608results about "Artificial filaments from cellulose derivatives" patented technology

The disclosure relates to a melt-blown non-woven fabric based on cellulose esters, with fibers of mean diameter less than about 10 microns. The fabric contains 0-10 wt. % extractable softener, has a reflection factor determined according to DIN 53 145 Part I (1992) of more than 60% and the cellulose ester has a degree of substitution DS of about 1.5-3.0. The softener is preferably water-extractable. A melt-blown non-woven fabric is produced with the cellulose ester as follows: a cellulose ester, cellulose acetate, with a DS of about 1.5-3.0, in particular 1.7-2.7, is mixed with softener in a weight ratio of about 2:1 to 1:4 and simultaneously heated and melted. The mixture of softener and cellulose ester has a melting index MFI (210/2.16) according to DIN 53 735 of about 400 to 5 g/10 min., in particular 300 to 50 g/10 min. The melt is worked in a melt-blown spinning device into a melt-blown non-woven fabric and the softener is then extracted with a softener solvent to leave a proportion of 0-10 wt. %. The melt-blown non-woven fabric is especially suitable as a filter material.

A membrane is provided including a coating layer having cellulose nanofibers produced from oxidized cellulose microfibers and an electrospun substrate upon which the coating layer is applied. The nanofibers of the electrospun substrate have a diameter greater than that of the cellulose nanofibers. The membrane also has non-woven support upon which the electrospun substrate is disposed. Microfibers of the non-woven support have a diameter greater than that of the nanofibers of the electrospun substrate. Application of electrospun membrane is in microfiltration area, while the cellulose nanofiber membrane serves in ultra-filtration, nanofiltration, and reverse osmosis after chemical modification.

The invention relates to a process for forming fibers from a spinning solution utilizing a high speed rotary sprayer. The fibers can be collected into a uniform web for selective barrier end uses. Fibers with an average fiber diameter of less that 1,000 nm can be produced.

The present invention relates to a method of producing polysaccharide fibres (8), wherein the polysaccharide is dissolved and the solution is sprayed into a bath (7) which contains a water-miscible organic solvent and a cross-linker. The invention also relates to a polysaccharide fibre (8) produced by the method, and to an absorbent article which includes the polysaccharide fibre (8).

A filter material adapted for use as a filter element of a smoking article is provided, the filter material including at least one segment of fibrous tow having a plurality of degradable particles dispersed therein, the degradable particles comprising a starch material. Exemplary starch materials include naturally-occurring starch, hydroxyalkylated starch, starch esters, ionically modified starch, oxidized starch, hydrolyzed starch, plasticized starch, gelatinized starch, grafted starch, crosslinked starch, transglycosylated starch, starch ethers, and mixtures thereof, as well as blends of starch with other polymers. Filter elements and smoking articles, such as cigarettes, that contain the filter material are also provided. A method of preparing polymer fibers for use in filter elements is also provided, the method including adding the starch material to a fiber precursor solution prior to fiber extrusion or dry-blending the starch material with the polymer material to be formed into fibers.

The present invention provides a cellulose ester composition, containing 1 to 99% by weight of cellulose triacetate prepared by substituting hydroxyl groups of cellulose with acetyl and having a degree of substitution with acetyl, DSace, which satisfies the relationship: 2.7</=DSace</=3.0, and 99 to 1% by weight of a mixed fatty acid ester of cellulose prepared by substituting hydroxyl groups of cellulose with acetyl and acyl groups having three or more carbon atoms and having degrees of substitution with acetyl and acyl groups having three or more carbon atoms, DSace and DSacyl, respectively, which satisfy the relationships: (I) 2.20</=DSace</=2.95, (II) 0.05</=DSacyl</=0.80 and (III) 2.60</=DSace+DSacyl</=3.00.

A method for producing an optical film comprising steps of mixing a heated and molten cellulose ester having an acylated degree for from 2.5 to 2.9 and at least one of a UV absorbent having at least two benzotriazole skeletons and a UV absorbent having a weight average molecular weight of from 2,000 to 50,000 to form a mixture, and extruding the mixture to form a film.

Disclosed are fibers which contain identification fibers. The identification fibers can contain a one or more of chemical markers and one or more distinct features, or taggants, which may vary among the fibers or be incorporated throughout all of the fibers. The chemical markers and distinct features can be representative of specific supply chain information. The supply chain information can be used to track the fibers from manufacturing through intermediaries, conversion to final product, and/or the consumer. The disclosed embodiments also relate to the method for making and characterizing the fibers. Characterization of the fibers can include identifying chemical markers and distinct features and correlating the chemical markers and distinct features to manufacturer-specific taggants to determine supply chain information.

Disclosed is a method of making an acetate tow bands comprising identification fibers which can be used for tracking and tracing the acetate tow band through at least part of the supply chain. Each identification fiber exhibits at least one distinct feature. Each group of distinguishable identification fibers can exhibit a taggant cross-section shape, a taggant cross-section size, or combination of the same taggant cross-section shape and same taggant cross-section size. The distinct features and the number of fibers in each group of distinguishable identification fibers can represent at least one supply chain component of the acetate tow band, including the manufacturer of the acetate tow band and the customer of the acetate tow band. The identification fibers can be produced on a cellulose acetate tow line using one or more spinnerets with spinneret holes to produce the taggant cross-section shapes and/or taggant cross-section sizes.

The present invention relates to a preparation method for regularized static electricity spinning hollow fiber, and the method comprises the procedures that: firstly, high molecular compound is dissolved in good solvent to be made into uniform solution; secondly, poor solvent is added to be dispensed into spinning raw liquid, and the volume ratio of the good solvent and the poor solvent is 10/1 to 1/3; thirdly, the spinning raw liquid is added into a container, is controlled and extruded by a micro-syringe pump, a jet opening is connected with a high voltage positive pole, a grounding microelectrode with the removable area of 0 to 100 mm ² is taken as a negative pole, various parameters of static electricity spinning are adjusted, and the spinning raw liquid carries on the static electricity spinning; fourthly, the grounding microelectrode backwards and continuously moves, and a continuous regularized static electricity spinning hollow fiber bundle is obtained; fifthly, the continuous hollow fiber bundle obtains the regularized static electricity spinning hollow fiber through winding and collecting. The preparation method provided by the present invention is simple and feasible, and the obtained static electricity spinning hollow fiber has the potential application and the prospect in the fields such as nanowire devices, filtering materials, and composite reinforcing materials, etc.

Disclosed are acetate tow bands comprising identification fibers which can be used for tracking and tracing the acetate tow band through at least part of the supply chain. Each identification fiber exhibits at least one distinct feature. Each group of distinguishable identification fibers can exhibit a taggant cross-section shape, a taggant cross-section size, or combination of the same taggant cross-section shape and same taggant cross-section size. The distinct features and the number of fibers in each group of distinguishable identification fibers can represent at least one supply chain component of the acetate tow band, including the manufacturer of the acetate tow band and the customer of the acetate tow band. The distinct features are detectable in a filter comprising the acetate tow band.

A method of producing fiber having functional mineral powders includes the steps of a first pulverizing functional mineral which crystal form of is pinacoid, a second closely pulverizing the first pulverized functional mineral powders to be less than 1/3 granularity of desired fineness, mixing and synthesizing 0.1-10 weight % of the second pulverized functional mineral powders and 90-99.9 weight % of a chemical resin, and spinning the mixture of functional mineral powders and the chemical resin.

This invention relates to a static filature device pushed by a gas layer and its industrial application, in which, the device includes: a gas circulation push device, a gas drying and heating device, a sealed filaturing room, and air inlet at the top of the sealed room, a material room at the upper part of the sealed room, a spinneret at the lower part of the material room, electrode connected on the spinneret, a material receiving device at the lower part of the sealed room, an air outlet at the lower-right part of the room, a cooling device cooling gas flow with solvent and a solvent recovering device, which can make static filature to molding to polymers, increases spinning efficiency greatly by applying multiple sprayers, controls the temperature and humid of the entry flows to alter the temperature and humid of filature raw liquid, and further more, the pushed gas flow can drive the volatiled solvent in the process to flow out to be recovered.

Hydroxyl polymer-containing compositions, especially hydroxyl polymer-containing compositions that can be processed into polymeric structures, especially polymeric structures in the form of fibers are provided.

The invention provides a Cellulose acetate (CA) thin, porous membranes produced by electrospinning precursor polymer solutions in acetone at room temperature and a process for manufacturing the same. The invention also provides a Cellulose acetate (CA) thin, porous membranes produced by electrospinning precursor polymer solutions in acetone at room temperature further comprising ceramic nano-structured component (carbon nanotubes) in the polymer membranes to provide additional strength and porosity and a process for manufacturing the same. The fabricated CA-CT membranes specifically mimic the topography and porosity of natural Extracellular Matrix (ECM) and can be used as scaffolding for cell growth.

The present invention is generally related to a high capacity, high efficiency nonwoven filtration media comprising a gradient pore structure. In particular, the filtration media can comprise thermoplastic synthetic microfibers, fibrillated fibers, staple fibers, and a binder. Furthermore, the filtration media may be produced without the use of glass fibers or microglass fibers. A process for making the filtration media is also provided. Consequently, the filtration media of the present invention does not cause the same issues as conventional filtration media that comprises glass fibers and/or microglass fibers. Moreover, the filtration media can be used to treat fuel, lubrication fluids, hydraulic fluids, and various other industrial gases.