CN-117719181-B - Preparation method of dry paper diaper

CN117719181BCN 117719181 BCN117719181 BCN 117719181BCN-117719181-B

Abstract

The invention relates to the technical field of disposable sanitary products, in particular to a preparation method of a dry paper diaper, which comprises the following steps of ①, continuously conveying a water-repellent non-woven fabric and a PE (polyethylene) bottom film impermeable to liquid, ②, hot-pressing the middle position of the water-repellent non-woven fabric to form a plurality of lower grooves distributed at intervals on the surface of the water-repellent non-woven fabric, ③, gluing the upper surface of the PE bottom film to form a plurality of annular gluing areas on the surface of the PE bottom film, wherein the center of the gluing area is an un-gluing area, ④, compounding the PE bottom film obtained in step ③ on the lower surface of the water-repellent non-woven fabric, enabling the position of the lower grooves to be located in the un-gluing area, and when the hydrophilic surface layer is compounded with an absorber and the water-repellent bottom layer, enabling the lower surface layer between two side folding parts to be located above the lower grooves. The invention solves the problem of poor dry effect of the existing paper diaper products.

Inventors

You huashan
Sun Daofen
LIN XUEQIN
CAI XIAOYONG

Assignees

福建省金嘉华卫生用品有限公司

Dates

Publication Date: 20260505
Application Date: 20231215

Claims (6)

1. A preparation method of a dry paper diaper is characterized by comprising the steps of preparing a hydrophilic surface layer (1), preparing an absorber (2), preparing a water-repellent bottom layer (3), compounding the hydrophilic surface layer (1), the absorber (2) and the water-repellent bottom layer (3), and then slitting, wherein the preparation of the absorber (2) comprises the following steps: a. taking an amphiphilic non-woven fabric as an upper surface layer (m) and a lower surface layer (n) of a core body, and respectively carrying out continuous conveying to define the width directions of the upper surface layer (m) and the lower surface layer (n) as transverse directions; b. sizing the upper surface of the lower surface layer (n) and continuing to convey; c. Applying a liquid absorbing material on the upper surface of the lower surface layer (n), and bonding the liquid absorbing material with the glued lower surface layer (n), wherein the liquid absorbing material consists of fluff pulp and SAP (super absorbent polymer) and forms an independent fluff pulp layer (21) and an independent SAP layer (22) after being distributed; d. Turning up and folding the two lateral sides of the lower surface layer (n) with the absorbent material applied in the step c inwards to form a plurality of layers of folding parts (23) on the two sides of the continuously conveyed lower surface layer (n), wherein the fluff pulp layers (21) are adhered to the inner side surfaces of the folding parts (23), and the fluff pulp layers (21) and SAP layers (22) are distributed on the lower surface layer (n) between the folding parts (23) on the two sides; e. Sizing and continuing to convey the lower surface of the upper surface layer (m) and compounding the lower surface layer (n) with the upper surface layer (m); f. after compounding, cutting and forming to obtain a single absorber (2); the preparation of the water repellent bottom layer (3) comprises the following steps: ① . Taking a water-repellent non-woven fabric (31) and a PE (polyethylene) bottom film (32) which is impermeable to liquid for continuous conveying; ② . Hot-pressing the middle part of the water-repellent non-woven fabric (31) to form a plurality of lower grooves (311) on the surface of the water-repellent non-woven fabric at intervals; ③ . Sizing the upper surface of the PE bottom film (32), and forming a plurality of annular sizing areas (32 a) on the surface of the PE bottom film, wherein the center of each sizing area is an un-sized area (32 b); ④ . Compounding the PE base film (32) obtained in the step ③ on the lower surface of the water-repellent non-woven fabric (31), and enabling the position of the lower groove (311) to be located at the non-glued area (32 b); When the hydrophilic surface layer (1) is compounded with the absorber (2) and the water-repellent bottom layer (3), the lower surface layer (n) between the two side folding parts (23) is positioned above the lower groove (311).
2. The method for preparing a dry paper diaper according to claim 1, wherein in the step d, lattice-shaped diversion protrusions (5) are arranged on the upper surfaces of the fluff pulp layer (21) and the SAP layer (22).
3. The method for producing a dry paper diaper according to claim 1, wherein in the step e, the glue applying position of the upper surface layer (m) is located at both lateral sides thereof, and the composite position of the upper surface layer (m) and the lower surface layer (n) is located at the upper surface of the folded portion (23).
4. The method for preparing the dry paper diaper according to claim 1, wherein a diversion layer (4) is arranged between the hydrophilic surface layer (1) and the upper surface layer (m).
5. The method for preparing the dry paper diaper according to claim 1, wherein the hydrophilic surface layer (1) is provided with leak-proof isolation edges (11) which are symmetrically distributed, and the folding part (23) is positioned on the inner side of the leak-proof isolation edges (11).
6. The method for producing a dry paper diaper according to any one of claims 1 to 5, wherein in the step d, the thickness of the fluff pulp layer (21) on the lower surface layer (n) between the folded portions (23) on both sides is gradually decreased from the center to both sides.

Description

Preparation method of dry paper diaper Technical Field The invention relates to the technical field of disposable sanitary products, in particular to a preparation method of a dry paper diaper. Background In Wei Pin field, if the paper diaper product is to keep dry and comfortable in use, the rapid diversion and absorption during liquid absorption are particularly important, when the liquid absorption is too slow or the water shrinkage capability is reduced, the skin-sticking position is wet, sticky uncomfortable feeling is generated, and the phenomenon of 'red pp' of eczema is generated for a long time. The existing paper diaper product focusing on the characteristic of dryness, as shown in China patent application CN 213157017U, is a dry paper diaper, and comprises a leakage-proof fastening structure and a body, wherein the leakage-proof fastening structure is arranged on the body, the body comprises a dry layer, a core body and a bottom layer which are sequentially arranged, the dry layer comprises a breathable layer and a drainage layer, the drainage layer is connected onto the core body in a covering manner, the breathable layer is connected onto the drainage layer in a covering manner, and a plurality of through holes are distributed on the breathable layer. In the structure, urine is guided through the drainage layer, the drainage layer is equivalent to the traditional diversion layer structure, and a ventilation layer structure is arranged to increase ventilation, but referring to the content, the ventilation layer adopts oil-resistant water-repellent fabric, and ventilation through holes are formed in the ventilation layer, so that the rapid absorption of the urine is obviously influenced, the leakage caused by slow absorption rate is more easily caused when the liquid amount is large, and the use of the diaper is greatly influenced. Therefore, the main purpose of the application is to design a product which can reduce the long-time contact of skin and urine and has high absorption rate. Disclosure of Invention Therefore, the invention provides a preparation method of the dry paper diaper, which solves the problem that the existing paper diaper product is poor in dry effect. In order to achieve the above purpose, the invention is realized by the following technical scheme: the preparation method of the dry paper diaper comprises the steps of preparing a hydrophilic surface layer, preparing an absorber, preparing a water-repellent bottom layer, compounding the hydrophilic surface layer with the absorber and the water-repellent bottom layer, and then cutting, and is characterized in that the preparation of the absorber comprises the following steps: a. Taking amphiphilic non-woven fabrics as an upper surface layer and a lower surface layer of a core body, respectively carrying out continuous conveying, and defining the width directions of the upper surface layer and the lower surface layer as transverse directions; b. Sizing the upper surface of the lower surface layer and continuing to convey; c. Applying a liquid absorbing material on the upper surface of the lower surface layer to enable the liquid absorbing material to be adhered to the glued lower surface layer, wherein the liquid absorbing material consists of fluff pulp and SAP (super absorbent polymer) and forms an independent fluff pulp layer and an independent SAP layer after being laid; d. C, inwards turning and folding the two lateral sides of the lower surface layer, to which the water absorbing material is applied, so that multi-layer folding parts are formed on the two sides of the lower surface layer which are continuously conveyed, wherein a fluff pulp layer is adhered to the inner side surfaces of the folding parts, and the fluff pulp layer and an SAP layer are distributed on the lower surface layer between the folding parts on the two sides; e. Sizing and continuing to convey the lower surface of the upper surface layer, and compounding the lower surface layer with the lower surface layer; f. after compounding, cutting and forming to obtain a single absorber; The preparation of the water repellent bottom layer comprises the following steps: ① . Taking a water-repellent non-woven fabric and a PE (polyethylene) bottom film which is impermeable to liquid for continuous conveying; ② . Hot-pressing the middle part of the water-repellent non-woven fabric, forming a plurality of lower grooves on the surface of the base plate at intervals; ③ . Sizing the upper surface of the PE base film to form a plurality of annular sizing areas on the surface of the PE base film, wherein the center of each sizing area is an un-sized area; ④ . Compounding the PE basement membrane obtained in the step ③ on the lower surface of the water-repellent non-woven fabric, and enabling the position of the lower groove to be located at the non-glued area; When the hydrophilic surface layer is compounded with the absorber and the water-repellent bottom layer, the lo