JP2011040538A - Portable solar power generation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable solar power generation device that is easily manufactured at low manufacturing costs, and can set an angle formed by a solar cell panel and the ground to be an arbitrary angle. <P>SOLUTION: In the portable solar power generation device, one portion of a drawn polyolefin resin sheet is fixed onto the back of a solar power generation device in which the solar cell panel is installed, an edge is set to be a free end tongue for lamination, and the drawn polyolefin resin sheet is a shape-retaining material, where the drawn polyolefin resin sheet is bent by 180 or 90 degrees, is held for one minute, and then is released, and a bending return angle θ at a lapse of 5 minutes after the release is not more than 20 degrees each. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a portable solar power generation device that can be carried and used at any place.

  Solar cells that use solar energy are expected to be representative of clean energy sources, and are generally generated by laying solar power generators with solar cell panels installed on the side walls and roofs of ordinary houses and buildings. ing. Also, it is installed and used as a substitute for batteries in watches and calculators.

  Furthermore, recently, a lightweight and portable solar power generation apparatus that can be used as an independent power source indoors and outdoors such as a camping ground and a beach has been developed. As such a solar power generation device, for example, “a solar cell panel frame provided with a solar cell panel that receives sunlight, a handle provided in the solar cell panel frame, and the solar cell panel” A support unit that is pivotally attached to the back side of the solar cell panel of the frame and that can set an angle formed by the solar cell panel and the ground surface when in use; The solar power generation device fixed to the part "(for example, refer to Patent Document 1) has been proposed.

  However, in the above solar power generation device, since the angle formed by the solar cell panel and the ground is set by the support part rotatably attached to the back side of the solar cell panel, a large number of components are manufactured. Is difficult and expensive to manufacture. In addition, the angle between the solar cell panel and the ground can be set only to a specific angle.

JP 2006-278460 A

  In view of the above problems, an object of the present invention is to provide a portable solar power generation apparatus that is easy to manufacture and low in manufacturing cost, and that can set an angle between a solar cell panel and the ground to an arbitrary angle.

That is, the present invention
[1] A stretched polyolefin resin sheet is partially bonded to the back surface of a solar power generation apparatus on which a solar cell panel is installed, and ends thereof are laminated as free end tongue pieces. The sheet is bent and held at 180 degrees or 90 degrees and held for 1 minute and then released, and the shape-retaining material has a folding return angle θ of 20 degrees or less when 5 minutes have passed after release. Type solar power generator,
[2] The portable solar light according to [1], wherein the stretched polyolefin resin sheet is obtained by stretching a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 to a stretch ratio of 5 times or more. Power generator,
[3] A stretched polyolefin resin sheet is formed by uniaxially stretching a total stretch ratio of 10 to 40 times after a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 is rolled to a rolling ratio of 5 times or more. The portable solar power generator according to [1] above, and
[4] The portable solar light according to [1], wherein the stretched polyolefin resin sheet is obtained by rolling a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 to a rolling ratio of 5 times or more. It relates to a power generator.

  The configuration of the portable solar power generation device of the present invention is as described above, and is easy to manufacture and low in manufacturing cost. Since the angle formed by the solar cell panel and the ground can be set to an arbitrary angle, it is possible to generate power efficiently. it can.

It is a side view which shows an example of the portable solar power generation device of this invention. It is a rear view which shows an example of the portable solar power generation device of this invention. It is a side view which shows an example of the state which bent the free end tongue piece of the extending | stretching polyolefin-type resin sheet of the portable solar power generation device of this invention. It is a top view which shows an example of the state which mounted the portable solar power generation device of FIG. 3 on the plane.

  Next, the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an example of the portable solar power generation device of the present invention, and FIG. 2 is a rear view of the portable solar power generation device in FIG. FIG. 3 is a side view showing an example of a state in which the free end tongue piece of the stretched polyolefin resin sheet of the portable solar power generation device of FIG. 1 is bent, and FIG. 4 shows the portable solar power generation device of FIG. It is a top view which shows an example of the state mounted on the plane.

  In the figure, reference numeral 1 denotes a solar power generation apparatus in which a solar cell panel is installed, and a stretched polyolefin resin sheet 2 is adhered and laminated on the back surface by an adhesive layer 3. The adhesive layer 3 is adhered only to the center portion of the stretched polyolefin resin sheet 2, and both ends of the stretched polyolefin resin sheet 2 are laminated as free end tongue pieces.

  The stretched polyolefin-based resin sheet 2 is a shape-retaining material that is bent at 180 degrees or 90 degrees and held for 1 minute and then released, and the folding return angle θ is less than 20 degrees when 5 minutes have passed after the release. is there.

  The above-mentioned stretched polyolefin resin sheet has shape retainability, but the shape retainability is released after folding the stretched polyolefin resin sheet at 180 degrees or 90 degrees and holding it for 1 minute, and 5 minutes have passed since release. The bending return angle θ is 20 degrees or less, preferably the 180-degree bending return angle θ is 20 degrees or less, and the 90-degree bending return angle θ is less than 20 degrees, more preferably 180-degree bending. The return angle θ is 20 degrees or less and the 90-degree bending return angle θ is 15 degrees or less. If one of the bending return angles θ at the time of 180-degree and 90-degree bending, particularly the 90-degree bending return angle θ exceeds 20 degrees, sufficient shape retention may not be obtained.

  As the polyolefin-based resin constituting the stretched polyolefin-based resin sheet, any olefin-based resin having a film forming ability can be used. For example, a high-density polyethylene resin, a medium-density polyethylene resin, a low-density polyethylene resin, a linear low-density Polyethylene resin, polypropylene resin, ethylene-propylene copolymer, ethylene-butene-1 copolymer, ethylene-pentene-1 copolymer, ethylene-hexene-1 copolymer, ethylene-octene-1 copolymer, ethylene -Vinyl acetate copolymer, ethylene- (meth) acrylic ester copolymer, ethylene-vinyl chloride copolymer, ethylene-propylene-butene copolymer, etc. High density polyethylene resin and polypropylene resin are preferred. used.

  When the weight average molecular weight of the polyolefin resin is less than 100,000, the polyolefin resin becomes brittle and the stretchability is lowered, or a stretched polyolefin resin sheet having sufficient mechanical strength or creep resistance is obtained. On the contrary, when it exceeds 500,000, the melt viscosity becomes high, the hot melt molding processability is lowered, and it becomes difficult to obtain a uniform sheet, and therefore 100,000 to 500,000 is preferable. In the present invention, the weight average molecular weight is a value measured by gel permeation chromatography (GPC).

The melt index (hereinafter referred to as MI) of the polyolefin resin is preferably from 0.1 to 20 (g / 10 minutes), more preferably from 0.2 to 10 (g / 10 minutes), which is excellent in film moldability. It is. MI is an index representing the melt viscosity of a thermoplastic resin specified in JIS K 7210. Furthermore, in the case of a high density polyethylene resin, 0.94 g / cm ³ or more is preferable because the mechanical strength does not improve even if the density is reduced even if the density is reduced.

  As the stretched polyolefin resin sheet, a stretched polyolefin resin sheet having a shape-retaining property in which a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 is uniaxially stretched at a stretch ratio of 5 times or more is preferable.

  In this case, the polyolefin resin is preferably a high-density polyethylene resin having an intrinsic viscosity [η] of less than 3.5 dl / g, such as glass fiber, talc, mica, calcium carbonate, magnesium hydroxide, alumina, zinc oxide, magnesium oxide, It is preferable to add inorganic machine fillers such as aluminum hydroxide, silica alumina, titanium oxide, calcium oxide, calcium silicate, basic magnesium carbonate, carbon fiber, and carbon black.

  The thickness of the polyolefin resin sheet before stretching is not particularly limited, but if it is too thick, stretching becomes difficult. Conversely, if it is too thin, the thickness of the polyolefin resin sheet after stretching becomes too thin. Since shape retention property falls, 0.2-15.0 mm is desirable.

  The stretched polyolefin resin sheet that has been stretched may have a stretch ratio of 5 times or more and have shape retention, but is preferably 10 to 40 times. The stretching method may be any conventionally known method, such as a method of stretching while heating with a heater or hot air by a uniaxial stretching method such as a roll uniaxial stretching method or a zone uniaxial stretching method. .

  When stretching uniaxially to a high degree of 10 to 40 times, a multistage uniaxial stretching method in which uniaxial stretching is repeated a plurality of times is preferable. When performing multistage uniaxial stretching, the number of stretching is preferably 2 to 20 times, more preferably 3 to 15 times, still more preferably 4 to 10 times. When performing multi-stage stretching by a roll uniaxial stretching method, it is desirable to install a feeding pinch roll, a take-up pinch roll, and at least one, preferably a plurality of contact rolls that rotate at a constant speed between these rolls. By installing such a contact roll, uniform stretchability is improved and stable stretch molding can be performed.

  The contact roll performs uniaxial stretching by applying a frictional force to the polyolefin resin sheet without being pinched. Further, the contact roll may be connected to the feeding roll and / or the take-up roll by a connecting member made of a gear, a chain, a pulley, a belt, or a combination thereof.

  The uniaxial stretching temperature cannot be uniformly stretched when it is low, and the sheet melts and cuts when it is high. Therefore, the range of “melting point−60 ° C.” to the melting point of the polyolefin resin of the polyolefin resin sheet to be stretched is more preferable, It is “melting point−50 ° C.” to “melting point−5 ° C.” of the polyolefin resin.

  In order to improve the dimensional stability of the stretched polyolefin resin sheet, the stretched polyolefin resin sheet may be annealed at a temperature between “melting point−60 ° C.” and melting point of the polyolefin resin. If the annealing temperature is lowered, the dimensional stability will not improve, warping will occur if used for a long time, and if it is raised, the polyolefin resin will dissolve and the orientation will disappear and the tensile modulus, tensile strength, etc. will decrease. It is preferable to anneal at a temperature between the “melting point−60 ° C.” and the melting point of the resin.

  Annealing is a heat treatment in the production line. When annealing, the stretched polyolefin resin sheet is stretched if a large tension is applied, and it is not stretched or shrinks in a very small state. The length of the stretched polyolefin resin sheet in the stretching direction is preferably substantially unchanged, and it is preferable that no pressure is applied to the stretched polyolefin resin sheet. That is, it is preferable to anneal so that the length of the annealed stretched polyolefin resin sheet is 1.0 or less of the length of the stretched polyolefin resin sheet before annealing.

  Accordingly, when the stretched polyolefin resin sheet is continuously annealed while being moved in the heating chamber with a roll such as a pinch roll, the feed rate ratio of the polyolefin resin sheet on the inlet side and the outlet side is 1.0 or less. It is preferable to anneal with setting.

  The heating method at the time of annealing is not particularly limited, and examples thereof include a method of heating with hot air, a heater, a heating plate, hot water or the like. The time for annealing is not particularly limited, and varies depending on the thickness of the stretched polyolefin resin sheet and the annealing temperature, but is generally preferably 10 seconds or more, more preferably 30 seconds to 60 minutes, and still more preferably 1 to 20 Minutes.

  Further, as a different preferred stretched polyolefin resin sheet, a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 was rolled to a rolling ratio of 5 times or more, and then the total stretching ratio was uniaxially stretched to 10 to 40 times. A stretched polyolefin resin sheet may be mentioned.

  The thickness of the polyolefin-based resin sheet before rolling is not particularly limited, but if it is too thick, stretching becomes difficult, and in the rolling process, a large pressing force is required to crush the polyolefin-based resin sheet with a rolling roll. Take-up force is required, and uniform rolling in the width direction may be difficult due to bending of the rolling roll. Conversely, when too thin, the thickness of the polyolefin resin sheet after rolling becomes too thin and uniform rolling. Is not only difficult, but also the rolling rolls may come into contact with each other to shorten the life of the rolling roll, so 0.2-15.0 mm is desirable.

  The polyolefin resin sheet is first rolled to a rolling ratio of 5 times or more. However, the rolling temperature cannot be uniformly rolled when the temperature is lowered, and melted and cut when the temperature is high. The range of “melting point −40 ° C.” to the melting point of the olefin resin of the polyolefin resin sheet is more preferable, and more preferably “melting point −30 ° C.” to “melting point −5 ° C.” of the olefin resin. In the present invention, the melting point refers to the maximum point of the endothermic peak that accompanies melting of the crystal, which is recognized when thermal analysis is performed with a differential scanning calorimeter (DSC).

  If the applied pressure (linear pressure) applied to the polyolefin resin sheet by the rolling roll is too small, it may not be possible to obtain a predetermined rolling magnification, and conversely if it is too large, not only will the bending of the rolling roll occur, Sliding easily occurs between the rolling roll and the raw sheet, and uniform rolling may be difficult. Therefore, the applied pressure is preferably 100 MPa to 3000 MPa, and more preferably 300 MPa to 1000 MPa.

  When the rolling ratio is less than 5 times, the effect of suppressing necking at the time of uniaxial stretching performed later cannot be obtained, high-strength uniaxial stretching cannot be performed, or the uniaxial stretching step Therefore, it is 5 times or more, preferably 7 times or more. There is no particular upper limit to the rolling ratio, but the higher the rolling ratio is, the more load is applied to the rolling equipment, so 10 times or less is preferable. The rolling magnification is defined as (cross-sectional area of polyolefin resin sheet) / (cross-sectional area of polyolefin resin sheet after rolling), but the width of the polyolefin resin sheet hardly changes before and after rolling. (Thickness of resin sheet) / (thickness of polyolefin resin sheet after rolling).

  The rolled polyolefin resin sheet is then uniaxially stretched at a total stretch ratio of 10 to 40 times. The uniaxial stretching method is not particularly limited, and the above-described uniaxial stretching method may be adopted. Moreover, since the total draw ratio is 10 to 40 times, the uniaxial draw ratio may be determined so that the total draw ratio is within this range in consideration of the rolling ratio. Is not improved, it is preferably 1.3 times or more, more preferably 1.5 times or more, and still more preferably 1.8 times or more. Moreover, although an upper limit is not specifically limited, 4 times or less are preferable, More preferably, it is 3.5 times or less. The total draw ratio is a numerical value obtained by multiplying the rolling ratio and the uniaxial draw ratio.

  Another preferred stretched polyolefin resin sheet is a stretched polyolefin resin sheet obtained by rolling a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 to a rolling ratio of 5 times or more. That is, even if it is not uniaxially stretched only by rolling, it is released after being bent at 180 degrees and 90 degrees and held for 1 minute, and the folding return angle θ when 5 minutes have elapsed after release is both 20 degrees or less. A stretched polyolefin resin sheet having shape retention can also be suitably used.

  The thickness of the polyolefin resin sheet before rolling is not particularly limited, but if it is too thick, a large pressing force and take-up force are required to crush the polyolefin resin sheet with a rolling roll in the rolling process. Uniform rolling in the width direction may be difficult due to roll deflection, etc. Conversely, if too thin, not only will the thickness of the polyolefin resin sheet after rolling become too thin, making uniform rolling difficult. Since the rolling rolls may come into contact with each other and the life of the rolling roll may be shortened, 0.2 to 15.0 mm is desirable.

  In order to improve the dimensional stability of the stretched polyolefin resin sheet stretched by the stretching method including the rolling step, the stretched polyolefin resin sheet has a melting point of “melting point−60 ° C.” to a melting point of the polyolefin resin, and a rolling temperature. You may anneal at the following temperature.

  If the annealing temperature is lowered, the dimensional stability will not improve, warping will occur if used for a long time, and if it is raised, the polyolefin resin will dissolve and the orientation will disappear and the tensile modulus, tensile strength, etc. will decrease. It is preferable to anneal the resin at a temperature ranging from “melting point −60 ° C.” to the melting point and not higher than the rolling temperature. Other annealing methods are as described above.

  The annealed stretched polyolefin resin sheet may be further aged in the temperature range from 40 ° C. to the melting point of the polyolefin resin. The dimensional stability of the polyolefin resin sheet annealed by aging becomes more excellent.

  Aging is not a continuous treatment in the production line, but it is a relatively long time (minutes, time units) for heat treatment of single-wafers, scrolls, etc., once processed, such as cut winding, of a stretched polyolefin resin sheet. It means to lay down carefully and heat-treat. The aging temperature is the same as that left at room temperature when the temperature is low, and when it is high, it is thermally deformed, so the temperature range is from 40 ° C. to the melting point of the polyolefin resin. Even if an effect does not increase, 12 hours-7 days are preferable.

  The thickness of the stretched polyolefin resin sheet is not particularly limited, but is preferably 0.04 to 2 mm because the shape retainability decreases as the thickness decreases.

  If necessary, heat treatment agent, heat resistance improver, light stabilizer, ultraviolet absorber, antioxidant, antistatic agent, impact modifier, antifogging agent, flame retardant, colorant, etc. May be added.

  The stretched polyolefin resin sheet may be a laminated stretched polyolefin resin sheet obtained by laminating two or more of the above stretched polyolefin resin sheets. The stretching directions of the stretched polyolefin resin sheets laminated may be the same or different.

  As a laminated stretched polyolefin resin sheet in which a plurality of stretched polyolefin resin sheets having different stretching directions are laminated, for example, a laminated stretched polyolefin resin in which two stretched polyolefin resin sheets are laminated so that the stretching directions are orthogonal to each other Sheet, laminated stretched polyolefin resin sheet in which three stretched polyolefin resin sheets are laminated by shifting the stretching direction by 60 degrees, and laminate in which four stretched polyolefin resin sheets are laminated by shifting the stretching direction by 45 degrees Examples thereof include a stretched polyolefin resin sheet.

  The stretched polyolefin-based resin sheet has shape retention when bent in a direction perpendicular to the stretching direction, and when two or more stretched polyolefin-based resin sheets having different stretching directions are bonded, two or more stretched polyolefins The shape-retaining property in an arbitrary direction is improved by the stretching direction of the resin-based resin sheet, and the stretched polyolefin-based resin sheet is hardly broken even if the stretching direction and the bending direction of the stretched polyolefin-based resin sheet are the same.

  The method of laminating the stretched polyolefin resin sheet may be any conventionally known method, for example, a method in which the second polyolefin resin sheet is supplied between the stretched polyolefin resin sheets and thermally bonded, Examples thereof include a method in which a second polyolefin resin is melt-extruded and bonded and laminated between stretched polyolefin resin sheets.

  As the second polyolefin resin, since the stretched polyolefin resin sheet is adhered, the same type of polyolefin resin as that constituting the stretched polyolefin resin sheet is preferable. Since it acts as an adhesive when heat-sealing, a polyolefin resin having a melting temperature lower than the melting temperature of the polyolefin resin constituting the stretched polyolefin resin sheet is preferable, and a linear low density polyethylene resin is preferable.

  The thickness of the second polyolefin resin (sheet) is not particularly limited. However, if the thickness is too thin, it is difficult to adhere, and if it is too thick, the shape-retaining property of the stretched polyolefin resin sheet is lowered. It is -150 micrometers, Preferably it is 20-80 micrometers.

  The laminated stretched polyolefin resin sheet is also bent at 180 degrees and 90 degrees so as to be perpendicular to the stretching direction of at least one stretched polyolefin resin sheet of the laminated stretched polyolefin resin sheets. It is released after being held for a minute, and has a shape-retaining property in which the folding return angle θ is 5 degrees or less when 5 minutes have passed after the release.

  The thickness of the stretched polyolefin resin sheet is not particularly limited, but is preferably 0.04 to 2 mm because the shape retainability decreases as the thickness decreases. Since the laminated stretched polyolefin resin sheet laminates the above stretched polyolefin resin sheet, it is possible to produce a thick sheet. However, if it is too thick, it becomes difficult to bend and the shape retainability is lowered, so 0.08 to 4.0 mm is preferable. .

  Since the stretched polyolefin resin sheet has shape retention in the direction perpendicular to the stretch direction, the length direction of the stretched polyolefin resin sheet (the left-right direction of the stretched polyolefin resin sheet 2 in FIGS. 1 and 2). It is preferable that the stretching directions of the stretched polyolefin resin sheet coincide with each other. In the case of a laminated stretched polyolefin resin sheet, it is preferable that the stretching direction of at least one stretched polyolefin resin sheet constituting the laminated stretched polyolefin resin sheet and the length direction of the stretched polyolefin resin sheet are the same. .

  The adhesive layer 3 is a stretched polyolefin resin so that a part of the stretched polyolefin resin sheet 2 is fixed to the back surface of the photovoltaic power generator 1 and at least one end of the stretched polyolefin resin sheet 2 is a free end tongue. What is necessary is just to laminate | stack on a part of sheet | seat 2. FIG.

  The adhesive is not particularly limited as long as it is an adhesive capable of fixing the stretched polyolefin resin sheet to the back surface of the photovoltaic power generation device. For example, a hot melt adhesive such as polyester or polyolefin, reactive adhesive, etc. Adhesives, epoxy adhesives, urethane adhesives, polyester adhesives, and rubber-based, acrylic-based, urethane-based, and silicone-based pressure-sensitive adhesives. The thickness of the adhesive layer is generally 10 to 200 μm.

  A plurality of the stretched polyolefin resin sheets 2 may be laminated, and the shape and size of the stretched polyolefin resin sheet 2 are not particularly limited, and may be a size protruding from the side surface of the solar power generation device 1.

  Since the stretched polyolefin-based resin sheet 2 has a shape-retaining property, as shown in FIG. 3, when the free end tongue piece is bent, the bent shape can be held as it is. Therefore, when the solar power generation device 1 is placed on a flat surface after being bent into a predetermined shape, the solar power generation device 1 is held in a state having a predetermined angle as shown in FIG. Moreover, since bending, length, an angle, a shape, etc. can be changed as needed and the angle of the solar power generation device 1 can be changed, the angle of the solar power generation device 1 and sunlight is predetermined. Can be kept at any angle.

  Next, examples of the present invention will be described, but the present invention is not limited to the examples.

Example 1
A high-density polyethylene resin (manufactured by Nippon Polyethylene Co., Ltd.) having a weight average molecular weight (Mw) of 330,000 and a melting point of 135 ° C. is supplied to the same-direction biaxial kneading extruder (manufactured by Plastic Engineering Laboratory) and melt kneaded at a resin temperature of 200 ° C. After that, the melt-kneaded material was formed into a sheet having a width of 350 mm and a thickness of 11.3 mm using a calender molding machine in which the roll temperature was controlled at 110 ° C. to obtain a polyethylene resin sheet.

  The obtained polyethylene resin sheet was rolled at a rolling magnification of 10.3 times using a rolling molding machine (manufactured by Sekisui Koki Co., Ltd.) heated to 125 ° C. to obtain a rolled polyethylene resin sheet having a width of 350 mm and a thickness of 1.10 mm. It was. The obtained rolled polyethylene resin sheet was subjected to a multistage stretching of 1.72 times in a hot air heating type multistage stretching apparatus (manufactured by Kyowa Engineering) heated to 110 ° C., a total stretching ratio of 18 times, a width of 280 mm, and a thickness of 0 An 80 mm stretched polyethylene resin sheet was obtained.

  The obtained stretched polyethylene resin sheet was supplied with a pinch roll to a hot air heating tank with a line length of 19.25 m set at 125 ° C. at an inlet speed of 2.75 m / min, and an outlet speed of 2.75 m / min. Set to, and then subjected to primary annealing for 7 minutes, followed by secondary annealing in the same manner to obtain an annealed stretched polyethylene resin sheet, which is then fed to a constant temperature bath at 60 ° C. and aged for 24 hours, An aged stretched polyethylene resin sheet was obtained.

  The obtained stretched polyethylene resin sheet was cut into a width of 10 mm and a length of 150 mm, bent at 180 degrees and 90 degrees so as to be orthogonal to the stretching direction of the stretched polyethylene resin sheet, held for 1 minute, and then released. When the bending return angle θ was measured when minutes passed, it was 4 to 7 degrees, respectively.

  The obtained stretched polyethylene resin sheet was cut into a width of 20 mm and a length of 150 mm so that the stretching direction and the length direction coincided with each other, and an acrylic pressure-sensitive adhesive was applied to the central portion of one surface, and the width was 30 mm and the thickness was 40 μm. The adhesive layer was formed. In addition, the both ends of the stretched polyethylene resin sheet were cut | disconnected circularly.

  As shown in FIG. 2, the obtained stretched polyethylene resin sheet 2 was adhered to the back surface of the 170 × 170 mm solar power generator 1 to obtain a portable solar power generator. The stretched polyethylene resin sheet 2 is bonded by the adhesive layer 3 with an interval of 30 mm from the upper end portion of the photovoltaic power generator 1 and with an interval of 10 mm from both sides to form a free end tongue piece having a length of 60 mm on both sides. Has been.

  As shown in FIG. 3, the stretched polyethylene resin sheet 2 could be easily folded by hand, and the folded shape could be maintained. Further, after the stretched polyethylene resin sheet 2 is bent, the portable solar power generation device is placed on a desk, and as shown in FIG. 4, the portable solar power generation device can be held in an inclined state. did it.

  The portable solar power generation device of the present invention can be bent, length, angle, shape, etc. can be changed as necessary, and the angle of the solar power generation device can be changed. The angle between the solar power generation device and sunlight can be kept at a predetermined angle, and power can be generated efficiently anywhere.

DESCRIPTION OF SYMBOLS 1 Solar power generation device 2 Stretched polyethylene resin sheet 3 Adhesive layer

Claims (4)

  A part of the stretched polyolefin resin sheet is fixed to the back surface of the solar power generation apparatus on which the solar cell panel is installed, and the end portion is laminated as a free end tongue piece. The stretched polyolefin resin sheet is 180 Portable solar light, characterized in that it is a shape-retaining material that has a folding return angle θ of 20 degrees or less when 5 minutes have passed since the release. Power generation device.   The portable solar power generator according to claim 1, wherein the stretched polyolefin resin sheet is obtained by stretching a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 to a stretch ratio of 5 times or more.   The stretched polyolefin resin sheet is characterized in that a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 is rolled to a rolling ratio of 5 times or more and then uniaxially stretched to a total stretching ratio of 10 to 40 times. The portable solar power generation device according to claim 1.   2. The portable solar power generator according to claim 1, wherein the stretched polyolefin resin sheet is obtained by rolling a polyolefin resin sheet having a weight average molecular weight of 100,000 to 500,000 to a rolling ratio of 5 times or more.

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