1. A fabric for supporting a fibrous web, comprising:
a layer having a web-facing side and a machine-facing side, the layer comprising:
a plurality of weft yarns comprising at least one of polyphenylene sulfide (PPS) and polyetheretherketone (PEEK);
a plurality of warp yarns interwoven with the plurality of weft yarns, the warp yarns comprising at least one of PPS and PEEK and at least some of the warp yarns having flat upper surfaces such that molten polymer drops do not penetrate an upper plane of the web-facing side; and
wherein the weft yarns and the warp yarns create a plurality of weave repeats each comprising four warp yarns and eight weft yarns, each warp yarn in each weave repeat forming a pattern by passing over five consecutive weft yarns and then passing under three consecutive weft yarns, and the pattern formed by each warp yarn in each weave repeat is offset by four weft yarns from the pattern formed by a first adjacent warp yarn, and the pattern formed by each warp yarn in each weave repeat is offset by two weft yarns from the pattern formed by a second adjacent warp yarn.
2. The fabric of claim 1, further comprising a seam connected to the layer, the seam comprising at least one of PPS and PEEK.
3. The fabric of claim 2, wherein the seam is in-line relative to other areas of the fabric layer, and the seam has the same permeability as other areas of the fabric layer.
4. The fabric of claim 2, wherein the seam and other areas of the fabric have the same caliper.
5. The fabric of claim 2, wherein the seam includes a spiral yarn comprising at least one of PPS and PEEK.
6. The fabric of claim 5, wherein the seam includes at least one anchor yarn engaged with the spiral yarn and at least some of the warp yarns.
7. The fabric of claim 1, wherein the web-facing side includes a plurality of small pockets, each small pocket being defined by a weft yarn passing over at most two consecutive warp yarns.
8. The fabric of claim 7, wherein the warp and weft yarns define a weave repeat over at least a portion of the layer, the weave repeat including at most two small pockets.
9. The fabric of claim 1, wherein the warp yarns have rectangular cross-sections.
10. The fabric of claim 1, wherein at least some of the weft yarns are antistatic yarns comprising at least one of PPS and PEEK.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for preparing vanadium dioxide composite powders, comprising the following processes:
process (1) dispersing vanadium nanopowders with a chemical composition of V1\u2212xMxO2 into a dispersion medium A to obtain a mixture A;
process (2) adding dispersion-assisting agents and organic modifiers for forming organic modifying long-chain molecules on a surface of the vanadium dioxide nanopowders into the mixture A and stirring until fully, evenly mixed to obtain a mixture B; and
process (3) drying the mixture B to obtain the vanadium dioxide composite powders, the surfaces of which are grafted with organic modifying long-chain molecules; wherein M represents doping elements;
0\u2266x\u22660.5; and
a weight of the organic modifying long-chain molecules is 0.1\u02dc50% of that of the vanadium dioxide nanopowders.
2. The method for preparing vanadium dioxide composite powders according to claim 1, wherein the weight of the organic modifying long-chain molecules is 1\u02dc10% of that of the vanadium dioxide nanopowders.
3. The method for preparing vanadium dioxide composite powders according to claim 1, wherein the length of the organic modifying long-chain molecules is 0.1 nm\u02dc100 nm.
4. The method for preparing vanadium dioxide composite powders according to claim 1, wherein
the organic modifying long-chain molecules are functionalized organic long chains, or long-chain alkyls; and
the functionalized organic long chains are polyacrylic acid groups, polyvinyl alcohol groups, epoxy groups, long-chain alkylamino groups, halogenated long-chain alkyls, andor carboxylated long-chain alkyls.
5. The method for preparing vanadium dioxide composite powders according to claim 1, wherein the vanadium dioxide powders are rutile vanadium dioxide powders, with a phase transition temperature adjustable in a range of \u221220\u02dc70\xb0 C.
6. The method for preparing vanadium dioxide composite powders according to claim 1, wherein a particle size of the vanadium dioxide composite powders is 200 nm or less.
7. The method for preparing vanadium dioxide composite powders according to claim 1, wherein the dispersion medium A in process (1) is ethanol, isopropanol, chloroform, dimethylformamide, dimethyl sulfoxide, dichloroethane, andor acetone.
8. The method for preparing vanadium dioxide composite powders according to claim 1, wherein in process (2), a weight ratio between the vanadium dioxide nanopowders and the dispersion medium A is 1:1\u02dc1:20.
9. The method for preparing vanadium dioxide composite powders according to claim 1, wherein the organic modifiers added in process (2) are stearic acid, polyacrylic acid, silane coupling agents, aluminate coupling agents, andor titanate coupling agents.
10. The method for preparing vanadium dioxide composite powders according to claim 1, wherein an addition amount of the organic modifiers is 0.05\u02dc5 wt % of the mixture A.
11. The method for preparing vanadium dioxide composite powders according to claim 1, wherein in process (2), the dispersion-assisting agents are one or more agents selected from the group consisting of polyvinyl alcohol, polyvinylpyrrolidone, organically modified polysiloxane dipropylene glycol monomethyl ether solution, silicone surfactants, andor fluorosurfactants.
12. The method for preparing vanadium dioxide composite powders according to claim 11, wherein an addition amount of the dispersion-assisting agents is 0.02\u02dc2 wt % of the mixture A.
13. A method for preparing a vanadium dioxide powder slurry, comprising the process (1), process (2), and process (3) of the method for preparing vanadium dioxide composite powders as claimed in claim 1, further comprising:
process (4) dispersing the vanadium dioxide composite powders obtained in process (3) into a dispersion medium B to obtain the vanadium dioxide powder slurry.
14. The method for preparing the vanadium dioxide powder slurry according to claim 13, wherein the dispersion medium B is one or more solvents selected from the group consisting of deionized water, ethanol, propanol, isopropanol, ethyl acetate, toluene, and butanone.
15. The method for preparing the vanadium dioxide powder slurry according to claim 13, wherein a weight ratio between the vanadium dioxide composite powders and the dispersion medium B is 1:1\u02dc4:1000.
16. The method for preparing the vanadium dioxide powder slurry according to claim 14, wherein the weight ratio between the vanadium dioxide composite powders and the dispersion medium B is 1:10\u02dc1:100.
17. A method for preparing a vanadium dioxide coating for intelligent temperature control, comprising the process (1), process (2), process (3), and process (4) of the method for preparing the vanadium dioxide composite powder slurry as claimed in claim 13, further comprising:
process (5) mixing the vanadium dioxide powder slurry obtained in process (4), a polymer emulsion, and coating additives together to form a mixture and coating the mixture on a substrate to form the vanadium dioxide coating for intelligent temperature control.
18. The method for preparing the vanadium dioxide coating for intelligent temperature control according to claim 17, wherein
the polymer emulsion is an aqueous dispersion or an emulsion of polymer resin; and
the polymer resin is one or more resins selected from the group consisting of polyacrylic acid resins, polyester resins, polyurethane resins, silicone resins, alkyd resins, and epoxy resins.
19. The method for preparing the vanadium dioxide coating for intelligent temperature control according to claim 17, wherein the coating additives include coalescing agents, wetting-assisting agents, defoaming agents, thickening agents, andor levelling agents.
20. The method for preparing the vanadium dioxide coating for intelligent temperature control according to claim 17, wherein the mixture is coated on the substrate by spraying, blade coating, brush coating, curtaining, or roller coating.
21. (canceled)
22. (canceled)
23. (canceled)