CN111876911B - Low-chip pulp composite jacquard non-woven fabric and manufacturing method thereof - Google Patents
Low-chip pulp composite jacquard non-woven fabric and manufacturing method thereof Download PDFInfo
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- CN111876911B CN111876911B CN202010889870.4A CN202010889870A CN111876911B CN 111876911 B CN111876911 B CN 111876911B CN 202010889870 A CN202010889870 A CN 202010889870A CN 111876911 B CN111876911 B CN 111876911B
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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
- D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
- D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
- D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet
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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
- D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
- D04H5/08—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of fibres or yarns
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Abstract
The invention belongs to the field of non-woven fabrics, and discloses a low-chip pulp composite jacquard non-woven fabric and a manufacturing method thereof. Consists of a single pulp fiber layer or consists of a pulp fiber layer and a plurality of fiber layers in a composite way; the gram weight of the non-woven fabric is 20-150 g/m 2 The surface of the non-woven fabric prepared by the manufacturing method provided by the invention has multi-dimensional three-dimensional patterns, the appearance lines are clearer and more flexible, the smooth surface of the non-woven fabric is obtained by a pure physical method, the performance of raw materials is fully exerted, and the defects of thin thickness, hard handfeel, single pattern, serious chip falling, chemical auxiliary agent residue and the like of the traditional composite non-woven fabric are overcome. The surface of the non-woven fabric has three-dimensional patterns, the dry thickness is more than 0.4mm, the liquid absorption rate is more than 500 percent, and the chip removing performance is less than 2g/m 2 Can be applied to various wiping fields.
Description
Technical Field
The invention belongs to the field of non-woven fabrics, and relates to a low-chip pulp composite jacquard non-woven fabric and a manufacturing method thereof.
Background
The pulp composite nonwoven fabric is a main stream product in the wiping market due to its excellent hygroscopicity, but the pulp composite nonwoven fabric is a main factor affecting chip falling and itching due to the use of wood pulp fibers with a short length, and a process of adding an adhesive to the pulp composite nonwoven fabric or using high-temperature post-finishing embossing is generally used to overcome the disadvantage, but the adoption of the above method has a plurality of problems. The adhesive has the effect of solidifying wood pulp fibers to reduce the chip of the product, but belongs to a chemical crosslinking agent, the product treated by the adhesive is easy to yellow and hard in hand feeling, in addition, equipment pollution can be caused in the adhesive finishing process, chemical auxiliary agent residues are also generated in the product, and the use safety cannot be ensured. Embossing is a physical process used to improve the consolidation of wood pulp fibers, but the process requires high temperatures, typically in the range of about the melting point of the product stock, such as reduced product thickness after Wen Gahua, stiffening of the hand, and insignificant improvement in chip removal properties of the product. In summary, the pulp composite nonwoven fabric in the market at present has the defects of thin thickness, hard hand feeling, single grain pattern, serious chip drop, residual chemical auxiliary agent and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a low-chip-removing pulp composite jacquard nonwoven fabric and a manufacturing method thereof, wherein the surface of the nonwoven fabric is provided with three-dimensional patterns, and the chip removing performance is less than 2g/m 2 The dry thickness is more than 0.4mm, and the liquid is absorbedThe rate is more than 500 percent, and the gram weight is 20 to 150g/m 2 Can be applied to various wiping fields.
The above object of the present invention is achieved by the following technical solutions:
a low-chip pulp composite jacquard nonwoven fabric; the composite fiber consists of a plurality of fiber layers, wherein the fiber layers are pulp fiber layers or fiber layers A; the composite composition of a plurality of fiber layers is specifically as follows: consists of a single pulp fiber layer or consists of a pulp fiber layer and a plurality of fiber layers in a composite way; the gram weight of each fiber layer is 2-150 g/m 2 。
The pulp fiber layer is made of any one or more of wood pulp fibers and cellulose fibers or any one or more of wood pulp fibers and chemical fibers, and the length of the cellulose fibers and the length of the chemical fibers are 3-20 mm, wherein the cellulose fibers are preferably made of cotton fibers, hemp fibers, viscose fibers and lyocell fibers, and the chemical fibers are preferably made of polyester fibers, polypropylene fibers, polyethylene fibers, nylon fibers and multicomponent fibers thereof.
The material of the fiber layer A is any combination of one or more of cellulose fibers and chemical fibers; the length range of the fiber is more than or equal to 1mm;
the fibrous layer a may preferably be an ultra-short fibrous layer or a chopped fibrous layer or a continuous filament fibrous layer.
The material of the ultra-short fiber layer is one or a combination of more of cotton fiber, fibrilia, viscose fiber, lyocell fiber, terylene fiber, polypropylene fiber, polyethylene fiber, carbon fiber, stainless steel fiber and the like.
The chopped fiber layer is made of one or more of cotton fiber, fibrilia, viscose fiber, lyocell fiber, cuprammonium fiber, acetate fiber, polyester fiber, polypropylene fiber, polyethylene fiber, nylon fiber, polytetrafluoroethylene fiber, carbon fiber, stainless steel fiber and the like.
The continuous filament fiber layer is made of one or a combination of more of viscose fiber, polyester fiber, polypropylene fiber, polyethylene fiber, nylon fiber, polytetrafluoroethylene fiber and the like.
The ultra-short fiber layer is preferably an ultra-short fiber layer which is made of ultra-short fibers with the fiber length of 1-15 mm.
The chopped fiber layer is preferably made of chopped fibers with the fiber length of 20-76 mm.
The continuous filament fiber layer is preferably a continuous filament fiber layer which is formed by taking continuous filament fibers with the fiber length of more than or equal to 100mm as materials.
The gram weight of the non-woven fabric is 20-150 g/m 2 Wherein the pulp fiber layer accounts for 10-100% of the total gram weight of the non-woven fabric, and the fiber layer A accounts for 0-90% of the total gram weight of the non-woven fabric.
The manufacturing method of the low-chip pulp composite jacquard nonwoven fabric comprises the following steps:
s1, preparation of fiber layer
The gram weight of the single fiber layer is 2-150 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The fiber layer with better mechanical strength is obtained by controlling the arrangement direction of the fibers in the fiber layer, and the specific method is as follows:
(1) Preparing a pulp fiber layer; the pulp fiber layer is molded in an aqueous medium system, the arrangement direction of fibers in the fiber layer is controlled by adjusting the arrangement and the speed ratio of a pulp flow device and a suction structure in the molding process, and the angle range of the fibers and the mechanical running direction is 0-360 degrees. Compared with the prior art, the ultrasonic dispersing device is arranged in the arrangement of the pulp flow device and the suction structure, the frequency is 20 kHz-40 kHz, the uniformity and the distribution direction of the fibers can be effectively controlled, wherein the frequency of the ultrasonic dispersing device is 25kHz, the speed ratio of the pulp flow device to the suction structure is 1.5:1, the angle between the fibers and the mechanical running direction is 25-55 degrees, and the strength of the obtained pulp fiber layer is better.
(2) Preparing an ultrashort fiber layer; the ultra-short fiber layer is molded in an aqueous medium system, the arrangement direction of the fibers in the fiber layer is controlled by adjusting the arrangement and the speed ratio of a pulp flow device and a suction structure in the molding process, and the angle range of the fibers and the mechanical running direction is 0-360 degrees. Compared with the prior art, the ultrasonic dispersing device is arranged in the arrangement of the pulp flow device and the suction structure, the frequency is 20 kHz-40 kHz, the uniformity and the distribution direction of the fibers can be effectively controlled, wherein the frequency of the ultrasonic dispersing device is 25kHz, the speed ratio of the pulp flow device to the suction structure is 1.5:1, the angle between the fibers and the mechanical running direction is 25-55 degrees, and the strength of the obtained ultra-short fiber layer is better.
(3) Preparing a chopped fiber layer; the chopped fiber layer is formed in a mechanical net forming system, and the arrangement direction of the fibers in the fiber layer is controlled by adjusting the running angle and the running acceleration of the fiber collecting curtain in the forming process, and the angle range of the fibers and the mechanical running direction is 0-180 degrees. Unlike the prior art, the running angle of the collecting curtain is controlled by adjusting a plurality of groups of air bag devices arranged on the collecting curtain carrier roller, and when the air bag pressure is 0bar, the angle between the fiber and the mechanical running direction is 0 degree; when the balloon pressure was 8bar, the angle of the fibers to the machine direction was 180 degrees. Wherein the preferable air bag pressure is 2bar, the angle between the fiber and the machine running direction is 30-50 degrees, and the strength of the obtained chopped fiber layer is better.
(4) Preparing a continuous filament fiber layer; the continuous filament fiber layer is formed in an air medium system, the arrangement direction of the fibers in the fiber layer is controlled by adjusting the swing angle of a forming head in the forming process, and the angle range of the fibers and the mechanical running direction is 0-90 degrees.
S2, compounding fiber layers
After the fiber layers in the step S1 are prepared, according to a combination mode required by the non-woven fabric, a single layer or a plurality of fiber layers are clamped and input into high-speed air and water mixing equipment through an anti-static bottom curtain and an anti-sticking top curtain, and after the fiber layers are further mixed and exhausted, fibers in the fiber layers are lapped and bonded together, so that the combination of the fiber layers is realized.
S3, three-dimensional pattern distribution and consolidation of composite fiber layer
Distributing the fiber layer compounded in the step S2 through the action of specific air flow and water flow to form patterns with three-dimensional structures, wherein the action direction of the air flow and the water flow is penetrated from the fiber layer with longer length to the fiber layer with shorter length, and the fiber layer distribution mode in the specific direction can effectively reduce the loss rate of short fibers and fibersThe loss rate is reduced to be within 7 percent, the chip-falling performance of the product can be improved, and the chip-falling performance of the product is less than 2g/m 2 The three-dimensional pattern distribution of the fibers in the fiber layer has better fluffiness under the action of air flow, and the thickness of the product is more than 0.4mm.
The air flow is controlled by adjusting the speed ratio of the water jet mechanism, the small hole width and depth ratio of the suction structure, the patterns of the suction structure, the ventilation quantity of the filter medium and the vacuum degree of the suction system, wherein the speed ratio range of the water jet mechanism is 1-20%, the small hole width and depth ratio range of the suction structure is 0.6-2.5, the suction structure is provided with octagon distributed groove through holes with the width of 1-8 mm, the ventilation quantity of the filter medium is 2800-7000 mm/s, and the vacuum degree range of the suction system is-0.01 to-0.05 MP.
The water flow is controlled by adjusting the water flow in unit time, the porosity of the water flow distribution body and the arrangement quantity range of the water flow distribution body, wherein the water flow in unit time ranges from 16 m to 40m 3 And/h, the porosity range of the water flow distribution body is 6-37%, and the arrangement number range of the water flow distribution body is 3-10.
And solidifying and forming the fiber layers distributed to form the patterns with the three-dimensional structure through the action of water jet, wherein the pressure range of the water jet is controlled to be 30-200 bar in the forming process.
S4, cloth cover modification.
Carrying out cloth cover modification on the non-woven fabric obtained after the preparation in the step S3;
(1) The random hairiness on the surface of the fiber layer is removed, thereby obtaining a non-woven fabric with a smooth surface, and a pressurizing method or a deweighting process can be used.
(2) The pressurizing process is to increase superfine water jet penetrating technology in the modification process, control the pressure range of superfine water jet to 10-60 bar, and make hairiness on the surface of the fiber layer planted into the fiber layer and consolidated, so as to reduce hairiness on the surface of the product.
(3) The reduction process is to burn off hairiness on the surface of the fiber layer by using a singeing process in the modification process, so as to reduce the hairiness on the surface of the product, and the temperature range of the surface of the copper roller is controlled to be 150-280 ℃ in the singeing process.
The mechanical strength of the low-chip pulp composite jacquard nonwoven fabric prepared by the method is controlled by adjusting the arrangement direction of fibers in a fiber layer, and the included angle between the fibers and the mechanical running direction can be adjusted to be 0-360 degrees.
The single-sided or double-sided of the low-chip pulp composite jacquard nonwoven fabric is provided with multi-dimensional three-dimensional patterns, and the patterns comprise various elements such as lines, dots and the like with different angles, different lengths, different thicknesses and different heights and combinations thereof.
Compared with the prior art, the invention has the beneficial effects that:
the low-chip pulp composite jacquard nonwoven fabric provided by the invention meets the increasing requirements of customers on the safety and novelty of spun-laced nonwoven fabric products, and can be used in the fields of personal care products such as personal cleaning wet tissues, disinfection wet tissues and other nursing wet tissues, household wiping products such as household cleaning and floor wiping tissues, and dry tissue wiping such as beauty tissues and cotton soft tissues.
Compared with the existing products in the market, the surface of the non-woven fabric prepared by the manufacturing method provided by the invention has multi-dimensional three-dimensional patterns, the appearance patterns of the non-woven fabric prepared by the manufacturing method provided by the invention are clearer and more flexible, the smooth surface of the non-woven fabric is obtained by a pure physical method, the performance of raw materials is fully exerted, and the defects of thin thickness, hard hand feeling, single pattern, serious chip drop, residual chemical auxiliary agents and the like of the existing composite non-woven fabric are overcome.
Drawings
FIG. 1 is a graph showing the effect of a low chip pulp composite jacquard nonwoven fabric prepared in example 1 of the present invention.
FIG. 2 is a graph showing the effect of a low chip pulp composite jacquard nonwoven fabric prepared in example 2 of the present invention.
Detailed Description
The present invention is described in detail below by way of specific examples, but the scope of the present invention is not limited thereto. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and all experimental equipment, materials, reagents, etc. used can be obtained from commercial sources.
Example 1
Low-chip-falling pulp composite jacquard nonwoven fabric
Low-chip pulp composite jacquard nonwoven fabric with gram weight of 80g/m 2 Consists of a pulp fiber layer and an adhesive chopped fiber layer, wherein the gram weight of the pulp fiber layer is 40g/m 2 The adhesive chopped fiber layer had a gram weight of 40g/m 2 ，
The preparation of the low-chip pulp composite jacquard nonwoven fabric comprises four steps:
1. and (3) preparing a fiber layer. The pulp fiber layer is formed in an aqueous medium system, an ultrasonic dispersing device is arranged in the arrangement of a pulp flow device and a suction structure, the frequency is 25kHz, the speed ratio of the pulp flow device to the suction is 1.5:1, and the angle between the fibers in the pulp fiber layer and the mechanical running direction is 45 degrees. The viscose chopped fiber layer is formed in a mechanical net forming system, the card clothing angle on the cotton opening and picking mixed curtain is 55 degrees, the speed of the mixed curtain is 60m/min, the mixed curtain is arranged in a case, mixed air flow is arranged in the case, and the front end of the mixed curtain is provided with a transition curtain. The primary decomposing roller speed is 850m/min, the secondary decomposing roller speed is 600m/min, the tertiary decomposing roller speed is 950m/min, and the final decomposing roller speed is 1050m/min. The fiber angle in the viscose chopped fiber layer is controlled by adjusting a plurality of groups of air bag devices arranged on the collecting curtain carrier roller, and when the air bag pressure is 2bar, the fiber and the mechanical running direction angle is 30-50 degrees.
2. And compounding the fiber layers. The pulp fiber layer and the viscose chopped fiber layer are clamped and input into high-speed air and water mixing equipment through an anti-static bottom curtain and an anti-sticking flower top curtain, the speed ratio of the anti-static bottom curtain to the anti-sticking flower top curtain is 1.25:1, the pressure of the high-speed air and water mixing equipment is 40-140 bar, the thickness of the compounded fiber layer is 8mm, the compounding speed of the pulp fiber layer and the viscose chopped fiber layer is controlled at 85m/min, and after the compounded fiber layer is further mixed and exhausted, the fibers in the compounded fiber layer are lapped and bonded together, and the thickness of the exhausted compound fiber layer is 3mm.
3. Three-dimensional flower of composite fiber layerGrain distribution and consolidation. Carrying out three-dimensional pattern distribution and consolidation on the composite fiber layer obtained in the second step; the ratio of the speed of the water jet mechanism is 7%, the ratio of the width to the depth of the small hole of the suction structure is 0.8, the suction structure is provided with groove through holes which are distributed in a 5mm octagonal shape, the ventilation quantity of the filter medium is 4000mm/s, and the vacuum degree of the suction system is-0.02 MPa; water flow rate in unit time 36m 3 And/h, the porosity of the water flow distribution body is 13%, and the arrangement quantity of the water flow distribution body is 8. The composite fiber layer obtained in the second step is distributed to form patterns with a three-dimensional structure through the action of the specific airflow and the water flow, the action direction of the airflow and the water flow penetrates from the fiber layer with longer length to the fiber layer with shorter length, the fiber layer distribution mode in the specific direction can effectively reduce the loss rate of short fibers, the loss rate of fibers is reduced to 5%, the fiber layer still has good fluffiness, and the three-dimensional pattern composite fiber layer with the thickness of 4mm is obtained. The surface of the viscose chopped fiber layer is provided with a three-dimensional pattern.
4. And (5) cloth cover modification. The cloth cover is modified by adopting a pressurizing method, and the modification pressure of superfine water flow is 40bar. The resultant nonwoven fabric (FIG. 1) had a tenacity of 50N/5cm and a product chip-off of 1.5g/m 2 The thickness of the product is 1.2mm, and the liquid absorption rate is 729%.
Example 2
Low-chip-falling pulp composite jacquard nonwoven fabric
Low-chip pulp composite jacquard nonwoven fabric with gram weight of 50g/m 2 Consists of a pulp fiber layer and a polyester chopped fiber layer, wherein the gram weight of the pulp fiber layer is 25g/m 2 The gram weight of the polyester chopped fiber layer is 25g/m 2 ，
The preparation of the low-chip pulp composite jacquard nonwoven fabric comprises four steps:
1. and (3) preparing a fiber layer. The pulp fiber layer is formed in an aqueous medium system, an ultrasonic dispersing device is arranged in the arrangement of a pulp flow device and a suction structure, the frequency is 20kHz, the speed ratio of the pulp flow device to the suction is 1.5:1, and the angle between the fibers in the pulp fiber layer and the mechanical running direction is 40 degrees.
The polyester chopped fiber layer is formed in a mechanical net forming system, the card clothing angle on the cotton opening and picking mixed curtain is 45 degrees, the speed of the mixed curtain is 65m/min, the mixed curtain is arranged in a case, mixed air flow is arranged in the case, and the front end of the mixed curtain is provided with a transition curtain. The speed of the primary decomposing roller is 800m/min, the speed of the secondary decomposing roller is 550m/min, the speed of the tertiary decomposing roller is 900m/min, and the speed of the final decomposing roller is 1020m/min. The fiber angle in the polyester chopped fiber layer is controlled by adjusting a plurality of groups of air bag devices arranged on the collecting curtain carrier roller, and when the air bag pressure is 2bar, the fiber and the mechanical running direction angle is 30-50 degrees.
2. And compounding the fiber layers. The pulp fiber layer and the viscose chopped fiber layer are clamped and input into high-speed air and water mixing equipment through an anti-static bottom curtain and an anti-sticking flower top curtain, the speed ratio of the anti-static bottom curtain to the anti-sticking flower top curtain is 1.52:1, the pressure of the high-speed air and water mixing equipment is 40-95 bar, the thickness of the compounded fiber layer is 12mm, the compounding speed of the pulp fiber layer and the viscose chopped fiber layer is controlled to be 100m/min, and after the compounded fiber layer is further mixed and exhausted, the fibers in the compounded fiber layer are lapped and bonded together, and the thickness of the exhausted compound fiber layer is 5mm.
3. And (3) three-dimensional pattern distribution and consolidation of the composite fiber layer. Carrying out three-dimensional pattern distribution and consolidation on the composite fiber layer obtained in the second step; the ratio of the speed of the water jet mechanism is 7%, the ratio of the width to the depth of the small hole of the suction structure is 1.2, the suction structure is provided with groove through holes distributed in a 2mm octagonal shape, the ventilation quantity of the filter medium is 3600mm/s, and the vacuum degree of the suction system is-0.01 MPa; water flow rate in unit time 25m 3 And/h, the porosity of the water flow distribution body is 20%, and the arrangement quantity of the water flow distribution body is 6. The composite fiber layer obtained in the second step is distributed to form patterns with a three-dimensional structure through the action of the specific airflow and the water flow, the action direction of the airflow and the water flow penetrates from the fiber layer with longer length to the fiber layer with shorter length, the fiber layer distribution mode in the specific direction can effectively reduce the loss rate of short fibers, the loss rate of fibers is reduced to 5%, the fiber layer still has good fluffiness, and the three-dimensional pattern composite fiber layer with the thickness of 5mm is obtained. The surface of the polyester chopped fiber layer is provided with three-dimensional patterns.
4. And (5) cloth cover modification. Dressing cloth cover by pressurizing method, superfine water flowThe finishing pressure is 30bar. The resultant nonwoven fabric (FIG. 2) had a tenacity of 70N/5cm and a product chip-off of 1.3g/m 2 The thickness of the product is 0.7mm, and the liquid absorption rate is 608%.
The above-described embodiments are only preferred embodiments of the invention, and not all embodiments of the invention are possible. Any obvious modifications thereof, which would be apparent to those skilled in the art without departing from the principles and spirit of the present invention, should be considered to be included within the scope of the appended claims.
Claims (7)
1. The manufacturing method of the low-chip pulp composite jacquard nonwoven fabric is characterized by comprising the following steps of: s1, preparation of fiber layer
The gram weight of the single fiber layer is 2-150 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The fiber layer with better mechanical strength is obtained by controlling the arrangement direction of the fibers in the fiber layer, and the specific method is as follows:
(1) Preparing a pulp fiber layer; forming the pulp fiber layer in an aqueous medium system, wherein the arrangement direction of fibers in the fiber layer is controlled by adjusting the arrangement and the speed ratio of a pulp flow device and a suction structure in the forming process, and the angle range of the fibers and the mechanical running direction is 0-360 degrees; the arrangement of the pulp flow device and the suction structure is provided with an ultrasonic dispersing device with the frequency of 20 kHz-40 kHz, the speed ratio of the pulp flow device to the suction structure is 1.5:1, and the angle between the fiber and the mechanical running direction is 25-55 degrees;
(2) Preparing an ultrashort fiber layer; forming the ultra-short fiber layer in an aqueous medium system, wherein the arrangement direction of the fibers in the fiber layer is controlled by adjusting the arrangement and the speed ratio of a pulp flow device and a suction structure in the forming process, and the angle range of the fibers and the mechanical running direction is 0-360 degrees; the arrangement of the pulp flow device and the suction structure is provided with an ultrasonic dispersing device with the frequency of 20 kHz-40 kHz, the speed ratio of the pulp flow device to the suction structure is 1.5:1, and the angle between the fiber and the mechanical running direction is 25-55 degrees;
(3) Preparing a chopped fiber layer; forming the chopped fiber layer in a mechanical net forming system, wherein the arrangement direction of the fibers in the fiber layer is controlled by adjusting the operation angle and the operation acceleration of a fiber collecting curtain in the forming process, and the angle range of the fibers and the mechanical operation direction is 0-180 degrees;
(4) Preparing a continuous filament fiber layer; forming the continuous filament fiber layer in an air medium system, wherein the arrangement direction of the fibers in the fiber layer is controlled by adjusting the swing angle of a forming head in the forming process, and the angle range between the fibers and the mechanical running direction is 0-90 degrees;
s2, compounding fiber layers
After the fiber layers in the step S1 are prepared, according to a combination mode required by non-woven fabrics, a single layer or a plurality of fiber layers are clamped and input into high-speed air and water mixing equipment through an anti-static bottom curtain and an anti-sticking top curtain, and after the fiber layers are further mixed and exhausted, fibers in the fiber layers are lapped and bonded together, so that the combination of the fiber layers is realized;
s3, three-dimensional pattern distribution and consolidation of composite fiber layer
Distributing the fiber layer compounded in the step S2 through the action of air flow and water flow to form patterns with three-dimensional structures, wherein the action direction of the air flow and the water flow penetrates from the fiber layer with longer length to the fiber layer with shorter length;
the air flow is controlled by adjusting the speed ratio of the water jet mechanism, the small hole width and depth ratio of the suction structure, the pattern of the suction structure, the ventilation amount of the filter medium and the vacuum degree of the suction system, wherein the speed ratio range of the water jet mechanism is 1-20%, the small hole width and depth ratio range of the suction structure is 0.6-2.5, the suction structure is provided with octagon distributed groove through holes with the width of 1-8 mm, the ventilation amount of the filter medium is 2800-7000 mm/s, and the vacuum degree range of the suction system is-0.01-0.05 MP;
the water flow is controlled by adjusting the water flow in unit time, the porosity of the water flow distribution body and the arrangement quantity range of the water flow distribution body, wherein the water flow in unit time ranges from 16 m to 40m 3 H, the porosity range of the water flow distribution body is 6-37%, and the arrangement number range of the water flow distribution body is 3-10;
solidifying and forming the fiber layers distributed to form patterns with a three-dimensional structure through the action of water jet, wherein the pressure range of the water jet is controlled to be 30-200 bar in the forming process;
s4, cloth cover modification;
carrying out cloth cover modification on the non-woven fabric obtained after the preparation in the step S3;
(1) Removing the messy hairiness on the surface of the fiber layer, thereby obtaining a non-woven fabric with a smooth surface, and using a pressurizing method or a deweighting process;
(2) The pressurizing process is to increase superfine water jet penetrating technology in the modification process, control the pressure range of the superfine water jet to 10-60 bar, and enable hairiness on the surface of the fiber layer to be planted into the fiber layer and solidified, so as to reduce hairiness on the surface of the product;
(3) The reduction process is to burn off hairiness on the surface of the fiber layer by using a singeing process in the modification process, so as to reduce the hairiness on the surface of the product, and the temperature range of the surface of the copper roller is controlled to be 150-280 ℃ in the singeing process.
2. The low chip pulp composite jacquard nonwoven fabric manufactured by the manufacturing method according to claim 1, which is characterized by being composed of a plurality of fiber layers in a composite mode, wherein the fiber layers are pulp fiber layers or fiber layers A; the composite composition of a plurality of fiber layers is specifically as follows: consists of a single pulp fiber layer or consists of a pulp fiber layer and a plurality of fiber layers in a composite way; the gram weight of each fiber layer is 2-150 g/m 2 。
3. The low chip pulp composite jacquard nonwoven fabric according to claim 2, wherein the pulp fiber layer is made of any one or more of wood pulp fibers and cellulose fibers or any one or more of wood pulp fibers and chemical fibers, and the length of the cellulose fibers and the chemical fibers ranges from 3mm to 20mm;
the material of the fiber layer A is any combination of one or more of cellulose fibers and chemical fibers; and the length range of the fiber is more than or equal to 1mm.
4. The low chip pulp composite jacquard nonwoven fabric according to claim 2, wherein said fiber layer a is an ultra-short fiber layer or a chopped fiber layer or a continuous filament fiber layer; the material of the ultra-short fiber layer is one or a combination of more of cotton fiber, fibrilia, viscose fiber, lyocell fiber, terylene fiber, polypropylene fiber, polyethylene fiber, carbon fiber, stainless steel fiber and the like;
the chopped fiber layer is made of one or more of cotton fiber, fibrilia, viscose fiber, lyocell fiber, cuprammonium fiber, acetate fiber, polyester fiber, polypropylene fiber, polyethylene fiber, nylon fiber, polytetrafluoroethylene fiber, carbon fiber, stainless steel fiber and the like;
the continuous filament fiber layer is made of one or a combination of more of viscose fiber, polyester fiber, polypropylene fiber, polyethylene fiber, nylon fiber, polytetrafluoroethylene fiber and the like.
5. The low chip pulp composite jacquard nonwoven fabric as claimed in claim 4, wherein the ultra-short fiber layer is made of ultra-short fibers with the fiber length of 1-15 mm;
the chopped fiber layer is formed by using chopped fibers with the fiber length of 20-76 mm as materials;
the continuous filament fiber layer is formed by taking continuous filament fibers with the fiber length of more than or equal to 100mm as materials.
6. The low chip pulp composite jacquard nonwoven fabric according to claim 5, wherein the pulp fiber layer is 10-100% of the total gram weight of the nonwoven fabric, and the fiber layer a is 0-90% of the total gram weight of the nonwoven fabric.
7. The low chip pulp composite jacquard nonwoven fabric according to claim 6, wherein one or both sides of the nonwoven fabric have multi-dimensional three-dimensional patterns, the patterns comprising a plurality of elements such as lines and dots having different angles, different lengths, different thicknesses, different heights, and combinations thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010889870.4A CN111876911B (en) | 2020-08-28 | 2020-08-28 | Low-chip pulp composite jacquard non-woven fabric and manufacturing method thereof |
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