JP4346891B2 - Ballpoint pen for writing cloth - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ballpoint pen for cloth writing in which ink is directly filled in an ink containing tube, and more particularly to a ballpoint pen for cloth writing having excellent bleed resistance when written on a cloth such as a woven fabric or a nonwoven fabric.
[0002]
[Prior art]
As a conventional marking pen for fabric writing, for example, it is disclosed to use an ink characterized by containing an emulsion resin having a film forming temperature of 0 ° C. or lower or a glass transition temperature of 0 ° C. or lower and a pigment. (See Patent Document 1). In addition, emulsion resin and pigment comprising resin particles having a film forming temperature of 0 ° C. or lower or a glass transition temperature of 0 ° C. or lower and copolymerizing monomers having functional groups such as nitrile group, carboxyl group, and vinyl group It is disclosed to use an ink characterized in that it contains (see Patent Document 2).
[0003]
[Patent Document 1]
JP-A-8-188735 (first page, second line to fifth line)
[Patent Document 2]
JP-A-8-209052 (first page, second line to sixth line)
[0004]
[Problems to be solved by the invention]
However, handwriting written on fabrics such as woven fabrics and non-woven fabrics using the above-mentioned conventional marking pen for writing on cloth is excellent in terms of washing resistance, but is not sufficiently satisfactory in terms of bleeding resistance. It was.
An object of the present invention is to provide a ballpoint pen for writing fabric that has excellent bleed resistance of handwriting when written on a fabric such as woven fabric or non-woven fabric.
[0005]
[Means for Solving the Problems]
The present invention provides an ink containing tube with a ballpoint pen tip attached to one end. Pigment (except for white pigment only) And at least a resin emulsion having a minimum film-forming temperature of 25 ° C. or less (excluding an ethylene / vinyl acetate resin emulsion), xanthan gum and water, and having a viscosity of 100 to 30000 mPa · s (25 ° C.) directly filled. The following is a ballpoint pen for cloth writing.
[0006]
Details will be described below.
1 and 2 show a ballpoint pen for cloth writing according to the present invention. The ballpoint pen tip 1 is composed of a ball 2 and a ball holder 3 for holding the ball. The ball 2 is made of silicon carbide, tungsten carbide, carbide or the like. Metals such as stainless steel and white and abrasion-resistant resins such as polyacetal and polybutylene terephthalate are used. As the shape and the like of the ballpoint pen tip 1, those generally used in the past can be used. In particular, the caulking portion 4 continuous to the foremost edge portion of the ball holder has a radius of 0.03 to 0.20 mm. Those formed with a curved shape are preferably used. When writing on the cloth with a ballpoint pen, this is done by pressing the ball at the tip of the pen tip, but at this time, the leading edge part is also in contact with the cloth, but continues to the leading edge part. This is because the caulking portion has an R-shaped curved surface so that the cloth is not scratched.
[0007]
The ink storage tube 5 to which the ballpoint pen tip is attached is often transparent or translucent so that the remaining amount of ink can be confirmed. For example, those made of polyethylene or polypropylene are well known. Usually, the inner diameter of the ink containing tube 5 is about 2 to 6 mm, and its length is about 100 to 150 mm. If necessary, a silicone-based or fluorine-based water / oil repellent agent can be applied to the inside of the ink containing tube 5. The ink storage tube 5 is directly filled with ink I and an ink backflow prevention body G which will be described later.
[0008]
The ink is a handwriting, and contains at least a pigment, a resin emulsion having a minimum film forming temperature of 25 ° C. or less, xanthan gum, and water, and further has a viscosity of 100 to 30000 mPa · s (25 ° C.).
[0009]
The pigment is used as a colorant, and conventionally known pigments can be used. Specific examples are: Special Black 6, S170, S610, 5, 4, 4A, 550, 35, 250, 100, Printex 150T, U, V, 140U, 140V, 95, 90, 85, 80, 75, 55, 45, P, XE2, L6, L, 300, 30, 30, 35, 25, 200 A, G (Degussa Japan Co., Ltd.), # 2400B, # 2350, # 2300, # 2200B, # 1000, # 950, # 900, # 850, # MCF88, MA600, MA100, MA7 MA11, # 50, # 52, # 45, # 44, # 40, # 33, # 32, # 30, CF9, # 20B, # 4000B (Mitsubishi Chemical Industry Co., Ltd.), MONARCH 130 0, 100, 1000, 900, 880, 800, 700, MOGUL L, REGAL 400R, 660R, 500R, 330R, 300R, 99R, ELFTEX 8, 12, BLACKPEARLS 2000 ( (Made by Cabot Corp., USA), Raven 7000, 5750, 5250, 5000, 3500, 2000, 1500, 1255, 1250, 1200, 1170, 1060, 1040, 1035 1020, 1000, 890H, 890, 850, 790, 780, 760, 500, 450, 430, 420, 410, 22, 22, 16, 14 825 oil Beads, H20, C, Conductex 975, 90 , Carbon black such as SC (Columbian Carbon Japan Co., Ltd.), KA-10, 10P, 15, 20, 20, 35, 60, 80, 90, KR- 310, 380, 460, 480 (above, manufactured by Titanium Industry Co., Ltd.), P25 (produced by Nippon Aerosil Co., Ltd.), etc., BS-605, 607 (above, manufactured by Toyo Aluminum Co., Ltd.) ), Metal powder pigments such as bronze powder P-555, P-777 (above, manufactured by Nakajima Metal Foil Industry Co., Ltd.), bronze powder 3L5, 3L7 (above, manufactured by Fukuda Metal Foil Industry Co., Ltd.), Inorganic pigments such as black iron oxide, yellow iron oxide, red iron oxide, ultramarine, bitumen, cobalt blue, chrome green, chrome oxide, Hansa Yellow-10G, 5G, 3G, 4, GR, A, Benzidine Low, Permanent Yellow NCG, Tartrazine Lake, Quinoline Yellow, Sudan 1, Permanent Orange, Industren Brilliant Orange GN, Permanent Brown FG, Para Brown, Permanent Red 4R, Fire Red, Brilliant Carmine BS, Pyrazolone Red, Lake Red C, Examples thereof include organic pigments such as quinacridone red, brilliant carmine 6B, Bordeaux 5B, thioindigo red, fast violet B, dioxazine violet, alkali blue lake, phthalocyanine blue, indigo, acid green lake, and phthalocyanine green. In addition, inorganic fluorescent pigments such as zinc sulfide, zinc silicate, zinc cadmium sulfate, calcium sulfide, strontium sulfide, and calcium tungstate can be used. The above pigments can be used alone or in combination. The amount used is preferably 1 to 50% by weight based on the total amount of ink.
[0010]
Furthermore, the use of a water-based ink base in which a pigment is dispersed in an aqueous medium is advantageous for producing a pigment ink. Specifically, Fuji SP Black 8031, 8119, 8167, 8167, 8276, 8381, 8406, FujiSP RED 5096, 5111, 5193, 5220, 5543, 5544, Fuji SP Bordeaux 5500, Fuji SPBlue 6062, 6133, 6134, 6401, Fuji SPGure 7051, Fuji SP Yellow 4060, 4178, 4218, Fuji SP Violet 9011, Fuji SP Pink 9524, 9527, Fuji SP5 34F As described above, Fuji Color Co., Ltd.), Emacol Black CN, Emacol Blue FBB, FB, KR, Emacol Green LXB, Emacol Violet BL, Emacol Brown 3101, Emacol Carmine FB, Emacol RED BS, Emacol Orange R, Emacol Yellow FD, IRN, 3601, FGN, G10, G 10GN, Sandy Super Black K, C, Sandy Super Gray B, Sandy Super Brown SB, FRL, RR, Sandy Super Nav Blue HRL, GLL, BL-H, GLL, BL-H FBB, Sandy Super Violet BL H / C, BL, BLN, Sandy Super Bordeaux FR, Sandy Sup r Pink FBL, F5B, Sandy Super Rubin FR, Sandy Super Carmine FB, Sandy Super Red FFG, RR, BS, Sandy Super Orange FL, R, BO, Sand G Sandy Yellow GG, F3R, IRC, FGN, GN, GN, GRS, GSR-130, GSN-130, GSN, 10GN (above, Sanyo Dye Co., Ltd.), Rio Fast Black Fx 8012 8313, 8169, Rio Fast Red Fx 8209, 8172, Rio Fast Red S Fx 8315, 8316, Rio Fast Blue Fx 8170, Rio Fast B ue Fx 8170, Rio Fast Blue S Fx 8312, Rio Fast Green S Fx 8314 (above, manufactured by Toyo Ink Co., Ltd.), EP-510 Black TR, EP-335 Black, EP-200 Red GY, EP-720 Red 2B EP-520 Blue 2B, EP-700 Blue GA, EP-510 Green B, EP-130 Yellow, EP-910 Yellow FR, EP-500 Orange R, EP-1500 Violet 3R, EP-65 White NKW-2101, 2102, 2103, 2104, 2105, 2106, 2107, 2108, 2108, 2117, 2127, 2137, 2167, 2101P, 2102 P, 2103P, 2104P, 2105P, 2106P, 2106P, 2107P, 2108P, 2117P, 2127P, 2137P, 2167P, NKW-3002, 3003, 3004, 3005, 3007, 3077 3008, 3402, 3404, 3405, 3407, 3408, 3408, 3477, 3602, 3603, 3604, 3605, 3607, 3707z, 3608, 3702, 3703, 3703 3704, 3705, 3777, 3708, 6013, 6038, 6559 (above, manufactured by Nippon Fluorescence Co., Ltd.), Sinloi Color Base SF-5000 Series (manufactured by Sinroihi), Cosmo Color S 1000F Series (Toyo Soda Co., Ltd.), Victoria Ero G-11, G-20, Victoria Orange G-16, G-21, Victoria Red G-19, G-22, Victoria Pink G-17, G-23, Victoria Green G-18, G -24, Victoria Blue G-15, G-25 (above, Gokoku Color Co., Ltd.), Pollux Blue PC5T-1020, Pollux Black PC8T-135, Pollux Thread IT-1030, etc. Pollux series (above, Sumika) Color Co., Ltd.) and the like, and these can be used alone or in combination of two or more.
[0011]
The resin emulsion is used to fix the handwriting on the cloth and particularly to impart washing resistance, and has a minimum film forming temperature of 25 ° C. or lower, preferably 0 ° C. or lower. Resin emulsions with a minimum film-forming temperature exceeding 25 ° C are hard and brittle, so they cannot follow the deformation and cracking of the cloth during washing, and the resin film breaks and detaches, reducing the concentration of handwriting. Is likely to occur.
As an example of a resin emulsion having a minimum film forming temperature of 25 ° C. or less, Primal AC-22 (minimum film-forming temperature: 8 ° C., solid content: 44.5% by weight), AC-33 (minimum film-forming temperature: 8 ° C., solid content: 46.5% by weight), AC-55 (Minimum film forming temperature: 5 ° C., solid content: 50.0 wt%), AC-64 (minimum film forming temperature: 7 ° C., solid content: 60.5 wt%), AC-261 (minimum film forming temperature) Temperature: 18 ° C., solid content: 50.0 wt%), AC-382 (minimum film forming temperature: 7 ° C., solid content: 50.0 wt%), AC-388 (minimum film forming temperature: 8 ° C.) , Solid content: 50.0 wt%), AC-417 (minimum film forming temperature: 20 ° C., solid content: 48.0 wt%), AC-490 (minimum film forming temperature: 18 ° C., solid content: 46.0% by weight), AC-507 (minimum film-forming temperature: 14 ° C., solid content: 46.5%), AC-630 (minimum film-forming temperature: 17 ° C., solid) : 50.0 wt%), AC-707 (minimum film-forming temperature: 7 ° C, solid content: 65.0 wt%), AC-3444 (minimum film-forming temperature: 12 ° C, solid content: 50.0) EC-1685 (minimum film-forming temperature: 0 ° C. or less, solid content: 63.0% by weight), EC-1791 (minimum film-forming temperature: 0 ° C. or less, solid content: 45.0% by weight) ), EC-1895 (minimum film-forming temperature: 0 ° C. or less, solid content: 61.0 wt%), EC-2218 (minimum film-forming temperature: 0 ° C. or less, solid content: 58.0 wt%), MV-1 (minimum film-forming temperature: 8 ° C., solid content: 46.0 wt%), MV-9 (minimum film-forming temperature: 10 ° C., solid content: 45.5 wt%), MV-17 (Minimum film-forming temperature: 8-12 ° C., solid content: 45.0% by weight), MV-23 (minimum film-forming temperature: 8 ° C., solid content: 43.0% by weight), E-32 (minimum film-forming temperature: 0 ° C. or less, solid content: 46.0% by weight), E-358 (minimum film-forming temperature: 8 ° C., solid content: 60.0% by weight), HA-8 (Minimum film forming temperature: 0 ° C. or less, solid content: 45.5% by weight), HA-12 (minimum film forming temperature: 5 ° C., solid content: 45.0% by weight), HA-24 (minimum film forming temperature) Film temperature: 0 ° C. or less, solid content: 44.5% by weight), K-3 (minimum film formation temperature: 0 ° C. or less, solid content: 46.0% by weight), K-87 (minimum film formation temperature) : 0 ° C. or lower, solid content: 46.0 wt%), TR-520 (minimum film forming temperature: 0 ° C. or lower, solid content: 50.0 wt%), TR-934HS (minimum film forming temperature: 0) ° C or lower, solid content: 47.5 wt%), experimental emulsion E-1345 (minimum film forming temperature: 0 ° C or lower, solid content: 45.5 wt%) (above, Acrylic resin emulsion such as Seum-and-Haas Japan Co., Ltd.), Sebian-A146 (minimum film-forming temperature: 20 ° C., solid content: 50% by weight), 150 (minimum film-forming temperature: 17 ° C., Solid content: 55% by weight (above, manufactured by Daicel Corporation), Polysol PS-19 (minimum film forming temperature: 0 ° C., solid content: 50% by weight), PS-3HA (minimum film forming temperature: 1 to 1%) 3 ° C., solid content: 50 ± 2% by weight) (above, Showa Polymer Co., Ltd.) and other vinyl acetate resin emulsions, Polysol PS-120 (minimum film-forming temperature: 3-5 ° C., solid content: 49. 5 ± 1.5 wt%), 747 L (minimum film forming temperature: 0 ° C., solid content: 50 wt%) (above, Showa Polymer Co., Ltd.), etc., vinyl acetate / acrylic copolymer resin emulsion, Polysol AP-2678 (minimum film forming temperature: 20 ° C., Solid content: 49% by weight), AP-2679 (minimum film forming temperature: 22 ° C., solid content: 49% by weight), AP-2694 (minimum film forming temperature: 9 ° C., solid content: 45% by weight), Examples thereof include styrene / acrylic copolymer resin emulsions such as AP-2697 (minimum film forming temperature: 0 ° C., solid content: 41% by weight) (above, Showa Polymer Co., Ltd.). . The said resin emulsion can be used 1 type or in mixture of 2 or more types. The amount used is preferably from 3 to 35% by weight based on the total amount of ink in terms of solid content because a sufficient effect on quality can be obtained.
[0012]
Xanthan gum is used to reduce bleeding when written on a cloth. The amount used is preferably 0.05 to 2.0% by weight based on the total amount of the ink because a sufficient quality effect can be obtained.
[0013]
Water is used as a solvent or a dispersion medium, and usually ion exchange water, distilled water or the like is used. The amount used is preferably 30 to 95% by weight based on the total amount of ink.
[0014]
The viscosity of the ink needs to be 100 to 30000 mPa · s (25 ° C.). When the viscosity is less than 100 mPa · s, there is a problem that blurring is increased when writing on the cloth. When the viscosity is more than 30000 mPa · s, there is a problem that ink cannot follow in time when ink is ejected, and as a result, writing cannot be performed.
[0015]
In addition to water essential as a solvent or dispersion medium, various water-soluble organic solvents can be used. These are various qualities as water-based inks, for example, prevention of ink drying at the nib and prevention of ink freezing at low temperatures. It is used for purposes such as pigment dispersion media. Specifically, glycols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-butylene glycol, dipropylene glycol, tripropylene glycol, polyethylene glycol, thiodiglycol, hexylene glycol, tetralin and glycerin. Ethylene glycol monomethyl ether, propylene glycol monomethyl ether, diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monoethyl ether, diethylene glycol monoethyl ether, dipropylene glycol monoethyl ether, ethylene glycol monobutyl ether , Propylene glycol Butyl ether, diethylene glycol monobutyl ether, dipropylene glycol monobutyl ether, triethylene glycol monomethyl ether, tripropylene glycol monomethyl ether, triethylene glycol monoethyl ether, tripropylene glycol monoethyl ether, triethylene glycol monobutyl ether, tripropylene glycol monobutyl ether, Ethylene glycol monomethyl ether acetate, dipropylene glycol monomethyl ether acetate, ethers such as ethylene glycol monophenyl ether, propylene glycol monophenyl ether, alcohols such as benzyl alcohol, methanol, ethanol, propanol, isopropanol, butanol, N-methyl 2-pyrrolidone, 2-pyrrolidone can be used, also these are those that can be used to select one or more.
[0016]
In addition, various additives such as preservatives, antifungal agents, rust preventives, antifoaming agents, dispersants, humectants, pH adjusters, and the like can be appropriately used according to the purpose and necessity.
[0017]
In producing the ink of the present invention, various conventionally known methods can be employed. For example, it can be easily obtained by mixing and dispersing using a stirrer such as a turbo mixer or a dispersing machine such as a ball mill, a sand grinder, a speed line mill, or a roll mill.
[0018]
Ink backflow prevention body is used to prevent ink leakage, backflow prevention, and drying, and is a non-volatile substance that is insoluble in water and water-soluble organic solvents in ink and has the ability to prevent ink permeation. Or it consists of a base material which is a hardly volatile substance.
Examples of the base material that is a non-volatile substance or a hardly volatile substance include polybutene, liquid paraffin, spindle oil, chlorinated paraffin, α-olefin oligomer, ethylene α-olefin, and silicone oil.
The viscosity of the ink backflow preventer is preferably 10,000 to 200,000 mPa · s (E-type viscometer, ST rotor, 1 rpm, 25 ° C.).
When the viscosity of the substrate alone is low, it is necessary to adjust the viscosity by using a thickener or a gelling agent in combination.
As thickeners and gelling agents, fine silica such as Aerosil (manufactured by Nippon Aerosil Co., Ltd.), hydrogenated castor oil type such as Disparon 305 (manufactured by Enomoto Kasei Co., Ltd.), Soroid (Sanki Co., Ltd.) And the like, and dextrin series such as Leo Pearl (manufactured by Chiba Flour Milling Co., Ltd.), metal soaps, bentonite and the like.
[0019]
[Action]
The ink of the ballpoint pen for cloth writing of the present invention uses xanthan gum and a resin emulsion having a minimum film forming temperature of 25 ° C. or less used for imparting washing resistance, so that the pigment can be used when writing on the cloth. It is held in xanthan gum, and the pigment is further discharged onto a cloth in a state where it is held in a resin emulsion having a minimum film forming temperature of 25 ° C. or lower. The pigment is presumed to suppress bleeding because it is instantaneously taken into the coating film of the resin emulsion in a state in which the penetration into the cloth is restricted, thereby forming a handwriting. Therefore, it is estimated that the bleed resistance is improved when writing on a fabric such as woven fabric or non-woven fabric.
[0020]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
Ink formulation example 1
EP-510 Black TR (black aqueous pigment base, manufactured by Dainichi Seika Kogyo Co., Ltd.) 15.0 parts by weight
Primal HA-8 (minimum film forming temperature 0 ° C. or less, solid content 45.5% by weight, acrylic resin emulsion, manufactured by Rohm and Haas Japan Co., Ltd.) 60.0 parts by weight
Kelzan AR (xanthan gum, manufactured by Sanki Co., Ltd.) 0.2 parts by weight
Sun eye bag P-100 (anti-mold agent, manufactured by Sanai Oil Co., Ltd.) 0.3 parts by weight
Thiodiglycol 15.0 parts by weight
9.5 parts by weight of ion exchange water
The above components were stirred and mixed to obtain a ballpoint pen ink for writing black cloth. The viscosity of this ink was 680 mPa · s (E-type viscometer ST rotor, 20 rpm, 25 ° C.).
[0021]
Ink formulation example 2
SANDY SUPER BLUE GLL (Blue aqueous pigment base, Sanyo Dye Co., Ltd.) 15.0 parts by weight
Primal K-3 (minimum film thickness 0 ° C. or less, solid content 46% by weight, acrylic resin emulsion, manufactured by Rohm and Haas Japan Co., Ltd.) 50.0 parts by weight
Kelzan AR (mentioned above) 0.1 parts by weight
Proxel GXL (Antidepressant, manufactured by Avidia) 0.2 parts by weight
15.0 parts by weight of ethylene glycol
Ion-exchanged water 19.7 parts by weight
The above components were mixed by stirring to obtain a ballpoint pen ink for blue cloth writing. The viscosity of this ink was 240 mPa · s (E-type viscometer ST rotor, 50 rpm, 25 ° C.).
[0023]
Ink formulation example 4
Fuji SP Yellow 4218 (Yellow aqueous pigment base, manufactured by Fuji Color Co., Ltd.) 10.0 parts by weight
Polysol PS-19 (minimum film-forming temperature 0 ° C. or less, solid content 50% by weight, vinyl acetate resin emulsion, Showa High Polymer Co., Ltd.) 25.0 parts by weight
Kelzan AR (xanthan gum, manufactured by Sanki Co., Ltd.) 0.3 parts by weight
Proxel GXL (Antidepressant, manufactured by Avidia) 0.2 parts by weight
Diethylene glycol 16.0 parts by weight
48.5 parts by weight of ion exchange water
The above ingredients were mixed with stirring to obtain a ballpoint pen ink for writing yellow cloth. The viscosity of this ink was 3000 mPa · s (E-type viscometer ST rotor, 20 rpm, 25 ° C.).
[0024]
Ink formulation example 5
Red FL2G Conc (red aqueous pigment base, manufactured by Dainichi Seika Kogyo Co., Ltd.) 15.0 parts by weight
Polysol AP-2678 (minimum film-forming temperature 20 ° C., solid content 49% by weight, styrene / acrylic copolymer resin emulsion, Showa Polymer Co., Ltd.) 45.0 parts by weight
Kelzan AR (mentioned above) 0.8 parts by weight
Mel Girl KM101A (mentioned above) 1.0 part by weight
15.0 parts by weight of ethylene glycol
Ion-exchanged water 23.2 parts by weight
The above components were stirred and mixed to obtain a ballpoint pen ink for writing black cloth. The viscosity of this ink was 21000 mPa · s (E-type viscometer ST rotor, 1 rpm, 25 ° C.).
[0025]
Ink formulation example 6
EP-510 Black TR (described above) 15.0 parts by weight
Polysol EVA. P-10 (minimum film-forming temperature 0 ° C., solid content 50% by weight, ethylene / vinyl acetate resin emulsion, manufactured by Showa Polymer Co., Ltd.) 45.0 parts by weight
Mel Girl KM101A (mentioned above) 1.0 part by weight
Thiodiglycol 15.0 parts by weight
Ion-exchanged water 24.0 parts by weight
The above components were stirred and mixed to obtain a ballpoint pen ink for writing black cloth. The viscosity of this ink was 10 mPa · s (B-type viscometer BL adapter, 30 rpm, 25 ° C.).
[0026]
Ink formulation example 7
SANDYE SUPER BLUE GLL (mentioned above) 15.0 parts by weight
Primal WL-81 (minimum film thickness 57 ° C., solid content 41.5% by weight, acrylic resin emulsion, manufactured by Rohm and Haas Japan Co., Ltd.) 50.0 parts by weight
Kelzan AR (mentioned above) 0.1 parts by weight
Proxel GXL (mentioned above) 0.2 parts by weight
15.0 parts by weight of ethylene glycol
Ion-exchanged water 19.7 parts by weight
The above components were mixed by stirring to obtain a ballpoint pen ink for blue cloth writing. The viscosity of this ink was 240 mPa · s (E-type viscometer ST rotor, 50 rpm, 25 ° C.).
[0027]
Ink formulation example 8
EP-510 Black TR (described above) 15.0 parts by weight
Mel Girl KM101A (mentioned above) 1.0 part by weight
Thiodiglycol 15.0 parts by weight
Ion-exchanged water 69.0 parts by weight
The above components were stirred and mixed to obtain a ballpoint pen ink for writing black cloth. The viscosity of this ink was 5 mPa · s (B-type viscometer BL adapter, 60 rpm, 25 ° C.).
[0028]
Ink backflow preventer
80 parts by weight of polybutene 3N (manufactured by NOF Corporation, polybutene)
Aerosil R972 (Nippon Aerosil Co., Ltd., fine particle silica) 20 parts by weight
The above components were mixed and stirred to obtain an ink backflow preventer.
[0029]
Ballpoint pen tip 1
A tip made of a tip made of an R-shaped curved surface having a radius of 0.05 mm and a ball made of tungsten carbide having a diameter of 0.7 mm was used.
[0030]
Ballpoint pen tip 2
A tip made of an R-shaped curved surface having a radius of 0.15 mm and a ball made of silicon carbide having a diameter of 0.7 mm was used as a caulking portion continuous with the most advanced fore edge portion.
[0031]
Ballpoint pen tip 3
A tip made of a tip made of an R-shaped curved surface and a tungsten carbide ball having a diameter of 0.7 mm was used.
[0032]
Ink storage tube
A transparent polypropylene cylinder having an inner diameter of 3.0 mm and a length of 125 mm was used.
[0033]
Examples 1 to 6 and Comparative Examples 1 to 3 were prepared in combinations shown in Table 1. In preparing the ballpoint pens of Examples 1 to 6 and Comparative Example 1, 0.8 g of each ink was filled in the ink containing tube, and further 0.1 g of the above ink backflow preventer was filled on the ink, followed by centrifugation. Processed.
[0034]
[Table 1]
[0035]
Example 1 to above 5 The bleedability test was conducted using Comparative Examples 1 to 3. At the same time, the smoothness of writing was also evaluated. The results are shown in Table 2.
[0036]
Smearability test: Examples 1 to 5 Using the samples of Comparative Examples 1 to 3, letters were written on a cotton broad (65% polyester, 35% cotton) cloth, and the handwriting was visually evaluated according to the following criteria.
[0037]
[Table 2]
[0038]
Smoothness of writing: Using each sample of Examples 1 to 6 and Comparative Example 1, letters were written on a cotton broad cloth, and the degree of catching on the cotton broad cloth at the time of writing was evaluated according to the following criteria.
[0039]
(Evaluation criteria)
A: There is no catch
○: Slightly caught
Δ: Slightly caught
×: Very catching
[0040]
[Table 2]
[0041]
【The invention's effect】
As described above in detail, the cloth writing ballpoint pen of the present invention has excellent bleeding resistance when written on a cloth such as a woven fabric or a non-woven fabric.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an example of a ballpoint pen for writing cloth.
FIG. 2 is an enlarged view of a main part of FIG.
[Explanation of symbols]
1 Ballpoint pen tip
2 balls
3 chips
4 Caulking part
5 Ink receiving tube
I ink
G Ink backflow preventer

Claims (2)

In the ink containing tube with a ballpoint pen tip attached to one end, pigment (except white pigment only) , resin emulsion with a minimum film-forming temperature of 25 ° C or less (excluding ethylene / vinyl acetate resin emulsion), xanthan gum, A ballpoint pen for writing, which is directly filled with an ink containing at least water and having a viscosity of 100 to 30,000 mPa · s (25 ° C.).   2. The ballpoint pen for writing cloth according to claim 1, wherein the resin emulsion is one or a mixture of two or more selected from acrylic resin, vinyl acetate resin, vinyl acetate / acrylic copolymer resin, and styrene / acrylic copolymer resin.