JP2006348435A - Oil resistant paper - Google Patents

Oil resistant paper Download PDF

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JP2006348435A
JP2006348435A JP2005178293A JP2005178293A JP2006348435A JP 2006348435 A JP2006348435 A JP 2006348435A JP 2005178293 A JP2005178293 A JP 2005178293A JP 2005178293 A JP2005178293 A JP 2005178293A JP 2006348435 A JP2006348435 A JP 2006348435A
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oil
resistant paper
paper
food
density
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Yosuke Yamashita
陽介 山下
Hideki Takagi
秀樹 高木
Makoto Okawa
誠 大河
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Daio Paper Corp
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Daio Paper Corp
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<P>PROBLEM TO BE SOLVED: To provide oil resistant paper having prevented oil redeposition in relation to the oil resistant paper used for a packaging material or a bag for housing an oil-containing material to be housed. <P>SOLUTION: The oil resistant paper has ≥3 rating degree of oil resistance measured by a kit method and ≤100 s air permeability specified by JIS P 8117. The oil resistant paper is provided with unevennesses composed of high-density parts 1a having ≥0.5 mm width and formed of recessed parts and low-density parts 1b formed of protruding parts on the surface side in contact with at least the material to be housed. The weight specified by JIS P 8124 is ≥30 to ≤70 g/m<SP>2</SP>. Thereby, the oil is held in the high-density parts 1a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、油分を含む収容物を収容する包装材や袋に用いられる耐油紙に関する。   The present invention relates to an oil-resistant paper used for a packaging material or a bag for containing an article containing oil.

耐油紙は、油分の浸透を防止する機能を有し、例えば唐揚げやフライ等の惣菜を包装する包装材やファーストフード店でフライドポテトを詰める袋として広く用いられている。耐油紙は、内部に収容された食品から染み出た油分が外側に染み出ず、包装材や袋の外面が油分により汚れることを防止することができる。この耐油紙は、例えば主原料となるパルプにフッ素樹脂等の耐油剤が混合されて形成されている(例えば、特許文献1参照。)。   Oil-resistant paper has a function of preventing the permeation of oil, and is widely used as a packaging material for packaging side dishes such as fried chicken and fries, and as a bag for filling fries in fast food stores. The oil-resistant paper can prevent the oil that has oozed out from the food contained therein from oozing out and prevent the outer surface of the packaging material or bag from being soiled by the oil. This oil-resistant paper is formed, for example, by mixing an oil-resistant agent such as a fluororesin with pulp as a main raw material (see, for example, Patent Document 1).

このような耐油紙を用いた包装材や袋では、耐油剤によって内部に収容された食品から染み出た油分が外側に浸透しないという利点を有するが、油分が耐油紙に浸透しないことから食品と接する内面に油分が付着した状態となる。このため、耐油紙を用いた包装材や袋では、内面に付着した油分が再び食品に付いてしまい、食品の風味や食感を損ねてしまう。これは、包装材や袋の内面と内部に収容された食品との接触面積が大きいほど、食品への油分の再付着が多くなり、食品の風味や食感が著しく低下してしまう。   In such packaging materials and bags using oil-resistant paper, there is an advantage that the oil oozed from the food contained inside by the oil-resistant agent does not penetrate outside, but since the oil does not penetrate into the oil-resistant paper, Oil is attached to the contacting inner surface. For this reason, in the packaging material and bag using oil-resistant paper, the oil adhering to the inner surface is attached to the food again, and the flavor and texture of the food are impaired. This is because the larger the contact area between the inner surface of the packaging material or the bag and the food contained in the bag, the more the oil reattaches to the food, and the flavor and texture of the food are significantly reduced.

特開昭55−142796号公報Japanese Unexamined Patent Publication No. 55-142969

そこで、本発明は、油分の再付着が防止された耐油紙を提供することを目的とする。   Then, an object of this invention is to provide the oil-resistant paper in which the reattachment of the oil component was prevented.

上述した目的を達成する本発明に係る耐油紙は、耐油度がキット法で3級以上であり、JIS P 8117に規定されている透気度が100秒以下であり、少なくとも収容物と接する面側に、幅0.5mm以上の凹部で形成された高密度部と、凸部で形成された低密度部とからなる凹凸が設けられ、JIS P 8124に規定されている坪量が30g/m以上、70g/m以下であることを特徴とする。 The oil-resistant paper according to the present invention that achieves the above-described object has an oil resistance of grade 3 or higher according to the kit method, an air permeability specified in JIS P 8117 is 100 seconds or less, and is at least a surface that comes into contact with the contents. On the side, unevenness consisting of a high density portion formed by a recess having a width of 0.5 mm or more and a low density portion formed by a protrusion is provided, and the basis weight specified in JIS P 8124 is 30 g / m. It is 2 or more and 70 g / m 2 or less.

本発明では、収容物と接する面側に幅0.5mm以上の凹部で形成された高密度部と、凸部で形成された低密度部とからなる凹凸が設けられている。凹部で形成された高密度部には、収容物から染み出した油分が流れ込み、油分を保持することができる。凸部で形成された低密度部は、収容物を支持する。   In this invention, the unevenness | corrugation which consists of a high-density part formed with the recessed part of width 0.5mm or more and the low-density part formed with the convex part is provided in the surface side which contact | connects an accommodation thing. The oil component that has oozed out of the contained material flows into the high-density portion formed by the recesses, and the oil component can be held. The low density part formed by the convex part supports the contents.

本発明では、凹部で形成された高密度部の幅を0.5mm以上とすることによって、収容物と接する面で十分な油分を保持することができる。また、本発明では、凹部で形成された高密度部で油分を保持し、凸部で形成された低密度部で収容物を支持して収容物との接触面積を小さくすることによって、収容物に対する油分の再付着を防止することができる。これにより、本発明では、油分の再付着による収容物の劣化を防止できる。   In the present invention, by setting the width of the high-density portion formed by the recesses to 0.5 mm or more, sufficient oil can be held on the surface in contact with the contents. Further, in the present invention, the oil content is held by the high density portion formed by the concave portion, and the container is supported by the low density portion formed by the convex portion to reduce the contact area with the stored matter, thereby It is possible to prevent the oil from reattaching to the oil. Thereby, in this invention, deterioration of the accommodation by the reattachment of oil can be prevented.

以下、本発明を適用した耐油紙について詳細に説明する。耐油紙1は、図1に示すように、例えば揚げ物や油脂食品等の油分を有する食品2を収容する袋を形成するために用いられる。なお、この耐油紙1は、食品2の包装用に限定されず、例えば保護用のオイルが付着している金属機械部品の包装用や化粧品の包装用に用いてもよい。また、耐油紙1は、包装紙として用いてもよい。   Hereinafter, the oil resistant paper to which the present invention is applied will be described in detail. As shown in FIG. 1, the oil-resistant paper 1 is used to form a bag for containing a food 2 having an oil content such as fried food or oily food. In addition, this oil-resistant paper 1 is not limited to the packaging of food 2, but may be used, for example, for the packaging of metal machine parts to which protective oil is attached or for the packaging of cosmetics. The oil resistant paper 1 may be used as a wrapping paper.

具体的に、耐油紙1は、主原料となるパルプに耐油性を付与するための耐油剤と、この耐油剤をパルプに定着させる定着剤とが混合された紙料を抄造して得られる。パルプには、例えば広葉樹晒クラフトパルプ(L−BKP)や針葉樹晒クラフトパルプ(N−BKP)等の木材パルプが用いられる。L−BKP、N−BKPの中でも、環境への配慮から漂白処理された、特に無塩素漂白された所謂ECF(Element Chlorine Free)パルプやTCF(Total Choline Free)パルプが好ましい。ECFパルプは、塩素を使わず二酸化塩素によって漂白が施されたパルプである。TCFパルプは、オゾンや酸素によって漂白が施されたパルプである。このECFパルプやTCFパルプは、パルプを構成する繊維のセルロースの末端基が酸素により活性化されているため、耐油剤との親和性が高く、より耐油効果が得られる。   Specifically, the oil-resistant paper 1 is obtained by making a paper material in which an oil-resistant agent for imparting oil resistance to pulp as a main raw material and a fixing agent for fixing the oil-resistant agent to the pulp are mixed. Wood pulp such as hardwood bleached kraft pulp (L-BKP) and softwood bleached kraft pulp (N-BKP) is used as the pulp. Among L-BKP and N-BKP, so-called ECF (Element Chlorine Free) pulp and TCF (Total Choline Free) pulp that have been bleached in consideration of the environment, especially bleach-free, are preferable. ECF pulp is a pulp bleached with chlorine dioxide without using chlorine. TCF pulp is pulp that has been bleached with ozone or oxygen. The ECF pulp and the TCF pulp have a high affinity with the oil-resistant agent because the cellulose end groups of the fibers constituting the pulp are activated by oxygen, and a more oil-resistant effect is obtained.

また、耐油紙1は、処分する際に焼却処理されることが殆どである。耐油紙1を焼却処分した場合には、食品2から浸出した油分3が耐油紙1に付着しているため、この油分3により燃焼温度が高温となる。ECFパルプやTCFパルプは、無塩素漂白であるため、焼却時に燃焼温度が高温となっても、ダイオキシン等の塩化物の発生を防止することができる。また、ECFやTCFパルプを用いた場合には、焼却時に耐油紙1を塩素を含む他の焼却物と共に焼却処理した際、排ガス中に含まれる塩化物の量を少なくすることができる。   Further, the oil-resistant paper 1 is mostly incinerated when disposed. When the oil-resistant paper 1 is disposed of by incineration, the oil 3 leached from the food 2 adheres to the oil-resistant paper 1, and the oil 3 makes the combustion temperature high. Since ECF pulp and TCF pulp are chlorine-free bleaching, generation of chlorides such as dioxin can be prevented even when the combustion temperature becomes high during incineration. When ECF or TCF pulp is used, the amount of chloride contained in the exhaust gas can be reduced when the oil-resistant paper 1 is incinerated together with other incinerated substances containing chlorine at the time of incineration.

また、パルプには、ECFパルプやTCFパルプの他に、FAS(二酸化チオ尿素)にて還元漂白された古紙パルプを使用することもできる。FAS漂白された古紙パルプは、従来、耐油紙のパルプとして用いられた塩素漂白されたパルプと比べて耐油剤との親和性が高く、より耐油効果が得られる。   In addition to ECF pulp and TCF pulp, waste paper pulp that is reductively bleached with FAS (thiourea dioxide) can also be used as the pulp. The FAS-bleached waste paper pulp has higher affinity with the oil-resistant agent than the chlorine-bleached pulp conventionally used as the oil-resistant paper pulp, and an oil resistance effect is obtained.

なお、パルプとしては、上述した木材パルプの他に麻や木綿、ケナフ、竹等の非木材パルプ等を用いたり、含有させてもよい。また、木材パルプや非木材パルプの他に、耐油紙1の透気性を調整するために例えばセラミックファイバー、ガラス繊維、炭素繊維、アルミナ繊維等の無機繊維やレーヨン、ポリプロピレン、アクリル繊維、ポリアミド繊維、ポリエステル繊維等の有機繊維を含有させてもよい。これらの木材パルプ、非木材パルプ、無機繊維、有機繊維は、耐油紙1の用途に応じて単独又は適宜組み合わせて混合する。   In addition to the wood pulp described above, non-wood pulp such as hemp, cotton, kenaf, bamboo, or the like may be used or contained as the pulp. In addition to wood pulp and non-wood pulp, in order to adjust the air permeability of the oil-resistant paper 1, for example, inorganic fibers such as ceramic fiber, glass fiber, carbon fiber, alumina fiber, rayon, polypropylene, acrylic fiber, polyamide fiber, Organic fibers such as polyester fibers may be contained. These wood pulp, non-wood pulp, inorganic fiber, and organic fiber are mixed alone or in appropriate combination depending on the use of the oil-resistant paper 1.

耐油剤には、アクリル系樹脂やスチレンブタジエン系樹脂を使用したものが用いられる。耐油剤は、耐油紙1の耐油度がJAPAN TAPPI No.41に規定されるキット法で3級以上となるように、耐油紙1中に含有されている。耐油紙1では、耐油度が3級未満の場合、食品2から染み出た油分3が浸透し、袋の外側に染み出てしまう虞がある。また、耐油剤としては、アクリル系樹脂やスチレンブタジエン系樹脂を使用したものの他に、フッ素樹脂を使用したものを用いてもよい。フッ素樹脂を使用した耐油剤としては、例えば旭硝子株式会社製のアサヒガードAG530及びAG710、住友化学工業株式会社製のスミレーズレジンFP−110、デュポン社製のゾニールRP、チバスペシャリティケミカルズ社製のローダイン2000等がある。   As the oil proofing agent, an acrylic resin or a styrene butadiene resin is used. The oil resistance of the oil resistant paper 1 is that of JAPAN TAPPI No. It is contained in the oil-resistant paper 1 so as to be grade 3 or higher according to the kit method defined in No.41. In the oil-resistant paper 1, when the oil resistance is less than the third grade, there is a possibility that the oil component 3 oozing out from the food 2 penetrates and oozes out to the outside of the bag. Moreover, as an oil-proofing agent, you may use what uses a fluororesin other than what uses acrylic resin and a styrene butadiene type resin. As an oil-proofing agent using a fluororesin, for example, Asahi Guard AG530 and AG710 manufactured by Asahi Glass Co., Ltd., Sumirez Resin FP-110 manufactured by Sumitomo Chemical Co., Ltd., Zonyl RP manufactured by DuPont, Rhodain manufactured by Ciba Specialty Chemicals 2000 etc.

定着剤には、一般に用いられる例えばポリアミド樹脂、ポリアミン樹脂、エビクロルヒドリン樹脂、カチオン性尿素、カチオン性ポリアクリルアミド樹脂、ポリエチレンイミン樹脂等が用いられる。   For the fixing agent, generally used polyamide resin, polyamine resin, shrimp chlorohydrin resin, cationic urea, cationic polyacrylamide resin, polyethyleneimine resin, and the like are used.

なお、耐油紙1には、上述した耐油剤や定着剤の他に、耐水性を付与するサイズ剤や澱粉、填料、消泡剤、紙力増強剤、pH調整剤等が含有されていてもよい。   The oil-resistant paper 1 may contain a sizing agent, starch, filler, antifoaming agent, paper strength enhancer, pH adjuster, etc. that impart water resistance in addition to the above-described oil-resistant agent and fixing agent. Good.

以上の構成からなる耐油紙1は、パルプの混合割合や叩解度、坪量を調整することにより、JIS P 8117に規定される透気度が100秒以下に抄紙されている。耐油紙1では、透気度を100秒以下にすることによって、食品2から出た蒸気を外部に排出することができ、袋の内部に蒸気がこもらず、蒸気による食品2の劣化を防止することができる。耐油紙1では、JIS P 8117に規定される透気度が100秒よりも大きい場合、食品2から出た蒸気が外部へ排出されにくく、蒸気の排出量が少なくなるため、蒸気により食品2が劣化し、食感が劣化してまう。   The oil-resistant paper 1 having the above configuration is paper-made with an air permeability defined in JIS P 8117 of 100 seconds or less by adjusting the mixing ratio, beating degree, and basis weight of the pulp. In the oil-resistant paper 1, by setting the air permeability to 100 seconds or less, the steam emitted from the food 2 can be discharged to the outside, the steam does not stay inside the bag, and the deterioration of the food 2 due to the steam is prevented. be able to. In the oil-resistant paper 1, when the air permeability defined in JIS P 8117 is greater than 100 seconds, the steam emitted from the food 2 is difficult to be discharged to the outside, and the amount of steam discharged is reduced. It will deteriorate and the texture will deteriorate.

以上のような構成からなる耐油紙1には、図2に示すように、少なくとも食品2と接する面側に凹部で形成された密度の高い高密度部1aと、凸部で形成された密度の低い低密度部1bとからなる凹凸が設けられている。この高密度部1a及び低密度部1bは、食品2と接する面の全体に満遍なく例えばストライプ状に形成されている。外側となる他方の面は、平坦に形成されている。   As shown in FIG. 2, the oil-resistant paper 1 having the above-described configuration has a high-density portion 1 a having a high density formed by concave portions at least on the surface side in contact with the food 2 and a density formed by convex portions. Concavities and convexities formed of the low low density portion 1b are provided. The high density portion 1a and the low density portion 1b are uniformly formed, for example, in a stripe shape on the entire surface in contact with the food 2. The other surface on the outside is formed flat.

高密度部1aは、後述する抄紙機のプレスパートにおいて、図2に示すように、食品2と接する面が厚み方向に押圧されることによって耐油紙1が圧縮され、密度が高くなっている。この高密度部1aは、幅が0.5mm以上であり、厚み方向に押圧されて凹部で形成されている。低密度部1bは、食品2と接する面が厚み方向に押圧されず、密度が高密度部1aの密度よりも低くなっている。低密度部1bは、厚み方向に押圧されないため、高密度部1aよりも突出した凸部で形成されている。   As shown in FIG. 2, the high-density portion 1 a has a high density as the oil-resistant paper 1 is compressed by pressing the surface in contact with the food 2 in the thickness direction in a press part of a paper machine to be described later. The high density portion 1a has a width of 0.5 mm or more and is pressed in the thickness direction to be formed as a recess. In the low density portion 1b, the surface in contact with the food 2 is not pressed in the thickness direction, and the density is lower than the density of the high density portion 1a. Since the low density portion 1b is not pressed in the thickness direction, the low density portion 1b is formed as a convex portion protruding from the high density portion 1a.

耐油紙1は、食品2と接する面側に幅0.5mm以上の凹部で形成された高密度部1aと凸部で形成された低密度部1bとが設けられていることによって、図2に示すように、食品2から染み出た油分3が凹部で形成された高密度部1aに流れ込み、この高密度部1aで油分3を保持することができる。また、耐油紙1では、凸部で形成された低密度部1bに食品2が接触しやすくなるため、食品2と接する面の全面に食品2が接することなく、食品2と直接接する面積を小さくすることができる。したがって、耐油紙1では、食品2と直接接する面積が小さく、高密度部1aで油分3を保持することができることから、袋の内面に付いた油分3が再び食品2に付着することを防止することができる。これにより、この耐油紙1では、油分3の再付着による食品2の風味や食感を劣化させることなく、食品2の風味や食感を長持ちさせることができる。   The oil-resistant paper 1 is provided with a high-density portion 1a formed by a concave portion having a width of 0.5 mm or more and a low-density portion 1b formed by a convex portion on the surface side in contact with the food 2 as shown in FIG. As shown, the oil component 3 oozing out from the food 2 flows into the high density portion 1a formed by the concave portions, and the oil content 3 can be held by the high density portion 1a. Moreover, in the oil-resistant paper 1, since the food 2 easily comes into contact with the low density portion 1b formed by the convex portion, the area in direct contact with the food 2 is reduced without the food 2 being in contact with the entire surface in contact with the food 2. can do. Accordingly, the oil-resistant paper 1 has a small area directly in contact with the food 2 and the oil content 3 can be held by the high density portion 1a, so that the oil content 3 attached to the inner surface of the bag is prevented from adhering to the food 2 again. be able to. Thereby, with this oil-resistant paper 1, the flavor and texture of the food 2 can be prolonged without deteriorating the flavor and texture of the food 2 due to the reattachment of the oil 3.

耐油紙1では、高密度部1aの幅を0.5mm以上とすることによって、十分な油分3を保持することができる。一方、高密度部1aの幅が0.5mmより狭い場合には、食品2から染み出た油分3を保持しきれず、保持できなかった油分3が食品2に再付着しやすくなる。耐油紙1では、再付着した油分3により食品2の風味や食感が劣化してしまう。なお、高密度部1aの幅の上限は、収容物によって異なるが、5mm程度がよい。高密度部1aの幅が広すぎる場合には、高密度部1aに食品2が接してしまい、高密度部1aに保持されている油分が再付着してしまう。   In the oil resistant paper 1, the sufficient oil content 3 can be held by setting the width of the high density portion 1a to 0.5 mm or more. On the other hand, when the width of the high-density portion 1a is narrower than 0.5 mm, the oil component 3 that exudes from the food 2 cannot be retained, and the oil component 3 that cannot be retained easily adheres to the food 2 again. In the oil-resistant paper 1, the flavor and texture of the food 2 are deteriorated by the oil 3 adhering again. In addition, although the upper limit of the width | variety of the high-density part 1a changes with things to accommodate, about 5 mm is good. When the width of the high-density part 1a is too wide, the food 2 comes into contact with the high-density part 1a, and the oil component held in the high-density part 1a is reattached.

また、耐油紙1では、食品2と接する面側に形成された幅0.5mm以上の高密度部1aと低密度部1bとからなる凹凸において、幅0.5mm以上の高密度部1aと低密度部1bとの面積比が10:90〜90:10の範囲とされている。耐油紙1では、高密度部1aの面積の割合が食品2と接する面において10よりも小さい場合、高密度部1a部分が少なく、低密度部1b部分が多いため、高密度部1aが食品2から染み出た油分3を保持しきれず、低密度部1bに油分3が残ってしまう。また、この耐油紙1では、低密度部1bが多いため、食品2と接触する面積が大きくなり、高密度部1aで保持しきれなかった油分3が再付着しやすくなる。このような耐油紙1では、食品2に油分3が再付着し、食品2の風味や所謂クリスピー感といわれる「サクッ」とした食感が劣化してしまう。   Moreover, in the oil-resistant paper 1, in the unevenness | corrugation which consists of the high-density part 1a of width 0.5mm or more formed in the surface side which touches the foodstuff 2, and the low-density part 1b, the high-density part 1a of width 0.5mm or more and low The area ratio with respect to the density part 1b is in the range of 10:90 to 90:10. In the oil-resistant paper 1, when the area ratio of the high density portion 1 a is smaller than 10 on the surface in contact with the food 2, the high density portion 1 a becomes smaller than the food 2 because the high density portion 1 a portion is small and the low density portion 1 b portion is large. The oil component 3 oozing out cannot be retained, and the oil component 3 remains in the low density portion 1b. Moreover, in this oil-resistant paper 1, since there are many low density parts 1b, the area which contacts the foodstuff 2 becomes large, and the oil component 3 which could not be hold | maintained in the high density part 1a becomes easy to adhere again. In such an oil-resistant paper 1, the oil 3 is reattached to the food 2, and the flavor of the food 2 and the so-called “crispy” texture are deteriorated.

一方、耐油紙1では、幅0.5mm以上の高密度部1aの面積の割合が食品2と接する面において90よりも大きい場合、高密度部1a部分が多く、低密度部1b部分が少ないため、油分3を保持している高密度部1aに食品2が接触しやすくなる。このような耐油紙1では、油分3を保持している高密度部1aに食品2が接することにより、食品2に油分3が再付着し、食品2の風味やクリスピー感を劣化させてしまう。   On the other hand, in the oil-resistant paper 1, when the ratio of the area of the high density portion 1a having a width of 0.5 mm or more is larger than 90 on the surface in contact with the food 2, the high density portion 1a portion is large and the low density portion 1b portion is small. The food 2 can easily come into contact with the high-density portion 1 a holding the oil 3. In such an oil-resistant paper 1, when the food 2 comes into contact with the high density portion 1 a holding the oil 3, the oil 3 reattaches to the food 2, and the flavor and crispy feeling of the food 2 are deteriorated.

そこで、耐油紙1では、食品2と接する面側に凹部で形成された幅0.5mm以上の高密度部1aと凸部で形成された低密度部1bの面積比が10:90〜90:10となるように、高密度部1aと低密度部1bとを設けることによって、凸部で形成された低密度部1bで食品2を支持し、凹部で形成された高密度部1aで油分3を保持することができる。このような耐油紙1では、食品2と直接接する面積が小さく、表面で油分3を保持することができることから、油分3が食品2に再付着することを防止することができる。これにより、この耐油紙1では、収容した食品2の風味や食感を劣化させることなく、食品2の風味や食感をより長持ちさせることができる。   Therefore, in the oil-resistant paper 1, the area ratio of the high density portion 1a having a width of 0.5 mm or more formed by the concave portion on the surface side in contact with the food 2 and the low density portion 1b formed by the convex portion is 10:90 to 90: By providing the high-density part 1a and the low-density part 1b so as to be 10, the food 2 is supported by the low-density part 1b formed by the convex part, and the oil content 3 by the high-density part 1a formed by the concave part Can be held. Such an oil-resistant paper 1 has a small area in direct contact with the food 2 and can hold the oil 3 on the surface, so that the oil 3 can be prevented from reattaching to the food 2. Thereby, in this oil-resistant paper 1, the flavor and texture of the food 2 can be made longer without deteriorating the flavor and texture of the stored food 2.

なお、耐油紙1では、上述したように高密度部1aと低密度部1bとを食品2と接する面の全体に満遍なくストライプ状に設けることに限定せず、例えば散点状に設けるようにしてもよい。   In the oil-resistant paper 1, as described above, the high density portion 1a and the low density portion 1b are not limited to being provided in a striped shape evenly over the entire surface in contact with the food 2, and for example, provided in a dotted shape. Also good.

また、耐油紙1は、JIS P 8124に規定される坪量が30g/m以上、70g/m以下である。一般に、耐油紙は、収容する物の量や搬送性等に適合した必要とする坪量で抄紙されるか、複数層からなる多層構成で形成することで任意に坪量が決定される。坪量が30g/m以上、70g/m以下の範囲は、例えばファーストフード店の店頭等で消費者が耐油紙1に収容された状態で食品2を受け取ったり、食品2を食したりする際に取り扱いやすく、提供者が食品2を収容する際に作業性が良好となり、最も汎用性が高い。 Further, the oil-resistant paper 1 has a basis weight defined by JIS P 8124 of 30 g / m 2 or more and 70 g / m 2 or less. In general, the oil-resistant paper is made with a required basis weight suitable for the amount of articles to be accommodated, transportability, or the like, or the basis weight is arbitrarily determined by forming a multi-layered structure composed of a plurality of layers. When the basis weight is in the range of 30 g / m 2 or more and 70 g / m 2 or less, for example, the consumer receives the food 2 or eats the food 2 in a state where the consumer is accommodated in the oil-resistant paper 1 at a store in a fast food store or the like. It is easy to handle, and workability is improved when the provider accommodates the food 2, which is the most versatile.

なお、耐油紙1では、坪量が30g/m未満の場合、十分な強度が得られないため、食品2を包装する際に破れてしまったり不具合が生じやすくなる。また、坪量が30g/m未満の場合には、食品2から浸出する油分が透過されてしまう虞があり、透過した油分により外面が汚れたり、滑りやすくなる。 In addition, in the oil-resistant paper 1, when the basis weight is less than 30 g / m 2 , sufficient strength cannot be obtained, and therefore, when the food 2 is packaged, it is easily torn or has a problem. In addition, when the basis weight is less than 30 g / m 2 , there is a possibility that the oil component leached out from the food 2 may be transmitted, and the outer surface becomes dirty or slippery due to the transmitted oil component.

一方、耐油紙1では、坪量が70g/mを超える場合、坪量が高く、十分な厚さが得られるため、食品2から浸出する油分の透過を防止できるが、強度が高くなり過ぎ、包装する際の作業性が悪くなったり、包装された状態で食品2を受け取ったり、食品2を食する際に取り扱いずらくなる。 On the other hand, in the oil-resistant paper 1, when the basis weight exceeds 70 g / m 2 , the basis weight is high and a sufficient thickness can be obtained, so that permeation of oil leached from the food 2 can be prevented, but the strength becomes too high. The workability at the time of packaging is deteriorated, the food 2 is received in a packaged state, or the food 2 is difficult to handle.

上述した耐油紙1は、抄紙機を用いて次のように抄紙する。先ず、抄紙機のストックインレットにおいて、パルプ又は他の繊維を水中に分散させ、耐油剤及び定着剤を添加し混合して所定の紙料を調整する。   The above-described oil-resistant paper 1 is made using a paper machine as follows. First, in a stock inlet of a paper machine, pulp or other fibers are dispersed in water, and an oil resistance agent and a fixing agent are added and mixed to prepare a predetermined paper stock.

次に、調整した紙料をワイヤーパートの漉き網上に噴出する。このワイヤーパートでは、漉き網上で繊維を平均的に絡み合わせ、脱水しながら均一な地合の湿紙を作る。   Next, the adjusted paper stock is spouted onto the wire part of the net. In this wire part, fibers are entangled on a net that is averaged, and wet paper with a uniform texture is made while dewatering.

次に、ワイヤーパートで作られた湿紙をプレスパートの毛布が巻かれたプレスロール間に送り、湿紙から水分を搾り取る。ここで、このプレスパートでは、湿紙の食品2と接する側の面を押圧する一方のプレスロールの毛布に幅方向に沿って凹凸パターンが設けられている。毛布の凹凸パターンは、凸部が幅0.5mm以上であり、凸部が等間隔に形成されている。プレスパートでは、プレスロール間に湿紙が送られることで、水分を搾り取ると共に、一方のプレスロールの凹凸パターンが湿紙を押圧し、凹凸パターンの凸部により湿紙が厚み方向に圧縮され、圧縮された部分の密度が高くなり、幅0.5mm以上の高密度部1aが凹部として形成され、凹凸パターンの凹部により、厚み方向に圧縮されず、高密度部1aよりも密度が低い低密度部1bが凸部として形成される。   Next, the wet paper made of the wire part is fed between press rolls around which the blanket of the press part is wound, and moisture is squeezed out of the wet paper. Here, in this press part, a concavo-convex pattern is provided along the width direction on the blanket of one press roll that presses the surface of the wet paper that contacts the food 2. As for the uneven | corrugated pattern of a blanket, a convex part is 0.5 mm or more in width, and the convex part is formed at equal intervals. In the press part, wet paper is sent between the press rolls to squeeze out moisture, and the uneven pattern of one press roll presses the wet paper, and the wet paper is compressed in the thickness direction by the convex part of the uneven pattern, The density of the compressed portion is increased, the high-density portion 1a having a width of 0.5 mm or more is formed as a concave portion, and the concave portion of the concave-convex pattern is not compressed in the thickness direction, and the density is lower than the high-density portion 1a. The part 1b is formed as a convex part.

次に、プレスパートで凹部で形成された高密度部1aと凸部で形成された低密度部1bとからなる凹凸が形成された湿紙をドライヤーパートに送り、湿紙の凹凸が形成された面とは反対側の面に表面が鏡面仕上げされたヤンキードライヤーの表面を押し当て湿紙を乾燥させる。湿紙は、ヤンキードライヤーの表面を押し当てて乾燥することによって、高い平坦性が得られるため、袋を形成した際に外側となる面の印刷適性が良好となる。以上のようにして、食品2と接する面側に幅0.5mm以上の凹部で形成された高密度部1aと凸部で形成された低密度部1bからなる凹凸が形成され、反対側の面が平坦に形成された耐油紙1が得られる。   Next, the wet paper on which the unevenness formed of the high density portion 1a formed of the concave portion and the low density portion 1b formed of the convex portion is sent to the dryer part to form the unevenness of the wet paper. The wet paper is dried by pressing the surface of the Yankee dryer whose surface is mirror-finished on the surface opposite to the surface. Since wet paper is dried by pressing the surface of the Yankee dryer, high flatness can be obtained, so that the printability of the outer surface when a bag is formed becomes good. As described above, an uneven surface including the high density portion 1a formed by the concave portions having a width of 0.5 mm or more and the low density portion 1b formed by the convex portions is formed on the surface side in contact with the food 2, and the surface on the opposite side. The oil-resistant paper 1 in which is formed flat is obtained.

また、上述した抄紙方法では、パルプ又は他の繊維を水中に分散させたものに耐油剤及び定着剤を混合した紙料を抄紙機で抄紙したが、このことに限定されず、耐油剤が混合されていない紙料を抄紙し湿紙を作り、サイズプレスパートで湿紙の表面に耐油剤を塗布してもよい。   Further, in the paper making method described above, a paper material in which pulp or other fibers are dispersed in water and mixed with an oil resistant agent and a fixing agent is used to make a paper with a paper machine. An uncoated paper may be made to make a wet paper, and an oil-proofing agent may be applied to the surface of the wet paper with a size press part.

耐油紙1は、食品2と接する面側に凹部で形成された幅0.5mm以上の高密度部1aと凸部で形成された低密度部1bとからなる凹凸を設けるにあたって、上述したようにプレスパートのプレスロールに巻かれた毛布に凹凸を設けるだけで高密度部1aと低密度部1bとからなる凹凸を形成することができるため、従来の抄紙工程の中で容易に形成することができる。   As described above, the oil-resistant paper 1 is provided with unevenness including a high density portion 1a having a width of 0.5 mm or more formed by a concave portion and a low density portion 1b formed by a convex portion on a surface side in contact with the food 2. Since it is possible to form irregularities composed of the high density portion 1a and the low density portion 1b simply by providing irregularities on the blanket wound around the press roll of the press part, it can be easily formed in the conventional paper making process. it can.

なお、耐油紙1は、幅0.5mm以上の高密度部1aと低密度部1bとからなる凹凸を設けるにあたって、通常の抄紙工程で抄紙された耐油紙にエンボス加工を施して、高密度部1aと低密度部1bとを形成するようにしてもよい。但し、上述したように抄紙工程中のプレスパートにて高密度部1aと低密度部1bとを形成した場合には、エンボス加工を用いた場合よりも抄紙後の耐油紙1に圧力が加わらないため耐油紙1の強度を低下させることがない。   The oil-resistant paper 1 is embossed on the oil-resistant paper produced in the normal paper making process to provide the unevenness composed of the high-density portion 1a and the low-density portion 1b having a width of 0.5 mm or more. You may make it form 1a and the low density part 1b. However, when the high-density part 1a and the low-density part 1b are formed in the press part during the paper making process as described above, pressure is not applied to the oil-resistant paper 1 after paper making compared to the case where embossing is used. Therefore, the strength of the oil resistant paper 1 is not reduced.

以上のようにして得られた耐油紙1は、耐油度がキット法で3級以上であり、JIS P 8117に規定される透気度が100秒以下であり、食品2と接する面側に幅0.5mm以上の凹部で形成された高密度部1aと凸部で形成された低密度部1bとからなる凹凸が設けられ、JIS P 8124に規定される坪量が30g/m以上、70g/m以下であることから、耐油性を有し、蒸気の排出も良好であり、食品2から染み出た油分3が高密度部1aに流れ込み、高密度部1aで油分3を維持することができる。耐油紙1では、凸部として表れた低密度部1bに食品2が接し易くなるので、袋の内面と食品2との接触面積を小さくすることができる。これにより、耐油紙1では、油分3が食品2に再付着することを防止でき、食品2の風味や食感を劣化させることなく、風味や食感を長持ちさせることができる。 The oil-resistant paper 1 obtained as described above has an oil resistance of grade 3 or higher according to the kit method, an air permeability specified in JIS P 8117 is 100 seconds or less, and has a width on the side in contact with the food 2. Concavities and convexities consisting of a high density portion 1a formed of concave portions of 0.5 mm or more and a low density portion 1b formed of convex portions are provided, and the basis weight defined in JIS P 8124 is 30 g / m 2 or more, 70 g / M 2 or less, oil resistance, good steam discharge, oil 3 that exudes from the food 2 flows into the high density part 1a, and maintains the oil 3 in the high density part 1a Can do. In the oil-resistant paper 1, the food 2 can easily come into contact with the low density portion 1 b that appears as a convex portion, so that the contact area between the inner surface of the bag and the food 2 can be reduced. Thereby, in the oil-resistant paper 1, the oil content 3 can be prevented from re-adhering to the food 2, and the flavor and texture can be prolonged without deteriorating the flavor and texture of the food 2.

また、この耐油紙1では、坪量が30g/m以上、70g/m以下であることから、適切な強度が得られ、食品2を包装する際の作業性や包装された食品2の取り扱いが良好となる。 Moreover, in this oil-resistant paper 1, since the basic weight is 30 g / m 2 or more and 70 g / m 2 or less, appropriate strength is obtained, and workability when packaging the food 2 and the packaged food 2 Handling becomes good.

また、耐油紙1では、食品2と接する面側に設けた高密度部1aと低密度部1bとの面積比が10:90〜90:10であることから、高密度部1aで油分を適切に保持することができ、食品2の風味や劣化をより防止することができる。   Moreover, in the oil-resistant paper 1, since the area ratio of the high density part 1a provided in the surface side which touches the foodstuff 2 and the low density part 1b is 10: 90-90: 10, oil content is appropriate in the high density part 1a. The flavor and deterioration of the food 2 can be further prevented.

また、耐油紙1では、抄紙工程中において、抄紙機のプレスパートにて、プレスロールに装着された毛布に設けられた凹凸を湿紙に押圧して形成するため、エンボスロールを用いた場合のように抄紙後に圧力が加わらないため、十分な強度が得られる。これにより、耐油紙1では、作業性や取り扱いが良好となる。   Further, in the oil resistant paper 1, during the paper making process, the press part of the paper machine is formed by pressing the unevenness provided on the blanket attached to the press roll against the wet paper, so that the embossing roll is used. Thus, since pressure is not applied after papermaking, sufficient strength is obtained. Thereby, in the oil resistant paper 1, workability | operativity and handling become favorable.

また、この耐油紙1では、抄紙する際に高密度部1a及び低密度部1bが形成された面とは反対側の面をヤンキードライヤーの鏡面仕上げされた表面を押し当てて乾燥することによって、高い平坦性が得られるため、外側の面の印刷適性が良好となる。   Moreover, in this oil-resistant paper 1, when making paper, by pressing the surface opposite to the surface on which the high density portion 1a and the low density portion 1b are formed against the mirror-finished surface of the Yankee dryer, Since high flatness is obtained, the printability of the outer surface is good.

以下、本発明の好適な実施例を実験結果に基づいて説明する。   Hereinafter, preferred embodiments of the present invention will be described based on experimental results.

〈実施例1〉
実施例1では、先ず、パルプとしてECF漂白した針葉樹晒クラフトパルプ(N−BKP)のみを用い、このパルプと耐油剤としてチバスペシャリティケミカルズ社製のローダイン2000を20kg/tと、湿潤紙力増強剤(星光PMC社製:WS4024)を20kg/tとを混合して紙料を調整する。次に、調整した紙料をワイヤーパートの漉き網上に噴出し、脱水して湿紙を作る。次に、ワイヤーパートで作られた湿紙をプレスパートの毛布が装着されたプレスロール間に送り、湿紙から水分を搾り取る。ここで、湿紙の一方の面を押圧する一方のプレスロールの毛布には、幅方向に沿って高密度部の幅0.9mmで、高密度部と低密度部との面積比が30:70となる凹凸パターンが設けられている。プレスパートでは、プレスロール間に湿紙を送り、一方のプレスロールの凹凸パターンが湿紙を押圧することで、幅0.9mmの高密度部と低密度部との面積比が30:70からなる凹凸が湿紙の一方の面に形成される。次に、湿紙をドライヤーパートに送り、ヤンキードライヤーの鏡面仕上げされた表面を湿紙の凹凸が設けられている面とは反対側の面に押し当てて湿紙を乾燥する。得られた耐油紙は、耐油度がキット法で3級であり、透気度がJIS P 8117で25秒であり、坪量が30g/mである耐油紙を抄紙した。
<Example 1>
In Example 1, first, only ECF bleached softwood bleached kraft pulp (N-BKP) was used as pulp, and as a pulp and oil resistance agent, 20 kg / t of Rhodine 2000 manufactured by Ciba Specialty Chemicals Co., Ltd., a wet paper strength enhancer. The stock is adjusted by mixing 20 kg / t with (Starlight PMC: WS4024). Next, the adjusted paper stock is jetted onto the wire part of the screen and dehydrated to make wet paper. Next, the wet paper made of the wire part is sent between the press rolls on which the blankets of the press part are mounted, and moisture is squeezed out of the wet paper. Here, the blanket of one press roll that presses one surface of the wet paper has a width of 0.9 mm of the high-density portion along the width direction, and the area ratio of the high-density portion and the low-density portion is 30: An uneven pattern to be 70 is provided. In the press part, the wet paper is fed between the press rolls, and the concave / convex pattern of one press roll presses the wet paper, so that the area ratio of the high density portion and the low density portion with a width of 0.9 mm is from 30:70. The unevenness is formed on one surface of the wet paper. Next, the wet paper is sent to the dryer part, and the mirror-finished surface of the Yankee dryer is pressed against the surface opposite to the surface on which the wet paper has unevenness to dry the wet paper. The obtained oil-resistant paper was made of oil-resistant paper having an oil resistance of third grade according to the kit method, an air permeability of JIS P 8117 of 25 seconds, and a basis weight of 30 g / m 2 .

〈実施例2〉
実施例2では、先ずパルプにECF漂白したN−BKPとECF漂白したL−BKPとを90%:10%の割合で混合したものを用い、実施例1と同様に紙料を調整した。ワイヤーパートからドライヤーパートまでは、プレスパートにて、幅2mmの高密度部と低密度部との面積比が50:50からなる凹凸を湿紙の一方の面にプレスロールで形成したこと以外は、実施例1と同様にして耐油紙を形成した。得られた耐油紙は、耐油度がキット法で8級であり、透気度が100秒であり、坪量が70g/mである。
<Example 2>
In Example 2, first, a paper stock was prepared in the same manner as in Example 1 using a mixture of N-BKP ECF-bleached and L-BKP ECF-bleached at a ratio of 90%: 10%. From the wire part to the dryer part, except that the press part formed an uneven surface with a 50:50 area ratio between the high density part and the low density part with a width of 2 mm on one side of the wet paper with a press roll. In the same manner as in Example 1, an oil resistant paper was formed. The obtained oil-resistant paper has an oil resistance of grade 8 according to the kit method, an air permeability of 100 seconds, and a basis weight of 70 g / m 2 .

〈実施例3〉
実施例3では、実施例1と同様にして紙料を調整した。ワイヤーパートからドライヤーパートまでは、プレスパートにて、幅3mmの高密度部と低密度部との面積比が60:40からなる凹凸を湿紙の一方の面にプレスロールで形成したこと以外は、実施例1と同様にして耐油紙を形成した。得られた耐油紙は、耐油度がキット法で4級であり、透気度が35秒であり、坪量が40g/mである。
<Example 3>
In Example 3, the paper stock was adjusted in the same manner as in Example 1. From the wire part to the dryer part, except that the press part has an uneven surface area of 60:40 in the area ratio of the high density part and the low density part with a width of 3 mm on one side of the wet paper. In the same manner as in Example 1, an oil resistant paper was formed. The obtained oil-resistant paper has an oil resistance of grade 4 according to the kit method, an air permeability of 35 seconds, and a basis weight of 40 g / m 2 .

〈実施例4〉
実施例4では、パルプにECF漂白したN−BKPとTCF漂白したL−BKPとFAS漂白した古紙パルプ(DIP)とを80%:10%:10%の割合で混合したものを用い、実施例1と同様に紙料を調整した。ワイヤーパートからドライヤーパートまでは、プレスパートにて、幅0.5mmの高密度部と低密度部との面積比が10:90からなる凹凸を湿紙の一方の面にプレスロールで形成したこと以外は、実施例1と同様にして耐油紙を形成した。得られた耐油紙は、耐油度がキット法で6級であり、透気度が60秒であり、坪量が50g/mである。
<Example 4>
In Example 4, pulp mixed with ECF bleached N-BKP, TCF bleached L-BKP, and FAS bleached waste paper pulp (DIP) was used at a ratio of 80%: 10%: 10%. The stock was adjusted as in 1. From the wire part to the dryer part, the press part formed an irregularity consisting of a high density part with a width of 0.5 mm and a low density part of 10:90 on one side of the wet paper with a press roll. Except for the above, an oil-resistant paper was formed in the same manner as in Example 1. The obtained oil-resistant paper has an oil resistance of grade 6 by the kit method, an air permeability of 60 seconds, and a basis weight of 50 g / m 2 .

〈実施例5〉
実施例5では、紙料を実施例1と同様にして調整した。ワイヤーパートからドライヤーパートまでは、プレスパートにて、幅5mmの高密度部と低密度部との面積比が90:10からなる凹凸を湿紙の一方の面にプレスロールで形成したこと以外は、実施例1と同様にして耐油紙を形成した。得られた耐油紙は、耐油度がキット法で5級であり、透気度が50秒であり、坪量が50g/mである。
<Example 5>
In Example 5, the stock was adjusted in the same manner as in Example 1. From the wire part to the dryer part, except that the unevenness consisting of 90:10 area ratio of high-density part and low-density part of 5mm width was formed on one side of the wet paper with a press roll. In the same manner as in Example 1, an oil resistant paper was formed. The obtained oil-resistant paper has an oil resistance of grade 5 according to the kit method, an air permeability of 50 seconds, and a basis weight of 50 g / m 2 .

〈比較例1〉
比較例1では、パルプに塩素(C)漂白したN−BKPを用い、このパルプと耐油剤としてチバスペシャリティケミカルズ社製のローダイン2000を10kg/tと、湿潤紙力増強剤(星光PMC社製:WS4024)を7kg/tとを混合して紙料を調整する。ワイヤーパートからドライヤーパートまでは、プレスパートにて、幅0.5mmの高密度部と低密度部との面積比が30:70からなる凹凸を湿紙の一方の面にプレスロールで形成したこと以外は、実施例1と同様にして耐油紙を形成した。得られた耐油紙は、耐油度がキット法で2級であり、透気度が15秒であり、坪量が25g/mである。
<Comparative example 1>
In Comparative Example 1, N-BKP bleached with chlorine (C) was used for the pulp, and Rhodine 2000 manufactured by Ciba Specialty Chemicals was used as the pulp and oil resistance agent at 10 kg / t. WS4024) is mixed with 7 kg / t to adjust the stock. From the wire part to the dryer part, in the press part, the unevenness consisting of 30:70 area ratio of high-density part and low-density part with a width of 0.5mm was formed on one side of the wet paper with a press roll Except for the above, an oil-resistant paper was formed in the same manner as in Example 1. The obtained oil-resistant paper has an oil resistance of second grade according to the kit method, an air permeability of 15 seconds, and a basis weight of 25 g / m 2 .

〈比較例2〉
比較例2では、パルプにC漂白したN−BKPとECF漂白したL−BKPとを50%:50%の割合で混合したものを用い、実施例1と同様に紙料を調整した。ワイヤーパートからドライヤーパートまでは、プレスパートにて、凹凸が形成されていないプレスロールを用い、湿紙の水分を搾り取ったこと以外は、実施例1と同様にして耐油紙を形成した。そして、得られた耐油紙に対して、幅方向に沿って幅2mmの高密度部と低密度部の面積比が50:50となる凹凸パターンが設けられているエンボスロールを押圧し、耐油紙の一方の面に幅2mmの高密度部と低密度部の面積比が50:50の凹凸を形成した。得られた耐油紙は、耐油度がキット法で5級であり、透気度が120秒であり、坪量が80g/mである。
<Comparative example 2>
In Comparative Example 2, a paper stock was prepared in the same manner as in Example 1 using a mixture of N-BKP C-bleached with pulp and L-BKP ECF-bleached at a ratio of 50%: 50%. From the wire part to the dryer part, an oil-resistant paper was formed in the same manner as in Example 1 except that the press part used a press roll having no irregularities and squeezed the moisture of the wet paper. And the embossing roll provided with the uneven | corrugated pattern in which the area ratio of the high-density part of width 2mm and a low-density part becomes 50:50 is pressed with respect to the obtained oil-resistant paper, and oil-resistant paper On one surface of the film, irregularities having an area ratio of a high density portion having a width of 2 mm and a low density portion of 50:50 were formed. The obtained oil-resistant paper has an oil resistance of grade 5 according to the kit method, an air permeability of 120 seconds, and a basis weight of 80 g / m 2 .

〈比較例3〉
比較例3では、パルプにC漂白したN−BKPとFAS漂白したDIPとを20%:80%の割合で混合したものを用い、比較例1と同様に紙料を調整した。ワイヤーパートからドライヤーパートまでは、比較例2と同様にして耐油紙を形成した。そして、得られた耐油紙に対して、幅方向に沿って幅3mmの高密度部と低密度部との面積比が60:40となる凹凸パターンが設けられているエンボスロールを押圧し、耐油紙の一方の面に幅3mmの高密度部と低密度部の面積比が60:40の凹凸を形成した。得られた耐油紙は、耐油度がキット法で2級であり、透気度が30秒であり、坪量が40g/mである。
<Comparative Example 3>
In Comparative Example 3, a paper stock was prepared in the same manner as in Comparative Example 1 using a mixture of N-BKP C-bleached with pulp and DIP bleached with FAS at a ratio of 20%: 80%. From the wire part to the dryer part, oil-resistant paper was formed in the same manner as in Comparative Example 2. And the embossing roll provided with the uneven | corrugated pattern from which the area ratio of the high density part of width 3mm and a low density part is set to 60:40 along the width direction is pressed with respect to the obtained oil resistant paper, and oil resistance Concavities and convexities having an area ratio of a high density portion and a low density portion of 3 mm in width of 60:40 were formed on one surface of the paper. The obtained oil-resistant paper has oil resistance of second grade according to the kit method, air permeability of 30 seconds, and basis weight of 40 g / m 2 .

〈比較例4〉
比較例4では、パルプにC漂白したN−BKPを用い、実施例1と同様に紙料を調整した。ワイヤーパートからドライヤーパートの間では、プレスパートにて、幅0.3mmの高密度部と低密度部との面積比が5:95からなる凹凸を湿紙の一方の面にプレスロールで形成したこと以外は、実施例1と同様にして耐油紙を形成した。得られた耐油紙は、耐油度がキット法で3級であり、透気度が60秒であり、坪量が50g/mである。
<Comparative example 4>
In Comparative Example 4, a paper stock was prepared in the same manner as in Example 1 using N-BKP that was C-bleached to pulp. Between the wire part and the dryer part, in the press part, an unevenness having an area ratio of a high density part of 0.3 mm in width and a low density part of 5:95 was formed on one surface of the wet paper with a press roll. Except for this, an oil-resistant paper was formed in the same manner as in Example 1. The obtained oil-resistant paper has an oil resistance of third grade according to the kit method, an air permeability of 60 seconds, and a basis weight of 50 g / m 2 .

〈比較例5〉
比較例5では、パルプにC漂白したN−BKPとC漂白したL−BKPとを40%:60%の割合で混合したものを用い、比較例1と同様に紙料を調整した。ワイヤーパートからドライヤーパートの間では、プレスパートにて、幅6mmの高密度部と低密度部との面積比が95:5からなる凹凸を湿紙の一方の面にプレスロールで形成したこと以外は、実施例1と同様にして耐油紙を形成した。得られた耐油紙は、耐油度がキット法で2級であり、透気度が40秒であり、坪量が50g/mである。
<Comparative Example 5>
In Comparative Example 5, a paper stock was prepared in the same manner as in Comparative Example 1, using a pulp obtained by mixing C-bleached N-BKP and C-bleached L-BKP at a ratio of 40%: 60%. Between the wire part and the dryer part, except that the press part formed an unevenness of 95: 5 in the area ratio of the high-density part and the low-density part with a width of 6 mm on one side of the wet paper with a press roll. Formed an oil-resistant paper in the same manner as in Example 1. The obtained oil-resistant paper has oil resistance of second grade by the kit method, air permeability of 40 seconds, and basis weight of 50 g / m 2 .

以上のようにして抄紙した実施例1〜実施例5及び比較例1〜比較例5の耐油紙について、耐油度は、キット法に準じて測定した。坪量は、JIS P 8124に規定される坪量測定方法に準じて測定した。透気度は、JIS P 8117に規定される透気度試験方法のガーレー試験機法に準じて測定した。また、凹部で形成された高密度部の幅は、光学実体顕微鏡を用いて耐油紙の凹凸が形成されている一方の面を写真撮影し、スケール(定規)と対比して各高密度部の幅を測り、平均したものである。また、高密度部と低密度部の面積比は、光学実体顕微鏡を用いて耐油紙の凹凸が形成されている一方の面を写真撮影し、2cm平方における高密度部と低密度部の平均幅より面積比を求めた。   The oil resistance of the oil-resistant papers of Examples 1 to 5 and Comparative Examples 1 to 5 made as described above was measured according to the kit method. The basis weight was measured according to the basis weight measurement method specified in JIS P 8124. The air permeability was measured according to the Gurley tester method of the air permeability test method defined in JIS P 8117. In addition, the width of the high-density portion formed by the concave portions is photographed on one surface on which the unevenness of the oil-resistant paper is formed using an optical stereomicroscope, and is compared with the scale (ruler). The width is measured and averaged. The area ratio between the high-density part and the low-density part is the average width of the high-density part and the low-density part at 2 cm square by taking a photograph of one surface on which the unevenness of the oil-resistant paper is formed using an optical stereomicroscope. More area ratio was calculated | required.

得られた実施例1〜実施例5及び比較例1〜比較例5の耐油紙について、クリスピー感、作業性、油保持性、環境面について評価した。評価結果を以下の表1に示す。   About the obtained oil-resistant paper of Examples 1 to 5 and Comparative Examples 1 to 5, the crispy feeling, workability, oil retention, and environmental aspects were evaluated. The evaluation results are shown in Table 1 below.

Figure 2006348435
Figure 2006348435

クリスピー感は、油揚げを耐油紙で包装し、10分後のクリスピー感について、成人男女10名が油揚げを食し、5段階評価を行った。5段階評価にうち、評価5はサクッとした食感があり、クリスピー感が良好であるとし、評価5から評価1になるにしたがって、サクッとした食感がなくなり、評価1ではクリスピー感が悪いとした。   Crispy feeling was packaged with oil-resistant paper, and ten adult men and women ate crispy feeling after 10 minutes and evaluated it on a five-point scale. Among the five-level evaluation, the evaluation 5 has a crispy texture and the crispy feeling is good, and the crispy texture disappears from the evaluation 5 to the evaluation 1. In the evaluation 1, the crispy feeling is bad. It was.

作業性については、成人男女10名が油揚げを耐油紙で包装し、その包装する際の作業性について5段階評価を行った。5段階評価のうち、評価5は、作業性に優れ、評価4は、作業性が良好であり、評価3は、包装する際に手が滑ったりする場合があり、評価2は、油揚げを包装しづらく、評価1は、包装する際に問題があるとした。   Regarding workability, 10 adult men and women packaged fried chicken with oil-resistant paper, and the workability when packaging was evaluated on a five-point scale. Among the five-level evaluations, evaluation 5 is excellent in workability, evaluation 4 is good in workability, evaluation 3 may cause hand slipping when packaging, and evaluation 2 packages fried chicken. Difficult to evaluate, it was assumed that there was a problem when packaging.

油保持性は、JIS P 8140に規定されるコブサイズに準じ、水に変えて市販のサラダオイルを用いて油分の保持量を測定した。測定時、サラダオイルは吸い取り紙で低密度部に油の付着がなくなるまで軽く抑える様に拭き取った。高密度部の油分の保持量が一番多いものを1位とし、保持量の多いものから順に1位から9位まで順位を付けた。厚みの薄い部分の保持量が多く、油保持性の優れている1位から3位までを◎印で示し、保持量がやや少ないが耐油紙として適用できる4位と6位を○印で示し、保持量が少なく、耐油紙として適用できない7位から8位を△印で示し、保持量がほとんどなく、耐油紙として適用できない9位以下を×印で示した。   The oil retention was measured in accordance with the bump size specified in JIS P 8140 using a commercially available salad oil instead of water. At the time of measurement, the salad oil was wiped off with a blotting paper so as to lightly suppress the oil from adhering to the low density portion. The one with the highest amount of oil in the high-density part was ranked first, and the one with the largest amount was ranked from the first to the ninth. The 1st to 3rd positions, which have a large amount of retention in thin parts and excellent oil retention, are indicated by ◎, and the 4th and 6th positions that are slightly less retained but can be applied as oil-resistant paper are indicated by ○. The 7th to 8th positions, which have a small holding amount and cannot be applied as oil-resistant paper, are indicated by Δ, and the 9th or lower position, which has little holding amount and cannot be applied as an oil-resistant paper, is indicated by X.

環境面は、各耐油紙を小型焼却炉で温度940度から950度で焼却し、排ガス中の塩化水素の発生量を調査した。塩化水素の発生量が1番少ないものを1位とし、塩化水素の発生量が少ないものから順に順位を付けた。塩化水素の発生量が少ない1位から3位を◎印で示し、塩化水素がやや発生した4位から5位を○印で示し、塩化水素の発生量がやや多い6位から7位を△印で示し、塩化水素の発生量が多い8位以下を×印で示した。   In terms of the environment, each oil-resistant paper was incinerated at a temperature of 940 to 950 degrees in a small incinerator, and the amount of hydrogen chloride generated in the exhaust gas was investigated. The one with the least hydrogen chloride generation was ranked first, and the one with the lowest hydrogen chloride generation was ranked in order. The 1st to 3rd positions where hydrogen chloride is generated are marked with ◎, the 4th to 5th positions where hydrogen chloride is generated are marked with ○, and the 6th to 7th positions with slightly generated hydrogen chloride are marked with △ The 8th and lower positions where a large amount of hydrogen chloride is generated are indicated by x.

表1において、実施例1〜実施例5は、耐油度が3級以上であり、透気度が100秒以下であり、油揚げと接する面側に幅0.5mm以上の凹部で形成された高密度部と、凸部で形成された低密度部の凹凸が設けられ、坪量が30g/m以上、70g/m以下である。また、実施例1〜実施例5は、幅0.5mm以上の高密度部と低密度部の面積比が10:90〜90:10の範囲である。また、実施例1〜実施例5は、凹部で形成された幅0.5mm以上の高密度部がプレスパートのプレスロールで形成される。このような条件からなる実施例1〜実施例5は、これらの条件を満たしていない比較例1〜比較例5と比べて、クリスピー感、作業性、油保持性のすべての評価が良好であった。 In Table 1, Examples 1 to 5 have high oil resistance of grade 3 or higher, air permeability of 100 seconds or less, and formed with a recess having a width of 0.5 mm or more on the surface side in contact with fried chicken. The density part and the unevenness | corrugation of the low density part formed with the convex part are provided, and basic weight is 30 g / m < 2 > or more and 70 g / m < 2 > or less. In Examples 1 to 5, the area ratio of the high density part and the low density part having a width of 0.5 mm or more is in the range of 10:90 to 90:10. In Examples 1 to 5, a high-density portion having a width of 0.5 mm or more formed by a recess is formed by a press roll of a press part. In Examples 1 to 5 having such conditions, all evaluations of crispy feeling, workability, and oil retention were good compared to Comparative Examples 1 to 5 that did not satisfy these conditions. It was.

また、実施例1〜実施例5は、パルプの漂白にECF漂白やTCF漂白、FAS漂白を用いており、パルプに塩素漂白を施した比較例1〜比較例5と比べて、環境面の評価が良好であった。   In addition, Examples 1 to 5 use ECF bleaching, TCF bleaching, or FAS bleaching for pulp bleaching, and environmental evaluation as compared with Comparative Examples 1 to 5 in which pulp is subjected to chlorine bleaching. Was good.

比較例1では、坪量が25g/mであり、30g/mよりも小さく、耐油度が2級であることから、包装中に破れたり、油分が外面まで浸透して滑りやすくなり、作業性が低下した。また、比較例1では、耐油度が2級であり、油分が浸透したことにより、油保持性が低下した。 In Comparative Example 1, a basis weight of 25 g / m 2, less than 30 g / m 2, since the oil level is secondary, or torn during packaging, oil is slippery to penetrate to the outer surface, Workability decreased. In Comparative Example 1, the oil resistance was second grade, and the oil retention decreased due to the permeation of the oil.

比較例2では、透気度が100秒よりも大きいため、内部の蒸気が外部に排出されにくく、内部にこもり、油揚げのクリスピー感が低下した。また、比較例2では、坪量が80g/mであり、70g/mより高いため、強度が高くなり過ぎ、包装する際の作業性が悪くなったり、包装された状態で食品2を受け取ったり、食品2を食する際に取り扱いずらくなる。 In Comparative Example 2, since the air permeability was greater than 100 seconds, the internal steam was difficult to be discharged to the outside, and the inside steam was trapped inside, and the crispy feeling of frying was reduced. Further, in Comparative Example 2, the basis weight is 80 g / m 2 and is higher than 70 g / m 2 , so that the strength becomes too high, the workability at the time of packaging deteriorates, or the food 2 is in a packaged state. When receiving or eating food 2, it becomes difficult to handle.

比較例3では、耐油紙を作製した後、エンボスロールで高密度部及び低密度部を形成したため、強度が低下し、包装中に破れやすいといった不具合が生じ、作業性が低下した。また、比較例3では、耐油度が2級であり、3級よりも低いため、油分が外面に染み出てしまい、高密度部で油分が保持されなかったため、油保持性及び作業性が低下した。   In Comparative Example 3, after the oil-resistant paper was produced, the high density part and the low density part were formed with the embossing roll, so that the strength was lowered and a problem such as easy tearing occurred during the packaging, and the workability was lowered. Further, in Comparative Example 3, the oil resistance is 2nd grade and lower than 3rd grade, so that the oil component oozes out to the outer surface and the oil content is not held in the high density portion, so that the oil retention and workability are reduced. did.

比較例4では、高密度部の幅0.3mmであり、高密度部と低密度部の面積比が5:95であることから、高密度部の幅が狭く、面積が少ないことから、油分を保持しきれず、油保持性が低下した。また、比較例4では、保持しきれなかった油分が食品に再付着してしまい、クリスピー性が低下した。   In Comparative Example 4, the width of the high-density part is 0.3 mm, and the area ratio of the high-density part and the low-density part is 5:95, so the width of the high-density part is narrow and the area is small. The oil retention was reduced. Moreover, in the comparative example 4, the oil component which could not be hold | maintained reattached to foodstuffs, and crispy property fell.

比較例5では、耐油度が2級であり、3級よりも低いため、油分が外面に染み出てしまい、高密度部で油分が保持されなかったため、油保持性が低下した。また、比較例5では、油分が外面に染み出たことにより、外面が油分より滑りやすくなり、作業性が低下した。また、比較例5では、高密度部:低密度部の面積比が95:5で、高密度部の面積が広いため、高密度部に保持されている油分が食品に再付着しやすく、クリスピー性が低下した。   In Comparative Example 5, the oil resistance was 2nd grade and lower than 3rd grade. Therefore, the oil content oozed out to the outer surface, and the oil content was not retained in the high density portion, so that the oil retention was lowered. Moreover, in the comparative example 5, when the oil component oozed out to the outer surface, the outer surface became slippery than the oil component, and workability was lowered. In Comparative Example 5, the area ratio of the high-density part: low-density part is 95: 5 and the area of the high-density part is wide, so that the oil retained in the high-density part is easily reattached to the food. Decreased.

また、比較例1〜比較例5では、塩素漂白を施したパルプが含有されているため、焼却した際の排ガス中に含まれる塩化水素の量が多くなり、環境面の評価が低下した。   Further, in Comparative Examples 1 to 5, since the pulp bleached with chlorine was contained, the amount of hydrogen chloride contained in the exhaust gas when incinerated was increased, and environmental evaluation was lowered.

これに対して、実施例1〜実施例5では、油揚げと接する面に幅0.5mm以上の凹部で形成された高密度部と、凸部で形成された低密度部とからなる凹凸が設けられ、この高密度部と低密度部の面積比が10:90〜90:10であることから、高密度部に油揚げから染み出た油分が流れ込み、油保持性が良好となった。   On the other hand, in Example 1-5, the unevenness | corrugation which consists of the high-density part formed in the recessed part of width 0.5mm or more and the low-density part formed in the convex part is provided in the surface which touches the frying. In addition, since the area ratio of the high density portion and the low density portion is 10:90 to 90:10, the oil component oozed out from the deep frying flowed into the high density portion, and the oil retention was improved.

また、実施例1〜実施例5では、油保持性が良好であるため、油揚げに油分が再付着せず、透気度が100秒以下で蒸気の排出も良好であることから、蒸気が内部にこもらないため、油揚げの食感が劣化せず、クリスピー感が良好となった。   In Examples 1 to 5, since the oil retention is good, the oil does not reattach to the deep frying, the air permeability is 100 seconds or less, and the discharge of steam is good. Since it was not squeezed, the texture of fried fried food was not deteriorated and the crispy feeling was good.

また、実施例1〜実施例5では、耐油度が3級以上であり、外面に油分が浸透せず、外面が汚れたり、滑りやすくなることがなく、坪量が30g/m以上、70g/m以下であり、包装する際に破れたりすることなく、取り扱いやすいため、作業性が良好となった、また、実施例1〜実施例4では、プレスパートにて、高密度部を形成することから、抄紙後の耐油紙に圧力が加わらないため強度の低下が防止され、作業性が良好となった。 In Examples 1 to 5, the oil resistance is grade 3 or higher, the oil does not penetrate into the outer surface, the outer surface is not soiled or slippery, and the basis weight is 30 g / m 2 or more and 70 g. / M 2 or less, and since it is easy to handle without tearing when packaging, workability is good. In Examples 1 to 4, high-density parts are formed in the press part. As a result, no pressure was applied to the oil-resistant paper after paper making, so that a decrease in strength was prevented and workability was improved.

また、実施例1〜実施例5では、パルプの漂白にECF漂白、TCF漂白及びFAS漂白を用いているため、焼却した際の排ガスに含有される塩化水素の量が非常に少なく、環境面の評価が良好となった。   In Examples 1 to 5, since ECF bleaching, TCF bleaching and FAS bleaching are used for bleaching the pulp, the amount of hydrogen chloride contained in the exhaust gas when incinerated is very small, Evaluation was good.

以上のように、耐油度がキット法で3級以上、JIS P 8117に規定されている透気度が100秒以下で、油揚げ等の油分を含む収容物と接する面側に幅1mm以上の高密度部と、低密度部からなる凹凸を設け、米坪が30g/m以上、70g/m以下にすることによって、収容物に油分が再付着を防止することができる耐油紙が得られる。更に、高密度部と低密度部の面積比を10:90〜90:10にしたり、高密度部と低密度部をプレスパートにて形成することによって、より良好な耐油紙を得ることができる。 As described above, the oil resistance is grade 3 or higher according to the kit method, the air permeability defined in JIS P 8117 is 100 seconds or less, and the width of the surface that comes into contact with the container containing oil such as fried oil is 1 mm wide or higher. By providing irregularities consisting of a density part and a low density part, and having a basis weight of 30 g / m 2 or more and 70 g / m 2 or less, an oil-resistant paper capable of preventing oil from reattaching to the contents is obtained. . Furthermore, a better oil-resistant paper can be obtained by setting the area ratio of the high-density part and the low-density part to 10:90 to 90:10 or forming the high-density part and the low-density part with a press part. .

本発明を適用した耐油紙で食品を収容する袋を形成した場合の斜視図である。It is a perspective view at the time of forming the bag which accommodates a foodstuff with the oil-resistant paper to which this invention is applied. 同耐油紙の断面図である。It is sectional drawing of the oil-resistant paper.

符号の説明Explanation of symbols

1 耐油紙、1a 高密度部、1b 低密度部、2 食品、3 油分   1 oil resistant paper, 1a high density part, 1b low density part, 2 food, 3 oil content

Claims (3)

耐油度がキット法で3級以上であり、
JIS P 8117に規定されている透気度が100秒以下であり、
少なくとも収容物と接する面側に、幅0.5mm以上の凹部で形成された高密度部と、凸部で形成された低密度部とからなる凹凸が設けられ、
JIS P 8124に規定されている坪量が30g/m以上、70g/m以下であることを特徴とする耐油紙。
Oil resistance is grade 3 or higher by the kit method,
The air permeability specified in JIS P 8117 is 100 seconds or less,
Convex / concaves formed of a high density portion formed by a concave portion having a width of 0.5 mm or more and a low density portion formed by a convex portion are provided at least on the side in contact with the container,
An oil-resistant paper having a basis weight specified in JIS P 8124 of 30 g / m 2 or more and 70 g / m 2 or less.
上記高密度部と上記低密度部との面積比は、10:90〜90:10であることを特徴とする請求項1記載の耐油紙。   2. The oil-resistant paper according to claim 1, wherein an area ratio between the high-density portion and the low-density portion is 10:90 to 90:10. 上記高密度部は、抄紙機のプレスパートにて、プレス用毛布に設けられた凸部によって形成されることを特徴とする請求項1記載の耐油紙。   The oil-resistant paper according to claim 1, wherein the high-density portion is formed by a convex portion provided on a blanket for press in a press part of a paper machine.
JP2005178293A 2005-06-17 2005-06-17 Oil resistant paper Pending JP2006348435A (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
JP2011506779A (en) * 2007-11-20 2011-03-03 オルバニー インターナショナル コーポレイション Convex / concave member and method for producing tissue paper web

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JPH02127600A (en) * 1988-11-02 1990-05-16 Nisshinbo Ind Inc Patterned paper
JPH05117997A (en) * 1991-10-18 1993-05-14 Tokushu Seishi Kk Production of resin-impregnated paper having many multicolor patterns of arbitrary design
JPH0987999A (en) * 1995-09-20 1997-03-31 Saikiyoushiya:Kk Paper mat for cooking and its production
JPH09158096A (en) * 1995-12-15 1997-06-17 Daiko Seishi Kk Partly coated release paper
JP2001254293A (en) * 2000-03-07 2001-09-21 Fukusuke Kogyo Co Ltd Heat-sealable paper resistant to oil and water, method for producing the paper and packaging bag for heating
JP2004237994A (en) * 2003-02-04 2004-08-26 Toppan Printing Co Ltd Paper-made packaging bag for use in microwave oven
JP2004332132A (en) * 2003-04-30 2004-11-25 Hokuetsu Paper Mills Ltd Oil-resistant paper and method for producing the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02127600A (en) * 1988-11-02 1990-05-16 Nisshinbo Ind Inc Patterned paper
JPH05117997A (en) * 1991-10-18 1993-05-14 Tokushu Seishi Kk Production of resin-impregnated paper having many multicolor patterns of arbitrary design
JPH0987999A (en) * 1995-09-20 1997-03-31 Saikiyoushiya:Kk Paper mat for cooking and its production
JPH09158096A (en) * 1995-12-15 1997-06-17 Daiko Seishi Kk Partly coated release paper
JP2001254293A (en) * 2000-03-07 2001-09-21 Fukusuke Kogyo Co Ltd Heat-sealable paper resistant to oil and water, method for producing the paper and packaging bag for heating
JP2004237994A (en) * 2003-02-04 2004-08-26 Toppan Printing Co Ltd Paper-made packaging bag for use in microwave oven
JP2004332132A (en) * 2003-04-30 2004-11-25 Hokuetsu Paper Mills Ltd Oil-resistant paper and method for producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011506779A (en) * 2007-11-20 2011-03-03 オルバニー インターナショナル コーポレイション Convex / concave member and method for producing tissue paper web

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