JPS61201789A - Method for preventing rusting by surface treatment of wood for packing and rust preventive - Google Patents

Abstract

PURPOSE:To prevent effectively the rusting of a metallic article packed in a box by applying a wood treating agent to the surface of wood forming the inside of the box. CONSTITUTION:A wood treating agent is applied to the surface of wood forming the inside of a box in which a metallic article is packed. The treating agent penetrates into the structure of the wood and neutralizes a rusting substance in the wood. The treating agent is alkaline and has high penetrating power. A composition consisting of, by weight, 31-47% 8-20C higher fatty acid, 10-15% diethanolaminedicyclohexylamine mixture having 1:1 weight ratio, 20-40% oil soluble surfactant, 4-8% mineral oil and 15-10% water may be used as the treating agent.

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology applies a wood treatment agent to the inside of the wooden box and the wood frames, neutralizes the emitted acid components, and treats the metal products. This field belongs to the technical field of anti-corrosion methods and anti-rust agents for surface treatment of packaging wood to prevent products from rusting.

The invention of this application relates to a rust-preventing method for surface-treating wood for packaging and a rust preventive agent for surface-treating wood constituting a box for packaging metal parts, etc. to prevent rust from forming on metal parts stored after packaging. In particular, an alkaline highly permeable wood treatment agent is applied in advance to at least the surface of the wood constituting the inner surface of the box so that it penetrates into the wood structure and neutralizes the rust-inducing substances in the wood. This invention relates to a rust-preventing method for surface treatment of packaging wood and a rust-preventing material.

<Prior art> Generally, when transporting metal products, etc., packaging in wooden boxes is adopted.For example, when exporting knockdown parts for automobiles overseas, wooden box packaging is also widely adopted. There is.

However, metal products packed in wooden boxes require a transportation period of about two weeks and a two to three month stay in GM after arriving overseas, which has the problem of rusting during that time.

As a result of investigating the cause of metal products rusting, it has been found that it is caused by acidic rust-causing components emitted from the wooden box.

In particular, approximations, the materials used for the wooden boxes used for packaging include price,
External materials such as lauan and veneer are often used due to their ease of availability, and among the organic acids contained in such external materials, such as acetic acid, butyric acid, and valeric acid, acetic acid, which is highly volatile, is emitted. It is thought to be the main cause of rust.

To deal with this, conventional methods have been to cover the inside of the wooden box with a polyethylene sheet, and furthermore, to wrap the metal parts in the sheet to isolate the two, and to use rust-preventing oil and the like, as disclosed in Japanese Patent Publication No. 58-6540. The method used is to apply paint to completely block the release of rust-causing substances.

<Problems to be solved by the invention> However, in the rust prevention method based on the above-mentioned prior art,
For example, the shipping period is about 2 weeks by sea, and the on-site outdoor storage is about 2 weeks.
In cases where metal products are exposed to high temperature and high humidity environments for up to 3 months, sheet damage may occur due to metal products being transported, and it is not possible to prevent rusting substances from escaping under high temperature and high humidity conditions. First, it had the drawback of causing rust on metal products.

The purpose of the invention of this application is to solve the above-mentioned problems of the prior art, and to solve the problem by applying an alkaline and highly permeable wood treatment agent to at least the surface of the wood constituting the inner surface of the box. It is a technical measure that penetrates into the structure of the wood, neutralizes rust-inducing substances not only on the surface of the wood but also inside, converting volatile acidic substances into non-volatile alkaline salts and stabilizing them. .

<Example> Next, the invention of this application will be described below with reference to FIG. 1.2.

① First, as a result of examining alkaline substances and penetrants, the following was clarified.

(a) As a result of examining various types of organic amines, inorganic amines, inorganic alkalis, and their aqueous solutions as alkaline substances, it was found that a mixture of specific organic amines in a specific ratio is most effective.

(0) As a result of studying various anionic surfactants and their aqueous solutions as penetrating agents, it was found that a specific anionic surfactant is the most effective.

Moreover, the effect is remarkable when a specific combination of oil-soluble substances coexists in the mixed aqueous solution of organic amine and anionic surfactant, and the rust prevention effect is enhanced, preventing rust even under high temperature and high humidity conditions. It turns out that it can be prevented.

Furthermore, this effect is effective only when the above-mentioned oil-soluble substance is finely dispersed in an aqueous solution in a colloidal or solubilized state and is translucent or transparent when seen with the naked eye. It was also found that such an effect cannot be obtained in a dispersed state.

1. (a) In this invention, which was achieved through such a research process, the wood treatment agent that is applied to the wood for packaging metal products to prevent rusting of metal products is A, Cs to C20 higher fatty acid alkali salt 31 ~47 (mass%) B, jetanolamine, dicyclohexylamine mass ratio 1:1 mixture 10-15 (mass%) C0 oil-soluble surfactant 20-40 (mass%) D, mineral oil
4-8 (mass%) E, water
It is required to contain 15 to 10 (mass%).

Higher fatty acid alkali salts that are transparent or translucent at room temperature are
caprylic acid, capric acid, lauric acid, myristic acid,
These include sodium salts, potassium salts, and water-soluble amine salts of valmitic acid, stearic acid, alagic acid, oleic acid, beef tallow fatty acid, coconut oil fatty acid, and castor oil fatty acid.

In addition, in dibasic acids and alkylarylcarboxylic acids, C
A similar effect is observed if the value is 8 or more.

Component A is a penetrant that has the effect of allowing the composition applied to the surface to penetrate into the wood structure.

The sun component is an alkaline substance and has the effect of penetrating itself and neutralizing acidic components.

Component C is an oil-soluble substance, and although this surfactant is not penetrating, it has the effect of coating the wood surface and prevents alkaline salts generated by acidic and alkaline components in the wood tissue from escaping from the surface. It has an effect.

Component D is also an oil-soluble substance like component C, and this mineral oil is
It has the effect of strengthening the fluidity of component C and the effect of absorbing the essential oil in the wood structure and making it non-volatile.

Water, component E, is a dispersion base for the entire composition, and also a base that provides fluidity and permeability.

Among the above ingredients, it is important to limit the amine mixture, which is an alkaline substance in the daily component, to a specific one, and as a result of experiments, the effect of the daily component was remarkable.

The reason for this is thought to be that among the various amines, those with relatively high boiling points, good permeability, and strong alkalinity have a great effect.

Therefore, it was found that morpholine, methylamine, etc., which have a low boiling point, are less effective, and laurylamine, etc., which have poor permeability, are also less effective.

This means that when this composition penetrates into the wood structure and neutralizes the acid component and makes it non-volatile, it is effective if the alkaline component itself has strong permeability, low volatility, and strong neutralizing action. This is considered to indicate that there is.

Of course, the fact that it is less irritating, easy to obtain, and cheap are also advantageous conditions for implementation.

From these viewpoints, an 8-component amine mixture was identified.

(b) A dispersion obtained by dissolving and dispersing each component of A-D in water of component E, and must be uniformly and finely dispersed so as to exhibit a transparent or translucent appearance at room temperature. shall be.

That is, the size of the dispersed particles is in the range of 1 to 1 of the colloidal particle size.
00-μ or less, and if this size is the size of the capillary pores on the surface of the wood, it can penetrate into micropores that are usually said to be about 1 to 100μ. It is possible.

Only a composition in which each of the above components A to E is blended in the above proportions (mass %) results in the above-mentioned finely dispersed state.

The fact that the oil-soluble component is a mixture of components with different HLBs also helps to maintain the balance between oil-solubility and water-solubility and to obtain such a dispersion state.

(2) To prepare a wood treatment agent having the above-mentioned components, for example, an oil-soluble surfactant and a higher fatty acid alkali salt are added to mineral oil and heated to 60 to 80°C to form a uniform composition. Appropriate.

(2) Furthermore, the wood treatment agent can be applied to the surface of the wood used for packaging by applying the wood treatment agent to the surface of the wood used for packaging, such as by rolling, spraying, dipping, etc., regardless of whether it is before or after packaging.

In addition, it is most preferable to use this wood treatment agent without diluting it as it is because it maintains the balance between the components, and this is the basic method of use, but if the concentration exceeds the so':so mass ratio, it should be used after diluting with water. I can do things.

Next, an experimental example based on the above embodiment will be explained.

Samples N001 to 14 having composition ratios as shown in Table 1
The following tests were conducted on each sample using the following methods.

(A) Moisture cycle test in a small wooden box A) Manufacturing method of wood 1 as the box body As shown in Figure 1, square lauan wood 2 and plywood 3 (5.51 am thick) are used as the wood. The external dimensions are a (100) xb (110) xc (1
50) Build a nn+ wooden box.

Method for applying a wood treatment agent to the inner surface of the wooden box 1 Apply the wood treatment agent to the entire surface of the lauan wood 2 for the frame and one side of the veneer 3 (the side that will be the inner surface of the wooden box 1 when assembled) in advance. After applying 18 liters per box, dry it indoors for 10 to 12 hours.

A paint brush was used for application.

c) Test method After applying and drying the wood treatment agent, the wooden box 1 was assembled using a steel material (Material 54).
5c (size: 40φ x 8-m), nailed the lid, and left it for 8 hours at a temperature of 50° C. and a humidity of 95%, and then took it out indoors and left it for 16 hours.

This cycle test was conducted for 10 days to evaluate rust.

(B) Full-scale test A) Manufacturing method of wooden box 1' as a box body As shown in Figure 2, a 45+n square lauan material 2' is framed as the inner material, and a thickness of 5 . Nail the 1st piece of veneer 3'.

When assembling, the joints of the corner surfaces are nailed and fixed, and the external dimensions are a' (1500) x b' (1800).
Build a wooden box of xc' (1500).

口）How to apply wood treatment agent to the wood surface The entire surface of the inner material used when shipping the wooden box 1', and the veneer 3' is coated with wood in advance on the surface that will become the inside of the box when the wooden box 1' is assembled. Apply treatment agent.

The application method is spraying, and the amount of application is approximately 0 per 1 m2.
．． It was 131.

After applying the wood treatment agent, leave it indoors for half a day to dry.

It should be noted that any of the following methods may be used: immersion, spraying using a paint air pump and spray gun, or coating using a paint brush or roller.

C) Test method: Assemble a model w11' with a wood treatment agent applied to the surface of wood or plywood and let it dry.The knockdown parts for automobiles shown below are packed inside it, and this is placed in a constant temperature and humidity chamber. A cycle test was conducted for 10 days in which the specimen was placed in a container and left for 8 hours at a temperature of 50°C and humidity of 95%, then returned to room temperature and left for 16 hours to evaluate rust.

Table 2 Knockdown parts Engine A ssy 1 unit Yare axle A ssy 2 units Pressed product
6 suspension arms 5 drums A SSV 4 differential carriers 1 mission A 1 SSV transfer 1 differential carrier 4 units (C) Overseas trial test Apply a wood treatment agent to the wood and veneer according to method B above, and after drying. The knocked-down parts are stored in the assembled wooden box and transported overseas (Thailand, South Africa, New Sealant, and Indonesia), and upon arrival at the site, the wooden box is immediately unpacked to remove rust from the knocked-down parts. We investigated the situation.

In addition, after the wooden boxes arrived and were kept in stock for one month on-site, they were unpacked and the occurrence of mackerel occurrence in the knocked-down parts was investigated.

From the above test results, as shown in Table 3, by treating packing wood and veneer with a wood treatment agent obtained by blending specific A-F components in a specific ratio, metal parts packed in wooden boxes can be treated. No rust was observed during the overseas transportation period and the local inventory period. It goes without saying that the present invention is not limited to the embodiments, and for example, a wide variety of embodiments can be adopted, such as the materials and components of the wood treatment agent that can be freely selected under optimal conditions.

<Effects of the Invention> As described above, according to the invention of this application, it is possible to reliably prevent rust-inducing components from escaping from the wood constituting the box, and to reliably protect the packaged product from the occurrence of long-term open chains. Excellent effects are achieved.

Furthermore, at least by applying a wood treatment agent to the surface of the wood constituting the inner surface of the box in advance and allowing it to penetrate into the wood structure and neutralize the rust-inducing substances in the wood, rust-inducing substances can be released by applying paint, etc. Compared to methods that prevent rust from occurring, this method has an excellent effect in that it can reliably prevent rust from occurring within the structure of wood by using a neutralizer with the rust-inducing substance, and has extremely high reliability.

In addition, there is the additional benefit that the packing operation does not require the use of sheets or the like, and the efficiency of the packing operation is also improved.

[Brief explanation of drawings]

The drawings show embodiments of the invention of this application, and Figures 1 and 2 are exploded views of each box. 1.1'...Box, 2.2', 3.3'...Wood

Claims (2)

[Claims] (1) In a method for surface treatment of wood for packaging to prevent rust from occurring on metal parts stored after packaging by surface-treating the wood constituting the box, at least the surface of the wood constituting the inner surface of the box is pre-treated. A rust prevention method for surface treatment of wood for packaging, characterized by applying a wood treatment agent and penetrating it into the wood structure to neutralize rust-inducing substances in the wood. (2) Packing characterized by being alkaline and highly permeable in a wood surface treatment rust preventive agent for packaging that prevents rust from occurring on metal parts stored after packaging by surface treating the wood that makes up the box. Rust inhibitor for wood surface treatment.