JPH06301229A - Label image-receiving body for toner transfer recording - Google Patents

Abstract

PURPOSE:To form a sharp and excellent full-color picture image by specifying the surface reflection characteristics of the base material of a label body and surface reflection characteristics after respective layers are formed. CONSTITUTION:The label base 2 of the label image-receiving body 1 is coated with an antistatic layer 4 on one surface, and the other surface thereof is coated with an adhesive layer 9. One side surface of a sparator base 5 of a separator 11 is coated with a peeling layer 6, while the other surface is coated with an antistatic layer 8. Further, the peeling layer 6 of the separator 11 is stuck to the adhesive layer 9 of the label image-receiving body 1 to be temporarily stuck. The base bodies 2, 5 of the label body and the separator 11, respectively, are made of synthetic resin films. Each of base bodies 2, 5 has 10<6>-10<13>OMEGA/square surface resistance on one surface, and the surface reflection characteristics measured by the method according to JIS Z 8722 and described according to JIS Z 8730, L>=90, a=-2.0 to 2.0, and b=-5.0 to 1.8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive label image receptor used in a printing device by electrostatic transfer of toner.

[0002]

2. Description of the Related Art In recent years, various printing apparatuses using electrostatic transfer of toner have been used. In these printing methods, the toner image formed on the photosensitive drum is transferred from the photosensitive drum by the electrostatic attraction force of the charged paper, and is thermally fixed by the fixing roll. The color of the obtained image includes a monochrome image using only black toner, and a full-color image in which toners of three colors of yellow, magenta, and cyan or four colors of black added thereto are sequentially transferred. The image obtained in this manner has a higher definition due to the atomization of the toner and the improvement of the photosensitive drum, and there is also an image having a high image quality of 400 DPI. As recording paper used for such electrostatic transfer, there are labels and stickers in addition to general-purpose paper, and a monochrome or full-color image comparable to conventional photographic printing is obtained.

As a base material for such a label, there is a paper base material or a film base material. Of these, when a film base material is used and an image is obtained as a reflection image, the toner adhesion is lower and static charge is more frequently than when a paper base material is used. Therefore, various resins and a charge control layer for providing toner adhesion are coated on the surface of the base material.

[0004]

As a base material for such a label paper, a PET film mixed with a white filler or a PET foamed inside is used, on which a matte ink layer or an antistatic treatment is applied. Layers are provided. Therefore, even if the whiteness of the base material or the matte ink layer is high, if the antistatic treatment layer provided thereon is colored, the whiteness of the label paper surface is low and the obtained color image is also Lack of clarity. On the contrary, even when the material to be coated has little coloring, if the whiteness of the substrate itself is low, the whiteness as a label becomes low, and the obtained color image also lacks sharpness.

An object of the present invention is to provide a label image receptor for toner transfer recording capable of forming a clear and excellent full color image.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies in order to solve the above-mentioned problems, and as a result, specified the surface reflection characteristics of the base material of the label body and further coated each layer. The inventors have found that a label image receptor for toner transfer recording capable of forming a clear image can be obtained by defining the surface reflection characteristics after the completion of the invention, and completed the present invention.

That is, a label image receiving body used in a printing apparatus by electrostatic transfer of toner, comprising a label body having an adhesive and a separator releasably adhered to the label body, and the label body and the base material of the separator. Are both synthetic resin films, one surface of each substrate has a surface resistance of 10 ⁶ to 10 ¹³ Ω / □, and the surface reflection characteristics of the label are measured by the method specified in JIS Z8722, J
When displayed by the method specified by ISZ8730, L is 90 or more, a is -2.0 to 2.0, and b is -5.0 to 1.
No. 8 is provided, and a label image receiver for toner transfer recording is provided.

The present invention will now be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing a specific example of the toner image recording / recording label receiver of the present invention. Label substrate 2 of label receiver 1
Is provided with an antistatic treatment layer 4, and an adhesive layer 9 is provided on the opposite surface. On the other hand, the release layer 6 is provided on one surface of the separator substrate 5 of the separator 11, and the antistatic treatment layer 8 is provided on the opposite surface. Separator 11
The surface of the peeling layer 6 is attached to the adhesive layer 9 of the label image receptor 1 and is temporarily attached.

As the base material 3 and the base material 5 of the label body and the separator, polymer films of polyester, polyethylene, polypropylene, polystyrene, polycarbonate, or the like, or additives such as fillers and softening agents are added to these base materials. A film, a laminate of these, a foam of these, or the like can be used. The thickness of the base material is not particularly limited, but is preferably 10 to 150 μm.

The antistatic treatment layers 4 and 8 of the label body and the separator can be formed by applying various surfactants or tin oxide fine powder dispersed in a thermoplastic resin. When the tin oxide fine powder is used, the particle size thereof is 1 μm or less, preferably 0.005-0.5 μm, and it is particularly preferable to use the fine powder doped with phosphorus, antimony or the like. As the thermoplastic resin, a polyester resin, a butyral resin, an ethylene vinyl acetate copolymer, or another thermoplastic resin having excellent adhesiveness and transparency is preferable. The thickness of the antistatic treatment layer 4 is preferably 0.1 to 5.0 μm.

Since the antistatic treatment layer is the outermost surface of the above label body, when the binder resin or the tin oxide fine powder to which the doping is applied is colored, the whiteness of the label surface is lowered and an image is formed. When it is done, the sharpness is impaired. For example, when the value of a becomes -2.0 or less, the label surface becomes green, and when it exceeds +2.0, it becomes reddish. Further, when the value of b exceeds +1.0, it becomes yellowish, and when the value of b falls below -5.0, it becomes bluish. If the value of L is less than 85, the image will appear dark and the sharpness will be impaired. Therefore, when the antistatic treatment layer is made of a colored material, there is a method of adjusting the coating thickness to a level where coloring is not a problem or improving whiteness by mixing a fluorescent whitening agent or a white pigment. It is taken.

If necessary, a filler such as fine silica powder may be added to the antistatic treatment layer 4, whereby the anchor effect of the toner is increased and the adhesion is improved. The particle size of such fine powder is usually 0.2 to 10 μm.
m, preferably 2 to 8 μm. The blending amount of these fillers is 0.5 to 30% by weight as solid content, preferably 5 to 30% by weight.
It is 20% by weight.

It is preferable to control the surface specific resistance of the surface of the label body and the separator to 10 ⁶ to 10 ¹³ Ω / □ by providing the antistatic treatment layer. The surface resistivity of both surfaces may be set to the same value or different values, and the optimum value is set according to the printing machine. The surface resistivity can be controlled by the particle size of tin oxide, the degree of doping, and the coating thickness.

For the adhesive layer 9 provided on the back surface of the label body, a rubber or acrylic adhesive can be used. The coating thickness of the adhesive layer is 5 to 30 μm, preferably 10
Is about 20 μm. If the thickness of the pressure-sensitive adhesive layer is larger than this, the pressure-sensitive adhesive may stick out from the end surface of the image receptor and contaminate the inside of the printing machine. It is also possible to control the peeling force from the separator by adjusting the coating thickness.

The release layer 6 provided on one surface of the separator substrate 5 can be formed by applying a usual ultraviolet curable silicone resin or thermosetting silicone resin. The coating thickness of these is usually 0.05 to 0.5 μm.

Further, various anchor coat layers may be provided between each of the above layers and the substrate in order to improve the adhesion between them. Further, in order to easily distinguish the label side and the separator side, a part or the whole surface of both sides of the separator may be colored.

FIG. 2 is a sectional view showing another embodiment of the present invention. When a transparent resin film is used as the base material or when the whiteness of the base material is low, the white ink layer 8 is provided thereon to control the surface reflection characteristics, and this is used as the base material.

[0018]

EXAMPLES Next, the present invention will be described more specifically based on examples.

[Example 1] A polyethylene terephthalate film (white PET film 50 µm) containing a filler was used as a base material for the label and the separator. The following conductive coating solution A was applied onto each base material using a wire bar # 5 and dried to form an antistatic treatment layer.

(Liquid A) Conductive paint Phosphorus doping type 10 parts by weight (ELCOM P-3201; manufactured by Catalysts & Chemicals Co., Ltd.) Silicon resin powder (Tospearl 240; manufactured by Toshiba Silicone Co., Ltd.) 0.3 parts by weight Fluorescence Whitening agent (Kaycor E; manufactured by Nippon Soda Co., Ltd.) 0.075 parts by weight Toluene 15 parts by weight Methyl ethyl ketone 15 parts by weight Next, on the other surface of the label substrate having the antistatic treatment layer formed thereon, the following adhesive The layer solution B was applied to a dry thickness of 10 μm to form an adhesive layer.

(Liquid B) Acrylic adhesive 15 parts by weight Trifunctional isocyanate 0.5 parts by weight Toluene 85 parts by weight On the other hand, on the other surface of the separator substrate on which the antistatic treatment layer is formed, the following solution C is added. The dry thickness is about 0.1
The release layer was formed by coating so as to have a thickness of μm.

(C liquid) 0.5 part by weight of silicone resin (X-62-7223A) Silicon resin (X-62-7223B) 0.5 part by weight 100 parts by weight of hexane Label body and separator thus obtained To
The pressure-sensitive adhesive layer and the peeling layer were adhered to each other with a hand roller to prepare a label image receptor for toner transfer recording.

Example 2 A base material was coated with the following solution D,
A toner image recording / recording label image receptor was prepared in the same manner as in Example 1 except that the solution E was coated thereon.

(D liquid) Matte ink (VM-Mat, M-6; manufactured by Dainichiseika) 50 parts by weight Toluene 7 parts by weight Ethyl acetate 7 parts by weight (E liquid) Conductive paint Antimony doping type (solid content 30% by weight) %) 20 parts by weight (P-3001; manufactured by Catalysts & Chemicals Co., Ltd.) Toluene 40 parts by weight Methyl ethyl ketone 40 parts by weight [Comparative Example 1] Except that the base material is PP synthetic paper (EPG60; manufactured by Oji Yuka) A label image receptor for toner transfer recording was prepared in the same manner as in Example 1.

[Comparative Example 2] A label image receptor for toner transfer recording was prepared in the same manner as in Example 1 except that the following solution F was used as the antistatic treatment layer.

(F liquid) Conductive paint Phosphorus doping type (solid content 30% by weight) 80 parts by weight (P-3201; manufactured by Catalysts & Chemicals Industry Co., Ltd.) Toluene 10 parts by weight Methyl ethyl ketone 10 parts by weight Silicone resin powder (Tospar 240 1.5 parts by weight of Toshiba Silicone Co., Ltd. [Comparative Example 3] A label image receptor for toner transfer recording was prepared in the same manner as in Example 2 except that the following solution G was used as the antistatic treatment layer.

(G liquid) Conductive paint Phosphorus doping type (solid content 30% by weight) 80 parts by weight (P-3001; manufactured by Catalysts & Chemicals Industries Co., Ltd.) Toluene 10 parts by weight Methyl ethyl ketone 10 parts by weight In Examples and Comparative Examples An electrostatic copying machine (manufactured by Fuji Xerox; type 63
0) was used to print a full-color image, and the sharpness of the image was evaluated. High speed spectrophotometer and color difference meter for L, a and b measurements
(Murakami Color Research Laboratory) was used to measure the light source C. However, since the evaluated base material does not have sufficient hiding power, the sample was placed on a white test plate having L, a, and b of 97.3, -0.3, and 0.1, respectively.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Sample L, a, b label surface of the base material L, a, b Whiteness Image sharpness ──────── ─────────── L a b L a b ─────────────── ────────────────────── Example 1 99 -0.3 +0.3 98 -0.1 -0.5 Good Clear Example 2 99 -0.3 +0.3 96 -0.9 +0.5 Good Vivid Comparative Example 1 99 -0.6 +2.1 98 -0.5 +1.9 Slightly yellow Slightly blurred Comparative Example 2 99 -0.3 +0.3 95 -0.8 +1.9 Slightly yellow Slightly blurred Comparative Example 3 99 -0.3 +0.3 86 -2.1 +0.7 Slightly blurred Gray slightly dull ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

[0029]

The label image receptor for toner transfer recording of the present invention has a reflection property of the label surface within a specific range, so that a very clear full-color image can be obtained and the contrast of a monochrome image is sufficient.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a specific example of a label image receptor for toner transfer recording of the present invention.

FIG. 2 is a schematic cross-sectional view showing another specific example of the label image receptor for toner transfer recording of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Label image receptor 2 Label base material 3 Matt processing layer 4 Antistatic treatment 5 Separator base material 6 Release layer 7 Matt processing layer 8 Antistatic treatment layer 9 Adhesive layer

Claims (2)

[Claims] 1. A label image receptor used in a printing device by electrostatic transfer of toner, comprising a label body having an adhesive and a separator detachably temporarily attached to the label body, and the label body and the base of the separator. All of the materials are synthetic resin films, one surface of each substrate has a surface resistance of 10 ⁶ to 10 ¹³ Ω / □, and the surface reflection characteristics of the label are measured by the method specified in JIS Z8722. , JISZ8730
When displayed by the method specified by, L is 90.
As described above, the label image receptor for toner transfer recording is characterized in that a is -2.0 to 2.0 and b is -5.0 to 1.8. 2. The reflectance property of a base sheet used for a label is measured by the method specified in JIS Z8722, and is measured according to JIS Z8722.
When displayed by the method specified by 30, L is 9
The label image receptor for toner transfer recording according to claim 1, wherein 0 or more, a is -2.0 to 2.0, and b is -7.0 to 1.0.