CN114950007B - Novel fuel composite filtering material and preparation method thereof - Google Patents

Novel fuel composite filtering material and preparation method thereof Download PDF

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Publication number
CN114950007B
CN114950007B CN202210391691.7A CN202210391691A CN114950007B CN 114950007 B CN114950007 B CN 114950007B CN 202210391691 A CN202210391691 A CN 202210391691A CN 114950007 B CN114950007 B CN 114950007B
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fiber
layer
parts
fully synthetic
dispersed
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CN114950007A (en
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宋佃凤
葛龙
徐汝义
李亚丽
翟明双
孟凯
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Shandong Renfeng Speical Materials Co ltd
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Shandong Renfeng Speical Materials Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0681—The layers being joined by gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

The invention relates to the technical field of fuel composite filter materials, in particular to a novel fuel composite filter material and a preparation method thereof. The novel fuel composite filtering material comprises the following components in sequence of an oil inlet surface and an oil outlet surface: the device comprises a fully synthetic fiber prefilter layer, a high-precision glass fiber layer and a fully synthetic fiber hydrophobic layer; the fully synthetic fiber prefilter layer comprises: 1.67D polyester fiber, 0.6D polyester fiber and sheath-core structure bicomponent polyester fiber; the fine layer of high accuracy glass includes: glass fiber with the diameter of 1-5 μm, glass wool with the diameter less than 1 μm, and glass fiber with the diameter of 8-10 μm; the fully synthetic fiber hydrophobic layer comprises: 1.67D polyester fiber, 0.6D polyester fiber, 0.3D polyester fiber, sheath-core structure bicomponent polyester fiber and 1-5 mu m glass fiber. The invention provides a novel fuel composite filter material which meets the use requirements of the novel fuel composite filter material of national VI standard; the invention also provides a preparation method of the composition.

Description

Novel fuel composite filtering material and preparation method thereof
Technical Field
The invention relates to the technical field of fuel composite filter materials, in particular to a novel fuel composite filter material and a preparation method thereof.
Background
The fuel oil filter paper is a key material of the fuel oil filter; the traditional fuel fine filtration adopts a structure of wood pulp fiber base paper, a melt-blown material intermediate layer and a single-side protective layer, the fuel filtration can meet the national V emission requirement, an internal combustion engine is used as the main power of road traffic and national defense equipment in the world at present, the low carbonization of the required fuel becomes a development trend, water molecules in diesel oil are continuously reduced, and small molecular water with the diameter of water drops below 10 mu m exists in the diesel oil. The oil-water separation technology of the traditional filtration separation is difficult to remove.
CN202110367090.8 discloses a preparation method of a high-efficiency low-resistance fully synthetic fiber air filter material, which comprises the steps of firstly dispersing 1.5D polyester fibers and 0.6D polyester fibers; adding glass fiber for dispersion, then adding 0.3D polyester fiber for dispersion, and finally adding skin-core structure bi-component polyester fiber for dispersion; then single-layer pulp distribution is carried out, and the raw paper is integrally manufactured and formed to obtain raw paper pages; drying the base paper page; gluing by using acrylic resin glue; and (5) drying and curling. The prepared air filtering material has long service life, is suitable for the precision requirement of any road condition, simultaneously avoids the problem that the traditional wood pulp paper has poor moisture resistance and is easy to deform, and has the advantages of low resistance and high efficiency.
CN201910156242.2 discloses a preparation process of a glass fiber F9-grade air filter material, which comprises the steps of mixing 10-12um glass fiber, 5-8um glass fiber and 10-18% of superfine fiber to prepare slurry, making paper by a wet method to prepare a filter material, drying, coating acrylic resin liquid on two sides of the dried filter material, and continuously drying to obtain the F9-grade air filter material which has high efficiency and high moisture resistance, can effectively cope with haze weather, and is used for preparing filter paper for filtering air by using glass fiber.
CN201510973258.4 discloses a preparation method of seedling paper, which discloses a preparation process of mixing pulping, net-surfing molding, pre-baking, applying light glue on the surface, drying and shaping, slitting and winding, beating to make the fiber surface broomed, matching with wood pulp and a dispersion reinforcing agent, and making process adjustment aiming at improving strength during the papermaking of wood pulp fibers to make the paper have enough strength to net-surfing molding; and finally, surface sizing is carried out, so that the prepared seedling raising paper cup has enough use strength in the seedling raising stage.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a novel fuel composite filtering material which has excellent performance, can coalesce and re-separate small molecular water drops, meets the use requirements of the novel fuel composite filtering material of national VI standard, meets the filtering effect of removing large-particle impurities and large-particle-size water drops, and can adsorb and filter the small water drops and increase the passing rate of an oil liquid layer; the invention also provides a preparation method of the composition.
The novel fuel composite filtering material sequentially comprises the following components in sequence from an oil inlet surface to an oil outlet surface: the device comprises a fully synthetic fiber prefilter layer, a high-precision glass fiber layer and a fully synthetic fiber hydrophobic layer;
the fully synthetic fiber prefilter layer is prepared from the following raw materials in parts by weight: 47-52 parts of 1.67D polyester fiber, 19-24 parts of 0.6D polyester fiber and 15-19 parts of sheath-core structure bicomponent polyester fiber;
the high-precision glass fiber layer is prepared from the following raw materials in parts by mass: 36-41 parts of glass fiber with the diameter of 1-5 mu m, 28-33 parts of glass wool with the diameter less than 1 mu m and 22-26 parts of glass fiber with the diameter of 8-10 mu m;
the fully synthetic fiber hydrophobic layer is prepared from the following raw materials in parts by mass: 10-12 parts of 1.67D polyester fiber, 32-35 parts of 0.6D polyester fiber, 15-18 parts of 0.3D polyester fiber, 12-15 parts of sheath-core structure bicomponent polyester fiber and 2-4 parts of 1-5 mu m glass fiber with the beating degree of more than 50 DEG SR.
The manufacturing processes of the fully synthetic fiber prefilter layer, the high-precision glass fiber layer and the fully synthetic fiber hydrophobic layer are as follows:
(1) Pulping: dispersing raw materials in sequence, and allowing the dispersed raw materials to pass through a high-frequency fluffer without cutter alignment and enter a slurry preparation tank for slurry preparation;
(2) And (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
(3) Gluing: adopting an acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 45-55 ℃;
(4) And (3) drying again: the temperature is 105-120 ℃.
The raw material dispersion sequence and dispersion time of the fully synthetic fiber prefilter layer are as follows: firstly, 1.67D polyester fiber and 0.6D polyester fiber are mixed and dispersed for 6-8min, then the skin-core structure bicomponent polyester fiber is dispersed for 2-3min, the dispersing water is 100% clear water, the mass concentration of the dispersed fiber is 8-10%, and a dispersing agent with the mass of the fiber of 0.3-0.5 per mill is added into the prepared pulp.
Adding organic silicon waterproofing agent into the fully synthetic fiber prefilter layer during gluing, wherein the adding mass is 0.4-0.5% of that of acrylic resin glue, and the basis weight of the paper is 45-50g/m 2 Air permeability of 650-750L/m 2 /s。
The raw material dispersion sequence and the dispersion time of the high-precision glass fiber layer are as follows: dispersing the raw materials for 10-12min with water of 60% clear water and 40% pure water, and the mass concentration of the dispersed fiber is 0.8-1%.
The quantitative paper of the glue coated high-precision glass fiber layer is 60-70g/m 2 Air permeability of 200-280L/m 2 /s。
The material dispersion sequence and the dispersion time of the completely-synthetic fiber hydrophobic layer are as follows: firstly, 1.67D polyester fiber and 0.6D polyester fiber are mixed and dispersed for 6-8min, then the skin-core structure bicomponent polyester fiber is dispersed for 1-2min, the 0.3D polyester fiber is continuously dispersed for 2-3min, finally the glass fiber with the beating degree of more than 50 DEG SR and the diameter of 1-5 mu m is dispersed for 2-3min, the dispersion water is 80% clear water and 20% pure water, and the mass concentration of the dispersed fiber is 6-8%; and adding dispersant with the fiber mass of 0.3-0.5 per mill.
Coating the hydrophobic layer of the fully synthetic fiber with adhesive, adding organosilicon waterproofing agent with the mass accounting for 10.5-12.5% of the acrylic resin adhesive, and making the paper quantitative of 85-95g/m 2 Air permeability of 330-380L/m 2 /s。
The dispersant is polyacrylamide, and the molecular weight is 1800-2000 ten thousand.
The preparation process of the novel fuel composite filtering material comprises the following steps: bonding the fully synthetic fiber prefilter layer, the high-precision glass fiber layer and the fully synthetic fiber hydrophobic layer according to the sequence of oil inlet surface and oil outlet surface, and bonding the middle of the layer structure by spraying modified polyester fiber glue yarns with the melting point of 185-220 ℃; the glue spraying amount of the layer is controlled to be 7-10g/m 2 。
Specifically, the preparation process of the novel fuel composite filter material comprises the following steps:
(1) Preparing a fully synthetic fiber prefilter layer, mixing 47-52 parts of 1.67D polyester fiber and 19-24 parts of 0.6D polyester fiber for dispersing for 6-8min, dispersing 15-19 parts of skin-core structure bicomponent polyester fiber for 2-3min, wherein the dispersion water is 100% clear water, the mass concentration of the dispersed fiber is 8-10%, the dispersed fiber enters a pulp preparing tank for pulp preparation through a high-frequency defibrator without a cutter, and a dispersant polyacrylamide with the mass of 0.3-0.5 per mill of the fiber is added into the pulp preparation;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting an acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 45-55 ℃; adding organic silicon waterproofing agent into the glue, wherein the adding amount is 0.4-0.5% of that of acrylic resin glue, and the paper ration is 45-50g/m 2 Air permeability of 650-750L/m 2 /s；
And (3) drying again: the temperature is 105-120 ℃;
(2) Preparing a high-precision glass fiber layer, and simultaneously dispersing 36-41 parts of glass fiber with the diameter of 1-5 mu m, 28-33 parts of glass wool with the diameter less than 1 mu m and 22-26 parts of glass fiber with the diameter of 8-10 mu m for 10-12min, wherein the dispersing water is 60% of clear water and 40% of pure water, and the mass concentration of the dispersed fiber is 0.8-1%; after dispersion, the pulp enters a pulp mixing tank for pulp mixing through a high-frequency fluffer without cutter alignment;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 45-55 ℃; the paper weight is 60-70g/m 2 Air permeability of 200-280L/m 2 /s；
And (3) drying again: the temperature is 105-120 ℃;
(3) Preparing a fully synthetic fiber hydrophobic layer, mixing and dispersing 10-12 parts of 1.67D polyester fiber and 32-35 parts of 0.6D polyester fiber for 6-8min, then dispersing 12-15 parts of skin-core structure bicomponent polyester fiber for 1-2min, continuously dispersing 15-18 parts of 0.3D polyester fiber for 2-3min, finally dispersing 2-4 parts of 1-5 mu m glass fiber with the beating degree of more than 50 DEG SR for 2-3min, wherein the dispersing water is 80% clear water and 20% pure water, the dispersed fiber mass concentration is 6-8% and then passes through a high-frequency fluffer without a cutter, enters a pulp preparation tank for pulp preparation, and a dispersing agent with the fiber mass of 0.3-0.5 per thousand is added;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 45-55 ℃; adding organosilicon waterproofing agent with the mass accounting for 10.5-12.5% of the acrylic resin adhesive and the basis weight of the paper being 85-95g/m 2 Air permeability of 330-380L/m 2 /s；
And (3) drying again: the temperature is 105-120 ℃;
(4) Bonding the prepared fully synthetic fiber prefilter layer, the high-precision glass fiber layer and the fully synthetic fiber hydrophobic layer according to the sequence of an oil inlet surface and an oil outlet surface, and bonding the middle of the layer structure by spraying modified polyester fiber adhesive yarns with the melting point of 185-220 ℃; the glue spraying amount of the layer is controlled to be 7-10g/m 2 。
The novel fuel composite filter material is prepared by adopting three layers of a fully synthetic fiber prefilter layer, a high-precision glass fiber layer and a fully synthetic fiber hydrophobic layer in sequence through a modified polyester hot melt adhesive compounding technology, wherein the three layers are compounded into a gradient filter layer with different structures, two layers of fully synthetic fiber layers with different precisions and different waterproofness and one layer of pure glass fiber filter layer; filtering large particle impurities and large particle size water; the high-precision glass fiber layer filters impurities with small particle size, and enables small water drops to pass through and coalesce into large water drops; the fully synthetic fiber hydrophobic layer filters the gathered large water drops and allows oil to pass through, and the fully synthetic fiber prefiltering layer and the fully synthetic fiber hydrophobic layer are coated on the surface by adding bicomponent fibers, so that the strength of the fully synthetic fiber material is ensured; the high-permeability fully-synthetic fiber prefilter layer on the outermost layer is an oil inlet surface, and large-particle impurities and large-particle water drops are intercepted; the middle layer is a high-precision glass fiber layer, the middle layer contains a large number of superfine fibers (less than 8 mu m) and nano-scale fibers, the high-precision glass fiber layer quickly passes through the filter layer due to different oil liquids with different surface tensions, the water passing speed is slow, the tiny water drops are adsorbed on the surface of the filter layer, and the tiny water drops are coalesced into large-particle water drops; the last layer is a fully synthetic fiber hydrophobic layer, large-particle water drops gathered in the fuel oil are blocked outside the layer, the large-particle water drops are filtered, separated and removed, and the filtered oil is discharged after passing through the layer.
Compared with the prior art, the invention has the beneficial effects that:
(1) The novel fuel composite filtering material of the invention adopts the full synthetic fiber mixing, papermaking and integral forming technology, thereby not only ensuring the economic use requirement of long service life, but also ensuring the application of the precision and water separation requirement of any oil product;
(2) The novel fuel composite filtering material avoids the problem that the traditional wood pulp paper has poor moisture resistance and is easy to deform, thereby truly realizing the filtering material which has long service life, high precision and low resistance and high efficiency;
(3) According to the novel fuel composite filtering material, the high-precision glass fiber layer is manufactured by the wet-process integrated forming technology, so that the coalescence of small-particle-size water drops in different oil products is realized.
Detailed Description
The present invention is further illustrated by the following examples.
Example 1
The preparation process of the novel fuel composite filtering material comprises the following steps:
(1) Preparing a fully synthetic fiber prefilter layer, mixing and dispersing 49 parts of 1.67D polyester fiber and 22 parts of 0.6D polyester fiber for 8min, dispersing 18 parts of skin-core structure bicomponent polyester fiber for 2min, wherein the dispersing water is 100% clear water, the mass concentration of the dispersed fiber is 10%, after dispersion, the fiber enters a pulp mixing tank for pulp mixing through a high-frequency fluffer without cutter alignment, and a dispersing agent with the mass of 0.5 per mill of the fiber is added into the pulp mixing tank;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 50 ℃; adding organic silicon waterproofing agent into the glue, wherein the adding mass is 0.5 percent of that of the acrylic resin glue, and the basis weight of the paper is 50g/m 2 Air permeability of 700L/m 2 /s；
And (3) drying again: the temperature is 110 ℃;
(2) Preparing a high-precision glass fiber layer, simultaneously dispersing 40 parts of glass fiber with the diameter of 1-5 mu m, 33 parts of glass wool with the diameter less than 1 mu m and 25 parts of glass fiber with the diameter of 8-10 mu m for 12min, wherein the water for dispersion is 60% of clear water and 40% of pure water, and the mass concentration of the dispersed fiber is 1%; after dispersion, the pulp enters a pulp mixing tank for pulp mixing through a high-frequency fluffer without cutter alignment;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 50 ℃; basis weight of paper 60g/m 2 Air permeability of 200L/m 2 /s；
And (3) drying again: the temperature is 110 ℃;
(3) Preparing a fully-synthetic fiber hydrophobic layer, firstly mixing and dispersing 12 parts of 1.67D polyester fiber and 35 parts of 0.6D polyester fiber for 8min, then dispersing 15 parts of bicomponent polyester fiber with a sheath-core structure for 1min, continuously dispersing 18 parts of 0.3D polyester fiber for 2min, finally dispersing 2 parts of glass fiber with the beating degree of 1-5 microns above 50 DEG SR for 2min, dispersing water which is 80% clear water and 20% pure water, dispersing the dispersed fiber with the mass concentration of 8% and then passing through a high-frequency fluffer without a cutter, feeding the dispersed fiber into a pulp preparation tank for pulp preparation, and adding a dispersing agent with the mass of 0.5 per thousand of the fiber;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 50 ℃; adding organosilicon waterproofing agent with the mass accounting for 12.5 percent of the acrylic resin adhesive and the basis weight of the paper being 90g/m 2 Air permeability of 360L/m 2 /s；
And (3) drying again: the temperature is 110 ℃;
(4) Bonding the prepared fully synthetic fiber prefilter layer, the high-precision glass fiber layer and the fully synthetic fiber hydrophobic layer according to the sequence of an oil inlet surface and an oil outlet surface, and bonding the middle of the layer structure by spraying modified polyester fiber glue yarns with the melting point of 190 ℃; the glue spraying amount of the layer is controlled to be 9g/m 2 。
Example 2
The preparation process of the novel fuel composite filtering material comprises the following steps:
(1) Preparing a fully synthetic fiber prefilter layer, mixing 47 parts of 1.67D polyester fibers and 24 parts of 0.6D polyester fibers for dispersion for 7min, dispersing 15 parts of bicomponent polyester fibers with a sheath-core structure for 3min, wherein the water for dispersion is 100% clear water, the mass concentration of the dispersed fibers is 9%, the dispersed fibers pass through a high-frequency fluffer without cutter pair after dispersion and enter a pulp preparation tank for pulp preparation, and a dispersant polyacrylamide with the mass of 0.4 per mill of the fibers is added into the pulp preparation;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 55 ℃; adding organic silicon waterproof agent into the glue, wherein the added mass is 0.4 percent of that of the acrylic resin glue, and the basis weight of the paper is 45g/m 2 Air permeability of 650L/m 2 /s；
And (3) drying again: the temperature is 110 ℃;
(2) Preparing a high-precision glass fiber layer, and simultaneously dispersing 36 parts of glass fiber with the diameter of 1-5 mu m, 33 parts of glass wool with the diameter less than 1 mu m and 22 parts of glass fiber with the diameter of 8-10 mu m for 10min, wherein the water for dispersion is 60% of clear water and 40% of pure water, and the mass concentration of the dispersed fiber is 0.8%; after dispersion, the pulp enters a pulp mixing tank for pulp mixing through a high-frequency fluffer without cutter alignment;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 55 ℃; basis weight of paper 65g/m 2 Air permeability of 250L/m 2 /s；
And (3) drying again: the temperature is 120 ℃;
(3) Preparing a fully-synthetic fiber hydrophobic layer, mixing and dispersing 11 parts of 1.67D polyester fiber and 32 parts of 0.6D polyester fiber for 6min, dispersing 14 parts of bicomponent polyester fiber with a sheath-core structure for 2min, continuously dispersing 16 parts of 0.3D polyester fiber for 2min, finally dispersing 3 parts of glass fiber with the beating degree of 1-5 microns above 50 DEG SR for 3min, dispersing water which is 80% clear water and 20% pure water, dispersing the dispersed fiber with the mass concentration of 6%, passing through a high-frequency fluffer without a cutter, entering a pulp preparation tank for pulp preparation, and adding a dispersing agent with the mass of 0.4 per thousand of the fiber;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 55 ℃; adding 11% of organosilicon waterproofing agent by mass of acrylic resin adhesive, and the basis weight of the paper is 85g/m 2 Air permeability of 380L/m 2 /s；
And (3) drying again: the temperature is 110 ℃;
(4) Bonding the prepared fully synthetic fiber prefilter layer, the high-precision glass fiber layer and the fully synthetic fiber hydrophobic layer according to the sequence of an oil inlet surface and an oil outlet surface, and bonding the middle of the layer structure by spraying modified polyester fiber glue yarns with the melting point of 200 ℃; the glue spraying amount of the layer is controlled to be 7g/m 2 。
Example 3
The preparation process of the novel fuel composite filtering material comprises the following steps:
(1) Preparing a fully synthetic fiber prefilter layer, mixing and dispersing 52 parts of 1.67D polyester fiber and 19 parts of 0.6D polyester fiber for 6min, dispersing 15 parts of skin-core structure bicomponent polyester fiber for 3min, wherein the dispersing water is 100% clear water, the mass concentration of the dispersed fiber is 8%, after dispersion, the fiber enters a pulp preparation tank for pulp preparation through a high-frequency fluffer without cutter alignment, and adding 0.3% o of dispersant polyacrylamide in the mass of the fiber into the pulp preparation tank;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 45 ℃; adding organic silicon waterproofing agent into the glue, wherein the adding mass is 0.4 percent of that of the acrylic resin glue, and the basis weight of the paper is 45g/m 2 Air permeability of 750L/m 2 /s；
And (3) drying again: the temperature is 110 ℃;
(2) Preparing a high-precision glass fiber layer, and simultaneously dispersing 41 parts of glass fiber with the diameter of 1-5 mu m, 28 parts of glass wool with the diameter less than 1 mu m and 24 parts of glass fiber with the diameter of 8-10 mu m for 12min, wherein the water for dispersion is 60% of clear water and 40% of pure water, and the mass concentration of the dispersed fiber is 1%; after dispersion, the pulp enters a pulp mixing tank for pulp mixing through a high-frequency fluffer without cutter alignment;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 4 ℃; basis weight of paper 70g/m 2 Air permeability of 250L/m 2 /s；
And (3) drying again: the temperature is 110 ℃;
(3) Preparing a fully synthetic fiber hydrophobic layer, mixing and dispersing 10 parts of 1.67D polyester fiber and 32 parts of 0.6D polyester fiber for 7min, then dispersing 13 parts of skin-core structure bicomponent polyester fiber for 2min, continuously dispersing 18 parts of 0.3D polyester fiber for 2min, finally dispersing 3 parts of 1-5 mu m glass fiber with beating degree of more than 50 DEG SR for 2min, dispersing water which is 80% clear water and 20% pure water, dispersing the dispersed fiber with mass concentration of 7%, passing through a high-frequency fluffer without cutter, entering a pulp preparation tank for pulp preparation, and adding a dispersing agent with mass of 0.5 per mill of the fiber;
and (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 45 ℃; adding organosilicon waterproofing agent with the mass accounting for 12 percent of the acrylic resin adhesive and the basis weight of the paper being 95g/m 2 Air permeability of 380L/m 2 /s；
And (3) drying again: the temperature is 110 ℃;
(4) Bonding the prepared fully synthetic fiber prefilter layer, the high-precision glass fiber layer and the fully synthetic fiber hydrophobic layer according to the sequence of an oil inlet surface and an oil outlet surface, and bonding the middle of the layer structure by spraying modified polyester fiber glue yarns with the melting point of 190 ℃; the glue spraying amount of the layer is controlled to be 8g/m 2 。
Comparative example 1
The preparation process of the composite filter material is the same as that in the embodiment 1, and is different in that the prepared three layers in the step (4) are bonded in the sequence of the fully synthetic fiber hydrophobic layer, the high-precision glass fiber layer and the fully synthetic fiber prefilter layer from the oil inlet surface to the oil outlet surface.
Comparative example 2
A preparation process of the composite filter material is the same as that in the embodiment 1, the middle high-precision glass fiber layer is removed, oil is fed from the fully synthetic fiber prefiltering end, and the fully synthetic fiber hydrophobic layer is arranged on the oil outlet surface.
Comparative example 3
A preparation process of a composite filter material comprises the same steps as in example 1, wherein a fully synthetic fiber prefilter layer is removed, a high-precision glass fiber layer is arranged on an oil inlet surface, and a fully synthetic fiber hydrophobic layer is arranged on an oil outlet surface.
The filter materials prepared in examples 1 to 3 and comparative examples 1 to 3 were tested for their properties according to the ISO19438 standard on a single sheet of material with the test parameters 4 μm filtration efficiency, initial resistance, under the following experimental conditions: the test flow rate is 0.71L/min, the ash adding flow rate is 0.25L/min, the BUGL is 100mg/L, and the final pressure difference is 80kPa.
Testing the oil-water separation capacity according to ISO 16332;
from the above test results, as shown in table 1:
TABLE 1 results of index test of filtered materials prepared in examples 1 to 3 and comparative examples 1 to 3
Figure BDA0003595857170000081
As can be seen from the table, the novel fuel composite filter material prepared by the preparation process can achieve the filtering efficiency of more than 99 percent with the filtering efficiency of 4 mu m; the oil-water separation efficiency is more than 95 percent; the service life of the filter can reach 5-10 ten thousand Km; meets the national VI discharge standard and has long service life. As can be seen from comparative example 1, although the three-layer structure is prepared according to the preparation method of the invention, the sequence of the oil inlet surface and the oil outlet surface is changed, although the oil inlet surface filters large-particle water molecules outside due to hydrophobic property, the precision is too high, gradient filtration is not formed, and when a filter paper is tested, the resistance rises too fast, the test time is shortened, and great influence is caused on the service life; it can be seen from comparative example 2 that, without the three-layer filter material of the present invention, although the oil inlet surface prefilter filters large particle impurities outside, there is no intermediate glass fiber layer, and although gradient filtration is formed, the overall product precision is not sufficient, the 4 μm efficiency ratio is lower by less than 72% during the filter paper test, which does not meet the high precision filtration requirement of national VI, and meanwhile, the coalescence of the intermediate glass fiber layer is lacked, and the separation efficiency of small particle water drops is significantly reduced; as can be seen from the comparative example 3, after the fully synthetic fiber prefiltering layer of the filter material is removed, the glass fiber layer on the oil inlet surface has high precision, so that a large amount of particle impurities are directly intercepted; the gradient filtration is not formed, the high-precision glass fiber layer is an oil inlet surface, the resistance rises too fast during testing, the testing time is shortened, the efficiency change is not large, the service life is shortened, and the dust holding capacity is low.
Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. The fuel composite filter material is characterized in that: the sequence of oil inlet surface and oil outlet surface is as follows: the device comprises a fully synthetic fiber prefilter layer, a high-precision glass fiber layer and a fully synthetic fiber hydrophobic layer;
the fully synthetic fiber prefilter layer is prepared from the following raw materials in parts by mass: 47-52 parts of 1.67D polyester fiber, 19-24 parts of 0.6D polyester fiber and 15-19 parts of sheath-core structure bicomponent polyester fiber;
the high-precision glass fiber layer is prepared from the following raw materials in parts by weight: 36-41 parts of glass fiber with the diameter of 1-5 mu m, 28-33 parts of glass wool with the diameter less than 1 mu m and 22-26 parts of glass fiber with the diameter of 8-10 mu m;
the fully synthetic fiber hydrophobic layer is prepared from the following raw materials in parts by mass: 10-12 parts of 1.67D polyester fiber, 32-35 parts of 0.6D polyester fiber, 15-18 parts of 0.3D polyester fiber, 12-15 parts of sheath-core structure bicomponent polyester fiber and 2-4 parts of 1-5 mu m glass fiber with the beating degree of more than 50 DEG SR.
2. The fuel oil composite filter material according to claim 1, characterized in that: the manufacturing processes of the fully synthetic fiber prefilter layer, the high-precision glass fiber layer and the fully synthetic fiber hydrophobic layer are as follows:
(1) Pulping: dispersing raw materials in sequence, and allowing the dispersed raw materials to pass through a high-frequency fluffer without cutter alignment and enter a slurry preparation tank for slurry preparation;
(2) And (3) net surfing molding: single-layer pulp distribution, integral forming and drying;
(3) Gluing: adopting acrylic resin adhesive for dip-coating, wherein the glass transition temperature of the resin adhesive is 45-55 ℃;
(4) And (3) drying again: the temperature is 105-120 ℃.
3. The fuel oil composite filter material according to claim 2, characterized in that: the raw material dispersion sequence and dispersion time of the fully synthetic fiber prefilter layer are as follows: firstly, 1.67D polyester fiber and 0.6D polyester fiber are mixed and dispersed for 6-8min, then the skin-core structure bicomponent polyester fiber is dispersed for 2-3min, the dispersing water is 100% clear water, the mass concentration of the dispersed fiber is 8-10%, and 0.3-0.5 per mill of the mass of the fiber is added into the prepared pulp.
4. The fuel composite filter material according to claim 2, characterized in that: adding organic silicon waterproofing agent into the fully synthetic fiber prefilter layer during gluing, wherein the adding mass is 0.4-0.5% of that of acrylic resin glue, and the basis weight of the paper is 45-50g/m 2 Air permeability of 650-750L/m 2 /s。
5. The fuel composite filter material according to claim 2, characterized in that: the raw material dispersion sequence and the dispersion time of the high-precision glass fiber layer are as follows: dispersing the raw materials for 10-12min with water of 60% clear water and 40% pure water, wherein the mass concentration of the dispersed fiber is 0.8-1%.
6. The fuel oil composite filter material according to claim 2, characterized in that: the quantitative paper of the glue coated high-precision glass fiber layer is 60-70g/m 2 Air permeability of 200-280L/m 2 /s。
7. The fuel composite filter material according to claim 2, characterized in that: the material dispersion sequence and the dispersion time of the completely-synthetic fiber hydrophobic layer are as follows: firstly, 1.67D polyester fibers and 0.6D polyester fibers are mixed and dispersed for 6-8min, then bicomponent polyester fibers with a skin-core structure are dispersed for 1-2min, 0.3D polyester fibers are continuously dispersed for 2-3min, finally glass fibers with the beating degree of more than 50 DEG SR are dispersed for 2-3min, the dispersion water is 80% of clear water plus 20% of pure water, and the mass concentration of the dispersed fibers is 6-8%; and adding a dispersing agent with the fiber mass of 0.3-0.5 per mill.
8. The fuel composite filter material according to claim 2, characterized in that: coating the hydrophobic layer of the fully synthetic fiber with adhesive, adding organosilicon waterproofing agent with the mass accounting for 10.5-12.5% of the acrylic resin adhesive, and making the paper quantitative of 85-95g/m 2 Air permeability of 330-380L/m 2 /s。
9. The fuel composite filter material according to claim 3 or 7, characterized in that: the dispersant is polyacrylamide, and the number average molecular weight is 1800-2000 ten thousand.
10. A process for producing a fuel composite filter material according to any one of claims 1 to 8, characterized in that: bonding the fully synthetic fiber prefilter layer, the high-precision glass fiber layer and the fully synthetic fiber hydrophobic layer according to the sequence of oil inlet surface and oil outlet surface, and bonding the middle of the layer structure by spraying modified polyester fiber glue yarns with the melting point of 185-220 ℃; the glue spraying amount of the layer is controlled to be 7-10g/m 2 。
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