152results about "Monocomponent polypropylene artificial filament" patented technology

A nonwoven fabric comprises a first surface, a second surface, and a visually discernible pattern on at least one of the first and second surfaces. The visually discernible pattern has a regular, repeating pattern of three-dimensional features. Each of the three-dimensional features define a microzone comprising a first region and a second region. The first and second regions having a difference in values for an intensive property. The first surface has a TS7 value in the range of about 1 dB V2 rms to about 15 dB V2 rms. The second surface has a TS7 value in the range of about 1 dB V2 rms to about 15 dB V2 rms. A ratio of the TS7 value of the first surface to the TS7 value of the second surface is in the range of about 1 to about 3.

The invention relates to a method (100) for manufacturing a photocatalytic multi-component fiber including the following steps:Supplying a support mixture (110), including at least one thermoplastic polymer;Supplying an active mixture (120), including:at least one organic polymer,at least one photocatalyst at a concentration of at least 10% by weight relative to the weight of active mixture,at least one coupling agent resistant to oxidation,Spinning (130) a multi-component fiber from support and active mixtures;Eliminating (160) the at least one organic polymer on the surface of the multi-component fiber so as to generate a photocatalytic multi-component fiber.The invention also relates to a multi-component fiber, a textile and a filter.

The present invention related to a method of for the production of textile articles, I which the textile articles can be disassembled automatically or semi-automatically, in which, when sewing or stitching, a polymer melt yarn is used.

The invention relates to the technical field of filtering materials, and discloses a preparation method of a low-leakage-point filtering framework convenient for membrane compositing and a filter element of a filter.According to the method, polypropylene is used as a raw material to prepare the filtering framework through a spunbond method, the filtering framework comprises a supporting layer and a composite layer, and the fiber diameter of the supporting layer is larger than that of the composite layer; the supporting layer is used as a supporting framework to improve the stiffness and strength of the filtering layer, the composite layer is used for being compounded with the polymeric membrane, the fiber diameter of the composite layer is smaller than that of the supporting layer, and the flatness uniformity of the filtering layer compounded with the polymeric membrane is improved; the combination firmness of the filter layer and the filter framework is improved through the gradually-changed filter framework structure, and the leakage points of the filter layer are reduced.

Fluorine-free compositions and methods for producing a non-woven fiber and / or fabric capable of repelling low surface tension fluids. Compositions may include a siloxane-based component, an aluminum-oxide based component, a triglyceride, and a resin. A masterbatch composition when blended as an additive into a base resin may lower the surface tension of a produced fibers which may increase barrier properties of a nonwoven fabric prepared from the fiber. The nonwoven fabric may serve as a barrier material for low surface tension fluids including but not limited to bodily fluids. No fluorine based components may be used or added during production of the masterbatch composition, or during production of the blend, fiber, or fabric using the masterbatch composition.

The resin composition for melt spinning of the present invention is a filament having a melt viscosity of 250 Pa·s or less at 200° C. and a shear rate of 0.1 s−1 and a tensile strength of 10 MPa or more. The filament can be produced by forming a molten liquid of a resin composition having a melt viscosity of 250 Pa·s or less at 200° C. and a shear rate of 0.1 s−1 into a filament shape to provide a formed material, and conveying and concurrently cooling the formed material. The present invention also provides a resin composition for melt spinning being a filament, and a method for producing fiber using a melt spinning apparatus.

A polymer composition including a polypropylene polymer having the following characteristics: exhibiting a melt flow rate of greater than about 900 g / 10 min; a molecular weight distribution (Mw / Mn) of greater than about 4.5 or 6; a Mz+1 / Mw ratio of less than about 8; and a xylene soluble content of less than about 4.0% by weight. Such polymers are useful in meltblown nonwoven applications.

Charged polymeric webs, such as electret webs, include a thermoplastic resin and a charge-enhancing additive. The additives are substituted heterocyclic thiolate salts. The heterocyclic thiolate salt has 2 nitrogen groups and a third group that may be an NH, N—NH2, O, or S group. The substituent group is an aromatic or heterocyclic aromatic group. The electret webs may be a non-woven fibrous web or a film. The electret webs are suitable for use as filter media.

The invention provides a polypropylene resin composition suitable for ultra-low basis weight and high-rigidity non-woven fabrics and polypropylene fibers prepared from the polypropylene resin composition. Wherein optimized melt index, melting point and crystallization temperature and narrow molecular weight distribution are obtained by using a polypropylene resin prepared in the presence of a metallocene compound having a specific structure and a molecular weight modifier within predetermined ranges.

A system and method for providing a plurality of fibers from a spinneret; subjecting the fibers to quench air; attenuating the fibers through a closed stretching unit; reducing a velocity of the plurality of fibers in a diffuser that is spaced apart from an exit of the closed stretching unit in a direction of travel of the fibers, the diffuser having opposed diverging sidewalls; and subjecting the fibers to an applied electrostatic charge before the fibers enter the diffuser, wherein the electrostatic charge is applied by one or more electrostatic charging units. In one aspect, the electrostatic charging units are configured to apply a relatively high current, such as greater than 1 mA.

It is an object of the present invention to provide a nonwoven fabric having mechanical strength which is hardly cut and broken by an external force, and a separator for electrochemical devices using the nonwoven fabric.The inventive nonwoven fabric has a sum of tensile strengths by zero-span per basis weight in the machine direction and the cross-machine direction of 6.5N / 50 mm or more. Thus, the strength of the constituent fibers of this nonwoven fabric against an external force is high, and this nonwoven fabric has mechanical strength which is hardly cut and broken by an external force.The separator for electrochemical devices of the present invention is composed of this nonwoven fabric.

The present disclosure relates to a production method concerning the use in synthetic yarn production of lavender fibres, which possess antimicrobial and antioxidant properties, obtained in powder form from lavender stems that remain as waste in nature.

The present invention relates to filtration media made from melt-blown fibers having improved barrier properties. The melt-blown fibers in the filtration media of the invention are made of a visbroken metallocene-catalyzed propylene homopolymer composition with specified melting temperature Tm and molecular weight distribution (MWD).

An absorbent article is disclosed. The article includes a topsheet formed of a section of formed nonwoven web material having an ordered arrangement of zones, each zone comprising one or more attenuated regions adjacent to one or more built-up regions, wherein the attenuated regions have a first average basis weight and the built-up regions have a second average basis weight, wherein the first average basis weight is less than the second average basis weight, the difference in basis weights corresponding to disposition of the filaments according to the ordered arrangement. The attenuated region(s) may include a plurality of discrete low bulk portions arranged in a pattern disposed along a longitudinal axis of the article, which facilitate z-direction movement of fluid through the topsheet and inhibit spreading of a fluid stain along the topsheet in the x and y directions.

The invention relates to the technical field of concrete, and discloses a preparation method of high-performance recycled concrete, which comprises the following steps: preparing modified hyperbranched polypropylene fibers from an intermediate 1 and an intermediate 2, and stirring the hyperbranched polypropylene fibers with fly ash, slag, cement, silica fume, sand, stone, recycled aggregate, water, a water reducer and steel fibers to obtain the high-performance recycled concrete. And synthesizing the high-performance recycled concrete. In the invention, the modified hyperbranched polypropylene fiber disperses stress through a three-dimensional network structure, the steel fiber provides macroscopic toughness, the hyperbranched polypropylene fiber delays the damage process through bridging cracks, and the steel fiber absorbs energy through pullout work to form a coarse-fine graded toughening system. An imidazoline functional group on the surface of the modified hyperbranched polypropylene fiber and the surface of the steel bar form a passive film, the steel bar is prevented from corroding the recycled aggregate concrete, the performance of the recycled aggregate concrete is close to that of common concrete, and natural aggregate exploitation and carbon emission are reduced by optimizing the utilization rate of the recycled aggregate.

The invention relates to a coarse synthetic fiber consisting of three or more partially fused filaments made of a polymer composition comprising at least one polypropylene, wherein the fiber has a multi-lobed cross-sectional shape with three or more lobes. The invention further relates to a method of producing a coarse synthetic fiber, to a cementitious material comprising a binder and the coarse synthetic fiber of the invention, and to a method of forming a concrete surface using a concrete mixture modified with the coarse synthetic fiber of the invention.

The present invention relates to methods for the treatment of textiles used for facial masks. The textiles treated according to the methods of invention ensure for inactivation of viruses captured by the textile. The method for preparation of virucidal polymer textile materials, comprising the following steps: a) textile material pre-treatment using non-equilibrium gaseous plasma at a pressure below 1000 Pa, wherein the gaseous plasma comprising at least 5 vol% oxygen or water vapor with the fluence of reactive particles, in particular neutral oxygen atoms or OH radicals, between 3×1022 m-2 and 3×1025 m-2, b) treatment of the pre-treated material obtained in step a) with a diluted solution of a virucidal substance, wherein the virucidal substance is a water solution of a virucidal agent with a concentration in the range from 0.05 to 15% (w / w), and c) drying the material treated in step b) at a temperature below 100 °C.

The following properties: a melt flow rate of greater than about 900 g / 10 min; a molecular weight distribution (M w / M n ); Less than about 8 M z+1 / M w and a xylene solubles content of less than about 4.0 wt.%. Such polymers are useful in meltblown nonwoven applications.

The invention discloses high-performance recycled concrete prepared from recycled polypropylene fibers and a preparation method of the high-performance recycled concrete, and belongs to the technical field of building materials. The recycled concrete comprises the following raw materials in parts by weight: 400-550 parts of cement, 600-720 parts of recycled aggregate, 400-450 parts of natural aggregate, 450-500 parts of machine-made sand, 200-250 parts of water, 20-35 parts of recycled polypropylene fiber and 1-2 parts of a water reducing agent. The regenerated polypropylene fibers are prepared by performing multiple modification on the waste woven bags, and the polypropylene fibers have good chimeric property on machine-made sand and good dispersion performance in a concrete matrix, and can significantly improve the compressive strength and splitting tensile strength of concrete.

A meltblown material formed from a plurality of fibers that can withstand the effects of a gamma irradiation sterilization process without negatively impacting the bacterial filtration efficiency (BFE) and particle filtration efficiency (PFE) of the meltblown material (e.g., facemasks, surgical gowns, surgical caps, etc.) is provided. The fibers include a high melt flow rate (MFR) polyolefin. Further, both the fibers include specific antioxidants and a charge enhancer package that allow for the effective electret treatment of the resulting meltblown material prior to sterilization, where the filtration efficiency and of the material is improved post-sterilization compared to materials without the specific combination of antioxidants and charge enhancing components.

The raised yarns are filaments. The filament is a multi-component filament comprising a core (10), at least a first sheath (20) and optionally a second sheath (30), the first sheath (20) at least partially surrounding the core (10), and the second sheath (30) at least partially surrounding the first sheath (20). The core (10) comprises recycled polypropylene, and the first sheath (20) comprises polypropylene and a particulate opaque additive.

The invention relates to the technical field of non-woven fabric processing equipment, in particular to a polypropylene melt-blowing device which comprises a material mixing and stirring assembly and a rectification type rapid spinneret assembly, the rectification type rapid spinneret assembly comprises a transfer box, a pressurization cavity, a rectification cavity and a spinneret plate, the transfer box is fixedly connected with the material mixing and stirring assembly and located on one side of the material mixing and stirring assembly, and the pressurization cavity is located on the other side of the material mixing and stirring assembly; the spinneret plate is fixedly connected with the transfer box and located on the side, away from the mixing and stirring assembly, of the transfer box, the pressurizing cavity is fixedly connected with the spinneret plate and located on the side, close to the interior of the transfer box, of the spinneret plate, and the rectifying cavity is fixedly connected with the spinneret plate and located on the side, away from the interior of the transfer box, of the spinneret plate. The rectifying cavity is formed in the side, away from the transfer box, of the pressurizing cavity, and an original spray head is modified and replaced with the rectifying type rapid spinning assembly, so that the problems that the melt-blowing die head is unreasonable in design, spinning is not uniform, and the fiber quality and the product performance are affected are effectively solved.

A non-woven fabric is provided that includes a first non-woven layer comprising a first plurality of fine fibers. The first plurality of fine fibers comprises a first polymeric material comprising (i) a first polymeric component and (ii) optionally one or more first additives, where the first polymeric component comprises a first recycled polypropylene (rPP) comprising a visbreaking spunbond grade polypropylene, and the second polymeric component comprises a second recycled polypropylene (rPP) comprising a visbreaking spunbond grade polypropylene. The visbroken spunbond grade polypropylene has a first melt flow rate (MFR) prior to visbreaking and a second MFR after visbreaking, and wherein the second MFR is greater than the first MFR.

A polypropylene composition (PC) comprising: a. from 95.0 to 99.99 wt.-%, of a polypropylene (PP), preferably a propylene homopolymer (HPP); and b. from 0.01 to 5.0 wt.-%, of a compound according to Formula (I), wherein each R is independently selected from C1 to C6 alkylene, C2 to C6 alkenylene and a single bond, each R′ is independently selected from H and C1 to C6 alkyl, each R″ is independently selected from H and C1 to C22 alkyl, wherein each alkylene, alkenylene and alkyl group may optionally be substituted by deuterium or fluorine, and the two substituents on the central benzene ring may be either positioned in an ortho, meta or para relationship; wherein the polypropylene composition (PC) has an MFR2 of from 400 to 5000 g / 10 min and a melting temperature Tm of from 140 to 170° C.

The invention relates to a bicomponent fiber comprising a first component comprising a first polypropylene homopolymer and a second component comprising a second polypropylene homopolymer and a slip agent, wherein the slip agent is selected from the group consisting of stearyl erucamide, polyol esters of monocarboxylic acids, pentaerythritol monooleate, saturated and unsaturated fatty acid amides or ethylenebis(amides), glycols, polyether polyols, adipic acid and sebacic acid and combinations thereof and wherein the amount of the slip agent with respect to the second component is 0.05 to 1.00 wt%, wherein the first component has a melt flow index MFI1 determined according to ISO 1133-1:2011 at 230 ⁰C and 2.16 kg and the second component has a melt flow index MFI2 determined according to ISO 1133-1:2011 at 230 ⁰C and 2.16 kg of MFI2 and the difference between MFI1 and MFI2 is 0.0 to 25.0 dg / min

The present invention relates to a method (100) for producing a photocatalytic multicomponent fiber, the method comprising the steps of: providing a support mixture (110) comprising at least one thermoplastic polymer; providing an active mixture (120) comprising at least one organic polymer, at least one photocatalyst at a concentration of at least 10% by weight based on the weight of the active mixture, and at least one coupling agent that is resistant to oxidation; spinning a multicomponent fiber from the support mixture and the active mixture (130); and removing the at least one organic polymer from the surface of the multicomponent fiber to produce a photocatalytic multicomponent fiber (160). The present invention also relates to multicomponent fibers, textile products, and filters.

A meltblown material formed from a plurality of fibers that can withstand the effects of a gamma irradiation sterilization process without negatively impacting the bacterial filtration efficiency (BFE) and particle filtration efficiency (PFE) of the meltblown material (e.g., facemasks, surgical gowns, surgical caps, etc.) is provided. The fibers include a high melt flow rate (MFR) polyolefin. Further, both the fibers include specific antioxidants and a charge enhancer package that allow for the effective electret treatment of the resulting meltblown material prior to sterilization, where the filtration efficiency and of the material is improved post- sterilization compared to materials without the specific combination of antioxidants and charge enhancing components.

The present invention relates to the field of new materials, and discloses a method for preparing a low-frequency band sound-absorbing functional nanofiber for high-end equipment. The method includes: adding diisopropylamine peroxide or hyperbranched polyester to a first polymer resin to prepare a first spinning solution, so that the dynamic viscosity of the first spinning solution at 300 degrees Celsius is 1-10Pa·s; melt-blowing equipment is used to melt-blown the first spinning solution to obtain a first polymer fiber; decalin is added to a second polymer resin to prepare a second spinning solution, so that the dynamic viscosity of the second spinning solution at 140 degrees Celsius is 10-50mPa·s, and a flash evaporation device is used to flash-evaporate the second spinning solution to obtain a second polymer fiber; under the traction of a fan, the first polymer fiber at the outlet of the melt-blown device and the second polymer fiber at the outlet of the flash evaporation device are mixed evenly using multiple air nozzles to obtain low-frequency band sound-absorbing functional nanofibers. The preparation method of the present invention is simple and has better sound absorption effect.

The invention relates to a melt-blown web comprising melt-blown fibers obtained by a) melt-mixing a propylene-based polymer, a first peroxide and a second peroxide at temperatures between 180 ºC and 240 ºC, preferably between 200 ºC and 220 ºC, wherein the first peroxide has a half-life time of 1 hour at a first temperature T1 / 21 and the second peroxide has a half-life time of 1 hour at a second temperature T1 / 22, wherein T1 / 22 is higher than T1 / 21 and b) processing the composition obtained by step a) by a melt-blown process at temperatures between 240 ºC and 300 ºC, preferably between 245 ºC and 280 ºC, to provide the melt-blown fibers.