Recording paper

A technology for recording paper and paper base material, which can be used in electrical recording, paper, papermaking, etc., to solve the problems of separation of printed matter and leakage of confidential information, and achieve the effect of easy papermaking and inhibition of temporary deterioration.

Active Publication Date: 2008-09-17
FUJIFILM BUSINESS INNOVATION CORP
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Problems solved by technology

As a result, the issue that confidential information is leaked due to the illegal copying or printing of prin...

Method used

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Embodiment

[0138] Hereinafter, the present invention will be described more specifically with reference to Examples, but of course, the scope of the present invention is not limited to the following Examples.

[0139] (production of recording paper A series)

[0140] A paper slurry having a solids concentration of 0.4% by mass comprising 90 parts by mass of LBKP (freeness (CSF) = 450 ml) and 10 parts by mass of NBKP (freeness (CSF) = 450 ml) was prepared.

[0141] Using an oriented sheet former (trade name: ORIENTED SHEET FORMER, manufactured by Kumagai Riki Kogyo Co., Ltd.), various variations of the pulp web obtained by combining the wire speed and the pulp discharge pressure as shown in Table 1 Under the condition of the speed ratio, the paper pulp is made into paper with a basis weight of 40g / m 2 Sheet.

[0142] Then, 10 magnetic fibers (composition: Fe-Co-Si, length 30 mm, diameter 35 μm) with a large Buckmillson effect were arranged between two sheets prepared with the same pulp-...

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Abstract

A recording paper contains a pulp fiber and a magnetic fiber having a large Barkhausen effect. The fiber orientation ratio of this recording paper by an ultrasonic propagation velocity method is in a range of more than 1.3 to less than 1.8, and the degree of shrinkage in an MD thereof is 0.25% or less.

Description

technical field [0001] The present invention relates to a recording paper on which printing can be performed by common recording materials such as toner and ink, and which contains a magnetic material for emitting a signal detectable by a detection device. Background technique [0002] Security against counterfeiting is extremely important in special documents such as banknotes and securities. In order to prevent these special documents from being forged, it has been known in the past to penetrate and embed metal fibers made of magnetic materials that can be detected by magnetic detectors in special documents (Japanese Patent Laying-Open Publication No. 10-143708 and Patent Laid-Open Publication No. 7-32778). [0003] On the other hand, the popularization of computers, multifunction machines, and networks in recent years has made it easy to acquire desired information from a large amount of information, and to print and copy the acquired information. As a result, a problem...

Claims

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Application Information

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IPC IPC(8): D21H21/42D21H27/34B32B29/02
CPCD21H13/48Y10T428/31982Y10T428/253Y10T428/256D21H27/30Y10S428/90B41M5/0035G03G7/0066
Inventor 松田司栗原英三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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