36results about How to "Air permeability" patented technology

A gypsum board comprises a set gypsum layer having a first face and a second face. An uncoated fibrous mat is affixed to at least one of the faces. The mat comprises a non-woven web bonded together with a resinous binder. The web comprises glass fiber consisting essentially of a major portion composed of chopped continuous glass fibers having an average fiber diameter ranging from about 8 to 25 μm and optionally a minor portion consisting essentially of at least one of small diameter glass fibers having a fiber diameter of at most about 13 μm and microfibers having an average fiber diameter ranging from about 0.05 to about 6.5 μm. The board is exceedingly durable and has a high resistance to water absorption, rendering it particularly useful for exterior insulation systems.

A woven or knit fabric containing crimped composite fibers having its air permeability enhanced by water wetting and being useful in clothes such as outerwear, which woven or knit fabric contains 10 to 100 mass % of composite fibers of side-by-side type or eccentric core sheath type composed of polyester resin component and polyamide resin component whose thermal shrinkages are different from each other, the composite fibers having crimps developed by heat treatment. The composite fibers exhibit humid crimp factor HC_F (%), as measured through a procedure comprising immersing the same in water of 30° C. for 2 hr, pulling them up, interposing them between a pair of filter papers at 30° C. in a humidity of 90% RH within 60 sec of the pulling up and applying a pressure of 0.69 mN/cm² for 5 sec, of ≧10% lower than the dry crimp factor DC_F (%) after dying by allowing them to stand still at 20° C. in a humidity of 65% RH for 24 hr, so that the woven or knit fabric exerts of the effect of air permeability enhancement by water wetting.

An opening type bone conduction earphone which eliminates headband and has a compact and simple structure comprising a magnetic body, which has an aeration hole, which is able to communicate with the outside world when wearing, at the center part of the axial direction, at least one or more dampers provided at the outer circumference of the magnetic body, and a coil bobbin, which is provided at the outer circumference of the magnetic body, accommodates the damper within a trunk part, and in which a coil is wound at the outer circumference of the trunk part, is provided.

This invention makes public a kind of moisture absorbent quick dry face fabric produced by weaving together warp and weft yarns. The warp yarn uses medium organzine polyester yarn as raw material. The weft yarn consists of A weft and B weft. A weft uses low organzine moisture absorbent desweating filament while B weft uses low organzine composite thread composed of polyester low elastic thread and spandex elastic thread. This invention also makes public the processing technique of said moisture absorbent quick dry face fabric. Said invention features soft tactility, changeable crease, distinctive lines, good conductivity, flexibility, crease resistance, air permeability, moisture absorption and sweat removal.

This invention makes public a kind of changeable imitation fur and linen face fabric weaved together from warp and weft yarns. The warp yarn uses mixed spun yarn with bamboo fiber and fine polyester as raw materials. The weft yarn uses mixed spun multiple color changeable yarn with allotropic and anisotropic polyester and adhesives as raw materials. The processing technique of this changeable imitation fur and linen is also made public. This invention features soft tactility, abrasion resistance, good drapability, air permeability, flexibility, anti-static and anti-bacterial ability.

A preform for a composite material which has high strength and excellent air permeability and hence is applicable to a high-speed die casting method and which is capable of forming a metal composite material having excellent mechanical properties by a high-speed die casting method. Also provided is a process for producing such a preform. Ceramic fibers or/and ceramic particles are mixed with a silica sol and calcium carbonate and sintered at a predetermined temperature to form a calcium/silicon sinter obtained from the silica sol and calcium carbonate. The calcium/silicon sinter coats the ceramic fibers or/and ceramic particles so that a preform having the fibers or/and the particles bound to each other by the calcium/silicon sinter is obtained. The preform for a composite material has high strength and excellent air permeability and is applicable to the high-speed die casting method capable of attaining high productivity.

A hollow fiber membrane is formed by embedding a braid having a spiral open weave of monofilaments only, to avoid a “whiskering” problem. The open weave is characterized by contiguous, circumferential, rhomboid-shaped areas of polymer film separated by monofilaments. When the braid is supported on a plasticized PVA cable having a scalloped periphery, the braid can be infiltrated with membrane polymer which, when coagulated, embeds the braid positioning it around the lumen.

The embedded spiral weave, free of any circumferentially constricting monofilament, allows the membrane to be biaxially distensible. The membrane has “give” not only in the axial or longitudinal direction but also in the radial direction. “Give” in the radial direction permits soiled membranes to be backwashed under higher pressure than in a comparable braid which is not radially distensible.

A pet anti-haze mask is characterized in that a cone-shaped mask body and connecting belts placed on the two sides of the cone-shaped mask body are included, the connecting belts are provided with neck rings, the edge of the cone-shaped mask body is arranged to be in an oval shape, an elastic belt is arranged at the edge of the oval-shaped edge, the cone-shaped mask body is provided with an interlayer, a medium layer is fixed in the interlayer of the cone-shaped mask body, at least one medium layer is arranged and is used for sterilization, a filtering layer is arranged in the interlayer of the cone-shaped mask body, and at least one filtering layer is arranged and is used for filtering away particulate matter. According to the pet anti-haze mask of the structure, the particulate matter entering the mask can be filtered away, the influence on a pet body from haze is lowered, the quality of air passing through the mask is improved, barking, biting and disorderly eating of a pet can be avoided, the health and the safety of a pet dog are guaranteed, and meanwhile the quietness and the safety of a dog-keeping environment are guaranteed.

The invention discloses a ceramic diaphragm with a multilayer composite structure and a battery using the ceramic diaphragm. The ceramic diaphragm with the multi-layer composite structure comprises an organic microporous base material, a ceramic coating layer, a three-dimensional high-temperature-resistant layer and a polymer layer; the ceramic coating layer is attached to one surface or two surfaces of the organic microporous base material, the thickness of the ceramic coating layer is 0.1-50 microns, the ceramic coating layer comprises inorganic powder and a binder, and the particle size of the inorganic powder is 5nm-50 microns; holes are distributed in the organic microporous base material; the three-dimensional high-temperature-resistant layer continuously coats the surface of the ceramic coating layer and the inner walls of the holes and comprises a high-temperature-resistant polymer and a curing cross-linking agent, and the high-temperature-resistant polymer comprises phenolic resin, urea resin, polyimide or epoxy resin; the thickness of the polymer layer is 5nm-10mu m, and the polymer layer coats on the surface of the three-dimensional high-temperature-resistant layer. The ceramic diaphragm has good adhesion with positive and negative electrodes, and the battery with the ceramic diaphragm has the advantages of high safety, long service life and the like.

The invention discloses a preparation method of a high-safety long-life ceramic diaphragm. The preparation method comprises the following steps of: 1) preparation of a polymer solution, specifically, dissolving polymer powder and ultrasonically removing bubbles to prepare a polymer solution with the mass concentration of 5-30%; 2) preparation of a three-dimensional composite ceramic diaphragm, specifically, taking an organic diaphragm base material with holes, coating the surface of the organic diaphragm base material with a layer of ceramic slurry, and drying to form a ceramic coating layer to obtain a ceramic coating diaphragm, continuously coating the surface of the ceramic coating diaphragm and the inner walls of the holes with a heat-resistant layer to obtain a three-dimensional composite ceramic diaphragm; 3) preparation of a high-safety long-life ceramic diaphragm,specifically, preparing a polymer layer with the thickness of 5nm-10mu m on the surface of the three-dimensional composite ceramic diaphragm by adopting an electrostatic spinning technology, and then drying and hot-pressing to obtain the high-safety long-life ceramic diaphragm.

Provided is a clothing fabric including through holes that pass through the fabric in a thickness direction, wherein the through holes are arranged along one direction of the fabric. A water-repellent or hydrophobic region is arranged at least at part of the fabric in contact with the through holes, and a hydrophilic region is are arranged at the other portions. A portion of the water-repellent or hydrophobic region may form groove portions. The clothes of the present invention include the above-described clothing fabric, wherein the through holes that pass through a portion of the fabric in a thickness direction are arranged along a direction of a wearer' height. Accordingly, it is possible to provide a clothing fabric and clothes using the same that can, while being water-absorbing, suppress formation of a film of a liquid even when the fabric is wet, ensure air permeability of the fabric, and always allow sweat on the skin to be evaporated on the body surface, thereby increasing the effective sweat amount, preventing exercise performance from being lowered, and allowing a person to wear the clothes with comfort even when sweating.

The invention relates to thermal underwear fabric. The thermal underwear fabric comprises raw materials in percentage by mass as follows: 5%-15% of bamboo fibers, 5%-8% of mulberry silk, 15%-20% of wool fibers, 50%-70% of cotton fibers and 3%-7% of viscose fibers. According to the scheme, the fabric has the advantages of good heat retaining property, soft handfeel and excellent breathability and wet permeability.

An absorber, a liquid impervious sheet covering a back surface side of the absorber and having air permeability, and a cover nonwoven fabric covering a back surface side of the liquid impervious sheet are provided. The cover nonwoven fabric has a large number of holes penetrating the front surface and back surface at intervals in a region overlapping with the liquid impervious sheet. Edge portions of the holes bend-up toward a front surface side. In a region having the holes in the cover nonwoven fabric, rows of the holes, which are aligned in the front-back direction at intervals in the front-back direction narrower than the dimension in the front-back direction of each of the holes, are repeatedly formed at predetermined intervals in the width direction, and the interval of the adjacent two holes in the width direction is wider than the dimension in the front back-direction of the hole.

A textile air permeability detector is disclosed in the invention, and comprises a mounting base, a processing table is fixedly connected to the middle position of the top of the mounting base, a ventilation groove hole is formed in the middle position of the processing table, and a sealing groove is formed in the position, opposite to the outer edge of the ventilation groove hole, of the upper surface of the processing table; and a limiting shell is fixedly connected to the position, opposite to the upper portion of the machining table, of the top of the mounting base, a hydraulic cylinder is fixedly mounted at the top of the limiting shell, the bottom of the hydraulic cylinder extends to an inner cavity of the limiting shell, and a sealing cover is fixedly mounted at the bottom of the hydraulic cylinder. A first straight rack drives a first gear to deflect anticlockwise when moving upwards, then a pointer is driven to deflect on the outer wall of a dial, and due to the fact that the sealing cover and the limiting shell are both made of a transparent structural material, the value of air pressure entering the inner cavity of the sealing cover can be directly read by directly observing the deflection angle of the pointer on the outer wall of the dial, so the air permeability of the cloth is indirectly obtained.