JP2002065407A - Mattress with excellent cushion property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mattress which is improved moisture retaining from user's sweat disperses uniformly a body pressure, has a good cushion property and air permeability, and is also easy to wash. SOLUTION: In a mattress, a soft layer is placed on a hard layer. The hard layer has a spring structure of continuous random loops made of polyester thermoplastic resin, the thickness of which is greater than or equal to 20 mm and less than or equal to 80 mm, and whose resilience when compressed to 50% is greater than or equal to 10 kgf and less than or equal to 30 kgf. The soft layer is made of fibers, the thickness of which is greater than or equal to 40 mm and less than or equal to 100 mm, and whose resilience when compressed to 50% is greater than or equal to 2 kgf and less than or equal to 6 kgf, in a state of containing 4% or more moisture. The amount of sinking of the layered mattress is greater than or equal to 20 mm to ensure the excellent cushion property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bedding for improving comfort in use. Furthermore, while using, there is no feeling of flooring and the concentration of body pressure is reduced,
The present invention relates to a bedding such as a bedding, a bed pad, a bed mattress and the like which is capable of maintaining a proper temperature and humidity in a bed and is washable and sanitary.

[0002]

2. Description of the Related Art Conventionally, there have been proposed many types of cotton bedding, wool cotton, polyester hard cotton, urethane foam, and bedclothes using these alone or in a laminate. The cotton, wool, and polyester cottons have a problem that the thickness is reduced during use and the fibers are loose. In particular, cotton,
Although wool cotton has moisture absorption and sweat absorption properties, there is a problem that moisture stays in the filling layer and the bedding becomes damp, which is not preferable in hygiene management. In addition, since they tend to be avoided from problems such as mite breeding and mold, they are often composed mainly of urethane foam or polyester cotton. On the other hand, when urethane foam or polyester cotton is used as the filling cotton, there is a problem that moisture absorption and sweat absorption are low and stuffiness is likely to occur. For this reason, improvements have been made to wrap polyester hard cotton as a filling by using a fiber material having hygroscopicity such as wool as a cotton wool.

[0003] On the other hand, Japanese Patent No. 2887648 proposes a humidity-controlled bedding provided with granular silica gel in a futon using cotton, synthetic fiber or the like. Also,
Japanese Patent Application Laid-Open No. Hei 6-316014 proposes a futon provided with a water absorbing / dehumidifying function by a sheet having a myriad of fine holes.

[0004] However, these methods have problems in the treatment of releasing the absorbed moisture and the falling off of the used particulate matter. Furthermore, there is a problem that the main focus is only on the hygroscopicity, and the dispersion of body pressure when used as a bedclothes is not considered. In addition, when any of the beddings is soiled, if it becomes dirty, washing is difficult and hygiene is insufficient.

[0005] On the other hand, air-mats which use air pressure as a cushioning material are used in bed beddings mainly for dispersing body pressure. However, there are cases where there is no moisture absorption, no water absorption, and there is a feeling of floating. Has the problem of causing seasickness. Therefore, a method of blowing air from the air mat surface has also been proposed, but in this method,
There is a problem that the bed is cold in winter and the bed is too dry. In addition, a driving unit for sending air is required,
In addition, there is a problem that if the control of the air pressure is insufficient, the dispersibility of the body pressure is impaired. A method of improving body pressure dispersibility by using low rebound urethane foam as a cushioning material has also been proposed, but urethane foam has poor moisture absorption and water absorption, is easily stuffy, has poor air permeability and drainability, and is dirty. There is a problem that it is difficult to wash. As described above, bedding excellent in both the body pressure dispersibility and the hygroscopic property for keeping the humidity in the bed comfortable has not yet been proposed, despite various studies. .

[0006]

DISCLOSURE OF THE INVENTION The present invention improves the drawback of the prior art in that moisture caused by sweat or the like during use stays in the bedding, and at the same time, has excellent body pressure dispersibility, cushioning properties, and ventilation. It is an object of the present invention to provide a bedding which also has a property and a washing property.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have made intensive studies and as a result have reached the present invention. That is, the present invention relates to a bedding in which a soft layer is laminated on a hard layer, and the thickness of the hard layer is 20 mm or more and 80 m or more.
m, a spring structure of a continuous linear random loop of polyester thermoplastic resin having a compression repulsion of 10 kgf or more and 30 kgf or less, the thickness of the soft layer is 40 mm or more and 100 mm or less, and the compression repulsion is 2 kgf or more and 6 kgf or less. In addition, the bedclothes are excellent in cushioning property and have a sinking amount of 20 mm or more in a laminated state. More specifically, the bedding and the soft layer are excellent in cushioning property as described above, wherein the apparent density of the hard layer is 0.1 g / cc or less and the air permeability is 40 cc / cm ² / sec or more. Consisting of aggregates, moisture content 4
% Or more, the bedding excellent in cushioning property described above, the basis weight of the hard layer is 1 kg / m ^{2 to} 4 kg / m ² , and the basis weight of the soft layer is 0.8 kg.
/ M ² or more and 2 kg / m ² or less, the bedding with excellent cushioning properties described above, wherein the soft layer can be separated from the hard layer, and the bedding with excellent cushioning properties as described above. The bedding and the bedding excellent in cushioning property described above, which have a waterproof resin layer on at least a part of the lower surface of the hard layer.

Hereinafter, embodiments of the present invention will be described in detail. The hard layer used in the present invention is cotton, hemp, coconut shell fiber, cellulosic fiber such as jute, wool,
It is a fiber aggregate formed into a single or mixed sheet of natural fibers such as protein fibers such as silk and feathers, and synthetic fibers made of a thermoplastic resin such as polyester, polyamide and polyolefin.

As the hard layer, it is possible to use hard cotton (fiber cushion) whose thickness and compression characteristics have been adjusted by blending cotton short fibers and low-melting adhesive fibers and then performing hot compression molding, and urethane foam mats. More preferably, it is possible to use a net-like structure made of a polyester-based thermoplastic resin in which random loops of continuous filaments made of 100% rubber-elastic thermoplastic elastomer are three-dimensionally spring-structured. The detailed structure and manufacturing method are described in JP-A-7-238456.

[0010] Since the net-like structure has a three-dimensional spring structure of a random loop composed of continuous filaments, it has a large gap penetrating between its upper and lower surfaces. Therefore,
When a net-like structure is used for bedding, air moves due to convection or pumping by turning over in the space between the body of the mattress user and the bottom of the bedding, dissipating heat and moisture. Can be suppressed.

It is desirable that the thickness of the hard layer is 20 mm to 80 mm. If the thickness is less than 20 mm, it is not preferable because a gap for air movement cannot be sufficiently maintained, and the thickness is not sufficient to support body pressure and a feeling of flooring is generated. On the other hand, if it exceeds 80 mm, the bed surface becomes too high when used as a bed mat, which is not preferable. The preferable range of the hard layer is 30 to 60 mm.

The apparent density of the hard layer is 0.02 g / cc.
To 0.07 g / cc. If the apparent density is less than 0.02 g / cc, resilience is lost and
If it exceeds 0.07 g / cc, it is unsuitable because the elasticity is increased, the sleeping comfort is deteriorated, and it becomes heavier without bending and the handleability is deteriorated. The preferred apparent density of the present invention is 0.03 to 0.0
6 g / cc.

The compression repulsion of the hard layer is 10 kgf or more and 30 k
It is desirably less than gf. If the compression repulsion is less than 10 kgf, it cannot accept the weight of the body and is unsuitable as a cushioning material for suppressing the feeling of flooring.

On the other hand, if the air permeability of the hard layer is low, the feeling of sleeping tends to be uncomfortable, and since it does not dry easily, there is a problem in hygiene and washing is difficult. Therefore, the air permeability is preferably 40 cc / cm ² / sec or more, and more preferably 50 cc / cm ² / sec or more.

The moisture content of the hard layer at 20 ° C. × 65% RH is preferably less than 1%, and the moisture content of the soft layer described later at 20 ° C. × 65% RH is 4%.
It is desirable that this is the case. That is, the difference in moisture content between the hard layer and the hard layer at 20 ° C. × 65% RH is preferably 3% or more. If the above conditions are not satisfied, the generated water (sweat) cannot be absorbed, especially when used for a long period of time, such as for nursing care, and furthermore, water retention occurs.

Further, around the hard layer, cellulosic fibers such as cotton, hemp, coconut shell fibers, and jute, wool,
Silk, natural fibers such as protein fibers such as feathers, synthetic fibers made of thermoplastic resin such as polyester, polyamide, and polyolefin, and hygroscopicity to these synthetic fibers,
It may be substantially wrapped by a fiber aggregate formed into a single or mixed sheet which has been processed for anti-mite and antibacterial properties.

[0017] The soft layer is a fiber aggregate,
Cellulose fibers such as hemp, coconut shell fiber, and jute,
Natural fibers such as protein fibers such as wool, silk, and feathers, and synthetic fibers made of thermoplastic resins such as polyester, polyamide, and polyolefin, and these synthetic fibers are subjected to processing such as moisture absorption, anti-mite properties, and antibacterial properties. A fiber aggregate formed into a single or mixed sheet can be used, and various fiber materials can be processed into a web or a nonwoven fabric. Further, the same type or different types of fibers may be mixed or laminated in sheet form as appropriate.

As the soft layer, sheet-like cotton in which conventional polyester staple fiber and low-melting-point adhesive fiber are blended and heat-compressed to adjust the thickness and compression characteristics, or other polyester material having hygroscopicity with polyester staple fiber is used. It can be used by mixing fibers or laminating in a sheet state, more preferably,
An acid having a vinyl group such as acrylic acid or methacrylic acid and / or an alkali metal salt thereof is graft-polymerized to a polyester fiber at a polymerization rate of 5% or more, and a terminal acidic group is used as an alkali metal salt. The contents are described in JP-A No. 12-45181.

It is desirable that the polyester staple fiber having hygroscopicity is used so that the moisture content of the soft layer at 20 ° C. × 65% RH is at least 4%. For example, when used with a mixture of ordinary polyester fibers, if the mixing ratio is low, sufficient moisture absorption performance cannot be obtained. Preferably, 50% or more is used.

When the hygroscopic polyester is used, it may be used as a sheet cotton mixed by blending with ordinary polyester staple fiber, or a sheet cotton made of only the hygroscopic polyester staple fiber and other cotton. May be laminated with the above-mentioned sheet-like cotton.

Further, in order to prevent the absorbed moisture from staying in the mattress for a long time, the soft layer and the hard layer are set at 20 ° C. × 65%
It is desirable that the difference in moisture content in RH is 3% or more.

The basis weight of the soft layer is from 0.8 kg / m ² to 2
kg / m ² is desirable. Weight is 0.8kg /
If it is less than m ^2, it is unsuitable as a cushioning material that accepts the body softly and disperses body pressure, and if it exceeds ² kg / m ² , it becomes unstable and makes it difficult to sleep. The preferred basis weight of the present invention is 1 kg / m ² to 1.5 kg / m ² .

On the other hand, if the thickness of the soft layer is less than 40 mm, the thickness is insufficient, and a feeling of flooring is generated, which is not preferable. On the other hand, if it exceeds 100 mm, it is not preferable because it may be too bulky or the stability at the time of use may be impaired. The preferred range of the thickness of the soft layer is 50 to 80 mm.

It is desirable that the compression rebound of the soft layer be 2 kgf or more and 6 kgf or less. If the compression repulsion exceeds 6 kgf, the body pressure is lacking when the body is laid down, and the body pressure is concentrated, which may cause bedsore in bedridden care recipients. If the compression repulsion is 2 kgf or less, a feeling of flooring will be produced. When the bedding is constituted by laminating a soft layer on a hard layer, it is desirable that the sinking amount is 20 mm or more.

In the present invention, as the thermoplastic fiber aggregate used for the hard layer and the soft layer, when the main material is a mixture of a fiber aggregate made of a polyester resin,
It is preferable to use a fiber aggregate made of the same polyester resin from the viewpoint of recyclability. In addition, when the bed bedding is used for nursing care, it is desirable to form a waterproof resin layer on the floor side of the side ground in order to protect the bed, the floor and the tatami from dirt such as urination. When the bedding becomes dirty, it is desirable that the soft layer and the hard layer can be removed for washing.

【Example】

Hereinafter, the present invention will be described with reference to examples. The measurement method used in this specification is as follows. (A) Thickness, basis weight, and apparent density The sample was measured for four heights at a load of 500 g with a metal plate having a diameter of 20 cm, and the average value was defined as the thickness.
Further, the weight of the sample was measured, the weight was divided by the area to determine the basis weight, and the apparent density was determined by dividing the basis weight by the thickness.

(C) Compression repulsion force According to JIS K6401, a diameter of 20 in Tensilon.
The displacement and repulsive force when compressed to 75% of the thickness with a metal plate of cm were measured. The repulsive force at a compressibility of 50% was read from the compression ratio-compression repulsion curve at this time.

(D) Air permeability A metal cylinder having an inner diameter of φ10 ° having a height sufficient to cover the thickness of a sample punched to a diameter of 10 cm is sealed with a compressive strain of 5% applied, and only the amount of the strain is added. After sealing with horizontal packing to prevent horizontal leakage,
The air permeability was measured using an air permeability meter manufactured by Techno World Co., Ltd., and this was defined as the air permeability. The differential pressure was 142 Pa.

(E) Moisture content About 10 g of a sample was weighed, and the sample was weighed in an absolutely dry state (M
0), the sample after humidity control for 8 hours at 20 ° C. × 65% RH was also weighed (M1). From these weights, ｛(M1
−M0) / M0｝ × 100 (%).

(F) Sleep Comfort and In-bed Climate The sample mattress was dried at 28 ° C. and 75% for 1 hour.
The humidity was adjusted in an environment of RH for 3 hours, and thereafter, the following evaluation was performed using the panel for 3 hours (n = 5). 1) Feeling of discomfort: Judgment was made based on the time until the subject felt discomfort while lying on a comforter (100% cotton towelet). 1 hour or more: ○, 30 minutes to 1 hour:
Δ, 30 minutes or less: × 2) Feeling of flooring: The degree of feeling of hitting the bottom with “Don” when sleeping was evaluated by subjective reporting. Not felt: ◎, almost felt: ○, slightly felt:
△, felt: × 3) Feeling of pressure: The feeling of pressure felt on the sacrum when sleeping was evaluated by subjective reporting. Not felt: ◎, almost felt: ○, slightly felt:
△, feel: × 4) Bed climate: The temperature and humidity in the bed were measured by a small temperature and humidity sensor attached to the back of the subject. (At 1 hour)

(G) Amount of sinking Based on the height when a metal plate having a diameter of 15 cm and a weight of 300 g is placed on the sample, the diameter is 15 cm and the weight is 13
The difference from the height when the metal plate of 00 cm was placed was defined as the sinking amount. (Example 1) As a hard layer, a network structure made of a polyester-based thermoplastic resin, "Breath Air" manufactured by Toyobo Co., Ltd.
(Apparent density 0.04 g / cc, thickness 35 mm, width 83
cm, length 191 cm). The soft layer is made of Toyobo's moisture-absorbing polyester staple fiber “Aqua Marble” 67.
%, And a sheet weight of 1500 g / m ² using 33% of regular polyester short fiber. These were constructed into mattresses using 100% cotton lining. The subject was laid down in an environment of 28 ° C. × 75% RH on the prepared futon, and the comfort was evaluated. As a result, they answered that the bedding had no feeling of flooring and sacral pressure, and did not feel uncomfortable even after 1 hour.

Example 2 A network structure made of a polyester thermoplastic resin as a hard layer, “Breath Air” manufactured by Toyobo Co., Ltd. (apparent density 0.045 g / cc, thickness 2)
0 mm, width 83 cm, length 191 cm). For the soft layer, sheet-like cotton having a basis weight of 500 g / m ² was produced from 100% of regular polyester staple fiber, and on top of that, a water-absorbent polyester staple “Aqua Marble” 1 manufactured by Toyobo Co., Ltd.
A sheet-like cotton having a basis weight of 500 g / m ² at 00% was laminated. These were constructed into mattresses using 100% cotton lining. Using the produced futon, the subject was laid down in the same manner as in Example 1 to evaluate the comfort. As a result, they answered that the bedding had no feeling of flooring and sacral pressure, and did not feel uncomfortable even after 1 hour.

(Example 3) The same hard layer as in Example 1 was used, and regular polyester short fibers 10 were used for the soft layer.
A sheet-like cotton having a basis weight of 500 g / m ² was prepared at 0%, and a sheet of cotton with a moisture-absorbing polyester staple fiber “Aqua Marble” manufactured by Toyobo Co., Ltd. having a basis weight of 1000 g / m ² was laminated at 100%. Was. These were constructed into mattresses using 100% cotton lining. A waterproof resin layer was formed by laminating a polyurethane film on a surface corresponding to the floor of the side lining. Using the produced futon, the subject was laid down in the same manner as in Example 1 to evaluate the comfort. As a result, the respondents answered that the bedding had no feeling of flooring and pressure on the sacrum, and did not feel uncomfortable even after 1 hour.

Example 4 As a hard layer, a network structure made of a polyester thermoplastic resin, "Breath Air" manufactured by Toyobo Co., Ltd. (apparent density 0.040 g / cc, thickness 5
0 mm, width 83 cm, length 191 cm). For the soft layer, sheet-like cotton having a basis weight of 500 g / m ² was prepared with 100% of regular polyester staple fiber, and on top of this, a moisture-absorbing polyester staple “Aqua Marble” 10 manufactured by Toyobo Co., Ltd.
A laminate of sheet-like cotton having a basis weight of 500 g / m ² at 0% was used. These were constructed into bed mattresses using a 100% cotton cover. Using the produced futon, the subject was laid down in the same manner as in Example 1 to evaluate the comfort. As a result, the respondents answered that the bedding had no feeling of flooring and pressure on the sacrum, and did not feel uncomfortable even after 1 hour.

Example 5 The same hard layer as in Example 1 was used, and the soft layer was made of regular polyester short fiber 10
A sheet of cotton having a basis weight of 1000 g / m ² using 0% was used. These were constructed into mattresses using 100% cotton lining. The subject was laid down in an environment of 28 ° C. × 75% RH and the comfort was evaluated. Result is,
30 minutes ~, although I do not feel a feeling of flooring and pressure on the sacrum
The answer was that the bedding had a slight feeling of discomfort in one hour.

(Comparative Example 1) The same hard layer as in Example 1 was used, and the soft layer used was 50% of a moisture-absorbing polyester staple fiber "Aqua Marble" manufactured by Toyobo Co., Ltd. and 50% of a regular polyester staple fiber. / M ² of sheet cotton. These were constructed into mattresses using 100% cotton lining. Using the produced futon, the subject was laid down under the same conditions as in Example 1 and the comfort was evaluated. The result was that the bedding had a feeling of flooring and a feeling of pressure on the sacrum, even though it was not more than one hour.

(Comparative Example 2) The same hard layer as in Example 1 was used, and the soft layer used was 50% of absorptive polyester staple fiber "Aqua Marble" manufactured by Toyobo Co., Ltd. and 50% of regular polyester staple fiber. / M ² of sheet cotton. These were used as mattresses using the side fabrics produced in Comparative Example 1. Using the produced futon, the subject was laid down under the same conditions as in Example 1 and the comfort was evaluated.
As a result, they answered that the bedding had no floor feeling and no swelling feeling but felt strongly the pressure on the sacrum.

Comparative Example 3 As a hard layer, a network structure made of a polyester thermoplastic resin, "Breath Air" manufactured by Toyobo Co., Ltd. (apparent density 0.050 g / cc, thickness 8)
0 mm, width 83 cm, length 191 cm). For the soft layer, 5% water-absorbent polyester staple fiber “Aqua Marble” manufactured by Toyobo Co., Ltd., regular polyester staple fiber 9
A sheet-like cotton having a basis weight of 1000 g / m ² using 5% was used. These were constructed into mattresses using 100% cotton lining. Using the produced futon, the subject was laid down under the same conditions as in Example 1 and the comfort was evaluated. The result was that the bedding had a slight feeling of swelling, a feeling of flooring, and a slight feeling of pressure on the sacrum.

Comparative Example 4 Polyurethane foam as a hard layer (apparent density 0.08 g / cc, thickness 40 m)
m, width 80 cm, length 190 cm). The soft layer has the same configuration as in the first embodiment. 100% cotton
The mattress was constructed using the side lands. The subject was laid down under the same conditions as in Example 1 to evaluate the comfort. As a result, there was no feeling of oppression, but there was a slight feeling of flooring, and the answer was that the bedding had a feeling of discomfort within 30 minutes to 1 hour. Table 1 shows the physical properties and evaluation results of the hard layer and the soft layer in each of the above examples and comparative examples.

[0040]

[Table 1]

[0041]

The bedding of the present invention is obtained by laminating a network structure made of a thermoplastic elastic resin having excellent cushioning properties and air permeability, and a polyester fiber aggregate having excellent body pressure dispersibility and moisture absorption properties. Things. This is a major factor in bedsores, which improves the disadvantages of heat storage and perspiration caused by perspiration during use in hot environments and stays in the bedding, keeps the bed comfortable, and poses a problem at the point of care. A bedding that reduces the concentration of certain body pressure.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the structure of an example of the bedding of the present invention.

FIG. 2 is a sectional view showing an example of a structure of a soft layer (1) in FIG.

[Explanation of symbols]

1: soft layer, 2: hard layer, 3: side lining, 4: hygroscopic polyester layer, 5: regular polyester layer

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takehiko Oura F-term (reference) 3B096 AD04 BA00

Claims (6)

[Claims] 1. A bed bedding having a soft layer laminated on a hard layer, wherein the hard layer has a thickness of 20 mm or more and 80 mm or more.
mm, a 50% compression repulsion force is 10 kgf or more and 30 kgf or less, and has a continuous linear random loop spring structure of a polyester thermoplastic resin.
mm to 100 mm, 50% compression rebound is 2 kgf or more and 6 kgf or less, and the sinking amount in a laminated state is 2
Bedding excellent in cushioning characteristic characterized by being 0 mm or more. 2. The hard layer has an apparent density of 0.1 g / cc.
^{2. The} bedding excellent in cushioning property according to claim 1, wherein the air permeability is 40 cc / cm ² / sec or more. 3. The bedding excellent in cushioning property according to claim 1, wherein the soft layer is made of a fiber aggregate and has a moisture content of 4% or more. 4. The basis weight of the hard layer is 1 kg / m ² or more and 4 k
g / m ² or less, and the basis weight of the soft layer is 0.8 kg / m <sup>2
2. The</sup> pressure is ² kg / m ² or less.
Bedding with excellent cushioning properties as described. 5. The bedding excellent in cushioning property according to claim 1, wherein the soft layer is separable from the hard layer. 6. The bedding excellent in cushioning property according to claim 1, wherein a waterproof resin layer is provided on at least a part of the lower surface of the hard layer.