CN111529214A - Core with functions of guiding diffusion and preventing particles from sliding and preparation method - Google Patents
Core with functions of guiding diffusion and preventing particles from sliding and preparation method Download PDFInfo
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- CN111529214A CN111529214A CN202010306202.4A CN202010306202A CN111529214A CN 111529214 A CN111529214 A CN 111529214A CN 202010306202 A CN202010306202 A CN 202010306202A CN 111529214 A CN111529214 A CN 111529214A
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- woven material
- core
- layer
- woven
- sap
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Classifications
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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
- A61F13/15577—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
- A61F2013/15715—Shaping or making outer layers
-
- 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
Abstract
The invention discloses a core body with the functions of guiding flow, diffusing and preventing particles from sliding and a preparation method thereof. The core body sequentially comprises an upper layer of non-woven material, an SAP particle layer and a lower layer of non-woven material from top to bottom. The core body is formed by scattering SAP particles on a lower layer of non-woven material, laying an upper layer of non-woven material on the lower layer of non-woven material, overlapping the upper layer of non-woven material, feeding the non-woven material into a special needle-arranging needle machine for reinforcement, and arranging guide grooves with different shapes on the core body. The invention has simple structure, reasonable design and convenient production.
Description
Technical Field
The invention relates to a preparation method of an absorption core body, and belongs to the technical field of disposable hygienic products.
Background
The absorption core body is the core structure of disposable sanitary products such as sanitary napkins, baby diapers and the like, most of composite core bodies used by commercially sold paper diapers and sanitary napkins are formed by mixing fluff pulp and super absorbent resin, but the core body has the big defect that super absorbent resin particles can roll in the core body, so that gel generated after liquid is absorbed is stacked and layered, and the comfort when the disposable sanitary napkins are worn is influenced. A large amount of hot melt adhesive is often added in order to keep the particles from slipping, and the excessive use of hot melt adhesive can make the product feel hard, and the liquid absorption speed and the air permeability can be affected.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: improves the existing composite core body technology and provides a core body with the functions of guiding flow, diffusing and preventing particles from sliding.
In order to solve the technical problems, the invention provides a core body with the functions of guiding flow, diffusing and preventing particles from sliding, which sequentially comprises an upper layer non-woven material, an SAP particle layer and a lower layer non-woven material from top to bottom, and is characterized in that:
the upper layer of non-woven material is non-woven fabric made by any one of needling, spunlace and hot air technology or fiber web directly output by a carding machine or an air-laid machine; the upper layer of non-woven material is provided with a diversion trench;
the SAP particle layer is formed by laying water-absorbent resin particles;
the lower layer non-woven material is non-woven fabric made by any one of spun-bonding, hot air and spunlace technology or fiber web directly output by a carding machine or an air-laid machine;
the core body is formed by three layers of needling of an upper layer of non-woven material, an SAP particle layer and a lower layer of non-woven material, and fiber bundles formed by needling in the upper layer of non-woven material penetrate through the SAP particle layer and are entangled with the lower layer of non-woven material, and the fiber bundles are arranged in a rectangular shape along the length direction of the core body to form a lattice cage for fixing the SAP particles.
Preferably, the upper and lower layers of nonwoven material are made of common chemical and natural fibers by different nonwoven technologies; the upper layer non-woven material is non-woven fabric made by needle punching, water jet, hot air technology or fiber web made by carding and air flow; the lower layer nonwoven is a nonwoven made by spunbond, hot air, hydroentangling techniques or a web made by carding and air-laying.
More preferablyThe upper layer of non-woven material adopts fibers of one of polypropylene and polyethylene and one of cotton and viscose, and the surface density of the fibers is 40-150 g/m2(ii) a The lower non-woven material adopts any one of polypropylene, polyethylene, viscose and cotton as fiber, and the surface density of the lower non-woven material is 10-60 g/m2。
Preferably, the SAP particle layer is a particle layer formed by stacking one or more water-absorbent resins with different shapes and different absorption capacities, and the particle diameter is 150-300 meshes.
Preferably, the SAP particle layer is formed by uniformly spreading the SAP particle layer on the lower nonwoven material with the water-absorbent resin particles present on the surface or inside thereof by means of a hopper; the upper layer non-woven material and the lower layer non-woven material are consolidated together by a needle punching method; the diversion trench is made by hot rolling, point bonding or ultrasonic bonding.
More preferably, the water-absorbent resin particles are held by lattices in which pinholes obtained by needling and reinforcing the upper layer nonwoven material and the lower layer nonwoven material in different needle arrangement patterns are arranged in different shapes.
More preferably, the shape of the diversion trench is polygonal, curved or petal-shaped
The invention also provides a preparation method of the core body with the functions of guiding diffusion and preventing particle sliding, which is characterized by comprising the following steps:
step 1): preparation of the upper layer nonwoven material:
one of polypropylene and polyethylene and one of cotton and viscose are mixed, and the mixture is prepared into the fabric with the surface density of 40-150 g/m by needling, spunlace and hot air technology2The non-woven fabric is directly carded or air-laid to obtain the non-woven fabric with the surface density of 40-150 g/m2The web of (a);
step 2): preparation of the lower layer nonwoven:
the surface density of the material is 10-60 g/m by adopting any one of polypropylene, polyethylene, viscose and cotton as a material and adopting the technologies of spun bonding, hot air and spunlace2The non-woven fabric is directly carded or air-laid to obtain the surface density10 to 60g/m2The web of (a).
Step 3): compounding of SAP particle layers:
the method comprises the following steps of enabling a prepared lower-layer non-woven material coiled material or a fiber web made by carding and air-laid to reach the lower part of an SAP hopper under the driving of a net conveying curtain, uniformly spreading SAP particles, then laying the prepared upper-layer non-woven material coiled material or the fiber web made by carding and air-laid on the upper part of a core bottom layer, feeding the core into a needle machine for needling composition, enabling a punched lattice cage type three-dimensional structure to be just capable of fixing the SAP particles in the core, and finally forming a diversion trench on the core in a hot rolling, point bonding or ultrasonic bonding mode.
Preferably, the needle arrangement rule of the needle machine in the step 3) is as follows: the needles of the first needle machine are arranged along the longitudinal direction along the production direction, and the distance between every two rows of needles is 2-10 cm; the needles of the second needle machine are arranged along the transverse direction, and the distance between every two rows of needles is 2-10 cm.
The composite core body is prepared by a non-woven composite technology, has good liquid absorption performance, and can effectively avoid the phenomenon of lump formation and fault generation caused by particle sliding.
Compared with the prior art, the invention has the following advantages:
1. the core body mainly comprises an upper layer non-woven material, an SAP particle layer and a lower layer non-woven material, and a grid with a regular shape formed by arranging needle holes left by needle punching is arranged on the core body, so that the SAP particle storage and fixing effect is achieved, and the SAP particle sliding is effectively prevented. Because the use of hot melt adhesive is reduced in the process, the product is softer and more comfortable to use, and is also beneficial to environmental protection.
2. In addition, the fiber entanglement and interpenetration generated by needling are favorable for quick flow guide of liquid through wicking action, the liquid diffusivity of the core body is improved, and meanwhile, the strong force provided by the needling holes can ensure that the SAP particles which expand after absorbing water are not propped open, so that a certain consolidation effect is achieved, and the core body is effectively prevented from being layered and lumping.
3. The diversion trench processed by the ultrasonic bonding mode not only firmly combines the upper and lower layers of non-woven materials together, but also well plays a role in diversion and diffusion of liquid, and greatly improves the absorption effect of the liquid.
The invention has simple design concept and simple production process, and is beneficial to reducing the cost and improving the efficiency.
Drawings
FIG. 1 is a top view of a core made in accordance with the present invention;
FIG. 2 is a cross-sectional view of a core made in accordance with the present invention;
FIG. 3 is a flow chart of a method of preparation provided by the present invention;
FIG. 4 is a schematic view of the process equipment employed in the present invention;
FIG. 5 is a schematic view of needle arrangement of a needle loom with longitudinal needle arrangement;
FIG. 6 is a schematic diagram of needle arrangement of the needle loom with transverse needle arrangement.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The technological equipment adopted by the invention is shown in figures 3 and 4, and comprises a conveyor belt, and a core bottom layer carding machine 13 for finishing a core bottom layer coiled material 6, an SAP hopper 8 for paving SAP particles 9 on the core bottom layer 4, a core surface layer carding machine 14 for finishing a core surface layer coiled material 7, a first needle machine 10, a second needle machine 11 and an ultrasonic bonding device 12 are sequentially arranged along the conveying direction of the conveyor belt.
Example 1
A method for preparing a core with functions of guiding diffusion and preventing particle sliding (as shown in figure 3):
referring to FIGS. 2 and 3, the sheet density is 100g/m by needle punching2The needle-punched non-woven fabric coiled material 7 mixed by polyethylene fiber and viscose is used as the core surface layer 3, and then the surface density is 20g/m by adopting the spun-bonding technology2As a core substrate 4, a web 6 of a spunbond nonwoven fabric of polypropylene fibers.
On the automatic production line of the composite core, the core bottom layer coiled material 6 is uncoiled and is driven by the net conveying curtain to be uniformly scattered under the SAP hopper 8, the net conveying curtain is continuously conveyed, and the coiled material is uncoiled and covers the core bottom layer and the SAP particles 9 when passing below the core surface layer coiled material 7. And then feeding the three-layer structure into a first needling machine 10 with transverse needle arrangement and a distance of 2cm and a second needling machine 11 with longitudinal needle arrangement and a distance of 2cm to needle the composite needling lattice cage type three-dimensional structure so as to fix SAP particles in the three-layer structure, wherein the stepping amount of the two needling machines is 2cm, and finally, the core body is bonded by ultrasonic waves with quincunx patterns 12 to prepare a quincunx diversion trench and is reinforced into an absorption core body with the functions of diversion, diffusion and particle sliding prevention.
The core body manufactured as shown in fig. 1-2 comprises a core body surface layer 3 (i.e. an upper layer of non-woven material), an SAP particle layer 5 and a core body bottom layer 4 (i.e. a lower layer of non-woven material) which are sequentially compounded, wherein flow guide grooves 1 are distributed on the core body, and the bottoms of the flow guide grooves 1 extend to the SAP particle layer 5; the layer of SAP particles consists of SAP particles 9 laid and fixed by the needle-punched bundles 2.
Example 2
A method for preparing a core with functions of guiding diffusion and preventing particle sliding (as shown in figure 3):
made by carding to a surface density of 50g/m using a carding machine 132The polyethylene non-woven fiber net is used as a core bottom layer 4, is driven by a net conveying curtain to be uniformly dusted below an SAP hopper 8, and is covered with a fabric with the surface density of 60g/m and made by a carding machine 142The three-layer structure is sequentially fed into a first needle machine 10 with transverse needle arrangement and 6cm distance and a second needle machine 11 with longitudinal needle arrangement and 6cm distance to punch a composite punched lattice cage type three-dimensional structure to fix SAP particles in the three-layer structure, the stepping amount of the two needle machines is 6cm, and finally the core is bonded by ultrasonic waves with diamond patterns 12 to prepare a diamond-shaped diversion trench and is reinforced into an absorption core with the functions of diversion, diffusion and particle sliding prevention.
Claims (9)
1. The utility model provides a core with water conservancy diversion diffusion and prevent granule sliding action, top-down includes upper layer non-woven material, SAP granular layer, lower floor non-woven material in proper order, its characterized in that:
the upper layer of non-woven material is non-woven fabric made by any one of needling, spunlace and hot air technology or fiber web directly output by a carding machine or an air-laid machine; the upper layer of non-woven material is provided with a diversion trench;
the SAP particle layer is formed by laying water-absorbent resin particles;
the lower layer non-woven material is non-woven fabric made by any one of spun-bonding, hot air and spunlace technology or fiber web directly output by a carding machine or an air-laid machine;
the core body is formed by three layers of needling of an upper layer of non-woven material, an SAP particle layer and a lower layer of non-woven material, and fiber bundles formed by needling in the upper layer of non-woven material penetrate through the SAP particle layer and are entangled with the lower layer of non-woven material, and the fiber bundles are arranged in a rectangular shape along the length direction of the core body to form a lattice cage for fixing the SAP particles.
2. A core with the functions of guiding diffusion and preventing particle sliding as claimed in claim 1, wherein the upper layer non-woven material and the lower layer non-woven material are made of common chemical fibers and natural fibers by different non-woven technologies; the upper layer non-woven material is non-woven fabric made by needle punching, water jet, hot air technology or fiber web made by carding and air flow; the lower layer nonwoven is a nonwoven made by spunbond, hot air, hydroentangling techniques or a web made by carding and air-laying.
3. The core with the functions of guiding diffusion and preventing particle sliding as claimed in claim 2, wherein the fibers adopted by the upper layer of non-woven material are one of polypropylene and polyethylene and one of cotton and viscose, and the areal density of the core is 40-150 g/m2(ii) a The lower non-woven material adopts any one of polypropylene, polyethylene, viscose and cotton as fiber, and the surface density of the lower non-woven material is 10-60 g/m2。
4. The core with the functions of guiding the diffusion and preventing the particles from sliding as claimed in claim 1, wherein the SAP particle layer is a particle layer formed by stacking one or more water-absorbent resins with different shapes and different absorption capacities, and the particle diameter is 150-300 mesh.
5. A core having the functions of guiding the diffusion of particles and preventing the particles from slipping as claimed in claim 1, wherein said SAP particle layer is formed by uniformly spreading a hopper on the lower layer nonwoven material with water-absorbent resin particles present on the surface or inside thereof; the upper layer non-woven material and the lower layer non-woven material are consolidated together by a needle punching method; the diversion trench is made by hot rolling or point bonding or ultrasonic bonding.
6. The core for flow guiding and diffusion and particle sliding prevention according to claim 5, wherein the water-absorbent resin particles are held in the upper layer nonwoven material and the lower layer nonwoven material by a different needle arrangement pattern in which needle holes are arranged in a different shape of a lattice.
7. A core body with the functions of guiding diffusion and preventing particles from sliding according to claim 5, wherein the shape of the guiding grooves is polygonal, curved or petal-shaped.
8. The method for preparing the core with the functions of guiding diffusion and preventing particle sliding of any one of claims 1-7, is characterized by comprising the following steps:
step 1): preparation of the upper layer nonwoven material:
one of polypropylene and polyethylene and one of cotton and viscose are mixed, and the mixture is prepared into the fabric with the surface density of 40-150 g/m by needling, spunlace and hot air technology2The non-woven fabric is directly carded or air-laid to obtain the non-woven fabric with the surface density of 40-150 g/m2The web of (a);
step 2): preparation of the lower layer nonwoven:
the surface density of the material is 10-60 g/m by adopting any one of polypropylene, polyethylene, viscose and cotton and adopting the technologies of spun bonding, hot air and spunlace/85202Or directly using the non-woven fabricThe surface density of the obtained product is 10-60 g/m by means of carding or air-laid2The web of (a).
Step 3): compounding of SAP particle layers:
the method comprises the following steps of enabling a prepared lower-layer non-woven material coiled material or a fiber web made by carding and air-laid to reach the lower part of an SAP hopper under the driving of a net conveying curtain, uniformly spreading SAP particles, then laying the prepared upper-layer non-woven material coiled material or the fiber web made by carding and air-laid on the upper part of a core bottom layer, feeding the core into a needle machine for needling composition, enabling a punched lattice cage type three-dimensional structure to be just capable of fixing the SAP particles in the core, and finally forming a diversion trench on the core in a hot rolling, point bonding or ultrasonic bonding mode.
9. The method for preparing a core with the functions of guiding diffusion and preventing particle sliding according to claim 8, wherein the needle arrangement rule of the needle machine in the step 3) is as follows: the needles of the first needle machine are arranged along the longitudinal direction along the production direction, and the distance between every two rows of needles is 2-10 cm; the needles of the second needle machine are arranged along the transverse direction, and the distance between every two rows of needles is 2-10 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306202.4A CN111529214A (en) | 2020-04-17 | 2020-04-17 | Core with functions of guiding diffusion and preventing particles from sliding and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306202.4A CN111529214A (en) | 2020-04-17 | 2020-04-17 | Core with functions of guiding diffusion and preventing particles from sliding and preparation method |
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| Publication Number | Publication Date |
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| CN111529214A true CN111529214A (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010306202.4A Pending CN111529214A (en) | 2020-04-17 | 2020-04-17 | Core with functions of guiding diffusion and preventing particles from sliding and preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113230032A (en) * | 2021-04-26 | 2021-08-10 | 嘉兴学院 | Composite core and preparation method thereof |
| CN114099146A (en) * | 2021-11-20 | 2022-03-01 | 苏州谷原生物科技有限公司 | Preparation process of composite absorption core for paper diaper |
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| US4826498A (en) * | 1986-01-15 | 1989-05-02 | Koczab Jean P | Absorbent pad, particularly for articles of hygiene |
| CA2268344A1 (en) * | 1999-04-19 | 2000-10-19 | Texel Inc. | Three dimensional needled non-woven absorbent composites |
| WO2003073971A2 (en) * | 2002-03-01 | 2003-09-12 | Claudio Giacometti | Method for producing a composite absorbent structure for absorbent article, and structure formed in this way |
| CN102282302A (en) * | 2008-12-19 | 2011-12-14 | Iq泰克斯专利管理有限责任公司 | Super absorber polymer felt and method for the production thereof |
| CN202198739U (en) * | 2011-07-14 | 2012-04-25 | 王振宇 | Grooved composite blotting paper |
| GB2489947A (en) * | 2011-04-11 | 2012-10-17 | Adv Med Solutions Ltd | Wound dressing formed by needling two non-woven layers together |
| US20190037785A1 (en) * | 2016-02-03 | 2019-02-07 | Marco Johannes Cornelis Marie CLAESSENS | Layered product comprising superabsorbent polymer |
| CN110731863A (en) * | 2019-11-15 | 2020-01-31 | 深圳市棉芯科技有限公司 | glue-free needle-punched absorption core and sanitary product containing the same |
-
2020
- 2020-04-17 CN CN202010306202.4A patent/CN111529214A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4826498A (en) * | 1986-01-15 | 1989-05-02 | Koczab Jean P | Absorbent pad, particularly for articles of hygiene |
| CA2268344A1 (en) * | 1999-04-19 | 2000-10-19 | Texel Inc. | Three dimensional needled non-woven absorbent composites |
| WO2003073971A2 (en) * | 2002-03-01 | 2003-09-12 | Claudio Giacometti | Method for producing a composite absorbent structure for absorbent article, and structure formed in this way |
| CN102282302A (en) * | 2008-12-19 | 2011-12-14 | Iq泰克斯专利管理有限责任公司 | Super absorber polymer felt and method for the production thereof |
| GB2489947A (en) * | 2011-04-11 | 2012-10-17 | Adv Med Solutions Ltd | Wound dressing formed by needling two non-woven layers together |
| CN202198739U (en) * | 2011-07-14 | 2012-04-25 | 王振宇 | Grooved composite blotting paper |
| US20190037785A1 (en) * | 2016-02-03 | 2019-02-07 | Marco Johannes Cornelis Marie CLAESSENS | Layered product comprising superabsorbent polymer |
| CN110731863A (en) * | 2019-11-15 | 2020-01-31 | 深圳市棉芯科技有限公司 | glue-free needle-punched absorption core and sanitary product containing the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113230032A (en) * | 2021-04-26 | 2021-08-10 | 嘉兴学院 | Composite core and preparation method thereof |
| CN113230032B (en) * | 2021-04-26 | 2022-07-12 | 嘉兴学院 | Composite core and preparation method thereof |
| CN114099146A (en) * | 2021-11-20 | 2022-03-01 | 苏州谷原生物科技有限公司 | Preparation process of composite absorption core for paper diaper |
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