2642results about "Liquid repellent fibres" patented technology

Apparatuses and methods are described that involve the deposition of polymer coatings on substrates. The polymer coatings generally comprise an electrically insulating layer and/or a hydrophobic layer. The hydrophobic layer can comprise fused polymer particles have an average primary particle diameter on the nanometer to micrometer scale. The polymer coatings are deposited on substrates using specifically adapted plasma enhanced chemical vapor deposition approaches. The substrates can include computing devices and fabrics.

Additive particles may be employed in sufficient amounts to impart superhydrophobicity to a coating system in which the additive particles are incorporated. The additive particles include carrier microparticles and a dense plurality of nanoparticles adhered to the surfaces of the carrier microparticles (e.g., preferably by electrostatic deposition or covalent bonding). The additive particles are advantageously incorporated into a coating material (e.g., a polymeric material) in amounts sufficient to render a substrate surface superhydrophobic when coated with the coating material. The substrate may be rigid (e.g., glass, ceramic or metal) or flexible (e.g., a polymeric film or sheet or a fabric). In some preferred embodiments, both the microparticle and nanoparticles are formed of silica and are surface treated with a hydrophobic treatment so as to impart superhydrophobic properties thereto. Especially preferred are particles treated with silicone fluid comprised of a polysiloxane and/or a perfluoro silane having between 1 and 40 carbon atoms.

A fluorochemical composition for rendering fibrous substrates oil repellent, water repellent, and/or stain repellent and comprising a fluorinated polymer dispersed in water or dissolved or dispersed in an organic solvent, the fluorinated polymer comprising units derived from (i) a mixture of two or more fluorinated polyether monomers that differ in at least their molecular weight, the fluorinated polyether monomers having an ethylenically unsaturated group and a perfluorinated polyether group and wherein at least 90% by weight of the mixture consists of fluorinated polyether monomers that have a perfluorinated polyether group having a molecular weight of at least 750 g/mol and (ii) one or more units derived from one or more co-monomers other than a fluorinated polyether monomer and wherein the co-monomers comprise at least one non-fluorinated monomer. Also, method for treating fibrous substrate with such composition, fluorinated polyether monomers, and fluorinated polymers derived from such monomers.

A fabric treatment composition that includes a hydrophobic agent with a melting point or glass transition temperature below 100° C. and optionally, a fluoropolymer, that imparts fabric protection benefits, including improved stain and soil resistance, oil repellency, water repellency, softness, wrinkle and damage resistance, and better handfeel to treated fabrics. Compositions may further include a zeta potential modifier in an amount sufficient to adjust the zeta potential of the composition to be positive and greater, than zero millivolts. The composition can be used as a pretreatment prior to drying or ironing, through soaking or direct spray application, or used prior to or during the drying cycle of an automatic drying machine or clothing refresher machine, or used prior to or in conjunction with an ironing device. The fabric treatment is complete when the fabric treated by contact with the protective composition is then cured by drying and/or heating. The invention further includes a kit providing a means for convenient dispensing of the protective composition to effect treatment and curing of fabric articles.

A method is provided for the application of a finishing layer to a textile support material. A water repellent or oil repellent layer, a so-called finishing layer, is applied to a textile support material selected from the group of fibers, tissues, and fabrics. The water repellent or oil repellent finishing layer comprises at least two water repellent or oil repellent components wherein a first component comprises one or more dispersants and a second component comprises one or more dispersed phases or colloids, and wherein the dispersant and the dispersed phase are present in the gel state.

A composition of matter is a plurality of solid particles of at least 100 nm to about 10 μm in size having a plurality of nanopores where at least some of the nanopores provide flow through porosity, and the surface of the particles displays a plurality of spaced apart nanostructured features with a contiguous material protruding at the surface and optionally at least one interpenetrating recessing contiguous material. The particles are superhydrophobic when the protruding material is hydrophobic or a hydrophobic coating conforms to the surface of the particle. Articles with superhydrophobic surfaces can be formed by the coating of the particles on a solid substrate.

The use of perfluorinated polymers and/or fluorinated ionomers as surfactant emulsifiers in emulsion polymerization of fluorinated monomers.

A fabric treatment composition that includes at least one zeta potential modifier and a hydrophobic agent with a melting point or glass transition temperature below 100° C. that imparts fabric protection benefits, including improved stain and soil resistance, oil repellency, water repellency, softness, wrinkle and damage resistance, and better handfeel to treated fabrics. Treatment compositions can be used as a pretreatment prior to washing, through soaking, or added to the treatment liquor, that is either the wash or rinse cycle of an automatic washing machine, to first provide and then maintain and restore the beneficial fabric protection benefits imparted to the fabrics during a first treatment operation. The fabric treatment is complete when the fabric is cured by drying and/or heating. Following use of a first treatment composition, protective benefits are maintained and restored by means of a second treatment operation employing a second treatment composition with lower active levels of the protective agents to provide for economical and continual maintenance of the imparted fabric protection benefits through a delivered second fabric treatment benefit with each subsequent treatment operation employing the fabric treatment compositions.

A semi-absorbent, semi-resistant, breathable fabric includes a single-layer having a first, hydrophilic side that absorbs water, and a second, hydrophobic side; wherein the first, hydrophilic side of the single-layer fabric quickly spreads out a liquid that is absorbed laterally to a wider area such that the absorbed liquid does not seep or pass through to the second, hydrophobic side of the single-layer fabric under gravitational force. A method of making a semi-absorbent, semi-resistant, breathable fabric includes: subjecting a first side of a single-layer fabric to a hydrophilic amino functional polysiloxane softener; treating a second opposite side of the fabric with a fluorocarbon compound under low pressure such that the fluorocarbon compound penetrates no more than half of the fabric thickness; and drying and curing the fabric, preferably at a temperature of about 145° C. to 155° C. for about three minutes to about five minutes.

A bandage comprising a substrate having a first surface with a plurality of superhydrophobic particles attached to the first surface. The plurality of superhydrophobic particles can be porous diatomaceous earth particles having a hydrophobic layer conforming to the surfaces of the DE particles, where the hydrophobic layer is bound to the DE particles. The plurality of attached superhydrophobic particles can render the first surface superhydrophobic, while a second surface opposite the first surface can be hydrophilic or hydrophobic. The substrate can be breathable in order to maintain skin health for the tissue underlying the bandage. The substrate can be selected from porous films, apertured films, textiles, nonwoven materials, impregnated composites thereof, and combinations thereof.

Fiber, fabric, film, molded or blown article comprising a water- and oil-repellent composition comprising a melt blend of components (a) and (b) in which:

• • (a) comprises a repellency-imparting, fluorochemical composition comprising at least one fluorine-containing aromatic ester oligomer comprising
    • (1) at least two repeat units derived or derivable from the reaction of at least one dicarboxylic acid (or a derivative thereof) and at least one polyol, with the proviso that either the dicarboxylic acid (or derivative) or the polyol (or both) is aromatic or heteroaromatic, and
    • (2) fluorochemical endgroups derived or derivable from the reaction of
      • (i) the dicarboxylic acid (or derivative) and at least one fluorine-containing monoalcohol, or
      • (ii) the polyol and at least one fluorine-containing monocarboxylic acid; and
  • (b) comprises a treatable substrate material; with the proviso that, when the treatable substrate material comprises a mixture of at least two polymers, the mixture is non-stratifying.

A method for treating surfaces of textile is disclosed. A coating solution, in which a polymer with reactive groups is utilized to give various functions, such as hydrophobicity, anti-bacteria or hydrophilicity (hygroscopicity) is formed. The coating solution with different viscosities, specially low viscosity, 100 cps or less, can be continuously coated onto a surface of the textile by employing a surface treating technique of gravure coating and appropriately adjusting the gravure meshes. After drying, a highly durable, washable and firm textile with single or multi-functions, such as outer hydrophobic surface and inner anti-bacterial and (or) hydrophilic (hygroscopic) surface.

A composition comprising (A) a copolymer which comprises (I) repeating units which are derived from a monomer having a fluoroalkyl group, a carbon-carbon double bond, (II) optional repeating units which are derived from a monomer having at least two urethane or urea bonds and a carbon-carbon double bond, but no fluorine atom, (III) optional repeating units which are derived from a monomer, the homopolymer of which having a glass transition temperature (Tg) of 50° C. or less, (IV) optional repeating units which are derived from a monomer having a hydrophilic group and a carbon-carbon double bond, and (V) optional repeating units which are derived from a monomer having a chlorine atom and a carbon-carbon double bond; and (B) a film-forming auxiliary can impart high water and oil repellency by drying at room temperature (0 to 30° C.) without requiring a heat treatment step.

The invention discloses a magnetic response type high-efficiency oil-water separation fiber membrane and a preparation method thereof, and belongs to the field of functional micro-nano fiber materials. The magnetic response type high-efficiency oil-water separation fiber membrane disclosed by the invention is prepared by the following steps: dissolving hydrophobic polymers, such as polyvinylidene fluoride, polyurethane or polycaprolactone, as main raw materials into an organic solvent to form a polymer solution; preparing a non-woven fiber membrane material prepared from micro-nano structure fibers by adopting an electrospinning method; forming a sticky polydopamine membrane through polymerization of polydopamine in an alkaline solution, and firmly attaching magnetic nanoparticles onto the surface of an electrospinning fiber membrane by adopting the sticky polydopamine membrane, so as to prepare the magnetic response type high-efficiency oil-water separation fiber membrane. The fiber membrane disclosed by the invention has a super-hydrophobic/super-oleophilic property in air, and has an excellent adsorptive property on a plurality of common oils; the preparation method of the high-efficiency oil-water separation fiber membrane, disclosed by the invention, is simple, low in energy consumption, and high in efficiency,and can be widely applied to the fields such as remote controllable efficient separation of oily wastewater, and the magnetic responsiveness is realized.

The present invention relates to methods and compositions for treating fabrics to facilitate moisture transfer from one side of the fabric to the other, and fabrics made according to such methods. The fabrics generally have one side or surface of the fabric treated with a net hydrophobic composition, whereas the opposing surface of the fabric is not treated with the net hydrophobic composition.

Provided are amphiphobic block copolymers, methods for preparing amphiphobic block copolymers, and applications thereof. Amphiphobic block copolymers can be used to prepare amphiphobic coatings on material surfaces, such as glass, printing paper or fabric. Amphiphobic block copolymers can also be used to coat particles, e.g., silica nanoparticles, which are then used to coat material surfaces. Such coated particles and uses thereof are also provided herein.

The invention provides a preparation method for a super-hydrophobic material. The method comprises the following steps: (1) modifying the integral three-dimensional structure of a substrate material by using a nanomaterial with a nanotechnology, so that the roughness of the integral three-dimensional structure of the material is increased; (2) coating the material with a low-surface-energy substance through a surface modifying technology to obtain the super-hydrophobic material. The static contact angle between the super-hydrophobic material and water is 152-158 degrees. The prepared super-hydrophobic material has superior hydrophobicity, the preparation process is simple, the reaction conditions are mild, and special machining equipment is not needed.