43results about How to "Uniform air permeability" patented technology

Disclosed are: a composite film substrate comprising a dry thermoplastic long-fiber nonwoven fabric which has a high uniformity, thereby making it possible to form porous films free from defects such as strike-throughs or pinholes in the course of film formation, which does not generate skin layer defects during the formation of the film layer, and which has a high mechanical strength and a high dimensional stability at high temperatures; and a high-performance composite film and a high-performance composite film element using the same. The composite film substrate, which comprises a layered, dry, thermoplastic, long-fiber nonwoven fabric consisting of three or more layers including at least a melt-blown fiber layer as an intermediate layer and spun-bonded fiber layers on both sides of said intermediate layer, is characterized in that: the average air-flow resistance thereof is 2.0 to 30.0 kPas / m; and a ratio of the average air-flow resistance and the standard deviation is 0.6 or less.

The invention discloses an after-treatment processing method and equipment of flat electronic grade glass fiber cloth. The method comprises the following steps: firstly, soaking and rinsing unwashed electronic grade glass fiber cloth with hot water to enable surface sizing agents to swell until the sizing agents are washed out of the surface of the electronic grade glass fiber cloth; then carrying out spunlacing and splitting treatment on the soaked and rinsed electronic grade glass fiber cloth. According to the after-treatment processing method and equipment of flat electronic grade glass fiber cloth, cloth cover yarns of the treated glass fiber cloth are minimally destroyed, the finally obtained electronic grade glass fiber cloth is thin in thickness, and low and uniform in air permeability, the flatness of the finally obtained electronic grade glass fiber cloth is better than the electronic grade glass fiber cloth treated by a common after-treatment technology.

Provided are an electromagnetic wave absorbing sheet which is a thin film and a low cost and has an excellent electromagnetic wave absorbing rate, a method of manufacturing the same, and an electronic device using the same. The electromagnetic wave absorbing sheet includes: at least one layer thin-film magnetic sheet which is separated into a plurality of fine pieces; a protective film that is adhered on one surface of the thin-film magnetic sheet; and a double-sided tape that is adhered on the other surface of the thin-film magnetic sheet.

The invention discloses a swinging hopper which can segmented adjust the height of sluiceway, reduce edge effect, improve sinter quality and sinter efficiency, with simple structure, small volume, and low cost, for laying bottom material in sinter machine. The invention comprises a body, a rotary sluiceway, and a sluiceway adjuster, wherein the rotary sluiceway is mounted at the middle of the body, the sluiceway adjuster is mounted at the front of the body, and the height of the sluiceway is reduced from middle to two sides.

The purpose of the invention of the present application is to provide a composite membrane support formed by dry thermoplastic long fiber non-woven fabric, and a high-performance composite membrane and composite membrane element using it. The composite membrane support has the ability to be formed on Extremely high uniformity of the porous layer without defects such as offset and pinholes during film formation, no defects in the skin layer when forming the skin layer, and excellent mechanical strength and dimensional stability at high temperatures. The composite film support of the invention of the present application is characterized in that it is a laminated dry thermoplastic long fiber of more than three layers comprising at least a melt-blown fiber layer in the middle layer and a spunbond fiber layer on both sides of the middle layer. For non-woven fabrics, the average value of the air resistance is 2.0 to 30.0 kPa·s / m, and the ratio of the average value to the standard deviation of the air resistance is 0.6 or less.

The invention discloses a water-based terrace phase-change epoxy putty coating and a preparation method thereof. The water-based terrace phase-change epoxy putty coating is formed by compounding a component A, a component B and a component C; the component A comprises, by weight, 30-50 parts of a waterborne epoxy curing agent, 30-40 parts of deionized water, 0.1-0.3 part of a defoaming agent, 0.1-0.4 part of a dispersing agent, 0.2-0.6 part of a base material wetting agent, 0.8-1.2 parts of a leveling agent and 10-20 parts of a microcapsule phase change material; the component B comprises, byweight, 85-95 parts of waterborne epoxy resin and 5-15 parts of aliphatic glycidyl ether, and the aliphatic glycidyl ether meets the following requirements: (1) the viscosity at 40 DEG C is 3-7 mpa.s,and (2) the epoxy equivalent is 290-310 g / eq; and the component C comprises, by weight, 80-100 parts of 200-mesh quartz powder and 1.5-4.5 parts of a composite fiber. The addition of the microcapsulephase-change material and the composite fiber greatly improves the cracking resistance and adhesive force of the putty coating.

The invention discloses a hot air reshaping and aroma extracting machine, relating to tea processing machinery. The machine is characterized in that a hot air cavity is arranged on a rack, and a plurality of vent holes are arranged at the top of the hot air cavity and connect the a hot air valve and a hot air stove; therefore, the tea is placed at the top of the hot air cavity and is quickly shaped by the hot air erupted from the vent holes, and heating and ventilating are uniform, thus ensuring the shaped tea to shape up identically. The temperature of the tea can be conveniently controlled by controlling the temperature of the hot air, thus being favorable to ensuring the quality of the tea. As seldom stir-frying is required, the broken tea is reduced. The hot air from the vent hole is favorable to taking away the green smell of the tea, thus enabling the tea to be fragrant but not green and improving the grade of the tea. The machine has low requirements on the technologies of the production personnel and features fast tea shaping, identical shaping, little broken tea, good aroma extracting effect and high production efficiency.

A method for forming a patterned noble metal coating on a gas diffusion medium substantially free of ionomeric components comprising subjecting an electrically conductive web with a patterned mask overlaid thereto to a first ion beam having an energy not higher than 500 eV, and to a second beam having an energy of at least 500 eV, containing the ions of at least one noble metal and a gas diffusion electrode.

A fabric, in particular for a paper making machine, includes a plurality of helically wound coil members arranged side by side with respect to each other in an intermeshing manner, such that connecting channels are formed by adjacent intermeshing coil members, a hinge member being introduced into and extending along each connecting channel for interconnecting adjacent coil members, a stuffer channel being formed within each coil member extending along and between two connecting channels associated to a respective coil member, at least a part of the stuffer channels being filled with stuffer members extending longitudinally within the stuffer channels, a stuffer material being provided at least in regions of the fabric for filling spaces formed within the fabric between the coil members, the hinge members and the stuffer members.

The invention provides polylactic acid forming paper adopting polylatic acid fibers as a raw material and a preparation method thereof so as to solve the vices of hair slip and powder drop of the conventional forming paper and reduce excessive consumption of production of the conventional forming paper on resources to a certain extent. The invention adopts the following technical means: the polylactic acid forming paper comprises the following components in parts by weight: 15-65 parts of polylactic acid fibers, 15-20 parts of hardwood fibers with whiteness of 80-85% and 10-15 parts of polyester fibers, wherein the polylactic fibers are 4-6 mm long, and the fineness is 1-5 D; the polyester fibers are 4-10 mm long and the fineness is 0.5-1.4 D; the ratio of the forming paper is 10-50 g and the air permeability is 500-50000 um / pa.s.

The invention discloses an anti-drilling velvet gray fabric, which comprises interwoven warp yarns and weft yarns, the warp yarns include cationic dyeable modified polyester staple fibers and cotton fibers dyed with reactive dyes, and the weft yarns include cationic dyeable modified polyester fibers. permanent polyester filaments and polyester filaments dyed with disperse dyes; the warp and weft are treated with cationic windproof softener for anti-drilling finishing. The present invention introduces anion dye bases into the cationic modified fiber molecular structure chain, and through the adsorption of anions and cations, the cationic windproof softener is evenly distributed on the surface of the fabric, and the air permeability of the finished product is uniform, the anti-drilling performance is stable, and the hand feels soft; the fabric is matched with cations Modified fiber can not only produce gray effect, but also ensure the appropriate reduction of warp and weft yarn density of the fabric under the same anti-drilling performance, and the utilization of cationic windproof softener is high, thereby reducing the cost of fabric, and can be widely used in actual production .

The invention relates to cigarette paper conveying equipment capable of conveying double-layered cigarette paper. The equipment comprises two paper retreating machines, namely a left paper retreating machine (1) bearing internal layer cigarette paper bobbin, and a right paper retreating machine (2) bearing external layer cigarette paper bobbin; the left and right paper retreating machines are respectively controlled by a left paper retreating machine control device (1) and a right paper retreating paper control device (8); the equipment further comprises a double-layered cigarette paper neck (3) arranged on the downstreams of the left paper retreating machine (1) and the right paper retreating machine (2); the double-layered cigarette neck is formed by an internal layer cigarette paper neck (11) and an external layer cigarette paper neck (12) and a horizontal position adjusting rotary button (13); and the cigarette paper conveying equipment also comprises a rotating shaft, namely a plurality of conveying path devices arranged along internal layer cigarette paper (9) and external cigarette paper (10). Simple combination between internal and external cigarette paper is smartly utilized in the cigarette paper conveying equipment, so cigarette with double-layered cigarette paper and without bonding parts between the double layers is provided; and cigarette smoking quality can be enhanced.

The present invention relates to a method for producing a resin for a polyolefin gas permeable membrane. Specifically, the present invention discloses a method for manufacturing a resin for a polyolefin breathable film, wherein the resin contains 5% of low density polyethylene, 8-10% of linear low-density polyethylene, and 23-30% of metallocene linear Low-density polyethylene, 30-40% calcium carbonate and other components; first knead calcium carbonate and antioxidants, mix with other components, and then carry out banburying, rolling, pulverization, extrusion, and granulation in turn, so as to obtain the obtained product. The described resin particles for the polyolefin breathable film. The resin prepared by this method has excellent flow properties and can be used for manufacturing disposable heating sheets.

The invention discloses a tape casting machine, and a method for producing ventilating waterproofing membrane using the same. The tape casting machine comprises a feeding device, a screw-screw cylinder extrusion device, a heating device, a driving device for the screw, a die head, a melt pressure control device, a melt density control device, and a membrane-lip gap control device, wherein the melt pressure control device controls the heating device and the driving device according to the detected melt pressure signals to maintain the melt pressure stable; the melt density control device controls the feeding device according to the detected melt density signals to maintain the melt density stable; and the membrane-lip gap control device controls a membrane-lip gap regulating device according to the detected membrane-lip gap signals to maintain the membrane-lip gap stable. Combining the stable melt pressure, melt density and membrane-lip gap, thin membrane with even thickness extruded by the tape casting machine is ensured.

A fabric, in particular for a paper making machine, includes a plurality of helically wound coil members arranged side by side with respect to each other in an intermeshing manner, such that connecting channels are formed by adjacent intermeshing coil members, a hinge member being introduced into and extending along each connecting channel for interconnecting adjacent coil members, a stuffer channel being formed within each coil member extending along and between two connecting channels associated to a respective coil member, at least a part of the stuffer channels being filled with stuffer members extending longitudinally within the stuffer channels, a stuffer material being provided at least in regions of the fabric for filling spaces formed within the fabric between the coil members, the hinge members and the stuffer members.

The invention discloses a swinging hopper which can segmented adjust the height of sluiceway, reduce edge effect, improve sinter quality and sinter efficiency, with simple structure, small volume, and low cost, for laying bottom material in sinter machine. The invention comprises a body, a rotary sluiceway, and a sluiceway adjuster, wherein the rotary sluiceway is mounted at the middle of the body, the sluiceway adjuster is mounted at the front of the body, and the height of the sluiceway is reduced from middle to two sides.

The invention discloses a preparation method of a PBO composite ultra-high temperature filter material, which comprises the following steps that: a plain blanket is formed through an acupuncture and spunlaced composite process, and then soaked in chemical solvent to prepare the ultra-high temperature filter material, the dust facing surface in the prepared filter material comprises PBO and basaltfibers which are blended, wherein the weight proportion of the PBO fibers is 10 to 15 percent; base cloth comprises PBO long filaments and basalt filaments which are interwoven; and a bottom layer adopts 100 percent basalt fibers. The preparation method of the PBO composite ultra-high temperature filter material effectively reduces the damage of the fibers, improves the strong force of the filtermaterial, meets the need of ultra high temperature flue gas treatment, and is applicable to a bag-type dust collector for ultra high temperature flue gas treatment at above 500DEG C.

The invention provides a fermentation process of Pu'er raw materials, and solves the problems that in the prior art, the final fermentation degrees are different and the tea flavor is influenced due to uneven temperature and different air permeability during fermentation of the Pu'er raw materials. The process comprises the following steps: separating picked Pu'er raw materials in the current year according to bud tips and bud leaves, and respectively cleaning; respectively spreading the cleaned bud tips and bud leaves for water loss; respectively carrying out fixation on the bud tips and the bud leaves; performing fragrance extraction treatment on the bud tips and the bud leaves after fixation; respectively putting the bud tips and the bud leaves subjected to fragrance extraction into a rolling machine for cold rolling, and firstly slightly pressing and then gradually increasing heavy pressing; placing a plurality of silk gauzes in a sealable fermentation room after disinfection and sterilization, then respectively placing the bud tips and the bud leaves on the silk gauzes for pile fermentation, then laying a layer of silk gauzes on the pile fermentation, and sprinkling water for fermentation; and performing low-temperature vacuum drying on the fermented tea leaves to finally obtain a finished product. The fermentation method is uniform in pile fermentation air permeability, can maintain the temperature of tea quality to the maximum extent, improves the taste, and is worthy of popularization.

The purpose of the present invention is to provide a high-density fabric with uniform quality in the width direction and a manufacturing method thereof. The high-density fabric of the present invention is characterized in that the warp and weft yarns are composed of synthetic fiber multifilament yarns with a denier of 210 to 750 dtex, and the cloth In the plain weave fabric having a cover factor in the range of 2000 to 2500, the warp direction expansion rate of the fabric end is 0 to 1.5.