Preparation method of premixed fiber gradient filter material

Inactive Publication Date: 2021-11-23

ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH

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AI-Extracted Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is how to prevent the phenomenon that the fi...

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Abstract

The invention provides a preparation method of a premixed fiber gradient filter material. The preparation method comprises the following steps of (1) preparation of premixed PPS (polyphenylene sulfide) fiber, namely dehydrating polyphenylene sulfide resin, and then heating and melting; weighing and spinning molten raw materials, enabling the raw materials to enter a channel, pre-mixing fibers with different finenesses in advance in the spinning process, winding, drafting and heat-setting the ejected fibers, and bundling, additionally winding and chopping heat-set PPS fiber filament cylinders to prepare PPS short fibers; and (2) preparing the premixed fiber gradient filter material. The preparation method has the advantages that a spinneret plate is transformed during fiber preparation, so that fibers with different fineness degrees are premixed in advance, the situation of non-uniform mixing in the filter material production process is improved, the CV value of the filter material is reduced, and meanwhile, the filter precision of the filter material is improved.

Application Domain

Synthetic resin layered productsFiltration separation +1

Technology Topic

Phenyl sulfideHeat setting +2

Image

Examples

Experimental program(3)
Comparison scheme(1)
Effect test(1)

Example Embodiment

[0019] Example 1

[0020] 1. Preparation of the PPS fiber premix

[0021] The amount of the polyphenylene sulfide resin is dehydrated at a temperature of 100-110 ℃ 12h, water content to 0.02%, and then melted by heating at 200-400 deg.] C again; to meter the molten raw material, spinning, and then enter the corridor, wherein transformation of the spinneret, on the basis of the original trace of the same diameter, the wire diameter different settings, so that the ejection fibers having different fineness, the present embodiment using a configuration of the spinneret spinning: inner wire diameter of 0.9D, the outer wire diameter 1.5D, the inner and outer wire diameter annular wire diameter and distribution ratio of 1: 1. Where D is the thickness of the fiber unit under moisture regain, weight in grams of 9000 meters of fiber length, denier referred denier (D), such as 9000 meters of fiber weight of 1 g of 1 denier, fiber density is constant when , the greater the denier, the coarser fibers.

[0022] Different wire diameter of spinneret discharge molten polyphenylene sulfide material, is the fiber filaments discharged, since the spinning nozzle is provided spinneret inner small wire diameter, the outer large wire diameter, and was annularly distributed at a ratio of 1: 1, the fiber was discharged fibers are uniformly mixing two different diameters.

[0023] Then the fiber is wound discharge, drawn, heat set. The good heat setting cylinder PPS filaments are bundled, the volume increase, chopped, PPS made into staple fibers, the number of short fibers curl control is about 13 / 25cm, a length of about 65mm. PPS fiber obtained 50% 1.0dtex + 50% 1.5dtex of. dtex: Under moisture regain, length weight in grams of 1000 m of yarn. Turks, the more coarse yarn. Turks are in metric units.

[0024] D × 1.111 = dtex

[0025] 2. Preparation of the premixed fibers gradient filter

[0026] Preparation of (1) premixing layer: The premix PPS fibers (50% 1.0dtex + 50% 1.5dtex) after opening carded web laid to form a premix layer, weight 245g / m2 airlaid through;

[0027] (2) Preparation of the support layer: The PTFE fabric, a grammage of 110g / m2;

[0028] Preparation of (3) Common layer: ordinary PPS (2.2dtex) after opening carded fiber laying, the dust layer is formed by way of welcome airlaid, weight 245g / m2;

[0029] (4) mechanical manner premix laid layer, support layer, layer three general by pre thorn, a needle, puncture needle 2 collusion entangled together, to prepare 600g premix gradient filter.

Example Embodiment

[0030] Example 2

[0031] 1. Preparation of the PPS fiber premix

[0032] The amount of the polyphenylene sulfide resin is dehydrated at a temperature of 100-110 ℃ 12h, water content to 0.02%, and then melted by heating at 200-400 deg.] C again; to meter the molten raw material, spinning, and then enter the corridor, wherein transformation of the spinneret, on the basis of the original trace of the same diameter, the wire diameter different settings, so that the ejection fibers having different fineness, the present embodiment using a configuration of the spinneret spinning: inner wire diameter of 0.9D, the outer wire diameter 1.5D, the inner and outer wire diameter annular wire diameter and distribution ratio of 1: 1. Different wire diameter of spinneret discharge molten polyphenylene sulfide material, is the fiber filaments discharged, since the spinning nozzle is provided spinneret inner small wire diameter, the outer large wire diameter, and was annularly distributed at a ratio of 1: 1, the fiber was discharged fibers are uniformly mixing two different diameters.

[0033] Then the fiber is wound discharge, drawn, heat set. The good heat setting cylinder PPS filaments are bundled, the volume increase, chopped, PPS made into staple fibers, the number of short fibers curl control is about 13 / 25cm, a length of about 65mm. PPS fiber obtained 50% 1.0dtex + 50% 1.5dtex of.

[0034] 2. Preparation of the premixed fibers gradient filter

[0035] Preparation of (1) premixing layer: The premix PPS fibers (50% 1.0dtex + 50% 1.5dtex) after opening carded web laid to form a premix layer, weight 220g / m2 airlaid through;

[0036] (2) Preparation of the support layer: The PTFE fabric, a grammage of 110g / m2;

[0037] Preparation of (3) Common layer: ordinary PPS (2.2dtex) after opening carded fiber laying, the dust layer is formed by way of welcome airlaid, weight 220g / m2;

[0038] (4) mechanical manner premix laid layer, support layer, layer three general by pre thorn, a needle, puncture needle 2 collusion entangled together, to prepare 550g premix gradient filter;

Example Embodiment

[0039] Example 3

[0040] 1. Preparation of the PPS fiber premix

[0041] The amount of the polyphenylene sulfide resin is dehydrated at a temperature of 100-110 ℃ 12h, water content to 0.02%, and then melted by heating at 200-400 deg.] C again; to meter the molten raw material, spinning, and then enter the corridor, wherein transformation of the spinneret, on the basis of the original trace of the same diameter, the wire diameter different settings, so that the ejection fibers having different fineness, the present embodiment using a configuration of the spinneret spinning: inner wire diameter of 0.9D, the outer wire diameter 1.5D, the inner and outer wire diameter annular wire diameter and distribution ratio of 1: 1. Different wire diameter of spinneret discharge molten polyphenylene sulfide material, is the fiber filaments discharged, since the spinning nozzle is provided spinneret inner small wire diameter, the outer large wire diameter, and was annularly distributed at a ratio of 1: 1, the fiber was discharged fibers are uniformly mixing two different diameters.

[0042] Then the fiber is wound discharge, drawn, heat set. The good heat setting cylinder PPS filaments are bundled, the volume increase, chopped, PPS made into staple fibers, the number of short fibers curl control is about 13 / 25cm, a length of about 65mm. PPS fiber obtained 50% 1.0dtex + 50% 1.5dtex of.

[0043] 2. Preparation of the premixed fibers gradient filter

[0044] Preparation of (1) premixing layer: The premix PPS fibers (50% 1.0dtex + 50% 2.0dtex) with a normal weight PPS fibers: carding after laying an opening, by way of a pre-formed airlaid mixed-layer, weight 245g / m2;

[0045] (2) Preparation of the support layer: The PTFE fabric, a grammage of 110g / m2;

[0046](3) Preparation of ordinary layers: After opening the ordinary PPS (2.2dtex) fiber, the wrapping net is formed, and the dust collecting layer is formed through the airflow network, gravity 245 g / m2;

[0047] (4) Three layers of premixing layers, support layers, and ordinary layers are used to use mechanical networking, and acupuncture 1, acupuncture 2 thorn together, to make 600 g of premix gradient filter material;

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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