JPS6034699A - Base paper for antistatic decorative board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on π1. It relates to base paper for decorative laminates,
More specifically, conductive material sequences 1 to 5 for cellulose pulp
The present invention relates to an antistatic base paper for decorative laminates containing 0 layers of pigment and a shielding pigment in an amount of 5 to 1 (by weight).

In recent years, combination 5. - The IT density of electronic devices such as computers, etc., and the hemorrhoids of child devices are increasing significantly, and the benefits of these devices are increasing in various fields. Due to the increased use of these devices, there is an increasing risk of them becoming easily damaged or malfunctioning due to sparks caused by static electricity. In order to prevent such troubles due to static electricity, it is necessary to take measures to prevent static electricity from being generated in the environment in which these delicate devices or their parts are handled. Conventionally, thermosetting resin decorative boards have excellent properties such as heat resistance, abrasion resistance, stain resistance, and impact resistance, and are used for office desks and work tables.

Although it has been used for horizontal surfaces such as desks, such thermosetting resin decorative boards are insulative and therefore easily charged with static electricity, and there is a high risk of problems caused by static electricity as described above, so there is a need to prevent this. At present, a conductive sheet is placed on top of it to protect it.

On the other hand, methods for producing conductive paper have been proposed, such as a method in which conductive inorganic powder is mixed with cellulose pulp slurry to make paper, or a method in which conductive fibers are mixed in cellulose pulp slurry to make paper. However, if you try to use some of these conductive papers as thermosetting resin decorative laminates, it will not be a problem, but at the end of the day, these conductive papers
Because it is made primarily for conductive properties, it has been found that it has the following drawbacks when used for decorative boards. For example, if you mix carbon fiber with pulp slurry, make paper, place the resulting conductive paper on the front side of the decorative board, process it with thermosetting resin, and heat-press mold it, you can create a thermosetting resin molded board. However, the black whisker-like pattern of the carbon fiber stands out, and from a design standpoint, its uses are extremely limited.

In addition, if you just mix conductive fibers with pulp slurry and paper-deposit it, it will not have any shielding properties.

If this is placed on the front side of the decorative board to create a decorative board, the color of the base material will stand out on the surface, which will also significantly impair the design and make the properties of the decorative board extremely poor. In order to improve the drawbacks of the prior art, the inventors of the present invention have conducted intensive studies and have completed the present invention.

The purpose of the present invention is to eliminate the shortcomings of conventional methods and obtain a base paper for decorative laminates with excellent control properties and design by using a combination of a conductive substance and a shielding pigment. do.

The base paper for electrically conductive decorative laminates of the present invention contains 1 to 50% by weight of conductive substance and 5 to 100% of shielding pigment based on cellulose pulp.
It is characterized by containing 51% weight.

Examples of conductive materials include carbonaceous fibers and metal τ [ta fibers].

Conductive R%'1 range glue and/or organic conductive fiber etc.
or conductive zinc oxide, tin oxide, antimony oxide.

Conductive metal oxides such as titanium oxide, or powders that are originally insulating such as silica and alumina, whose surfaces are metallized or doped with conductive substances.

Or metal compounds such as copper iodide, copper, or nickel.

At least one kind is selected from fine metal powders such as aluminum, tin, and zinc, and conductive inorganic powders such as carbon black. These conductive substances are further incorporated into the paper layer by mixing.

To explain in detail, the conductive fiber is preferably in the range of 1 to 15 fibers mainly from the viewpoint of paper-making properties and tetraelectricity. Examples of carbonaceous fibers include so-called PAN-based charcoal purple IJl produced by firing polyacrylic vinyl (IJ) fiber, or so-called pitch-based carbon fiber produced by spinning and firing pitches obtained from petroleum or the like.

Alternatively, it is a general term for so-called organic fibers such as those obtained by firing rayon, kynol fibers, etc., which are fired or activated if necessary.Metallic fibers include stainless steel, copper, Gold M made of aluminum, nickel, etc. is formed into a string shape, and scale or flake shapes can also be used if necessary. Examples of organic conductive fibers include organic fibers that have been adsorbed with one ion of gold such as copper ions and then reduced, organic fibers that have been metal plated or coated with metal, and carbon black as a spinning raw material. , those made by kneading and spinning conductive substances such as iodine, and various other organic fibers that have been proposed for conductive treatment, and are limited to these as long as they can be mixed into two papers. isn't it. Further, the conductive inorganic powder is incorporated into the paper by internal addition or surface coating. The effective antistatic content of these conductive substances varies depending on their type, shape, method of inclusion, etc., but the surface resistance value of the base paper must be 1090 or less, preferably 10'Ω or less. For example, if there is only conductive fiber, it is 8~
10% by weight (based on pulp solid content), 10 to 50% by weight (based on pulp solid content) if only conductive inorganic powder is used, and 1% by weight if it is a combination of electrically conductive fibers and electrically conductive inorganic powder. ~5% Hayabusa (based on pulp solid content), conductive inorganic powder 5
It is desirable that the content is about 15% by weight (based on pulp solid content).

On the other hand, as the shielding pigment, at least one type is selected from among pigments with a large hiding power such as titanium oxide, lithopone, chlorine, zinc sulfide, molybdenum red, red red iron group 2, etc., and the content is 5 to 100 weight: l:% is preferably 15 to 70 weight ratio (relative to pulp solid content). Further, these shielding pigments are effective when added internally to paper waste or coated on the surface. In addition to these shielding pigments, insoluble azo pigments,
L/-ki series, 7 thalocyanine series, triphenylmethane series, quinacridone series, thioindigo series, dioxazine series,
Organic pigments such as perinone perylene, isoindolinone, fluorobin, anthraquinone, pyrocholine, coupled azo, condensed azo, and complex complex salts, barium sulfate, alumina white, calcium carbonate, etc. Extender pigments, white pigments such as zinc white, fillers such as silica, alumina silicate, clay, talc, etc. can be mixed and used.◇ The base paper for antistatic decorative laminates obtained by the present invention.

As its name suggests, it is used as a component of fljlIYE decorative laminates. The decorative laminate is manufactured in the same manner as the conventionally known thermosetting resin decorative laminate manufacturing method. fever 11IJ
! Examples of non-toxic resins include phenol, melamine, and elastomer.

unsaturated polyester, epoxy, diallyl phthalate,
alkyd, polyurethane, furan.

There are polyimides, polyamides, imides, etc.

Itching is not limited to these. On the other hand, the structure of the decorative board is mainly to use the base paper of the electrically conductive decorative board 1 of the present invention as the surface layer, and to apply a conventionally known substrate for the lower part, and to integrate them by heat-pressing or laminating. . In order to obtain antistatic performance, the surface resistance value after molding must be 10,100 or less, preferably 188Ω or less. Base materials include core paper impregnated with thermosetting resin, particle board, plywood,
Examples include @plate, core paper impregnated with thermoplastic resin, etc., but are not limited to these. Note that it is also possible to use antistatic decorative laminate base paper as the base material.

The present invention will be explained in more detail with reference to Examples below.
It was beaten to 0°SR and prepared into a pulp slurry with a concentration of 8%. PAN-based carbon fiber μx is added to this pulp slurry.
6 m) 7 ] R: The amount of melamine-based paper strength enhancer was 2.0% by varying the amounts of titanium oxide (rutile type) and titanium oxide (rutile type).
(For pulp), TAPPI was well stirred in a disintegrator, and paper was made using a square test machine in a conventional manner. Table 1 shows the composition of the sample and the measured physical properties. Note that the antistatic decorative laminate base paper obtained here was impregnated with Nikaresin (manufactured by Nippon Carbide Co., Ltd.), which is a melamine resin for high-pressure melamine decorative laminates.

A high-pressure melamine decorative board was obtained by stacking phenol core paper as a base material and hot-pressing it to form a high-pressure melamine decorative board.The results of measuring the surface resistance value are also shown in Table 1. At the same time, the surface electrical resistance values of ordinary high-pressure melamine decorative laminate base paper and decorative laminate are also listed as comparative examples.

[Margin below]

Example 2 Cross decoration example 1. Using the sample of Comparative Example 1 listed in Table 1, the surface resistance was measured after coating 20 sheets of #.Ashinized titanium dispersion and drying. 4. fiXI
It was Q'Ω. Using this product, a high-pressure melamine decorative board was prepared in the same manner as in Example 1. The surface resistance value of this decorative board was 5.6XlO'Ω, and the shielding property was good and comparable to that of Na2 listed in Table 1.

Example 8 Example 1. Using the sample of Comparative Example 2 described in Table 1, 15 coats of a conductive titanium oxide (Mitsubishi Metals W-1) dispersion was applied to the surface and dried.

When the surface resistance value was measured, it was 2.13×10Ω.

Using this material, a high-pressure melamine decorative board was obtained in the same manner as in Example 1. The surface resistance value of this decorative board is 6.2
X10'Ω, and had antistatic performance f:. Also,
The shielding property was comparable to that of Na4 listed in Table 1, and was very good.

Example 4 Pulp formulation, beating conditions 2 Addition of paper strength enhancer, etc. Example 1
In the same manner as above, 1% by weight (based on pulp) of PAN-based carbon fiber (μ x 6 ends) as a conductive fiber, 15% by weight of conductive titanium oxide (W-1 manufactured by Mitsubishi Kin PA), and further as a coloring pigment. Handmade paper was obtained in the same manner as in Example 1 by mixing 20% by weight of red red iron. The surface resistance value of this item is 4.8X
Using this paper, we made a low-pressure melamine decorative board with particle board as the base material and measured the surface resistance value of it, which was 7.2XlO'Ω. Moreover, the shielding property was also good.

Example 5 Pulp composition, beating conditions 1, amount of paper strength enhancer added, etc. are as in Example 1
Similarly, as conductive fibers, acrylic fibers, Thunderon 5S-N (2d x 5
aun) l 0 weight 11% and titanium oxide 30 weight ii, s
were mixed, and handmade paper was obtained in the same manner as in Example 1. The surface resistance value of this product was 8.4×10 5 Ω. Also,
Using this paper, a high-pressure melamine decorative board was obtained in the same manner as in Examples 1 and F, and a surface resistance of 1 was measured.
Ω, and the shielding property was also good.

Patent Applicant Co., Ltd. Intake Procedure Amendment 1972. I'j) 50 Japan Patent Office, &/g group, p/kyushitai b position address name 5, sleeve 116 "Attachment 11 of the Ordinance 6, supplementary number of inventions added by JJI 7 7,
hli 'I+,ノ:rl <Q 5F4H4Q N
Q * Contents of J'JR Prisoner 8, Sode 11'' Sea bream, M invention, rod axis, ring 2 virtue L) 3', F'7 and chant.
9 Correction Softening 1. 1) November 1-j#'s -5E t Suku 1< T
-Ia 12 “2.・Boo 1\39) Machine stone 1111 River 1
1 Mt. layer---"? ) Uripo 1-°force ゛ and t') 槻EN 11 Root A ri, shi `` gome yam E
-''r-#fWhi4'p.

Yun Zhu Chao 1q 1000 4 shellfish / l ~ / 7s 7: r -9≦-1
; LaL'17shi"7= Buri %, 4 f j=
I [shoulder za (ζ 3.

Poor t Ming 13, and 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a night, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, 4 meals a day, and the 4 meals a day.
L, t Shi L Masatsuri San 11 sun 1:4 Shoulder guyatsu Q Ori Kiryu Hi to East - 1).

3 iag 5Il14 d7'in'fA, 1F4i
1 = 1 - Gravebayashi εL Koshi, Tsubame To.

Tometsu ( "1. Gathering material [directly, beast Lu"] k t4’b・ J4-8 to 1/:3-4AL1

Claims (1)

[Claims] 1. A base paper for electrically conductive decorative laminates, characterized in that it contains 1 to 5 μl of conductive material and 5 to 100 μl of traceable pigment to cellulose pulp. 2. The conductive material contains conductive fibers and/or or the antistatic decorative laminate base paper according to claim 1, which is a conductive fine powder.