CN114214845A - Preparation process and equipment of environment-friendly suede leather base cloth - Google Patents

Preparation process and equipment of environment-friendly suede leather base cloth Download PDF

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Publication number
CN114214845A
CN114214845A CN202111320475.5A CN202111320475A CN114214845A CN 114214845 A CN114214845 A CN 114214845A CN 202111320475 A CN202111320475 A CN 202111320475A CN 114214845 A CN114214845 A CN 114214845A
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pulp
fabric
layer
leather base
base cloth
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CN114214845B (en
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王习文
商子奇
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0006—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using woven fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/042—Acrylic polymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2213/00—Others characteristics
    • D06N2213/02—All layers being of the same kind of material, e.g. all layers being of polyolefins, all layers being of polyesters

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The invention discloses a preparation process and equipment of environment-friendly suede leather base cloth, and relates to the technical field of leather, wherein the preparation process of the environment-friendly suede leather base cloth comprises the following steps: s1, dispersing the superfine fibers in water to obtain a suspension, adding a dispersing agent to stir to obtain slurry, and storing the slurry in a material tower; s2, enabling the fabric to pass through a unreeling frame and the middle of a pulp flowing box, dividing the inside of the pulp flowing box into an upper flow pulp layer and a lower flow pulp layer which are distributed up and down by the fabric, distributing pulp to the upper flow pulp layer and the lower flow pulp layer inside the pulp flowing box by the pulp in a material tower through a radial pulp distributor, spreading the distributed pulp on the upper surface and the lower surface of the fabric, and enabling the fabric to be mixed with the upper layer pulp and the lower layer pulp at the lip of the pulp flowing box to net on the fabric to form the leather base cloth of the pulp-base cloth-pulp three-layer material; and S3, carrying out dewatering operation, spunlace operation, squeezing dewatering operation and drying operation on the leather base cloth, and then carrying out rolling operation.

Description

Preparation process and equipment of environment-friendly suede leather base cloth
Technical Field
The invention relates to the technical field of leather, in particular to a preparation process of environment-friendly suede leather base cloth and preparation equipment of the environment-friendly suede leather base cloth.
Background
Artificial leather is generally composed of a base fabric and a top fabric, wherein the base fabric is closely related to the mechanical strength of the base fabric. The performance of the traditional leather base cloth can not meet the requirement of the market on products gradually, and various novel base cloth layers are endless for preparing environment-friendly base cloth materials with higher mechanical properties. Among them, wet nonwoven spunlace composite technology is a new technology that has recently appeared. The technology is mainly used for preparing suede base cloth at present, but the technology has the defects of complicated steps, poor solid-phase bonding between fibers, obvious layering boundary and the like, and the quality of a product is difficult to ensure.
Chinese patent document CN107953497B discloses a method for preparing a completely environment-friendly base fabric, which comprises the steps of firstly adopting a paper-making method, utilizing two flow boxes to make polyester fibers into two layers of polyester paper, then pasting the two layers of polyester paper on two sides of the base fabric through a composite roller, and then carrying out subsequent section treatment. Finally obtaining the three-layer composite material, wherein the middle part is a fabric layer, and two sides of the fabric are polyester paper. The method is a typical multilayer composite method, a plurality of head boxes are needed to form nets respectively, and finally, each layer of net is formed in a laminated and composite mode. Has the defects of complicated steps, incapability of one-step forming, poor and easy combination among solid-phase layers and the like.
Chinese patent document CN110258022A discloses a preparation process of high-physical-property cowhide base fabric, which adopts a multi-net multi-layer composite process, and adopts a lapping machine to sequentially carry out warp-wise cross lapping of a first layer, weft-wise cross lapping of a second layer and straight lapping of a third layer in a lapping process in a chemical fiber net lapping process. The method improves the mechanical properties of each direction of the base cloth by changing the lapping direction of each layer, but the working procedure is more complicated and the boundary of each layer is obvious.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the invention provides a preparation process of environment-friendly suede leather base cloth, which solves the defects of poor solid-phase bonding between fibers, obvious layering boundary, easiness in layering and foaming and the like caused by the traditional multi-net multi-layer composite mode for preparing artificial leather base cloth in China and ensures the forming quality of the leather base cloth.
The embodiment of the invention also provides preparation equipment of the environment-friendly suede leather base cloth.
According to an embodiment of the first aspect of the present invention, there is provided a process for preparing an environment-friendly suede leather base fabric, including the steps of:
s1, dispersing the superfine fibers in water to obtain a suspension, adding a dispersing agent, stirring to obtain slurry, and storing the slurry in a material tower;
s2, enabling a fabric to pass through a unreeling frame and the middle of a pulp box, dividing the inside of the pulp box into an upper flow pulp layer and a lower flow pulp layer which are distributed up and down by the fabric, distributing pulp to the upper flow pulp layer and the lower flow pulp layer inside the pulp box through a radial pulp distributor, spreading the distributed pulp on the upper surface and the lower surface of the fabric, and enabling the fabric to be mixed with the upper layer pulp and the lower layer pulp at the lip of the pulp box to mesh on the net to form the leather base cloth of the pulp-base cloth-pulp three-layer material;
and S3, carrying out dewatering operation, spunlace operation, squeezing dewatering operation and drying operation on the leather base cloth, and then carrying out rolling operation.
The preparation process of the environment-friendly suede leather base cloth at least has the following beneficial effects: when the fabric passes through the pulp box, the inside of the pulp box is divided into an upper flow pulp layer and a lower flow pulp layer which are distributed up and down, the pulp is distributed to the upper flow pulp layer and the lower flow pulp layer by the radial pulp distributor, and the fabric is mixed with the upper layer pulp and the lower layer pulp at the lip of the pulp box to be meshed with the net to form the leather base fabric of the three-layer material of the pulp-base fabric-pulp. The leather base cloth is formed by compounding three layers of materials of sizing agent, fabric and sizing agent, thereby solving the defects of poor solid-phase combination between fibers, obvious layering boundary, easy layering and foaming and the like caused by adopting a multi-net multi-layer compounding mode to prepare the artificial leather base cloth in the past in China and ensuring the forming quality of the leather base cloth; after three materials in the leather base cloth are meshed together, the three materials are subjected to squeezing dehydration, spunlace, drying and rolling operation, and then are subjected to slitting operation, so that the step of multilayer lapping and net folding is omitted, the operation is simple and easy, and the yield is greatly improved; the wet process is adopted to prepare the leather base cloth, so that the yield is improved, and the sanitary performance of the product is improved. By adopting the preparation process, the product has excellent physical properties and can be used as leather base cloth for shoe and clothes veneers, automobile interiors and the like.
According to an embodiment of the first aspect of the present invention, the ultrafine fibers are one or more of hide powder, chemical fibers, nanofibers, or viscose fibers.
According to an embodiment of the first aspect of the present invention, in the step S1, the concentration of the ultra fine fibers in the slurry is 1-3%.
According to an embodiment of the first aspect of the present invention, in step S1, the dispersant is added in an amount of 0.2% to 0.5% of the suspension, and the dispersant is polyethylene oxide or polyacrylamide.
According to an embodiment of the first aspect of the present invention, in step S2, the fabric passes through the headbox, the headbox is provided with a sealing gasket at the fabric inlet, and the upper and lower flows of stock can apply the prepared stock to the fabric in between by means of water pressure.
According to an embodiment of the first aspect of the present invention, in the step S2, the concentration of the ultrafine fiber on the web in the slurry is 0.1 to 0.6%.
According to an embodiment of the first aspect of the present invention, in step S2, the headbox is a fly-type inclined-wire headbox having a plurality of fly sheets therein, and the slurry distribution on the upper and lower sides of the fabric is adjusted by adjusting the positions of the fly sheets and the fabric.
According to an embodiment of the first aspect of the present invention, in the step S2, the fabric is woven fabric or woven fabric, and the grammage of the fabric is 120-250g/m2The density of the warp threads is 65-140 threads/inch, and the density of the weft threads is 60-100 threads/inch; the gram weight of the leather base cloth is 250-600g/m2。
According to an embodiment of the first aspect of the present invention, in step S3, the dewatering operation is six stages of vacuum dewatering, and the vacuum degree of each stage of vacuum dewatering is adjustable; the water jet punching operation comprises a forward punching process, a reverse punching process and an edge punching process, wherein the water jet punching pressure of the water jet punching operation is 300-350 kg.
According to an embodiment of a second aspect of the present invention, there is provided an apparatus for manufacturing an environment-friendly suede leather base fabric, including a head box; the fabric penetrates through the middle of the head box and divides the inside of the head box into an upper flow pulp layer and a lower flow pulp layer which are distributed up and down; a radial spreader for distributing the slurry to the upper and lower slurry layers inside the headbox to spread the distributed slurry on both the upper and lower sides of the fabric to form the fabric into a leather base of slurry-base-slurry tri-layer material; and a mesh conveyor belt for conveying the leather base cloth.
Above-mentioned preparation equipment of environment-friendly chamois leather base cloth has following beneficial effect at least: by designing the flow box, when a fabric passes through the flow box, the inside of the flow box is divided into an upper flow pulp layer and a lower flow pulp layer which are distributed up and down, pulp is distributed to the upper flow pulp layer and the lower flow pulp layer by the radial pulp distributor, and the fabric is mixed with the upper layer pulp and the lower layer pulp at the lip of the flow box to be meshed with the net to form the leather base fabric of the three-layer material of the pulp-base fabric-pulp. The leather base cloth is formed by compounding three layers of materials of sizing agent, fabric and sizing agent, thereby solving the defects of poor solid phase combination between fibers, obvious layering boundary, easy layering and foaming and the like caused by adopting a multi-net multi-layer compounding mode to prepare the artificial leather base cloth in the past in China and ensuring the forming quality of the leather base cloth.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, a device for manufacturing an environment-friendly suede leather base fabric according to an embodiment of the present invention is described, and the device for manufacturing an environment-friendly suede leather base fabric may be applied to a process for manufacturing an environment-friendly suede leather base fabric to manufacture an environment-friendly suede leather base fabric.
The apparatus for manufacturing the environment-friendly suede leather base fabric includes a head box 20, a fabric 32, a radial slurry distributor 11, and a mesh conveyor belt 43. Wherein the fabric 32 passes through the middle of the headbox 20, the fabric 32 divides the inside of the headbox 20 into an upper layer flow and a lower layer flow, which are distributed one above the other, and the radial spreader 11 is used to distribute the slurry to the upper layer flow 21 and the lower layer flow 22 inside the headbox to spread the distributed slurry on both the upper and lower sides of the fabric 32, thereby forming the fabric 32 into a leather base fabric 33 of a slurry-base fabric-slurry three-layer material.
The mesh conveyor belt 43 is used to convey the leather base cloth 33. Further, the web conveying belt 43 is fitted between the driving roller 41 and the driven roller 42 and is driven to rotate by the driving roller 41.
Specifically, the headbox 20 is provided with two fiber inlets, namely a first fiber inlet 25 and a second fiber inlet 26, wherein the first fiber inlet 25 is communicated with the upper layer flow pulp layer 21, and the second fiber inlet 26 is communicated with the lower layer flow pulp layer 22. The radial paddle 11 delivers slurry to a first fiber inlet 25 and a second fiber inlet 26.
In addition, the preparation equipment of the environment-friendly suede leather base cloth further comprises a dehydrator 51 for performing dehydration operation on the leather base cloth, a spunlace machine 52 for performing spunlace operation on the leather base cloth, a pressing dehydrator for pressing and dehydrating the leather base cloth, a drying cylinder for drying the leather base cloth, and a winding machine for winding the leather base cloth, wherein the pressing dehydrator, the drying cylinder and the winding machine are not shown in the drawing.
The following describes a process for preparing an environment-friendly suede leather base fabric according to an embodiment of the present invention, including the steps of:
s1, dispersing the superfine fiber in water to obtain a suspension, adding a dispersing agent, stirring to obtain slurry, and storing the slurry in a material tower.
The superfine fiber is one or more of hide powder, chemical fiber, nanofiber or viscose fiber. The specific requirements of the superfine fiber are as follows: the skin powder is obtained by crushing dermis and passing through a 60-200 mesh sieve; the chemical fiber is PET, PP or PA, the diameter is 0.06-0.2dtex, and the length is 4-8 mm; the diameter of the nano cellulose fiber is 100-500 nm; the diameter of the viscose fiber is 0.1-0.2dtex, and the length is 4-6 mm.
The concentration of the superfine fibers in the slurry is 1-3%. The addition amount of the dispersant is 0.2-0.5% of the suspension, and the dispersant is polyethylene oxide (PEO) or Polyacrylamide (PAM).
S2, the fabric 32 passes through the unreeling rack 31 and penetrates through the middle of the headbox 20, the fabric 32 divides the inside of the headbox 20 into an upper laminar flow pulp layer 21 and a lower laminar flow pulp layer 22 which are distributed up and down, the pulp in the stock tower is distributed to the upper laminar flow pulp layer 21 and the lower laminar flow pulp layer 22 inside the headbox through the radial pulp distributor 11, the distributed pulp is spread on the upper surface and the lower surface of the fabric 32, and the fabric is mixed with the upper pulp layer and the lower pulp layer at the lip 24 of the headbox 20 to be meshed with the net to form the leather base cloth 33 made of the pulp-base cloth-pulp three-layer material.
The fabric 32 passes through the headbox 20, the headbox 20 is provided with a sealing gasket 27 at the fabric inlet, and the upper and lower flows 21, 22 are able to apply the prepared stock to the fabric in between by means of water pressure.
Wherein the concentration of the superfine fiber in the sizing agent is 0.1-0.6%.
In the present invention, the fabric 32 is woven fabric or woven fabric, and the gram weight of the fabric 32 is 120-250g/m2The density of the warp threads is 65-140 threads/inch, and the density of the weft threads is 60-100 threads/inch. The gram weight of the leather base cloth which is mixed with the sizing agent and is meshed with the net is 250-600g/m2。
Specifically, the headbox 20 is a slice-type inclined wire headbox, wherein the headbox 20 has a plurality of slices 23 therein, and the distribution of slurry on both the top and bottom sides of the fabric 32 is adjusted by adjusting the positions of the slices 23 and the fabric 32.
S3, the leather base fabric 33 is subjected to a dewatering operation, a water-jet entangling operation, a press dewatering operation, and a drying operation, and then wound up. And cutting the rolled leather base cloth to obtain a final product.
Specifically, the dehydration operation is six-stage vacuum dehydration, and the vacuum degree of each stage of vacuum dehydration can be adjusted; the water jet punching operation comprises a forward punching process, a reverse punching process and an edge punching process, wherein the water jet punching pressure of the water jet punching operation is 300-350 kg.
It can be understood that, in the process for preparing the environment-friendly suede leather base cloth, when the fabric 32 passes through the head box 20, the inside of the head box 20 is divided into the upper layer flow pulp layer 21 and the lower layer flow pulp layer 22 which are distributed up and down, the radial pulp distributor 11 distributes the pulp to the upper layer flow pulp layer 21 and the lower layer flow pulp layer 22, and the fabric 32 is mixed with the upper layer pulp layer and the lower layer pulp layer at the lip 24 of the head box 20 to be meshed with the upper layer pulp layer and the lower layer pulp layer, so as to form the leather base cloth 33 of the pulp-base cloth-pulp three-layer material. In the closed head box 20, the slurry can be uniformly attached to two sides of the fabric by the hydraulic action and is finally ejected from the lip and enters the web along with the fabric, the slurry layer and the fabric layer are compounded, dried and formed together, and the fabric is transferred to a spunlace machine for deep processing after entering a pre-needling device for entanglement.
The leather base cloth is formed by compounding three layers of materials of sizing agent, fabric and sizing agent, thereby solving the defects of poor solid-phase combination between fibers, obvious layering boundary, easy layering and foaming and the like caused by adopting a multi-net multi-layer compounding mode to prepare the artificial leather base cloth in the past in China and ensuring the forming quality of the leather base cloth; after three materials in the leather base cloth are meshed together, the three materials are subjected to squeezing dehydration, spunlace, drying and rolling operation, and then are subjected to slitting operation, so that the step of multilayer lapping and net folding is omitted, the operation is simple and easy, and the yield is greatly improved; the wet process for preparing leather base cloth has the technological characteristics of one-time multilayer fiber forming and multiple fiber mixed forming in the web forming process, is suitable for the composite forming of synthetic fibers, plant fibers, mineral fibers, metal fibers and other mixed slurry, can be used for producing wet process non-woven cloth products with different functions and purposes, and improves the sanitary performance of the products while improving the yield. By adopting the preparation process, the product has excellent physical properties and can be used as leather base cloth for shoe and clothes veneers, automobile interiors and the like.
Example 1:
a preparation process of environment-friendly suede leather base cloth comprises the following steps:
s1, adding polyester fibers with the diameter of 0.1dtex and the length of 5mm into a stirrer and fully dispersing to prepare superfine fiber suspension with the fiber concentration of 3%; adding 0.2% of PAM dispersant, fully stirring to prepare slurry, namely the terylene suspension, and storing the slurry in a material tower.
S2, as the fabric of the base fabric, the polyester woven fabric is used in this embodiment. Preparing polyester woven fabric on an unreeling rack, wherein the gram weight of the polyester woven fabric is 120g/m2The warp density is 110 pieces/inch, the weft density is 90 pieces/inch, one end of the terylene woven fabric penetrates through a pulp flow box, the inside of the pulp flow box is divided into an upper layer and a lower layer, the ratio of the number of the floating pieces of the upper layer pulp layer to the number of the floating pieces of the lower layer pulp layer is 2:3, the terylene woven fabric is led out from a lip of the pulp flow box to be meshed with the net, the lip of the terylene woven fabric is divided into the upper layer and the lower layer, and the outlet flow ratio of the upper layer and the lower layer is 2: 3.
Wherein a sealing gasket at the fabric inlet needs to be fixed to ensure that the inside of the headbox is in a sealed state.
The pulp is guided into a pulp flowing box through a radial pulp distributor, the net-feeding concentration is controlled to be 0.6%, a net conveyor belt drives the terylene woven fabric to move forward, the pulp is uniformly coated on two sides of the terylene woven fabric under the action of water power, the terylene woven fabric is arranged in the middle, the upper side and the lower side are provided with the pulp, three layers of materials are obtained, and the leather base fabric of the pulp-base fabric-pulp three-layer material is formed.
S3, carrying out dehydration operation and composite forming on the leather base cloth of the slurry-base cloth-slurry three-layer material, carrying out spunlace operation together with the leather base cloth, carrying out forward needling, reverse needling and edge trimming, wherein the spunlace pressure is 300kg, carrying out squeezing dehydration operation, then carrying out drying operation on the leather base cloth in a drying cylinder, carrying out rolling operation, and finally carrying out slitting operation to obtain the finished product of the environment-friendly suede leather base cloth.
The gram weight of the finished product is 250g/m2Wherein the gram weight of the upper layer facing is 52g, and the gram weight of the lower layer facing is 78g/m2。
Example 2:
a manufacturing process of environment-friendly suede leather base cloth comprises the following steps:
s1, adding polyester fibers and nylon fibers (wherein the nylon fibers account for 20%) with the diameter of 0.1dtex and the length of 6mm into a stirrer and fully dispersing to prepare superfine fiber suspension with the fiber concentration of 3%; adding 0.3 percent of PAM dispersant, fully stirring to prepare slurry, namely superfine fiber suspension, and storing the slurry in a material tower.
S2, as the fabric of the base fabric, the polyester woven fabric is used in this embodiment. Preparing polyester woven fabric on an unreeling rack, wherein the gram weight of the polyester woven fabric is 150g/m2The warp density is 110 pieces/inch, the weft density is 90 pieces/inch, one end of the terylene woven fabric penetrates through a head box, the head box is divided into an upper layer and a lower layer, and then the upper layer and the lower layer are led out through a lip to net.
Wherein a sealing gasket at the fabric inlet needs to be fixed to ensure that the inside of the headbox is in a sealed state.
The pulp is guided into a pulp flowing box through a radial pulp distributor, the net-feeding concentration is controlled to be 0.6%, a net conveyor belt drives the terylene woven fabric to move forward, the pulp is uniformly coated on two sides of the terylene woven fabric under the action of water power, the terylene woven fabric is arranged in the middle, the upper side and the lower side are provided with the pulp, three layers of materials are obtained, and the leather base fabric of the pulp-base fabric-pulp three-layer material is formed.
S3, carrying out dehydration operation and composite forming on the leather base cloth of the slurry-base cloth-slurry three-layer material, carrying out spunlace operation together with the leather base cloth, carrying out forward needling, reverse needling and trimming needling, wherein the spunlace pressure is 315kg, carrying out squeezing dehydration operation, then carrying out drying operation on the leather base cloth in a drying cylinder, carrying out rolling operation, and finally carrying out slitting operation to obtain the finished product of the environment-friendly suede leather base cloth.
Example 3
A manufacturing process of environment-friendly suede leather base cloth comprises the following steps:
s1, adding polyester fibers and nylon fibers (wherein the nylon fibers account for 30 percent) with the diameter of 0.15dtex and the length of 8mm into a stirrer, and fully dispersing the fibers into water to prepare superfine fiber suspension with the fiber concentration of 3 percent; adding 0.3 percent of PAM dispersant, fully stirring to prepare slurry, namely superfine fiber suspension, and storing in a material tower.
S2, as the fabric of the base fabric, the polyester woven fabric is used in this embodiment. Preparing polyester woven fabric on an unreeling rack, wherein the gram weight is 180g/m2The warp density is 110 pieces/inch, the weft density is 90 pieces/inch, one end of the terylene woven fabric penetrates through a head box, the head box is divided into an upper layer and a lower layer, and then the upper layer and the lower layer are led out through a lip to net.
Wherein a sealing gasket at the fabric inlet needs to be fixed to ensure that the inside of the headbox is in a sealed state.
The pulp is guided into a pulp flowing box through a radial pulp distributor, the net-feeding concentration is controlled to be 0.6%, a net conveyor belt drives the terylene woven fabric to move forward, the pulp is uniformly coated on two sides of the terylene woven fabric under the action of water power, the terylene woven fabric is arranged in the middle, the upper side and the lower side are provided with the pulp, three layers of materials are obtained, and the leather base fabric of the pulp-base fabric-pulp three-layer material is formed.
S3, carrying out dehydration operation and composite forming on the leather base cloth of the slurry-base cloth-slurry three-layer material, carrying out spunlace operation together with the leather base cloth, carrying out forward needling, reverse needling and trimming needling, wherein the spunlace pressure is 350kg, carrying out squeezing dehydration operation, then carrying out drying operation on the leather base cloth in a drying cylinder, carrying out rolling operation, and finally carrying out slitting operation to obtain the finished product of the environment-friendly suede leather base cloth.
Comparative examples of the above examples are also shown below, in particular as follows:
comparative example 1
As described in example 1, except that the water-punching pressure was 200kg in step S3.
Comparative example 2
Except that the length of the ultra fine fiber was 12mm in step S1, as described in example 2.
Comparative example 3
As described in example 3, except that the concentration of the ultrafine fibers in the slurry was 4% in step S1.
Each performance test was conducted on examples 1 to 3 and comparative examples 1 to 3, and the results are shown in the following tables.
Example 1 Example 2 Example 3 Comparative example 1 Comparative example 2 Comparative example 3
Gram weight g/m2 250 300 380 225 250 400
Transverse tear Strength N 37 41 44 31 33 37
Longitudinal tear strength N 35 38 41 27 31 36
Transverse rupture strength N 350 435 540 246 304 460
Longitudinal breaking strength N 465 570 680 303 430 565
Uniformity Superior food Superior food Superior food Good wine Difference (D) Difference (D)
As can be seen by comparing the performance indexes of examples 1-3 with that of comparative example 1, too low a hydroentangling pressure results in a product with a lower gram weight, lower breaking strength and tear strength, lower uniformity and easy delamination.
As can be seen from the comparison of the performance indexes of examples 1-3 and comparative example 2, the improper fiber length of the superfine fiber results in the product with a smaller gram weight, the reduction of the breaking strength, the tearing strength and the uniformity, and the difficulty in forming.
Comparing the performance indexes of examples 1 to 3 and comparative example 3, it can be seen that when the concentration of the ultrafine fibers in the slurry is too high, i.e., the concentration of the fiber suspension is too high, the leather base fabric is increased only in terms of grammage, and other indexes are all decreased and the hygienic property is poor.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A preparation process of environment-friendly suede leather base cloth is characterized by comprising the following steps:
s1, dispersing the superfine fibers in water to obtain a suspension, adding a dispersing agent, stirring to obtain slurry, and storing the slurry in a material tower;
s2, enabling a fabric to pass through a unreeling frame and the middle of a pulp box, dividing the inside of the pulp box into an upper flow pulp layer and a lower flow pulp layer which are distributed up and down by the fabric, distributing pulp to the upper flow pulp layer and the lower flow pulp layer inside the pulp box through a radial pulp distributor, spreading the distributed pulp on the upper surface and the lower surface of the fabric, and enabling the fabric to be mixed with the upper layer pulp and the lower layer pulp at the lip of the pulp box to mesh on the net to form the leather base cloth of the pulp-base cloth-pulp three-layer material;
and S3, carrying out dewatering operation, spunlace operation, squeezing dewatering operation and drying operation on the leather base cloth, and then carrying out rolling operation.
2. The process for preparing an environment-friendly suede leather base fabric according to claim 1, wherein: the superfine fiber is one or more of hide powder, chemical fiber, nanofiber or viscose.
3. The process for preparing an environment-friendly suede leather base fabric according to claim 1, wherein: in the step S1, the concentration of the ultrafine fibers in the slurry is 1 to 3%.
4. The process for preparing an environment-friendly suede leather base fabric according to claim 1, wherein: in the step S1, the addition amount of the dispersant is 0.2% to 0.5% of the suspension, and the dispersant is polyethylene oxide or polyacrylamide.
5. The process for preparing an environment-friendly suede leather base fabric according to any one of claims 1 to 4, wherein: in the step S2, the fabric passes through the head box, a sealing gasket is disposed at an inlet of the fabric, and the upper layer flow pulp layer and the lower layer flow pulp layer can coat the prepared pulp on the fabric in the middle through water pressure.
6. The process for preparing an environment-friendly suede leather base fabric according to claim 5, wherein: in the step S2, the concentration of the superfine fiber on the net in the slurry is 0.1-0.6%.
7. The process for preparing an environment-friendly suede leather base fabric according to claim 5, wherein: in step S2, the headbox is a flap-type inclined-wire headbox, and the headbox has a plurality of flaps therein, and the distribution of the slurry on the upper and lower surfaces of the fabric is adjusted by adjusting the positions of the flaps and the fabric.
8. The process for preparing an environment-friendly suede leather base fabric according to claim 5, wherein: in the step S2, the fabric is woven fabric or woven fabric, and the grammage of the fabric is 120-250g/m2The density of the warp threads is 65-140 threads/inch, and the density of the weft threads is 60-100 threads/inch; the gram weight of the leather base cloth is 250-600g/m2。
9. The process for preparing an environment-friendly suede leather base fabric according to any one of claims 1 to 4, wherein: in the step S3, the dehydration operation is six-stage vacuum dehydration, and the vacuum degree of each stage of vacuum dehydration is adjustable; the water jet punching operation comprises a forward punching process, a reverse punching process and an edge punching process, wherein the water jet punching pressure of the water jet punching operation is 300-350 kg.
10. The utility model provides a preparation equipment of environment-friendly chamois leather base cloth which characterized in that: comprises that
A head box;
the fabric penetrates through the middle of the head box and divides the inside of the head box into an upper flow pulp layer and a lower flow pulp layer which are distributed up and down;
a radial spreader for distributing the slurry to the upper and lower slurry layers inside the headbox to spread the distributed slurry on both the upper and lower sides of the fabric to form the fabric into a leather base of slurry-base-slurry tri-layer material; and
and the net conveying belt is used for conveying the leather base cloth.
CN202111320475.5A 2021-11-09 2021-11-09 Preparation process and equipment of environment-friendly suede leather base cloth Active CN114214845B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1396188A (en) * 1971-12-07 1975-06-04 Ockhardt K Process of producing leather fibre materials
CN111455677A (en) * 2020-04-03 2020-07-28 广东海纳新材料科技有限公司 Preparation method of bio-based artificial leather with high air permeability
CN111572163A (en) * 2020-05-27 2020-08-25 临沂昱洁新材料有限公司 Preparation method of environment-friendly leather base cloth

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1396188A (en) * 1971-12-07 1975-06-04 Ockhardt K Process of producing leather fibre materials
CN111455677A (en) * 2020-04-03 2020-07-28 广东海纳新材料科技有限公司 Preparation method of bio-based artificial leather with high air permeability
CN111572163A (en) * 2020-05-27 2020-08-25 临沂昱洁新材料有限公司 Preparation method of environment-friendly leather base cloth

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