Recording paper

A recording paper and paper substrate technology, applied in magnetic recording, data recording, recording information storage, etc., can solve problems such as outflow of printed matter and leakage of confidential information, and achieve the effect of inhibiting the appearance of wrinkles and inhibiting transfer failure.

Active Publication Date: 2007-10-17
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there has been a problem that illegally duplicating or printing printed matter with highly confidential information leaks out, thereby leaking the confidential information.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] 90 parts by mass of LBKP (bleached kraft pulp of broad-leaved tree) (freeness (CSF)=400ml), 10 parts by mass of NBKP (bleached kraft pulp of coniferous tree) (freeness (CSF)=450ml) and 15 parts by mass of magnetic fiber (composition : Fe-Co-Si, length 30 mm, diameter 30 μm) were mixed to provide pulp slurry, and 0.7 parts by mass of polyacrylamide resin (trade name: PS3874-20, Arakawa Chemical Industry Co., Ltd. manufactured by the company). The resulting mixture was diluted with white water to prepare a papermaking stock slurry having a pH of 5.8 and a solid matter concentration of 0.4%.

[0104] Using an oriented sheet former (Oriented Sheet Former) (trade name; manufactured by Kumagai Riki Kogyo Co., Ltd.), the speed of the papermaking network is 1200m / min, and the injection pressure of the raw material slurry is 0.5kg / cm 2 Next, the papermaking raw material slurry is made into paper. Using a square plate press (manufactured by Kumagai Riki Kogyo Co., Ltd.), at 5kg...

Embodiment 2

[0106] 90 parts by mass of LBKP (freeness (CSF) = 400 ml) and 10 parts by mass of NBKP (freeness (CSF) = 450 ml) were mixed to give a pulp slurry, and 0.7 parts by mass of polypropylene used as a paper strengthening agent was added thereto Amide resin (trade name: PS3874-20, manufactured by Arakawa Chemical Industry Co., Ltd.). The resulting mixture was diluted with white water to prepare a first papermaking stock slurry having a pH of 5.8 and a solid matter concentration of 0.4%.

[0107] Using an oriented sheet former (trade name; manufactured by Kumagai Riki Kogyo Co., Ltd.), the papermaking wire speed is 1500m / min, and the raw material slurry injection pressure is 0.4kg / cm 2 The basis weight of the papermaking raw material slurry is 30g / m 2 The first paper substrate layer.

[0108] Next, using an oriented sheet former (trade name; manufactured by Kumagai Riki Kogyo Co., Ltd.), at a papermaking wire speed of 1500 m / min and a raw material slurry injection pressure of 0.4 k...

Embodiment 3

[0112] 90 parts by mass of LBKP (freeness (CSF) = 400 ml) and 10 parts by mass of NBKP (freeness (CSF) = 450 ml) were mixed to give a pulp slurry, and 0.7 parts by mass of polypropylene used as a paper strengthening agent was added thereto Amide resin (trade name: PS3874-20, manufactured by Arakawa Chemical Industry Co., Ltd.) and 6 parts by mass of precipitated calcium carbonate (TAMAPEARL TP-121, manufactured by Okutama Industry Co., Ltd.) used as a filler. The resulting mixture was diluted with white water to prepare a first papermaking stock slurry having a pH of 5.8 and a solid matter concentration of 0.4%.

[0113] Using an oriented sheet former (trade name; manufactured by Kumagai Riki Kogyo Co., Ltd.), the speed of the papermaking wire is 600m / min, and the injection pressure of the raw material slurry is 1.2kg / cm 2 The basis weight of the papermaking raw material slurry is 30g / m 2 The first paper substrate layer.

[0114] Next, using an oriented sheet former (trade n...

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Abstract

Disclosed is a recording paper containing pulp fibers and magnetic fibers, in which the fiber orientation ratio is within a range selected from the range from 1.8 to 3.0 and the range from 1.0 to 1.3 as measured by an ultrasonic wave velocity method.

Description

technical field [0001] The present invention relates to a recording paper containing magnetic fibers, on which printing can be performed using common recording materials such as toner or ink, and in which information can be recorded and reproduced by a magnetic method. Background technique [0002] For special documents such as banknotes and securities, it is extremely important to prevent them from being counterfeited. In order to prevent such special documents from being counterfeited, the following technology has been known so far, which includes introducing or embedding metal fibers made of magnetic fibers that can be detected by magnetic methods in special documents (for example, refer to JP-P10 -143708 bulletin, JP-A-7-32778 bulletin). [0003] On the other hand, with the popularization of computers, multifunctional machines and networks in recent years, it has become possible to quickly acquire desired information from a large amount of information and print or repro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/00D21H15/10D21H19/36
CPCG11B5/714H01F1/15316H01F41/16B41M5/0035H01F1/15308Y10T428/12465H01F1/0027G11B5/70621
Inventor 松田司栗原英三山口昭治高桥邦广布施真理雄时吉智文
Owner FUJIFILM BUSINESS INNOVATION CORP
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