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Transfer paper for electrophotography

A technology for electrophotography and transfer paper, applied in the directions of paper, papermaking, and papermaking machines, etc., can solve problems such as leakage of confidential information, achieve excellent images, and suppress the decline of detection accuracy.

Active Publication Date: 2008-09-17
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, taking away printed matter obtained by illegally copying or printing confidential information has caused a serious problem of leakage of confidential information.

Method used

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  • Transfer paper for electrophotography
  • Transfer paper for electrophotography
  • Transfer paper for electrophotography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0199] Paper slurry comprises 95 parts by mass of LBKP (bleached tree bleached kraft pulp) and 5 parts by mass of NBKP (bleached kraft pulp of coniferous tree), with respect to the pulp solid content of 100 parts by mass, 0.15 parts by mass of cationized starch (commercial product Name: MS4600, manufactured by Nippon Food Chemical Industry Co., Ltd.) and 0.1 part by mass of alkenyl succinic anhydride (trade name: Fiveran 81, manufactured by NipponNSC Ltd.).

[0200] Subsequently, 45 parts by mass of glycerin (purified glycerin, manufactured by Kao Corporation) as a humectant and 5 magnetic body wires (composition: Fe system) with a diameter of 20 μm and a length of 40 mm were further mixed with the paper slurry.

[0201] The thus obtained paper slurry (solid content concentration: 1.0% by mass) was paper-made using an orientation paper machine (manufactured by Kumagai Riki Kogyo Co., Ltd.) under the following conditions to produce a paper sheet.

[0202]

[0203] Drum rotati...

Embodiment 2

[0208] Paper was produced in the same manner as in Example 1 except that the amount of glycerin in the used paper slurry was changed to 5 parts by weight. The resulting paper had a basis weight of 68 g / m 2 . The detailed properties of the paper are shown in Table 1.

Embodiment 3

[0210] Two-page sheets not containing the magnetic material were produced respectively in the same manner as in Example 1, except that the pulp slurry also prepared in the same manner as in Example 1 did not contain a humectant and a magnetic material, and The number of round trips of the papermaking conditions in Example 1 was changed to four. The basis weight of the sheet is 31g / m 2 (hereinafter, this sheet is referred to as "sheet A3") and 32 g / m 2 (Hereafter, this sheet is referred to as "sheet C3").

[0211] Subsequently, in the same manner as in Example 1, a compound with a basis weight of 31 g / m was produced. 2 (hereinafter, this sheet is referred to as "sheet B4"), except that the pulp slurry prepared in the same manner as in Example 1 does not contain a humectant, and the The number of round trips of the papermaking conditions was changed to four times.

[0212] The obtained three-page sheets were respectively pressed on a press machine (manufactured by Kumagai Ri...

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Abstract

A transfer paper for electrophotography contains a pulp fiber and a magnetic material for generating a large Barkhausen effect. An average dehydration speed S 1 a (an average value (% by mass / second) of dehydration speeds S 1 of 5 sheets of paper) is 0.15 or less. The dehydration speed S 1 is represented by (W 1 a-W 1 b) / 30. Here, W 1 a represents a moisture content ratio (% by mass) of the paper after moisture conditioning, and W 1 b represents a moisture content ratio (% by mass) of the paper after a dehydration process including leaving the paper in a 80 DEG C. environment for 30 seconds after moisture conditioning.

Description

technical field [0001] The present invention relates to transfer paper for electrophotography, which is used for printing operations with commonly used recording materials such as toner and ink, and which contains signal magnetic material. Background technique [0002] Anti-counterfeiting in special documents such as banknotes and securities is of paramount importance. In order to prevent such special documents from being forged, it has been known so far to put or embed metal fibers made of magnetic materials etc. that can be detected by a magnetic signal detector in special documents (Japanese Patent Application Laid-Open No. 10-143708 Gazette and JP-A-7-32778 Gazette). [0003] On the other hand, the spread of computers, compound machines, and computer networks makes it easy to acquire desired information from a large amount of information, and to print or copy the acquired information. Therefore, taking away printed matter obtained by illegally copying or printing conf...

Claims

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Application Information

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IPC IPC(8): D21H21/40D21F5/00D21H21/42D21H27/20D21H27/30
CPCG03G7/0053D21H17/67D21H21/14G03G7/0046D21H27/30
Inventor 栗原英三松田司布施真理雄山口昭治高桥邦广时吉智文
Owner FUJIFILM BUSINESS INNOVATION CORP
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