CN106038085A - Paper diaper core, paper diaper core manufacturing technology and viscose spraying technology - Google Patents

Abstract

The invention discloses a diaper core body, a diaper core body manufacturing process and a glue spraying process. The diaper core body includes upper and lower wrapping layers, an absorbent core layer and an adhesive layer, and the adhesive layer is located on the upper and lower wrapping layers. Between the layers, the adhesive layer includes multiple groups of adhesives for bonding the upper and lower wrapping layers, and the plurality of sets of adhesives are distributed at intervals along the width direction or length direction of the upper and lower wrapping layers, each An independent accommodating space is formed between two adjacent viscose bodies; the absorbent core layer includes several absorbent cores. The glue spraying process includes using the first conveying device to continuously move the layer to be sprayed to the direction of the first glue spraying device, and in the process of continuously moving forward, control the multiple edges of the first glue spraying device along the direction of the glue to be sprayed. The fifth nozzles arranged side by side in the width direction of the layer and having a first predetermined distance between them spray glue to the glue-spraying surface of the glue-spraying layer to form a plurality of groups of viscose bodies that are evenly spaced along the width direction of the diaper core. .

Description

A kind of diaper core body, diaper core body manufacturing process and glue spraying process

technical field

The invention relates to the field of sanitary products, in particular to a diaper core body, a manufacturing process for the diaper core body and a glue spraying process.

Background technique

Diapers are a commonly used sanitary product. Generally speaking, diapers are composed of three main parts: cover layer, absorbent core and base fabric. The surface coating layer can also be called a coating layer or a water-permeable surface layer. The coating layer is close to the user's body, which can promote the rapid penetration of urine and effectively prevent back seepage, so that the surface layer of the diaper can be kept dry. At present, the covering layer of diapers in the domestic market is basically a non-woven surface layer. The breathable non-woven fabric can improve the air permeability inside the diaper, and the water vapor can circulate outside the diaper, and the moisture and heat can be discharged in time, effectively reducing the air permeability of the diaper. The chance of diaper rash, soft and comfortable without irritating the skin. The absorbent core can also be called the absorbent core or the absorbent core. The main function of the absorbent core is to capture and quickly absorb urine, disperse it or diffuse it into the entire core layer through capillary action, and finally absorb and release it. Store urine. The absorbent core generally includes a wrapping layer, a lower adhesive layer, an absorbent core layer, an upper adhesive layer and an upper wrapping layer arranged in sequence from bottom to top. The base fabric is the outermost structure of the diaper, which is impermeable and can prevent the moisture in the absorbent core from seeping out, so it can also be called an impermeable bottom layer.

As people's requirements for diapers increase, in order to facilitate their use, people require diapers not only to be light and thin, but also to have good absorption and fast diffusion, etc. Therefore, in order to make products more suitable for people's needs, manufacturers , Usually work hard on the wrapping layer and absorbent core of diapers to improve the lightness, absorbency and diffusibility of diapers. For example, the wrapping layer is replaced with lighter and more breathable non-woven paper or non-woven fabric, but even if more breathable non-woven paper or non-woven fabric is used, it cannot greatly make the diapers lighter and thinner. Another example is reducing the thickness of the absorbent core while increasing the amount of Super Absorbent Polymer (SAP) used to make the absorbent core thinner and more absorbent. In the prior art, in the manufacturing process of the absorbent core, the spraying method of the upper adhesive layer is a full spray method, that is, the surface of the absorbent core is fully sprayed by a glue spraying tool. This full spray process cannot Spray evenly on the surface of the absorbent core, there may be cases where the spray glue is thicker in some positions, and thinner in some positions, etc. The spray glue in this way will greatly affect the height below the upper adhesive layer. The water absorption work of water-absorbent resin, even if more super-absorbent resin is added or all the absorbent core layer is replaced with super-absorbent resin, the liquid cannot penetrate into the absorbent core from the water-permeable surface layer very quickly; at the same time, the method of full spray also increases The amount of glue is reduced, which is not conducive to saving costs. In summary, how to provide a diaper core and diapers with good absorbency, fast diffusion, and improved dryness of the water-permeable surface layer of the diaper has become an urgent problem to be solved.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: to provide a diaper core that only needs to change the structure of the upper adhesive layer to make the product have better water absorption, faster diffusion, and thinner , Manufacturing process of diaper core body and glue spraying process.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide a diaper core, including an upper wrapping layer, an absorbent core layer, an adhesive layer and a lower wrapping layer, and the adhesive layer is located between the upper wrapping layer and the lower wrapping layer. Between the wrapping layers, the viscose layer includes multiple groups of viscose bodies for bonding the upper wrapping layer and the lower wrapping layer, and the plurality of groups of viscose bodies are spaced along the width direction or the length direction of the upper and lower wrapping layers distribution, an independent accommodation space is formed between every two adjacent viscose bodies; the absorbent core layer includes a number of one-to-one corresponding absorbent cores located in the accommodation space.

Further, the multiple sets of viscose are evenly distributed between the upper wrapping layer and the lower wrapping layer along the width direction or length direction of the diaper core, so that the upper wrapping layer and the lower wrapping layer are separated by corresponding A set of viscose bodies bonded.

Further, when the multiple groups of viscose bodies are evenly spaced along the length direction of the diaper core, the length of each group of viscose bodies matches the width of the upper wrapping layer or the lower wrapping layer.

Further, when the multiple groups of viscose bodies are evenly distributed along the width direction of the diaper core, the length of each group of viscose bodies matches the length of the upper wrapping layer or the lower wrapping layer.

Further, the viscose body is in the shape of a strip.

Further, the viscose body is in the shape of a spiral ribbon.

Further, each of the absorbent cores is composed of several polymer water-absorbent resin particles.

Wherein, the several polymer water-absorbent resin particles of each absorbent core are evenly placed in the corresponding accommodation space.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a glue spraying process for the absorbent core of diapers, which is used to apply glue to the glue layer of the absorbent core of diapers by using the first glue spraying device. Glue spraying on the surface, use the first conveying device to make the layer to be sprayed continue to move forward in the direction of the first glue spraying device, and control the multiple layers of the first glue spraying device along the direction of the glue spraying device during the continuous forward movement. The fifth nozzles arranged side by side in the width direction with a first predetermined distance between them spray glue to the glue-spraying surface of the layer to be glue-sprayed, thereby forming multiple groups of viscose bodies evenly spaced along the width direction of the diaper core.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a manufacturing process for a diaper core, which includes the following steps:

The first step, the unwinding and conveying process of the lower wrapping layer: it is used to unwind the finished roll of the lower wrapping layer and then use the conveying device to move the lower wrapping layer continuously forward in the direction of the first polymer water-absorbent resin spraying device;

The second step, polymer water-absorbent resin spraying process: use the first polymer water-absorbent resin spraying device to spray polymer water-absorbent resin particles to the lower wrapping layer that is continuously moving forward horizontally; the first polymer water-absorbent resin spraying device has multiple a first spray nozzle arranged side by side along the width direction of the lower wrapping layer with a third predetermined distance between them, the first spray nozzles are vertically facing the upper surface of the lower wrapping layer;

The third step, the upper wrapping layer compounding process, this process includes the following sub-processes:

1) The sub-process of unwinding and conveying the upper wrapping layer: it is used to unwind the finished roll of the upper wrapping layer and then use the conveying device to move the upper wrapping layer continuously forward in the direction of the composite device;

2) Sub-process of glue spraying on the upper wrapping layer: during the process of continuously transporting the upper wrapping layer to the composite device by the conveying device, the glue spraying process of the upper wrapping layer is carried out. Wherein, use the first glue spraying device 33 located between the composite device and the first installation shaft to spray glue on the upper wrapping layer of the diaper core and the side to be bonded with the lower wrapping layer. The first glue spraying device 33 has multiple The fifth nozzles arranged side by side along the width direction of the upper wrapping layer and having a first predetermined distance between them spray glue to the surface to be sprayed to form a plurality of groups of viscose bodies that are evenly spaced along the width direction of the diaper core;

3) Composite sub-process: After completing the glue spraying process in step 2), the conveying device continues to drive the upper wrapping layer sprayed with viscose to move to the compounding device, so that the upper wrapping layer is compounded on the lower wrapping layer, after compounding , each group of viscose bodies is just located between corresponding two adjacent absorbent cores;

The fourth step, product cutting process;

The fifth step, product winding.

The diaper core body, the diaper core body manufacturing process and the glue spraying process of the present invention only need to change the glue spraying process in the diaper manufacturing process, increase the number of fifth nozzles of the first glue spraying device, and make the fifth nozzles The width direction of the layers is arranged side by side, and while the layer to be sprayed continues to move forward, the structure of the adhesive layer of the diaper can be changed by spraying the multiple nozzles. The amount of change is very small, and only the nozzle needs to be changed. drive mode. This improvement reduces the area of glue spraying and saves the amount of glue used. Under the same amount of glue, more products can be bonded by spraying glue in this way, which saves the production cost of the product; enables urine to penetrate more evenly The absorbent core layer will not be concentrated in a certain place and then infiltrated into the absorbent core layer, thereby reducing the diffusion performance and absorption speed of the absorbent core layer; 3. Make each adjacent two groups of viscose bodies form an independent space for accommodating The space of the absorbent core makes the core of the diaper of the present invention lighter and thinner, and has higher absorbency and diffusivity.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of an embodiment of the diaper core of the present invention.

Fig. 2 is a cross-sectional view of an embodiment of the diaper core of the present invention.

Fig. 3 is a process drawing of the core body of the diaper of the present invention.

Fig. 4 is an exploded view of an embodiment of the diaper core of the present invention.

Fig. 5 is a schematic structural view of an embodiment of the diaper of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1 and Fig. 2, the core body of the diaper of this embodiment includes an upper wrapping layer 80, an absorbent core layer, an adhesive layer 84 and a lower wrapping layer 86, and the adhesive layer 84 is located between the upper wrapping layer 80 and the lower wrapping layer. Between the layers 86, the viscose layer 84 includes a plurality of groups of viscose bodies 841 for bonding the upper wrapping layer 80 and the lower wrapping layer 86, and the plurality of groups of viscose bodies 841 are along the upper and lower wrapping layers 86. The width direction or the length direction are distributed at intervals, and an independent accommodation space 88 is formed between each adjacent two viscose bodies 841; the absorbent core layer includes a number of absorbent cores located in the accommodation space 88 corresponding to 82.

In this embodiment, both the upper wrapping layer 80 and the lower wrapping layer 86 are non-woven fabrics. In other embodiments, the upper wrapping layer 80 and/or the lower wrapping layer may use other thin, soft, and air-permeable fiber layers other than non-woven fabrics, such as puffed paper, toilet paper, and the like.

The upper wrapping layer 80 matches the lower wrapping layer 86 in shape and size, and completely covers the lower wrapping layer 86 . The upper wrapping layer 80 and the lower wrapping layer 86 are bonded by spray glue or ultrasonic bonding, and an independent accommodating space 88 is formed between each two viscose bodies 841 for filling the absorbent core 82 . in:

In this embodiment, the plurality of viscose bodies 841 are evenly distributed between the upper wrapping layer 80 and the lower wrapping layer 86 along the width direction of the diaper core, so that the upper wrapping layer 80 and the lower wrapping layer 86 Each interval in the width direction is bonded by a corresponding group of glue bodies 841 . The length of each group of viscose bodies 841 matches the length of the diaper core (the length of each viscose body 841 can be equal to the length of the upper wrapping layer 80 and/or the lower wrapping layer 86, or slightly shorter than the upper wrapping layer 80 or the length of the lower wrapping layer 86 to reserve the upper wrapping layer 80 and the lower wrapping layer 86 edge sealing area, or slightly longer than the length of the upper wrapping layer 80 or the lower wrapping layer 86, that is, the length of each viscose body 841 plus the sealant The width of limit equals the length of diaper core body.Described edge sealing can adopt the mode of viscose bonding to carry out edge sealing, and a plurality of limits of described upper wrapping layer 80 and lower wrapping layer 86 are bonded together, with Each accommodating space 88 forms a closed accommodating space 88. Understandably, in other embodiments, any existing upper wrapping layer 80 and lower wrapping layer 86 of the absorbent article can also be used to seal the edges. The edge sealing is carried out in the same way), that is, the length direction of each group of viscose bodies 841 is perpendicular to the width direction of the diaper core, close to perpendicular or at a certain angle.

In this solution, each group of viscose bodies 841 is in the shape of a long strip, long strip or spiral band with a certain length (matching the length of the diaper core), when each group of viscose bodies 841 is in the shape of a long In the case of belt or strip, it is formed by spraying glue on the upper surface of the lower wrapping layer 86 with a plurality of first nozzles arranged side by side along the width direction of the diaper core with a certain distance from each other. When each group of viscose 841 is in the shape of a spiral ribbon, use a plurality of second nozzles arranged side by side along the width direction of the diaper core with a certain distance from each other to make a swirling motion and spray on the upper surface of the lower wrapping layer 86. Formed by spraying glue.

In other embodiments, the multiple groups of viscose bodies 841 are evenly distributed between the upper wrapping layer 80 and the lower wrapping layer 86 along the length direction of the diaper core, so that the upper wrapping layer 80 and the lower wrapping layer 86 Each interval in the length direction is bonded by a corresponding group of glue bodies 841 . The length of each group of viscose bodies 841 matches the width of the diaper core (the length of each viscose body 841 can be equal to the width of the upper wrapping layer 80 and/or the lower wrapping layer 86, or slightly smaller than the upper wrapping layer 80 And/or the width of the lower wrapping layer 86 is to reserve the area of the upper wrapping layer 80 and the lower wrapping layer 86 edge sealing, or slightly longer than the width of the upper wrapping layer 80 or the lower wrapping layer 86, that is, the length of each viscose body 841 In addition, the width of the edge banding is equal to the width of the diaper core), that is, the length direction of each group of viscose bodies 841 is perpendicular to, nearly perpendicular to, or at a certain angle with the length direction of the diaper core.

In this scheme, each group of viscose bodies 841 is in the shape of a long strip, long strip or spiral band with a certain length (matching the width of the diaper core), when each group of viscose bodies 841 is in the shape of a long In the case of belt or strip, it is formed by spraying glue on the upper surface of the lower wrapping layer 86 with a plurality of third nozzles arranged side by side along the length direction of the diaper core with a certain distance from each other. In a specific glue spraying process, the third nozzle moves and sprays glue obliquely from one side of the lower wrapping layer 86 to the opposite side and in the conveying direction of the lower wrapping layer 86, and the speed of the tilting movement is the same as that of the lower wrapping layer 86. The conveying speed is matched so as to ensure that the length direction of the viscose body 841 is perpendicular or nearly perpendicular to the length direction of the diaper core. In addition, the driving device for driving the third nozzle adopts reciprocating drive, that is, after the third nozzle is driven to move to the other side, the third nozzle is driven to continue the next glue spray reset according to the inclined movement track, that is, from the lower The other side of the wrapping layer 86 moves to spray glue to the opposite side and to an inclination opposite to the conveying direction, thereby completing two glue sprays. The driving device can be driven by a motor, and the moving speed of the third nozzle can be controlled by a program, so that it can achieve: the function of distributing multiple groups of viscose bodies 841 evenly spaced along the length direction of the diaper core or result. Understandably, when the length of the adhesive strip is not required to be perpendicular or nearly perpendicular to the length direction of the diaper, the third nozzle can also be directly driven reciprocatingly along the width direction of the diaper core without considering the inclination of the third nozzle.

When each group of viscose 841 is in the shape of a spiral ribbon, use a plurality of fourth nozzles arranged side by side along the length direction of the diaper core with a certain distance from each other to make a swirling motion and spray on the upper surface of the lower wrapping layer 86. Formed by spraying glue. The driving method of the fourth nozzle is the same as that of the above-mentioned third nozzle, and will not be repeated here.

In this embodiment, each absorbent core 82 is composed of several polymer water-absorbent resin particles, and the several polymer water-absorbent resin particles of each absorbent core 82 are evenly placed (sprayed) in the corresponding accommodating space 88 Inside. The polymer water-absorbent resin can adopt polymer water-absorbent resin particles with large particle size and good liquid permeability, that is, each group of absorbent cores 82 is composed of several polymer water-absorbent resin particles. The absorbent core layer is all made of polymer water-absorbent resin particles, which is conducive to improving the infiltration speed and dryness, and can make the absorbent core layer more light and thin, and have higher water absorption and water-locking performance.

In the embodiment of the present invention, since multiple groups of viscose bodies 841 isolate the space between the upper wrapping layer 80 and the lower wrapping layer 86 into several accommodating spaces 88 for accommodating the absorbent core 82, the multiple groups of absorbent cores 82 One-to-one correspondence is located in one accommodation space 88, which can reduce the amount of absorbent core 82. At the same time, when the absorbent core 82 uses polymer water-absorbent resin particles, it can tightly lock the polymer water-absorbent resin particles in each independent In the accommodating space 88, since the polymer water-absorbing resin has extremely high water absorption, water-locking properties, and extremely fast diffusivity, only a very thin layer of the absorbent core 82 is needed to achieve the high molecular weight of the prior art. The absorbent core 82 combined with water-absorbent resin and fluffy non-woven fabric has even better functions and effects in various aspects, which greatly reduces the thickness of the diaper core, and the light and thin absorbent core 82 makes the user experience higher. Satisfaction is greater.

In addition, the use of mutually spaced viscose bodies 841, compared with the full spray method in the prior art, greatly reduces the amount of glue used, improves the absorption speed and diffusion performance of the product, and greatly improves the dry performance of the product.

Compared with the absorbent core 82 in the prior art (the middle layer is a fluffy non-woven fabric layer, polymer water-absorbing resin is sprayed on the upper and lower surfaces of the fluffy non-woven fabric layer), the absorbent core 82 is evenly sprayed on an independent container placed in the space 88 (a small amount of glue can be used to evenly distribute the polymer water-absorbent resin particles in the accommodating space 88 to prevent them from scurrying or easily moving to cause uneven thickness problems), which can prevent the polymer water-absorbent resin from falling, It will cause waste, etc., and once the polymer water-absorbent resin falls on the surface of the product (diaper core or surface of the diaper), it will easily affect the health of users.

In the embodiment of the present invention, since the structure of the absorbent core 82 is completely changed, the polymer water-absorbent resin is evenly filled into the independent space, so the phenomenon that the polymer absorbent core 82 is easy to be delaminated with the fluffy non-woven fabric does not occur, and the improvement is improved. Reduced user satisfaction and experience.

The invention also discloses a glue spraying process for the core body of diapers, which is used to spray glue on the glue-spraying surface of the glue-spraying layer of the core body of the diaper by using the first glue spraying device. The glue spraying process is as follows: using the first glue spraying device The conveying device keeps the glue-spraying layer moving forward toward the first glue-spraying device, and controls the first glue-spraying device to be arranged side by side along the width direction of the glue-spraying layer and mutually The fifth nozzle with the first predetermined distance sprays glue to the glue-spraying surface of the glue-spraying layer, thereby forming a plurality of groups of viscose bodies 841 uniformly spaced apart along the width direction of the diaper core.

As a more preferred implementation manner, the fifth nozzle sprays glue toward the glue-spraying surface of the glue-spraying layer in a circular motion. Further as an optional or preferred embodiment, the orbital movement surface of the fifth nozzle is parallel to the surface to be glued of the layer to be glued. Understandably, in some embodiments, the orbiting surface of the fifth nozzle can be nearly parallel to the surface to be sprayed, or form a certain angle with the surface to be sprayed, as long as the fifth nozzle It only needs to make each group of viscose bodies 841 in the shape of a plane spiral ribbon by spraying the glue in a circular motion.

In this embodiment, the glue-spraying layer of the core of the diaper is the lower wrapping layer 86, and the surface of the lower wrapping layer 86 to be glued is the upper surface of the lower wrapping layer 86; 86 continues to move forward in the direction of the first glue spraying device, and in the process of continuously moving forward, control a plurality of fifth nozzles of the first glue spraying device arranged side by side along the width direction of the lower wrapping layer 86 to lower the wrapping layer The upper surface of the upper surface of 86 sprays glue in a circular motion, thereby forming the lower glue layer 84 with multiple sets of second glue bodies 841 in the shape of plane spiral ribbons.

In other embodiments, the layer to be sprayed can also be the upper wrapping layer 80, and the surface to be sprayed of the upper wrapping layer 80 is the lower surface of the upper wrapping layer 80, and the glue spraying method is the same or similar to the above method , when spraying glue on the upper wrapping layer 80, the first predetermined distance between every adjacent two fifth nozzles matches the width of the corresponding absorbent core 82 sprayed on the lower wrapping layer 86 before the glue spraying, each phase The spacing between adjacent two groups of absorbent cores 82 matches the width of the viscose body 841 ejected by a corresponding fifth nozzle, and at the same time, the spacing between each adjacent two groups of absorbent cores 82 is The position on the lower wrapping layer 86 matches the position of the viscose body 841 sprayed on the upper wrapping layer 80 by the corresponding fifth nozzle, so that when the upper wrapping layer 80 is covered on the lower wrapping layer 86, it is positioned on the upper wrapping layer 86. The position of the viscose body 841 of the layer 80 is just pressed against the position between the corresponding two adjacent absorbent cores 82 (polymer water-absorbent resin), so that the two adjacent viscose bodies of the prepared diaper core The accommodating space 88 for accommodating the absorbent core 82 is formed between 841 .

In the embodiment of the present invention, it is only necessary to change the glue spraying process in the manufacturing process of diapers, increase the number of fifth nozzles of the first glue spraying device, arrange the fifth nozzles side by side along the width direction of the layer to be glued, and make the glue to be sprayed While the layer continues to move forward, the structure of the adhesive layer 84 of the diaper can be changed by spraying glue through the multiple nozzles. The amount of change is very small, and only the driving mode of the nozzles needs to be changed. This improvement reduces the area of glue spraying and saves the amount of glue used. Under the same amount of glue, more products can be bonded by spraying glue in this way, which saves the production cost of the product; enables urine to penetrate more evenly The absorbent core layer is not concentrated in a certain place and then infiltrated into the absorbent core layer, thereby reducing the diffusion performance and absorption speed of the absorbent core layer; 3. Make each adjacent two groups of viscose bodies 841 form an independent container Place the space for the absorbent core 82, so that the diaper core of the present invention is lighter and thinner, and has higher absorbency and diffusivity.

The invention also discloses another glue spraying process for the diaper core, which is used to spray glue to the surface to be sprayed of the glue layer of the diaper core by using the second glue spraying device. The glue spraying process is as follows: using the second glue spraying device The second conveying device makes the layer to be glued to be sprayed continue to move forward in the direction of the second glue spraying device, and controls the second glue spraying device to be arranged side by side along the length direction of the glued layer to be sprayed and mutually The sixth nozzles with a second predetermined distance between them spray glue to the glue-spraying surface of the glue-spraying layer, thereby forming a plurality of groups of viscose bodies 841 uniformly spaced apart along the width direction of the diaper core. specifically:

Driven by a driving device, the second glue spraying device tilts and sprays glue from one side of the layer to be sprayed to the opposite side and forward (the conveying direction of the layer to be sprayed). Matching with the conveying speed of the lower wrapping layer 86, so as to ensure that the length direction of the viscose body 841 is perpendicular to or nearly perpendicular to the length direction of the core body of the diaper.

As a more preferred implementation manner, the sixth nozzle sprays glue in a circular motion towards the surface to be glued to the layer to be glued. Further as an optional or preferred embodiment, the swirling movement surface of the sixth nozzle is parallel to the surface to be glued of the layer to be glued. It can be understood that, in some embodiments, the swirling movement surface of the sixth nozzle can be nearly parallel to the surface to be sprayed, or form a certain angle with the surface to be sprayed, as long as the sixth nozzle It only needs to make each group of viscose bodies 841 in the shape of a plane spiral ribbon by spraying the glue in a circular motion.

The same as or similar to the above-mentioned glue spraying process, in this embodiment, the layer to be sprayed on the core of the diaper is the lower wrapping layer 86, and the surface to be sprayed on the lower wrapping layer 86 is the upper surface of the lower wrapping layer 86. The second conveying device is used to make the lower wrapping layer 86 continue to move forward in the direction of the second glue spraying device, and in the process of continuously moving forward, control a plurality of second glue spraying devices along the lower wrapping layer 86 The sixth nozzles arranged side by side in the width direction spray glue on the upper surface of the lower wrapping layer 86 in a swirling motion, thereby forming the lower glue layer 84 with multiple sets of second glue bodies 841 in the shape of planar spiral ribbons.

In other embodiments, the layer to be sprayed can also be the upper wrapping layer 80, and the surface to be sprayed of the upper wrapping layer 80 is the lower surface of the upper wrapping layer 80, and the glue spraying method is the same or similar to the above method , when spraying glue on the upper wrapping layer 80, the second predetermined distance between every adjacent two sixth nozzles matches the width of the corresponding absorbent core 82 sprayed on the lower wrapping layer 86 before the glue spraying, each phase The spacing between adjacent two groups of absorbent cores 82 matches the width of the viscose 841 ejected by a corresponding sixth nozzle, and at the same time, the spacing between each adjacent two groups of absorbent cores 82 is at the lower The position on the wrapping layer 86 matches the position of the viscose body 841 sprayed on the upper wrapping layer 80 by the corresponding fifth nozzle, so that when the upper wrapping layer 80 is covered on the lower wrapping layer 86, it is positioned on the upper wrapping layer 86. The position of the viscose body 841 of the layer 80 is just pressed against the position between the corresponding two adjacent absorbent cores 82, so that a storage space is formed between the two adjacent viscose bodies 841 of the finished diaper core. The accommodating space 88 of the absorbent core 82 .

In the embodiment of the present invention, it is only necessary to change the glue spraying process in the manufacturing process of diapers, increase the number of sixth nozzles of the second glue spraying device, arrange the sixth nozzles side by side along the width direction of the layer to be glued, and make the glue to be sprayed While the layer continues to move forward, the structure of the adhesive layer 84 of the diaper can be changed by spraying glue through the multiple nozzles. The amount of change is very small, and only the driving mode of the nozzles needs to be changed. This improvement reduces the area of glue spraying and saves the amount of glue used. Under the same amount of glue, more products can be bonded by spraying glue in this way, which saves the production cost of the product; enables urine to penetrate more evenly The absorbent core layer is not concentrated in a certain place and then infiltrated into the absorbent core layer, thereby reducing the diffusion performance and absorption speed of the absorbent core layer; 3. Make each adjacent two groups of viscose bodies 841 form an independent container Place the space for the absorbent core 82, so that the diaper core of the present invention is lighter and thinner, and has higher absorbency and diffusivity. Spraying glue on the lower surface of the upper wrapping layer 80 is better than spraying glue on the upper surface of the lower wrapping layer. After the glue spraying of the upper wrapping layer 80 is completed, the upper wrapping layer 80 can be directly compounded on the lower wrapping layer 86. The upper wrapping layer 80 The filling of the absorbent core 82 on the lower wrap layer 86 has been completed prior to the glue spraying process. Such an advantage is to make the time interval between the glue spraying process and the compounding process as short as possible, so as to avoid the viscose body 841 from drying up due to a long time, thereby avoiding the problem of weak bonding.

Please refer to Fig. 3, Fig. 3 is a processing diagram of an embodiment of the diaper core of the present invention. In this embodiment, the processing technology of the diaper core includes the following steps:

The first step, the unwinding and conveying process of the lower wrapping layer 86, is used to unwind the finished roll of the lower wrapping layer 86 and then use the conveying device to move the lower wrapping layer 86 continuously forward in the direction of the first polymer water-absorbing resin spraying device;

In this process, the finished lower wrapping layer 86 is installed on the first installation shaft, and the free end of the lower wrapping layer 86 is driven by the conveying device to move to the first polymer water-absorbing resin spraying device 31 ahead.

In the second step, the polymer water-absorbent resin spraying process, the first polymer water-absorbent resin spraying device 31 is used to spray polymer water-absorbent resin particles to the lower wrapping layer 86 that is continuously moving forward horizontally; wherein, the lower wrapping layer 86 is transported to The position close to the first polymer water-absorbent resin spraying device 31 (located before and after the first polymer water-absorbent resin spraying device 31 is horizontally conveyed until the upper wrapping layer 80 covers the lower wrapping layer 86) is horizontally conveyed by the conveying device, so that After the first polymer water-absorbent resin spraying device 31 sprays the polymer water-absorbent resin particles, the lower wrapping layer 86 will not be transported obliquely to ensure that the polymer water-absorbent resin particles will not fall from the lower wrapping layer 86 or will not fall on the lower wrapping layer 86. Move easily.

In this process, the first polymer water-absorbent resin spraying device 31 has a plurality of first spray nozzles arranged side by side along the width direction of the lower wrapping layer 86 with a third predetermined distance between each other. The width of the nozzle determines the width of the polymer water-absorbing resin (that is, the absorbent core 82) sprayed on the lower wrapping layer 86. The first spray nozzle is vertically facing the upper surface of the lower wrapping layer 86. Multiple groups of polymer water-absorbent resins (that is, the absorbent core 82 ) are sprayed on the wrapping layer 86 with the same width and the same third predetermined distance between each adjacent two groups of polymer water-absorbent resins.

The 3rd step, upper cladding layer 80 composite process, this process includes following sub-processes:

1) The sub-process of unwinding and conveying the upper wrapping layer 80: it is used to unwind the finished roll of the upper wrapping layer 80, and then use the conveying device to move the upper wrapping layer 80 forward in the direction of the composite device; The wrapping layer 80 is installed on the second installation shaft, and the free end of the upper wrapping layer 80 is driven by the conveying device to move continuously to the composite device ahead;

2) The 80 glue spraying process of the upper wrapping layer:

During the process of continuously conveying the upper wrapping layer 80 to the composite device 32 by the conveying device, the glue spraying process of the upper wrapping layer 80 is performed. Wherein, use the first glue spraying device 33 located between the composite device 32 and the first installation shaft to apply glue to the upper wrapping layer 80 of the diaper core and the side to be bonded with the lower wrapping layer 86 (lower surface, hereinafter referred to as the glue to be sprayed). Surface) glue spraying, the first glue spraying device 33 has a plurality of fifth nozzles that are arranged side by side along the width direction of the upper wrapping layer 80 and have a first predetermined distance between them to spray glue on the surface to be glued, so as to form a The viscose body 841 is uniformly distributed in the width direction of the diaper core body. The first predetermined distance matches the width of the absorbent core 82 , so that the absorbent core 82 is just accommodated in the accommodating space 88 of corresponding width between two adjacent viscose bodies 841 . The glue spraying method can adopt the above-mentioned rotary glue spraying, so that each group of viscose bodies 841 is in the shape of a spiral belt, or can use a linear moving glue spraying method, that is, the fifth nozzle does not make a circle motion, and only needs to directly face the upper surface. Glue can be sprayed on the wrapping layer 80 to form the above-mentioned elongated or strip-shaped viscose body 841 .

3) Composite sub-process:

After completing step 2) of the glue spraying process, the conveying device continues to drive the upper wrapping layer 80 sprayed with viscose 841 to move to the composite device 32, so that the upper wrapping layer 80 is compounded on the lower wrapping layer 86. After compounding, each One group of viscose bodies 841 is just located between corresponding two adjacent absorbent cores 82, or each group of absorbent cores 82 is just located in the accommodating space 88 between every adjacent two groups of viscose bodies 841 (See Figure 4 for details).

The fourth step, product cutting process;

The fifth step, product winding.

Both the fourth step and the fifth step adopt the existing product cutting and winding process, so there is no need to repeat them here.

In the embodiment of the present invention, it is only necessary to change the glue spraying process in the production process of diapers, increase the number of nozzles of the glue spraying device, arrange the nozzles side by side along the width direction of the layer to be sprayed, and make the layer to be sprayed continue to move forward. At the same time, the structure of the adhesive layer 84 of the diaper can be changed by making the plurality of nozzles to spray glue in a circular motion. The amount of change is very small, and only the driving mode of the nozzles needs to be changed. This improvement reduces the area of glue spraying and saves the amount of glue used. Under the same amount of glue, more products can be bonded by spraying glue in this way, which saves the production cost of the product; enables urine to penetrate more evenly The absorbent core layer will not penetrate into the absorbent core layer after being concentrated in a certain place, thereby reducing the diffusion performance and absorption speed of the absorbent core layer; 3. Compounding after adopting the above-mentioned glue spraying method, the viscose body 841 and the The absorbent cores 82 are staggered, so that each group of absorbent cores 82 is located in the accommodation space 88 between two adjacent groups of viscose bodies 841, and the width of the viscose bodies 841 is much smaller than that of the absorbent cores 82 The width of the viscose body 841 is only used to isolate every adjacent two groups of absorbent cores 82, thus greatly increasing the area that the absorbent core 82 occupies the core of the diaper, increasing the size of the absorbent core 82 area, reduce the area occupied by the viscose body 841, reduce the amount of glue used, and then ensure that the absorbent core 82 absorbs liquid faster, has better diffusivity, and can bring users a better user experience; The shielding of the upper polymer water-absorbent resin on the upper surface of the layer increases the absorption speed and diffusion performance of the upper polymer water-absorbent resin and the fluffy non-woven fabric, and the dryness of the product is guaranteed. Non-woven fabric is used as the wrapping material, which greatly reduces the thickness of the core and improves the comfort of the product.

Please refer to Fig. 5, which is a schematic structural view of an embodiment of the diaper of the present invention. This embodiment includes a diaper main body 100 and baffles 200 arranged longitudinally on both sides of the diaper main body 100. The diaper main body 100 includes a water-permeable surface layer 110, a diaper core 120 and a water-impermeable bottom layer 130 arranged in sequence from top to bottom. , the diaper core 120 includes an upper wrapping layer, an absorbent core layer, an adhesive layer and a lower wrapping layer, wherein the adhesive layer is located between the upper wrapping layer and the lower wrapping layer, and the adhesive layer includes For the multiple groups of viscose bodies that bond the upper wrapping layer and the lower wrapping layer, the multiple groups of viscose bodies are distributed at intervals along the width direction or length direction of the upper and lower wrapping layers, and each adjacent two viscose bodies An independent accommodating space is formed between them; the absorbent core layer includes a number of corresponding absorbent cores located in the accommodating space. The structure or function of the diaper core 120 is the same or similar to that of the above-mentioned diaper core, and will not be repeated here.

In this embodiment, the diaper main body 100 includes a water-absorbent surface layer 110, a diaper core 120, and a water-impermeable bottom layer 130 arranged sequentially from top to bottom, and each baffle 200 includes a connecting portion 210 and a baffle body. 220 , the inner end of the connecting portion 210 is located between the diaper core 120 and the water-impermeable bottom layer 130 , the outer end is connected to the lower end of the baffle body 220 , and the upper end of the baffle body 220 extends upward. specifically:

The flap body 220 includes an inner surface layer 221 and an outer surface layer 222, the lower end of the inner surface layer 221 is connected to the outer end of the connecting portion 210, and the upper end extends upward, and the outer surface layer 222 overlaps with the inner surface layer 221; The diaper main body 100 also includes an overlapping portion 230 overlapping the impermeable bottom layer 130 , one end of the overlapping portion 230 is connected to the lower end of the outer layer 222 , and the other end is covered on the impermeable bottom layer 130 .

In this embodiment, each blocking piece 200 and the overlapping portion 230 are folded and formed by a non-woven fabric, that is, the connecting portion 210, the blocking piece body 220 and the overlapping portion 230 of the blocking piece 200 are all folded and formed by a non-woven fabric. . Wherein: one end of the non-woven fabric is arranged between the diaper core 120 and the impermeable bottom layer 130 to form the connecting portion 210, and the other end extends upward and outward to form the inner surface layer 221 of the baffle body 220, and One end continues to bend outwards and extends downwards along the inner surface layer 221 and overlaps with the inner surface layer 221 to form the outer surface layer 222. The overlapping portion 230 is formed on the water-permeable bottom layer 130 . In this solution, one end of the non-woven fabric is bonded to the lower surface of the diaper core 120 and the upper surface of the water-impermeable bottom layer 130 by fixing glue, and the other end forms the blocking body 220 and continues to bend to cover the water-impermeable bottom layer 130, so that the inner end of the Velcro is directly sandwiched between the overlapping portion 230 and the water-impermeable bottom layer 130, which facilitates the fixing of the Velcro, and its process is very simple. It can be understood that in other embodiments, the arrangement manner of the flap 200 can also be changed in different ways, and is not limited to the above-mentioned folding manner. For example, in some embodiments, the baffle 200 is directly made of multi-layer non-woven fabric, and it may only include the connecting part 210 and the baffle body 220, and the connecting part 210 is fixed on the diaper core 120 and the impermeable bottom layer 130. in between. It can be understood that, in other embodiments, the connecting portion 210 and the blocking body 220 can be folded, and the overlapping portion 230 can be attached to the impermeable bottom layer 130 on both sides of the blocking body 220 separately.

In this embodiment, the flap body 220 is attached to the water-absorbent surface layer 110 when the diaper is in a folded state (that is, not opened), that is, the two flap bodies 220 are attached to the water-absorbent surface layer 110 in opposite directions. Above the surface layer 110 ; when the diaper is in an open state, the flap body 220 is in a state of standing upward as shown in FIG. 1 .

In order to increase the longitudinal elasticity of the diaper core 120, core elastic ribs 121 are respectively provided on both sides of the diaper core 120, so that the diaper core 120 has longitudinal elasticity and makes the diaper core 120 more followable.

In this embodiment, after the water-absorbent surface layer 110 is covered on the upper surface of the diaper core body 120, its two sides extend along the two sides of the diaper core body 120 to the lower surface of the diaper core body 120, so that the Both ends of the water-absorbent surface layer 110 are disposed on the lower surface of the diaper core 120 , between the diaper core 120 and the water-impermeable bottom layer 130 .

In this embodiment, in order to accelerate the water absorption rate of the diaper core 120 , a flow guide layer 140 is provided between the diaper core 120 and the water-absorbent surface layer 110 . The flow guide layer 140 can be made of non-woven material.

In this embodiment, in order to increase the softness of the water-absorbent surface layer 110 and make it more skin-friendly, a fluffy layer 150 is also pressed on the upper surface of the water-absorbent surface layer 110. The fluffy layer 150 can be made of non-woven fabric through a fluffy process. Made by processing.

The paper diaper of the present invention, because its upper viscose layer and lower viscose layer all adopt the planar spiral belt-shaped glue spraying mode, compared with the mode of full spraying, has the following beneficial effects: 1. Reduce the glue spraying area, save viscose The amount of glue, in the case of the same amount of glue, more products can be bonded by spraying glue in this way, which saves the production cost of the product; 2. The upper glue layer is sprayed more evenly, and the urine can penetrate more evenly into the The absorbent core layer will not be concentrated in a certain place and then penetrate into the absorbent core layer, thereby reducing the diffusion performance and absorption speed of the absorbent core layer; 3. Reduce the blocking of the upper polymer water-absorbent resin located on the upper surface of the absorbent core layer, increase The absorption speed and diffusion performance of the upper polymer water-absorbent resin and the fluffy non-woven fabric ensure the dryness of the product. Non-woven fabric is used as the wrapping material, which greatly reduces the thickness of the core and improves the comfort of the product. To sum up, compared with the existing diapers, the diapers of the present invention are lighter, thinner, softer and lighter-skinned, and have better diffusibility and absorption speed, thereby ensuring the dryness of the product and further preventing infants from being easily irritated due to poor dryness. Skin problems such as rashes and eczema will bring users a better feeling and experience.

The above is only the embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present invention in the same way.

Claims (10)

1. a diaper core body, including upper integument, absorbent core layer, adhesive-layer and lower integument, it is characterised in that: described Adhesive-layer is between upper integument and lower integument, and this adhesive-layer includes for making upper integument mutually bonding with lower integument Many group viscose glue bodies, described many group viscose glue bodies are spaced apart along width or the length direction of upper and lower integument, the most adjacent Independent accommodation space is formed between two viscose glue bodies；Described absorbent core layer includes some being positioned at described accommodation space one to one Interior absorptive core.

2. diaper core body as claimed in claim 1, it is characterised in that: described many group viscose glue bodies are along the width of diaper core body Direction or length direction is evenly spaced is distributed between integument and lower integument, so that upper integument and lower parcel every Bonded by one group of corresponding viscose glue body every a segment distance.

3. diaper core body as claimed in claim 2, it is characterised in that: when described many group viscose glue bodies are along described diaper core body The distribution of length direction uniform intervals time, the width phase of the length of each group of viscose glue body and described upper integument or lower integument Join.

4. diaper core body as claimed in claim 2, it is characterised in that: when described many group viscose glue bodies are along described diaper core body The distribution of width uniform intervals time, the length phase of the length of each group of viscose glue body and described upper integument or lower integument Join.

5. the diaper core body as according to any one of Claims 1-4, it is characterised in that: described viscose glue body is strip.

6. the diaper core body as according to any one of Claims 1-4, it is characterised in that: described viscose glue body helically banding.

7. the diaper core body as according to any one of Claims 1-4, it is characterised in that: described each absorptive core by Some hydroscopic high-molecular resin granules form.

8. diaper core body as claimed in claim 7, it is characterised in that: some macromolecule water uptakes of described each absorptive core Resin particle is by the accommodation space being homogeneously disposed in correspondence.

9. a spray-bonding craft for diaper absorptive core, for utilizing to be painted to diaper absorptive core of the first glue-spraying device The glue surface to be painted of glue-line carries out glue spraying, it is characterised in that: utilize the first conveyer device to make glue-line to be painted to the first glue-spraying device side To persistently moving forward, and during persistently moving forward, control the multiple along glue-line width to be painted of the first glue-spraying device Direction is set up in parallel and has the 5th nozzle of the first preset space length each other and carries out glue spraying to the glue surface to be painted of glue-line to be painted, Thus formed and there are the many groups of viscose glue bodies along the distribution of diaper core body width uniform intervals.

10. a diaper core body processing technology, it is characterised in that include following operation:

The first step, lower integument uncoiling conveying operation: utilize conveyer device to make after lower integument finished product is involved in row uncoiling Lower integument persistently moves forward to the direction of the first hydroscopic high-molecular resin flusher；

Second step, hydroscopic high-molecular resin spray operation: utilize the first hydroscopic high-molecular resin flusher to continue to Before the lower integument that moves horizontally spray hydroscopic high-molecular resin granule；Described first hydroscopic high-molecular resin flusher has Multiple widths along described lower integument are set up in parallel and have each other the first spray nozzle of the 3rd preset space length, institute State the upper surface towards lower integument that the first spray nozzle is vertical；

3rd step, upper integument compound working procedure, this operation includes following sub-operation:

1) upper integument uncoiling carries sub-operation: utilize conveyer device to make upper bag after upper integument finished product is involved in row uncoiling Covering layer persistently moves forward to the direction of set composite；

2) the upper sub-operation of integument glue spraying: during utilizing conveyer device that persistently upper integument is delivered to set composite, enter Integument glue spraying operation on row.Wherein, utilize the first glue-spraying device 33 between set composite and the first installation axle to paper One side glue spraying to be bonded with lower integument on the upper integument of urine pants core body, the first glue-spraying device 33 has multiple along upper parcel Layer width is set up in parallel and has the 5th nozzle of the first preset space length each other to glue surface glue spraying to be painted, to form tool There are the many groups of viscose glue bodies along the distribution of diaper core body width uniform intervals；

3) compound sub-operation: complete the 2nd) step glue spraying operation after, conveyer device continues to drive the upper integument spraying viscose glue body Moving to set composite, make under being compound in of integument on integument, after being combined, each group of viscose glue body is placed exactly in Between two corresponding adjacent absorptive cores；

4th step, product cut operation；

5th step, product rolling.