JP2003027397A - Molding base paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide molding base paper which can control the development of cracks in a base sheet and the development of the unevenness of bent wrinkled portions, when press-molded, can prevent the cracking and breakage of the sheet surface, has good moldability and high productivity, and gives a molded article having an excellent strength after press-molded. SOLUTION: This molding base paper consisting mainly of natural pulp is characterized by having a basis weight of 100 to 500 g/m<2> and containing an alkyl group-containing compound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded base paper that is preferably used as a material for various packaging containers such as foods and industrial products. More specifically, it has a low environmental load at the time of disposal and is particularly excellent in press molding. It has processability and productivity,
In addition, the present invention relates to a molding base paper that can obtain a press-molded container having excellent strength.

[0002]

2. Description of the Related Art Conventionally, as a packaging material for food packaging containers such as lunch boxes and food trays, or various industrial products such as CD cases and electric component cases, they have been easily molded.
Because it can be mass-produced and manufactured at low cost,
Molded plastic containers have been used. As these plastic containers, for example, a polystyrene foam container obtained by press-molding a polystyrene foam sheet or molding a polystyrene foam bead, or by molding and processing various resins such as polyethylene, polypropylene, polyethylene terephthalate, and polyvinyl chloride. The used containers are widely used.

However, the above plastic container has a problem that the environmental load at the time of disposal is high.
That is, when it is landfilled, it remains semi-permanently without being decomposed and remains in the ground, and when it is incinerated, it burns a lot of calories and easily damages the incinerator. Had a problem that hydrogen chloride gas, which is highly corrosive, might be generated.

Therefore, in recent years, in consideration of environmental problems, recycling problems, resource saving, etc., it can be recycled as a material to replace the above-mentioned plastic container, has a low calorific value when burned for disposal, and has a biodegradable function. However, there is a demand for a container made of pulp, which has a low impact on the environment.

As a molded body having a three-dimensional shape made of such pulp or a material mainly composed of pulp, a pulp mold container has been known. Pulp mold containers have been widely used as packaging containers for many years. The method of molding a pulp mold container is to form a mesh mold having an uneven shape corresponding to the desired container shape, suction-paper-form the pulp slurry into the mesh mold, and dry it to mold the pulp raw material into a desired shape. Is the way to do it. Equipment for preparing pulp slurry must also be attached. Further, there is a problem that drying after papermaking requires a great deal of heat energy, takes time, and has low productivity. Furthermore, it has been difficult to add water resistance and oil resistance to the pulp mold container, which is often required in food tray containers and the like, and the cost has been increased.

In addition to the pulp mold method, as a method for obtaining a molded product from pulp as a raw material, there is known a method of press-forming a base sheet mainly composed of pulp such as paperboard under heating. In this method, a base material sheet in which a ruled line is preliminarily inserted is loaded between male and female molds and press-molded by hot pressing. In such a press molding method, since a molded product can be obtained by pressing once, the productivity is very high. However, unlike a resin or a metal, a base sheet mainly composed of paper pulp such as paperboard generally has poor stretchability and stretchability. Therefore, when deep press molding is performed to form a tray having a certain depth, problems occur such that the base sheet cannot withstand the stretching and is broken, or the surface of the paper layer is cracked. Therefore, when a normal paperboard or the like is used as the base sheet, only a molding container having almost no depth, which can be called a so-called paper plate, can be produced, and the shape of the obtained molding is very limited. It had been.

As a method for solving such a problem, for example, in Japanese Unexamined Patent Publication No. 5-286023, a method of heating and compressing a corrugated paper in which a plurality of corrugated bent portions are provided in a paper material to impart stretchability in a mold is used. However, in Japanese Unexamined Patent Publication (Kokai) No. 6-134898, a method of press-molding while heating a paper material having unevenness formed over the entire surface and imparting stretchability while heating is disclosed in Japanese Unexamined Patent Publication (Kokai) No. 7-214705. There is disclosed a method in which a plurality of base papers subjected to (1) are superposed on each other via an adhesive, and then corrugated to give stretchability, and then press-molded. However, in all of these methods, the base material sheet is preliminarily wrinkled in a corrugated shape or the like so as to have stretchability, impart pressability and then press-mold. Therefore, not only a wrinkling process is required before press working, but wrinkles are present in the entire container after press working, which not only impairs the aesthetic appearance but also is not sufficient in strength.

Further, Japanese Patent Application Laid-Open No. 7-315358 discloses a method of press-molding a corrugated board sheet having a step height of 2 mm or less while heating it with a metal mold. This method uses a corrugated board sheet as a base material. The flute structure absorbs the strain due to the press working to some extent. However, this method is applied only to the corrugated board sheet, and furthermore, it is not possible to sufficiently absorb the unevenness of the wrinkles due to the press working.

Further, in Japanese Unexamined Patent Publication No. 6-239334, there is disclosed a method of press-molding a sheet in which a polyolefin resin is contained in pulp fiber to impart stretchability to the sheet.
-8393 gazette discloses a method of hot pressing a sheet in which thermoplastic resin fibers and pulp fibers are mixed to improve stretchability. However, in these methods, a thermoplastic resin is added to a base sheet mainly composed of paper to impart press molding processability to the paper base sheet. It impairs characteristics such as low environmental load.

Generally, when a molded product has a curved surface portion with a large distortion, it is necessary to form a folding wrinkle in the curved surface portion during press molding to absorb the distortion of the curved surface portion. At this time, the folding wrinkle portion is accordion in the plane direction. As described above, it is folded to form unevenness, and then the unevenness is compressed in the thickness direction by pressing. However, in any of the above-mentioned sheets, the folds and wrinkles generated at this time were large and the moldability was not good.

Further, the surface of the paper layer on the outside of the container is apt to be cracked or broken. When the drawing speed was increased, cracking and breakage were particularly likely to occur, and the moldability was insufficient from this point as well.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to suppress the occurrence of cracks in the base sheet and the unevenness of the fold wrinkles during press molding, and to suppress the cracking and tearing of the surface of the sheet and to obtain good moldability. It is an object of the present invention to provide a forming base paper that has a high productivity and can obtain a formed body having excellent strength after press forming.

[0013]

The present invention has the following configurations. That is, the first aspect of the present invention is a formed base paper containing natural pulp as a main component and having a basis weight of 100 to 500 g / m 2.
^2, which is a molding base paper containing an alkyl group-containing compound.

The second aspect of the present invention is the forming base paper according to the first aspect of the present invention, in which the alkyl group-containing compound is contained in an amount of 0.1 to 5.0% by weight based on the pulp.

The third aspect of the present invention is the forming base paper according to the first or second aspect of the present invention, wherein the linear alkyl group portion of the alkyl group-containing compound has 8 or more carbon atoms.

The fourth aspect of the present invention is that the alkyl group-containing compound is at least one selected from alkyl ketene dimer, wax, polyoxyethylene alkyl ether, and aliphatic quaternary ammonium salt. ~
3 is the forming base paper.

The fifth aspect of the present invention is the forming base paper according to the first to fourth aspects of the present invention, which contains mechanical pulp.

<Pulp Material> The processed base paper of the present invention contains natural pulp as a main component, and examples of the natural pulp include wood fiber (chemical pulp, mechanical pulp), non-wood fiber, waste paper pulp and the like. Are arbitrarily used as needed. Among the wood fibers, examples of the chemical pulp include kraft pulp that uses caustic soda and sodium sulfide during wood chip cooking, and sulfite pulp that uses sulfurous acid and bisulfite. These pulps may be unbleached or bleached.

The mechanical pulp is groundwood pulp (G) obtained by grinding logs with a grinder.
P), refiner ground wood pulp (RGP) obtained by grinding (refining) waste materials from a sawmill, and thermomechanical pulp (TMP) obtained by heating and refining wood chips. . Further, as the TMP, C-TMP is used in which wood chips are chemically treated and then refined under pressure,
Further, there is BC-TMP which has been bleached. Among these mechanical pulps, TMP is particularly preferable in the present invention from the viewpoint of bulkiness and strength of the obtained sheet.

Among these wood fiber pulps, a pulp having a long fiber length obtained from a softwood such as pine, larch, cedar, fir, cypress, etc. is preferably used for improving the stretchability and strength of a paper sheet. . Further, pulp having a short fiber length obtained from hardwoods such as birch, beech, maple, elm and chestnut may be used in combination as long as the effect of the present invention is not impaired.

Examples of the non-wood fibers that can be used in the present invention include bast fibers such as Kozo, Mitsumata, Gampi, flax, timer, kenaf, choma, jute and sunhemp, and seed fibers such as cotton and cotton linters. Varieties, leaf fiber such as Manila hemp, sisal, esparto, bamboo,
Examples include stem fibers such as rice straw, wheat straw, and sugar cane bagasse. Especially Kozo, Mitsumata, Kenaf, Manila hemp, Sisal hemp, cotton, cotton linter, etc.
Since the fiber length is long and the stretchability and strength of the base paper of the present invention can be improved, it is preferably used.

Such non-wood fibers are digested and pulped by a conventional method before use. Examples of the cooking method include a soda cooking method using caustic soda, a kraft cooking method using caustic soda and sodium sulfide, and a sodium sulfite cooking method using caustic soda and sodium sulfite. The non-wood fiber pulp obtained by the above cooking method may be an unbleached product or a bleached product. Further, non-wood fibers can be pulped by grinding (refining) under pressure and heating using a refiner as in the case of wood fibers.

Waste paper pulp also exists as a natural pulp used in the present invention. Examples of waste paper pulp include corrugated cardboard waste paper, magazine waste paper, and the like. In particular, corrugated cardboard waste paper is preferably used because it can improve the stretchability and strength of the molded base paper.

Generally, in the case of producing a draw-formed body having a curved surface portion with a large strain, it is necessary to form creases on the curved surface portion at the time of molding to absorb the strain. At this time, the folds and wrinkles are folded in the plane direction like an accordion to form irregularities, and then the irregularities are compressed in the thickness direction. Therefore, in order to obtain good moldability, it is preferable to reduce the density of the molding base paper, but for that purpose, it is preferable to use rigid pulp fibers.

Generally, pulp fibers are beaten (mechanical external force is applied to the pulp fibers to fibrillize a part of the cell wall of the fibers) to obtain a uniformly formed paper sheet. In order to maintain sex, beating must be kept mild. The degree of beating is, for example, a freeness (Tappi T-227 Canadian standard type) of 500 mlcsf or more in the case of chemical pulp and 18 in the case of mechanical pulp.
0 mlcsf or more, 50 for hemp pulp and kenaf pulp
0mlcsf or more, 500m for corrugated waste paper pulp
It is preferably lcsf or more. A beater, a conical refiner, a drum refiner, a disc refiner, or the like is used for beating pulp fibers.

The various pulp fibers described above can be used alone or in combination of two or more. Also,
If necessary, synthetic resin fibers can be mixed within a range that does not impair the effects of the present invention. Examples of the synthetic resin fibers that can be used include polyethylene fibers, polypropylene fibers, polyamide fibers, polyethylene terephthalate fibers, polybutylene terephthalate fibers, and the like.

<Alkyl Group-Containing Compound> The alkyl group-containing compound used in the present invention blocks a part of hydrogen bonds between pulp fibers, promotes the displacement between the fibers, and imparts flexibility to the molded base paper. As a result, the formability of the forming base paper is improved.

The alkyl group-containing compound used in the present invention preferably has a linear alkyl group moiety having 8 or more carbon atoms. When the number of carbon atoms in the linear alkyl group portion is less than 8, there is a possibility that the molded base paper may not exhibit sufficient flexibility.

The alkyl group-containing compound used in the present invention is specifically an alkyl ketene dimer (hereinafter referred to as A
KD), paraffin wax, low molecular weight polyethylene wax, polyoxyethylene alkyl ether, aliphatic quaternary ammonium salt and the like. Among these compounds, AKD and waxes are particularly preferably used because they can impart not only flexibility but also water resistance to the molded base paper. As the polyoxyethylene alkyl ether, one having an addition mole number of ethylene oxide in the range of 1 to 20 moles is particularly preferably used. It should be noted that these alkyl group-containing compounds may be used in combination of two or more kinds as required.

The amount of the alkyl group-containing compound used in the present invention added to the base paper for molding is preferably 0.1 to 5.0% by weight, more preferably 0.2 to 4.0% by weight, based on the pulp. From the viewpoint of cost efficiency, 0.4 to 2.0% by weight is most preferable. If the addition amount is less than 0.1% by weight, sufficient flexibility may not be exhibited in the forming base paper. On the other hand, when the amount added exceeds 5.0% by weight, the effect of imparting flexibility reaches a ceiling.

As a method for adding the alkyl group-containing compound, for example, an emulsion dispersion or aqueous solution of the alkyl group-containing compound can be added to the pulp slurry.

<About paper making of molded base paper> Examples of the paper-making chemicals used for making the molded base paper of the present invention include sizing agents, paper strength agents and yield improvers used in ordinary paper making. As the sizing agent, there are internally added sizing agents such as AKD, styrene acrylic resin and rosin.
Paper strength agents, yield improvers such as polyacrylamide resins, polyamide epichlorohydrin resins, polyethyleneimine and its derivatives, polyethylene oxide, polyamines, polyamides, polyamide polyamines and their derivatives, cationic and amphoteric starch, oxidized starch,
Organic compounds such as carboxymethylated starch, vegetable gum and polyvinyl alcohol, and inorganic compounds such as sulfuric acid band, alumina sol, colloidal silica and bentonite are used in appropriate combination.

As the filler, talc, kaolin,
Calcined kaolin, clay, diatomaceous earth, heavy calcium carbonate, magnesium carbonate, aluminum hydroxide, titanium dioxide, magnesium sulfate, silica, aluminosilicate, bentonite and other mineral fillers, polystyrene particles, urea formalin resin particles, etc. Fillers and the like can be appropriately selected and used in combination. Further, a papermaking additive such as a dye, a pH adjusting agent, a slime control agent, an antifoaming agent, and a sticky agent can be appropriately used according to the application.

A slurry of raw materials and chemicals made of the above materials is made into paper by a conventional method. The papermaking machine may be any of ordinary fourdrinier paper machine, cylinder paper machine, shortnet paper machine, inclined paper machine, various combination paper machines, etc., and is not particularly limited. The drying may be any of a normal multi-cylinder dryer, a Yankee dryer, a through dryer, etc., and is not particularly limited. Further, in the present invention, the paper support obtained from the paper making step may be not only a single layer but also a laminated paper having two or more layers.

It is also possible to apply starch, polyvinyl alcohol, various surface sizing agents, pigments and the like to the surface of the sheet by a coating method such as a size press or a gate roll. Further, as necessary, in order to impart water resistance to the surface of the molded base paper, as a paint, emulsions of waxes such as microcrystalline wax and paraffin wax, latexes such as SBR latex and polyvinylidene chloride latex, and acrylic emulsions. , Synthetic resin emulsions such as self-emulsifying polyolefins and polyethylene copolymer resin emulsions can be applied. The coating equipment for these water-resistant paints may be any of commonly used bar coaters, air knife coaters, roll coaters, blade coaters, gate rolls, size presses, etc., and is not particularly limited.

<Basis weight> The basis weight of the molded base paper in the present invention is 100 to 500 g / m ² , and more preferably 200 to 400 g / m ² . 100 g / m
^When it is less than ^{2, the} molded product obtained after press molding does not exhibit sufficient strength. If it exceeds 500 g / m ² , sufficient moldability cannot be obtained.

<Synthetic Resin Layer> A synthetic resin layer may be provided on the surface of the molded base paper obtained in the present invention, if necessary. Examples of the synthetic resin used include polyolefin resins such as polyethylene, polypropylene and polymethylpentene, saturated polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polyamide resins such as nylon, ethylene / vinyl alcohol copolymer, polystyrene. Resin, polyacrylonitrile resin, etc. are mentioned, and these synthetic resins are coated with a simple substance or a mixture or a mixture of two or more types to form a water resistant coating. The method for laminating the synthetic resin layer may be any of commonly used wet lamination, hot melt lamination, extrusion lamination, dry lamination, thermal lamination and the like, and is not particularly limited.

<Draw forming> In general, draw forming is to form a blank sheet by punching a forming base paper into a predetermined shape before forming, and then press the blank sheet to obtain a formed body. When the molded body has a curved surface portion with a large distortion, a ruled line is formed on the blank sheet, and during drawing, creases are formed around this ruled line to absorb the distortion of the curved surface portion. For the formation of ruled lines, a wooden board or metal plate (ruled line type) with a plurality of metal blades with a thickness of about 1 mm attached is used to form the ruled lines, and this ruled line type metal blade is pressed against the forming base paper. Form ruled lines. The formation of such ruled lines can be performed at the same time as blanking the blank sheet. The blank sheet thus obtained is 1
It is possible to draw and form one sheet or two or more sheets.

The press-forming apparatus used in the draw forming is not particularly limited, but a metal forming die made up of a male die and a female die used in general press forming can be used. The temperature at the time of drawing is preferably 100 to 200 ° C, more preferably 110 to 150 ° C from the viewpoints of moldability and deterioration of pulp fiber. Molding temperature is 1
If the temperature is lower than 00 ° C, the pulp fibers will not be sufficiently softened to obtain good moldability, and if the temperature exceeds 200 ° C, the pulp fibers will be deteriorated, which is not preferable. From the viewpoint of workability, the heating method at this time is preferably performed by heating the metal mold for molding. Examples of means for heating the metal mold for molding include a heating method using an electric heater, a steam heating method, a hot air heating method, an oil circulation method, and the like, but an electric heating method with a simple device is preferable.

The pressing pressure during draw forming is preferably in the range of 10 to 100 kgf / cm ² from the viewpoints of formability and paper layer destruction. If the pressing pressure is lower than 10 kgf / cm ² , the compressive deformation of the ruled line will be insufficient and 100 kgf
If it exceeds / cm ² , the paper layer in the wrinkled portion is destroyed, which is not preferable. The pressing time during draw forming is preferably in the range of 2 to 10 seconds from the viewpoint of formability and workability.

<Water content of processed base paper> The processed base paper preferably has a water content of 10 to 20% by weight before entering the molding machine. More preferably 11 to 18% by weight
Is. The most preferable range is 12 to 15%.
Among these, 12.5-14.5 wt% is optimal. By setting the water content within the above range, plasticization of the molded base paper occurs to improve the moldability, and the destruction of the paper layer during press molding can be reduced. If the water content is less than 10% by weight, the paper layer is likely to break during press molding, and the resulting molded article may not have sufficient rigidity. On the other hand, if it is 20% by weight or more, blisters, that is, the paper layer of the base paper for molding may be peeled off during the heat and pressure molding, which is not preferable in terms of appearance and may cause a decrease in strength. Also,
When the amount of water increases, it takes time to dry the molded body, which may cause a problem such as a decrease in productivity. The water content of the base paper in the present invention means the weight% of the water based on the absolute dry weight of all pulp in the processed base paper.

As a method of controlling the humidity of the molded base paper, any method such as water spraying, coating, steam spraying or the like can be used for the base paper. Regarding the timing of humidity control, water is supplied to the base paper by the above method immediately before press molding, or it is transported and stored in a state where the water content is maintained by humidifying after leaving the dryer during paper making. Method etc. are mentioned.

[0043]

The present invention will be described in detail with reference to examples. In addition, unless otherwise specified, the weight% means solid content weight. <Example 1> Commercially available NB using a disc refiner
KP to 550 mlcsf (Tappi T-227 Canadian standard type) and radiatapine TMP to 300 mlc
After each beating to sf, AKD emulsion (size pine 902-20,
Arakawa Chemical Industry Co., Ltd., alkyl group carbon number 16 or 18)
Was added so that the solid content was 1.0% by weight of each pulp. Using these as paper materials, a first layer NBKP 40 g / m ² and a second layer TMP 250 g /
m ^2, and to produce a molding base paper having a three-layer structure of the third layer NBKP40g / m ^2.

<Example 2> Molded base paper was manufactured in exactly the same manner as in Example 1 except that the amount of the internal additive added to each stock was changed to 0.4% by weight based on the solid content.

<Example 3> Molded base paper was produced in exactly the same manner as in Example 1 except that the amount of the internal additive added to each stock was 2.0% by weight based on the solid content.

Example 4 550 mlc of commercially available NBKP
After beating into sf, the same internal additive as in Example 1 was added so that the solid content was 1.0% by weight of pulp, and the stock was used to prepare a one-layer 300 g / m ² molded base paper. Manufactured.

Example 5 A wax emulsion (Parazid ASP, Meisei Chemical Industry Co., Ltd., alkyl group carbon number 16 to 40) was used as an internal additive, and the solid content was 1.0.
A molded base paper was manufactured in exactly the same manner as in Example 1 except that the addition of wt% was performed.

Example 6 A cetyltrimethylammonium chloride (Cathogen TMP, Daiichi Kogyo Seiyaku Co., Ltd., alkyl group carbon number 16) was used as an internal additive, except that 1.0% by weight of solid content was added. A molded base paper was manufactured in exactly the same manner as in Example 1.

Example 7 Polyoxyethylene oleyl ether (ethylene oxide 5 mol adduct, BLAUNON EN-905, Aoki Yushi Kogyo Co., Ltd., alkyl group carbon number 18) was used as an internal additive to obtain a solid content. A molded base paper was manufactured in exactly the same manner as in Example 1 except that 1.0% by weight was added.

<Example 8> Polyoxyethylene tridecyl ether (5 mol ethylene oxide adduct, Fine Surf TD-50, Aoki Yushi Kogyo Co., Ltd., alkyl group carbon number 10) was used as an internal additive, and solid content was used. Molded base paper was produced in the same manner as in Example 1 except that the above amount was added in an amount of 1.0% by weight.

Example 9 Except that octyltrimethylammonium chloride (Cationogen 08, Dai-ichi Kogyo Seiyaku Co., Ltd., carbon number of alkyl group 8) was used as an internal additive, and 1.0% by weight as solid content was added. A molded base paper was manufactured in the same manner as in Example 1.

<Comparative Example 1> Except that no internal additive was added,
A molded base paper was manufactured in the same manner as in Example 1.

<Comparative Example 2> Except that no internal additive was added,
A molded base paper was manufactured in the same manner as in Example 2.

<Comparative Example 3> Polyoxyethylene phenyl ether (5 mol ethylene oxide adduct, BLAUNON PH-5, Aoki Yushi Kogyo Co., Ltd.) as an internal additive,
A base paper for molding was produced in the same manner as in Example 1 except that (without an alkyl group) was used and 1.0% by weight was added as a solid content.

Using the forming base papers obtained in Examples and Comparative Examples, the formability was evaluated by the following method. [Evaluation method] Steam was applied to the forming base paper to adjust the moisture content in the paper to 12%, and then punched into a circular shape, and at the same time, radial ruled lines were stamped from the center to obtain a blank sheet (Fig. 1). The blank sheet was heat-pressed at 130 ° C. and 35 kg / cm ² by a test press molding machine (manufactured by Daiichi Koki Co., Ltd.) using male and female uneven cup container molding dies, and the height was 7 cm, bottom surface. The part is a circular shape with a diameter of 6 cm,
A cup-shaped draw-molded product having a circular opening having a diameter of 12 cm and a flange having a width of 0.8 cm and having a curved surface from the side wall to the bottom surface was formed (FIG. 2). The moldability at this time was evaluated as follows, and the results are shown in Table 1. ◯: Moldable, the outer layer of the molded body did not break, and the surface of the molded body was smooth. X: Moldable, but tear occurred in the outer layer of the molded body.

[0056]

[Table 1]

From Table 1, it is found that the forming base paper according to the present invention is excellent in formability without cracking or tearing on the outer paper layer surface at the time of forming even for a deep drawing such as a cup. Recognize.

[0058]

EFFECTS OF THE INVENTION According to the present invention, it is possible to suppress the occurrence of cracks in the base sheet and the unevenness of the folded wrinkles during press molding, and to suppress the cracking and tearing of the sheet surface, which has good moldability and high productivity. In addition, it becomes possible to provide a forming base paper that can obtain a formed body having excellent strength after press forming.

[Brief description of drawings]

Figure 1: Blank sheet

FIG. 2 is a perspective view of a draw-formed body.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3E033 BA10 BB04 CA20 FA01 GA03                 4L055 AA02 AC03 AC06 AG35 AG40                       AG51 AG88 AG99 AH29 AH50                       FA30 GA05

Claims (5)

[Claims] 1. A processed base paper containing natural pulp as a main component, having a basis weight of 100 to 500 g / m ² , and containing an alkyl group-containing compound. 2. An alkyl group-containing compound is used for pulp.
1 to 5.0 wt% is contained, The shaping | molding base paper of Claim 1 characterized by the above-mentioned. 3. The processed base paper according to claim 1, wherein the straight-chain alkyl group portion of the alkyl group-containing compound has 8 or more carbon atoms. 4. The alkyl group-containing compound is at least one selected from alkyl ketene dimers, waxes, polyoxyethylene alkyl ethers, and aliphatic quaternary ammonium salts. Molded base paper. 5. The molded base paper according to claim 1, which contains mechanical pulp.