Protective garment with low friction characteristics
View Patent ↗A protective garment including an outer shell and an inner liner coupled to the outer shell and positioned such that the inner liner is positioned between a wearer and the outer shell when the garment is worn. The inner liner includes a base material and a high lubricity material which has a higher lubricity than the base material. The high lubricity material is woven into the base material to form a plurality of discrete contact areas that each comprise at least two separate warp fibers or yarns of high lubricity material each being individually woven with at least two separate weft fibers or yarns of high lubricity material.
1. A protective garment comprising: an outer shell; and an inner liner coupled to the outer shell and positioned such that the inner liner is positioned between a wearer and the outer shell when the garment is worn, the inner liner including a base material and a high lubricity material which has a lubricity that is higher than the base material, wherein the high lubricity material is woven into the base material to form a plurality of strips of high lubricity material and a plurality of discrete contact areas formed at the intersection of at least two strips, wherein within each discrete contact area a portion of each strip comprises a plurality of generally parallel, adjacent fibers of the high lubricity material, wherein each discrete contact area comprises at least two separate warp fibers or yarns of high lubricity material each being individually woven with at least two separate weft fibers or yarns of high lubricity material.
2. The garment of claim 1 wherein an upper surface of each contact area is positioned above a plane defined by the base material.
3. The garment of claim 1 wherein the high lubricity material is a multifilament material.
4. The garment of claim 1 wherein each discrete contact area is spaced apart from any adjacent contact areas.
5. The garment of claim 1 wherein the density of the high lubricity material at a contact area is about double the density of the high lubricity material in an associated one of the strips outside of a contact area.
6. The garment of claim 1 wherein the inner liner constitutes 100% high lubricity material at each contact area, and the inner liner substantially lacks any high lubricity material in areas other than the strips or the contact areas.
7. The garment of claim 1 wherein the base material comprises a plurality of yarns oriented generally perpendicular to each other and arranged in a grid.
8. The garment of claim 1 wherein the high lubricity material shrinks less than the base material upon laundering.
9. The garment of claim 1 wherein the base material and the high lubricity material are each flame and fire resistant, and comply with requirements specified in National Fire Protection Association 1971 Standard on Protective Ensembles for Structural Fire Fighting and Proximity Fire Fighting.
10. The garment of claim 1 wherein the contact areas collectively constitute between about 5 percent and about 30 percent of the surface area of the associated side of the inner liner.
11. The garment of claim 1 wherein the associated side of the inner liner has a static friction of less than about 0.33 Newtons.
12. The garment of claim 1 wherein the outer shell resists igniting, burning, melting, dripping or separation when exposed to a temperature of 500° F. for at least five minutes.
13. The garment of claim 1 further comprising a moisture barrier positioned between the inner liner and the outer shell, the moisture barrier being made of a material that is generally liquid impermeable and generally moisture vapor permeable.
14. The garment of claim 1 further comprising a thermal liner positioned between the inner liner and the outer shell, wherein the thermal liner has a thermal protection performance of at least about twenty.
15. The garment of claim 1 wherein the inner liner is the innermost layer of the garment and the contact areas are configured and positioned to face a wearer, or the inner liner is positioned and configured such that the contact areas face another liner, or the outer shell, of the garment.
16. A garment layer including:
a base material; and
a high lubricity material which has a lubricity that is higher than the base material, wherein the high lubricity material is woven into the base material to form a plurality of discrete contact areas that each comprise at least two separate warp fibers or yarns of high lubricity material each being individually woven with at least two separate weft fibers or yarns of high lubricity material with no intervening filaments of base material therein.
17. The layer of claim 16 wherein the layer constitutes 100% high lubricity material at each contact area, and wherein the layer lacks any high lubricity material in a majority of a surface area thereof.
18. A method for making a protective garment comprising:
providing a base material and a high lubricity material; and
weaving filaments of the high lubricity material with the base material to form a garment layer that has a plurality of discrete, spaced-apart substantially continuous contact areas;
wherein the high lubricity material has a lubricity that is higher than the base material and the contact areas comprise at least two separate warp fibers or yarns of high lubricity material each being individually woven with at least two separate weft fibers or yarns of high lubricity material with no intervening filaments of base material therein.