JP6069234B2 - Cellulose-containing foam insulation and method for producing the same - Google Patents

Description

The present invention is an improvement in foam insulation, specifically, not only is it environmentally friendly, but also does not easily cause mold growth or adhesion even when used for a long time, and also contains cellulose with good moldability and foamability during production. The present invention relates to a foam heat insulating material and a manufacturing method thereof .

  As is well known, when a house is constructed, a heat insulating material is often applied under the floor, behind the wall, or behind the ceiling for the purpose of improving the heat insulation in the room. Further, as a heat insulating material for buildings, a board-shaped foam heat insulating material produced by foaming a synthetic resin material (mainly polystyrene, polyethylene, polypropylene, etc.) by an extrusion method or a bead method is widely used.

  However, when the foam insulation for construction is relied on a synthetic resin material derived from petroleum, the foam insulation is consumed in large quantities as a construction material, which easily leads to waste of petroleum resources. Moreover, when manufacturing the said foaming heat insulating material, since the carbon dioxide which is a greenhouse gas is discharged | emitted in large quantities in a manufacturing process, the burden on an environment also becomes large.

  Therefore, in the past, in order to suppress the use of synthetic resin materials, the main material of foam insulation (about 50 wt% of the whole) is made of cellulosic materials (paper powder, etc.) and hydrophilic natural polymer materials (starch, etc.). A technique used for the above has also been developed (see Patent Document 1). Further, Document 1 also discloses a technique of foaming a foam heat insulating material by an extrusion method using water as a foaming agent.

  However, if a cellulosic material having higher water absorption than the synthetic resin material is used as the main material as described above, harmful foam is likely to adhere to and propagate on the foamed heat insulating material, and there is a high risk of causing health damage. . In the technique according to the above-mentioned document 1, calcium hydroxide is added as an antifungal agent. However, since the addition amount is small, a sufficient effect cannot be expected.

  On the other hand, a method of adding a large amount of the above calcium hydroxide to improve the antifungal effect is also conceivable, but if the amount of calcium hydroxide is excessive with respect to the total amount, the main materials (cellulosic material and natural polymer material and heat As a result, the moldability and foamability of the product obtained by mixing with a plastic resin are deteriorated, resulting in a decrease in yield due to poor molding and a decrease in heat insulation performance.

  On the other hand, the foamed heat insulating material mainly composed of the cellulose-based material has a drawback in that it is easy to cause damage due to rubber leaf. Nevertheless, conventionally, since sufficient insecticidal measures have not been taken with respect to the cellulose-containing foam heat insulating material, there has been a problem that the function of the foam heat insulating material is deteriorated due to corrosion damage after construction.

  In addition, conventionally, a technique has been known in which a small animal intrusion prevention plate containing a repellent component is installed at the base of a building to suppress the intrusion of the cocoon under the floor (see, for example, Patent Document 2). In the above-mentioned foam heat insulating material, since measures were not taken to prevent biting of the cocoon, there was a problem that the cocoon broke into the foam heat insulating material and entered the room.

Japanese Patent Laid-Open No. 2003-41041 JP 2001-112403 A

The present invention has been made in view of the above problems, and its purpose is not only to reduce the burden on the environment, but also to adhere and propagate mold that causes health damage even when used for a long time. An object of the present invention is to provide a cellulose-containing foam heat insulating material that is difficult and yet has excellent functionality without impairing moldability and foamability during production, and a method for producing the same.

  Means employed by the present inventor for solving the above-described problems will be described with reference to the accompanying drawings.

That is, the present invention relates to a method for producing a heat insulating material having a foam molded body 1 as a main body, comprising a powdery cellulosic material; a hydrophilic natural polymer material; an antifungal agent; and a polyolefin resin. The foamed molded product 1 is prepared by heating and mixing and foam molding in a state where a foaming agent is added , and at least pyrithione and imidazole fungicides as the fungicide, and the total amount of these is a cellulosic material. Add 100 to 100 parts by weight of the combined natural polymer material to add 0.1 to 6 parts by weight, and mix the cellulose-based material, natural polymer material and fungicide in advance to form a pellet. This method is characterized in that it employs a method of foaming by adding a polyolefin resin and water to the product .

  In addition, for the pyrithione antifungal agent and the imidazole antifungal agent, in order to obtain a sufficient effect, the total amount is 0.1 parts by weight when the combined amount of the cellulose material and the natural polymer material is 100 parts by weight. It is preferable to be ˜6 parts by weight. In that case, it is preferable that the amount of each of the pyrithione fungicide and the imidazole fungicide is 0.05 parts by weight or more.

  And while forming the said foaming molding 1 in board shape, the sheet | seat material 2 which apply | coated the anti-mold agent on the single side | surface of the foaming molding 1 was left on the both sides of the width direction of the foaming molding 1 By sticking in the state, it is possible to facilitate the attachment of the foam heat insulating material 1 while enhancing the fungicidal effect.

  Furthermore, a more excellent antifungal effect can be obtained by adhering the foamed molded body 1 and the sheet material 2 with an adhesive mixed with an antifungal agent. In addition, the antifungal agent applied to the sheet material 2 and the antifungal agent mixed with the adhesive include organic nitrogen sulfur compounds, a mixture of triazole compounds and zinc-containing aluminosilicates, or isothiazoline complex salts and zinc-containing aluminosilicates. Preference is given to using a mixture of salts.

On the other hand, in the present invention, instead of the foamed heat insulating material, a powdered cellulose material; a hydrophilic natural polymer material; an insect repellent; and a polyolefin resin are added with a foaming agent. To produce foam insulation by heating mixing and foam molding in
The insect repellent may include at least a pyrethroid (including non-ester) or neonicotinoid insect repellent.

  In addition, when a pyrethroid type is used as the above insect repellent, the amount of the pyrethroid type insect repellent is 100% in order to obtain a sufficient insect repellent effect. It is preferable to be 0.08 to 0.5 parts by weight when the parts are by weight.

  Furthermore, when neonicotinoids are used as the above insect repellents, the cellulosic material and the natural polymer material are combined in order to obtain a sufficient insect repellent effect. When the blended amount is 100 parts by weight, it is preferably 0.02 to 0.5 parts by weight.

  On the other hand, in the present invention, instead of the foam heat insulating material, a foamed cellulose material; a hydrophilic natural polymer material; an antifungal agent containing capsaicin; and a polyolefin resin, It is also possible to produce a foamed heat insulating material by heating and mixing and foaming in a state where is added.

  Further, the amount of capsaicin is 0.1 to 5 parts by weight when the combined amount of the cellulosic material and the natural polymer material is 100 parts by weight in order to obtain a sufficient antifungal effect. Is preferable.

  The effect of the above fungicide, insect repellent or fungicide is more prominent when the blending amount of the cellulosic material and the natural polymer material is larger than the blending amount of the polyolefin resin by weight ratio. Can be made.

  In the present invention, a cellulose-based material, a natural polymer material, and a polyolefin-based resin are used as the main material of the foam heat insulating material, and a pyrithione-based and imidazole anti-fungal agent is added to these main materials to form the foam heat-insulating material. Due to the production, even when the foam heat insulating material is used for a long period of time, it is possible to suppress the occurrence of blue mold, soot mold and the like due to the excellent antifungal effect. Therefore, even when used as a building insulation, there is no concern of causing health damage.

  In addition, by combining the above pyrithione and imidazole antifungal agents, excellent effects can be achieved just by adding a small amount of each antifungal agent. There is no fear that the foaming property is impaired and the yield and heat insulation performance of the foam insulation are deteriorated.

  Furthermore, if a pyrethroid-type or neonicotinoid-type insect repellent is added to the main material of the above-mentioned foamed heat insulating material, it is possible to prevent the function of the foamed heat insulating material from being deteriorated due to damage caused by corrugated beetles. Moreover, if an antifungal agent containing capsaicin is added to the main material of the foam heat insulating material, the bite by the cocoon can be suppressed and the invasion of the cocoon into the room can be prevented.

  In addition, by using the cellulose-based material or the natural polymer material as a main material, the amount of carbon dioxide emitted during production can be suppressed. Furthermore, since the cellulose material and the natural polymer material are used as the main materials, the amount of polyolefin resin used can be suppressed, so that consumption of petroleum resources can be suppressed.

  Therefore, the present invention not only reduces the burden on the environment by utilizing natural materials such as cellulose materials and natural polymer materials, but also prevents mold, insect, Since the foam heat insulating material excellent in functionality capable of improving the function of the cocoon can be provided, the practical utility value of the present invention is very high.

It is a whole perspective view showing the foam heat insulating material in Example 5 of this invention. It is state explanatory drawing showing the state which attached the foam heat insulating material in Example 5 of this invention between joists.

  Next, specific embodiments and preferable conditions for carrying out the present invention will be described.

[Configuration of foam insulation]
First, the foam heat insulating material of the present invention uses, as a main body, a foam molded body mainly composed of a kneaded product of a powdery cellulose material, a hydrophilic natural polymer material, and a polyolefin resin. Further, an antifungal agent, an insecticide or an antifungal agent is used as an additive in the foamed molded article. And innumerable minute cells having a diameter of about 100 to 3000 μm are formed inside the foam heat insulating material.

  On the other hand, when the foamed molded product is molded into a thick plate or rod, a strand-shaped foam having a diameter of 5 to 20 mm is predetermined so that the cells are formed as uniformly as possible inside the foamed molded product. It is preferable to adopt a structure in which they are converged so as to have the cross-sectional shape and fused together. In that case, it is desirable to perform a series of processes up to fusion by employing extrusion molding.

[Powdered cellulosic material]
As the powdery cellulosic material used in the present invention, paper powder, wood powder, rice powder, bamboo powder, straw powder, grass powder, etc. can be mainly used. Other materials can be used if present. In addition, a plurality of types of materials selected from these materials can be used in combination.

[Hydrophilic natural polymer]
As hydrophilic natural polymers used in the present invention, plant polysaccharides such as starch, pectin, konjac mannan, guar gum and gum arabic, or seaweed polysaccharides such as agar, carrageenan and alginic acid can be employed. In addition, microbial polysaccharides and animal polysaccharides may be used as long as they are hydrophilic.

  In addition, for the hydrophilic natural polymer, it is possible to use one material alone or to mix a plurality of materials, but in either case, starch is the main component. It is preferable. This is because the moldability (foamability) of the foamed molded article is improved by utilizing the gelatinization (gelatinization) of starch.

[Polyolefin resin]
As the polyolefin resin used in the present invention, polypropylene, polyethylene, or the like can be mainly used, and it is preferable to select polypropylene when importance is attached to cost and recycling. As for the blending amount, it is preferable that the blending amount of the cellulosic material and the natural polymer material is larger in weight ratio than the blending amount of the polyolefin resin. In addition to the virgin resin, a recycled resin can be used as the polyolefin resin.

[Amount of main ingredients]
Regarding the blending ratio of the cellulosic material and the natural polymer, when the total blending amount of both is 100 weight, the cellulosic material is 20 to 50 weights and the natural polymer is 50 to 80 parts by weight. good. The blending amount of the polyolefin resin is preferably 50 to 150 parts by weight when the blending amount of the cellulosic material and the natural polymer material is 100 parts by weight.

[Anti-mold agent]
As the antifungal agent used in the present invention, a pyrithione antifungal agent and an imidazole antifungal agent can be used in combination. Further, as a pyrithione antifungal agent, bis (2-pyridinethio-1-oxide) zinc or the like can be preferably used. On the other hand, methyl-benzoimidazol-2-ylcarbamate, 2- (1,3-thiazol-4-yl) -1H-benzimidazole, or the like can be suitably used as the imidazole-type antifungal agent.

  And, for the above pyrithione antifungal agent and imidazole antifungal agent, the total amount is 100 parts by weight in combination with the cellulosic material and the natural polymer material in order to obtain a sufficient antifungal effect. In addition, the content is preferably 0.1 to 6 parts by weight. In that case, it is preferable that the amount of each of the pyrithione fungicide and the imidazole fungicide is 0.05 parts by weight or more.

[Insect repellent]
As the insect repellent used in the present invention, pyrethroid or neonicotinoid insect repellent can be used alone or in combination. For pyrethroid insecticides, etofenprox, silafluophene, permethrin, cypermethrin, sifluthrin, bifenthrin and the like can be used as appropriate. Further, when the drug has low solubility in water, the dispersibility of the drug in water can be improved by adding the drug in a wettable state in which the drug is attached to silica.

  Moreover, imidacloprid, acetamiprid, clothianidin can be suitably used as the neonicotinoid insect repellent. In addition, since these chemical | medical agents have comparatively high solubility with respect to water, they can be used in a powder state.

  In addition, for the above pyrethroid insect repellent, in order to obtain a sufficient insect repellent effect, when the combined amount of the cellulosic material and the natural polymer material is 100 parts by weight, in the range of 0.08 to 0.5 parts by weight It is preferable to add.

  In addition, for the above pyrethroid insect repellent, in order to obtain a sufficient insect repellent effect, when the combined amount of the cellulosic material and the natural polymer material is 100 parts by weight, in the range of 0.02 to 0.5 parts by weight It is preferable to add.

[Antidepressant]
As the antifungal agent used in the present invention, those containing capsaicin can be used. In particular, if a capsaicin microcapsule is used, irritation to the human body is suppressed and handling becomes easy. In addition, the amount of capsaicin is 0.1 to 5 parts by weight when the amount of cellulose and natural polymer materials is 100 parts by weight in order to obtain a sufficient antifungal effect. It is preferable to do this.

[Method for producing foam insulation]
Next, a method for producing the foam insulation of the present invention using a plastic extruder will be described. First, as a first step, water-containing cellulosic material, natural polymer material and polyolefin resin, a fungicide, an insecticide or a fungicide (hereinafter referred to as a fungicide, etc.) Are put together through a hopper and kneaded by a screw while heating in a cylinder.

  Then, as a second step, water used as a foaming agent is injected into the material kneaded in the first step under heating and pressure conditions in which water does not evaporate. This is to prevent the danger that the injected water evaporates immediately and the water in the injection tube flows backward. In addition, regarding a foaming agent, not only water but an organic type or an inorganic type foaming agent can also be used.

  Thereafter, as a third step, the water and the kneaded material injected in the second step are kneaded again at high pressure while heating. Finally, as a fourth step, the material kneaded in the third step is pushed out from the nozzle of the extrusion die, and water is evaporated under atmospheric pressure to foam the material.

  In the fourth step, when the kneaded material is extruded from a plurality of nozzles into a strand shape, these are converged before being cooled and solidified, and the whole is lightly pressed. As a result, the strand-shaped foams are fused together, and the foamed molded body is formed into a plate shape or rod shape having a predetermined cross section. Of course, when the foamed molded body is formed into a plate shape, extrusion molding using a T-die can also be employed.

  In addition, in order to obtain an excellent antifungal effect, insect repellent effect, antifungal effect and moldability, in the first step, the cellulosic material and the natural polymer material and the antifungal agent and the like were mixed in advance and pelletized. Things can also be used. This is because the antifungal agent and the like are attached to the cellulose having high water absorption by previously mixing the antifungal agent and the like with the cellulosic material and the natural polymer material.

  In addition, regarding the method of adding an antifungal agent or the like, not only the method of adding together with the main material in the first step, but also the water in which the antifungal agent or the like is dispersed in the kneaded material in the second step or A method of injecting water in which an antifungal agent or the like is dissolved can also be employed.

"Effectiveness test (i)"
Using the foam heat insulating materials of Examples 1 to 5 and Comparative Examples A to D described below, a demonstration test (i) of the effect of the present invention was performed. In this test, Prime Polypro (registered trademark) of Prime Polymer was used for polypropylene. In addition to this polypropylene, R-PO (recycled polyolefin) composed of polypropylene (55 to 65 wt%), polyethylene (30 to 40 wt%) and polystyrene (1 to 5 wt%) was used.

Furthermore, powder having an average particle size of 30 to 200 μm was used as the paper powder. The fungicides include pyrithione-based bis (2-pyridinethio-1-oxide) zinc (hereinafter referred to as ZPT) shown in [Chemical Formula 1] below, and imidazole-based methyl-benzimidazole-2 shown in [Chemical Formula 2] below. -Iilcarbamate (hereinafter referred to as BCM) and imidazole 2- (1,3-thiazol-4-yl) -1H-benzimidazole (hereinafter referred to as TBZ) shown in [Chemical Formula 3] were used. In addition, scallop shell calcined calcium was used as calcium hydroxide.

Next, a method for examining the presence or absence of mold resistance in this test will be described. In this test, the following method, which can obtain results in a shorter period of time, was adopted with reference to a method based on the JIS standard (JIS Z 2911 ²⁰¹⁰ ).

[1] Sterilize the working space with an ethanol solution. [2] A potato-dextrose agar medium (PDA medium) diluted in a sterilized petri dish with a depth of 90 mm is placed and hardened. [3] A plastic net cut to a size slightly smaller than the petri dish is laid on the PDA medium. [4] The test specimen is introduced onto the plastic net in the petri dish. [5] About 1 to 2 ml of the prepared spore suspension is applied to the test specimen introduced into the petri dish on the front of the test specimen using a pipette or a spray bottle, and the petri dish is covered. [6] The petri dish with the lid is introduced into a constant temperature and humidity chamber with a temperature of 29 ° C and a humidity of 95%, and the presence or absence of mold is confirmed every week (QTM-D3 rapid heat conduction made by Kyoto Electronics is used for measurement). Use a rate meter). [7] The test results are evaluated based on the following criteria.

  In this test, molds include Aspergillus niger van Tieghem, Penicillium funiculosum Thom, Rhizopus oryzae Went et Prinsen-Geerligs, Gliocladium virens Miller, Giddens & Foster (Gliocladium), Chaetoze ex Penicillium glabrum, Penicillium citrinum, Mucor sp., Filamentous fungi, and Alternaria alternate (Suscabi) were prepared.

"Example 1"
The foam heat insulating material of Example 1 will be described. In this Example 1, paper powder (35 parts by weight), starch (65 parts by weight), polypropylene (52 parts by weight), R-PO (23 parts by weight), ZPT (0.2 parts by weight), BCM (0.2 parts by weight) Part) and water (20 parts by weight), and kneaded these materials were extruded by water foaming to produce a foamed molded article. As a result, it was confirmed that it had excellent moldability and antifungal properties.

"Example 2"
In Example 2, a foamed molded article was produced by changing the blending amount of ZPT to 0.1 parts by weight and the blending amount of BCM to 0.3 parts by weight among the blending amounts of Example 1 above. As a result, it was confirmed that it had excellent moldability and antifungal properties as in Example 1.

"Example 3"
In Example 3, TBZ was used as an antifungal agent, and a foamed molded article was prepared with the compounding amount of the antifungal agent being ZPT (0.1 part by weight), BCM (0.2 part by weight), and TBZ (0.2 part by weight). . The other conditions are the same as in Example 1. As a result, it was confirmed that it had excellent moldability and antifungal properties similar to those of Example 1.

Example 4
In Example 4, a foamed molded article was prepared by changing the blending amount of Example 3 above to 0.25 parts by weight of ZPT, 0.1 part by weight of BCM, and 0.1 part by weight of TBZ. . As a result, it was confirmed that it had excellent moldability and fungicidal properties similar to those of Example 3.

"Example 5"
In Example 5, as shown in FIG. 1, a sheet material 2 made of a PET non-woven fabric in which a mold preventive agent (organic nitrogen sulfur-based compound) is applied to one side of a foam molded body 1 produced in a board shape is used as a foam molded body 1. Attached in a state where the surplus portions 21 and 21 are left on both sides in the width direction. This is because, as shown in FIG. 2, the foam insulation is easily attached between the joists N and N by hitting the surplus portions 21 and 21 of the sheet material 2 to the joists N and N.

  Further, in Example 5, an organic nitrogen sulfur-based compound was mixed as a mold preventive agent with the vinyl acetate adhesive used for adhering the foamed molded body 1 and the sheet material 2. And when it tested about the foam heat insulating material which consists of the said structure, it has confirmed that it had the outstanding moldability and antifungal property.

  In addition, although explanation as an example is omitted, the same applies when a mixture of a triazole compound and a zinc-containing aluminosilicate or a mixture of an isothiazoline complex salt and a zinc-containing aluminosilicate is used as the organic nitrogen sulfur compound. The effect was confirmed.

"Comparative Example A"
In Comparative Example A, a foam-molded article was produced by changing only the fungicide to calcium hydroxide (0.3 parts by weight) without changing the main materials of Examples 1 to 5. As a result, although the moldability was good, the growth of mycelium was confirmed in the range of more than 1/3 of the test specimen.

"Comparative Example B"
In Comparative Example B, a foamed molded article was produced by changing the amount of calcium hydroxide used as a fungicide in Comparative Example A to 5 parts by weight. As a result, the moldability deteriorated, and a sufficient effect was not exerted with respect to the antifungal property, and the mycelial growth was partially confirmed.

"Comparative Example C"
In Comparative Example C, a foamed molded article was produced by changing the antifungal agent only to the pyrithione ZH antifungal agent (0.5 parts by weight) without changing the main materials of Examples 1 to 5. As a result, although the moldability was good, the growth of mycelia was partially confirmed for the antifungal property.

"Comparative Example D"
In Comparative Example D, a foam-molded article was produced by changing the antifungal agent only to the imidazole BM antifungal agent (0.5 parts by weight) without changing the main materials of Examples 1 to 5. As a result, although the moldability was good, the growth of mycelia was partially confirmed for the antifungal property.

[Summary of Verification Test (i)]
The contents of the above test results are summarized in [Table 2] below. As can be seen from this [Table 2], by adopting the configuration of the present invention, it is possible to produce a foam heat insulating material having excellent antifungal properties without impairing the moldability of the foam molded article. Become.

"Effectiveness test (ii)"
Using the foam heat insulating materials of Examples 1 to 5 and Comparative Example A described below, a demonstration test (ii) of the effect of the present invention was performed. In this test, paper powder used as a cellulosic material, starch used as a hydrophilic natural polymer, polypropylene resin used as a polyolefin resin, and R-PO were the same as those used in test (i).

Insect repellents include pyrethroid-based repellents such as 2- (4-ethoxyphenyl) -2-methylprovir-3-phenoxybenzyl ether (generic name: etofenprox) represented by the following [Chemical Formula 4], and 4-Ethoxyphenyl [3- (4-fluoro-3-phenoxyphenyl) provir] dimethylsilane (generic name: silafluophene) shown in [Chemical Formula 5] was used.

  In addition, the pyrethroid insect repellent includes etofenprox wettable powder with excellent dispersibility in water (etofenprox 20%, organic solvent 32%, mineral fine powder 48% of amorphous silica), And silafluorene wettable powder (silafluophene 20%, organic solvent / mineral fine powder 80%) were used.

In this test, as a neonicotinoid insect repellent, 1- (6-chloro-3-pyridylmethyl) -N-nitroimidazolidin-2-ylideneamine (generic name: imidacloprid) shown in the following [Chemical Formula 6], and (E) -1- (2-chloro-1,3-thiazol-5-ylmethyl) -3-methyl-2-nitroguanidine (generic name: clothianidin) shown in the following [Chemical Formula 7], and the following [Chemical Formula 8] (E) -N ¹ -[(6-chloro-3-pyridyl) methyl] -N ² -cyano-N ¹ -methylacetamidine (generic name: acetamiprid) shown in FIG.

  Next, a method for examining the presence or absence of insect repellent in this test will be described. In this test, foamed molded articles prepared by adding the above insect repellents (Examples and Comparative Examples below) were cut into length 10 cm × width 3 cm × thickness 2 cm to obtain test specimens. And this test body was left on the soil surface in the field for 3 months, and especially the state of food damage to the rubber bug was observed. The evaluation criteria are “◎” when there was no damage, “O” when there was slight damage, and “X” when there was damage until penetration.

"Example 1"
The foamed molded product of Example 1 will be described. In Example 1, paper powder (35 parts by weight), starch (65 parts by weight), polypropylene (52 parts by weight), R-PO (23 parts by weight), etofenprox (0.08 parts by weight), water (20 parts) Part by weight) was used, and a kneaded mixture of these materials was extruded by water foaming to produce a foamed molded product. As a result, it was confirmed that they had good moldability and insect repellent properties although there was some damage. In addition, the compounding quantity of the said etofenprox represents the quantity of only the chemical | medical agent in a wettable powder.

"Example 2"
In Example 2, a foamed molded article was produced by changing the insect repellent of Example 1 to silafluophene (0.08 parts by weight). As a result, it was confirmed that it had good moldability and insect repellent properties as in Example 1. In addition, the compounding quantity of the said silafluophene represents the quantity of only the chemical | medical agent in a wettable powder.

"Example 3"
In Example 3, a foamed molded article was produced by changing the insect repellent of Example 1 to powdered imidacloprid (0.04 parts by weight). As a result, it was confirmed that it had good moldability and insect repellent properties as in Examples 1 and 2.

Example 4
In Example 4, a foam-molded article was produced by changing the insect repellent of Example 1 to powdery clothianidin (0.04 parts by weight). As a result, it was confirmed that the test specimen did not show any food damage and had good moldability similar to those of Examples 1 to 3 and insect repellent properties of Examples 1 to 3 and above.

"Example 5"
In Example 5, a foamed molded article was prepared by changing the insect repellent of Example 1 to powdery acetamiprid (0.04 parts by weight). As a result, it was confirmed that they had good moldability and insect repellent properties as in Examples 1 to 3 above.

"Comparative Example A"
In Comparative Example A, a foamed molded article was produced without using an insect repellent (other blending ratios were the same as in Example 1). As a result, although the moldability was good, a sufficient effect was not observed with respect to insect repellent properties, and a level of damaging damage penetrating the test specimen was observed.

"Comparative Example B"
In Comparative Example B, a foamed molded article was produced by changing the compounding amount of the insect repellent (Etofenprox) of Example 1 to 0.025 polymerization part. As a result, although the moldability was good, a sufficient effect was not observed with respect to insect repellent properties, and a level of damaging damage penetrating the test specimen was observed.

"Comparative Example C"
In Comparative Example C, a foamed molded article was produced by changing the compounding amount of the insect repellent (imidacloprid) of Example 3 to 0.025 parts by weight. As a result, although the moldability was good, a sufficient effect was not observed with respect to insect repellent properties, and the level of damage that the test specimen penetrated was observed.

[Summary of Verification Test (ii)]
The contents of the above test results are summarized in [Table 3] below. As can be seen from this [Table 3], by adopting the configuration of the present invention, it is possible to produce a foam heat insulating material excellent in insect proofing properties without impairing the moldability of the foam molded article. .

"Effectiveness test (iii)"
A demonstration test (iii) of the effect of the present invention was performed using the foam heat insulating material of Example 1 described below. In this test, paper powder used as a cellulosic material, starch used as a hydrophilic natural polymer, polypropylene resin used as a polyolefin resin, and R-PO were the same as those used in test (i). As the antifungal agent, a microcapsule of N-nonanoylvanillylamide (NVA) which is a kind of capsaicin was used.

  Next, a method for examining the presence or absence of antifungal properties in this test will be described. In this test, a foamed molded product (Example below) prepared by adding the antifungal agent was cut into a length of 10 cm, a width of 3 cm and a thickness of 2 cm to obtain a test body. Then, this specimen was left in a case containing wrinkles to observe the state of eating damage.

"Example 1"
The foamed molded product of Example 1 will be described. In Example 1, paper powder (35 parts by weight), starch (65 parts by weight), polypropylene (52 parts by weight), R-PO (23 parts by weight), capsaicin (0.5 parts by weight), water (20 parts by weight) ), And a kneaded mixture of these materials was extruded by water foaming to produce a foamed molded product. As a result of the test, it was confirmed that although there was some corrosion damage, it had good moldability and antifungal properties.

  The present invention is generally configured as described above, but various modifications can be made within the scope of the claims. For example, the use of the foamed molded product is not limited to a heat insulating material for building, but is foamed. It can also be used as a cushioning material for packaging in which a resin material is used, an impact absorbing member of a velmet, a buoyancy material such as a life jacket, and any of them belongs to the technical scope of the present invention.

  In recent years, there has been a great demand for foam insulation as a building material, and in particular, not only functionality but also ecological products are required. Under such circumstances, the present invention can be achieved by adding a small amount of fungicide, insect repellent or fungicide, which has been a drawback of environmentally friendly cellulosic materials. Since it is a technology with excellent usability that can be solved, its industrial utility value is very high.

1 Foam molded body 2 Sheet material
21 Surplus part N Jouda

Claims (11)

A heat insulating material having a foam molded body (1) as a main body, wherein the foam molded body (1) comprises a powdery cellulose material; a hydrophilic natural polymer material; an antifungal agent; The resin is produced by heat-mixing / foam molding in a state where a foaming agent is added, and the antifungal agent includes at least a pyrithione and imidazole antifungal agent ,
Further, a sheet material (2) coated with a fungicide is pasted on one side of the foam molded body (1) formed in a board shape in a state where surplus portions are left on both sides in the width direction of the foam molded body (1). A foamed heat insulating material containing cellulose, characterized by being worn . Foamed molded article (1) and sheet material (2), the cellulose-containing foam insulation that claim 1, wherein the adhesively bonded mixed with fungicides. The antifungal agent applied to the sheet material (2) and the antifungal agent mixed with the adhesive is an organic nitrogen sulfur compound, or a mixture of triazole compound and zinc-containing aluminosilicate, or isothiazoline complex salt and zinc 3. The cellulose-containing foam insulation according to claim 2 , which is a mixture of aluminosilicates. A heat insulating material having a foam molded body (1) as a main body, wherein the foam molded body (1) comprises a powdery cellulose material; a hydrophilic natural polymer material; an insect repellent; and a polyolefin resin. And is made by heat mixing and foam molding with a foaming agent added,
A cellulose-containing foam insulation, wherein the insect repellent contains at least a pyrethroid or neonicotinoid insect repellent. 5. The cellulose-containing composition according to claim 4, wherein the amount of the pyrethroid insect repellent is 0.08 to 0.5 parts by weight when the amount of the cellulose material and the natural polymer material is 100 parts by weight. Foam insulation. Amount of neonicotinoid insecticide, when the amount of the combined cellulosic materials and natural polymeric materials is 100 parts by weight, according to claim 4, characterized in that 0.02 to 0.5 parts by weight Cellulose-containing foam insulation.   A heat insulating material having a foam molded body (1) as a main body, wherein the foam molded body (1) comprises: a powdery cellulosic material; a hydrophilic natural polymer material; and an antifungal agent containing capsaicin; A cellulose-containing foam heat insulating material produced by heat-mixing and foam-molding a polyolefin-based resin with a foaming agent added. The cellulose-containing foam insulation according to claim 7 , wherein the amount of capsaicin is 0.1 to 5 parts by weight when the amount of the cellulose-based material and the natural polymer material is 100 parts by weight. Wood. A method for producing a heat insulating material having a foam molded body (1) as a main body, the foam molded body (1) comprising: a powdery cellulosic material; a hydrophilic natural polymer material; The polyolefin resin is heated and foamed with a foaming agent added ,
As the antifungal agent, at least pyrithione and imidazole antifungal agents, the total amount of which is 0.1 to 6 parts by weight when the combined amount of the cellulose material and the natural polymer material is 100 parts by weight. And add
Further, a method for producing a cellulose-containing foam heat insulating material, which comprises subjecting a cellulosic material, a natural polymer material and an antifungal agent to a premixed pellet to add a polyolefin resin and water to perform foam molding . The amount of each of the pyrithione antifungal agent and the imidazole antifungal agent is 0.05 parts by weight or more when the total amount of the cellulosic material and the natural polymer material is 100 parts by weight. The method for producing a cellulose-containing foam heat insulating material according to claim 9 . The method for producing a cellulose-containing foam heat insulating material according to claim 9 or 10 , wherein the blending amount of the cellulosic material and the natural polymer material is larger by weight ratio than the blending amount of the polyolefin resin.