This application relates to a high-strength protective cloth with moisture permeability and a manufacturing method thereof. The method includes: providing a first fiber thread and a second fiber thread; respectively forming a moisture-permeable membrane on a surface of an arrangement layer formed by the first fiber thread and a surface of an arrangement layer formed by the second fiber thread; and combining the first fiber thread and the second fiber thread in pairs by intersecting and laminating to form laminated bonding, where the first fiber thread and the second fiber thread with the moisture-permeable membrane are used as two opposite surface layers of the laminated bonding to allow the laminated bonding to form a corresponding moisture-permeable membrane layer. This application provides a high-level protective cloth with excellent moisture permeability and high-strength protective performance, and optimizes the moisture permeability of the protective cloth.

A method for producing a fibrous web includes: (a) a fibrous ply containing polylactide fibers and, as necessary, other fibers are laid on a substrate in a random fiber arrangement, (b) initially a loose, pre-compressed nonwoven is created by applying a first pressure to the fibrous ply, the tear resistance of which nonwoven permits free bridging of a span between 0.1 m and 1 m before the nonwoven tears, (c) the pre-compressed nonwoven is then passed through the calender gap, wherein a pattern consisting of point or linear pressure zones is formed in the gap, with the fibers in the pressure zones being exposed to a second pressure, which is higher than the first pressure, and to a temperature such that the fibers fuse.

A method for producing a fibrous web includes: (a) a fibrous ply containing polylactide fibers and, as necessary, other fibers are laid on a substrate in a random fiber arrangement, (b) initially a loose, pre-compressed nonwoven is created by applying a first pressure to the fibrous ply, the tear resistance of which nonwoven permits free bridging of a span between 0.1 m and 1 m before the nonwoven tears, (c) the pre-compressed nonwoven is then passed through the calender gap, wherein a pattern consisting of point or linear pressure zones is formed in the gap, with the fibers in the pressure zones being exposed to a second pressure, which is higher than the first pressure, and to a temperature such that the fibers fuse.

In order to provide a copolymerized polyphenylene sulfide fiber that is thin, has a low heat shrinkage rate, and is suitable for a use as a paper-making binder having excellent weldability, a copolymerized polyphenylene sulfide fiber is characterized by containing a copolymerized polyphenylene sulfide that has a p-phenylene sulfide unit as a main component and contains 3 mol % or more and 40 mol % or less of a m-phenylene sulfide unit in a repeating unit, and having a degree of crystallization of 10.0% or more and 30.0% or less, an average fiber diameter of 5 μm or more and 25 μm or less, and further a shrinkage rate in 98° C. hot water of 25.0% or less.

In order to provide a copolymerized polyphenylene sulfide fiber that is thin, has a low heat shrinkage rate, and is suitable for a use as a paper-making binder having excellent weldability, a copolymerized polyphenylene sulfide fiber is characterized by containing a copolymerized polyphenylene sulfide that has a p-phenylene sulfide unit as a main component and contains 3 mol % or more and 40 mol % or less of a m-phenylene sulfide unit in a repeating unit, and having a degree of crystallization of 10.0% or more and 30.0% or less, an average fiber diameter of 5 μm or more and 25 μm or less, and further a shrinkage rate in 98° C. hot water of 25.0% or less.

A synthetic leather has high flame retardance in addition to excellent mechanical strength and durability, which may yield a covered article having an excellent texture, and a covered article which has been covered with the synthetic leather. The covered article includes a synthetic leather and a covered article covered with the synthetic leather, the synthetic leather having a fiber base material layer including a non-woven fabric containing: a non-melting fiber A having a high-temperature shrinkage rate of 3% or less, and a thermal conductivity, conforming to ISO22007-3 (2008), of 0.060 W/m.Math.K or less; and a thermoplastic fiber B having an LOI value, conforming to JIS K 7201-2 (2007), of 25 or more.

A synthetic leather has excellent flame retardance and an article covered with the synthetic. The synthetic leather includes a fiber base material layer formed of a non-woven fabric sheet, wherein the non-woven fabric sheet includes at least one flameproof layer formed of a web including a non-melting fiber A having a high-temperature shrinkage rate of 3% or less and a thermal conductivity, conforming to ISO22007-3 (2008), of 0.060 W/m.Math.K or less and is formed by bonding the flameproof layer to a scrim layer including a carbonized heat-resistant fiber B having an LOI value, conforming to JIS K 7201-2 (2007), of 25 or more, and a resin layer is laminated on a surface of the scrim layer, and a covered article covered with the synthetic leather.

A thermal insulation and fire protection felt product is provided. The felt product includes a first layer including a first plurality of nonwoven mechanically entangled oxidized polyacrylonitrile (PAN) precursor fibers bonded together by a first plurality of melted thermoplastic polyphenylene sulfide (PPS) fibers homogeneously mixed with the first plurality of mechanically entangled PAN precursor fibers. The first plurality of melted thermoplastic PPS fibers form a matrix of bond points between individual fibers of the first plurality of mechanically entangled PAN fibers. A second layer includes a second plurality of nonwoven mechanically entangled oxidized PAN precursor fibers bonded together by a second plurality of melted thermoplastic PPS fibers homogeneously mixed with the second plurality of mechanically entangled PAN precursor fibers. The second plurality of melted thermoplastic PPS fibers form a matrix of bond points between individual fibers of the second plurality of mechanically entangled PAN fibers.

Embodiments described herein relate generally to adhesive alloys and their use in filter media, and in particular to adhesive alloys that can be melt blown onto a filter media layer, and which are thermally activated to bond the filter media layer to another filter media layer. An adhesive alloy is provided. A thermally activated adhesive has a first melting temperature. A polymer has a second melting temperature greater than the first melting temperature. A ratio of the thermally activated adhesive in the adhesive alloy is in a range of 5 wt % to 70 wt %.

Embodiments described herein relate generally to adhesive alloys and their use in filter media, and in particular to adhesive alloys that can be melt blown onto a filter media layer, and which are thermally activated to bond the filter media layer to another filter media layer. An adhesive alloy is provided. A thermally activated adhesive has a first melting temperature. A polymer has a second melting temperature greater than the first melting temperature. A ratio of the thermally activated adhesive in the adhesive alloy is in a range of 5 wt % to 70 wt %.