1278557 A7 _ B7 五、發明說明（丨） [發明之詳細說明] [發明所屬之技術領域] 本發明係關於一種可抄紙爲再生紙的防潮紙。 [習知技術] 作爲防潮紙，現今一般係將聚乙嫌、聚丙細、聚氣乙 烯等合成樹脂壓製積層、貼合在基紙上形成防潮層，以賦 予防潮性·防水性。此種防潮紙雖在防潮性方面可發揮充 分的機能，但作爲舊紙回收使用之際其水解離性差，而難 以再利用。是以，在節省資源、有效利用的觀點上來看爲 很大的問題。 相對於此，就可再生的防潮紙而言，已有單獨塗佈蠟 或是塗佈蠟與合成橡膠系膠乳（latex)的混合液以於基紙上 形成防潮層的方法（日本專利特公平3-10759.號），進一步 塗佈丙烯酸系乳液與蠟的混合液以於基紙上形成防潮層的 方法(特公平2-1671號、特願平3-69050號)等被揭示。由 於該等防潮紙之防潮層具有水解離性，故可作爲舊紙再生 [發明所欲解決之課題] 上述可再生之防潮紙，由於組成物之蠟有可能自防潮 層溢出’若將上述使用有蠟之防護紙捲起時，防護層表面 所含之蠟會附著於所抵接之防護紙的內面。是以，防護紙 內面會變得非常滑，防護紙內之包裝物要排整齊時或無法 3 本紙張尺度適用中國國家標準（CNS>A4規格（210 X 297公釐） —-----------S (請先閱讀背面之注意事項再填寫本頁) — III· — — —* 11111111 . 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 1278557 A7 B7 五、發明說明（2·) 對齊、或容易滑落，甚至在包裝重物的情形，於搬運時彼 此滑開而落下等重大的問題也有可能發生。又，如上述溢 出防潮層表面的蠟會造成包裝物的污染此種不佳的情形。 本發明係鑒於上述問題所得之物，其目的在於提供一 種防潮紙，其不含造成上述不佳原因的蠟，且可作爲舊紙 再生時。 [用以解決課題之手段] 用以解決上述課題之本發明係具有基紙與防潮層之防 潮紙，前述防潮層係由含有合成橡膠系膠乳與丙烯酸系乳 液之樹脂組成物所形成者。 依據上述手段，藉由讓玻璃移轉溫度較低且柔順的合 成橡膠系膠乳、玻璃移轉溫度較高且硬固丙烯酸系乳液相 互配合，則構成防潮層之樹脂組成物的玻璃移轉溫度可調 整至防潮性與解離性以高層級調和的15°C以上40°C以下。 於是，不但可維持防潮紙所具基本性能的防潮性，亦可作 爲舊紙而輕易地再生。 又，由於不像以往的防潮紙配合有蠟，乃可防止因爲 蠟溢出至防潮層表面所造成的不良影響、即可防止包裝物 的滑落或污染。 又，形成上述防潮層的樹脂組成物中可進一步包含粒 狀塡充劑。此處所指的「粒狀」，正如字面所說代表顆粒 的狀態，具體而言係包含柱狀、金平糖（日本一種糖球）狀 、球狀、木桶狀等；但不包括平板狀、薄板狀、長棒狀等 4 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 一"" "1278557 A7 _ B7 V. DESCRIPTION OF THE INVENTION (Detailed Description of the Invention) [Technical Field of the Invention] The present invention relates to a moisture-proof paper which can be used as a recycled paper. [Conventional Technology] As a moisture-proof paper, a synthetic resin such as polystyrene, polypropylene, or polyethylene is generally laminated and laminated on a base paper to form a moisture barrier layer to impart moisture resistance and water repellency. Although such moisture-proof paper can exert sufficient functions in moisture resistance, it is poorly hydrolyzable when used as an old paper, and it is difficult to reuse it. Therefore, it is a big problem in terms of saving resources and making effective use. On the other hand, in the case of reproducible moisture-proof paper, there has been a method of separately applying a wax or a mixture of a coating wax and a synthetic rubber latex to form a moisture barrier layer on the base paper (Japanese Patent Special Fair 3) Further, a method of further coating a mixed liquid of an acrylic emulsion and a wax to form a moisture barrier layer on a base paper (Japanese Patent Publication No. 2-1671, No. Hei 3-69050) is disclosed. Since the moisture-proof layer of the moisture-proof paper has hydrolytic dispersibility, it can be regenerated as old paper. [Problems to be solved by the invention] The above-mentioned reproducible moisture-proof paper may be caused by the wax of the composition being spilled from the moisture-proof layer. When the waxed protective paper is rolled up, the wax contained on the surface of the protective layer adheres to the inner surface of the abutted protective paper. Therefore, the inside of the protective paper will become very slippery, and the packaging materials in the protective paper should be arranged neatly or not. 3 The paper size is applicable to the Chinese national standard (CNS>A4 specification (210 X 297 mm)—---- -------S (Please read the note on the back and fill out this page) — III· — — —* 11111111 . Ministry of Economic Affairs, Intellectual Property Office, Staff Consumption Cooperative, Printed Economy Ministry, Intellectual Property Office, Staff Consumer Cooperative, Printed 1278557 A7 B7 V. INSTRUCTIONS (2·) Alignment, or easy to slip, even in the case of packaging heavy objects, major problems such as slipping and falling on each other during handling may occur. Also, as described above, the surface of the moisture barrier is overflowing. The present invention is a product obtained in view of the above problems, and an object thereof is to provide a moisture-proof paper which does not contain wax which causes the above-mentioned undesirable causes, and which can be used as an old paper for regeneration. [Means for Solving the Problem] The present invention for solving the above problems is a moisture-proof paper having a base paper and a moisture-proof layer, and the moisture-proof layer is a resin group containing a synthetic rubber latex and an acrylic emulsion. According to the above method, the resin composition constituting the moisture barrier layer is formed by allowing the glass to be transferred to a lower temperature and a soft synthetic rubber latex, a glass transition temperature is high, and a hard-solid acrylic emulsion is blended with each other. The glass transfer temperature can be adjusted to moisture resistance and dissociation at a high level of 15 ° C or more and 40 ° C or less. Therefore, not only can the moisture resistance of the basic properties of the moisture proof paper be maintained, but also can be easily regenerated as old paper. Moreover, since the wax is not blended with the conventional moisture-proof paper, it is possible to prevent the package from slipping or contaminating due to the adverse effect of the wax overflowing onto the surface of the moisture barrier layer. Further, the resin composition forming the moisture barrier layer described above The granules may further comprise a granulated sputum. The "granular" as referred to herein, as the literal means, represents the state of the granules, specifically, columnar, ginseng (Japanese sugar sphere), globular, wooden barrel Shape, etc.; but does not include flat, thin plate, long rod, etc. 4 paper size applies to China National Standard (CNS) A4 specification (210 X 297 mm) a """
1278557 A7 _________B7____ 五、發明說明（$ ) 槪念。藉由配合該等塡充劑，於防潮層中水蒸氣的透過面 積可減小，於是，防潮性得以提昇。又由於防潮層中配合 之塡充劑爲粒狀物，當再生時將該防潮紙剪裁成小片的情 形，將可減低塡充劑對於刀具所造成的損傷的不良影響。 [發明之實施形態] 以下，參照適當的圖式詳細說明本發明之實施形態。 圖1係以示意的方式顯示本發明之一實施形態之防潮紙的 截面圖。圖1之防潮紙1係由基紙2以及防潮層3所構成 構成基紙2之紙素材並無特別的限定，可使用各種的 紙素材。其中，若考慮再生性，則以可藉機械解離作用輕 易分散於水中之物爲佳，可舉出例如闊葉樹牛皮紙漿(kraft pulp)或針葉樹牛皮紙漿等化學紙漿、以機械紙漿爲原料之 道林紙、中質紙、片面亮光牛皮紙、未漂白牛皮紙、牛皮 延伸紙等。該基紙2之單位重量並無特別的限定，可依據 目的在30〜300g/m2左右適宜地選擇。 濟 部 智 慧 財 產 局 員 工 消 費 合 作 社 印 製、 防潮層3係由特定組成之樹脂組成物所形成。構成防 潮層3的樹脂組成物主要爲含有合成橡膠系膠乳與丙烯酸 系乳液之物。與相關之合成橡膠系膠乳以及丙烯酸系乳液 的配合量，在重量比上可設定爲50 ·· 100〜1〇〇 : 50。如此 設定的原因在於，若丙烯酸系乳液的配合比較上述範圍爲 小’則過於柔軟、在水解離性以及阻絕性變差；相反地， 若丙烯酸系乳液之配合比超過上述範圍，則過於堅硬、防 51278557 A7 _________B7____ V. Description of invention ($) Mourning. By blending the lubricants, the water vapor transmission area in the moisture barrier layer can be reduced, and thus the moisture resistance can be improved. Further, since the tamping agent in the moisture barrier layer is a granular material, the moisture-proof paper is cut into small pieces when regenerated, which can reduce the adverse effect of the tamping agent on the damage caused by the cutter. [Embodiment of the Invention] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a moisture proof paper according to an embodiment of the present invention in a schematic manner. The moisture-proof paper 1 of Fig. 1 is composed of a base paper 2 and a moisture-proof layer 3. The paper material constituting the base paper 2 is not particularly limited, and various paper materials can be used. Among them, in consideration of reproducibility, it is preferable that the material can be easily dispersed in water by mechanical dissociation, and examples thereof include chemical pulp such as kraft pulp or conifer kraft pulp, and Daolin forest using mechanical pulp as a raw material. Paper, medium quality paper, one-sided glossy kraft paper, unbleached kraft paper, cowhide extension paper, etc. The basis weight of the base paper 2 is not particularly limited, and may be appropriately selected in the range of 30 to 300 g/m 2 depending on the purpose. The Department of Health, Wealth and Production Bureau, the Consumers' Association, and the moisture-proof layer 3 are formed by a resin composition of a specific composition. The resin composition constituting the moisture-proof layer 3 is mainly a product containing a synthetic rubber latex and an acrylic emulsion. The blending amount of the synthetic rubber latex and the acrylic emulsion may be set to 50 ·· 100 to 1 〇〇 : 50 in terms of weight ratio. The reason for this setting is that if the blending of the acrylic emulsion is smaller than the above range, it is too soft, and the hydrolysis dispersibility and the barrier property are deteriorated. Conversely, if the blending ratio of the acrylic emulsion exceeds the above range, it is too hard. Defense 5
1278557 A7 B7 五、發明說明（w) 護性變差。 再者，形成防潮層3之樹脂組成物的玻璃轉移溫度以 15°C以上40°C以下的範圍的範圍爲佳。當玻璃轉移溫度較 上述範圍爲低之時，因柔軟且延伸率大，此延伸對於解離 時所受之切力會成爲阻力，再者細微的分離、分散困難、 解離性變差。相反地，當玻璃轉移溫度超過上述範圍，雖 變得非常地堅固、易脆、延伸性低，從而解離性變得異常 的良好，惟，在防潮性、尤其是彎折時的防潮性會變差。 是以，構成防潮層3之樹脂組成物的玻璃移轉溫度有必要 介於上述範圍內，特別應介於20°C以上30°C以下的範圍內 〇 經濟部智慧財產局員工消費合作社印製 就上述合成橡膠系膠乳而言，具體上可舉出苯乙烯丁 二烯膠乳、甲基丙烯酸酯丁二烯膠乳、丙烯腈丁二烯乳膠 等，惟考慮耐水性方面良好、延伸率佳、不易因折裂而產 生龜裂，則以苯乙烯丁二烯膠乳爲佳。此處聚合性單體雖 以苯乙烯以及1，3 — 丁二烯爲主體，惟，只要不損及本發明 之目的的範圍內，亦可使用其他可與苯乙烯以及1，3— 丁二 烯進行共聚合的單體。就其他可與苯乙烯以及1，3 — 丁二烯 進行共聚合的單體而言，可舉出(a)a—甲基苯乙烯、乙烯 基甲苯、對特丁基甲苯、氯苯乙烯等芳香族乙烯單體； (b)(甲基)丙烯酸甲酯、（甲基)丙烯酸乙酯、（甲基)丙烯酸丙 酯、（甲基)丙烯酸正戊酯·、（甲基)丙烯酸異戊酯、（甲基)丙 烯酸正己酯、（甲基)丙烯酸2—乙基己酯、（甲基)丙烯酸正 辛酯、（甲基)丙烯酸2—羥基乙酯、（甲基)丙烯酸羥基丙酯 6 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） " " " 1278557 A7 B7 五、發明說明（<) 等（甲基）丙烯酸酯單體；（c)(甲基）丙烯腈等含氰基乙烯性 不飽和單體；（d)丙烯酸環氧丙酯、甲基丙烯酸環氧丙酯等 乙嫌系不飽和酸之環氧丙酯；（e)丙稀基環氧丙酯等不飽和 醇之環氧丙酯；（f)(甲基)丙烯醯胺、N—羥甲基（甲基)丙烯 醯胺、N—丁氧基甲基（甲基)丙烯醯胺等（甲基)丙烯醯胺系 單體等，該等聚合性單體可單獨使用亦可組合2種或2種 以上使用。 作爲上述丙烯酸系乳液，具體上可使用與苯乙烯以及 苯乙烯衍生物、丙烯酸（甲基丙烯酸）、丙烯酸（甲基丙烯酸) 酯等進行共聚合的丙烯共聚物、丙烯一苯乙烯共聚物等共 聚物系。藉由將上述丙烯酸系乳液混合於合成橡膠系膠乳 來使用，得以輕易地將玻璃移轉溫度控制在上述目的範圍 內。 於上述形成防潮層3的樹脂組成物中可進一步配合粒 狀塡充劑。就相關之塡充劑而言，具體上可使用擇自（a)碳 酸鈣、滑石、硫酸鋇、氧化鈦、高嶺土等無機塡充劑；（b) 丙烯樹脂珠、苯乙烯樹脂珠、聚乙烯樹脂珠、尿烷樹脂珠 等有機塡充劑中1種或1種以上之物。如上所述，藉由配 合塡充劑，防潮性得以提昇。 上述塡充劑的粒徑以0.3/zm以上30# m以下爲佳。 其理由在於，若塡充劑的粒徑較上述範圍爲小，則提昇防 潮性的效果有限，相反地，若超過上述範圍，防潮層3表 面會產生凹凸，該防潮層3表面的凸部會對內含物造成損 傷，而有可能於剪斷時對刀具造成損傷等不良的情況。 7 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -------------# (請先閱讀背面之注意事項再填寫本頁) I I I I I I- ·1111111« . 經濟部智慧財產局員工消費合作社印製 1278557 A7 B7 五、發明說明（L) 其次’就該防潮紙1之製造方法說明。首先，於合成 橡膠系膠乳與丙烯酸系乳液的混合物中分散塡充劑來製作 構成防潮層3的樹脂組成物。此時如有必要，亦可將澱粉 、聚乙烯醇等水溶性樹脂作爲保護膠體使用，或添加聚碳 酸等分散劑、消泡劑、界面活性劑、配色調製劑。將以上 述方式所調製之樹脂組成物塗佈於基紙2上，再進行乾燥 ，形成防潮層3。只要乾燥溫度所提供之熱量足以讓樹脂 組成物形成薄膜即可，而可採與一般塗佈紙同等的乾燥條 件。又，爲防止於與基紙2之防潮層3的相反側發生捲曲 ，以進行水塗爲佳。 用以形成上述防潮層3的樹脂組成物塗佈量，換算爲 固形分，以5〜50g/m2的範圍爲佳，又以1〇〜30 g/m2的範圍 爲更佳。若上述塗佈量少於5g/m2，則防護性會大幅地惡 化，若超過50 g/m2則透濕度的提昇會達到最高故並不經 濟。 就用以塗佈上述樹脂組成物的設備而言並無特別的限 定，可使用例如氣刀塗佈機、棒塗機、輥塗機、刮塗機、 堰輥塗機等。特別是，刮塗機、棒塗機、氣刀塗佈機等對 塗佈表面進行刮削(scrape)的塗佈方式，因有促進防潮層3 表面平滑性的傾向，乃爲所希望者。 又，本發明之防潮紙並不限定於上述實施形態’例如 ，亦可於基板2的雙面形成防潮層3 ° 8 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） .------------€ (請先閱讀背面之注意事項再填寫本頁) — — — —— — — —*ir«J— — — — — — — — — . 經濟部智慧財產局員工消費合作社印製 1278557 A7 B7 五、發明說明（ [實施例] 以下，依據實施例詳述本發明，惟，本發明不因該實 施例的記載而在解釋上受到限定。 [實施例1] 將SBR(Tg ; -10°C)100重量份與丙烯酸系乳液(Tg : 65 °C)5〇重量份混合以調製塗佈液，再將此塗佈液塗佈至單 位重量75g/m2之基紙上成2 0 g/m2，得到實施例1之防潮 紙。 [實施例2] 除了混合丙烯酸系乳液75重量份以外，其餘與上述實 施例1同樣，得到了實施例2的防潮紙。 [實施例3] 除了混合丙烯酸系乳液100重量份以外，其餘與上述 實施例1同樣，得到了實施例3的防潮紙。 [實施例4] 除了將SBR 75重量份與丙烯酸系乳液1〇〇重量份混 合以外，其餘與上述實施例1同樣，得到了實施例4的防 潮紙。 9 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -l·----------_錢 (請先閱讀背面之注意事項再填寫本頁) !!丨訂-------線. 經濟部智慧財產局員工消費合作社印製 1278557 A7 B7 五、發明說明（3) [實施例5] 除了混合SBR 50重量份以外，其餘與上述實施例4 同樣，得到了實施例5的防潮紙。 [實施例6] 除了混合SBR 40重量份以外，其餘與上述實施例4 同樣，得到了實施例6的防潮紙。 [實施例7] 除了混合丙烯酸系乳液40重量份以外，其餘與上述 實施例1同樣，得到了實施例7的防潮紙。 [實施例8] 除了混合丙烯酸系乳液20重量份以外·，其餘與上述 實施例1同樣，得到了實施例8的防潮紙。 [比較例1] 除了使用僅以SBR構成之塗佈液以外，其餘與上述實 施例1同樣，得到了比較例1的防潮紙。 [比較例2] 除了使用僅以丙烯酸系乳液構成之塗佈液以外，其餘 與上述實施例1同樣，得到了比較例2的防潮紙。 10 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -------------€ (請先閱讀背面之注意事項再填寫本頁) t---------線- 經濟部智慧財產局員工消費合作社印製 1278557 A7 B7 五、發明說明（1) [特性評價] 使用上述實施例1〜8與比較例1〜2之防潮紙，對構成 該等防潮層的樹脂組成物之玻璃轉移溫度進行測定，再以 下面所示之方法評價透濕度以及解離性。其結果示於表1 〇 (1) 透濕度之測定方法 透濕度係以JIS-Z-0208(B法)測定。又，表1所記載之 數値單位爲g/m2 · 24h。 (2) 解離性之評價方法 於500ml的水中加入試料L5g(紙漿濃度0.3。/。），使用 刀片已磨圓之家庭用攪拌器（國際牌MX—1200G)，於常溫 下解離3分鐘(電壓60V)，接著將此解離之試料以標準篩 網（篩孔28，（590 /z m))進行手篩選，再以印刷加熱器（150 °C，鏡面)乾燥約10分鐘之後，藉目視法確認表面樹脂殘 量，定1mm以下爲〇、1mm〜5mm爲^、5mm以上爲X， 進行3階段評價。 Γ I--------------------訂--I I I I--•線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本纸張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 經濟部智慧財產局員工消費合作社印製 1278557 五、發明說明（π) [表1] \ 樹脂組成物 評價 SBR 丙烯酸系 乳液 Tg 透濕度 解離性 實施例1 100 50 15 26 〇 實施例2 100 75 22 28 〇 實施例3 100 1—00 28 32 〇 實施例4 75 100 33 36 〇 實施例5 50 100 40 39 〇 實施例6 40 100 44 43 〇 實施例7 100 40 11 22 Δ 實施例8 100 20 3 19 〇 比較例1 100 0 -10 15 X 比較例2 0 100 65 73 Δ 由於透濕度在40以下即表示透濕性優異，自上述表1 可看出，實施例1〜8之防潮紙在透濕性以及解離性上皆得 到滿足。 [發明效果] 如上述說明，依據本發明之防潮紙，構成防潮層之樹 脂組成物的玻璃轉移溫度可調整至防潮性與解離性以高層 級調和的l5°c以上4〇°C以下，於是，不但可維持防潮紙所 12 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ：-------------------1 訂-----—線 (請先間讀背面之注意事項存填寫本頁) 1278557 A7 _B7_ 五、發明說明（1() 具基本性能的防潮性，亦可作爲舊紙而輕易地再生。又， 由於不像上述以往的防潮紙配合有蠟，乃可防止因爲蠟溢 出所造成的不良影響、即可防止包裝物的滑落與污染。 [符號說明] 1 防潮紙 2 基紙 3 防潮層 -----------------— J ---------^ (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）1278557 A7 B7 V. INSTRUCTIONS (w) Poor protection. Further, the glass transition temperature of the resin composition forming the moisture barrier layer 3 is preferably in the range of 15 ° C or more and 40 ° C or less. When the glass transition temperature is lower than the above range, the elongation is large due to the softness and the elongation, and the elongation is a resistance to the shear force at the time of dissociation, and fine separation and dispersion are difficult, and the dissociation property is deteriorated. On the other hand, when the glass transition temperature exceeds the above range, it becomes extremely strong, brittle, and has low elongation, so that the dissociation property becomes abnormally good, but the moisture resistance at the time of moisture resistance, especially bending, becomes difference. Therefore, the glass transition temperature of the resin composition constituting the moisture barrier layer 3 is required to be in the above range, and particularly should be in the range of 20 ° C or more and 30 ° C or less, and printed by the Intellectual Property Office of the Intellectual Property Bureau. Specific examples of the synthetic rubber latex include styrene butadiene latex, methacrylate butadiene latex, acrylonitrile butadiene latex, etc., but the water resistance is good, the elongation is good, and it is difficult. A styrene butadiene latex is preferred because of cracking due to cracking. Here, the polymerizable monomer is mainly composed of styrene and 1,3-butadiene, but other styrene and 1,3 - butyl may be used as long as the range of the object of the present invention is not impaired. A monomer in which an alkene is copolymerized. Examples of other monomers copolymerizable with styrene and 1,3-butadiene include (a) a-methylstyrene, vinyltoluene, p-tert-butyltoluene, chlorostyrene, and the like. Aromatic vinyl monomer; (b) Methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, n-amyl (meth)acrylate, isoamyl (meth)acrylate Ester, n-hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-octyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate 6 The paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) """"" 1278557 A7 B7 V. Inventions (<) and other (meth) acrylate monomers; (c) a cyano-containing ethylenically unsaturated monomer such as (meth)acrylonitrile; (d) a glycidyl ester of an ethylenically unsaturated acid such as glycidyl acrylate or glycidyl methacrylate; (e) Glycidyl ester of unsaturated alcohol such as dilute glycidyl ester; (f) (meth) acrylamide, N-hydroxymethyl (meth) acrylamide, N-butoxy (Meth) acrylamide and the like (meth) acrylamide-based monomers, those polymerizable monomers may be used alone or in combination of two or more thereof. Specific examples of the acrylic emulsion include copolymerization of a propylene copolymer or a propylene-styrene copolymer copolymerized with styrene, a styrene derivative, acrylic acid (methacrylic acid), acrylic acid (methacrylic acid) ester or the like. Department. By using the above acrylic emulsion in a synthetic rubber latex, it is possible to easily control the glass transition temperature within the above range of the object. A granular chelating agent may be further blended in the resin composition for forming the moisture barrier layer 3 described above. For the related chelating agent, an inorganic chelating agent selected from (a) calcium carbonate, talc, barium sulfate, titanium oxide, kaolin, etc.; (b) acryl resin beads, styrene resin beads, polyethylene may be specifically used. One or more kinds of organic chelating agents such as resin beads and urethane resin beads. As described above, the moisture resistance is improved by the compounding agent. The particle size of the above-mentioned chelating agent is preferably 0.3/zm or more and 30# m or less. The reason for this is that if the particle size of the chelating agent is smaller than the above range, the effect of improving moisture resistance is limited. Conversely, if it exceeds the above range, irregularities are formed on the surface of the moisture barrier layer 3, and the convex portion on the surface of the moisture barrier layer 3 Damage to the contents, and may cause damage to the tool during cutting. 7 This paper size applies to China National Standard (CNS) A4 specification (210 X 297 mm) -------------# (Please read the note on the back and fill out this page) IIIII I- ·1111111« . Ministry of Economic Affairs Intellectual Property Bureau Staff Consumer Cooperative Printed 1278557 A7 B7 V. Invention Description (L) Next, explain the manufacturing method of the moisture-proof paper 1. First, a resin composition constituting the moisture barrier layer 3 is produced by dispersing a chelating agent in a mixture of a synthetic rubber latex and an acrylic emulsion. At this time, if necessary, a water-soluble resin such as starch or polyvinyl alcohol may be used as a protective colloid, or a dispersing agent such as polycarbonate, an antifoaming agent, a surfactant, or a color matching preparation may be added. The resin composition prepared in the above manner is applied onto the base paper 2, and dried to form the moisture barrier layer 3. As long as the heat supplied by the drying temperature is sufficient for the resin composition to form a film, the drying conditions equivalent to those of the general coated paper can be employed. Further, in order to prevent curling from being formed on the opposite side of the moisture-proof layer 3 of the base paper 2, it is preferred to carry out water coating. The coating amount of the resin composition for forming the moisture-proof layer 3 is preferably in the range of 5 to 50 g/m 2 in terms of solid content, and more preferably in the range of 1 Torr to 30 g/m 2 . If the coating amount is less than 5 g/m2, the protective property is greatly deteriorated, and if it exceeds 50 g/m2, the increase in the moisture permeability is the highest and it is not economical. The apparatus for coating the above resin composition is not particularly limited, and for example, an air knife coater, a bar coater, a roll coater, a knife coater, a roll coater or the like can be used. In particular, a coating method in which a coating surface is scraped by a knife coater, a bar coater, or an air knife coater tends to promote the smoothness of the surface of the moisture barrier layer 3, which is desirable. Further, the moisture-proof paper of the present invention is not limited to the above embodiment. For example, a moisture-proof layer may be formed on both surfaces of the substrate 2. 3 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). .------------€ (Please read the notes on the back and fill out this page) — — ——— — — —*ir«J — — — — — — — —. Economy INTELLIGENT INTELLECTUAL PROPERTY SECTOR WORKING COOPERATION CO., LTD. 1278557 A7 B7 V. DESCRIPTION OF THE INVENTION [Examples] Hereinafter, the present invention will be described in detail based on examples, but the present invention is not limited by the description of the examples. Example 1] 100 parts by weight of SBR (Tg; -10 ° C) was mixed with 5 parts by weight of an acrylic emulsion (Tg: 65 ° C) to prepare a coating liquid, and this coating liquid was applied to a unit weight. The base paper of 75 g/m2 was 20 g/m2 to obtain a moisture-proof paper of Example 1. [Example 2] Example 2 was obtained in the same manner as in Example 1 except that 75 parts by weight of the acrylic emulsion was mixed. Moisture-proof paper. [Example 3] Except that 100 parts by weight of the acrylic emulsion was mixed, the same as in the above Example 1 In the same manner, the moisture-proof paper of Example 3 was obtained. [Example 4] A moisture-proof paper of Example 4 was obtained in the same manner as in Example 1 except that 75 parts by weight of SBR and 1 part by weight of the acrylic emulsion were mixed. 9 This paper scale applies to China National Standard (CNS) A4 specification (210 X 297 mm) -l·----------_ Money (please read the notes on the back and fill out this page)! !丨定-------Line. Ministry of Economic Affairs Intellectual Property Office Staff Consumer Cooperative Printed 1278557 A7 B7 V. Inventive Note (3) [Example 5] Except for 50 parts by weight of SBR, the above examples 4 Similarly, the moisture-proof paper of Example 5 was obtained. [Example 6] A moisture-proof paper of Example 6 was obtained in the same manner as in Example 4 except that 40 parts by weight of SBR was mixed. [Example 7] In addition to mixing acrylic acid The moisture-proof paper of Example 7 was obtained in the same manner as in Example 1 except that 40 parts by weight of the emulsion was obtained. [Example 8] The same procedure as in Example 1 was carried out except that 20 parts by weight of the acrylic emulsion was mixed. The moisture-proof paper of Example 8. [Comparative Example 1] Except that only used as S The moisture-proof paper of Comparative Example 1 was obtained in the same manner as in Example 1 except that the coating liquid composed of BR was used. [Comparative Example 2] The above Example 1 was used except that a coating liquid composed only of an acrylic emulsion was used. Similarly, the moisture-proof paper of Comparative Example 2 was obtained. 10 This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -------------€ (Please read the back first Note: Please fill out this page) t---------Line - Ministry of Economic Affairs Intellectual Property Bureau Staff Consumer Cooperative Printed 1278557 A7 B7 V. Invention Description (1) [Characteristic Evaluation] Using the above Example 1~ 8 and the moisture-proof paper of Comparative Examples 1 and 2, the glass transition temperature of the resin composition constituting the moisture-proof layer was measured, and the moisture permeability and the dissociation property were evaluated by the method shown below. The results are shown in Table 1. 〇 (1) Measurement method of moisture permeability The moisture permeability is measured by JIS-Z-0208 (method B). Further, the unit of the number shown in Table 1 is g/m2 · 24h. (2) Evaluation method of dissociation The sample L5g (pulp concentration 0.3%) was added to 500 ml of water, and the mixture was ground at room temperature for 3 minutes using a rounded household mixer (International Brand MX-1200G). 60V), then the dissociated sample was hand-screened by standard sieve (mesh 28, (590 /zm)), and then dried by printing heater (150 ° C, mirror) for about 10 minutes, visually confirmed The residual amount of the surface resin is 〇, 1 mm to 5 mm, and 5 mm or more, and X is evaluated in three stages. Γ I-------------------- order--III I--• line (please read the notes on the back and fill out this page) Ministry of Economic Affairs Intellectual Property Office staff The consumption cooperative printed this paper scale applies China National Standard (CNS) A4 specification (210 X 297 mm) Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing 1278557 V. Invention description (π) [Table 1] \ Resin composition Evaluation of SBR Acrylic Emulsion Tg Permeability Humidity Dissolution Example 1 100 50 15 26 〇 Example 2 100 75 22 28 〇 Example 3 100 1 00 28 32 〇 Example 4 75 100 33 36 〇 Example 5 50 100 40 39 〇 Example 6 40 100 44 43 〇 Example 7 100 40 11 22 Δ Example 8 100 20 3 19 〇 Comparative Example 1 100 0 -10 15 X Comparative Example 2 0 100 65 73 Δ Since the moisture permeability is 40 or less It is excellent in moisture permeability, and it can be seen from the above Table 1 that the moisture-proof papers of Examples 1 to 8 are satisfied in both moisture permeability and dissociation property. [Effect of the Invention] As described above, according to the moisture-proof paper of the present invention, the glass transition temperature of the resin composition constituting the moisture barrier layer can be adjusted so that the moisture resistance and the dissociation property are at most 15 ° C or more and 4 ° C below the high-grade level. , not only can maintain moisture-proof paper 12 This paper scale applies to China National Standard (CNS) A4 specifications (210 X 297 mm) :-------------------1 Order - ----—Line (please read the back of the note first) Fill in this page 1278557 A7 _B7_ V. Invention Description (1() It has the basic performance of moisture resistance and can be easily regenerated as old paper. Since the wax is not blended with the above-mentioned conventional moisture-proof paper, it is possible to prevent the package from slipping and contaminating due to the adverse effects caused by the wax overflow. [Sign Explanation] 1 Moisture-proof paper 2 Base paper 3 Moisture-proof layer --- --------------— J ---------^ (Please read the notes on the back and fill out this page) Printed by the Ministry of Economic Affairs, Intellectual Property Bureau, Staff Consumer Cooperatives The paper scale applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm)