JP5344544B2 - Fixtures and lighting fixtures - Google Patents

Description

  The present invention relates to a member, a fixture, and a lighting fixture.

In recent years, environmental problems such as global warming and resource depletion have attracted attention, and biodegradable plastics and biomass plastics are being developed as alternatives to conventional petroleum resins (petroleum plastics). Biodegradable plastics are plastics that are decomposed by microorganisms. Biomass plastic is plastic made from biological resources that can be recycled as raw materials.

For example, Patent Document 1 discloses a biodegradable resin composition containing kenaf fibers, which has a kenaf fiber content of 10 to 50% by mass and is suitable for manufacturing molded products such as electrical and electronic equipment products. It is described that a fiber reinforced resin composition can be provided.
JP-A-2005-105245

  Most parts of lighting fixtures are made of petroleum-based resin due to problems such as heat resistance and strength. In particular, a large part such as a light fixture is more susceptible to influences such as strength than a small part. However, if the amount of materials used per part is large and it becomes possible to replace materials from petroleum-based resins with plant-derived resins, etc., CO2 from production (including oil extraction and plant growth) to disposal treatment The effect of reducing carbon emissions is significant.

  Furthermore, conventional petroleum-based resins are easy to transmit light, and easily transmit light even when colored or painted. When a light-shielding metal material is used, the shape is limited because it is difficult to form a fine shape or the weight is increased.

  Plant-derived resins and the like can be used as substitutes for petroleum-based resins by enhancing their functionality, and are expected to be developed into more products. In particular, by eliminating the lack of strength, it is expected that the use of large parts will increase and the applications will expand. According to Patent Document 1, it is possible to manufacture a molded product such as an electric / electronic device product using a biodegradable resin composition as one of reinforcing materials in consideration of the environment. For example, it is used as a packaging material for parts such as mobile phones and personal computers.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a member, a fixture, and a lighting fixture that have a low environmental load and a high light shielding effect.

The instrument according to the first aspect of the present invention is:
A light shielding property formed from a plant-derived resin in which the content of the plant material containing kenaf fiber is 90% by mass or more of the material, and the content of the kenaf fiber is 10 to 50% by mass of the material. It has the member which has , It is characterized by the above-mentioned.

The lighting fixture according to the second aspect of the present invention is:
A light shielding property formed from a plant-derived resin in which the content of the plant material containing kenaf fiber is 90% by mass or more of the material, and the content of the kenaf fiber is 10 to 50% by mass of the material. It has the member which has , It is characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the load to an environment is small and the member, fixture, and lighting fixture with a high light-shielding effect can be provided.

  First, the kenaf fiber contained in the plant-derived resin will be described. One kenaf of plant material contained in plant-derived resin is an annual plant of the genus Aioaceae, which is characterized by very fast growth and a large number of fibers that can be harvested. Two types of fibers can be obtained from the kenaf stalks, and the outer layer (bast) has coarse eyes, and the center (wood) has fine details. It is often used as a substitute fiber for jute and in recent years as an alternative resource for wood pulp. Kenaf is attracting attention as a means to solve environmental problems such as global warming and deforestation by absorbing a large amount of carbon dioxide during growth and preventing deforestation by reducing the amount of wood used as an alternative resource for wood pulp. Is done.

  The kenaf fiber according to the embodiment of the present invention is obtained by cutting or pulverizing kenaf. The kenaf fiber may be a whole stem or a bast portion and a wood portion, or may be a mixture of a bast portion and a wood portion. Preferably, the reinforcing effect can be increased by increasing the proportion of fibers in the bast portion.

  The fiber length of the kenaf fiber includes an average fiber length of 100 μm to 20 mm, a fiber length of at least 300 μm to 20 mm, more preferably 1 to 20 mm. Here, the average fiber length is defined as the fiber length in the longitudinal direction excluding broken fragments (hereinafter referred to as broken fragments) of less than 50 μm.

  The fiber length of the kenaf fiber is not sufficient if the reinforcing effect of the plant-derived resin is less than 300 μm, and the reinforcing effect increases as the length becomes longer. When the thickness exceeds 20 mm, the reinforcing effect is excellent, but mixing is not successful and the composition in the material becomes non-uniform, or causes of defects during molding such as injection molding, for example, abnormal appearance of the product (Shape, thickness, surface irregularities, etc.) and the molding apparatus may be clogged and the apparatus may be damaged. Further, since the adhesion between the kenaf fiber and the resin is not sufficient, it is desirable to remove in advance fibers (broken fragments) that are less than 50 μm.

  Next, the biodegradable resin constituting the plant-derived resin will be described. Biodegradable resin materials include mainly biodegradable monomers that are artificially synthesized and available, or oligomers and polymers composed of such monomers, and oligomers composed mainly of biodegradable monomers that are synthesized and available in nature. Modified bodies and modified bodies of polymers, oligomers and polymers composed mainly of derivatives of biodegradable monomers that are synthesized and available in nature, or modified bodies of oligomers and modified bodies of polymers are used.

  Examples of the artificial synthetic biodegradable oligomer and polymer include polylactic acid, and a modified product thereof can also be suitably used. Examples of natural synthetic biodegradable oligomers and polymers include starch, amylose, cellulose, chitin, and chitosan, and modified products thereof can also be suitably used. Examples of modified natural synthetic biodegradable oligomers and polymers include lignin.

  In particular, artificial synthetic biodegradable oligomers and polymers, or modified products thereof, and natural synthetic biodegradable oligomers and polymer modified products have excellent thermoplasticity due to their moderate intermolecular bonding strength, and when dissolved. The viscosity of the resin is not remarkably increased, and is preferable because it has good moldability. Of these, polyesters having thermoplasticity and crystallinity and modified products thereof are preferable, and aliphatic polyesters such as polyesters are particularly preferable. Examples thereof include polylactic acid.

  A polymer alloy obtained by mixing a thermoplastic resin synthesized from petroleum as a raw material and a biodegradable resin may be used. Examples of the thermoplastic resin include polypropylene (PP), polystyrene (PS), and polycarbonate. Further, a thermosetting resin and a thermosetting resin using plant raw materials such as lignin and cellulose may be used. By using a thermosetting resin using a plant material, the content of the plant material of the plant-derived resin can be increased, and the environmental load can be reduced.

  The biodegradable resin used for the plant-derived resin containing the kenaf fiber according to the embodiment of the present invention uses polylactic acid. When considering commercialization and practical application, not only the physical properties but also the price is well balanced, and it is particularly desirable to use corn-derived polylactic acid. The plant-derived resin used in addition to the biodegradable resin includes various plants, but as a plant that can increase the content of plant material while maintaining the strength after molding, kenaf fiber Is preferably used.

  The plant-derived resin containing kenaf fiber contains 50 to 95% by mass of the above-described biodegradable resin, and additionally contains various additives added to the crystal nucleating agent and the usual thermoplastic resin. At this time, the content of the plant material in the material is 50% by mass or more, and the content of the inner kenaf fiber occupies 10 to 50% by mass. There is no restriction | limiting in particular in the mixing method of various components of these plant origin resin, It mixes by normal solid mixing or melt mixing. Moreover, there is no restriction | limiting in particular also about the shaping | molding method of the product using plant origin resin, It shape | molds by methods, such as injection molding, extrusion molding, and compression molding.

  Precise injection molding is possible when a product made of the plant-derived resin containing the kenaf fiber is used as a material. In addition, the quality of the product after molding, here, the strength and heat resistance in normal use can be maintained.

  More specifically, for plant-derived resins containing kenaf fibers, when a plant material is contained in an amount of 50% by mass or more, a carbon dioxide reduction effect is more likely to appear than when a conventional petroleum resin is used. More preferably, in order to obtain many carbon dioxide reduction effects, the plant material is molded with a high distribution rate. Specifically, it is possible to mold a product containing 90% by mass or more of a plant material having a distribution ratio within a range in which the quality after molding can be maintained. In addition, in the case where there is a high demand for molding conditions such as a shape, such as when used for the exterior of an electronic device, a product is molded containing 80% by mass or more of a plant material in consideration of ease of molding. . Regarding the content of the plant material, the content of the plant material can be arbitrarily set while taking into consideration the balance between reduction of environmental burden, ease of molding, and productivity as other molding conditions.

  Further, regarding the content of kenaf fiber, when the content of kenaf fiber exceeds 50% by mass, the fluidity of the plant-derived resin is remarkably lowered, and there is a fear that it is difficult to maintain the shape at the time of molding. When the content of the kenaf fiber is less than 10% by mass, the bending elastic modulus of the obtained molded body is rapidly decreased. Therefore, the kenaf fiber content in the plant-derived resin material must be used within a range of 10 to 50% by mass, and more preferably 15 to 40% by mass.

  Each kenaf fiber used for the material is larger than the polymer compound, and when mixed with a plant-derived resin, light incident on the material is easily scattered. Moreover, since 10-50 mass% is contained in a material and it exists uniformly, the scattered light is easy to be absorbed by irregular reflection. Therefore, plant-derived resin becomes opaque white (milky white), and there is little light which permeate | transmits in plant-derived resin, and it has light-shielding property. Further, the molded product does not discolor plastic (yellowing) even when irradiated for a long time, and has excellent light resistance. In addition, it is possible to color materials and products by mixing a colorant with a plant-derived resin in advance, and it is also possible to print or paint the molded product. By coloring or printing the plant-derived resin, it is possible to obtain a higher light-shielding property.

  In many products, it is preferable to replace products using conventional petroleum-based resins with plant-derived resin materials containing kenaf fibers according to embodiments of the present invention. Alternatively, it is easy to obtain an effect of reducing the environmental load by replacing a member that occupies a large proportion of the product. Alternatively, the environmental load can be further reduced by increasing the content of the plant material of the plant-derived resin. Specifically, reducing environmental impacts can reduce carbon dioxide emissions from raw material collection to disposal by replacing petroleum-based resins with plant-derived resin materials, leading to the prevention of global warming. Is mentioned. In addition, plants such as kenaf are renewable (so-called non-depleted resources) in the natural circulation, leading to the suppression of petroleum resource depletion.

  For example, in the case of a lighting fixture such as a pendant light, the bulk is made up of a bulk light and a light-emitting lamp, and the resin bulk is replaced with a plant-derived resin material containing kenaf fibers from a conventional petroleum-based resin. High environmental impact reduction per product. The present invention is not necessarily limited to a highly versatile product or a large product, and can be applied to various products to reduce the environmental load. For example, in the case of a lighting fixture such as a pendant light, other parts using petroleum-based resin such as a remote controller and a switch can be replaced. It is preferable to replace more products (parts) with plant-derived resin materials containing kenaf fibers, and to increase the plant material content of the plant-derived resins.

  Hereinafter, the light shielding member according to the embodiment of the present invention will be described in detail using specific examples. In the drawings to be referred to, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

Example 1
FIG. 1 shows a light fixture (hereinafter referred to as an implementation product A) that is a light-shielding member using a plant-derived resin containing kenaf fibers according to an embodiment of the present invention. A hemispherical shape is used. (A) is a side view, (b) is a plan view seen from the light emitting portion side. As an object to be compared, a bulk of a lighting fixture using a conventional petroleum resin having the same shape (hereinafter referred to as a conventional product B) is prepared. FIG. 2 is a diagram showing the measurement of the luminous flux when using the umbrellas (implemented product A and conventional product B) of the lighting fixture of FIG.

  The luminaire 1 includes a hemisphere-shaped umbrella 2, a cord suspension 3 to which the luminaire is attached, and a light-emitting lamp 4 attached in the vicinity of the opening inside the umbrella 2. The cord suspension 3 is connected to a ballast, a power source and the like, and can suspend and support the lighting fixture 1 from a ceiling or the like. The light-emitting lamp 4 includes a small annular fluorescent lamp inside and a large annular fluorescent lamp outside.

  The luminous flux is a physical quantity representing the brightness of light emitted in a certain direction from the light source, and is represented by the product of the light emission intensity (luminous intensity) and the angle (solid angle). In a luminaire, the direction of light spread (light distribution) and light intensity from the luminaire are often indicated by a light distribution curve. When the lighting fixture 1 of FIG. 1 is used, it becomes symmetrical with respect to the reference axis, is the same in any cross section, and can be expressed in polar coordinates. Here, the center (center O) of the light-emitting lamp 4 is taken as the center of coordinates.

  The coordinate Q0 immediately below the light emitting portion is set to 0 degree of deflection, and the horizontal surface of the light emitting portion is set to coordinate Q3 and coordinate -Q3. Coordinate Q1 is declination 20 degrees, coordinate Q2 is declination 70 degrees, coordinate Q3 is declination 90 degrees, the space formed by coordinates Q0 and Q1 is R1, the space formed by coordinates Q1 and coordinates Q2 is R2, and coordinates Q2 Let R3 be the space created by the coordinates Q3. Although not shown, the same applies to the direction on the coordinate -Q3 side.

  When the luminous intensity was measured, the product A was higher than the conventional product B in the spaces R1 and R2, and the result was about 13% higher in the space R1. In the space R3, the implementation product A was equal to or less than the conventional product B, and the result was about 4% lower in the vicinity of the light emitting partial horizontal plane (coordinate Q3).

(Example 2)
FIG. 3 is a graph showing instrument efficiency. The luminaire used in the experiment is the same as that in Example 1, and the luminaire 2 of the luminaire 1 shown in FIG. Appliance efficiency is the percentage of the luminous flux emitted outside the fixture when the light source is put in the lighting fixture and the total luminous flux emitted when the light source alone is lit. The higher the efficiency value, the better the lighting fixture. As shown in the graph, it can be said that the implementation product A has higher instrument efficiency than the conventional product B.

(Example 3)
FIG. 4 shows the bulk of a lighting fixture that is a light-shielding member that uses a plant-derived resin containing kenaf fibers according to an embodiment of the present invention (hereinafter referred to as an implementation product X). The shape is a truncated cone, and the thickness of the bulk is 2.0 mm. (A) is a side view, (b) is a plan view seen from the light emitting portion side. As an object to be compared, a bulk of a lighting fixture using a conventional petroleum resin having the same shape (hereinafter referred to as a conventional product Y) is prepared.

  The luminaire 11 includes a cone 12 in the shape of a truncated cone, a cord suspension 13 to which the luminaire is attached, and a light-emitting lamp 14 attached in the vicinity of the opening inside the umbrella 12. The cone 12 in the shape of a truncated cone is formed so as to have a thickness of 2.0 mm. The cord suspension 13 is connected to a ballast, a power source, and the like, and can suspend and support the lighting fixture 11 from a ceiling or the like. The light-emitting lamp 14 includes three A-shaped fluorescent lamps at point-symmetric positions.

  FIG. 5 is a graph showing the transmittance. X represents an actual product X, Y represents a conventional product Y, and Z represents no bulk. Here, the transmittance represents the intensity ratio between incident light and transmitted light as a percentage. In the case where there is no bulkiness of Z, since it is the ratio of the incident light and the transmitted light when assuming that there is a bulkiness, the incident light and the transmitted light are equal, and the transmittance is 100%. . It can be seen that the conventional product Y has light transmission suppressed to some extent by the bulk, but the light shielding effect is insufficient. The product X has a lower transmittance than the conventional product Y, and when the thickness of the bulk is 2.0 mm, the transmittance is 0, which does not transmit light at all and can be said to have a high light shielding effect.

  From the results of Examples 1 to 3, the bulk of the lighting fixture using the plant-derived resin containing the kenaf fiber according to the embodiment of the present invention is compared with the bulk of the lighting fixture using the conventional petroleum resin, It can be said that it is an efficient lighting fixture. On the surface side facing the light emitting lamp of the umbrella (inside of the umbrella), the luminous flux is slightly small in the horizontal direction, but the luminous flux is large near the portion immediately below the luminous lamp that should be irradiated, and there is little waste. It is highly efficient and energy saving.

  In addition, since light is not transmitted outside the bulk, it is possible to irradiate only necessary portions and to distinguish them from portions to be shielded. By taking advantage of this property and applying it to lighting fixtures that incorporate light effects, the possibilities for various types of lighting fixtures are expanded.

  Furthermore, the plant-derived resin containing the kenaf fiber according to the embodiment of the present invention can be used for various light shielding members by utilizing the high light shielding effect. For example, when enjoying images using a projector at home, the images are often projected onto a simple screen or a white sheet or wall, but it is difficult to say that the images are clear. Screens using high performance materials are very expensive. By using the plant-derived resin containing the kenaf fiber according to the embodiment of the present invention for this indoor screen, it is inexpensive, has a high light shielding effect, and can enjoy a beautiful image.

  Moreover, you may use the plant-derived resin containing the kenaf fiber which concerns on embodiment of this invention for the light-shielding members which require high light-shielding properties, such as a blind and the light-shielding curtain of a railway vehicle. In products using conventional petroleum-based resins, the light-shielding effect may be increased by using a color having a high light absorption rate such as black or dark color, and the light-shielding effect is often poor in the case of white or light color. By using the plant-derived resin containing the kenaf fiber according to the embodiment of the present invention, the light shielding effect is high and the color variation can be abundant. In addition, even in the case of white or light color, since it is difficult for the color to change (yellowing), it is possible to maintain a blind that looks good for a long time.

  As described above, according to the present invention, it is possible to provide a light shielding member using a plant-derived resin containing a kenaf fiber, which has a low environmental load and a high light shielding effect.

  In addition, the selection and combination of the plant-derived resin composition, the content of the kenaf fiber, the fiber length to be used, the type of the light shielding member to be used, and the like are merely examples, and can be arbitrarily changed and modified.

  Other suitable modifications of the present invention include the following configurations.

  About the member which concerns on the 1st viewpoint of this invention, Preferably, content of the vegetable raw material containing the said kenaf fiber may be comprised by 50 mass% or more of the said material.

  Or content of the vegetable raw material containing the said kenaf fiber may be comprised with 80 mass% or more of the said material.

  Or content of the vegetable raw material containing the said kenaf fiber may be comprised by 90 mass% or more of the said material.

  Or content of the said kenaf fiber may be comprised by 10-50 mass% of the said material.

  Alternatively, the member may be a light shielding member.

  Alternatively, the light-shielding member may be a member constituting an instrument.

The lighting fixture which concerns on embodiment of this invention is shown, (a) is a side view, (b) is the top view seen from the light-emitting lamp side. It is the figure which showed the direction of the light distribution of the lighting fixture of FIG. It is the graph which showed the fixture efficiency of the lighting fixture of FIG. The lighting fixture which concerns on embodiment of this invention is shown, (a) is a side view, (b) is the top view seen from the light-emitting lamp side. It is the graph which showed the transmittance | permeability of the lighting fixture of FIG.

Explanation of symbols

1,11 Lighting equipment 2,12 Shaft 4,14 Luminescent lamp

Claims (2)

A light shielding property formed from a plant-derived resin in which the content of the plant material containing kenaf fiber is 90% by mass or more of the material, and the content of the kenaf fiber is 10 to 50% by mass of the material. An instrument comprising a member having the same. A light shielding property formed from a plant-derived resin in which the content of the plant material containing kenaf fiber is 90% by mass or more of the material, and the content of the kenaf fiber is 10 to 50% by mass of the material. The lighting fixture characterized by including the member which has.

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