To provide a net-like structure having excellent low resilience characteristics, cushioning properties, and durability. The net-like structure has a three-dimensional random loop bonded structure constituted of a continuous linear body made of a thermoplastic elastomer having a fiber diameter of 0.1-3.0 mm and a styrene content of 10-40 mass %, the net-like structure having an apparent density of 0.005-0.30 g/cm.sup.3 and a 40 C. compression residual strain of less than or equal to 35%.

To provide a net-like structure having excellent low resilience characteristics, cushioning properties, and durability. The net-like structure has a three-dimensional random loop bonded structure constituted of a continuous linear body made of a thermoplastic elastomer having a fiber diameter of 0.1-3.0 mm and a styrene content of 10-40 mass %, the net-like structure having an apparent density of 0.005-0.30 g/cm.sup.3 and a 40 C. compression residual strain of less than or equal to 35%.

A multilayer nonwoven fabric includes: an elastic nonwoven fabric containing a specific low crystalline polypropylene; and a mixed fiber spunbonded nonwoven fabric disposed on at least one surface of the elastic nonwoven fabric, wherein the mixed fiber spunbonded nonwoven fabric contains a long fiber of a thermoplastic elastomer (A) and a long fiber of a thermoplastic elastomer (B) other than the thermoplastic elastomer (A), in a ratio of 10 to 90% by mass:90 to 10% by mass ((A):(B), with the proviso that (A)+(B)=100% by mass).

The disclosure discloses an aerogel-modified polypropylene and a preparation method thereof, and ultralight thermal-insulating melt-blown non-woven fabric containing the aerogel-modified polypropylene and a preparation method thereof. The preparation method for the aerogel-modified polypropylene includes the following steps: before or during a polymerization reaction, adding aerogel to blend with reaction materials with low viscosities. thereby implementing uniform dispersion of the aerogel to prepare the aerogel-modified polypropylene; herein the reaction materials include a propylene monomer, a catalyst, and an additive, and the aerogel has a granularity falling within a range from 20 nm to 100 m, a porosity falling within a range from 40% to 99.9%, a stacking density falling within a range from to 500 g/L, and, a volume fraction being 20-60% of a volume of the ultralight thermal-insulating melt-blown non-woven fabric prepared from the aerogel-modified polypropylene.

The present disclosure relates to a preparation method of a super absorbent polymer non-woven fabric and super absorbent polymer fibers prepared therefrom. According to the preparation method of the present disclosure, it is possible to provide super absorbent polymer fibers exhibiting high flexibility and fast absorption rate in the form of long fibers.

The present disclosure relates to a preparation method of a super absorbent polymer non-woven fabric and super absorbent polymer fibers prepared therefrom. According to the preparation method of the present disclosure, it is possible to provide super absorbent polymer fibers exhibiting high flexibility and fast absorption rate in the form of long fibers.

The invention provides a modified cross-section fiber is provided having a single fiber fineness of 0.01 to 1.0 dtex and modified cross-section degree (, =P/(4A).sup.1/2, where P represents a peripheral length (m) in a fiber cross section, and A represents an area of the fiber cross section (m.sup.2)) of 1.5 to 4.0 at a fiber cross section taken along a direction perpendicular to the fiber axis.

Disclosed herein are nanofiber structures, and methods of making and using the same. In some embodiments, provided is a porous sheet comprising a plurality of nanofibers in contact with a supporting structure comprising a plurality of supporting elements, wherein: the nanofibers have an average diameter of about 10-900 nm; the supporting elements have an average thickness less than, about equal to, or greater than that of the thickness of the nanofibers; the sheet has an average thickness that is about 75%-150% of an average thickness of the supporting elements; a total volume of the nanofibers is less than about 20% of a total volume of the porous sheet; and/or a total volume of the supporting structure is less than about 50% of the total volume of the porous sheet. In some embodiments, provided is a multilayer structure comprising one or more sections, where each section independently comprises one or more porous sheets as described herein.

Disclosed herein are nanofiber structures, and methods of making and using the same. In some embodiments, provided is a porous sheet comprising a plurality of nanofibers in contact with a supporting structure comprising a plurality of supporting elements, wherein: the nanofibers have an average diameter of about 10-900 nm; the supporting elements have an average thickness less than, about equal to, or greater than that of the thickness of the nanofibers; the sheet has an average thickness that is about 75%-150% of an average thickness of the supporting elements; a total volume of the nanofibers is less than about 20% of a total volume of the porous sheet; and/or a total volume of the supporting structure is less than about 50% of the total volume of the porous sheet. In some embodiments, provided is a multilayer structure comprising one or more sections, where each section independently comprises one or more porous sheets as described herein.

A tool measures the cleanliness of the interior of an endoscope channel, wherein the tool is for efficiently, rapidly, and reliably examining whether or not an endoscope is clean after being cleaned and sterilized. The tool for measuring the cleanliness of the interior of an endoscope channel is characterized in that a wiping cloth containing ultrafine fibers is attached to the tip of a filament having a thickness enabling the filament to be inserted into the endoscope channel.