According to an example aspect of the present invention, there is provided a melt spinning method of cellulose based fibers with controlled molar masses and different side lengths, and continuous melt spun cellulose fibers thereof.

According to an example aspect of the present invention, there is provided a melt spinning method of cellulose based fibers with controlled molar masses and different side lengths, and continuous melt spun cellulose fibers thereof.

This disclosure describes meltblown methods, assemblies, and systems for polymer production. In one such implementation, a meltblown system provides improved uniform output and reduction of fiber size given certain polymer material and production rate. In certain meltblown implementations, the equipment may be ready and quickly swapped while provided in hot standby mode such that the maintenance down time is minimized. The disclosed meltblown equipment may include a polymer beam and air chamber and a die tip assembly. The die tip assembly, in certain embodiments, may quickly be attached onto or removed from the polymer beam and air chamber. In preferred embodiments, the meltblown system includes a single input (e.g., a specific type of polymer material). The meltblown system includes some tapered structures that facilitate polymer flow. The assembly mechanisms used in the meltblown system enables cleaning of the polymer distribution components with each use.

A nozzle has a body having a face extending in a longitudinal direction and transversely thereto in a transverse direction. The nozzle plate is provided with an array of melt openings and compressed-air openings on the face in a plurality of longitudinally extending rows and a plurality of transversely extending rows. A polymer melt to the nozzle openings to extrude the polymer melt downstream from the melt openings as polymer filaments and compressed air to the compressed-air openings to form air jets issuing downstream from the compressed-air openings between the polymer filaments. Only the polymer melt and no air is supplied to the melt openings such that only the polymer melt issues from the melt openings. Only compressed air and no polymer melt is supplied to the compressed-air openings such that only the compressed air issues from the compressed-air openings.

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.

A method of preparing polyester elastomer meltblown nonwoven fabric membrane with porous and high bonding strength includes the following steps of: (a) Adding a reaction solvent to a reaction solvent to thermoplastic polyester elastomer (TPEE) powder or granules to prepare a solvent mixture. (b) Adding a modifier to the solvent mixture, and mixing uniformly to prepare a first mixture, the modifier includes at least one of o-xylylenediamine, m-xylylenediamine, alpha, alpha′-diamino-p-xylene, 2,3,5,6-Tetrachloro-p-xylene-alpha,alpha′-diamine, and 1,3,5,7-Tetraazatricyclodecane. (c) Adding an initiator to the first mixture, and mixing uniformly to prepare a second mixture. (d) Drying the second mixture to form a masterbatch, and (e) preparing the polyester elastomer meltblown nonwoven fabric membrane by passing the masterbatch through a meltblown process.

Multi-row coaxial melt-blown system including support including first duct to convey polymeric fluid parallel to a delivery direction and second duct to convey air or gas, a box removably constrained to the support and including acceleration ducts parallel delivery direction including tubing in fluid connection with first duct to distribute the fluid, first holes parallel the delivery direction, centred and spaced relative to acceleration ducts along the delivery direction to house each part of a respective tube, second holes parallel the delivery direction for air or gas passage, and a slit extending transversely to the delivery direction between the acceleration ducts and the first holes in fluid connection with the second holes. The support includes a housing to contain the box and the slit extends in the box from side to side in fluid connection with the second duct to convey air or gas from second duct to second holes.

Disclosed is a skin cooling fabric that can provide a user with a soft tactile sensation as well as a cooling feeling or a cooling sensation, a polyethylene yarn having improved weavability, and a method for manufacturing the yarn. The skin cooling fabric of the present invention includes a plurality of weft yarns, and a plurality of warp yarns, wherein each of the weft yarns and warp yarns has a tensile strength of 3.5 to 8.5 g/de, a tensile modulus of 15 to 80 g/de, elongation at break of 14 to 55%, and crystallinity of 55 to 85%.

Articles, such as sanitary tissue products, including fibrous structures, and more particularly articles including fibrous structures having a plurality of fibrous elements wherein the article exhibits differential cellulose content throughout the thickness of the article and methods for making same are provided.

Disclosed herein are improvements to processes and equipment for the manufacture of composite nonwoven webs comprising a mixture of two or more different fibers and formed from at least two streams of air-entrained fibers. Adjacent the perimeter of an exit port of one of the fiber streams are located a series of spaced tabs and apertures. As a first stream of air-entrained fibers pass the series of tabs and apertures, vortices are formed therein. When mixed with a second stream of air-entrained fibers, the vortices within the first stream of fibers causes increased mixing of the fibers, helping to drive the first fibers deeper into the second stream of air-entrained fibers.