JP3946616B2 - Helmet with excellent reflective insulation - Google Patents

Helmet with excellent reflective insulation Download PDF

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JP3946616B2
JP3946616B2 JP2002312536A JP2002312536A JP3946616B2 JP 3946616 B2 JP3946616 B2 JP 3946616B2 JP 2002312536 A JP2002312536 A JP 2002312536A JP 2002312536 A JP2002312536 A JP 2002312536A JP 3946616 B2 JP3946616 B2 JP 3946616B2
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helmet
reflective
heat insulation
temperature
layer
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一夫 原口
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一夫 原口
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Description

【０００１】
【産業上の利用分野】
本発明は、直射日光等を浴びることによりヘルメットの内側の温度が上昇するのを防止する反射断熱性に優れたヘルメットに関するものである。
【０００２】
【従来の技術】
一般に工事現場や工場等において作業者等は頭部を守るためにヘルメットの着用が義務付けられており、また自動二輪車や原動機付自転車等を運転する際においても運転者や同乗者はヘルメットの着用が法令により義務付けられているので、作業者や運転者等は現場で作業を行ったり運転したりする際には如何なる気候条件であっても頭部を守るために必ずヘルメットを着用しなければならない。
【０００３】
しかしながら、特に日差しの強い夏期の晴天時においてはヘルメットの外面に直射日光等が当たることによりヘルメットの内側の温度が異常に上昇するので、内側の温度が異常に上昇したヘルメットを着用している作業者や運転者等は汗等によって蒸れたりするので非常に暑苦しく不快になるばかりでなく、熱中症になって倒れてしまったり、暑さのために集中力が欠如することにより作業ミスや運転ミスが生じて作業中の事故や交通事故等を起こしてしまったりするという問題があった。
【０００４】
そこで、このようなヘルメットの内側の温度上昇を緩和させるために、例えば通風口等の開口部を設けて換気性を向上させたヘルメット（例えば、特許文献１及び特許文献２参照。）や、内側に保冷マットを着脱自在に内装したヘルメット（例えば、特許文献３参照。）等が提案された。
【０００５】
しかしながら、通風口等の開口部を設けて換気性を向上させたヘルメットは、自動二輪車等の走行時には走行風が通風口等の開口部より流入することによってルメットの内側の温度上昇を緩和させることが可能であるが、自動二輪車等の停車時や渋滞時においては走行風が発生しないのでヘルメットの内側の温度上昇を緩和させることができないという欠点があると共に、工事現場や工場等において作業を行う際には一定の場所で作業することが多く通風口等の開口部より空気が流入することが殆どないので、ヘルメットの内側の温度上昇を緩和させることができないという欠点があった。
【０００６】
そして、内側に保冷マットを着脱自在に内装したヘルメットは、保冷剤が冷却効果を奏している一定時間内においてはヘルメットの内側の温度上昇を緩和させることが可能であるが、保冷剤の冷却効果がなくなるとヘルメットの内側の温度が急激に上昇するという欠点があると共に、保冷剤の冷却効果がなくなった場合には新たに保冷剤を交換しなければならなく手間がかかるばかりでなく、保冷マットを内装したことによってヘルメットの重量が増加するという欠点もあった。
【０００７】
また、ヘルメットの外側表面に断熱塗料を塗布したものも提案されている（例えば、特許文献４参照。）。しかしながら、具体的にどのような断熱塗料がヘルメットの内側の温度上昇を緩和させるのに有効且つ好適であるか、またどのような断熱塗料を用いれば塗装の欠けや剥がれ等が生じずに従来の塗装と同等な耐久性を得ることができるかが未だ解明されていないという欠点があった。
【０００８】
【特許文献１】
特開平１１−１８９９１０号公報
【特許文献２】
特開２００２−６９７３８号公報 （図８）
【特許文献３】
特開２０００−９６３３３号公報
【特許文献４】
特開２０００−２７０２０号公報
【０００９】
【発明が解決しようとする課題】
本発明は、従来技術の前記欠点を解消し、直射日光等を浴びることによりヘルメットの内側の温度が上昇するのを防止する反射断熱性に優れたヘルメットを提供することを課題とする。
【００１０】
【課題を解決するための手段】
本発明者は前記課題を解決すべく鋭意研究の結果、ヘルメット本体の少なくとも外側の面に、塗装する際の下地となると共に直射日光等を反射する反射下地層を形成し、その反射下地層の上面に直射日光等を反射すると共にヘルメットの外側の面の熱が内側へ伝導しないように断熱する共重合体から成る反射断熱層を形成し、更にその反射断熱層の上面に反射下地層及び反射断熱層を保護し耐久性を高める表面被覆層を形成すれば、直射日光等によるヘルメットの内側の温度上昇を防止することができると共に、塗装の欠けや剥がれ等が生じずに従来の塗装と同等な耐久性を得ることができることを究明して本発明を完成したのである。
【００１１】
即ち本発明は、ヘルメット本体の少なくとも外側の面に、チタン酸化物と雲母とアクリル樹脂とから成る反射下地層と、該反射下地層の上面に難燃剤とチタン酸化物と雲母と断熱材とアクリル樹脂とポリウレタン樹脂との共重合体から成る反射断熱層と、該反射断熱層の上面に顔料と脂肪族ウレタン樹脂とから成る表面被覆層とが形成されていることを特徴とする反射断熱性に優れたヘルメットである。
【００１２】
そして、反射下地層の厚さが３０〜５００μｍであったり、反射断熱層の厚さが３０〜４００μｍであったり、表面被覆層の厚さが３０〜３００μｍであったりすれば、より確実にヘルメットの内側の温度上昇を防止することができると共に耐久性が増すことも究明したのである。
【００１３】
【発明の実施の態様】
以下、図面により本発明に係る反射断熱性に優れたヘルメットについて詳細に説明する。
図１は反射断熱性に優れたヘルメットの１実施例の断面説明図、図２は図１のＡ部断面拡大説明図、図３は実施例１及び比較例１のヘルメットの外側の面、内側の面及び内部の温度の変化を示す図である。
【００１４】
図面中、１はヘルメット本体であって、図１及び図２に示す如くその少なくとも外側の面に後述する反射下地層２、反射断熱層３及び表面被覆層４が順次形成されている。このヘルメット本体１と材質してはどのようなものであってもよいが、外側よりの衝撃力に強い硬化プラスティックや繊維強化プラスティック等の材質が好ましく使用される。
【００１５】
２はチタン酸化物と雲母とアクリル樹脂とから成る反射下地層であって、ヘルメット本体１の少なくとも外側の面に形成され、後述する反射断熱層３をこの反射下地層２の上面に形成する際に下地としての役目を果たすと共に、含有されているチタン酸化物及び雲母により後述する反射断熱層３において反射しきれなかった直射日光等を反射させる役目を果たす。
【００１６】
この反射下地層２としては、チタン酸化物と雲母との重量比が１：１〜１.５となるように配分されていて塗装前の液体状態でチタン酸化物と雲母との重量割合が３０〜４０重量％である塗料を塗布乾燥させたものが好ましく使用できる。この反射下地層２の厚さは３０〜５００μｍであれば、確実にヘルメット本体１の内側の温度上昇を防止することができると共に耐久性が増して好ましい。
【００１７】
３は難燃剤とチタン酸化物と雲母と断熱材とアクリル樹脂とポリウレタン樹脂との共重合体から成る反射断熱層であって、反射下地層２の上面に形成され、含有されているチタン酸化物及び雲母により直射日光等を反射する役目を果たすと共に、含有されている難燃剤及び断熱材によりヘルメットの外側の面の熱が内側へ伝導しないように断熱する役目を果たす。
【００１８】
この反射断熱層３としては、チタン酸化物と雲母との重量比が１：２〜２.５となるように配分されていて塗装前の液体状態でチタン酸化物と雲母との重量割合が１５〜２５重量％である塗料を塗布乾燥させたものが好ましく使用できる。この場合、難燃剤の重量はチタン酸化物の重量と略同程度であればよい。この反射断熱層３の厚さは３０〜４００μｍであれば、確実にヘルメットの内側の温度上昇を防止することができると共に耐久性が増して好ましい。
【００１９】
４は顔料と脂肪族ウレタン樹脂とから成る表面被覆層であって、反射断熱層３の上面に形成され、反射下地層２及び反射断熱層３を風雨等より保護し耐久性を高める役目を果たす。
【００２０】
この表面被覆層４としては、顔料と脂肪性ウレタン樹脂との重量比が１：３.５〜４.５となるように配分されていて脂肪性ウレタン樹脂と略同じ重量の溶剤により塗装前の液体状態のものが好ましく使用できる。この表面被覆層４の厚さは３０〜３００μｍであれば、確実にヘルメットの内側の温度上昇を防止することができると共に耐久性が増して好ましい。
【００２１】
【実施例】
次に、実施例及び比較例によって更に本発明に係る反射断熱性に優れたヘルメットについて説明する。
先ず、実施例１として硬化プラスティック製の白色の作業用ヘルメット（品名：ＭＰ型ＰＭ−Ｐ−ＭＰ式Ａ（兼），日栄プラステック（株）社製）のヘルメット本体１の外側の面に、チタン酸化物：１５重量％と、雲母：２０％と、アクリル樹脂：４５重量％と、精製水：２０重量％とから成る反射下地塗料（品名：スーパーベース，スーペリアプロダクトインターナショナル社製）を塗布し１時間３０分放置して乾燥させることにより厚さ２５０μｍの反射下地層２を形成した。次いで、この反射下地層２の上面に、難燃剤：６重量％と、チタン酸化物：６重量％と、雲母：１４重量％と、断熱材：２４重量％と、アクリル樹脂：３０重量％と、ポリウレタン樹脂：１０重量％と、精製水：１０重量％とから成る反射断熱塗料（品名：スーパーサーム，スーペリアプロダクトインターナショナル社製）を塗布し７２時間放置して乾燥させることにより厚さ３００μｍの反射断熱層３を形成した。しかる後に、顔料：１１重量％と、脂肪族ウレタン樹脂：４４重量％と、溶剤：４５％とから成る基材（品名：エナモグリップ，スーペリアプロダクトインターナショナル社製）と硬化剤とを基材３：硬化剤１の割合で混合し３０分放置して表面被覆塗料を作製した後に、反射断熱層３の上面にこの表面被覆塗料を塗布し２時間３０分放置して乾燥させることにより厚さ２００μｍの表面被覆層４を形成して、反射断熱性に優れたヘルメットを作製した。
また、比較例１として実施例１に使用した無加工の状態の硬化プラスティック製の白色の作業用ヘルメットを使用した。
【００２２】
この実施例１及び比較例１のヘルメットを同日・同時刻に直射日光が当たる屋外に放置し、それぞれのヘルメットの外側の面の頭頂部、内側の面の頭頂部及び内側の面の頭頂部より１．５ｃｍ下方の内部に温度センサを設置して３０分毎にそれぞれの部位の温度を計測する反射断熱性能試験を行った。この反射断熱性能試験の結果を表１として示すと共に、実施例１及び比較例１のヘルメットの反射断熱性能の差を比較し易いようにそれぞれの部位の温度の計測値をグラフにしたものを図３として示す。尚、表１及び図３においては、外側の面の頭頂部の温度を外側温度と、内側の面の頭頂部の温度を内側温度と、内側の面の頭頂部より１．５ｃｍ下方の内部の温度を内部温度として表示した。
【００２３】
【表１】

Figure 0003946616
【００２４】
上記の反射断熱性能試験の結果より、実施例１の外側温度、内側温度及び内部温度は総ての時間帯において比較例１の外側温度、内側温度及び内部温度よりも低いと共に実施例１の外側温度は比較例１の外側温度と比較して平均して１.８℃、最大で３.０℃低く、実施例１の内側温度は比較例１の内側温度と比較して平均して４.７℃、最大で７.２℃低く、また実施例１の内部温度は比較例１の内部温度と比較して平均して４.３℃、最大で７.８℃低いことが判った。この試験結果からも判るように、本発明に係る反射断熱性に優れたヘルメットは従来のヘルメットと比較して、高い反射断熱性を有していると共に、直射日光等によるヘルメットの内側の温度上昇を防止する効果が優れていることが確認できた。
【００２５】
【発明の効果】
以上に詳述した如く、本発明に係る反射断熱性に優れたヘルメットは、ヘルメット本体の少なくとも外側の面に、塗装する際の下地となると共に直射日光等を反射する反射下地層を形成し、その反射下地層の上面に直射日光等を反射すると共にヘルメットの外側の面の熱が内側へ伝導しないように断熱する共重合体から成る反射断熱層を形成し、更にその反射断熱層の上面に反射下地層及び反射断熱層を保護し耐久性を高める表面被覆層を形成したものであるので、直射日光等によるヘルメットの内側の温度上昇を防止することができると共に、塗装の欠けや剥がれ等が生じずに従来の塗装と同等な耐久性を得ることができるのである。
【００２６】
そして、反射下地層の厚さが３０〜５００μｍであったり、反射断熱層の厚さが３０〜４００μｍであったり、表面被覆層の厚さが３０〜３００μｍであったりすれば、確実にヘルメットの内側の温度上昇を防止することができるのである。
【００２７】
このような効果を奏する本発明に係る反射断熱性に優れたヘルメットは、炎天下で作業を行わなければならない作業者や自動二輪車等の運転者とって大きな恩恵をもたらすものである。
【図面の簡単な説明】
【図１】反射断熱性に優れたヘルメットの１実施例の断面説明図である。
【図２】図１のＡ部断面拡大説明図である。
【図３】実施例１及び比較例１のヘルメットの外側の面、内側の面及び内部の温度の変化を示す図である。
【符号の説明】
１ ヘルメット本体
２ 反射下地層
３ 反射断熱層
４ 表面被覆層[0001]
[Industrial application fields]
The present invention relates to a helmet excellent in reflective heat insulation that prevents the temperature inside the helmet from rising due to direct sunlight.
[0002]
[Prior art]
In general, workers are required to wear helmets to protect their heads at construction sites and factories, and drivers and passengers are required to wear helmets when driving motorcycles and motorbikes. As required by law, workers and drivers must wear helmets to protect their heads regardless of the climatic conditions when working or driving on site.
[0003]
However, especially in sunny weather with strong sunlight, the temperature inside the helmet rises abnormally due to direct sunlight on the outer surface of the helmet, so work with a helmet with an abnormally high temperature inside Since drivers and drivers get muddy by sweat etc., they are not only very hot and uncomfortable, but they can also fall down due to heat stroke or lack of concentration due to heat, resulting in work or driving errors There was a problem that accidents occurred during work and traffic accidents.
[0004]
Therefore, in order to alleviate the temperature rise inside such a helmet, for example, a helmet (see, for example, Patent Document 1 and Patent Document 2) in which an opening such as a ventilation opening is provided to improve ventilation is provided. A helmet (see, for example, Patent Document 3) in which a cold insulation mat is detachably mounted is proposed.
[0005]
However, helmets that have improved ventilation by providing openings such as ventilation openings can alleviate the temperature rise inside the lumet by running air flowing from the openings such as ventilation openings when traveling on a motorcycle or the like. However, there is a drawback that the temperature rise inside the helmet cannot be mitigated because no running wind is generated when the motorcycle is stopped or when there is traffic, and work is done at construction sites and factories. In some cases, the work is often performed in a fixed place, and air hardly flows in from an opening such as a ventilation hole. Therefore, there has been a disadvantage that the temperature rise inside the helmet cannot be reduced.
[0006]
And a helmet with a refrigerated mat detachably mounted inside can relieve the temperature rise inside the helmet within a certain period of time when the cooling agent has a cooling effect. When there is no longer, there is a drawback that the temperature inside the helmet rises rapidly, and if the cooling effect of the cold insulation agent is lost, not only does it have to be replaced with a new cold insulation agent, it also takes time, but also a cold insulation mat There was also a drawback that the weight of the helmet increased by the interior.
[0007]
Moreover, what applied the heat insulation coating to the outer surface of the helmet is proposed (for example, refer patent document 4). However, what kind of heat-insulating paint is effective and suitable for alleviating the temperature rise inside the helmet, and what kind of heat-insulating paint does not cause any paint chipping or peeling without using conventional paints. There has been a drawback that it has not yet been elucidated whether the durability equivalent to painting can be obtained.
[0008]
[Patent Document 1]
JP-A-11-189910 [Patent Document 2]
JP 2002-69738 A (FIG. 8)
[Patent Document 3]
JP 2000-96333 A [Patent Document 4]
Japanese Patent Laid-Open No. 2000-27020
[Problems to be solved by the invention]
An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a helmet excellent in reflective heat insulation that prevents the temperature inside the helmet from rising due to exposure to direct sunlight or the like.
[0010]
[Means for Solving the Problems]
As a result of diligent research to solve the above problems, the present inventor forms a reflective base layer that serves as a base for coating and reflects direct sunlight on at least the outer surface of the helmet body. A reflective heat insulation layer made of a copolymer that reflects direct sunlight etc. on the upper surface and insulates the heat of the outer surface of the helmet from being conducted to the inside is formed. Further, the reflective underlayer and the reflection are formed on the upper surface of the reflective heat insulation layer. By forming a surface coating layer that protects the heat insulation layer and increases durability, it is possible to prevent the temperature inside the helmet from rising due to direct sunlight, etc., and it is equivalent to conventional coating without causing chipping or peeling of the coating The present invention has been completed by investigating that a high durability can be obtained.
[0011]
That is, the present invention provides a reflective base layer composed of titanium oxide, mica and acrylic resin on at least the outer surface of the helmet body, and a flame retardant, titanium oxide, mica, heat insulating material and acrylic on the upper surface of the reflective base layer. Reflective heat insulation comprising a reflective heat insulating layer made of a copolymer of resin and polyurethane resin, and a surface coating layer made of a pigment and an aliphatic urethane resin formed on the upper surface of the reflective heat insulating layer It is an excellent helmet.
[0012]
And if the thickness of a reflective base layer is 30-500 micrometers, the thickness of a reflective heat insulation layer is 30-400 micrometers, or the thickness of a surface coating layer is 30-300 micrometers, it will be a helmet more reliably. It has also been found that the temperature inside can be prevented from rising and durability is increased.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the helmet excellent in reflective heat insulation according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional explanatory view of one embodiment of a helmet excellent in reflective heat insulation, FIG. 2 is an enlarged cross-sectional explanatory view of the A part of FIG. 1, and FIG. 3 is an outer surface and an inner side of the helmet of Example 1 and Comparative Example 1 It is a figure which shows the change of the surface of this, and an internal temperature.
[0014]
In the drawings, reference numeral 1 denotes a helmet body, and as shown in FIGS. 1 and 2, a reflective base layer 2, a reflective heat insulating layer 3 and a surface coating layer 4 to be described later are sequentially formed on at least the outer surface thereof. Any material may be used for the helmet body 1, but a material such as a cured plastic or a fiber reinforced plastic that is strong against an impact force from the outside is preferably used.
[0015]
Reference numeral 2 denotes a reflective base layer made of titanium oxide, mica, and acrylic resin. The reflective base layer 2 is formed on at least the outer surface of the helmet body 1, and a reflective heat insulating layer 3 to be described later is formed on the upper surface of the reflective base layer 2. In addition to serving as a base, the titanium oxide and mica contained therein serve to reflect direct sunlight that could not be reflected by the reflective heat insulating layer 3 described later.
[0016]
The reflective underlayer 2 is distributed so that the weight ratio of titanium oxide to mica is 1: 1 to 1.5, and the weight ratio of titanium oxide to mica is 30 in the liquid state before coating. Those obtained by applying and drying a coating of -40% by weight can be preferably used. If the thickness of this reflective base layer 2 is 30-500 micrometers, while being able to prevent the temperature rise inside the helmet main body 1 reliably, durability increases and it is preferable.
[0017]
Reference numeral 3 denotes a reflective heat insulating layer made of a copolymer of a flame retardant, titanium oxide, mica, a heat insulating material, an acrylic resin, and a polyurethane resin, and is formed on the upper surface of the reflective base layer 2 and contains titanium oxide. In addition, it plays a role of reflecting direct sunlight etc. by the mica, and also plays a role of heat insulation so that the heat of the outer surface of the helmet is not conducted inward by the contained flame retardant and heat insulating material.
[0018]
The reflective heat insulating layer 3 is distributed so that the weight ratio of titanium oxide to mica is 1: 2 to 2.5, and the weight ratio of titanium oxide to mica is 15 in the liquid state before coating. Those obtained by coating and drying a coating of ˜25% by weight can be preferably used. In this case, the weight of the flame retardant may be approximately the same as the weight of the titanium oxide. If the thickness of this reflective heat insulation layer 3 is 30-400 micrometers, while being able to prevent the temperature rise inside a helmet reliably, durability increases and it is preferable.
[0019]
4 is a surface coating layer made of a pigment and an aliphatic urethane resin, which is formed on the upper surface of the reflective heat insulating layer 3 and plays a role of protecting the reflective base layer 2 and the reflective heat insulating layer 3 from wind and rain and improving durability. .
[0020]
The surface coating layer 4 is distributed so that the weight ratio of the pigment and the aliphatic urethane resin is 1: 3.5 to 4.5, and is coated with a solvent having substantially the same weight as that of the aliphatic urethane resin. A liquid state can be preferably used. If the thickness of this surface coating layer 4 is 30-300 micrometers, while being able to prevent the temperature rise inside a helmet reliably, durability increases and it is preferable.
[0021]
【Example】
Next, the helmet excellent in reflective heat insulation according to the present invention will be described with reference to Examples and Comparative Examples.
First, as Example 1, a white working helmet made of hardened plastic (product name: MP type PM-P-MP type A (also), manufactured by Niei Plustech Co., Ltd.) on the outer surface of the helmet body 1, Apply reflective base paint (product name: Superbase, manufactured by Superior Product International) consisting of titanium oxide: 15% by weight, mica: 20%, acrylic resin: 45% by weight, and purified water: 20% by weight. The reflective underlayer 2 having a thickness of 250 μm was formed by allowing to stand for 1 hour and 30 minutes and drying. Next, on the upper surface of the reflective underlayer 2, flame retardant: 6% by weight, titanium oxide: 6% by weight, mica: 14% by weight, heat insulating material: 24% by weight, acrylic resin: 30% by weight Reflective heat insulating paint (product name: Supertherm, manufactured by Superior Product International) consisting of 10% by weight of polyurethane resin and 10% by weight of purified water was applied and allowed to stand for 72 hours to dry to reflect 300 μm thick. The heat insulation layer 3 was formed. Thereafter, a base material (product name: Enamogrip, manufactured by Superior Product International) consisting of 11% by weight of a pigment, 44% by weight of an aliphatic urethane resin, and 45% of a solvent and a curing agent were added to the base material 3: After mixing in the ratio of the curing agent 1 and leaving it for 30 minutes to prepare a surface coating paint, the surface coating paint is applied to the upper surface of the reflective heat insulating layer 3 and left to stand for 2 hours and 30 minutes to dry. The surface coating layer 4 was formed to produce a helmet excellent in reflective heat insulation.
In addition, as a comparative example 1, a white working helmet made of an unprocessed cured plastic used in Example 1 was used.
[0022]
The helmets of Example 1 and Comparative Example 1 were left outdoors on the same day and at the same time and exposed to direct sunlight. From the top of the outer surface of each helmet, the top of the inner surface, and the top of the inner surface. A reflective heat insulation performance test was performed in which a temperature sensor was installed inside 1.5 cm below and the temperature of each part was measured every 30 minutes. The results of this reflective heat insulation performance test are shown in Table 1, and the measured values of the temperatures of the respective parts are graphed so that the difference in the reflective heat insulation performance of the helmets of Example 1 and Comparative Example 1 can be easily compared. Shown as 3. In Table 1 and FIG. 3, the temperature at the top of the outer surface is the outside temperature, the temperature at the top of the inner surface is the inner temperature, and the temperature at the inside 1.5 cm below the top of the inner surface. The temperature was displayed as the internal temperature.
[0023]
[Table 1]
Figure 0003946616
[0024]
From the results of the reflection heat insulation performance test, the outside temperature, the inside temperature, and the inside temperature of Example 1 were lower than the outside temperature, the inside temperature, and the inside temperature of Comparative Example 1 in all time zones, and the outside of Example 1 The temperature is 1.8 ° C. on average compared to the outer temperature of Comparative Example 1 and a maximum of 3.0 ° C. lower, and the inner temperature of Example 1 is 4. It was found that the internal temperature of Example 1 was 7 ° C. and a maximum of 7.2 ° C. lower than that of Comparative Example 1, and the average temperature was 4.3 ° C. and a maximum of 7.8 ° C. lower. As can be seen from the test results, the helmet with excellent reflective heat insulation according to the present invention has higher reflective heat insulation than the conventional helmet, and the temperature rise inside the helmet due to direct sunlight, etc. It has been confirmed that the effect of preventing is excellent.
[0025]
【The invention's effect】
As described in detail above, the helmet excellent in reflective heat insulation according to the present invention forms, on at least the outer surface of the helmet body, a reflective base layer that serves as a base for painting and reflects direct sunlight, etc. A reflective heat insulating layer made of a copolymer that reflects direct sunlight etc. on the upper surface of the reflective underlayer and insulates the heat of the outer surface of the helmet from being conducted inward is formed on the upper surface of the reflective heat insulating layer. Since the surface coating layer that protects the reflective base layer and the reflective heat insulation layer and enhances the durability is formed, it is possible to prevent the temperature rise inside the helmet due to direct sunlight, etc. The durability equivalent to that of the conventional coating can be obtained without the occurrence.
[0026]
And if the thickness of a reflective base layer is 30-500 micrometers, the thickness of a reflective heat insulation layer is 30-400 micrometers, or the thickness of a surface coating layer is 30-300 micrometers, it will be sure of a helmet. It is possible to prevent the temperature rise inside.
[0027]
The helmet having excellent reflective heat insulation properties according to the present invention that exhibits such effects brings great benefits to operators who have to work under hot weather and drivers of motorcycles and the like.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view of one embodiment of a helmet excellent in reflective heat insulation.
FIG. 2 is an enlarged explanatory view of a section A in FIG. 1;
FIG. 3 is a diagram showing changes in temperature on the outer surface, inner surface, and inside of the helmets of Example 1 and Comparative Example 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Helmet body 2 Reflective foundation layer 3 Reflective heat insulation layer 4 Surface coating layer

Claims (4)

ヘルメット本体(１)の少なくとも外側の面に、チタン酸化物と雲母とアクリル樹脂とから成る反射下地層(２)と、該反射下地層の上面に難燃剤とチタン酸化物と雲母と断熱材とアクリル樹脂とポリウレタン樹脂との共重合体から成る反射断熱層(３)と、該反射断熱層の上面に顔料と脂肪族ウレタン樹脂とから成る表面被覆層(４)とが形成されていることを特徴とする反射断熱性に優れたヘルメット。A reflective base layer (2) made of titanium oxide, mica, and acrylic resin is provided on at least the outer surface of the helmet body (1), and a flame retardant, titanium oxide, mica, and a heat insulating material are provided on the upper surface of the reflective base layer. A reflective heat insulating layer (3) made of a copolymer of acrylic resin and polyurethane resin, and a surface coating layer (4) made of a pigment and an aliphatic urethane resin are formed on the upper surface of the reflective heat insulating layer. A helmet with excellent reflective insulation properties. 反射下地層(２)の厚さが、３０〜５００μｍである請求項１に記載の反射断熱性に優れたヘルメット。The helmet excellent in reflective heat insulation according to claim 1, wherein the thickness of the reflective underlayer (2) is 30 to 500 µm. 反射断熱層(３)の厚さが、３０〜４００μｍである請求項１又は２に記載の反射断熱性に優れたヘルメット。The helmet excellent in reflective heat insulation according to claim 1 or 2, wherein the thickness of the reflective heat insulation layer (3) is 30 to 400 µm. 表面被覆層(４)の厚さが、３０〜３００μｍである請求項１から３の何れか１項に記載の反射断熱性に優れたヘルメット。The helmet excellent in reflective heat insulation according to any one of claims 1 to 3, wherein the thickness of the surface coating layer (4) is 30 to 300 µm.
JP2002312536A 2002-10-28 2002-10-28 Helmet with excellent reflective insulation Expired - Fee Related JP3946616B2 (en)

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JP4590945B2 (en) * 2004-06-18 2010-12-01 住友ベークライト株式会社 helmet
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