JP3231460U - Stuffing for clothing, cushions, pillows or duvets, as well as pillows and duvets - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stuffing for clothes, cushions, pillows or futons made of a thermoplastic resin foam composite aggregate having excellent bulk retention and good drainage when washed while having softness, heat retention and the like. To do. SOLUTION: A thermoplastic resin foam obtained by mixing a thermoplastic resin foam string X having a bulkiness of 20 to 60 mm and a thermoplastic resin foam piece Y having a bulk density of 0.01 to 0.05 g / cm3. A padding for clothing, cushions, pillows or duvets made of composite assembly 1, wherein the weight ratio of the thermoplastic resin foam string to the thermoplastic resin foam pieces is 10:90 to 40:60, and the bulk density is high. Is 0.01 to 0.03 g / cm3. [Selection diagram] Fig. 1

Description

The present invention relates to a thermoplastic resin foam composite aggregate that can be suitably used as a padding for pillows, futons, and the like.

Feathers that are light, soft, and have excellent heat retention are waterfowl hairs, and in recent years, they have been difficult to collect from the viewpoint of protecting birds and beasts. In addition, the supply of feathers, which is a natural material, is not stable due to factors such as climate and illness, the price fluctuates sharply, and the market price is unstable.
In order to deal with this, instead of natural materials such as feathers, as an inner material to be packed in clothing such as down jackets, bedding such as duvets, pillows and mattresses, outdoor equipment such as sleeping bags, and furniture such as sofas, chairs and cushions. Nowadays, synthetic cotton is also widely used. As a material for synthetic fiber cotton, polyamide, polyester, acrylic, polyvinyl alcohol, polypropylene, polyethylene and the like are well known. Synthetic fiber cotton composed of a collection of these fine synthetic fibers retains air between the fibers, and the air between the fibers ensures heat retention and flexibility.

On the other hand, synthetic resin foam is widely used as a cushioning material for protecting the article during storage and transportation of the article. Common base resins for synthetic resin foams are polyurethane, polystyrene, and polyolefins (mainly polyethylene and polypropylene). In addition, phenol resins, polyvinyl chlorides, urea resins, silicones, polyimides, melamine resins and the like are also foamed and used in applications that take advantage of their respective characteristics.

Synthetic resin foams are usually produced by a method of mixing air bubbles, a method of using a foaming agent, a solvent aeration method, a method of generating gas by a chemical reaction, etc., and such synthetic resin foams are cut. It has also been proposed to use a string-like or thread (fiber) -like material as a cushioning material.

For example, Patent Document 1 proposes a string-shaped cushion body having excellent heat retention while having advantages of conventional synthetic fiber cotton being lightweight and relatively inexpensive. This is a cushion body formed by collecting a large number of string-like objects formed by punching or cutting a synthetic resin foam sheet, and the synthetic resin foam sheet has an average number of bubbles of 350 cells / cm ³ or more, and is apparent. The density is 10 to 60 g / L, the average thickness is 0.1 to 5.0 mm, the thickness has a striped variation, and the width is 0.1 to 5.0 mm due to the cutting of the synthetic resin foam sheet. , A cushion body formed on a string having a length of 10 mm or more.

Further, Patent Document 2 proposes a synthetic resin foam fiber having a porous layer. In this method, a porous layer is formed of a highly restorable polyolefin resin, pores of the porous layer are opened on the surface of each fiber, and a large number of small recesses are formed on the surface of the fiber, and the upper and lower non-exposed surfaces are formed. Proposes one in which those holes are not exposed and are configured to be exposed on the side surface, and one in which all or almost all of the holes are open to the outside.

Japanese Unexamined Patent Publication No. 2014-180460 Japanese Unexamined Patent Publication No. 2015-158022

However, the synthetic resin foamed string-like material formed by finely cutting the synthetic resin foamed sheet described in Patent Documents 1 and 2 into a string shape or a thread shape has an open cell structure and is therefore bulky depending on the application. Sometimes it was difficult to maintain. Further, the string-like material has high water absorption and water retention due to the open cell structure. For example, when the synthetic resin foam string-like material is used as a pillow filling and the pillow is washed from the viewpoint of hygiene, it is washed and dehydrated. Since the subsequent water content tends to increase and it takes time to dry depending on the conditions of dehydration and drying, there is room for further improvement in drainage.

The present invention has been made in view of the actual situation of the above-mentioned background technology, and its purpose is to have softness, heat retention, etc., excellent bulk retention, and good drainage when washed. , To propose a thermoplastic resin foam composite aggregate.

In order to achieve the above-mentioned object, the present invention has the thermoplastic resin foam composite aggregate, the padding, and the pillow and the futon described in the following [1] to [10].
[1] A composite assembly of a thermoplastic resin foam obtained by mixing a thermoplastic resin foam string having a bulkiness of 20 to 60 mm and a thermoplastic resin foam piece having a bulk density of 0.01 to 0.05 g / cm ^3. The body
The weight ratio of the thermoplastic resin foam string to the thermoplastic resin foam piece is 10:90 to 40:60.
The bulk density of the thermoplastic resin foam composite aggregate is 0.01 to 0.03 g / cm ³ .
Thermoplastic resin foam composite aggregate.
[2] The thermoplastic resin foam composite aggregate according to the above [1], wherein the base resin of the thermoplastic resin foamed string is a polyolefin resin having a flexural modulus of 400 MPa or less.
[3] The base resin of the thermoplastic resin foam piece is any one of a polyolefin resin, a polystyrene resin, and a composite resin of a polyolefin resin and a polystyrene resin. The thermoplastic resin foam composite aggregate according to [2].
[4] The thermoplastic resin foam composite aggregate according to any one of the above [1] to [3], wherein the length of the thermoplastic resin foamed string-like material is 10 to 50 mm.
[5] The thermoplastic resin foam composite aggregate according to any one of the above [1] to [4], wherein the maximum diameter of the thermoplastic resin foam piece is 0.5 to 10 mm.
[6] The thermoplastic resin foam composite aggregate according to any one of [1] to [5] above, wherein the thermoplastic resin foam pieces are non-crosslinked polyethylene-based resin foam particles.
[7] A padding for clothing, cushions, pillows or duvets, which comprises the thermoplastic resin foam composite aggregate according to any one of the above [1] to [6].
[8] Clothes, cushions, pillows, or the like, wherein the thermoplastic resin foam composite aggregate according to any one of the above [1] to [6] is packed in a bag having a large number of holes. Stuffing for futons.
[9] A pillow characterized by being filled with the filling according to the above [7] or [8].
[10] A futon characterized by being filled with the filling according to the above [7] or [8].

The above-mentioned thermoplastic resin foam composite aggregate of the present invention has excellent bulk retention while having softness, heat retention and the like, and has good drainage when washed. Therefore, the thermoplastic resin foam composite aggregate of the present invention can be suitably used as a padding for pillows, futons, and the like. In addition, since it is a thermoplastic resin product, the supply amount is stable compared to natural feathers regardless of the factors of weather and illness, which can lead to stable market price.

It is a figure which conceptually showed a part of the thermoplastic resin foam composite aggregate which concerns on this invention. It is an enlarged perspective view which conceptually showed a part of the thermoplastic resin foam string-like material used in this invention. It is a figure which showed an example of the manufacturing method of the thermoplastic resin foam string used in this invention, and (a) is the perspective view which conceptually showed the process of cutting a thermoplastic resin foam sheet into a strip shape. (B) is a perspective view which conceptually showed the process of further cutting a strip-shaped body into a thermoplastic resin foam string-like material.

Hereinafter, the thermoplastic resin foam composite aggregate according to the present invention will be described in detail.
As shown in FIG. 1, the thermoplastic resin foam composite aggregate 1 according to the present invention has a specific thermoplastic resin foam string X and a specific thermoplastic resin foam piece Y in a specific weight ratio. It is a thermoplastic resin foam composite aggregate having specific properties by mixing with.

The thermoplastic resin foamed string X used in the present invention is a thin piece made of a foamed thermoplastic resin, and the bulkiness of the thermoplastic resin foamed string is 20 to 60 mm. By using such a bulky thermoplastic resin foam string, the softness, heat retention and the like are excellent. From this point of view, the bulkiness of the thermoplastic resin foamed string is preferably 25 to 50 mm, more preferably 30 to 45 mm. This bulkiness can be adjusted by changing the material, dimensions, shape, etc. of the thermoplastic resin foamed string, for example, the difference between the maximum width and the minimum width described later for the thermoplastic resin foamed string. The bulkiness is increased by increasing the length, increasing the length of the thermoplastic resin foam string, or the like. The thermoplastic resin foamed string X may be used by mixing two or more types of thermoplastic resin foamed strings having at least one different value among the maximum width, the minimum width, the thickness and the length. When used in a mixed state, the thermoplastic resin foamed string in the mixed state may satisfy the above-mentioned bulkiness.
The bulkiness of the thermoplastic resin foamed string-like material was determined by the following procedure in accordance with the test method of JIS standard L1903: 2017.
As a measuring device, a cylinder having a diameter of 175 [mm] and a loading disk having a diameter of 170 [mm] and a weight of 43.6 [g] are used, and the measurement sample amount is about 10 [g].
<Test procedure>
1) Place the measurement sample in a cylinder and slowly lower the load disk suspended from above with a thread.
2) Measure the time for 2 minutes from the time when the thread hanging the load disk loosens.
3) The height of the load disk after 2 minutes is measured in units of 1 [mm] at three points on the cylinder, and the average value is taken as bulkiness.
4) Repeat the above steps 1) to 3) three times to obtain the average value of the bulkiness three times, and set it as the bulkiness.

The thickness T (see FIG. 2) of the thermoplastic resin foamed string X used in the present invention in the thickness direction is preferably 0.1 to 2.0 mm, preferably 0.2 to 1.5 mm. It is more preferable, and it is particularly preferable that it is 0.3 to 1.5 mm. The length L (see FIG. 2) of the thermoplastic resin foam string X in the longitudinal direction is preferably 10 to 50 mm, more preferably 12 to 40 mm, and more preferably 15 to 30 mm. Especially preferable. If the thickness of the thermoplastic resin foamed string satisfies the above range, it is excellent in productivity when manufactured by cutting or the like, and holes communicating with the thermoplastic resin foamed string are formed in the thermoplastic resin foamed string. Since the ratio is increased and the structure approaches the mesh structure, the flexibility and resilience are excellent, and the feeling of stiffness is clearly suppressed. Further, the longer the length of the thermoplastic resin foamed string is 50 mm or less, and the smaller the length is, the better the handling such as filling property into the coating material becomes better as a substitute for feathers, synthetic fiber cotton and the like. .. On the other hand, the longer the length, the higher the bulkiness. Further, the length of the thermoplastic resin foamed string is within the above range, and at least one end has a corrugated curve configuration, so that the thermoplastic resin has both excellent bulkiness and resilience. Become.
The thickness T is an arithmetic mean value of the thickness obtained by measuring the thickness at five points at equal intervals from one end to the other in the longitudinal direction of the thermoplastic resin foamed string. Further, the length L is the maximum length in the longitudinal direction of the thermoplastic resin foamed string in the stationary state.

It is preferable that one or both ends of the thermoplastic resin foamed string X used in the present invention in the width direction form a corrugated curve as described above (see FIG. 2). That is, it is preferable that a convex portion and a concave portion are formed on the end side of the thermoplastic resin foam string-like material. However, their protrusions and recesses may be regular or irregular. The ratio (A / T) of the maximum value (maximum width) A (see FIG. 2) of the length in the width direction to the thickness T described above is 3 or more from the viewpoint of heat retention, resilience, etc., which will be described later. It is preferably 3 to 20, still more preferably 5 to 15, from the viewpoint of particularly excellent softness. Further, the ratio (A / B) of the maximum value (maximum width) A of the length in the width direction and the minimum value (minimum width) B (see FIG. 2) of the length in the width direction is a composite aggregate described later. From the viewpoint of the action of preventing slippage and the like, the content is preferably more than 1.3, more preferably 1.5 to 10, and particularly preferably 2 to 5.
As shown in FIG. 2, the maximum width A is the maximum width of the flakes in the width direction on the plane orthogonal to the thickness direction, and the minimum width B is the width direction in the plane orthogonal to the thickness direction. The minimum width of the flakes.

By forming the thermoplastic resin foamed cord-like material X having an end having a corrugated curve in which the above-mentioned convex portions and concave portions exist, the thermoplastic resin foamed cord-like material X and the thermoplastic resin foamed piece described later will be formed. When the mixture with Y is deposited, the irregularities of the thermoplastic resin foamed strings intersect, and the thermoplastic resin foam pieces Y intersect with the irregularities of the thermoplastic resin foamed strings, making it difficult for them to shift from each other and depositing. The effect of maintaining the state occurs. Maintaining the deposited state means that air is retained between the composite aggregates of the thermoplastic resin foam string and the thermoplastic resin foam pieces, the heat retention effect is ensured, and the resilience and flexibility are excellent. It means that

Further, the thermoplastic resin foam string-like material X used in the present invention preferably has a large number of holes formed on a surface orthogonal to the thickness direction (see FIG. 2). In the present invention, the surface orthogonal to the thickness direction of the thermoplastic resin foamed string has two surfaces, front and back, and it is preferable that a large number of holes are formed on both surfaces. The pore diameter of the pores of these thermoplastic resin foamed strings is preferably 0.1 to 3.0 mm, more preferably 0.2 to 2.0 mm, and 0.2. It is particularly preferably ~ 1.5 mm. Furthermore, in view of the number of pores also flexibility of these holes is preferably from 1-15 / mm ^2, more preferably from 1 to 10 / mm ^2, at 1-8 / mm ² It is particularly preferable to have. This means that the inside of the thermoplastic resin foam string is almost occupied by a large number of holes, and the wall thickness of the holes is thin. Further, it is preferable that the holes communicate with each other in the thickness direction from the viewpoint that the recoverability and flexibility of the thermoplastic resin foam string-like material are particularly excellent. The proportion of the holes communicating in the thickness direction is preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more of the total number.
The pore diameter is measured by measuring the maximum pore diameter (see FIG. 2) of all (50 or more) holes on the photograph based on a photograph of a surface orthogonal to the thickness direction of the thermoplastic resin foam string. Then, the arithmetic mean value of the measured maximum pore diameter is adopted. Further, the number of holes is counted by counting the number of all the holes on the photograph based on the photograph of the plane orthogonal to the thickness direction of the thermoplastic resin foam string, and the count is the heat on the photograph. A value obtained by dividing by the area of the plane orthogonal to the thickness direction of the thermoplastic resin foamed string is adopted (however, when counting the number of holes, the thermoplastic resin foamed string on the photograph is used. Holes that intersect the right edge of the plane orthogonal to the thickness direction of are not counted.)

As described above, the thermoplastic resin foam string-like material X preferably used in the present invention has a large number of holes on the surface orthogonal to the thickness direction thereof, so that the holes allow air to be contained therein. Hold, and each thermoplastic resin foam string itself also holds air. The composite aggregate of the thermoplastic resin foamed string X and the thermoplastic resin foam piece Y retains air between the composite aggregates as described above, and therefore, due to their synergistic effect, a large heat retention property is achieved. Occurs. Further, when the pore diameter is a specific value, the entire thermoplastic resin foam string-like material can be easily deformed. Moreover, as described above, other thermoplastic resin foamed strings and thermoplastic resin foam pieces come into mesh with the unevenness formed on the edge in the width direction, and a mutual displacement prevention effect is exhibited. As a result, the shape restoration force is increased, and as soon as the deformation force disappears, the shape is restored in the same manner as feathers and synthetic fiber cotton.

The above-mentioned thermoplastic resin foam string-like material X can be realized, for example, by thinly cutting a thermoplastic resin foam sheet having irregularities formed on its surface.
The thermoplastic resin foam sheet can be produced, for example, by a known method described in JP-A-57-117365, JP-A-58-143229, and the like. In this method for producing a foam sheet, a base resin, a foaming agent, and an air bubble adjusting agent are supplied to an extruder, and these are kneaded to obtain a foamable melt-kneaded product, and then a thermoplastic resin for the kneaded product is obtained. A tubular foam is formed by extruding from an annular slit having a notch corresponding to the uneven shape of the surface of the foam sheet under atmospheric pressure conditions of lower pressure and lower temperature than in the extruder. Heat in which irregularities are formed on the surface by a method of cutting open the tubular foam extruded in this way in the extrusion direction, or by crushing the tubular foam up and down to bond the surfaces inside the tubular foam. A plastic resin foam sheet can be obtained.

The base resin constituting the thermoplastic resin foam sheet, that is, the base resin constituting the thermoplastic resin foamed string used in the present invention is excellent in toughness, flexibility, water resistance, resilience, chemical resistance and the like. Polyolefin-based resins are preferable, and it is preferable that 50% by weight or more, more 70% by weight or more, and particularly 90% by weight or more of the base resin is composed of the polyolefin resin. Further, from the viewpoint of improving durability, bulkiness and heat resistance, it is preferable to select a crosslinked polyolefin resin as the base resin.
Among the polyolefin-based resins, it is preferable to use a polyethylene-based resin from the viewpoint of excellent flexibility and resilience. From the same viewpoint, among the above-mentioned polyolefin resins, polyolefin resins having a flexural modulus of 400 MPa or less, more preferably 100 to 300 MPa, such as low-density polyethylene, linear low-density polyethylene, and ethylene-vinyl acetate copolymer, are used. Especially preferable.
The flexural modulus was measured at JIS standard K7171: 2008, test piece; manufactured by injection molding, test piece size 80 mm × 10 mm × 4 mm, test piece state adjustment, and test speed 2 mm / min.

When forming a thermoplastic resin foam string from the foam sheet, first, as shown in FIG. 3A, the thermoplastic resin foam sheet 10 is first cut along the extrusion direction along the line shown by the broken line. Then, a plurality of strip-shaped bodies 11 are formed. Then, as shown in FIG. 3B, when the strip 11 is cut along the line indicated by the alternate long and short dash line in the width direction, the thermoplastic resin foamed string X is completed. The thermoplastic resin foamed string X has a length L corresponding to the width of the strip 11, a thickness T corresponding to the cut width of the strip 11, and a width W which is the thickness of the thermoplastic resin foam sheet. It is a strip-shaped thin piece.

Further, an antistatic function can be added to the thermoplastic resin foam string-like material. By adding an antistatic function to the thermoplastic resin foamed string, it is possible to improve the handleability when mixing with the thermoplastic resin foam piece and the handleability of the thermoplastic resin foamed string. As a method of adding the antistatic function, for example, by adding an antistatic agent to the base resin constituting the thermoplastic resin foam sheet, the antistatic function is added to the produced thermoplastic resin foamed string. Can be added. As the antistatic agent to be added, a polymer type antistatic agent is preferable. Specific examples of the polymer-type antistatic agent include "Perestat 300", "Perestat 230", "Perestat HC250", and "Perectron PVH" manufactured by Sanyo Kasei Kogyo Co., Ltd. as block copolymers of polyether and polyolefin. , "Perectron PVL", "Perectron HS", "Perectron LMP", etc., which are commercially available as ionomer resins under trade names such as "Entila SD100", "Entila MK400" manufactured by Mitsui DuPont Polychemical Co., Ltd. Can be done.

On the other hand, the bulk density of the thermoplastic resin foam piece Y used in the present invention is 0.01 to 0.05 g / cm ³ . By using the thermoplastic resin foam piece having such a bulk density, when it is mixed with the above-mentioned thermoplastic resin foamed string, the mixture is good and separation after mixing is difficult to occur, and the bulk is maintained. It will be excellent in sex. From this viewpoint, the bulk density of the thermoplastic resin foam pieces is preferably 0.013~0.03g / cm ^3, further preferably 0.015~0.025g / cm ^3.
Regarding the bulk density of the thermoplastic resin foam pieces, the thermoplastic resin foam pieces are left to stand for 2 days under the conditions of a relative humidity of 50%, a temperature of 23 ° C., and a normal pressure. Next, an empty graduated cylinder was prepared, and an arbitrary amount of the thermoplastic resin foam piece group (weight w1 [g] of the thermoplastic resin foam piece group) left for 2 days was placed in the graduated cylinder and placed on the bottom surface of the graduated cylinder. By tapping the floor surface several times, the filling height of the thermoplastic resin foam pieces in the cylinder is stabilized. ^{Then, the volume v1 [cm 3} ] of the thermoplastic resin foam piece group indicated by the scale of the measuring cylinder is measured. It can be measured by dividing the weight w1 [g] of the thermoplastic resin foam pieces placed in the graduated cylinder by the volume v1 [cm ³ ] (w1 / v1) [g / cm ^3].

Further, the thermoplastic resin foam piece Y used in the present invention is preferably spherical, elliptical spherical, bale-shaped, cylindrical or cylindrical foam particles, but foam chip-like products, crushed foam products and the like can also be used. .. However, when considering the fluidity and the like, the shape of the foam piece is preferably spherical or bale-shaped with no corners, and particularly preferably spherical. The maximum diameter of the thermoplastic resin foam piece Y is 0.5 to 10 mm from the viewpoint of improving the mixability and fluidity with the above-mentioned thermoplastic resin foam string-like material X. It is preferably 1 to 7 mm, more preferably 2 to 5 mm, and particularly preferably 2 to 5 mm.
The maximum diameter of the thermoplastic resin foam pieces is, for example, measured by measuring the maximum diameter of each of 50 randomly selected foam pieces using a scanning electron microscope and calculating the average value thereof. Can be sought.

The thermoplastic resin foam piece Y used in the present invention has a plurality of closed cells, and the closed cell ratio thereof is preferably 70% or more, more preferably 80% or more, still more preferably 90%. That is all. When the closed cell ratio is high, even a foam piece having a small particle size has excellent recovery during repeated compression, and the foam piece has low water absorption, so that a filling having good drainage property when washed can be obtained. Can be provided.
The closed cell ratio of the thermoplastic resin foam piece is the ratio of the volume of the closed cell to the volume of the total cell in the foam piece, and is measured using an air comparative hydrometer based on ASTM-D2856-70. ..

The average cell diameter of the thermoplastic resin foam piece Y is preferably 150 to 700 μm.
The average cell diameter of the thermoplastic resin foam piece draws a straight line passing through substantially the center of the foam piece on the image of the cut surface of the foam piece obtained by using a microscope, and the straight line penetrates. The number n of bubbles and the foamed particle diameter L (μm) determined from the intersection of the straight line and the surface of the foamed piece are read and calculated by the following equation.
Average diameter of bubbles (μm) = L ÷ n

The base material constituting the thermoplastic resin foam piece Y used in the present invention can be appropriately selected. For example, a polyolefin resin such as polyethylene and polypropylene, a polystyrene resin, a polyester resin such as a polylactic acid resin, and a polycarbonate A thermoplastic elastomer such as a based resin, a composite resin containing a polyolefin-based resin and a polystyrene-based resin, or a polyolefin-based thermoplastic elastomer or a polyurethane-based thermoplastic elastomer can be used. Among the above resins, it is preferable to use a polyolefin-based resin, a polystyrene-based resin, or a composite resin of a polyolefin-based resin and a polystyrene-based resin from the viewpoint of excellent cushioning properties. Further, as the polyolefin-based resin, a polypropylene-based resin or a polyethylene-based resin is preferable, and a polyethylene-based resin is particularly preferable.

As the polyethylene-based resin, it is preferable to use a resin containing a copolymer of ethylene and an α-olefin having 4 to 10 carbon atoms (hereinafter, abbreviated as “LLDPE”) as a main component, and the polyethylene resin has 4 carbon atoms. The α-olefins of 10 to 10 include 1-butene, 1-pentene, 1-hexene, 3,3-dimethyl-1-butene, 4-methyl-1-pentene, 4,4-dimethyl-1-pentene, 1- Examples include octene. The content of these α-olefins in the entire LLDPE resin is usually preferably 1 to 20% by weight, particularly preferably 3 to 10% by weight. Further, LLDPEs having different densities and the like can be mixed with each other, or low-density polyethylene (hereinafter, abbreviated as LDPE) or high-density polyethylene (hereinafter, abbreviated as HDPE) can be mixed with LLDPE. The polyethylene-based resin is preferably a non-crosslinked polyethylene-based resin.

Hereinafter, a method for producing the thermoplastic resin foam particles will be described as an example of the thermoplastic resin foam piece Y, but unless otherwise specified, a foam chip-like product, a crushed foam product, or the like is used instead of the foam particles. In some cases, similar techniques can be applied.
First, the above resins are mixed by a mixing method such as a dry blend method or a masterbatch method, and the mixed resin is further pelletized by an extruder to obtain foaming resin particles. At this time, if necessary, an antistatic agent, an antioxidant, an ultraviolet absorber, a chlorine absorber, a pigment, a dye and the like can be contained. It is desirable to use an antistatic agent from the viewpoint of improving the handleability when mixing with the thermoplastic resin foam string and the handleability of the thermoplastic resin foam piece. Examples of the antistatic agent added to the thermoplastic resin foam piece Y include the same antistatic agents used for the thermoplastic resin foam string.

The foaming resin particles produced by the above method are heated while being dispersed in a dispersion medium together with a foaming agent in a closed container, the resin particles are impregnated with the foaming agent, and then at a temperature equal to or higher than the temperature at which the resin particles soften. By releasing the particles under atmospheric pressure, the foaming resin particles can be foamed (hereinafter referred to as "one-stage foaming") to obtain foamed pieces. It should be noted that a non-crosslinked polyethylene resin is used as the base material constituting the thermoplastic resin foam piece Y, and foamed particles are produced by the above method without performing a cross-linking method such as addition of peroxide or irradiation with radiation. Cross-linked polyethylene-based resin foam particles can be obtained.

As the foaming agent, an inorganic gas foaming agent such as carbon dioxide, nitrogen, argon or air is preferable. Although these foaming agents can be used alone or in combination, carbon dioxide is particularly preferable in that foam pieces having a uniform bubble diameter and a high foaming ratio can be obtained. Further, a volatile foaming agent such as propane, butane, pentane, hexane, cyclobutane, cyclohexane, trichlorofluoromethane, and dichlorodifluoromethane can be mixed and used with these inorganic gas foaming agents. Moreover, you may use a volatile foaming agent as a foaming agent. These foaming agents need to be added in an amount necessary to obtain a foam piece having a desired foaming ratio, and are generally 5 to 20 parts by weight with respect to 100 parts by weight of the resin.

A foam piece can be obtained only by the above-mentioned one-step foaming, but the foam piece used in the present invention has a desired foaming ratio (bulk density as described above) by re-foaming the foam piece obtained by the one-step foaming. It is preferably 0.01 to 0.05 g / cm ³ ) (hereinafter referred to as "two-stage foaming"). When two-stage foaming is adopted, the closed cell ratio of the foamed piece can be improved as compared with the case where a foam piece having a desired foaming ratio (bulk density) is obtained only by one-stage foaming, and the recoverability during repeated compression is improved. It becomes excellent, and a foam piece having less water absorption can be obtained.

A known method can be adopted for the above-mentioned two-stage foaming. For example, the one-stage foam piece is left at room temperature under atmospheric pressure, or if necessary, it is dried with hot air to reduce the internal pressure of the foam piece. After stabilizing at a pressure almost equal to atmospheric pressure (hereinafter abbreviated as "aging"), air of a predetermined pressure is introduced with the foam pieces in a pressurized tank, and the mixture is left for a certain period of time. After raising the internal pressure of the foam pieces (hereinafter abbreviated as "particle internal pressure") above the atmospheric pressure, it is possible to adopt a method in which the one-stage foam pieces are taken out from the pressurized tank and two-stage foaming is performed using steam. it can.
As a means for obtaining foamed pieces such as foamed chips and crushed foams other than the thermoplastic resin foamed particles used in the present invention, the thermoplastic resin is extruded into a rod shape from the tip of the extruder for foaming. It can be obtained as a chip-shaped foam piece by slicing it with a cutter blade immediately after extrusion foaming. The foam crushed product can be obtained by crushing an existing foam particle molded product, foam sheet, or the like with a crusher.

The thermoplastic resin foam piece Y may be used by mixing two or more types of thermoplastic resin foam pieces having at least one different shape and base material from the above-mentioned foam pieces, and when used in a mixed manner. It is sufficient that the thermoplastic resin foam pieces in the mixed state satisfy the bulk density.

In the thermoplastic resin foam composite aggregate 1 according to the present invention, the above-mentioned thermoplastic resin foam string-like material X and the above-mentioned thermoplastic resin foam piece Y were mixed at a weight ratio of 10:90 to 40:60. It is a thing. When the mixing ratio of the thermoplastic resin foam string-like material is smaller than the above, the softness, heat retention and the like are not excellent. On the contrary, when the mixing ratio of the thermoplastic resin foamed string is larger than the above, the bulk retention and the drainage during washing are poor. From this point of view, it is preferable that the above-mentioned thermoplastic resin foamed string X and the above-mentioned thermoplastic resin foam piece Y are mixed at a weight ratio of 12:88 to 35:65, preferably 15:85 to 15:85. It is more preferable that the mixture is mixed at a weight ratio of 30:70.

The mixing of the thermoplastic resin foam string X and the thermoplastic resin foam piece Y is not particularly limited, and may be performed using a known mixer, and the mixed state of both materials is homogeneous, that is, random from the mixture. It is preferable that the proportion of the thermoplastic resin foam string-like material X contained in the foam taken out from the above is within a certain range.

The bulk density of the thermoplastic resin foam composite aggregate 1 according to the present invention, which is composed of a mixture of the thermoplastic resin foam string X and the thermoplastic resin foam piece Y, is 0.01 to 0.03 g / cm ³ . .. By forming a thermoplastic resin foam composite aggregate having such a bulk density, it has excellent bulk retention while having softness, heat retention, etc., and has good drainage when washed, and is made of feathers and synthetic fiber cotton. It can be suitably used as a substitute. From this viewpoint, the bulk density of the thermoplastic resin foam composite assembly is preferably 0.012~0.028g / cm ^3, further preferably 0.014~0.025g / cm ^3.
The bulk density of the thermoplastic resin foam composite aggregate can be determined by the following method. The thermoplastic resin foam composite aggregate is left to stand for 2 days under the conditions of a relative humidity of 50%, a temperature of 23 ° C., and a normal pressure. Next, an empty graduated cylinder was prepared, and an arbitrary amount of the thermoplastic resin foam composite aggregate (weight w2 [g] of the thermoplastic resin foam composite aggregate) left for 2 days was placed in the graduated cylinder. By tapping the floor surface several times with the bottom surface of the graduated cylinder, the filling height of the thermoplastic resin foam composite aggregate in the cylinder is stabilized. ^{Then, the volume v2 [cm 3} ] of the thermoplastic resin foam composite aggregate indicated by the scale of the measuring cylinder is measured. It can be measured by dividing the weight w2 [g] of the thermoplastic resin foam composite aggregate placed in the graduated cylinder by the volume v2 [cm ³ ] (w2 / v2) [g / cm ^3].

The above-mentioned thermoplastic resin foam composite aggregate 1 according to the present invention can be directly filled and used as a filling for clothing, cushions, pillows, body pillows, foot pillows or futons. In addition, it may be packed in a bag having a large number of holes and used as a padding for clothing, cushions, pillows, body pillows, foot pillows or futons in a small portion. In this case, the stuffing made of a mixture of the thermoplastic resin foamed string X and the thermoplastic resin foam piece Y is difficult to separate and is less likely to be biased, and has better drainability during washing. It becomes a thing. The weight of the thermoplastic resin foam composite aggregate 1 packed in each of the divided bags is preferably 5 to 50 g, more preferably 10 to 30 g. The shape of the holes provided in the bag is not particularly limited as long as the thermoplastic resin foam composite aggregate 1 packed in the bag does not separate from the inside of the bag to the outside and has water permeability, for example, a circular shape. The holes may be oval, oval, or the like, and may be made of knitted fabric, woven fabric, or non-woven fabric. The raw material of the bag is preferably made of, for example, a thermoplastic resin such as a polypropylene resin, a polyethylene resin, a polystyrene resin, or a polyester resin. Further, it is preferable that the bag has elasticity. In addition, in this specification, the term "knitting" means the cloth product obtained by making the shape one by one in the manner of making the knot of a thread and a fiber. Further, in the present specification, the term "woven fabric" is a cloth product obtained by using a large number of warp threads and one or more weft threads to make a fabric step by step in a structure in which threads intersect. Means.

Pillows and futons filled with the above-mentioned stuffing have good drainage property especially when washed, and can be easily washed.

The thermoplastic resin foam composite aggregate according to the present invention described above has excellent bulk retention while having softness, heat retention, etc., and has good drainage when washed, and feathers and synthetic fiber cotton. Can be suitably used as a substitute for.

1 Thermoplastic resin foam composite aggregate X Thermoplastic foam string-like material Y Thermoplastic resin foam piece 10 Synthetic resin foam sheet 11 Band-shaped body

The present invention relates to garments, cushions, pillows or duvet padding, as well as pillows and duvets .

The present invention has been made in view of the actual situation of the above-mentioned background technology, and its purpose is to have softness, heat retention, etc., excellent bulk retention, and good drainage when washed. , To propose padding for clothing, cushions, pillows or duvets.

In order to achieve the above-mentioned object, the present invention has been made into the clothes, cushions, pillows or stuffing for futons described in the following [1] to [9 ], as well as pillows and futons.
[1] A composite assembly of a thermoplastic resin foam obtained by mixing a thermoplastic resin foam string having a bulkiness of 20 to 60 mm and a thermoplastic resin foam piece having a bulk density of 0.01 to 0.05 g / cm ^3. Filling for body clothing, cushions, pillows or duvets
The weight ratio of the thermoplastic resin foam string to the thermoplastic resin foam piece is 10:90 to 40:60.
The bulk density of the thermoplastic resin foam composite aggregate is 0.01 to 0.03 g / cm ³ .
Stuffing for clothing, cushions, pillows or duvets .
[2] The cloth, cushion, pillow or futon according to the above [1], wherein the base resin of the thermoplastic resin foamed string is a polyolefin resin having a flexural modulus of 400 MPa or less. Stuffing .
[3] The thermoplastic resin foam piece base material, characterized in that it is either a composite resin or a thermoplastic elastomer, a polyolefin resin, a polystyrene resin, a polyolefin resin and polystyrene resin, the Stuffing for clothing, cushions, pillows or duvets according to [1] or [2].
[4] For clothing, cushions, pillows or futons according to any one of the above [1] to [3], wherein the length of the thermoplastic resin foam string-like material is 10 to 50 mm. Stuffing .
[5] For clothing, cushions, pillows or futons according to any one of the above [1] to [4], wherein the maximum diameter of the thermoplastic resin foam piece is 0.5 to 10 mm. Stuffing .
[6] The filling for clothing, cushion, pillow or futon according to any one of the above [1] to [5], wherein the thermoplastic resin foam piece is a non-crosslinked polyethylene-based resin foam particle. ..
[ 7 ] Clothes, cushions, pillows, or the like, wherein the thermoplastic resin foam composite aggregate according to any one of the above [1] to [6] is packed in a bag having a large number of holes. Stuffing for futons.
[ 8 ] A pillow characterized by being filled with the stuffing for clothing, cushions, pillows or duvets according to any one of the above [1] to [7].
[ 9 ] A futon, characterized in that it is filled with the clothing, cushion, pillow or stuffing for the futon according to any one of the above [1] to [7].

The above-mentioned stuffing for clothes, cushions, pillows or futons of the present invention has excellent bulk retention and good drainage when washed, while having softness and heat retention. Therefore, the stuffing for clothing, cushions, pillows or futons of the present invention can be suitably used as stuffing for pillows, futons and the like. In addition, since it is a thermoplastic resin product, the supply amount is stable compared to natural feathers regardless of the factors of weather and illness, which can lead to stable market price.

The stuffing for clothing, cushions, pillows or duvets of the present invention described above has excellent bulk retention while having softness, heat retention, etc., and has good drainage when washed, and feathers and synthetic fibers. It can be suitably used as a substitute for cotton.

Claims (10)

A thermoplastic resin foam composite aggregate obtained by mixing a thermoplastic resin foam string having a bulkiness of 20 to 60 mm and a thermoplastic resin foam piece having a bulk density of 0.01 to 0.05 g / cm ^3. hand,
The weight ratio of the thermoplastic resin foam string to the thermoplastic resin foam piece is 10:90 to 40:60.
The bulk density of the thermoplastic resin foam composite aggregate is 0.01 to 0.03 g / cm ³ .
Thermoplastic resin foam composite aggregate. The thermoplastic resin foam composite aggregate according to claim 1, wherein the base resin of the thermoplastic resin foamed string is a polyolefin resin having a flexural modulus of 400 MPa or less. 1 or claim 1, wherein the base material of the thermoplastic resin foam piece is any one of a polyolefin resin, a polystyrene resin, a composite resin of a polyolefin resin and a polystyrene resin, or a thermoplastic elastomer. 2. The thermoplastic resin foam composite aggregate according to 2. The thermoplastic resin foam composite aggregate according to any one of claims 1 to 3, wherein the length of the thermoplastic resin foam string-like material is 10 to 50 mm. The thermoplastic resin foam composite aggregate according to any one of claims 1 to 4, wherein the maximum diameter of the thermoplastic resin foam piece is 0.5 to 10 mm. The thermoplastic resin foam composite aggregate according to any one of claims 1 to 5, wherein the thermoplastic resin foam pieces are non-crosslinked polyethylene-based resin foam particles. A padding for clothing, cushions, pillows or duvets, comprising the thermoplastic resin foam composite aggregate according to any one of claims 1-6. A padding for clothing, cushions, pillows or duvets, comprising packing the thermoplastic resin foam composite aggregate according to any one of claims 1 to 6 in a bag having a large number of holes. A pillow, characterized in that it is filled with the filling according to claim 7 or 8. A futon, characterized in that it is filled with the filling according to claim 7 or 8.

Images