CN112494216A - Composite absorption core and preparation method and application thereof - Google Patents
Composite absorption core and preparation method and application thereof Download PDFInfo
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- CN112494216A CN112494216A CN202011445530.9A CN202011445530A CN112494216A CN 112494216 A CN112494216 A CN 112494216A CN 202011445530 A CN202011445530 A CN 202011445530A CN 112494216 A CN112494216 A CN 112494216A
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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
- A61F13/535—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 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
- A61F13/536—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 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes having discontinuous areas of compression
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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
- A61F13/53—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
- A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F13/53708—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
- A61F13/53717—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the horizontal direction
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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
- A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F13/5376—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the performance of the layer, e.g. acquisition rate, distribution time, transfer time
-
- 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
- A61F2013/530437—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 a part with elevated absorption means
-
- 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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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
The invention discloses a composite absorption core and a preparation method thereof, wherein the composite absorption core comprises an upper layer material, a middle layer material and a lower layer material which are sequentially stacked, wherein a flow guide structure is arranged in the upper layer material, the flow guide structure comprises a plurality of first strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction, and a first resin layer is arranged on each of the first strip-shaped wood pulp layers; the middle layer material comprises an absorption base layer, and at least one second resin layer is arranged on the absorption base layer; the lower layer material comprises a plurality of second strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction. The composite absorption core body is novel and stable in structure, good in flow guide effect and excellent in liquid conduction capacity, and greatly improves use comfort. The composite absorption core body provided by the invention can be applied to sanitary products, including infant paper diapers, pull-up pants, sanitary towels, menstrual period pants, adult paper diapers, incontinence pants and urine isolation pads.
Description
Technical Field
The invention relates to the technical field of disposable hygienic products, in particular to a composite absorption core body and a preparation method and application thereof.
Background
Disposable sanitary articles such as sanitary napkins, baby diapers, adult diapers, baby pull-ups, adult pull-ups and the like generally have a multilayer structure, the absorption area mainly comprises a surface coating (surface layer, flow guiding layer), an absorption core and a basement membrane from inside to outside. The quality of the absorbent core can have a crucial influence on the quality of the product. The manufacturing method of the absorption core of the common product is as follows: the wood pulp is crushed by a crusher, then mixed with high polymers in a forming bin to form the wood pulp, and finally formed into the core body through a template. The product obtained by the core manufacturing method has simple structure layer, only the wood pulp is mixed with the polymer, although the common use performance can be achieved, the absorption core is greatly surrounded in the market for improving the core quality, and the absorption core is required to be improved in the aspects of use performance or touch feeling.
The performance of the absorbent core is mainly considered by the following important indexes, including absorption capacity, absorption speed, reverse osmosis capacity, multiple absorption capacity, structural stability and the like, wherein the absorption capacity is mainly determined by the distribution, quality and weight of macromolecules in the core, the absorption speed is determined by the liquid conductivity of the core, and the absorption capacity of the macromolecules can be fully released because the macromolecules of the common core are uniformly distributed in the core and the macromolecules in the middle of the core are fully contacted with the liquid. The macromolecule close to the two sides of the core body mainly absorbs the conducted liquid, and generally the absorption capacity can not be fully released. The conductivity of a core will determine the absorption capacity and absorption speed of the core, and thus the conductivity of the core is critical to the core. However, current absorbent cores have poor conductivity.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the composite absorption core which is novel and stable in structure, good in flow guide effect and excellent in liquid conduction capacity, and greatly improves the use comfort.
The second purpose of the invention is to provide a preparation method of the composite absorption core body, which has reasonable flow and simple and convenient operation and is suitable for industrial production.
The invention also aims to apply the composite absorption core body to sanitary products.
One of the purposes of the invention is realized by adopting the following technical scheme:
a composite absorption core body comprises an upper layer material, a middle layer material and a lower layer material which are sequentially stacked, wherein a flow guide structure is arranged in the upper layer material, the flow guide structure comprises a plurality of first strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction, and a first resin layer is arranged on each of the first strip-shaped wood pulp layers; the middle layer material comprises an absorption base layer, and at least one second resin layer is arranged on the absorption base layer; the lower layer material comprises a plurality of second strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction.
After the composite absorption core body absorbs liquid, the polymer resin layer in the upper layer material expands, and the polymer resin layers distributed in a strip shape form semicircular convex hulls, so that grooves are formed among the polymer resin strips, certain gaps are formed among adjacent grooves, the gaps play a good flow guiding role, and after the absorption core body absorbs liquid, the groove gaps play an active role in quickly achieving a dry and comfortable effect on the surface of the core body. Meanwhile, the high polymer resin convex hull is beneficial to reducing the contact area between the surface of the core body and the skin, so that the probability of generation of red buttocks of children is reduced.
And, be provided with first bar wood pulp layer below the polymer resin layer in the upper strata material, first bar wood pulp layer plays fine bearing effect to first resin layer. After the absorption core absorbed liquid, first resin layer imbibition rapidly and conducted on first bar wood pulp layer, first bar wood pulp layer was favorable to the conduction, the diffusion and the storage of liquid. In the upper strata material, the macromolecular resin that the strip distributes for the mode of applying macromolecular resin comprehensively, bar structure wood pulp layer can play the fixed action to macromolecular resin, and macromolecular resin broadcasts on the wood pulp layer for macromolecular resin is more difficult to scatter, increases bar macromolecular resin's diffusion conductivity simultaneously, also reduces the granular sensation of core. Preferably, the first resin layer in the upper layer material covers the first stripe-shaped wood pulp layer, that is, the width of the first resin layer is larger than that of the first stripe-shaped wood pulp layer, so as to fully exert the liquid-absorbing capacity of the polymer resin.
The intermediate layer material is provided with at least one second resin layer on the absorption base layer, and the second resin layer can play the fixed action to the absorption base layer, avoids absorbing the basic layer skew off position, improves the stability of product. The second resin layer is a fully applied resin layer, and the liquid is guided by the first resin layer and reaches the intermediate layer material to be absorbed and stored by the absorption base layer and the second resin layer to the maximum extent, unlike the first resin layer which is distributed in a strip shape. And the lower floor material also is provided with the wood pulp layer that the bar distributes, plays fine stock solution effect, and liquid diffusion conductivity is good, and the setting of bar distribution can compromise the compliance of product simultaneously, promotes and uses the travelling comfort.
Before the absorption core body absorbs liquid, the first resin layer of the upper layer material, the first strip-shaped wood pulp layer and the second strip-shaped wood pulp layer of the lower layer material are strip-shaped, the surfaces of the first resin layer, the first strip-shaped wood pulp layer and the second strip-shaped wood pulp layer can be flat, and after the absorption core body absorbs liquid, the first resin layer, the first strip-shaped wood pulp layer and the second strip-shaped wood pulp layer protrude to form bulges.
Further, the first strip-shaped wood pulp layer and the second strip-shaped wood pulp layer are overlapped or parallel with each other in the horizontal projection direction, but are not perpendicular to each other. That is, the extending directions of the first strip-shaped wood pulp layer and the second strip-shaped wood pulp layer are consistent. Preferably, for a single wood pulp layer, the width of the second wood pulp strip layer is greater than that of the first wood pulp strip layer, and the grammage of the second wood pulp strip layer is greater than that of the first wood pulp strip layer, so that the overall structure of the product is more stable, and the liquid diffusion and conduction capabilities are better.
Further, the upper layer material further comprises a first carrier layer and a second carrier layer, and the diversion structure is arranged between the first carrier layer and the second carrier layer; the first carrier layer is spun-bonded non-woven fabric, hot air non-woven fabric or toilet paper; the second carrier layer is spun-bonded non-woven fabric, hot-air non-woven fabric or toilet paper. The spun-bonded non-woven fabric, the hot air non-woven fabric or the toilet paper has good air permeability and liquid permeability, so that the absorption performance of the absorption core body is better, and the wearing comfort is improved.
Further, the first strip-shaped wood pulp layer is a fluff pulp fiber layer, and the length of the fluff pulp fiber is 1-5 mm; the width of each first strip-shaped wood pulp layer is 1-20mm, and the distance between every two adjacent first strip-shaped wood pulp layers is 1-50 mm; the width of the first resin layer is 3-18 mm. Within these parameters, the liquid absorption capacity, liquid transmission capacity and wearing comfort are all satisfied.
Further, the number of the second resin layers is two, and the two second resin layers are respectively arranged above and below the absorption base layer; that is to say, partly polymer resin is evenly applyed in the top of absorbing the basic unit, and another part polymer resin is evenly applyed in the below of absorbing the basic unit, and polymer resin fixes on absorbing the basic unit, can avoid the skew position of running, and product stable in structure. Preferably, the absorption base layer is a fluffy non-woven fabric layer, the square gram weight of the fluffy non-woven fabric is between 30 and 55gsm, and the thickness of the fluffy non-woven fabric is between 3 and 10 mm. The fluffy non-woven fabric layer comprises three-dimensional hollow crimped fibers and ES fibers, the three-dimensional hollow crimped fibers are good in stiffness, the three-dimensional hollow crimped fibers with the specification of 7D x 64mm can be selected, and the specific material can be terylene; the ES fibres preferably have a gauge of 4D by 64 mm. Preferably, the mixing proportion of the three-dimensional hollow crimped fibers is larger than that of the ES fibers, for example, 70% of the three-dimensional hollow crimped fibers and 30% of the ES fibers, although other suitable proportions can be adopted, such as 50-80% of the three-dimensional hollow crimped fibers and 20-50% of the ES fibers.
Further, the lower layer material comprises a third carrier layer and a fourth carrier layer, and a plurality of second strip-shaped wood pulp layers are arranged between the third carrier layer and the fourth carrier layer; the third carrier layer is spun-bonded non-woven fabric, hot air non-woven fabric or toilet paper; the fourth carrier layer is spun-bonded non-woven fabric, hot-air non-woven fabric or toilet paper. The spun-bonded non-woven fabric, the hot air non-woven fabric or the toilet paper has good air permeability and liquid permeability, so that the absorption performance of the absorption core body is better, and the wearing comfort is improved.
Furthermore, the width of each of the second strip-shaped wood pulp layers is 5-30mm, and the distance between every two adjacent second strip-shaped wood pulp layers is 10-20 mm. The second bar wood pulp layer plays fine stock solution, drain effect, takes the mode that the bar distributes simultaneously, especially in the parameter that sets up of the aforesaid injecing, can avoid product hardness great, ensures that the product is soft comfortable.
Further, in the lower layer material, a third resin layer is arranged on the second strip-shaped wood pulp layer. That is, the second strip-shaped wood pulp layer may be sprayed with a polymer resin to further improve the liquid-absorbing ability.
Furthermore, a hot melt adhesive layer is arranged among the upper layer material, the middle layer material and the lower layer material. Carry out the product through the hot melt adhesive and compound, product stable in structure, and production is convenient.
The second purpose of the invention is realized by adopting the following technical scheme:
a preparation method of a composite absorption core body comprises an upper layer material, a middle layer material and a lower layer material which are sequentially stacked, wherein the upper layer material comprises a first carrier layer, a second carrier layer and a diversion structure arranged between the first carrier layer and the second carrier layer, the diversion structure comprises a plurality of first strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction, and a first resin layer covers the first strip-shaped wood pulp layers; the middle layer material comprises an absorption base layer, and second resin layers are arranged above and below the absorption base layer; the lower layer material comprises a third carrier layer and a fourth carrier layer, and a plurality of second strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction are arranged between the third carrier layer and the fourth carrier layer; the method comprises the following steps:
the upper layer material manufacturing step: crushing and defibrating wood pulp raw materials into fluff pulp fibers, arranging the fluff pulp fibers on a second carrier layer to form a plurality of first strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction on the second carrier layer, and then broadcasting resin on the first strip-shaped wood pulp layers to form the first resin layers covering the first strip-shaped wood pulp layers; then spraying hot melt adhesive on the first carrier layer, and compounding the first carrier layer attached with the hot melt adhesive and the second carrier layer attached with the diversion structure to form an upper layer material;
the manufacturing steps of the lower layer material are as follows: crushing and defibrating wood pulp raw materials into fluff pulp fibers, and arranging the fluff pulp fibers on the fourth carrier layer to form a plurality of second strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction on the fourth carrier layer; spraying a hot melt adhesive on the third carrier layer, and compounding the third carrier layer attached with the hot melt adhesive and the fourth carrier layer attached with the second strip-shaped wood pulp layer to form a lower layer material;
the intermediate layer material preparation step: broadcasting resin below the absorption base layer to form a second resin layer below the absorption base layer; spraying hot melt adhesive on the lower layer material, and compounding the lower layer material attached with the hot melt adhesive and the absorption base layer attached with the second resin layer below to form a first semi-finished product;
compounding: spreading resin above the absorption base layer to form a second resin layer above the absorption base layer to obtain a second semi-finished product; and spraying hot melt adhesive on the upper layer material, and compounding the upper layer material attached with the hot melt adhesive with the second semi-finished product to obtain the composite material.
In the production process, one-time smooth production can be realized through the combined production line, under the action of the traction roller, the product is gradually formed until the final output is realized, and a hot-cutting edge sealing mode is adopted when the product is cut.
Further, the first carrier layer, the second carrier layer, the third carrier layer and the fourth carrier layer are all spun-bonded non-woven fabrics, hot-air non-woven fabrics or toilet paper; the absorbing base layer is a fluffy non-woven fabric layer, and the fluffy non-woven fabric layer comprises three-dimensional hollow crimped fibers and ES fibers.
The third purpose of the invention is realized by adopting the following technical scheme:
the composite absorption core body is applied to sanitary products, and comprises infant paper diapers, infant pull-ups, adult sanitary towels, menstrual period pants, adult paper diapers, adult incontinence pants, adult pull-ups and urine insulation pads.
Compared with the prior art, the invention has the beneficial effects that:
(1) the composite absorption core body provided by the invention is characterized in that a diversion structure is arranged in an upper layer material, and the diversion structure comprises a plurality of first strip-shaped wood pulp layers and first resin layers covering the first strip-shaped wood pulp layers; the polymer resin layer in the upper strata material is the strip distribution of layer promptly, the conductibility of core can be increased to this kind of structure, the polymer resin absorbed amount of the whole section position department of make full use of core, strip polymer resin is after absorbing liquid, the volume sharply expands, each polymer resin strip all forms independent convex closure, form strip slot between the polymer resin strip, have certain water conservancy diversion effect to liquid, certain gas permeability has simultaneously, make the core surface become dry and comfortable more easily, strip slot also helps reducing the area of contact of skin and urine trousers, thereby reduce the probability that child's red butt produced. Moreover, the high polymer resin is spread on the wood pulp, the high polymer resin is not easy to scatter, meanwhile, the strip-shaped wood pulp layer can increase the diffusion and conduction performance of the strip-shaped resin layer, and the granular sensation of the core body is also reduced.
(2) According to the composite absorption core provided by the invention, the middle layer material comprises the absorption base layer, at least one second resin layer is arranged on the absorption base layer, and the resin layer applied on the absorption base layer can be fixed on the absorption base layer, so that dislocation is avoided. And the second resin layer is a resin layer which is applied on the whole, is not in strip distribution, has larger distribution area, and can absorb liquid to the maximum extent and store the liquid.
(3) According to the composite absorbing core body provided by the invention, the lower layer material is also provided with the wood pulp layer in strip distribution, the strip wood pulp can play a good role in storing liquid, the diffusion and conduction capacity of liquid on the wood pulp is good, and meanwhile, the flexibility of the product can be considered in the arrangement mode of strip distribution, so that the use comfort is improved.
Drawings
FIG. 1 is a cross-sectional view of a composite absorbent core provided in example 1 of the present invention;
FIG. 2 is a top view of a composite absorbent core baffle structure provided in example 1 of the present invention;
figure 3 is a cross-sectional view of an absorbent core according to comparative example 1 of the present invention.
In the figure: 11. a first strip-shaped wood pulp layer; 12. a first resin layer; 13. a first carrier layer; 14. a second carrier layer; 21. an absorbent substrate; 22. a second resin layer; 31. a second strip-shaped wood pulp layer; 32. a third carrier layer; 33. a fourth carrier layer; 40. hot melt adhesive; 51. a first dust-free paper; 52. a first polymer resin; 53. fluffy cotton; 54. a second polymer resin; 55. a second dust-free paper.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. The embodiments are merely examples for verifying the technical effects of the invention and are not exhaustive.
The composite absorbing core provided by the embodiment of the invention has better performance than the existing absorbing core, has better effects including liquid conduction, liquid storage, liquid diffusion, structural stability, use comfort and the like, improves the performance by more than 50%, has good hand feeling, is dry and comfortable, and has high repeated absorbing speed. Specifically, the macromolecular resin laid on the wood pulp in the upper layer material can absorb liquid and then quickly form expanded strip-shaped channels, so that the liquid is dredged in the MD direction, the utilization rate of the core body is improved, and meanwhile, the groove part can reduce the contact area with the skin and reduce the humidity of the skin. Simultaneously, body surface humidity can promote the travelling comfort through recess passageway exhaust moisture.
Example 1
As shown in fig. 1-2, a method for preparing a composite absorbent core, the composite absorbent core comprises an upper layer material, a middle layer material and a lower layer material which are sequentially stacked, the upper layer material comprises a first carrier layer 13, a second carrier layer 14 and a diversion structure arranged between the first carrier layer 13 and the second carrier layer 14, the diversion structure comprises a plurality of first strip-shaped wood pulp layers 11 which are sequentially arranged along a horizontal direction, the width of each first strip-shaped wood pulp layer 11 is 10mm, the distance between two adjacent first strip-shaped wood pulp layers 11 is 10mm, a plurality of first strip-shaped wood pulp layers 11 are covered with first resin layers 12, and the spreading width of each first resin layer 12 is 8 mm; the middle layer material comprises an absorption base layer 21, the absorption base layer 21 is fluffy non-woven fabric and consists of 70% of three-dimensional hollow curled terylene and 30% of ES fibers, and second resin layers 22 are arranged above and below the absorption base layer 21; the lower layer material comprises a third carrier layer 32 and a fourth carrier layer 33, a plurality of second strip-shaped wood pulp layers 31 which are sequentially arranged along the horizontal direction are arranged between the third carrier layer 32 and the fourth carrier layer 33, the width of each second strip-shaped wood pulp layer 31 is 20mm, and the distance between every two adjacent second strip-shaped wood pulp layers 31 is 15 mm; the method comprises the following steps:
the upper layer material manufacturing step: crushing and defibrating wood pulp raw materials into fluff pulp fibers, arranging the fluff pulp fibers on a second carrier layer 14 to form a plurality of first strip-shaped wood pulp layers 11 which are sequentially arranged along the horizontal direction on the second carrier layer 14, and then broadcasting resin on the first strip-shaped wood pulp layers 11 to form a first resin layer 12 covering the first strip-shaped wood pulp layers 11; then spraying hot melt adhesive 40 on the first carrier layer 13, and compounding the first carrier layer 13 attached with the hot melt adhesive 40 and the second carrier layer 14 attached with the diversion structure to form an upper layer material;
the manufacturing steps of the lower layer material are as follows: crushing and defibrating wood pulp raw materials into fluff pulp fibers, and arranging the fluff pulp fibers on a fourth carrier layer 33, so that a plurality of second strip-shaped wood pulp layers 31 which are sequentially arranged along the horizontal direction are formed on the fourth carrier layer 33; then spraying hot melt adhesive 40 on the third carrier layer 32, and compounding the third carrier layer 32 attached with the hot melt adhesive 40 and the fourth carrier layer 33 attached with the second strip-shaped wood pulp layer 31 to form a lower layer material;
the intermediate layer material preparation step: spreading resin under the absorption base layer 21 to form a second resin layer 22 under the absorption base layer 21; spraying a hot melt adhesive 40 on the lower layer material, and compounding the lower layer material attached with the hot melt adhesive 40 and the absorption base layer 21 attached with the second resin layer 22 below to form a first semi-finished product;
compounding: spreading resin on the first semi-finished product above the absorption base layer 21 to form a second resin layer 22 above the absorption base layer 21 to obtain a second semi-finished product; spraying the hot melt adhesive 40 on the upper layer material, and compounding the upper layer material attached with the hot melt adhesive 40 with the second semi-finished product to obtain the composite material.
Specific choices of materials used in example 1 are shown in table 1 below:
table 1 example 1 table of materials for composite absorbent core
Example 2
Example 2 differs from example 1 in that: the specific selection of each material layer is detailed in table 2 below.
Table 2 example 2 table of materials for composite absorbent core
The rest is the same as in embodiment 1.
Example 3
Example 3 differs from example 1 in that: in the upper layer material, the width of the first strip-shaped wood pulp layer is 15mm, the distance between two adjacent first strip-shaped wood pulp layers is 25mm, and the broadcast width of the first resin layer is 18 mm; in the lower layer material, the width of the second strip-shaped wood pulp layer is 30mm, and the distance between two adjacent second strip-shaped wood pulp layers is 20 mm.
The rest is the same as in embodiment 1.
Example 4
Example 4 differs from example 1 in that: in the upper layer material, the width of the first strip-shaped wood pulp layer is 1mm, the distance between two adjacent first strip-shaped wood pulp layers is 1mm, and the broadcast sowing width of the first resin layer is 3 mm; in the lower layer material, the width of the second strip-shaped wood pulp layer is 5mm, and the distance between two adjacent second strip-shaped wood pulp layers is 10 mm.
The rest is the same as in embodiment 1.
Example 5
Example 5 differs from example 1 in that: in the upper layer material, the width of the first strip-shaped wood pulp layer is 20mm, the distance between two adjacent first strip-shaped wood pulp layers is 50mm, and the broadcast sowing width of the first resin layer is 15 mm; in the lower layer material, the width of the second strip-shaped wood pulp layer is 30mm, and the distance between two adjacent second strip-shaped wood pulp layers is 18 mm.
The rest is the same as in embodiment 1.
Example 6
Example 6 differs from example 1 in that: in the middle layer material, the fluffy non-woven fabric is composed of 55% of three-dimensional hollow curled terylene and 45% of ES fiber.
The rest is the same as in embodiment 1.
Example 7
Example 7 differs from example 1 in that: the specific selection of each material layer is detailed in table 3 below.
Table 3 table of materials for composite absorbent core of example 7
The rest is the same as in embodiment 1.
Example 8
Example 8 differs from example 1 in that: the specific selection of each material layer is detailed in table 4 below.
Table 4 example 8 table of materials for composite absorbent core
The rest is the same as in embodiment 1.
Comparative example 1
As shown in fig. 3, an absorbent core comprises five layers from top to bottom: the dust-free paper comprises a first dust-free paper 51, a first polymer resin 52, fluffy cotton 53, a second polymer resin 54 and a second dust-free paper 55, wherein the five layers of structures are compounded into a whole through hot melt adhesive. The specific material information table is shown in table 5 below.
Table 5 table of materials for the absorbent core of comparative example 1
| Material layer | Type of material | Density gsm | Suppliers of goods |
| Layer 1 | Dust- |
40 | Jinjiang Boyuan |
| Layer 2 | Polymer resin | 140 | BASF 7059 |
| Layer 3 | |
40 | Fujiangteng |
| Layer 4 | Polymer resin | 140 | Rooster 60s |
| Layer 5 | Dust- |
40 | Jinjiang Boyuan |
| Adhesive agent | / | Fule 1888 |
Comparative example 2
Comparative example 2 differs from example 1 in that: in the upper layer material, the first resin layer is directly arranged on the second carrier layer, and the first strip-shaped wood pulp layer is not adopted for carrying.
The rest is the same as in embodiment 1.
Comparative example 3
Comparative example 3 differs from example 1 in that: in the upper layer material, the polymer resin layer and the wood pulp layer are both completely applied, namely the wood pulp layer is uniformly laid on the second carrier layer, and the polymer resin layer is uniformly laid on the wood pulp layer completely applied. That is, the polymer resin layer and the wood pulp layer of the upper layer material are not in a strip arrangement.
The rest is the same as in embodiment 1.
Comparative example 4
Comparative example 4 differs from example 1 in that: in the intermediate layer material, the bulky nonwoven fabric is not provided with a resin layer, i.e. the intermediate layer material is formed only by the bulky nonwoven fabric layer.
The rest is the same as in embodiment 1.
Comparative example 5
Comparative example 5 differs from example 1 in that: in the interlayer material, no bulky nonwoven fabric is provided, only the resin layer applied overall, i.e. the interlayer material is formed only by the second resin layer.
The rest is the same as in embodiment 1.
Comparative example 6
Comparative example 6 differs from example 1 in that: in the lower layer material, the wood pulp layer is applied in a full-scale manner, i.e. the wood pulp layer is uniformly laid on the fourth carrier layer. That is, the wood pulp layer of the underlying material does not take a strip-like arrangement.
The rest is the same as in embodiment 1.
Comparative example 7
Comparative example 7 differs from example 1 in that: in the upper layer material, the width of the first strip-shaped wood pulp layer is 25mm, the distance between two adjacent first strip-shaped wood pulp layers is 60mm, and the broadcasting width of the first resin layer is 20 mm; in the lower layer material, the width of the second strip-shaped wood pulp layer is 3mm, and the distance between two adjacent second strip-shaped wood pulp layers is 25 mm.
The rest is the same as in embodiment 1.
Comparative example 8
Comparative example 8 differs from example 1 in that: in the upper layer material, the width of the first strip-shaped wood pulp layer is 30mm, the distance between two adjacent first strip-shaped wood pulp layers is 70mm, and the broadcast sowing width of the first resin layer is 2 mm; in the lower layer material, the width of the second strip-shaped wood pulp layer is 35mm, and the distance between two adjacent second strip-shaped wood pulp layers is 5 mm.
The rest is the same as in embodiment 1.
Effect testing
The absorbent cores obtained in examples 1 to 8 and comparative examples 1 to 8 were each cut into a rectangular test piece 400mm in length and 100mm in width, and the center line was used as a liquid injection point. A hollow cylindrical glass tube having an inner diameter of 60mm (outer diameter of 70mm, height of 100mm) was placed at the injection point, 80ml of 0.9% physiological saline was injected at 0min and 5min, respectively, and the time taken for the liquid in the hollow cylinder to be absorbed by the absorbent core was recorded as the 1 st absorption rate and the 2 nd absorption rate, respectively. And, the diffusion distance of the liquid in the MD direction in the core body is measured at the 4 th min and the 11 th min, respectively; after 10min, 20g of filter paper (diameter 100mm) was weighed and placed on the injection site, and a 1.2kg (diameter 90mm) weight was placed on the filter paper, and the filter paper was weighed to increase the weight by the amount of rewet after 1min of pressurization. The test results are shown in table 6 below.
Table 6 results of tests on absorbent cores of examples 1 to 8 and comparative examples 1 to 8 are shown in the table
As can be seen from the table 1, the composite absorbent cores of examples 1 to 8 all achieved good results in the indices of absorption rate, reverse osmosis amount and diffusion length, which are superior to those of the comparative examples. The strip-shaped polymer resin on the upper layer of the absorption core body of the embodiment 1-8 forms convex hulls after receiving liquid, grooves among the convex hulls can guide the flow and promote the surface to be dry and comfortable quickly, the middle layer adopts a setting mode of fluffy non-woven fabric and two resin layers, the liquid absorption speed is high, the conductivity is strong, the lower layer of material adopts a setting mode of strip-shaped wood pulp, and the liquid storage effect is good. The overall structure of the composite absorbing core product of the embodiment 1-8 is reasonable, especially the middle resin layer is fully applied above and below the fluffy non-woven fabric, the structural stability is greatly improved, the deviation and the dislocation phenomenon are not easy to occur between the components, and the performance of quick drying, liquid absorption, conduction and the like is further promoted.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. A composite absorption core body is characterized by comprising an upper layer material, a middle layer material and a lower layer material which are sequentially stacked, wherein a flow guide structure is arranged in the upper layer material, the flow guide structure comprises a plurality of first strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction, and a first resin layer is arranged on each of the first strip-shaped wood pulp layers; the middle layer material comprises an absorption base layer, and at least one second resin layer is arranged on the absorption base layer; the lower layer material comprises a plurality of second strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction.
2. The composite absorbent core according to claim 1 wherein said topsheet further comprises a first carrier layer and a second carrier layer, said fluid directing structure being disposed between said first carrier layer and said second carrier layer; the first carrier layer is spun-bonded non-woven fabric, hot air non-woven fabric or toilet paper; the second carrier layer is spun-bonded non-woven fabric, hot-air non-woven fabric or toilet paper.
3. The composite absorbent core of claim 1, wherein said first layer of linear wood pulp is a layer of fluff pulp fibers, said fluff pulp fibers having a length of from 1 to 5 mm; the width of each first strip-shaped wood pulp layer is 1-20mm, and the distance between every two adjacent first strip-shaped wood pulp layers is 1-50 mm; the width of the first resin layer is 3-18 mm.
4. The composite absorbent core according to claim 1, wherein said second resin layers are two in number, said two second resin layers being disposed above and below said absorbent base layer, respectively; the absorbing base layer is a fluffy non-woven fabric layer, and the fluffy non-woven fabric layer comprises three-dimensional hollow crimped fibers and ES fibers.
5. The composite absorbent core according to claim 1, wherein said lower layer of material comprises a third carrier layer and a fourth carrier layer, a plurality of said second strip-shaped layers of wood pulp being disposed between said third carrier layer and said fourth carrier layer; the third carrier layer is spun-bonded non-woven fabric, hot air non-woven fabric or toilet paper; the fourth carrier layer is spun-bonded non-woven fabric, hot-air non-woven fabric or toilet paper.
6. The composite absorbent core according to claim 1, wherein each of a plurality of said second wood pulp strips has a width of 5-30mm, and the distance between two adjacent second wood pulp strips is 10-20 mm.
7. A composite absorbent core according to claim 1, wherein a third resin layer is provided on said second strip-shaped pulp layer in said lower layer of material.
8. The preparation method of the composite absorption core is characterized in that the composite absorption core comprises an upper layer material, a middle layer material and a lower layer material which are sequentially stacked, wherein the upper layer material comprises a first carrier layer, a second carrier layer and a diversion structure arranged between the first carrier layer and the second carrier layer, the diversion structure comprises a plurality of first strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction, and first resin layers are arranged on the first strip-shaped wood pulp layers; the middle layer material comprises an absorption base layer, and second resin layers are arranged above and below the absorption base layer; the lower layer material comprises a third carrier layer and a fourth carrier layer, and a plurality of second strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction are arranged between the third carrier layer and the fourth carrier layer; the method comprises the following steps:
the upper layer material manufacturing step: crushing and defibrating wood pulp raw materials into fluff pulp fibers, arranging the fluff pulp fibers on a second carrier layer to form a plurality of first strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction on the second carrier layer, and then broadcasting resin on the first strip-shaped wood pulp layers to form the first resin layers covering the first strip-shaped wood pulp layers; then spraying hot melt adhesive on the first carrier layer, and compounding the first carrier layer attached with the hot melt adhesive and the second carrier layer attached with the diversion structure to form an upper layer material;
the manufacturing steps of the lower layer material are as follows: crushing and defibrating wood pulp raw materials into fluff pulp fibers, and arranging the fluff pulp fibers on the fourth carrier layer to form a plurality of second strip-shaped wood pulp layers which are sequentially arranged along the horizontal direction on the fourth carrier layer; spraying a hot melt adhesive on the third carrier layer, and compounding the third carrier layer attached with the hot melt adhesive and the fourth carrier layer attached with the second strip-shaped wood pulp layer to form a lower layer material;
the intermediate layer material preparation step: broadcasting resin below the absorption base layer to form a second resin layer below the absorption base layer; spraying hot melt adhesive on the lower layer material, and compounding the lower layer material attached with the hot melt adhesive and the absorption base layer attached with the second resin layer below to form a first semi-finished product;
compounding: spreading resin above the absorption base layer to form a second resin layer above the absorption base layer to obtain a second semi-finished product; and spraying hot melt adhesive on the upper layer material, and compounding the upper layer material attached with the hot melt adhesive with the second semi-finished product to obtain the composite material.
9. The method of making a composite absorbent core according to claim 8 wherein said first carrier layer, said second carrier layer, said third carrier layer and said fourth carrier layer are all spunbond nonwoven, through air nonwoven or toilet paper; the absorbing base layer is a fluffy non-woven fabric layer, and the fluffy non-woven fabric layer comprises three-dimensional hollow crimped fibers and ES fibers.
10. Use of a composite absorbent core according to any of claims 1 to 7 in hygiene articles, including diapers for infants, training pants, sanitary napkins, menstrual pants, adult diapers, incontinence pants and urine barriers.
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| CN202011445530.9A CN112494216A (en) | 2020-12-11 | 2020-12-11 | Composite absorption core and preparation method and application thereof |
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Cited By (1)
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