117results about "Open work fabrics" patented technology

A fabric with a three-layer mesh bottom layer through hole structure comprises a surface layer which is a single-layer solid layer formed by interweaving transparent yarns with different elasticity, a middle layer which is formed by interweaving one or more than one shuttle of monofilaments up and down and is used for connecting the surface layer above the middle layer, and a bottom layer located below the middle layer, the bottom layer is a single-layer solid layer formed by interweaving different polyester yarns and monofilaments, the porous structure is located on the upper middle portion of the bottom layer, the porous structure is a warp weave structure formed by interweaving dyed yarns and transparent yarns in a staggered mode, the material is expanded to form any hole shapes, the air permeability is improved while the layers are rich, and the service life of the material is prolonged. The porous structure that the surface layer can see through the bottom layer is achieved through the layered structure, and the air permeability of the vamp can be further improved through the porous structure of the bottom layer.

A net including a plurality of transverse bands, intersecting a plurality of longitudinal bands, the plurality of longitudinal bands each comprising two intermittently adhered films forming channels at discontinuities of adhesion between the films, and wherein at least one intersection of the longitudinal and transverse bands at least one transverse band is threaded through at least one of the channels of at least one longitudinal band.

The invention discloses a manufacturing method of a screen printing plate, which comprises the following steps: mutually interweaving a plurality of parallel warps and a plurality of parallel wefts to form screen cloth, and rolling and pressing the screen cloth to enable the warps and the wefts to be mutually clamped to form screen knots; etching the net knots; stretching and fixing the screen cloth on a screen frame to form a semi-finished product printing screen; coating an emulsion on the screen cloth of the semi-finished screen printing plate to form an emulsion layer, setting a preset yarn removing pattern area, and performing exposure and development on the screen cloth in the preset yarn removing pattern area; removing the warps or the wefts in the preset yarn removing pattern area through etching; removing the emulsion layer; coating a high polymer material on the screen cloth; at least one opening pattern is formed in the area, corresponding to the preset yarn removing pattern area, of the high polymer material layer, and the finished product printing screen plate is formed. According to the invention, the resistance to ink is reduced, the precision of printed patterns is improved, the fluctuation is low, and the device can adapt to opening patterns of various shapes.

The present invention relates to a non-woven composite fabric comprising at least one layer A and at least one layer B wherein at least one surface layer of the non-woven composite fabric is formed by layer A wherein layer A is a non-woven fabric and layer B is a non-woven fabric. And wherein a) layer A comprises first fibers, preferably first filaments, the first fibers being first melt-spun composite fibers, preferably first melt-spun composite filaments, the first melt-spun composite fibers being split to at least a certain extent to produce first base fibers, preferably first base filaments, the first base fibers having an average denier of at most 0.2 dtex, the first base fibers having an average denier of at most 0.2 dtex, and the second base fibers having an average denier of at most 0.2 dtex; wherein the content of the first fiber is from 10 wt.% to 35 wt.%, based on the total weight of the nonwoven fabric; b) Layer B comprises b1) second fibers, preferably second filaments, having an average denier of 0.25 to 10 dtex, preferably 0.25 to 3.5 dtex wherein the content of the second fibers is 65 to 90 wt.%, based on the total weight of the nonwoven fabric, or b2) a woven mesh comprising yarns having an average denier of 500 to 2200 dtex, preferably 800 to 2200 dtex wherein the content of the second fibers, based on the total weight of the nonwoven fabric, is 65 to 90 wt.%, based on the total weight of the nonwoven fabric. The present invention relates to a non-woven fabric comprising (b1) a first fiber, preferably a first filament, having an average denier of 0.25 dtex to 10 dtex, and a woven mesh comprising a yarn having an average denier of 500 dtex to 2200 dtex wherein the combined content of the second fiber and the yarn is 65 wt.% to 90 wt.%, based on the total weight of the non-woven fabric, or (b3) a second fiber, preferably a second filament, having an average denier of 0.25 dtex to 10 dtex, and a woven mesh comprising a yarn having an average denier of 500 dtex to 2200 dtex, based on the total weight of the non-woven fabric.

The utility model discloses a comfortable polyester fabric, which relates to the technical field of fabrics, and adopts the technical scheme that the comfortable polyester fabric comprises a base layer, the base layer is divided into a plurality of moisture absorption areas and a plurality of breathable areas, the moisture absorption areas and the breathable areas are alternately arranged, each moisture absorption area consists of a plurality of moisture absorption grooves, and each breathable area consists of a plurality of breathable holes. A plurality of reinforcing strips are arranged between the breathable area and the moisture absorption area, the reinforcing strips are of a net structure on the base layer, and the area of the moisture absorption area is consistent with that of the breathable area. The natural bamboo fibers and the polyamide fibers are arranged in the comfortable polyester fabric, so that the comfortable polyester fabric has good air permeability, good structural strength and good wear resistance by utilizing the air permeability and wear resistance effects of materials.

The invention relates to the technical field of sunshade net structures, in particular to a sunshade net capable of automatically adjusting light transmittance, which comprises a sunshade net body, and the sunshade net body is in two forms of weaving thermoplastic shape memory lines or integrally forming a net; the sunshade net body is made of a temperature-sensitive composite material, the temperature-sensitive composite material has a shape memory effect and a thermochromic effect, and the temperature-sensitive composite material comprises a composite body of a thermoplastic shape memory polymer and a thermochromic material; by utilizing the characteristics of the thermoplastic shape memory polymer and the thermochromic material composite material, the sunshade net can automatically adjust the light transmittance at lt according to the environment temperature change; at the normal temperature or low temperature of 25 DEG C, the meshes are in an initial fixed state, the sunshade net body is colorless, and the light transmission is high, so that lighting and temperature rising are promoted; at high temperature gt; when the temperature is 25 DEG C, the meshes become smaller, the color of the sunshade net body becomes darker, and light transmission is reduced so as to lower the temperature.

The present application relates to a honeycomb fabric sound-absorbing material containing fiber bundle-mass units and a preparation method thereof.The preparation method comprises the following steps: weaving hollow polyester yarns on a weaving device to obtain a hollow polyester honeycomb fabric, and then vertically implanting fiber bundles on the honeycomb protruding parts of the fabric surface by using an electrostatic flocking device to obtain a honeycomb fabric containing fiber bundles; and then attaching a film / mass to the top end of the fiber bundle to obtain a honeycomb fabric sound-absorbing material containing fiber bundle-mass units.The fabric sound-absorbing material is soft, has a wide sound-absorbing frequency band, and has high noise reduction efficiency.The preparation method is simple, has good economic benefits, and is suitable for industrial production.

Disclosed is a multi-nested twisting loom, a method, a fabric weave, and an upper. The multi-nested twisting loom includes several nested twisting heald sets. The nested twisting heald sets are sequentially arranged along a weft direction on the loom. Each nested twisting heald set includes a second-level twisting heald at a front end of a warp advancing direction and a first-level twisting heald at a rear end. The second-level twisting heald is composed of a single twisting heald. The first-level twisting heald is composed of m twisting healds, where m is greater than 1. The leno weave in the present disclosure is composed of different levels of twisted areas, which increases the variety of leno weaves. Breathable holes with different sizes are formed between different levels of twisted areas, which better fit various parts of the human body and meet the different breathable needs of different

The application provides a production process of a seat mesh cloth, comprising the following steps: S1, plastic particles are coated on the outer surface of polyester to form a thread after being hot melted by a drawing machine, and the thread is cooled by a cooling device and then enters a winding device, and the thread is wound into a small roll of raw material by the winding device; S2, the small roll of raw material is wound into a large roll of raw material by using a warping machine; S3, the thread of the large roll of raw material is woven into a mesh fabric by using a loom; S4, the product is heated and shaped into a finished product by using a shaper, and the product is stacked and stored; S5, the stacked product surface defects are inspected and the defect positions are marked by using a cloth inspecting machine; and the cloth inspecting machine in step S5 can ensure the safety of the hands of workers and automatically wind the cloth end to the surface of a winding roller.

The application discloses a double-layer twisted hole fabric, a preparation method thereof and a vamp, and relates to the technical field of the twisted harness fabric. The double-layer twisted hole fabric comprises a fabric body, the fabric body is divided into a surface layer and a bottom layer, any local area of the surface layer and the bottom layer is provided with a separated twisted hole layer, the two twisted hole layers form a double-layer structure, a plurality of twisted holes are arranged on the twisted hole layer, a hollow transparent hole structure is formed on the twisted hole layer through a hollow gauze organization, the structures of the two twisted hole layers are the same or different, and the twisted holes are displayed on one side of the surface layer or the bottom layer through the hollow transparent hole structure and are superimposed on the other layer. In the application, the texture of the same or different twisted hole shapes on two sides is realized through the gauze organization process of the twisted brown of the partial warp yarn and the surface layer weft yarn and the partial warp yarn and the bottom layer weft yarn, and the structure style formed by the superposition of the two twisted hole layers can be seen from any side of the surface layer and the bottom layer.

This utility model discloses a linen-like fabric, relating to the field of fabric technology. The key technical points are: it includes a base layer, with several staggered protrusions (first and second) fixedly connected to both sides of the base layer; several square-shaped ventilation grooves are formed on the base layer, with the ventilation grooves and protrusions (second) positioned relative to each other and their diagonals running along the length of the protrusions (second); ventilation holes are provided around each ventilation groove; a contact strip covering the protrusions (first) is fixedly connected to the side of the base layer away from the protrusions (second); the contact strip is lifted by the protrusions (first) to form a ventilation channel with the base layer; the weave density of the contact strip is less than that of the base layer; and linen fibers are incorporated into this utility model, which have excellent moisture absorption and dissipation properties, increasing the fabric's absorption rate of sweat and accelerating the evaporation of moisture from the fabric.

The utility model relates to the technical field of surface fabrics, in particular to a light-transmitting surface fabric of an internal atmosphere lamp. The basic fabric material comprises an upper basic fabric layer, a bottom basic fabric layer and a transparent layer arranged between the upper basic fabric layer and the bottom basic fabric layer, connecting grooves are formed in the top ends of the upper basic fabric layer and the transparent layer towards the middle portions, light bar assemblies are fixed in the connecting grooves, and each light bar assembly comprises a bottom bar, an installation bar and a light bar body arranged in the bottom bar. The soft touch and rich decoration of a traditional fabric are perfectly combined with the light-transmitting function of the atmosphere lamp, the requirements of people for comfortable touch and attractive decoration can be met, a unique atmosphere can be created through light transmission, the overall quality of the space is improved, and the decoration effect of the atmosphere lamp is improved. The quality and the performance of the fabric are ensured by the advanced weaving and post-treatment processes, and meanwhile, the manufacturing cost is reduced; wide application scenes cover the automobile interior trim, and the automobile interior trim has good market popularization value and application prospect.

The application provides a double-sided gradual change texture fabric and a preparation method and application thereof, relates to the technical field of fabrics, and forms a double-sided gradual change texture structure through an integrated interweaving process of a three-dimensional blended base material; the three-dimensional blended base material is blended by flax fibers, low-melting-point degradable modified regenerated polyester fibers and nanometer bamboo charcoal micro-fiber according to a mass percentage ratio of 40-45% of flax fibers, 35-40% of modified regenerated polyester fibers and 15-25% of nanometer bamboo charcoal micro-fiber; the double-sided gradual change texture structure comprises three regions that are integrally formed and smoothly transitioned along the thickness direction of the fabric, including a front side fine nap concave-convex region, a back side ridge and groove temperature locking region and an intermediate gradual change interweaving region, and is connected and interposed between the front side fine nap concave-convex region and the back side ridge and groove temperature locking region, and the texture characteristics of the irregular honeycomb-shaped protrusions and the ridge and groove-shaped grooves are gradually converted and fused. The application has the advantages of skin-friendly dryness, high wear resistance, self-cleaning, degradability and ecological printing and dyeing characteristics and the like.

The embodiment of the invention discloses a fabric and a manufacturing method thereof. Wherein the fabric comprises warp yarns and weft yarns, and the warp yarns and the weft yarns are mutually and vertically interwoven; the warp yarns comprise monofilaments, the weft yarns comprise dyed yarns and monofilaments, the monofilaments form a compact texture, the dyed yarns adjacent to the monofilaments form a loose texture, and the compact texture extrudes the adjacent loose texture to form a breathable window. According to the embodiment of the invention, the close tissues with high transparency extrude the adjacent colored loose tissues, the breathable window is actively supported on the surface of the fabric, the edge of the window is partially semitransparent, the breathable window with moderate size can be obtained without shearing, and the edge of the window is dense monofilaments, is higher in strength and is not easy to loosen.

The utility model discloses a wear-resistant polyester elastic fabric, and relates to the technical field of polyester fabrics. According to the technical scheme, the wear-resistant floor is characterized by comprising a base layer, a plurality of protrusions are fixedly connected to the base layer, grooves are formed in the protrusions, vent grooves penetrating through the thickness direction of the base layer are formed in the two sides, in the width direction of the protrusions, of the base layer, and a plurality of wear-resistant strips are fixedly connected to the side, where the protrusions are formed, of the base layer; the relative positions of the wear-resisting strips and the protrusions are the same, the wear-resisting strips and the protrusions are arranged perpendicular to the length direction of the protrusions, ventilation channels are formed between the two sides of the width direction of the protrusions and the wear-resisting strips, the wear-resisting strips made of polyamide fibers are arranged on the fabric, the polyamide fibers have good wear-resisting performance, and the wear-resisting effect of the fabric is improved.

Provided is a filter having a high classification characteristic and a method for manufacturing the filter. This filter comprises a mesh-like sieve part 10 which is woven using a wire material 20A formed of a predetermined resin so that wire materials 20A, 20B three-dimensionally cross from at least two mutually different directions (X, Y), the filter classifying desired granular or powder-like objects to be sieved from an opening section 10A of the sieve part 10, wherein the wire materials 20A, 20B have recesses and protrusions formed, through a sandblast treatment using a predetermined water-soluble blast material, by processing an upper surface U of the opening section 10A through which the object to be sieved pass, and side surfaces S3, S4 that form a gap between the upper surface U and a lower surface D.

This invention discloses a highly breathable and abrasion-resistant functional textile fabric. The fabric has a three-layer composite structure, consisting of a surface abrasion-resistant layer, a core breathable layer, and a bottom support layer, from the outside to the inside. A method for preparing this highly breathable and abrasion-resistant functional textile fabric includes the following steps: raw material pretreatment, weaving of each layer, functional finishing of each layer, finishing of the core breathable layer, composite molding, and post-finishing. The textile fabric of this invention employs a three-layer composite structure. The surface abrasion-resistant layer is a blend of modified polyester and aramid fibers, coated with an abrasion-resistant finishing agent to significantly improve abrasion resistance. The core breathable layer uses a diamond-shaped mesh structure, treated with breathability modification to maximize breathability. The bottom support layer is a blend of cotton and bamboo fibers, treated with a soft and breathable finish to improve comfort and breathability. The three layers are connected by a dotted composite method to ensure unobstructed airflow channels, achieving a synergistic improvement in both high breathability and high abrasion resistance.

Disclosed is a breathable composite membrane, corresponding manufacturing method, and resulting parts, comprising a support woven fabric fabric made from woven polymer monofilaments and a membrane attached to the support fabric, the support woven fabric being at least partially embedded in the membrane, the membrane being a polymer membrane having a solidified porous microstructure.

The utility model provides a fabric and clothing, the fabric comprises warp yarns and weft yarns, and the warp yarns and the weft yarns are woven into a tatting structure; wherein at least one of the warp yarns and the weft yarns comprises first yarns and second yarns, the first yarns are covering yarns taking spandex yarns as yarn cores, and the second yarns are spandex yarns; the at least two second yarns are adjacent, and the two adjacent second yarns are arranged at intervals to form a hollow area. According to the technical scheme, the interweaving structure of the tatting technology is compact, and the fabric can be made to be lighter and thinner while the strength of the fabric is kept; the spandex is adopted as the yarn core of the first yarn and the second yarn, so that the fabric has better elasticity; and two adjacent second yarns are arranged at intervals to form a hollow area, and the air permeability of the fabric can be improved by the interval between the second yarns in the hollow area, so that the fabric is light, thin, high in elasticity and air-permeable.

The application discloses a kind of layering fabrics of twist hole pattern and preparation method thereof, vamp, it is related to the technical field of layering fabrics of twist heald fabric.The layering fabric of twist hole pattern includes fabric body, fabric body is divided into face layer, bottom layer, is provided with the layering twist hole layer with bottom layer in any local position of face layer side, several twist holes are provided on twist hole layer, hollow openwork structure is formed on twist hole layer by openwork gauze organization, and the structure of bottom layer of same size, shape can be seen from face layer side by hollow openwork structure.The layering fabric of twist hole pattern in the application, it includes twist hole layer, twist hole layer is specifically composed of at least two yarn layers, face layer realizes twist hole texture by twisting brown process, and bottom layer is woven into complex plain weave texture, and the texture of bottom layer pattern can be seen through face layer twist hole, and level is rich.The preparation method of the layering fabric of twist hole pattern in the application is convenient for the efficient setting of layering fabric of twist hole pattern, while guaranteeing the flatness of layering fabric of twist hole pattern structure.

The invention discloses an antibacterial curtain and a production process, belongs to the technical field of curtains, and solves the problems that the current curtain cloth is too thick and heavy, a good ventilation effect cannot be achieved even if a window is opened when the window is shielded by the curtain for a long time, and the curtain is easily damaged at a top hanging part when being in contact with the external environment for a long time, so that the service life of the curtain is prolonged. And finally, the overall service life is shortened. Comprising an air-permeable shading layer, the air-permeable shading layer comprises air-permeable sections and shading sections which are alternately arranged, and a shading piece right facing the air-permeable sections is fixedly connected between every two adjacent shading sections. The shading parts right facing the breathable sections are fixedly connected between every two adjacent shading sections in a yarn sewing mode, stable shading of light penetrating through the breathable sections can be achieved through the arranged shading parts, then the overall shading performance of the structure can be further enhanced, the breathable gaps are formed between the shading parts and the shading sections in a surrounding mode, and the shading performance of the structure is improved. The flowing air may flow across the shade by means of the formed ventilation gap.

A bone implant (10) for enclosing bone material (12) is provided. The bone implant comprises a mesh (14) having one or more pores, an inner surface (16) and an outer surface (18) opposing the inner surface, the inner surface configured to receive a bone material when the inner surface of the mesh is in an open configuration; and a plurality of projections (124) disposed on or in at least a portion of the inner surface of the mesh, the outer surface of the mesh or both the inner surface and outer surface of the mesh. Each of the plurality of projections have a first end (126) and a second end (128) opposite the first end, the first end contacting the inner surface of the mesh, the outer surface of the mesh or both the inner surface and outer surface of the mesh, the first end having a first surface area larger than a second surface area of the second end and larger than a surface area of the one or more pores of the mesh, the second end extending from at least the portion of the inner surface, the outer surface of the mesh or both the inner surface and outer surface of the mesh and configured to engage a section of the inner surface of the mesh or a section of the outer surface of the mesh or both sections of the inner and outer surfaces of the mesh in a closed configuration so as to enclose the bone material.

The utility model provides a moisture absorption and sweat releasing composite fabric. The moisture absorption and sweat releasing composite fabric comprises a moisture absorption layer and a breathable layer, the moisture absorption layer is located on the inner side of the composite fabric, the side, close to the human skin, of the moisture absorption layer is a skin attaching face, and a plurality of first moisture permeable channels extending in the vertical direction are evenly distributed on the skin attaching face. The moisture absorption layer is formed by weaving hollow yarn, and a second moisture permeable channel is formed in the center of the hollow yarn and is of a cavity structure formed by the center of the hollow yarn; a breathable layer is connected to the side, away from the skin attaching face, of the moisture absorption layer through a connecting tissue structure, the breathable layer is located on the outer side of the composite fabric, and breathable mesh holes are evenly distributed in the breathable layer; the first moisture-permeable channel is formed by a groove structure on the skin-attaching surface, and the cross section of the first moisture-permeable channel is inverted-v-shaped; the breathable layer is of a leno weave structure, and the section of each breathable mesh is hexagonal. The utility model has the advantages of efficient moisture absorption and sweat releasing, and can keep the skin dry and comfortable.

The invention relates to the technical field of textile, and discloses a high-density professional anti-mite dustproof pure cotton tribute silk fabric which comprises a surface layer and an inner layer, and the surface layer and the inner layer are integrally formed through a weaving process; the surface layer is formed by weaving 80S pure cotton yarns, the warp-wise density of the surface layer is 235 pieces per inch, the weft-wise density of the surface layer is 200 pieces per inch, and the aperture range of the surface layer is 0.14 mu m-0. 5 mu m; the inner layer is formed by weaving 60S pure cotton yarns, the warp-wise density of the inner layer is 205 pieces per inch, the weft-wise density of the inner layer is 180 pieces per inch, and the aperture range of the inner layer is 0.5-1 [mu] m. Through the innovative design of the double-layer gradient aperture structure, accurate partition and synergistic effect of fabric functions are achieved, the compact structure of the outer layer effectively blocks dust mites and fine particles, and the relative loose structure of the inner layer remarkably improves the breathability and comfort level; the long-standing core contradiction that the protection performance and the breathable comfort of the high-density anti-mite fabric are difficult to consider at the same time is successfully solved.

The utility model discloses a kind of chemical fibre fabrics, it relates to textile fabric technical field, and its technical scheme main point is: the side of inner layer close to outer layer is equipped with several support strips, the side of outer layer close to inner layer is equipped with wet guide grid, and the support of several support strips and wet guide grid is formed in the ventilation cavity between inner layer and outer layer, several air holes one that inner layer is opened with ventilation cavity intercommunication, several air-permeable parts are surrounded in outer layer by wet guide grid, several air holes two that air-permeable part is opened with ventilation cavity intercommunication, and the hygroscopicity of outer layer is greater than the hygroscopicity of inner layer.The utility model passes through ventilation cavity, several air holes one, several air holes two of intercommunication and increases the air flow effect between fabric inside and outside, to improve the moisture dispersion speed of fabric, viscose fibre has the characteristics of more strong hygroscopicity and fast moisture dispersion than terylene fibre, so that the moisture absorbed in inner layer can be transmitted dispersion to viscose fibre in outer layer fast moisture dispersion.

The utility model discloses an antibacterial fabric, which relates to the fabric technology, and is characterized in that the antibacterial fabric comprises an outer layer and an inner layer, the outer layer is provided with raised lines, the outer layer adopts a leno weave formed by weaving structural yarns and moisture dissipation yarns together, and the inner layer adopts a through hole weave formed by weaving antibacterial yarns in a warp and weft manner. The protruding strips can well increase the contact area of the outer layer and air, the loss speed of water on the fabric can be well increased, bacterium breeding is reduced by reducing water residues on the fabric, the inner layer formed by weaving the antibacterial yarn can effectively guarantee the overall antibacterial property of the fabric, and the antibacterial effect of the fabric is improved. The inner layer is provided with a plurality of holes due to the woven through hole texture, part of the side, facing the inner layer, of the outer layer can be in contact with air through the through hole texture, the loss speed of water on the outer layer is further increased, meanwhile, due to the fact that the weaving density of the through hole texture is low, the quality of the inner layer can be well reduced, and the service life of the inner layer is prolonged. Therefore, the overall quality of the fabric is reduced.

To provide a woven fabric holding a see-through feeling and having good air permeability.SOLUTION: The fabric of the present embodiment comprises a weft yarn F2 having a high fineness, and has a section A in which the warp yarn W is not arranged and a plurality of weft yarn F1 are arranged, a section B in which the warp yarn W is not arranged and a plurality of weft yarn F2 are arranged, a section C woven by the warp yarn W and the weft yarn F1, and a section D woven by the warp yarn W and the weft yarn F2. The section A is adjacent to the section B and the section C, and the section D is adjacent to the section B and the section C.SELECTED DRAWING: Figure 1

The present application belongs to the technical field of weaving, in particular to a kind of woven open hole gradual change fabric and processing method thereof, comprising fabric body, the fabric body is provided with weaving organization, the weaving organization includes the first saro organization formed by at least one warp and weft interweaving, the first saro organization includes a plurality of different color weaving areas, and the saro organization is provided with perforation;Two warp threads (ground warp and twisting warp) and a group or two groups of weft are interwoven by using a special heddle machine to form the first saro organization with a strip of transparent gap, or detailed tight or rough three-dimensional, also can be partially made into plain structure, gradually transition from single color block to different color weaving area first saro organization, form weaving organization, form gradual change fabric effect.

To provide a laminated heat-shielding fabric for preventing infrared transmission that offers an excellent balance between concealment and heat shielding, and has few design restrictions. [Solution] A laminated heat-shielding fabric for preventing infrared transmission, comprising an outer layer fabric and an infrared-absorbing inner layer fabric containing a tungsten-based infrared-absorbing pigment, wherein the opening ratio of the inner layer fabric is 12% or less, and the opening ratio of the outer layer is greater than the opening ratio of the inner layer.