75results about "Monocomponent polypropylene artificial filament" patented technology

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.

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.

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).

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 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.

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.

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 invention relates to a method (100) for manufacturing a photocatalytic multicomponent fiber, comprising the following steps: 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 relative to the weight of active mixture, and at least one oxidation-resistant coupling agent; spinning (130) a multicomponent fiber from the support and active mixtures; removing (160) the at least one organic polymer at the surface of the multicomponent fiber so as to generate a photocatalytic multicomponent fiber. The invention also relates to a multicomponent fiber, a textile and a filter.

A carded nonwoven (110) including synthetic staple fibers (120), wherein the synthetic staple fibers have a hydrophilic polypropylene-based composition, said hydrophilic polypropylene-based composition having a polypropylene-based matrix, an ethylene-propylene copolymer additive and a hydrophilic melt additive is disclosed.

The electret of the present invention comprises: inorganic particles and a dispersant in a polyolefin resin; and a nitrogen-containing compound, wherein a value of a / b is 0.3 or smaller when a represents a maximum value of a depolarizing current at 50 to 100°C as measured by a TSC method, and b represents a maximum value of a depolarizing current at 100°C or higher as measured by the TSC method.

The SB non-woven fabric of the present disclosure comprises a plurality of hollow fibers. The coefficient of variation in the hollow ratio of the hollow fibers is less than 10%.

A method for producing a nonwoven laminate with at least two layers, wherein both layers are produced as spunbond nonwovens. To produce each layer, continuous filaments are spun using at least one spinnerette, then cooled, subsequently drawn, and finally laid down into a web on a lay-up device. At least one first spunbond nonwoven is produced from crimped multi-component filaments, and at least one second spunbond nonwoven is produced from mono-component filaments. The mono-component filaments of the second spunbond have a polypropylene-based elastomer.

A nonwoven fabric. The nonwoven fabric can include a first surface and a second surface and a visually discernible pattern of three-dimensional features on one of the first or second surface. Each of the three-dimensional features can define a microzone comprising a first region and a second region. The first and second regions can have a difference in values for an intensive property.

The invention relates to a hollow fiber and yarn. The hollow fiber is provided with a square hollow core part and blades, and the outer surface of the core part is square; the number of the blades is eight, and the blades are located at the four corners and the middle positions of the four edges of the square of the outer surface of the core part respectively. The blades protrude outwards along the straight line where the center point of the hollow fiber and the connecting points of the blades and the outer surface of the core part are located. The fiber disclosed by the invention can keep a good hollow rate in the use process, and the thermal insulation and moisture absorption of the fiber can be always kept at a better level.

A filament for a pile yarn. The filament is a multi-component filament, comprising a core (10), at least a first sheath (20) at least partly enclosing the core (10) and optionally a second sheath (30) at least partly enclosing the first sheath (20). The core (10) comprises recycled polypropylene, and the first sheath (20) comprises polypropylene and a particulate, opaque additive.

The subject matter of the invention is an adhesive tape, in particular a wrapping tape for sheathing cables in automobiles. The adhesive tape is equipped with a textile support and at least one adhesive layer applied to one or both sides of the support. The support is coloured by an organic dye which is composed of yellow and red pigments. The yellow pigments are based on anthraquinone. According to the invention, pigments based on perylene are used as red pigments.

A carded nonwoven (110) comprising synthetic staple fibers (120), wherein the synthetic staple fibers comprise or consist of a hydrophilic polypropylene-based composition, said hydrophilic polypropylene-based composition comprising a polypropylene-based matrix, an ethylene-propylene copolymer additive and a hydrophilic melt additive.

A carded nonwoven (110) comprising synthetic staple fibers (120), wherein the synthetic staple fibers comprise or consist of a hydrophilic polypropylene-based composition, said hydrophilic polypropylene-based composition comprising a polypropylene-based matrix, an ethylene-propylene copolymer additive and a hydrophilic melt additive.

An absorbent article including a durably hydrophobic carded nonwoven (110) in particular as topsheet or acquisition layer is presented. The nonwoven has synthetic staple fibers (120) that include a hydrophilic polypropylene-based composition. The hydrophilic polypropylene-based composition has a polypropylene-based matrix, an ethylene-propylene copolymer additive, and a hydrophilic melt additive.

An absorbent article comprising a durably hydrophobic carded nonwoven (110) in particular as topsheet or acquisition layer. The nonwoven comprises synthetic staple fibers (120) that comprise or consist of a hydrophilic polypropylene-based composition. The hydrophilic polypropylene-based composition comprising a polypropylene-based matrix, an ethylene-propylene copolymer additive and a hydrophilic melt additive.

A polypropylene composition (PC) comprising: a. 95.0 to 99.99 wt.-% of a polypropylene (PP), preferably a propylene homopolymer (HPP); and b. 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 C 22 alkyl, wherein each alkylene, alkenylene and alkyl can optionally be substituted with deuterium or fluorine, and the two substituents on the central phenyl ring can be positioned in ortho, meta or para relationship; wherein the polypropylene composition (PC) has a MFR2 of 400 to 5000 g / 10min and a melting temperature Tm of 140 to 170 °C.

The present invention relates to (i) an azeotropic or azeotrope-like composition comprising cyclopentane and 1H,1H,2H-heptafluorocyclopentane or comprising 2‑methylpentane and 1H,1H,2H-heptafluorocyclopentane, (ii) a spin fluid for flash spinning comprising these azeotropic or azeotrope-like compositions and a polymer, and (iii) a process for the preparation of plexifilamentary film-fibril strands of polymers using the spin fluid.