JP2019157028A - Resin composition, molded body, and method for producing resin composition - Google Patents

Abstract

To provide a resin composition colored by a simple method using a plant-derived raw material whose utilization method is sought as a social request.SOLUTION: A resin composition 10A includes a colored plant powder 12 obtained by coloring a plant powder, which is made by pulverization of a plant, with a water-soluble colorant, and a resin 11.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a resin composition, a molded body, and a method for producing a resin composition.

  In many cases, the stems, leaves, roots, and the like of fruit vegetables are usually treated as waste after the harvest. For example, after harvesting tomato, which is a fruit, a large amount of stems and leaves are disposed of unused as agricultural waste. Tomato stems and leaves are not suitable for combustion because of the small amount of energy associated with combustion, and it takes time to bury them in soil and compost them.

  In addition, plants such as bamboo, which grow fast but have a hollow portion in the stem, are less useful in recent years because they do not easily exhibit uniform strength like timber. The treatment of plant-derived waste is inefficient and its amount tends to increase, which has become a social problem in recent years. That is, the use of these herbaceous plants has decreased, making it difficult to develop the same uses as woody plants.

  However, such a herbaceous plant-derived waste retains the unique fine tissue of the plant, and is expected to be industrially available due to the high hydrophilicity inherent in the plant. A technique for finely pulverizing stems and leaves, which are residues of tomatoes, etc., and adding them to a synthetic resin to develop flame retardancy has been studied (see Patent Document 1).

JP 2011-241261 A

  As a social request, a method for utilizing plant-derived materials is required.

  An object of the present invention is to provide a resin composition colored by a simple method using plant-derived raw materials, a molded product thereof, and the like.

  The resin composition according to the present invention includes a colored vegetable powder obtained by coloring a vegetable powder obtained by powdering a plant with a water-soluble colorant, and a resin.

  In the resin composition, the plant is preferably a herbaceous plant.

  The said resin composition WHEREIN: It is preferable that the said plant is a stem part of a herbaceous plant, Comprising: It is a stem part which has a cavity.

  In the resin composition, the resin is preferably a thermoplastic resin or a thermosetting resin.

  In the resin composition, the resin preferably has a melting point or thermosetting temperature of less than 300 ° C.

  The said resin composition WHEREIN: It is preferable that the content rate of the said vegetable powder in the said resin composition is 50 mass% or less.

  In the resin composition, the vegetable powder is preferably sized to pass through a sieve having an opening of 500 μm.

  In the resin composition, the plant is preferably tomato or bamboo.

  Moreover, the molded object which concerns on this invention consists of what shape | molded one of the said resin compositions.

  Moreover, the manufacturing method of the resin composition which concerns on this invention is a manufacturing method of the resin composition in any one of the above, Comprising: The powdering process which pulverizes a plant and makes it a vegetable powder, Coloring the said vegetable powder And a coloring process for producing colored vegetable powder, and a mixing process for mixing the colored vegetable powder and the resin.

  ADVANTAGE OF THE INVENTION According to this invention, the resin composition colored by the simple method using the plant-derived raw material, its molded object, etc. can be provided.

Flow chart showing an example of coloring procedure of plant-derived powder Flow chart showing an example of mixing procedure of plant-derived powder and resin Appearance photograph of resin composition of Example 1 containing plant-derived powder colored with water-soluble dye Optical micrograph of resin composition of Example 2 containing plant-derived powder colored with water-soluble dye Appearance photograph of resin composition of Example 2 containing plant-derived powder colored with water-soluble dye Appearance photograph of resin composition of Example 3 containing plant-derived powder colored with water-soluble pigment Appearance photograph of resin composition of Example 4 containing plant-derived powder colored with water-soluble pigment Photograph showing difference in resin composition between Example 4 and Example 4-1 containing plant-derived powder colored with water-soluble dye and water-soluble pigment Appearance photograph of resin composition of Example 5 containing colored plant-derived powder Photograph comparing the staining properties of α-cellulose of Comparative Example 1 and tomato-derived powder of Example 2 Appearance photograph of resin composition of Example 6 containing plant-derived powder colored with water-soluble chemicals Photo of appearance of resin composition containing colored plant-derived powder

(Plant-derived powder)
The plant-derived powder is obtained by pulverizing and pulverizing a plant. As the plant, it is preferable to use a herbaceous plant, which is a plant having stems and leaves that easily infiltrate a water-soluble colorant. Compared to woody plants, herbaceous plants have a soft tissue and contain a large amount of water in the cells because the stems are self-sustaining. Therefore, compared to woody plants, herbaceous plants are easy to process into a state containing many fine pores by drying. Among herbaceous plants, it is preferable to use plant stems after harvesting fruits or plant stems that are difficult to be used as structural materials due to the hollow structure. Herbaceous plants often have very different cellular structures at the center and epidermis of the stem, called the pith, but for example, when the plant grows and bears fruit, as represented by tomatoes, It is preferable that disappears and becomes a cavity. Further, it is preferable that the stem has a hollow structure during the growth process, such as bamboo. As a result, mechanical crushing by an external force is facilitated, and only the portion where the stem cells that were heterogeneous during growth are almost homogeneous can be used. Therefore, as a target of plant-derived powder, it is preferable to use a stem portion rather than a leaf or root portion having a cell tissue greatly different from that of a stem among herbaceous plants.

  In order to produce the plant-derived powder, a pulverizer using a general mechanical force can be used. It is preferable to use the stem part of a herbaceous plant, and it is preferable to have a cavity in the stem part. The cavity of the stem portion is formed, for example, when the plant is fruited or during the growth process of the plant. The stems of these plants are easily deformed by applying force from the outside, and can be crushed or crushed.

  As an external force, a compressive force, a shear force, a friction force, an impact force, or the like can be used, and a general mechanical grinding method can be used. As a mechanical pulverization method, various ball mills (rolling ball mill, vibration ball mill, planetary ball mill, etc.), medium agitating mill, airflow pulverizer, and the like are used.

  Further, the plant-derived powder may be pulverized (pulverized) using an underwater crusher (for example, a homogenizer) in a state of being immersed in an aqueous solvent such as water. At this time, chlorophyll, sugar and the like contained in the herbaceous plant are eluted, but there is no influence on the present invention.

  The pulverization of the plant-derived material may be divided into a plurality of stages and apparatuses so that the average particle diameter gradually decreases. For example, the stem may be coarsely pulverized to a size of about several centimeters, and the coarsely pulverized product may be further pulverized (pulverized) to a few hundred microns.

  The plant-derived powder may be appropriately classified with a sieve or the like. The shape and average particle size of the plant-derived powder are not particularly limited as long as the object of the present invention is not impaired. However, in order to perform uniform coloring and achieve uniform mixing into the resin in a short time, the mesh has an opening of 500 μm. A size passing through a sieve is preferred. The pulverized powder does not necessarily have a spherical shape reflecting the cell structure, but can be mixed with a resin if the minor axis is 500 μm or less. In addition, when pulverizing to the nano range where cellulose, which is the main component of the plant-derived powder, can be separated, the herbaceous plant-derived structure collapses, so that the adhesion of water-soluble colorants is reduced and it is difficult to perform the expected coloring. Therefore, it is not preferable. An example of the coloring procedure of the plant-derived powder of the present invention is shown in FIG. As shown in FIG. 1, a plant-derived powder is prepared from a herbaceous plant (stem) (S1). Next, the plant-derived powder is immersed in an aqueous colorant solution (S2). In addition, the density | concentration of coloring agent aqueous solution is arbitrary and is set suitably according to the objective. Next, the plant-derived powder immersed in the aqueous colorant solution is filtered (S3). After filtration, the recovered solid is dried (S4). After drying, a colored plant-derived powder is obtained (S5).

  It is possible to produce a powder while maintaining the original cell wall structure of a plant by mechanically crushing herbaceous plants with cavities inside the stem in a mature state among plants, by applying mechanical force from the outside. it can. That is, a vegetable powder can be produced while maintaining the structure of a herbaceous plant with a size that can maintain the hydrophilicity inherent to the plant.

(Water-soluble colorant)
A water-soluble colorant is a material that can be subjected to water-soluble coloring. Examples of the water-soluble colorant include water-soluble dyes and water-soluble pigments. The dye is colored at the chemical molecular level, and the pigment is in a state where fine particles are dispersed. However, the water-soluble pigment is provided with a fine particle of a surfactant or pigment so that it can be dispersed in water, and can be treated in the same manner as a water-soluble dye in the present invention. Being water-soluble, it easily infiltrates into plant-derived powder. Therefore, it is desirable to dilute the water-soluble colorant with water or the like so as to easily infiltrate the plant-derived powder. The herbaceous plant-derived powder has good hydrophilicity and can be uniformly colored due to its high hydrophilicity. Plant-derived powders obtained by mechanical grinding often have a white or light brown color, but water-soluble colorants infiltrate the surface of these powders and pores in the fine tissue derived from the cell walls. Therefore, the target color can be expressed.

  Since water-soluble pigments are easily affected by the size of the pigment and the surfactant, the degree of coloring may be weaker than that of water-soluble dyes. Even if the water-soluble pigment is pulverized in advance and the pigment is refined, the present invention is not affected. Alternatively, the colored powder may be dried by heat or the like, and dipped in a water-soluble pigment again to thicken the color.

  In order to immerse the plant-derived powder in the water-soluble colorant, the excess colorant may be separated and collected by sprinkling from above the powder, or sprayed in a mist form. Moreover, when the dispersion | variation in the water-soluble colorant by gravity is worrisome, it is good to stir and mix a water-soluble colorant and plant origin powder for a fixed time.

  The water-soluble colorant also includes a water-soluble chemical aqueous solution that is an aqueous solution using a water-soluble chemical. That is, the water-soluble chemical aqueous solution itself is not used for coloring purposes, but when the plant-derived powder is infiltrated into the water-soluble chemical aqueous solution, a part of the cellulose is dehydrated and the plant-derived powder becomes black. Can be colored. Examples of water-soluble chemicals include sulfuric acid, hydrochloric acid, and ammonium phosphate aqueous solution. Furthermore, the reaction proceeds by heating, and the color can be changed in a shorter time.

  Carbon particles that are generally added to blacken the resin can also be used as the water-soluble colorant, but the water-soluble chemical aqueous solution changes the color of the surface part of the plant-derived powder itself as compared with the carbon particles. Therefore, it is difficult for pigment particles (carbon particles) to fall off during resin molding.

(Production of composition)
The colored plant-derived powder is dried and mixed with the resin. Since the plant-derived powder is colored with a water-soluble colorant, it is desirable to heat and dry at a temperature at which moisture evaporates. In addition, when the plant-derived powder is altered by heat, vacuum drying can be used. Furthermore, there is no problem even if heat drying and vacuum drying are used in combination. The dried colored plant-derived powder is mixed with a resin to form a composition. As the resin used for the composition, for example, a thermoplastic resin or a thermosetting resin can be used.

  As the thermoplastic resin, resins such as polypropylene and polystyrene can be used, and they can be heated and mixed as long as the cellulose contained in the plant-derived powder is not greatly damaged by heating. In general, cellulose is blackened by heating at 300 ° C. or higher. Therefore, it is preferable to mix by heating at less than 300 ° C. Therefore, it is desirable that the thermoplastic resin used has a melting point of less than 300 ° C. When the melting point is 300 ° C. or higher, when the thermoplastic resin is melted and molded, the colored plant-derived powder becomes black and the colored meaning may be lost.

  The mixing method is not particularly limited, but a general method of mixing a resin and an inorganic material can be used. A known kneading apparatus such as a commercially available stirrer, an extruder (uniaxial, biaxial, etc.) or a lab plast mill is used. In order to perform homogeneous mixing, it is preferable to mix by softening or dissolving the resin by heating. FIG. 2 shows an example of a mixing procedure of a resin composition using a thermoplastic resin. As shown in FIG. 2, first, the resin (thermoplastic resin) is heated and softened by a kneading apparatus (S11). Next, a colored plant-derived powder is added to the softened thermoplastic resin (S12). Thereafter, the thermoplastic resin and the plant-derived powder are kneaded (S13), and the kneaded product is formed into a strand using an extruder (S14). The kneaded material formed into a strand is pelletized by a pelletizer (S15). By such a procedure, a pelletized resin composition can be obtained.

  The mixing ratio of the resin and the plant-derived powder largely depends on the mixing method, but is not particularly limited as long as uniform mixing can be performed. However, considering that the resin is generally in a liquid state at the time of mixing and the plant-derived powder is solid, it is considered that the plant-derived powder is 50% by mass or less to facilitate mixing. If the solid plant-derived powder exceeds 50% by mass, it is considered that the load on the equipment to be mixed increases.

  Similarly, for the thermosetting resin, the thermosetting temperature of the thermosetting resin is less than 300 ° C, and it is preferable to mix by heating at less than 300 ° C. In addition, a resin that promotes curing by mixing two or more liquids can be used as long as the curing temperature is less than 300 ° C.

  Commercially available stirrers and mixers can also be used for the thermosetting resin. Moreover, when utilizing a hardening accelerator etc., it is preferable to perform a defoaming process under vacuum.

  For molding the composition using the thermosetting resin, a general molding method of the composition can be used. For example, a resin containing plant-derived powder can be molded while being filled and pressurized before curing. Moreover, it can also shape | mold into plate shape with a roller etc. before hardening. Applying pressure at the time of molding can reduce pores remaining in the composition, which is effective in increasing the strength of the molded body.

(Other ingredients)
In the resin composition, as long as the purpose of the present invention is not impaired, a compatibilizer, a heat stabilizer, a plasticizer, an ultraviolet absorber, an antioxidant, a release agent, an antibacterial agent, an antifungal agent, You may utilize with various additives, such as a foaming agent.

  Hereinafter, the present invention will be described in more detail based on examples. In addition, this invention is not limited at all by these Examples.

[Example 1]
To a solution of 2.4 g of red ink (SPN-100A # 11 made of platinum) and 72.6 ml of distilled water as a water-soluble dye in 5 g of commercially available bamboo powder (“Yumetake” manufactured by Yaki Sangyo) The whole bamboo powder was colored while being immersed and stirred. The excess coloring solution was separated and removed by vacuum filtration using a membrane filter (SCWP09025 manufactured by Millipore) having a pore size of 8 μm. The bamboo powder dyed red with the obtained water-soluble dye was treated with an electric dryer at 100 ° C. for 5 hours.

  4 g of the bamboo powder (plant-derived powder) colored in red and 36 g of granular polypropylene (PMA20V manufactured by Sun Allomer), which is a thermoplastic resin, were mixed in a lab plast mill (4C150-01 manufactured by Toyo Seiki). Mixing was carried out at 180 ° C. for 5 minutes at a rotational speed of 10 rpm, 5 minutes at 50 rpm, and 15 minutes at 150 rpm.

  The appearance of the obtained composition is shown in FIG. As shown in FIG. 3, in the obtained resin composition 10, red bamboo powder is uniformly dispersed in polypropylene, and the polypropylene is colored red. Colored vegetable powder (bamboo powder colored red with a water-soluble dye): polypropylene = 5: 95 (w / w).

  The composition was cut into a lump shape and formed into a plate shape having a thickness of about 2 mm at 180 ° C. and a pressure of 1 MPa using a heating press (C type manufactured by Iwaki Kogyo Co., Ltd.).

  The obtained molded product was free from scratches, cracks and warpage, and was a good molded product. There is no color change accompanying molding, and the red molded body can be processed into an arbitrary shape.

[Example 2]
After harvesting Momotaro and Tomato, the dried stems should be coarsely pulverized with a coarse pulverizer (SDR-14 manufactured by Aikawa Tekko Co., Ltd.) and further pulverized with a fine pulverizer (MKZA10-20 manufactured by Masuko Sangyo Co., Ltd.). A tomato-derived powder was prepared. This tomato-derived powder was subjected to vibration classification with a 500 μm sieve, and a powder of 500 μm or less was recovered. 5 g of the obtained powder was immersed in a solution in which 2.4 ml of red ink (SPN-100A # 11 made of platinum) as a water-soluble dye was mixed with 72.6 ml of distilled water, and the whole tomato powder was colored. The excess coloring solution was separated and removed by vacuum filtration using a membrane filter (SCWP09025 manufactured by Millipore) having a pore size of 8 μm. The tomato powder dyed red with the water-soluble dye obtained was treated with an electric dryer at 100 ° C. for 5 hours.

  4 g of the obtained tomato powder colored in red and 36 g of granular polypropylene (PMA20V manufactured by Sun Allomer), which is a thermoplastic resin, were mixed in a lab plast mill (4C150-01 manufactured by Toyo Seiki). It was carried out at 180 ° C. for 5 minutes at 10 rpm, 5 minutes at 50 rpm, and 15 minutes at 150 rpm.

  The optical microscope structure of the obtained composition is shown in FIG. Red tomato powder (colored plant-derived powder) is uniformly dispersed in polypropylene. The appearance of the resin composition 10A of Example 2 is polypropylene colored red as shown in FIG. Colored vegetable powder (tomato powder colored red with water-soluble dye): polypropylene = 5: 95 (w / w).

  The composition was cut into lumps and injection molded by an injection molding machine under conditions of a molding temperature of 185 ° C., a mold temperature of 40 ° C., and an injection speed of 70 mm / s.

  The obtained molded body was free from scratches, cracks and warpage, and was a good molded body. There is no significant change in color associated with molding, and a red molded body can be processed into an arbitrary shape. Further, a thin layer of polypropylene is formed on the surface of the injection molded body.

Example 3
In a mixture of 5 g of commercially available bamboo powder (“Yumetake” manufactured by Yaki Sangyo Co., Ltd.) and 2.4 ml of fluorescent pink ink (PUSR-80 peach made by Mitsubishi Pencil) as a water-soluble pigment and 72.6 ml of distilled water Immersion was done and the entire bamboo powder was colored. The excess coloring solution was separated and removed by vacuum filtration using a membrane filter (SCWP09025 manufactured by Millipore) having a pore size of 8 μm. The bamboo powder dyed pink with the water-soluble pigment thus obtained was treated with an electric dryer at 100 ° C. for 5 hours.

  0.5g of the resulting pink powdered bamboo powder is mixed with 9.5g of epoxy resin (Devcon ET made by IWA Performance Polymers & Fluids Japan) which is a two-component mixed thermosetting resin. It was filled in and cured at room temperature.

  The appearance of the obtained composition is shown in FIG. As shown in FIG. 6, in the resin composition 10B of Example 3, the bamboo powder colored pink is dispersed in a highly transparent epoxy resin, and color is developed. Colored vegetable powder (bamboo powder colored pink with a water-soluble pigment): epoxy resin = 5: 95 (w / w).

  When the molded body of the obtained composition is irradiated with an ultraviolet LED (UV-LED) light, light is emitted slightly in a dark room. It was confirmed that the fluorescent component of the water-soluble pigment was evenly adsorbed on the bamboo powder and emitted light. However, it is considered that the fluorescent component that develops a pink color is weak in light emission at the wavelength of the UV-LED light used.

Example 4
After harvesting Momotaro and Tomato, the dried stems should be coarsely pulverized with a coarse pulverizer (SDR-14 manufactured by Aikawa Tekko Co., Ltd.) and further pulverized with a fine pulverizer (MKZA10-20 manufactured by Masuko Sangyo Co., Ltd.). A tomato-derived powder was prepared. This tomato-derived powder was subjected to vibration classification with a 500 μm sieve, and a powder of 500 μm or less was recovered. 5 g of the obtained powder is immersed in a solution obtained by mixing 2.4 ml of fluorescent green ink (PUSR-80 green manufactured by Mitsubishi Pencil) and 72.6 ml of distilled water as a water-soluble pigment. gave. The excess coloring solution was separated and removed by vacuum filtration using a membrane filter (SCWP09025 manufactured by Millipore) having a pore size of 8 μm. The tomato powder dyed with the obtained water-soluble pigment was treated with an electric dryer at 100 ° C. for 5 hours.

  0.5g of the green colored tomato powder obtained is mixed with 9.5g of epoxy resin (Devcon ET made by IWA Performance Polymers & Fluids Japan) which is a two-component thermosetting resin. It was filled in and cured at room temperature.

  The appearance of the obtained composition is shown in FIG. As shown in FIG. 7, in the resin composition 10 </ b> C of Example 4, the tomato-derived powder colored green in color is dispersed in a highly transparent epoxy resin and is colored. Colored vegetable powder (tomato powder colored green with a water-soluble pigment): epoxy resin = 5: 95 (w / w).

  When the obtained molded body 10C of the composition of Example 4 was irradiated with an ultraviolet LED (UV-LED) light, it was confirmed that light was strongly emitted in a dark room. It was confirmed that the fluorescent component of the water-soluble pigment was evenly adsorbed on the tomato-derived powder and emitted light. In addition, when compared with the molded product 10C-1 composed of the composition of Example 4-1 in which the tomato powder is colored the same green with a water-soluble dye, although there is no significant difference in color under visible light as shown in FIG. -The difference in light emission by LED light was clear. In addition, it is coloring vegetable powder of Example 4-1 (tomato powder colored green with water-soluble dye): epoxy resin = 5: 95 (w / w).

Example 5
After harvesting Momotaro and Tomato, the dried stems should be coarsely pulverized with a coarse pulverizer (SDR-14 manufactured by Aikawa Tekko Co., Ltd.) and further pulverized with a fine pulverizer (MKZA10-20 manufactured by Masuko Sangyo Co., Ltd.). A tomato-derived powder was prepared. This tomato-derived powder was subjected to vibration classification with a 500 μm sieve, and a powder of 500 μm or less was recovered. 5 g of the obtained powder was immersed in a solution in which 2.4 ml of red ink (SPN-100A # 11 made of platinum) as a water-soluble dye was mixed with 72.6 ml of distilled water, and the whole tomato powder was colored. The excess coloring solution was separated and removed by vacuum filtration using a membrane filter (SCWP09025 manufactured by Millipore) having a pore size of 8 μm. The tomato powder dyed red with the water-soluble dye obtained was treated with an electric dryer at 100 ° C. for 5 hours.

  The resulting red-colored tomato powder and a two-component mixed thermosetting resin epoxy resin (IWA Performance Polymers & Fluid Japan Devcon ET) are mixed at a mass ratio of 7:10, and are made of stainless steel. The mold was filled and formed into a cylindrical shape having a diameter of about 15 mm and a thickness of about 5 mm. This molded body was cured at room temperature.

  The appearance of the obtained composition is shown in FIG. As shown in FIG. 9, in the resin composition 10D of Example 5, the tomato-derived powder colored in red is bonded with a highly transparent epoxy resin, and the molded product is colored red. Since the epoxy resin encloses the colored powder, the color did not come off even when placed in water. Even if the ratio of the tomato-derived powder is large, it is possible to mold with a resin, and it was confirmed that the color of the molded body does not impair the color of the colored powder. Colored vegetable powder (tomato powder colored red with a water-soluble dye): epoxy resin = 7: 10 (w / w). The tomato powder content was about 41% by mass.

[Comparative Example 1]
Using commercially available α-cellulose (manufactured by Wako Pure Chemical Industries, Ltd.), in the same manner as in Example 2, coloring was performed using a water-soluble dye having the same concentration. The appearance of the obtained powder of Comparative Example 1 and the colored powder of the tomato-derived powder of Example 2 is shown in FIG. The color of cellulose powder is extremely thin and it is difficult to express a wide variety of colors.

  Tomato-derived powder and bamboo powder are herbaceous plants, but it is known that the main component is cellulose. However, cellulose is the smallest unit constituting cell walls and the like, and it is considered that there is not much difference due to plant differences. The coloring mechanism of the present invention is considered to be caused by pores in the dry tissue of the herbaceous plant as well as the hydrophilic property of the herbaceous plant. In addition, it is thought that the powder before coloring with a tomato origin powder can absorb water 200 mass% or more, and can hold | maintain a water-soluble colorant firmly as a result.

Example 6
After harvesting Momotaro and Tomato, the dried stems should be coarsely pulverized with a coarse pulverizer (SDR-14 manufactured by Aikawa Tekko Co., Ltd.) and further pulverized with a fine pulverizer (MKZA10-20 manufactured by Masuko Sangyo Co., Ltd.). A tomato-derived powder was prepared. This tomato-derived powder was subjected to vibration classification with a 500 μm sieve, and a powder of 500 μm or less was recovered. 5 g of the obtained powder is immersed in a solution obtained by mixing 10.5 g of ammonium dihydrogen phosphate (manufactured by Wako Pure Chemical Industries, Ltd.), which is a water-soluble chemical, and 95 g of distilled water. Ammonium hydrogen support was applied. Excess chemical solution was separated and removed by vacuum filtration using a membrane filter (SCWP09025 manufactured by Millipore) having a pore size of 8 μm. The obtained tomato powder carrying ammonium dihydrogen phosphate was treated with an electric dryer at 100 ° C. for 5 hours, and then treated on a hot plate at 220 ° C. for 30 minutes.

  4 g of the tomato powder on which ammonium dihydrogen phosphate was supported and 36 g of granular polypropylene (PMA20V manufactured by Sun Allomer), which is a thermoplastic resin, were mixed using a lab plast mill (4C150-01 manufactured by Toyo Seiki). Mixing was carried out at 180 ° C. for 5 minutes at a rotational speed of 10 rpm, 5 minutes at 50 rpm, and 15 minutes at 150 rpm.

  The appearance of the obtained composition is shown in FIG. As shown in FIG. 11, in the resin composition 10F of Example 6, the tomato powder blackened by the heat treatment by the hot plate is uniformly dispersed in the polypropylene, and becomes a black colored polypropylene. Colored vegetable powder (tomato powder colored with water-soluble chemicals): polypropylene = 5: 95 (w / w).

  The resin composition produced in the present invention is a material colored with a water-soluble colorant, and the use of a water-soluble colorant as a colorant for a resin that is inherently hydrophobic is an environmentally-friendly member / part. Can be used. Furthermore, there are few generation | occurrence | production of a hazardous | toxic substance in a manufacturing process or utilization environment, and a lightweight member can be supplied to a market, reducing the usage-amount of resin which is a petroleum-derived material. In addition, the plant-derived powder of the present invention realizes the support of a pigment that cannot be realized only with cellulose, which is the main component of the plant, with the characteristics of its structure and chemical hydrophilicity. It is possible to retain a functional factor that excels in performance. Therefore, not only the use as a resin composition is expanded, but also development to a member having new functionality is possible. Furthermore, since the resin composition produced in the present invention using a water-soluble colorant including a fluorescent colorant and the molded product thereof are colored (emitted) by ultraviolet rays, the elderly is expected to have high visibility and the market is expected in the future. It is expected to be applied as a daily product for nursing care or as a care product. In addition, the external appearance of the resin composition colored tomato-derived powder using polypropylene as the resin can be colored in various colors with a water-soluble colorant as shown in FIG. The resin composition shown in FIG. 12 is colored vegetable powder (tomato powder colored with a water-soluble colorant): polypropylene = 5: 95 (w / w).

  DESCRIPTION OF SYMBOLS 10,10A ... Resin composition, 11 ... Resin, 12 ... Colored vegetable powder

Claims (10)

  A resin composition comprising a colored plant powder obtained by coloring a plant powder obtained by powdering a plant with a water-soluble colorant, and a resin.   The resin composition according to claim 1, wherein the plant is a herbaceous plant.   The resin composition according to claim 1 or 2, wherein the plant is a stem portion of a herbaceous plant and is a stem portion having a cavity.   The resin composition according to any one of claims 1 to 3, wherein the resin is a thermoplastic resin or a thermosetting resin.   The resin composition according to claim 1, wherein the resin has a melting point or a thermosetting temperature of less than 300 ° C. 5.   The resin composition according to any one of claims 1 to 5, wherein a content of the vegetable powder in the resin composition is 50% by mass or less.   The resin composition according to any one of claims 1 to 6, wherein the vegetable powder has a size that passes through a sieve having an opening of 500 µm.   The resin composition according to any one of claims 1 to 7, wherein the plant is tomato or bamboo.   The molded object which shape | molded the resin composition as described in any one of Claims 1-8. It is a manufacturing method of the resin composition as described in any one of Claims 1-8,
A pulverization process to pulverize a plant into a vegetable powder;
A coloring step of coloring the vegetable powder into a colored vegetable powder;
A method for producing a resin composition comprising: a mixing step of mixing the colored vegetable powder and a resin.

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