Processes for making fibrous structures and more particularly processes for making fibrous structures comprising filaments are provided.

Fluorine-free small molecule additives of structure ##STR00001##
where X.sup.1 and X.sup.2 are independently hydrocarbyl or heterohydrocarbyl; and Q.sup.1 and Q.sup.2 are independently Si(OSi(CH.sub.3).sub.3).sub.3 or (OSi(CH.sub.3).sub.2).sub.nOSi(CH.sub.3).sub.3 and where n is an integer from 0 to 30, inclusive for use in solid-state formulations, e.g., thermoplastic articles, for use in low hysteresis water repellent applications. Methods of preparing such compositions and additives.

A staple cartridge assembly for use with a surgical stapling instrument includes a staple cartridge including a plurality of staples and a cartridge deck. The staple cartridge assembly also includes a compressible adjunct positionable against the cartridge deck, wherein the staples are deployable into tissue captured against the compressible adjunct, and wherein the compressible adjunct comprises a first biocompatible layer comprising a first portion, a second biocompatible layer comprising a second portion, and crossed spacer fibers extending between the first portion and the second portion.

A non-woven fabric wipe having a layered fiber web structure. A first layer, a second layer, a fourth layer, and a fifth layer of the non-woven fabric wipe are all melt-blown fiber webs mainly composed of melt-blown fibers; a third layer of the non-woven fabric wipe is a wood pulp fiber web mainly composed of wood pulp fibers; the melt-blown fibers in the melt-blown fiber webs of the second layer and the fourth layer are partially interwoven in the adjacent wood pulp fiber web of the third layer, Because the non-woven fabric wipe of the present invention is composed of five layers of fiber webs, when the melt-blown fiber webs of the second layer and the fourth layer are consolidated, the portions interwoven with the wood pulp fibers are consolidated together with the interwoven wood pulp fibers, thereby forming a protective web that prevents the wood pulp fibers from moving.

A waterproof and moisture-permeable composite material is provided, which is composed of a waterproof and moisture-permeable membrane and a melt-blown non-woven fabric. The melting point of melt-blown non-woven fabric ranges from 80 C. to 130 C., in which the melt-blown non-woven fabric is a thermoplastic polymer which may be a thermoplastic polyether ester elastomer polymer. A method for forming a waterproof and moisture-permeable composite material includes: providing a thermoplastic polymer; performing a melt-blown process to the thermoplastic polymer by using an extruder to form a melt-blown fiber, so the melt-blown fiber on a conveyer belt with multiple meshes to form a melt-blown non-woven fabric; covering a moisture-permeable membrane on the melt-blown non-woven fabric to adhere the moisture-permeable membrane and the melt-blown non-woven fabric to form a waterproof and moisture-permeable composite material.

The present invention provides, for example, a melt-blown nonwoven fabric that is tear-resistant and that has high particle filtration efficiency. The present invention is, for example, a melt-blown nonwoven fabric including fibers. The fibers are formed from a resin composition that contains a poly(3-hydroxyalkanoate)-based resin. The poly(3-hydroxyalkanoate)-based resin includes a copolymer including a 3-hydroxybutyrate unit. A content ratio of the 3-hydroxybutyrate unit in the poly(3-hydroxyalkanoate)-based resin is greater than or equal to 80.0% by mole and less than or equal to 93.5% by mole. An average value of fiber diameters of the fibers is less than or equal to 8.0 m.

An enhanced flash evaporation/electrospinning composite spinning equipment includes a flash spinning equipment, an electrospinning equipment, and a grounded receiving conveyor belt; the flash spinning equipment includes a flash spinning spinneret unit, the flash spinning spinneret unit includes a first spinneret, and the first spinneret is grounded; the electrospinning equipment includes a high-voltage power supply and an electrospinning spinneret unit, the electrospinning spinneret unit includes a second spinneret, and the second spinneret is connected to the high-voltage power supply; the first spinneret and the second spinneret are both located above the receiving conveyor belt at opposite positions with a distance of D, and the value range of D is 15-40 cm. The enhanced flash evaporation/electrospinning composite spinning equipment has a simple structure, and can prepare products that are not easy to delaminate, and excellent in waterproof performance and air permeability.

Implantable adjuncts for use with a surgical instrument are disclosed. The implantable adjunct includes a first mesh positioned about a first side of the longitudinal knife slot and a second mesh positioned about a second side of the longitudinal knife slot such that the first and second meshes define a gap substantially aligned with the longitudinal knife slot of the staple cartridge body.

A barrier fabric is provided, in which the barrier fabric includes at least a first nonwoven layer comprising a plurality of first fibers defined by a first polymeric composition. The first polymeric composition includes (i) a first polymer component, and (ii) a first additive component comprising at least one non-fluorinated low-surface tension (NFLST) additives dispersed throughout the first polymeric composition.

The present invention relates to the manufacturing equipment for web materials comprising fibers and particulate material, to a process of operating such an equipment and to particular materials resulting therefrom. Coaxially meltblown fibres are combined with a stream of particulate or short fiber material and the resulting commingled mixture is deposited onto a collector. The meltblown fibers are formed by nozzles which are divided into two or more sub-arrays configured to produce two or more different types of fiber, having e.g. different diameters and/or polymer composition.