70 results about "Olefin fiber" patented technology

The present invention provides a mask filter exhibiting a high antimicrobial/antiviral activity, a high dust filtration ability, a high ventilation characteristic, a high failure-strength and a high workability into a mask and the mask produced using such mask filter. An antimicrobial polyolefin fiber sheet is provided wherein the polyolefin fiber sheet has one or more spots in which 1/100 or more by volume of individual inorganic antimicrobial agent particles are exposed on surfaces of polyolefin fibers per fiber sheet area of 1.0×10⁻² mm² or has one or more spots in which the inorganic antimicrobial agent particles are exposed on the surfaces of polyolefin fibers each occupying an area of 0.01 μm² or larger per fiber sheet area of 1.0×10⁻² mm². Such polyolefin fiber sheet is arranged as the core layer and this core layer is sandwiched between upper and lower layers of dry nonwoven fabric to form the mask filter in the form of a laminated sheet. Such mask filter is used to form the mask.

A composite material which has excellent ballistic performance and has improved flexibility. Surprisingly, it has been found that a combination of poly(alpha-olefin) fiber and matrix resin provides these desirable product features. The resin matrix is a block copolymer of a conjugated diene and a vinyl aromatic monomer, preferably a styrene-isoprene-styrene block copolymer, that is applied as an aqueous composition. The fiber has a tenacity of at least about 35 g/d and a tensile modulus of at least about 1200 g/d. The composite has a total density equal to or less than about 100 g/m² and a stiffness of less than about 2.5 pounds (1.14 kg) for a two layer structure of the composite, and a total areal density equal to or less than about 190 g/m² and a stiffness of less than about 3.0 pounds (1.36 kg) for a four layer structure of the composite. The Peel Strength for a two layer structure of less than about 1.0 pounds (0.45 kg) for a two layer structure of the composite, and less than about 0.7 pounds (0.32 kg) for a four layer structure of the composite. The process of this invention permits fabrication of these desirable products in a cost-effective manner. Body armor made from the composite has improved flexibility and excellent ballistic characteristics.

A non-woven substrate having a vibrant graphic applied thereto is made by feeding to a printing apparatus a non-woven substrate having a fibrous non-woven web formed at least in part of polyolefin fibers. An ink composition having a viscosity in the range of about 28 seconds to about 35 seconds as determined using a Zahn #2 cup and including at least one solvent having an evaporation rate relative to n-butyl acetate of less than 0.8 is supplied to the printing apparatus. The printing apparatus is operated to apply the ink composition to the fibrous non-woven web while the fibrous non-woven web is in a generally dry condition to form a graphic thereon having a thickness of less than or equal to about 5 microns. The ink composition is then allowed to dry on the fibrous non-woven web.

The invention discloses a manufacturing method for a polyolefin fiber for adsorbing an organic liquid, which comprises the following steps: 1) adding 500-2000ml polymeric monomers, initiating agents accounting for 0.5-0.8% of the total mass of the polymeric monomers, 1500-6000ml deionized water and dispersing agents accounting for 0.5-1% of the total mass of the deionized water into a polymeric kettle, fully stirring till forming a homogeneous phase solution, and then introducing nitrogen, heating up to 80-85 DEG C and reacting for 2-5 hours, and then heating up to 90-95 DEG C and continuing reacting for 1-2 hours, thereby obtaining a reaction product; washing, drying and crushing the reaction product, thereby obtaining a white powdered copolymer; 2) drying the obtained copolymer, mixing the copolymer with polyolefin granular materials according to the mass fraction of (10-50):(90-50), and then extruding from a double-screw machine and pelletizing, wherein the polyolefin granular materials are fibrous polypropylene or polyethylene granular materials with a spinning temperature of 140-250 DEG C; and 3) melting and spinning the granular materials by using the double-screw machine, thereby obtaining the polyolefin fiber.

The present invention concerns a flame retardant (FR) lofted lightly needlepunch nonwoven fabric useful in household goods and particularly for mattresses. The nonwoven fabric comprises at least one of FR rayon fiber, FR acrylic fiber, FR melamine fiber, FR polyester fiber, FR polyolefin fiber, or FR resin coated fiber and nonbonding, nonFR synthetic and/or natural fiber mechanically bound together by a needlepunch process. The present invention also contemplates a mattress constructed from the FR lofted lightly needlepunch nonwoven fabric comprising FR rayon fiber, FR acrylic fiber, FR melamine fiber, FR polyester fiber, FR polyolefin fiber, or FR resin coated fiber. The mattress from this construction passes the California Test Bulletin 603 stringent conditions for mattresses used in residential places. Preferably the nonwoven fabric has a batt weight of at least 2.25 oz./sq.yd. and preferably between 2.25 oz./sq.yd. and 20 oz./sq.yd.

The invention belongs to a composite membrane for a secondary nickel-zinc cell. The composite membrane is in a two-layer composite structure; one layer is a polypropylene microporous membrane; the other layer is nonwoven fabric containing an ultrafine polyolefin fiber; the surface density of the composite membrane is 38g/m<2> to 80g/m<2>; and the thickness is 0.1-0.2mm. According to the composite membrane for the secondary nickel-zinc cell, the battery assembly process becomes simple and feasible; malposition and creases between two layers are avoided; base cloth of the membrane does not easily generate the crease in the radiation grafting process; keeping of the smooth membrane is facilitated; internal surface carboxyl and external surface carboxyl of the composite membrane and (or) sulfonyle hydrophilic functional groups are provided by radiation grafting of acrylic acid and (or) sodium p-styrenesulfonate; and the composite membrane has permanent hydrophilicity.

A composite membrane used for a secondary alkaline zinc-manganese dioxide battery, and a preparation method therefor are disclosed, belonging to the technical fields of battery membranes. The composite membrane is in a dual-layer composite structure comprising polypropylene microporous membrane and wet process nonwoven fabrics containing ultra-fine polyolefine fibers and vinylon fibers; and the composite membrane is 0.08-0.12 mm in thickness. The composite membrane has the following aspects of performances: (1) the composite membrane is good in zinc oxide dendritic crystal resistance due to the existence of the microporous membrane; (2) the composite membrane can be processed into membrane pipes easily through an automatic winding machine; (3) the composite membrane is radiation grafted with crylic acid and/or sodium styrene sulfonate to endow the inner and outer surfaces with carboxyl and/or sulfonic acid group hydrophilic functional group, so that the composite membrane has permanent hydrophilicity; and (4) the composite membrane is quite high in chemical stability.

The invention relates to a soilless sod and its preparation method and an application thereof. The soilless sod is prepared by the recombination of polyolefin fibrous reticulums and mixed fiber cloth, wherein the mixed fiber cloth is positioned between two layers of polyolefin fibrous reticulums. The mixed fiber cloth is made from raw materials of bamboo fiber, crop straw, coir fiber and nylon wire. Plant seeds are uniformly distributed on the mixed fiber cloth by the use of a seeder so as to form the mixed fiber cloth containing plant seeds. The preparation method provided by the invention comprises the following steps of: respectively compacting the polyolefin fibrous reticulum and the mixed fiber cloth through a briquetting machine, placing the compacted mixed fiber cloth between the two layers of polyolefin fibrous reticulums, braiding them together by the use of a braiding machine to form net cloth, and compacting by the briquetting machine to obtain the soilless sod. The invention has the following advantages: the polyolefin fibrous reticulum has strong permeability, corrosion resistance and strong tension; the raw material straw source is abundant; waste is changed into values; production processing is simple; cost is low; construction is fast; the soilless sod is widely applied with no environmental pollution, has an obvious effect of protecting water and soil and is easily popularized.

A heating apparatus and process useful for drawing ultrahigh molecular weight polyolefin fibers, such as polyethylene fibers. The heating apparatus includes a first set of rolls and a plurality of aligned ovens. The apparatus includes a second set of rolls at the exit of the ovens which rolls are adapted to provide the desired drawing of the polyolefin fibers. The apparatus and process provide a single draw step in a heated environment, with the use of preferably four or six horizontal ovens.

The invention relates to novel adhesive alpha-olefin inter-polymers which are largely amorphous and have a rheological behavior that makes them suitable for adhesive use, both without and with minimzed amounts of tackifying resins. Specifically, the invention poly-alpha olefin inter-polymer may be composed of A) from 60 to 94% of units derived from one alpha mono-olefin having from 3 to 6 carbon atoms and B) from 6 to 40 mol % of units derived from one or more other mono-olefins having from 4 to 10 carbon atoms and at least one carbon atom more than A); and C) optionally from 0 to 10 mol % of units derived from another copolymerizable unsaturated hydrocarbon, different from A) and B); the diad distribution of component A in the polymer as determined by ¹³C NMR as described herein showing a ratio of experimentally determined diad distribution over the calculated Bernoullian diad distribution of less than 1.07; and the storage modulus G′ of said polymer, determined upon cooling as described herein, intersecting a value of 3.10⁵ Pa at a temperature of less than 85° C. The invention also describes polymerization processes suitable for the manufacture of these adhesive alpha-olefin inter-polymers.

A method for producing cardable, hydrophobic polyolefin-based staple fibres by applying to spun filaments a first spin finish comprising at least one cationic antistatic agent, in particular a quaternary ammonium salt, stretching the filaments, applying to the stretched filaments a second spin finish in the form of a dispersion comprising at least one hydrophobic lubricant selected from a fatty acid amide condensation product and a hydrocarbon wax, the second spin finish optionally further comprising a polydiorganosiloxane in an amount of up to 15 % by weight, and crimping, drying and cutting the filaments to obtain staple fibres; as well as texturized, cardable, polyolefin-based staple fibres prepared by the method and hydrophobic nonwoven materials produced from such fibres. The fibres are able to be carded at extremely high speeds and are particularly suitable for use in the preparation of thermally bonded hydrophobic nonwoven fabrics in which a dry, water-repellant surface which can function as a liquid barrier is desired, e.g. for disposable diapers, feminine hygienic products and medical products.