JP4090136B2 - Method for producing breast milk pad - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a method of manufacturing a breast milk pad for a breastfeeding mother to interpose between an underwear such as a brassiere and a breast.
[0002]
[Prior art]
Conventionally, such a breast milk pad is used as shown in FIG. 5, for example.
In the figure, breast milk pads 1 and 1 each having a substantially circular dome shape are interposed one by one inside each cup 3 and 3 of the brassiere 2.
[0003]
Such breast milk pads 1 and 1 are formed in a circular dome shape as shown in FIG. 6 which is a front view and FIG. 7 which is a side view, and are configured by laminating a plurality of flexible materials in the thickness direction. Has been. That is, the breast milk pad 1 arrange | positions a surface material on the inner surface which contacts a user's skin directly, arrange | positions an absorber next, and a liquid oozes out from an absorber at least on the outer side, and it may stain clothes. The waterproof material is laminated so that there is no.
[0004]
In this case, as the waterproof material, for example, polyethylene laminated paper obtained by laminating a plurality of polyethylene materials is used so that it has waterproof performance and can be thermoformed in the heat deformation step described later.
[0005]
Further, an adhesive part 4 to which an adhesive or the like is applied is provided at a predetermined position on the surface side of the waterproof material, and the adhesive part 4 is attached to the inside of the cup 3 of the brassiere 2 as shown in FIG. Use with fixing. Thereby, it is used so that underwear and breast milk pad 1 may not shift.
[0006]
[Problems to be solved by the invention]
By the way, such a breast milk pad 1 needs to be formed in a dome shape as described above so that it can be used in close contact with the front surface (not shown) of the user's breast.
In order to manufacture the breast milk pad 1 in such a shape, the conventional method is as shown in FIG.
[0007]
In FIG. 8, after each material used as the main body of the breast milk pad 1 is laminated | stacked as mentioned above, it arrange | positions on the female type | mold 5 which has a concave inner surface. Next, the male mold 6 having a dome-shaped convex surface as shown is lowered and pressed by the male mold 6 and / or the female mold 5 while being heated to, for example, about 120 degrees Celsius.
Thereby, the main body of the heated breast milk pad 1 is hardened after the polyethylene laminated paper as the waterproof material is thermally deformed, and is formed in a dome shape along the inner surface of the female mold 5.
[0008]
Thus, since it is necessary to apply high heat and deform into a dome shape in the manufacturing process, for example, the waterproof material of the above-described breast milk pad 1 uses a heat-deformable material such as polyethylene laminated paper as described above. It was.
For this reason, the breast milk pad 1 which is a product has a relatively hard texture after heat deformation as a whole, and as a product that is in direct contact with the user's skin, the touch felt on the skin is not necessarily good. .
[0009]
In this regard, the breast milk pad 1 softens the surface material (material directly in contact with the user's skin), and performs a special process in the vicinity of the periphery that is the seal portion between the surface material and the waterproof material, In some products, various considerations have been made to prevent the edges of the circular pad from causing unpleasant irritation. However, even if such a partial improvement is made, if the entire waterproof material is thermally deformed in the above-described process, it is inevitable that it will have a hard feel as a whole, and a product with a good feeling of use can be obtained. It was difficult.
[0010]
Further, even if the body of the breast pad 1 is thermally deformed as described above to form a dome shape, such processing has poor shape retention and becomes flat during use, and the front surface of the user's breast The shape becomes inconsistent with each other and the fitting property is deteriorated, resulting in misalignment. As a result, there is a problem that the breast milk leaks without being absorbed and stains the clothes.
[0011]
The present invention has been made to solve such problems, and avoids a hard feel caused by thermal deformation and a hard feel caused by a material corresponding to heat treatment, and has excellent mold holding performance. It aims at providing the manufacturing method of a breast milk pad.
[0012]
[Means for Solving the Problems]
In the invention of claim 1, the object is to provide an absorber that absorbs liquid and a waterproof material disposed outside the absorber, and an adhesive layer formed by a hot melt adhesive outside the absorber. By a method of manufacturing a breast milk pad, comprising: a laminating step of forming a main body by laminating, and a molding step of curing the hot melt adhesive at room temperature with the main body held in a dome shape. Achieved.
According to a second aspect of the present invention, in the configuration of the first aspect, the main body is disposed between a concave female mold and a convex male mold and is held in a dome shape to form the adhesive layer. The adhesive is cured.
[0013]
According to the structure of Claim 1 or 2, the state which hold | maintained the main body to the dome shape by applying the hot melt of a molten state outside the absorber of the main body of a breast milk pad, for example, between an absorber and a waterproof material The adhesive is cured at room temperature to form the adhesive layer.
Thereby, since it is not set as the dome shape by making it heat and deform | transform like conventional, a waterproof material will not become hard by heat deformation. That is, since it is not necessary to use a material corresponding to thermal deformation for the waterproof material, a soft tactile sensation can be maintained even after molding, and a product with a good usability can be obtained.
[0016]
According to a third aspect of the present invention, in the structure according to the first or second aspect , the absorber is surrounded by a tissue, and the adhesive layer is formed between the tissue and the waterproof material. And
[0017]
According to the structure of Claim 3, when the said absorber contains a granular water absorption polymer, it can prevent effectively that this polymer is discharged | emitted outside.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. As long as there is no description of the effect, it is not restricted to these aspects.
[0019]
FIG. 1 is a schematic perspective view showing an appearance of a breast milk pad according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view showing an internal structure of the breast milk pad shown in FIG.
With reference to these drawings, the structure of this embodiment will be described first.
[0020]
As shown in FIG. 2, the breast milk pad 10 is located in front of the breast 47 when the user is wearing it . In this state, the waterproof material 11 is arranged on the outside (left side in FIG. 2) of the breast milk pad 10, and the surface material 13 is arranged on the inner surface side (right side in FIG. 2).
And the absorber 12 is arrange | positioned between the surface material 13 and the waterproof material 11, and these surface material 13, the waterproof material 11, and the absorber 12 are each formed in a substantially circular shape, and are laminated | stacked so that it may overlap. In the state, the main body 18 of the breast milk pad 10 is constituted.
[0021]
Although the waterproof material 11 does not allow liquid to pass through, it is preferable to select a material that is preferably flexible to some extent by allowing water vapor to pass therethrough and preventing moisture. Further, the waterproof material 11 is formed of a flexible material as compared with a conventionally used heat-deformable waterproof material. As such a material, for example, polyethylene film, polyethylene laminated paper, polyethylene laminated nonwoven fabric, melt blown nonwoven fabric, or the like is used.
Moreover, as shown in FIG. 1, the adhesion part 4 is provided in the surface of the waterproof material 11, and this is peeled off by sticking a release paper on it, as demonstrated in FIG. The adhesive portion 4 can be attached and fixed to the inside of the cup 3 of the brassiere 2.
[0022]
The surface material 13 is a member that is in direct contact with the skin of the user, and a material that is well permeable to moisture such as breast milk and has a good texture is selected. That is, since the surface material 13 directly touches the skin of the user, a material suitable for this is selected in consideration of the good touch without damaging the skin more than necessary. Preferably, a dry mesh sheet (a mesh sheet formed of polyethylene or the like) or a nonwoven fabric is used.
[0023]
As the absorbent body 12, a material excellent in liquid absorbency is selected, and a fiber body, a laminated body, and a sheet body of pulp are used. Further, in the absorbent body 12, a polymer, which is a granular material made of a material having a function of retaining liquid as it is or semi-solidified or solidified, is used.
As such a material, for example, a water-absorbing polymer is suitable. For example, a polyacrylate copolymer, a hydrolyzate of starch-acrylonitrile graft copolymer, a starch-acrylic acid graft copolymer, polyvinyl Alcohol-acrylate copolymer, modified carboxymethyl cellulose and the like can be mentioned.
And the absorber 12 is wrapped in the tissue 15, as shown in FIG. This prevents the granular polymer and the like from leaking.
[0024]
Further, an adhesive layer 19 is provided between the absorbent body 12 constituting the main body 18 of the breast milk pad 10 and the waterproof material 11. This adhesive layer 19 is made of hot melt (hot).
mel) adhesive. The hot melt adhesive is mainly composed of, for example, an organic thermoplastic resin such as synthetic rubber or ethylene vinyl acetate, and is a solid at room temperature. However, the hot melt adhesive is melted when heated and can be applied to an adherend. After pressure bonding to the adherend, it can be cooled or solidified at room temperature. The melting temperature of the hot melt adhesive is about 175 to 205 degrees Celsius, and the melting temperature and curing time can be controlled by the components.
Here, the adhesive layer 19 may be provided outside the absorbent body 12 (left side in FIG. 2) and inside the waterproof material 11 in FIG. 2. Therefore, for example, as shown in FIG. 2, when the tissue 15 or the like is interposed between the absorbent body 12 and the waterproof material 11, it is provided between the tissue 15 and the waterproof material 11 or between the absorbent body 12. Can do. Moreover, as an adhesive, when not enjoying the advantage of using a hot melt described later, not only the hot melt adhesive but also a paste-like material such as cold glue may be used.
In the present embodiment, this hot-melt adhesive is applied to the entire surface of the tissue 15 covering the surface of the absorbent body 12 to form an adhesive layer 19 with the waterproof material 11 in a process described later.
[0025]
FIG. 3 is a schematic explanatory view showing a manufacturing process of the breast milk pad 10.
In the production line 20, the product material is conveyed leftward in the drawing by a conveying means 21 such as a conveyor belt.
In step 22 in the previous stage of product manufacture, the tissue 15 is sent from the first tissue supply means 25 to the conveying means 21 in an expanded state.
[0026]
Pulp is sprayed onto the expanded tissue 15. This pulp is sent from the pulp supply means 23 to the pulverizing means 24, and the pulp finely pulverized by the pulverizing means 24 is transferred onto the conveying means 21. The surface of the tissue 15 is sprayed.
Next, the polymer is sprayed from the polymer supply means 26 onto the pulp on the tissue 15. In this way, the absorbent body 12 is formed on the tissue 15.
[0027]
Next, the second tissue supply means 27 supplies another piece of tissue 15 and puts it on the absorber 12. Thereby, the absorber 12 is surrounded by the tissue.
Next, the product material consisting of the absorbent body 12 and the tissue 15 that wraps the absorbent body 12 that is sent in a long continuous state is cut into individual product sizes in the cutting step 28, and further sent by the conveying means 21.
[0028]
Next, for example, the nonwoven fabric as the surface material 13 is supplied to the individually cut product material by, for example, the nonwoven fabric supply means 29, and at the same time, the waterproof material supply means 32 is waterproofed on the surface opposite to the nonwoven fabric. Material 11 is supplied. Thereby, the waterproof material 11 and the surface material 13 are laminated | stacked on the surface and back surface of the absorber 12 wrapped with the tissue 15. FIG.
Here, a hot melt adhesive is applied from the hot melt supply means 31 to the front surface of the sheet-like waterproof material sent from the waterproof material supply means 11.
[0029]
In this case, the hot melt supply means 31 supplies the hot melt adhesive heated to a state where it can be applied to the sheet-like waterproof material by means such as a roll coater. Here, when hot melt is used for the adhesive, the adhesive can be applied by heating to a predetermined temperature without using a special solvent or the like. Since there is no need to consider and there is no need to dry the solvent, high-speed coating is easy. In the case of this embodiment, at a product production speed of 200 sheets per minute, curing is performed in 3 to 4 seconds, and at a production speed of 400 sheets per minute, the curing speed is 1.5 seconds to 2 seconds. It is good to do.
[0030]
As a result, the hot melt adhesive is applied to the one surface of the tissue 15 that wraps the absorbent body 12 and the back surface of the waterproof material 11, and is sent to the heat sealing step 33. Here, only the outer peripheral part (the part 18a in FIGS. 1 and 2) of the circular product material is fixed by heating and pressure bonding to form a peripheral fixing part, which is sent to the next cutting step. In the cutting step 34, all product materials are stacked and cut so as to form a circular product material corresponding to each product.
The peripheral edge fixing portion 18a may be fixed with an adhesive without using heat sealing.
[0031]
The product material after the product cutting that has finished the previous step 22 is sent to the molding step 35.
The molding process 35 is performed by a molding die 41 as shown in FIG. The molding die 41 has substantially the same configuration as that described with reference to FIG. 8, and includes a female die 45 having a concave inner surface and a male die 46 having a dome-like convex surface. The concave surface of the female mold 45 and the convex surface of the male mold 46 correspond to the dome shape of the breast milk pad 10, and the product material that has finished the previous step 22 is placed on the female mold 45 with the waterproof material 11 facing down. Is done.
[0032]
Then, as shown, the male mold 46 is lowered to press the product material against the concave inner surface of the female mold 45. Thereby, the hot melt adhesive applied to the back surface of the waterproof material 11 in the previous step 22 is cured at room temperature while the product material is deformed into a concave shape.
As a result, the hot melt adhesive is cured while the product material is deformed into a dome shape, whereby the breast milk pad 10 is completed.
[0033]
The configuration of the embodiment of the breast milk pad of the present invention is as described above, and does not employ a process of thermal deformation at a high temperature as in the prior art. For this reason, it is not necessary to use a heat-deformable material for the waterproof material 11 in particular. For example, it is possible to use a flexible material such as a nonwoven fabric or a polyethylene film.
Therefore, especially the peripheral edge 18a of the breast milk pad 10 of FIG. 1 becomes hard, and a high-quality product with good touch can be provided without giving unpleasant stimulation to the user's skin.
Moreover, the body 18 of the breast milk pad 10 is molded into a predetermined dome shape by curing the adhesive in a state where the body 18 is held in a predetermined dome shape in the molding die 41 of FIG. Therefore, it is possible to obtain a product having excellent fit without easily losing its shape after being worn by the user.
[0034]
The present invention is not limited to the above-described embodiment.
For example, a cushion material may be accommodated inside the main body 18.
Moreover, the waterproof material 11, the surface material 13, and the absorber 12 can select various materials other than the material of the above-mentioned embodiment description.
Moreover, you may select and combine each component of each above-mentioned embodiment arbitrarily.
[0035]
【The invention's effect】
As described above, according to the present invention, there is provided a method for producing a breast milk pad that is excellent in mold holding performance by avoiding a hard feel due to thermal deformation and a hard feel caused by a material corresponding to heat treatment. Can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of an embodiment of a breast milk pad according to the present invention.
2 is a schematic cross-sectional view in a state where the breast milk pad of FIG. 1 is mounted.
3 is a schematic view for explaining a manufacturing process of the breast milk pad of FIG. 1. FIG.
FIG. 4 is a diagram showing an example of a molding process when manufacturing the breast milk pad of FIG. 1;
FIG. 5 is an explanatory view showing a use state of a conventional breast milk pad.
6 is a front view of the breast milk pad of FIG. 5. FIG.
7 is a side view of the breast milk pad of FIG. 5. FIG.
8 is a schematic explanatory view showing a method for forming the breast milk pad of FIG. 5. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Breast milk pad, 11 ... Waterproof material, 12 ... Absorber, 13 ... Surface material, 15 ... Tissue, 19 ... Adhesive layer.

Claims (3)

A laminating step of forming a main body by laminating an absorbent body that absorbs liquid and a waterproof material disposed outside the absorbent body by forming an adhesive layer with a hot melt adhesive outside the absorbent body And
And a molding step of curing the hot melt adhesive at room temperature with the body held in a dome shape . And mold holding the dome by placing the body between the concave of the female and convex male, characterized in that formed by curing the hot melt adhesive constituting the adhesive layer, wherein Item 2. A method for producing a breast milk pad according to Item 1 . 3. The method of manufacturing a breast milk pad according to claim 1, wherein the absorbent body is surrounded by a tissue, and the adhesive layer is provided between the tissue and the waterproof material .

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