The present invention provides a creped tissue web having a CD Wet/Dry ratio that meets or exceeds satisfactory levels without the excess use of a wet strength resin. The satisfactory level of CD Wet/Dry ratio is generally greater than about 0.40, more preferably greater than about 0.42 and still more preferably greater than about 0.44, such as from about 0.40 to about 0.45. The satisfactory level of CD Wet/Dry ratio is surprisingly achieved by treating the tissue making furnish with a relatively modest amount of non-wood synthetic fibers, preferably fibrillated acrylic fiber.

An air entanglement system having a housing, a first rotatable surface disposed with the housing, and a second rotatable surface disposed with the housing proximate the first rotatable surface is described herein. The first rotatable surface may comprise a first plurality of air jets configured to air entangle a preform in situ. The second rotatable surface may be disposed with the housing proximate the first rotatable surface. The second rotatable surface may comprise a second plurality of air jets configured to air entangle the preform in situ. The air entanglement system may be configured to achieve negative pressure in response to being under suction.

An air entanglement system having a housing, a first rotatable surface disposed with the housing, and a second rotatable surface disposed with the housing proximate the first rotatable surface is described herein. The first rotatable surface may comprise a first plurality of air jets configured to air entangle a preform in situ. The second rotatable surface may be disposed with the housing proximate the first rotatable surface. The second rotatable surface may comprise a second plurality of air jets configured to air entangle the preform in situ. The air entanglement system may be configured to achieve negative pressure in response to being under suction.

A metal adsorption acrylic fiber wherein the strontium adsorption rate is 85% or more when the strontium adsorption rate is measured using the following measurement method. A strontium adsorption rate measurement method (strontium 0.1 ppm measurement method) involves immersing a metal adsorption acrylic fiber into an immersion fluid, collecting the immersion fluid as a testing solution 24 hours after beginning the immersion, analyzing the quantity of strontium in the testing solution, obtaining the concentration (C.sub.1) (ppm) of strontium in the testing solution, creating a contrast solution, analyzing the quantity of strontium in the contrast solution as in the case with the testing solution, obtaining the concentration (C.sub.2) (ppm) of strontium in the contrast solution, and calculating the strontium adsorption rate of the metal adsorption acrylic fiber by using the following equation: strontium adsorption rate (%)={(C.sub.2−C.sub.1)/C.sub.2}×100.

A metal adsorption acrylic fiber wherein the strontium adsorption rate is 85% or more when the strontium adsorption rate is measured using the following measurement method. A strontium adsorption rate measurement method (strontium 0.1 ppm measurement method) involves immersing a metal adsorption acrylic fiber into an immersion fluid, collecting the immersion fluid as a testing solution 24 hours after beginning the immersion, analyzing the quantity of strontium in the testing solution, obtaining the concentration (C.sub.1) (ppm) of strontium in the testing solution, creating a contrast solution, analyzing the quantity of strontium in the contrast solution as in the case with the testing solution, obtaining the concentration (C.sub.2) (ppm) of strontium in the contrast solution, and calculating the strontium adsorption rate of the metal adsorption acrylic fiber by using the following equation: strontium adsorption rate (%)={(C.sub.2−C.sub.1)/C.sub.2}×100.

A sound absorbing body comprises a non-woven fabric or a non-woven fabric laminate, the non-woven fabric or the non-woven fabric laminate comprises a fiber that has an average fiber diameter of less than 3,000 nm, the non-woven fabric or the non-woven fabric laminate has a thickness of less than 10 mm, the non-woven fabric or the non-woven fabric laminate has a unit thickness flow resistance of greater than 4.0 E+06 Ns/m.sup.4 and less than 5.0 E+08 Ns/m.sup.4, and the non-woven fabric or the non-woven fabric laminate has a bulk density of greater than 70 kg/m.sup.3 and less than 750 kg/m.sup.3.

A sound absorbing body comprises a non-woven fabric or a non-woven fabric laminate, the non-woven fabric or the non-woven fabric laminate comprises a fiber that has an average fiber diameter of less than 3,000 nm, the non-woven fabric or the non-woven fabric laminate has a thickness of less than 10 mm, the non-woven fabric or the non-woven fabric laminate has a unit thickness flow resistance of greater than 4.0 E+06 Ns/m.sup.4 and less than 5.0 E+08 Ns/m.sup.4, and the non-woven fabric or the non-woven fabric laminate has a bulk density of greater than 70 kg/m.sup.3 and less than 750 kg/m.sup.3.

A circular air entangling system may comprise a bed plate for receiving fiber layers. An air entangling module may entangle the fiber layers with one another and a fiber packaging apparatus may transport the fiber layers for further processing. In this manner, a fiber preform may be constructed.

A circular air entangling system may comprise a bed plate for receiving fiber layers. An air entangling module may entangle the fiber layers with one another and a fiber packaging apparatus may transport the fiber layers for further processing. In this manner, a fiber preform may be constructed.

A nonwoven fabric and a method of making thereof. The nonwoven fabric includes a plurality of randomly-oriented fibers, the plurality of randomly-oriented fibers including: at least 60 wt % of oxidized polyacrylonitrile fibers; and from to less than 40 wt % of reinforcing fibers having an outer surface comprised of a (co)polymer with a melting temperature of from 100° C. to 450° C.; and a fluoropolymer binder on the plurality of randomly-oriented fibers; wherein the plurality of randomly-oriented fibers is bonded together to form the nonwoven fabric, optionally wherein the nonwoven fabric has a thickness of one millimeter or less.