Oilproof paper, food packaging sheet, packing material, packaging bag, and manufacturing method of oilproof paper

Abstract

To provide oilproof paper having oilproof property and air permeability high enough for actual use and having excellent papermaking property enough for suppression of tack formation in its production process, a food packaging sheet, a packing material, a packaging bag, and a manufacturing method of the oilproof paper.SOLUTION: Oilproof paper contains, in a paper substrate, (A) fatty acid or a derivative thereof and (B) at least one kind selected from the group consisting of (b1) polyvinyl alcohol and a derivative thereof, (b2) polyvinyl butyral and a derivative thereof, (b3) cationic or nonionic starch and a derivative thereof, and (b4) cationic or nonionic dextrin and a derivative thereof, wherein contents of the component (A) and the component (B) contained in the paper substrate are 0.5-20 g / m2 in dry mass conversion, and when the component (B) includes at least one kind selected from the group consisting of the component (b1) and the component (b2), a mass ratio (A / B) of a total amount of the component (A) with respect to a total amount of the component (A) is 1.5 to 12.

Description

[Technical field]

[0001] The present invention relates to greaseproof paper, food packaging paper, packaging materials, packaging bags, and a method for manufacturing greaseproof paper. [Background technology]

[0002] Greaseproof paper is widely used as a material for packaging bags and containers for cooked foods such as fast food, fried foods, and baked foods that contain a lot of oil and moisture, as well as foods that contain a lot of fats and oils, such as chocolate.

[0003] Generally, fluororesin-based oil-resistant agents are widely used as oil-resistant agents that impart oil resistance to paper. For example, greaseproof paper in which an oil-resistant layer is formed by coating the surface of a paper base material with a fluororesin-based oil-resistant agent, and greaseproof paper in which a fluororesin-based oil-resistant agent is internally added to a paper base material are known. However, in response to the increasing demand for reducing environmental impact in recent years, attempts are being made to replace PFAS (a general term for organic fluorine compounds) with non-fluorine-based materials.

[0004] For example, Patent Document 1 discloses a paper substrate having an oil-resistant layer formed on at least one surface thereof at a dry weight ratio of 0.5 to 5.0 g / m2, the oil-resistant layer being composed of an ethylene-vinyl alcohol-vinyl ester copolymer (A) and a fatty acid derivative (B) derived from a fatty acid having 8 or more carbon atoms, the component (B) being blended in an amount of 1 to 100 parts by mass per 100 parts by mass of the component (A). 2 The present invention discloses a greaseproof paper having a [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2014 / 038516 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when using the oil-proofing agent disclosed in Patent Document 1 and the like, there is still room for improvement in terms of achieving a good balance among required properties such as oil resistance, air permeability, and papermaking properties that suppress tack.

[0007] For example, when a film is applied to a substrate to impart oil resistance, the air permeability may be insufficient, which makes it difficult for water vapor generated from packaged foods to escape from the greaseproof paper to the outside. For this reason, it is difficult to achieve both oil resistance and air permeability at a high level. In particular, when conventional greaseproof paper is actually used as a material for the above-mentioned packaging bags and packaging containers, there is a significant problem that sufficient oil resistance and air permeability to withstand practical use cannot be obtained. Furthermore, in the manufacturing process, there is also a problem that the substrate is impregnated with a processing liquid and then dried, and then peeling does not go well, resulting in tackiness.

[0008] As described above, an oil-resistant paper that has high oil resistance and air permeability sufficient for practical use and also has excellent papermaking properties sufficient to suppress tack during the manufacturing process has not yet been developed, and there is still room for improvement in this regard.

[0009] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide grease-resistant paper, food packaging paper, packaging material, packaging bags, and a method for manufacturing grease-resistant paper that has high oil resistance and air permeability sufficient for practical use and excellent papermaking properties sufficient to suppress tack during the manufacturing process. [Means for solving the problem]

[0010] As a result of intensive research by the present inventors to achieve the above-mentioned object, it has been discovered that a paper base material contains (A) a fatty acid or a derivative thereof, and (B) at least one selected from the group consisting of (b1) polyvinyl alcohol and its derivatives, (b2) polyvinyl butyral and its derivatives, (b3) cationic or nonionic starch and its derivatives, and (b4) cationic or nonionic dextrin and its derivatives, and the contents of the (A) and (B) components contained in the paper base material are 0.5 to 20 g / m in terms of dry mass. 2 and when the (B) component contains at least one selected from the group consisting of the (b1) component and the (b2) component, the mass ratio (A / B) of the total amount of the (A) component to the total amount of the (B) component is 1.5 to 12, and thus the present invention has been completed.

[0011] That is, the present invention is as follows.

[0012] (1) The paper base material contains (A) a fatty acid or a derivative thereof, and (B) at least one selected from the group consisting of (b1) polyvinyl alcohol and its derivatives, (b2) polyvinyl butyral and its derivatives, (b3) cationic or nonionic starch and its derivatives, and (b4) cationic or nonionic dextrin and its derivatives, and the content of the (A) component and the (B) component contained in the paper base material is 0.5 to 20 g / m in terms of dry mass. 2 and when the component (B) contains at least one selected from the group consisting of the component (b1) and the component (b2), the mass ratio (A / B) of the total amount of the component (A) to the total amount of the component (B) is 1.5 to 12. (2) The grease-resistant paper according to (1) contains, as the component (A), at least one selected from the group consisting of polyamine-aliphatic-epichlorohydrin polycondensates and aliphatic amide derivatives. (3) The greaseproof paper according to (1) or (2) contains, as the component (b1), at least one selected from the group consisting of polyvinyl alcohol, alkylene-modified polyvinyl alcohol, and saponified polyvinyl alcohol. (4) The greaseproof paper according to (1) or (2) contains, as the component (b3), at least one selected from the group consisting of starch and acetylated oxidized starch. (5) The grease-resistant paper according to (1) or (2) does not contain a fluorine-based resin. (6) The grease-resistant paper according to (1) or (2), wherein both sides of the substrate are impregnated with the component (A) and the component (B). (7) The grease-resistant paper according to (1) or (2) has an air permeability of 500 seconds or less as measured in accordance with ISO 5636-6:2015. (8) A food packaging paper used as a material for packaging food, the food packaging paper including the greaseproof paper described in (1) or (2). (9) A packaging material comprising the greaseproof paper according to (1) or (2). (10) A packaging bag comprising the grease-resistant paper according to (1) or (2), the grease-resistant paper being arranged on the side that comes into contact with the packaged item. (11) The present invention includes a process for impregnating a paper base material with a processing liquid containing (A) a fatty acid or a derivative thereof, and (B) at least one selected from the group consisting of (b1) polyvinyl alcohol and its derivatives, (b2) polyvinyl butyral and its derivatives, (b3) cationic or nonionic starch and its derivatives, and (b4) cationic or nonionic dextrin and its derivatives, and drying the paper base material, wherein the content of the (A) component and the (B) component contained in the paper base material is 0.5 to 20 g / m in terms of dry mass. 2and when the component (B) contains at least one selected from the group consisting of the component (b1) and the component (b2), the mass ratio (A / B) of the total amount of the component (A) to the total amount of the component (B) is 1.5 to 12. (12) In the method for producing grease-resistant paper according to (11), the impregnation with the processing liquid is performed by impregnating both sides of the base material with the processing liquid. Effect of the Invention

[0013] According to the present invention, it is possible to provide grease-resistant paper, food packaging paper, packaging material, packaging bags, and a method for manufacturing grease-resistant paper, which have high oil resistance and air permeability sufficient for practical use, and excellent papermaking properties sufficient to suppress tack during the manufacturing process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment for carrying out the present invention (hereinafter, simply referred to as "the present embodiment") will be described in detail. The present embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out by appropriately modifying it within the scope of its gist.

[0015] The greaseproof paper according to this embodiment comprises a paper base material containing (A) a fatty acid or a derivative thereof, and (B) at least one selected from the group consisting of (b1) polyvinyl alcohol and its derivatives, (b2) polyvinyl butyral and its derivatives, (b3) cationic or nonionic starch and its derivatives, and (b4) cationic or nonionic dextrin and its derivatives, and the content of the (A) component and the (B) component contained in the paper base material is 0.5 to 20 g / m in terms of dry mass. 2 and when the component (B) contains at least one selected from the group consisting of the component (b1) and the component (b2), the mass ratio (A / B) of the total amount of the component (A) to the total amount of the component (B) is 1.5 to 12.

[0016] The grease-resistant paper according to the present embodiment is made by containing the components (A) and (B) in a paper base material, but can also be obtained by, for example, impregnating the paper base material with a processing solution containing the components (A) and (B). In that case, the grease-resistant paper can be obtained by impregnating the paper base material with the components (A) and (B). When impregnating, at least one side of the paper base material may be impregnated, or both sides may be impregnated.

[0017] According to this embodiment, it is possible to produce an greaseproof paper that has high oil resistance and air permeability that can withstand practical use, and also has excellent papermaking properties that can suppress tack (stickiness of the greaseproof paper surface) during the manufacturing process.

[0018] In particular, in a preferred embodiment, even if the greaseproof paper is substantially free of fluorine-based resin (non-fluorine-based greaseproof paper), it has high oil resistance and air permeability and can exhibit excellent papermaking properties. Therefore, it can be suitably used as a non-fluorine-based greaseproof paper. Note that "substantially" does not exclude components that are unavoidably contained or mixed.

[0019] For example, in conventional greaseproof paper, in order to eliminate the use of fluorine resin, attempts have been made to impart oil resistance to the paper base material by using an ethylene-vinyl alcohol-vinyl ester copolymer and a fatty acid derivative derived from a fatty acid having 8 or more carbon atoms as an oil-resistant agent. However, even if it is possible to eliminate fluorine resin to a certain extent, there is still room for improvement in terms of achieving both oil resistance and air permeability at a high level. Furthermore, in the manufacturing process, there is also the problem that tack occurs (the surface of the greaseproof paper becomes sticky) after the base material is impregnated with an oil-resistant agent and dried, for example, by hot press drying.

[0020] In addition, when used as wrapping paper or packaging containers for cooked foods such as fast food, fried foods, and baked foods that contain a lot of oil and moisture, or foods that contain a lot of fats and oils such as chocolate, or as paper coverings such as food trays, there is a problem that the oil resistance of the greaseproof paper cannot be maintained at a high enough level to withstand practical use in practical environments.

[0021] However, the reality is that no greaseproof paper has yet been developed that has sufficient oil resistance and air permeability for practical use and also has excellent papermaking properties that can suppress tack during the manufacturing process.

[0022] The present inventors have conducted extensive research to solve this problem, and have found that merely impregnating a paper base material with (A) a fatty acid or a derivative thereof improves air permeability but does not ensure sufficient oil resistance. However, they have also found that the content of (A) component and (B) component is sufficient for a given coating amount (g / m2) calculated as a dry mass. 2 ), and the (B) component contains at least one selected from the group consisting of the (b1) component and the (b2) component, it has been found that the oil resistance is improved by using the (A) component and the (B) component in combination so that the mass ratio (A / B) of the total amount of the (A) component to the total amount of the (B) component is a certain ratio. Although the reason for this is unclear, it is thought that the oil resistance can be improved by using the (A) component and the (B) component in combination under such conditions, as a result of suppressing tack during drying and improving papermaking properties (however, the actions and effects of this embodiment are not limited to these).

[0023] The greaseproof paper according to the present embodiment can at least achieve high oil resistance and air permeability that can withstand practical use, and therefore can be suitably used as a packaging material containing greaseproof paper. In particular, it can be suitably used as food packaging paper used as a material for packaging food. Furthermore, it can also be suitably used as a packaging bag in which the greaseproof paper is placed on the side that comes into contact with the packaged item.

[0024] Furthermore, the grease-resistant paper according to this embodiment can improve the productivity in the drying step in the manufacturing process. The grease-resistant paper according to this embodiment has excellent papermaking properties that can suppress tackiness, and therefore has advantages in the manufacturing process. In particular, when the (B) component contains at least one selected from the group consisting of the (b1) component and the (b2) component, the mass ratio (A / B) of the total amount of the (A) component to the total amount of the (B) component is 1.5 to 12, so that tackiness during drying can be more effectively suppressed and dryer contamination during papermaking can be prevented (however, the actions and effects according to this embodiment are not limited to these).

[0025] Each component will be described below.

[0026] (Paper base material)

[0027] The paper substrate is not particularly limited and can be appropriately selected depending on the application, and examples thereof include bleached or unbleached kraft paper (acidic or neutral paper), fine paper, medium-quality paper, lightly coated paper, coated paper, liner, unsized paper, semi-glassine paper, glassine paper, one-sided gloss paper, parchment paper, white paperboard, etc. Among these, the paper substrate is preferably unsized paper. In this embodiment, unsized paper is paper that does not contain a sizing material and a size fixing material. When the paper substrate is unsized paper, the (A) component and the (B) component are easily impregnated into the paper substrate.

[0028] Examples of pulp constituting the paper base material include wood pulp, non-wood pulp, waste paper pulp, synthetic fiber pulp, etc. Examples of wood pulp include chemical pulp and mechanical pulp of coniferous and broadleaf trees. Examples of non-wood pulp include kenaf pulp, bagasse pulp, rag pulp, linen pulp, hemp pulp, paper mulberry pulp, mitsumata pulp, gampi pulp, straw pulp, bamboo pulp, etc. Examples of waste paper pulp include magazine waste paper, flyer waste paper, colored waste paper, newspaper waste paper, Kent waste paper, white waste paper, coated waste paper, copy waste paper, and broke waste paper. Examples of synthetic fiber pulp include rayon resin, vinylon resin, polyolefin resin, polyester resin, acrylic resin, polyamide resin, polyphenylene resin, polyurethane resin, etc.

[0029] Among these, it is preferable to contain chemical pulp such as hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), hardwood bleached sulfite pulp (LBSP), and softwood bleached sulfite pulp (NBSP).

[0030] Other additives such as sizing agents (alkyl ketene dimers, alkenyl succinic anhydrides, higher fatty acids, petroleum resins, rosins, etc.), paper strength agents (starch, polyacrylamide, polyamidoamine-epichlorohydrin, etc.), retention aids, drainage aids, aluminum sulfate, pH adjusters, defoamers, pitch control agents, slime control agents, etc., may be appropriately selected and used as needed for the paper substrate, so long as they do not impair the effects of this embodiment. Note that in this embodiment, it is preferable not to add an internal sizing agent to the paper substrate.

[0031] The basis weight of the paper base material is 20 to 150 g / m 2 The lower limit of the basis weight is preferably 25 g / m 2 More preferably, it is 30 g / m or more. 2 More preferably, it is 35 g / m or more. 2 It is even more preferable that the basis weight is 80 g / m or more. 2More preferably, it is 70 g / m or less. 2 More preferably, it is 60 g / m or less. 2 It is even more preferable that the basis weight is not more than 100%. This basis weight is a value measured based on the basis weight testing method of JIS P 8124: 2011. If the lower limit of the basis weight is within this range, the strength of the greaseproof paper is further improved, and if the upper limit of the basis weight is within this range, the cost is not high.

[0032] The thickness of the paper base material is preferably 20 to 150 μm. The lower limit of this thickness is more preferably 25 μm or more, even more preferably 30 μm or more, and even more preferably 35 μm or more. The upper limit of this thickness is more preferably 80 μm or less, even more preferably 70 μm or less, and even more preferably 60 μm or less.

[0033] The paper base material can be produced by a known method. For example, softwood pulp and hardwood pulp are dispersed in water at a predetermined mass ratio, and the pulp slurry is beaten to a predetermined degree by a beater to obtain a pulp slurry. Then, additives and the like are added to the obtained pulp slurry as desired. The prepared slurry is made into paper using a known papermaking machine such as a Fourdrinier papermaking machine, a cylinder papermaking machine, or a twin-wire papermaking machine to obtain a paper base material. The papermaking method is not particularly limited, and either acidic papermaking or neutral papermaking can be selected.

[0034] The degree of beating of the paper base material before size pressing is preferably 20 to 70°SR as measured by the Shopper-Rigler method. The lower limit of the degree of beating is more preferably 35°SR or more. The upper limit of the degree of beating is more preferably 50°SR or less. In this embodiment, by setting the lower limit of the degree of beating within the above range, it is expected that stable paper strength will be easily obtained and that paper breakage after bag making will be more effectively prevented. Furthermore, by setting the upper limit of the degree of beating within the above range, it is expected that pulp fibrillation can be more effectively suppressed and the penetration of the components forming the oil-resistant layer into the inside of the paper can be more effectively suppressed.

[0035] (Component (A))

[0036] The greaseproof paper according to the present embodiment contains (A) a fatty acid or a derivative thereof. The (A) component may be any fatty acid component, and may be modified or a fatty acid salt. For example, fatty acid amides derived from fatty acids and amines, and fatty acid esters produced from fatty acids and alcohols, etc., may be suitably used. The fatty acid may be any of saturated fatty acids, unsaturated fatty acids, distilled fatty acids, and hardened fatty acids. Furthermore, it may be a vegetable fatty acid or an animal fatty acid.

[0037] Examples of fatty acids and their derivatives that can be used in this embodiment include fatty acids, fatty acid salts, or fatty acids modified to provide functionality, to which a polyamine-based cationic fixing agent has been added, and those epoxidized with epichlorohydrin-based agents. Examples of fatty acid sizing agents include those in which a modified fatty acid has been added with a polyamine-based cationic fixing agent, and further epoxidized with an epichlorohydrin-based modifying agent. Examples of polyamine-aliphatic-epichlorohydrin polycondensates include those in which a fatty acid is reacted with a polyamine to produce a polyamide condensate, and further epoxidized with an epichlorohydrin compound.

[0038] The number of carbon atoms of the fatty acid is not particularly limited, but a fatty acid having a linear alkyl group with 2 to 36 carbon atoms (preferably 12 to 22, more preferably 16 to 22), or a fatty acid having a linear alkenyl group with 2 to 36 carbon atoms (preferably 12 to 22, more preferably 16 to 22) is preferred.

[0039] Examples of polyamines include polyalkylene polyamines such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, dipropylenetriamine, and tripropylenetetramine; aminoethylethanolamine; and the like.

[0040] As the product obtained by the condensation reaction of fatty acid and polyamine, an amide of a trivalent or higher amine and a higher fatty acid is preferable, for example, a condensation product of a polyethylene polyamine and a higher fatty acid, a reaction product of stearic acid and melamine, etc. As the condensation product of a fatty acid and a polyamine, for example, a quaternary salt made with epichlorohydrin can be used.

[0041] In addition, as a sizing agent using a fatty acid, for example, fatty acid amide waxes such as fatty acid amides such as stearylamide, and N-substituted fatty acid amides such as N,N'-ethylenebisstearylamide can be used. In addition, fatty acid chromium complex salts can also be used.

[0042] Among these, it is preferable that the component (A) contains at least one selected from the group consisting of polyamine-aliphatic-epichlorohydrin polycondensates and aliphatic amide derivatives. In addition, the polyamine-aliphatic-epichlorohydrin polycondensates include polyalkylene polyamine-aliphatic-epichlorohydrin polycondensates. Specific examples of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensates include polyethylene polyamine-aliphatic-epichlorohydrin polycondensates. For example, it is preferable to use "Sizepain DL-FA20" manufactured by Arakawa Chemical Industry Co., Ltd. as the polyalkylene polyamine-aliphatic-epichlorohydrin polycondensates. For example, it is preferable to use "Eleganol NZ-800" manufactured by Meisei Chemical Industry Co., Ltd. as the aliphatic amide derivative. It is preferable to use "Pertol N-815" manufactured by Toho Chemical Industry Co., Ltd. as the polyethylene polyamine-aliphatic-epichlorohydrin polycondensates.

[0043] These may be used alone or in combination of two or more.

[0044] ((B) component)

[0045] The grease-resistant paper of this embodiment contains at least one selected from the group consisting of (b1) polyvinyl alcohol and its derivatives, (b2) polyvinyl butyral and its derivatives, (b3) cationic or nonionic starch and its derivatives, and (b4) cationic or nonionic dextrin and its derivatives.

[0046] The component (b1) is polyvinyl alcohol or a derivative thereof. The component (b1) preferably contains at least one selected from the group consisting of polyvinyl alcohol, alkylene-modified polyvinyl alcohol, and saponified polyvinyl alcohol.

[0047] Examples of polyvinyl alcohol include unmodified polyvinyl alcohol and modified polyvinyl alcohol, which are fully saponified polyvinyl alcohol and partially saponified polyvinyl alcohol, respectively. Examples of modified polyvinyl alcohol include α-olefin modified polyvinyl alcohol, cation modified polyvinyl alcohol, anion modified polyvinyl alcohol, silanol modified polyvinyl alcohol, acetoacetyl modified polyvinyl alcohol, and mercapto modified polyvinyl alcohol.

[0048] Examples of alkylene-modified polyvinyl alcohol include ethylene-modified polyvinyl alcohol. Commercially available alkylene-modified polyvinyl alcohols can also be used. Examples include "Exceval (registered trademark) AQ-4104" (saponification degree 98 to 99 mol% or more) and "Exceval (registered trademark) HR-3010" (saponification degree 98 to 99 mol% or more) manufactured by Kuraray Co., Ltd.

[0049] As the fully saponified polyvinyl alcohol, for example, commercially available products can be used, such as "Kuraray Poval PVA-117" (saponification degree 98 to 99 mol% or more) and "Kuraray Poval PVA-103" (saponification degree 98 to 99 mol% or more) manufactured by Kuraray Co., Ltd., and "Denka Poval K-17C" manufactured by Denka Co., Ltd.

[0050] The saponification degree of polyvinyl alcohol is preferably 80 to 100 mol%. From the viewpoint of imparting appropriate air permeability so as not to trap food-derived water vapor inside the greaseproof paper bag, the lower limit of the saponification degree is more preferably 90 mol% or more, even more preferably 95 mol% or more, and even more preferably 98 mol% or more. The saponification degree of polyvinyl alcohol is the ratio of hydroxyl groups to the total number of acetate groups and hydroxyl groups in the polyvinyl alcohol.

[0051] These may be used alone or in combination of two or more.

[0052] The component (b2) is polyvinyl butyral and its derivatives. Examples of polyvinyl butyral include unmodified polyvinyl butyral and modified polyvinyl butyral, each of which includes fully saponified polyvinyl butyral and partially saponified polyvinyl butyral.

[0053] The saponification degree of polyvinyl butyral is preferably 80 to 100 mol%. From the viewpoint of imparting appropriate air permeability so as not to trap food-derived water vapor inside the grease-resistant paper bag, the lower limit of the saponification degree is more preferably 90 mol% or more, even more preferably 95 mol% or more, and even more preferably 98 mol% or more. The saponification degree of polyvinyl butyral is the ratio of hydroxyl groups to the total number of acetate groups and hydroxyl groups in polyvinyl butyral.

[0054] These may be used alone or in combination of two or more.

[0055] The component (b3) is cationic or nonionic starch and its derivatives. By using cationic or nonionic starch in combination with the component (A), it is possible to impart sufficient levels of oil resistance and air permeability to the greaseproof paper. There is no particular limitation on the type of starch, as long as it is cationic or nonionic, but it is preferable to include at least one type selected from the group consisting of starch and acetylated oxidized starch.

[0056] Examples of starches that can be used include cereal starches such as rice starch, wheat starch, corn starch, and starch derived from waxy corn; and tuber starches such as sweet potato starch, potato starch, and tapioca starch.

[0057] These may be used alone or in combination of two or more.

[0058] The component (b4) is cationic or nonionic dextrin and its derivatives. By using cationic or nonionic dextrin in combination with the component (A), it is possible to impart sufficient levels of oil resistance and air permeability to the greaseproof paper. The type of dextrin is not particularly limited as long as it is cationic or nonionic. Among these, nonionic cornstarch-derived dextrin is preferred as the component (b4).

[0059] These may be used alone or in combination of two or more.

[0060] (Content of component (A) and component (B))

[0061] The content (dry adhesion amount) of the component (A) and the component (B) contained in the paper base material in this embodiment is 0.3 to 20 g / m in terms of dry mass. 2 The lower limit of the content of the component (A) and the component (B) is preferably 0.5 g / m 2 More preferably, it is 0.7 g / m or more. 2The upper limit of the content of the (A) component and the (B) component is preferably 10 g / m or more. 2 More preferably, it is 8 g / m or less. 2 More preferably, it is 7 g / m or less. 2 It is even more preferable that the content of component (A) and component (B) is within such a range. When the content of component (A) and component (B) is within such a range, the oil-resistant agent can sufficiently cover the paper fibers, and as a result, an grease-resistant paper having sufficient oil resistance can be produced. Moreover, the produced grease-resistant paper can exhibit sufficient air permeability to withstand practical use. In addition, the papermaking property is excellent enough to suppress tack during the production process.

[0062] When the (B) component includes at least one selected from the group consisting of the (b1) component and the (b2) component, the mass ratio (A / B) of the total amount of the (A) component to the total amount of the (B) component is 1.5 to 12. The lower limit of the mass ratio (A / B) is more preferably 2 or more. The upper limit of the mass ratio (A / B) is more preferably 8 or less. When the (B) component includes at least one selected from the group consisting of the (b1) component and the (b2) component, if the mass ratio (A / B) of the (A) component and the (B) component is within such a range, tack can be more effectively suppressed in the production process, and as a result, even better papermaking properties can be exhibited.

[0063] When the (B) component includes at least one selected from the group consisting of the (b3) component, the mass ratio (A / B) of the total amount of the (A) component to the total amount of the (B) component is not particularly limited, but is preferably 0.07 to 12. The lower limit of the mass ratio (A / B) is more preferably 0.1 or more, and even more preferably 1.5 or more. The upper limit of the mass ratio (A / B) is more preferably 5 or less, and even more preferably 4 or less. When the (B) component includes at least one selected from the group consisting of the (b3) component, if the mass ratio (A / B) of the (A) component and the (B) component is within such a range, tack can be more effectively suppressed in the production process, and as a result, even better papermaking properties can be exhibited.

[0064] When the (B) component includes at least one selected from the group consisting of the (b4) component, the mass ratio (A / B) of the total amount of the (A) component to the total amount of the (B) component is not particularly limited, but is preferably 0.35 to 10. The lower limit of the mass ratio (A / B) is more preferably 0.36 or more, and even more preferably 0.5 or more. The upper limit of the mass ratio (A / B) is more preferably 4 or less, and even more preferably 2 or less. When the (B) component includes at least one selected from the group consisting of the (b4) component, if the mass ratio (A / B) of the (A) component and the (B) component is within such a range, tack can be effectively suppressed in the production process, and as a result, even better papermaking properties can be exhibited.

[0065] The greaseproof paper preferably has an air permeability of 500 seconds or less as determined in accordance with ISO 5636-6:2015. The lower limit of the air permeability is more preferably 0 seconds or more. The upper limit of the air permeability is more preferably 100 seconds or less, even more preferably 70 seconds or less, even more preferably 50 seconds or less, and even more preferably 45 seconds or less. By having the air permeability in such a range, the air permeability of the greaseproof paper is high enough to withstand a practical level, and deterioration of the flavor and storage stability of food can be efficiently prevented.

[0066] In addition, the grease-resistant paper having the configuration of this embodiment can exhibit high oil resistance (particularly practical oil resistance) that can withstand practical use as an grease-resistant paper used under standard environments. The practical oil resistance here refers to, for example, the resistance to the formation of oil stains that appear when edible oil actually used is dropped onto the surface of the grease-resistant paper and penetrates from the surface to the inside. The specific method for evaluating practical oil resistance is as described in the examples below.

[0067] The greaseproof paper may further contain other additives such as dispersants, defoamers, colorants, etc., as necessary, within the range that does not impair the effects of the present embodiment. It is also preferable that the paper does not contain a fluorine-based resin.

[0068] Furthermore, other functional layers (e.g., a printing layer, a print-receiving layer, an adhesive layer for bag-making processing) may be provided on the surface of the greaseproof paper. For example, a functional layer such as a printing layer or a cover layer may be further provided on the surface of the greaseproof paper. For example, when used as a food packaging bag, a printing layer may not be provided on the inner surface that comes into contact with the food, but a printing layer may be provided on the outer surface.

[0069] (Manufacturing method)

[0070] The method for producing greaseproof paper according to this embodiment includes the steps of impregnating a paper base material with a processing solution containing (A) a fatty acid or a derivative thereof, and (B) at least one selected from the group consisting of (b1) polyvinyl alcohol and its derivatives, (b2) polyvinyl butyral and its derivatives, (b3) cationic or nonionic starch and its derivatives, and (b4) cationic or nonionic dextrin and its derivatives, and drying the paper base material. The content of the (A) component and the (B) component contained in the paper base material is 0.5 to 20 g / m2 in terms of dry mass. 2 and when the component (B) contains at least one selected from the group consisting of the component (b1) and the component (b2), the mass ratio (A / B) of the total amount of the component (A) to the total amount of the component (B) is 1.5 to 12.

[0071] The grease-resistant paper according to the present embodiment is made of a paper base material containing components (A) and (B), but can also be obtained by, for example, impregnating the paper base material with a processing solution containing components (A) and (B). In that case, the grease-resistant paper can be obtained by impregnating the paper base material with components (A) and (B). When impregnating, at least one side of the paper base material may be impregnated, or both sides may be impregnated, but from the viewpoint of further improving oil resistance and air permeability, it is preferable to impregnate both sides.

[0072] Of course, in this embodiment, the components (A) and (B) may be incorporated by a method other than impregnation, for example, by applying the components (A) and (B) to one side or both sides of the paper substrate using a coating machine such as a bar coater, a die coater, a gravure coater, a roll coater, a blade coater, an air knife coater, or a size press coater.

[0073] In the drying step, the drying method is not particularly limited and a common method can be used, for example, heat press drying, heat roll drying, hot air drying, air drying, room temperature drying, etc. Among these, it is preferable to dry the paper base material impregnated with the processing liquid by heat press drying using a heat press machine.

[0074] As a method of drying the paper substrate impregnated with the processing liquid by hot press drying using a hot press machine, it is preferable to first sandwich the paper substrate impregnated with the processing liquid between filter paper or release paper. By sandwiching the paper substrate impregnated with the processing liquid between filter paper, for example, the water in the processing liquid can be absorbed. Next, it is preferable to sandwich the paper substrate impregnated with the processing liquid between filter paper or release paper, prepare it in the hot press machine, and press and dry it. After drying, the filter paper or release paper can be removed to obtain greaseproof paper. It is also preferable to sandwich the paper substrate carrying the processing liquid between filter paper, remove the filter paper, prepare it in the hot press machine, and then press and dry it.

[0075] If tack (stickiness of the surface of the grease-resistant paper) occurs during the drying process, the dried grease-resistant paper will stick to, for example, a heat press, filter paper, or release paper, resulting in poor papermaking properties. The grease-resistant paper according to this embodiment has a paper base material containing 0.5 to 20 g / m2 of component (A) and component (B) in terms of dry mass. 2By this, the greaseproof paper does not stick to a heat press, filter paper, release paper, or the like after the drying step, and excellent papermaking properties can be achieved. When the (B) component contains at least one selected from the group consisting of the (b1) component and the (b2) component, the mass ratio (A / B) of the total amount of the (A) component to the total amount of the (B) component is 1.5 to 12. This makes it possible to suppress tack particularly effectively, and further improves papermaking properties.

[0076] The drying temperature is preferably, for example, 80°C to 140°C. The drying time is preferably, for example, 10 seconds to 2 minutes. In this manner, the grease-resistant paper according to the present embodiment can be obtained. The grease-resistant paper according to the present embodiment obtained after the drying step may contain the solid content of the processing liquid in a state of being impregnated into the paper base material, or may have the solid content of the processing liquid in a state of a coating layer laminated on the surface of the paper base material.

[0077] After drying, the greaseproof paper may be calendered using a calendering device such as a machine calender, a heat calender, a super calender, or a soft calender.

[0078] As described above, the grease-resistant paper according to the present embodiment can be suitably used as wrapping paper or packaging containers for cooked foods such as fast food, fried foods, and baked foods that contain a lot of oil and moisture, foods that contain a lot of fats and oils such as chocolate, and oils that are practically used for seasoning such as ketchup and sauce, or paper mats such as food trays. The grease-resistant paper according to the present embodiment can be suitably used as a material for food wrapping paper used as a material for packaging food, and can be suitably used as food wrapping paper including the grease-resistant paper according to the present embodiment. It can also be suitably used as a packaging material including the grease-resistant paper. Furthermore, it can be suitably used as a packaging bag including the grease-resistant paper, in which the grease-resistant paper is arranged on the side that contacts the packaged item. EXAMPLES

[0079] The present invention will be described in more detail with reference to the following examples and comparative examples, but the present invention is not limited to the following examples. Note that percentages and parts are based on mass unless otherwise specified.

[0080] <Example 1>

[0081] (Preparation of paper substrate)

[0082] Pulp consisting of 25% by mass of softwood bleached kraft pulp (NBKP) and 75% by mass of hardwood bleached kraft pulp (LBKP) was beaten to a degree of beating of 35°SR using the Shopper-Rigler method, and dispersed in water to a pulp slurry concentration of approximately 2.7% by mass to obtain a pulp slurry.

[0083] To 100 parts by mass of pulp in this pulp slurry, 1.0 part by mass of amphoteric starch (manufactured by GSL Japan, product name: Geltron 245), 1.3 parts by mass of a wet strength agent (manufactured by Seiko PMC, product name: Shikiryoku WS-4020), and 4.0 parts by mass of aluminum sulfate (manufactured by Asahi Chemical Industry Co., Ltd., liquid aluminum sulfate) were added, and the mixture was spun onto a fourdrinier multi-cylinder papermaking machine to produce a thickness of 60 μm and a basis weight of 40 g / m. 2 The glassine paper was made into a paper base material. The paper base material did not contain an internal sizing agent.

[0084] (Formation of greaseproof paper)

[0085] The processing liquid contained 60 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, product name: Sizepine DL-FA20) in solid content, 30 parts by mass of ethylene modified polyvinyl alcohol (PVA, manufactured by Kuraray, product name: Exeval (registered trademark) HR-3010, saponification degree 98-99 mol%) in solid content, and 910 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2The impregnation was performed so that the processing liquid adhered to the paper was 2.9 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 2.9 g / m2. 2 It was.

[0086] <Example 2>

[0087] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0088] (Formation of greaseproof paper)

[0089] A processing liquid containing the same components as those in Example 1 was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, with the total amount of coating (wet adhesion amount) on both sides of the paper substrate being 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 1 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates the size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain the greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 1 g / m2. 2 It was.

[0090] <Example 3>

[0091] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0092] (Formation of greaseproof paper)

[0093] The processing liquid contained 50 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, product name: Sizepine DL-FA20) in solid content, 33.3 parts by mass of ethylene modified polyvinyl alcohol (PVA, manufactured by Kuraray, product name: Exeval (registered trademark) HR-3010, saponification degree 98-99 mol%) in solid content, and 915 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 3.3 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 3.3 g / m2. 2 It was.

[0094] <Example 4>

[0095] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0096] (Formation of greaseproof paper)

[0097] The processing liquid contained 80 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, product name: Sizepine DL-FA20) in solid content, 6.6 parts by mass of ethylene modified polyvinyl alcohol (PVA, manufactured by Kuraray, product name: Exeval (registered trademark) HR-3010, saponification degree 98-99 mol%) in solid content, and 913 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2The impregnation was performed so that the processing liquid adhered to the paper was 2.7 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates the size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain the greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 2.7 g / m2. 2 It was.

[0098] <Example 5>

[0099] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0100] (Formation of greaseproof paper)

[0101] The processing liquid contained 60 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content, 15 parts by mass of cationic polyvinyl alcohol (PVA, manufactured by Mitsubishi Chemical Corporation, product name: Gohsenex K-434, saponification degree 85.5-88.0 mol%) in solid content, and 925 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 2.3 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates the size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain the greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 2.3 g / m2. 2 It was.

[0102] <Example 6>

[0103] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0104] (Formation of greaseproof paper)

[0105] The processing liquid contained 40 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industry, product name: Sizepine DL-FA20) in solid content, 5 parts by mass of polyvinyl butyral (PVB, manufactured by Sekisui Material Solutions Co., Ltd., product name: ULTILOC U5003, saponification degree 98.0 mol% or more) in solid content, and 955 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 1.4 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 1.4 g / m2. 2 It was.

[0106] <Example 7>

[0107] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0108] (Formation of greaseproof paper)

[0109] The processing liquid contained 60 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, product name: Sizepine DL-FA20) in solid content, 8 parts by mass of fully saponified polyvinyl alcohol (PVA, manufactured by Kuraray, product name: Kuraray Poval PVA-117, saponification degree 98.0-99.0 mol%) in solid content, and 932 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above, with the total amount of coating (wet adhesion amount) on both sides of the paper substrate being 30 g / m 2The impregnation was performed so that the processing liquid adhered to the paper was 3 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates the size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain the greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 3 g / m2. 2 It was.

[0110] <Example 8>

[0111] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0112] (Formation of greaseproof paper)

[0113] A processing liquid containing 50 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content, 140 parts by mass of nonionic dextrin (manufactured by Sansho Co., Ltd., product name: MALTRIN M100) in solid content, and 810 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, and the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 1.2g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates the size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain the greaseproof paper (sample). The total amount of dry adhesion (dry adhesion amount) of the processing liquid on both sides of the obtained sample was 6.3g / m2. 2 It was.

[0114] <Example 9>

[0115] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0116] (Formation of greaseproof paper)

[0117] A processing liquid containing 50 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content, 87.5 parts by mass of nonionic dextrin (manufactured by Sansho Co., Ltd., product name: MALTRIN M100) in solid content, and 860 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, and the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 3.9 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 3.9 g / m2. 2 It was.

[0118] <Example 10>

[0119] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0120] (Formation of greaseproof paper)

[0121] A processing liquid containing 50 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content, 35 parts by mass of nonionic dextrin (manufactured by Sansho Co., Ltd., product name: MALTRIN M100) in solid content, and 915 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, and the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2The impregnation was performed so that the processing liquid adhered to the paper was 2.2 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 2.2 g / m2. 2 It was.

[0122] <Example 11>

[0123] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0124] (Formation of greaseproof paper)

[0125] A processing liquid containing 10 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content, 142 parts by mass of waxy corn starch (pregelatinized starch, manufactured by Ingredion, product name: Pen Cote D-MV) in solid content, and 850 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The paper was impregnated so that the processing liquid adhered thereto was 1.0 g / m2. Waxy corn starch is a nonionic starch. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion (dry adhesion amount) of the processing liquid on both sides of the obtained sample was 5.1 g / m2. 2 It was.

[0126] <Example 12>

[0127] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0128] (Formation of greaseproof paper)

[0129] A processing liquid containing 40 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content, 10 parts by mass of cationic starch (manufactured by GSL Japan, product name: Geltron 24) in solid content, and 950 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 1.2 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 1.2 g / m2. 2 It was.

[0130] <Example 13>

[0131] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0132] (Formation of greaseproof paper)

[0133] A processing liquid containing 60 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, product name: Sizepine DL-FA20) in solid content, 33 parts by mass of nonionic starch (acetylated oxidized starch, manufactured by GSL Japan, product name: Dynacoat 68NB) in solid content, and 905 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, and the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2The impregnation was performed so that the processing liquid adhered to the paper was 3.6 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates the size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion (dry adhesion amount) of the processing liquid on both sides of the obtained sample was 3.6 g / m2. 2 It was.

[0134] <Comparative Example 1>

[0135] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0136] (Formation of greaseproof paper)

[0137] A processing liquid containing 100 parts by mass of ethylene-modified polyvinyl alcohol (PVA, manufactured by Kuraray Co., Ltd., product name: Exeval (registered trademark) HR-3010, saponification degree 98-99 mol%) in solid content and 900 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, with the total amount of coating (wet adhesion amount) on both sides of the paper substrate being 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 3.3 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 3.3 g / m2. 2 It was.

[0138] <Comparative Example 2>

[0139] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0140] (Formation of greaseproof paper)

[0141] The processing liquid contained 20 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in terms of solid content, 80 parts by mass of ethylene modified polyvinyl alcohol (PVA, manufactured by Kuraray Co., Ltd., product name: Exeval (registered trademark) HR-3010, saponification degree 98-99 mol%) in terms of solid content, and 900 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 2.8 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion (dry adhesion amount) of the processing liquid on both sides of the obtained sample was 2.8 g / m2. 2 It was.

[0142] <Comparative Example 3>

[0143] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0144] (Formation of greaseproof paper)

[0145] The processing liquid contained 20 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in terms of solid content, 80 parts by mass of ethylene modified polyvinyl alcohol (PVA, manufactured by Kuraray Co., Ltd., product name: Exeval (registered trademark) HR-3010, saponification degree 98-99 mol%) in terms of solid content, and 900 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2The impregnation was performed so that the processing liquid adhered to the paper was 1.5 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 1.5 g / m2. 2 It was.

[0146] <Comparative Example 4>

[0147] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0148] (Formation of greaseproof paper)

[0149] The processing liquid contained 60 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, product name: Sizepine DL-FA20) in solid content, 30 parts by mass of ethylene modified polyvinyl alcohol (PVA, manufactured by Kuraray, product name: Exeval (registered trademark) HR-3010, saponification degree 98-99 mol%) in solid content, and 910 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 0.3 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 0.3 g / m2. 2 It was.

[0150] <Comparative Example 5>

[0151] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0152] (Formation of greaseproof paper)

[0153] A processing liquid containing 100 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content and 900 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, with the total amount of coating (wet adhesion amount) on both sides of the paper substrate being 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 8.0 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion (dry adhesion amount) of the processing liquid on both sides of the obtained sample was 8.0 g / m2. 2 It was.

[0154] <Comparative Example 6>

[0155] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0156] (Formation of greaseproof paper)

[0157] A processing liquid containing 100 parts by mass of nonionic dextrin (product name: MALTRIN M100, manufactured by Grain Processing Corporation) in solid content and 900 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, with the total amount of coating (wet adhesion amount) on both sides of the paper substrate being 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 8.3 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates the size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion (dry adhesion amount) of the processing liquid on both sides of the obtained sample was 8.3 g / m2. 2 It was.

[0158] <Comparative Example 7>

[0159] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0160] (Formation of greaseproof paper)

[0161] A processing liquid containing 50 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content, 35 parts by mass of nonionic dextrin (manufactured by Sansho Co., Ltd., product name: MALTRIN M100) in solid content, and 915 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, and the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 0.4 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 0.4 g / m2. 2 It was.

[0162] <Comparative Example 8>

[0163] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0164] (Formation of greaseproof paper)

[0165] The processing liquid contained 40 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industry Co., Ltd., product name: Sizepine DL-FA20) in solid content, 8 parts by mass of weakly anionic starch (acetylated oxidized tapioca starch, manufactured by San Wan Won Industry Co., Ltd., product name: OXCEL 0610) in solid content, and 952 parts by mass of water. The processing liquid was applied to both sides of the paper substrate obtained above until the total amount of coating (wet adhesion amount) on both sides of the paper substrate was 30 g / m. 2 The impregnation was performed so that the processing liquid adhered to the paper was 3.2 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion of the processing liquid on both sides of the obtained sample was 3.2 g / m2. 2 It was.

[0166] <Comparative Example 9>

[0167] (Preparation of paper substrate) In the same manner as in Example 1, a paper base material was obtained.

[0168] (Formation of greaseproof paper)

[0169] A processing liquid containing 100 parts by mass of polyalkylene polyamine-aliphatic-epichlorohydrin polycondensate (manufactured by Arakawa Chemical Industries, Ltd., product name: Sizepine DL-FA20) in solid content and 900 parts by mass of water was prepared. The processing liquid was applied to both sides of the paper substrate obtained above, with the total amount of coating (wet adhesion amount) on both sides of the paper substrate being 30 g / m 2 The impregnation was performed so that the processing liquid adhered to the paper was 8.0 g / m2. The impregnation device used was a Hishiracopy, a tabletop impregnation device that imitates a size press process. The paper substrate containing the processing liquid was then sandwiched between filter paper and placed in a heat press machine, where it was pressed and dried at a drying temperature of 120°C for 2 minutes. After drying, the filter paper was removed to obtain a greaseproof paper (sample). The total amount of dry adhesion (dry adhesion amount) of the processing liquid on both sides of the obtained sample was 8.0 g / m2. 2 It was.

[0170] <Evaluation method>

[0171] The physical properties of each of the obtained greaseproof papers were evaluated according to the methods described below.

[0172] (Practical oil resistance) The surface of each of the obtained grease-resistant papers was used as a measurement surface, and a drop of edible oil (manufactured by Nisshin Oillio Co., Ltd., product name "Canola Oil") was placed on the measurement surface. After 30 minutes at room temperature, the edible oil was wiped off and traces of edible oil penetration on the measurement surface were visually confirmed (canola oil method). ○: No traces of edible oil penetration were found on the measurement surface. △: Traces of edible oil penetration (oil stains) were observed on the measurement surface. ×: Traces of edible oil penetrating to the back side of the measurement surface (oil seepage) were observed.

[0173] (Air permeability) The air permeability of the grease-resistant paper was measured using the surface of the oil-resistant layer as the measurement surface, in accordance with the Oken method (ISO5636-6) for air permeability testing.

[0174] (Paper making properties) After the heat pressing, the sample stuck to the press was peeled off and the stickiness (tack) of the sample was checked. ◯: The sample did not stick to the filter paper (no tack). ×: The sample stuck to the filter paper (tacky).

[0175] The production conditions and evaluation results of Examples 1 to 7 and Comparative Examples 1 to 5 are shown in Table 1. The production conditions and evaluation results of Examples 8 to 13 and Comparative Examples 6 to 9 are shown in Table 2.

[0176] [Table 1]

[0177] [Table 2]

[0178] From the above, it was confirmed that the present example at least provides an greaseproof paper with high oil resistance and excellent air permeability sufficient for practical use, and has excellent papermaking properties sufficient to suppress tackiness in the manufacturing process. Furthermore, it was also confirmed that the above excellent effects can be obtained even with a non-fluorine-based greaseproof paper that does not contain a fluorine-based resin, as in the present example.

Claims

1. The paper base material contains (A) a fatty acid or a derivative thereof, and (B) at least one selected from the group consisting of (b1) polyvinyl alcohol and its derivatives, (b2) polyvinyl butyral and its derivatives, (b3) cationic or nonionic starch and its derivatives, and (b4) cationic or nonionic dextrin and its derivatives, The content of the component (A) and the component (B) contained in the paper base material is 0.5 to 20 g / m in terms of dry mass. ２ and when the component (B) contains at least one selected from the group consisting of the component (b1) and the component (b2), the mass ratio (A / B) of the total amount of the component (A) to the total amount of the component (B) is 1.5 to 12; Greaseproof paper.

2. The component (A) contains at least one selected from the group consisting of polyamine-aliphatic-epichlorohydrin polycondensates and aliphatic amide derivatives.

2. The greaseproof paper according to claim 1.

3. The component (b1) includes at least one selected from the group consisting of polyvinyl alcohol, alkylene-modified polyvinyl alcohol, and saponified polyvinyl alcohol.

3. The greaseproof paper according to claim 1 or 2.

4. The component (b3) includes at least one selected from the group consisting of starch and acetylated oxidized starch; 3. The greaseproof paper according to claim 1 or 2.

5. Does not contain fluorine-based resin.

3. The greaseproof paper according to claim 1 or 2.

6. The (A) component and the (B) component are impregnated into both sides of the substrate.

3. The greaseproof paper according to claim 1 or 2.

7. The air permeability required in accordance with ISO 5636-6:2015 is 500 seconds or less.

3. The greaseproof paper according to claim 1 or 2.

8. Food packaging paper used as a material for packaging food, A food packaging paper comprising the greaseproof paper according to claim 1 or 2.

9. A packaging material comprising the greaseproof paper according to claim 1 or 2.

10. The greaseproof paper according to claim 1 or 2 is included. A packaging bag, wherein the greaseproof paper is arranged on the side that comes into contact with the packaged item.

11. The method includes a step of impregnating a paper substrate with a processing liquid containing (A) a fatty acid or a derivative thereof, and (B) at least one selected from the group consisting of (b1) polyvinyl alcohol and its derivatives, (b2) polyvinyl butyral and its derivatives, (b3) cationic or nonionic starch and its derivatives, and (b4) cationic or nonionic dextrin and its derivatives, and drying the paper substrate; The content of the component (A) and the component (B) contained in the paper base material is 0.5 to 20 g / m in terms of dry mass. ２ and when the component (B) contains at least one selected from the group consisting of the component (b1) and the component (b2), the mass ratio (A / B) of the total amount of the component (A) to the total amount of the component (B) is 1.5 to 12; How greaseproof paper is made.

12. The impregnation of the processing liquid is performed by impregnating both sides of the base material with the processing liquid. A method for producing the greaseproof paper according to claim 11.

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