein the grass-like layer comprises low density polyethylene.

### Claim 7

A method of minimizing the tendency of a spray-suppression laminate which includes a grass-like layer of low density polyethylene or polypropylene and a backing layer of high density polyethylene to crack through its thickness on the application of stress at low temperature, said method comprising the step of incorporating a core layer into the laminate between said high density and grass-like layers for inhibiting crack-propagation from the grass-like layer to the high density polyethylene layer, said core layer comprising a non-woven nylon fabric encapsulated on each side with a thermoplastic adhesive layer melt bondable to said high density polyethylene and grass-like layers.

### Claim 8 (depends on 7)

The process of claim 7 including the step of absorbing the thermoplastic adhesive into a predetermined portion of the thickness of the core layer before said incorporating step.

### Claim 9 (depends on 8)

The process of claim 8 wherein the adhesive comprises a copolymer of ethylene and vinyl acetate.

### Claim 10 (depends on 7, 8, 9)

The process of claims 7, 8 or 9 wherein the grass-like layer comprises low density polyethylene.