CN112438838A

CN112438838A - Sanitary water-absorbing core and preparation method thereof

Info

Publication number: CN112438838A
Application number: CN201910795131.6A
Authority: CN
Inventors: 董金顿
Original assignee: Fujian Qibang New Material Co ltd
Current assignee: Fujian Qibang New Material Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2021-03-05

Abstract

The invention discloses a sanitary water-absorbing core and a preparation method thereof, wherein the sanitary water-absorbing core comprises a top layer 1, an intermediate layer 2 and a bottom layer 3, the intermediate layer 2 is arranged at the bottom of the top layer 1, the bottom layer 4 is arranged at the bottom of the intermediate layer 2, the top layer 1 and the bottom layer 3 are breathable wet strength paper, and the intermediate layer 2 is a mixed layer of high-molecular water-absorbing resin and low-melting-point composite short fiber; step two, bottoming the top layer; step three, forming the middle layer; step four, covering the bottom layer; step five, compound molding; step six, detecting and storing; according to the invention, the SAP and low-melting-point composite short fiber mixing layer is arranged between the top layer and the bottom layer to improve the diffusion capacity of the moisture of blood and urine, strengthen the tensile force and prevent breakage, the low-melting-point composite short fiber can rapidly diffuse the moisture of the blood and urine, the diffused moisture is rapidly absorbed by the SAP, the utilization rate is high, the strengthening tensile force is more remarkable, and the SAP layers with different gram weights can be arranged in the middle layer to meet the requirement of absorbing the moisture.

Description

Sanitary water-absorbing core and preparation method thereof

Technical Field

The invention relates to the technical field of sanitary articles, in particular to a sanitary water-absorbing core body and a preparation method thereof.

Background

The sanitary articles comprise daily chemical articles (hand sanitizer and laundry detergent); sanitary articles for women during menstrual periods (sanitary napkins, panty liners and tampons); sanitary products for excreta such as diapers [ diapers, diapers (pads, papers), urine-proof pads ]; skin, mucous membrane sanitary products (wet paper towels, sanitary wet paper towels); contact lens care products (contact lens care solutions, contact lens preserving solutions, contact lens cleaners); gynecological hygiene products (female anti/bacteriostatic lotion, vaginal lotion); other disposable hygienic articles (tissue paper, sanitary napkin, cotton pads/paper/towel, hands/finger cot, mask, paper tableware, condom) and the like. The important components of the diaper, the diaper (pad, paper) and the urine isolation pad are the water absorption core, and the existing water absorption core has insufficient tensile strength and is easy to break, shift and agglomerate in the using process, so that the sanitary water absorption core and the preparation method thereof are necessary.

Disclosure of Invention

The invention aims to provide a sanitary water-absorbing core body and a preparation method thereof, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the sanitary absorbent core comprises a top layer 1, a middle layer 2 and a bottom layer 3, wherein the middle layer 2 is arranged at the bottom of the top layer 1, the bottom of the middle layer 2 is provided with a bottom layer 4, the top layer 1 and the bottom layer 3 are breathable wet strength paper, and the middle layer 2 is a mixed layer of high-molecular water-absorbent resin and low-melting-point composite short fiber.

A preparation method of a sanitary water-absorbing core body comprises the following steps of preparing raw materials; step two, bottoming the top layer; step three, forming the middle layer; step four, covering the bottom layer; step five, compound molding; step six, detecting and storing;

in the first step, the components are as follows according to the mass percentage: selecting 29-32.5% of breathable wet strength paper, 32.5-60% of high molecular water-absorbing resin and 10-35% of low-melting-point composite short fiber, and weighing according to the sum of the weight percentages of 1;

in the second step, half of the breathable wet strength paper is selected and laid on the workbench;

in the third step, the forming of the middle layer comprises the following steps:

1) laying a layer of low-melting-point composite short fibers on the laid breathable wet-strength paper by using an airflow forming technology;

2) then a layer of high molecular water-absorbing resin is scattered on the melting point composite short fiber layer;

in the fourth step, the rest breathable wet-strength paper is flatly laid on the high-molecular water-absorbing resin layer;

in the fifth step, the composite molding comprises the following steps:

1) pressing the core body obtained in the fourth step by an electric heating or heat conducting oil roller to enable the core body to be in a fluffy or compaction net shape after composite forming;

2) cutting the composite formed water absorption core body into a standard size according to the required specification, and removing redundant leftover materials;

and in the sixth step, the molded water-absorbing core body is subjected to a tensile test, and the qualified persons with the tensile strength are packaged and stored, and the unqualified persons are recycled.

According to the technical scheme, the high-molecular water-absorbent resin raw material needs to be in a dry, ventilated and cool environment during storage.

According to the technical scheme, the thickness of the water absorption core body is 0.2-5 mm.

According to the technical scheme, in the second step, the partition plates are arranged on the two sides, located on the breathable wet strength paper, of the workbench.

According to the technical scheme, in the step three 1), the thickness of the low-melting-point composite short fiber is 5mm or 6mm.

According to the technical scheme, in the step three 2), large airflow fluctuation is avoided when the high-molecular water-absorbent resin is spread.

According to the technical scheme, in the step five 1), the temperature of the oil roller is 80-140 ℃.

According to the technical scheme, in the sixth step, the qualified standard of the tensile strength is not lower than 53.4785N.

Compared with the prior art, the invention has the following beneficial effects: according to the sanitary water-absorbing core and the preparation method thereof, the SAP and low-melting-point composite short fiber mixing layer is arranged between the top layer and the bottom layer to increase the diffusion capacity of blood and urine water, the pulling force is enhanced, the breakage is prevented, the low-melting-point composite short fiber can rapidly diffuse and disperse the blood and urine water, the diffused blood and urine water is rapidly absorbed by the SAP, the utilization rate is high, the enhanced pulling force is more remarkable, and the SAP layers with different gram weights can be arranged in the middle layer to meet the requirement of absorbing water.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a view showing the construction of a water absorbent core of the present invention;

FIG. 2 is a process flow diagram of the present invention;

in the figure: 1. a top layer; 2. an intermediate layer; 3. a bottom layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution:

example 1:

the utility model provides a sanitary absorbent core, includes top layer 1, intermediate level 2 and bottom 3, and the bottom of top layer 1 is provided with intermediate level 2, and the bottom of intermediate level 2 is provided with bottom 4, and top layer 1 and bottom 3 are ventilative wet strength paper, and intermediate level 2 is the mixed layer of polymer water-absorbent resin and low melting point composite short fiber.

in the first step, the components are as follows according to the mass percentage: 32.5 percent of breathable wet strength paper, 45 percent of high molecular water-absorbent resin and 22.5 percent of low-melting-point composite short fiber are selected and weighed according to the sum of the weight percentages of 1;

1) laying a layer of low-melting-point composite short fibers on the flat-laid breathable wet-strength paper by using an airflow forming technology, wherein the thickness of the low-melting-point composite short fibers is 0.2mm or 5 mm;

2) then a layer of high molecular water-absorbent resin is scattered on the low-melting-point composite short fiber layer, and partition plates are arranged on the workbench and positioned on two sides of the breathable wet-strength paper;

in the fifth step, the composite molding comprises the following steps:

1) pressing the core body obtained in the fourth step by an electric heating or heat conducting oil roller to enable the core body to be compositely molded into a fluffy or compacted net shape, wherein the temperature of the oil roller is 80-140 ℃;

2) cutting the composite formed absorbent pad into standard size according to required specification, and removing redundant leftover materials;

and in the sixth step, the molded water-absorbing core body is subjected to a tensile test, the qualified persons with the tensile strength are packaged and stored, the unqualified persons are recycled, and the qualified standard of the tensile strength is not lower than 53.4785N.

Wherein, the macromolecular water-absorbing resin raw material needs to be in a dry, ventilated and shady environment when being stored; the width of the water-absorbing core body is 60 mm.

Example 2:

in the first step, the components are as follows according to the mass percentage: 26.5 percent of breathable wet strength paper, 40 percent of high molecular water-absorbent resin and 33.5 percent of low-melting-point composite short fiber are selected and weighed according to the sum of the weight percentages of 1;

1) laying a layer of low-melting-point composite short fibers on the flat-laid breathable wet-strength paper by using an airflow forming technology, wherein the length of the low-melting-point composite short fibers is 5mm or 6 mm;

in the fifth step, the composite molding comprises the following steps:

1) pressing the obtained cushion body in the fourth step by an electric heating or heat conducting oil roller to enable the cushion body to be compositely molded into a fluffy or compacted net shape, wherein the temperature of the oil roller is 80-140 ℃;

Wherein, the macromolecular water-absorbing resin raw material needs to be in a dry, ventilated and shady environment when being stored; the thickness of the water absorption core body is 0.2-5 mm.

Example 3:

the utility model provides a sanitary absorbent core, includes top layer 1, intermediate level 2 and bottom 3, and the bottom of top layer 1 is provided with intermediate level 2, and the bottom of intermediate level 2 is provided with bottom 4, and top layer 1 and bottom 3 are ventilative wet strength paper, and intermediate level 2 is that polymer water absorbent resin mixes the layer with ES fibre.

in the first step, the components are as follows according to the mass percentage: selecting 32.5% of breathable wet strength paper, 35% of high-molecular water-absorbent resin and 32.5% of low-melting-point composite short fiber, and weighing according to the sum of the weight percentages of 1;

1) laying a layer of low-melting-point composite short fibers on the flat-laid breathable wet-strength paper by using an airflow forming technology, wherein the thickness of the low-melting-point composite short fibers is 5mm or 6 mm;

in the fifth step, the composite molding comprises the following steps:

1) pressing the core body obtained in the fourth step by a heating heat-conducting oil roller to enable the core body to be compounded and molded into a fluffy or compacted net shape, wherein the temperature of the oil roller is 80-140 ℃;

Comparative example 1:

the water absorption core body of any brand of sanitary product is available in the market.

Comparative example 2:

a sanitary article absorbent core of any brand different from that of comparative example 1 is commercially available.

The above examples and comparative examples are given in the following table:

	water absorption rate	Return permeability/g	Tensile strength/N
				Example 1	60.3	6.9	64.569
Example 2	61	5.4	68.125
				Example 3	59.6	5.8	63.952
Comparative example 1	35.6	10.3	53.689
				Comparative example 2	33	8.9	52.963

In conclusion, the wet strength paper and the low-melting-point composite short fibers tightly lock the high-molecular water-absorbent resin by utilizing hot pressing, so that the slippage of the high-molecular water-absorbent resin is limited, the tensile strength of the paper is enhanced, and the water locking performance is good.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sanitary absorbent core, comprising a top layer (1), a middle layer (2) and a bottom layer (3), characterized in that: the bottom of top layer (1) is provided with intermediate level (2), the bottom of intermediate level (2) is provided with bottom (4), top layer (1) and bottom (3) are ventilative wet-strength paper, intermediate level (2) are the mixed layer of polymer water-absorbing resin and low melting point composite short fiber.

2. A preparation method of a sanitary water-absorbing core body comprises the following steps of preparing raw materials; step two, bottoming the top layer; step three, forming the middle layer; step four, covering the bottom layer; step five, compound molding; step six, detecting and storing; the method is characterized in that:

2) then a layer of high molecular water-absorbing resin is scattered on the low-melting-point composite short fiber layer;

in the fifth step, the composite molding comprises the following steps:

3. A sanitary absorbent core as defined in claim 1, wherein: the raw material of the high-molecular water-absorbent resin needs to be in a dry, ventilated and cool environment when being stored.

4. A sanitary absorbent core as defined in claim 1, wherein: the thickness of the water absorption core body is 0.2-5 mm.

5. A method for preparing a sanitary absorbent core as claimed in claim 2, wherein: and in the second step, the two sides of the breathable wet strength paper on the workbench are provided with clapboards.

6. A method for preparing a sanitary absorbent core as claimed in claim 2, wherein: in the step three 1), the length of the low-melting-point composite short fiber is 5mm or 6mm.

7. A method for preparing a sanitary absorbent core as claimed in claim 2, wherein: in the step three 2), large airflow fluctuation is avoided when the high-molecular water-absorbent resin is spread.

8. A method for preparing a sanitary absorbent core as claimed in claim 2, wherein: in the step five 1), the temperature of the oil roller is 80-140 ℃.

9. A method for preparing a sanitary absorbent core as claimed in claim 2, wherein: and in the sixth step, the qualified standard of the tensile strength is not lower than 53.4785N.