CN110215350B

CN110215350B - Dry and breathable paper diaper and production process thereof

Info

Publication number: CN110215350B
Application number: CN201910494682.9A
Authority: CN
Inventors: 赵明
Original assignee: Hangzhou Beigao Maternal And Infant Products Co ltd
Current assignee: Hangzhou Beigao Maternal And Infant Products Co ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2021-09-07
Anticipated expiration: 2039-06-06
Also published as: CN110215350A

Abstract

The invention discloses a dry and breathable paper diaper and a production process thereof, wherein the paper diaper comprises a paper diaper body, a composite core layer and a coating structure coated outside the composite core layer; the composite core layer comprises a core body inner layer and a core body wrapping non-woven fabric wrapping the outer part of the core body inner layer; the core inner layer comprises core upper layer breathable cloth, middle layer fluffy fiber net and core lower layer breathable cloth, and a water absorption particle layer is arranged between the upper layer non-woven fabric and the middle layer fluffy fiber net and between the middle layer fluffy fiber net and the core lower layer breathable cloth; the cladding structure comprises an upper non-woven fabric layer, a lower non-woven fabric layer, a breathable waterproof film and a bottom non-woven fabric layer, wherein the lower non-woven fabric layer is bonded with the composite core layer, the lower non-woven fabric layer is bonded with the breathable waterproof film, and the breathable waterproof film is bonded with the bottom non-woven fabric layer. The diaper has the advantages of good water absorption effect, dryness, air permeability, and difficulty in occurrence of red buttocks phenomenon.

Description

Dry and breathable paper diaper and production process thereof

Technical Field

The invention relates to the technical field of paper diapers, in particular to a dry and breathable paper diaper and a production process thereof.

Background

The paper diaper and the pull-up diaper are very important for babies at different ages, and are very popular with parents of babies due to the characteristics of certain water absorption effect and disposability.

The paper diaper and the pull-up diaper are similar in design principle, and adopt the high-molecular water-absorbent resin as a main component, and some traditional paper diapers and pull-up diapers are combined with wood pulp at present to form a water-absorbent core together with the high-molecular water-absorbent resin. The high molecular water-absorbing resin in the water-absorbing core body is a high water-absorbing carrier for storing water, can absorb the water 150 times of its own weight, and has the advantages of no toxicity, no harm, no peculiar smell, no mosquito, no pollution and the like.

Chinese patent with application publication No. CN108542602A and application publication date of 2018, 02/07 discloses a method for manufacturing a baby diaper, which comprises a skin-friendly non-woven fabric, wood pulp, a high-molecular water-absorbent resin, a flow guide layer, a water repellent cloth, a PE film and a magic buckle, and the method comprises the following steps:

and step S1: crushing wood pulp, mixing with high-molecular water-absorbent resin, and molding to obtain a water-absorbent material;

and step S2: the absorbent material is coated by toilet paper, and the formed cotton core is obtained after the processes of compaction and slitting are carried out;

and step S3: pressing a cotton core to form a urethral catheterization groove on the cotton core, wherein the urethral catheterization groove is divided into 4 sections of arc-shaped partial urethral catheterization grooves;

and step S4: unreeling the skin-friendly non-woven fabric and the flow guide layer non-woven fabric simultaneously, and spraying glue to form a composite surface layer;

and step S5: wrapping the outer part of the cotton core by a composite surface layer to form a core body;

and step S6: cutting the water repellent cloth to form a protective enclosure structure, and compounding a layer of skin-friendly non-woven fabric on the protective enclosure structure to form a three-dimensional protective enclosure;

and step S7: cutting the PE film to form a side wing, and compounding the side wing and the three-dimensional enclosure to form a side wing enclosure;

and step S8: preparing a front waist patch and a back waist ring;

and step S9: cutting the PE film to form a PE bottom film, and compounding skin-friendly non-woven fabric on the lower side surface of the PE bottom film to form a fabric bottom film;

and step S10: compounding a fabric bottom film, side wing protection walls, a core body, a front waist patch and a rear ring waist to form a semi-finished baby diaper; and step S11: and magic buckles are respectively and correspondingly arranged at the two ends of the back ring waist and the two ends of the front waist tape to form a finished baby diaper.

In the prior art, although wood pulp is adopted to be matched with the high-molecular water-absorbent resin, the wood pulp is used after the wood pulp is smashed, in the using process, the wood pulp and the high-molecular water-absorbent resin are easily fine particles, the water absorption performance of the baby diaper in the prior art can be improved, but because a baby moves too much, the integrity of the wood pulp and the high-molecular water-absorbent resin is poor, the phenomenon that the water absorption core layer sticks together is difficult to obtain ideal improvement, the air permeability of the baby diaper in the prior art is poor, and the phenomena that the buttocks of the baby are red spots and the like are easily caused.

Disclosure of Invention

Aiming at the defects in the prior art, the first purpose of the invention is to provide a dry and breathable paper diaper which has the advantages of good water absorption effect, dryness and breathability, and difficulty in causing the red buttocks of infants to appear.

The second purpose of the invention is to provide a production process of the dry and breathable paper diaper, which has the advantages of high continuity and aseptic, safe, dry and breathable effects of the prepared paper diaper.

In order to achieve the first object, the invention provides the following technical scheme:

a dry and breathable paper diaper comprises a paper diaper body, a three-dimensional enclosure structure arranged on the paper diaper body, and an elastic structure arranged on the paper diaper body and the three-dimensional enclosure structure; the paper diaper body comprises a composite core layer and a coating structure coated outside the composite core layer;

the composite core layer comprises a core body inner layer and a core body wrapping non-woven fabric wrapping the outer part of the core body inner layer; the core inner layer comprises core upper layer breathable cloth, middle layer fluffy fiber net and core lower layer breathable cloth, and a water absorption particle layer is arranged between the upper layer non-woven fabric and the middle layer fluffy fiber net and between the middle layer fluffy fiber net and the core lower layer breathable cloth;

the wrapping structure comprises an upper layer of non-woven fabric, a lower layer of non-woven fabric, a breathable waterproof film and a bottom layer of non-woven fabric, wherein the upper layer of non-woven fabric, the lower layer of non-woven fabric, the breathable waterproof film and the bottom layer of non-woven fabric are arranged on the upper surface of the paper diaper body;

the water absorption particle layer consists of water absorption particles, and the water absorption particles comprise one of a mixture of acrylic acid type super absorbent resin and powdered sericin and acrylic acid type super absorbent resin;

the upper breathable cloth and the lower breathable cloth of the core body are spunlace non-woven fabrics.

By adopting the technical scheme, in the composite core layer, the non-woven fabric is wrapped to cover the upper breathable cloth, the middle fluffy fiber web, the lower breathable cloth and the water absorption particle layer of the core body, so that the integrity of the core body is improved.

The upper layer non-woven fabric and the lower layer non-woven fabric are non-woven fabrics, and the upper layer breathable cloth and the lower layer breathable cloth of the core body are spunlace non-woven fabrics; upper strata non-woven fabrics, lower floor non-woven fabrics direct contact baby's skin, when liquid, help promoting liquid and permeate to compound sandwich layer from hydrophilicity water thorn non-woven fabrics or silk layer, and then help being absorbed by the grained layer that absorbs water fast, the difficult phenomenon that liquid gathered or the seepage appears, keep the dry and comfortable on panty-shape diapers surface, and the homogeneity of infiltration liquid also obtains improving, help protecting baby's skin dry and comfortable degree, the difficult condition that leads to baby's skin to be covered to go out the red point that appears.

More preferably: bonding layers are arranged between the non-woven fabric and the composite core body on the lower layer and between the composite core body and the breathable waterproof membrane.

More preferably: the bonding layer consists of natural adhesive and powdered sericin, the coverage rate of the natural adhesive in the lower non-woven fabric layer is 20-30%, and the coverage rate of the powdered sericin in the lower non-woven fabric layer is 30-40%; the size of the sericin is 1-2 times of that of the water absorbing particles.

Through adopting above-mentioned technical scheme, in case contact the liquid that contains water, the sericin melts and bonding effect appears, and the sericin melts the back, and most is easily in the clad structure in the composite core body, plays the effect of further fixed composite core body. In the manufacturing process, because comparatively inseparable combination effect has been formed between the layer, in addition the size of natural adhesive and sericin is greater than the size of the granule that absorbs water, partial sericin is adhered on natural adhesive, and some powdered sericin is fixed closely between lower surface layer non-woven fabrics and compound sandwich layer, compound sandwich layer and ventilative waterproof membrane in addition, consequently, the difficult condition that appears the displacement of sericin.

More preferably: the powdered sericin is prepared by the following method:

soaking silk in 60-90 deg.C water for 2-3h, filtering or centrifuging to remove solid and obtain sericin aqueous solution, and freeze drying to obtain powdered sericin.

By adopting the technical scheme, the sericin in the silk can be removed easily through the soaking treatment at a higher temperature, so that the fibroin is left. After silk fibroin is filtered, the sericin protein aqueous solution is freeze-dried to obtain powdery sericin which is cleaner and not easy to be damaged by external microorganisms.

More preferably: the thickness of the middle layer fluffy fiber net is 0.1-0.2 mm.

By adopting the technical scheme, the middle-layer fluffy fiber net is of a fluffy structure, the thickness is moderate, when the water absorption particles absorb and expand, the water absorption particles can enter the fluffy space of the middle-layer fluffy fiber net and serve as the middle-layer fluffy fiber net of the supporting structure, the water absorption particles are not easy to agglomerate and are uniformly dispersed in the pores of the middle-layer fluffy fiber net.

More preferably: the middle-layer fluffy fiber web is prepared from ES fibers by a hot air method, the ES fibers are short fibers, the ES fibers comprise a core layer and a skin layer coated outside the core layer, the skin layer is PE, and the core layer is PP or polyester.

By adopting the technical scheme, the ES fiber has the special structure of the core layer and the skin layer, when the ES fiber is subjected to high-temperature operations such as hot pressing and the like, the skin layer on the ES fiber can be melted into a fluid shape, and the ES fiber is contracted into liquid drops on the surface of the core layer and is gathered at the fiber intersection, so that the surface energy, namely the interface contact angle is improved. At the same time, such an approach also facilitates increasing the overall stability of the middle lofty web.

More preferably: the method comprises the following steps of firstly pretreating the ES fibers before the ES fibers are prepared into a middle-layer fluffy fiber web by a hot air method, wherein the pretreatment comprises the following steps:

spraying 5-8% sericin aqueous solution on ES fiber of long fiber, drying at 30-35 deg.C in sterile environment, and cutting into short fiber with length of 50-80 mm;

the weight part ratio of the sericin aqueous solution to the ES fibers of the long fibers is 1: (2-5).

By adopting the technical scheme, the sericin is attached to the outside of the ES fiber, and the sericin can be remained on the obtained ES fiber when the subsequent high-heat treatment is carried out on the ES fiber. The sericin dissolves in water and has an adhesion effect when encountering liquid, thereby contributing to a better improvement in the integrity of the resulting middle layer bulky web.

More preferably: silk fibroin powder is arranged in the middle-layer fluffy fiber web, and the weight part ratio of the silk fibroin powder to the water-absorbing particles is 1: (130-150).

By adopting the technical scheme, the silk fibroin powder expands after meeting water, but is insoluble in water, and is beneficial to forming a better supporting effect by matching with the middle fluffy fiber net.

More preferably: the quantitative amounts of the upper layer breathable cloth, the lower layer breathable cloth, the upper layer non-woven fabric, the lower layer non-woven fabric and the bottom layer non-woven fabric of the core body are 8-10g/m²The apparent density is 0.05-0.8g/cm³The air permeability is 500-550L/m²/s。

By adopting the technical scheme, the dry and breathable effects of the paper diaper are improved.

In order to achieve the second object, the invention provides the following technical scheme:

a production process of dry and breathable paper diapers comprises the following steps:

in the first step of the method,

preparing a composite core body: uniformly adding silk fibroin powder into the middle-layer fluffy fiber net, respectively covering the upper-layer breathable cloth and the lower-layer breathable cloth of the core body on two sides of the middle-layer fluffy fiber net, uniformly filling water-absorbing particles between the upper-layer breathable cloth and the middle-layer fluffy fiber net and between the lower-layer breathable cloth and the middle-layer fluffy fiber net of the core body to form a water-absorbing particle layer, thereby forming an inner layer of the core body, and wrapping the non-woven fabric wrapped by the core body outside the inner layer of the core body;

gluing the bottom non-woven fabric with one surface of the breathable basement membrane coated with the urine display glue, uniformly coating a natural adhesive on the breathable basement membrane, paving powdery sericin to ensure that the coverage rates of the natural adhesive and the powdery sericin on the lower non-woven fabric are respectively 20-30% and 30-40%, and gluing the composite core body and the breathable basement membrane; gluing the lower non-woven fabric layer with the composite core body in the same way, and hot-pressing the upper non-woven fabric layer and the lower non-woven fabric layer with the salient points;

preparing a three-dimensional enclosure structure and an elastic structure on the paper diaper body and the three-dimensional enclosure structure;

compounding and sterilizing to obtain dry and breathable paper diapers;

the above work is carried out in a sterile environment.

By adopting the technical scheme, the obtained paper diaper is higher in safety, and good in dry and breathable effect.

In conclusion, the invention has the following beneficial effects:

1. according to the invention, the composite core layer and the cladding structure are mutually matched to form the paper diaper body, so that the liquid absorption effect of the paper diaper is greatly improved, the paper diaper has dry and breathable effects, and the red spots are not easily formed by the hip of a baby in a way of covering.

2. Compared with the existing composite core layer formed by mixing water-absorbing materials such as wood pulp, fluff pulp and paper pulp with high-molecular water-absorbing resin, the composite core layer is easier to fix, and the obtained paper diaper (also can be pull-up diaper) has the effect of uniformly absorbing liquid excrement of infants and is not easy to lump.

3. According to the invention, the natural adhesive and the powdered sericin are matched with each other, so that the use amount of the natural adhesive is reduced; and once the composite core body is contacted with liquid containing water, the sericin is dissolved and generates a bonding effect, and most of the sericin is easily coated in a coating structure in the composite core body after the sericin is dissolved, so that the composite core body is further fixed.

4. In the manufacturing process, because comparatively inseparable combination effect has been formed between the layer, in addition the size of natural adhesive and sericin is greater than the size of the granule that absorbs water, partial sericin is adhered on natural adhesive, and some powdered sericin is fixed closely between lower surface layer non-woven fabrics and compound sandwich layer, compound sandwich layer and ventilative waterproof membrane in addition, consequently, the difficult condition that appears the displacement of sericin.

5. The invention adopts the middle layer fluffy fiber net made of ES fiber consisting of the core layer and the skin layer, has better supporting effect in the made paper diaper or the pull-up diaper, can sink into the space in the middle layer fluffy fiber net when the water absorption particles expand after absorbing water due to the fluffy structure, and has better integrity of the middle layer fluffy fiber net structure, so that the water absorption particles after absorbing water are uniformly distributed in the middle layer fluffy fiber net.

Drawings

FIG. 1 is a schematic view of a diaper provided by the present invention;

fig. 2 is a sectional view of a diaper embodying the present invention.

In the figure, 11, the composite core layer; 111. an inner core layer; 1111. an upper layer of breathable cloth; 1112. a middle layer of fluffy fiber net; 1113. the lower layer of the core body is made of breathable cloth; 1114. a water-absorbent particle layer; 112. the core body wraps the non-woven fabric; 121. an upper layer of non-woven fabric; 122. the lower layer of non-woven fabric; 123. a breathable waterproof film; 124. a bottom layer of non-woven fabric; 2. a three-dimensional enclosure structure; 3. an elastic structure; 4. and (7) bonding the layers.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples.

Example 1: a dry and breathable paper diaper, as shown in fig. 1 and 2, comprising a paper diaper body, a three-dimensional enclosure structure 2 arranged on the paper diaper body, and an elastic structure 3 arranged on the paper diaper body and the three-dimensional enclosure structure 2; the diaper body comprises a composite core layer 11 and a coating structure coated outside the composite core layer 11. The composite core layer 11 includes a core inner layer 111 and a core wrapping nonwoven fabric 112 wrapped outside the core inner layer 111.

The core inner layer 111 comprises a core upper layer breathable cloth 1111, a middle layer bulky fiber net 1112 and a core lower layer breathable cloth 1113, and acrylic-type super absorbent resin layers are arranged between the upper layer non-woven fabric and the middle layer bulky fiber net 1112 and between the middle layer bulky fiber net 1112 and the core lower layer breathable cloth 1113. The acrylic super absorbent resin accounts for 20 percent of the total weight of the paper diaper.

The wrapping structure comprises an upper layer of non-woven fabric 121, a lower layer of non-woven fabric 122, a breathable waterproof membrane 123 and a bottom layer of non-woven fabric 124, which are arranged on the upper surface of the diaper body, wherein the lower layer of non-woven fabric 122 is bonded with the composite core layer 11 through an adhesive layer 4, the lower layer of non-woven fabric 122 is bonded with the breathable waterproof membrane 123 through the adhesive layer 4, and the breathable waterproof membrane 123 is bonded with the bottom layer of non-woven fabric 124.

And the paper diaper is prepared by the following steps:

under the aseptic environment, the first step,

the ES fiber comprises a core layer and a skin layer coated outside the core layer, wherein the skin layer is PE, the core layer is PP, and a middle-layer fluffy fiber web 1112 with the thickness of 0.2mm is prepared by adopting a hot air method.

Preparing a composite core body: the composite core body is characterized in that the upper-layer breathable cloth 1111 and the lower-layer breathable cloth 1113 of the core body are respectively covered on two sides of the middle-layer bulky fiber net 1112, then the space between the upper-layer breathable cloth 1111 and the middle-layer bulky fiber net 1112 of the core body and the space between the lower-layer breathable cloth 1113 and the middle-layer bulky fiber net 1112 of the core body are uniformly filled with acrylic-type super absorbent resin to form an acrylic-type super absorbent resin layer, so that the inner layer 111 of the core body is formed, and the outer part of the inner layer 111 of the core body is covered with the non-woven fabric 112 wrapped by the core body.

Gluing the bottom non-woven fabric 124 with one surface of the breathable basement membrane coated with the urine display glue, uniformly coating a natural adhesive on the breathable basement membrane and paving powdery sericin, so that the coverage rate of the natural adhesive in the lower non-woven fabric 122 is 20% and the coverage rate of the powdery sericin in the lower non-woven fabric 122 is 30%, and gluing the composite core body with the breathable basement membrane; and gluing the lower layer of non-woven fabric 122 with the composite core body in the same way, and hot-pressing the upper layer of non-woven fabric 121 and the lower layer of non-woven fabric 122 which form the salient points.

The powdered sericin is prepared by the following method:

A three-dimensional enclosure structure 2 and an elastic structure 3 on the paper diaper body and the three-dimensional enclosure structure 2 are simultaneously prepared in a workshop; and step two, compounding and sterilizing to obtain the dry and breathable paper diaper.

Wherein the particle size of the water-absorbing particles is 0.1 μm; the upper breathable cloth 1111 and the lower breathable cloth 1113 of the core body are spunlace non-woven fabrics; the basis weight of the upper layer breathable cloth 1111, the lower layer breathable cloth 1113, the upper layer non-woven fabric 121, the lower layer non-woven fabric 122 and the bottom layer non-woven fabric 124 of the core body is 8g/m²The apparent density is 0.05g/cm³Air permeability of 550L/m²/s。

Example 2: a dry, breathable diaper differing from example 1 in that, in step one, the pretreatment of the ES fibers: spraying a 5% sericin aqueous solution on the ES fibers of the long fibers, drying at 30 ℃ in a sterile environment, and cutting the ES fibers into short fibers with the length of 50-80mm, wherein the weight part ratio of the sericin aqueous solution to the ES fibers of the long fibers is 1: 2. then, the long fibers were cut into short fibers, and a medium-layer bulky web 1112 having a thickness of 0.1mm was obtained by a hot air method.

Example 3: a dry, breathable diaper, which differs from example 1 in that in step one, the concentration of the sericin aqueous solution is 6% and the drying temperature is 33 ℃ during the pretreatment of the ES fibers. And the weight part ratio of the sericin aqueous solution to the ES fiber of the long fiber is 1: 3. the thickness of the middle lofty web 1112 was 0.2 mm.

Example 4: a dry and breathable diaper, which is different from the diaper of example 1 in that in the step one, the concentration of the sericin aqueous solution is 8% and the drying temperature is 30 ℃ during the pretreatment of the ES fiber. And the weight part ratio of the sericin aqueous solution to the ES fiber of the long fiber is 1: 5. the thickness of the middle lofty web 1112 was 0.2 mm.

Example 5: a dry and breathable paper diaper is different from that of embodiment 1 in that silk fibroin powder is uniformly added into a middle-layer fluffy fiber net 1112 when a composite core body is prepared, an upper-layer breathable cloth 1111 and a lower-layer breathable cloth 1113 of the core body are respectively covered on two sides of the middle-layer fluffy fiber net 1112, acrylic-type super absorbent resin is uniformly filled between the upper-layer breathable cloth 1111 and the middle-layer fluffy fiber net 1112 of the core body and between the lower-layer breathable cloth 1113 and the middle-layer fluffy fiber net 1112 of the core body to form an acrylic-type super absorbent resin layer, so that a core body inner layer 111 is formed, and the core body wrapping non-woven fabric 112 is wrapped outside the core body inner layer 111. Wherein the weight part ratio of the silk fibroin powder to the acrylic acid type super absorbent resin is 1: 130.

example 6: a dry and breathable paper diaper, which is different from the paper diaper in example 5 in that the weight part ratio of the silk fibroin powder to the acrylic acid type super absorbent resin is 1: 140.

example 7: a dry and breathable paper diaper, which is different from the paper diaper in example 5 in that the weight part ratio of the silk fibroin powder to the acrylic acid type super absorbent resin is 1: 150.

example 8: a dry and air-permeable diaper is different from that of example 1 in that the basis weight of the upper layer air-permeable cloth 1111, the lower layer air-permeable cloth 1113, the upper layer non-woven fabric 121, the lower layer non-woven fabric 122 and the bottom layer non-woven fabric 124 of the core body is 9 g/m²Apparent density of 0.06g/cm³Air permeability of 530L/m²/s。

Example 9: a dry and air-permeable diaper is different from that of example 1 in that the basis weight of the upper layer air-permeable cloth 1111, the lower layer air-permeable cloth 1113, the upper layer non-woven fabric 121, the lower layer non-woven fabric 122 and the bottom layer non-woven fabric 124 of the core body is 10g/m²Apparent density of 0.8g/cm³Air permeability of 500L/m²/s。

Example 10: a dry, breathable diaper differing from example 1 in that the coverage of the lower layer nonwoven fabric 122 with natural adhesive was 25% and the coverage of the lower layer nonwoven fabric 122 with powdered sericin was 35%, respectively.

Example 11: a dry, breathable diaper differing from example 1 in that the coverage of the lower layer nonwoven fabric 122 with a natural adhesive was 30% and the coverage of the lower layer nonwoven fabric 122 with a powdered sericin was 40%, respectively.

Example 12: a dry, breathable diaper, differing from example 1 in that silk is soaked in water at 60 ℃ for 3h, then solids are removed by filtration or centrifugation and an aqueous solution of sericin is obtained, which is then freeze-dried to obtain powdered sericin.

Example 13: a dry, breathable diaper, differing from example 1 in that silk is soaked in water at 90 ℃ for 2h, then solids are removed by filtration or centrifugation and an aqueous solution of sericin is obtained, which is then freeze-dried to obtain powdered sericin.

Example 14: a dry and breathable diaper which is different from the diaper in example 1 in that the water-absorbing particles are prepared from the following components in parts by weight: 1 of the mixture of the acrylic acid type super absorbent resin and the powdered sericin. The water absorption particles account for 15 percent of the total weight of the paper diaper.

Example 15: a dry and breathable diaper which is different from the diaper in example 1 in that the water-absorbing particles are 5 parts by weight: 1 of the mixture of the acrylic acid type super absorbent resin and the powdered sericin. The water absorption particles account for 30 percent of the total weight of the paper diaper.

Comparative example 1: the paper diaper is different from the paper diaper in example 1 in that the paper diaper is prepared by a preparation method of a baby paper diaper disclosed in Chinese patent with application publication number CN108542602A and application publication date of 2018, 02 and 07, and comprises the following steps:

and step S8: preparing a front waist patch and a back waist ring;

Comparative example 2: a diaper differing from example 1 in that no intermediate bulky web was used.

Comparative example 3: a diaper differing from example 1 in that a basis weight of 8g/m was used²The wood pulp fiber layer replaces the middle fluffy fiber net.

Test one: water absorption Performance evaluation test

Test samples: examples 1 to 15 and comparative examples 1 to 3 were used as test samples.

The test method comprises the following steps:

1. pure water is adopted for testing: the diapers in example 1 were laid flat and 600ml of purified water was poured over all over example 1 in 3 s; examples 2 to 15 and comparative examples 1 to 3 were tested in the same manner, and after 10 seconds, the same type of paper towel cut into a circular shape having a diameter of 5cm was used, and the surface of the test sample was pressed with a uniform pressure of 10N, and it was observed whether or not the paper towel was wetted, and recorded and analyzed.

2. The test was carried out using physiological saline: the test is carried out by adopting 0.9 percent normal saline, and the using amount is 500 ml; the test samples were assembled separately, 500ml of physiological saline was poured into the same place in 5 portions for 3 seconds each time, and after the last pouring, the surface of the test sample was observed for water absorption, recorded and analyzed.

3. The test was carried out with simulated urine: firstly, preparing simulated urine, namely taking 9.5kg of water, adding 0.18kg of urea and 0.1kg of inorganic salt, and uniformly stirring to obtain the simulated urine. In the test process, the test samples are respectively assembled, 200ml of simulated urine is taken and is completely poured into the middle part of the test sample within 3s, and the water absorption condition of the test sample is observed after 10s and is recorded and analyzed.

And (3) test results: the results of the three modes of testing are shown in table 1.

TABLE 1 test results of three modes

As can be seen from Table 1, the three tests of examples 1-15 all achieve better absorption effect, and the sample surface is kept dry, so that the red spot covered by the buttocks of the baby is not easy to occur.

In the comparative example 1, since the wood pulp powder was doped, the overall water absorption performance was not uniformly improved, which resulted in a very significant leakage phenomenon in the first experiment. In the second experiment, although the sample was poured 5 times, the leakage occurred during the second pouring, and the leakage occurred very significantly during the third experiment, indicating that the sample had a poorer absorption effect on an aqueous solution having a certain concentration.

In comparative example 2, since the middle bulky web was not used, the absorbency of the water absorbent resin was deteriorated, and the swelling function of the water absorbent resin was limited, it was difficult to achieve a desired water absorbing effect.

In comparative example 3, although an equal amount of the wood pulp fiber layer was used instead of the middle bulky web, the sample still hardly withstood 600ml of purified water, 500ml of physiological saline and 200ml of simulated urine, indicating that the substitution of the wood pulp fiber layer did not give a sufficiently large expansion space to the water absorbent resin, limiting the water absorbing effect of the water absorbent resin.

And (2) test II: air permeability test

The test method comprises the following steps: selecting 18 vacuum cups with the specification of 250ml and filled with 200ml of boiled water, respectively placing the vacuum cups of the examples 1-15 and the comparative examples 1-3 at the cup mouths, compacting the cup mouths by the test samples, observing the condition of hot air on the test samples, recording and analyzing.

And (3) test results: the air permeability of examples 1 to 15 and comparative examples 1 to 3 is shown in Table 2.

TABLE 2 air permeability of examples 1-15 and comparative examples 1-3

Test sample	Condition of ventilation
		Example 1	The hot air emitted is much
Example 2	The hot air is very much
		Example 3	The hot air is very much
Example 4	The hot air is very much
		Example 5	The hot air is very much
Example 6	The hot air is very much
		Example 7	The hot air is very much
Example 8	The hot air is very much
		Example 9	The hot air is very much
Example 10	The hot air is very much
		Example 11	The hot air is very much
Example 12	The hot air is very much
		Example 13	The hot air is very much
Example 14	The hot air is very much
		Example 15	The hot air is very much
Comparative example 1	Not too much hot air is emitted
		Comparative example 2	Less hot gas is emitted
Comparative example 3	Less hot gas is emitted

As can be seen from Table 2, examples 1 to 15 had excellent air permeation effects and a certain thickening phenomenon was observed in one turn (range larger than the cup mouth) of each sample aligned with the cup mouth, indicating that a part of the moisture in the hot gas was absorbed by the test sample and the water-absorbent resin was swollen. Although the water-absorbent resin is expanded, the good ventilation effect can be achieved, and the baby is not easy to cover red spots and the like in the using process.

In comparative examples 1 to 3, the intermediate bulky fiber web was replaced to some extent, but the air permeability of the test sample could not be solved, and the baby could easily cover the red spot or prickly heat when using the baby.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A dry and breathable paper diaper is characterized by comprising a paper diaper body, a three-dimensional enclosure structure (2) arranged on the paper diaper body, and an elastic structure (3) arranged on the paper diaper body and the three-dimensional enclosure structure (2); the paper diaper body comprises a composite core layer (11) and a coating structure coated outside the composite core layer (11);

the composite core layer (11) comprises a core inner layer (111) and a core wrapping non-woven fabric (112) wrapping the outside of the core inner layer (111); the inner core layer (111) comprises an upper core layer breathable cloth (1111), a middle layer fluffy fiber net (1112) and a lower core layer breathable cloth (1113), and a water-absorbing particle layer (1114) is arranged between the upper core layer breathable cloth (1111) and the middle layer fluffy fiber net (1112) and between the middle layer fluffy fiber net (1112) and the lower core layer breathable cloth (1113);

the wrapping structure comprises an upper layer of non-woven fabric (121), a lower layer of non-woven fabric (122), a breathable waterproof membrane (123) and a bottom layer of non-woven fabric (124), wherein the upper layer of non-woven fabric (121), the lower layer of non-woven fabric (122), the breathable waterproof membrane (123) and the bottom layer of non-woven fabric (124) are arranged on the upper surface of the diaper body, the lower layer of non-woven fabric (122) is bonded with the composite core layer (11), the lower layer of non-woven fabric (122) is bonded with the breathable waterproof membrane (123), and the breathable waterproof membrane (123) and the bottom layer of non-woven fabric (124) are bonded;

the water absorption particle layer (1114) is composed of water absorption particles, and the water absorption particles comprise one of a mixture of acrylic acid type super absorbent resin and powdered sericin and acrylic acid type super absorbent resin;

the upper breathable cloth (1111) and the lower breathable cloth (1113) of the core body are spunlace non-woven fabrics;

bonding layers (4) are arranged between the lower non-woven fabric (122) and the composite core body and between the composite core body and the breathable waterproof membrane (123);

the bonding layer (4) is composed of natural adhesive and powdered sericin, the coverage rate of the natural adhesive in the lower non-woven fabric (122) is 20-30%, and the coverage rate of the powdered sericin in the lower non-woven fabric (122) is 30-40%;

the size of the sericin is 1-2 times of that of the water absorbing particles.

2. The dry, breathable diaper according to claim 1, characterized in that said powdered sericin is obtained by a method comprising:

3. A dry, breathable pant diaper according to claim 1, wherein the thickness of the middle lofty web (1112) is 0.1-0.2 mm.

4. The dry and breathable diaper according to claim 1, wherein the middle bulky web (1112) is made of ES fibers by a hot air method, the ES fibers are staple fibers, the ES fibers comprise a core layer and a skin layer coated outside the core layer, the skin layer is PE, and the core layer is PP or polyester.

5. The dry, breathable diaper according to claim 4, characterized in that said ES fibers are pretreated before being subjected to the hot air process for forming a middle bulky web (1112), said pretreatment comprising the following steps:

6. The dry and breathable paper diaper according to claim 1, wherein silk fibroin powder is arranged in the middle layer fluffy fiber net (1112), and the weight part ratio of the silk fibroin powder to the water absorption particles is 1: (130-150).

7. The dry and air-permeable paper diaper as claimed in claim 1, wherein the basis weight of the upper layer breathable cloth (1111) of the core, the lower layer breathable cloth (1113) of the core, the upper layer non-woven fabric (121), the lower layer non-woven fabric (122) and the bottom layer non-woven fabric (124) is 8-10g/m 2, the apparent density is 0.05-0.8g/cm 3, and the air permeability is 500-550L/m 2/s.

8. A process for the production of a dry, breathable pant diaper according to any of claims 1-7, comprising the steps of:

step one, preparing a composite core body: evenly adding fibroin powder into the middle-layer fluffy fiber net (1112), respectively covering the upper-layer breathable cloth (1111) and the lower-layer breathable cloth (1113) of the core body on two sides of the middle-layer fluffy fiber net (1112), evenly filling water-absorbing particles between the upper-layer breathable cloth (1111) and the middle-layer fluffy fiber net (1112) of the core body and between the lower-layer breathable cloth (1113) and the middle-layer fluffy fiber net (1112) of the core body to form a water-absorbing particle layer (1114), thereby forming an inner core body layer (111), and covering the outer part of the inner core body layer (111) with a core body to wrap the non-woven fabric (112);

gluing a bottom layer of non-woven fabric (124) with one surface of the breathable basement membrane coated with the urine-developing glue, uniformly coating a natural adhesive on the breathable basement membrane and paving powdery sericin, so that the coverage rate of the natural adhesive on the lower layer of non-woven fabric (122) is 20-30%, the coverage rate of the powdery sericin on the lower layer of non-woven fabric (122) is 30-40%, and gluing the composite core body with the breathable basement membrane; gluing the lower layer of non-woven fabric (122) with the composite core body in the same way, and hot-pressing the upper layer of non-woven fabric (121) and the lower layer of non-woven fabric (122) which form the salient points;

preparing a three-dimensional enclosure structure (2) and an elastic structure (3) on the paper diaper body and the three-dimensional enclosure structure (2);

compounding and sterilizing to obtain dry and breathable paper diapers;

the above work is carried out in a sterile environment.