Ultra-thin core diaper and production method thereof

Abstract

The present invention provides an ultra-thin core diaper and a production method thereof, belonging to the technical field of diapers. The ultra-thin core diaper comprises a base film, a core, a guide layer and a surface layer, wherein the base film comprises a front waist circumference and a rear waist circumference, and also comprises a fixing layer. Through the arrangement of a drawstring, the weight of the diaper will increase after the diaper absorbs urine, and the base film will bulge downward and deform under the action of gravity. During this process, the outer side of the base film will become an arc, which can pull two drawstrings to move inside corresponding accommodating cavities, further improving the tension of the elastic band on the top of the adjustment layer, so that the waist circumference of the diaper can fit more closely to the body of the baby, avoiding the phenomenon of sinking due to the diaper being too heavy, preventing a large gap between the diaper and the baby's crotch, and avoiding the side leakage of the baby's urine.

Description

Technical Field

[0001] The invention belongs to the technical field of diapers, and in particular relates to an ultra-thin core diaper and a production method thereof. Background Art

[0002] Diapers are a common daily necessity, which is a general term for diapers, diapers, and pull-up pants. The main purpose of diapers is to keep dry and prevent urine from getting wet. They are usually used for infants and incontinent adults. They can quickly absorb urine and keep the skin dry, reducing the occurrence of diaper rash.

[0003] A Chinese patent with application number CN202410316003.X discloses a comfortable, leak-proof diaper, which relates to the technical field of diapers and includes an elastic front surround device, an elastic rear surround device, a central core device, a front traction device and a rear traction device. The central core device is installed on the elastic front surround device through the front traction device, and the central core device is installed on the elastic rear surround device through the rear traction device. The elastic front surround device and the elastic rear surround device are bonded to each other through Velcro. The side of the central core device close to the elastic front surround device absorbs water and squeezes the front traction device, thereby causing the front traction device to pull the central core device to move toward the elastic front surround device. The side of the central core device close to the elastic rear surround device absorbs water and squeezes the rear traction device, thereby causing the rear traction device to pull the central core device to move toward the elastic rear surround device, thereby changing the area for absorbing urine and making the urine distribution more even.

[0004] This invention uses a traction device to pull the central core device toward the elastic rear surround device. Although it can change the area where urine is absorbed and make the urine distribution more even, if the baby urinates frequently, the weight of the diaper will increase and it will fall. This may cause the diaper to lose close contact with the baby's crotch, leaving a large gap, which will cause the baby's urine to leak sideways.

[0005] Therefore, in order to solve the above problems, it is necessary to provide an ultra-thin core diaper and a production method thereof. Summary of the invention

[0006] The purpose of the present invention is to provide an ultra-thin core diaper, aiming to solve the problem in the prior art that when babies urinate and defecate frequently, the weight of the diaper becomes heavier, resulting in falling and causing leakage of the baby's urine and feces.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An ultra-thin core diaper, comprising a base film, a core, a guide layer and a surface layer, wherein the base film comprises a front waistline and a rear waistline, and further comprising:

[0009] A fixing layer, the fixing layer is arranged between the bottom film and the core body, the fixing layer comprises a first air storage part fixedly connected to the bottom film, the two sides of the first air storage part are fixedly connected to the second air storage part fixedly connected to the bottom film, and the first air storage part is squeezed to make the gas inside the first air storage part enter the inside of the two second air storage parts, so that the two second air storage parts can swell;

[0010] The fixing layer also includes an adjusting layer fixedly connected to the base film, the adjusting layer is arranged at the front waistline of the base film and is connected to the first air storage part, two symmetrically arranged elastic bands are arranged on the top of the adjusting layer, and two accommodating cavities are opened inside the adjusting layer.

[0011] Preferably, the two accommodating cavities correspond one-to-one to the two elastic bands, a third air storage portion is provided inside the two accommodating cavities, the two third air storage portions correspond one-to-one to the two second air storage portions, and the third air storage portions on the same side are connected to the second air storage portions.

[0012] Preferably, the ends of the two elastic bands that are close to each other are fixedly connected with drawstrings, the other ends of the two drawstrings pass through the adjustment layer and the bottom film, and the two drawstrings correspond one-to-one to the two accommodating cavities. The two drawstrings can move inside the corresponding accommodating cavities, and the ends of the two drawstrings that are away from the elastic bands are connected to the outer side of the rear waistline of the bottom film.

[0013] Preferably, when the diaper absorbs more urine, the bottom film can convexly deform in a direction away from the core body, drive the two drawstrings to move inside the corresponding accommodating cavities, and pull the two elastic bands to move towards each other.

[0014] Preferably, when the gas inside the two third gas storage parts increases, the two third gas storage parts can expand inside the corresponding accommodating chamber, squeeze the two pull ropes to move towards each other inside the corresponding accommodating chamber, and tighten the two ends of the two pull ropes.

[0015] Preferably, the two second air storage parts are both fixedly connected with a side leakage prevention edge, and when the two second air storage parts swell, the two side leakage prevention edges can be driven to swell synchronously.

[0016] Preferably, each of the side leakage prevention edges is connected to a group of Velcro strips on the outer side close to the front waistline and the rear waistline.

[0017] Preferably, after the diaper absorbs urine, the core can expand between the bottom film and the surface layer, and can squeeze the gas inside the first air storage part.

[0018] A method for producing an ultra-thin core diaper, comprising the following steps:

[0019] S1: sequentially preparing a liquid-permeable surface layer, a guide layer, a core, a fixing layer and a bottom film;

[0020] S2: Lay and bond the base film, the fixing layer, the core, the guide layer and the surface layer in sequence from bottom to top;

[0021] S3: preparing a side leakage prevention edge and bonding it to the second air storage part of the fixed layer;

[0022] S4: Attach the Velcro to the side leakage prevention edges to form a single diaper.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The drawstrings of the present invention increase the weight of the diaper after the diaper absorbs urine, and the bottom film bulges and deforms downward under the action of gravity. During this process, the outer side of the bottom film becomes an arc, which can pull the two drawstrings to move inside the corresponding accommodating cavities, and can make the two elastic bands move toward each other, further improving the tension of the elastic bands on the top of the adjustment layer, so that the waist of the diaper can fit more closely to the baby's body, avoiding the diaper from sinking due to being too heavy, preventing a large gap between the diaper and the baby's crotch, and avoiding the baby's urine from leaking sideways.

[0025] The present invention provides the first air storage part and the third air storage part. When the diaper absorbs urine, the core can expand between the bottom film and the surface layer, squeeze the gas inside the first air storage part, and allow the gas inside the first air storage part to enter the third air storage part, which will first cause the two third air storage parts to expand inside the corresponding accommodating chambers, and can tighten the two ends of the two drawstrings. On the one hand, it can speed up the tension adjustment of the elastic band at the top of the adjusting layer, and can also improve the tension degree of the elastic band at the top of the adjusting layer. On the other hand, the deformation of the bottom film can be supported by the drawstrings, thereby improving the load-bearing capacity of the diaper. Subsequently, the third air storage part is restricted by the inner wall of the accommodating chamber and no longer expands. The gas inside the first air storage part can cause the two second air storage parts to bulge, so that the anti-side leakage edge can be in close contact with the baby's crotch, and side leakage during urination can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the Velcro of the present invention;

[0029] Figure 3 This is a structural distribution diagram of the fixed layer of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the first gas storage part of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the drawstring and the elastic band of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the draw cord and the bottom film of the present invention;

[0033] Figure 7 It is a schematic structural diagram of the third gas storage unit of the present invention.

[0034] In the figure: 1. base film; 2. core body; 21. front waistline; 22. back waistline; 3. guide layer; 4. surface layer; 5. fixing layer; 51. first air storage unit; 52. second air storage unit; 53. adjustment layer; 54. elastic band; 55. accommodating cavity; 56. third air storage unit; 57. drawstring; 6. anti-side leakage edge; 61. Velcro. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1

[0037] When using diapers, if the baby urinates frequently, the core will absorb more liquid, which will cause the diaper to become heavier and fall down, resulting in the diaper being unable to contact the baby's crotch and leaving a gap, which will cause the baby's urine to leak sideways.

[0038] See also Figures 1 to 4 and Figure 7 The present invention provides the following technical solution: an ultra-thin core diaper, comprising a base film 1, a core 2, a guide layer 3 and a surface layer 4, the base film 1 comprising a front waist circumference 21 and a rear waist circumference 22, and further comprising:

[0039] The fixed layer 5 is arranged between the base film 1 and the core 2. The fixed layer 5 includes a first air storage portion 51 fixedly connected to the base film 1. Both sides of the first air storage portion 51 are fixedly connected to second air storage portions 52 fixedly connected to the base film 1. Squeezing the first air storage portion 51 can make the gas inside the first air storage portion 51 enter the inside of the two second air storage portions 52, which can make the two second air storage portions 52 bulge.

[0040] The fixing layer 5 also includes an adjusting layer 53 fixedly connected to the base film 1. The adjusting layer 53 is arranged at the front waistline 21 of the base film 1 and is connected to the first air storage portion 51. Two symmetrically arranged elastic bands 54 are arranged on the top of the adjusting layer 53, and two accommodating cavities 55 are opened inside the adjusting layer 53.

[0041] like Figure 1 As shown, an elastic band 54 is also provided at the rear waist 22 of the base film 1. The elastic band 54 on the top of the adjustment layer 53 and the elastic band 54 at the rear waist 22 of the base film 1 are both located between the adjustment layer 53 and the core 2, and are used to adjust the tightness of the diaper after wearing. This is the prior art and will not be described in detail.

[0042] like Figure 5 As shown, the ends of the two elastic bands 54 that are close to each other are fixedly connected with drawstrings 57, and the other ends of the two drawstrings 57 pass through the adjustment layer 53 and the bottom film 1. The two drawstrings 57 correspond one-to-one to the two accommodating cavities 55. The two drawstrings 57 can move inside the corresponding accommodating cavities 55, and the ends of the two drawstrings 57 that are away from the elastic bands 54 are connected to the outer side of the rear waistline 22 of the bottom film 1.

[0043] When the weight of urine absorbed by the diaper increases, the bottom film 1 can convexly deform in the direction away from the core 2, drive the two drawstrings 57 to move inside the corresponding accommodating cavity 55, pull the two elastic bands 54 to move towards each other, and tighten the two elastic bands 54.

[0044] Each side leakage prevention edge 6 is connected with a group of Velcro 61 on the outside near the front waistline 21 and the back waistline 22. The two groups of Velcro 61 are bonded to each other to realize the wearing of the diaper. This is the existing technology and will not be described in detail.

[0045] In actual use, due to the adhesion of the Velcro 61 and the tension of the elastic band 54, the waistline of the diaper can be in contact with the baby's waist, forming an elastic bond and wrapping around the baby's body. After the diaper absorbs urine, the weight of the diaper will increase, and the bottom film 1 will bulge downward and deform under the action of gravity. During this process, the outer side of the bottom film 1 will become an arc, which can pull the two drawstrings 57 to move inside the corresponding accommodating cavity 55, and pull the two elastic bands 54 closer to each other, further increasing the tension of the elastic band 54 on the top of the adjustment layer 53, which can make the waistline of the diaper fit more closely to the baby's body, avoid the diaper being too heavy and sinking, prevent the diaper from having a large gap with the baby's crotch, and avoid the baby's urine leakage.

[0046] Embodiment 2

[0047] Based on the above embodiment, although the tension of the elastic band can be adjusted by pulling the rope to prevent the diaper from sinking due to being too heavy, the diaper bulges outward during this process, and there is still a deformation gap between the diaper and the baby's crotch, which cannot completely prevent urine from splashing out from the side.

[0048] See also Figures 4 to 7 The two accommodating cavities 55 correspond one-to-one to the two elastic bands 54 , and a third air storage portion 56 is provided inside the two accommodating cavities 55 . The two third air storage portions 56 correspond one-to-one to the two second air storage portions 52 , and the third air storage portions 56 on the same side are connected to the second air storage portions 52 .

[0049] When the gas inside the two third gas storage parts 56 increases, the two third gas storage parts 56 can expand inside the corresponding accommodating chamber 55, and can squeeze the two pull ropes 57 to move towards each other inside the corresponding accommodating chamber 55, and can tighten the two ends of the two pull ropes 57;

[0050] On the one hand, it can speed up the tension adjustment of the elastic band 54 on the top of the adjustment layer 53 and improve the tension degree of the elastic band 54 on the top of the adjustment layer 53. On the other hand, it can also support the deformation of the bottom film 1 through the pull rope 57, thereby increasing the load-bearing capacity of the diaper and avoiding excessive sinking.

[0051] The two second air storage parts 52 are fixedly connected with the side leakage prevention edges 6, and the two side leakage prevention edges 6 are symmetrically arranged. When the two second air storage parts 52 swell, the two side leakage prevention edges 6 can be driven to swell synchronously.

[0052] When the two second air storage parts 52 are not bulged, the side leakage prevention edge 6 is not in close contact with the baby's crotch, and a small gap will exist between the diaper and the baby's crotch for ventilation and heat dissipation. When the two second air storage parts 52 are bulged, the side leakage prevention edge 6 is bulged synchronously and can be in close contact with the baby's crotch, thus preventing urine from splashing out from the sides.

[0053] After the diaper absorbs urine, the core 2 can expand between the bottom film 1 and the surface layer 4 to squeeze the gas inside the first air storage part 51 . During this process, the expanded core 2 does not come into contact with the second air storage part 52 .

[0054] The main reason for the expansion of the diaper core 2 is that the super absorbent resin in the absorbent core expands after absorbing water, which is a prior art and will not be described in detail.

[0055] In actual use, after the diaper absorbs urine, the core 2 can expand between the bottom film 1 and the surface layer 4, which can squeeze the gas inside the first air storage part 51, and can make the gas inside the first air storage part 51 enter the inside of the two second air storage parts 52, and enter the inside of the third air storage part 56, which will first make the two third air storage parts 56 expand inside the corresponding accommodating chambers 55, and can squeeze the two drawstrings 57 to move towards each other inside the corresponding accommodating chambers 55, and can tighten the two ends of the two drawstrings 57, which can speed up the top of the adjustment layer 53. The tension adjustment of the elastic band 54 can also increase the tension of the elastic band 54 on the top of the adjustment layer 53. On the other hand, the deformation of the bottom film 1 can be supported by the pull rope 57 to increase the load-bearing capacity of the diaper. Then, the third air storage part 56 is restricted by the inner wall of the accommodating cavity 55 and no longer expands. The gas inside the first air storage part 51 can make the two second air storage parts 52 bulge. When the two second air storage parts 52 bulge, they can drive the two anti-side leakage edges 6 to bulge synchronously. The bulged anti-side leakage edges 6 can be in close contact with the baby's crotch to prevent urine from splashing out from the side.

[0056] Embodiment 3

[0057] A method for producing an ultra-thin core diaper, comprising the following steps:

[0058] S1: sequentially preparing a liquid-permeable surface layer 4, a guide layer 3, a core 2, a fixing layer 5 and a base film 1;

[0059] S2: stacking and bonding the base film 1, the fixing layer 5, the core 2, the guide layer 3 and the surface layer 4 in sequence from bottom to top;

[0060] S3: preparing the side leakage prevention edge 6 and bonding it to the second air storage portion 52 of the fixing layer 5;

[0061] S4: Glue the Velcro 61 to the side leakage prevention edge 6 to form a single diaper.

[0062] The fixing layer 5 is arranged between the base film 1 and the core 2 by bonding. The preparation technology and bonding method of the surface layer 4, the guide layer 3, the core 2, the base film 1 and the Velcro 61 are all existing technical means and will not be repeated.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultra-thin core diaper, comprising a base film (1), a core (2), a guide layer (3) and a surface layer (4), wherein the base film (1) comprises a front waistline (21) and a rear waistline (22), and characterized in that: Also includes: a fixed layer (5), the fixed layer (5) being arranged between the base film (1) and the core (2), the fixed layer (5) comprising a first air storage portion (51) fixedly connected to the base film (1), the first air storage portion (51) being fixedly connected to two second air storage portions (52) fixedly connected to the base film (1) on both sides thereof, and the first air storage portion (51) being squeezed so that the gas inside the first air storage portion (51) can enter the insides of the two second air storage portions (52), thereby causing the two second air storage portions (52) to swell; The fixing layer (5) further comprises an adjusting layer (53) fixedly connected to the base film (1); the adjusting layer (53) is arranged at the front waistline (21) of the base film (1) and is connected to the first air storage portion (51); two symmetrically arranged elastic bands (54) are arranged on the top of the adjusting layer (53); and two accommodating cavities (55) are provided inside the adjusting layer (53); The two accommodating cavities (55) correspond to the two elastic bands (54) in one-to-one relationship, a third air storage portion (56) is provided inside the two accommodating cavities (55), the two third air storage portions (56) correspond to the two second air storage portions (52) in one-to-one relationship, and the third air storage portions (56) and the second air storage portions (52) on the same side are in communication with each other; The ends of the two elastic bands (54) close to each other are fixedly connected to a drawstring (57), the other ends of the two drawstrings (57) penetrate the adjustment layer (53) and the bottom film (1), and the two drawstrings (57) correspond to the two accommodating cavities (55) one by one. The two drawstrings (57) can move inside the corresponding accommodating cavities (55), and the ends of the two drawstrings (57) away from the elastic bands (54) are connected to the outer side of the back waistline (22) of the bottom film (1); When the weight of urine absorbed by the diaper increases, the bottom film (1) can be deformed to convex in a direction away from the core (2), and can drive the two drawstrings (57) to move inside the corresponding accommodating cavity (55), and can pull the two elastic bands (54) to move in a direction toward each other; When the gas inside the two third gas storage parts (56) increases, the two third gas storage parts (56) can expand inside the corresponding accommodating chamber (55), and can squeeze the two pull ropes (57) to move towards each other inside the corresponding accommodating chamber (55), and can tighten the two ends of the two pull ropes (57); The two second air storage parts (52) are both fixedly connected with a side leakage prevention edge (6), and when the two second air storage parts (52) swell, they can drive the two side leakage prevention edges (6) to swell synchronously.

2. The ultra-thin core diaper according to claim 1, characterized in that: Each of the side leakage prevention edges (6) is connected to a group of Velcro strips (61) on the outer side close to the front waistline (21) and the rear waistline (22).

3. The ultra-thin core diaper according to claim 2, characterized in that: When the diaper absorbs urine, the core (2) can expand between the bottom film (1) and the surface layer (4), and can squeeze the gas inside the first gas storage portion (51).

4. A method for producing an ultra-thin core diaper, used for producing the ultra-thin core diaper according to claim 3, characterized in that: The following steps are involved: S1: preparing a liquid-permeable surface layer (4), a guide layer (3), a core (2), a fixing layer (5) and a base film (1) in sequence; S2: stacking and bonding the base film (1), the fixing layer (5), the core (2), the guide layer (3) and the surface layer (4) in sequence from bottom to top; S3: preparing a side leakage prevention edge (6) and bonding it to the second air storage portion (52) of the fixing layer (5); S4: Adhere the Velcro (61) to the anti-leakage edge (6) to form a single diaper.

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