JPH069949A - Artificial snow and prevention of consolidation of artificial snow - Google Patents
Artificial snow and prevention of consolidation of artificial snowInfo
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- JPH069949A JPH069949A JP17031592A JP17031592A JPH069949A JP H069949 A JPH069949 A JP H069949A JP 17031592 A JP17031592 A JP 17031592A JP 17031592 A JP17031592 A JP 17031592A JP H069949 A JPH069949 A JP H069949A
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、含水状態で凍結させた
水膨潤性ポリマの粒子を素材とする人工雪、及び、その
固化防止方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to artificial snow made from water-swellable polymer particles frozen in a water-containing state, and a method for preventing its solidification.
【0002】[0002]
【従来の技術】従来、この種の人工雪、すなわち、水を
含浸させてゲル化した上で凍結させたポリマの粒子(以
下、凍結ゲル粒子と称す)を個々の雪粒として、これら
凍結ゲル粒子の集積により形成した人工雪では、凍結ゲ
ル粒子は互いにゲルの凍結表面どうしが直接に接触する
状態で集積して雪層を形成していた。2. Description of the Related Art Conventionally, artificial snow of this type, that is, polymer particles that have been impregnated with water and gelated and then frozen (hereinafter referred to as frozen gel particles) are used as individual snow grains. In the artificial snow formed by the accumulation of particles, the frozen gel particles accumulated in a state where the frozen surfaces of the gel were in direct contact with each other to form a snow layer.
【0003】また、この人工雪層をスキー目的等に適す
るように軽く柔らかいものとするには、雪層を切削装置
により細かく切削破砕する方法が採られている。Further, in order to make the artificial snow layer light and soft so as to be suitable for skiing purposes, a method of finely cutting and crushing the snow layer by a cutting device is adopted.
【0004】[0004]
【発明が解決しようとする課題】しかし、この人工雪は
氷点化において次第に固化して硬度が高くなる傾向が強
く、スキー等に適した状態を維持するには前記の切削破
砕処理を高い頻度で実施する必要があった。However, this artificial snow has a strong tendency to gradually solidify and become harder at the time of freezing, and the cutting and crushing treatment is frequently performed in order to maintain a state suitable for skis and the like. Had to be done.
【0005】因みに実験によれば、密度450kg/c
m3 のものでは一般に20時間程度でその硬度が720
kg/cm2 から3000kg/cm2 (木下式硬度
計)にまで上昇することが観測されている。Incidentally, according to the experiment, the density is 450 kg / c.
The hardness of m 3 is generally 720 in about 20 hours.
It has been observed to rise from kg / cm 2 to 3000 kg / cm 2 (Kinoshita hardness meter).
【0006】そして、この固化の原因については、水膨
潤性ポリマに吸収された水分は、ポリマ組成と結合する
結合水、非結合状態の自由水、並びに、その中間でポリ
マ組成と弱い結合状態にある半結合水の三者に分かれて
ゲル中に存在することが知られているが、自由水が通常
の水と同じ凝固点を示すのに対し、結合水は凝固点を示
さず、半結合水は通常の水よりも低い凝固点を示す。With regard to the cause of this solidification, the water absorbed by the water-swellable polymer is changed into bound water that binds to the polymer composition, unbound free water, and in the middle, a weak bound state to the polymer composition. It is known that there are three types of semi-bonded water in the gel, but free water has the same freezing point as normal water, whereas bound water does not have a freezing point and semi-bonded water is It has a lower freezing point than normal water.
【0007】このため、この種の人工雪が一般に氷点下
数度℃に維持されてスキー等の目的に使用されることに
おいて、吸収水中98%程度を占める自由水は凍結固化
状態でゲル中に存在し、また、結合水はポリマ組成との
強い結合で拘束された安定状態にあるのに対し、半結合
水は比較的自由な液相で存在し、互いに直接に接触する
凍結ゲル粒子の表面におけるこの液相半結合水の存在に
より、雪粒としての凍結ゲル粒子どうしの焼結が促進さ
れるためと考えられる。Therefore, when this kind of artificial snow is generally maintained at several degrees below freezing and used for skiing, free water, which occupies about 98% of the absorbed water, is present in the gel in a frozen and solidified state. , And bound water is in a stable state constrained by a strong bond with the polymer composition, whereas semi-bound water exists in a relatively free liquid phase and is at the surface of frozen gel particles in direct contact with each other. It is considered that the presence of the liquid phase semi-bonded water promotes the sintering of the frozen gel particles as snow grains.
【0008】本発明の目的は、凍結ゲル粒子間でのゲル
中半結合水の影響を抑止して、上記の如き固化現象を防
止を図る点にある。An object of the present invention is to suppress the influence of semi-bonded water in the gel between frozen gel particles to prevent the above solidification phenomenon.
【0009】[0009]
【課題を解決するための手段】本発明による人工雪の特
徴構成は、含水状態で凍結させた水膨潤性ポリマの粒子
表面に、前記ポリマに対して非含浸状態にある水の氷結
層を有することにある。The artificial snow according to the present invention is characterized in that the surface of the particles of the water-swellable polymer frozen in a water-containing state has a frozen layer of water that is not impregnated with the polymer. Especially.
【0010】また、本発明による人工雪固化防止方法の
特徴構成は、含水状態で凍結させた水膨潤性ポリマの粒
子を素材とする人工雪において、氷点下状態で前記粒子
の表面に水分を付与して、その付与水分の氷結層を前記
粒子の表面に形成することにある。The characteristic constitution of the method for preventing artificial snow solidification according to the present invention is that artificial snow made of water-swellable polymer particles frozen in a water-containing state is used to apply water to the surface of the particles in a sub-zero state. To form a frozen layer of the applied water on the surface of the particles.
【0011】[0011]
【作用】つまり、上記の人工雪構成では、ポリマに対し
て非含浸状態にある水の氷結層、すなわち、ゲル外にあ
ってゲル中のゲル構成水(結合水、半結合水、自由水)
とは区別される水で氷点下において全体が凍結状態とな
る水の氷結層により、凍結ゲル粒子の表面が覆われ、し
たがって、氷点下において凍結ゲル粒子中に液相の半結
合水が存在しても、その液相半結合水はゲル表面の氷結
層に閉じ込められた状態で、他の凍結ゲル粒子に対する
接触が阻止される。In other words, in the above-mentioned artificial snow structure, the frozen layer of water that is not impregnated into the polymer, that is, the gel-forming water (bound water, semi-bonded water, free water) outside the gel and in the gel
The surface of the frozen gel particles is covered by a frozen layer of water that is totally frozen below freezing with water that is distinct from, and therefore even if semi-bonded water in the liquid phase is present in the frozen gel particles below freezing. , The liquid phase semi-bound water is confined in the freezing layer on the gel surface, and contact with other frozen gel particles is blocked.
【0012】また、上記の固化防止方法では、含水状態
で凍結させた水膨潤性ポリマの粒子の表面(すなわち、
凍結ゲル粒子の表面)に氷点下で水分を付与することに
より、この付与水分を凍結ゲル粒子の表面で凍結させ、
これにより、ポリマに対して非含浸状態にある水の氷結
層、すなわち、凍結ゲル粒子中の液相半結合水を閉じ込
める氷結層を凍結ゲル粒子の表面に形成する。In the solidification preventing method, the surface of the particles of the water-swellable polymer frozen in the water-containing state (that is,
By applying water below the freezing point to the surface of the frozen gel particles), the applied water is frozen on the surface of the frozen gel particles,
As a result, a frozen layer of water that is not impregnated with the polymer, that is, an frozen layer that traps liquid phase semi-bonded water in the frozen gel particles, is formed on the surface of the frozen gel particles.
【0013】[0013]
【発明の効果】以上、作用の結果、本発明の人工雪、及
び、固化防止方法によれば、液相半結合水の影響による
凍結ゲル粒子どうしの焼結を抑止できて、この焼結によ
る雪層の固化・硬度上昇を効果的に防止でき、これによ
り、スキー等の目的に適した雪状態を長時間にわたって
保ち得るに至り、また、切削粉砕処理の必要頻度を従前
に比べ低減し得るに至った。As described above, as a result of the operation, according to the artificial snow and the method for preventing solidification of the present invention, it is possible to suppress the sintering of the frozen gel particles due to the influence of the liquid phase semi-bonded water. It is possible to effectively prevent the solidification and hardness increase of the snow layer, which makes it possible to maintain the snow condition suitable for the purpose of skiing etc. for a long time, and reduce the frequency of cutting and grinding treatment compared to before. Came to.
【0014】因みに実験によれば、密度450kg/c
m3 のものにおいて硬度が720kg/cm2 から30
00kg/cm2 にまで上昇する固化時間が従来では先
述の如く20時間程度であったのに対し、本発明の適用
により、この固化時間を72時間程度にまで延長でき
た。According to the experiment, the density is 450 kg / c.
hardness of 720 kg / cm 2 to 30 for m 3
Conventionally, the solidification time for increasing the pressure to 00 kg / cm 2 was about 20 hours as described above, but by applying the present invention, the solidification time could be extended to about 72 hours.
【0015】[0015]
【実施例】次に実施例を説明する。EXAMPLES Next, examples will be described.
【0016】図1は屋内人工雪スキー場の設備構成を示
し、1は建屋、2は断熱手段2aを施した傾斜床、3は
傾斜床2のほぼ全面にわたらせて敷設した冷却配管、4
は冷却配管3に循環させる冷媒(例えばブライン)を冷
却する低温冷凍機である。FIG. 1 shows the equipment structure of an indoor artificial snow ski resort, 1 is a building, 2 is a sloping floor provided with heat insulating means 2a, 3 is a cooling pipe laid over substantially the entire surface of the sloping floor 2, 4
Is a low-temperature refrigerator that cools a refrigerant (for example, brine) that circulates in the cooling pipe 3.
【0017】また、5は屋内を温湿度調整する空調設備
であり、減湿手段5a、温調手段5b、加湿手段5cを
備え、屋内からの還気Arと屋外からの取り入れ外気A
oとの混合空気を空調設備5により温湿度調整し、この
温湿度調整空気Asをファン6により屋内に送給する。Numeral 5 is an air-conditioning facility for controlling the temperature and humidity inside the room, which is provided with a dehumidifying means 5a, a temperature adjusting means 5b, and a humidifying means 5c, and which has return air Ar from inside and outside air A from outside.
The temperature and humidity of the air mixed with o is adjusted by the air conditioning equipment 5, and this temperature and humidity adjusted air As is sent indoors by the fan 6.
【0018】7は屋内の温度tr及び相対湿度rを検出
する検出器、8は冷却配管3の冷却温度tpを検出する
検出器であり、9はこれら検出器7,8の検出情報に基
づいて低温冷凍機4及び空調設備5を運転制御する制御
装置である。Reference numeral 7 is a detector for detecting the indoor temperature tr and relative humidity r, 8 is a detector for detecting the cooling temperature tp of the cooling pipe 3, and 9 is based on the detection information of these detectors 7, 8. It is a control device that controls the operation of the low temperature refrigerator 4 and the air conditioning equipment 5.
【0019】雪層の造成については、先ず雪層造成に先
立ち、冷却配管3を埋め込む状態の砂層10を傾斜床2
の上に設けるとともに、散水により砂層10に水を含浸
させ、この含水砂層10を冷却配管3による冷却により
凍結させる。Regarding the formation of the snow layer, first, prior to the formation of the snow layer, the sand layer 10 in which the cooling pipe 3 is embedded is placed on the inclined floor 2.
The sand layer 10 is impregnated with water by sprinkling water, and the water-containing sand layer 10 is frozen by being cooled by the cooling pipe 3.
【0020】そして、水膨潤性ポリマ(1〜2mm程度
の粒状又は不定形材)と水とを別途容器において所定の
混合比で混合し、このポリマと水の混合物をポンプ輸送
により凍結砂層10上に散布する。Then, the water-swellable polymer (granular or amorphous material of about 1 to 2 mm) and water are mixed in a separate container at a predetermined mixing ratio, and the mixture of this polymer and water is pumped onto the frozen sand layer 10. Sprinkle on.
【0021】なお、この散布は、水吸収によりポリマが
完全にゲル化する以前の段階、すなわち、ポリマが水吸
収の途中にある段階で実施し、これにより、完全にゲル
化したものをポンプ輸送するに比べ必要ポンプ動力を低
減する。The spraying is carried out before the polymer is completely gelated by water absorption, that is, the polymer is in the middle of water absorption, whereby the completely gelled polymer is pumped. The required pump power is reduced compared to
【0022】ポリマと水との混合物は厚さ100〜15
0mm程度の層11を成すように散布するが、傾斜床2
上での混合物流下を防止するため、図中破線で示す如き
仮堰12を傾斜床2のほぼ全面において適当な間隔で予
め設けておく。The mixture of polymer and water has a thickness of 100 to 15
It is sprayed so as to form a layer 11 of about 0 mm, but the sloping floor 2
In order to prevent the above-mentioned mixed flow from falling, a temporary weir 12 as shown by the broken line in the figure is provided in advance at an appropriate interval on almost the entire surface of the inclined floor 2.
【0023】水吸収によるポリマのゲル化は傾斜床2上
で進行し、最終的にポリマと水の混合層11はゲル状態
で冷却配管3による冷却により凍結させて、凍結ゲル層
とする。The gelation of the polymer due to water absorption proceeds on the inclined bed 2, and finally the mixed layer 11 of polymer and water is frozen in the gel state by cooling by the cooling pipe 3 to form a frozen gel layer.
【0024】凍結ゲルは凍結に伴う吸収水の膨張力がゲ
ル強度に打ち勝つことで自己破壊を生じ、この自己破壊
により凍結ゲルは細かいクラックが多数生じた粉砕容易
な状態となる。The frozen gel undergoes self-destruction due to the expansive force of absorbed water that accompanies freezing and overcomes the gel strength. Due to this self-destruction, the frozen gel is in a state in which a large number of fine cracks are formed and is easy to pulverize.
【0025】凍結ゲル層11の形成後、前記の仮堰12
は撤去し、その後、凍結ゲル層11の表層部(厚さ15
mm程度)を切削装置により切削破砕し、これにより、
細かい凍結ゲル粒子(粒径0.1〜0.3mm程度)の
積層から成る人工雪層11aを形成する。After forming the frozen gel layer 11, the temporary weir 12 is formed.
Of the frozen gel layer 11 (thickness 15
mm) is crushed and cut by a cutting device.
The artificial snow layer 11a is formed by stacking fine frozen gel particles (particle diameter of about 0.1 to 0.3 mm).
【0026】この人工雪層11aは切削破砕の際に多量
の空気を含むことにより切削処理前に比べ嵩が増し(例
えば厚さ30mm)、天然雪に類似した軽く柔らかい雪
層となる。The artificial snow layer 11a has a larger volume (for example, a thickness of 30 mm) than before the cutting process by containing a large amount of air at the time of cutting and crushing, and becomes a light and soft snow layer similar to natural snow.
【0027】切削処理後、人工雪層11aに対し適量の
水を散布して、雪層11aを構成する凍結ゲル粒子の表
面に水分を付与し、この付与水分を冷却配管3による雪
層冷却下で凍結させることにより、図2に模式的に示す
如く、個々の凍結ゲル粒子Gの表面(すなわち、含水状
態で凍結したポリマの粒子表面)に、ポリマに対して非
含浸状態にある水の氷結層、すなわち、ゲル外にあって
ゲル中のゲル構成水(結合水、半結合水、自由水)とは
区別される水の氷結層cを形成する。After the cutting treatment, an appropriate amount of water is sprinkled on the artificial snow layer 11a to add water to the surface of the frozen gel particles forming the snow layer 11a, and the added water is cooled by the cooling pipe 3 in the snow layer. As shown schematically in FIG. 2, the frozen water is frozen on the surface of each frozen gel particle G (that is, the particle surface of the polymer frozen in the water-containing state) to freeze the water that is not impregnated with the polymer. A layer, that is, an ice layer c of water outside the gel and distinguished from the gel-constituting water (bound water, semi-bound water, free water) in the gel is formed.
【0028】つまり、凍結ゲル粒子G中に凝固点の低い
液相の半結合水が存在しても、その液相半結合水を上記
の氷結層cに閉じ込めた状態とすることで、液相半結合
水により凍結ゲル粒子Gどうしの焼結が促進されること
を防止し、これにより、焼結による雪層の固化・硬度上
昇を抑止して、スキー目的に適した雪状態を長時間にわ
たって保つようにする。That is, even if liquid phase semi-bonded water having a low freezing point is present in the frozen gel particles G, the liquid phase semi-bonded water is kept in the above-mentioned freezing layer c so that the liquid phase The binding water is prevented from promoting the sintering of the frozen gel particles G to each other, whereby the solidification and the hardness increase of the snow layer due to the sintering are suppressed, and the snow condition suitable for the ski purpose is maintained for a long time. To do so.
【0029】なお、付与水分の凍結による凍結ゲル粒子
Gどうしの結合が見られる場合には、必要に応じて再
度、切削装置による切削処理を施し、これにより、付与
水分の凍結による凍結ゲル粒子Gどうしの結合を破壊し
て初期の切削処理後と同等を雪質を回復する。If the frozen gel particles G are bound to each other due to the freezing of the applied water, the cutting process is performed again by a cutting device as necessary, whereby the frozen gel particles G due to the freezing of the applied water. The bond between them is destroyed and the snow quality is restored to the same level as after the initial cutting process.
【0030】また、この再度の切削処理では、付与水分
の氷結層c以外の部分で分断される凍結ゲル粒子Gも一
部生じるが、確率的には、粒子表面における付与水分氷
結層cの存在により半結合水が閉じ込められた状態の凍
結ゲル粒子Gも高い確率で雪層11a中に残存し、これ
により、所期の固化防止は充分に達成される。Further, in this re-cutting process, some frozen gel particles G which are divided by the portion other than the frozen layer c of the imparted moisture are also generated, but stochastically, the imparted moisture frozen layer c exists on the particle surface. Due to this, the frozen gel particles G in which the semi-bonded water is confined also remain in the snow layer 11a with a high probability, whereby the desired solidification prevention is sufficiently achieved.
【0031】一方、スキー場としての使用において、制
御装置9は、屋内温度trが設定値trrとなるよう
に、検出器7による検出屋内温度trと設定値trrと
の偏差Δtrに基づき空調設備5における温調手段5b
の温調出力を調整する。On the other hand, when used as a ski resort, the controller 9 controls the air conditioner 5 based on the deviation Δtr between the indoor temperature tr detected by the detector 7 and the set value trr so that the indoor temperature tr becomes the set value trr. Temperature control means 5b in
Adjust the temperature control output of.
【0032】そして、屋内温度trの設定値trrに
は、屋内者にサーマルショックや不快感を与えない範囲
で、雪層11aの融解抑制に適した低温値を採用する。As the set value trr of the indoor temperature tr, a low temperature value suitable for suppressing melting of the snow layer 11a is adopted within a range that does not cause thermal shock or discomfort to indoor persons.
【0033】屋内温度調整に並行して、制御装置9は検
出器7による検出屋内温度tr、及び、雪層表面温度t
sの設定値tssに基づき、冷却配管3から雪層表面に
至る間の熱伝導率や雪層表面と空気との間の熱伝達率を
考慮した演算により、雪層11aの表面温度tsが設定
値tssとなるような冷却配管3の冷却温度tppを算
出し、この算出冷却温度tppを目標冷却温度として、
冷却配管3の冷却温度tpがその目標冷却温度tppと
なるように、検出器8による検出冷却温度tpと算出冷
却温度tppとの偏差Δtpに基づき低温冷凍機4の冷
却出力を調整する。In parallel with the indoor temperature adjustment, the controller 9 controls the indoor temperature tr detected by the detector 7 and the snow layer surface temperature t.
Based on the set value tss of s, the surface temperature ts of the snow layer 11a is set by calculation in consideration of the heat conductivity between the cooling pipe 3 and the snow layer surface and the heat transfer coefficient between the snow layer surface and the air. The cooling temperature tpp of the cooling pipe 3 that gives the value tss is calculated, and the calculated cooling temperature tpp is set as the target cooling temperature,
The cooling output of the low-temperature refrigerator 4 is adjusted based on the deviation Δtp between the cooling temperature tp detected by the detector 8 and the calculated cooling temperature tpp so that the cooling temperature tp of the cooling pipe 3 becomes the target cooling temperature tpp.
【0034】雪層表面温度tsの設定値tssは設定手
段9aに対する設定操作をもって変更できるようにして
あり、一般に雪層表面温度tsが低くなるほど雪層表面
の動摩擦係数が高くなる傾向があるのに対し、上記の冷
却温度調整において雪層表面温度tsの設定値tssを
変更することで、スキーにおける滑走性を調整できるよ
うにしてある。The set value tss of the snow layer surface temperature ts can be changed by setting the setting means 9a. Generally, the lower the snow layer surface temperature ts, the higher the dynamic friction coefficient of the snow layer surface. On the other hand, by changing the set value tss of the snow layer surface temperature ts in the above-mentioned cooling temperature adjustment, the skiing property of the ski can be adjusted.
【0035】また、制御装置9は、検出器7により検出
される屋内の温度trと相対湿度rに基づき屋内空気A
rの露点温度tdを算出して、この算出結果に基づき、
屋内空気Arの露点温度tdを雪層表面温度tsの設定
値tssよりも所定温度Δt(例えばΔt=1℃de
g)だけ高い値に調整・維持するように、空調設備5に
おける減湿手段5a及び加湿手段5cを制御する。Further, the control device 9 controls the indoor air A based on the indoor temperature tr and the relative humidity r detected by the detector 7.
The dew point temperature td of r is calculated, and based on this calculation result,
The dew point temperature td of the indoor air Ar is higher than the set value tss of the snow layer surface temperature ts by a predetermined temperature Δt (for example, Δt = 1 ° C. de
The dehumidifying means 5a and the humidifying means 5c in the air conditioning equipment 5 are controlled so that the value is adjusted and maintained at a value g) higher.
【0036】つまり、雪層表面温度tsの設定値tss
よりも上記の所定温度Δtだけ高い値を目標露点温度t
dd(=tss+Δt)とし、湿度非調整下において屋
内空気Arの露点温度tdが目標露点温度tdd未満と
なるような状況では、加湿手段5cによる屋内加湿で屋
内空気Arの露点温度tdを目標露点温度tddにまで
高めて、屋内空気Arの露点温度tdが雪層表面温度t
s(=tss)よりも所定温度Δtだけ高い値となるよ
うにすることで、雪層11aから空気中への水分昇華を
防止し、これにより、前記の付与水分氷結層cを維持す
るとともに、水分昇華による雪質の悪化、及び、それに
伴う滑走性の低下を防止する。That is, the set value tss of the snow layer surface temperature ts
A value higher than the above-mentioned predetermined temperature Δt by a target dew point temperature t
dd (= tss + Δt), and in a situation where the dew point temperature td of the indoor air Ar is less than the target dew point temperature tdd when the humidity is not adjusted, the dew point temperature td of the indoor air Ar is set to the target dew point temperature by the indoor humidification by the humidifying means 5c. Increase to tdd, the dew point temperature td of the indoor air Ar is the snow layer surface temperature t
By making the temperature higher than s (= tss) by a predetermined temperature Δt, the sublimation of water from the snow layer 11a into the air is prevented, thereby maintaining the above-mentioned added water freezing layer c, Prevents deterioration of snow quality due to sublimation of water, and deterioration of gliding properties accompanying it.
【0037】また、湿度非調整下において屋内空気Ar
の露点温度tdが目標露点温度tddより高くなるよう
な状況では、減湿手段5aによる屋内減湿で屋内空気A
rの露点温度tdを目標露点温度tddにまで低下させ
て、屋内空気Arの露点温度tdが雪層表面温度ts
(=tss)よりも所定温度Δtだけ高い値となるよう
にすることで、空気中から雪層11a上への過度の水分
凝結・着霜を防止し、これにより、そのような過度の水
分凝結・着霜による雪質の悪化、及び、それに伴う滑走
性の低下を防止する。In addition, indoor air Ar without humidity adjustment
In the situation where the dew point temperature td of A becomes higher than the target dew point temperature tdd, the indoor air A is dehumidified by the dehumidifying means 5a.
The dew point temperature td of r is lowered to the target dew point temperature tdd so that the dew point temperature td of the indoor air Ar becomes equal to the snow layer surface temperature ts.
By making the temperature higher than (= tss) by a predetermined temperature Δt, excessive moisture condensation and frost formation from the air onto the snow layer 11a are prevented, and as a result, such excessive moisture condensation occurs. -Prevent deterioration of snow quality due to frost formation, and deterioration of gliding properties.
【0038】〔別実施例〕次に別実施例を説明する。[Other Embodiment] Another embodiment will be described below.
【0039】含水状態で凍結させた水膨潤性ポリマの粒
子表面(凍結ゲル粒子Gの表面)に、ポリマに対して非
含浸状態の水の氷結層cを形成するに、前述の実施例で
は雪層11aへの散水により粒子表面に水分を付与した
が、これに代えて、雪層上空気Arの加湿や、冷却配管
3の冷却温度調整による雪層表面温度tsの調整等によ
り、雪層上空気Arの露点温度tdを雪層表面温度ts
よりも高くし、これにより、空気中水分を凍結ゲル粒子
Gの表面に着霜させことで、ポリマに対し非含浸状態の
水の氷結層cを凍結ゲル粒子Gの表面に形成する形態を
採用してもよい。In order to form a frozen layer c of water not impregnated in the polymer on the particle surface of the water-swellable polymer frozen in the water-containing state (the surface of the frozen gel particle G), snow is used in the above-mentioned embodiment. Moisture was applied to the surface of the particles by spraying water on the layer 11a, but instead of this, by humidifying the air Ar on the snow layer, adjusting the cooling temperature of the cooling pipe 3 to adjust the snow layer surface temperature ts, etc. The dew point temperature td of the air Ar is compared with the snow layer surface temperature ts.
The temperature is higher than that of the frozen gel particles G, and thereby water in the air is frosted on the surface of the frozen gel particles G to form a frozen layer c of water that is not impregnated in the polymer on the surface of the frozen gel particles G. You may.
【0040】尚、特許請求の範囲の項に図面との対照を
便利にするため符号を記すが、該記入により本発明は添
付図面の構成に限定されるものではない。It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.
【図1】屋内人工雪スキー場の設備構成図[Fig.1] Facility structure diagram of indoor artificial snow ski resort
【図2】雪粒の模式図[Fig. 2] Schematic diagram of snow grains
G 粒子 c 氷結層 G particle c Ice layer
Claims (2)
粒子(G)を素材とする人工雪であって、前記粒子
(G)の表面に、前記ポリマに対して非含浸状態にある
水の氷結層(c)を有する人工雪。1. An artificial snow made of water-swellable polymer particles (G) frozen in a water-containing state as a raw material, wherein the surface of the particles (G) is not impregnated with the polymer. Artificial snow having an ice layer (c).
粒子(G)を素材とする人工雪において、氷点下状態で
前記粒子(G)の表面に水分を付与して、その付与水分
の氷結層(c)を前記粒子(G)の表面に形成する人工
雪の固化防止方法。2. In artificial snow made of water-swellable polymer particles (G) frozen in a water-containing state as a raw material, water is applied to the surface of the particles (G) at a temperature below freezing to freeze the applied water. A method for preventing solidification of artificial snow, which comprises forming a layer (c) on the surface of the particles (G).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17031592A JPH069949A (en) | 1992-06-29 | 1992-06-29 | Artificial snow and prevention of consolidation of artificial snow |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17031592A JPH069949A (en) | 1992-06-29 | 1992-06-29 | Artificial snow and prevention of consolidation of artificial snow |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH069949A true JPH069949A (en) | 1994-01-18 |
Family
ID=15902691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17031592A Pending JPH069949A (en) | 1992-06-29 | 1992-06-29 | Artificial snow and prevention of consolidation of artificial snow |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH069949A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2455431A1 (en) | 2003-10-23 | 2012-05-23 | Fujifilm Corporation | Ink and ink set for inkjet recording |
CN113730897A (en) * | 2021-10-08 | 2021-12-03 | 北京奔流野外运动服装有限公司 | Landing slope |
-
1992
- 1992-06-29 JP JP17031592A patent/JPH069949A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2455431A1 (en) | 2003-10-23 | 2012-05-23 | Fujifilm Corporation | Ink and ink set for inkjet recording |
CN113730897A (en) * | 2021-10-08 | 2021-12-03 | 北京奔流野外运动服装有限公司 | Landing slope |
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