JP2015107300A - Pillow granular filler, and pillow for bedding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pillow granular filler having flowability appropriately along the shape of the head of a user in a state of being filled in a pillow, and keeping a pillow temperature at a comfortable low temperature equal to or less than an extended period body temperature by the cold insulation effect of a latent heat storage material held in a hollow grain body.SOLUTION: A pillow granular filler is obtained by: forming a resin granular filler to be filled in a pillow for bedding from an aggregate of a spherical shell-shaped hollow grain body 1 having an opening 1a and a wall thickness of 0.1-0.5 mm; holding in a dispersion state, 5-30 mass% of microcapsule powder 2 including a paraffin latent heat storage material of 22-37°C melting point and having a grain diameter of 1-100 μm, in resin forming the hollow grain body 1; and if necessary, holding a microcapsule including flavor such as cypress aromatic oil. The pillow for bedding is filled with the pillow granular filler.

Description

  The present invention relates to a pillow-shaped filler for filling a pillow and a pillow for bedding using the same so that the pillow of the bedding can provide cushioning and other comfortable feeling.

  In general, as a granular filler for pillows that gives cushioning and other comfortable feeling to the pillow for bedding, a filler in a pipe (cylinder) shape, spherical shape and other known granular forms (also referred to as a staff member). It has been known.

  As such a filling material for pillows, the applicant of the present application stated in the utility model registration gazette of the earlier application that “the staff material for pillows molded from soft plastic or elastomer, and the staff material has an opening in the peripheral wall. Having a hollow and thin spherical shell inside ”(Patent Document 1, Patent Document 2).

  In addition, a pillow is known in which a cooled solid latent heat storage material is accommodated in a part of the surface of the pillow, and heat is absorbed by the latent heat storage material so that the cold insulation effect lasts for a long time ( Patent Document 3).

  Moreover, it is an elastic foam containing microcapsules enclosing a latent heat storage material, and it is known to use, for example, polyurethane foam, NBR (acrylonitrile butadiene) foam for bedding (Patent Document 4, Claim) 1, claim 4, claim 5, paragraph [0011]).

Utility Model Registration No. 2516449 Utility Model Registration No. 3117850 JP 2008-289705 A JP 2007-332201 A

  However, among the above-described conventional techniques, the stuff material made of a hollow spherical shell body described in Patent Documents 1 and 2 has a cooling effect due to ventilation, but a heat storage action and a cooling action. It was not possible to make a pillow filling material that could be cooled to a temperature lower than the user's body temperature.

  In addition, when a part of the surface of the pillow is formed with the latent heat storage material described in Patent Document 3, the surface of the pillow is a solid that has no flexibility and cushioning properties. Since the surface of this is not deformable along the shape of the head, there is a problem that the heat conduction efficiency is not good.

  In addition, the elastic foam described in Patent Document 4 is an elastic foam containing microcapsules enclosing a latent heat storage material, because only a small amount of latent heat storage material present in the surface layer acts, Even when used as a bedding on a pillow, the cooling effect did not last comfortably for a long time.

  Accordingly, the problem of the present invention is to solve the above-mentioned problems and to have fluidity that appropriately conforms to the shape of the user's head while the granular filler for pillow is packed in the pillow. On the other hand, the cooling effect of the latent heat storage material is to act over time for a long time, whereby the temperature of the pillow can be maintained at a comfortable low temperature below body temperature for a long time.

  In order to solve the above-mentioned problems, in the present invention, the resin comprises a collection of resin-made hollow particles filled in a pillow of bedding, and the resin forming the hollow particles has a melting point of 22 to 37 ° C. It was made into the granular filler for pillows characterized by hold | maintaining the microcapsule powder which encloses a paraffin-type latent heat storage material in the dispersion state.

  The granular filler for bedding pillows according to the present invention configured as described above has fluidity due to the granular shape of the aggregate of resin hollow particles, and matches the orientation and height of the user's head. As a result, the surface shape of the pillow changes, and a large number of hollow particles approach in a wide area along the shape of the head, so that the heat conduction efficiency with respect to the head becomes good.

  In addition, hollow particles absorb the amount of heat from the outside when the latent heat storage material in powdered microcapsules that are dispersed and held is cooled in advance to a temperature lower than human body temperature (35 to 37 ° C.). Then, it melts from the solid state and changes to a liquid phase, and the user's head is cooled with heat of fusion.

  The resin hollow particles preferably have a granular shell wall with a wall thickness of 0.1 to 0.5 mm. If the thickness is within this range, the paraffin-based latent heat storage material encapsulated in the microcapsule powder having a predetermined particle size dispersed in the resin is buffered through the resin and indirectly heat is transferred to the user. A pleasant cool feeling can be continuously given to the head.

  Further, if the hollow particle is a spherical shell-shaped hollow particle or a cylindrical hollow particle having one or more openings in a shell wall having a predetermined thickness, the resin hollow particle is easily elastically deformed. It becomes a filler with good cushioning properties, and also has a heat dissipation action due to the air flowability inside the aggregate of hollow particles, so that the cooling effect of the latent heat storage material is further sustained.

  In order to disperse and hold the microcapsule powder in the shell wall of the thin hollow particle as described above, and to perform the heat storage effect as efficiently as possible, the microcapsule powder has a particle size of 1 to 100 μm. It is preferable to maintain the dispersion as uniformly as possible.

  Moreover, in order to perform a heat storage effect more efficiently, it is preferable to mix 5-30 mass% of said microcapsule powder in 100 mass% of resin.

  If a pillow for bedding is formed by filling the above-mentioned granular filler for pillow, the temperature of the pillow can be maintained at a comfortable low temperature below body temperature for a long time.

  A microencapsulated fragrance may be held inside or on the surface of the hollow particles, and the fragrance may be a fragrance containing an essential oil obtained from cedar or cypress.

  The present invention is a granular filler for pillows made of an aggregate of resin hollow particles in which microcapsule powder containing a paraffin-based latent heat storage material having a melting point of 22 to 37 ° C. is held in a dispersed state. The fluidity of the granular packing material for pillows packed in is well adapted to the shape of the user's head, and provides a sufficient cooling effect for the user for a long time, and the pillow temperature is comfortable for a long time. There is an advantage that it can be maintained at a low temperature below the body temperature.

  In addition, the pillow for bedding filled with such a granular filler for pillows can maintain the temperature of the pillow at a low temperature below body temperature for a long time, and has a cold insulation function that can be used comfortably for a long time during fever and summer use. There is an advantage of becoming a pillow.

Partially sectional front view showing a spherical shell-like hollow granule of an embodiment (A) The perspective view which shows the cylindrical hollow particle of embodiment, (b) Sectional drawing of the cubic hollow particle of embodiment, (c) Sectional drawing of the pentagonal cylindrical hollow particle of embodiment The perspective view which partially cuts and shows the pillow for bedding filled with embodiment shown in FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIGS. 1 and 3, in the embodiment, a resin granular filler filled in a pillow of a bedding is constituted by an aggregate of spherical shell-shaped hollow particles 1 having an opening 1 a, and this hollow This is a granular filler for pillows in which microcapsule powder 2 containing a paraffin-based latent heat storage material having a melting point of 22 to 37 ° C. is held in a dispersed state in the resin forming the granules 1.

  As shown in FIG. 3, the particulate filler 1 is filled with an appropriate amount so that the inner bag 3 having good air permeability, such as a mesh fabric, has an appropriate fluidity, and further covered with a cloth outer bag 4. It is used as a pillow A, and spreads so as to wrap around the lower part of the head along the shape of the user's head by appropriate flow of the whole or a part of the aggregate of the individual hollow particles 1. The contact area is widened so that the head can be supported with low pressure, that is, a comfortable feeling of use can be obtained.

  The microcapsule powder 2 used in the present invention contains a paraffin-based latent heat storage material having a predetermined melting point and is liquid at normal temperature as paraffin having an appropriate melting point of 22 to 37 ° C. Liquid paraffin which is a mixture of cyclic (naphthenic) alkane saturated hydrocarbons having 17 to 20 carbon atoms can be used.

  Since the low melting point paraffin-based latent heat storage material having a temperature lower than the predetermined melting point temperature range may be melted at a room temperature of less than 22 ° C. before using the pillow, the cooling function is lost before the pillow is used. It is not preferable. In addition, paraffin-based latent heat storage materials having a high melting point exceeding 37 ° C. cannot perform a cooling function unless the user's body temperature (body surface temperature) exceeds at least 37 ° C., so cooling is performed at a normal body temperature of about 36 ° C. This is not preferable because the function cannot be sufficiently exhibited. In consideration of use conditions in a relatively high temperature room such as summer, it is preferable to use a paraffin-based latent heat storage material having a melting point of 29 ° C. or higher (37 ° C. or lower).

  As the paraffin-based latent heat storage material having such a melting point, so-called liquid paraffin can be exemplified, but they are also called a mixture of alkyl naphthene hydrocarbons, and a fraction of engine oil from a spindle oil having a boiling point of 330 to 390 ° C. by distillation of crude oil. It is obtained by removing unsaturated hydrocarbons and aromatic hydrocarbons by solvent extraction or hydrogenation, repeatedly purifying with fuming sulfuric acid, neutralizing, and adsorbing with activated alumina or the like.

  Liquid paraffin made from such paraffin-based crude oil is usually composed mainly of a chain alkane having about 15 to 20 carbon atoms, but if it is made from naphthenic crude oil, It is good also considering the carbon number cycloalkane as a main component.

The microcapsules enclosing the paraffin-based latent heat storage material can be manufactured by a well-known microencapsulation technique using a film-forming material made of a resin such as a melamine resin or other polymer by an in-situ polymerization method. Microencapsulation is possible by the manufacturing method described in Patent Document 4.
More specifically, it is a method of making a capsule film by heat treatment using the fact that the melamine resin is thermosetting, and as the material of the capsule, urea or melamine-formaldehyde resin or a prepolymer thereof may be used. it can.

  More specifically, a prepolymer aqueous solution of a mixture from monomethylolmelamine to hexamethylolmelamine is obtained by reacting melamine and formaldehyde by heating (50 to 80 ° C.) with an alkaline aqueous solution (pH 8 to 10). . Then, this solution is added to the weakly acidic O / W emulsion and heated and stirred in a weakly acidic region (pH 3 to 6), whereby a polymer is deposited on the interface of the O / W emulsion to obtain microcapsules. Can do.

  The microcapsule powder preferably has a particle size of 1 to 100 μm so that it can be dispersed and held as uniformly as possible in a resin having a predetermined thickness. In the microcapsule powder having a particle size less than the predetermined range, secondary particles are often formed in the resin, and it is not easy to uniformly disperse. It is because the quantity with which the thickness 0.1-0.5 mm is filled decreases on the contrary, and the efficiency of heat storage may fall. From such a tendency, a more preferable particle size is 5 to 40 μm, and further preferably a particle size is 10 to 30 μm.

  Next, a granular filler is obtained by kneading a predetermined amount of such microcapsule powder into a resin for forming a hollow particle such as polyethylene and forming it. As a molding method, extrusion molding, hollow molding (blow molding, vacuum molding), injection molding, and other molding methods suitable for the resin to be used can be employed.

  The resin that forms the hollow particles is preferably a synthetic resin that is reasonably flexible and elastically deformed. For example, soft polyethylene, ethylene vinyl alcohol (EVA) resin, other polyolefin resins, urethane resins, silicone resins, thermoplastics Examples include elastomer resins including elastomers and other rubbers, copolymers of these various polymers, and compositions in which two or more are mixed.

  The amount of the microcapsule powder added to such a resin material is preferably 5 to 30% by mass. If the amount is less than the predetermined amount, the aggregate of hollow particles cannot sufficiently exhibit heat storage properties, and it becomes difficult to obtain a sufficient cooling sensation. This is because the improvement of the cooling effect is not recognized, and the efficiency of addition is lowered and the practicality is lowered. From such a tendency, the more preferable addition amount of the microcapsule powder is 10 to 25% by mass, and usually 15 to 20% by mass is added as a guideline to obtain a preferable result.

In addition, for example, a fragrance microencapsulated in the resin material may be added to form a fragranced hollow particle so that the fragrance microcapsulated is held inside or on the surface of the hollow particle. .
The types of the above-mentioned fragrances may be adopted according to the consumer's preference and purpose of use, and are not usually limited, and one or more fragrances composed of natural fragrances or synthetic fragrances are used alone, or Two or more types can be used in combination.
For example, if a fragrance containing an essential oil obtained from cedar or cypress is employed, a granular filler for pillows that exhibits deodorant properties, sedation properties, antibacterial properties, aroma effects and other known functions as in the examples described later. Is obtained.

  Among the above fragrances, as specific examples of natural fragrances, musk, civet, ambergris, etc. well-known as animal fragrances, vegetable fragrances extracted from trees, flowers, fruits, etc. In addition, other well-known natural fragrances can be mentioned, and terpenes and aromatic components contained in such natural fragrances can be chemically synthesized, for example, well-known synthetic fragrances such as hinokitiol and eugenol.

  Note that the microencapsulated fragrance can be manufactured by a well-known microencapsulation technique in the same manner as described above, and only the fragrance is included in the production of the microcapsule and does not contain a paraffin-based latent heat storage material. The paraffin-based latent heat storage material and the fragrance may be used in combination. For example, a mixture of microcapsule powders containing each of these components may be used.

  The microencapsulated fragrance may be kneaded into the resin material for forming the hollow particles, and the liquid prepared by using a resin binder or the like is applied to the surface of the hollow particles formed in advance, It may be coated.

  Such a microencapsulated fragrance has sustained release properties by being microencapsulated, and particularly when kneaded into a resin material to form a hollow granule, it has a length of 4 to 6 months or more. Sustained release that emits a fragrance felt over a period of time can be obtained.

  For example, the spherical shell-shaped hollow particles 1 shown in FIG. 1 can be adopted as the shape of the hollow particles for holding the paraffin-based latent heat storage material or the fragrance or the mixture of the microcapsule powders containing them. ) As shown in FIG. 5B, a substantially cubic hollow particle 6 shown in a sectional view in FIG. 2B, and a pentagonal hollow particle 7 shown in a sectional view in FIG. It may be. Reference numerals 5a, 6a, and 7a in the figure indicate openings formed in sizes that allow air to flow.

The opening 1a of the spherical shell-shaped hollow granule 1 shown in FIG. 1 has been shown to open and penetrate two places on a pair of opposing surfaces, but considering that it has the required air flowability, What is necessary is just to decide the magnitude | size and position. The formation positions, number, and size of the openings 5a, 6a, and 7a shown in FIGS. 2A, 2B, and 2C can be similarly arranged or formed. These openings 1a, 5a, 6a, and 7a are hollow and thin-walled so that the hollow particles 1 are not deformed when the internal air expands and contracts, and heat dissipation It is preferable to form it in order to enhance heat transfer during cooling.
The opening can be provided by the above-described molding, or by processing after molding, for example, cutting for individually separating hollow particles formed by joining, or perforation for individual or continuous hollow particles, It can be formed by a notch or the like.

  Examples of the hollow particles shown in the figure are representative, and other examples include oval, elliptical sphere, rectangular parallelepiped, tetrahedron, other polyhedron, triangular cylinder, square cylinder, and other It may be a polygonal cylinder, other known polyhedrons or cylinders, and one formed with a size capable of circulating air through one or more openings.

  The hollow particles are preferably hollow particles having a wall thickness of 0.1 to 0.5 mm. This is because if the wall thickness is less than the predetermined range, it is difficult to disperse and hold a relatively large microcapsule powder at a sufficient density in the range of the particle diameter, and the cooling effect may not be sufficiently exhibited. It is not preferable. Further, if a thick granular shell wall exceeding the predetermined range is formed, the heat transfer efficiency is deteriorated from the outside to the internal microcapsule powder, and a cooling effect cannot be obtained sufficiently, which is not preferable.

  The size of such hollow particles may be set so that the pillow has a moderate fluidity in a state filled in a pillow, and the surface of the pillow is recessed as smoothly as possible along the shape of the person's head. Although the necessity to limit is not recognized, for example, the particle diameter of the maximum diameter portion is about 5 to 20 mm, preferably about 10 to 15 mm, and a preferable feeling of use is obtained.

[Example 1]
As a spherical shell-like hollow particle body 1 shown in FIG. 1, a polyethylene tube in which 20% by mass of a microcapsule having a particle diameter of 10 μm containing a paraffin wax having a melting point of 32 ° C. is extruded and molded to form a cylindrical tube body. Formed and vacuum formed to form a skewer bar-shaped rod shape with a “spherical part” and a “necked part” formed to have an outer diameter of 11.5 mm, an opening diameter of 5.5 mm, and a wall thickness of 0.5 mm By forming a body and then cutting the “necked portion”, a spherical shell-shaped hollow particle body 1 having an opening portion formed at a spherical opposing position was manufactured.

In this way, a large number of spherical shell-shaped hollow particles 1 were efficiently formed, and the aggregate was filled into the inner bag 3 of the pillow having the shape shown in FIG. 3 to form a pillow A for bedding.
The obtained pillow A for bedding can maintain the surface temperature of the pillow below about 32 ° C. for 5 hours when an adult uses it as a pillow in a room at 27 ° C. Everyone was able to sleep comfortably. As a result, it was recognized that the obtained pillow A for bedding is a pillow that can provide a sufficiently comfortable use feeling even when the human is fever and in the summer when the temperature is around 30 ° C.

[Example 2]
When producing the spherical shell-shaped hollow granule 1 of Example 1, 20% by mass of a 10 μm particle size microcapsule containing a paraffin wax having a melting point of 28 ° C. was kneaded, and a natural fragrance (hiba aromatic oil) was added. Hollow particles 1 containing 0.4% by mass of natural fragrance were produced by kneading 3% by mass of microcapsules having a particle size of 50 μm.
In this way, a large number of spherical shell-shaped hollow particles 1 were formed, and the aggregate was filled in the pillow inner bag 3 having the shape shown in FIG.

  The obtained bedding pillow A can maintain the temperature of the pillow at about 32 ° C. or less for about 5 hours in the same manner as in Example 1, and has stabilized natural fragrance in the temperature range below the human body temperature. Since it can be volatilized at a speed, it is possible to continuously float a faint scent around the pillow A for bedding. When this pillow was tested for use, it was used indoors at a room temperature of about 27 ° C. All 10 subjects were able to sleep comfortably.

  As a result, the pillow A for bedding obtained is sufficiently fragrant due to a stable amount of natural fragrance when used for cooling the head or the like in the summer when the user generates heat. Furthermore, the usefulness of the essential oil component encapsulated in the microcapsule is, for example, a pillow that provides a comfortable feeling of use while receiving various known actions such as deodorization, sedation, antibacterial activity, aroma effect, etc. Admitted.

DESCRIPTION OF SYMBOLS 1 Spherical shell-shaped hollow particle 1a, 5a, 6a, 7a Opening part 2 Microcapsule powder 3 Inner bag 4 Outer bag 5 Cylindrical hollow particle 6 Substantially cubic hollow particle 7 Pentagonal hollow particle A pillow

Claims (8)

  It consists of a collection of resin-made hollow particles filled in the pillow of the bedding, and a microcapsule powder containing a paraffin-based latent heat storage material having a melting point of 22 to 37 ° C. is added to the resin forming the hollow particles A granular filler for pillows, which is held in a dispersed state.   The granular filler for pillows according to claim 1, wherein the hollow particles are hollow particles having a wall thickness of 0.1 to 0.5 mm of a granular shell wall.   The granular filler for pillows according to claim 1 or 2, wherein the hollow particles are cylindrical hollow particles or spherical shell-shaped hollow particles having one or more openings.   The granular filler for pillows according to any one of claims 1 to 3, wherein the microcapsule powder is a microcapsule powder having a particle diameter of 1 to 100 µm.   The granular filler for pillows according to any one of claims 1 to 4, wherein the microcapsule powder is added in an amount of 5 to 30% by mass in the resin.   The granular filler for pillows according to any one of claims 1 to 3, wherein a perfume that is microencapsulated is held in or inside the hollow particles.   The granular filler for pillows according to claim 6, wherein the fragrance is a fragrance containing an essential oil obtained from cedar or cypress.   A pillow for bedding formed by filling the granular filler for pillow according to any one of claims 1 to 7.

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