Article of apparel
The present invention is directed toward an article of apparel effective to regulate the temperature of the wearer. In an embodiment, the article of apparel includes a base textile with a thermal regulation membrane. The thermal regulation membrane contains a plurality of system-reactive components selectively engaged heat and/or moisture. In an embodiment, the printed coating includes a cooling agent, a phase change material, and a heat dissipation material. In operation, the article of apparel is effective to delay/diminish the rise in skin temperature (compared to a garment lacking the membrane), increasing wearer comfort.
1. An article of apparel comprising:
a textile substrate including a first surface and a second surface opposite the first surface; and
a thermal regulation membrane applied as a printed coating on the first surface of the textile substrate such that a first portion of the thermal regulation membrane is below the first surface of the textile substrate while a second portion of the thermal regulation membrane is exposed above the first surface of the textile substrate, the thermal regulation membrane comprising a plurality of system reactive components and a binder that adheres the system reactive components to the textile substrate, the system reactive components being selectively engaged in response to conditions of a wearer wearing the article of apparel, wherein the plurality of system reactive components comprises a water-activated cooling agent present in an amount from 15 wt % to 35 wt % of the system reactive components, wherein the water activated cooling agent comprises a polyol, a reversible-state, latent heat agent present in an amount from 25 wt % to 45 wt % of the system reactive components, wherein the latent heat agent comprises a paraffin linear chain hydrocarbon having 15-20 carbon atoms, and a mineral heat dissipation agent present in an amount from 25 wt % to 45 wt % of the system reactive components, wherein the heat dissipation agent comprises a silicate mineral, the silicate mineral comprising jade;
wherein the thermal regulation membrane is discontinuous and defines treated areas and untreated areas along the first substrate surface, and the untreated areas comprise a plurality of intersecting channels disposed between and separating sections of treated areas.
2. The article of apparel according to claim 1 , wherein:
the water-activated cooling agent is a crystalline polyol selected from the group consisting of sorbitol, xylitol and erythritol.
3. The article of apparel according to claim 1 , wherein the binder is polyurethane.
4. The article of apparel according to claim 3 , wherein the textile substrate is selected from the group consisting of a woven fabric, a knitted fabric, and a nonwoven fabric.
5. The article of apparel according to claim 4 , wherein:
the first surface of the textile substrate is a wearer-facing surface of the article of apparel; and
the article of apparel is oriented such that the first surface of the textile substrate with the second portion of the thermal regulation membrane contacts the wearer.
6. The article of apparel according to claim 5 , wherein:
the first surface of the textile substrate defines a surface area; and
the thermal regulation membrane covers up to 30% of the surface area of the first surface of the textile substrate.
7. The article of apparel according to claim 1 , wherein the intersecting channels of untreated areas and separated sections of treated areas of the thermal regulation membrane define a repeating pattern of pattern units along the first surface of the textile substrate, each pattern unit comprising a central untreated area portion and a plurality of untreated area channels extending continuously and radially from the central untreated area portion to a location distant from the central untreated area portion.
8. The article of apparel according to claim 1 , wherein the thermal regulation membrane contains pores that facilitate transport of water within the thermal regulation membrane.
9. The article of apparel according to claim 1 , wherein the first surface of the textile substrate comprises a bimodal surface in which water absorption, heat absorption and heat dissipation properties differ between the treated areas and the untreated areas of the first surface of the textile substrate.
10. The article of apparel according to claim 1 , wherein a weight ratio of cooling agent to latent heat agent to heat dissipation agent within the thermal regulation membrane is 1:2:2 so as to vary an activation time between the components.
11. The article of apparel according to claim 1 , wherein the cooling agent is present within the system reactive components in an amount of about 25 wt %, the latent heat agent is present within the system reactive components in an amount of about 35 wt %, and the heat dissipation agent is present within the system reactive components in an amount of about 40 wt %.