CN112853610A - High-strength wear-resistant jute non-woven fabric and preparation method thereof - Google Patents

High-strength wear-resistant jute non-woven fabric and preparation method thereof Download PDF

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CN112853610A
CN112853610A CN202011598581.5A CN202011598581A CN112853610A CN 112853610 A CN112853610 A CN 112853610A CN 202011598581 A CN202011598581 A CN 202011598581A CN 112853610 A CN112853610 A CN 112853610A
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jute
short fibers
pbs
resistant
strength
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CN112853610B (en
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毕雪蓉
曹巧丽
杨树
李佳蔚
张斌
郁崇文
杨建平
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Donghua University
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Donghua University
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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
    • D04H1/488—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 bonding agents
    • 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
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/063—Load-responsive characteristics high strength

Abstract

The invention relates to a high-strength wear-resistant jute non-woven fabric and a preparation method thereof; the method comprises the steps of firstly, preparing a fiber net by taking jute short fibers and PBS short fibers as raw materials, then uniformly scattering polyurethane powder on the fiber net, and then carrying out needling and hot rolling for shaping to prepare the high-strength wear-resistant jute non-woven fabric; in the raw materials, the mass content of PBS short fibers is not lower than 30 percent; the hot rolling setting temperature is 105-112 ℃, the hot rolling speed is 15-25 m/min, and the roller linear pressure is 200-300N/cm; in the prepared non-woven fabric comprising the jute short fibers, the polyurethane powder and the PBS short fibers, the jute short fibers and the PBS short fibers are bonded by the molten polyurethane, and the unmelted PBS short fibers and the jute short fibers are mutually entangled, so that the non-woven fabric keeps certain softness; the density of the non-woven fabric surface is 90-110 g/m2The transverse breaking strength is 100-125N, the longitudinal breaking strength is 90-105N, the bursting strength is 80-95N, and the wear resistance index is 85-100 times/mg.

Description

High-strength wear-resistant jute non-woven fabric and preparation method thereof
Technical Field
The invention belongs to the technical field of non-woven fabrics, and relates to a high-strength wear-resistant jute non-woven fabric and a preparation method thereof.
Background
China is one of the most abundant countries of the world with hemp resources, and the jute short fibers have high strength and are biodegradable. The polybutylene succinate (PBS) fiber is a biodegradable polymer fiber and has excellent mechanical property and processability. The excellent performance of the jute short fiber is combined with the non-woven processing technology, so that the environment-friendly packaging bag can be prepared. However, the jute short fibers contain more non-cellulose substances such as lignin, pectin, hemicellulose and the like besides cellulose, and the existence of the non-cellulose substances causes the jute short fibers to be coarse and hard, has small entanglement among fibers, poor cohesion and poor web forming property.
Needle punching is a common way of consolidating a web of fibers for non-woven fabrics. It is a processing method which uses various shapes to puncture the fiber web to make the fibers intertwined and tightly combined. The needle punched fiber net is fluffy, good in permeability and excellent in mechanical property, but has rough surface and low smoothness. The hot rolling bonding is to heat and press the fiber web by using a heating roller, so that hot melt fibers in the fiber web are melted, flowed and diffused to generate bonding effect, thereby reinforcing the fiber web. The hot-rolled non-woven fabric has the advantages of smooth and clean surface, stable size structure and good wear resistance. In the field of the existing packaging materials, the requirements of smooth surface, good wear resistance and high strength are high, so that the production of the jute non-woven fabric for packaging needs to be matched with the use of needling and hot rolling bonding processes. However, the hot rolling temperature of the conventional hot-rolled bonded nonwoven fabric is higher than the melting point of the binder fibers, so that the binder fibers are completely melted, and the material is stiff and has poor softness.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a high-strength wear-resistant jute non-woven fabric and a preparation method thereof. In the prior art, the jute short fibers are difficult to form a net in a non-weaving process due to the coarse and hard properties, and the fibers are not easy to tangle, so that the strength of the fiber net is low. In the invention, the PBS short fiber is added into the jute non-woven fabric, which is beneficial to forming a web by the jute short fiber and improving the uniformity of the web. The elongated, soft PBS staple fibers are more likely to entangle during needling, which can improve web strength. Meanwhile, the melting point of the PBS short fibers is lower than the thermal decomposition point of the jute short fibers and higher than the melting point of the polyurethane powder, the polyurethane powder is completely melted through a hot rolling process to bond the jute short fibers and the PBS short fibers, but the PBS short fibers are only partially melted, and a large amount of unmelted PBS short fibers still play a role in entanglement and reinforcement in a fiber net, so that the strength of the non-woven material is improved, and a certain softness is still maintained.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of a high-strength wear-resistant jute non-woven fabric comprises the steps of firstly, preparing a fiber mesh by taking jute short fibers and PBS (poly butylene succinate) short fibers as raw materials, then uniformly scattering polyurethane powder on the fiber mesh, and then carrying out needling and hot rolling sizing to prepare the high-strength wear-resistant jute non-woven fabric;
in the raw materials, the mass content of the jute short fibers is not less than 50 percent, and the mass content of the PBS short fibers is not less than 30 percent;
the hot rolling setting temperature is 105-112 ℃, the hot rolling speed is 15-25 m/min, and the roller linear pressure is 200-300N/cm.
As a preferred technical scheme:
according to the preparation method of the high-strength wear-resistant jute non-woven fabric, in the raw materials, the mass percent of jute short fibers is 50-70%, and the mass percent of PBS short fibers is 30-50%.
The preparation method of the high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
pretreatment: pretreating the jute short fibers by using pretreatment liquid; in order to make the short jute fiber fine and soft, the short jute fiber is pretreated before being laid into a net.
Compounding the pretreated jute short fibers and PBS short fibers, and then preliminarily mixing and uniformly mixing;
the preliminary mixing is as follows: performing preliminary mixing in a coarse opener;
the uniform mixing is as follows: conveying the primarily mixed fibers into a cotton storage box of a cotton mixing machine, conveying the primarily mixed fibers through a brad curtain, and allowing the primarily mixed fibers to enter a vibrating cotton box after the primarily mixed fibers are acted by a cotton homogenizing roller and a cotton stripping roller so as to uniformly mix the fibers;
opening and carding the uniformly mixed fibers to prepare a fiber web;
feeding the uniformly mixed fibers into a fine opener to further open the raw materials, and outputting the raw materials to an air pressure cotton box through an air pressure pipeline to form sheet cotton type mixed fibers; carding the banquet type mixed fibers into a thin fiber web by a carding machine;
firstly, after lapping and disorderly drafting a fiber web, uniformly scattering polyurethane powder on the fiber web, and then reinforcing by needling to obtain a needled fiber web; the disorder drafting is to pass the laid fiber web through a disorder drafting machine to increase the disorder degree of the fiber web structure; the entanglement degree of fibers is improved during needling, and the polyurethane powder is penetrated into the fiber web along with the felting needles.
And (4) carrying out hot rolling and sizing on the needled fiber web through a hot rolling mill to obtain the high-strength wear-resistant jute non-woven fabric.
According to the preparation method of the high-strength wear-resistant jute non-woven fabric, the pretreatment solution comprises the following substances in percentage by weight: h2O2The concentration is 4.5-6 g/L, the concentration of NaOH is 2.5-4 g/L, Na2SO3The concentration of Na is 1.5-2.5 g/L5P3O10The concentration is 2.5-3.5 g/L; the pretreatment process comprises the following steps: the bath ratio is 1: 10-15, the reaction time is 120-150 min, and the reaction temperature is 100-110 ℃. The treated jute short fibers have reduced fineness and improved softness, are favorable for mutual entanglement with PBS short fibers in the non-weaving process, and improve the strength of a fiber web. The mechanism of the pretreatment is: under the alkaline condition, hydrogen peroxide is easy to decompose to generate a plurality of substances with strong oxidizing property, and the substances can interact with non-cellulose substances to quickly remove the non-cellulose substances in jute. After pretreatment, the jute short fibers become thin, the smoothness and the softness are improved, the web forming performance is improved, and the bonding strength of the jute short fibers and the PBS short fibers is improved.
According to the preparation method of the high-strength wear-resistant jute non-woven fabric, in the uniform mixing process, the corner nail curtain speed of a cotton mixer is 45-80 m/min, the horizontal curtain speed is 0.3-0.7 m/min, the rotation speed of a cotton homogenizing roller is 582-882 r/min, and the rotation speed of a cotton stripping roller is 412-686 r/min;
in the carding process, the rotating speed of the licker-in is 600-900 r/min, the rotating speed of the cylinder is 300-500 r/min, the rotating speed of the doffer is 15-40 r/min, and the speed of the working roll is 670-960 r/min.
The lapping mode is cross lapping;
the draft multiple in the messy draft process is 2.2-2.6;
the needling density in the needling process is 100-200 needling/cm2The needling depth is 6-8 mm, the needling frequency is 150-350 needling/min, and the number of needling channels is 2.
In the preparation method of the high-strength wear-resistant jute non-woven fabric, the melting point of the PBS short fiber is 115 ℃.
According to the preparation method of the high-strength wear-resistant jute non-woven fabric, the polyurethane powder is the reactive polyurethane hot melt adhesive; the average grain diameter is 150-500 mu m, and the melting point is 80-100 ℃.
The invention also provides the high-strength wear-resistant jute non-woven fabric prepared by the preparation method of the high-strength wear-resistant jute non-woven fabric, which comprises the non-woven fabric formed by jute short fibers, polyurethane and PBS short fibers; the jute short fibers and the PBS short fibers are bonded by the molten polyurethane in the non-woven fabric, and the unmelted PBS short fibers and the jute fibers are intertwined with each other, so that the non-woven fabric keeps certain softness; the mass content of the polyurethane powder on the high-strength wear-resistant jute nonwoven fabric is 5-10% of the sum of the mass of the jute short fibers and the mass of the PBS short fibers.
As a preferred technical scheme:
according to the high-strength wear-resistant jute non-woven fabric, the mass content of the polyurethane powder on the high-strength wear-resistant jute non-woven fabric is 5-10% of the sum of the mass of the jute short fibers and the mass of the PBS short fibers.
According to the high-strength wear-resistant jute non-woven fabric, the PBS short fibers on the surface layer of the fiber net are melted during hot rolling to have bonding effect on the jute short fibers, and meanwhile, the molten PBS short fibers in the fiber netThe polyurethane powder has a bonding effect on adjacent jute short fibers or PBS short fibers, so that the breaking strength of the non-woven fabric can be improved; the surface density of the high-strength wear-resistant jute non-woven fabric is 90-110 g/m2The transverse breaking strength is 100-125N, the longitudinal breaking strength is 90-105N, the bursting strength is 80-95N, and the wear resistance index is 85-100 times/mg.
The principle of the invention is as follows:
because the jute short fibers are thick and have higher rigidity, the fiber is difficult to form a net in the non-weaving process, and the fibers are not easy to tangle, so that the strength of the fiber net is low. PBS short fiber with large breaking strength and high breaking elongation is added into jute non-woven fabric, which is beneficial to forming a web.
After PBS short fiber and jute short fiber are mixed and carded into a net, polyurethane powder is uniformly scattered on the surface of the net, the polyurethane powder enters the inside of the net along with a pricking pin by utilizing the pricking pin for pricking the net, and is embedded between the jute short fiber and the PBS short fiber, and the polyurethane powder is completely melted in the net by utilizing a hot rolling process. When the polyurethane powder is melted, because of the strong hydrogen bond acting force between the polyurethane macromolecules and the jute short fibers, the polyurethane powder has good compatibility and a compact interface structure; the-NCO group of the polyurethane molecule can react with the-OH group in the PBS molecule, and the chemical bond enables the polyurethane molecule to have strong interface effect, so that the jute short fiber and the PBS short fiber can be better bonded, and the strength of the non-woven material is effectively improved.
Roll temperature, pressure and hot rolling speed are key factors for hot rolling and setting. High temperature, high pressure and low speed, which are all beneficial to the fusion of the bonding fiber. However, the strength tends to increase and decrease with the degree of fusion of the binder fiber, and therefore, it is necessary to control the degree of fusion of the binder fiber, i.e., the PBS staple fiber. When the web entered the hot-rolled bonding zone consisting of the rolls, the polyurethane powder was first melted, bonding the jute fibers and PBS staple fibers throughout the web; the PBS short fibers move by heated molecular chains, the fibers are melted when the movement is violent, and when the hot rolling temperature is too high, the melted PBS short fibers enter the fiber net and are also melted; when the hot rolling temperature is too low, the PBS short fibers cannot be melted and cannot play a role in bonding; the hot rolling setting temperature adopted by the invention is slightly lower than the melting point of the PBS short fiber and higher than the melting point of the polyurethane powder, and when the hot rolling setting is carried out, the thermal effect generated by the deformation of the fiber is generated by the pressure and the speed, so that the PBS short fiber only positioned on the surface layer of the fiber net is melted, and the polyurethane powder is completely melted, thereby forming the structure that the jute short fiber and the PBS short fiber on the surface are bonded, the PBS short fiber and the jute short fiber are entangled, and the polyurethane powder is bonded with the jute short fiber and the PBS short fiber. This structure is decisive for the high strength and surface finish properties of the nonwoven material.
In the non-woven process adopted by the invention, the hot rolling and shaping temperature is 105-112 ℃, the hot rolling speed is 15-25 m/min, and the linear pressure of a roller is 200-300N/cm. Under the condition, the PBS short fibers are melted on the surface of the fiber web, so that the surface of the non-woven material is smoother and more wear-resistant. The PBS short fibers in the fiber net are not melted or are slightly melted and still intertwined with the jute short fibers, the polyurethane powder is completely melted in the fiber net, and the intertwining and bonding of the PBS short fibers and the jute short fibers are further enhanced, so that the strength of the non-woven material is effectively improved, and a certain softness is kept.
Has the advantages that:
the invention relates to a preparation method of a high-strength wear-resistant jute non-woven fabric, which comprises the steps of mixing pretreated jute short fibers and PBS short fibers, carding to form a net, uniformly scattering polyurethane powder on the surface of the net, enabling the polyurethane powder to enter the inside of the net along with a felting needle, and melting the polyurethane powder and the PBS short fibers on the surface layer of the net by controlling the hot rolling temperature, the hot rolling speed and the pressure of a roller line, so that the surface smoothness and the wear resistance are improved. The PBS short fibers in the fiber net are not melted or are slightly melted and still intertwined with the jute short fibers, the polyurethane powder in the fiber net is completely melted, the intertwining and bonding effects of the PBS short fibers and the jute short fibers are further enhanced, the fibers are not hardened and stiff, and the strength of the jute non-woven fabric is improved.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The performance index testing method comprises the following steps:
the method for testing the transverse breaking strength comprises the following steps: GB/T24218.3-2010;
the method for testing the longitudinal breaking strength comprises the following steps: GB/T24218.3-2010;
the method for testing bursting strength comprises the following steps: GBT 24218.5-2016;
the abrasion resistance index test method comprises the following steps: GB/T21196.1-2007, GB/T21196.2-2007, GB/T21196.3-2007 and GB/T21196.4-2007;
example 1
A preparation method of a high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
(1) preparing a pretreatment solution: the pretreatment liquid comprises the following substances in percentage by weight: h2O2Concentration 4.5g/L, NaOH concentration 2.5g/L, Na2SO3Concentration 1.5g/L, Na5P3O10The concentration is 2.5 g/L;
(2) pretreatment: pretreating the jute short fibers by using pretreatment liquid; wherein the pretreatment process comprises the following steps: the bath ratio is 1:10, the reaction time is 120min, and the reaction temperature is 110 ℃;
(3) compounding the pretreated jute short fibers and PBS short fibers with the melting point of 115 ℃, and then preliminarily mixing and uniformly mixing; the mass percent of the jute short fibers is 50 percent, and the mass percent of the PBS short fibers is 50 percent;
(4) opening and carding the uniformly mixed fibers to prepare a fiber web; in the process of uniform mixing, the speed of the angle nail curtain is 45m/min, the speed of the horizontal curtain is 0.3m/min, the rotating speed of the cotton-homogenizing roller is 582r/min, and the rotating speed of the cotton-stripping roller is 412 r/min. The rotating speed of the licker-in the carding process is 600r/min, the rotating speed of the cylinder is 300r/min, the rotating speed of the doffer is 15r/min, and the speed of the working roll is 670 r/min.
(5) Firstly, lapping and disorderly drafting a fiber web, then uniformly scattering reactive polyurethane hot melt adhesive powder on the fiber web, and then reinforcing by needling to obtain a needled non-woven fabric; the lapping mode is cross lapping; the draft multiple in the disordered draft process is 2.2; the average particle size of the reactive polyurethane hot melt adhesive powder is 150 mu m, and the melting point is 80 ℃; the mass of the reactive polyurethane hot melt adhesive powder on the high-strength wear-resistant jute non-woven fabric is 10% of the sum of the mass of the jute short fibers and the mass of the PBS short fibers; the needling density in the needling process is 100 needling/cm2The needling depth is 6mm, the needling frequency is 150 needling/min, and the number of needling channels is 2.
(6) Carrying out hot rolling and shaping on the needled non-woven fabric, wherein the hot rolling and shaping temperature is 112 ℃, the hot rolling speed is 25m/min, and the linear pressure of a roller is 200N/cm; obtaining the high-strength wear-resistant jute non-woven fabric;
the surface density of the prepared high-strength wear-resistant jute non-woven fabric is 110g/m2The transverse breaking strength is 125N, the longitudinal breaking strength is 105N, the bursting strength is 95N, and the wear resistance index is 100 times/mg.
Example 2
A preparation method of a high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
(1) preparing a pretreatment solution: the pretreatment liquid comprises the following substances in percentage by weight: h2O2Concentration 5.1g/L, NaOH concentration 3.5g/L, Na2SO3Concentration 2.2g/L, Na5P3O10The concentration is 2.7 g/L;
(2) pretreatment: pretreating the jute short fibers by using pretreatment liquid; wherein the pretreatment process comprises the following steps: the bath ratio is 1:12, the reaction time is 135min, and the reaction temperature is 106 ℃;
(3) compounding the pretreated jute short fibers and PBS short fibers with the melting point of 115 ℃, and then preliminarily mixing and uniformly mixing; the mass percent of the jute short fibers is 55 percent, and the mass percent of the PBS short fibers is 45 percent;
(4) opening and carding the uniformly mixed fibers to prepare a fiber web; in the process of uniform mixing, the speed of a fillet nail curtain of a cotton mixer is 55m/min, the speed of a horizontal curtain is 0.3m/min, the rotating speed of a cotton equalizing roller is 649r/min, and the rotating speed of a cotton stripping roller is 438 r/min. The rotating speed of the licker-in the carding process is 760r/min, the rotating speed of the cylinder is 425r/min, the rotating speed of the doffer is 28r/min, and the speed of the working roll is 750 r/min.
(5) Firstly, lapping and disorderly drafting a fiber web, then uniformly scattering reactive polyurethane hot melt adhesive powder on the fiber web, and then reinforcing by needling to obtain a needled non-woven fabric; the lapping mode is cross lapping; the draft multiple in the disordered draft process is 2.2; the average particle size of the reactive polyurethane hot melt adhesive powder is 335 mu m, and the melting point is 80 ℃; the mass of the reactive polyurethane hot melt adhesive powder on the high-strength wear-resistant jute non-woven fabric is 10% of the sum of the mass of the jute short fibers and the mass of the PBS short fibers; the needling density in the needling process is 110 needling/cm2The needling depth is 6mm, the needling frequency is 290 needling/min, and the number of needling channels is 2.
(6) Carrying out hot rolling and shaping on the needled non-woven fabric, wherein the hot rolling and shaping temperature is 112 ℃, the hot rolling speed is 22m/min, and the linear pressure of a roller is 206N/cm; obtaining the high-strength wear-resistant jute non-woven fabric;
the surface density of the prepared high-strength wear-resistant jute non-woven fabric is 108g/m2The transverse breaking strength is 122N, the longitudinal breaking strength is 104N, the bursting strength is 93N, and the wear resistance index is 98 times/mg.
Example 3
A preparation method of a high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
(1) preparing a pretreatment solution: the pretreatment liquid comprises the following substances in percentage by weight: h2O2Concentration 4.5g/L, NaOH concentration 3.1g/L, Na2SO3Concentration 1.9g/L, Na5P3O10The concentration is 3.2 g/L;
(2) pretreatment: pretreating the jute short fibers by using pretreatment liquid; wherein the pretreatment process comprises the following steps: the bath ratio is 1:10, the reaction time is 140min, and the reaction temperature is 102 ℃;
(3) compounding the pretreated jute short fibers and PBS short fibers with the melting point of 115 ℃, and then preliminarily mixing and uniformly mixing; the mass percent of the jute short fibers is 55 percent, and the mass percent of the PBS short fibers is 45 percent;
(4) opening and carding the uniformly mixed fibers to prepare a fiber web; in the process of uniform mixing, the speed of the angle nail curtain of the cotton mixing machine is 79m/min, the speed of the horizontal curtain is 0.7m/min, the rotating speed of the cotton homogenizing roller is 871r/min, and the rotating speed of the cotton stripping roller is 618 r/min. In the carding process, the rotating speed of a licker-in is 840r/min, the rotating speed of a cylinder is 480r/min, the rotating speed of a doffer is 39r/min, and the speed of a working roll is 950 r/min;
(5) firstly, lapping and disorderly drafting a fiber web, then uniformly scattering reactive polyurethane hot melt adhesive powder on the fiber web, and then reinforcing by needling to obtain a needled non-woven fabric; the lapping mode is cross lapping; the draft multiple in the disordered draft process is 2.5; the average particle size of the reactive polyurethane hot melt adhesive powder is 351 mu m, and the melting point is 90 ℃; the mass of the reactive polyurethane hot melt adhesive powder on the high-strength wear-resistant jute nonwoven fabric is 8 percent of the sum of the mass of the jute short fibers and the mass of the PBS short fibers; the needling density is 120 needling/cm in the needling process2The needling depth is 7mm, the needling frequency is 190 punches/min, and the number of needling channels is 2.
(6) Carrying out hot rolling and shaping on the needled non-woven fabric, wherein the hot rolling and shaping temperature is 109 ℃, the hot rolling speed is 19m/min, and the linear pressure of a roller is 229N/cm; obtaining the high-strength wear-resistant jute non-woven fabric;
the surface density of the prepared high-strength wear-resistant jute non-woven fabric is 105g/m2The transverse breaking strength is 122N, the longitudinal breaking strength is 103N, the bursting strength is 90N, and the wear resistance index is 94 times/mg.
Example 4
A preparation method of a high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
(1) preparing a pretreatment solution: the pretreatment liquid comprises the following substances in percentage by weight: h2O2Concentration 5.3g/L, NaOH concentration 2.9g/L, Na2SO3Concentration 2.1g/L, Na5P3O10The concentration is 3.2 g/L;
(2) pretreatment: pretreating the jute short fibers by using pretreatment liquid; wherein the pretreatment process comprises the following steps: the bath ratio is 1:12, the reaction time is 120min, and the reaction temperature is 110 ℃;
(3) compounding the pretreated jute short fibers and PBS short fibers with the melting point of 115 ℃, and then preliminarily mixing and uniformly mixing; the mass percent of the jute short fibers is 60 percent, and the mass percent of the PBS short fibers is 40 percent;
(4) opening and carding the uniformly mixed fibers to prepare a fiber web; in the process of uniform mixing, the speed of a fillet nail curtain of a cotton mixer is 45m/min, the speed of a horizontal curtain is 0.3m/min, the rotating speed of a cotton equalizing roller is 605r/min, and the rotating speed of a cotton stripping roller is 420 r/min. The rotating speed of the licker-in roller in the carding process is 760r/min, the rotating speed of the cylinder is 360r/min, the rotating speed of the doffer is 26r/min, and the speed of the working roller is 735 r/min;
(5) firstly, lapping and disorderly drafting a fiber web, then uniformly scattering reactive polyurethane hot melt adhesive powder on the fiber web, and then reinforcing by needling to obtain a needled non-woven fabric; the lapping mode is cross lapping; the draft multiple in the disordered draft process is 2.2; the average particle size of the reactive polyurethane hot melt adhesive powder is 368 mu m, and the melting point is 80 ℃; the mass of the reactive polyurethane hot melt adhesive powder on the high-strength wear-resistant jute nonwoven fabric is 8 percent of the sum of the mass of the jute short fibers and the mass of the PBS short fibers; the needling density in the needling process is 180 needling/cm2The needling depth is 7mm, the needling frequency is 280 needling/min, and the number of needling channels is 2;
(6) carrying out hot rolling and shaping on the needled non-woven fabric, wherein the hot rolling and shaping temperature is 107 ℃, the hot rolling speed is 20m/min, and the linear pressure of a roller is 230N/cm; obtaining the high-strength wear-resistant jute non-woven fabric;
the surface density of the prepared high-strength wear-resistant jute non-woven fabric is 102g/m2The transverse breaking strength is 121N, the longitudinal breaking strength is 95N, the bursting strength is 87N, and the wear resistance index is 91 times/mg.
Example 5
A preparation method of a high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
(1) preparing a pretreatment solution: the pretreatment liquid comprises the following substances in percentage by weight: h2O2Concentration 4.5g/L, NaOH concentration 3.1g/L, Na2SO3Concentration 2.3g/L, Na5P3O10The concentration is 2.7 g/L;
(2) pretreatment: pretreating the jute short fibers by using pretreatment liquid; wherein the pretreatment process comprises the following steps: the bath ratio is 1:12, the reaction time is 140min, and the reaction temperature is 106 ℃;
(3) compounding the pretreated jute short fibers and PBS short fibers with the melting point of 115 ℃, and then preliminarily mixing and uniformly mixing; the mass percent of the jute short fibers is 60 percent, and the mass percent of the PBS short fibers is 40 percent;
(4) opening and carding the uniformly mixed fibers to prepare a fiber web; in the process of uniform mixing, the speed of a fillet nail curtain of a cotton mixing machine is 56m/min, the speed of a horizontal curtain is 0.3m/min, the rotating speed of a cotton homogenizing roller is 671r/min, and the rotating speed of a cotton stripping roller is 488 r/min. The rotating speed of the licker-in the carding process is 790r/min, the rotating speed of the cylinder is 435r/min, the rotating speed of the doffer is 29r/min, and the speed of the working roll is 850 r/min.
(5) Firstly, lapping and disorderly drafting a fiber web, then uniformly scattering reactive polyurethane hot melt adhesive powder on the fiber web, and then reinforcing by needling to obtain a needled non-woven fabric; the lapping mode is cross lapping; the draft multiple in the disordered draft process is 2.3; the average particle size of the reactive polyurethane hot melt adhesive powder is 299 mu m, and the melting point is 90 ℃; the mass of the reactive polyurethane hot melt adhesive powder on the high-strength wear-resistant jute nonwoven fabric is 7 percent of the sum of the mass of the jute short fibers and the mass of the PBS short fibers; the needling density in the needling process is 175 needling/cm2The needling depth is 8mm, the needling frequency is 340 needling/min, and the number of needling channels is 2.
(6) Carrying out hot rolling and shaping on the needle-punched non-woven fabric, wherein the hot rolling and shaping temperature is 106 ℃, the hot rolling speed is 19m/min, and the linear pressure of a roller is 243N/cm; obtaining the high-strength wear-resistant jute non-woven fabric;
the surface density of the prepared high-strength wear-resistant jute non-woven fabric is 98g/m2The transverse breaking strength is 113N, the longitudinal breaking strength is 94N, the bursting strength is 85N, and the abrasion resistance index is 91 times/mg.
Example 6
A preparation method of a high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
(1) preparing a pretreatment solution: the pretreatment liquid comprises the following substances in percentage by weight: h2O2Concentration 5.2g/L, NaOH concentration 3.6g/L, Na2SO3Concentration 2.5g/L, Na5P3O10The concentration is 2.8 g/L;
(2) pretreatment: pretreating the jute short fibers by using pretreatment liquid; wherein the pretreatment process comprises the following steps: the bath ratio is 1:12, the reaction time is 136min, and the reaction temperature is 108 ℃;
(3) compounding the pretreated jute short fibers and PBS short fibers with the melting point of 115 ℃, and then preliminarily mixing and uniformly mixing; the mass percent of the jute short fibers is 60 percent, and the mass percent of the PBS short fibers is 40 percent;
(4) opening and carding the uniformly mixed fibers to prepare a fiber web; in the process of uniform mixing, the speed of the brad curtain of the cotton mixer is 68m/min, the speed of the horizontal curtain is 0.3m/min, the rotating speed of the cotton equalizing roller is 835r/min, and the rotating speed of the cotton stripping roller is 596 r/min. In the carding process, the rotating speed of the licker-in is 840r/min, the rotating speed of the cylinder is 470r/min, the rotating speed of the doffer is 39r/min, and the speed of the working roll is 920 r/min.
(5) Firstly, lapping and disorderly drafting a fiber web, then uniformly scattering reactive polyurethane hot melt adhesive powder on the fiber web, and then reinforcing by needling to obtain a needled non-woven fabric; the lapping mode is cross lapping; the draft multiple in the disordered draft process is 2.5; the average particle size of the reactive polyurethane hot melt adhesive powder is 287 mu m, and the melting point is 90 ℃; the mass of the reactive polyurethane hot melt adhesive powder on the high-strength wear-resistant jute nonwoven fabric is 6 percent of the sum of the mass of the jute short fibers and the mass of the PBS short fibers; the needling density in the needling process is 100 needling/cm2The needling depth is 6mm, the needling frequency is 170 needling/min, and the number of needling channels is 2.
(6) Carrying out hot rolling and shaping on the needle-punched non-woven fabric, wherein the hot rolling and shaping temperature is 106 ℃, the hot rolling speed is 18m/min, and the linear pressure of a roller is 287N/cm; obtaining the high-strength wear-resistant jute non-woven fabric;
the surface density of the prepared high-strength wear-resistant jute non-woven fabric is 96g/m2Transverse breaking strength of 108N, longitudinal breaking strength of 93N, and bursting strength84N and an abrasion resistance index of 88 times/mg.
Example 7
A preparation method of a high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
(1) preparing a pretreatment solution: the pretreatment liquid comprises the following substances in percentage by weight: h2O2Concentration 4.7g/L, NaOH concentration 2.5g/L, Na2SO3Concentration 1.7g/L, Na5P3O10The concentration is 2.7 g/L;
(2) pretreatment: pretreating the jute short fibers by using pretreatment liquid; wherein the pretreatment process comprises the following steps: the bath ratio is 1:12, the reaction time is 145min, and the reaction temperature is 102 ℃;
(3) compounding the pretreated jute short fibers and PBS short fibers with the melting point of 115 ℃, and then preliminarily mixing and uniformly mixing; the mass percent of the jute short fibers is 65 percent, and the mass percent of the PBS short fibers is 35 percent;
(4) opening and carding the uniformly mixed fibers to prepare a fiber web; in the process of uniform mixing, the speed of a fillet nail curtain of a cotton mixer is 63m/min, the speed of a horizontal curtain is 0.3m/min, the rotating speed of a cotton homogenizing roller is 794r/min, and the rotating speed of a cotton stripping roller is 562 r/min. The rotating speed of the licker-in the carding process is 790r/min, the rotating speed of the cylinder is 460r/min, the rotating speed of the doffer is 34r/min, and the speed of the working roll is 865 r/min.
(5) Firstly, lapping and disorderly drafting a fiber web, then uniformly scattering reactive polyurethane hot melt adhesive powder on the fiber web, and then reinforcing by needling to obtain a needled non-woven fabric; the lapping mode is cross lapping; the draft multiple in the disordered draft process is 2.5; the average particle size of the reactive polyurethane hot melt adhesive powder is 150 mu m, and the melting point is 100 ℃; the mass of the reactive polyurethane hot melt adhesive powder on the high-strength wear-resistant jute nonwoven fabric is 6 percent of the sum of the mass of the jute short fibers and the mass of the PBS short fibers; the needling density in the needling process is 100 needling/cm2The needling depth is 7mm, the needling frequency is 158 punches/min, and the number of needling passes is 2.
(6) Carrying out hot rolling and shaping on the needled non-woven fabric, wherein the hot rolling and shaping temperature is 105 ℃, the hot rolling speed is 17m/min, and the linear pressure of a roller is 289N/cm; obtaining the high-strength wear-resistant jute non-woven fabric;
the surface density of the prepared high-strength wear-resistant jute non-woven fabric is 93g/m2The transverse breaking strength is 103N, the longitudinal breaking strength is 91N, the bursting strength is 82N, and the abrasion resistance index is 87 times/mg.
Example 8
A preparation method of a high-strength wear-resistant jute non-woven fabric comprises the following specific process flows:
(1) preparing a pretreatment solution: the pretreatment liquid comprises the following substances in percentage by weight: h2O2The concentration is 6g/L, the NaOH concentration is 4g/L, Na2SO3Concentration 2.5g/L, Na5P3O10The concentration is 3.5 g/L;
(2) pretreatment: pretreating the jute short fibers by using pretreatment liquid; wherein the pretreatment process comprises the following steps: the bath ratio is 1:15, the reaction time is 150min, and the reaction temperature is 100 ℃;
(3) compounding the pretreated jute short fibers and PBS short fibers with the melting point of 115 ℃, and then preliminarily mixing and uniformly mixing; the mass percent of the jute short fibers is 70 percent, and the mass percent of the PBS short fibers is 30 percent;
(4) opening and carding the uniformly mixed fibers to prepare a fiber web; in the process of uniform mixing, the speed of a fillet nail curtain of a cotton mixer is 80m/min, the speed of a horizontal curtain is 0.7m/min, the rotating speed of a cotton homogenizing roller is 882r/min, and the rotating speed of a cotton stripping roller is 686 r/min. The rotating speed of the licker-in the carding process is 900r/min, the rotating speed of the cylinder is 500r/min, the rotating speed of the doffer is 40r/min, and the speed of the working roll is 960 r/min.
(5) Firstly, lapping and disorderly drafting a fiber web, then uniformly scattering reactive polyurethane hot melt adhesive powder on the fiber web, and then reinforcing by needling to obtain a needled non-woven fabric; the lapping mode is cross lapping; the draft multiple in the disordered draft process is 2.6; the average particle size of the reactive polyurethane hot melt adhesive powder is 500 mu m, and the melting point is 100 ℃; the mass of the reactive polyurethane hot melt adhesive powder on the high-strength wear-resistant jute nonwoven fabric is 5 percent of the sum of the mass of the jute short fibers and the mass of the PBS short fibers; the needling density in the needling process is 200 needling/cm2The needling depth is 8mm, and the needling frequency is 350 needlingPermin, the number of acupuncture passes is 2.
(6) Carrying out hot rolling and shaping on the needled non-woven fabric, wherein the hot rolling and shaping temperature is 105 ℃, the hot rolling speed is 15m/min, and the linear pressure of a roller is 300N/cm; obtaining the high-strength wear-resistant jute non-woven fabric;
the surface density of the prepared high-strength wear-resistant jute non-woven fabric is 90g/m2The transverse breaking strength is 100N, the longitudinal breaking strength is 90N, the bursting strength is 80N, and the wear resistance index is 85 times/mg.

Claims (10)

1. A preparation method of a high-strength wear-resistant jute non-woven fabric is characterized by comprising the following steps: firstly, making jute short fibers and PBS short fibers into a fiber net, uniformly scattering polyurethane powder on the fiber net, and then carrying out needling and hot rolling for shaping to prepare the high-strength wear-resistant jute non-woven fabric;
in the raw materials, the mass content of the jute short fibers is not less than 50 percent, and the mass content of the PBS short fibers is not less than 30 percent;
the hot rolling setting temperature is 105-112 ℃, the hot rolling speed is 15-25 m/min, and the roller linear pressure is 200-300N/cm.
2. The preparation method of the high-strength wear-resistant jute nonwoven fabric according to claim 1, wherein the raw materials comprise 50-70% by mass of jute short fibers and 30-50% by mass of PBS short fibers.
3. The preparation method of the high-strength wear-resistant jute nonwoven fabric according to claim 1, comprising the following specific process flows:
(1) pretreatment: pretreating the jute short fibers by using pretreatment liquid;
(2) compounding the pretreated jute short fibers and PBS short fibers, and then preliminarily mixing and uniformly mixing;
(3) opening and carding the uniformly mixed fibers to prepare a fiber web;
(4) firstly, after lapping and disorderly drafting a fiber web, uniformly scattering polyurethane powder on the fiber web, and then reinforcing by needling to obtain a needled fiber web;
(5) and (4) carrying out hot rolling and sizing on the needled fiber web to obtain the high-strength wear-resistant jute non-woven fabric.
4. The method for preparing the high-strength wear-resistant jute nonwoven fabric according to claim 3, wherein the pretreatment solution comprises the following substances by weight: h2O2The concentration is 4.5-6 g/L, the concentration of NaOH is 2.5-4 g/L, Na2SO3The concentration of Na is 1.5-2.5 g/L5P3O10The concentration is 2.5-3.5 g/L; the pretreatment process comprises the following steps: the bath ratio is 1: 10-15, the reaction time is 120-150 min, and the reaction temperature is 100-110 ℃.
5. A method for preparing a high strength abrasion resistant jute nonwoven as claimed in claim 3 wherein the PBS staple fibers have a melting point of 115 ℃.
6. The preparation method of the high-strength wear-resistant jute nonwoven fabric according to claim 3, wherein in the uniform mixing process, the corner nail curtain speed of a cotton mixer is 45-80 m/min, the horizontal curtain speed is 0.3-0.7 m/min, the rotation speed of a cotton homogenizing roller is 582-882 r/min, and the rotation speed of a cotton stripping roller is 412-686 r/min;
in the carding process, the rotating speed of a licker-in is 600-900 r/min, the rotating speed of a cylinder is 300-500 r/min, the rotating speed of a doffer is 15-40 r/min, and the speed of a working roll is 670-960 r/min;
the lapping mode is cross lapping;
the draft multiple in the messy draft process is 2.2-2.6;
the needling density in the needling process is 100-200 needling/cm2The needling depth is 6-8 mm, the needling frequency is 150-350 needling/min, and the number of needling channels is 2.
7. The method for preparing a jute non-woven fabric with high strength and wear resistance as claimed in claim 3, wherein the polyurethane powder is a reactive polyurethane hot melt adhesive; the average grain diameter is 150-500 mu m, and the melting point is 80-100 ℃.
8. The high-strength wear-resistant jute nonwoven fabric prepared by the preparation method of the high-strength wear-resistant jute nonwoven fabric according to claims 1 to 7 is characterized in that: the jute short fibers and the PBS short fibers are bonded by the molten polyurethane in the non-woven fabric consisting of the jute short fibers, the polyurethane and the PBS short fibers, and the unmelted PBS short fibers and the jute fibers are mutually entangled.
9. The high-strength wear-resistant jute nonwoven fabric according to claim 8, wherein the mass content of the polyurethane powder on the high-strength wear-resistant jute nonwoven fabric is 5-10% of the sum of the mass of the jute short fibers and the mass of the PBS short fibers.
10. The jute nonwoven of claim 8, wherein the high strength abrasion resistant jute nonwoven has an areal density of 90 to 110g/m2The transverse breaking strength is 100-125N, the longitudinal breaking strength is 90-105N, the bursting strength is 80-95N, and the wear resistance index is 85-100 times/mg.
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