2322results about "Cellulosic plastic layered products" patented technology

The invention discloses a hydrophobic-hydrophilic Janus water collecting film and an efficient preparation method thereof, and belongs to the field of water collecting materials. An electrostatic spinning process is adopted, and a hydrophobic polymer is accurately deposited on the surface of a hydrophilic substrate in the form of a nanofiber array, so that the Janus composite membrane with an asymmetric wetting gradient structure is successfully constructed. The unique double-sided wettability difference drives the liquid drops to realize directional transmission, and the core mechanism of the liquid drops is derived from capillary force regulation and control caused by interfacial wetting potential energy difference. The Janus membrane shows excellent performance in the aspect of air moisture trapping, the ultra-fast moisture absorption characteristic and the surface regeneration capacity are achieved, and compared with a traditional single-layer hydrophilic membrane, the water collecting efficiency is remarkably improved by 110%. A one-step forming process is adopted for preparation, the diameter of the nanofibers is controllable, complex post-treatment procedures are not needed, and energy consumption required by equipment is low. The high-performance water collecting film has important application value in the fields of atmospheric water taking in arid regions, dehumidification of precise instruments and the like.

The present invention is used in the technical field of functional textile materials. Disclosed are a composite fiber-based protective material, and a preparation method therefor and the use thereof. The composite fiber-based protective material comprises a unidirectional moisture-guiding fiber membrane, a bacteriostatic sweat-absorbing layer and a waterproof moisture-permeable membrane, which are sequentially stacked, wherein the unidirectional moisture-guiding fiber membrane comprises a hydrophobic fiber membrane and a hydrophilic fiber membrane sandwiched between the hydrophobic fiber membrane and the bacteriostatic sweat-absorbing layer, and the average pore size of the hydrophobic fiber membrane is larger than the average pore size of the hydrophilic fiber membrane. The average pore size of the hydrophobic fiber membrane is 10-18 μm; and the average pore size of the hydrophilic fiber membrane is 1.0-2.3 μm. The composite fiber-based protective material is prepared from the unidirectional moisture-guiding fiber membrane, the bacteriostatic sweat-absorbing layer and the waterproof moisture-permeable membrane by means of a lamination process. In addition to waterproofness and moisture penetrability, the composite fiber-based protective material also has biodegradability and a bacteriostatic effect.

The invention relates to an anti-tear and anti-deformation cashmere blended fabric and a preparation method thereof. The fabric comprises an inner layer, an anti-tear layer and a surface layer which are arranged in sequence, the anti-tearing layer comprises a first supporting layer and a second supporting layer which are correspondingly arranged on the surface layer and the inner layer, concave sections and hot-pressing protruding sections are alternately arranged on the first supporting layer and the second supporting layer, and the concave sections and the hot-pressing protruding sections on the first supporting layer and the second supporting layer are symmetrically arranged. Placing cavities are formed between the concave sections of the first supporting layer and the second supporting layer, and an anti-tearing piece is arranged between the interiors of every two adjacent placing cavities. The anti-tearing layer is arranged between the inner layer and the surface layer, so that the anti-deformation effect, the anti-tearing effect and the down-proof effect of the fabric are improved, and the fabric is not prone to deformation after being washed with water for multiple times or under the action of external force, can still keep a good shape, is not prone to tearing, is more durable, is good in down-proof effect and can be used as the fabric of the down jacket.

The present invention relates to a nail sticker which is curable by ultraviolet ray and the lower surface of the nail sticker before being cured by the ultraviolet ray includes a curved surface that the center of the nail sticker is upwardly curved.

The invention relates to the field of cooling of human body protective clothing, in particular to a cooling fabric based on phase change microcapsules. The cooling fabric comprises a polyester fiber layer, a phase change microcapsule layer and a PTFE waterproof breathable film layer. The polyester fiber layer is made of skin-friendly polyester fibers, has excellent moisture absorption and sweat releasing performance and can improve wearing comfort. The phase-change microcapsule layer is formed by uniformly embedding microcapsules coated with a phase-change material into the textile structure, and absorbs heat and generates phase change when the environment temperature rises, so that the temperature of the fabric is reduced; the PTFE waterproof breathable film layer has waterproof and breathable functions, can prevent external liquid from permeating, allows water vapor to permeate, and enhances environmental adaptability. By optimizing the spinning method of the phase-change microcapsules, the phase-change heat exchange efficiency can be improved while the air permeability of the fabric is kept, and the cooling performance of the fabric at high temperature is ensured. The fabric can be widely applied to high-temperature work clothes, outdoor sportswear and intelligent temperature control textiles, and has the advantages of being high in temperature adjusting capacity, comfortable, breathable and the like.

A water evaporation dry and comfortable refrigeration cap comprises a main body part, a cooling area is arranged on the main body part, and the cooling area comprises an outer layer, an inner layer and a water absorption layer arranged between the outer layer and the inner layer; the outer layer is a screen cloth layer, a plurality of meshes are formed in the outer layer, and the inner layer is ice silk cloth; the water absorption layer is made of one or two of PVA absorbent cotton and SAF absorbent cotton. Efficient refrigeration and cooling are achieved through the simple structural design, and the air conditioner is easy and convenient to manufacture, low in cost, energy-saving, environmentally friendly and high in popularization significance.

The invention relates to the technical field of composite non-woven fabrics, and discloses a composite non-woven fabric with a directional arrangement structure, the composite non-woven fabric comprises a first fiber web layer, a second fiber web layer and a third fiber web layer, the second fiber web layer is a yarn net structure formed by warp knitting and weft knitting of viscose long fibers, the first fiber web layer is provided with a plurality of first protrusions, and the third fiber web layer is provided with a plurality of second protrusions. At least one first guide hole penetrating through the fiber web layer is formed in an area enclosed by the plurality of first bulges; at least one part of fibers of the first fiber layer extend towards the direction of the second fiber layer and extend into the second fiber layer, and at least one part of fibers of the second fiber layer extend towards the direction of the third fiber layer and extend into the third fiber layer. Due to the fibers and the guide holes which are arranged directionally, the effects of improving the liquid absorption wetting speed of the composite non-woven fabric and shortening the drying time are achieved, energy is saved, the production efficiency is improved, and therefore the production cost is effectively reduced.

The invention provides a preparation method of a full-hydrophilic composite material with a pore diameter gradient and a one-way moisture conduction function. A double-layer hydrophilic composite layer with a pore difference structure is prepared by adopting a means of combining an electrostatic spinning process and a spunlace non-woven process, so that the one-way moisture conduction function is realized. The preparation method comprises the following steps: firstly preparing a hemp / viscose spunlace non-woven layer, then preparing a polylactic acid / chitosan nanofiber membrane through an electrostatic spinning process, and finally compounding the hemp / viscose spunlace non-woven layer and the polylactic acid / chitosan nanofiber membrane to prepare the composite material with the one-way moisture conduction function. The two hydrophilic layers with fiber diameter difference and pore size difference are compounded through a double-layer assembly strategy, the composite material with a brand-new structure and a one-way moisture guiding function is constructed, the composite material has a good one-way liquid conveying function, the continuous one-way moisture guiding function is achieved, and the composite material is suitable for large-scale popularization and application. Wide application prospects are realized in the fields of textile clothing, medical and health materials and the like.

The present invention is directed to a capsule (1) for beverage preparation, comprising a cup-shaped body (2) of moulded cellulose pulp and a closing membrane (5) attached to a peripheral rim (4) of said body (2). The capsule further comprises a multilayer polymeric liner (3) attached to the inner surface of the cellulose pulp body (2), said liner comprising: (i) an outermost polymeric layer (7), (ii) a first tie layer (8), (iii) a barrier layer (9), (iv) a second tie layer (10), (v) an innermost polymeric layer (11), In which liner, - the thickness of the outermost layer (7) and the thickness of the innermost layer (11) are comprised between 10 and 100 pm and are preferably identical; - the elongation at break of the outermost layer (7) is higher than the elongation at break of the innermost layer (11); - The melt flow rate (MFR) of the outermost layer (7) measured at 150°C during 10 minutes with a pressure of 2.16 kg, is lower than the melt flow rate (MFR) of the innermost layer (11), measured at 190°C during 10 minutes with a pressure of 2.16 kg; - The melting point temperature of the outermost layer (7) is lower than the melting point temperature of the innermost layer (11), and in which, the outermost layer serves as an adhesive to the cellulose pulp of the capsule body.

The invention provides a heat-storage warm-keeping down-locking layered fabric and a down jacket. The heat-storage warm-keeping down-locking layered fabric sequentially comprises a skin-friendly layer, a liner cloth layer and a heat-storage warm-keeping down-locking layer from inside to outside, and the heat-storage warm-keeping down-locking layer is prepared by napping a heat-storage warm-keeping fabric; yarns for weaving the heat-storage and warm-keeping fabric are heat-storage and warm-keeping fiber / hollow polyester fiber / wool fiber blended yarns; the heat-storage warm-keeping fiber comprises polyester and a heat storage agent, and the preparation method of the heat storage agent comprises the following steps: firstly loading a polyethylene glycol / nano molybdenum disulfide composite material by adopting porous silicon dioxide microspheres, then mixing with a mixture containing silica sol and nano metal silver, and performing vacuum drying to obtain the heat storage agent. The heat-storage warm-keeping down-locking layered fabric has excellent heat-storage warm-keeping effects, can lock down, has a good antibacterial effect, and has a very good application effect when being used as a lining fabric of a down jacket.

To provide a nonwoven fabric for liquid impregnation, a nonwoven fabric for a wiper that is high in dirt collection ability.SOLUTION: A nonwoven fabric for an objective wiper is a fabric layer (a) which includes a first fabric layer, a second fabric layer, and an intermediate fabric layer situated between the first fabric layer and the second fabric layer, one of the first fabric layer and second fabric layer is a fiber layer a which has 50 mass percent or more of a hydrophilic cellulose fiber, and the intermediate fabric layer is a wet type nonwoven fabric including 50 mass percent or more of the hydrophilic cellulose fiber, and / or of a short fiber having a fiber length of 20 mm or less. Each fabric layer is integrated by cross connection of the fibers, where a MD 5% elongation stress index for which 5% elongation stress (N / 5 cm) in a MD direction under a dry condition is divided by basis weight (g / m2) of the nonwoven fabric is 0.150 or higher, and / or 5% elongation stress (N / 5 cm) in the MD direction under a humid condition divided by the basis weight (g / m2), namely MD 5% elongation stress index is 0.050 or higher.SELECTED DRAWING: None

The present invention provides a reflection film which has excellent curved surface followability during bonding to an object to be bonded, exhibits excellent abrasion resistance after bonding, and further has excellent reflection characteristics; a windshield glass; a laminate; and an image display system. The reflection film of the present invention includes, in the following order, a pressure-sensitive adhesive layer, a reflective layer reflecting light in a wavelength-selective manner, and a hardcoat layer.

The invention discloses electromagnetic shielding aerogel with a double-layer structure and a preparation method of the electromagnetic shielding aerogel, the electromagnetic shielding aerogel is composed of cellulose nanofibers, hollow cobalt nickel carbon nanocages and few-layer MXene, and the electromagnetic shielding aerogel is of the double-layer structure. The electromagnetic shielding aerogel not only has excellent kilomegahertz shielding efficiency with low reflection characteristic, but also has great application potential in the fields of lightweight multifunctional electromagnetic shielding composite materials, special electromagnetic protection facilities, electromagnetic stealth materials, severe environment resistant electronic equipment and the like.

[Problem] To provide a novel polarizing plate that inhibits a poor external appearance of a polarizing film due to thermal contraction, and that excels in durability. [Solution] This polarizing plate comprises a polarizing film composed of a polyvinyl alcohol–based resin, and a supporting base material layered on at least one of the surfaces of the polarizing film with a bonding layer therebetween, said supporting base material being light-transmitting, and is characterized in that the bonding layer is composed of a molecular bonding agent that binds the polarizing film and the supporting base material together via a chemical bond.

The invention belongs to the field of battery diaphragms, and particularly provides a preparation method of a solid electrolyte composite material, which comprises the following steps: (S1) mixing a polymer, a plasticizer and a lithium salt, adding into a second solvent, dissolving and stirring to obtain an electrostatic spinning precursor solution; (S2) depositing the electrostatic spinning precursor solution on the surface of a receiver through electrostatic spinning to obtain a fiber membrane, and separating the fiber membrane from the receiver; and (S3) soaking the fiber membrane in a dispersion liquid, and performing dispersion treatment to obtain the nanofiber composite material, specifically, a battery prepared from the solid electrolyte composite material provided by the invention has excellent electrochemical performance, can still maintain a high capacity retention ratio after multiple cycles, has excellent rate capability, and can be applied to the field of lithium ion batteries, such as lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries, lithium ion batteries and lithium ion batteries. And the long-term stability and safety of the operation of the battery can be ensured.

The present invention relates to a lid film for airtight sealing of beverage capsules, in particular coffee capsules, comprising excellent barrier properties against gas ingress, water or humidity and oxygen: i.) at least one layer of paper, ii.) at least one layer containing polylactic acid, iii.) at least one layer of metallization, iv.) at least one sealing layer containing at least one thermoplastic polymer made from glucose, lignin or cellulose.

There are provided a mold release film having excellent handleability and mold releasability even when used in a high-temperature environment, a laminate thereof, and an application thereof. A mold release film is prepared to include at least a substrate layer and a mold release layer directly or indirectly layered on at least one surface of the substrate layer. The mold release layer contains a polypropylene-based resin. The mold release film may have a thermal shrinkage rate of approximately 4.0% or less when subjected to a heating treatment under conditions of 160° C. and 15 minutes. Further, a mold release film may be prepared to include at least a mold release layer containing a polypropylene-based resin. The mold release film has a thermal shrinkage rate of 4.0% or less when subjected to a heating treatment under conditions of 160° C. and 15 minutes.

The invention relates to a non-irritant, lifting and tightening mask cloth as well as a preparation method and application thereof. The mask cloth comprises a cellulosic fiber surface layer, an elastic middle layer and a cellulosic fiber bottom layer which are sequentially laminated, the cellulose fiber surface layer and the cellulose fiber bottom layer are both made of fine denier viscose fibers, the fineness of the fine denier viscose fibers is 0.5 dtex-1. 0 dtex, and the length of the fine denier viscose fibers is 38-52 mm; the elastic middle layer is made of PU fibers. The PU fiber is used as the elastic middle layer, the cellulose fiber layers are used on the two sides, the middle layer has good elasticity, after the middle layer is made into the membrane cloth, good elasticity can be provided, the cellulose fiber layers can make the fiber very soft by controlling the fineness, and the prepared membrane cloth is very fine and soft in surface and can provide good skin feeling; the cellulose fiber layer is attached to the skin, so that the finally obtained mask cloth is very friendly to the skin, has no irritation, and is safer and milder.

The utility model provides a fabric and a textile, and relates to the technical field of textiles. The fabric comprises a first functional layer and a second functional layer, the first functional layer is arranged on one side of the second functional layer, the first functional layer is formed by first yarns, the first yarns comprise functional fibers, the functional fibers comprise a core layer and a sheath layer, the sheath layer is arranged on the periphery of the core layer, and the surface of the sheath layer comprises a plurality of diffuse reflection parts; the second functional layer is formed by second yarns, and the second yarns have at least one of a quick-drying function, a ventilation function and a cool feeling function. The functional fiber surface of the first functional layer comprises a plurality of diffuse reflection parts, and the diffuse reflection parts can reduce specular reflection on the surface of the fabric, so that the sweat mark hiding capability of the fabric is improved.

An object of the present invention is to provide a cover film having more excellent adhesiveness to a base material in a case where a bonded body of the cover film and the base material is stored for a long period of time. The cover film of the present invention includes a support and a polymer layer containing a polymer, in which the support contains a cellulose triacetate derived from wood pulp, and the polymer layer satisfies the following requirement 1. Requirement 1: residual rate of the polymer layer is 10% to 50% by mass before and after the polymer layer is immersed in xylene at 25°C after being peeled off from the cover film.

The utility model discloses a composite knitted fabric, which relates to the technical field of textile fabrics, and is characterized in that the composite knitted fabric comprises a base layer and a surface layer, the base layer is provided with a plurality of first air holes, the surface layer is provided with a plurality of second air holes communicated with the first air holes, and the edges of the first air holes and the second air holes are circumferentially provided with a plurality of open slots; a plurality of elastic gaskets are arranged between the base layer and the surface layer, the elastic gaskets are bonded between the first air holes and the second air holes, and through holes communicated with the first air holes and the second air holes are formed in the centers of the elastic gaskets. According to the composite knitted fabric, the first air holes and the second air holes can actively deform when being stressed and can automatically recover, so that the first air holes and the second air holes can be prevented from being thoroughly expanded and deformed by external force, the knitted fabric has good shape preserving performance, and due to the arrangement of the modal fibers, the composite knitted fabric has good skin-friendly performance.

The invention provides a sustainable power generation fiber material based on moisture absorption-evaporation circulation and a preparation method thereof. The method comprises the following steps: S1, preparing a moisture absorption layer; s2, preparing a nanofiber moisture removal layer through an electrostatic spinning technology; s3, preparing an evaporation layer; and S4, the active metal electrode is installed on the moisture absorption layer, the graphite electrode is installed on the evaporation layer, and the sustainable power generation fiber material based on moisture absorption-evaporation circulation is integrated. According to the material prepared by the invention, the three-layer asymmetric fiber structure design of'moisture absorption-moisture removal-evaporation 'and gradually increased electronegativity are utilized, the functions of moisture absorption, sweat releasing and water photovoltaic power generation are realized at the same time, voltage output exceeding 12.5 V can be provided, the material is combined with masks, clothes and the like, the wearing comfort can be met, an energy collection system can be constructed, and the material is suitable for popularization and application. Direct power supply for commercial electronic equipment is realized.

The utility model relates to the field of fabrics, in particular to a moisture-absorbing and sweat-releasing blended fabric. The moisture-absorbing and sweat-releasing blended fabric comprises a moisture-absorbing layer and a breathable layer, wherein the moisture absorption layer is formed by weaving a plurality of first yarns and a plurality of second yarns; the first yarns comprise polyester fibers and multi-strand yarns wrapping the polyester fibers; the multi-strand yarn is formed by twisting tencel fibers and silver ion antibacterial fibers; the breathable layer is formed by weaving a plurality of third yarns, and the third yarns are formed by twisting linen fibers and cashmere fibers; a plurality of ventilation holes are formed in the ventilation layer; the first yarns have high elasticity, comfort, hygroscopicity and antibacterial activity, and the second yarns also endow the moisture absorption layer with excellent moisture conductivity; the breathable layer formed by weaving the third yarns is provided with a plurality of breathable holes, so that the moisture absorption layer after moisture absorption can be quickly dried, and the blended fabric has the excellent effects of moisture absorption, sweat releasing and quick drying.

The invention discloses a high-comfort-degree pillowcase blended fabric, and particularly relates to the field of articles for daily use, the high-comfort-degree pillowcase blended fabric comprises an outer fabric layer, a middle spacing layer and an inner fabric layer, and the outer fabric layer and the inner fabric layer are connected through the middle spacing layer; and the outer fabric layer, the middle spacing layer and the inner fabric layer jointly form a three-dimensional spacer fabric with a multi-layer structure. According to the invention, through the multi-layer structure design, a three-dimensional pore structure is formed, air flow and heat dissipation are promoted, the moisture-permeable and air-permeable performance is excellent, and comfort and hygiene in the use process are ensured; the outer layer, making contact with the skin, of the cloth is made of cool fibers, the middle spacing layer achieves dynamic supporting and long-term shape stability through the composite design of a rigid framework and elastic driving, and the use comfort is remarkably improved; by means of the moisture and air permeability design of the pillowcase, the use experience is further improved, stuffiness and discomfort are avoided, and the air permeability, the moisture permeability, the cool feeling and the supporting performance are comprehensively improved in combination with the synergistic effect of specific fiber materials.

The invention provides a phase difference film capable of suppressing contrast unevenness in a liquid crystal display device just taken out from a high-humidity environment, and a polarizing plate and a liquid crystal display device provided with the phase difference film. The phase difference film according to the present invention has a first layer, a second layer, and a third layer in this order, each of the first layer, the second layer, and the third layer contains an acetyl cellulose and fine particles, the degree of substitution of acetyl groups in the acetyl cellulose contained in the second layer is in the range of 2.0-2.6, the second layer further contains a polyester having hydroxyl groups at both ends, and the third layer contains a polyester having hydroxyl groups at both ends. The content (mass%) of the fine particles in the second layer is greater than the content (mass%) of the fine particles in the first layer and the third layer.

The invention provides photo-thermal moisture absorption gel and a preparation method thereof, and belongs to the field of moisture absorption gel. The photo-thermal moisture absorption gel provided by the invention comprises an aerogel carrier and moisture absorption salt loaded on the aerogel carrier, the aerogel carrier comprises a first photo-thermal aerogel layer, a cellulose network aerogel layer and a second photo-thermal aerogel layer which are arranged in sequence; each of the first photo-thermal aerogel layer and the second photo-thermal aerogel layer comprises cellulose network aerogel and a photo-thermal conversion material loaded on the cellulose network aerogel; pore channels penetrating through the first photo-thermal aerogel layer, the cellulose network aerogel layer and the second photo-thermal aerogel layer are formed in the aerogel carrier. The photo-thermal moisture absorption gel provided by the invention is high in reproducibility, environment-friendly and pollution-free, and has high moisture absorption capacity and rapid moisture absorption capacity.

The utility model discloses a high-elastic hygroscopic composite fabric, which relates to the technical field of textile fabrics. The key points of the technical scheme are: the high-elastic hygroscopic composite fabric comprises a hygroscopic inner layer and an elastic outer layer fixedly connected to each other, the hygroscopic inner layer is fixedly connected with a plurality of hygroscopic parts, the hygroscopic parts are fixedly connected with a plurality of moisture conducting parts, the elastic outer layer is provided with a plurality of I-shaped cracks corresponding to the positions of the moisture conducting parts, and a plurality of moisture conducting lines are fixedly connected on the elastic outer layer. Through the cooperation of the moisture conducting parts and the cracks, sweat can flow toward more areas, so that the contact between the flowing air and the sweat is more sufficient, and the moisture dissipation and air permeability of the elastic outer layer can be enhanced. The moisture conducting lines not only directly contact the skin to enhance the absorption, derivation and diffusion of the liquid, but also make the structure more stable. The utility model utilizes the characteristic of polypropylene fiber that it conducts moisture unilaterally toward polyester fiber to improve the moisture absorption and quick-drying performance of the composite fabric.

The present invention addresses the problem of providing: a display device having both visibility and folding resistance after a key test; an optical film; and a method for manufacturing the optical film. This display device has at least a light-emitting element and a color filter, and is characterized in that the display device has an optical film containing cellulose acetate and a filler of a metal oxide or a metal salt, the degree of substitution of acetyl groups in the cellulose acetate is within the range of 2.3-3.0, and the degree of substitution of acetyl groups in the cellulose acetate is within the range of 2.3-3.0. The metal oxide or metal salt filler has an aspect ratio in the range of 110-2000.

The present invention belongs to the field of the design and preparation of electromagnetic shielding materials. Disclosed are a modularized full-spectrum efficient electromagnetic shielding flexible fabric and a preparation method therefor. The preparation method of the present invention comprises the following steps: (1) subjecting a fabric to a metal deposition treatment by using a magnetron sputtering system, so as to obtain a flexible conductive fabric A; (2) subjecting the surface of a polymer thin film to a metal deposition treatment by using a vacuum coating technology, so as to obtain a high-toughness conductive thin film B; (3) uniformly mixing a carbon-based wave-absorbing material, a polymer and a solvent, and curing the mixture, so as to obtain a wave-absorbing layer C having a certain thickness; and (4) subjecting the functional modules obtained in step (1), step (2) and step (3) to specific permutation, combination and packaging, so as to obtain a modularized full-spectrum electromagnetic shielding flexible composite fabric.

The invention relates to a method for producing a multilayer structure comprising an organic barrier layer, adhesive layer and substrate, comprising the following steps (a) providing a carrier film, (b) wherein a major part of the surface of the carrier film is provided with a release agent chosen from (i) an organic release layer, which organic release layer has the capacity to effect a releasable bond from the surface of the carrier film and a non-releasable bond with the surface of an organic barrier layer to be applied on the release layer and / or (ii) a metal layer on the carrier film which adheres stronger to the carrier film than to the organic barrier layer, (c) providing an organic barrier layer on the release agent, (d) providing an adhesive layer on the organic barrier layer, and bonding the organic barrier layer with said adhesive to a substrate, and (e) stripping said carrier film from the multilayer structure.