JP2005143760A - Bedding sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bedding sheet having a good touch and having a quick sleep fall and a sufficient sleep effect.
SOLUTION: A bedding sheet 10 of the present invention includes a first fiber sheet 1 supporting a sedative essential oil component and a second fiber sheet 2 containing 20 to 90% by weight of hydrophilic fibers, and the second fiber sheet 2 is provided on the body. Placed on the side in contact with The second fiber sheet 2 is composed of two layers each containing hydrophilic fibers, the first layer 2a contains 90% by weight or more of hydrophilic fibers, and the second layer 2b contains 30 to 70% by weight of hydrophilic fibers. The first layer 2a is disposed on the side in contact with the body.
[Selection] Figure 1

Description

  The present invention relates to a bedding sheet having a multilayer structure.

  There are various stress factors in modern society, and many people suffer from stress. In general, when subjected to physical and mental stress, if the parasympathetic and sympathetic nerves are unbalanced and the autonomic nervous system malfunctions, an increased mental state is induced, leading to rapid sleep and adequate sleep. It is known that sleep is disturbed. In order to alleviate the problem, it is also known that it is effective to make the parasympathetic nerve function relatively superior to the sympathetic nerve function. As a method of making the parasympathetic nerve dominant, for example, a method by aromatherapy in which a fragrance composition is vaporized and inhaled is employed (see, for example, Patent Document 1), and these methods can provide a quick sleep and sufficient sleep effect. In order to apply this method, a method of attaching a fragrance composition to bedding has also been proposed (see, for example, Patent Documents 2 and 3).

  In addition, research has been conducted on agents that act regardless of individual differences such as sensitivity to fragrance and palatability, etc., and it exhibits sedation and other effects on people with excessive sympathetic nerves, and excessive parasympathetic nerves. Stress relieving agents that can return to a physiologically optimal state have been developed for people who are in a dominant state (see, for example, Patent Document 4).

  Patent Document 4 describes that cedrol is used in a state where it can be volatilized by natural volatilization or by treatment such as heating and ultrasonic irradiation.

  On the other hand, in order to obtain a deep sleep state after falling asleep, it is said that a sleep environment in which the deep body temperature (brain temperature, rectal temperature) can be lowered is important. In order to make it easy to lower the deep body temperature, it is said that making the skin surface wet by sweating after falling asleep is not preferable because it reduces heat dissipation and it is necessary to absorb sweat quickly.

Japanese Patent Laid-Open No. 6-40911 Japanese Patent Laid-Open No. 9-154677 Japanese Patent Laid-Open No. 10-66639 International Publication No. 01/58435 Pamphlet

Sesquiterpene alcohols and the like that have been confirmed to have a sedative effect are very low in volatility because they are solid at room temperature. For example, cedrol has a vapor pressure of about 2.0 × 10 ⁻⁵ kPa at 22 ° C. . Therefore, if an effect is exerted by carrying a large amount of the component on the bedding, powder falling or the like occurs, and clothes and the body are soiled. Further, if another sheet or the like is simply stacked to avoid this, volatility is inhibited and the effect cannot be exhibited. Moreover, if the above-mentioned means such as heating is applied to the bedding, there is a possibility that prompt sleep fall and sufficient sleep effect may be hindered. Furthermore, when a fragrance composition is attached to a sheet for bedding such as a pillow cover or a futon sheet, the touch of the sheet material itself may affect sleep. If the touch is bad, it may be possible to feel the feeling of the sheet for bedding, and the sleep may be worsened.

  Therefore, in order to obtain a quick sleep or sufficient sleep effect, it is also important to give a comfortable feeling to the bedding itself. In particular, if sweat stuffiness or the like occurs and sweat does not evaporate from the body, the deep body temperature of the body does not decrease, which is one of the factors that hinder sleep onset and sleep effects as described above.

  Accordingly, an object of the present invention is to carry a sufficient amount of a sedative essential oil component on a bedding to develop its effect even at room temperature without requiring a treatment such as heating and an apparatus therefor, An object of the present invention is to provide a bedding sheet that has a good touch without impairing volatility, and has a prompt sleep fall and a sufficient sleep effect.

  The present invention provides a bedding sheet comprising a first fiber sheet carrying a sedative essential oil component and a second fiber sheet containing 20 to 90% by weight of a hydrophilic fiber, and the second fiber sheet arranged on the side in contact with the body. This achieves the object.

  According to the bedding sheet of the present invention, a quick sleep effect, a sufficient sleep effect, and the like can be obtained by inhalation of the sedative essential oil component that volatilizes and the comfort of the skin.

  The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 is a schematic cross-sectional view of an embodiment of the bedding sheet of the present invention. The bedding sheet 10 includes a first sheet 1 and a second sheet 2. Both sheets 1 and 2 are integrated by a predetermined means to constitute one sheet. Both sheets 1 and 2 are fiber sheets made of a fiber material. There is no restriction | limiting in particular in the integration method of both sheets 1 and 2, For example, methods, such as heat sealing, the fusion | fusion using an embossing apparatus, adhesion | attachment by an adhesive agent, and a sewing, can be used.

The first sheet 1 carries a sedative essential oil component. Examples of the sedative essential oil component to be carried include sesquiterpene alcohol, monoterpene alcohol, diterpene alcohol, and ester compounds thereof. The sedative essential oil component is preferably solid at room temperature from the viewpoint that it can be stably carried on the bedding. In addition, from the viewpoint of the sedative effect, the sedative essential oil component is preferably sesquiterpene alcohol. In the present invention, normal temperature means 22 ° C.

  Specific examples of sesquiterpene alcohol include cedrol, β-caryophyllene alcohol, patchouli alcohol, globrol, cedrenol, farnesol, α-santalol, α-bisabolol, vetiverol, sclareol, nerolidol and the like. Cedrol, β-caryophyllene alcohol, patchouli alcohol, and globulol are preferred because they are solid at room temperature. Specific examples of monoterpene alcohol include α-terpineol, perilla alcohol, linalool, geraniol and the like. From the point of being solid at normal temperature, α-terpineol is preferable. Specific examples of the diterpene alcohol include geranyl linalool, isophytol, sclareol and the like. Sclareol is preferred because it is solid at room temperature. Examples of the terpene alcohol ester include esters of the terpene alcohol with fatty acids such as acetic acid and butyric acid.

  Among the above-mentioned terpene alcohols, it is particularly excellent in the effect of making the parasympathetic nerve superior, and relaxes the stress, increases the feeling of relaxation, and has a slight fragrance and is effective regardless of preference, so that it is effective for a quick sleep. It is particularly preferable to use cedrol, which is a substance that exhibits a good sleep effect. In addition, these sedative essential oil components can be used alone or as a mixture of two or more. Even if a liquid is included at normal temperature, it can be used in the present invention as long as it is solid at normal temperature in the case of a mixture.

  When cedrol is used as a sedative essential oil component, it is preferable to use those having a purity of 90% or more, more preferably those having a purity of 95% or more, and particularly those having a purity of 98% or more are preferable. It is preferable to use one having a purity of 99% or more. This is because the higher the purity of cedrol, the more fragrant it becomes, and the effect is less influenced by palatability.

The amount of the sedative essential oil component is 0.1 to 0.1% of the surface area (apparent surface area) of the first sheet 1 that is a carrier material from the viewpoints of high volatility, suppression of powder falling, skin feel, and improvement of durability. it is preferably 30 g / m ^2, preferably further a 1.0~15g / m ^2.

The fiber material constituting the first sheet 1 preferably has a fiber specific surface area of 0.9 to 3.0 m ² / g. As a result, the volatilization speed of the solid sedative essential oil component can be increased at room temperature, and the strength with no problem in practical use can be maintained. Moreover, since the voids are dense, powder falling can be suppressed. When the fiber specific surface area is 1.3 to 2.8 m ² / g, the volatilization rate at room temperature is further increased, and this is preferable from the viewpoint of further preventing powder falling. The fiber specific surface area is determined by a BET one-point method using a measuring device such as a Sorpty 1750 type manufactured by Carlo Elba.

As the fiber sheet constituting the first sheet 1, for example, two types of incompatible polymers are simultaneously melt extruded from the same spinning nozzle to form a nonwoven fabric, and the fiber is divided using external force such as injection of high-pressure water flow -The thing obtained by isolate | separating, the nonwoven fabric obtained by the melt blown method, etc. can be used. In addition, these fiber sheets preferably have a basis weight of 20 to 200 g / m ² , more preferably 20 to 100 g / m ² , and 40 to 100 g / m ² from the viewpoint of powder fall prevention and the like. ² is particularly preferred.

  Examples of polymers for producing these fiber sheets include polyolefins such as polyethylene (PE) and polypropylene (PP), polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyamides such as nalon, and the like. Is preferably used.

  For example, PET and nylon, PET and PP, PE and PP, and the like are preferably used as a combination of two types of polymers in the fiber that can be separated and separated by an external force. Among these, when a fiber sheet using a split / separated fiber composed of a combination of PET and PP is used as the first sheet 1, it is particularly preferable because it has excellent volatilization speed at room temperature of the sedative essential oil component and less powder falling off. .

  In addition, the fiber that can be separated / separated by external force does not have a simple rounded cross-sectional shape due to the division, and the specific surface area of the fiber is not divided due to the complex polygonal shape. It is larger than For this reason, when a fiber sheet composed of the fiber is used as a carrier for a sedative essential oil component that is solid at room temperature, the specific surface area of the crystal of the sedative essential oil component increases (that is, the crystal size decreases), and the sedative essential oil component volatilizes. It is preferable because the efficiency is further improved. In addition, it is possible to more effectively suppress the powder falling by firmly supporting a solid sedative essential oil component at room temperature.

  On the other hand, the fiber sheet made of a nonwoven fabric obtained by the melt blown method is preferably formed using PET, PP, PE or the like.

The first sheet 1 made of a fiber sheet preferably has an air permeability of ^{2 to} 40 cm ³ / cm ² · sec (JIS L 1096 Frazier method), and is 5 to 40 cm ³ / cm ² · sec. Is more preferable, and 5 to 20 cm ³ / cm ² · sec is particularly preferable. By setting the air permeability of the first sheet 1 within the above range, an excellent volatilization rate can be obtained at room temperature, and powder falling can be further suppressed. In addition, you may carry | support the sedative essential oil component solid at normal temperature to what provided the hole in the 1st sheet | seat 1 of air permeability 2-40cm < ³ > / cm < ² > / sec.

  Examples of the method of supporting the sedative essential oil component that is solid at room temperature on the first sheet 1 include a method of impregnating the support material with a solution obtained by dissolving the sedative essential oil component in a solvent and then performing a drying treatment. It is done. According to this method, the sedative essential oil component can be supported in a crystalline state. The concentration of the sedative essential oil component in the solution is preferably 0.5 to 15% by weight, more preferably 1 to 10% by weight, from the viewpoint of high volatilization and suppression of powder falling. As the solvent, lower alcohols such as ethanol, esters such as ethyl acetate, ketones such as acetone and the like can be used, and can be appropriately selected depending on the solubility of the sedative essential oil component to be carried. Moreover, you may add suitably the sedative essential oil component (for example, fragrance | flavor) etc. other than a solid sedated essential oil component at normal temperature in the said solution.

  Next, the second sheet 2 will be described. The second sheet 2 is used to give the bedding sheet 10 good skin feel, water absorption, and moisture release. As sheets having good touch and water absorption, the sheets described in JP-A-9-31823 and JP-A-7-54256 are known. These sheets use polyester fibers, polyamide fibers, and polyolefin fibers as hydrophobic fibers for the purpose of keeping the surface dry while improving water absorption, and use these fibers on the side that touches the skin. ing. However, these fibers are relatively hard and are not preferable in terms of touch. Moreover, the improvement of moisture release property is not considered. On the other hand, in the present invention, by adopting the second sheet having the structure described below, it is easy to absorb body sweat and to release moisture. The touch is also good. Further, even if the second sheet 2 and the first sheet 1 described above, that is, the sheet carrying the sedative essential oil component are used in an overlapping manner, the volatility of the sedative essential oil component is not impaired, Comfortable sleep is obtained by the synergistic effect of 2.

  The second sheet 2 contains hydrophilic fibers. Examples of hydrophilic fibers include rayon, cotton, descaled wool, and regenerated cellulose. From the viewpoint of good hygroscopicity and hygroscopicity, the hydrophilic fiber is preferably rayon. The content of the hydrophilic fiber in the second sheet 2 is 20 to 90% by weight from the viewpoint of the hygroscopic property and the release property of the sheet 2.

  The second sheet 2 preferably includes hydrophobic fibers in addition to the hydrophilic fibers described above. This gives the second sheet 2 good skin feel as well as water absorption and moisture release properties. Examples of hydrophobic fibers include polyester fibers, polyamide fibers, polyolefin fibers, and the like. A polyolefin fiber containing ethylene, such as an ethylene propylene random copolymer fiber, is preferable from the viewpoint of excellent skin feel and strength. It is preferable that the content of the hydrophobic fiber in the second sheet 2 is 10 to 80% by weight from the viewpoint of balancing the hygroscopicity and release properties in the second sheet 2 with the skin feel.

From the viewpoint of improving skin feel as well as water absorption and moisture release properties, the second sheet 2 preferably contains 55 to 90% by weight of hydrophilic fibers and 10 to 45% by weight of hydrophobic fibers. The basis weight of the second sheet 2, 40~300g / m ² in terms of water absorption and moisture release and skin feel, particularly preferably 50 to 150 g / m ^2.

  The 2nd sheet | seat 2 is comprised from two types of layers, the 1st layer 2a distribute | arranged to the side which touches a body, and the 2nd layer 2b which touches the 1st sheet | seat 1, The 1st layer 2a which is the side which touches a body It is preferable that the hydrophilicity of is higher than the hydrophilicity of the second layer 2b. By configuring the second sheet 2 in such a configuration, there is an advantage that sweat on the body surface can be quickly absorbed. In particular, the first layer 2a preferably contains 90% by weight or more of hydrophilic fibers, and particularly preferably contains 100% (that is, the first layer 2a is particularly preferably composed of only hydrophilic fibers). The second layer 2b preferably contains 30 to 70% by weight of hydrophilic fibers and 30 to 70% by weight of hydrophobic fibers, 45 to 70% by weight of hydrophilic fibers, and 30 to 55% of hydrophobic fibers. More preferably, it is contained by weight.

The basis weight of the first layer 2a is 20 to 200 g / m ² , particularly 30 to 100 g / m ² , and the basis weight of the second layer 2b is 10 to 100 g / m ² , particularly 20 to 80 g / m ^2. Is preferable from the viewpoint of the softness and water absorption of the entire second sheet 2.

  It is preferable that the 1st layer 2a and the 2nd layer 2b are couple | bonded by the entanglement of the constituent fibers which comprise these layers. For example, the webs of the first layer 2a and the second layer 2b are manufactured by using a card machine, and both webs are manufactured by a water jet punching method (water needling method) using a high-pressure water flow in a state where both webs are overlapped. Both layers 2a and 2b can be combined by entanglement of the constituent fibers. Instead of this method, the constituent fibers of both webs can be entangled with each other by the needle punch method in a state where the webs of the first layer 2a and the second layer 2b are overlapped.

  In the 2nd sheet | seat 2, it is preferable that the 1st layer 2a is bulky and bulky, and the 2nd sheet | seat 2 whole is towel-like shape. This produces an advantage that the skin feel of the second sheet 2 becomes soft. In order to make the second sheet 2 having such a configuration, for example, after the first layer 2a and the second layer 2b are bonded, the second layer 2b is contracted by heat treatment, and thereby the first layer 2a is made to shrink. A method of forming a multi-shell shape can be used. In order to heat-shrink the second layer 2b, the layer 2b may contain heat-shrinkable fibers as the hydrophobic fibers described above. In particular, it is preferable to use a stretched ethylene propylene random copolymer fiber as the heat-shrinkable fiber because the second layer 2b is likely to be effectively shrunk to be multi-spiral.

  The present invention is not limited to the embodiment. For example, in the above embodiment, the bedding sheet 10 has a two-layer structure of the first sheet 1 and the second sheet 2, but if necessary, one or more sheets are laminated on the first sheet 1 side. May be.

  Hereinafter, the bedding sheet of the present invention will be described in more detail with reference to Examples and Comparative Examples.

[Example 1 and Comparative Examples 1 to 3]
Using the fiber material shown in Table 1, a sheet for bedding was manufactured by the following method.

[Production method of the first sheet]
Two types of polymers (PET and PP) that are not compatible with each other were melt-extruded simultaneously from the same spinning nozzle to obtain a nonwoven fabric. A high-pressure water stream was jetted onto this nonwoven fabric to separate and separate the PET fibers and PP fibers to obtain a first sheet. The first sheet had an air permeability of 7 cm ³ / cm ² · sec and a basis weight of 90 g / m ² . The specific surface area of the constituent fibers was 1.51 m ² / g. The first sheet was cut into a size of 10 cm × 10 cm, impregnated with 2 g of cedrol solution in which 5 g of cedrol was added to 95 g of ethanol and dissolved by stirring, and then dried at room temperature for 24 hours to carry cedrol. The supported amount was 10 g / m ² (Example 1). In Comparative Examples 1 to 3, a nonwoven fabric was obtained using only PP.

[Method for producing second sheet]
As the first layer, a card web having a rayon of 100% by weight and a basis weight of 38 g / m ² was produced. As the second layer, a card web having 50% by weight of rayon, 50% by weight of a stretched ethylene propylene random copolymer fiber, and a basis weight of 38 g / m ² was produced. Both webs were overlapped, and under these conditions, the constituent fibers of both webs were entangled and integrated by the water jet punch method. Next, the second layer was shrunk by dry heat treatment at 140 ° C. for 30 seconds to obtain a second sheet. In the second sheet, the first layer has a multi-walled shape due to the thermal contraction of the second layer, and the entire second sheet has a towel-like shape. The basis weight of the entire second sheet was 76 g / m ² (Example 1). In Comparative Example 1, a PET-like fiber was used instead of rayon, and a multi-tubular second sheet was produced by the same method. In Comparative Examples 2 and 3, two types of commercially available pillow cover materials were used. In Comparative Example 2, a pillow cover manufactured by Lofte Co., Ltd .: trade name # 2419 (a highly hygroscopic hydrophilic fiber manufactured by Kuraray Co., Ltd .: a sheet made of cotton with trade name “Sofista”) was used. In Comparative Example 3, a pillow cover made of 100% cotton manufactured by Fab The Home Co., Ltd .: trade name FH1112811 was used. The manufactured sheet was cut into a size of 10 cm × 10 cm and used.

[Method of manufacturing sheet for bedding]
A sheet for bedding was manufactured by superposing the first sheet and the second sheet and heat-sealing the outer periphery.

  About the sheet | seat for bedding obtained by the Example and the comparative example, the volatilization characteristic of the water absorption, moisture release, touch, and sedative essential oil component was evaluated with the following method. The results are shown in Table 2 below.

[Water absorption evaluation method]
The surface of the second sheet of the 10 cm × 10 cm bedding sheet was placed on a filter paper containing 5 ± 0.5 g of water. A load of 100 g was applied from above and allowed to stand for 5 seconds. Thereafter, the weight of the bedding sheet was measured, and the water / bedding sheet weight ratio was calculated from the increase in water. A larger weight ratio means higher water absorption. The filter paper manufactured by Whatman International Co., Ltd .: trade name 09-42 was cut into a size of 15 cm × 15 cm and used.

[Moisture release evaluation method]
The bedding sheet was cut into 10 cm × 10 cm, left in an environment room at 26 ° C./90 to 99% RH, and left until the water / bedding sheet weight ratio was saturated. Thereafter, the sheet was taken out from the environmental chamber, and the decrease in the weight ratio of the water / bedding sheet was measured over time. The slope of the decrease in the weight ratio per minute was defined as moisture release. The greater the slope, the higher the moisture release.

[Texture evaluation method]
The second sheet side of the bedding sheet was brought into contact with the cheeks, and the touch evaluation was performed. Subjects were 10 women in their 20s and 30s. Tactile evaluation has an evaluation score of 5 for likes, an evaluation score of 4 for likes, an evaluation score of 3 for neither, an evaluation score of 2 for dislikes, an evaluation score of 1 for dislikes, and an average of 10 people It was set as a touch evaluation value.

[Evaporation characteristics evaluation method]
The cedrol was supported on the first sheet so that the supported amount was 10 g / m ² by the method shown in the method for producing the first sheet. The size of the first sheet was 10 cm × 10 cm. Separately, two second sheets cut to 15 cm × 15 cm were overlapped, and the three surrounding sides were bonded by heat sealing to form a bag. The 1st sheet | seat was put into this bag, and it hung in the atmosphere in the environment of 25 degreeC / 50% RH. Under this condition, the weight was measured over time. Volatilization characteristics were evaluated by weight loss per day. The greater the weight loss, the higher the volatility properties. The second sheets of Example 1 and Comparative Example 1 were heat sealed after the second layers were combined. For Comparative Examples 2 and 3, the three surrounding sides were sewn.

  From the evaluation results shown in Table 2, it can be seen that the sheet for bedding of this example is superior in water absorption, moisture release, touch, and volatilization characteristics of cedrol that is solid at room temperature as compared with the sheet of the comparative example. It can be seen that the water absorption and volatilization properties are particularly excellent.

It is a schematic diagram which shows the cross section of one Embodiment of the sheet | seat for bedding of this invention.

Explanation of symbols

1 1st sheet 2 2nd sheet 2a 1st layer 2b 2nd layer

Claims (9)

  A bedding sheet comprising a first fiber sheet supporting a sedative essential oil component and a second fiber sheet containing 20 to 90% by weight of hydrophilic fibers, and the second fiber sheet being arranged on the side in contact with the body.   The bedding sheet according to claim 1, wherein the sedative essential oil component carried on the first fiber sheet is solid at room temperature.   The bedding sheet according to claim 1 or 2, wherein the sedative essential oil component carried on the first fiber sheet is monoterpene alcohol, sesquiterpene alcohol, or diterpene alcohol.   The bedding sheet according to any one of claims 1 to 3, wherein the hydrophilic fibers constituting the second fiber sheet contain rayon.   The bedding sheet according to claim 4, wherein the content of the rayon fiber of the hydrophilic fiber constituting the second fiber sheet is 20 to 90% by weight. The specific surface area of the constituent fibers of the first fiber sheet 0.9~3.0m ² / g, a basis weight of 20 to 200 g / m ^2, the basis weight of the second fiber sheet is 40~300g / m ² The sheet for bedding according to any one of claims 1 to 5. The bedding sheet according to any one of claims 1 to 6, wherein the first fiber sheet carries 0.1 to 30 g / m ² of a sedative essential oil component.   The second fiber sheet is composed of two layers each containing hydrophilic fibers, the first layer contains 90% by weight or more of hydrophilic fibers, and the second layer contains 30 to 70% by weight of hydrophilic fibers. The bedding sheet according to any one of claims 1 to 7, wherein the first layer is disposed on a side in contact with the body.   The 1st layer and the 2nd layer are combined by the entanglement of fibers, the 2nd layer is shrunk by heat treatment, the 1st layer is formed into a multi-wax shape, and the whole 2nd fiber sheet was made into towel cloth-like Item 9. A bedding sheet according to Item 8.

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