JPH11241433A - Interior member and its connection structure for preventing diffusion of formaldehyde or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To catch volatile substances such as formaldehyde or the like generating from an adhesive used for interior members or the like by fixing a catching agent on the connection face of the interior members or sticking a sheet-form material including the catching agent thereon. SOLUTION: A tongue 10A and a recess 10b are formed on a pair of confronting faces of a rectangular composite base board, in a decorative wooden floor interior member A1. A liquid formaldehyde catching agent is applied on an upper vertical face 10a1, a tongue upper face 10a2, and an upper vertical face 10b1. A sheet-form material including the formaldehyde catching agent may be stuck on the upper vertical face 10b1, an upper face 10b2, the upper vertical face 10a1, the upper and lower faces 10a2, 10a4 of the tongue, and the front end face 10a3 of the tongue. The formaldehyde catching agent is a liquid or a powder material or the like. It may be adjusted for a composition for application. In this way, formaldehyde or other volatile substances generating from interior members can be efficiently caught to greatly reduce diffusion into a room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior material capable of suppressing the emission of volatile substances such as formaldehyde from an interior material in a building such as a house to a room, and particularly capable of maintaining a simple and favorable environment in the room. , And a joint structure for suppressing emission of formaldehyde or the like in interior materials.

[0002]

2. Description of the Related Art In recent years, volatile organic substances (VOCs) such as formaldehyde released from indoor materials such as ceiling materials, wall materials, floor materials, and baseboards, especially from wood-based interior materials, have caused sick house syndrome and chemical sensitivity. Therefore, it is required to reduce the emission of formaldehyde in particular from such interior materials.

[0003] The above-mentioned emission of formaldehyde is caused by residual formaldehyde contained in an adhesive component used when manufacturing wood materials, such as plywood, particle board and MDF used as a base material or a base material for interior materials. Often due to.

[0004] As a method of reducing the amount of residual formaldehyde contained in the adhesive component, a formaldehyde-free adhesive is used. A formaldehyde catcher such as urea is mixed in the adhesive beforehand. It has been proposed that a decorative sheet material that absorbs formaldehyde is attached to the surface of a wall material or the like to absorb the formaldehyde emitted in the room.

[0005] However, in the above case, the non-formaldehyde-based adhesive is expensive or has insufficient bonding strength, so that there is a problem that it is difficult to use for general purposes.

[0006] In the above case, a considerable amount of formaldehyde catcher must be mixed into the adhesive, resulting in a problem that the cost is increased and the adhesive strength is reduced. In addition, although the amount of formaldehyde emission into the room can be reduced considerably, it cannot be sufficiently eliminated, especially when new or renovated buildings have not had much time since construction. There was a problem that sick house syndrome was easily caused.

[0007] Furthermore, in the above case, it may be expected that formaldehyde after being emitted into the room is absorbed to some extent, but it is intended to absorb what has been emitted into the large space of the room. It is disadvantageous in that it is inefficient and economical because it requires a large area.

[0008]

SUMMARY OF THE INVENTION The present invention has been studied in view of the above problems, and as a result, in the case of wood-based interior materials, the emission of volatile substances such as formaldehyde from the interior materials is mainly achieved by painting or decorative sheets. It has been found that there is much more from the joints (joints) between the interior materials than from the surface of the protected interior material, and the present invention has been completed based on this knowledge.

[0009]

According to the invention of claim 1 of the present application, the "joining end portion (1a or 1a of the interior material)
The interior material (A1) for suppressing emission of formaldehyde or the like in which a catcher agent (2) for mainly capturing a volatile substance such as formaldehyde is fixed to the joint surface of b).

[0010] According to the invention of claim 2 of the present application, "a sheet-like material containing a catcher agent mainly for capturing a volatile substance such as formaldehyde on the joint surface of the joint end (1a or 1b) of the interior material" (3) The interior material (A2) provided with a treatment for suppressing emission of formaldehyde or the like, provided with (3).

Further, according to the invention of claim 5 of the present application, "in the joint formed by joining the interior materials at the ends in the room, at least the indoor side of the joint is mainly formed of formaldehyde. And the like, and a bonded structure (B) for suppressing emission of formaldehyde or the like, to which a catcher agent for trapping volatile substances such as is fixed.

Further, according to the invention of claim 6 of the present application, "in the joint formed by joining the interior materials with each other at the ends in the room, at least the indoor side of the joint is mainly provided. Formaldehyde or the like emission suppression treatment bonding structure provided with a sheet-like material including a catcher agent for trapping a volatile substance such as formaldehyde ”.

[0013] Each invention according to the "claim 1" or "claim 5" of the present invention is characterized in that at least the indoor side of the joint surface of the joint end portion (1a or 1b) of the interior material (A1) or the joint portion of the interior materials. Since the catcher agent (2) that mainly captures volatile substances such as formaldehyde is fixed, in the room where the interior material is installed, the adhesive ( When formaldehyde and other volatile substances generated from the binder, etc. pass through the joint ends of the interior materials, the formaldehyde and other volatile substances are efficiently captured by the catcher agent provided on the joint surface of the joint ends, and indoors. Dispersion will be suppressed.

Each of the inventions according to the "claim 2" or "claim 6" of the present invention is characterized in that at least the indoor side of the joining surface of the joining end (1a or 1b) of the interior material (A2) or the joining portion of the interior materials. Since a sheet-like material (3) containing a catcher agent that mainly captures volatile substances such as formaldehyde is provided, in the room where the interior material (A2) is installed, the interior material itself or the interior substrate Formaldehyde and other volatile substances generated from the adhesives (binders) and the like used for the materials are captured at the joints between the interior materials and are prevented from being diffused into the room by being suppressed.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, an interior material (A1) (A2)
Is used for floor materials, wall materials, construction materials, ceiling materials, etc., and a wooden substrate (1) composed of plywood obtained by laminating and bonding wooden veneers using a thermosetting resin adhesive containing formaldehyde is preferable. Used. For the wood substrate (1), in addition to the plywood, LVL, OSB, MDF, particle board formed using a thermosetting resin adhesive containing formaldehyde, or a composite material thereof is also used. be able to.

The interior materials (A1) and (A2) are also made of a wooden substrate.
A veneer or printing paper is attached to the surface of (1), and a paint finish such as urethane resin paint is applied on it, or a decorative layer (4) with a decorative sheet attached is provided on it. There may be. Further, a cushioning material or the like for improving soundproofing may be attached to the back surface of the wooden substrate (1) on the interior materials (A1) and (A2).

In the interior materials (A1) and (A2) of the present invention, the joining end (1a or 1b) may be a simple butt (FIG. 2a) or a joint (FIG. 2b) of the end faces. The fact that the female / male (10a or 10b) processing (see FIG. 3) is performed as shown in the claim 3 of the present application depends on the catcher agent (2) and the sheet-like material (3) containing the same. This is preferable in that the effect of suppressing the radiation is further improved and the strength is brought to the joint.

As the catcher agent (2) used in the present invention, those usually used in the art can be used as they are, for example, amines such as urea,
Amides and the like. Commercially available products include “Eaclean (PW): manufactured by Ichisha Yushi Kogyo Co., Ltd.”, “RIKEN Resin FC-18-6: manufactured by Miki Riken Kogyo Co., Ltd.”,
"Kazushi Formalin Catcher Agent KA-2000: manufactured by Oshika Kogyo Co., Ltd.", "Unite: manufactured by Kyokuto International Co., Ltd.", "CHEMCATCH: manufactured by Otsuka Chemical Co., Ltd." and the like are available.

The catcher agent (2) may be in the form of a liquid, powder, or other dosage form, as it is, or mixed in a resin solution, or may be used in a suitable coating composition as described in claim 4 of the present application. It is prepared and used. For example, a liquid material can be used as it is, or can be appropriately diluted with water, alcohol, or another solvent according to its viscosity. The powdery material is mixed (or further diluted with a solvent) with a resin liquid such as an acrylic resin or urethane resin,
If necessary, a coating composition can be prepared by diluting with a solvent or adding a thickener. The coating composition adjusted as described above is applied to the entire bonding surface of one bonding end (1a) as shown in, for example, FIG. 3A, but is not particularly limited thereto. When the composition is prepared into a coating composition, the composition may be mixed with a hot melt resin or an elastic resin such as urethane or epoxy to prepare a sealing material. In this case, for example, as shown in FIGS. 3B, 3C and 3D, coating and fixing to the ridge (s) can be mentioned.

In the present invention, the portion to which the catcher agent is fixed may be the joint end (1a or 1b) of the interior materials (A1) and (A2) or the entire joint surface of the joint between the interior materials. It may be a part. Then, both ends to be joined may be used, or either one may be used. For example, as shown in FIG. 4, the catcher agent (2) is fixed to the entire surface of the joint end (1 a) of the interior material where the male (10 a) has been cut (FIG. 4 a). The catcher agent (2) is fixed to the entire surface of the joint end (1b) where the (10b) is cut (b in the same figure), and is fixed to the entire surface of both joint ends (1a) and (1b). The upper vertical surface (10b1) of the female end (1b) and the upper vertical surface (1a) of the male end (1a) 10a1) and the male upper surface (10a2) (Fig. D), the lower vertical surface (10b5) of the female end (1b) -side joint end (1b) and the side surface of the concave groove (10b3). ) And lower surface (10b4),
Of the joint end (1a) on the male (10a) side, those bonded to the upper vertical surface (10a1) and the male upper surface (10a2) (e in the same figure), and the like, but are not limited to these. Not done.

The state of fixation of the catcher agent (2) is a state in which the joining surface is impregnated, or a state in which a part is impregnated and a thin coating layer is formed in the rest, and most of the state where the impregnation is hardly performed is applied. May be formed in the coating layer. When the catcher agent contains a large amount of non-volatile components, or when the coating composition is prepared as described above, the coating film layer is not so much impregnated and a coating layer is formed. Further, by diluting these with an appropriate solvent, an impregnated layer can be formed. In addition, although what was illustrated in said FIG. 4 is a thing partially impregnated, it is not limited to this.

Further, in the present invention, a sheet containing a catcher agent can be used. In this case, for example, FIG.
As shown in the figure, the upper vertical surface (10b1) of the female (10b) and the upper surface (10b2) of the concave groove and the upper vertical surface (10a1) and the male upper and lower surfaces (10a2) and (10a4) of the male (10a) side. In addition, a configuration in which the sheet-like material (3) is adhered to the tip end surface (10a3) is included. In this case, as shown in the drawing, the adhesive may be continuously adhered to the surface of the interior material (A2). In the configuration using such a sheet-like material (3), it may be affixed to one joint end of the joint, or may be affixed to both joint ends. Is also good. Further, as an application example, a combination similar to that of FIG. 4 described above can be considered, or a sheet-like material and the application of a catcher agent may be used in combination.

Even when a base material such as a particle board that emits formaldehyde is further attached under the interior material, the emission of formaldehyde from the interior base material into the room is caused by the joint between the interior materials. , The formaldehyde catching effect can be enhanced as described above.

[0024]

EXAMPLE 1 An interior material (A1) for a decorative wooden floor of this example is a 5-ply rectangular plywood substrate (width 150 mm, length 1800, as shown in FIG. 1, for example).
mm) (1), two pairs of opposing end faces of the four end faces are subjected to actual processing of male (10a) and female (10b), respectively. Then, a WPC-treated veneer is adhered to the surface, and a urethane resin-based transparent paint is applied to the surface to form a decorative layer.
(4) is formed.

The 5-ply plywood substrate (1) is obtained by bonding five veneers using a urea-melamine resin-based adhesive so that the directions of the wood fibers cross alternately. The direction of the fiber is the longitudinal direction.

The adhesive does not contain a formaldehyde catcher agent, and the formaldehyde emission amount rank specified in JAS is F2 class.

The male part (10a) of the interior material for decorative wood floors described above.
Liquid formaldehyde catcher agent (trade name: Riken Resin FC-18-6: 55% non-volatile content, on the upper vertical surface (10a1) and the actual upper surface (10a2) of the Miki Riken Kogyo Co., Ltd.] was applied with a brush by 1.7 g per 1 m length of the male part. The applied state corresponds to FIG. 4d, and a part of the applied part is the male
The fine cracks on the actual processed end face in a) penetrated, and the rest was fixed in a state of forming a thin coating layer.

The interior material for decorative wood floor thus obtained is placed in a small chamber for measuring formaldehyde concentration in the air having a width of 1 m, a length of 1 m, a height of 1 m and a volume of 1 m ³ . It was installed as a flooring as in 1. The number of joints in the length direction, which are joints between the decorative wood flooring interior materials (A1), was 6 (approximately 5.4 m). The environment in the chamber was a closed system with an air temperature of about 30 degrees. The formaldehyde concentration in the air was measured using "Silset" of Shimadzu Corporation.
Measurements were taken every hour for up to 24 hours.

FIG. 6 shows the measurement results of the formaldehyde concentration in the air up to the elapsed time of 8 hours. As is clear from the circles in the figure, the formaldehyde concentration in the air increases almost linearly with the lapse of time, but the amount of formaldehyde emission per hour (emission rate ppm / h) was measured three times. The average value was as low as 0.012 ppm as shown in Table 1 below.

Comparative Example 1 The same interior material as in Example 1 was used except that no formaldehyde catcher was applied.
The sample was set in the same chamber as above, and the formaldehyde concentration in the air was measured. As a result, as is clear from the black circles in FIG. 6, the formaldehyde concentration increased almost linearly with the lapse of time, and as shown in Table 1 below, the amount of emission per hour was 0.041 ppm. It was about 3.4 times of 1.

Comparative Example 2 In Example 1, all joints were sealed with aluminum tape, and the air formaldehyde concentration was measured in the same manner as in Example 1. As a result, as is clear from the mark in FIG. 6, the formaldehyde concentration increased only slightly with the lapse of time, and the amount of emission per hour was 0.00 as shown in Table 1 below.
It was 8 ppm.

From this, it can be seen that most of the formaldehyde emission of the interior material is radiated from the joints, which are the joints between the interior materials, and by giving the joint a formaldehyde catching function, It can be seen that the formaldehyde that is going to be released to the ground can be caught extremely efficiently.

Example 2 A particle board using a urea resin having a thickness of 12 mm as a binder (formaldehyde emission specified by JAS standard is F
3 class) was discarded and applied as a base material on a joist, on which the same decorative flooring material as in Example 1 was attached.
Under the same conditions and under the same conditions, the air concentration of formaldehyde was measured. The emission amount of formaldehyde per hour was 0.014 ppm as shown in Table 1 below.

[Table 1]

[0035]

In a room constructed with the interior material of the present invention [Claim 1] or a room having a joint structure of an interior material according to the present invention [Claim 5], the interior material itself or the interior base material as a base thereof is used. Formaldehyde and other volatile substances generated from the adhesives (binders) used in the material are efficiently captured when passing through the joint, greatly reducing the emission of volatile substances such as formaldehyde into the room Can be done. In addition, the amount of the catcher agent used to capture the volatile substance is small in only the intended joint surface at the joint end, and the fixing process is simple, so that the production is very simple and economical.

In a room constructed with the interior material according to claim 2 of the present application, or in a room having an interior material joining structure according to claim 6 of the present application, the same effect as in claim 1 or claim 5 is provided. In addition to this, the fixation of the catcher agent to the joining end can be further simplified, and the fixation process can be performed easily and uniformly at both the construction site and the interior material manufacturing site. A uniform catch effect can be imparted to any joint of the head.

According to the invention of claim 3 of the present application,
In addition to providing the same effects as those of the inventions according to the “claim 1” or “claim 2” of the present application, since the joining ends are processed into the actual shape, it is natural that the interior materials can be firmly joined to each other. In addition, the complicated shape of the joint surface at the joint end and the contact area thereof can be widened, and the effect of catching volatile substances such as formaldehyde can be further enhanced.

According to the invention of claim 4 of the present application,
In addition to providing the same effect as the invention according to the “claim 1” of the present application, it can be applied by a simple operation of applying at the time of manufacturing the interior material or after the manufacturing, and also the composition and viscosity of the coating composition, etc. By adjusting the thickness, it is possible to impregnate the bonding surface at the bonding end, to form only the coating layer, or to have a variation in application.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a main part illustrating a joint structure of the present invention using an interior material of an example of the present invention.

FIG. 2 is an explanatory view illustrating a joining end of the interior material of the present invention.

FIG. 3 is an explanatory view illustrating an example of fixation of a catcher agent in the interior material of the present invention.

FIG. 4 is an explanatory view for explaining an example of fixation of a catcher agent when forming a joint structure of the present invention.

FIG. 5 is an explanatory view of another example of the joining structure of the present invention.

FIG. 6 is a graph showing the effect of the present invention together with a comparative example.

[Explanation of symbols]

 (A1) (A2) ... interior material (B) ... joining structure (1) ... wood substrate (1a) (1b) ... joining end (2) ... catcher agent (3) ... sheet material containing catcher agent (4) … Cosmetic layer

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification code FI E04F 15/04

Claims (6)

[Claims] 1. An interior material for suppressing emission of formaldehyde or the like, wherein a catcher agent mainly for trapping a volatile substance such as formaldehyde is fixed to a joint surface at a joint end portion of the interior material. 2. An interior material for suppressing emission of formaldehyde or the like, wherein a sheet-like material mainly containing a catcher agent for capturing a volatile substance such as formaldehyde is provided on a joint surface at a joint end portion of the interior material. 3. The interior material according to claim 1, wherein male and female actual processing is applied to a joint end of the interior material. 4. The interior material according to claim 1, wherein the catcher agent is prepared in a coating composition. 5. A joining portion formed by joining interior materials end to end in a room, and a catcher agent mainly for capturing a volatile substance such as formaldehyde is fixed to at least the indoor side of the joining portion. Bonded structure for treatment of emission control such as formaldehyde. 6. A sheet-like material including a catcher agent mainly for capturing a volatile substance such as formaldehyde, at least at a room inside the joint at a joint formed by joining the interior materials with each other at the ends in the room. Is provided with a joint structure for suppressing emission of formaldehyde and the like.