JP5214342B2 - Printer paper - Google Patents

Description

  The present invention relates to printer paper having excellent transportability during printing, and can be applied as, for example, heavy printer paper such as tack paper.

PPC (Plain Paper Copy) paper that is used in electrophotographic printers, and that is transported one by one from the state of being stacked by the transport rollers of the printer and printed on each sheet (cut paper) Is produced by adjusting the coefficient of friction between the sheets in order to stabilize the conveyance of the sheets and prevent conveyance errors. As a general PPC sheet, a light sheet having a weight of about 64 g / m ² is used, and therefore, the allowable range of the coefficient of friction between the sheets is wide.

  However, a printer paper in which information recording paper is pseudo-adhered on tack paper or tack paper has a multi-layer structure and further has a large amount of weight due to the presence of adhesives, pseudo-adhesives, and the like between layers. Heavy printer paper has a large frictional force between the printer papers, and the frictional force between the transport roller and the printer paper cannot pull the paper sufficiently and is likely to cause non-feed. It was.

Therefore, if the friction coefficient between the printer papers is reduced to reduce the frictional force between the printer papers, the force required to pull the printer paper will be reduced, but the friction coefficient between the transport roller and the printer paper will also be reduced. Printer paper is not fed. A friction coefficient between printer sheets is small, and a surface treatment agent that can increase the coefficient of friction between the printer sheet and the transport roller is suitable, but not general.
JP 2001-171264 A

  Accordingly, a main problem to be solved by the present invention is to provide a printer paper that improves the transportability during printing and does not impair the transportability even if the weight is heavy.

<Printer paper according to claim 1>
A printer paper having a weight of more than 64 g / m ² that is transported one by one from a state where a plurality of sheets are stacked by a transport roller of the printer, and printed on each sheet by the printer,
On at least one surface, a roller receiving portion that contacts the transport roller and a friction reduction processing region that is an area excluding this roller receiving portion are provided.
The friction reduction treatment region is provided by applying a friction coefficient reducing agent mainly composed of a lubricant and an adhesive,
A printer paper, characterized in that a static friction coefficient measured in accordance with JIS P 8147 horizontal method in a friction reduction treatment region is formed to be lower than the static friction coefficient of a roller receiving portion .

(Function and effect)
In general, low static friction coefficient between the printers paper, it is important to stabilize the sheet conveying static friction coefficient of the roller receiving portion of the transport roller and the paper is high.
As in the printer paper according to claim 1, the friction reduction processing area, which is an area excluding the roller receiving portion, is larger than the static friction coefficient measured according to the horizontal method of JIS P 8147 of the roller receiving portion with which the conveying roller contacts. Since the static friction coefficient measured according to the JIS P 8147 horizontal method is low, the force for pulling the printer paper with the transport roller is large, and the friction force generated between the printer papers can be reduced. Even if the amount of paper on the printer paper is heavy, stable transportability can be obtained. Further, in the printer paper according to the present invention, it is possible to provide a printer paper with more excellent transportability by forming a friction reduction processing region on both sides.

<Printer paper according to claim 2>
Roller receiving portion, said has a roller receiving portion from a portion of one of the peripheral surface having formed in a straight line up to the part of the other peripheral edge opposed thereto, printer paper of claim 1, wherein.

(Function and effect)
In a general printer, the transport roller comes into first contact with the periphery of the printer paper and the vicinity thereof. In consideration of such a fact, in the present claims, the roller receiving portion is formed so as to include a part of the peripheral edge of the surface having the roller receiving portion. By arranging the roller receiving portion in this way, the same effect as that of the printer paper according to claim 1 can be obtained, and the conveyance roller is first brought into contact with the roller receiving portion during conveyance, so that the conveyance is reliably performed. It becomes like this.

<Printer paper according to claim 2 >
Roller receiving portion, said has a roller receiving portion from a portion of one of the peripheral surface having formed in a straight line up to the part of the other peripheral edge opposed thereto, printer paper of claim 1, wherein.

(Function and effect)
The printer paper according to this claim has the same effect as the printer paper according to claim 1 . Further, by forming the roller receiving portion linearly from a portion of one of the peripheral surface with a roller receiving portion up to the part of the other peripheral edge opposed thereto, the conveying roller friction reducing treatment area during transport Therefore, more reliable conveyance is possible.

<Printer paper according to claim 3>
The printer paper according to claim 1, wherein the roller receiving portion is a region subjected to high friction processing.

(Function and effect)
The printer paper according to this claim has the same effect as the printer paper according to claim 1. Furthermore, by setting the roller receiving portion to a region subjected to high friction processing, it is possible to prevent the transfer roller from slipping on the roller receiving portion during transport, and as a result, transportability is improved.

  As described above, according to the above-described configuration of the present invention, it is possible to provide a printer paper that improves the transportability at the time of printing and does not impair the transportability even if the amount of paper is heavy.

Next, a first embodiment of the printer paper according to the present invention is shown in FIGS. 1 and 2, and the present embodiment will be described in detail based on these drawings.
The printer paper 1 according to the present embodiment shown in FIGS. 1 and 2 is conveyed one by one from a state where a plurality of sheets are stacked by a conveyance roller of the printer, and is so-called printed by the printer one by one. Cut paper.

  As shown in FIGS. 1 and 2, on one side of the base paper 10 formed in a rectangular shape that is the base paper of the printer paper 1, a linear roller receiving portion 11 extends in the longitudinal direction of the base paper 10. The roller receiving portions 11 are arranged so as to be parallel, and the lateral width W1 is uniform from the central portion on one short side of the base paper 10 to the central portion on the other short side of the base paper 10. So as to extend.

  In a region other than the roller receiving portion 11 in the base paper 10, a friction reduction processing region 12 is arranged so as to sandwich each roller receiving portion 11. On this friction reduction processing region 12, a friction coefficient reducing layer 20 is laminated by applying a friction coefficient reducing agent mainly composed of at least a lubricant and an adhesive. By the presence of the friction coefficient reducing layer 20, the static friction coefficient measured according to the JIS P 8147 horizontal method in the friction reduction processing region 12 is measured according to the JIS P 8147 horizontal method in the roller receiving portion 11. The coefficient of static friction is lower.

  The arrangement of the roller receiver 11 is appropriately changed depending on the position where the conveyance roller of the printer and the printer paper 1 are in contact during printing. In the form shown in FIGS. 1 and 2, the base paper 10 is arranged at the center in the lateral direction along the longitudinal direction, but may be arranged so as to intersect with the longitudinal direction of the base paper 10, for example. In short, it is only necessary that the portion of the base paper 10 that comes into contact with the conveyance roller of the printer on which the printing is performed is the roller receiver 11. In other words, the friction reduction processing region 12 is arranged so as not to contact the conveyance roller of the printer during printing.

  Friction coefficient reducing agents include paraffin wax, polyethylene wax, ester lubricants, fatty acid amide lubricants, fatty acid alcohol lubricants, silicone resin lubricants, natural waxes, etc. by applying the surface friction coefficient to the printer paper surface. There is no particular limitation as long as it can be lowered, and the amount of blending is not particularly limited as long as it is a blending amount that has a lubricant effect and does not easily fall off from the printer paper with respect to the adhesive component. Of these, UV effect resin inks containing a silicone resin are particularly preferred for reasons of workability and good handling.

  The friction coefficient reducing agent can be applied by a known coating and printing method. For example, various coating methods such as a gravure coater, a rod coater, a blade coater, a die coater, and an air knife coater, gravure printing, and offset printing. It can be applied by printing methods such as letterpress printing and stencil printing.

  As the application pattern of the friction coefficient reducing agent, various patterns such as a solid pattern, a halftone dot pattern, and a tint block pattern are applicable. However, when a friction coefficient reducing agent having high releasability is applied to the printing ink resin or toner resin, it is most preferable to apply at halftone dots because the fixability of the ink and toner is lowered. Also, by applying a pattern such as a halftone dot, the friction coefficient can be easily adjusted.

  As a method for improving the fixability of the toner to the friction coefficient reducing layer 20 formed with the above friction coefficient reducing agent, a component similar to the composition of the resin component contained in the toner used for printing is used. A method of blending into is proposed. For example, if the toner contains a styrene resin, the styrene resin is also added to the friction coefficient reducing agent. As described above, when a component similar to the composition of the resin component contained in the toner is blended in the friction coefficient reducing agent, it is preferable that the blending amount is such that the friction coefficient reducing function of the friction coefficient reducing agent is not hindered. Is preferably 0.5 to 5% by weight. When the blending amount is about this level, the friction coefficient reducing function of the friction coefficient reducing agent is not hindered, and a suitable toner fixing property can be obtained.

In the present embodiment, the base paper 10 is not particularly limited. For example, PPC paper, heavy tack paper, pseudo-adhesive paper having a pseudo-adhesive layer, or the like can be used as the base paper 10. However, in general electrophotographic printer designs, the maximum amount of paper is about 157 g / m ^2, so the maximum amount after application of the friction coefficient reducing agent is 157 g / It is preferable to produce m ² as the upper limit.

The static friction coefficient of the roller receiving portion 11 measured according to the horizontal method of JIS P 8147 is μ ₁ , the static friction coefficient of the friction reduction treatment region 12 measured according to the horizontal method of JIS P 8147 is μ _2, and printer paper S ₁ is the contact area between the roller receiver 11 and the transport roller of the printer during transport ₁ , and S _{2 is} the area of the roller receiver 11 on one surface, and S _{3 is} the area of the friction reduction processing region 12 on one surface. Then, the printer paper 1 according to the present embodiment is manufactured so as to satisfy the expression (1).

S ₁ × μ ₁ > S ₂ × μ ₁ + S ₃ × μ ₂ (1)

  In the embodiment shown using FIGS. 1 and 2, the friction coefficient reducing layer 20 is formed on one side of the base paper 10, but the friction coefficient reducing layer 20 may be formed on both sides of the base paper 10. good. However, when using the base paper 10 having a relatively light weight, the extra cost can be suppressed by forming the friction coefficient reducing layer 20 only on one side.

  In order to increase the static friction coefficient measured according to the JIS P 8147 horizontal method in the roller receiver 11 in order to improve the transportability, the roller receiver 11 may be a region subjected to high friction processing. The high friction treatment of the roller receiving portion 11 is performed by applying a friction coefficient improver mainly composed of an inorganic pigment. Examples of inorganic pigments contained in the friction coefficient improver include natural or synthetic inorganic pigments such as kaolin, calcined kaolin, various light calcium carbonates, ground heavy calcium carbonate, talc, synthetic silica, titanium dioxide, and aluminum hydroxide. One or more of these can be appropriately selected and used. Among these, calcium carbonate and calcined kaolin are preferable from the viewpoint of excellent friction coefficient improvement effect and price.

  The friction coefficient improver mainly composed of inorganic pigment can be applied by a known coating method or printing method. For example, various coatings such as a gravure coater, a rod coater, a blade coater, a die coater, and an air knife coater. It can apply | coat by printing methods, such as a construction method, gravure printing, offset printing, letterpress printing, and stencil printing.

  As the application pattern of the friction coefficient improver, various patterns such as a solid pattern, a halftone dot pattern, and a background pattern can be applied. Among these, a halftone dot is preferable because the frictional resistance can be easily controlled by changing the area ratio.

Next, the operation of the printer paper 1 according to this embodiment will be described.
The static friction coefficient measured in accordance with the horizontal method of JIS P 8147 by forming the friction coefficient reducing layer 20 in the friction reduction processing region 12 excluding the roller receiving portion 11 is JIS P 8147 of the roller receiving portion 11. By forming so as to be lower than the static friction coefficient measured according to the horizontal method, the force to pull the printer paper 1 by the transport roller is large, and the frictional force generated between the stacked printer papers 1 can be reduced. Even if the weight of the printer paper 1 is heavy, stable transportability can be obtained.

  Moreover, since the part which the conveyance roller of a printer contacts is made into the roller receiving part 11, a conveyance roller does not contact the friction reduction process area | region 12 at the time of conveyance, and more reliable conveyance is attained.

Next, a second embodiment of the printer paper according to the present invention is shown in FIG. 3, and the present embodiment will be described based on this drawing. In addition, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Embodiment, and the duplicate description is abbreviate | omitted.
In the above embodiment, the roller receiver 11 is arranged so as to extend from the central portion on one short side of the base paper 10 to the central portion on the other short side as shown in FIG. As shown in FIG. 3, the base paper 10 may be disposed only in the vicinity of the central portion on one short side. In this case, the roller receiving portion 11 is a portion that first comes into contact with the conveyance roller during conveyance by the printer.

  When the roller receiver 11 is disposed at a portion where the roller receiver 11 first comes into contact with the transport roller during transport by the printer, the arrangement of the roller receiver 11 is appropriately changed depending on the position of the transport roller in the printer to be used. In the form shown in FIG. 3, the base paper 10 is disposed only in the vicinity of the central portion on one short side, but may be disposed in the vicinity of the central portion on the long side of the base paper 10, for example. In short, it is only necessary that the portion of the base paper 10 that first contacts the transport roller of the printer on which printing is performed is the roller receiver 11.

  EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

  Using the printer paper shown in Examples 1 to 12 and Comparative Examples 1 to 4, RICHO imago Neo Neo 602 (Printer 1 in Table 1), RICHO imago Neo Neo 450 (Printer 2 in Table 1), and NEC PR- The number of non-feeds and double feeds when 1000 sheets of printer paper were passed through three types of printers of L2350 (printer 3 in Table 1) was counted, and the transportability was evaluated based on the total number of troubles.

The “transportability evaluation” is an evaluation as shown below.
A: Total number of troubles 0 to 1 B: Total number of troubles 2 to 5 times C: Total number of troubles 6 to 10 times D: Total number of troubles 11 times or more

  High quality paper was used as the base paper in the printer paper of Examples 1 to 12 and Comparative Examples 1 to 4, and the layer structure was a single layer or multiple layers. The friction reduction processing region and the roller receiving portion in Examples 1 to 12 are arranged on one side (back side) similarly to the first embodiment shown in FIGS. 1 and 2, and the coefficient of friction is adjusted on the surface. Not given. In the friction reduction regions in Examples 1 to 8, a low friction treatment was performed by applying an ultraviolet curable resin blended with a friction coefficient reducing agent composed of a silicone-based lubricant in a dot pattern by a resin relief printing method. In the roller receivers in Examples 1 to 4 and Examples 9 to 12, an ultraviolet curable resin containing a friction coefficient improver made of titanium dioxide was applied in a halftone dot pattern by a resin letterpress printing method and subjected to high friction treatment. did. The printer paper of Comparative Examples 1 to 4 was not subjected to friction coefficient adjustment processing on both sides.

In Table 1, the US basis weight is measured according to JIS P 8124, the paper thickness is measured according to JIS P 8118, and the friction coefficient is measured according to the horizontal method of JIS P 8147. In Table 1, “surface-surface” indicates the friction coefficient between the surfaces, “surface-back surface friction reduction treatment region” indicates the friction coefficient between the front surface and back surface friction reduction treatment region, and “front-back roller”. “Receiver” indicates the coefficient of friction between the front and back roller receivers.

FIG. 3 is a plan view of the printer paper according to the first embodiment of the present invention. It is AA sectional drawing of FIG. It is a top view of the printer paper which concerns on the 2nd Embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 Printer paper 10 Base material 11 Roller receiving part 12 Friction reduction process area 20 Friction coefficient reduction layer

Claims (3)

A printer paper having a weight of more than 64 g / m ² that is transported one by one from a state where a plurality of sheets are stacked by a transport roller of the printer, and printed on each sheet by the printer,
On at least one surface, a roller receiving portion that contacts the transport roller and a friction reduction processing region that is an area excluding this roller receiving portion are provided.
The friction reduction treatment region is provided by applying a friction coefficient reducing agent mainly composed of a lubricant and an adhesive,
A printer paper, characterized in that a static friction coefficient measured in accordance with JIS P 8147 horizontal method in a friction reduction treatment region is formed to be lower than the static friction coefficient of a roller receiving portion . Roller receiving portion, said has a roller receiving portion from a portion of one of the peripheral surface having formed in a straight line up to the part of the other peripheral edge opposed thereto, printer paper of claim 1, wherein. The printer paper according to claim 1 , wherein the roller receiving portion is a region subjected to high friction processing.

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