CN205359816U - Once only absorb absorption core material of articles for use - Google Patents

Abstract

The utility model relates to an once only absorb articles for use technical field, in particular to once only absorb absorption core material of articles for use, absorption core material for multilayer combined material, including first overburden, hot -melt adhesive layer, super absorbent polymer resin layer, high fluffy non -woven fabrics layer, super absorbent polymer resin layer, hot -melt adhesive layer, second overburden. Characterized in that, hot -melt adhesive layer be provided with that local to strengthen the bonding regional. Owing to strengthen the regional existence of bonding, can reduce hot -melt adhesive layer's glueing volume, and along with a lot of of urine volume absorbs, overburden and high slowly layering of fluffy non -woven fabrics layer make the expansion space of super absorbent polymer resin increase, consequently can promote the multiplying power that absorbs water of super absorbent polymer resin by a wide margin, simultaneously owing to strengthen the regional existence of bonding, can avoid again super absorbent polymer resin particles shift and cause rise to stick together.

Description

Absorbent core material for disposable absorbent articles

technical field

The utility model relates to the technical field of disposable absorbent articles, in particular to an absorbent core material of a highly absorbent disposable absorbent article.

Background technique

Infants, young children and other dependent persons often wear absorbent articles, such as diapers. The function of a disposable absorbent article is to contain excreta and to isolate these excreta from the wearer's body and clothing and bedding. Disposable absorbent articles, such as diapers, generally consist of a liquid topsheet, a liquid impermeable backsheet, and an absorbent and liquid containing absorbent core positioned between the liquid permeable topsheet and the liquid impermeable backsheet.

The traditional first-generation absorbent core is an absorbent core structure that is uniformly mixed with fluff pulp and superabsorbent resin, and then wrapped by spray glue of the wrapping layer material. For this absorbent core, since the superabsorbent resin is evenly distributed in the fluff pulp fibers, and the wrapping layer is only combined with upper and lower layer spray glue, there is a large free space for the superabsorbent resin to expand, so the super absorbent core in this absorbent core The utilization rate of the resin is high, and the water absorption rate of the superabsorbent resin is high. But at the same time, in order to reduce the problem of lumping and breaking of cotton in the traditional structure of the absorbent core, hot light pressing or hot net pressing is generally used for compaction, so that the softness of the traditional absorbent core material is reduced.

The second-generation absorbent core includes a first covering layer, a hot-melt adhesive layer, a superabsorbent resin layer, a high-loft non-woven fabric layer, a superabsorbent resin layer, a hot-melt adhesive layer, and a second covering layer, usually the first covering The first layer and the second cover layer are air-laid or air-through nonwovens. For the absorbent core material of this structure, the superabsorbent resin is fixed in the high-loft non-woven fabric layer or between the high-loft non-woven fabric and the cover layer, which can improve the breakage of the superabsorbent resin after absorbing urine. Cotton problem, because after the superabsorbent resin is fixed, the space available for free expansion is reduced, the utilization rate of the superabsorbent resin is low, and the water absorption rate of the absorbent core is lower than that of the traditional absorbent core.

This patent discloses a high-absorbency absorbent core material for disposable absorbent articles, aiming at the problem that the first generation absorbent core is easy to lump and break cotton, and the second generation absorbent core material has a low water absorption rate. The absorbent core material includes the first Covering layer, hot-melt adhesive layer, superabsorbent resin layer, high-loft non-woven fabric layer, superabsorbent resin layer, hot-melt adhesive layer, second covering layer. It is characterized in that the hot-melt adhesive layer is provided with a locally strengthened bonding area. Due to the existence of the reinforced bonding area, the amount of sizing of the hot melt adhesive layer can be reduced, and as the amount of urine is absorbed many times, the cover layer and the high-loft non-woven fabric layer are gradually delaminated, so that the superabsorbent resin The expansion space is increased, so the water absorption rate of the superabsorbent resin can be greatly increased, and at the same time, due to the existence of the reinforced bonding area, it can avoid lumping caused by the displacement of the superabsorbent resin particles.

Contents of the invention

The purpose of the utility model is to provide a highly absorbent absorbent core material for disposable absorbent articles in view of the deficiencies in the prior art. In order to achieve the above purpose, the utility model adopts the following technical solutions:

The absorbent core material sequentially includes a first covering layer, a hot melt adhesive layer, a super absorbent resin layer, a high bulky non-woven fabric layer, a super absorbent resin layer, a hot melt adhesive layer, and a second covering layer from top to bottom. The feature is that the hot-melt adhesive layer is provided with a locally strengthened bonding area.

Among them, the first and second covering layers are air-formed dust-free paper composed of wood pulp and ultra-fine hot-melt staple fibers or hydrophilic short fibers combed into a net and heat-set hot air, hot-rolled non-woven fabrics or hydrophilic Non-woven spunbond nonwovens. Superabsorbent resin is a high molecular weight polymer obtained by acrylic acid polymerization → high water retention, high water absorption balance under high load, the absorbed water cannot be squeezed out by simple physical methods, and can repeatedly release and absorb water. Material. The high-loft non-woven fabric layer is a kind of hot-melt fiber such as ES fiber, PP fiber, PET fiber, PE/PET and other hot-melt fibers with a fiber denier of 3.0~10.0D, a fiber length of 25~100mm, and a crimp of 1~10. , Cotton blending, card clothing carding, hot air nonwoven fabric for hot oven shaping. The hot-melt adhesive layer is a hot-melt pressure-sensitive adhesive composed of polymers such as SBS/SIS, tackifying resins such as rosin resin/petroleum resin, softeners such as naphthenic oil, and antioxidants.

Wherein, the hot-melt adhesive layer is provided with a locally strengthened bonding area as a hot-melt adhesive bonding area, and the amount of sizing in this area is 1.5 to 3.5 times that of other hot-melt adhesive layers, preferably 2.0 to 3.0 times. times.

Wherein, the local strengthened bonding area provided by the hot melt adhesive layer is the sprayed glue strengthened bonding area separated from the whole line. The total width of the whole strip of glue spraying to strengthen the bonding area accounts for 1.0%~50% of the total width of the absorbent core material, preferably 5~15%, the number of strips is 1~5, preferably 2~3, and the interval is 10 ~50mm, preferably 20~30mm.

Among them, the sizing method of the interval glue spray reinforcement area can be fiber loose spray, OMEGA, small spiral, large spiral, non-contact squeegee glue, line glue and other sizing methods.

Wherein, the locally strengthened bonding area provided by the hot-melt adhesive layer is a hot-melt bonding area of an ultrasonic wave or a hot-pressing device. The combined area accounts for 0.1%~20.0% of the total area of the absorbent core material, preferably 2.0~5.0%.

The beneficial effects of the utility model are: the absorbent core material of a highly absorbent disposable absorbent article disclosed in this patent, the absorbent core material includes a first covering layer, a hot-melt adhesive layer, a high water-absorbing resin layer, a high fluffy non-woven fabric Woven fabric layer, superabsorbent resin layer, hot melt adhesive layer, second cover layer. It is characterized in that the hot-melt adhesive layer is provided with a locally strengthened bonding area. Due to the existence of the reinforced bonding area, the amount of sizing of the hot melt adhesive layer can be reduced, and as the amount of urine is absorbed for many times, the cover layer and the high-loft non-woven layer are gradually delaminated, so that the superabsorbent resin The expansion space is increased, so the water absorption capacity of the superabsorbent resin can be greatly increased, and at the same time, due to the existence of the reinforced bonding area, it can avoid lumping caused by the displacement of superabsorbent resin particles.

Description of drawings

Fig. 1 is a schematic structural view of the absorbent core material of a highly absorbent disposable absorbent article of the present invention;

Fig. 2 is the sizing schematic diagram of the hot melt adhesive strengthening bonding of embodiment 1;

Fig. 3 is the sizing schematic diagram of the hot melt adhesive strengthening bonding of embodiment 2;

Fig. 4 is the schematic diagram of the ultrasonic strengthened bonding of embodiment 3;

Fig. 5 is a schematic diagram of the heat-pressing roller in Example 4 to strengthen the adhesion.

In the figure, 1 is the first covering layer, 2 is the hot melt adhesive layer, 3 is the reinforced bonding area, 4 is the superabsorbent resin layer, 5 is the high-loft non-woven fabric layer, 6 is the reinforced bonding area, 7 It is the second cover layer, 10 is the fiber loose spraying of the local strengthening hot melt adhesive area, 20 is the small spiral spraying glue of the partial strengthening hot melt adhesive area, 30 is the W-shaped hot pressing line of the partial strengthening ultrasonic bonding area, and 40 is Cross-shaped hot-pressing points for local strengthening of the adhesive zone of the hot-pressing device.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

Example 1

As shown in accompanying drawings 1 and 2, the absorbent core material comprises a first covering layer 1, a hot melt adhesive layer 2, a superabsorbent resin layer 4, a high bulky non-woven fabric layer 5, a superabsorbent resin layer 4, a thermal The melt adhesive layer 2, the second cover layer 7, the local reinforced bonding area 6 provided by the hot melt adhesive layer is the entire adhesive sprayed reinforced bonding area at intervals.

Among them, the first covering layer 1 and the second covering layer 7 are air-formed dust-free paper composed of wood pulp and ultra-fine hot-melt staple fibers. The square gram weight of the dust-free paper is 50g/m ² The fiber ratio is 34%, and the tensile force of the material is 2.5N/25mm.

Among them, the superabsorbent resin 4 is a high molecular weight polymer obtained by polymerization of acrylic acid, and the superabsorbent resin under the first cover layer 1 is a superabsorbent resin with slow absorption, high water retention, and coarse particles, and its absorption rate is 50. times, the water retention ratio is 36 times, and the absorption speed is 80s; the superabsorbent resin on the second covering layer 7 is fast-absorbing, high-absorbent, fine-grained superabsorbent resin, the absorption ratio is 60 times, and the water retention ratio is 30 times, the absorption speed is 60s.

Among them, the high-loft non-woven fabric layer 5 is a hot-air non-woven fabric with a fiber denier of 6.0D, a fiber length of 38mm, and 6 crimps of PET fibers that have been opened, mixed with cotton, carded with card clothing, and shaped in a hot oven.

Wherein, the hot-melt adhesive layer 2 is a hot-melt pressure-sensitive adhesive composed of a high polymer such as SBS/SIS, a tackifying resin such as rosin resin/petroleum resin, a softener such as naphthenic oil, and an antioxidant. The sizing amount is 1.0~3.0g/m ² to ensure that the superabsorbent resin does not move when it is dry.

Wherein, the local reinforced bonding area 6 provided by the hot-melt adhesive layer 2 is an interval of the entire glue spraying to strengthen the bonding area, and the glue type of spraying glue is fiber loose spraying 10, and the interval of the entire strip of glue spraying to strengthen the bonding area The total width accounts for 10% of the total width of the absorbent core material, the number of strips is 2, and the interval is 25mm.

Example 2

As shown in accompanying drawings 1 and 3, the absorbent core material comprises a first covering layer 1, a hot melt adhesive layer 2, a superabsorbent resin layer 4, a high bulky non-woven fabric layer 5, and a second covering layer 7. The local reinforced bonding area 6 provided by the hot melt adhesive layer is the entire glue spraying reinforced bonding area at intervals.

Wherein, the first covering layer 1 and the second covering layer 7 are air-through nonwoven fabrics, the square gram weight of the air-through nonwoven fabrics is 30g/m ² , the fibers are PET fibers, and the tensile force of the materials is 2.5N/25mm.

Among them, the superabsorbent resin 4 is a high molecular weight polymer obtained by polymerization of acrylic acid, and the superabsorbent resin under the first cover layer 1 is a superabsorbent resin with slow absorption, high water retention, and coarse particles, and its absorption rate is 50. times, the water retention ratio is 36 times, and the absorption speed is 80s; the superabsorbent resin on the second covering layer 7 is fast-absorbing, high-absorbent, fine-grained superabsorbent resin, the absorption ratio is 60 times, and the water retention ratio is 30 times, the absorption speed is 60s.

Among them, the high-loft non-woven fabric layer 5 is a hot-air non-woven fabric with a fiber denier of 6.0D, a fiber length of 38mm, and ES fibers with 6 crimps after opening, cotton blending, card clothing carding, and heat oven shaping.

Wherein, the hot-melt adhesive layer 2 is a hot-melt pressure-sensitive adhesive composed of a high polymer such as SBS/SIS, a tackifying resin such as rosin resin/petroleum resin, a softener such as naphthenic oil, and an antioxidant. The sizing amount is 1.0~3.0g/m ² to ensure that the superabsorbent resin does not move when it is dry.

Wherein, the local reinforced bonding area 6 provided by the hot-melt adhesive layer is a small spiral glue spraying reinforced bonding area 20 at intervals, and the total width of the entire glue spraying reinforced bonding area at intervals accounts for 10% of the total width of the absorbent core material , the number of strips is 2, and the interval is 25mm.

Example 3

As shown in accompanying drawings 1 and 4, the absorbent core material comprises a first covering layer 1, a hot melt adhesive layer 2, a superabsorbent resin layer 4, a high-loft non-woven fabric layer 5, and a second covering layer 7. The locally strengthened bonding area 6 provided by the hot melt adhesive layer is an ultrasonic hot-melt reinforced bonding area.

Wherein, the first covering layer 1 and the second covering layer 7 are air-through nonwoven fabrics, the square gram weight of the air-through nonwoven fabrics is 30g/m ² , the fibers are PET fibers, and the tensile force of the materials is 2.5N/25mm.

Among them, the superabsorbent resin 4 is a high molecular weight polymer obtained by polymerization of acrylic acid, and the superabsorbent resin under the first cover layer 1 is a superabsorbent resin with slow absorption, high water retention, and coarse particles, and its absorption rate is 50. times, the water retention ratio is 36 times, and the absorption speed is 80s; the superabsorbent resin on the second covering layer 7 is fast-absorbing, high-absorbent, fine-grained superabsorbent resin, the absorption ratio is 60 times, and the water retention ratio is 30 times, the absorption speed is 60s.

Among them, the high-loft non-woven fabric layer 5 is a hot-air non-woven fabric with a fiber denier of 6.0D, a fiber length of 38mm, and ES fibers with 6 crimps after opening, cotton blending, card clothing carding, and heat oven shaping.

Wherein, the hot-melt adhesive layer 2 is a hot-melt pressure-sensitive adhesive composed of a high polymer such as SBS/SIS, a tackifying resin such as rosin resin/petroleum resin, a softener such as naphthenic oil, and an antioxidant. The sizing amount is 1.0~3.0g/m ² to ensure that the superabsorbent resin does not move when it is dry.

Wherein, the ultrasonic hot-melt reinforced bonding area 6 provided on the hot-melt adhesive layer is bonded by a W-shaped hot-pressing line 30 with a width of 5 mm, and the direction is parallel to the length direction of the absorbent core of the disposable absorbent product. The number of W-shaped hot pressing lines is 2, and the transverse interval is 25mm.

Example 4

As shown in accompanying drawings 1 and 5, the absorbent core material comprises a first covering layer 1, a hot melt adhesive layer 2, a superabsorbent resin layer 4, a high bulky non-woven fabric layer 5, and a second covering layer 7. The locally strengthened bonding area 6 provided by the hot melt adhesive layer is the hot-melt reinforced bonding area of the hot pressing device.

Wherein, the first covering layer 1 and the second covering layer 7 are air-through nonwoven fabrics, the square gram weight of the air-through nonwoven fabrics is 30g/m ² , the fibers are PET fibers, and the tensile force of the materials is 2.5N/25mm.

Among them, the superabsorbent resin layer 4 is a high-molecular-weight polymer obtained by acrylic acid polymerization. The superabsorbent resin under the first covering layer is a superabsorbent resin with slow absorption, high water retention, and coarse particles, and its absorption rate is 50. times, the water retention ratio is 36 times, and the absorption speed is 80s; the superabsorbent resin on the second covering layer is fast-absorbing, high-absorbent, fine-grained superabsorbent resin, the absorption ratio is 60 times, and the water retention ratio is 30 times , the absorption speed is 60s.

Among them, the high-loft non-woven fabric layer 5 is a hot-air non-woven fabric with a fiber denier of 6.0D, a fiber length of 38mm, and ES fibers with 6 crimps after opening, cotton blending, card clothing carding, and heat oven shaping.

Wherein, the hot-melt adhesive layer 2 is a hot-melt pressure-sensitive adhesive composed of a high polymer such as SBS/SIS, a tackifying resin such as rosin resin/petroleum resin, a softener such as naphthenic oil, and an antioxidant. The sizing amount is 1.0~3.0g/m ² to ensure that the superabsorbent resin does not move when it is dry.

Wherein, the hot-pressing device provided for the hot-melt adhesive layer 2 is hot-melted, and the bonding method is a cross-shaped hot-pressing point 40 hot-melt reinforcement method, the length of the cross-shaped character is 1.5mm, and the interval between the points is 1.5m. 3 dots are distributed in each row, the number of hot-pressed dot matrix is 2, and the horizontal interval is 25mm.

The above is only a preferred embodiment of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope are all included in the utility model patent application scope .

Claims (10)

1. An absorbent core material for disposable absorbent articles, comprising a first covering layer, a hot-melt adhesive layer, a superabsorbent resin layer, a high-fluff non-woven fabric layer, a superabsorbent resin layer, and a hot-melt adhesive from top to bottom layer, the second cover layer, characterized in that: the hot-melt adhesive layer is provided with a locally strengthened bonding area. 2 . The absorbent core material of a disposable absorbent product according to claim 1 , characterized in that: the locally reinforced bonding area provided by the hot melt adhesive layer is a hot melt adhesive bonding area. 3 . 3. The absorbent core material of a kind of disposable absorbent article according to claim 1 or 2, characterized in that: the adhesive layer thickness of the locally reinforced hot-melt adhesive bonding area provided by the hot-melt adhesive layer is the thickness of the non-reinforced hot-melt adhesive. 1.5-5.0 times the thickness of the adhesive layer in the melt adhesive bonding area. 4. The absorbent core material of a disposable absorbent article according to any one of claims 1 or 2, characterized in that: the local reinforced bonding area set by the hot melt adhesive layer is the entire strip of sprayed glue reinforced at intervals Adhesive area. 5. The absorbent core material of a disposable absorbent article according to claim 4, characterized in that: said hot melt adhesive layer is set at intervals where the entire width of the glue-sprayed and strengthened bonding area is 100% of the total transverse width of the absorbent core material. The width of 1.0%-50% of the total horizontal width. 6. The absorbent core material of a disposable absorbent product according to claim 4, characterized in that: the number of strips of the entire strip sprayed with glue to strengthen the bonding area set by the hot melt adhesive layer is 1-5 . 7. The absorbent core material of a disposable absorbent article according to claim 4, characterized in that: said hot melt adhesive layer is provided with a width of 10-50mm in the transverse direction of the whole spray glue strengthening bonding area . 8 . The absorbent core material of a disposable absorbent product according to claim 1 , characterized in that: the locally strengthened bonding area provided by the hot melt adhesive layer is an ultrasonic hot-melt bonding area. 9 . The absorbent core material of a disposable absorbent product according to claim 1 , characterized in that: the locally strengthened bonding area provided by the hot melt adhesive layer is a hot-melt bonding area of a hot-pressing device. 10 . 10. The absorbent core material for disposable absorbent articles according to claim 1, 8 or 9, characterized in that: the hot-melt adhesive area of the hot-melt adhesive reinforcement area provided by the hot-melt adhesive layer accounts for 10% of the absorbent core material. The area of 0.1%-20.0% of the total area of the material.