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

Patent metadata

Field	Value
Publication number	US-2016348286-A1
Application number	US-201615165692-A
Country	US
Kind code	A1
Filing date	May 26, 2016
Priority date	May 29, 2015
Publication date	Dec 1, 2016
Grant date	—

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, 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 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 multi-layer coating further comprises a core layer comprising polypropylene as about 10% to about 90% of the total thickness of the film.

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

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

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

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 multi-layer coating has an AB/A/ or A/B/C construction with a first A layer being the first layer of the multi-layer coating.

11 . 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.

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

13 . 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.

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

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

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

17 . The protective covering of claim 1 , wherein the multi-layer coating further comprises a core layer, wherein the polymer present in the core in the greatest amount has a Vicat softening temperature greater than that of the copolymer of ethylene.

18 . The protective covering of claim 17 , wherein the Vicat softening temperature of the polymer in the core is greater than 120° C., and a Vicat softening temperature of the copolymer of ethylene and a polymer of an opposing skin layer are both less than 80° C.

19 . The protective covering of claim 17 , 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 opposite the first layer has a melting point less than 100° C.

20 . 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

• Arthurs Trevor
• Intertape Polymer Corp

Inventors

• Arthurs Trevor

Classifications

• D03D1/0035 Primary

  Protective fabrics · CPC title

• D04H13/001

  Making non-woven fabrics from staple fibres, filaments or yarns, bonded to at least one web-like material, e.g. woven, knitted non-woven fabric, paper, leather, during consolidation · CPC title

• D10B2321/021

  polyethylene · CPC title

• B32B2260/021

  Fibrous or filamentary layer · CPC title

• D03D15/46

  Flat yarns, e.g. tapes or films · CPC title