JP2927785B1 - Cooling sheet agent - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To increase the amount of volatilization, prolong the duration of a cooling effect, and increase the amount of water, alcohol, etc. by adding a large amount of water, alcohol, etc. to a support itself of a cooling sheet agent, for example, a nonwoven fabric itself. It is an object of the present invention to provide a cooling sheet which enhances the cooling effect of the affected part by increasing the transpiration and vaporizing power of the volatile components of the above and further enhances the adhesion to the skin. SOLUTION: A non-woven fabric of super-absorbent fibers made of super-absorbent acrylic fiber is used as an intermediate layer, and the intermediate layer is impregnated with a liquid having a cooling effect, and a lower layer which is a side of the intermediate layer which is in close contact with the skin. Is a non-woven sheet made of rayon fiber, the upper layer outside the intermediate layer is polyester (PE
A cooling sheet agent comprising a nonwoven fabric made of any one of T), polypropylene (PP), and nylon fibers or a fiber obtained by blending them, and three layers of nonwoven fabric combined by entanglement of the layers of each nonwoven fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a cooling sheet for cooling skin for medical use and cosmetic use.

[0002]

2. Description of the Related Art Conventionally, as a cooling sheet agent generally used for medical and cosmetic purposes, a gel plaster mainly composed of a water-soluble polymer which absorbs a relatively large amount of water is spread and applied to a nonwoven fabric. Things are known.

[0003]

The above-mentioned conventional cooling sheet generally used for medical and cosmetic purposes is obtained by applying water-soluble polymer gelled with water to the skin. Cool, but there is a limit to the amount of water absorbed, it is not always able to absorb a sufficient amount, usually it is a water-soluble polymer, so it can only contain a certain amount of alcohol and the volatility of water Poor, and therefore, the cooling effect was insufficient. In addition, there is a problem that the adhesive base material made of the water-soluble polymer remains on the skin and may cause rash on the skin.

[0004] Further, as a cooling sheet agent generally used for medical and cosmetic purposes, a non-woven fabric made of a fiber which absorbs a relatively large amount of water is used as a moisture-absorbing layer, and an outer layer is made of a coating material so that water does not leak. Sealed with an adhesive or the like, and coated with polyethylene (PE), polypropylene (P
P), vinyl ethylene oxide (EVA), polystyrene (PS) and other films are conceivable.However, in order to contain a large amount of liquid volatile components such as water and alcohol that have a cooling effect even with a normal water-absorbing nonwoven fabric Insufficiently, the cooling action does not last long, and the gas of the liquid volatile component in the cooling sheet is blocked by the sealing film, does not diffuse outside, and the cooling action is hindered. Yes, nonwoven fabrics that absorb normal moisture also have the problem of poor adhesion to the skin.The nonwoven fabric of the moisture absorbing layer and the film of the outer layer use an adhesive or the like, but the adhesive is There is also a problem that each layer dissolves due to melting, and there is also a problem that the melted adhesive itself causes skin disorders such as skin rash and itching.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a support for a cooling sheet agent itself, for example, a nonwoven fabric itself, by including a large amount of water, alcohol, etc. Increase the amount of water, extend the duration of the cooling effect,
An object of the present invention is to provide a cooling sheet that has an enhanced vaporizing power to enhance the cooling effect of an affected area and further enhances adhesion to the skin.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a non-woven fabric of super-absorbent fiber made of super-absorbent acrylic fiber is used as an intermediate layer, and the intermediate layer is used as the intermediate layer. Impregnates a liquid with a cooling effect,
The lower layer on the side of the intermediate layer which is in close contact with the skin is a non-woven fabric sheet made of rayon fiber, and the upper layer on the outside of the intermediate layer is any of polyester (PET), polypropylene (PP), nylon fibers or a blend of these. This is a cooling sheet agent comprising a three-layered nonwoven fabric formed by entangled layers of the respective nonwoven fabrics. The effect is that the middle layer absorbs a large amount of water into the super-absorbent fiber, so the cooling effect is enhanced and the durability is increased.The upper layer is a non-woven fabric made of fibers that do not absorb moisture, so the surface always maintains a dry feeling. And, the large amount of water absorbed by the super absorbent fibers evaporates and the water vapor is released to the outside through the gap between the eyes of the nonwoven fabric.
The evaporation of the liquid is promoted, and the cooling effect is enhanced. Also, since the lower layer of the cooling sheet was made of non-woven fabric made of rayon fiber,
It has the effect of improving the adhesion to the skin. Furthermore, since the three layers of nonwoven fabric are stacked and the fibers of each layer are entangled by a needle punch method or the like and are physically (mechanically) bonded, there is an effect that the three layers are not broken by moisture.

In order to solve the above-mentioned problem, the invention according to claim 2 has, in addition to the structure of claim 1, a cut which penetrates from the upper layer to the lower layer of the cooling sheet, and the plurality of cuts are formed in parallel. The disposed cooling sheet agent, and its function is to improve the adhesiveness to the skin by applying it to the skin by pulling in the direction perpendicular to the direction of the cut.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to Examples and Comparative Examples which are preferred embodiments of the present invention.

[Example 1] In Example 1, a cooling sheet agent for medical use and cosmetics is used, and a super-absorbent fiber Lanseal F (registered trademark: Toyobo Co., Ltd.) is used as a support to be used. This super-absorbent fiber has a two-layer structure with an outer layer that has been superabsorbed by a special method and an inner layer that is an acrylic fiber. When it comes into contact with water, it immediately absorbs water and swells. Since it is as it is, it is a composite functional fiber that maintains the physical properties of the acrylic fiber. The super-absorbent fiber Lanseal F has the following physical properties.

[0010]

[Table 1]

However, the measurement of the water absorption in the above (a) is 0.4 g
Super-absorbent fiber Lanseal F is immersed in 300 ml of pure water, left for 30 minutes with stirring, then poured on a 32 mesh sieve and drained for 10 minutes, and the gel-like super absorbent fiber remaining on the mesh The amount of Lanseal F is calculated by the following equation.

[0012]

[Equation 1] Water absorption (ml / g) = (gel weight-0.4) /0.4

The measurement of the water retention under the load of the above (b) was performed on a 10 cm × 10 cm super-absorbent fiber Lanseal F nonwoven fabric.
1% saline solution is sufficiently absorbed (about 50 ml / g), drained, and then a load of 5 kg is applied thereto. Then, the weight of the nonwoven fabric is measured. And, as described above, the superabsorbent fiber absorbs a large amount of water, does not separate even if a little pressure is applied, reaches 70% of the equilibrium water absorption in just 30 seconds, and swells to the original About 12 times the diameter of acrylic fiber. In addition, it has the property that there is no toxicity and the strength is not lower than that of acrylic fiber.

Here, the cooling sheet of Example 1 is as follows:
As shown in Table 2, the above super-absorbent fibers are used as the support, and the cooling sheet agent is used as an intermediate layer, and the lower layer on the side of the intermediate layer that is in close contact with the skin is a nonwoven fabric made of rayon fibers. The upper layer outside the intermediate layer is made of a non-woven fabric of polyester (PET) that hardly absorbs liquid, and three layers of non-woven fabric are stacked, and the respective layers are joined by a needle punch method. Degree. (Upper layer 1, middle layer 2, lower layer 3 in FIG.
See

The upper layer of the cooling sheet thus manufactured is a nonwoven fabric of polyester (PET) that does not absorb moisture, so that the surface always maintains a dry feeling, and the large amount of water absorbed by the superabsorbent fibers. The moisture of the non-woven fabric evaporates, and the water vapor is released to the outside through the gap between the eyes of the non-woven fabric. The lower layer of the cooling sheet was made of a nonwoven fabric made of rayon fiber in order to improve the adhesion to the skin. Furthermore, since superabsorbent fibers absorb a large amount of purified water, the use of an adhesive or the like is not appropriate for bonding the upper layer, intermediate layer, and lower layer. Since the fibers of each layer are entangled and physically (mechanically) bonded by the punch method, the bonding of the three layers is not broken even if a large amount of water is present.

On the other hand, a comparative example for explaining the function of the embodiment 1 will be described. The cooling sheet of the comparative example is a nonwoven fabric used for a normal cooling sheet in place of the superabsorbent fiber of the embodiment 1. Which is as shown in [Table 3] below.

[0017]

TABLE 2 Material fibers (denier × fiber length) Configuration of the cooling sheets of Examples 1 organizational usage layer: polyester (PET) 1.5d × 51 mm 90% by weight nonwoven 50g / m ² 6.0d × 64mm 10 wt% Intermediate layer: Super absorbent fiber 1.5d × 51mm 100% by weight Non-woven fabric 80g / m ² (Lanseal F (registered trademark: Toyobo Co., Ltd.)) Lower layer: Rayon 1.5d × 38mm 100% by weight Non-woven fabric 30g / m ² (Spunlace : Non-woven fabric entangled with jet water flow)

[0018]

[Table 3] Configuration of the cooling sheet of Comparative Example Material fibers (denier × fiber length) tissue consumption upper: polyester (PET) 1.5d × 51 mm 90% by weight nonwoven 50g / m ² 6.0d × 64mm 10 wt% intermediate Layer: 1.5d × 51mm 100% by weight non-woven fabric 80g / m ² Lower layer: 1.5d × 38mm 100% by weight non-woven fabric 30g / m ² (spun lace)

Here, sodium polyacrylate is added to
After dissolving in purified water while stirring at a temperature of 70 ° C., the mixture was dissolved at room temperature, and ethyl alcohol was added and mixed well to prepare an immersion liquid. The cooling sheet (13 cm × 5 cm) of Example 1 in [Table 2] and the cooling sheet (13 cm × 5 cm) of Comparative Example in [Table 3] were immersed in the immersion liquid for about 5 minutes, and then taken out and tested. Sample. The absorption amount (maximum) of the immersion liquid in both cooling sheets is as follows in the cooling sheet of Example 1.
It was 11.0 ml for the cooling sheet of the comparative example and 1.0 ml.

The composition of the immersion liquid is as shown in Table 4 below.

[0021]

[Table 4] Composition of the immersion liquid Ethyl alcohol ----- 5 parts by weight Sodium polyacrylate --0.2 parts by weight Purified water --94.8 parts by weight --- Total 100.0 parts by weight

In the comparative test method, both cooling sheet agents prepared by the above method were used under healthy indoor conditions at a room temperature of 27 ° C. and a humidity of 60%.
It was applied to the left back of a 28-year-old adult male (body weight 57 kg), and the skin temperature at the application site was measured over time using Coretemp PD-K161 (manufactured by Terumo Corporation). After 3 hours, the cooling sheet agent of the comparative example was applied to the right back of the subject under the same conditions using the same subject, and the skin temperature of the application site was measured in the same manner as described above. The experimental results of Example 1 and Comparative Example are shown in the graph of FIG.
In the cooling sheet agent of the example of the present invention, the skin temperature of the application site rapidly decreases after application, reaches the minimum skin temperature at 6:00 seconds after application, and the degree of the decrease is about 3.5 ° C. compared to before application. It showed a low skin temperature, and after maintaining the cooled state for 60 minutes, gradually showed a tendency to recover to the temperature before application.

On the other hand, as shown by the dotted line B, in the cooling sheet preparation of the comparative example, the skin temperature at the application site rapidly decreased after application, but reached the minimum skin temperature at 6:00 seconds after application.
The degree of the decrease was a skin temperature lower by 2.5 ° C. than before the application. The duration was short, about 30 minutes, and showed a tendency to recover immediately. In about 100 minutes after application, the skin temperature almost recovered to that before application.

From the above results, the cooling sheet of Example 1 according to the present invention is far superior to the cooling sheet agent of the comparative example in all of the cooling rate, the degree of cooling and the duration of the applied portion. Characteristics were obtained.

Next, the present invention will be specifically described with reference to Embodiment 2 which is a preferred embodiment of the present invention. [Embodiment 2] As shown in FIG. 2, the cooling sheet of Embodiment 2 has a plurality of cuts (cut portions) 4 penetrating the upper layer 1, the intermediate layer 2, and the lower layer 3 in the cooling sheet of Embodiment 1 described above. The books are arranged in parallel. That is, on the cooling sheet (a = 13 cm × b = 5 cm) of Example 1, nine cuts 4 having a width of c = 1 cm are provided in parallel at equal intervals, and two groups of the same cuts are arranged. Therefore, the results of the adhesive strength comparison test of the following three types of cooling sheet agents will be described. 1) The cooling sheet agent of Example 2 (with cuts: see FIG. 2) 2) The cooling sheet agent of Example 1 (no cut) 3) The cooling sheet agent of Comparative Example (described in Example 1) Comparative Example Performed In the comparative test method, the subjects were five men aged 21 to 35 years, all of whom had no allergic history.

Then, a cooling sheet was stuck on the forehead of the subject, and the subject was returned to normal life after holding it lightly by hand. The time until the sheet was peeled off the forehead was measured in minutes. After completing one application, the subject cleans his / her face and wipes the forehead, attaches another subject again at intervals of 30 minutes (non-application state), and performs the same procedure as above. Tested. Further, the same treatment was performed on the remaining one specimen. However, the test was terminated when two hours had passed after the application, and the subject affixed to the forehead at that time was determined to be 120 minutes or longer. In addition, the cooling sheet agent of Example 2 (with a cut)
Was basically stretched slightly to the left and right when pasting. Table 5 shows the test results under the above conditions.

[0027]

Table 5 Results of Comparative Test of Adhesive Strength of Cooling Sheet Agent Example 2 Example 1 Comparative Example No. (using super super absorbent fiber) (using super super absorbent fiber) (using ordinary super absorbent fiber) 1 120 minutes or more 90 minutes 68 minutes 2 120 minutes or more 75 minutes 45 minutes 3 120 minutes or more 88 minutes 30 minutes 4 120 minutes or more 112 minutes 43 minutes 5 120 minutes or more 97 minutes 57 minutes Average 120 minutes or more 92.4 minutes 48.6 Minute

From the results of the above adhesive strength comparison test, Example 2
Of the cooling sheet agent of 5 out of 5 cases was 12 until the end of the test.
Application for 0 minutes or more was possible. On the other hand, Embodiment 1
None of the cooling sheet preparations could be applied until the end of the test, and the average application time for 5 cases was 92.4 minutes.
Also, the cooling sheet agent of the comparative example was 68 minutes even if it could be stuck for the longest time, and the average of 5 cases was 48.6 minutes, which was 3 minutes.
This was the shortest application time among the types of subjects.

From the above results, the cooling sheet using the super-high water-absorbing fiber can extend the application time of the cooling sheet of the comparative example using the conventional nonwoven fabric by about twice, and furthermore, By applying a cut (cut portion) 4 to the preparation itself, the application time was further extended.

It is needless to say that the present invention is not limited to the above two embodiments unless the characteristics of the present invention are impaired. For example, in both the embodiments, the upper layer of the cooling sheet is made of a polyester (PET) non-woven fabric. However, as a matter of course, any material having a dry feeling, such as polypropylene (PP) or nylon, may be used.

[0031]

According to the first aspect of the present invention, a nonwoven fabric of superabsorbent fibers made of superabsorbent acrylic fibers is used as an intermediate layer, and the intermediate layer is impregnated with a liquid having a cooling effect. The lower layer on the side of the intermediate layer that is in close contact with the skin is a nonwoven fabric sheet made of rayon fiber, and the upper layer outside the intermediate layer is polyester (PET) / polypropylene (P
P) ・ A non-woven fabric consisting of any fiber of nylon or a blend of these fibers, and a cooling sheet agent combining three non-woven fabrics by entanglement of each non-woven fabric layer,
The middle layer absorbs a large amount of water in the super absorbent fiber,
The cooling effect increases and the durability increases, and the upper layer is a non-woven fabric made of fibers that do not absorb moisture, so that the surface always maintains a dry feeling, and the large amount of moisture absorbed by the super absorbent fibers evaporates to form steam. Is released from the gaps of the nonwoven fabric to the outside, and the effect of promoting the evaporation of the liquid and increasing the cooling effect is obtained. In addition, since the lower layer of the cooling sheet is made of a non-woven fabric made of rayon fiber, the effect of improving the adhesion to the skin is obtained. Due to the physical (mechanical) connection, there is no need to use an adhesive, and the effect of preventing the three layers from being broken by moisture can be obtained.

According to the invention described in claim 2, according to claim 1
In addition to the above configuration, the cooling sheet is provided with cuts penetrating from the upper layer to the lower layer, and the cuts are made of a plurality of cooling sheet agents arranged in parallel, so that the cuts are applied to the skin in a direction perpendicular to the direction of the cuts. In this case, the effect of further improving the adhesion to the skin can be obtained.

[Brief description of the drawings]

FIG. 1 is a graph showing changes in skin surface temperature caused by using a cooling sheet agent of Example 1 of the present invention and a cooling sheet agent of a comparative example.

FIG. 2 is a perspective view of a cooling sheet agent according to a second embodiment of the present invention.

[Explanation of symbols]

 A: Cooling sheet agent of Example B: Cooling sheet agent of Comparative Example 1 ... Upper layer of cooling sheet agent 2 ... Middle layer of cooling sheet agent 3 ... Lower layer of cooling sheet agent 4. ..Break (cut portion)

Claims (2)

(57) [Claims] 1. An intermediate layer made of a non-woven fabric of super-absorbent fibers made of an acrylic fiber subjected to a super-absorbent treatment, and the intermediate layer is impregnated with a liquid having a cooling effect, and is provided on the side of the intermediate layer which is in close contact with the skin. The lower layer is a nonwoven fabric sheet made of rayon fiber, and the upper layer outside the intermediate layer is polyester (PET).
A cooling sheet agent comprising a nonwoven fabric made of any one of polypropylene (PP) and nylon fibers or a fiber obtained by blending them, and three layers of nonwoven fabrics joined by entanglement of the layers of each nonwoven fabric. 2. The cooling sheet agent according to claim 1, wherein the cooling sheet is provided with cuts penetrating from an upper layer to a lower layer, and the cuts are arranged in a plurality in parallel.