CN111603312B - Absorber for disposable sanitary article and forming device thereof - Google Patents
Absorber for disposable sanitary article and forming device thereof Download PDFInfo
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- CN111603312B CN111603312B CN202010492821.7A CN202010492821A CN111603312B CN 111603312 B CN111603312 B CN 111603312B CN 202010492821 A CN202010492821 A CN 202010492821A CN 111603312 B CN111603312 B CN 111603312B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15764—Transferring, feeding or handling devices; Drives
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530131—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made in fibre but being not pulp
- A61F2013/530226—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made in fibre but being not pulp with polymeric fibres
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F2013/53445—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad from several sheets
Abstract
The invention discloses an absorber for disposable hygienic products, a forming method and a forming device thereof, wherein the absorber comprises a wrapping layer, a covering layer, an absorbing layer and an elastic fiber layer, and at least one absorbing layer and one elastic fiber layer are arranged between the wrapping layer and the covering layer; when the absorption layer and the elastic fiber layer have multiple layers, the two layers are alternately distributed layer by layer. The forming device comprises a defibrator, an SAP conveying mechanism, a forming cover, a cellosilk spraying mechanism and a forming box. The forming method comprises the steps of continuously conveying the wrapping layer by a forming box, defibrating the wood pulp raw material, mixing the defibered wood pulp raw material with the SAP raw material, forming the absorbing layer, carrying out spinning on the elastic high polymer material after high-temperature melting to form an elastic fiber layer, alternately forming the absorbing layer and the elastic fiber layer until the set number of layers is reached, and finally compounding the covering layer to form the absorber. The invention can continuously and efficiently produce the absorber on line, and the absorber has stronger absorptivity and softness and also has the advantage of difficult deformation or lump formation after absorbing liquid.
Description
Technical Field
The invention relates to the technical field of manufacturing of disposable sanitary products, in particular to an absorber for the disposable sanitary products and a forming device thereof.
Background
In the existing disposable sanitary product industry, the more common products mainly include baby diapers, baby pull-ups, adult diapers, adult pull-ups, feminine sanitary napkins, panty liners, and the like, and the main structures of the absorbent bodies of these products mainly include the following two types:
(1) the absorption layer is formed by mixing wood pulp and SAP (high liquid absorption capacity resin), the absorber with the structure has the advantages of strong liquid absorption capacity and good flexibility in actual use, but also has the defect that the absorber is easy to generate the phenomena of fault, lump and the like after absorbing liquid, and the user experience effect is poor if the absorber is not replaced in time and the phenomena of liquid leakage and the like are easy to generate;
(2) the absorbent layer is formed by using fluffy cloth and SAP (high liquid absorption capacity resin), the absorbent body of the structure obviously has the advantages of thin thickness, difficult deformation or lumping after absorbing liquid and the like in practical use, but in the absorbent body of the structure, the distribution of the SAP is often too concentrated and lacks of fiber diversion, when liquid enters, the SAP on the surface quickly absorbs the liquid and then forms gelatinous polymer, and after the polymer forms a layer of barrier, the polymer can prevent the liquid from continuously permeating downwards and absorbing, so the liquid absorption capacity of the absorbent body is poor; meanwhile, the raw material cost of the fluffy cloth is high, the material flexibility is poor, so that the absorber also has the defects of poor flexibility and high production cost, and when the fluffy cloth is used, the use experience effect of a user also has a large improvement space.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an absorber for disposable hygienic products, which has strong absorptivity and softness, has the advantage of being not easy to deform or lump after absorbing liquid, and can effectively improve the use experience effect of users.
Another object of the present invention is to provide a molding apparatus for the absorbent body for disposable sanitary products, which is simple in principle and can rapidly and continuously mold the absorbent body having an elastic fiber layer.
The technical scheme of the invention is as follows: an absorber for disposable sanitary products comprises a wrapping layer, a covering layer, an absorbing layer and an elastic fiber layer, wherein an absorbing space of the absorber is formed between the inner side of the wrapping layer and the inner side of the covering layer, and at least one absorbing layer and at least one elastic fiber layer are arranged in the absorbing space; when the absorption layer and the elastic fiber layer have multiple layers, the absorption layer and the elastic fiber layer are alternately distributed layer by layer. The wrapping layer is used as an outer wrapping layer of the absorber, the covering layer is used as an inner side surface layer of the absorber, and the wrapping layer and the covering layer jointly play a role in fixing each layer of structure in the absorber; the main structure of the absorber is composed of the absorption layer and the elastic fiber layer, the absorption layer is mainly used for absorbing liquid, and the elastic fiber layer plays a role in fixing the structure of the absorption layer, so that the stability of the structure of the absorption layer is improved.
The elastic fiber layer is a layered structure formed by side-by-side distribution of a plurality of continuous elastic fiber yarns, and each elastic fiber yarn is formed by high-temperature melting and then spinning. Because each elastic fiber yarn has good elasticity, and after the elastic fiber yarns are distributed side by side to form the elastic fiber layers and clamped between two adjacent absorption layers or other layer structures, on one hand, the absorption layers can keep good liquid absorption capacity and softness, and meanwhile, the elastic fiber yarns lock the absorption layer structures, so that the absorption layers are stable in structure and can not deform after absorbing liquid, but can keep certain elasticity; on the other hand, the gaps are formed among the elastic fiber yarns, so that the whole absorber can be kept to have good air permeability, and the liquid absorption capacity of the absorption layer is not influenced. In the elastic fiber layer, the thickness of the elastic fiber layer is 0.01 mm-0.05 mm, the distribution density of the elastic fiber filaments is 3 g/square meter-10 g/square meter, and tests prove that the distribution density in the range is the optimal range, so that the liquid absorption capacity of the absorption layer and the integral air permeability of the absorber can be effectively maintained, and the stability of the structure of the absorption layer can be well maintained.
The material of the absorbent layer is a mixture of wood pulp and SAP, which has good liquid-absorbing capacity and softness. The thickness of the absorption layer is 150 g/square meter to 600 g/square meter.
The material of the wrapping layer is breathable non-woven fabric, and the material of the covering layer is hydrophilic non-woven fabric. The wrapping layer is used as an outer wrapping layer of the absorber, the covering layer is used as an inner side contact layer of the absorber, and two sides of the wrapping layer extend to two side edges along the bottom of the absorber to be connected with two sides of the covering layer.
The invention relates to a method for forming an absorber for disposable hygienic products, which comprises the following steps: the absorber comprises a wrapping layer, a covering layer, an absorbing layer and an elastic fiber layer, an absorbing space of the absorber is formed between the inner side of the wrapping layer and the inner side of the covering layer, and at least one absorbing layer and at least one elastic fiber layer are arranged in the absorbing space; when the absorption layer and the elastic fiber layer are provided with a plurality of layers, the absorption layer and the elastic fiber layer are alternately distributed layer by layer;
the wrapping layer is continuously conveyed by a forming box; defibering the wood pulp raw material and mixing the defibered wood pulp raw material with the SAP raw material to form a mixed material; forming an absorption layer on the wrapping layer by the mixed material by utilizing the negative pressure adsorption effect of the forming box; the wrapping layer with the absorbing layer is continuously conveyed forwards, the elastic high polymer material is subjected to spinning after being melted at high temperature, and the spun elastic fiber filaments are directly compounded on the absorbing layer to form an elastic fiber layer; the wrapping layer is continuously conveyed forwards and alternately forms the absorption layer and the elastic fiber layer until the absorption layer and the elastic fiber layer reach the set number of layers; and finally, compounding a covering layer on the wrapping layer with the absorption layer and the elastic fiber layer to form the absorber.
During the absorbed layer shaping, utilize the defibering machine to carry out defibering to the wood pulp raw materials earlier and send into the forming cover, utilize SAP conveyor to send into the SAP raw materials in the forming cover simultaneously, SAP raw materials mixes in the forming cover with the wood pulp raw materials after the defibering, and the mixed material that forms is to forming case surface runner under the negative pressure adsorption of forming case, and at forming cover exit, the mixed material shaping absorbed layer on the parcel layer.
When the elastic fiber layer is formed, an extruder is used for carrying out high-temperature melting extrusion on the elastic high polymer material, a spinneret plate is arranged at a die head of the extruder for carrying out spinning, and the spun elastic fiber is directly compounded on the surface of the absorption layer to form the elastic fiber layer.
The elastic high polymer material is PP (polypropylene) or PET (polyethylene terephthalate).
In the forming method, the absorption layer and the elastic fiber layer are respectively formed layer by layer through the forming cover and the fiber yarn spraying mechanism (mainly composed of an extruder and a spinneret plate) by utilizing the negative pressure adsorption effect of the forming box, the on-line continuous processing of the absorber can be realized, the process flow is simplified, and meanwhile, the number of the layers of the absorption layer and the elastic fiber layer can be correspondingly adjusted by adjusting the number of the outlets of the forming cover and the number of the fiber yarn spraying mechanisms according to the use requirements of different kinds of disposable sanitary products, so that the use is flexible; the absorption layer is made of the mixed raw materials of SAP and wood pulp, the absorption layer has good liquid absorption capacity and softness, the elastic fiber yarns are made of elastic high polymer materials to form the elastic fiber layer, the liquid absorption capacity of the absorption layer and the integral air permeability of the absorber can be effectively kept, and the stability of the structure of the absorption layer can be well maintained.
The invention relates to a forming device of an absorber for disposable sanitary products, which comprises the following specific steps: the absorber comprises a wrapping layer, a covering layer, an absorbing layer and an elastic fiber layer, an absorbing space of the absorber is formed between the inner side of the wrapping layer and the inner side of the covering layer, and at least one absorbing layer and at least one elastic fiber layer are arranged in the absorbing space; when the absorption layer and the elastic fiber layer are provided with a plurality of layers, the absorption layer and the elastic fiber layer are alternately distributed layer by layer;
the forming device comprises a defibrator, an SAP conveying mechanism, a forming cover, a fiber yarn spraying mechanism and a forming box, wherein the forming box is a continuous conveying type negative pressure forming device, a wrapping layer conveying mechanism is arranged at the inlet end of the forming box, and a covering layer conveying mechanism is arranged at the outlet end of the forming box; the outlet of the forming cover and the outlet of the cellosilk spraying mechanism are sequentially arranged above the forming box along the conveying direction of the wrapping layer, and the defibrator and the SAP conveying mechanism are respectively connected with the forming cover; the absorbing layer is formed at the outlet of the forming cover, and the elastic fiber layer is formed at the outlet of the fiber yarn spraying mechanism. The system comprises a forming cover, a defibrator, an SAP conveying mechanism, a forming box and a forming box, wherein the defibrator defibrates wood pulp raw materials and conveys the wood pulp raw materials into the forming cover, the SAP conveying mechanism conveys SAP raw materials into the forming cover, the defibered wood pulp raw materials and the SAP raw materials are mixed in the forming cover and move downwards under the negative pressure action of the forming box until the wood pulp raw materials and the SAP raw materials are adsorbed on the surface of a wrapping layer, and an absorption layer is formed on the surface of the wrapping layer; the fiber yarn jetting mechanism jets out elastic fiber yarns, the elastic fiber yarns form an elastic fiber layer in the same plane, and the elastic fiber layer is adsorbed to the surface of the formed absorption layer under the action of negative pressure of the forming box.
The forming cover is provided with at least one outlet, the fiber yarn spraying mechanisms are provided with at least one, each forming cover outlet is correspondingly formed with a layer of absorbing layer, and each fiber yarn spraying mechanism is correspondingly formed with a layer of elastic fiber layer;
when the forming cover is provided with a plurality of outlets, the forming cover is integrally in a comb-shaped structure, the upper part of the forming cover is a transverse main channel, the lower part of the forming cover is a plurality of longitudinal sub-channels which are distributed in parallel, the defibrator is arranged at one end of the transverse main channel, and each longitudinal sub-channel is connected with an SAP conveying mechanism. The wood pulp raw material enters the forming cover from the transverse main channel after being defibered by the defibering machine, then enters each corresponding longitudinal branch channel under the negative pressure action of the forming box, and is mixed with the SAP raw material sent by the SAP conveying mechanism in the longitudinal branch channels.
When the forming cover is provided with a plurality of outlets and/or the cellosilk spraying mechanisms are provided with a plurality of outlets, the outlets of the forming cover and the cellosilk spraying mechanisms are alternately distributed above the forming box. When the absorber is processed, the absorption layer and the elastic fiber layer are alternately distributed, the absorption layer and the elastic fiber layer form a main body structure of the absorber, wherein the absorption layer is mainly used for absorbing liquid, and the elastic fiber layer plays a role in fixing the structure of the absorption layer, so that the stability of the structure of the absorption layer is improved. In the actual production, according to the imbibition demand of different products in the in-service use, can suitably increase or reduce the layer number of absorbing layer, elastic fiber layer, the corresponding adjustment in forming device is to the export quantity of forming cover and the quantity of cellosilk ejection mechanism can.
The fiber yarn spraying mechanism comprises an extruder and a spinneret plate, the extruder is a screw extruder, the spinneret plate is used as a die head of the extruder, and the outlet end of the spinneret plate is provided with a row of uniformly distributed spraying holes. In the spinneret plate structure, parameters such as distribution density, diameter and the like of the jet holes can be adjusted according to actual requirements of disposable hygienic products and characteristics of raw materials for manufacturing the elastic fiber yarns.
The SAP conveying mechanism comprises a charging bucket, a conveying unit and a discharging pipe which are sequentially connected from top to bottom, and the lower end of the discharging pipe extends into the longitudinal branch channel. The concrete structure of each main component of the SAP conveying mechanism is the same as that of the SAP conveying mechanism in the traditional forming device.
The forming box comprises a plurality of sub-boxes which are connected in sequence, and the sub-boxes are identical in structure and the top surfaces of the sub-boxes are kept in the same horizontal plane. Divide into a plurality of branch casees with the shaping case and connect, can effectively avoid causing the great phenomenon of vacuum difference everywhere in the shaping case because of the shaping case inner chamber is too big, effectively ensure the degree of consistency on absorbed layer and elastic fiber layer. Each sub-box comprises a negative pressure box body, a breathable mesh belt, a negative pressure interface, a mesh belt driving roller and a mesh belt tensioning driven roller, wherein the negative pressure interface is connected to one side of the negative pressure box body, the surface of the negative pressure box body is covered with the breathable mesh belt which rotates in a circulating mode, the mesh belt driving roller and the mesh belt tensioning driven rollers are distributed at two ends of the negative pressure box body, and the breathable mesh belt is arranged between the mesh belt driving roller and the mesh belt tensioning driven rollers. Wherein, the negative pressure interface is externally connected with a negative pressure device (such as a vacuum fan and the like), the air permeable mesh belt is driven by the mesh belt driving roller to circularly rotate, and the wrapping layer is continuously conveyed by the air permeable mesh belt; the air-permeable net belt is used for supporting the wrapping layer and the formed absorption layer and the formed elastic fiber layer, and provides a forming platform for the new absorption layer and the formed elastic fiber layer, so that the wrapping layer is prevented from being sucked into the negative pressure box body by negative pressure, and the forming stability of the absorber is improved. The top of the negative pressure box body is of an open structure, and the airflow inside the negative pressure box body is communicated with the airflow inside the forming cover.
When the forming device is used for forming the absorber of the disposable sanitary product, a wrapping layer glue gun is also arranged on the wrapping layer conveying mechanism and close to the inlet end of the forming box; and a covering layer glue gun is also arranged at the outlet end close to the forming box on the covering layer conveying mechanism. After the wrapping layer is discharged, in the continuous conveying process, firstly, the surface of the wrapping layer is sprayed with glue by a wrapping layer glue gun and then the wrapping layer is sent to a forming box; on a forming box, a defibering machine defibers wood pulp raw materials and sends the wood pulp raw materials into a forming cover, meanwhile, SAP conveying devices send SAP raw materials into the forming cover, the SAP raw materials and the defibered wood pulp raw materials are mixed in the forming cover, the SAP raw materials flow to the surface of the forming box under the negative pressure adsorption effect of the forming box, and at the outlet of the forming cover, the mixed materials of SAP and wood pulp form an absorption layer on a wrapping layer; the wrapping layer with the absorbing layer is continuously conveyed forwards, online spinning is carried out by a fiber yarn spraying mechanism, and the formed elastic fiber yarns are directly compounded on the surface of the absorbing layer to form an elastic fiber layer; when the wrapping layer with the absorbing layer and the elastic fiber layer is conveyed forwards continuously, a next absorbing layer or elastic fiber layer can be formed on the surface of the wrapping layer continuously until the set number of layers is reached; and finally, after the covering layer is discharged at the outlet end of the forming box, spraying glue on the surface of the covering layer by a covering layer glue gun, and compounding the covering layer with a wrapping layer with an absorption layer and an elastic fiber layer to finally form the absorber.
Compared with the prior art, the invention has the following beneficial effects:
this disposable is absorbent for health supplies compares with traditional absorbent through setting its main part to alternate distribution's absorbed layer and elastic fiber layer, and this absorbent had both had stronger absorptivity and soft close skin nature, also had non-deformable or played the advantage that sticks together behind the absorption liquid simultaneously, can effectively improve the experience effect that the user used, in addition, has avoided the use of fluffy pine cloth, can also effectively reduce material cost. In addition, the number of piles of absorbed layer and elastic fiber layer can be adjusted according to the imbibition demand of different products in-service use, and its structure sets up nimble changeable, and the range of application is handed over, has good market prospect.
In the absorber for the disposable sanitary product, the elastic fiber layer is formed by adopting the polypropylene fiber yarns which are distributed side by side and is clamped between two adjacent absorption layers or other layer structures, on one hand, the absorption layers can keep good liquid absorption capacity and softness, and simultaneously the absorption layer structures are locked by the elastic fiber yarns, so that the absorption layers are stable in structure and do not deform after absorbing liquid, but can keep certain elasticity; on the other hand, the gaps are formed among the elastic fiber yarns, so that the whole absorber can be kept to have good air permeability, and the liquid absorption capacity of the absorption layer is not influenced.
The forming method of the absorber for the disposable sanitary product has the advantages of simple process, high production efficiency and lower production cost, can realize the online continuous high-efficiency production of the absorber, and effectively ensures the stability of the product structure by forming the absorbing layer with good liquid absorbing capacity and softness and the elastic fiber layer used as the reinforcing rib alternately between the wrapping layer and the covering layer and by utilizing the combination of the absorbing layer and the elastic fiber layer.
This forming device of absorber for disposable hygienic products principle is simple, but the quick continuous molding possesses the absorber on elastic fiber layer, and simultaneously, the device simple structure and flexibility can adapt to the shaping of the absorber of different kinds of disposable hygienic products through adjusting its shaping cover export quantity and SAP conveying mechanism quantity and use, and its accommodation is wide, has better market prospect. In the forming device, the extruding machine and the spinneret plate are adopted to form the fiber yarn spraying mechanism, so that the forming of the elastic fiber yarn and the compounding of the elastic fiber layer can be simultaneously realized on the wrapping layer and the absorption layer which are continuously conveyed, the production efficiency is effectively improved, a good compounding effect is also realized, and the structure of the formed absorber is more stable.
Drawings
FIG. 1 is a schematic cross-sectional view of an absorbent body for disposable sanitary products.
FIG. 2 is a schematic view showing the principle of a molding method and apparatus for molding the absorbent body for disposable sanitary products.
FIG. 3 is a schematic view of a single sub-section of the forming box of FIG. 2.
Fig. 4 is a schematic view of the structure of the sub-box shown in fig. 3 in another direction.
Fig. 5 is a schematic structural view of each component part of the split box shown in fig. 4.
In the above figures, the components indicated by the respective reference numerals are as follows: the device comprises a fiber opening machine 1, an SAP conveying mechanism 2, a charging basket 2-1, a conveying unit 2-2, a blanking pipe 2-3, a forming cover 3, a transverse overall channel 3-1, a longitudinal sub-channel 3-2, a fiber wire ejecting mechanism 4, a forming box 5, a negative pressure box 5-1, an air permeable mesh belt 5-2, a negative pressure port 5-3, a mesh belt driving roller 5-4, a mesh belt tensioning driven roller 5-5, a box supporting seat 5-6, a wrapping layer conveying mechanism 6, a covering layer conveying mechanism 7, a wrapping layer glue gun 8, a covering layer glue gun 9, a wrapping layer 10, a covering layer 11, an absorbing layer 12 and an elastic fiber layer 13.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
The absorbent body for disposable sanitary products of this embodiment includes a wrapping layer 10, a cover layer 11, three absorbent layers 12 and two elastic fiber layers 13, as shown in fig. 1. The wrapping layer is used as an outer wrapping layer of the absorber, the covering layer is used as an inner side surface layer of the absorber, and the wrapping layer and the covering layer jointly play a role in fixing each layer of structure in the absorber; the main structure of the absorber is composed of the absorption layer and the elastic fiber layer, the absorption layer is mainly used for absorbing liquid, and the elastic fiber layer plays a role in fixing the structure of the absorption layer, so that the stability of the structure of the absorption layer is improved.
The specific structure of each layer is as follows:
the elastic fiber layer is a layered structure formed by side-by-side distribution of a plurality of continuous elastic fiber yarns, and each elastic fiber yarn is a polypropylene fiber yarn formed by spinning after high-temperature melting. The polypropylene fiber yarns have good elasticity and toughness, so that the stability of the structure of the absorber can be well maintained; after the elastic fiber yarns are distributed side by side to form the elastic fiber layers and clamped between two adjacent absorption layers or other layer structures, on one hand, the absorption layers can keep good liquid absorption capacity and softness, and meanwhile, the elastic fiber yarns lock the absorption layer structures, so that the absorption layers are stable in structure and do not deform after absorbing liquid, but can keep certain elasticity; on the other hand, the gaps are formed among the elastic fiber yarns, so that the whole absorber can be kept to have good air permeability, and the liquid absorption capacity of the absorption layer is not influenced. In this embodiment, the distribution density of the elastic fiber filaments is 0.01mm to 0.05 mm. Tests prove that the distribution density in the range is the optimal range, so that the liquid absorption capacity of the absorption layer and the integral air permeability of the absorption body can be effectively maintained, and the stability of the structure of the absorption layer can be well maintained. The thickness of the elastic fiber layer is 3 g/square meter to 10 g/square meter.
The material of the absorbent layer is a mixture of wood pulp and SAP, which has good liquid-absorbing capacity and softness. The thickness of the absorption layer is 150 g/square meter to 600 g/square meter.
The wrapping layer is made of breathable non-woven fabric.
The covering layer is made of hydrophilic non-woven fabric.
In this embodiment, the wrapping layer is as the outer wrapping layer of absorber, and the overburden is as the inboard contact layer of absorber, and the both sides of wrapping layer extend to the both sides edge along the absorber bottom and meet with the both sides of overburden, forms the absorption space of absorber between the inboard of wrapping layer and the inboard of overburden, and three-layer absorbing layer and two layers of elastic fiber layer locate in the absorption space, respectively have one deck absorbing layer to meet with wrapping layer inboard and overburden inboard, set up one deck elastic fiber layer between the adjacent two-layer absorbing layer. In this structure, the parcel layer is inboard all meets with the absorbed layer with the overburden inboard, and the absorbed layer absorbs liquid fast when can guaranteeing to use, and the user experience preferred sets up two-layer elastic fiber layer and one deck absorbed layer again in the middle part, can guarantee the stability of absorbent structure to guarantee that it possesses stable imbibition ability and compliance. In the actual production, the number of the absorbing layer and the elastic fiber layer can be properly increased or reduced according to the liquid absorption requirements of different products in actual use.
When the absorber is used, the principle is as follows: the wrapping layer is used as an outer wrapping layer of the absorber, the covering layer is used as an inner side contact layer of the absorber, and the wrapping layer and the covering layer play a role in fixing and supporting structures of all layers in the absorber together; the absorption layer and the elastic fiber layer form a main body structure of the absorber, the absorption layer is mainly used for absorbing liquid and keeping good liquid absorption performance and softness, the absorption layer can be made of materials (namely wood pulp and SAP mixed materials) the same as those of a traditional absorber, and the elastic fiber layer is reused for fixing the structure of the absorption layer, so that the stability of the structure of the absorption layer is improved, and the phenomena of faults, lump formation and the like of the absorption layer after liquid absorption are avoided.
Example 2
This example is a method and apparatus for forming an absorbent body for disposable sanitary products, which is used to form the absorbent body of example 1.
As shown in fig. 2, the forming device comprises a defibrator 1, an SAP conveying mechanism 2, a forming cover 3, a cellosilk spraying mechanism 4 and a forming box 5, the forming box is a continuous conveying type negative pressure forming device, a wrapping layer conveying mechanism 6 is arranged at the inlet end of the forming box, and a covering layer conveying mechanism 7 is arranged at the outlet end of the forming box; along the conveying direction of the wrapping layer, the outlet of the forming cover and the outlet of the cellosilk spraying mechanism are sequentially arranged above the forming box, and the defibrator and the SAP conveying mechanism are respectively connected with the forming cover. A wrapping layer glue gun 8 is also arranged on the wrapping layer conveying mechanism and close to the inlet end of the forming box; and a covering layer glue gun 9 is also arranged at the outlet end close to the forming box on the covering layer conveying mechanism. The system comprises a forming cover, a defibrator, an SAP conveying mechanism, a forming box and a forming box, wherein the defibrator defibrates wood pulp raw materials and conveys the wood pulp raw materials into the forming cover, the SAP conveying mechanism conveys SAP raw materials into the forming cover, the defibered wood pulp raw materials and the SAP raw materials are mixed in the forming cover and move downwards under the negative pressure action of the forming box until the wood pulp raw materials and the SAP raw materials are adsorbed on the surface of a wrapping layer, and an absorption layer is formed on the surface of the wrapping layer; the fiber yarn jetting mechanism jets out elastic fiber yarns, the elastic fiber yarns form an elastic fiber layer in the same plane, and the elastic fiber layer is adsorbed to the surface of the formed absorption layer under the action of negative pressure of the forming box.
The specific structure of each mechanism is as follows:
the fiber-splitting machine is the same structure as that of the traditional forming device.
The SAP conveying mechanism comprises a charging basket 2-1, a conveying unit 2-2 and a blanking pipe 2-3 which are sequentially connected from top to bottom, wherein the lower end of the blanking pipe extends into the longitudinal branch channel of the forming cover. The concrete structure of each main component of the SAP conveying mechanism is the same as that of the SAP conveying mechanism in the traditional forming device.
The forming cover is provided with three outlets, the forming cover is integrally in a comb-shaped structure, the upper part of the forming cover is a transverse main channel 3-1, the lower part of the forming cover is three longitudinal sub-channels 3-2 which are distributed in parallel, the defibrator is arranged at one end of the transverse main channel, and each longitudinal sub-channel is connected with an SAP conveying mechanism. The wood pulp raw material enters the forming cover from the transverse main channel after being defibered by the defibering machine, then enters each corresponding longitudinal branch channel under the negative pressure action of the forming box, and is mixed with the SAP raw material sent by the SAP conveying mechanism in the longitudinal branch channels.
The fiber yarn ejecting mechanism comprises an extruder and a spinneret (not shown in the specific structural diagram), the extruder adopts a screw extruder with a traditional structure, the spinneret is used as a die head of the extruder, and the outlet end of the spinneret is provided with a row of ejecting holes which are uniformly distributed. In the spinneret plate structure, parameters such as distribution density, diameter and the like of the jet holes can be adjusted according to actual requirements of disposable hygienic products and characteristics of raw materials for manufacturing the elastic fiber yarns.
In the structure, the outlet of each forming cover correspondingly forms an absorption layer, and each cellosilk spraying mechanism correspondingly forms an elastic fiber layer. The export of shaping cover and cellosilk ejection mechanism distribute in the shaping case top in turn, and absorber adds man-hour promptly, and absorbed layer and elastic fiber layer distribute in turn, and the major structure of absorber is constituteed to absorbed layer and elastic fiber layer, and wherein, the absorbed layer mainly used absorbs liquid, and the elastic fiber layer plays the fixed action to the structure of absorbed layer, improves the stability of absorbed layer structure. In the actual production, according to the imbibition demand of different products in the in-service use, can suitably increase or reduce the layer number of absorbing layer, elastic fiber layer, the corresponding adjustment in forming device is to the export quantity of forming cover and the quantity of cellosilk ejection mechanism can.
The forming box comprises three branch boxes which are connected in sequence, and each branch box is identical in structure and the top surface of each branch box is kept in the same horizontal plane. Divide into three branch casees with the shaping case and connect, can effectively avoid causing the great phenomenon of vacuum difference everywhere in the shaping case because of the shaping case inner chamber is too big, effectively ensure the degree of consistency on absorbed layer and elastic fiber layer. Along the conveying direction of the wrapping layer, a first outlet of the forming cover and the first fiber yarn spraying mechanism are arranged above the first sub-box, a second outlet of the forming cover and the second fiber yarn spraying mechanism are arranged above the second sub-box, and a third outlet of the forming cover and the covering layer conveying mechanism are arranged above the third sub-box. As shown in fig. 3 to 5, the sub-tank comprises a negative pressure tank body 5-1, a breathable mesh belt 5-2, a negative pressure interface 5-3, a mesh belt driving roller 5-4 and a mesh belt tensioning driven roller 5-5, wherein one side of the negative pressure tank body is connected with the negative pressure interface, the surface of the negative pressure tank body is covered with the breathable mesh belt which rotates circularly, a mesh belt driving roller and a plurality of mesh belt tensioning driven rollers are distributed at two ends of the negative pressure tank body, and the breathable mesh belt is arranged between the mesh belt driving roller and the mesh belt tensioning driven roller. Wherein, the negative pressure interface is externally connected with a negative pressure device (such as a vacuum fan and the like), the air permeable mesh belt is driven by the mesh belt driving roller to circularly rotate, and the wrapping layer is continuously conveyed by the air permeable mesh belt; the air-permeable net belt is used for supporting the wrapping layer and the formed absorption layer and the formed elastic fiber layer, and provides a forming platform for the new absorption layer and the formed elastic fiber layer, so that the wrapping layer is prevented from being sucked into the negative pressure box body by negative pressure, and the forming stability of the absorber is improved. As shown in fig. 4, the top of the negative pressure box body is an open structure, and the airflow inside the negative pressure box body is communicated with the airflow inside the forming cover. In addition, a box body supporting seat 5-6 is also arranged at the bottom of the negative pressure box body.
The forming method realized by the forming device comprises the following steps: as shown in fig. 2, the wrapping is continuously conveyed from the forming box; defibering the wood pulp raw material and mixing the defibered wood pulp raw material with the SAP raw material to form a mixed material; forming an absorption layer on the wrapping layer by the mixed material by utilizing the negative pressure adsorption effect of the forming box; the wrapping layer with the absorbing layer is continuously conveyed forwards, the elastic high polymer material is subjected to spinning after being melted at high temperature, and the spun elastic fiber filaments are directly compounded on the absorbing layer to form an elastic fiber layer; the wrapping layer is continuously conveyed forwards and alternately forms the absorption layer and the elastic fiber layer until the absorption layer and the elastic fiber layer reach the set number of layers; and finally, compounding a covering layer on the wrapping layer with the absorption layer and the elastic fiber layer to form the absorber.
In the forming method process, when the absorbing layer is formed, a defibering machine is used for defibering wood pulp raw materials and sending the wood pulp raw materials into a forming cover, meanwhile, SAP conveying devices are used for sending SAP raw materials into the forming cover, the SAP raw materials and the defibered wood pulp raw materials are mixed in the forming cover, formed mixed materials flow channels towards the surface of the forming box under the negative pressure adsorption effect of the forming box, and the mixed materials form the absorbing layer on a wrapping layer at an outlet of the forming cover. When the elastic fiber layer is formed, an extruder is used for carrying out high-temperature melting extrusion on the elastic high polymer material, a spinneret plate is arranged at a die head of the extruder for carrying out spinning, and the spun elastic fiber is directly compounded on the surface of the absorption layer to form the elastic fiber layer.
Wherein, the elastic high polymer material is PP (polypropylene) or PET (polyethylene terephthalate).
In the forming method, the absorption layer and the elastic fiber layer are respectively formed layer by layer through the forming cover and the fiber yarn spraying mechanism (mainly composed of an extruder and a spinneret plate) by utilizing the negative pressure adsorption effect of the forming box, the on-line continuous processing of the absorber can be realized, the process flow is simplified, and meanwhile, the number of the layers of the absorption layer and the elastic fiber layer can be correspondingly adjusted by adjusting the number of the outlets of the forming cover and the number of the fiber yarn spraying mechanisms according to the use requirements of different kinds of disposable sanitary products, so that the use is flexible; the absorption layer is made of the mixed raw materials of SAP and wood pulp, the absorption layer has good liquid absorption capacity and softness, the elastic fiber yarns are made of elastic high polymer materials to form the elastic fiber layer, the liquid absorption capacity of the absorption layer and the integral air permeability of the absorber can be effectively kept, and the stability of the structure of the absorption layer can be well maintained.
As mentioned above, the present invention can be better realized, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present disclosure are intended to be covered by the scope of the claims of the present invention.
Claims (7)
1. The absorber for the disposable sanitary product is characterized by comprising a wrapping layer, a covering layer, an absorbing layer and an elastic fiber layer, wherein an absorbing space of the absorber is formed between the inner side of the wrapping layer and the inner side of the covering layer, and at least one absorbing layer and at least one elastic fiber layer are arranged in the absorbing space; when the absorption layer and the elastic fiber layer are provided with a plurality of layers, the absorption layer and the elastic fiber layer are alternately distributed layer by layer;
the elastic fiber layer is a layered structure formed by side-by-side distribution of a plurality of continuous elastic fiber yarns, and each elastic fiber yarn is formed by high-temperature melting and then spinning; the material of the absorption layer is a mixed material of wood pulp and SAP;
when the absorber is formed, the forming method comprises the following steps: the wrapping layer is continuously conveyed by a forming box; defibering the wood pulp raw material and mixing the defibered wood pulp raw material with the SAP raw material to form a mixed material; forming an absorption layer on the wrapping layer by the mixed material by utilizing the negative pressure adsorption effect of the forming box; the wrapping layer with the absorbing layer is continuously conveyed forwards, the elastic high polymer material is subjected to spinning after being melted at high temperature, and the spun elastic fiber filaments are directly compounded on the absorbing layer to form an elastic fiber layer; the wrapping layer is continuously conveyed forwards and alternately forms the absorption layer and the elastic fiber layer until the absorption layer and the elastic fiber layer reach the set number of layers; and finally, compounding a covering layer on the wrapping layer with the absorption layer and the elastic fiber layer to form the absorber.
2. The absorbent for disposable sanitary products according to claim 1, wherein said absorbent layer is formed by first defibering a wood pulp raw material by a defibering machine and feeding the defibered wood pulp raw material into a forming hood, and simultaneously feeding an SAP material into the forming hood by an SAP feeding device, wherein the SAP material is mixed with the defibered wood pulp raw material in the forming hood, and the formed mixed material is fed to the surface flow channel of the forming box by a negative pressure adsorption of the forming box, and the mixed material forms the absorbent layer on the wrapping layer at an outlet of the forming hood.
3. The absorbent for disposable sanitary products according to claim 1, wherein the elastic fiber layer is formed by melt-extruding the elastic polymer material at a high temperature using an extruder, spinning the elastic polymer material by a spinneret provided at a die head of the extruder, and directly combining the spun elastic fiber filaments with the surface of the absorbent layer to form the elastic fiber layer.
4. The absorbent for disposable sanitary products according to claim 1, wherein said elastic polymer material is PP or PET.
5. The forming device for the absorber for disposable sanitary products according to any one of claims 1 to 4, comprising a defibrator, an SAP conveying mechanism, a forming cover, a fiber yarn ejecting mechanism and a forming box, wherein the forming box is a continuous conveying type negative pressure forming device, a wrapping layer conveying mechanism is arranged at the inlet end of the forming box, and a covering layer conveying mechanism is arranged at the outlet end of the forming box; the outlet of the forming cover and the outlet of the cellosilk spraying mechanism are sequentially arranged above the forming box along the conveying direction of the wrapping layer, and the defibrator and the SAP conveying mechanism are respectively connected with the forming cover; the absorbing layer is formed at the outlet of the forming cover, and the elastic fiber layer is formed at the outlet of the fiber yarn spraying mechanism.
6. The apparatus for forming an absorbent member for disposable sanitary products according to claim 5, wherein said forming hood has at least one outlet, and at least one filament spraying means, each outlet of the forming hood forms a layer of the absorbent layer, and each filament spraying means forms a layer of the elastic fiber layer;
when the forming cover is provided with a plurality of outlets, the forming cover is integrally in a comb-shaped structure, the upper part of the forming cover is a transverse main channel, the lower part of the forming cover is a plurality of longitudinal sub-channels which are distributed in parallel, the defibrator is arranged at one end of the transverse main channel, and each longitudinal sub-channel is connected with an SAP conveying mechanism.
7. The apparatus for forming an absorbent for disposable sanitary products according to claim 6, wherein said fiber yarn ejecting means comprises an extruder and a spinneret, the extruder is a screw extruder, the spinneret is a die head of the extruder, and the outlet end of the spinneret is a row of uniformly distributed ejecting holes.
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