M424243 五、新型說明： ' 【新型所屬之技術領域】 . 本新型係有關於一種隔熱紙，且特別是有關於一種包 含膽固醇液晶層之隔熱紙。 ^ 【先前技術】 近年來由於工商發達、社會進步，相對提供之產品亦 $ 主要針對便利、確實、經濟實惠為主旨，因此，當前開發 之產品亦比以往更加進步，而得以貢獻社會。 隔熱紙的主要用途是在阻礙熱能的流動。隔熱紙不僅 廣泛使用於各種交通工具上，也大量使用在建築物上。據 統計，在一般的商業大樓中，和空調相關的用電量約佔總 用電量的47%。是故，降低空調的用電需求，對於節省大 樓運作成本是一項很重要的課題。 太陽光中的紅外線部分是自然界最主要的熱原。太陽 • 光（特別是其中的紅外線部分）進入商業大樓内部後，會 使得室内溫度提高。因此，需要空調來降低溫度。 為降低進入建物内的太陽輻射，一般會在商業大樓的 窗戶貼上隔熱紙。然而，隔熱紙除了能夠阻擋太陽光中的 紅外線部分，也會阻擋太陽光中的可見光，而導致商業大 樓内部空間的亮度降低。 由此可見，上述現有的方式，顯然仍存在不便與缺陷， 而有待改進。為了解決上述問題，相關領域莫不費盡心思 來謀求解決之道，但長久以來仍未發展出適當的解決方 3 M424243 射，並保 ’亦成爲 案==何能利用隔熱紙來降低紅外線的入 持可見光的穿透率，實屬 乂 焉屬當别重要研發課題之一 當前相關領域亟需改進的目枳。 【新型内容】 本新=各之-目的是在提供一種隔熱紙 紅外線的入射，並保持可見光的穿透率。 乂降低 為達上述目的’本新型内容之一技術樣態係關於—種 隔熱紙。此隔熱紙包含至少—吸收層以及至少—膽固醇液 晶層。吸收層m收紫外光與紅外光。膽固醇液晶層配 置於吸收層之下’其中膽固醇液日日日層的旋轉_經調整而 使膽固醇液晶層反射紅外光。 根據本新m例’隔熱紙的可見辭均穿透率為 50%至 80%。 根據本新型另一實施例，隔熱紙的紅外光反射率（隔埶 率）為70%至99%。 … 根據本新型再一實施例，膽固醇液晶層係利用塗佈的 方式來形成。 根據本新型又一實施例，吸收層包含金屬層。可用以 形成此金屬層的材料包含至少一種以下金屬：銀、鋁、鎢、 鎂、鉬、鋅、锡、銦、鉻、銻、鈦、鎳、銅、釩、鈷、鐵、 鈮及其合金。 根據本新型另再一實施例，吸收層包含金屬氧化物 層。可用以形成此金屬氧化物層的材料包含至少一種以下 4 M424243 底層配置於吸收層與膽固醇液晶層之間。根據本新型再又 , 一實施例，基底層包含合成纖維PET層以及三醋酸纖維素 (Triacetyl Cellulose，TAC)層的其中至少一者。根據本新型 再另一實施例，隔熱紙更包含抗刮層，其係配置於吸收層 之上，可用以防止隔熱紙被刮傷。 根據本新型再又一實施例，隔熱紙更包含離型層以及 膠層。離型層配置於隔熱紙之最底層，而膠層配置於離型 ' 層之上。在未使用時離型層能夠保護膠層不受髒污.；在使 ® 用時，可移除離型層，並透過膠層將隔熱紙附著於物體上。 為達上述目的，本新型内容之另一技術樣態係關於一 種隔熱紙，此隔熱紙包含基底層、至少一吸收層以及至少 一膽固醇液晶層。基底層包含第一表面以及第二表面，其 中第一表面與第二表面相對配置。吸收層配置於第一表面 之上，並用以吸收紫外光與紅外光。膽固醇液晶層配置於 第二表面之上，其中膽固醇液晶層的螺距經調配以使膽固 φ 醇液晶層反射紅外光。 根據本新型一實施例，基底層可由聚對苯二曱酸二乙 酯或三醋酸纖維素所製成。 根據本新型另一實施例，上述隔熱紙更包含抗刮層。 抗刮層配置於吸收層之上，用以防止隔熱紙被刮傷。 根據本新型再一實施例，上述隔熱紙更包含離型層以 及膠層。離型層配置於隔熱紙之最底層，而膠層配置於離 型層之上。在未使用時離型層能夠保護膠層不受髒污；在 使用時，可移除離型層，並透過膠層將隔熱紙附著於物體 6 M424243 上 因此，根據本新型之技術内容，本新变實施例藉 供厂種卩㊉熱紙’藉以降低紅外線的人射，並保持可見光的 【實施方式】 為了使本揭示内容之敘述更加詳盡與完備，可參 附之圖式及以下所述各種實施例，圖式中相同之號碼= 相同或相似之元件。但所提供之實施例並非用以限制本 型所涵蓋的範圍，而結構運作之描述非用以限制其執行之 順序，任何由元件重新組合之結_，所產生具有均等功效 的裝置’皆為本新型所涵蓋的範圍。 其中圖式僅以說明為目的，並未依照原尺寸作圖。另 一方面，眾所週知的元件與步驟並未描述於實施例中，以 避免對本新型造成不必要的限制。 第1A圖係依照本新型一實施例繪示一種隔熱紙的示 思圖。如第1A圖所示，隔熱紙包含保護層11〇、抗刮層12〇、 吸收層 130、膽固醇液晶（cholesteric Liquid Crystal)層 140、基底層150、膠層160以及離型層170。吸收層120 能夠吸收紫外光與紅外光，而膽固醇液晶層140的旋轉螺 距經改變而使膽固醇液晶層14〇能夠反射紅外光。基底層 150配置於膽固醇液晶層"ο之下。 此外，在吸收層130上方配置了能夠防止隔熱紙被刮 傷的抗到層120。抗到層120上又配置了保護層110，以避 7 M424243 免紙又，傷’並延長隔熱紙的使用年限。膠層16〇具 .有附著性，若直接暴露於環境中，可能會黏附灰塵或其他 •巧蜂勿’而影響其附著性。因此，在隔熱紙的最底層（即膠 層160下方）配置了離型層170，以防止膠層160髒污。 虽吊要將隔熱Μ設於物體（圖中未示）上的時候，可撕除 離型層170以露出膠層16〇，並透過膝層ι6〇使隔熱紙接 著於物體表面。 般而13 ’膽固醇液晶是由多層含有旋光性分子之向 列型液晶堆疊所形成。在這種向列型液晶系統中添加旋光 劑後’液晶系統即產生螺旋結構，當兩個平面上分子的分 子軸方向平行時，其間的距離稱為一個螺距，此螺距將會 決定其反射之光線的波長。因此，可藉由調整螺距’來改 變膽固醇液晶層的反射特性。舉例來說，螺距為約612 nm 的膽固醇液晶層可反射波長約1000 nrn的紅外線；而當螺 距越大時’膽固醇液晶層所反射光線波長也越長。因此， φ 在本新型一實施例中，所用的膽固醇液晶之螺距為約 500-1000 nm，在另一實施例中為約550-900 nm，在又一實 施例中為約600-800 nm。試驗顯示，螺距約612 nm的膽固 醇液晶層140，可有效反射約60%以上的紅外線（波長約 1000 nm)，且其對波長约400-800 nm之可見光的穿透率高 於約80%。由此可知，只要採用具有更大螺距的膽固醇液 晶層，就可以提升其對紅外光的反射效率。 在一實施例中，包含膽固醇液晶層140的隔熱紙之可 見光平均穿透率為50%至80%。在另一實施例中，隔熱紙 8 M424243 如· Fe203或Fe304)、銳氧化物（例如：Nb2〇5)、銦錫氧化 物（Indium tin oxide，IT0)、鋁鋅氧化物（AlUminum Doped Zinc Oxide，AZO)以及錫銻氧化物（Amim〇ny Tin 〇xide, ATO)的其中至少一者。 當可瞭解’以上例示的各種材料並非用以限定本新 型’任何熟習此技藝者’在不脫離本新型之精神和範圍内， 當可選用其他適當材料來形成此金屬層或金屬氧化物層。 ⑨裝作時’可利㈣鍍、蒸鍍或塗佈的方式來形成上 —述金屬層或金屬氧化物。 在不同的實施例中，基底層15〇可為纖維狀基底或膜 狀基底。可湘各種適當的材料來形成所述的基底層150, 這些材料的實施例包括但不限於：聚對苯二甲酸二乙妒 (PET)以及三醋酸纖維素(TAC)層。 曰 第1B至第1E圖係依照本新型其他實施例所綠示 種隔熱紙的配置示意圖。如第圖所示，其相較於第u 籲圖之熱紙’更包含了另一膽固醇液晶層i42以及另 收層132。另一膽固醇液晶層142配置於基底層15〇之下， 而另-吸收層132配置於另一膽固醇液晶層142之下 此需說明的是另-膽固醇液晶層142的作用相同於 液晶層140,而另一吸收層132的作用相同於吸收層 在此不做贅述。 ’ 請參照第1C _ ’其相較於第1A圖之隔熱紙，更 了另-膽固醇液晶層142，另—膽固醇液晶層142配^ 基底層150之下。如第1D圖所示，其相較於第1A圖之隔 M424243 熱紙，更包含了另一吸收層132，另一吸收層132配置於 • 基底層150之下。如上所述，另一膽固醇液晶層142以及 另一吸收層132的作用在此不做贅述。請參照第1E圖，在 另一種實施方式中，基底層150可配置於吸收層130與膽 固醇液晶層140之間。 然而，在一實施例中，吸收層、膽固醇液晶層和基底 層之間位置的配置，可依照實際需求來進行調整，如第2 ' 圖係繪示依照本新型另一實施例的一種隔熱紙的示意圖。 ® 隔熱紙包含保護層210、抗刮層220、第一膽固醇液晶層 240、基底層250、第二膽固醇液晶層242、膠層260以及 離型層270。 於製作上，基底層250包含第一表面以及第二表面， 其中第一表面與第二表面相對配置。第一膽固醇液晶層240 配置於第一表面之上，其中第一膽固醇液晶層240的旋轉 螺距改變得以使第一膽固醇液晶層240反射紅外光。第二 φ 膽固醇液晶層242配置於第二表面之上，其中第二膽固醇 液晶層242的螺距改變得以使第二膽固醇液晶層242反射 紅外光。 此外，抗到層220配置於第一膽固醇液晶層240之上， 用以防止隔熱紙被刮傷，而保護層210配置於抗刮層220 之上，並用以保護隔熱紙，避免隔熱紙受損傷。再者，離 型層270配置於隔熱紙之最底層，而膠層260配置於離型 層270之上，並用以黏接隔熱紙與物體（圖中未示），其中 離型層270用以保護膠層260。 M424243 外光。據此，即可降低紅外線的入射，使得室内的溫度下 降。 第4圖係依照本新型再一實施例繪示一種隔熱紙的太 陽光穿透率曲線圖。第4圖中的曲線是利用隔熱紙，來對 太陽光進行穿透率實驗所得之數據，由圖中可知，本新型 實施例之隔熱紙可以有效地讓太陽光中波長為約400 nm ' 至約800 nm的波段穿透，亦即本新型實施例可以有效地讓 ' 可見光穿透，可見光的穿透率可達約60〜80%。綜合第3、 —4圖的結果可以發現，此處提出的隔熱紙確實能夠有效地 降低紅外線的入射，並同時保持適當的可見光的穿透率。 雖然本新型已以實施方式揭露如上，然其並非用以限 定本新型，任何熟習此技藝者，在不脫離本新型之精神和 範圍内，當可作各種之更動與潤飾，因此本新型之保護範 圍當視後附之申請專利範圍所界定者為準。 φ 【圖式簡單說明】 為讓本新型之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之說明如下： 第1A圖係依照本新型一實施例繪示一種隔熱紙的示 意圖；第1B圖係依照本新型另一實施例繪示一種隔熱紙的 示意圖；第1C圖係依照本新型再一實施例繪示一種隔熱紙 的示意圖；第1D圖係依照本新型又一實施例繪示一種隔 熱紙的示意圖；以及第1E圖係依照本新型再一實施例繪示 一種隔熱紙的示意圖。 13 M424243 第2圖係繪示依照本新型另一實施例的一種隔熱紙的 . 示意圖。 第3圖係繪示依照本新型另一實施例的一種隔熱紙的 太陽光反射率曲線圖。 第4圖係繪示依照本新型再一實施例的一種隔熱紙的 太陽光穿透率曲線圖。 ' 【主要元件符號說明】 鲁110:保護層 120 :抗刮層 130 :吸收層 132 :另一吸收層 140 :膽固醇液晶層 142 :另一膽固醇液晶層 150 :基底層 φ 160 :膠層 170 :離型層 210:保護層 220 :抗刮層 240 :膽固醇液晶層 242 :另一膽固醇液晶層 250 :基底層 260 :膠層 270 :離型層 14M424243 V. New description: ' 【New technology field】 The present invention relates to an insulation paper, and in particular to an insulation paper containing a cholesteric liquid crystal layer. ^ [Prior Art] In recent years, due to the development of industry and commerce and the advancement of society, the products offered are mainly aimed at convenience, reliability, and economics. Therefore, the products currently being developed are more advanced than before and can contribute to society. The main use of thermal insulation paper is to block the flow of thermal energy. Insulation paper is not only widely used in various vehicles, but also used in buildings. According to statistics, in general commercial buildings, the electricity consumption associated with air conditioners accounts for about 47% of the total electricity consumption. Therefore, reducing the electricity demand of air conditioners is an important issue for saving the operating costs of large buildings. The infrared part of the sun is the most important pyrogen in nature. The sun • Light (especially the infrared part of it) enters the interior of the commercial building and causes the room temperature to rise. Therefore, an air conditioner is required to lower the temperature. In order to reduce the amount of solar radiation entering the building, insulation paper is usually placed on the windows of the commercial building. However, in addition to blocking the infrared portion of the sunlight, the insulation paper also blocks visible light in the sunlight, resulting in a decrease in the brightness of the interior space of the commercial building. It can be seen from the above that the above existing methods obviously have inconveniences and defects, and need to be improved. In order to solve the above problems, the relevant fields do not bother to find a solution, but for a long time have not developed a suitable solution 3 M424243 shot, and Paul 'also become a case == how can use insulation paper to reduce infrared The penetration rate of visible light is one of the most important research topics in the current research and development. [New content] This new = each - the purpose is to provide an insulating paper infrared incident, and maintain the visible light transmittance.乂Reducing for the above purpose ‘One of the technical aspects of this novel content relates to a kind of thermal insulation paper. The thermal insulation paper comprises at least an absorbent layer and at least a cholesterol liquid crystal layer. The absorption layer m receives ultraviolet light and infrared light. The cholesteric liquid crystal layer is disposed below the absorbing layer, wherein the rotation of the cholesteric liquid day is adjusted to cause the cholesteric liquid crystal layer to reflect infrared light. According to the new m example, the visible penetration of the thermal insulation paper is 50% to 80%. According to another embodiment of the present invention, the infrared light reflectance (isolation ratio) of the thermal insulation paper is from 70% to 99%. According to still another embodiment of the present invention, the cholesteric liquid crystal layer is formed by coating. According to yet another embodiment of the present invention, the absorbing layer comprises a metal layer. The material that can be used to form the metal layer comprises at least one of the following metals: silver, aluminum, tungsten, magnesium, molybdenum, zinc, tin, indium, chromium, niobium, titanium, nickel, copper, vanadium, cobalt, iron, niobium, and alloys thereof. . According to still another embodiment of the present invention, the absorbing layer comprises a metal oxide layer. The material that can be used to form the metal oxide layer comprises at least one of the following 4 M424243 underlayer disposed between the absorber layer and the cholesteric liquid crystal layer. According to still another embodiment of the present invention, the substrate layer comprises at least one of a synthetic fiber PET layer and a Triacetyl Cellulose (TAC) layer. According to still another embodiment of the present invention, the thermal insulation paper further comprises a scratch resistant layer disposed on the absorbent layer to prevent the thermal insulation paper from being scratched. According to still another embodiment of the present invention, the heat insulating paper further comprises a release layer and a glue layer. The release layer is disposed on the bottommost layer of the insulation paper, and the glue layer is disposed on the release layer. The release layer protects the adhesive layer from dirt when not in use. When used, the release layer can be removed and the insulation paper can be attached to the object through the adhesive layer. In order to achieve the above object, another technical aspect of the present invention relates to an insulating paper comprising a base layer, at least one absorbent layer, and at least one cholesteric liquid crystal layer. The base layer includes a first surface and a second surface, wherein the first surface is disposed opposite the second surface. The absorbing layer is disposed on the first surface and is configured to absorb ultraviolet light and infrared light. The cholesteric liquid crystal layer is disposed on the second surface, wherein the pitch of the cholesteric liquid crystal layer is formulated such that the cholesteric ol liquid crystal layer reflects infrared light. According to an embodiment of the present invention, the base layer may be made of polyethylene terephthalate or cellulose triacetate. According to another embodiment of the present invention, the heat insulating paper further comprises a scratch resistant layer. The scratch-resistant layer is disposed on the absorbing layer to prevent the insulating paper from being scratched. According to still another embodiment of the present invention, the heat insulating paper further comprises a release layer and a glue layer. The release layer is disposed on the bottommost layer of the thermal insulation paper, and the adhesive layer is disposed on the release layer. When not in use, the release layer can protect the adhesive layer from dirt; in use, the release layer can be removed and the thermal insulation paper can be attached to the object 6 M424243 through the adhesive layer. Therefore, according to the technical content of the present invention, The new embodiment is used to reduce the infrared radiation and maintain the visible light by means of the plant's ten hot papers. [Embodiment] In order to make the description of the present disclosure more detailed and complete, the following drawings and the following can be attached. The various embodiments are the same as the same or similar elements. However, the embodiments provided are not intended to limit the scope of the present invention, and the description of the operation of the structure is not intended to limit the order in which it is performed. Any device that is recombined by the component _, the device with equal efficiency is The scope covered by this novel. The drawings are for illustrative purposes only and are not drawn to the original dimensions. On the other hand, well-known components and steps are not described in the embodiments to avoid unnecessarily limiting the present invention. Fig. 1A is a view showing an insulating paper according to an embodiment of the present invention. As shown in Fig. 1A, the thermal insulation paper comprises a protective layer 11 〇, a scratch-resistant layer 12 〇, an absorbing layer 130, a cholesteric liquid crystal layer 140, a base layer 150, a subbing layer 160, and a release layer 170. The absorbing layer 120 is capable of absorbing ultraviolet light and infrared light, and the rotational pitch of the cholesteric liquid crystal layer 140 is changed so that the cholesteric liquid crystal layer 14 反射 can reflect infrared light. The base layer 150 is disposed under the cholesteric liquid crystal layer. Further, an anti-layer 120 capable of preventing the heat insulating paper from being scratched is disposed above the absorbing layer 130. The protective layer 110 is further disposed on the anti-layer 120 to avoid the paper slipping, and to extend the service life of the heat insulating paper. Adhesive layer 16 cookware. It has adhesion. If it is directly exposed to the environment, it may adhere to dust or other cockroaches and affect its adhesion. Therefore, the release layer 170 is disposed on the bottommost layer of the heat insulating paper (i.e., below the glue layer 160) to prevent the glue layer 160 from being soiled. When the sling is to be placed on the object (not shown), the release layer 170 may be peeled off to expose the glue layer 16 〇, and the heat insulating paper may be attached to the surface of the object through the knee layer. The 13' cholesteric liquid crystal is formed by a plurality of nematic liquid crystal stacks containing optically active molecules. After adding an optically active agent to such a nematic liquid crystal system, the liquid crystal system generates a spiral structure. When the molecular axes of the molecules on the two planes are parallel, the distance between them is called a pitch, and the pitch determines the reflection. The wavelength of the light. Therefore, the reflection characteristics of the cholesteric liquid crystal layer can be changed by adjusting the pitch '. For example, a cholesteric liquid crystal layer having a pitch of about 612 nm can reflect infrared rays having a wavelength of about 1000 nrn; and when the pitch is larger, the wavelength of light reflected by the cholesteric liquid crystal layer is longer. Thus, φ In one embodiment of the invention, the pitch of the cholesteric liquid crystal used is about 500-1000 nm, in another embodiment about 550-900 nm, and in yet another embodiment about 600-800 nm. Tests have shown that a cholesteric liquid crystal layer 140 having a pitch of about 612 nm can effectively reflect about 60% or more of infrared light (wavelength of about 1000 nm), and its transmittance to visible light having a wavelength of about 400-800 nm is higher than about 80%. It can be seen that as long as a liquid crystal layer having a larger pitch is used, the reflection efficiency of infrared light can be improved. In one embodiment, the insulating paper comprising the cholesteric liquid crystal layer 140 has a visible light average transmittance of 50% to 80%. In another embodiment, the heat insulating paper 8 M424243 such as Fe203 or Fe304), sharp oxide (for example: Nb2〇5), indium tin oxide (IT0), aluminum zinc oxide (AlUminum Doped Zinc) Oxide, AZO) and at least one of the tin oxides (Amim〇ny Tin 〇xide, ATO). It is to be understood that the various materials exemplified above are not intended to limit the present invention. Any skilled person may use other suitable materials to form the metal layer or metal oxide layer without departing from the spirit and scope of the present invention. 9 When it is installed, it can be formed by plating, vapor deposition or coating to form a metal layer or a metal oxide. In various embodiments, the substrate layer 15 can be a fibrous substrate or a film-like substrate. The substrate layer 150 can be formed from a variety of suitable materials including, but not limited to, polyethylene terephthalate (PET) and cellulose triacetate (TAC) layers.曰 1B to 1E are schematic views showing the arrangement of green insulating paper according to other embodiments of the present invention. As shown in the figure, it further contains another cholesteric liquid crystal layer i42 and an additional layer 132 as compared with the thermal paper of the first drawing. The other cholesteric liquid crystal layer 142 is disposed under the base layer 15 ,, and the other absorbing layer 132 is disposed under the other cholesteric liquid crystal layer 142. It should be noted that the other cholesteric liquid crystal layer 142 functions the same as the liquid crystal layer 140. The other absorption layer 132 has the same function as the absorption layer and will not be described herein. Referring to the 1C _ ', the cholesteric liquid crystal layer 142 and the cholesteric liquid crystal layer 142 are disposed under the base layer 150 as compared with the heat insulating paper of FIG. 1A. As shown in Fig. 1D, the other absorption layer 132 is further included than the M424243 thermal paper of Fig. 1A, and the other absorption layer 132 is disposed under the base layer 150. As described above, the action of the other cholesteric liquid crystal layer 142 and the other absorbing layer 132 will not be described herein. Referring to FIG. 1E, in another embodiment, the base layer 150 may be disposed between the absorbing layer 130 and the cholesteric liquid crystal layer 140. However, in an embodiment, the position of the position between the absorbing layer, the cholesteric liquid crystal layer and the substrate layer can be adjusted according to actual needs. For example, the second embodiment shows an insulation according to another embodiment of the present invention. Schematic of the paper. The thermal insulation paper comprises a protective layer 210, a scratch-resistant layer 220, a first cholesteric liquid crystal layer 240, a base layer 250, a second cholesteric liquid crystal layer 242, a subbing layer 260, and a release layer 270. In fabrication, the base layer 250 includes a first surface and a second surface, wherein the first surface is disposed opposite the second surface. The first cholesteric liquid crystal layer 240 is disposed over the first surface, wherein a change in the rotational pitch of the first cholesteric liquid crystal layer 240 causes the first cholesteric liquid crystal layer 240 to reflect infrared light. The second φ cholesteric liquid crystal layer 242 is disposed over the second surface, wherein the pitch of the second cholesteric liquid crystal layer 242 is changed to cause the second cholesteric liquid crystal layer 242 to reflect infrared light. In addition, the anti-layer 220 is disposed on the first cholesteric liquid crystal layer 240 to prevent the thermal insulation paper from being scratched, and the protective layer 210 is disposed on the scratch-resistant layer 220 to protect the heat-insulating paper from heat insulation. The paper is damaged. Moreover, the release layer 270 is disposed on the bottommost layer of the heat insulation paper, and the glue layer 260 is disposed on the release layer 270 for bonding the heat insulation paper and the object (not shown), wherein the release layer 270 Used to protect the glue layer 260. M424243 Exterior light. According to this, the incidence of infrared rays can be reduced, so that the temperature in the room is lowered. Fig. 4 is a graph showing the solar transmittance of an insulating paper according to still another embodiment of the present invention. The curve in Fig. 4 is the data obtained by using the insulating paper to conduct the transmittance test of sunlight. As can be seen from the figure, the heat insulating paper of the novel embodiment can effectively make the wavelength of sunlight in about 400 nm. The band penetration to about 800 nm, that is, the novel embodiment can effectively allow 'visible light penetration, and the visible light transmittance can reach about 60 to 80%. As a result of combining the figures 3 and 4, it can be found that the heat insulating paper proposed herein can effectively reduce the incidence of infrared rays while maintaining proper transmittance of visible light. Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any one skilled in the art can make various changes and retouchings without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached. BRIEF DESCRIPTION OF THE DRAWINGS In order to make the above and other objects, features, advantages and embodiments of the present invention more obvious, the description of the drawings is as follows: FIG. 1A is a diagram showing an embodiment according to an embodiment of the present invention. FIG. 1B is a schematic view showing an insulating paper according to another embodiment of the present invention; FIG. 1C is a schematic view showing an insulating paper according to another embodiment of the present invention; A schematic view of an insulating paper according to still another embodiment of the present invention; and FIG. 1E is a schematic view showing an insulating paper according to still another embodiment of the present invention. 13 M424243 Fig. 2 is a schematic view showing an insulating paper according to another embodiment of the present invention. Fig. 3 is a graph showing the solar reflectance of an insulating paper according to another embodiment of the present invention. Fig. 4 is a graph showing the solar transmittance of an insulating paper according to still another embodiment of the present invention. ' [Main component symbol description] Lu 110: protective layer 120: scratch-resistant layer 130: absorption layer 132: another absorption layer 140: cholesterol liquid crystal layer 142: another cholesterol liquid crystal layer 150: base layer φ 160: glue layer 170: Release layer 210: protective layer 220: scratch-resistant layer 240: cholesterol liquid crystal layer 242: another cholesterol liquid crystal layer 250: base layer 260: glue layer 270: release layer 14