JP2010119708A - Sleeping pad - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sleeping pad achieving quick warming performance similar to that when an aluminum foil sheet is used, and preventing such cold touch as given when the aluminum foil sheet is used. <P>SOLUTION: An upper layer member 2 comprising a polyolefinic foam resin sheet, an intermediate layer material 3 comprising a polyolefinic resin bubble cushion sheet with a number of air-enclosed projections, which is called an air cap or the like in registered trademark, and a lower layer member 4 comprising flexible polyurethane foam material are laminated in this order from the top. Through-holes 5 are formed vertically from the upper layer member 2 to the lower layer member 4 at an opening ratio of 3-30% to the total area to prevent steaming. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a laying pad of a type that is used by being placed on a mattress or a bed, particularly in winter, and that keeps warm using the body temperature of the human body.

Conventionally, for example, an aluminum sheet layer is bonded to one side of a foamed urethane sheet as a thermal insulation sheet that can reflect heat generated from the human body efficiently and exhibit excellent thermal insulation properties by being housed in bedding or furniture. Or the technique (for example, refer patent document 1) which vapor-deposits and laminates is known.
In addition, technologies that use bubble cushioning materials (such as air cap “registered trademark” or bubble wrap “registered trademark” depending on the manufacturer) used for packaging etc. as sleeping bags and futons are also known. A heat-insulating sheet that includes a sleeping bag in which a foil sheet, a bubble cushioning material, and a flexible plastic sheet are laminated (for example, see Patent Document 2), and a heat-shielding sheet in which aluminum foil is laminated on the front and back surfaces of the bubble cushioning material. A blanket (see, for example, Patent Document 3) is also known.
JP 2004-168008 A Registered Utility Model Publication No. 3004274 JP 2004-73781 A

  By the way, as a means for effectively utilizing the heat of the human body to enhance the heat retention effect, many use an aluminum foil sheet having excellent thermal conductivity, and heat generated from the human body is known. When using an aluminum foil sheet on the human body contact side, especially in the pad used to place on a mattress or bed in winter, In particular, when the room is at a low temperature, it feels cool when the human body comes into contact with it, so it could not be very preferable. Moreover, when using an aluminum foil sheet, there was a limit to keeping the manufacturing cost low. Furthermore, when an aluminum foil sheet is used, there is a problem in that it is easily stuffy due to lack of air permeability.

  Therefore, the present invention can obtain a quick warming property that is not inferior to the case of using an aluminum foil sheet, and at the same time, does not feel the cold feeling of contact as in the case of using an aluminum foil sheet. The purpose is to provide a low-priced pad with low cost.

  In order to achieve the above object, the present invention provides an upper layer material made of a polyolefin resin foam sheet, an intermediate layer material made of a polyolefin resin air bubble buffer sheet in which a large number of convex portions enclosing air are formed, and a lower layer made of a flexible polyurethane foam. A laying pad in which materials are laminated in order from the top is constructed.

  That is, the present inventors have been researching for a new material with a quick warming property to replace the aluminum foil sheet, a polyolefin-based resin bubble cushion sheet (manufactured by a manufacturer, A sheet called a registered trademark such as an air cap or bubble wrap is found to be as fast as an aluminum foil sheet, and it feels cool even when touched by hand when the room is cold. There was almost no. However, if this is to be applied to the pad placed under the body, it is necessary to devise in particular from the standpoints of shape retention and strength. In order to make the buffer sheet difficult to break and to suppress the harsh sound generated from the polyolefin resin foam cushion sheet, the polyolefin resin foam sheet is laminated on the upper layer on the side in contact with the human body and a large load is applied. It has been found that laminating a flexible polyurethane foam sheet in the lower layer is effective.

  The thickness of the polyolefin-based resin foam sheet of the upper layer material is preferably 0.5 to 2 mm from the viewpoint of noise suppression of the foam cushioning sheet, protection of the foam cushioning sheet, quick warming property, etc. The polyolefin-based resin bubble buffer sheet has a bubble diameter of 3 to 7 mm, a pitch interval of 1 to 5 mm, a height of 2 to 5 mm, and a film thickness of 10 to 50 μm. The thickness of the flexible polyurethane foam as the lower layer material is preferably 3 to 20 mm from the viewpoints of protection of air bubbles in the foam cushioning sheet, cushioning properties, and the like.

Moreover, in this invention, it is desirable to form the hole which penetrates up and down from the upper layer material to the lower layer material in the said pad in the ratio of the opening rate of 3 to 30% with respect to the total area.
By providing such a through hole, the air permeability can be improved, and an effect of preventing stuffiness can be obtained.

In the present invention, the polyolefin-based resin bubble cushioning sheet is adhered to the lower layer material with the convex side facing downward.
That is, a polyolefin-based resin bubble cushioning sheet is generally formed by bonding a sheet formed in a concavo-convex shape by vacuum molding or the like and a flat sheet to make the internal space of the convex part a bubble enclosing part. By adhering to the relatively thick lower layer material with the part side facing down, even if compressive deformation force is applied by rolling over, the deformation of the convex portion can be absorbed by the elastic force of the lower layer material, Can be hard to break.

As a laying pad, the upper layer material made of polyolefin resin foam sheet, the middle layer material made of polyolefin resin foam cushioning sheet, and the lower layer material made of flexible polyurethane foam are bonded and laminated in order from the top to speed up the aluminum foil sheet. The performance which is not inferior to that of warmth can be exhibited, and further, the cool feeling at the time of contact as in the case of using an aluminum foil sheet can be avoided, and it can be constructed at low cost. In addition, the destruction or crushing of bubbles in the bubble buffer sheet is prevented, and durability can be enhanced.
At this time, it is possible to surely prevent stuffiness by providing a predetermined proportion of holes that penetrate vertically, and adhere to the lower layer flexible polyurethane foam with the convex side of the polyolefin resin bubble buffer sheet facing downward. By doing so, the durability can be further improved.

Embodiments of the present invention will be described with reference to the accompanying drawings.
Here, FIG. 1 is a plan view and a cross-sectional view showing an example of a spread pad according to the present invention, and FIG. 2 is an enlarged view of the cross-section.

  The laying pad according to the present invention has a heat retaining effect equivalent to that of an aluminum foil sheet even if a material cheaper than that of an aluminum foil sheet is used. It has been developed as a pad that does not feel and is difficult to squeeze, and uses a bubble buffer sheet that is relatively inexpensive and easily available.

  In winter, when the environmental temperature is low, it feels cold when entering a bedding such as a futon, and the bedding is gradually warmed by body temperature, and it takes time until the body feels warm. This is because it takes time for the air in the foam and the air between the fibers to be warmed by the body temperature when the padding of the bedding is urethane foam or fiber wadding.

  Therefore, the lay pad 1 according to the present invention is configured as an auxiliary tool for bedding that is placed between a rug such as a futon and the body in such winter, and feels cold even when the environmental temperature is low. It is made to feel warmth quickly by using its own body temperature (there is quick warming).

  That is, as shown in FIGS. 1 and 2, the main pad 1 includes an upper layer material 2 made of a foamed sheet such as polyethylene or polypropylene, which is a polyolefin resin, and a cell cushion sheet such as polyethylene or polypropylene, which is a polyolefin resin. An intermediate layer material 3 made of the above and a lower layer material 4 made of a flexible polyurethane foam are bonded and laminated in order from the top. In this laying pad 1, in order to prevent not only heat retention and cushioning, but also prevention of stuffiness, a through-hole 5 penetrating vertically from the upper layer material 2 to the lower layer material 4 has a total area (planar area in FIG. 1). It is preferable that the aperture ratio is 3 to 30%.

  The bubble buffer sheet of the middle layer material 3 is formed by fusing a concavo-convex film in which a large number of concavo-convex portions are formed by vacuum forming or the like to a melt-extruded plastic film and a flat back film that has been melt-extruded. An air-filled sheet in which air is enclosed, and depending on the manufacturer, is a sheet referred to as a registered trademark such as an air cap or bubble wrap. In this bubble cushioning sheet, each bubble is arranged independently at regular intervals, and each bubble is only covered with a thin film. Because only the air is warmed independently, warmth can be felt in a short time.

On the other hand, for example, in the case of a synthetic resin foam sheet, although there are an infinite number of independent bubbles, since the periphery of the bubbles is covered with the thick part of the material itself, the bubbles are formed through the heat conduction of the material itself. It begins to warm up, and the way of warming is somewhat slower.
In addition, in the case of fiber cotton, the gap between the fibers constituting the cotton is not an independent space but a continuous space, so even if heat is applied from the part in contact with the hand, the heat is still lower It takes time to move to and warm the entire sheet.

  Also, in the case of a metal sheet with good thermal conductivity such as an aluminum foil sheet, even if its thickness is about 0.1 to 0.2 mm, for example, it is a part that is warmed in contact with the hand because it has good thermal conductivity The heat spreads to the part that is not touching and propagates, and then the whole sheet is warmed. At this time, aluminum has good thermal conductivity and reflects heat, so it is easy to warm up, but it has a strong feeling of cold contact, and it is easy to take away the heat of the body, so it feels colder in the cold, and on the contact side of the body It is not a preferred material for placement.

In the present invention, the bubble diameter of the bubble buffer sheet is 3 to 7 mm, the pitch interval is 1 to 5 mm, and the bubble height is 2 from the viewpoints of quick warming, heat retention, cushioning, and bubble durability. ˜5 mm.
In addition, in order to improve the quick warming property of such a foam cushioning sheet, it is preferable to reduce the thickness of the film constituting the foam cushioning sheet, and to make it 10 to 50 μm thick, more preferably 20 to 30 μm thick. preferable.
Further, in order to suppress air bubbles from being removed and to obtain the strength of the sheet, the bubble buffer sheet is preferably composed of a polyolefin resin, and more preferably a polypropylene resin.
In addition, if the film is thinned to increase the strength, the film may become hard and the sound may become louder. In order to suppress this sound, the present invention laminates the upper material 2 described below. is doing.

  The upper layer material 2 is laminated on the upper part of the middle layer material 3 in order to suppress the noise caused by the bubble buffer sheet of the middle layer material 3 and to enhance the protection function of the bubble buffer sheet. At this time, the upper layer material 2 is careful not to impair the thermal conductivity between the bubbles of the bubble cushioning sheet and the body. The upper layer material 2 is preferably made of a polyolefin-based resin foamed sheet such as polyethylene or polypropylene that is flexible and warm to touch, and the thickness is preferably 0.5 to 2 mm. If the thickness exceeds 2 mm, the quick warming property tends to be hindered. If the thickness is less than 0.5 mm, the intermediate layer material 3 is easily broken and the bonding workability is poor, and the influence of the adhesive is large. This is because it also affects the quick warmth.

The lower layer material 4 is made of a flexible polyurethane foam and is laminated below the middle layer material 3 in order to improve cushioning and to enhance the effect of protecting the air bubbles in the middle layer material 3.
For this reason, it is preferable to make the thickness 3 to 20 mm relatively thick. If it is less than 3 mm, the protective effect of the foam cushioning sheet is inferior, and if it exceeds 20 mm, the fit during use may be impaired. In addition, it is preferable that the hardness of a flexible polyurethane foam is 60-180N (JIS K 6400). If it is less than 60N, the protective effect of the foam cushioning sheet is poor, and if it exceeds 180N, it tends to be hard and uncomfortable.
Further, as shown in FIG. 2, the relationship between the lower layer material 4 and the middle layer material 3 is downward so that the apex side of the convex portion t of the bubble cushioning sheet of the middle layer material 3 faces the lower layer material 4, and the convex portion t The apex side is preferably bonded and fixed to the lower layer material 4.

  When the lower layer material 4 and the middle layer material 3 are bonded and fixed as described above, even if the user sits on the laying pad 1 and turns over at the time of going to bed and the compression deformation force is applied, the lower layer material 4 The force applied to the convex portion t by the elastic force can be absorbed, and the bubbles can be made difficult to break.

  Of the adhesion between the upper layer material 2 and the middle layer material 3 and the adhesion between the middle layer material 3 and the lower layer material 4, in particular, in the adhesion between the upper layer material 2 and the middle layer material 3, in selecting the type of adhesive, etc. Care must be taken not to interfere with sex. Specifically, water-based adhesives such as urethane resins and acrylic resins are preferably used as such adhesives. In addition, about the adhesion method, although the method of apply | coating with a spray or a roll coater is mentioned, it is not limited to these methods.

The through hole 5 is formed so as to penetrate vertically from the upper layer material 2 of the laying pad 1 through the lower layer material 4 so as to effectively prevent the stuffiness that is likely to occur due to the close contact between the body and the laying pad 1. ing. At this time, the shape of the hole is arbitrary, but it is preferable to set the aperture ratio to 3 to 30% with respect to the total area of the entire mat.
This is because if it is less than 3%, stuffiness is likely to occur, and if it exceeds 30%, stuffiness will not occur, but the heat retaining properties will deteriorate, and the strength of the pad 1 will also be weakened. Particularly preferred is an aperture ratio of 5 to 15%.

The main pad 1 is configured as described above, and here, the results of experiments on the heating rate (rapid warming property) of the bubble cushioning sheet and the aluminum foil sheet will be described.
At an environmental temperature of 27 ° C., a sample was placed on a polystyrene foam table, and a palm was placed on the sample to measure the temperature rise of the palm portion. The temperature rise of the sample is only from the body temperature of the palm, and since the polystyrene foam is under the sample, the temperature rise state of the sample is directly transmitted to the palm.
Here, as a sample, (1) bubble buffer sheet (made of polypropylene with a film thickness of 20 μm, bubble diameter 4 mmφ, bubble height 4 mm, bubble pitch 1.0 mm), (2) aluminum foil sheet (thickness 150 μm) The results of measuring the surface rising rate after 1 minute are shown in Table 1.

  As a result, it can be seen that both of them suddenly warmed when the palm is applied, but when comparing the rate of temperature rise after 1 minute from the hand, the bubble buffer sheet is warmed faster than the aluminum foil sheet. Turned out to be.

  On the other hand, an experiment similar to the above was performed at an ambient temperature of 15 ° C., and the surface temperature of the sample after 20 seconds was measured. The results are shown in Table 2.

  As a result, both of them touch a cold sample at 15 ° C., and after 20 seconds, the heat of the hand is taken away by the sample, and the temperature on the sample surface side temporarily decreases. At this time, since aluminum has a large thermal conductivity and easily takes heat away, the surface temperature becomes lower than the bubble buffer sheet after 20 seconds. From this, it can be seen that the temperature on the sample surface side feels warmer with the bubble buffer sheet and cooler with the aluminum foil sheet.

Also, in a laboratory adjusted to an environmental temperature of 20 ° C. and a humidity of 65% RH, three types of pads based on soft polyurethane foam with a density of 32 kg / m ³ , a hardness of 80 N, and a thickness of 7 mm were laid on a mattress, I lay down in a supine posture and put a duvet on top to check the temperature rise of various pads.
Here, the three types of pads are: (1) the above flexible polyurethane foam alone, (2) bubble buffer sheet (made of polypropylene with a film thickness of 20 μm, bubble diameter 4 mmφ, bubble height 4 mm, bubble pitch 1.0 mm) And a laminate of the flexible polyurethane foam, (3) a laminate of an aluminum foil sheet (thickness 150 μm) and the flexible polyurethane foam, and the temperature rising rate of the pad surface after 1 minute was measured. The results are shown in Table 3.

  As a result, in the case of a flexible polyurethane foam alone, the rate of temperature increase after 1 minute is 0.107 ° C./sec, and in the case of a laminate of a bubble buffer sheet and a flexible polyurethane foam, it is 0.123 ° C./sec. In the case of a laminate of a foil sheet and a flexible polyurethane foam, the temperature was 0.125 ° C./sec. As a result, it was found that the laminate of the foam cushion sheet and the flexible polyurethane foam, and the laminate of the aluminum foil sheet and the flexible polyurethane foam, both had a higher temperature rising rate than the case of the flexible polyurethane foam alone, Further, it was found that the laminate of the bubble buffer sheet and the flexible polyurethane foam has a temperature increase rate comparable to that of the laminate of the aluminum foil sheet and the flexible polyurethane foam.

As shown in FIG. 1, width 900 mm, length 300 mm, upper layer material 2 (polyethylene foam sheet, thickness 1 mm), middle layer material 3 (made of polypropylene with a film thickness of 20 μm, bubble diameter 4 mmφ, bubble height 4 mm, bubble height A spread pad 1 made of a laminate of a foam cushioning sheet having a pitch of 1.0 m) and a lower layer material 4 (a soft polyurethane foam having a density of 32 kg / m ³ , a hardness of 80 N, and a thickness of 7 mm) was provided. At this time, as an adhesive between the upper layer material 2 and the middle layer material 3 and as an adhesive between the middle layer material 3 and the lower layer material 4, an aqueous bond 7 (Sumitomo 3M, solid content 52%) having a low risk of hindering the quick warming property is used. Using. In bonding the upper layer material 2 and the middle layer material 3, 30 g / m ^{3 is} applied and adhered to the middle layer material 3 in a wet state by spraying, and the lower layer material 4 is bonded to the middle layer material 3 and the lower layer material 4. 50 g / m ^{3 was} applied and adhered in a wet state with a roll coater.
Thereafter, a total of 50 through holes 5 having a diameter of 25 mmφ penetrating vertically were formed from the upper layer material 2 to the lower layer material 4 to form holes having an opening ratio of 7.8% with respect to the total area.

When such a mat pad 1 is placed on a mattress, etc., it does not feel the cold feeling of contact like an aluminum foil sheet, and obtains the same quick warming as when an aluminum foil sheet is used. In addition, the cushioning properties were good, and there was no stuffiness. Also, the rattling noise was not noticed and the durability was good.
As a result, the effectiveness of the present invention was confirmed.

  In addition, this invention is not limited to the above embodiments. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.

  As a mat that uses the body temperature to keep the human body warm, it feels warm when you enter the futon, it feels warm immediately, and at the same time it can be constructed at a very low cost, so it can be used as an aid for bedding, especially in winter Widespread use is expected.

An example of the laying pad which concerns on this invention is shown, (a) is a top view, (b) is sectional drawing. Cross-sectional enlarged view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Laying pad, 2 ... Upper layer material, 3 ... Middle layer material, 4 ... Lower layer material, 5 ... Through-hole, t ... Bubble convex part.

Claims (3)

An upper layer material made of a polyolefin resin foam sheet, an intermediate layer material made of a polyolefin resin bubble buffer sheet in which a large number of convex portions enclosing air are formed, and a lower layer material made of a flexible polyurethane foam are adhesively laminated in order from the top. A laid pad characterized by that. The laying pad according to claim 1, wherein a hole penetrating vertically from the upper layer material to the lower layer material is formed in the laying pad at a ratio of an opening ratio of 3 to 30% with respect to the total area. The laying pad according to claim 1 or 2, wherein the foam cushioning sheet is bonded to the lower layer material with a convex side facing downward.

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