297 results about "Fiber density" patented technology

Disclosed is a fiber-optic cable that possesses a high cable filling coefficient (and/or a high cable fiber density) yet ensures that its enclosed optical fibers demonstrate improved attenuation performance when subjected to temperature variations between about −40° C. and 70° C. The fiber-optic cable is suitable for efficient installation into ducts, such as via blowing.

Disclosed is an improved optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses.

The coating system features (i) a softer primary coating with excellent low-temperature characteristics to protect against microbending in any environment and in the toughest physical situations and, optionally, (ii) a colored secondary coating possessing enhanced color strength and vividness. The secondary coating provides improved ribbon characteristics for structures that are robust, yet easily entered (i.e., separated and stripped).

The optical fibers in accordance in the present invention may be incorporated into a reduced-diameter optical-fiber cable that possesses a high fiber count and a high cable fiber density. The high-fiber-density optical-fiber cable, which is suitable for deployments in ducts, is capable of achieving outstanding attenuation performance when subjected to temperature variations of between about −40° C. and 70° C.

Disclosed is a reduced-diameter optical-fiber cable that possesses a high fiber count and a high cable fiber density.

A three-dimensional nonwoven fabric with a pore structure includes raised regions, recessed regions, and the pore structure. Fiber densities from the raised regions to the recessed regions are gradient. That is, the fiber density of the edges transiting from the raised regions to the recessed regions is higher than that of the tops of the raised regions. Pressure resistance performance of the high-density fiber regions keeps the three-dimensional nonwoven fabric significantly uneven, and quickens liquid permeation and reduces residues, and the three-dimensional nonwoven fabric has a high permeating speed and is dry and comfortable.

An absorbent article comprising nonwoven fabric having convex and concave surfaces, and that allows liquid such as excreta and the like to permeate quickly. A sanitary napkin has a plurality of raised ridge portions and groove portions in a top sheet member. The fiber density of the side edge portions of each of the plurality of raised ridge portions in the thickness direction of the nonwoven fabric is substantially uniform, and is higher than the average fiber density in the raised ridge portions. The fiber density of the central portion between both the side edge portions of each of the plurality of raised ridge portions is substantially uniform in the thickness direction of the nonwoven fabric, and is lower than the average fiber density in the raised ridge portions.

Wet-pressed creped tissue sheets exhibit continuous undulating valleys separated by continuous mono-planar macro-ridges running in the machine direction of the sheet, the macro-ridges being of a lower fiber density relative to the fiber density of the undulating valleys. The tissue structure can be created by pressing a densified tissue web against the surface of a Yankee dryer while the web is supported by a texturizing (molding) fabric having a web-supporting surface having highly topographic continuous or substantially continuous ridges and valleys and thereafter creping the web.

The present invention provides a nonwoven fabric of which at least one of fiber orientation, fiber density, and basis weight is adjusted, and in which at least one of a predetermined groove portion, an opening, and a protrusion is formed, a manufacturing method for the nonwoven fabric, and a nonwoven fabric manufacturing apparatus. The nonwoven fabric manufacturing apparatus of the present invention manufactures a nonwoven fabric of which at least one of fiber orientation, fiber density, and basis weight is adjusted, or in which at least one of a predetermined groove portion, an opening, and a protrusion is formed by blowing fluid mainly containing gas onto a fiber web which is formed in a sheet shape, and which is in a state where at least a portion of the fibers constituting the fiber aggregate has a degree of freedom.

A topsheet for absorbent articles having absorbing performance for smoothly transferring liquid body waste, e.g., menstrual blood or urine, to an underlying absorbent member and surface characteristics such that the surface thereof in contact with wearer's skin is soft enough not to cause skin irritation. The topsheet 1 comprises a first layer 11 disposed on the side of a wearer and a second layer 12 disposed on the side of an absorbent member, the first layer and the second layer being partly joined together, and having protrusions and depressions on the side of a wearer, wherein the first and second layers each comprise a fiber aggregate, the first layer has fusion-bonded fiber intersections, the first layer has an apparent thickness (t1) of 0.1 to 5 mm, the second layer has an apparent thickness (t2) of 0.2 to 3 mm, the apparent thickness ratio of the first layer to the second layer (t1/t2) is 0.5 to 8, the first layer has a fiber density (d1) of 0.001 to 0.05 g/cm³, the second layer has a fiber density (d2) of 0.03 to 0.2 g/cm³, and the fiber density (d2) of the second layer is higher than that (d1) of the first layer.

For the purpose of preventing a situation in which the fiber density looks as if it suddenly decreases in a specific view direction, a method comprises: specifying a region of interest R1 in MR image data collected by a diffusion tensor method; defining regular grid points in the region of interest R1; defining points obtained by randomly moving the grid points as tracking start points S1, S2, . . . ; performing diffusion tensor analysis on each tracking start point S1, S2, . . . in the image data to determine a direction of a principal axis vector; tracking a fiber by repeatedly selecting a neighbor point along the direction of the principal axis vector and performing diffusion tensor analysis on the neighbor point to determine the direction of the principal axis vector; and producing and displaying an image of the tracked fibers as viewed in a desired view direction.

A topsheet for use on the skin facing side of an absorbent article. The topsheet includes a first nonwoven fabric layer 1 and a second nonwoven fabric layer 2 laminated and partly joined together by heat fusion bonding, forming fusion bonds 4. The first nonwoven fabric layer 1 forms a large number of projections 5 projecting toward the skin of a wearer in portions other than the fusion bonds 4. The projections 5 are arranged discretely in both a first planar direction (direction X) and a second planar direction perpendicular to the first planar direction (direction Y). The individual projections 5 are filled with staple fiber 3. The staple fiber 3 is substantially absent in the fusion bonds 4. The individual projections 5 of the topsheet have fiber densities in the following relationship: first nonwoven fabric layer 1<the staple fiber 3<the second nonwoven fabric layer 2.