JP2010089265A - Liquid holding thermoplastic resin hollow plate, method of manufacturing the same, and liquid holding plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid holding thermoplastic resin hollow plate excelling in sealing property at the peripheral edge part while exhibiting sufficient strength, and a method of manufacturing the liquid holding thermoplastic resin hollow plate, and a liquid holding plate. <P>SOLUTION: In the liquid holding thermoplastic resin hollow plate 10, facing protrusions 12 of a pair of thermoplastic resin sheet-like materials with the protrusions 12 of hollow frustum shape provided zigzag are stuck to each other to form a core material, and thermoplastic resin surface materials are heat-fused to both faces of the core material to form a thermoplastic rein plate. The whole peripheral edge part of the thermoplastic resin plate is provided with an inclined part 17 and a seal part 18 in sequence from the center toward the peripheral edge, and hollow parts 19 storing liquid such as water or a thermal storage agent are formed between the thermoplastic resin sheet-like materials and in the peripheral edge part. The ratio of weight per unit area of the thermoplastic resin surface material to the thermoplastic resin sheet-like material is preferably 1-3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a thermoplastic resin hollow plate material for holding a liquid material that is used as a heat storage plate material or a heat insulation plate material in which, for example, a heat storage agent or water is contained in a hollow portion, a manufacturing method thereof, and a liquid material holding plate material.

  In general, thermoplastic resins have the advantage of being lighter than metals, but on the other hand, they have the disadvantage of low strength and rigidity, so they have been devised to compensate for these disadvantages by adopting a honeycomb structure, etc. Yes. Since such a honeycomb structure has a space inside, it is possible to improve physical properties such as heat insulation.

As this type of material, a multilayer plate in which a laminated portion is formed on a thermoplastic resin, which is characterized by the end structure of the multilayer plate is known (for example, see Patent Document 1). . That is, the multilayer board has a multilayer structure composed of a base material made of a thermoplastic resin and a laminated portion laminated and integrated with the base material, with the end portion of the base material facing the laminated portion side. It has a standing end structure. And the said base material has the corrugated cardboard structure in which the hollow rib structure was formed continuously, ie, the hollow structure formed continuously. According to this multilayer board, it is lightweight, excellent in strength, and excellent in heat insulation.
JP 2007-331389 A (page 2, page 3 and page 6)

  In the multilayer plate described in Patent Document 1, since the tip of the standing end portion is inclined toward the surface layer side of the laminated portion, foreign matter can be prevented from entering the hollow rib structure, and dust resistance is also provided. However, since it is not assumed that liquids such as water and a heat storage agent are accommodated in the hollow portion, the sealing property is insufficient. Furthermore, the structure of the end portion of the multilayer plate is formed by heating and pressing the end portion when the multilayer plate is cut at the end portion, and the raised portion of the end portion is laminated. It is not in close contact with the surface layer of the part. Therefore, there is a problem that the sealing performance at the end of the multilayer board is lacking.

  The present invention has been made by paying attention to such problems existing in the prior art, and the object of the present invention is to exhibit sufficient strength and excellent sealing performance at the peripheral portion. The object is to provide a thermoplastic resin hollow plate material for holding a liquid material, a method for producing the same, and a liquid material holding plate material.

  In order to achieve the above object, the thermoplastic resin hollow plate material for holding a liquid material according to claim 1 has a pair of thermoplastic resin sheet-like materials in which protrusions having a hollow frustum shape are provided in a staggered manner. An inclined part and a seal part are sequentially formed from the center toward the peripheral direction on the entire peripheral part of the thermoplastic resin plate material in which the thermoplastic resin surface material is bonded to both surfaces of the core material formed by fixing the opposing protrusions to each other. And a hollow portion is provided between the thermoplastic resin sheet-like materials and in the peripheral portion.

  The thermoplastic resin hollow plate material for holding a liquid material according to claim 2 is the invention according to claim 1, wherein the ratio of the basis weight of the thermoplastic resin surface material to the thermoplastic resin sheet material is 1 to 3. It is characterized by.

The thermoplastic resin hollow plate material for holding a liquid material according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the volume ratio occupied by the hollow portion is 30 to 70%.
The thermoplastic resin hollow plate material for holding a liquid material according to claim 4 is the invention according to any one of claims 1 to 3, wherein an inclination angle of the inclined portion is 30 to 60 °. And

  The thermoplastic resin hollow plate material for holding a liquid material according to claim 5 is the invention according to any one of claims 1 to 4, wherein the width of the seal portion is set to 2 to 20 mm. Features.

The liquid material holding plate material according to claim 6 is characterized in that the liquid material is accommodated in the hollow portion of the liquid material holding thermoplastic resin hollow plate material according to any one of claims 1 to 5. And
In the method for producing a thermoplastic resin hollow plate material for holding a liquid material according to claim 7, a pair of thermoplastic resin sheet-like materials provided with a projecting body having a hollow frustum shape are fixed to each other. An inclined portion and a seal portion are sequentially formed from the center toward the peripheral direction on the entire peripheral portion of the thermoplastic resin plate material in which the thermoplastic resin surface material is bonded to both surfaces of the core material. It is a manufacturing method of the thermoplastic resin hollow board material for liquid substance holding | maintenance which has a hollow part in between and a peripheral part, Comprising: The process (1) which prepares the said thermoplastic resin board | plate material, and the peripheral part of the said thermoplastic resin board | plate material (2) forming the inclined portion by crushing, (3) forming the seal portion by heat-sealing the periphery of the inclined portion, and (4) cutting the entire periphery of the seal portion. It is characterized by providing.

The method for producing a thermoplastic resin hollow plate material for holding a liquid material according to claim 8 is characterized in that, in the invention according to claim 7, the step (2) and the step (3) are performed simultaneously.
The method for producing a thermoplastic resin hollow plate material for holding a liquid material according to claim 9 is characterized in that, in the invention according to claim 7, the steps (2) to (4) are performed simultaneously.

  In the method for producing a thermoplastic resin hollow plate material for holding a liquid material according to claim 10, in the invention according to any one of claims 7 to 9, in the step (4), the width of the seal portion is 2 It is set to ˜20 mm.

  In the method for producing a thermoplastic resin hollow plate material for holding a liquid material according to claim 11, in the invention according to any one of claims 7 to 10, in the step (3), the heat fusion is performed by heat. It is characterized by being performed within a temperature range of (T-50) to (T-30) ° C. and a pressure condition of 5 to 25 MPa with respect to the melting point T of the plastic resin.

According to the present invention, the following effects can be exhibited.
The thermoplastic resin hollow plate material for holding a liquid material according to the first aspect of the invention is a pair of thermoplastic resin sheet-like materials in which projections forming a hollow frustum shape are provided in a staggered manner, and the opposing projections are fixed to each other. It is formed of a thermoplastic resin plate material in which a thermoplastic resin surface material is bonded to both surfaces of the core material. For this reason, the strength of the core material is ensured by the protrusions arranged in a staggered manner, and the strength is further improved by the thermoplastic resin surface material on both surfaces of the core material. Further, since the inclined portion and the seal portion are sequentially formed from the center toward the peripheral direction on the entire peripheral portion of the thermoplastic resin plate material, the sealing performance at the peripheral portion can be improved by the seal portion. And liquid substances, such as water and a thermal storage agent, can be accommodated in the hollow part formed between the said thermoplastic resin sheet-like materials and in the peripheral part.

Therefore, the thermoplastic resin hollow plate material for holding a liquid material can exhibit sufficient strength and is excellent in sealing performance at the peripheral edge.
In the invention which concerns on Claim 2, the ratio of the fabric weight of the thermoplastic resin surface material with respect to a thermoplastic resin sheet-like material is set to 1-3. For this reason, in addition to the effect of the invention which concerns on Claim 1, while improving an intensity | strength, the sealing performance by a seal part can be improved.

  In the invention which concerns on Claim 3, the volume ratio which a hollow part accounts is a moderate range which is 30 to 70%. Therefore, the effect of the invention according to claim 1 or claim 2 can be exhibited while sufficiently securing the volume of the hollow portion.

  In the invention which concerns on Claim 4, the inclination-angle of an inclination part is the range around 45 degrees called 30-60 degrees. Therefore, in addition to the effect of the invention according to any one of claims 1 to 3, it is possible to suppress the bending and tearing of the thermoplastic resin surface material that is seen when the inclination angle is extreme.

  In the invention which concerns on Claim 5, the width | variety of the seal part is set to 2-20 mm. For this reason, in addition to the effect of the invention according to any one of claims 1 to 3, the sealing performance by the seal portion can be sufficiently exhibited.

  In the liquid material holding plate material of the invention according to claim 6, the liquid material is accommodated in the hollow portion of the liquid material holding thermoplastic resin hollow plate material. Therefore, for example, when a liquid material such as water or a heat storage agent is accommodated in the hollow portion, a heat insulating effect or a heat storage effect can be exhibited.

  In the manufacturing method of the thermoplastic resin hollow plate material for holding a liquid material of the invention according to claim 7, the step (1) of preparing the thermoplastic resin plate material, and the peripheral portion of the thermoplastic resin plate material are crushed to form an inclined portion. A step (2), a step (3) of thermally sealing the periphery of the inclined portion to form a seal portion, and a step (4) of cutting the entire periphery of the seal portion. Therefore, the thermoplastic resin hollow plate material for holding a liquid material that exhibits the above-described effects can be efficiently manufactured.

  In the invention which concerns on Claim 8, a process (2) and a process (3) are performed simultaneously. Accordingly, one step can be omitted, and the production efficiency of the thermoplastic resin hollow plate material for holding a liquid material can be improved.

  In the invention which concerns on Claim 9, a process (2)-a process (4) are performed simultaneously. As a result, two steps can be omitted, and the production efficiency of the thermoplastic resin hollow plate material for holding a liquid material can be further improved.

  In the invention which concerns on Claim 10, the width | variety of a seal part is set to 2-20 mm in a process (4). For this reason, in addition to the effect of the invention according to any one of claims 7 to 9, it is possible to easily manufacture a thermoplastic resin hollow plate material for holding a liquid material that can sufficiently exhibit sealing properties.

  In the invention according to claim 11, in the step (3), the thermal fusion is performed within the temperature range of (T-50) to (T-30) ° C. with respect to the melting point T of the thermoplastic resin, It is carried out under a pressure condition of 25 MPa. Therefore, in addition to the effects of the invention according to any one of claims 7 to 10, an appropriate temperature and pressure for thermal fusion can be set for the thermoplastic resin to be used, and sufficient sealing by the seal portion can be achieved. Sex can be secured.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments that are considered to be the best of the present invention will be described below in detail with reference to the drawings.
As shown in FIG. 1, the thermoplastic resin hollow plate material 10 for holding a liquid material is formed in a square plate shape having a planar square shape. As shown in FIGS. 4A and 4B, the thermoplastic resin sheet material 11 made of polypropylene resin has a large number of protrusions 12 formed so as to project into a hollow truncated cone shape on one surface (upper surface). They are arranged in a staggered pattern at regular intervals. Each protrusion 12 has a hollow shape having an opening 13 on the bottom 12a side, and is formed in a tapered shape having a diameter that gradually increases from the top 12b to the bottom 12a. The taper angle is preferably 40 to 80 °, more preferably 60 to 75 °. When the taper angle is less than 40 ° or exceeds 80 °, the pressure resistance of the protrusion 12 is lowered.

  The protrusion 12 is usually set such that the top 12b has a diameter of 1 to 4 mm, the bottom 12a has a diameter of 3 to 16 mm, and a height of 3 to 13 mm. Moreover, it is preferable that the space | interval between the protrusions 12 is 10 mm or less. When the interval between the protrusions 12 exceeds 10 mm, the pressure resistance of the thermoplastic resin sheet-like material 11 is lowered and is likely to be deformed. It is preferable that the thickness of the thermoplastic resin sheet 11 is 0.1 to 1 mm. If the thickness is less than 0.1 mm, sufficient rigidity cannot be obtained, and the desired projection 12 cannot be obtained. If the thickness is greater than 1 mm, it is difficult to mold the projection 12.

  The shape of the protrusion 12 may be a hollow frustum shape, and may be a hollow pyramid shape such as a hollow quadrangular frustum shape or a hollow hexagonal frustum shape. FIG. 4C is a perspective view showing the thermoplastic resin sheet 11 upside down. The thermoplastic resin sheet 11 is formed from a thermoplastic resin sheet using a molding machine such as a roll molding machine in accordance with a conventional method so that the protrusions 12 are formed on one surface. The pair of thermoplastic resin sheet materials 11 are formed by core-bonding 14 by thermally fusing and fixing the top portions 12b of the projecting bodies 12 facing each other.

  As shown in FIG. 3, a thermoplastic resin surface material 15 made of polypropylene resin is bonded to both surfaces of the core material 14 by heat fusion to form a thermoplastic resin plate material 16. The thermoplastic resin forming the thermoplastic resin sheet 11 and the thermoplastic resin surface material 15 is not particularly limited, and various thermoplastic resins can be used. Examples of the thermoplastic resin include polyolefin resins such as polyethylene resin, polypropylene resin, and ethylene-propylene copolymer resin, polyvinyl chloride resin, polystyrene resin, polycarbonate resin, ABS resin, and polyamide resin. Among these thermoplastic resins, considering the balance of physical properties, moldability, cost, and the like, polyolefin resins, particularly polypropylene resins are preferable, and polycarbonate resins are preferable when performance such as self-extinguishing properties is required. An inorganic filler such as calcium carbonate or talc can be blended with the thermoplastic resin in order to enhance performance such as strength and rigidity. Other additives such as flame retardants, ultraviolet absorbers, heat ray absorbers, light stabilizers, antioxidants, lubricants, antistatic agents, and pigments can be added to the thermoplastic resin.

  For the thermoplastic resin sheet 11 and the thermoplastic resin surface material 15, it is preferable to use compatible homogeneous materials in order to increase the bonding strength when bonded by thermal fusion. For example, it is preferable that both the thermoplastic resin sheet 11 and the thermoplastic resin surface material 15 are formed of an olefin resin. In this case, the temperature and pressure conditions at the time of heat fusion can be easily set, and the bonding strength after heat fusion can be improved.

  As shown in FIGS. 1 and 2, an inclined portion 17 and a seal portion 18 are sequentially formed from the center toward the peripheral direction on the entire peripheral portion of the thermoplastic resin plate material 16. The inclined portion 17 is inclined by an inclination angle θ with respect to the center line of the core member 14 (a line connecting the centers of the top 12b joints of the protrusions 12), and the seal portion 18 extends along the center line of the core member 14. Yes. By providing the inclined portion 17 between the thermoplastic resin plate material 16 and the seal portion 18, the reinforcing effect of suppressing the occurrence of scratches and tears at the peripheral edge portion of the liquid material holding thermoplastic resin hollow plate material 10 is exhibited. be able to.

  The inclined portion 17 is formed at a predetermined inclination angle θ by crushing the peripheral edge portion of the thermoplastic resin plate material 16. The inclination angle θ is preferably 30 to 60 °. When the inclination angle θ is less than 30 °, the seal portion 18 becomes long, which is not preferable because the seal portion 18 is easily bent or easily damaged. On the other hand, when it exceeds 60 °, the thermoplastic resin surface material 15 tends to be easily broken due to the influence of the protrusion 12.

  The seal portion 18 is formed by heat-sealing the outer peripheral portion from the inclined portion 17. The width of the seal portion 18 is preferably 2 to 20 mm in order to ensure sealing performance. When the width of the seal portion 18 is less than 2 mm, the sealing performance of the seal portion 18 is insufficient and there is a risk of liquid leakage. On the other hand, when the width of the seal portion 18 exceeds 6 mm, a sufficient sealing performance can be ensured, but the width of the seal portion 18 becomes too long and the handleability deteriorates.

  The ratio of the basis weight of the thermoplastic resin surface material 15 with respect to the thermoplastic resin sheet-like material 11 is set to 1 to 3 in order to maintain the strength of the thermoplastic resin hollow plate material 10 for holding a liquid material and to improve the sealing performance. The When the ratio of the basis weight is less than 1, the thickness of the seal portion 18 of the liquid material-holding thermoplastic resin hollow plate 10 becomes thin, and the sealing performance is lowered. On the other hand, when the ratio of the basis weight exceeds 3, the strength of the core material 14 is insufficient as compared with the strength of the thermoplastic resin surface material 15, the thickness of the seal portion 18 is increased, and the sealing performance is also lowered.

  In the thermoplastic resin hollow plate material 10 for holding a liquid material, hollow portions 19 are formed between the thermoplastic resin sheet-like materials 11 and in the peripheral edge portion, and liquid materials such as water and a heat storage agent are accommodated therein. The volume ratio occupied by the hollow portion 19 is preferably 30 to 70%. When the volume ratio is less than 30%, the amount of the liquid material accommodated in the hollow portion 19 is small, which is not preferable because the volume efficiency is deteriorated. On the other hand, when the volume ratio exceeds 70%, the capacity of the liquid material accommodated in the hollow portion 19 is sufficient, but the strength of the thermoplastic resin hollow plate material 10 for retaining a liquid material is not preferable. In addition, the space | gap part 25 is formed between the thermoplastic resin sheet-like material 11 and the thermoplastic resin surface material 15 (part in which the projection body 12 is not formed), and can improve a heat insulation function, a heat storage function, etc. It is configured as follows. The surface of the thermoplastic resin plate 16 is flattened by bonding the thermoplastic resin surface material 15 to both surfaces of the core material 14, thereby closing the gap 25 with the thermoplastic resin surface material 15. Handleability is improved.

  In the thermoplastic resin hollow plate material 10 for holding a liquid material, the fracture strength of the seal portion 18 is preferably 1 to 2 MPa in practice. When the breaking strength is less than 1 MPa, the strength of the seal portion 18 is insufficient, and there is a possibility that the seal portion 18 may be damaged when a liquid material is contained in the hollow portion 19 and used. On the other hand, when the breaking strength exceeds 2 MPa, the thermoplastic resin sheet-like material 11 and the thermoplastic resin surface material 15 must be thickened, and the workability is deteriorated and the sealing property is also lowered.

  A liquid material is accommodated in the hollow part 19 of the thermoplastic resin hollow plate material 10 for holding a liquid material, thereby forming a liquid material holding plate material 20. As the liquid material, water, a heat storage agent, or the like is used. In this case, for example, the liquid material is obtained by cutting off the seal portion 18 located at the corner of the thermoplastic resin hollow plate material 10 for holding the liquid material, injecting the liquid material therefrom, and then heat-sealing and sealing the portion after the injection. The holding plate 20 can be configured. Further, as shown in FIG. 5A, a horizontal joint 21 is attached to one side edge and the other side edge of the thermoplastic resin hollow plate material 10 for holding a liquid material to form a supply port and a discharge port. The hose 22 is attached to the joints 21 as shown in FIG. The liquid material holding plate member 20 can be configured such that the liquid material is injected from the supply port and discharged from the discharge port. In this case, the extending direction of the joint 21 and the hose 22 is the same direction as the extending direction of the surface of the liquid material holding plate 20.

  Further, as shown in FIG. 6 (a), the vertical joint 23 is attached to one side and the other side of the thermoplastic resin hollow plate 10 for holding the liquid material to form a supply port and a discharge port. As shown, the hose 22 is attached to the joints 23. The liquid material holding plate member 20 can also be configured by injecting a liquid material from the supply port and discharging the liquid material from the discharge port. In this case, the extending direction of the joint 23 and the hose 22 is a direction orthogonal to the upper surface of the liquid material holding plate material 20. By using water or a heat storage agent as the liquid material, the liquid material holding plate material 20 can be used as a heat insulating material, a heat storage material, a heat insulating material, or the like.

Next, the manufacturing method of the thermoplastic resin hollow plate material 10 for holding a liquid material will be described.
The manufacturing method of the thermoplastic resin hollow plate material 10 for holding a liquid material includes a step (1) of preparing the thermoplastic resin plate material 16 and a step of crushing the peripheral portion of the thermoplastic resin plate material 16 to form the inclined portion 17 (2 ), A step (3) of forming the seal portion 18 by thermally fusing the periphery of the inclined portion 17, and a step (4) of cutting the entire periphery of the seal portion 18.

  In step (1), as shown in FIG. 7A, the top portions 12b of the protrusions 12 of the pair of thermoplastic resin sheet-like materials 11 are made to face each other, and the top portions 12b of both protrusions 12 are abutted to each other. The core material 14 is prepared by fusing. Thereafter, as shown in FIG. 7B, a thermoplastic resin plate material 16 is prepared by thermally fusing and bonding the thermoplastic resin surface material 15 to both surfaces of the core material 14.

  In step (2), as shown in FIG. 7 (c), the peripheral portion of the thermoplastic resin plate 16 obtained in step (1) is formed on a metal frame 28 having a tapered surface 26 and a seal surface 27 at a predetermined angle. To form an inclined portion 17 having a predetermined inclination angle θ.

In the step (3), as shown in FIG. 7D, the peripheral portion of the inclined portion 17 is heat-sealed with the seal surface 27 of the metal frame 28 to form the seal portion 18.
In the step (4), as shown in FIG. 7 (d), the cutting portion 24 on the entire periphery of the seal portion 18 is cut with a cutting blade 29, whereby the liquid holding heat as shown in FIGS. The plastic resin hollow plate material 10 is manufactured.

  The step (2) and the step (3) can be performed simultaneously using the metal frame 28 having the tapered surface 26 and the seal surface 27. At this time, the inclined portion 17 is formed at the peripheral portion of the thermoplastic resin plate material 16 and the seal portion 18 is formed at the peripheral portion.

  Furthermore, the said process (2)-process (4) perform these processes (2)-process (4) simultaneously by providing the cutting blade 29 in a peripheral part rather than the sealing surface 27 of the said metal frame 28. FIG. Can do. At this time, the inclined portion 17 and the seal portion 18 are formed at the peripheral portion of the thermoplastic resin plate 16, and at the same time, the peripheral portion of the seal portion 18 is cut at the cutting portion 24 by the cutting blade 29.

  In the manufacturing method of the thermoplastic resin hollow plate material 10 for holding a liquid material, the inclination angle θ of the inclined portion 17 is preferably set to 30 to 60 °, and the width of the seal portion 18 is preferably set to 2 to 20 mm.

  In the step (3), the thermal fusion is performed within a temperature range of (T-50) to (T-30) ° C. and a pressure condition of 5 to 25 MPa with respect to the melting point T of the thermoplastic resin. Is preferred. In the case where the thermoplastic resin is polypropylene, the melting point is, for example, 164 ° C. (T = 164), and therefore the temperature of heat fusion is 114 to 134 ° C. By performing heat fusion under such temperature and pressure conditions, the sealing performance of the seal portion 18 can be sufficiently obtained, and the seal portion 18 can be formed in a short time.

  When the temperature at the time of thermal fusion is lower than (T-50) ° C., the temperature becomes too low, the thermoplastic resin becomes insufficiently melted, and the bonding strength by thermal fusion is lowered. On the other hand, when the temperature at the time of heat fusion exceeds (T-30) ° C., the temperature becomes too high, and the seal portion 18 is deformed or the thermoplastic resin is deteriorated.

  Moreover, when the pressure at the time of heat fusion is lower than 5 MPa, heat fusion is not performed favorably and the joint strength of the seal part 18 by heat fusion falls. On the other hand, when the pressure at the time of heat-sealing is higher than 25 MPa, the seal portion 18 is easily crushed, the predetermined thickness cannot be maintained, and the sealing performance is lowered.

The actions and effects exerted by the above embodiment are summarized below.
The liquid material-holding thermoplastic resin hollow plate material 10 of the present embodiment has a pair of thermoplastic resin sheet-like materials 11 in which the projecting bodies 12 having a hollow frustum shape are provided in a staggered manner, and the projecting bodies 12 facing each other. It is formed of a thermoplastic resin plate material 16 in which a thermoplastic resin surface material 15 is bonded to both surfaces of a core material 14 formed by adhering to the core material 14. For this reason, the core member 14 can exhibit uniform strength and rigidity by the protrusions 12 arranged in a staggered manner, and can improve compression performance and bending performance. In addition, mechanical properties such as strength and rigidity of the thermoplastic resin plate material 16 can be improved by the thermoplastic resin surface material 15 on both surfaces of the core material 14.

  Further, since the inclined portion 17 and the seal portion 18 are sequentially formed from the center toward the peripheral direction on the entire peripheral edge portion of the thermoplastic resin plate material 16, the sealing performance can be improved by the seal portion 18. . In addition, the hollow portion 19 and the gap portion 25 can reduce the weight. And liquid substances, such as water and a thermal storage agent, can be accommodated in the hollow part 19 formed between the said thermoplastic resin sheet-like objects 11 and in the peripheral part. Since the hollow portion 19 is uniformly formed in the liquid material holding plate material 20, the liquid material can be uniformly accommodated in the liquid material holding plate material 20.

Therefore, the thermoplastic resin hollow plate material 10 for holding a liquid material can exhibit sufficient and uniform strength and is excellent in sealing performance at the peripheral edge.
-By setting the ratio of the basis weight of the thermoplastic resin surface material 15 to the thermoplastic resin sheet material 11 to 1 to 3, the strength can be improved and the sealing performance by the seal portion 18 can be improved. Can do.

-The volume ratio which the said hollow part 19 occupies is a moderate range which is 30 to 70%, The said effect can be exhibited, ensuring the volume of the hollow part 19 fully.
-The inclination angle θ of the inclined portion 17 is in the range of about 45 ° of 30 to 60 °, thereby suppressing the bending and tearing of the thermoplastic resin surface material 15 seen when the inclination angle θ is extreme. it can.

-By setting the width of the seal portion 18 to 2 to 20 mm, the sealing performance by the seal portion 18 can be sufficiently exhibited.
In the liquid material holding plate material 20, by accommodating a liquid material, for example, water, a heat storage agent, or the like in the hollow portion 19 of the liquid material holding thermoplastic resin hollow plate material 10, a heat insulating effect or a heat storage effect can be exhibited. .

  In the manufacturing method of the thermoplastic resin hollow plate material 10 for holding a liquid material, the step (1) of preparing the thermoplastic resin plate material 16 and the step of crushing the peripheral portion of the thermoplastic resin plate material 16 to form the inclined portion 17 ( 2), a step (3) of thermally sealing the periphery of the inclined portion 17 to form the seal portion 18, and a step (4) of cutting the entire periphery of the seal portion 18. Therefore, the thermoplastic resin hollow plate material 10 for retaining a liquid material that exhibits the above-described effects can be efficiently manufactured.

-By performing the said process (2) and a process (3) simultaneously, one process can be skipped and the manufacturing efficiency of the thermoplastic resin hollow plate material 10 for a liquid substance holding | maintenance can be improved.
-By performing the said process (2)-process (4) simultaneously, 2 processes can be skipped and the manufacturing efficiency of the thermoplastic resin hollow plate material 10 for liquid holding can be improved further.

  In the step (3), the heat fusion is performed within a temperature range of (T-50) to (T-30) ° C. and a pressure condition of 5 to 25 MPa with respect to the melting point T of the thermoplastic resin. By doing so, it is possible to set an appropriate temperature and pressure of thermal fusion for the thermoplastic resin to be used, and it is possible to ensure sufficient sealing performance by the seal portion 18.

Hereinafter, although the Example and comparative example which actualized the said embodiment are demonstrated, this invention is not limited to those Examples.
(Examples 1-3)
As the thermoplastic resin for forming the thermoplastic resin sheet 11, a polypropylene resin mixed with 10% by mass of talc was used. This thermoplastic resin is supplied to each of two melt extrusion devices, the molten resin is extruded into a sheet form from a T-die, and a molten resin sheet is placed on the peripheral surfaces of a pair of upper and lower embossing rollers that are rotatably arranged in a vacuum chamber. Vacuum adsorption was performed. Subsequently, by rotating the embossing roller, a pair of thermoplastic resin sheet-like materials 11 having protrusions 12 corresponding to the pin shape protruding from the embossing roller was obtained. Subsequently, the top portion 12 b of the protrusion 12 was heat-sealed and integrated at the tangential position of both embossed rollers, and the core material 14 was obtained.

The protrusions 12 are formed in a hollow frustum shape and arranged in a staggered manner. The diameter of the bottom 12a of the protrusion 12 was 6 mm, the diameter of the top 12b was 2 mm, and the height was 6 mm. Further, the interval between the protrusions 12 was set to 2 mm. The thickness of the thermoplastic resin sheet 11 is 0.5 mm. Next, the same polypropylene resin as the thermoplastic resin that forms the thermoplastic resin sheet 11 as the thermoplastic resin surface material 15 is extruded on both surfaces of the core material 14 into a 0.5 mm thick sheet and heat-sealed. Thus, a thermoplastic resin plate material 16 was obtained. The basis weight (g / m ² ) and the ratio of these thermoplastic resin sheet 11 and thermoplastic resin surface material 15 were set as shown in Table 1.

  Next, the step (1) of preparing the thermoplastic resin plate material 16, the step (2) of forming the inclined portion 17 by crushing the peripheral portion of the thermoplastic resin plate material 16, and the thermal bonding of the peripheral portion of the inclined portion 17 Then, the thermoplastic resin hollow plate material 10 for holding a liquid material was prepared through the step (3) of forming the seal portion 18 and the step (4) of cutting the entire periphery of the seal portion 18 at the cutting portion 24. In this case, the step (2) and the step (3) were simultaneously performed by using the metal frame 28 having the tapered surface 26 and the seal surface 27 described above. The processability at the time of obtaining this thermoplastic resin hollow plate material 10 for holding a liquid material and the sealability of the seal portion 18 were evaluated, and the results are shown in Table 1.

表１に示した結果より、実施例１〜３では、目付量の比が１．１〜２．０の範囲であったため、液状物保持用熱可塑性樹脂中空板材１０の製造工程における加工性はいずれも良好であり、得られたシール部１８のシール性も良好であった。
（実施例４〜６）
実施例４〜６では、実施例１において、前記突起体１２の頂部１２ｂの直径及び底部１２ａの直径を変化させることにより、中空部１９の容積率を表２に示すように設定した。得られた液状物保持用熱可塑性樹脂中空板材１０について、そのシール部１８のシール性を評価し、その結果を表２に示した。

From the results shown in Table 1, in Examples 1 to 3, since the ratio of the basis weight was in the range of 1.1 to 2.0, the workability in the manufacturing process of the thermoplastic resin hollow plate material 10 for holding a liquid material is All were good, and the sealing property of the obtained seal part 18 was also good.
(Examples 4 to 6)
In Examples 4 to 6, in Example 1, the volume ratio of the hollow portion 19 was set as shown in Table 2 by changing the diameter of the top portion 12 b and the diameter of the bottom portion 12 a of the protrusion 12. About the obtained thermoplastic resin hollow plate material 10 for liquid holding, the sealing performance of the seal portion 18 was evaluated, and the results are shown in Table 2.

表２に示したように、これらの実施例４〜６では、中空部１９の容積率を５１〜６５％に設定したため、中空部１９に液状物を十分に収容することができると共に、シール部１８によるシール性も良好であった。
（実施例７〜９）
傾斜部１７の傾斜角度θを実施例７では４５°、実施例８では３０°及び実施例９では６０°に設定した。また、熱融着の圧力は１０ＭＰａ、温度は１２０〜１３０℃及びシール部１８の幅は６ｍｍに設定した。得られた液状物保持用熱可塑性樹脂中空板材１０について、そのシール部１８のシール性を評価し、その結果を表３に示した。

As shown in Table 2, in these Examples 4 to 6, since the volume ratio of the hollow part 19 was set to 51 to 65%, the liquid part can be sufficiently accommodated in the hollow part 19 and the seal part. The sealing property by 18 was also good.
(Examples 7 to 9)
The inclination angle θ of the inclined portion 17 was set to 45 ° in Example 7, 30 ° in Example 8, and 60 ° in Example 9. Further, the pressure of heat fusion was set to 10 MPa, the temperature was set to 120 to 130 ° C., and the width of the seal portion 18 was set to 6 mm. About the obtained thermoplastic resin hollow plate material 10 for holding a liquid material, the sealing performance of the sealing portion 18 was evaluated, and the results are shown in Table 3.

表３に示した結果より、実施例７〜９ではいずれも液状物保持用熱可塑性樹脂中空板材１０の製造を円滑に行うことができると共に、シール部１８のシール状態はいずれも良好であった。すなわち、シール部１８は透明で、１枚のシート状になっていた。

From the results shown in Table 3, in all of Examples 7 to 9, the thermoplastic resin hollow plate material 10 for holding a liquid material can be manufactured smoothly, and the sealing state of the seal portion 18 is good. . That is, the seal portion 18 was transparent and formed into a single sheet.

It should be noted that the embodiments described above can be modified and embodied as follows.
The inclined portion 17 does not need to be set to a constant inclination angle θ over the entire peripheral edge portion of the thermoplastic resin plate material 16, and the inclination angle θ may be changed for a part thereof. Further, both end portions of the inclined portion 17 can be formed in an arc shape or a chamfered shape.

  As the two thermoplastic resin sheet-like materials 11, it is possible to use different types of materials, to make the thicknesses different, or to make the projections 12 have different shapes. .

It is also possible to configure so that a liquid material can be accommodated in the gap portion 25. In this case, the heat insulation effect, heat storage effect, etc. of the liquid material holding plate material 20 can be adjusted.
-As said liquid substance, glycols, such as ethylene glycol and propylene glycol, can also be used.

  ・ In addition to the above, the liquid material contains functional substances such as regenerators, antifreezes, hot / cold water with adjusted temperature, colorants, fungicides, antiseptics, deodorants, antifreezes, etc. The functional substance-containing water added to the water may be used according to various uses (cold storage plate material, interior plate material, etc.) as appropriate.

  -As the thermoplastic resin surface material 15, it can also comprise so that heat insulation and heat storage property may be improved using the foam of a thermoplastic resin. In addition, on the surface of the thermoplastic resin surface material 15, as necessary, various known functional layers (antifouling, antistatic, antislip, adhesion, coloring, conductivity, flame retardant, ultraviolet absorption, heat ray absorption, light A layer having a function of stability, oxidation prevention, deterioration prevention, hydrophilicity, water repellency and the like may be formed to form a laminated structure.

Next, the technical idea that can be grasped from the embodiment will be described below.
The liquid material holding according to any one of claims 1 to 5, wherein the thermoplastic resin sheet material and the thermoplastic resin surface material are composed of compatible homogeneous materials. Thermoplastic resin hollow plate material. When constituted in this way, in addition to the effects of the invention according to any one of claims 1 to 5, the bonding strength between the thermoplastic resin sheet and the thermoplastic resin surface material can be increased, The plastic resin sheet-like material and the thermoplastic resin surface material can be easily joined by thermal fusion.

  The thermoplastic resin hollow plate material for holding a liquid material according to any one of claims 1 to 5, wherein the protrusions are arranged uniformly over the entire surface of the thermoplastic resin sheet. . When configured in this manner, in addition to the effects of the invention according to any one of claims 1 to 5, the hollow portion of the thermoplastic resin hollow plate material for holding a liquid material can be formed uniformly, and the strength and Rigidity can be expressed evenly and twist can be suppressed.

  The liquid material holding plate material according to claim 6, wherein the liquid material is water or a heat storage agent. When comprised in this way, in addition to the effect of the invention which concerns on Claim 6, a liquid substance holding | maintenance board | plate material can be effectively utilized as a heat insulating material, a heat storage material, a heat insulating material, etc.

The perspective view which shows the thermoplastic resin hollow plate material for liquid substance holding | maintenance in embodiment. Sectional drawing which shows the peripheral part of the thermoplastic resin hollow plate material for liquid substance holding | maintenance. Sectional drawing which shows the center part of the thermoplastic resin hollow plate material for liquid substance holding | maintenance. (A) is a perspective view showing a thermoplastic resin sheet-like material provided with a protrusion, (b) is a sectional view of the thermoplastic resin sheet-like material having a protrusion, and (c) is a thermoplastic resin having a protrusion. The perspective view which shows a sheet-like thing upside down. (A) is a partial plan view showing a state in which a joint serving as a supply port or discharge port for a liquid material is attached to the peripheral portion of the thermoplastic resin hollow plate material for holding a liquid material, and (b) is a hose attached to the joint. The partial top view which shows a state. (A) is a partial perspective view showing a state in which another joint to be a liquid material supply port or discharge port is attached to the peripheral edge of the liquid material holding thermoplastic resin hollow plate, and (b) is a hose attached to the joint. The fragmentary perspective view which shows the state which wore. It is a figure which shows the manufacturing process of the thermoplastic resin hollow plate material for liquid holding, Comprising: (a) is sectional drawing which shows the core material which joined the pair of thermoplastic resin sheet-like material which has a protrusion, (b) is a core. Sectional drawing which shows the thermoplastic resin board | plate material which joined the thermoplastic resin surface material to both surfaces of the material, (c) is sectional drawing which shows the state which provided the inclination part in the peripheral part of the thermoplastic resin board material, (d) is an inclination part Sectional drawing which shows the state which provided the seal | sticker part in the periphery.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... The thermoplastic resin hollow plate material for liquid holding, 11 ... Thermoplastic resin sheet-like material, 12 ... Projection body, 14 ... Core material, 15 ... Thermoplastic resin surface material, 16 ... Thermoplastic resin plate material, 17 ... Inclined part , 18 ... seal part, 19 ... hollow part, 20 ... liquid substance holding plate material, θ ... inclination angle.

Claims (11)

Heat in which a thermoplastic resin surface material is bonded to both surfaces of a core material formed by fixing a pair of thermoplastic resin sheet-like materials facing each other in a pair of thermoplastic resin sheet-like objects provided with hollow frustum-shaped protrusions An inclined portion and a seal portion are sequentially formed from the center toward the peripheral direction on the entire peripheral portion of the plastic resin plate material, and have hollow portions between the thermoplastic resin sheet-like materials and in the peripheral portion. Thermoplastic resin hollow plate for holding liquids. 2. The thermoplastic resin hollow plate for holding a liquid material according to claim 1, wherein a ratio of a basis weight of the thermoplastic resin surface material to the thermoplastic resin sheet-like material is 1 to 3. 3. 3. The thermoplastic resin hollow plate for holding a liquid material according to claim 1, wherein a volume ratio occupied by the hollow portion is 30 to 70%. 4. The thermoplastic resin hollow plate material for holding a liquid material according to any one of claims 1 to 3, wherein an inclination angle of the inclined portion is 30 to 60 °. The thermoplastic resin hollow plate material for holding a liquid material according to any one of claims 1 to 4, wherein a width of the seal portion is set to 2 to 20 mm. The liquid substance holding board | plate material by which the liquid substance is accommodated in the hollow part of the thermoplastic resin hollow board | plate material for liquid substance holding | maintenance of any one of Claims 1-5. A thermoplastic resin plate material in which a thermoplastic resin surface material is bonded to both surfaces of a core material formed by fixing a pair of thermoplastic resin sheet-like materials facing each other with a pair of thermoplastic resin sheet-like materials provided with projections having a hollow frustum shape The liquid-holding thermoplastic resin hollow has a hollow portion formed between the thermoplastic resin sheet-like material and in the peripheral portion, in which an inclined portion and a seal portion are sequentially formed from the center toward the peripheral direction. A method of manufacturing a plate material,
A step (1) of preparing the thermoplastic resin plate,
A step (2) of crushing a peripheral portion of the thermoplastic resin plate material to form an inclined portion;
A step (3) of thermally sealing the periphery of the inclined portion to form a seal portion;
And a step (4) of cutting the entire periphery of the seal portion. A method for producing a thermoplastic resin hollow plate material for holding a liquid material. The method for producing a thermoplastic resin hollow plate for holding a liquid material according to claim 7, wherein the step (2) and the step (3) are performed simultaneously. The method of manufacturing a thermoplastic resin hollow plate for holding a liquid material according to claim 7, wherein the steps (2) to (4) are performed simultaneously. The method for producing a thermoplastic hollow plate material for holding a liquid material according to any one of claims 7 to 9, wherein in the step (4), the width of the seal portion is set to 2 to 20 mm. . In the step (3), the thermal fusion is performed within a temperature range of (T-50) to (T-30) ° C. and a pressure condition of 5 to 25 MPa with respect to the melting point T of the thermoplastic resin. The method for producing a thermoplastic resin hollow plate material for holding a liquid material according to any one of claims 7 to 10, wherein:

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