JP2011016235A - Core material and sheet for heat insulation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core material which makes vapor-deposited aluminum hardly peeled off, and a sheet for heat insulation using the core material.SOLUTION: A lap robe 3 is constituted with the core material 10 as a center which is formed of a polyethylene terephthalate nonwoven fabric 12, an urethane resin anchor coat layer 14 formed on the surface at the inner surface side of the nonwoven fabric 12, a vapor-deposited aluminum layer 16 formed on the surface at the inner surface side of the anchor coat layer 14, and an urethane resin overcoat layer 18 formed on the surface at the inner surface side of the vapor-deposited aluminum layer 16. The vapor-deposited aluminum layer 16 is formed at the nonwoven fabric 12 through the anchor coat layer 14. As opposed to direct formation of the vapor-deposited aluminum layer 16 in the nonwoven fabric 12, the adhesive force of the vapor-deposited aluminum layer 16 to the nonwoven fabric 12 is improved. In other words, since the vapor-deposited aluminum layer 16 is made to withstand the peeling, the core material 10 and the lap robe 3 in which a heat insulation effect continues stably for a long time are formed.

Description

  The present invention relates to a core material and a heat insulation sheet, and more particularly to a core material for use in a kneeling and the like and a heat insulation sheet using the same.

  In the conventional heat insulation sheet, a sheet that exhibits a heat insulation effect by using a core material provided with a vapor-deposited aluminum layer has been proposed (for example, Patent Document 1).

  FIG. 4 is a cross-sectional view of the heat insulating sheet disclosed in Patent Document 1.

Referring to the figure, a rug 70, which is a heat insulating sheet, includes a base material layer (core material) 71 composed of a polypropylene (PP) nonwoven fabric 72 that generates far-infrared rays and vapor-deposited aluminum 76 formed on the outer surface thereof. It is structured in the center. The first fleece layer 20 is attached to the outer surface side of the base material layer 71 via the first adhesive 31. The 1st fleece layer 20 is comprised from the 1st fabric part 21 and the 1st fleece process part 22 which raised the outer surface side of the 1st fabric part 21. As shown in FIG. And the 2nd fleece layer 25 comprised from the 2nd fabric part 26 and the 2nd fleece process part 27 is affixed on the inner surface side of the base material layer 71 through the 2nd adhesive agent 32. FIG.
In the rug 70 configured in this way, the release of the user's body temperature from the inner surface side is blocked by the vapor-deposited aluminum 76, and the heat is held by the second fleece layer 25. Combined with the effect, the heat retention effect is further improved.

JP 2009-57644 A

  In the conventional heat insulation sheet as described above, the vapor deposition aluminum is directly formed on the nonwoven fabric of the core material, so that the adhesion is weak. And especially when wash | cleaning the sheet | seat for heat retention, vapor deposition aluminum peels, and the heat retention effect by vapor deposition aluminum reduces.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a core material in which vapor-deposited aluminum is difficult to peel off and a heat insulation sheet using the core material.

  In order to achieve the above object, the invention described in claim 1 is a core material for use in a heat insulation sheet, comprising a nonwoven fabric made of a synthetic resin and an anchor coat layer formed on one surface of the nonwoven fabric. And a vapor-deposited aluminum layer formed on the outer surface of the anchor coat layer.

  If comprised in this way, a vapor deposition aluminum layer will be formed through an anchor coat layer with respect to a nonwoven fabric.

  According to a second aspect of the present invention, in the configuration of the first aspect of the present invention, an overcoat layer formed on the outer surface of the deposited aluminum layer is further provided.

  If comprised in this way, the outer surface of a vapor deposition aluminum layer will be coat | covered with an overcoat layer.

  According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, the overcoat layer generates far infrared rays.

  If comprised in this way, the generated far infrared rays will be emitted to the outer side of the overcoat layer, and the far infrared rays emitted to the nonwoven fabric side will be reflected by the deposited aluminum layer.

  According to a fourth aspect of the present invention, in the configuration of the third aspect of the present invention, the overcoat layer is composed of a first base material and a first substance that generates far-infrared rays mixed with the first base material. Is.

  If comprised in this way, the far-infrared generation amount from an overcoat layer will be determined according to content of the 1st substance which generate | occur | produces a far-infrared ray.

  According to a fifth aspect of the present invention, in the configuration of the first or second aspect of the present invention, the anchor coat layer generates far infrared rays.

  When comprised in this way, the generated far infrared rays are emitted to the nonwoven fabric side, and the far infrared rays emitted to the vapor deposition aluminum layer side are reflected by the vapor deposition aluminum layer.

  According to a sixth aspect of the present invention, in the configuration of the fifth aspect of the invention, the anchor coat layer is composed of a second base material and a second substance that generates far infrared rays mixed with the second base material. Is.

  If comprised in this way, the far infrared ray generation amount from an anchor coat layer will be determined according to content of the 2nd substance which generate | occur | produces a far infrared ray.

  The invention according to claim 7 is a heat insulating sheet, and uses the core material according to any one of claims 1 to 6.

  If comprised in this way, it will become difficult to peel off the vapor deposition aluminum layer of the core material of a heat retention sheet | seat.

  As described above, in the invention according to claim 1, since the deposited aluminum layer is formed on the nonwoven fabric through the anchor coat layer, the deposited aluminum layer is directly formed on the nonwoven fabric. improves.

  In addition to the effect of the first aspect of the invention, the outer surface of the deposited aluminum layer is covered with the overcoat layer, so that the adhesion of the deposited aluminum is further improved.

  In addition to the effect of the invention described in claim 2, the far infrared ray generated is emitted to the outer side of the overcoat layer, and the far infrared ray emitted to the nonwoven fabric side is evaporated aluminum. Reflected by the layer. For this reason, when the overcoat layer is used on the heat retaining sheet so as to be on the user side, the blood circulation of the user is efficiently promoted, and the thermal effect and the like are also exhibited for a long time.

  In addition to the effect of the invention described in claim 3, the invention described in claim 4 determines the amount of far infrared rays generated from the overcoat layer according to the content of the first substance that generates far infrared rays. The amount of far infrared rays generated from the layer can be easily adjusted.

  According to the fifth aspect of the invention, in addition to the effect of the first or second aspect of the invention, the generated far infrared rays are emitted to the nonwoven fabric side, and the far infrared rays emitted to the vapor deposition aluminum layer side are vapor deposited. Reflected by the aluminum layer. For this reason, when the nonwoven fabric is used for the heat-retaining sheet so as to be on the user side, the blood circulation of the user is efficiently promoted, and the thermal effect and the like are also exhibited for a long time.

  In addition to the effect of the invention of claim 5, the invention of claim 6 determines the amount of far infrared rays generated from the anchor coat layer in accordance with the content of the second substance that generates far infrared rays. The amount of far infrared rays generated from the layer can be easily adjusted.

  According to the seventh aspect of the invention, since the deposited aluminum layer of the core material of the heat insulation sheet is difficult to peel off, the heat insulation sheet has a long-term and stable heat retention effect.

It is a perspective view which shows the sheet | seat for heat insulation by 1st Embodiment of this invention. It is an expanded sectional view of the II-II line shown in FIG. It is an expanded sectional view which shows the sheet | seat for heat insulation by 2nd Embodiment of this invention, Comprising: It corresponds to FIG. 2 of 1st Embodiment. It is sectional drawing of the conventional heat retention sheet | seat.

  FIG. 1 is a perspective view showing a heat insulation sheet according to the first embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along line II-II shown in FIG.

  Referring to these drawings, a rug 3 which is a rectangular heat insulating sheet includes a nonwoven fabric 12, an anchor coat layer 14 formed on the inner surface of the nonwoven fabric 12, and an inner surface of the anchor coat layer 14. The core material 10 is mainly composed of a vapor-deposited aluminum layer 16 formed on the inner surface of the vapor-deposited aluminum layer 16 and an overcoat layer 18 formed on the inner surface of the vapor-deposited aluminum layer 16.

The nonwoven fabric 12 is made of polyethylene terephthalate (PET) and has a unit weight of 40 g / m ² . Since PET has a recycled material, it is effective from the environmental aspect. The deposited aluminum layer 16 is formed to have a thickness of 600 mm. The overcoat layer 18 is composed of a urethane resin as a first substrate and an oxide ceramic with an average particle diameter of 50 μm, which is a first substance that generates far-infrared rays contained in the urethane resin. Yes. Therefore, far infrared rays are generated from the overcoat layer 18. The weight ratio of the urethane-based resin and the oxide-based ceramic is 2: 1, and the overcoat layer 18 is set so that the unit weight is 2.5 g / m ² by combining them. The anchor coat layer 14 is made of a urethane-based resin that is the second base material, and the unit weight is set to 1.5 g / m ² .

  A first fleece layer 20 is attached to the outer surface side of the core member 10 via a first adhesive 31. The 1st fleece layer 20 is comprised from the 1st fabric part 21 and the 1st fleece process part 22 which raised the outer surface side of the 1st fabric part 21. As shown in FIG. Further, a second fleece layer 25 is attached to the inner surface side of the core member 10 via a second adhesive 32. The second fleece layer 25 is composed of a second fabric portion 26 and a second fleece processing portion 27 in which the inner surface side of the second fabric portion 26 is raised.

  As described above, the vapor-deposited aluminum layer 16 is formed on the nonwoven fabric 12 via the anchor coat layer 14. Therefore, the deposited aluminum layer 16 is directly formed on the nonwoven fabric 12 as in the case of a conventional heat insulation sheet, whereas the adhesion of the deposited aluminum layer 16 to the nonwoven fabric 12 is improved. That is, even if washing is repeated, the deposited aluminum layer 16 is difficult to peel off. Therefore, the rug 3 is provided with the core material 10 in which the heat retention effect in which the release of the user's body temperature is prevented by the deposited aluminum layer 16 is stably maintained for a long time.

  The inner surface of the deposited aluminum layer 16 is protected by the overcoat layer 18. Therefore, since the possibility that the deposited aluminum layer 16 is affected from the outside is reduced, the adhesion force is further improved.

  Further, far infrared rays generated from the overcoat layer 18 are emitted to the inner surface side, and far infrared rays emitted to the nonwoven fabric 12 side are reflected by the deposited aluminum layer 16. Therefore, if the rug 3 is used so that the overcoat layer 18 is on the user side, that is, the inner surface side is on the user side, far infrared rays are concentrated toward the user. This stimulates the user's cells and promotes blood circulation efficiently. Moreover, since the release of the user's body temperature from the inner surface side is blocked by the deposited aluminum layer 16 and the heat is retained by the second fleece layer 25, the far-infrared effect and the adhesion of the deposited aluminum layer 16 are improved. In combination with this, the heat retention effect, the heat effect, etc. are also exhibited in the long term.

  Furthermore, since the overcoat layer 18 is composed of a urethane resin and an oxide ceramic, the distance from the overcoat layer 18 depends on the content of the oxide ceramic that generates far infrared rays with respect to the urethane resin. The amount of infrared generation is determined. Therefore, the amount of far infrared rays generated from the overcoat layer 18 can be easily adjusted. Further, since far infrared rays are generated by the inclusion of oxide ceramics in the urethane resin, production in a small lot is possible.

  Here, the manufacturing method of the core material 10 is demonstrated.

First, a PET nonwoven fabric 12 having a unit weight of 40 g / m ² is manufactured by a spunbond method and formed into a rectangular sheet shape. Next, a urethane resin is coated on one surface of the nonwoven fabric 12 by a spray method to form an anchor coat layer 14 having a unit weight of 1.5 g / m ² . Next, aluminum deposition is performed on the outer surface of the anchor coat layer 14 by a sputtering method to form a deposited aluminum layer 16 having a thickness of 600 mm. Next, the outer surface of the deposited aluminum layer 16 is coated with a urethane resin and oxide ceramics mixed in a weight ratio of 2: 1 by a spray method, and the unit weight Forms an overcoat layer 18 of 2.5 g / m ² . In this way, the core material 10 can be manufactured. The rug 3 shown in FIG. 1 is completed by attaching the first fleece layer 20 and the second fleece layer 25 to the both surfaces of the core material 10 via the first adhesive 31 and the second adhesive 32, respectively. To do.

  FIG. 3 is an enlarged sectional view showing a heat insulation sheet according to the second embodiment of the present invention, and corresponds to FIG. 2 of the first embodiment.

  With reference to the figure, the mattress 5 is configured with a core material 10 as the center, and the core material 10 is the same as that of the first embodiment. A cotton layer 41 is formed on the inner surface side of the core material 10, and a foamed urethane layer 42 having a thickness of 1 cm is formed on the outer surface side of the core material 10. Further, the exposed surface of each layer is covered with an exterior material 45 made of polyester fabric. And each member which comprises the mattress 5 is integrated by the quilting process.

  Since the mattress 5 is configured as described above, when the mattress 5 is used so that the inner surface side is on the user side, the mattress 5 has a good feeling of use due to water absorption by the cotton layer 41 and elasticity by the foamed urethane layer 42. The heat retention effect of the mattress 5 is the same as that of the first embodiment.

  In each of the above embodiments, the heat insulation sheet is configured as a rug or a mattress, but may be configured as another heat insulation sheet such as a blanket as long as the core material described above is provided. Needless to say. Further, the heat insulating sheet is not limited to a rectangular shape, and may have another shape.

  Further, in each of the above embodiments, the overcoat layer is formed on the core material, but the overcoat layer may be omitted.

  Further, in each of the above embodiments, the overcoat layer is composed of the first base material and the first substance to generate far infrared rays, but the overcoat layer is configured to generate far infrared rays. Other configurations may be used as long as they are.

  Further, in each of the above embodiments, far infrared rays are generated from the overcoat layer, but far infrared rays may be generated from the anchor coat layer. In this case, the anchor coat layer may be the same as the overcoat layer, such as being composed of the second base material and the second substance that generates far infrared rays. In this case, the overcoat layer is configured so that far infrared rays are not generated, and the outer surface side in FIGS. 2 and 3 is used on the user side. Alternatively, far infrared rays may not be generated from either the overcoat layer or the anchor coat layer.

Further, in the foregoing embodiments, although the unit weight using PET nonwoven 40 g / ^{m 2,} unit weight of the PET non-woven fabric may be any ^{3~1000g / m 2, 10~200g / m} 2 If it is better. When the unit weight of a nonwoven fabric is 3 g / m < ² > or less, there exists a possibility that an anchor coat layer, a vapor deposition aluminum layer, and an overcoat layer may pass a nonwoven fabric. Further, the nonwoven fabric is not limited to PET, but may be other materials as long as it is a synthetic resin.

Furthermore, in each of the above embodiments, the first base material of the overcoat layer and the second base material of the anchor coat layer are both made of urethane resin, but each layer has a unit weight of 0.1 to 10 g. / ^{m 2} may be composed by, better if 0.5 to 5.0 g / ^{m 2.} When each layer is 0.1 g / m ² or less, the adhesion of the deposited aluminum layer becomes weak. Moreover, when each layer is 10 g / m ² or more, the cost becomes high. The first base material may be a synthetic resin system, an inorganic system, or a natural product system as long as the first substrate and the deposited aluminum layer have high adhesion. Furthermore, the second base material may be a synthetic resin system, an inorganic system, or a natural product system, as long as the first base material has high adhesion to the nonwoven fabric and the deposited aluminum layer. As synthetic resins, thermoplastic resins include vinyl acetate resin, acrylic resin, ethylene / vinyl acetate copolymer system, vinyl chloride / vinyl acetate copolymer system, polyamide system, polyvinyl acetal and polyvinyl alcohol, and thermosetting. There are urea (urea) resin, melamine resin, phenol resin and epoxy resin as resin, and chloroprene rubber (CR), nitrile rubber (NBR), styrene / butadiene rubber (SBR), natural rubber (rubber / elastomer) NR) and polyurethane systems. Inorganic systems include sodium oxalate, cement and gypsum. Natural product systems include starch and oxidized starch as starch systems, and casein as protein systems.

  Furthermore, in each said embodiment, although the film thickness of the vapor deposition aluminum layer is formed in 600 mm, the film thickness should just be 100-2000 mm. When the film thickness is 100 mm or less, the heat reflection effect is reduced. Further, when the film thickness is 2000 mm or more, the cost is high.

  Further, in each of the above embodiments, the weight ratio of the urethane-based resin as the first substrate and the oxide-based ceramic as the first substance is 2: 1, but these weight ratios are 100: 1 to 1: 1. It may be within the range of 1:10. When the weight ratio is less than 100: 1, the far-infrared effect is reduced. Moreover, when there are more oxide ceramics than weight ratio 1:10, since adhesiveness of urethane type resin and oxide type ceramics falls, it becomes easy to take oxide type ceramics from urethane type resin.

  Further, in each of the above embodiments, an oxide ceramic having an average particle size of 50 μm is used as the first material of the overcoat layer. It may be a material ceramic, a carbide ceramic, a carbonate ceramic, a nitride ceramic, a halide ceramic, a phosphate ceramic, special carbon, alkali olivine, or the like. Moreover, the average particle diameter should just be 300 micrometers or less. When the average particle diameter exceeds 300 μm, the first substance can be easily removed from the first substrate.

  Furthermore, in each of the above embodiments, a PET nonwoven fabric is used as the core material. However, a woven fabric can be used instead of the nonwoven fabric as long as it can support the anchor coat layer, the deposited aluminum layer, and the overcoat layer. Other materials such as nets, films, paper, and aluminum foil may be used.

  Furthermore, in each of the embodiments described above, a vapor deposited aluminum layer is formed on the core material, but an aluminum foil may be used instead of the vapor deposited aluminum layer. In that case, dry lamination, wet lamination, thermal lamination, extrusion lamination, non-solvent lamination, or the like may be used for adhesion to the nonwoven fabric.

  Next, using the core material according to the first embodiment (Examples 1 to 3) and the core material according to the conventional example (Comparative Examples 1 and 2), the heat retention effect by each core material and the durability of the deposited aluminum An experiment was conducted. First, the configuration of each example and comparative example will be described.

Example 1 is the same as the core of the first embodiment, the PET nonwoven fabric unit weight 40 g / ^{m 2,} and the anchor coat layer of the unit weight 1.5 g / ^{m 2} made of urethane resin, film A vapor-deposited aluminum layer having a thickness of 600 mm and an overcoat layer having a unit weight of 2.5 g / m ^{2 made} of urethane resin and oxide ceramics having a weight ratio of 2: 1.

  In Example 2, the overcoat layer is eliminated from the configuration of Example 1.

  In Example 3, the anchor coat layer is eliminated from the configuration of Example 2, and a vapor-deposited aluminum layer is formed directly on one surface of the PET nonwoven fabric.

Comparative Example 1 is composed of a PP non-woven fabric having a unit weight of 40 g / m ² (including far-infrared ceramics having a unit weight of 0.8 g / m ² ) and a deposited aluminum layer having a thickness of 600 mm.

The comparative example 2 is comprised only with PET nonwoven fabric of unit weight 40g / m < ² >.

  As a method in Experiment 1, with respect to Example 1 and Comparative Example 1, each core before and after washing was tested on a test subject who had been resting for 30 minutes in a quiet room at a room temperature of 20 ° C. and a humidity of 50%. The material was wrapped around the subject's instep. At this time, in Example 1, the core material was wound so that the overcoat layer was on the test subject side. Moreover, in the comparative example 1, the core material was wound so that PP nonwoven fabric might become a to-be-tested person side. The average temperature increased after 10 minutes was measured by thermography. For thermography, model number: FSV-7000 manufactured by Apiste Corporation was used. In addition, washing was performed in accordance with the JIS-L-0217-103 method three times, and the detergent used was an attack that is a synthetic detergent (Attack is a registered trademark).

  For Examples 1 to 3 and Comparative Example 1, the amount of evaporated aluminum before and after each washing was measured with an ICP emission spectroscopic analyzer under the same conditions as described above. As the ICP emission spectroscopic analyzer, model number: iCAP6500 manufactured by Thermo Fisher Scientific Co., Ltd. was used.

  The results of experiments conducted in this way are shown in the table below.

上記の表を参照して、まず、実施例１と比較例１との１０分後の平均上昇温度に注目すると、洗濯前においては共に２．３℃上昇しており、洗濯後においては実施例１は２．２℃上昇しているが、比較例１においては０．８℃上昇している。即ち、実施例１においては洗濯前後における保温効果及び温熱効果に差はほとんど無いが、比較例１においては洗濯前後における保温効果及び温熱効果が大幅に減少している。

With reference to the above table, first, focusing on the average temperature rise after 10 minutes of Example 1 and Comparative Example 1, both rose by 2.3 ° C. before washing, and after washing, the example 1 increased by 2.2 ° C., but in Comparative Example 1, it increased by 0.8 ° C. That is, in Example 1, there is almost no difference between the heat retaining effect and the thermal effect before and after washing, but in Comparative Example 1, the heat retaining effect and the thermal effect before and after washing are greatly reduced.

  Next, attention will be paid to the vapor deposition aluminum remaining rate of Examples 1 to 3 and Comparative Example 1.

  First, when Example 1 and Comparative Example 1 are compared, in Example 1, the remaining amount of evaporated aluminum is 80%, whereas the remaining amount of evaporated aluminum in Comparative Example 1 is 19%. As described above, the deposited aluminum layer greatly contributes to the heat retention effect of the user's body temperature and the blood circulation promotion by far infrared rays. That is, the heat retention effect of the core material becomes lower as the deposition aluminum remaining rate is lower.

  Next, when Example 1 and Example 2 are compared, in Example 1, the vapor deposition aluminum remaining rate is 80%, whereas in Example 2, the vapor deposited aluminum remaining rate is 70%. As described above, since Example 2 is obtained by eliminating the overcoat layer from the configuration of Example 1, it can be said that this 10% difference contributes to the presence or absence of the overcoat layer. That is, it was confirmed that the adhesion of the deposited aluminum layer was improved by the overcoat layer.

  Next, when Example 2 is compared with Example 3, in Example 2, the remaining amount ratio of evaporated aluminum is 70%, whereas the remaining amount ratio of evaporated aluminum in Example 3 is 50%. As described above, since Example 3 is obtained by removing the anchor coat layer from the configuration of Example 2, it can be said that the difference of 20% contributes to the presence or absence of the anchor coat layer. That is, it was confirmed that the adhesion of the deposited aluminum layer was improved by the anchor coat layer.

  Next, when Example 3 and Comparative Example 1 are compared, in Example 3, the remaining amount of evaporated aluminum is 50%, whereas the remaining amount of evaporated aluminum in Comparative Example 1 is 19%. As described above, the difference between Example 3 and Comparative Example 1 is that PET nonwoven fabric is used in Example 3 and PP nonwoven fabric is used in Comparative Example 1. Therefore, it was confirmed that the PET nonwoven fabric is more effective than the PP nonwoven fabric from the viewpoint of adhesion of vapor-deposited aluminum to the nonwoven fabric.

  Next, as a method in Experiment 2, with respect to Example 1 and Comparative Example 2, each core material was tested with respect to the test subject who was resting for 30 minutes in a quiet room at room temperature of 20 ° C. and humidity of 50%. The average temperature which was wound around the instep of the foot and increased after 10 minutes was measured by thermography. The same thermography as in Experiment 1 was used. In Example 1, the surface of the core material on the test subject side when winding the core material is the same as in Experiment 1.

  The results of experiments conducted in this way are shown in the table below.

上記の表を参照して、実施例１と比較例２との１０分後の平均上昇温度を比較すると、実施例１においては２．２℃上昇し、比較例２においては０．６℃上昇している。実施例１においては、ＰＥＴ不織布、アンカーコート層、蒸着アルミニウム層及びオーバーコート層によって構成されているが、比較例２においてはＰＥＴ不織布のみで構成されている。つまり、実施例１の構成は、ＰＥＴ不織布のみの芯材に対して保温効果及び温熱効果の高い芯材であり、蒸着アルミニウム層及び遠赤外線を発生するオーバーコート層の効果が確認された。

Referring to the above table, comparing the average temperature rise after 10 minutes between Example 1 and Comparative Example 2, the temperature rises by 2.2 ° C. in Example 1 and rises by 0.6 ° C. in Comparative Example 2. is doing. In Example 1, it is comprised by the PET nonwoven fabric, the anchor coat layer, the vapor deposition aluminum layer, and the overcoat layer, but in Comparative Example 2, it is comprised only by the PET nonwoven fabric. That is, the configuration of Example 1 is a core material having a high heat retaining effect and a high thermal effect with respect to the core material made of only PET nonwoven fabric, and the effects of the vapor-deposited aluminum layer and the overcoat layer that generates far infrared rays were confirmed.

DESCRIPTION OF SYMBOLS 3 ... Throw 5 ... Mattress 10 ... Core material 12 ... Nonwoven fabric 14 ... Anchor coat layer 16 ... Deposition aluminum layer 18 ... Overcoat layer In addition, the same code | symbol in each figure shows the same or an equivalent part.

Claims (7)

A core material for use in a heat insulation sheet,
A non-woven fabric made of synthetic resin;
An anchor coat layer formed on one surface of the nonwoven fabric;
The core material provided with the vapor deposition aluminum layer formed in the outer surface of the said anchor coat layer.   The core material according to claim 1, further comprising an overcoat layer formed on an outer surface of the deposited aluminum layer.   The core material according to claim 2, wherein the overcoat layer generates far infrared rays.   The said overcoat layer is a core material of Claim 3 comprised by the 1st base material and the 1st substance which generate | occur | produces the far infrared rays mixed with the said 1st base material.   The core material according to claim 1, wherein the anchor coat layer generates far infrared rays.   The said anchor coat layer is a core material of Claim 5 comprised by the 2nd base material and the 2nd substance which generate | occur | produces the far infrared rays mixed with the said 2nd base material.   A heat insulating sheet using the core material according to any one of claims 1 to 6.

Images