Scrim coated products having a coextruded multi-layer coating on one side thereof

Patent metadata

Field	Value
Publication number	US-10030325-B2
Application number	US-201615165692-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	May 29, 2015
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

Protective coverings are disclosed that have a scrim made up of warp and weft members that define a plurality of interstices coated on only a first major surface thereof by a multi-layer coating with a first layer of the multi-layer coating juxtaposed to the first major surface, and penetrating into the interstices of the scrim to co-define, with the warp and weft members, an opposing second major surface of the scrim. The first layer of the multi-layer coating has a melting point below 100° C. and comprises a copolymer of ethylene, and provides the co-defined opposing second major surface of the scrim with a coefficient of friction of at least 0.5 when tested with dry leather and at least 0.7 when tested with dry rubber.

First claim

What is claimed is:

1. A protective covering comprising:
a scrim comprising warp and weft members that define a plurality of interstices, the scrim having a first major surface and an opposing second major surface; and
a multi-layer coating applied to the first major surface of the scrim with a first layer juxtaposed to the first major surface and a core layer on an opposed surface of the first layer relative to the first major surface, the first layer being penetrated into the interstices of the scrim to co-define, with the warp and weft members, the opposing second major surface of the scrim;
wherein the first layer has a melting point below 100° C., and comprises a copolymer of ethylene;
wherein the core layer comprises polypropylene and makes up about 10% to about 90% of a total thickness of the multi-layer coating; and
wherein the co-defined opposing second major surface of the scrim has a coefficient of friction of at least 0.5 when tested with dry leather and at least 0.7 when tested with dry rubber.

2. The protective covering of claim 1 , wherein the copolymer of ethylene comprises, as a copolymer with the ethylene, one or more of propylene, butane, vinyl acetate, and methylacrylate, or is a styrene block copolymer.

3. The protective covering of claim 1 , wherein the multi-layer coating is coextruded onto the scrim.

4. The protective covering of claim 1 , wherein the polypropylene is a homopolymer of polypropylene.

5. The protective covering of claim 4 , wherein the homopolymer of polypropylene has a greater Vicat softening temperature than the copolymer of ethylene.

6. The protective covering of claim 4 , wherein the homopolymer of polypropylene is mixed with a minor amount of low density polyethylene.

7. The protective covering of claim 1 , wherein the core layer further comprises one or more of low density polyethylene, linear low density polyethylene, ethyl vinyl acetate, ethylene methyl acrylate, or copolymers of ethylene in a minor amount relative to the amount of polypropylene in the core layer.

8. The protective covering of claim 1 , wherein the multi-layer coating has an A/B/A or A/B/C construction with a first A layer being the first layer of the multi-layer coating.

9. The protective covering of claim 8 , wherein the second A layer or the C layer has an embossed major outermost surface.

10. The protective covering of claim 1 , wherein the interstices of the scrim define about 10% to about 40% of the surface area of the opposing second major surface of the scrim.

11. The protective covering of claim 1 , wherein the scrim is a woven or knitted material.

12. The protective covering of claim 1 , wherein the plurality of warp and weft members each have a denier value in the range of about 200 to about 2000 denier.

13. The protective covering of claim 1 , wherein the scrim comprises four to twelve warp members and two to eight weft members.

14. The protective covering of claim 1 , wherein the protective covering is lumber wrap or roofing underlayment.

15. The protective covering of claim 1 , wherein the multi-layer coating further comprises, in one or more layers thereof, a UV stabilizer.

16. The protective covering of claim 1 , wherein the polymer present in the core in the greatest amount has a Vicat softening temperature greater than that of the copolymer of ethylene.

17. The protective covering of claim 16 , wherein the Vicat softening temperature of the polymer in the core is greater than 120° C., and a Vicat softening temperature of the first layer comprising the copolymer of ethylene and a polymer of an opposing skin layer, disposed on an opposite side of the core from the first layer, are both less than 80° C.

18. The protective covering of claim 16 , wherein a melting point of the polymer in the core is greater than 120° C., and a melting point of a polymer in a skin layer of the multi-layer coating opposite the first layer relative to the core has a melting point less than 100° C.

19. The protective covering of claim 1 , wherein the copolymer of ethylene has a melt flow rate of about 5 g/10 min to about 50 g/10 min.

Assignees

• Intertape Polymer Corp

Inventors

• Arthurs Trevor

Classifications

• B32B2307/72

  Density · CPC title

• B32B2270/00

  Resin or rubber layer containing a blend of at least two different polymers · CPC title

• B32B5/08

  the fibres or filaments of a layer being of different substances {, e.g. conjugate fibres, mixture of different fibres} · CPC title

• B32B27/08

  of synthetic resin · CPC title

• B32B2260/046

  Synthetic resin · CPC title