532results about "Artificial filament recovery" patented technology

This invention relates to a process of melt blowing a cellulose solution through a concentric melt blown die with multiple rows of spinning nozzles to form cellulosic microfiber webs with different web structures. The process comprises the steps of (a) extruding a cellulose solution (dope) through a melt blown spinneret with multiple rows of spinning nozzles; (b) drawing each individual extrudate filament to fine fiber diameter by its own air jet; (c) coagulating and entangling the fine fibers with a series of pressured hydro needling jets of recycling solution of the mixture of cellulose solvent and non-solvent in the spin-line; (d) collecting the stream of microfibers, air and needling jets on a moving collecting surface to form cellulosic fiber web; (e) hydro-entangling the said pre-bonded web downstream with at least one set of hydro needling jets of recycling solvent/non-solvent solution for forming well bonded nonwoven web; (f) regenerating the fine fibers in at least one bath for at least 5 seconds; (g) further regenerating and washing the fine fibers in another bath for at least 5 seconds; (h) pinching the well bonded melt blown cellulosic nonwoven with pressure rollers to remove major portions of the non-solvent; (i) drying the nonwoven web by heat, or vacuum or both, and (j) winding the nonwoven web into rolls.

A three-dimensional object forming apparatus is provided, which at least comprises: a construction stage, a printing module, plural temporary storage tanks, plural powder supplying tanks, a construction tank, a printing quality inspection component for forming a pattern to determine whether the printing module is blocked or not, a maintenance device, and a dust-proof device.

Disclosed is a process for the preparation of shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles, having high transparency and low haze, and comprising immiscible blends of at least one polyester comprising 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend have refractive indices which differ by about 0.006 to about −0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce shaped articles having oxygen-scavenging properties.

Disclosed is a process for the preparation of shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles, having high transparency and low haze comprising immiscible blends of one or more thermoplastic polymers selected from polyesters, polycarbonates, and polyarylates, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about −0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce shaped articles having oxygen-scavenging properties.

An in-mold and in-line decorating method is disclosed which, using a single sheet layer, allows the placement of the highest possible quality graphics into the surface of products made from a variety of moldable thermoplastic, thermoset, and vulcanizable materials using a variety of molding processes. The methods also provide new or improved capabilities for product identification, safety, and serialized tracking.

A by-product waste material removal system for solid deposition modeling. As excess build and support material is removed during the build as a by-product waste the removal system collects the by-product waste material into a waste receptacle for disposal. The by-product waste material removal system requires no mechanical systems.

A plastic article or plastic container reclamation process if provided in which plastic containers are divided into relatively large pieces, then washed, agitated and separated using an aqueous solvent to remove residual materials. The residual materials such as motor oil are reclaimed for reuse and the aqueous solvent is regenerated for reuse in the process. Residual materials such as dirt, labels and adhesives from the plastic containers is recovered for recycling or passed to waste for disposal or reuse.

The method for recovering alkali and hemicellulose from waste liquor produced by producing optical fibre includes the folloiwng steps: making the pressed liquor containing alkali and hemicellulose undergo the processes of prefiltration and fine filtration, and feeding it into membrane separation equipment to obtain the penetrated liquor containing alkali and concentrate containing hemicellulose, and the alkaline liquor concentration in the obtained penetrated liquor can be up to 80-250 g/l, and the final alkali content in the concentrate is 5-30 g/l, and the hemicellulose content is 100-200 g/l. Said technological process is simple, can effectively separate and purify hemicellulose and alkali liquor.

A three-dimensional object-forming apparatus is disclosed, which includes an in-batches powder-rationing tank system, a construction tank system, a printing powder-applying system, a rapid drying heating system, a printing maintenance device, a dust-proof device, a successive liquid-supplying device, a powder auto-filtrating and recycling device, and a print quality detection device.

The present invention provides, e.g., methods to recycle and/or reduce plastic, non-plastic, or a combination thereof, from a waste stream. The methods of the present invention include contacting the plastic waste with infrared (IR) energy at one or more frequencies and at one or more intensities, over a period of time effective to heat plastic present in the plastic waste.

A plastic fastening device that includes a recycled material. In one embodiment, at least a portion of the fastening device includes a blend of two or more thermoplastic resins, at least one of which is a recycled material. The blend may include, for example, a fresh thermoplastic resin and a recycled thermoplastic resin. The fresh thermoplastic resin may include, for example, one or more of a polyethylene (PE), a polyamide (PA), or a polycarbonate (PC). The recycled thermoplastic resin may include, for example, a recycled polyethylene terephthalate (rPET). In a preferred embodiment, the blend of two or more thermoplastic resins includes a blend of (i) rPET and (ii) one of a low-density polyethylene (LDPE), a LDPE/LLDPE (linear low-density polyethylene) blend and LLDPE, (iii) wherein the rPET constitutes about 88% to 98% of the total material content and the LDPE, the LDPE/LLDPE blend, or the LLDPE constitutes the balance.

The invention provides a solvent recovery method in the cellulose fiber preparation process by using ionic liquid as the solvent, which comprises subjecting coagulating bath components to precipitation, filtration, vacuum distillation and normal atmosphere distillation.

The invention relates to continuous high efficiency nano spinning solution (15), a nanofiber nonwovens manufacturing method and a manufacturing device which not only has high manufacturing efficiency but form better thickness of the nanofiber nonwovens. The manufacturing device comprises a solution supply system, a solution feeding pipe (8), a connecting mechanism and a metal roller (6); a metal strainer (10) and a fiber receiving web (11) which have the same shaft with the metal roller are sequentially arranged on the outside of the metal roller (6), an unreel roller (12) and a winding roller (13) are arranged on the fiber receiving web (11), and pores (7) are cut on the hollow metal roller (6). The manufacturing method includes the steps: (1), polymer spinning solution (15) is prepared; (2), an electric field is arranged between the metal roller (6) and metal strainer (10); (3), the metal roller (6) is revolved at a certain speed; (4) a measuring pump (4) is led to the metal roller (6) for even internal inputting; (5), the nanofiber is received. The invention is good for the scale manufacturing of static spinning.

This application describes a method of preparation of a natural graphene cellulose blended meltblown nonwoven fabric, which comprises using a graphite powder as a raw material for preparing a graphene solution, adding the graphene solution to a slurry formed by mixing and dissolving a wood pulp with N-methylmorpholine N-oxide (NMMO), removing the water content thereof to form a spinning dope, and then directly preparing the natural graphene cellulose blended meltblown nonwoven fabric by a meltblown process. The present method does not require a highly toxic hydrazine hydrate solution. Further, by increasing the adding ratio of the graphene solution in the manufacturing process, control of the antistatic properties and thermal transferring function can be achieved, and thereby various requirements of different consumers can be satisfied. Besides, the fabric can decompose naturally after being used, and thus the product is harmless, natural, and environmentally friendly.

There is disclosed a method of and an arrangement for dismantling and storage of objects comprising alkali metal containing substances, in particular lithium containing batteries, in the presence of a protective atmosphere, wherein the protective atmosphere is carbon dioxide. The arrangement comprises a gas-tight chamber for bringing the objects under a protective environment, and a gas-tight chamber for dismantling the objects within the protective atmosphere of carbon dioxide gas.

The invention relates to a recycling method of NMMO waste liquor, which provides a recycling method of NMMO in the waste liquor of fiber production with solvent method. According to the specific method of the invention, after passes through in sequence the cation resin exchange column and the anion resin exchange column, the NMMO waste liquor is in decompression and evaporation to the refractive index of 1.480 and cooled, thus the NMMO containing a crystallization water is produced. The cation resin is the macroreticular type or gel-type strong acid polystyrene cation exchange resin, and the anion resin is the macroreticular type or gel-type alkalescence acrylic acid anion resin. Compared with the prior recycling method, in the method of the invention, the recovery rate of the NMMP waste liquor is increased from 95% to 99.5%. In the discharged wastewater after the recycling, the concentration of NMMO is reduced and the steam is saved. Therefore, the textile production costs are greatly reduced.

The invention discloses a method to regenerate dry-spun spandex waste silk to normal spandex silk in spandex silk preparing technique domain, which comprises the following steps: (1)adopting cryogenic breaking technology; changing the long fiber to short fiber; (2)removing oil solution on the surface of the spandex waste silk with water and detergent; (3)drying the water on the spandex waste silk; (4)adding into spandex waste silk, organic solvent and aids into reactor; reacting for 6-12 h at 45-100 deg. c; getting spinning raw liquid with proper viscosity; (5)removing bubble; spinning; oiling; modeling; getting spandex silk. This invention possesses simple operating course and little investment, which can get bigger economical benefit.

The invention relates to a method for recycling polyester waste silks, which comprises the steps of: firstly, recovering waste silk generated in the process for producing polyester, and cleaning the recovered waste silks to remove oiling agents and impurities, then performing drying to remove moisture in the waste silk, and making the waste silk into globular bubble materials; secondly, putting the made bubble materials into a drying tower for secondary full drying; and finally, adding the bubble materials into a spinning screw rod continuously and metrically, and mixing the bubble materials with primary slices and masterbatch for melting spinning to prepare colored terylene POY filaments. The drying power for drying the bubble materials and a drying power of the primary slices are mutually independent, and the drying tower for drying the bubble materials is a special drying tower for the bubble materials. In the method for recycling the polyester waste silk, the waste silk is made into the bubble materials, so that the problem of different specific mass gravities of the waste silk and the primary slices is solved effectively, the consistent blanking speed and uniform mixing of the materials are ensured, produced products have the higher stability, and the colored terylene POY filaments which have the same wide application range as the primary slices can be manufactured.