Filtering material of thermal stability and the purpose thereof

Abstract

The present invention discloses one kind of heat resistant filter material and its use. The heat resistant filter material consists of one base material layer and one combined filter layers, the base material layer is made of inorganic fiber and / or heat resistant organic fiber, and at least one filter layer contains both inorganic fiber and heat resistant organic fiber, with the diameter of the inorganic fiber being smaller than that of the heat resistant organic fiber. The heat resistant filter material is used in filter. It has excellent complexing performance between the inorganic fiber and the heat resistant organic fiber, high dust collecting efficiency, high dust impact resistance, high antiwear performance, high heat shrinkage tolerance, etc.

Description

Technical field:

[0001] The invention relates to a filter material. Background technique:

[0002] Conventionally, high-temperature filter materials for air purification include heat-resistant filter materials for internal filtration and heat-resistant filter materials for surface filtration. For dust collectors, heat-resistant filter materials for surface filtration are mainly used. The so-called surface filtration means that the heat-resistant filter material uses the filter surface to capture dust, and then forms a dust cake layer on the surface of the filter material. The formed cake layer continues to collect and filter the dust. When the dust cake layer is formed to a certain thickness, it is removed by pulse or vibration, and then continues to form a dust layer on the surface of the heat-resistant filter material, and then removes the dust layer. , so that the cycle operation works to filter and capture the dust.

[0003] Filter material for surface filtration, on ...

Examples

Embodiment 1

[0093] First, select PPS staple fibers with a fineness of 2.2dtex (diameter of 14.5μm), a length of 51mm, and a number of crimps of 12.3 / 25mm ("Tekang" brand produced by Toray Co., Ltd. of Japan), and first spun into 7s / 1, 20s / 1 single yarn, and then 20s / 1 single yarn is spun into 20s / 2 strands (total denier: 600dtex). Among them, 20s / 2 strands are used as warp yarns, 7s / 1 single yarns are used as weft yarns, and the PPS substrate fabric with a warp density of 28 threads / 2.54cm and a weft density of 18 threads / 2.54cm is woven by plain weaving. The air permeability of the substrate fabric is tested according to the 8.27.1A method of the JIS L 1096 standard at a pressure of 50Pa, and the value is 1400L / dm 2 .min.

[0094]Then, select 50% of PPS staple fibers ("Tekang" brand produced by Toray Co., Ltd. of Japan) with a fineness of 2.2dtex (diameter is 14.5 μm), a length of 51mm, and a crimp number of 12.3 / 25mm, a length of 50mm, and a fineness of 0.75dtex (fiber diameter 6μm) ...

Embodiment 2

[0098] First, select at least one of polysulfone fiber (or polytetrafluoroethylene fiber, polyimide fiber, meta-aramid fiber, para-aramid fiber) and / or glass fiber, basalt fiber, At least one of the carbon fibers, and the inorganic fibers have at least a crimp of 1.0 pieces / 25mm or more) to make the base fabric. The air permeability of the substrate fabric is tested according to the 8.27.1A method of the JIS L1096 standard at a pressure of 50Pa, and the value is 700-2000L / dm 2 .min.

[0099] Then, select PPS staple fibers (or polytetrafluoroethylene fibers, polyimide fibers, meta-aramid fibers, para- At least one of aramid fibers) 30% (or 70%), 55% (or 25%) of uncrimped glass fibers with a length of 50 mm and a fineness of 0.75 dtex (fiber diameter 6 μm), a length of 25.4 mm, and a fineness of 2.3dtex (fiber diameter 10μm), glass fiber (or basalt fiber, carbon fiber) 15% (or 5%) with a crimp of 1 to 5 pieces / 25mm, processed by opening and carding, and then the needling densi...

Technical field:

[0001] The invention relates to a filter material. Background technique:

[0002] Conventionally, high-temperature filter materials for air purification include heat-resistant filter materials for internal filtration and heat-resistant filter materials for surface filtration. For dust collectors, heat-resistant filter materials for surface filtration are mainly used. The so-called surface filtration means that the heat-resistant filter material uses the filter surface to capture dust, and then forms a dust cake layer on the surface of the filter material. The formed cake layer continues to collect and filter the dust. When the dust cake layer is formed to a certain thickness, it is removed by pulse or vibration, and then continues to form a dust layer on the surface of the heat-resistant filter material, and then removes the dust layer. , so that the cycle operation works to filter and capture the dust.

[0003] Filter material for surface filtration, on ...

Examples

Embodiment 1

[0093] First, select PPS staple fibers with a fineness of 2.2dtex (diameter of 14.5μm), a length of 51mm, and a number of crimps of 12.3 / 25mm ("Tekang" brand produced by Toray Co., Ltd. of Japan), and first spun into 7s / 1, 20s / 1 single yarn, and then 20s / 1 single yarn is spun into 20s / 2 strands (total denier: 600dtex). Among them, 20s / 2 strands are used as warp yarns, 7s / 1 single yarns are used as weft yarns, and the PPS substrate fabric with a warp density of 28 threads / 2.54cm and a weft density of 18 threads / 2.54cm is woven by plain weaving. The air permeability of the substrate fabric is tested according to the 8.27.1A method of the JIS L 1096 standard at a pressure of 50Pa, and the value is 1400L / dm 2 .min.

[0094]Then, select 50% of PPS staple fibers ("Tekang" brand produced by Toray Co., Ltd. of Japan) with a fineness of 2.2dtex (diameter is 14.5 μm), a length of 51mm, and a crimp number of 12.3 / 25mm, a length of 50mm, and a fineness of 0.75dtex (fiber diameter 6μm) ...

Embodiment 2

[0098] First, select at least one of polysulfone fiber (or polytetrafluoroethylene fiber, polyimide fiber, meta-aramid fiber, para-aramid fiber) and / or glass fiber, basalt fiber, At least one of the carbon fibers, and the inorganic fibers have at least a crimp of 1.0 pieces / 25mm or more) to make the base fabric. The air permeability of the substrate fabric is tested according to the 8.27.1A method of the JIS L1096 standard at a pressure of 50Pa, and the value is 700-2000L / dm 2 .min.

[0099] Then, select PPS staple fibers (or polytetrafluoroethylene fibers, polyimide fibers, meta-aramid fibers, para- At least one of aramid fibers) 30% (or 70%), 55% (or 25%) of uncrimped glass fibers with a length of 50 mm and a fineness of 0.75 dtex (fiber diameter 6 μm), a length of 25.4 mm, and a fineness of 2.3dtex (fiber diameter 10μm), glass fiber (or basalt fiber, carbon fiber) 15% (or 5%) with a crimp of 1 to 5 pieces / 25mm, processed by opening and carding, and then the needling densi...

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