CN110403768B - Method for preparing baby diaper with multiple side leakage prevention three-dimensional protective enclosures - Google Patents
Method for preparing baby diaper with multiple side leakage prevention three-dimensional protective enclosures Download PDFInfo
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- CN110403768B CN110403768B CN201910764953.8A CN201910764953A CN110403768B CN 110403768 B CN110403768 B CN 110403768B CN 201910764953 A CN201910764953 A CN 201910764953A CN 110403768 B CN110403768 B CN 110403768B
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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
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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
- A61F13/45—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 shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
- A61F13/49406—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region
- A61F13/49413—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region the edge leakage prevention means being an upstanding barrier
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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
- A61F13/45—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 shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
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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 relates to a method for preparing a disposable absorbent product with multiple side leakage prevention three-dimensional guards, which is characterized in that the preparation of the three-dimensional guard composite sheet comprises the following steps: firstly, glue spraying treatment is carried out on the non-woven fabric sheet at the corresponding position corresponding to the position connected with the water-repellent sheet; secondly, connecting the water-repellent sheet to the non-woven fabric sheet through an adhesive layer; thirdly, slitting the non-woven fabric sheet; spraying glue on the elastic rubber band, and gluing the elastic rubber band to connect the transverse side edge of the water-repellent sheet; fifthly, spraying glue on the water-repellent sheet; step six, forming a water repellent sheet as an intermediate layer by adopting a folding device, and forming a left three-dimensional enclosure composite sheet and a right three-dimensional enclosure composite sheet which have a three-layer composite structure; and step seven, respectively connecting the left three-dimensional enclosure composite sheet and the right three-dimensional enclosure composite sheet to the two transverse sides of the liquid-permeable top layer through adhesive layers, thereby forming the multiple side leakage-proof three-dimensional enclosures.
Description
Technical Field
The invention relates to the field of disposable absorbent articles, in particular to a method for preparing a baby diaper with multiple side leakage prevention three-dimensional guards.
Background
Generally, infant absorbent articles include baby diapers, pull-off pants, and the like, all constructed of multiple layers of materials, including inner surface materials, absorbent materials, and the like. Along with the improvement of living standard of people, the baby diaper has the advantages of convenient carrying and cleanness, so the baby diaper is more and more widely applied. Infant absorbent articles are more and more elegant, comfortable and practical, and the application of infant absorbent articles is convenient for people to nurture infants.
Traditional panty-shape diapers are because structural design's defect, and the wearing travelling comfort is comparatively, generally leads to the leak protection effect not good. Therefore, chinese patent No. 201520047036.5 discloses a panty-shape diapers of automatic expansion leak protection three-dimensional enclosure, wrap up the three-dimensional enclosure that is used for the leak protection that the both sides of panty-shape diapers body and body set up, still be provided with the elastic strip on three-dimensional enclosure, the elastic strip sets up the downside at the elastic edge of three-dimensional enclosure, its both ends set up on the body and fix the inboard at the elastic edge, this panty-shape diapers are through setting up three-dimensional enclosure in body both sides, make the lateral leakage prevention effect of panty-shape diapers obtain promoting, nevertheless can't solve the problem of leaking the back before the solution, and holistic third dimension is not strong.
The prior art with the publication number of CN101862239B discloses a paper diaper with a front-back leakage-proof three-dimensional enclosure, which has good leakage-proof effect, and comprises a hydrophilic surface layer and a waterproof bottom layer, wherein a water-absorbing cotton core layer is arranged between the hydrophilic surface layer and the waterproof bottom layer, the hydrophilic surface layer and the waterproof bottom layer are bonded together outside the two longitudinal ends of the water-absorbing cotton core layer, the two sides of the paper diaper are respectively provided with the three-dimensional enclosure for preventing side leakage, a rubber band capable of longitudinally shrinking is arranged in the three-dimensional enclosure, the two longitudinal ends of the three-dimensional enclosure are bonded with the hydrophilic surface layer, and the bonding positions are outside the two longitudinal ends of the water-absorbing cotton core layer. In the preferred embodiment, the contracted length of the rubber band in the three-dimensional enclosure of the paper diaper is greater than the longitudinal length of the absorbent cotton core layer. When the paper diaper is used, the rubber band is stretched to lift the waterproof bottom layer to form a certain height, so that the front end and the rear end of the paper diaper generate good leakage-proof effects. In addition, the water absorption layer additionally arranged at the longitudinal end of the water absorption cotton core layer can make the leakage-proof effect more obvious, and the elastic waistline is stuck on the back surface of the waterproof bottom layer to make the wearing more comfortable and close-fitting.
However, in the existing side leakage prevention absorbent product, the three-dimensional enclosure is basically made of a single layer of water-repellent material wrapped by elastic rubber bands. Accordingly, the present invention provides a three-dimensional enclosure having superior hydrostatic pressure resistance and water repellency, and a disposable absorbent article having superior leakage resistance, superior flexibility, and superior wearing comfort is obtained therefrom.
Disclosure of Invention
The invention aims to provide a multi-side leakage-proof three-dimensional guard and a preparation method of a disposable absorbent product with the multi-side leakage-proof three-dimensional guard.
In order to achieve the above object, the invention adopts the following technical scheme: the method for preparing the disposable absorbent product of the multi-side leakage prevention three-dimensional enclosure comprises the steps of forming a three-dimensional enclosure composite sheet, forming an absorbent core and forming a liquid-tight bottom layer, and compositely connecting the three-dimensional enclosure composite sheet, the absorbent core and the liquid-tight bottom layer into a whole, cutting redundant materials through arcs to form leg enclosures, and then cutting the leg enclosures into pieces to obtain the disposable absorbent product, wherein the preparation of the three-dimensional enclosure composite sheet comprises the following steps:
respectively carrying out glue spraying treatment on the non-woven fabric sheet at corresponding positions corresponding to the water-repellent sheet;
secondly, connecting a water-repellent sheet to the non-woven fabric sheet through an adhesive layer, wherein the ratio of the transverse width of the water-repellent sheet to the transverse width of the non-woven fabric sheet is less than or equal to 50%, so that the non-woven fabric sheet is partially compounded into a non-woven fabric composite sheet with a double-layer structure, and the rest part is a non-woven fabric single-layer sheet;
thirdly, slitting the non-woven fabric sheet along the axial center line of the non-woven fabric sheet by adopting a die cutting device provided with a die cutter, so that the non-woven fabric sheet is a left non-woven fabric sheet and a right non-woven fabric sheet;
spraying glue on the elastic rubber band in a stretching state, and respectively gluing and connecting the left non-woven fabric sheet and the right non-woven fabric sheet at the positions close to the transverse side edges of the water-repellent sheet and the non-woven fabric single-layer sheet;
step five, respectively carrying out glue spraying treatment on the water-repellent sheets on the left non-woven fabric sheet and the right non-woven fabric sheet;
step six, adopting a folding device, respectively folding the non-woven single-layer sheets in the left non-woven fabric sheet and the right non-woven fabric sheet in the step five along the outer side of the elastic rubber band in a transverse direction, coating the elastic rubber band, embedding the elastic rubber band between the two non-woven fabric sheets, then continuously and compositely connecting the water-repellent sheets through the non-woven single-layer sheets in a transverse direction, and respectively forming the water-repellent sheets as intermediate layers, namely a left three-dimensional enclosure composite sheet and a right three-dimensional enclosure composite sheet with three-layer composite structures;
and step seven, respectively connecting the left three-dimensional enclosure composite sheet and the right three-dimensional enclosure composite sheet to the two transverse sides of the liquid-permeable top layer through adhesive layers, thereby forming the multiple side leakage-proof three-dimensional enclosures.
Preferably, the steps (a) and (b) include the following processes:
firstly, flattening a non-woven fabric sheet by a guide roller, and respectively spraying glue along two longitudinal side edges of the non-woven fabric sheet;
and secondly, cutting the water-repellent sheet into a left water-repellent sheet and a right water-repellent sheet along the axial center line by using a die cutting device, and then respectively joining the left water-repellent sheet and the right water-repellent sheet to the two longitudinal side edges of the non-woven fabric sheet by using a separating device and a feeding device.
Preferably, the steps (a) and (b) include the following processes:
firstly, flattening a non-woven fabric sheet by a guide roller, and spraying glue along the axial center line of the non-woven fabric sheet, wherein the transverse width of a glue spraying area corresponds to the transverse width of the water repellent sheet;
next, a water-repellent sheet is attached to the center position of the nonwoven fabric sheet.
Preferably, the step (vi) further comprises: through the separating device and the multi-roller guide device, the side edges of the left three-dimensional enclosure composite sheet and the right three-dimensional enclosure composite sheet, which are coated with the elastic rubber bands, are positioned at the inner side positions of the disposable absorbent product body in the transverse direction.
Preferably, the left three-dimensional enclosure composite sheet and the right three-dimensional enclosure composite sheet are both a base part for connecting a liquid-permeable top layer or/and a liquid-impermeable bottom layer, a free part connected to the base part and located at the upper end of the base part, and a stretchable part connected to the free part and located at the upper end of the free part, and the elastic rubber band is arranged in the stretchable part, so that each three-dimensional enclosure composite sheet has elastic stretchability in the longitudinal direction.
Preferably, the water-repellent layer is a PE cast film layer, and the square gram weight of the PE cast film layer is 6-16 g.
Preferably, the water-repellent layer is a PE air-permeable film layer with a square gram weight of 6-16g and an air permeability of 2500-2·24h。
Preferably, in the step of forming the liquid-impermeable back sheet, the following processes are further included:
the front waist is jointed with the liquid-tight bottom layer, and the leg-surrounding rubber bands are compounded in the liquid-tight bottom layer; joining the left and right waist tape to the side edges of the liquid-impermeable back sheet; and a step of combining the elastic waist band to the inner side in the transverse direction of the left and right waist patches.
Preferably, an absorbent core is laid on the upper side of the liquid-impermeable back sheet, the left three-dimensional containment composite sheet and the right three-dimensional containment composite sheet are respectively and compositely connected to the two lateral sides of the liquid-permeable top sheet to form a left three-dimensional containment and a right three-dimensional containment, and the liquid-permeable top sheet having the left three-dimensional containment and the right three-dimensional containment composite is compositely combined on the upper surface of the absorbent core along the longitudinal direction of the disposable absorbent article body.
Preferably, the continuous material compounded by each layer passes through a pair of flattening guide rollers in the conveying process, so that the continuous material is unfolded and flattened along the transverse direction, then the waist tape is cut, redundant material is cut in an arc shape to form leg circumference, and then the finished product single piece is cut to obtain the disposable absorbent product.
As a preferred technical solution, the spunbond meltblown nonwoven fabric is an SMS spunbond meltblown nonwoven fabric or an SMMS spunbond meltblown nonwoven fabric, and the square gram weight thereof is 6-16g, wherein the mass percentage of the meltblown layer (i.e. M layer or MM layer) is 10% -25%, preferably 12% -20%.
As a preferable technical scheme, the outer layer can also be selected from hot-rolled non-woven fabric or hot-air non-woven fabric.
The invention has the following beneficial effects:
firstly, on the basis of the existing three-dimensional enclosure, the three-dimensional enclosure with a three-layer structure is formed by taking a PE cast film or a PE breathable film as a water repellent layer positioned in the middle position, so that the leakage resistance and the side leakage resistance of the three-dimensional enclosure body are greatly improved, the softness and the comfort are improved, and the problems of large material thickness and reduced flexibility caused by the improvement of the hydrostatic pressure resistance of the existing three-dimensional enclosure are solved.
Drawings
FIG. 1 is a schematic view of a disposable absorbent article having multiple containment flaps.
FIG. 2 is a schematic structural view of the embodiment 1 and the embodiment 2 taken along the section A-A of FIG. 1.
Fig. 3 is a schematic three-layer structure of the three-dimensional enclosure of embodiments 1 and 2.
Fig. 4 is a schematic flow chart of the three-dimensional containment composite sheet of example 3.
Fig. 5 is a schematic flow diagram of the three-dimensional containment composite sheet of example 4.
Detailed Description
For the explanation of the stereo enclosure, it is also called as the leakproof isolation edge.
The guide roller, the die cutting device, the folding device, the separating device and the multi-roller steering device are common equipment or devices in the technical field, and a person skilled in the art can be familiar with selection and use.
For a further understanding of the present invention, reference will now be made in detail to the accompanying drawings.
Example 1
As shown in fig. 1, 2 and 3, the baby diaper 1 of the present embodiment includes a liquid-permeable top layer 3, a liquid-permeable flow guiding layer 4, a liquid-impermeable bottom layer 10, and an absorbent core 5 disposed between the liquid-permeable top layer 3 and the liquid-impermeable bottom layer 10, wherein three-dimensional enclosures are respectively disposed on two lateral sides of the absorbent core 5, the three-dimensional enclosures include a left three-dimensional enclosure 22 and a right three-dimensional enclosure 21, each of the three-dimensional enclosures includes a base portion, a free portion connected to the base portion and located at an upper end of the base portion, and an extensible portion connected to the free portion and located at an upper end of the free portion, and an elastic rubber band 23 is disposed in the extensible portion, so that the left three-dimensional enclosure 22 and the right three-dimensional enclosure 21 respectively have elastic extensibility in a longitudinal direction, and the layers are bonded by a hot melt adhesive layer. The liquid impermeable backsheet 10 is often composed of a nonwoven layer 14 and a breathable film 13. In addition, the baby diaper 1 further comprises a closing system for putting the baby diaper 1 on a user, the closing system is composed of a waist patch 9 positioned on the back of the baby diaper 1 and a front waist patch 7 positioned on the abdomen, and a dynamic adjustment elastic material 8 for adjusting the tightness of the closing system.
As shown in fig. 2 and fig. 3, the baby diaper 1 of the present embodiment is structurally characterized in that the left three-dimensional enclosure 22 and the right three-dimensional enclosure 21 disposed on both lateral sides of the baby diaper 1 are multiple side-leakage-proof three-dimensional enclosures, and the multiple side-leakage-proof three-dimensional enclosures are implemented by the following embodiments:
1) an SMS spunbonded nonwoven fabric or an SMMS spunbonded nonwoven fabric with the square gram weight of 6-8g is bent inwards to form a spunbonded nonwoven fabric inner layer and a spunbonded nonwoven fabric outer layer, wherein the mass percentage of a melt-blown layer (namely an M layer or an MM layer) is 16%. For example, the left three-dimensional enclosure 22 uses the outer layer 22c of the spunbonded/meltblown nonwoven fabric as a hydrophobic layer, and the outer layer 22c of the spunbonded/meltblown nonwoven fabric as a skin-friendly layer, which are formed by integrally connecting and bending the spunbonded/meltblown nonwoven fabric.
2) Selecting a PE casting film with the square gram weight of 8g as a water repellent layer 11, extending the longitudinal two ends of the PE casting film along the length direction of the three-dimensional enclosure until the longitudinal two ends are 40-50mm away from the end part of the three-dimensional enclosure respectively so as to improve the air permeability of the front end and the rear end of the three-dimensional enclosure, wherein one side edge of the PE casting film is close to the telescopic part, and the other side edge of the PE casting film extends out of a connecting part 15 connecting the three-dimensional enclosure with a liquid-tight bottom layer, and is respectively connected with a spun-bonded melt-blown non-woven fabric inner layer and a spun-bonded melt-blown non-woven fabric outer layer in a composite mode through a hot melt adhesive layer to form a three-dimensional enclosure body material with a three-layer structure.
3) For the left three-dimensional apron 22, the side edge of the spunbonded melt-blown nonwoven fabric outer layer 22c extends outwards until the side edge is flush with the side edge of the liquid-tight bottom layer 10, and the side edge of the composite layer formed by connecting the spunbonded melt-blown nonwoven fabric inner layer 22d and the PE cast film (water-repellent layer 11) extends out of the connecting part 15.
For the right three-dimensional apron 21, the side edge of the outer layer 21c of the spun-bonded melt-blown non-woven fabric extends outwards until the side edge is flush with the side edge of the liquid-tight bottom layer 10, and the side edge of a composite layer formed by connecting the inner layer 21d of the spun-bonded melt-blown non-woven fabric and the PE cast film (water-repellent layer 11) extends out of the connecting part 15.
4) The bases of the left three-dimensional enclosure 22 and the right three-dimensional enclosure 21 and the liquid-impermeable bottom sheet 10 are respectively fixed by gluing outside the connecting portion 15, so that the left three-dimensional enclosure 22 and the right three-dimensional enclosure 21 are respectively positioned at the two lateral sides of the absorbent core 5.
Through detection, the antistatic pressure value of the multiple side leakage prevention three-dimensional enclosure of the embodiment is 53mbar, and the softness is 10.4 mN. The three-dimensional guard is also suitable for disposable absorbent products such as baby pull-ups, adult diapers, sanitary towels and the like.
This embodiment is as the water repellent layer with PE curtain coating membrane, PE curtain coating membrane not only the hydrostatic pressure performance is owing to the non-woven fabrics by a wide margin, its compliance also is superior to the non-woven fabrics by a wide margin in addition, thereby can reduce the hydrophobic layer, the square grammes per square metre of outer spunbonded non-woven fabrics, with the compliance that improves three-dimensional enclosure, consequently, PE curtain coating membrane improves the anti-leakage of three-dimensional enclosure body by a wide margin, the edge leakage performance, and improve soft travelling comfort, consequently, it is big to have solved current three-dimensional enclosure and lead to material thickness for improving its hydrostatic pressure performance, the problem that the compliance reduces.
Example 2
The difference between this example and example 1 is that in this example, a PE breathable film layer is selected as the water-repellent layer, the square gram weight is 8g, and the breathable amount is 8gIs 3600g/cm2·24h。
As shown in fig. 2 and 3, the multiple side leakage prevention three-dimensional barriers (the left three-dimensional barrier 22 and the right three-dimensional barrier 21) of the present embodiment are implemented by the following embodiments:
1) the method comprises the following steps of inwards bending an SMS (short message service) spunbonded nonwoven fabric or an SMMS (simple Messaging System) spunbonded nonwoven fabric with the square gram weight of 8g, wherein the mass percent of a melt-blown layer (namely an M layer or an MM layer) is 16%, forming a melt-blown nonwoven fabric inner layer and a melt-blown spunbonded nonwoven fabric outer layer, wherein the melt-blown nonwoven fabric inner layer is used as a hydrophobic layer, the melt-blown nonwoven fabric outer layer is used as a skin-friendly layer, and the melt-blown nonwoven fabric inner layer and the melt-blown nonwoven fabric outer layer are formed by integrally connecting and bending the melt-blown spunbond nonwoven fabric.
2) The longitudinal two ends of the PE breathable film extend along the length direction of the three-dimensional enclosure until the two ends are parallel and level to the end part of the three-dimensional enclosure, one side edge of the PE breathable film is close to the telescopic part, the other side edge of the PE breathable film extends out of the connecting part 15 which connects the three-dimensional enclosure with the liquid-tight bottom layer, and the PE breathable film is respectively in composite connection with the inner layer of the spun-bonded melt-blown non-woven fabric and the outer layer of the spun-bonded melt-blown non-woven fabric through a hot melt adhesive layer to form a three-dimensional enclosure body material with a three-layer structure.
3) The side edges of the outer layers of the spunbonded melt-blown non-woven fabrics of the left three-dimensional guard 22 and the right three-dimensional guard 21 extend outwards until being flush with the side edge of the liquid-tight bottom layer, and meanwhile, the side edge of a composite layer formed by connecting the inner layer of the spunbonded melt-blown non-woven fabric and a PE cast film extends out of the connecting part 15.
4) The bases of the left three-dimensional enclosure 22 and the right three-dimensional enclosure 21 and the liquid-impermeable bottom sheet 10 are respectively fixed by gluing outside the connecting portion 15, so that the left three-dimensional enclosure 22 and the right three-dimensional enclosure 21 are respectively positioned at the two lateral sides of the absorbent core 5.
The detection proves that the softness of the multiple side leakage-proof three-dimensional enclosure of the embodiment is 11.0mN at 58 mbar.
Example 3
This example provides a method for making a multi-containment disposable absorbent article, wherein the absorbent core, the liquid impermeable backsheet, the closure system (left and right waist tape, front waist tape, elastic waist band) and the method for compositely attaching the structural layers are all made according to the prior art methods and procedures, and the method for making the same is well known to those skilled in the art, such as: those skilled in the art know that in the process of forming the liquid-impermeable back sheet, the front waist tape is joined to the liquid-impermeable back sheet and the leg-surrounding elastic bands are combined in the liquid-impermeable back sheet, and at the same time, the left and right waist tapes are joined to the side edges of the liquid-impermeable back sheet and the elastic waist band is combined to the laterally inner side positions of the left and right waist tapes. For another example: and (3) enabling the continuous material with the structural layers in composite connection to pass through a pair of flattening guide rollers in the transmission process, unfolding and flattening the continuous material along the transverse direction, then cutting the waist tape and cutting redundant material in an arc shape to form leg enclosure treatment, and then cutting off the finished single sheet to obtain the disposable absorbent product.
The embodiment is characterized in that in the process of preparing the disposable absorbent article with the multiple side leakage prevention three-dimensional enclosure, a step of forming a three-dimensional enclosure composite sheet is further realized, and then the multiple side leakage prevention three-dimensional enclosure is realized, wherein the three-dimensional enclosure composite sheet consists of a left non-woven fabric sheet and a right non-woven fabric sheet, in the forming process of the disposable absorbent article, an absorption core is laid above a liquid-impermeable bottom layer, then the left non-woven fabric sheet and the right non-woven fabric sheet are respectively and compositely connected with the two transverse sides of a liquid-permeable surface layer sheet to form a left three-dimensional enclosure and a right three-dimensional enclosure, then the liquid-permeable surface layer sheet composited with the left three-dimensional enclosure and the right three-dimensional enclosure is composited on the upper surface of the absorption core along the longitudinal direction of the disposable absorbent article body, so that the three-dimensional enclosure composite sheet, the absorption core and the liquid-impermeable bottom layer are compositely connected into a whole, and cutting the leg band into pieces to obtain the disposable absorbent product.
As shown in fig. 4, the three-dimensional enclosure composite sheet of the embodiment is implemented by the following processes:
step one, after the non-woven fabric sheet 101 is flattened by a guide roller, glue spraying is respectively carried out along two longitudinal side edges of the non-woven fabric sheet 101 (such as an SMS non-woven fabric, an SMMS non-woven fabric, a hot-rolled non-woven fabric or a spun-bonded non-woven fabric), wherein the glue shape can adopt multi-line glue scraping, spiral glue spraying, omega-shaped glue spraying, S-shaped glue spraying, strip glue spraying or CS-shaped glue spraying.
And step two, cutting 201 the water-repellent sheet by using a die cutting device, wherein the water-repellent sheet (such as a PE casting film or a PE breathable film) is cut into a left water-repellent sheet 102 and a right water-repellent sheet 103 along the axial center line by the cutting 201. Then, a left water-repellent sheet 102 and a right water-repellent sheet 103 are respectively joined to both longitudinal sides of the nonwoven fabric sheet by a separating device and a feeding device, so that the nonwoven fabric sheet is partially compounded into a nonwoven fabric composite sheet 106 having a double-layer structure, and the remaining part is a nonwoven fabric single-layer sheet 107. Wherein:
the ratio of the transverse width of the water-repellent sheet to the transverse width of the nonwoven sheet is less than or equal to 50%, such as 50%, 45%, 40%, 35%, etc., preferably 40% or 45%.
Thirdly, slitting 202 is conducted on the non-woven fabric by using a die cutting device provided with a die cutting knife, and slitting 202 processing is conducted along the axial center line of the non-woven fabric sheet, so that the non-woven fabric sheet is a left non-woven fabric sheet 101A and a right non-woven fabric sheet 101B.
And fourthly, spraying glue on the elastic rubber band 104 (such as spandex filaments and flat rubber roots) in a stretching state, and gluing and connecting the left non-woven fabric sheet 101A and the right non-woven fabric sheet 101B with the non-woven fabric single-layer sheet at the positions close to the side edge of the water-repellent sheet 102 and the side edge of the water-repellent sheet 103 respectively.
In this step, the elastic band 104 may be composed of two or more spandex filaments arranged at intervals along the transverse width direction of the nonwoven single-layer sheet.
In this step, the distance between the water repellent sheet and the adjacent spandex filament (i.e., the spandex filament that is the smallest in pitch from the side edge of the water repellent sheet) is preferably 3 to 15mm, preferably 5 to 10 mm.
And step five, respectively carrying out glue spraying treatment on the water- repellent sheets 102 and 103 on the left non-woven fabric sheet 101A and the right non-woven fabric sheet 101B.
Step six, folding and compounding 203: and (3) respectively transversely folding the non-woven single-layer sheets in the left non-woven fabric sheet and the right non-woven fabric sheet obtained in the step (five) along the outer side of the elastic rubber band far away from the water-repellent sheet by using a folding device, coating the elastic rubber band at the position of the elastic rubber band, embedding the elastic rubber band between the two non-woven fabric sheets, then continuously and transversely compositely connecting the water-repellent sheets through the non-woven fabric single-layer sheets, and respectively forming a left three-dimensional enclosure composite sheet 108 and a right three-dimensional enclosure composite sheet 109 which are of a three-layer composite structure and take the water-repellent sheets as intermediate layers.
The left three-dimensional enclosure composite sheet 108 and the right three-dimensional enclosure composite sheet 109 are respectively a base part for connecting a liquid-permeable top layer or/and a liquid-impermeable bottom layer, a free part connected to the base part and located at the upper end of the base part, and an expansion part connected to the free part and located at the upper end of the free part, wherein the elastic rubber band is arranged in the expansion part, so that each three-dimensional enclosure composite sheet has elastic expansion in the longitudinal direction.
And step seven, respectively connecting the left three-dimensional enclosure composite sheet 108 and the right three-dimensional enclosure composite sheet 109 to the two transverse sides of the liquid-permeable top layer through adhesive layers to form a left three-dimensional enclosure and a right three-dimensional enclosure, thereby forming the multiple side leakage-proof three-dimensional enclosures.
Preferably, the water-repellent layer is a PE cast film layer with a square gram weight of 6-16 g.
Example 4
As shown in fig. 5, this embodiment provides another implementation process of the three-dimensional enclosure composite sheet:
firstly, flattening a non-woven fabric sheet 301 through a guide roller, spraying glue along the axial center line of the non-woven fabric sheet 301, wherein the transverse width of a glue spraying area corresponds to the transverse width of a water repellent sheet 302 (such as a PE cast film or a PE breathable film).
And step two, connecting the water-repellent sheet 302 to the center of the non-woven fabric sheet 301, wherein the water-repellent sheet 302 is compositely connected with the non-woven fabric sheet 301 through a hot melt adhesive layer.
Thirdly, slitting 401 the non-woven fabric by using a die cutting device provided with a die cutting knife, and slitting 401 along the axial center line of the non-woven fabric sheet 301, so that the non-woven fabric sheet is a left non-woven fabric sheet 301A and a right non-woven fabric sheet 301B, and meanwhile, the water-repellent sheet 302 is also slit into a water-repellent sheet 302A and a water-repellent sheet 302B.
And step four, spraying glue on the elastic rubber band 303 (such as spandex filaments and flat rubber roots) in a stretching state, and gluing and connecting the left non-woven fabric sheet 301A and the right non-woven fabric sheet 301B with the non-woven fabric single-layer sheet at the positions close to the side edge of the water-repellent sheet 302A and the side edge of the water-repellent sheet 302B respectively.
And step five, respectively carrying out glue spraying treatment on the water- repellent sheets 302A and 302B on the left non-woven fabric sheet 301A and the right non-woven fabric sheet 301B.
Step six, folding and compounding 402: and (3) respectively transversely folding the non-woven single-layer sheets in the left non-woven fabric sheet and the right non-woven fabric sheet obtained in the step (five) along the outer side of the elastic rubber band far away from the water-repellent sheet by using a folding device, coating the elastic rubber band at the position of the elastic rubber band, embedding the elastic rubber band between the two non-woven fabric sheets, then continuously and transversely connecting the water-repellent sheets through the non-woven fabric single-layer sheets in a composite manner, and respectively forming a left three-dimensional enclosure composite sheet 304 and a right three-dimensional enclosure composite sheet 305 which take the water-repellent sheets as intermediate layers and have a three-layer composite structure.
The step (six) further comprises: through the separating device and the multi-roller steering device, the side edges of the left three-dimensional enclosure composite sheet 304 and the right three-dimensional enclosure composite sheet 305 coated with the elastic rubber band are respectively positioned at the inner side positions of the disposable absorbent product body in the transverse direction.
And step seven, respectively connecting the left three-dimensional enclosure composite sheet 304 and the right three-dimensional enclosure composite sheet 305 to the two transverse sides of the liquid-permeable top layer through adhesive layers to form a left three-dimensional enclosure and a right three-dimensional enclosure, thereby forming the multiple side leakage-proof three-dimensional enclosures.
Preferably, the water-repellent layer is a PE air-permeable film layer with a square gram weight of 6-16g and an air permeability of 2500-2·24h。
Performance testing
1. Antistatic water pressure: the test was carried out according to GB/T24218.16-2017 (textile nonwoven test method part 16: determination of water repellency (hydrostatic pressure)).
2. Softness: the assay was performed with reference to the detection method of EDANA WSP 90.3. (05).
3. Comparison sample: SMS nonwoven fabric with a square gram weight of 24g, commercially available.
The test results are shown in the following table:
| item | Example 1 | Example 2 | Control sample |
| Hydrostatic pressure (mbar) | 53 | 58 | 24 |
| Softness (mN) | 10.4 | 11.0 | 15.3 |
The smaller the softness value, the better the softness.
Although the present invention has been described with reference to specific embodiments, the scope of the present invention is not limited to the above-described embodiments, and various modifications, changes, and substitutions may be made without departing from the spirit of the present invention.
Claims (1)
1. The utility model provides a method for preparing the baby diaper of multiple side leakage prevention three-dimensional enclosure, baby diaper includes liquid permeability top layer, liquid permeability water conservancy diversion layer and liquid-tight nature bottom, and sets up the absorption core between liquid permeability top layer and the liquid-tight nature bottom left three-dimensional enclosure, right three-dimensional enclosure are provided with respectively to the horizontal both sides of absorption core, each three-dimensional enclosure all includes the basal portion, is connected to this basal portion and is located the free portion of basal portion upper end to and be connected to this free portion and be located the pars contractilis of free portion upper end be equipped with the elasticity rubber band in the pars contractilis for left three-dimensional enclosure, right three-dimensional enclosure have elasticity respectively in longitudinal direction, connect through the hot melt adhesive layer veneer between each layer, its characterized in that: the left three-dimensional enclosure and the right three-dimensional enclosure are both multiple side leakage-proof three-dimensional enclosures, and are realized through the following implementation modes:
1) an SMS spunbonded non-woven fabric or SMMS spunbonded non-woven fabric with the square gram weight of 8g is bent inwards to form a spunbonded melt-blown non-woven fabric inner layer and a spunbonded melt-blown non-woven fabric outer layer, wherein the spunbonded melt-blown non-woven fabric inner layer serves as a hydrophobic layer, the spunbonded melt-blown non-woven fabric outer layer serves as a skin-friendly layer, and the spunbonded melt-blown non-woven fabric inner layer and the spunbonded melt-blown non-woven fabric outer layer are integrally connected and bent;
2) extending the longitudinal two ends of the PE breathable film along the length direction of the three-dimensional enclosure until the two ends are respectively flush with the end parts of the three-dimensional enclosure, wherein one side edge of the PE breathable film is close to the telescopic part, and the other side edge of the PE breathable film extends out of a connecting part for connecting the three-dimensional enclosure with the liquid-tight bottom layer, and is respectively connected with the inner layer of the spun-bonded melt-blown non-woven fabric and the outer layer of the spun-bonded melt-blown non-woven fabric in a composite manner through hot melt adhesive layers to form a three-dimensional enclosure body material with a three-layer structure;
3) respectively extending the side edges of the outer layers of the spunbonded melt-blown non-woven fabrics of the left three-dimensional enclosure and the right three-dimensional enclosure outwards until the side edges are flush with the side edge of the liquid-tight bottom layer, and simultaneously extending the side edge of a composite layer formed by connecting the inner layer of the spunbonded melt-blown non-woven fabric and the PE breathable film to the outside of the connecting part;
4) the base parts of the left three-dimensional enclosure and the right three-dimensional enclosure and the liquid-tight bottom layer are glued and fixed outside the connecting parts respectively, so that the left three-dimensional enclosure and the right three-dimensional enclosure are respectively positioned at the two transverse sides of the absorption core;
the PE breathable film layer is a water repellent layer, the square gram weight of the PE breathable film layer is 8g, and the air permeability is 3600g/cm224 h; the hydrostatic pressure value of the left three-dimensional enclosure and the right three-dimensional enclosure is 58mbar, and the softness is 11.0 mN.
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| CN112057236A (en) * | 2020-08-31 | 2020-12-11 | 广州市汉氏卫生用品有限公司 | Diaper side leakage preventing structure capable of preventing external friction and manufacturing method thereof |
| CN112057235A (en) * | 2020-08-31 | 2020-12-11 | 广州市汉氏卫生用品有限公司 | Diaper lateral leakage prevention structure and manufacturing method thereof |
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| CN107361924A (en) * | 2017-08-08 | 2017-11-21 | 百润(中国)有限公司 | A kind of suitable body leakproof absorbent article and preparation method thereof |
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| US4795454A (en) * | 1986-10-10 | 1989-01-03 | The Procter & Gamble Company | Absorbent article having leakage-resistant dual cuffs |
| US4795454C1 (en) * | 1986-10-10 | 2001-06-26 | Procter & Gamble | Absorbent article having leakage resistant dual cuffs |
| US5087255A (en) * | 1988-12-21 | 1992-02-11 | The Procter & Gamble Company | Absorbent article having inflected barrier cuffs |
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