JPH01192950A - Resin composition and building materials - Google Patents

Abstract

PURPOSE:To obtain such building materials that can keep the humidity in a room about constant by mixing a specific weight percentage of mineral system filler provided with fine holes having an absorption action into olefin vinyl alcohol copolymerization resin. CONSTITUTION:5-200weight% of mineral system filler provided with fine holes having an absorption action is mixed into 100weight% of olefin vinyl alcohol copolymerization resin to form resin composition. The resin composition has high mechanical strength and moisture absorption - and discharge efficiency. Accordingly, when it is used as building materials, water content is discharged in case indoor humidity is low, water content is absorbed in case indoor humidity is high, and a room temperature is kept about constant to improve living environment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a resin composition with excellent nailing properties, impact resistance, and humidity control properties, and a building material that is an application thereof.

[Conventional technology]

Various materials are used for building materials, including wood and synthetic resin. Recently, there is a high demand for decorative and unique materials, and for this reason, materials whose surfaces are coated or painted with synthetic resin, such as printed plywood and synthetic resin wallpaper, are often used.

In addition, building materials made of synthetic vA resin are highly productive and complex.

In addition to being able to be formed into various shapes, it is also lightweight, so it has come to be used as an alternative to wood materials.

[Problem to be solved by the invention]

It is said that houses made of synthetic resin are less comfortable to live in than houses made of wood as interior materials. This is because wood absorbs and releases moisture, so it is possible to keep indoor humidity at a nearly constant level, but synthetic resin does not have the moisture absorption and release properties that wood does. The same applies to building materials made of thick wood coated with synthetic resin.

In addition, synthetic resin building materials are prone to condensation, where indoor moisture adheres to walls, etc. If dew condenses on walls, etc., it can cause other constituent materials to rot, significantly reducing the service life of the house. I'll let you.

Furthermore, the synthetic resin used for the interior material has a high rigidity, which causes it to break easily when nailed, and has a low nail holding power.

The present invention was made to solve the above problems,
The object of the present invention is to provide a resin composition that has mechanical strength and moisture absorption and desorption properties similar to those of wood materials, and a building material that is an applied product thereof.

[Means to solve the problem]

The present invention for solving each of the above-mentioned problems will be explained.

The resin composition of the first invention is characterized in that 5 to 200 parts by weight of a mineral filler having pores exhibiting an adsorption effect is blended with 100 parts by weight of the olefin-vinyl alcohol copolymer resin. .

The resin composition of the second invention is characterized in that the mineral filler of the first invention has an average particle size of 0.5 to 200 μm.

A building material according to the third invention is characterized by comprising the resin composition according to the first invention.

A building material according to a fourth invention is characterized by comprising the resin composition according to the second invention.

As the olefin-vinyl alcohol copolymer resin which is the resin component of the resin composition and building material of the invention described above, those having a structure in which olefin and vinyl alcohol are copolymerized can be used. In particular, ethylene-vinyl alcohol copolymers are good in terms of mechanical strength and moldability.

A material having gas adsorption properties is used as the mineral filler used in the resin compositions and building materials of these inventions. Zeolite and sepiolite are particularly suitable. The blending amount of the mineral filler is 10% of the olefin-vinyl alcohol copolymer resin.
It is preferable to mix 5 to 200 parts by weight with respect to 0 parts by weight. If it is less than 5 parts by weight, suitable moisture absorption and desorption properties cannot be obtained, and if it is more than 200 parts by weight, physical strength will decrease. In addition, it is desirable that the average particle size of the mineral filler is 0.5 to 200 pm.If it is less than 0.5μ, the moldability will be poor, and if it is larger than 200#L, it will be difficult to form the surface of the resin composition and building materials. Sexuality decreases.

The method for mixing the olefin-vinyl alcohol copolymer resin and the mineral filler may be the method generally used for mixing synthetic resins and fillers, but it is particularly desirable to mix using an extruder, kneader, or Banbury mixer. .

These resin compositions and building materials can be molded by molding methods used for molding general thermoplastic resins, such as extrusion molding, injection molding, and pressure molding.

From the viewpoint of productivity, extrusion molding is preferred.

These resin compositions and building materials contain fillers such as calcium carbonate and wood flour, and various additives such as lubricants, antioxidants, antistatic agents, flame retardants, fungicides,
A foaming agent, a mouse repellent, an anti-termite agent, an ultraviolet absorber, and a coloring agent may be added.

[Effect]

The resin composition and building material of the present invention absorb moisture in a high humidity environment, and release the contained moisture in a low humidity environment. Furthermore, even if a nail or the like is driven into it, no cracks will occur, and the nail will be held securely.

〔Example〕

Examples of the present invention will be described in detail below. Note that the comparative example is an example to which the present invention is not applicable.

Example 1 As an olefin-vinyl alcohol copolymer resin, an ethylene-vinyl alcohol copolymer resin (manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd., Soarnol D, ethylene-containing soft 29 mo1%)
) and 30 parts by weight of Seviolite (manufactured by Omi Mining Co., Ltd., Miraclay G4/8) with an average particle size of 35 μm after 5 classification as a mineral filler were extruded in the same direction with 41! (manufactured by Kurimoto Iron Works Co., Ltd., model KRC kneader S-1) was melt-kneaded at 220"C to obtain a resin composition.
Press molding was performed at 220° C. to produce a sample plate measuring 5×15Q×150 mm.

Example 2 A sample plate was prepared in the same manner as in Example 1, except that the amounts of the olefin-vinyl alcohol copolymer resin and the mineral filler were each 50 parts by weight.

Example 3 As the olefin-vinyl alcohol copolymer resin, ethylene-vinyl alcohol copolymer resin (manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd., Soarnol D, ethylene content 29 mo1%) was used.
) A sample plate was prepared in the same manner as in Example 1, except that the sample plate was used.

Example 4 A sample plate was prepared in the same manner as in Example 1, except that 4A type zeolite (manufactured by Nippon Kagaku T Gyo Co., Ltd., Zeostar NA-110P, layer with average particle size of 3 μm) was used as the mineral filler.

Comparative Example 1 The amount of olefin-vinyl alcohol copolymer resin was 97%.
A sample plate was prepared in the same manner as in Example 1, except that the amount of melon and mineral filler was changed to 3 parts by weight.

Comparative Example 2 Olefin-vinyl alcohol copolymer 11 The amount of fat was 3
Melt-kneading was carried out in the same manner as in Example 1 except that the amount of the mineral filler was 70 parts by weight, but the kneading properties were poor and a resin composition could not be obtained.

Comparative Example 3 The olefin-vinyl alcohol copolymer resin alone was put into an extrusion molding machine equipped with a die having a cross section of 5 x 150 mm, and extrusion molded at a molding temperature of 180 to 220°C. The molded product was cut to obtain a sample plate of 5×150×15 ha.

Comparative Example 4 A sample plate was obtained in the same manner as Example 2 and Example 1, except that polypropylene resin (Mitsui Toatsu Chemical Co., Ltd., Noblen JH I-791) was used instead of the olefin-vinyl alcohol copolymer resin. Ta.

Comparative Example 5 As a mineral filler, the average particle size was 0.3 μm by 1 classification.
Cross-wire melting was carried out in the same manner as in Example 1, except that sepiolite (manufactured by Ohmi Mining Co., Ltd., Miraclay 0478) was used, but the kneading properties were poor and a resin composition could not be obtained.

Comparative Example 6 As a mineral filler, the average particle size was 250IA by 5 classification.
A sample plate was obtained in the same manner as in Example 1, except that a+ sepiolite (manufactured by Ohmi Mining Co., Ltd., Miraclay 04/8) was used. The obtained sample plate had a severely uneven surface.

Comparative Example 7 A sample plate was obtained in the same manner as in Example 1, except that mica (Sujirite Mica 325HK, manufactured by Kuraray Co., Ltd.) was used as the mineral filler.

Note that these sample plates can be used as construction materials as they are.

The sample plates obtained in each Example and Comparative Example were evaluated by the following method.

・Mechanical strength (resistance to nailing) 5℃, 50
%R, H, an iron nail with a diameter of 3+s layer and a length of 85 mm was driven into the center of the sample plate with gold tin, and the degree of cracking of the sample plate was visually observed.

- Humidity control (hygroscopicity and moisture release) After placing the sample plate in a vacuum desiccator (see Contents JA8.7) and thoroughly deaerating the inside, heat at 23°C1 relative humidity 20%R.
, H, the following dry air is enclosed. Measure the humidity immediately after sealing and after 3 hours, and evaluate the moisture release performance from the humidity change. Degas the inside of the desiccator at 0th + If degree, and humid air at 23 ° C and relative humidity of 80% R, H or more. Encapsulate. The humidity was determined immediately after enclosing and after three passages, and the hygroscopicity was evaluated in the same manner.

In the mechanical strength test, those with no cracks even after driving a nail are given a mark of "×" and those with Ol cracks. In the humidity control test, the humidity inside the desiccator after 3 hours was 2.
0%R,H, those that have changed more than 0.20%R,) 1.
If it is less than that, mark it as ×. As for the overall evaluation, if all items are good, ○ is given, and otherwise, × is given.

These results are shown in the table below.

(The following is a blank space) Table 1 [Effects of the Invention] As explained in detail above, the resin composition of the present invention has excellent mechanical strength and moisture absorbing and releasing properties.

Building materials using this resin composition have better productivity than building materials made from wood, and can be produced and used even in lightweight and complex shapes. During construction, nails can be driven in just like wood. It also has moisture control properties similar to wood. When used as a building material, it releases moisture when the humidity inside the house is low, and absorbs moisture when the humidity is high, keeping the indoor humidity almost constant, making it possible to live a comfortable life.

Patent applicant: NOF Corporation

Claims (1)

[Claims] 1. A resin composition characterized in that 5 to 200 parts by weight of a mineral filler having pores exhibiting an adsorption effect is blended with 100 parts by weight of an olefin-vinyl alcohol copolymer resin. . 2. The average particle size of the mineral filler is 0.5 to 200 μm
The resin composition according to claim 1, characterized in that: 3. A building material comprising the resin composition according to claim 1. 4. A building material comprising the resin composition according to claim 2.