CN111973346A - Pressure-reducing waistline of paper diaper and manufacturing process thereof - Google Patents
Pressure-reducing waistline of paper diaper and manufacturing process thereof Download PDFInfo
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- CN111973346A CN111973346A CN202010917903.1A CN202010917903A CN111973346A CN 111973346 A CN111973346 A CN 111973346A CN 202010917903 A CN202010917903 A CN 202010917903A CN 111973346 A CN111973346 A CN 111973346A
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- melt adhesive
- pressure
- hot melt
- woven fabric
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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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- 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
- A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
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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
- A61F13/56—Supporting or fastening means
- A61F13/5622—Supporting or fastening means specially adapted for diapers or the like
- A61F13/565—Supporting or fastening means specially adapted for diapers or the like pants type diaper
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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
- A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing
- A61F2013/15861—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding
- A61F2013/15878—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding by thermal bonding
- A61F2013/15886—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding by thermal bonding by spot bonding
Abstract
The invention relates to a decompression waistline of a paper diaper and a manufacturing process thereof, wherein the decompression waistline comprises an elastic hot-melt adhesive layer, the elastic hot-melt adhesive layer is of a long strip structure, a first non-woven fabric layer and a second non-woven fabric layer are respectively arranged on the front side and the back side of the elastic hot-melt adhesive layer, and the first non-woven fabric layer, the elastic hot-melt adhesive layer and the second non-woven fabric layer are sequentially and tightly attached in a surface-to-surface contact mode.
Description
Technical Field
The invention belongs to the technical field of paper diapers, and particularly relates to a pressure-reducing waistline of a paper diaper and a manufacturing process thereof.
Background
The waistline part of the prior paper diaper generally adopts a fixing form of spandex filaments so as to realize the fixation of different waistlines, but the elastic band fixing mode can ensure that a gap exists between the spandex filaments and the outer layer of the paper diaper, a large amount of glue needs to be sprayed for improving the combination degree, otherwise, the gap can generate a large amount of wrinkles along with the contraction of the elastic bands, the wrinkles are pressed with the skin of a user when the spandex filaments contract, the wrinkle-shaped indentation can be formed for a long time in the past to cause the skin of the user to generate red swelling, and pruritus can be caused by sultriness, so that discomfort is brought to the user.
Therefore, a novel processing technology is needed to produce the pressure-reducing diaper waistline which can effectively relieve the waist pressure and improve the contact flexibility so as to reduce the hardness and the glue spraying amount of the elastic area, save the cost, improve the user experience in use and optimize the processing technological process of the existing diaper waistline.
Disclosure of Invention
Aiming at the technical defects in the background art, the invention provides a pressure-reducing waistline of a paper diaper and a manufacturing process thereof, which solve the technical problems and meet the actual requirements, and the specific technical scheme is as follows:
the utility model provides a decompression waistline of panty-shape diapers, includes elasticity hot melt adhesive layer, elasticity hot melt adhesive layer is rectangular form structure, and the positive and negative is equipped with first non-woven fabrics layer and second non-woven fabrics layer respectively, closely laminate in proper order with face and face contact's form between first non-woven fabrics layer, elasticity hot melt adhesive layer, the second non-woven fabrics layer, and, between first non-woven fabrics layer and the second non-woven fabrics layer first non-woven fabrics layer or second non-woven fabrics layer with all closely laminate through fine and close ultrasonic wave solder joint between the side of elasticity hot melt adhesive layer, make first non-woven fabrics layer or second non-woven fabrics layer with the fine and close laminating of surface of elasticity hot melt adhesive layer.
As a further technical solution of the present invention, the width of one side edge of the first nonwoven fabric layer or the second nonwoven fabric layer close to the length direction of the elastic hot melt adhesive layer is narrower than that of the other side edge, and the narrower side edge is covered with a skin-friendly gauze layer.
As a further technical scheme of the invention, the width of one side edge of the first non-woven fabric layer or the second non-woven fabric layer close to the length direction of the elastic hot melt adhesive layer is narrower than that of the other side edge, the edge of the wider side edge is provided with a leakage-proof edge covering, and the inner layer of the leakage-proof edge covering is provided with a flexible skin-friendly silica gel layer.
In a further aspect of the present invention, the first nonwoven fabric layer or the second nonwoven fabric layer has an adhesive portion on one side in the width direction of the elastic hot-melt adhesive layer.
As a further technical scheme of the invention, the bonding part is viscose, magic tape or hasp.
In addition, the invention also provides a manufacturing process of the pressure-reducing waistline of the paper diaper, which comprises the following steps:
a. melting the elastic hot melt adhesive to 120-180 ℃, placing the elastic hot melt adhesive in an adhesive gun, spraying the elastic hot melt adhesive on the surface of a cooling roller which rolls at a constant speed and is provided with an anti-sticking layer on the surface, wherein the spraying shape is a strip, and the gap between the adhesive gun and the cooling roller is 0.1 mm;
b. cooling the strip-shaped elastic hot melt adhesive on a cooling roller for a period of time to ensure that the temperature is 0-18 ℃ to form a telescopic part;
c. the telescopic part is conveyed to a first pressing shaft with an anti-sticking layer on the surface for pressing, and the rolling speed of the first pressing shaft is the same as that of the cooling roller;
d. the first non-woven fabric, the second non-woven fabric and the telescopic part are intersected at a second pressing shaft for direct pressing, and the rolling speed of the second pressing shaft is 1.3-3 times that of the first pressing shaft;
e. carrying out ultrasonic point pressing and laminating on the first non-woven fabric and the second non-woven fabric once to form a pressure-reducing waistline bottom layer;
f. and performing secondary ultrasonic pressure point pressing on the junction of the first non-woven fabric or the second non-woven fabric and the telescopic component of the bottom layer of the pressure-reducing waistline, then adding bonding parts on two sides in the length direction, arranging a skin-friendly yarn layer on one side in the width direction, and arranging a leakage-proof edge covering on the other side to finish the processing of the pressure-reducing waistline.
As a further technical scheme of the invention, in the step a, the melting temperature of the elastic hot melt adhesive has special values of 120 ℃, 140 ℃, 160 ℃ and 180 ℃.
As a further technical scheme of the invention, the anti-sticking layer is made of polytetrafluoroethylene.
As a further technical solution of the present invention, in the step d, a small amount of glue is sprayed or no glue is sprayed on the surface layer of the first nonwoven fabric or the second nonwoven fabric.
The invention has the beneficial effects that: by adopting the speed difference pressing process, the produced elastic hot melt adhesive layer has better ductility and elasticity, and is tightly attached to the first non-woven fabric layer and the second non-woven fabric layer in a 360-degree all-around manner, so that the integral stretching and contraction are ensured to be attached to the skin surface and the surface of a user, the contact area is increased, the pressure of the elastic waistline on the waist is effectively relieved, and the comfort is brought to the user.
Drawings
Fig. 1 is a schematic view of the layered structure of a pressure-reducing waist belt of the present invention.
Fig. 2 is a schematic view of the external structure of the pressure-reducing waist belt of the present invention.
FIG. 3 is a schematic process flow diagram of the present invention.
Wherein: the elastic hot melt adhesive comprises an elastic hot melt adhesive layer 1, an elastic hot melt adhesive 1a, a telescopic component 1b, a side surface 10, a first non-woven fabric layer 2, a first non-woven fabric 2a, a second non-woven fabric layer 3, a second non-woven fabric 3a, a skin-friendly yarn layer 4, a leakage-proof edge covering 5, a flexible skin-friendly silica gel layer 6, an adhesive part 7, a glue gun 8, a cooling roller 9, a first pressing shaft 11, a second pressing shaft 12, an ultrasonic welding device 13, an ultrasonic pressing roller 14 and a pressure-reducing waistline bottom layer 15.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings and related embodiments, wherein the following related embodiments are merely preferred embodiments for better illustrating the present invention itself, and the embodiments of the present invention are not limited to the following embodiments, and the present invention relates to the related essential parts in the technical field, which should be regarded as the known technology in the technical field and can be known and grasped by those skilled in the art.
In the description of the present invention, it is to be understood that the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for the purpose of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated; thus, the definitions "first" and "second" are for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly including one or more of such features.
Referring to fig. 1 and 2, a decompression waistline of a paper diaper comprises an elastic hot melt adhesive layer 1, wherein the elastic hot melt adhesive layer 1 is of a long strip structure, a first non-woven fabric layer 2 and a second non-woven fabric layer 3 are respectively arranged on the front side and the back side of the elastic hot melt adhesive layer 1, the first non-woven fabric layer 2, the elastic hot melt adhesive layer 1 and the second non-woven fabric layer 3 are sequentially and tightly attached in a surface-to-surface contact mode, in addition, the first non-woven fabric layer 2 and the second non-woven fabric layer 3 are sequentially and tightly attached to the elastic hot melt adhesive layer 1 through a tight ultrasonic welding point between the side faces 10 at the edge, so that the first non-woven fabric layer 2 or the second non-woven fabric layer 3 is tightly attached to the outer surface of the elastic hot melt adhesive layer 1.
The traditional paper diaper waistline adopts spandex filaments as elastic bands, and is connected with the non-woven fabric layer in a line contact mode, so that the traditional paper diaper waistline is in line-surface contact with the waist of a user when in use, and the waist of the user can generate alternate tightening marks after a long time, so that great discomfort is brought.
Specifically, as shown in fig. 1, the structure principle of the present invention is that the pressure-reducing waist of the present invention has elasticity, and the elastic hot-melt adhesive layer 1 is disposed at the bottom of the diaper, sandwiched between the first nonwoven fabric layer 2 and the second nonwoven fabric layer 3, and pressed by ultrasonic waves at uniform arrangement points, and includes the side surface 10 which is not at the position parallel to the first nonwoven fabric layer 2 or the second nonwoven fabric layer 3 in the normal state, so that the bottom layer can be more firmly compounded, the glue spraying amount between the first nonwoven fabric layer 2 and the second nonwoven fabric layer 3 can be reduced, even no glue spraying is needed, the hardness of the bottom layer is significantly reduced, the softness of the waist area is increased, and by the above structure, the line-surface contact of the conventional diaper is converted into the surface-surface contact of the new technology, and the contact area between the diaper and the waist of the user is increased, the pressure of the waistline of the paper diaper to the waist is greatly reduced, and the comfort is improved.
Referring to fig. 2, in a preferred embodiment of the present invention, the width of one side edge of the first nonwoven fabric layer 2 or the second nonwoven fabric layer 3 close to the length direction of the elastic hot melt adhesive layer 1 is narrower than that of the other side edge, and the narrower side edge is covered with a skin-friendly yarn layer 4.
The side of the skin-friendly yarn layer 4 is actually equal to the upper edge of the waistline of the paper diaper, so that the skin of the user can be easily extruded when the user bends over, discomfort caused by friction between the paper diaper and the skin can be effectively relieved by the existence of the skin-friendly yarn layer 4, and the overall comfort level is improved.
Referring to fig. 2, in a preferred embodiment of the present invention, the width of one side edge of the first nonwoven fabric layer 2 or the second nonwoven fabric layer 3 close to the length direction of the elastic hot melt adhesive layer 1 is narrower than that of the other side edge, and the wider side edge is provided with a leakage-proof edge 5, and an inner layer of the leakage-proof edge 5 is provided with a flexible skin-friendly silica gel layer 6.
The leakage-proof edge 5 is a boundary between the body of the pressure-reducing waistline and the lower crotch area and the body fluid absorption main body of the diaper, and is equivalent to a locking absorption area, so that the use of the waistline cannot be influenced, the flexible skin-friendly silica gel layer 6 prevents the sealing line of the leakage-proof edge 6 and the crease of the spandex silk waistline in the background technology from extruding with the skin of a person, and the ductility of the leakage-proof edge can play a similar effect to that of the elastic hot melt adhesive layer 1 in the invention.
Referring to fig. 2, in a preferred embodiment of the present invention, an adhesive portion 7 is disposed on one side of the first nonwoven fabric layer 2 or the second nonwoven fabric layer 3 in the width direction of the elastic hot melt adhesive layer 1, and the adhesive portion 7 is a necessary structure for reducing the waist circumference to complete the fastening.
In a preferred embodiment of the present invention, the adhesive part 7 is an adhesive, a hook and loop fastener, which are all commonly used waist-around fastening methods, and can be selected by manufacturers according to actual needs.
Referring to fig. 3, in addition, the invention also provides a manufacturing process of the reduced pressure waistline of the paper diaper, which comprises the following steps:
a. melting the elastic hot melt adhesive to 120-180 ℃, placing the elastic hot melt adhesive in an adhesive gun, and spraying the elastic hot melt adhesive on the surface of a cooling roller 9 which rolls at a constant speed and is provided with an anti-sticking layer on the surface, wherein the spraying shape is a strip shape, and the gap between the adhesive gun 8 and the cooling roller 9 is 0.1 mm;
b. cooling the strip-shaped elastic hot melt adhesive 1a on a cooling roller 9 for a period of time to ensure that the temperature is 0-18 ℃ to form a telescopic part 1 b;
c. the telescopic part 1b is conveyed to a first pressing sheet shaft 11 with an anti-sticking layer on the surface for pressing, and the rolling speed of the first pressing sheet shaft 11 is the same as that of the cooling roller 9;
d. the first non-woven fabric 2a, the second non-woven fabric 3a and the telescopic component 1b are intersected at a second pressing shaft 12 for direct pressing, and the rolling speed of the second pressing shaft 12 is 1.3-3 times of that of the first pressing shaft 11;
e. carrying out ultrasonic pressure point pressing on the first non-woven fabric 2a and the second non-woven fabric 3a once to form a pressure-reducing waistline bottom layer 15 by using an ultrasonic welding device 13 and an ultrasonic pressure roller 14;
f. and (3) performing secondary ultrasonic pressure point pressing on the boundary of the first non-woven fabric 2a or the second non-woven fabric 3a of the bottom layer 15 of the pressure-reducing waistline and the telescopic component 1b, then adding adhesive parts 7 on two sides in the length direction, arranging a skin-friendly yarn layer 4 on one side in the width direction and arranging a leakage-proof edge 5 on the other side, and finishing the processing of the pressure-reducing waistline.
In the production process, except that a certain high temperature is required for melting the material, the whole process is basically finished in a low-temperature state, the ultrasonic pressure point pressing adopted by the final joining operation can generate local high temperature on a welding surface, but the high temperature cannot diffuse into the air, so the welding process can be regarded as normal-temperature or even low-temperature welding, the influence of the whole process on the physical properties of the material is lower, and the bonding effect is betterWherein, the frequency of ultrasonic wave setting is preferably 20KHz, and the welding pressure is preferably 5.0 × 105pa, welding time 1.4s, dwell time 1.1s can make between non-woven fabrics and the non-woven fabrics or the combination between non-woven fabrics and the elasticity hot melt adhesive inseparabler, and process time is shorter, satisfies the requirement of time length.
After the elastic hot melt adhesive 1a is sprayed out from the adhesive gun 8, the distance between the adhesive gun 8 and the cooling roller 9 is small, so that the thickness of the produced elastic hot melt adhesive 1a is originally low, and the elastic hot melt adhesive is subjected to 2 times of pressing by the pressing rollers with different rotating speeds, so that the telescopic part 1b produced by the first pressing and the telescopic part 1b produced by the second pressing have different telescopic performances, particularly, the speed of the second pressing is different, the physical properties of the telescopic part 1b are changed, and therefore, the elastic hot melt adhesive has better telescopic performance compared with the existing product, the thickness is extremely low, the laminating area with the non-woven fabric layer is increased, and the overall telescopic effect of the pressure-reducing waistline is improved.
As for the initial rotation speed of the cooling roll 9, the first sheeting shaft 11 is preferably set to 30mm/s, the initial rotation speed of the second sheeting shaft 12 is preferably 40mm/s, i.e., about 1.33 times of the rotation speed of the first sheeting shaft 11 or the cooling roll 9, and the maximum rotation speed is not more than 90mm/s, so that the stretch ratio of the elastic stretching member 1b obtained can be controlled to be in the range of more than 1 and not more than 3.
In the process of combining the first non-woven fabric 2a, the second non-woven fabric 3a and the elastic hot melt adhesive 1a, ultrasonic pressure point pressing not only enables the first non-woven fabric 2a and the second non-woven fabric 3a to be tightly combined with each other, but also enables the elastic hot melt adhesive 1a and the 2 component supports to be tightly combined with each other, particularly the side surface 10, which is a part located at the edge area of the elastic hot melt adhesive layer 1 and easy to leak, so that a relatively sliding area cannot be generated among the first non-woven fabric 2a, the second non-woven fabric 3a and the elastic hot melt adhesive 1a, and; and finally, finishing the installation of the external component in the step f, so that the final forming of the pressure-reducing waistline can be used in the production application of the paper diaper, and the correct effect can be exerted.
In ultrasonic lamination, three different lamination modes of wavy embossing, strip embossing or dot embossing can be performed according to requirements, wherein the dot embossing has the largest lamination density and the better lamination tightness, and generally the dot embossing lamination mode is preferably used.
In addition, as the pressure-reducing waistline produced by the process of the invention, namely the structure formed by tightly attaching the non-woven fabric layer and the elastic extensible component 1b, the pressure-reducing waistline can be applied to other parts needing the pressure-reducing fastening effect due to good extensible performance and pressure-reducing effect; meanwhile, the elastic telescopic component 1b manufactured in the production process can be independently used as different components such as waistline, lifting rubber bands, leg rubber bands, three-dimensional rubber bands and the like, and has the possibility of multiple application modes.
In a preferred embodiment of the present invention, in the step a, the melting temperature of the elastic hot melt adhesive 1a has special values of 120 ℃, 140 ℃, 160 ℃ and 180 ℃, and the elastic hot melt adhesive 1a is melted in the adhesive cylinder until the target temperature is reached, and then enters the adhesive gun for spraying production.
The elastic hot melt adhesive 1a produced at the melting state of 120 ℃ and 180 ℃ has better ductility and poorer ductility at 120 ℃ and the elastic hot melt adhesive produced at 180 ℃ has better ductility and poorer toughness, but can meet the use requirements.
Wherein, the processing performance of the elastic hot melt adhesive is described by combining the temperature, in order to better process the elastic hot melt adhesive in the production, and the processed elastic hot melt adhesive has the required extensibility and toughness, and the processing temperature is greatly influenced by the physical properties of the elastic hot melt adhesive, wherein the value of the melt viscosity is about 60000 mPas at the processing temperature of 120 ℃, about 17000 mPas at the processing temperature of 140 ℃, about 6700 mPas at the processing temperature of 160 ℃, and reaches 3100 mPas at the processing temperature of 180 ℃.
For optimum processability and application properties, the operating temperature is preferably set at from 150 ℃ to 170 ℃ so that the melt viscosity of the elastic hot-melt adhesives produced is in the range from 4500-. Further, if the melt viscosity of the elastic hot melt adhesive is less than 3100mPa · s, the stress upon elongation of the resulting stretchable member is insufficient; on the other hand, if the melt viscosity of the elastic hot melt adhesive exceeds 60000 mPas, the viscosity becomes too high during the coating process, resulting in coating unevenness. Within the temperature range involved in step a of the present invention, the properties of the produced elastic hot melt adhesive substantially meet the requirements.
It should be noted that, in the production process of the elastic hot melt adhesive of the present invention, the elastic hot melt adhesive can not be mixed with other adhesives and can be used alone, otherwise, the melt viscosity performance can be unexpectedly affected, and the serious problem of great fluctuation of production quality is possibly caused; in the present invention, the softening temperature of the elastic hot melt adhesive is 95 ℃, so that attention needs to be paid to the change of the melt viscosity of the elastic hot melt adhesive from the temperature node.
In a preferred embodiment of the present invention, the anti-sticking layer is made of teflon.
The processing of elasticity hot melt adhesive 1a can be made things convenient for to utilize antiseized layer, makes the polymerization that it can be better take shape, and the elasticity hot melt adhesive layer 1's that the guarantee was produced performance can satisfy the operation requirement to reduce the adhesion to chill roll 9, make it can not influence subsequent processing and improve the use amount of raw and other materials.
In a preferred embodiment of the present invention, in the step d, a small amount of glue is sprayed or no glue is sprayed on the surface layer of the first nonwoven fabric 2a or the second nonwoven fabric 3 a.
Because the welding form of ultrasonic pressure point pressing is adopted, the thickness of the elastic hot melt adhesive layer 1 becomes very thin due to the processing characteristics, and the corresponding contact area is also increased, so the non-woven fabric layer can be very tightly combined with the elastic hot melt adhesive layer 1 without the help of viscose, the production cost is reduced, and as for the standard of a small amount of glue spraying, the standard glue spraying amount in the conventional production is below 40 percent as a reference value.
The invention has the beneficial effects that: by adopting the speed difference pressing process, the produced elastic hot melt adhesive layer 1 has better ductility and elasticity and is tightly attached to the first non-woven fabric layer 2 and the second non-woven fabric layer 3 in a 360-degree all-around manner, so that the integral extension and contraction are ensured to be attached to the skin surface and the surface of a user, the contact area is increased, the pressure of the elastic waistline on the waist is effectively relieved, and the comfort is brought to the user.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a decompression waistline of panty-shape diapers, its characterized in that, includes elasticity hot melt adhesive layer, elasticity hot melt adhesive layer is rectangular form structure, and the positive and negative is equipped with first non-woven fabrics layer and second non-woven fabrics layer respectively, closely laminate in proper order with the form of face and face contact between first non-woven fabrics layer, elasticity hot melt adhesive layer, the second non-woven fabrics layer, and, between first non-woven fabrics layer and the second non-woven fabrics layer first non-woven fabrics layer or second non-woven fabrics layer with all closely laminate through fine and close ultrasonic wave solder joint between the side of elasticity hot melt adhesive layer, make first non-woven fabrics layer or second non-woven fabrics layer with the fine and close laminating of surface of elasticity hot melt adhesive layer.
2. The pressure-reducing waistline of the paper diaper as claimed in claim 1, wherein the width of one side edge of the first non-woven fabric layer or the second non-woven fabric layer close to the length direction of the elastic hot-melt adhesive layer is narrower than that of the other side edge, and the edge of the narrower side edge is wrapped with a skin-friendly gauze layer.
3. The pressure-reducing waistline of the paper diaper as claimed in claim 1, wherein the first non-woven fabric layer or the second non-woven fabric layer has a narrower width at one side edge close to the length direction of the elastic hot-melt adhesive layer than at the other side edge, and the wider side edge is provided with a leakage-proof wrapping edge, and an inner layer of the leakage-proof wrapping edge is provided with a flexible skin-friendly silica gel layer.
4. The pressure-reducing waist circumference of the disposable diaper as claimed in claim 1, wherein the first or second nonwoven fabric layer has an adhesive portion on one side thereof in the width direction of the elastic hot-melt adhesive layer.
5. The pressure-reducing waist circumference of the disposable diaper as claimed in claim 4, wherein said adhesive portion is an adhesive, a hook and loop fastener, or a hook and loop fastener.
6. A manufacturing process of a pressure-reducing waistline of a paper diaper is characterized by comprising the following steps:
a. melting the elastic hot melt adhesive to 120-180 ℃, placing the elastic hot melt adhesive in an adhesive gun, spraying the elastic hot melt adhesive on the surface of a cooling roller which rolls at a constant speed and is provided with an anti-sticking layer on the surface, wherein the spraying shape is a strip, and the gap between the adhesive gun and the cooling roller is 0.1 mm;
b. cooling the strip-shaped elastic hot melt adhesive on a cooling roller for a period of time to ensure that the temperature is 0-18 ℃ to form a telescopic part;
c. the telescopic part is conveyed to a first pressing shaft with an anti-sticking layer on the surface for pressing, and the rolling speed of the first pressing shaft is the same as that of the cooling roller;
d. the first non-woven fabric, the second non-woven fabric and the telescopic part are intersected at a second pressing shaft for direct pressing, and the rolling speed of the second pressing shaft is 1.3-3 times that of the first pressing shaft;
e. carrying out ultrasonic point pressing and laminating on the first non-woven fabric and the second non-woven fabric once to form a pressure-reducing waistline bottom layer;
f. and performing secondary ultrasonic pressure point pressing on the junction of the first non-woven fabric or the second non-woven fabric and the telescopic component of the bottom layer of the pressure-reducing waistline, then adding bonding parts on two sides in the length direction, arranging a skin-friendly yarn layer on one side in the width direction, and arranging a leakage-proof edge covering on the other side to finish the processing of the pressure-reducing waistline.
7. The process for manufacturing a pressure-reducing waist circumference of a diaper as claimed in claim 6, wherein in said step a, the melting temperature of said elastic hot-melt adhesive has specific values of 120 ℃, 140 ℃, 160 ℃ and 180 ℃.
8. The process for making a reduced-pressure waist circumference of a diaper according to claim 6, wherein said anti-sticking layer is made of polytetrafluoroethylene.
9. The process for manufacturing a reduced-pressure waistline of a diaper as claimed in claim 6, wherein in the step d, a small amount of glue is sprayed or no glue is sprayed on the surface layer of the first nonwoven fabric or the second nonwoven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113855397A (en) * | 2021-10-21 | 2021-12-31 | 广东昱升个人护理用品股份有限公司 | Comfortable paper diaper and manufacturing method thereof |
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