JP6219213B2 - Fountain pen paper - Google Patents

Description

  The present invention relates to a fountain pen paper and relates to a paper excellent in writing with a fountain pen.

  A fountain pen contains a water-based ink in a pen shaft made of a material such as stainless steel or gold alloy, and the ink held inside the pen shaft is split into a bifurcated pen tip through a pen core with a groove due to capillary action. It has a structure for writing by being supplied continuously. Therefore, compared with other writing instruments such as a ballpoint pen and a sign pen, the ink dries slowly, and the stroke is easily thickened by bleeding.

  However, fountain pens are more expensive than other writing instruments, and are inferior to other writing instruments in terms of functionality, such as quick drying of ink and restriction of writing pressure, but unique handwriting and soft writing that other writing instruments do not have. It is an advantage to have a taste.

  As paper suitable for writing a fountain pen, Patent Document 1 proposes an ink jet paper that can increase the sizing degree of the base paper and reduce bleeding by incorporating a cationic polymer into the base paper. The use by writing with is also mentioned. However, this proposal is not intended for fountain pen paper, and no mention is made of improvement of the stroke due to ink bleeding.

JP 2005-254501 A

  The present invention provides paper that is optimal for fountain pen writing. In particular, an object of the present invention is to provide a fountain pen paper that does not bleed ink of a fountain pen and has a good aesthetic appearance.

  As a result of diligent research to achieve the above object, the present invention can eliminate the thickening of the drawn line, which was a disadvantage of a fountain pen, by including a polyacrylic acid-based sizing agent in the writing layer. And found the present invention.

  The fountain pen paper of the present invention is a fountain pen paper in which a writing layer containing a white pigment, an adhesive, and a polyacrylic acid-based sizing agent is provided on at least one side of a base paper.

  The polyacrylic acid-based sizing agent is preferably 0.2% by mass or more based on the adhesive.

  ADVANTAGE OF THE INVENTION According to this invention, the paper which can write a beautiful drawn line with a fountain pen can be provided.

  Hereinafter, embodiments of the fountain pen paper according to the present invention will be described in detail.

The fountain pen paper according to the present invention is obtained by providing a writing layer containing a white pigment, an adhesive, and a polyacrylic acid-based sizing agent on a base paper.

  Examples of the white pigment used in the present invention include light calcium carbonate, heavy calcium carbonate, kaolin, calcined kaolin, deramikaolin, clay, talc, magnesium carbonate, magnesium oxide, satin white, aluminum hydroxide, calcium hydroxide, hydroxide Coating, such as zinc, zinc oxide, barium sulfate, titanium oxide, clay, synthetic amorphous silica, inorganic white pigments such as bentonite, polystyrene resin particles, urea formalin resin particles, hollow organic pigments, organic pigments such as porous particles For example, at least one of various types of pigments conventionally used can be blended as appropriate. In particular, it is preferable to use deramikaolin because the paper can draw the smooth writing feel of a fountain pen. When deramikaolin is used as a white pigment, it is preferably blended in an amount of 50 to 100% by mass with respect to the white pigment.

  Known adhesives can be used in the present invention. For example, starch or derivatives thereof, modified starch such as esterified starch, phosphate esterified starch, and etherified starch, casein, soy protein, polyvinyl alcohol, One or more types of emulsion latex resins, polyurethane resins, melamine resins, urea resins, and the like made of various copolymers such as styrene-butadiene latexes, acrylic latexes, styrene acrylic latexes, and vinyl acetate latexes may be appropriately used. it can.

  It is preferable to use the blending amount of the adhesive with respect to the white pigment in the range of 10 to 30% by mass. If it is less than 10% by mass, there is a risk that white pigment or the like may fall off due to insufficient surface strength. On the other hand, when the amount is more than 30% by mass, the ratio of the adhesive in the coating layer increases, and when the amount of the adhesive is large, there is a possibility that the drawn lines become thicker / bleeded and the drying property is deteriorated.

In the present invention, by using a polyacrylic acid-based sizing agent, there is an effect of improving the thickness of the drawn line of ink when writing with a fountain pen. Polyacrylic acid type is the following general formula:

で表されるもの、またはこの一部の水酸基が変性されているものを含む。例えば、ポリアクリル酸、ポリアクリル酸塩、ポリアクリル酸エステル、ポリメタクリル酸、ポリメタクリル酸塩、ポリアクリル酸アミドが挙げられる。

Or those in which some of the hydroxyl groups are modified. For example, polyacrylic acid, polyacrylic acid salt, polyacrylic acid ester, polymethacrylic acid, polymethacrylic acid salt, and polyacrylic acid amide are mentioned.

The polyacrylic acid-based sizing agent is preferably blended in an amount of 0.2% by mass or more, more preferably 0.4% by mass or more, and more preferably 1.0% by mass or more based on the adhesive. Is more preferable. If the blending ratio is low, there is a possibility that the thickening of the drawn line cannot be prevented when writing a fountain pen.

In general, in order to suppress bleeding of water-soluble ink, there is a method of applying a sizing agent to the base paper, but in the present invention, a sizing agent other than the polyacrylic acid sizing agent causes a problem. For example, styrenic / acrylic sizing agents cannot completely prevent thickening of drawn lines. In addition, cationic sizing agents such as alkyl ketene dimers are not preferable because aggregation occurs when a coating liquid described later is formed.

In the present invention, there is no particular limitation on the method of providing the writing layer containing the white pigment, adhesive and polyacrylic acid-based sizing agent on the base paper, and a known coating technique, impregnation apparatus, printing technique, etc. are used. It is done. For example, a size press coater, gate roll coater, bill blade coater, air knife coater, blade coater, rod coater, rod metering coater, curtain coater, die coater, gravure coater and the like can be used.

Writing layer providing the base paper is ^preferably from ^{1g / m 2 ~20g / m 2} , more preferably 3 to 15 g / ^{m 2,} still more preferably 4~10g / ^{m 2.} If it is less than 1 g / m ² , the side edges of the line drawing written with a fountain pen may not be smooth, and the appearance may not be clean. On the other hand, when the coating amount exceeds 20 g / m ² , drying of the ink of the fountain pen deteriorates.

  In addition to the white pigment, the adhesive, and the polyacrylic acid-based sizing agent, various auxiliary agents can be used for the coating liquid for providing the writing layer. For example, water retention agents, crosslinking agents, curing agents, antifoaming agents, thickeners, water resistance agents, mold release agents, lubricants, preservatives, antifungal agents, dyes, colored pigments, etc. may affect the performance of the present invention. It can be used in a range that does not exist.

  The base paper used in the present invention is not particularly limited, such as the type of raw materials, the papermaking method such as acidic papermaking or neutral papermaking, the type of papermaking machine, surface properties, basis weight, and the like. For example, wood pulp such as kraft pulp, sulfite pulp, soda pulp, dissolving pulp, semi-chemical pulp, mechanical pulp, thermomechanical pulp, and groundwood pulp, cotton, linter, bamboo, bamboo, kenaf, cocoon, three bases, husk, hemp One or more kinds of fibers such as non-wood pulp such as SEP, rayon, polyester, etc., waste paper, etc. If necessary, light calcium carbonate, heavy calcium carbonate, kaolin, clay, talc, synthetic non Fillers such as crystalline silica and titanium oxide, sizing agents such as rosin sizing agent, reinforced rosin sizing agent, emulsion sizing agent, alkyl ketene dimer, alkenyl succinic anhydride, and cation used in ordinary acidic papermaking or neutral papermaking Starch, pregelatinized starch, amphoteric starch, polyacrylamide, polyvinyl alcohol Paper strength enhancers such as polyamine polyamide epichlorohydrin, sulfuric acid bands, freeness improvers, yield improvers, pitch control agents, slime control agents, polymer fixing agents, antifoaming agents, dyes, colored pigments, fluorescent whitening agents, etc. The raw materials and chemicals generally used for papermaking can be used.

As the paper machine, a long net paper machine, a circular net paper machine, a combination of a long net and a circular net, a twin wire paper machine, an on-top twin wire paper machine or the like can be used as necessary. The surface properties of the base paper include the embossing treatment with patterns such as blankets, rolls, canvas, etc., calendar treatment with smoothness of chilled, cotton, resin, etc. Etc. Basis weight monolayer, multilayer, by ^lamination, those 20g / ^{m 2} ~400g / m 2 are generally used.

  In addition, synthetic paper mainly composed of a synthetic material such as polyolefin, films, and sheets such as wet or dry nonwoven fabric can be used as the base paper. In addition, clear paper such as starch, polyvinyl alcohols, polyacrylamides, or coated paper made of pigment and adhesive can be used as the base paper.

Hereinafter, the present invention will be specifically described with reference to examples. Of course, the present invention is not limited to these. In addition, the part and% in an Example and a comparative example show a mass part and mass%, respectively.

The appearance of the drawn line when writing on the fountain pen paper with a fountain pen was visually evaluated according to the following three-step criteria, and Δ or higher was determined to be acceptable.
○: A thin and beautiful line can be drawn without bleeding. △: There is no bleeding and a thin line that is not thin but there is no problem with its thickness. ×: Slight bleeding is observed, the line is thick and there is a problem with the appearance.

Example 1
As white pigment, 100 parts of deramikaolin (trade name: HYDRAPLATE LV, manufactured by Huber), 5 parts of phosphate esterified starch (trade name: MS # 4600, manufactured by Nippon Food Processing Co., Ltd.) and styrene-butadiene latex (trade name) Product name: Smartex SN-307R, manufactured by Nippon A & L Co., Ltd. (15 parts) was mixed, and polyacrylic acid sizing agent (trade name: Sunsizer SA501-20, manufactured by San Nopco) was added to the adhesive. Two parts were mixed to prepare a coating solution having a solid content of 40.0%. Prepare high-quality paper with a basis weight of 81.4 g / m ^{2 as} the base paper, apply the coating liquid on one side of this base paper so that the dry mass is 4 g / m ^2, and dry it. Got.

(Example 2)
A fountain pen paper was obtained in the same manner as in Example 1 except that 100 parts of kaolin (trade name: ULTRA WHITE 90, manufactured by BASF) was used as the white pigment.

(Example 3)
A fountain pen paper was obtained in the same manner as in Example 1 except that 0.2 part of the polyacrylic acid sizing agent was mixed with the adhesive.

(Comparative Example 1)
A fountain pen paper was obtained in the same manner as in Example 1 except that a styrene / acrylic sizing agent (trade name: surface sizing agent SS2530, manufactured by Seiko PMC) was used instead of the polyacrylic acid sizing agent.

(Comparative Example 2)
A fountain pen paper was obtained in the same manner as in Example 1 except that an olefin polymer sizing agent (trade name: surface sizing agent SS2550, manufactured by Seiko PMC) was used instead of the polyacrylic acid sizing agent.

(Comparative Example 3)
A cationic alkyl ketene dimer sizing agent (trade name: surface sizing agent SE2401, manufactured by Seiko PMC) was used in place of the polyacrylic acid sizing agent, but the coating solution was agglomerated and used as a coating solution. could not.

(Comparative Example 4)
A fountain pen paper was produced in the same manner as in Example 1 except that no polyacrylic acid sizing agent was used.

As a result of Table 1, the appearance of the drawn line was good in Examples 1 to 3 in which a polyacrylic acid-based sizing agent was blended. On the other hand, in Comparative Examples 1 and 2 using a sizing agent other than the polyacrylic acid sizing agent, the drawn lines were thick and the appearance was poor. Similarly, Comparative Example 4 in which no sizing agent was used also had a thick drawn line.

Claims (2)

  Fountain pen paper in which a writing layer containing a white pigment, an adhesive, and a polyacrylic acid-based sizing agent is provided on at least one side of the base paper.   The fountain pen paper according to claim 1, wherein the polyacrylic acid-based sizing agent is 0.2 mass% or more based on the adhesive.