CN116145322A - Sheath-core type double-component short fiber geotextile and preparation method thereof - Google Patents
Sheath-core type double-component short fiber geotextile and preparation method thereof Download PDFInfo
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- 239000000835 fiber Substances 0.000 title claims abstract description 156
- 239000004746 geotextile Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 230000002787 reinforcement Effects 0.000 claims abstract description 40
- 239000004743 Polypropylene Substances 0.000 claims abstract description 34
- 239000010410 layer Substances 0.000 claims abstract description 30
- 229920001155 polypropylene Polymers 0.000 claims abstract description 23
- 239000002356 single layer Substances 0.000 claims abstract description 23
- 238000005098 hot rolling Methods 0.000 claims abstract description 22
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 22
- 239000004698 Polyethylene Substances 0.000 claims abstract description 20
- -1 polyethylene Polymers 0.000 claims abstract description 20
- 229920000573 polyethylene Polymers 0.000 claims abstract description 20
- 239000012792 core layer Substances 0.000 claims abstract description 9
- 238000007596 consolidation process Methods 0.000 claims abstract description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000011148 porous material Substances 0.000 abstract description 3
- 238000009960 carding Methods 0.000 description 15
- 238000002156 mixing Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
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- 230000003014 reinforcing effect Effects 0.000 description 5
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- 238000011056 performance test Methods 0.000 description 3
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- 230000008901 benefit Effects 0.000 description 2
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43825—Composite fibres
- D04H1/43828—Composite fibres sheath-core
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
- D04H1/485—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with weld-bonding
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention relates to the technical field of non-woven fabrics, and provides a sheath-core type double-component short-fiber geotextile and a preparation method thereof. The invention webs sheath-core type double-component short fiber to obtain a single-layer fiber web, and the single-layer fiber web is paved to obtain a multi-layer fiber web, and the multi-layer fiber web is mechanically fixed to obtain a non-woven fabric, and the non-woven fabric is reinforced by hot air and hot rolled to obtain the sheath-core type double-component short fiber geotextile; the sheath layer of the sheath-core type double-component short fiber is polyethylene, and the core layer is alpha-polypropylene. According to the invention, through hot air reinforcement, the dimensional stability of the sheath-core type double-component short fiber geotextile is improved, and the deformation coefficient and creep property of the geotextile are further improved; the strength and compactness of the sheath-core type double-component short fiber geotextile are improved through hot rolling reinforcement. The invention adopts the sheath-core type double-component short fiber as the raw material, and combines with hot air reinforcement to ensure that the alpha-polypropylene short fiber is hot melted to play a role of consolidation, thereby improving the compactness of the sheath-core type double-component short fiber geotextile, reducing the pore size and improving the mechanical property of the sheath-core type double-component short fiber geotextile.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to a sheath-core type double-component short fiber geotextile and a preparation method thereof.
Background
Geotextile has the functions of isolation, filtration, drainage, protection, reinforcement, sealing and the like, and is an important component for ensuring the engineering safety of buildings, civil engineering, dams and the like. In the aspect of constructional engineering, the geotextile is directly used or matched with other building materials to play roles in enhancing, protecting and supporting engineering, and in the aspect of landscaping, geotextile is used to play roles in draining, protecting and protecting sun.
The common geotextile comprises a high-strength heavy denier PP geotextile, and is specifically divided into a high-strength heavy denier PP filament geotextile and a high-strength heavy denier PP short fiber geotextile according to different preparation methods. The high-strength coarse denier PP filament geotextile is prepared from PP slices serving as raw materials by using a spunbond-needling-heat finishing process. The high-strength heavy denier PP filament geotextile has good mechanical property and drainage property, but the geotextile is difficult to uniformly net in the production process and is easy to cause the problems of needling, entanglement, net fixing and the like, so that the geotextile is difficult to form and has great difficulty in structure control. The high-strength coarse denier PP short fiber geotextile is prepared from PP short fibers serving as raw materials by a carding-cross lapping-needling process. The high-strength heavy denier PP short fiber geotextile has the advantages of easy molding and easy control of structure. However, the high-strength coarse denier PP short-fiber geotextile is insufficient in longitudinal and transverse strength and fiber crimping degree in the production process, so that excellent mechanical properties cannot be obtained.
Therefore, finding a geotextile manufacturing process which is easy to form and high in structure control degree and can prepare geotextile with excellent mechanical properties becomes a problem to be solved urgently in geotechnical industry and textile industry.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the sheath-core type double-component short-fiber geotextile and the preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a sheath-core type double-component short fiber geotextile, which comprises the following steps:
(1) Forming a sheath-core type double-component short fiber into a net to obtain a single-layer fiber net;
(2) Lapping the single-layer fiber web to obtain a multi-layer fiber web;
(3) Mechanically fixing the multi-layer fiber web to obtain a non-woven fabric;
(4) Sequentially carrying out hot air reinforcement and hot rolling reinforcement on the non-woven fabric to obtain a sheath-core type double-component short fiber geotextile;
the sheath layer of the sheath-core type double-component short fiber is polyethylene, and the core layer is alpha-polypropylene; the melting point of the polyethylene is 90-150 ℃, and the melting point of the alpha-polypropylene is 110-180 ℃.
Preferably, the fineness of the sheath-core type double-component short fiber is 5-13 dtex, the length is 40-80 mm, the strength is more than 5.5cN/dtex, and the crimpness is 12-24/5 cm; the mass ratio of the skin layer to the core layer is 1-3: 9 to 7.
Preferably, the web formation is carding web formation; the lapping is cross lapping.
Preferably, the net outlet speed of the cross lapping is 1-10 m/min, and the net inlet speed is not more than 100m/min;
the multilayer web has a CV value of 2 to 3%.
Preferably, the rotating speed of carding web is 200-350 r/min, and the web outlet speed is 40-60 m/min.
Preferably, the mechanical fixing net is one of a needle-punched fixing net and a water-punched fixing net.
Preferably, the needle blade number of the needle for needling and fixing the net is 38-42, the needling frequency is 400-1100 times/min, and the needling density is 60-500 thorns/cm 2 The output speed of needling is 1-10 m/min.
Preferably, the aperture of the water needling needle for the water needling fixed net is 0.05-0.15 mm, the output speed of the dewatering net curtain is 0.5-20 m/min, and the water needling pressure is 5-30 MPa.
Preferably, the temperature of the hot air reinforcement is not more than 150 ℃; the temperature of the hot-rolled reinforcement is not more than 150 ℃.
The invention also provides the sheath-core type double-component short fiber geotextile prepared by the preparation method of the technical scheme, and the gram weight of the unit area of the sheath-core type double-component short fiber geotextile is 200-1000 g/m 2 。
The invention provides a preparation method of a sheath-core type double-component short fiber geotextile, which comprises the following steps: (1) Forming a sheath-core type double-component short fiber into a net to obtain a single-layer fiber net; (2) Lapping the single-layer fiber web to obtain a multi-layer fiber web; (3) Mechanically fixing the multi-layer fiber web to obtain a non-woven fabric; (4) Sequentially carrying out hot air reinforcement and hot rolling reinforcement on the non-woven fabric to obtain a sheath-core type double-component short fiber geotextile; the sheath layer of the sheath-core type double-component short fiber is polyethylene, and the core layer is alpha-polypropylene; the melting point of the polyethylene is 90-150 ℃, and the melting point of the alpha-polypropylene is 110-180 ℃. According to the invention, hot air and hot rolling secondary reinforcement are added on the basis of mechanical net fixing, wherein the hot air reinforcement improves the dimensional stability of the sheath-core type double-component short fiber geotextile, and further improves the deformation coefficient and creep property of the geotextile; the strength and compactness of the sheath-core type double-component short fiber geotextile can be improved through hot rolling reinforcement. The invention adopts the sheath-core type double-component short fiber composed of polyethylene short fiber and alpha-polypropylene short fiber as raw materials, combines hot air reinforcement and hot rolling reinforcement, ensures that the alpha-polypropylene short fiber has a consolidation effect by hot melting, improves the compactness of the sheath-core type double-component short fiber geotextile, reduces the pore size and improves the mechanical property of the sheath-core type double-component short fiber geotextile. The preparation method provided by the invention can enable the structure of the geotextile to be easier to control and easier to form. The example results show that the breaking strength of the sheath-core type double-component short fiber geotextile prepared by the invention is more than or equal to 15KN/m, the CBR bursting strength is more than or equal to 2.4kN, and the tearing strength is more than or equal to 430N.
The invention also provides the sheath-core type double-component short fiber geotextile prepared by the technical scheme, the production of the geotextile with high gram weight can be realized by adopting the method, the application range is expanded, and the gram weight of the product per unit area can reach 200-1000 g/m 2 。
Drawings
Fig. 1 is a schematic flow chart of a preparation method of a sheath-core type double-component short fiber geotextile.
Detailed Description
The invention provides a preparation method of a sheath-core type double-component short fiber geotextile, which comprises the following steps:
(1) Forming a sheath-core type double-component short fiber into a net to obtain a single-layer fiber net;
(2) Lapping the single-layer fiber web to obtain a multi-layer fiber web;
(3) Mechanically fixing the multi-layer fiber web to obtain a non-woven fabric;
(4) Sequentially carrying out hot air reinforcement and hot rolling reinforcement on the non-woven fabric to obtain a sheath-core type double-component short fiber geotextile;
the sheath layer of the sheath-core type double-component short fiber is polyethylene, and the core layer is alpha-polypropylene; the melting point of the polyethylene is 90-150 ℃, and the melting point of the alpha-polypropylene is 110-180 ℃.
The invention webs sheath-core type double-component short fibers to obtain a single-layer fiber web. In the invention, the sheath layer of the sheath-core type double-component short fiber is polyethylene, and the core layer is alpha-polypropylene; the melting point of the polyethylene is 90-150 ℃, more preferably 100-130 ℃, and the viscosity average molecular weight of the polyethylene is preferably 8800-300000, more preferably 10000-30000; the melting point of the alpha-polypropylene is 110-180 ℃, more preferably 130-150 ℃, and the viscosity average molecular weight of the alpha-polypropylene is preferably 50000-100000, more preferably 60000-95000; the fineness of the sheath-core type double-component short fiber is preferably 5-13 dtex, more preferably 10-13 dtex, the length is 40-80 mm, more preferably 50mm, the strength is preferably more than 5.5cN/dtex, and the crimping degree is preferably 12-24/5 cm; the mass ratio of the skin layer to the core layer is preferably 1-3: 9 to 7, more preferably 2:8, 8; the sheath-core type bicomponent short fiber is preferably a commercially available product or is prepared by itself; the method for self-preparing the sheath-core type double-component short fiber in the invention preferably comprises the following steps: mixing the polyethylene and the alpha-polypropylene according to the mass ratio, and then carrying out double-component composite spinning to obtain sheath-core double-component short fibers; the invention has no special requirement on the mode of the double-component composite spinning, and can be selected by a mode commonly used by a person skilled in the art.
In the invention, the preparation method of the sheath-core type bicomponent short fiber is preferably a drafting method; the parameters of the drawing process preferably include: the draft stage number is preferably 7 to 10, the draft temperature is preferably 50 to 90 ℃, and the draft ratio is preferably 4.5 to 7.5 times.
The invention adopts the sheath-core type double-component short fiber composed of polyethylene short fiber and alpha-polypropylene short fiber as raw materials, combines hot air reinforcement and hot rolling reinforcement, ensures that the alpha-polypropylene short fiber has a consolidation effect by hot melting, improves the compactness of the sheath-core type double-component short fiber geotextile, reduces the pore size and improves the mechanical property of the sheath-core type double-component short fiber geotextile. Meanwhile, the sheath-core type double-component short fiber has low price, and has a larger price advantage compared with the existing domestic PP filament geotextile.
In the present invention, the method further preferably comprises mixing the sheath-core bicomponent staple fiber prior to the web formation; the mixing equipment is preferably a cotton mixing feeder; the mixing capacity is not more than 800kg/h; the web formation is preferably carding; the carding machine is preferably a carding machine; the rotating speed of carding web is preferably 200-350 r/min, and the web discharging speed is preferably 40-60 m/min; the single-layer web preferably has a fiber length direction at an angle of less than 25 ° to the machine direction; the mass ratio of the fibers with the included angle of the length direction of the fibers and the machine direction of less than 25 degrees to the total fibers is preferably 0.85:1. According to the invention, by controlling the included angle degree between the length direction of the fiber and the machine direction and the mass ratio of the included angle degree to the total fiber, an excellent carding effect can be realized, and the follow-up lapping process is facilitated.
After a single-layer fiber web is obtained, the single-layer fiber web is paved to obtain a multi-layer fiber web. In the present invention, the lapping is preferably cross lapping. In the invention, the cross-lapping equipment is preferably a cross lapping machine with an auto-leveling function; the net-discharging speed of the cross-lapping is preferably 1-10 m/min, and the net-entering speed is preferably not more than 100m/min; the multilayer web preferably has a CV value of 2 to 3%. The invention ensures that the multilayer fiber net is more uniform by controlling CV value (fiber net uniformity), solves the problem of needling entanglement, simultaneously ensures that good reinforcement effect is realized in the subsequent heat reinforcement process, and realizes the effects of easy molding and high structure control degree of geotextile.
After the multi-layer fiber web is obtained, the multi-layer fiber web is mechanically fixed to obtain the non-woven fabric. In the invention, the equipment for mechanically fixing the net is preferably a needling machine; the mechanical fixed net is preferably one of a needling fixed net and a hydroentangling fixed net, and more preferably is a needling fixed net; the needle blade number of the needle for needling and fixing the net is preferably 38-42, more preferably 38, the needling frequency is preferably 400-1100 times/min, more preferably 800-1100 times/min, and the needling density is preferably 60-500 times/cm 2 More preferably 80 to 260 thorns/cm 2 The output speed of needling is preferably 1 to 10m/min, more preferably 2 to 3m/min; the aperture of the water needling needle for the water needling solid net is preferably 0.05-0.15 mm, the output speed of the dewatering net curtain is preferably 0.5-20 m/min, and the water needling pressure is preferably 5-30 MPa. The multi-layer fiber web disclosed by the invention can not increase the tensile strength only by strengthening needling, but can reduce the tensile strength due to the fact that the length of the fiber is shortened due to damage of the fiber caused by excessive needling, so that the tensile strength of geotextile is improved by reasonably regulating and controlling the needling density and needling depth.
After the non-woven fabric is obtained, the non-woven fabric is subjected to hot air reinforcement and hot rolling reinforcement in sequence, so that the sheath-core type double-component short fiber geotextile is obtained. In the invention, the hot air reinforcing device is preferably one of an oven and a perforated drum drying device, and the drum diameter of the perforated drum drying device is preferably 1400-6500 mm; the rotating speed of the hot air reinforcing equipment is preferably 3-15 m/min; the width of the oven is preferably 6300mm; the temperature of the hot air reinforcement is preferably not more than 150 ℃, more preferably 150 ℃; the hot rolling strengthening equipment is preferably a double-roller hot rolling mill; the output speed of the hot-rolling strengthening equipment is preferably 1-10 m/min; the temperature of the hot-rolled reinforcement is preferably not more than 150 ℃, more preferably 150 ℃.
The invention also provides the sheath-core type double-component short fiber geotextile prepared by the preparation method of the technical scheme, and the gram weight of the unit area of the sheath-core type double-component short fiber geotextile is 200-1000 g/m 2 More preferably 200 to 800g/m 2 The thickness of the sheath-core type double-component short fiber geotextile is preferably 1.15-8.25 mm, and more preferably 1.75-4.55 mm.
In order to further illustrate the present invention, the following examples are provided to describe the skin-core type bicomponent short fiber geotextile and the preparation method thereof in detail, but they should not be construed as limiting the scope of the present invention.
Fig. 1 is a schematic flow chart of a preparation method of a sheath-core type double-component short fiber geotextile, wherein the sheath-core type double-component short fiber is prepared into a single-layer fiber net, a multi-layer fiber net is obtained through net laying, a nonwoven fabric is reinforced through a mechanical net fixing mode, and finally the sheath-core type double-component short fiber geotextile is obtained through hot air reinforcement and hot rolling reinforcement.
The sheath-core type double-component short fiber used in the invention is prepared by the following preparation method:
mixing the skin raw material polyethylene and the core raw material alpha-polypropylene, and then carrying out double-component composite spinning to obtain skin-core double-component short fibers; the melting point of the polyethylene is 150 ℃, and the viscosity average molecular weight of the polyethylene is 8800; the melting point of the alpha-polypropylene is 110 ℃, and the viscosity average molecular weight of the alpha-polypropylene is 58000; the length of the sheath-core type double-component short fiber is 50mm, the strength is 7.2cN/dtex, and the crimp degree is 15/5 cm;
the mass ratio of polyethylene to α -polypropylene described in example 1 is 1:9, a step of performing the process; the fineness of the sheath-core type double-component short fiber is 10dtex;
the mass ratio of polyethylene to α -polypropylene described in example 2 is 2:8, the fineness of the sheath-core type double-component short fiber is 12dtex.
Example 1
(1) After mixing sheath-core type double-component short fibers in a large-bin cotton mixer, conveying the mixed short fibers to a carding machine through a cotton feeder with the capacity of 800kg/h, and forming a web in a carding mode to obtain a single-layer fiber web, wherein the rotating speed of carding and forming the web is 200r/min, the web outlet speed is 42m/min, and the included angle between the fiber length direction and the machine direction of the single-layer fiber web is 22 degrees; the mass ratio of the fiber with an included angle of 22 degrees between the length direction of the fiber and the machine direction of the fiber to the total fiber is 0.85:1;
(2) Conveying the single-layer fiber net to a cross lapping machine with an autoleveling function through a carding machine, lapping the single-layer fiber net by adopting a cross lapping mode to obtain a multi-layer fiber net, and conveying the multi-layer fiber net to a needling machine at the next step through a net conveying curtain with meshes, wherein the net outlet speed of the cross lapping is 8m/min, the net inlet speed is 80m/min, and the CV value is 2.4%;
(3) The multi-layer fiber web is reinforced into a non-woven fabric by adopting a needling and fixing mode, wherein the needle number of the needles is 40, the needling frequency is 500 times/min, and the needling density is 100 times/cm 2 The needling output speed is 3m/min;
(4) Carrying out hot air reinforcement on the prepared non-woven fabric, wherein the temperature of the hot air reinforcement is 140 ℃, the hot air reinforcement equipment is perforated drum drying equipment, the diameter of a drum is 6500mm, and the rotating speed is 8m/min;
(5) Carrying out hot rolling reinforcement on the obtained nonwoven fabric after hot air reinforcement to obtain a sheath-core type double-component short-fiber geotextile, wherein the hot rolling reinforcement temperature is 140 ℃, hot rolling reinforcement equipment is a double-roller hot rolling mill, the output speed is 8m/min, and the gram weight per unit area of the obtained sheath-core type double-component short-fiber geotextile is 200g/m 2 The thickness was 1.81mm.
Example 2
(1) After the sheath-core type double-component short fibers are mixed in a large-bin cotton mixer, the mixed short fibers are conveyed to a carding machine through a cotton feeder with the capacity of 800kg/h, and are formed into a single-layer fiber web in a carding web forming mode, wherein the rotating speed of carding web forming is 200r/min, the web outlet speed is 42m/min, and the included angle between the fiber length direction and the machine direction of the single-layer fiber web is 24 degrees; the mass ratio of the fiber with an included angle of 22 degrees between the length direction of the fiber and the machine direction of the fiber to the total fiber is 0.85:1;
(2) Conveying the single-layer fiber net to a cross lapping machine with an autoleveling function through a carding machine, lapping the single-layer fiber net by adopting a cross lapping mode to obtain a multi-layer fiber net, and conveying the multi-layer fiber net to a needling machine at the next step through a net conveying curtain with meshes, wherein the net outlet speed of the cross lapping is 8m/min, the net inlet speed is 80m/min, and the CV value is 2.1%;
(3) The multi-layer fiber web is reinforced into non-woven fabric by needle punching, wherein the needle number of the needle is 40, the needling frequency is 1000 times/min, and the needling density is 500 times/cm 2 The needling output speed is 3m/min;
(4) Carrying out hot air reinforcement on the prepared non-woven fabric, wherein the temperature of the hot air reinforcement is 140 ℃, the hot air reinforcement equipment is a wide oven, and the breadth is 6300mm;
(5) Hot-rolling and reinforcing the nonwoven fabric reinforced by hot air to obtain the sheath-core type double-component short-fiber geotextile, wherein the hot-rolling and reinforcing temperature is 140 ℃, hot-rolling and reinforcing equipment is a double-roller hot rolling mill, the output speed is 7.2m/min, and the gram weight per unit area of the sheath-core type double-component short-fiber geotextile is 600g/m 2 The thickness was 4.55mm.
Product performance test
The performance test was performed on the sheath-core type two-component short fiber geotextile prepared in examples 1 to 2, wherein the thickness of the GB/T13761 standard test product was referred to, the longitudinal breaking strength, the transverse breaking strength, the longitudinal breaking elongation and the transverse breaking elongation of the GB/T15788 standard test product were referred to, the CBR bursting strength of the GB/T14800 standard test product was referred to, the vertical permeability coefficient and the water permeability of the GB/T15789 standard test product was referred to, and the longitudinal tearing strength and the transverse tearing strength of the GB/T13763 standard test product were referred to, and the test results are specifically shown in Table 1.
Table 1 results of performance test of sheath-core type two-component short fiber geotextile prepared in examples 1 to 2
From the data, the breaking strength of the sheath-core type double-component short-fiber geotextile provided by the invention is more than or equal to 15KN/m, the CBR bursting strength is more than or equal to 2.4kN, and the tearing strength is more than or equal to 430N, so that the sheath-core type double-component short-fiber geotextile provided by the invention has excellent mechanical properties.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The preparation method of the sheath-core type double-component short fiber geotextile comprises the following steps:
(1) Forming a sheath-core type double-component short fiber into a net to obtain a single-layer fiber net;
(2) Lapping the single-layer fiber web to obtain a multi-layer fiber web;
(3) Mechanically fixing the multi-layer fiber web to obtain a non-woven fabric;
(4) Sequentially carrying out hot air reinforcement and hot rolling reinforcement on the non-woven fabric to obtain a sheath-core type double-component short fiber geotextile;
the sheath layer of the sheath-core type double-component short fiber is polyethylene, and the core layer is alpha-polypropylene; the melting point of the polyethylene is 90-150 ℃, and the melting point of the alpha-polypropylene is 110-180 ℃.
2. The preparation method according to claim 1, wherein the sheath-core bicomponent staple fiber has a fineness of 5-13 dtex, a length of 40-80 mm, a strength of >5.5cN/dtex, and a crimp of 12-24/5 cm; the mass ratio of the skin layer to the core layer is 1-3: 9 to 7.
3. The method of making according to claim 1, wherein the web formation is carded web formation; the lapping is cross lapping.
4. The method according to claim 3, wherein the cross-lapped wire-out speed is 1-10 m/min, and the wire-in speed is not more than 100m/min;
the multilayer web has a CV value of 2 to 3%.
5. A method of manufacture according to claim 3, wherein the carded web is rotated at a speed of 200-350 r/min and the web-out speed is 40-60 m/min.
6. The method of manufacturing according to claim 1, wherein the mechanical fastening net is one of a needle punched fastening net and a hydro punched fastening net.
7. The method according to claim 6, wherein the needle for needling a solid web has a needle blade number of 38 to 42, a needling frequency of 400 to 1100 times/min, and a needling density of 60 to 500 needles/cm 2 The output speed of needling is 1-10 m/min.
8. The preparation method according to claim 6, wherein the aperture of the water needle for the water jet fixing net is 0.05-0.15 mm, the output speed of the dewatering net curtain is 0.5-20 m/min, and the water jet pressure is 5-30 MPa.
9. The method of claim 1, wherein the temperature of the hot air consolidation is no greater than 150 ℃; the temperature of the hot-rolled reinforcement is not more than 150 ℃.
10. The sheath-core type double-component short fiber geotextile prepared by the preparation method of any one of claims 1 to 9, wherein the gram weight of the sheath-core type double-component short fiber geotextile in unit area is 200 to 1000g/m 2 。
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Citations (5)
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|---|---|---|---|---|
| JPH0770899A (en) * | 1993-08-31 | 1995-03-14 | Unitika Ltd | Heat-bonded nonwoven cloth and its production |
| CN108589031A (en) * | 2018-03-13 | 2018-09-28 | 福建雷尔新材料有限公司 | A kind of preparation method of high-pressure hot wind bonding non-woven fabrics |
| WO2021007746A1 (en) * | 2019-07-15 | 2021-01-21 | 山东省永信非织造材料有限公司 | Spunlace nonwoven material and processing method therefor |
| CN112853608A (en) * | 2020-12-29 | 2021-05-28 | 东华大学 | Environment-friendly heat-preservation jute non-woven fabric packaging material and preparation method thereof |
| CN115161875A (en) * | 2022-08-17 | 2022-10-11 | 浩阳环境股份有限公司 | Corrosion-resistant and aging-resistant non-woven geotextile produced by one-step method and production process thereof |
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2023
- 2023-01-09 CN CN202310023937.XA patent/CN116145322A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0770899A (en) * | 1993-08-31 | 1995-03-14 | Unitika Ltd | Heat-bonded nonwoven cloth and its production |
| CN108589031A (en) * | 2018-03-13 | 2018-09-28 | 福建雷尔新材料有限公司 | A kind of preparation method of high-pressure hot wind bonding non-woven fabrics |
| WO2021007746A1 (en) * | 2019-07-15 | 2021-01-21 | 山东省永信非织造材料有限公司 | Spunlace nonwoven material and processing method therefor |
| CN112853608A (en) * | 2020-12-29 | 2021-05-28 | 东华大学 | Environment-friendly heat-preservation jute non-woven fabric packaging material and preparation method thereof |
| CN115161875A (en) * | 2022-08-17 | 2022-10-11 | 浩阳环境股份有限公司 | Corrosion-resistant and aging-resistant non-woven geotextile produced by one-step method and production process thereof |
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