WO2005118307A1 - 印刷用裏写り防止パウダー - Google Patents
印刷用裏写り防止パウダー Download PDFInfo
- Publication number
- WO2005118307A1 WO2005118307A1 PCT/JP2005/010248 JP2005010248W WO2005118307A1 WO 2005118307 A1 WO2005118307 A1 WO 2005118307A1 JP 2005010248 W JP2005010248 W JP 2005010248W WO 2005118307 A1 WO2005118307 A1 WO 2005118307A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- powder
- paper
- sprayed
- electrified
- show
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/02—Dusting, e.g. with an anti-offset powder for obtaining raised printing such as by thermogravure ; Varnishing
Definitions
- the present invention relates to show-through preventing powder in a printing press.
- the amount of the show-through preventing powder to be sprayed should be sufficient to uniformly cover the entire surface of the paper. In practice, however, spraying must be performed to prevent show-through, and the amount of powder must be sufficient to cover the entire surface of the paper. Can not get.
- Patent Document 1 discloses a technology related to a scattering prevention cover for preventing an excess blocking prevention powder from scattering inside and outside of a printing press in an offset sheet-fed press. It has been disclosed.
- Patent Document 2 Discloses a technique relating to a dust collecting device for a printing press, which aims to collect and reuse the powder sprayed excessively in the printing press.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-001497 ([0006] to [0007])
- Patent Document 2 JP-A-09-0557945 ([0007] to [0010])
- the cause of the necessity of spraying an excessive amount of powder is that the static electricity that charges the powder or the paper is a major factor.
- the nodule is charged by friction or the like while being pneumatically conveyed through the powder atomizer, while the surface of the printed paper may be charged unevenly.
- an electrostatic removing device or a humidifier may be provided.
- the static eliminator applies a high voltage to the electrodes to generate positive or negative ions, and electrically neutralizes the static electricity in the powder. The effect cannot be obtained without sufficient maintenance. And, since the applied voltage is high, there is a danger of fire, etc., and the management is not easy.
- Humidifiers must maintain high humidity in the entire room where the printing press is installed or in the entire printing press, making environmental management difficult.
- the show-through preventing powder is made by processing starchy substances such as corn starch and potato for the power S! /, And the particle size power is about 15 to 20 ⁇ m, about 20 to 30 ⁇ m, and about 30 to 30 ⁇ m. Often about 50 ⁇ m is used.
- the particle size and material of the powder are selected according to the type of paper, the type of ink, the specifications of the printing machine, the pattern to be printed, and the like. If this powder is evenly sprayed on the surface immediately before the paper discharged from the sheet-fed printing press is deposited, this powder will be present between the stacked paper and the show-through. Is prevented.
- the diameter of the tourmaline powder particles mixed with the show-through preventing powder is desirably substantially equal to the particle size of the show-through preventing powder.
- the mixing amount (content) is preferably 5 to 10% of the total weight of the show-through preventing powder.
- Tourmaline ore is a polar crystal, also called tourmaline, which has the characteristic of being spontaneously polarized without being placed in an electric field. Therefore, in the spraying process, when the powder is charged due to friction or the like while flowing, the charged powder is attracted to and contacts the tourmaline powder particles, and the charged charge is removed. If there is a charged portion on the surface of the paper, it is considered that the tourmaline powder particles are first attracted to the static electricity and come into contact with the static electricity, thereby removing the charge on the surface of the paper.
- the powder is sprayed in an uncharged state, and even if a part of the paper is charged, the charge is immediately removed by the tourmaline powder particles in the sprayed powder. As a result, the sprayed powder is evenly distributed on the paper surface without bias.
- the content of tourmaline powder particles in the show-through preventing powder for printing be 5% or more.
- a content of about 10% is sufficient for the antistatic effect.
- Additional of more than this not only raises the cost of the show-through prevention powder but also makes the setting of the spraying equipment necessary because the powder becomes heavy. become.
Landscapes
- Printing Methods (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-165640 | 2004-06-03 | ||
JP2004165640A JP2005343024A (ja) | 2004-06-03 | 2004-06-03 | 印刷用裏写り防止パウダー |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005118307A1 true WO2005118307A1 (ja) | 2005-12-15 |
Family
ID=35462807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/010248 WO2005118307A1 (ja) | 2004-06-03 | 2005-06-03 | 印刷用裏写り防止パウダー |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2005343024A (ja) |
WO (1) | WO2005118307A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5499702U (ja) * | 1977-12-22 | 1979-07-13 | ||
JPH10130621A (ja) * | 1996-10-30 | 1998-05-19 | J P M:Kk | 粉体及びその製造方法 |
JP2000202992A (ja) * | 1999-01-18 | 2000-07-25 | Cosmo Tec:Kk | 印刷用パウダ散布装置 |
JP2003105253A (ja) * | 2001-09-28 | 2003-04-09 | Asahi Glass Co Ltd | フッ素樹脂系塗料組成物 |
-
2004
- 2004-06-03 JP JP2004165640A patent/JP2005343024A/ja active Pending
-
2005
- 2005-06-03 WO PCT/JP2005/010248 patent/WO2005118307A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5499702U (ja) * | 1977-12-22 | 1979-07-13 | ||
JPH10130621A (ja) * | 1996-10-30 | 1998-05-19 | J P M:Kk | 粉体及びその製造方法 |
JP2000202992A (ja) * | 1999-01-18 | 2000-07-25 | Cosmo Tec:Kk | 印刷用パウダ散布装置 |
JP2003105253A (ja) * | 2001-09-28 | 2003-04-09 | Asahi Glass Co Ltd | フッ素樹脂系塗料組成物 |
Also Published As
Publication number | Publication date |
---|---|
JP2005343024A (ja) | 2005-12-15 |
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