JP4770966B2 - Electric appliances - Google Patents

Description

  The present invention relates to an electrical product.

  Electrical products are usually used in a cycle of several to tens of years and are discarded as waste. Currently, with the exception of some large electrical products, no waste is collected and recycled, and there are no legal restrictions. For this reason, most electrical products are disposed of as non-burnable garbage at the time of disposal. Even if the shape is small, if the number of sales is large, the result is that a large amount of waste is generated as a whole. This is a serious problem nowadays when there is a shortage of waste disposal sites.

  As a commonly used processing method, there is a method of shredding waste. However, this shredding process only reduces the volume of waste, and if it is landfilled, the waste remains as it is for decades and hundreds of years, and is not a basic solution. Even if the shredder dust is material recycled, all parts are finely crushed. For example, valuable materials such as copper are mixed with other low-value materials, resulting in lower purity and recovery efficiency. Will get worse.

  The present invention has been made in view of the above problems, and its purpose is not to pollute the environment even if it is discarded as it is, and the disposal process is greatly simplified, and has practically sufficient durability. To provide products.

That is, the present invention is an electrical product including a casing made of a sheet-like panel and case, an electrical product body, and a structure as necessary.
At least a part of the casing and the structure is composed of a biodegradable material mainly composed of polylactic acid,
In addition, the present invention relates to an electric product characterized in that a member formed of a biodegradable material mainly composed of polylactic acid and a member formed of a non-biodegradable material can be separated.

  In the electrical product of the present invention, since at least a part of the casing and the structure is composed of a biodegradable material mainly composed of polylactic acid, in addition to being able to provide an electrical product that takes advantage of the characteristics of polylactic acid. Even if it is discarded as it is, the environment is not polluted, the disposal process is greatly simplified, and since it has practically sufficient durability, it has the effect of withstanding long-term use.

  In addition, if the biodegradable material mainly composed of polylactic acid is a mixture of polylactic acid and other materials and the weight ratio of the other materials does not exceed 50%, the characteristics of polylactic acid In addition, when the biodegradable material mainly composed of polylactic acid is 100% polylactic acid, it is possible to provide an electrical product that maximizes the excellent characteristics of polylactic acid. it can.

  That is, by forming at least a part of the panel and structure of the electrical product with a biodegradable material mainly composed of polylactic acid, it is possible to provide a storage case with higher transparency than in the case of using other biodegradable resins. Therefore, it is suitable for storing electrical products such as recording / recording tapes, optical disks, floppy disks, and electronic parts. Moreover, there is an effect that even if it is discarded as it is, there is no fear of causing problems such as environmental pollution.

  In the electrical product of the present invention, the members constituting the storage case are further fixed by screwing or fitting, or are fixed with an adhesive so that they can be easily peeled off from each other. It can be divided into biodegradable materials and non-biodegradable materials. When the storage case is provided with an opening / closing lid, the storage case is supported by a pivot bearing so as to be rotatable, and the opening / closing lid is configured to be closed by rotating and fitting into the case body. Disassembling and dismantling of the case is extremely easy.

Therefore, according to the present invention, the following effects can be obtained.
(1) With regard to the members made of biodegradable materials constituting the electrical product storage case, there are a wide range of options for disposal at the time of disposal, which may be discarded as it is, or may be recycled as a normal resin. .
Compared to the time and effort of dismantling with conventional small-sized products, the amount of material obtained is small, and because it is often made with inexpensive materials, material recycling is often not economically feasible. However, since the present invention has an option that can be discarded as it is, there is also an advantage in this aspect.

(2) Regarding the structural member made of a non-biodegradable material, since the amount to be recycled is reduced by separating the biodegradable member, the processing cost is also reduced. Moreover, since the content rate of valuable metals, such as copper, increases relatively, it becomes a more valuable resource.

(3) Regarding biodegradable materials, even if discarded as they are, they will not remain as long-term waste and will not damage the landscape. Furthermore, since the biodegradable material does not contain harmful substances such as heavy metals and organochlorine compounds, there is no fear of generating harmful substances regardless of whether it is disposed or incinerated. In the case where the biodegradable material is made from grain resources, there is also an advantage that no depleting resources such as oil are used. In addition, by placing waste products in an environment where the degradation of biodegradable materials accelerates, such as in a high-temperature and high-humidity environment, the housing etc. is naturally decomposed, and the parts that should be recycled biodegradable can be saved It can also be taken out.

It is explanatory drawing about the definition of a deflection | deviation, and a measuring method. It is a disassembled perspective view of the remote commander based on this invention. It is sectional drawing which shows the principal part structure of the panel which comprises the said remote commander. It is a disassembled perspective view of the sleeve case for minidiscs.

  An electrical product according to the present invention is an electrical product that includes a housing, an electrical product body, and a structure as necessary. At least a part of the housing and the structure has a heat deformation temperature (JIS K7207). ) Is preferably composed of a biodegradable material having a temperature of 50 ° C. or higher. The biodegradable material is a material that is decomposed through a biological metabolic function (hereinafter the same).

  A housing | casing means the member which forms the surface of an electric product while accommodating an electric product (electric equipment) main body here. A structure is a member responsible for the strength of an electrical product. The electric product means a product having an electric circuit inside, a recording medium such as a tape and a disk, an accessory thereof, and a driving device for the recording medium.

  In the electrical product according to the present invention, at least the outermost surface is formed of a biodegradable material, and the melt flow rate (JIS K7210) of the biodegradable material is a value of 6 to 12. Each is preferred.

  An electrical product according to the present invention is an electrical product including a housing, an electrical product body, and a structure as necessary, and the housing and a part of the structure are made of a biodegradable material, In addition, a member formed of a biodegradable material and a member formed of a non-biodegradable material have a structure that can be separated.

  In the electrical product of the present invention, it is desirable that the heat distortion temperature (JIS K7207) of the biodegradable material is 50 ° C. or higher.

  An electrical product according to the present invention includes a printed circuit board and a housing that encloses the printed circuit board. The electrical product controls a separated electrical product by emitting light of an arbitrary wavelength, and the housing emits light. The part to be formed is preferably made of a light-transmitting biodegradable material, and the other part of the casing is preferably made of an impact-resistant biodegradable material. It is preferable that the heating deformation temperature (JIS K7207) of each biodegradable material described above is 50 ° C. or higher.

  The electrical product according to the present invention is an electrical product having a sheet-like panel having a convex button formed on the surface thereof by press working as a part of the casing, and the panel is formed of a biodegradable material. Is good.

  In the electric product of the present invention, the biodegradable material has a heating deformation temperature (JIS K7207) of 50 ° C. or higher, and the back surface of the convex button includes a binder made of the biodegradable material and a conductive material. It is desirable that a conductive film be formed. Further, the binder is made of a polyester-based biodegradable material, and the melting point of the biodegradable material used for the binder is used for a sheet-like panel on which the convex buttons are formed. It is desirable that it is lower than the melting point of the biodegradable material.

  The electrical product according to the present invention is an electrical product having a casing composed of a sheet-like panel and a case, wherein both the panel and the case are formed of a biodegradable material, and the panel and the case are biodegradable. It is characterized by being bonded with an adhesive made of a material. Each of the biodegradable materials described above preferably has a heating deformation temperature (JIS K7207) of 50 ° C. or higher.

  An electrical product according to the present invention is an electrical product including a housing, an electrical product body, and a structure as necessary. At least a part of the housing and the structure is a living body mainly composed of polylactic acid. It is composed of a degradable material.

  The biodegradable material mainly composed of polylactic acid is a mixture of polylactic acid and other materials, and the weight ratio of the other materials does not exceed 50%. It is desirable that the material is one or a plurality of materials arbitrarily selected from the group consisting of biodegradable organic substances other than polylactic acid and inorganic compounds (magnesium hydroxide, talc, carbon, iron oxide, etc.).

  Examples of biodegradable organic substances other than polylactic acid include polybutylene succinate, polycaprolactone, aliphatic polyester (eg, polyhydroxybutyric acid), cellulose acetate biodegradable resin, polyvinyl alcohol, and natural organic substances (paper, wood, natural rubber) , Glue, lacquer, etc.), preferably one or more kinds of materials arbitrarily selected from the group consisting of. Furthermore, the biodegradable material mainly composed of polylactic acid is preferably made of only polylactic acid, and the disposal process is particularly simplified, and there is no concern about environmental pollution due to disposal.

  Further, in the electrical product, it is desirable that the electrical product body is fixed in the casing by screwing or fitting, or is fixed with an adhesive so that it can be easily detached from the casing. Therefore, it can be easily separated into a biodegradable member and a non-biodegradable member which are safe in terms of environmental conservation even if discarded as they are. Furthermore, it is preferable that a push button for operation of the electric product main body is provided on the surface of the casing, and the push button is made of a biodegradable material mainly composed of polylactic acid.

  Next, at least a part of the electrical product storage case is preferably made of a biodegradable material mainly composed of polylactic acid.

This electrical product storage case is preferably configured as follows.
(1) The biodegradable material mainly composed of polylactic acid is a mixture of polylactic acid and another material, and the weight ratio of the other material does not exceed 50%.
(2) The other material is one or a plurality of materials arbitrarily selected from the group consisting of biodegradable organic substances other than polylactic acid and inorganic compounds (magnesium hydroxide, talc, carbon, iron oxide, etc.). thing,
(3) Biodegradable organic substances other than the above polylactic acid are polybutylene succinate, polycaprolactone, aliphatic polyester (for example, polyhydroxybutyric acid), cellulose acetate biodegradable resin, polyvinyl alcohol, and natural organic substances (paper, wood, Natural rubber, glue, lacquer, etc.) one or more kinds of materials arbitrarily selected from the group consisting of,
(4) The above-described biodegradable material mainly composed of polylactic acid is composed only of polylactic acid (in this case, the disposal process is particularly simplified and the concern about environmental pollution due to disposal is reduced). ,
(5) The members constituting the storage case are locked by screwing or fitting, or fixed with an adhesive so that they can be easily peeled off (in this case, biodegradable Can be easily separated into non-biodegradable and non-biodegradable members)
(6) The storage case is a transparent or translucent storage case.
(7) When the storage case is provided with an opening / closing lid, the opening / closing lid is pivotally supported by a pivot bearing, and the opening / closing lid is closed by rotating and fitting into the case body. Is preferred.

  In the present invention, the casing and structure of the electrical product and the storage case of the electrical product are made of, for example, a biodegradable material mainly composed of polylactic acid. Ideally, all parts and components of electrical products should be made of biodegradable materials, but in reality, it is technically difficult to use biodegradable materials for the electronic components that make up electrical circuits. It is. Therefore, housings that occupy most of the volume of electrical products and storage cases for electrical products are made of biodegradable materials mainly composed of polylactic acid, for example, and non-biodegradable parts such as electronic components and substrates are formed. A structure that can be easily separated and separated. Thereby, the part which should be recycled and the part which can be discarded as it is can be processed separately by a certain amount of dismantling process.

  In the electrical product of the present invention, the outermost surface of the casing or the structural material is desirably made of a biodegradable material. For example, the outermost surface of a case such as a radio, a microphone, a neck TV, a keyboard, a portable small stereo cassette player (for example, Walkman (trade name)), a cellular phone, a radio cassette, an earphone or the like is made of a biodegradable material. For example, a case where a film is formed by applying or spraying a solvent solution of a biodegradable material on the surface of the case, or a case where a case where the biodegradable material is mixed with other materials is formed. In the cross-sectional structure, this can be achieved by means of increasing the distribution amount of the biodegradable material toward the outside (surface side) (can be a layer structure). In this manner, by making a part that is frequently contacted by the human body with a biodegradable material, it is possible to provide an electrical product that is safer than a commonly used synthetic resin.

  However, in order to use a biodegradable material as a material for a housing or structure of an electrical product, some physical properties are required. First, in order to use as a housing, it is desirable that the heat distortion temperature (JIS K7207) is 50 ° C. or higher in terms of maintaining strength and shape. Similarly, the melt flow rate (JIS K7210) is preferably 6 or more and 12 or less from the viewpoint of moldability such as injection molding. Further, for use as a housing or a structural material, it is desirable that the physical properties do not deteriorate so much even when left for 24 hours in an atmosphere of a temperature of 60 ° C. and a relative humidity of 80%.

  The electrical product or the storage case of the present invention includes various fillers such as a lubricant, a slow flame retardant, a flame retardant, an ultraviolet absorber, an antioxidant, a colorant, an antistatic agent, a sound insulation imparting agent, One or more kinds of materials arbitrarily selected from the group consisting of a heat resistance imparting agent, an abrasion resistance imparting agent, and reinforcing fibers may be included.

Specific examples of the filler include the following.
(1) Lubricant: zinc stearate, butyl stearate (2) Slow flame retarder: talc (3) Flame retardant: Magnesium hydroxide, aluminum hydroxide (4) Ultraviolet absorber: Phenyl salicylate (5) Antioxidant : 1,1,3-tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane (6) Colorant: Inorganic pigment, organic pigment, dye (7) Antistatic agent: alkylimidazoline (8) Sound insulation imparting agent: iron oxide (9) Heat resistance imparting agent: Talc (10) Abrasion resistance imparting agent: Graphite (11) Reinforcing fiber: Inorganic high-strength fiber, organic high-strength fiber

Hereinafter, the configuration of the present invention will be described more specifically based on test results and examples.
In the electric product and the storage case of the present invention, appropriate physical properties are required. Therefore, the present inventor has conducted studies to find a biodegradable material suitable for a casing, structure, or storage case of an electrical product by performing various physical property tests.

  Table 1 below shows the results of testing the heat resistance and moisture resistance performance of sheet materials (thickness 0.1 mm) made of various biodegradable materials (biodegradable resins). Two types of polylactic acid from different manufacturers were tested. As is clear from Table 1, polylactic acid is superior in heat resistance and moisture resistance to other materials.

  Further, as the physical property deterioration after heating, “deflection (deflection)” was measured. The deflection measuring method and the definition of deflection are as shown in FIG. That is, as shown in FIG. 1A, one short side portion of a test piece (plate sample) S of width × length × thickness = 7 × 50 × 2 (mm) is placed on the test table 50, The other short side portion was placed on the support member 51 on the test table 50, and this test table 50 was left together with the test piece S in an atmosphere of temperature 80 ° C. and humidity free for 24 hours. Next, the test stand 50 is taken out from the atmosphere, and as shown in FIG. 1B, the distance B between the upper surface of the test piece S before measurement and the upper surface of the test piece S bent into a concave shape by the heat treatment is measured. This was called “deflection”. Table 2 below shows the deflection measurement results for three types of resin raw materials. As materials for the housing and the structure, those having a deflection of 1.0 or less are desirable.

  Next, Table 3 below shows a click feeling when a sheet material similar to the sheet material described in Table 1 is press-molded to form a circular protrusion having a diameter of 7 mm and a height of 0.5 mm, which is used as a push button. The results of the durability test are shown. The reason for carrying out this test is that in electrical products, the sheet material processed into such a shape often forms the surface layer of the product and is used as an operation button. From the results of Table 3, it was found that polylactic acid has appropriate rigidity and durability.

  Table 4 below shows the measurement results of the light transmittance of various materials. When used as an electrical product, it is necessary to confirm not only the transparency in the visible light region but also the transmittance at a wavelength near 900 nm for communication in the infrared region. . As shown in Table 4, polylactic acid showed high transmittance in both wavelength regions.

  In addition, physical properties such as impact resistance, tensile strength, moldability and the like also become problems, but it can be easily confirmed that these materials are similarly excellent from known materials such as materials provided by the resin manufacturer. Thus, polylactic acid showed excellent results in all physical properties, so a prototype was made using this as a raw material.

Hereinafter, the present invention will be described in detail based on various examples.
[Example 1]
FIG. 2 is an exploded perspective view showing the overall structure of a television or video remote commander. The remote commander 1 includes a sheet-like panel 2, a case 3, a filter 4, a mounting substrate 5, and a fastening screw 6. The panel 2, the case 3 and the filter 4 constitute a casing, and the case 3 and the filter 4 also serve as a structure. The panel 2, the case 3, and the filter 4 are made of a biodegradable resin mainly composed of polylactic acid. The filter 4 is fixed to the case 3 by the protrusion 4 a fitting into the hole 3 a of the case 3. The mounting substrate 5 is fixed to the case 3 with screws 6. The panel 2 is fixed to the mounting substrate 5 easily with an adhesive on the back surface thereof.

  When disposing of the remote commander 1, first, the panel 2 is peeled off from the mounting substrate 5, and then the screws 6 are loosened, thereby making the casing material (panel 2 and case 3) made of biodegradable resin and non-biodegradable. It is separated into the mounting base 5 made of a property material. Comparing the volume, the total volume of the casing material is usually about three times that of the mounting substrate. Therefore, by making the entire casing material with biodegradable resin, the volume of the parts to be recycled is reduced to 1/4. It can be suppressed to the extent.

  Here, a method for manufacturing each component will be described. The case 3 and the filter 4 are formed by injection molding. Here, the case 3 is made of a material having high impact resistance, and the filter 4 needs to transmit infrared rays emitted from the remote commander. Therefore, a material having high transparency is used. Specifically, the material of case 3 is a high impact-resistant material obtained by adding talc, magnesium hydroxide, or the like to polylactic acid, and the material of filter 4 is polylactic acid (light transmittance) containing no additive. (See Table 4). Moreover, in order to color the case 3 in black, carbon powder was added to polylactic acid. In addition to carbon black, the colorant is preferably an inorganic substance that does not significantly burden the environment after biodegradation, such as iron oxide.

  Next, the structure of the panel 2 will be described in detail. FIG. 3 shows a cross-sectional structure of the panel 2, particularly a laminated structure of push buttons as the main part. The panel 2 includes a push button 30 formed as a convex portion having a circular cross section, and a substrate 31 that supports the push button 30 via an adhesive 32. The adhesive 32 is a mixture of natural resin and natural rubber emulsion.

  The push button 30 includes a spacer 33 made of polybutylene succinate having a thickness of 125 μm, and a push button main body 20 laminated on the spacer 33 with an adhesive 34 interposed therebetween. The adhesive 34 is also a mixture of natural resin and natural rubber emulsion.

  In the push button body 20, the outermost surface layer (base material) 37 is a polylactic acid film (polylactic acid biaxially stretched sheet) having a thickness of 100 μm. A printing layer 36 by screen printing using an acrylic resin is formed on the back surface of the outermost surface layer 37, and a laminate film 35 made of polybutylene succinate having a thickness of 20 μm is coated on the back surface of the screen printing layer 36, Further, a conductive film 38 is laminated on the lower surface of the push button body 20 (the back surface of the laminate film 35). The conductive film 38 is a polybutylene succinate blended with carbon black as a conductive material, and the print layer 36 is a screen print of a display for a remote commander. The laminate film 35 is for protecting the screen printing layer 36.

  As described above, in this example, polylactic acid is used as the material of the outermost surface layer 37, and as the material of the laminate film 35 and as the binder (binder) of the conductive film 38, the polylactic acid having a lower thermal softening point than polylactic acid. Since butylene succinate is used, there is an advantage that a film such as the conductive film 38 can be thermocompression-bonded at the same time in the step of pressing a circular convex portion for a push button on polylactic acid. This pressing temperature was set between 80 ° C. and 100 ° C., which is a temperature range in which polylactic acid does not thermally deform and polybutylene succinate softens to the extent necessary for thermocompression bonding.

  In addition, since carbon black is used as the conductive material in the conductive film 38, even when the conductive film is biodegraded together with the panel 2, the load on the environment can be reduced. In this example, polybutylene succinate was used as the binder, but polylactic acid and other biodegradable materials can also be employed. The conductive film 38 was prepared by mixing and dispersing a carbon black powder in a solution of polybutylene succinate resin in chloroform to obtain a dispersion, and then applying the dispersion on the surface of the glass plate. It applied by adjusting the thickness, and after drying this coating film, it peeled off.

  Here, Table 5 shows the relationship between the weight ratio of polybutylene succinate (binder) to carbon black powder (binder / carbon) and the film quality of the conductive film.

  In the above example, the weight ratio is 15/1. The film thickness was 90 μm to 140 μm. The resistance value of the conductive film was 70 Ω / 1 cm to 100 Ω / 1 cm.

  The adhesives 32 and 34 are a mixture of a natural resin and a natural rubber emulsion, but as an alternative biodegradable material adhesive, an aliphatic polyester such as polylactic acid, polybutylene succinate, polycaprolactone, polysidroxybutyric acid, A cellulose acetate-based biodegradable resin (natural resin), polyvinyl alcohol, or the like can be used. In addition, as a material for the adhesive, it is also possible to use a material obtained by lowering the molecular weight of a polymer material for panel material or sheet material. Furthermore, it can be an adhesive obtained by blending a natural product such as natural rubber and polylactic acid, or when the adhesive material is an aliphatic polyester having a melting point of 100 ° C. or less, such as polybutylene succinate. It can be used as a hot melt adhesive or as a solvent solution type adhesive.

  As described above, in the panel 2 of FIG. 3, the components excluding the substrate 31 and the screen printing layer 36, that is, the adhesive 32, the spacer 33, the adhesive 34, the laminate film 35, the outermost surface layer (base material) 37, and All of the binder of the conductive film 38 is made of a biodegradable material.

[Example 2]
As another example, an example in which the present invention is applied to an electrical product storage case will be described. FIG. 4 is an exploded perspective view of the sleeve case 11 for housing the music recording mini-disc 14. The sleeve case 11 includes only an upper case 12 and a lower case 13. Therefore, the entire sleeve case 11 can be composed of a biodegradable resin mainly composed of polylactic acid. The sleeve case 11 may be discarded with the mini-disc 14 inserted therein. In this case, the sleeve case 11 can be easily separated into the mini-disc 14 and the sleeve case 11.

As described above, according to the present invention, the following effects can be obtained.
At least a part of the housing and the structure is made of a biodegradable material having a heat deformation temperature (JIS K7207) of 50 ° C. or higher.
Therefore, the housing and the structure have practically sufficient strength and shape maintainability. Moreover, the efficiency at the time of discarding these components is improved, and options for the disposal method are expanded.

  In general, there are many opportunities for a human body to come into contact with the outermost surface of an electrical product. Therefore, when at least all of the outermost surface is formed of a biodegradable material, it is possible to provide an electrical product with higher safety than that in which the outermost surface is made of a general-purpose synthetic resin. In addition, by using a biodegradable resin excellent in moldability such as injection molding and having a melt flow rate in the range of 6 to 12 as the biodegradable material, high quality casings and structures are molded with high yield. can do.

  A part of the housing and the structure is made of a biodegradable material, and a member made of the biodegradable material and a member made of the non-biodegradable material can be separated. For this reason, in addition to the above effects, the following effects can be obtained.

  In other words, small-size products using the conventional technology require less material compared to dismantling, and are often made from inexpensive materials, so material recycling is not economically feasible. However, since it can be separated into a member made of a biodegradable material and a member made of a non-biodegradable material, there is an advantage that the former can be discarded as it is. Furthermore, regarding the constituent members made of non-biodegradable materials such as electronic parts and substrates, the amount to be recycled is reduced by separating the biodegradable members, so that the processing cost is also reduced. Moreover, since the content rate of valuable metals, such as copper, increases relatively, it becomes a more valuable resource.

  Furthermore, regarding biodegradable materials, even if they are discarded as they are, they do not remain as long-term waste and do not damage the landscape. Furthermore, since the biodegradable material does not contain harmful substances such as heavy metals and organochlorine compounds, there is no fear of generating harmful substances even if it is disposed of either by disposal or incineration. In the case where the biodegradable material is made from grain resources, there is also an advantage that no depleting resources such as oil are used. In addition, by placing waste products in an environment where the degradation of biodegradable materials accelerates, such as in a high-temperature and high-humidity environment, the housing etc. is naturally decomposed, and the parts that should be recycled biodegradable can be saved. It can also be taken out.

  Furthermore, by using a biodegradable material having a heat distortion temperature (JIS K7207) of 50 ° C. or higher, an electrical product excellent in strength and shape maintenance characteristics can be provided.

For example, it is a so-called remote commander, and in this electrical product, the part of the housing that emits light is formed of a light-transmitting biodegradable material, and the other part is formed of an impact-resistant biodegradable material. ing.
Therefore, a remote commander having sufficient practicality and durability can be provided, and the main part of the housing and other parts can be discarded as they are.

  Further, by using a biodegradable material having a heat distortion temperature (JIS K7207) of 50 ° C. or higher, an electric product having excellent strength and shape maintaining characteristics can be provided.

  In an electrical product having, as a part of a casing, a sheet-like panel having a convex button formed on the surface by pressing, the panel is made of a biodegradable material. Therefore, according to this electrical product, the same excellent effect as the case of said electrical product is acquired. In addition, since the convex button is formed by pressing, the panel can be provided at a low cost.

  Further, by using a biodegradable material having a heat distortion temperature (JIS K7207) of 50 ° C. or higher, an electric product having excellent strength and shape maintaining characteristics can be provided.

  Further, when a conductive film formed by blending a conductive material in a binder made of a biodegradable material having a melting point lower than that of the panel material is provided on the back surface of the convex button, the sheet-like panel is provided with this conductive film. In the press working for forming the convex button, since the conductive film can be thermocompression bonded at the same time, the manufacturing process is simplified.

  A casing is constituted by a sheet-like panel made of a biodegradable material and a case, and these panels and the case are bonded with an adhesive made of a biodegradable material. Therefore, even if the sheet-like panel and the case are disposed in a state where they are adhered, there is no problem in terms of environmental protection, and each can be appropriately treated after separation as desired.

  Further, by using a biodegradable material having a heat distortion temperature (JIS K7207) of 50 ° C. or higher, an electric product having excellent strength and shape maintaining characteristics can be provided.

  At least a part of the housing and the structure is made of a biodegradable material mainly composed of polylactic acid. Polylactic acid, which is a biodegradable resin, as shown in Tables 1 to 4 above, is superior to other biodegradable resins in terms of (1) durability in high temperature and high humidity environments, and is whitened. (2) It is difficult to bend even if a slight load is applied under high temperature environment. (3) Excellent click feeling when used as a push button. It has excellent durability, (4) high visible light transmittance, and excellent transparency.

  Therefore, even if this electrical product is discarded as it is, the environment will not be polluted, the disposal process will be greatly simplified, and it will be durable enough for practical use, so it can withstand long-term use. It is what has.

  In addition, if the biodegradable material mainly composed of polylactic acid is a mixture of polylactic acid and other materials and the weight ratio of the other materials does not exceed 50%, the characteristics of polylactic acid In addition, when the biodegradable material mainly composed of polylactic acid is 100% polylactic acid, it is possible to provide an electrical product that maximizes the excellent characteristics of polylactic acid. it can.

  By fixing the electrical product body in the housing by screwing or fitting, or by fixing it with an adhesive so that it can be easily removed from the housing, the biodegradable material can be easily and easily It can be separated into non-biodegradable materials.

  Since the operation push button provided on the surface of the casing is made of a biodegradable material mainly composed of polylactic acid, there is an effect that the push button is rich in click feeling and durability. Further, even if this casing is disposed with a push button, there is an effect that there is no fear of causing problems such as environmental pollution.

  In the storage case, at least a part is made of a biodegradable material mainly composed of polylactic acid. Therefore, according to this storage case, in addition to providing a storage case that makes use of the characteristics of polylactic acid as in the case of the above-mentioned electrical products, the environment is not polluted even if it is discarded as it is. In addition to the fact that the treatment is greatly simplified, the durability is sufficient for practical use, and thus it has the effect of enduring long-term use.

  In addition, if the biodegradable material mainly composed of polylactic acid is a mixture of polylactic acid and other materials and the weight ratio of the other materials does not exceed 50%, the characteristics of polylactic acid When the biodegradable material mainly composed of polylactic acid is 100% polylactic acid, it is possible to provide a storage case that maximizes the excellent characteristics of polylactic acid. it can.

  In other words, by constructing the electrical product storage case with a biodegradable material mainly composed of polylactic acid, it is possible to make the storage case more transparent than with other biodegradable resins. It is suitable for storing electrical products such as tapes, optical disks, floppy disks, and electronic parts. Further, even if this storage case is discarded as it is, there is an effect that there is no concern that problems such as environmental pollution will occur.

  In this electrical product storage case, the members constituting the case are further fixed by screwing or fitting, or by being fixed with an adhesive so that they can be easily peeled off from each other. It can be easily separated into biodegradable materials and non-biodegradable materials. When the storage case is provided with an opening / closing lid, the storage case is supported by a pivot bearing so as to be rotatable, and the opening / closing lid is configured to be closed by rotating and fitting into the case body. Disassembling and dismantling of the case is extremely easy.

Therefore, according to the present invention, the following effects can be obtained.
(1) With regard to members made of biodegradable materials that make up electrical products or storage cases, there are a wide range of options for disposal methods, and they can be discarded as they are, or materials can be recycled like ordinary resins. .
Compared to the time and effort of dismantling with conventional small-sized products, the amount of material obtained is small, and because it is often made with inexpensive materials, material recycling is often not economically feasible. However, since the present invention has an option that can be discarded as it is, there is also an advantage in this aspect.

(2) Regarding the structural members made of non-biodegradable materials such as electronic components and substrates, the amount to be recycled is reduced by separating the biodegradable members, so that the processing cost is also reduced. Moreover, since the content rate of valuable metals, such as copper, increases relatively, it becomes a more valuable resource.

(3) Regarding biodegradable materials, even if discarded as they are, they will not remain as long-term waste and will not damage the landscape. Furthermore, since the biodegradable material does not contain harmful substances such as heavy metals and organochlorine compounds, there is no fear of generating harmful substances even if it is disposed of either by disposal or incineration. In the case where the biodegradable material is made from grain resources, there is also an advantage that no depleting resources such as oil are used. In addition, by placing waste products in an environment where the degradation of biodegradable materials accelerates, such as in a high-temperature and high-humidity environment, the housing etc. is naturally decomposed, and the parts that should be recycled biodegradable can be saved It can also be taken out.

  The present invention does not pollute the environment even if it is discarded as it is, and can provide an electrical product that has a very simplified disposal process and that has practically sufficient durability.

1 ... Remote commander, 2 ... Panel, 3 ... Case, 3a ... Hole, 4 ... Filter,
4a ... projection, 5 ... mounting substrate, 6 ... screw, 11 ... sleeve case, 12 ... upper case,
13 ... Lower case, 14 ... Mini-disc, 20 ... Push button body, 30 ... Push button,
31 ... Substrate, 32 ... Adhesive, 33 ... Spacer, 34 ... Adhesive,
35 ... Laminated film, 36 ... Screen printing layer, 37 ... Outermost surface layer (base material),
38 ... Conductive film, 50 ... Test stand, 51 ... Support member, B ... Deflection, S ... Test piece

Claims (5)

An electrical product comprising a casing made of sheet-like panels and cases, a mounting substrate accommodated between these panels and cases, and a structure attached to the case for imparting strength. ,
At least a part of the casing and the structure is made of a biodegradable material mainly composed of polylactic acid,
The mounting substrate is made of a non-biodegradable material, and is separably fixed to the housing with an adhesive that can be screwed or fitted or removed easily in the housing.
The panel has a convex operation push button and a conductive film thermocompression bonded to the back surface of the operation push button, and is easily fixed by being peeled off to the mounting substrate with an adhesive. The operation push button and the conductive film binder are made of a biodegradable material, and the conductive film binder is lower than the biodegradable material mainly composed of polylactic acid constituting the operation push button. An electric product characterized by having a heat softening point.   The electrical product according to claim 1, wherein the biodegradable material mainly composed of polylactic acid is a mixture of polylactic acid and another material, and the weight ratio of the other material does not exceed 50%.   The electric product according to claim 2, wherein the other material is one or a plurality of materials arbitrarily selected from the group consisting of biodegradable organic substances other than polylactic acid and inorganic compounds.   The biodegradable organic substance other than the polylactic acid is one or more kinds arbitrarily selected from the group consisting of polybutylene succinate, polycaprolactone, aliphatic polyester, cellulose acetate biodegradable resin, polyvinyl alcohol and natural organic substances. The electrical product according to claim 3, wherein the electrical product is a material.   The electrical product according to claim 1, wherein the biodegradable material mainly composed of polylactic acid is composed only of polylactic acid.

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