CN114541032A - Melt spinning cross lapping multilayer blended non-woven material and preparation method thereof - Google Patents
Melt spinning cross lapping multilayer blended non-woven material and preparation method thereof Download PDFInfo
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- CN114541032A CN114541032A CN202210250567.9A CN202210250567A CN114541032A CN 114541032 A CN114541032 A CN 114541032A CN 202210250567 A CN202210250567 A CN 202210250567A CN 114541032 A CN114541032 A CN 114541032A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
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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
- D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—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 by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
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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
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention discloses a melt spinning cross lapping multilayer blending non-woven material and a preparation method thereof, relating to the technical field of disposable hygienic products. The preparation method comprises the steps of outputting the melt-blown fibers, the wood pulp fibers and the super absorbent resin powder to a receiving net curtain through a spinneret plate which swings transversely and reciprocally according to a preset rule, enabling the wood pulp fibers and the melt-blown fibers to be interlaced and bonded under the swinging action to form a composite net web, enabling the super absorbent resin powder to be uniformly dispersed on the surface layer and inner holes of the composite net web in the forming process of the composite net web, and enabling fibers in the composite fibers and composite fiber layers to be compounded through the hot melting bonding action of the molten fibers, so that the wood pulp fibers and the super absorbent resin powder are uniformly distributed on a composite surface structure, the technical problem that the composite material of the existing disposable sanitary product is prone to generate performance faults between the composite material layers is solved, and the technical effect of improving the performance stability of the disposable composite sanitary material is achieved.
Description
Technical Field
The invention relates to the technical field of disposable hygienic products, in particular to a melt spinning cross lapping multilayer blended non-woven material and a preparation method thereof.
Background
Disposable hygienic products are mainly classified into four major categories: the disposable diaper comprises a baby diaper, a feminine hygiene product, a wet tissue and an adult incontinence product, wherein the baby diaper is taken as the disposable hygiene product, accounts for 45% of the retail market scale of the disposable hygiene product, and the average growth speed of the disposable hygiene product in the whole world is directly influenced by the growth trend due to the high overall proportion of the baby diaper. The wet tissue is the third market of disposable sanitary products in the world, and the fine categories of the wet tissue are numerous, such as household cleaning wet tissue, baby wet tissue, wet toilet paper and the like. From the regional perspective, the consumer in developed regions has more diversified demands for the fine categories of wet tissues, and the consumer's acceptance and payment capability of various categories of products are reflected. The baby wet tissue types are higher than the first type and the household cleaning wet tissue types are higher than the second type. Baby wipes are among the products that are just needed for developing areas.
The existing disposable sanitary article has the advantages that other performances are improved through process improvement on the basis of the original moisture absorption performance, for example, CN201721280381.9 discloses an integrally formed light and thin paper diaper capable of absorbing and storing, and the diaper is characterized by high water absorption capacity, difficulty in lump formation or fault formation after water absorption and no outward leakage. The patent mainly provides a positioning device on an elastic layer, and the positioning device is fixed on a cross point of a transverse elastic fiber and a vertical elastic fiber; the lower layer of the core body is provided with a surface layer, a core body and a bottom absorbing and storing bearing layer, and a plurality of parallel and evenly spaced flow guide passages are arranged. The utility model belongs to the technical field of adding an additional structure in a traditional core layer to change the performance; CN202110274286.2 discloses a MOFs modified ECTFE wood pulp composite non-woven material and a production process and application thereof, which mainly relate to the technical field of spunlace non-woven materials, and the production process of the MOFs modified ECTFE wood pulp composite non-woven material comprises the following steps: carrying out spunlace and drying on the wood pulp non-woven fabric and the ECTFE non-woven fabric to obtain a composite non-woven fabric; mixing cobalt nitrate hexahydrate, terephthalic acid and DMF (dimethyl formamide), and uniformly stirring to obtain a mixed solution to be synthesized of MOFs; and mixing, heating and stirring the composite non-woven fabric and the mixed solution to be synthesized of the MOFs, and then drying. The invention relates to a composite non-woven material, which is characterized in that the hydrophilicity of the composite non-woven material is improved, the high-efficiency oil absorption hydrophilicity is realized, oil stains attached to the surface of the composite non-woven material can be easily removed, and the composite non-woven material can be repeatedly used.
In the process of implementing the invention, the inventor finds that the related art has at least the following problems:
the existing preparation process of the disposable sanitary product mainly realizes the improvement of the material performance of the disposable sanitary product through the addition of an additional structure and a chemical reagent, and a composite surface between material layers of the composite material is easy to generate performance faults, so that the actual use performance of a finished product is reduced, and the use experience of a user is influenced.
Disclosure of Invention
The invention mainly aims to provide a melt spinning cross lapping multilayer blending non-woven material and a preparation method thereof, which are used for solving the technical problem that the composite material of the existing disposable sanitary product is easy to generate performance faults between layers of the composite material, and achieving the technical effect of improving the performance stability of the disposable composite sanitary material. The technical scheme of the invention is as follows:
according to a first aspect of embodiments of the present invention, there is provided a method of making a melt spun cross-lapped multi-layer blended nonwoven material, characterized by the steps of:
after being subjected to feeding, melt extrusion and metering treatment, polymer slices enter spinneret orifices of a spinneret plate which transversely swings back and forth according to a preset rule to carry out spinneret so as to obtain melt-blown fibers, and the melt-blown fibers are received by a receiving net curtain with the longitudinal conveying direction;
outputting wood pulp fibers through a lapping port of the spinneret plate, and simultaneously outputting super absorbent resin powder through an auxiliary material port on the peripheral side of the spinneret plate, so that the wood pulp fibers, the super absorbent resin powder and the melt-blown fibers are transversely and reciprocally swung and then fall into the receiving net curtain, the wood pulp fibers and the melt-blown fibers on the receiving net curtain are interlaced and entangled and bonded to form a composite fiber net, and the super absorbent resin powder is uniformly dispersed on the surface layer and inner pores of the composite fiber net in the process of forming the composite fiber net;
and repeating the preparation steps of the composite fiber web by taking the surface layer of the composite fiber web on the receiving net curtain as a receiving surface until a melt spinning cross lapping multi-layer blending non-woven material obtained by superposing a preset number of composite fiber webs is formed, wherein the composite fiber webs of all layers in the melt spinning cross lapping multi-layer blending non-woven material are compounded through the hot melting bonding effect among fibers.
In a preferred embodiment, the output trajectory of the meltblown fibers, the wood pulp fibers and the superabsorbent resin material at the receiving web is in a continuous zigzag shape or a continuous S shape.
In a preferred embodiment, after at least two layers of the composite fiber webs are superposed and compounded, each open pore of the hot melt bonding surface between the composite fiber webs is closed again to form a 3D micropore, and the super absorbent resin powder positioned in each open pore is closed in the 3D micropore at the same time, so that the hot melt bonding surface of each composite fiber web of the melt spinning cross-lapping multi-layer blending non-woven material also has uniformly distributed super absorbent resin powder.
In a preferred embodiment, the output of the meltblown fibers, the wood pulp fibers and the superabsorbent resin material are independent and adjustable.
In a preferred embodiment, the fineness of the meltblown fibers is 0.1-50 μm.
In a preferred embodiment, the grammage of the meltblown fibers in the composite web is between 1 and 10 g/m2The fineness of the fiber is 0.1-50 mu m, and the number of the composite fiber webs of the melt spinning cross lapping multi-layer blending non-woven material is 2-30.
In a preferred embodiment, the number of composite webs of the melt spun crosslapped multi-layer blended nonwoven material is 14.
In a preferred embodiment, the water absorption capacity of the super absorbent resin powder is 100-800, the particle size is 0.1-2mm, and the gram weight of the super absorbent resin powder in each layer of composite fiber web is 10-100 g/m2。
In a preferred embodimentIn an embodiment, the wood pulp fibers in the composite web have a length of 0.3 to 8mm, a width of 10 to 100 μm, and a grammage of 1 to 30 g/m2。
According to a second aspect of embodiments of the present invention there is provided a melt spun cross-lapped multi-layer blended nonwoven material produced by the method of producing a melt spun cross-lapped multi-layer blended nonwoven material as described in any one of the above.
Compared with the prior art, the melt spinning cross lapping multilayer blending non-woven material and the preparation method thereof provided by the invention have the following advantages:
the invention provides a melt spinning cross lapping multilayer blending non-woven material and a preparation method thereof, which are characterized in that melt-blown fibers, wood pulp fibers and super absorbent resin powder are respectively output to a receiving net curtain through a spinneret plate which swings transversely and reciprocally according to a preset rule, the conveying direction of the receiving net curtain is longitudinal, so that the wood pulp fibers and the receiving melt-blown fibers are interlaced, entangled and bonded together under the swinging action to form a composite fiber web, the super absorbent resin powder is uniformly dispersed on the surface layer and the inner pores of the composite fiber web in the forming process of the composite fiber web, fibers in each composite fiber and layers of each composite fiber are compounded through the self hot melting bonding action of the melt fibers to obtain the melt spinning cross lapping multilayer blending non-woven material, and the wood pulp fibers and the super absorbent resin powder are uniformly distributed on the composite surface structure of the melt spinning cross lapping multilayer blending non-woven material, thereby solving the technical problem that the composite material of the existing disposable sanitary article is easy to generate performance faults between layers of the composite material and achieving the technical effect of improving the performance stability of the disposable composite sanitary material.
In addition, the invention also has the following advantages:
1. the flexibility is good. The internal fibers and the composite fiber webs of the melt spinning cross lapping multi-layer blending non-woven material provided by the invention are fused and bonded by themselves, glue bonding is not adopted to reduce the stiffness of the glue, and melt-blown fibers are thinner and longer and have very excellent softness.
2. The air permeability is good. The melt spinning cross lapping multi-layer blending non-woven material provided by the invention is not bonded by glue, the air permeability between layers of the composite fiber net is better, the contact area with skin is small, and the non-close-fitting effect is avoided.
3. The hydrophilicity and the water absorption performance are more excellent. When the melt spinning cross lapping multi-layer blending non-woven material provided by the invention is applied to the surface layer of sanitary towels, paper diapers and adult incontinence pants, as the composite surface between the composite fiber webs also has the wood pulp fibers and the SAP which are uniformly distributed, the SAP is uniformly dispersed in the integral material of the melt spinning cross lapping multi-layer blending non-woven material and can be better contacted with liquid, the water absorption performance is greatly improved, when the melt spinning cross lapping multi-layer blending non-woven material is applied to wet tissues and facial masks, the wood pulp fibers and the melt fibers are alternately wound, the contact surface with the liquid is increased, and the water absorption effect is very outstanding;
4. environmental protection, safety, low carbon and energy saving. The fiber is fused and bonded, so that the bonding by using glue is avoided, the environment-friendly effect is achieved, and the contact with the skin is safer; the integrated material reduces the processes, not only reduces the equipment cost, but also reduces the packaging, transportation and labor costs, and is more energy-saving and low-carbon.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a process flow diagram illustrating a method of making a melt spun cross-lapped multi-layer blended nonwoven material according to an exemplary embodiment.
FIG. 2 is a process flow diagram illustrating a method of making a melt spun cross-lapped multi-layer blended nonwoven material according to an exemplary embodiment.
FIG. 3 is a schematic illustration of a melt spun cross-lapped multi-layer blended nonwoven material shown according to an exemplary embodiment.
FIG. 4 is a schematic diagram of the continuous zigzag output trajectory of the components provided by the present invention on the receiving web.
FIG. 5 is a schematic diagram of the continuous "S" shaped output trajectory of components on a receiving web according to the present invention.
FIG. 6 is a schematic microscopic electron micrograph of a melt spun crosslapped multilayer blended nonwoven material prepared according to example 1 of the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
The existing composite method of the composite material of the disposable sanitary product is usually to prepare the same or different material layers separately and then compound the material layers in a chemical adhesive mode, and meanwhile, in order to improve the performance of the composite surface of each material layer, chemical materials can be added in the compounding process so as to reduce the influence of the composite surface on the overall performance of the composite material.
In the process of implementing the invention, the inventor finds that the composite material prepared by the traditional preparation method of the composite material for disposable sanitary products has the characteristics that the composite surface between the composite material layers is easily affected by adhesives such as chemical viscose, so that the material structure of the composite material at the position of the composite surface is greatly different from the material structure of other parts, thereby forming a performance fault. A schematic representation of a conventional disposable hygiene article composite material can be seen in fig. 1. In fig. 1, a composite surface a is formed between each composite material layer, and the material structure of the composite material at the position of the composite surface a is obviously different from the material structure of other parts, so that the moisture absorption, air permeability and flexibility of the fault part have obvious defects compared with other parts, and the moisture transport and gas transport between the composite material layers are greatly influenced. In order to avoid the above problems, the inventors have proposed the following melt-spun cross-lapped multi-layer blended nonwoven material and a method for preparing the same through a large number of innovative experiments.
Fig. 2 is a process flow diagram illustrating a method of making a melt spun cross-lapped multi-layer blended nonwoven material, as shown in fig. 2, according to an exemplary embodiment, comprising the steps of:
step 100: after being subjected to feeding, melt extrusion and metering treatment, polymer slices enter spinneret orifices of a spinneret plate which transversely and reciprocally swings according to a preset rule for spinneret spraying to obtain melt-blown fibers, and the melt-blown fibers are received by a receiving net curtain with the longitudinal conveying direction.
In a possible embodiment, the polymer chip material may be polypropylene (PP), or Polyester (PET), or Polyethylene (PE), or a mixture of at least two of the above materials.
After the melt-blown fiber is sprayed, the melt-blown superfine fiber can be formed by wind pressure drafting.
Step 200: through in the lapping mouth output wood pulp fibre of spinneret, through the super absorbent resin powder of auxiliary material mouth output of spinneret week side makes wood pulp fibre super absorbent resin powder with melt-blown fibre falls into after horizontal reciprocal swing jointly receive the curtain, wood pulp fibre with on the receipt curtain melt-blown fibre alternately entangles the bonding and forms composite fiber net jointly, super absorbent resin powder is in the in-process homodisperse that composite fiber net formed in composite fiber net top layer and inside hole.
In the embodiment of the invention, the spinneret plate transversely reciprocates to receive the longitudinal movement of the net curtain, so that the fibers are interlaced, entangled and bonded to form a composite fiber net, the high water absorbent resin powder material discharge port, the wood pulp fiber discharge port and the melt-blown fiber discharge port are fixed together to reciprocate together, and the movement direction, the movement amplitude, the movement frequency and the like of the three components are consistent.
Step 300: and repeating the preparation steps of the composite fiber web by taking the surface layer of the composite fiber web on the receiving net curtain as a receiving surface until a melt spinning cross lapping multi-layer blending non-woven material obtained by superposing a preset number of composite fiber webs is formed, wherein the composite fiber webs of all layers in the melt spinning cross lapping multi-layer blending non-woven material are compounded through the hot melting bonding effect among fibers.
The composite fiber webs are overlapped to form cross lapping, so that the melt spinning cross lapping multi-layer blending non-woven material has more fine pore structures.
In one possible embodiment, the melt spun cross-lapped multi-layer blended nonwoven material comprises 7 layers of composite webs, and in this case, a schematic view of the melt spun cross-lapped multi-layer blended nonwoven material can be shown in fig. 3, a is a composite face layer between adjacent composite webs, B is wood pulp fibers and meltblown fibers, and C is super absorbent resin powder. As can be seen from the observation of FIG. 3, the components of the super absorbent resin powder, the wood pulp fiber and the melt-blown fiber of the melt-spun cross-lapping multi-layer blending nonwoven material provided by the invention are distributed similarly to the components in the composite fiber web even in the composite surface layer between the adjacent composite fiber webs, which shows that the melt-spun cross-lapping multi-layer blending nonwoven material has better overall composite effect and excellent performance stability.
As is apparent from comparing the schematic diagram of the conventional disposable hygienic article composite material shown in fig. 1 and the schematic diagram of the melt-spun cross-lapped multi-layer blended nonwoven material shown in fig. 3, the overall performance stability of the melt-spun cross-lapped multi-layer blended nonwoven material prepared by the preparation method provided by the present invention is better than that of the conventional disposable hygienic article composite material.
It should be noted that, in a possible embodiment, different single-layer composite fiber webs can be simultaneously prepared, stacked and thermally fused and jointly output along the conveying direction, at least 2 spinneret plates are adopted in the invention, different spinneret plates are spaced from each other along the longitudinal direction by a preset distance, and the transverse reciprocating swing of the different spinneret plates can be the same or different. In another possible embodiment, the individual single-layer composite webs can be produced separately by means of a single spinneret for the purpose of producing a stack-up hot-melt composite, wherein the spinneret used according to the invention is single and the output direction of the receiving web is periodically repeated in the longitudinal direction.
In a preferred embodiment, the output trajectory of the meltblown fibers, the wood pulp fibers and the superabsorbent resin material at the receiving web is in a continuous zigzag shape or a continuous S shape. Wherein, fig. 4 is a schematic view of a continuous zigzag output track of each component on the receiving screen, fig. 5 is a schematic view of a continuous zigzag output track of each component on the receiving screen, a in fig. 4 and 5 is a conveying direction of the receiving screen, and B is a transverse reciprocating swing direction of the spinneret plate.
In a preferred embodiment, after at least two layers of the composite fiber webs are superposed and compounded, each open pore of the hot melt bonding surface between the composite fiber webs is closed again to form a 3D micropore, and the super absorbent resin powder positioned in each open pore is closed in the 3D micropore at the same time, so that the hot melt bonding surface of each composite fiber web of the melt spinning cross-lapping multi-layer blending non-woven material also has uniformly distributed super absorbent resin powder.
In a preferred embodiment, the output of the meltblown fibers, the wood pulp fibers and the superabsorbent resin material are independent and adjustable.
In a preferred embodiment, the fineness of the meltblown fibers is 0.1-50 μm.
In a preferred embodiment, the grammage of the meltblown fibers in the composite web is between 1 and 10 g/m2The fineness of the fiber is 0.1-50 mu m, and the number of the composite fiber webs of the melt spinning cross lapping multi-layer blending non-woven material is 2-30.
In a preferred embodiment, the number of composite webs of the melt spun crosslapped multi-layer blended nonwoven material is 14.
In a preferred embodiment, the water absorption capacity of the super absorbent resin powder is 100-800, the particle size is 0.1-2mm, and the gram weight of the super absorbent resin powder in each layer of composite fiber web is 10-100 g/m2。
In a preferred embodiment, the wood pulp fibers in the composite web have a length of 0.3 to 8mm, a width of 10 to 100 μm and a grammage of 1 to 30 g/m2。
In summary, the melt-spun cross-lapping multilayer blended nonwoven material and the preparation method thereof provided by the invention output the melt-blown fiber, the wood pulp fiber and the super absorbent resin powder to the receiving screen through the spinneret plate which swings transversely and reciprocally according to the preset rule, the conveying direction of the receiving screen is longitudinal, so that the wood pulp fiber and the receiving melt-blown fiber are interlaced and entangled and bonded under the swinging action to form a composite web, the super absorbent resin powder is uniformly dispersed on the surface layer and the inner pores of the composite web in the forming process of the composite web, the fibers in each composite fiber and the layers of each composite fiber are compounded through the self hot melting bonding action of the melt fiber to obtain the melt-spun cross-lapping multilayer blended nonwoven material, and the wood pulp fiber and the super absorbent resin powder are uniformly distributed on the composite surface structure of the melt-spun cross-lapping multilayer blended nonwoven material, thereby solving the technical problem that the composite material of the existing disposable sanitary article is easy to generate performance faults between layers of the composite material and achieving the technical effect of improving the performance stability of the disposable composite sanitary material.
To better illustrate the beneficial effects of a melt spun crosslapped multilayer blend nonwoven material and method of making the same provided by the present invention, the following examples 1, 2 are shown for illustration:
example 1
A) After being subjected to feeding, melt extrusion and metering treatment, polymer slices enter spinneret orifices which transversely swing back and forth according to a preset rule to carry out spinneret so as to obtain melt-blown fibers, and the melt-blown fibers are received by a receiving net curtain with the longitudinal conveying direction.
Wherein the melting temperature of the screw is 220-245 ℃, the temperature of the spinneret plate is 210-230 ℃, and the spinning speed of the spinneret orifice is 80-120 g/min.
B) Through in the lapping mouth output wood pulp fibre of spinneret, through the super absorbent resin powder of auxiliary material mouth output of spinneret week side makes wood pulp fibre super absorbent resin powder with melt-blown fibre falls into after horizontal reciprocal swing jointly receive the curtain, wood pulp fibre with on the receipt curtain melt-blown fibre alternately entangles the bonding and forms composite fiber net jointly, super absorbent resin powder is in the in-process homodisperse that composite fiber net formed in composite fiber net top layer and inside hole. The output tracks of the melt-blown fibers, the wood pulp fibers and the super absorbent resin powder at the receiving net curtain are in a continuous Z shape.
Wherein the material dusting speed of the auxiliary material port for outputting the super absorbent resin powder is 300g/min-420g/min, and the transverse reciprocating swing wire and transverse reciprocating dusting speed is 10 m/min.
C) Taking the surface layer of the composite fiber web on the receiving screen as a receiving surface, repeating the preparation steps of the composite fiber web until 14 layers of composite fiber webs are superposed to form a melt spinning cross lapping multi-layer blended non-woven material, wherein the composite fiber webs of the layers in the melt spinning cross lapping multi-layer blended non-woven material are compounded through the hot melting bonding effect among fibers, and the gram weight of the melt spinning cross lapping multi-layer blended non-woven material is 300g/m2。
Example 2
A) After being subjected to feeding, melt extrusion and metering treatment, polyester chips enter spinneret orifices of a spinneret plate which transversely and reciprocally swings according to a preset rule for spinneret spraying to obtain melt-blown fibers, and the melt-blown fibers are received by a receiving net curtain with the longitudinal conveying direction.
Wherein the melting temperature of the screw is 220-245 ℃, the temperature of the spinneret plate is 210-230 ℃, and the spinning speed of the spinneret orifice is 80-120 g/min.
B) Through in the lapping mouth output wood pulp fibre of spinneret, through the super absorbent resin powder of auxiliary material mouth output of spinneret week side makes wood pulp fibre super absorbent resin powder with melt-blown fibre falls into after horizontal reciprocal swing jointly receive the curtain, wood pulp fibre with on the receipt curtain melt-blown fibre alternately entangles the bonding and forms composite fiber net jointly, super absorbent resin powder is in the in-process homodisperse that composite fiber net formed in composite fiber net top layer and inside hole. The output tracks of the melt-blown fibers, the wood pulp fibers and the super absorbent resin powder at the receiving net curtain are in a continuous S shape.
Wherein the material dusting speed of the super absorbent resin powder material output by the auxiliary material port is 240g/min-320g/min, and the transverse reciprocating swing wire and transverse reciprocating dusting speed is 7 m/min.
C) Taking the surface layer of the composite fiber web on the receiving screen as a receiving surface, repeating the preparation steps of the composite fiber web until 14 layers of composite fiber webs are superposed to form a melt spinning cross lapping multi-layer blended non-woven material, wherein the composite fiber webs of the layers in the melt spinning cross lapping multi-layer blended non-woven material are compounded through the hot melting bonding effect among fibers, and the gram weight of the melt spinning cross lapping multi-layer blended non-woven material is 450g/m2。
Wherein, a microscopic electron microscope schematic diagram of the melt spinning cross-lapping multi-layer blending non-woven material prepared in the example 1 is shown in fig. 6, particles in the fiber material are super absorbent resin powder
It should be noted that the present invention also has the following advantages:
1. the flexibility is good. The internal fibers and the composite fiber webs of the melt spinning cross lapping multi-layer blending non-woven material provided by the invention are fused and bonded by themselves, glue bonding is not adopted to reduce the stiffness of the glue, and melt-blown fibers are thinner and longer and have very excellent softness.
2. The air permeability is good. The melt spinning cross lapping multi-layer blending non-woven material provided by the invention is not bonded by glue, the air permeability between layers of the composite fiber net is better, the contact area with skin is small, and the non-close-fitting effect is avoided.
3. The hydrophilicity and the water absorption performance are more excellent. When the melt spinning cross lapping multi-layer blending non-woven material provided by the invention is applied to the surface layer of sanitary towels, paper diapers and adult incontinence pants, as the composite surface between the composite fiber webs also has the wood pulp fibers and the SAP which are uniformly distributed, the SAP is uniformly dispersed in the integral material of the melt spinning cross lapping multi-layer blending non-woven material and can be better contacted with liquid, the water absorption performance is greatly improved, when the melt spinning cross lapping multi-layer blending non-woven material is applied to wet tissues and facial masks, the wood pulp fibers and the melt fibers are alternately wound, the contact surface with the liquid is increased, and the water absorption effect is very outstanding;
4. environmental protection, safety, low carbon and energy saving. The fiber is adopted for fusion bonding, so that the bonding by using glue is avoided, the environment-friendly effect is achieved, and the contact with the skin is safer; the integrated material reduces the processes, not only reduces the equipment cost, but also reduces the packaging, transportation and labor costs, and is more energy-saving and low-carbon.
While the invention has been described in detail in the foregoing by way of general description, and specific embodiments and experiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof.
Claims (10)
1. A method for preparing a melt-spun cross-lapping multi-layer blended non-woven material is characterized by comprising the following steps:
after being subjected to feeding, melt extrusion and metering treatment, polymer slices enter spinneret orifices of a spinneret plate which transversely and reciprocally swings according to a preset rule for spinneret spraying to obtain melt-blown fibers, and the melt-blown fibers are received by a receiving net curtain with a longitudinal conveying direction;
outputting wood pulp fibers through a lapping port of the spinneret plate, and outputting super absorbent resin powder through an auxiliary material port on the peripheral side of the spinneret plate, so that the wood pulp fibers, the super absorbent resin powder and the melt-blown fibers are transversely and reciprocally swung and then fall into the receiving net curtain, the wood pulp fibers and the melt-blown fibers on the receiving net curtain are interlaced, entangled and bonded to form a composite fiber web, and the super absorbent resin powder is uniformly dispersed on the surface layer and inner pores of the composite fiber web in the forming process of the composite fiber web;
and repeating the preparation steps of the composite fiber web by taking the surface layer of the composite fiber web on the receiving net curtain as a receiving surface until a melt spinning cross lapping multi-layer blending non-woven material obtained by superposing a preset number of composite fiber webs is formed, wherein the composite fiber webs of all layers in the melt spinning cross lapping multi-layer blending non-woven material are compounded through the hot melting bonding effect among fibers.
2. The method of claim 1, wherein said meltblown fibers, said wood pulp fibers, and said superabsorbent resin particulate are in a continuous zigzag pattern or a continuous S pattern on an output trajectory of said receiving web.
3. The preparation method of claim 1, wherein after at least two layers of the composite fiber webs are superposed and compounded, each open pore of the hot melt bonding surface between the composite fiber webs is closed again to form a 3D micropore, and the super absorbent resin powder positioned in each open pore is simultaneously closed in the 3D micropore, so that the hot melt bonding surface of each composite fiber web of the melt-spun cross-lapping multi-layer blending non-woven material also has uniformly distributed super absorbent resin powder.
4. The method of claim 1, wherein the outputs of said meltblown fibers, said wood pulp fibers and said superabsorbent resin powder are independent and adjustable.
5. The production method according to claim 1, wherein the fineness of the meltblown fibers is 0.1 to 50 μm.
6. The method of claim 1, wherein the meltblown fibers in the composite web have a grammage of 1-10 g/m2The fineness of the fiber is 0.1-50 mu m, and the melt spinning cross lapping multi-layer blended composite fiber web of the non-woven materialThe number of layers is 2-30.
7. The method of claim 6, wherein the number of composite web layers of the melt spun cross-lapped multi-layer blended nonwoven material is 14.
8. The method as claimed in claim 1, wherein the super absorbent resin powder has a water absorption capacity of 100-800, a particle size of 0.1-2mm, and a grammage of 10-100 g/m2。
9. The method of claim 1 wherein said wood pulp fibers in said composite web have a length of 0.3 to 8mm, a width of 10 to 100 μm and a grammage of 1 to 30 g/m2。
10. A melt-spun cross-lapped multi-layer blended nonwoven material, characterized in that it is produced by the process of any one of claims 1 to 9.
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| CN114541032B (en) | 2023-04-28 |
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