JPS60187597A - Base material for campus - 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 relates to a canvas base material, more particularly to a campus base material made of cardboard, and more particularly to a campus base material made by laminating and bonding one or more sheets of cardboard.

Traditionally, the base materials for oil paintings and tenbella paintings have been wood boards, irrigation plywood, verticle boards mainly made of wood, cardboard,
Materials such as linen or cloth stretched over a wooden frame have been used.

If necessary, the above-mentioned wooden boards, unfavorable plywood, verticle boards, cardboard, etc. can be used as a base material, with natural or synthetic cloth pasted on the surface, and the surface treated if necessary. Ta.

Although these base materials have the advantage of being inexpensive depending on the product, they have drawbacks such as being heavy, prone to warping, and being sensitive to water.

The most widely used canvas at present, made of linen cloth stretched over a wooden frame, is quite expensive, and linen cloth is prone to humidity in Japan's climate.
Expanding and contracting under the influence of temperature differences is the biggest cause of cracks in the used paint and paint peeling.

The inventors of the present application have conducted various studies, succeeded in eliminating many of these drawbacks, and have arrived at the present invention.

That is, the present invention is as follows.

A canvas base material made by laminating and bonding one or more pieces of cardboard and reinforcing the surrounding area and other parts with pieces of cardboard or other materials as necessary.

The base material of the present invention is extremely easy to process such as cutting, and by using an appropriate cardboard, it has high water resistance.
Expansion and contraction due to humidity and temperature is extremely small and does not cause deformation.
It is light, convenient to carry, and extremely cheap, and even when you draw directly on it, it gives off a rustic taste.

The basis of the present invention, 0, can be used as it is, but it can also be used by attaching cotton cloth, linen cloth, etc. to the table 1ni, and applying a surface coating such as lead white or stone Ir type.
The structure of the campus base material of the present invention will now be explained with reference to the drawings.

The cardboard used is single-sided or double-sided cardboard.

For small drawing boards, such as those from SM to size 4 or smaller, it may be as low as -1. If greater strength is desired or the size is larger, two or more of the above single-sided or double-sided cardboard boxes are laminated and bonded. When laminating, as shown in Figure 1 (IF cross-sectional view) and Figure 2 (leftward cross-sectional view) (both are partial views of three layers of single-sided cardboard stacked), the groove directions of the core paper should cross each other. This has the effect of reducing warping of the canvas base material.

FIG. 3 is a partial front cross-sectional view of the case where the four peripheries of the canvas base material are reinforced with four-layer laminated pieces of single-sided cardboard.

In FIGS. 1 to 3, reference numeral 1 indicates linal paper, 2 indicates core paper, and 3 indicates attached linen cloth.

The cardboard of the present invention may be a normal cardboard, but it is preferable that the organic incyanate composition be applied to at least one surface of the liner paper and the core paper (there are two of each, for example, a total of four surfaces for a single-sided cardboard). It is reinforced cardboard.

There are various methods to strengthen the cardboard and produce the base material for Shikyarepas, such as the following, and the most appropriate method is applied depending on the purpose and situation. 1. (1) Both sides of the liner paper and the core After applying the organic incyanate composition on both sides of the paper, a single-sided cardboard is adhesively assembled to produce a campus base system, which is used as is.

(2) After applying the organic incyane-1 composition to the inner surface of the liner paper and/or the surface of the core paper on the liner paper side,
The single-sided cardboard that has been assembled with adhesive is coated with an organic incyanate composition and further strengthened before use.

(3) Corrugated cardboard using liner paper and core paper not coated with organic inocyanate composition, i.e., ilmu1('
A campus base material is manufactured using the cardboard of 7, and an organic isocyanate composition is applied to the entire outer surface (i) to strengthen it before use.

The organic incyanates used in the present invention include phenyl isocyanate, dodecyl inocyanate, butylnoenyl inocyanate, tolylene inocyanate (TDI),
Diphenylmethane diisocyanate (MDI), naphthalene diisocyanate (MDI), hexamethylene diincyanate (HDI), valanene diisocyanate, lysine diincyanate (LDI), dicyclohexylmethane-4,4t-di-incyanate (hydrogen) (MDI), inophorone diincyanate (IPDI)
); cyclic, aromatic mono- and polyisocyanates.

In addition, carbodiimides of these incyanates, terminal isocyanate grays obtained by reacting with polyhydric alcohol additives such as Todo or Biuret products, trimethylolpropane, polyether polyols or polyether bottles. Polymers can also be used. These organic isocyanates may be used alone or in combination of two or more.

Particularly when reinforcing the outer surface of the canvas substrate, it is preferable to apply an aliphatic or alicyclic isocyanate to prevent discoloration over time.

When applying organic incyanate, it is possible to apply it as is by brush or machine, but in order to apply it thinly and evenly, and to improve its affinity with the campus basement membrane and enhance the reinforcing effect, it is necessary to apply it as a composition. It is desirable to use it. That is, a surfactant is added to an organic inocyanate, but a composition obtained by partially modifying the isocyanate groups is used.

As the surfactant, cationic surfactants, anionic surfactants, bifacial surfactants, nonionic surfactants, animal and plant waxes, etc. are used. The amount added is 0.2-7 parts by weight per 100 parts by weight of organic insulators.

In addition, in order to partially modify the incyanate group, monofunctional fluorol is polymerized with ethylene oxide or ethylene oxide and propylene oxide. The obtained modified isocyanate is a liquid with a viscosity of 80-600 cps/25°C and an isocyanate-containing nail content of 20-40 jR%.

These organic incyanate compositions can be applied directly using a roll coater, but if they are dispersed in water or dissolved in an organic solvent, they can be applied uniformly by a method such as brush application. I can do it. Examples of organic solvents include aromatic hydrocarbons such as toluene and xylene; aliphatic hydrocarbons such as hexane, heptane and octane; petroleum solvents ranging from kerosene to kerosene; esters such as ethyl acetate; acetone; Ketones such as methyl ethyl ketone and methyl imbutyl ketone; ether esters such as cellosolve acetate and butyl cellosolve acetate are used.

The weight mixing ratio of the organic incyanate composition and water or organic solvent is preferably 1:99 to 75:25.

The applied organic incyanate composition LL cures by reacting with moisture in the air, but curing takes some time.9 To accelerate curing, tertiary amines or organometallic compounds known as catalysts for polyurethane may be used. Organic isocyanate 1.
It is added in an amount of 0.1 to 5 parts by weight per 100'R parts.

In addition, to adjust the texture of the coated surface, the organic isocyanate composition includes white lead, gypsum, barium sulfate, rosin, wax, etc.
Starch, zinc oxide, calcium carbonate, etc. can also be added.

In carrying out the present invention, the coating amount of the organic isocyanate-1 composition is suitably from 1 to 50 parts per square meter of cine volatile content.

Above, organic incyanate-based compositions have been described, but in addition to these compositions, it is possible to obtain effects similar to those of urea formaldehyde, melamine formaldehyde, and polyacrylamine-based compositions. The campus base material is lightweight and easy to handle, does not change in appearance such as warping even after a long period of time, and has excellent moisture resistance.

The present invention will be explained below with reference to Examples.

Example 1 Crude diphenylmethane diisocyanate (Mpl-CR200 manufactured by Mitsui Nichibo Urethane Co., Ltd.) and hydroxyl value 67m
9KOH/? Incyanate foundation A] obtained by heating reaction with polyperforated alkylene monool of
% and a viscosity of 21.5 cps/25° C., 100 parts of a modified organic inononanate composition was mixed and dispersed with 100 parts of water.

This aqueous agent was applied to a total of four sides of the liner paper and the core paper by a roll coater in an amount of 912f (67% as non-volatile content) per square meter, and then adhered with starch glue to assemble a single-sided cardboard.

This single-sided cardboard is crossed with the groove direction of the core paper,
A canvas base material was produced by laminating and gluing three layers.

This canvas base material is extremely light and easy to handle.

This base material was left in a constant temperature room maintained at 80° C. and 10% relative humidity for one week, but no warping or deformation occurred.

Example 2 The water-based agent used in the example process was applied to the inner surface of the liner paper and two sides of the liner paper of the core paper in an amount of 1 m2 each with D30F (157 as non-volatile content) using a roll coater. I glued it together with powdered glue and assembled one-sided cardboard.

This corrugated cardboard is made by intersecting the groove directions of the core paper and gluing it in three layers to make a canvas base material (1.7).

100 parts by weight of dicyclohexylmethane-4,4'-diinocyane, 1.5 parts by weight of polyethylene glycol oleate as a surfactant, 0.3 parts by weight of diptyltin dilaurate as a catalyst, and methyl as a solvent. Add 10 parts by weight of inobutyl ketone and stir 1'l'
L, and make a mixed solution.

Apply this mixture to the outer surface of the canvas base material using a brush. (As non-volatile matter:
(1&) Coating 71] It was left to dry at room temperature.

After drying, the nol bottom material was left in a dryer maintained at 80° C. for 1 hour, but no changes in appearance such as warpage were observed. Moreover, even after I 001kj1:J) fJ ultraviolet irradiation, the color changed /:1-Jinaka-)/(.

Example: The swirl and direction of the ordinary double-sided corrugated cardboard core paper of 111 sales are mutually damaged: 'I layered and bonded to make a Gihenbus base layer 5, and the outer surface was manufactured in Example 2. Using a brush, apply the mixed solution to 802 kg/m2 (mixed with non-volatile matter - C4t) using a td's cloth and leave it to dry at room temperature. It rises easily, is easy to handle, is lightweight, and is resistant to ultraviolet rays.
o O++! Example 4 In place of the modified organic isocyanate composition of Example 1, an aqueous solution of IOX of acrylamide (manufactured by Mitsui Norih Nikako, trade name: Hopron) was used in place of the modified organic isocyanate composition. Do not use.

This aqueous agent was applied in the same way as in Example 1, and a campus base phase was produced by applying approximately 102 coats of this water-based agent as a cine volatilizer per 1 m2.The properties of this canvas base material were almost the same as in Example 1. Ta.

Example 5 Commercially available double-sided cardboard was made by intersecting the groove directions of the core paper and bonding in three layers to produce a campus base material.
Approximately 13% aqueous solution of epoxy polyamide (manufactured by Mitsui Toatsu Chemical Co., Ltd., trade name: Neelamine) was applied to the outer surface using a brush in an amount of 132 ml of cine volatile content per 1 m2, and the film was allowed to stand at room temperature to dry.

The obtained campus base material had significantly increased rigidity, was easy to handle, was lightweight, and did not cause accidents such as long-term deformation.

[Brief explanation of drawings]

Figure 1 shows the campus base material of the present invention (single-sided cardboard 3
Figure 2 is a partial view of the front cut surface of the left side cut surface of tiered laminated adhesive), Figure 3 is a partial view of the front cut surface of the four peripheries reinforced with single-sided Gunball (four-tiered laminate adhesive) cut pieces. It is a partial diagram. In FIGS. 1 to 3, ■ indicates liner paper, 2 indicates core paper, and 3 indicates linen cloth. Patent applicant: Mitsui Nichiyoshi Urethane Co., Ltd. / / 3 Figure

Claims (1)

[Claims] 1. Campus base material made by laminating and bonding one or more sheets of cardboard and reinforcing the surrounding area and other parts with pieces of cardboard or other materials as necessary.