JP2010083484A - Roll receiving tool using styrene resin extrusion foaming board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide roll receiving tools excellent in loading resistance even though they are light in weight. <P>SOLUTION: In the roll receiving tools composed of plate-like members having openings are arranged at both sides of a roll, receive both ends of a core of the roll by the openings to support the roll in a state that the roll is suspended, and receive the load of the roll by face directions of the plate-like members, the tools are characterized in that the plate-like members are such plate-like members that one face or both faces of a styrene resin extrusion foaming board are bonded with a non-foamed synthetic resin layer. In particular, when the styrene resin extrusion foamed board and the non-foamed synthetic resin layer are bonded by heat press bonding, the roll receiving tools with excellent loading resistance can be obtained. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a roll receiver that uses a styrene resin extruded foam board to suspend and support a roll formed by winding a sheet or a film.

  Since long strips such as sheets and films are bulky, they are often handled as rolls wound around a tubular core such as paper, resin, FRP, or metal. In addition, as a method for transporting and storing such a roll, there are a method of placing the roll on a backing material laid on a pallet, and a roll holder having openings disposed on both sides of the roll, and both ends of the core of the roll. A method of receiving the portion and suspending and supporting the roll is widely adopted.

  In the latter method, since the roll is suspended in the air, a pair of roll receivers that are suspended and supported from both ends are required to have load bearing performance and seismic performance during transportation of trucks and freight cars.

  A typical roll receiver is a plate-like member having a size larger than the diameter of the roll, and an opening provided in a substantially central portion of the ○, U-shaped or flask-shaped roll load, or a pipe-like protrusion. Part. As the plate-like member, a polygon such as a rectangle, particularly a square, is often used.

  Wood materials such as wood and plywood have been used most widely as raw materials for plate-like members, and metal materials such as cast iron and aluminum are generally used for heavy rolls. In recent years, unfoamed plastics such as ABS resin, polypropylene resin, and HIPS, which have a rib structure on the back and have become lighter, have come into wide use.

  A problem common to these roll receivers is that the load resistance of the roll and the vibration resistance against vibration are required in order to support the load of the roll by hanging it in the air. In order to solve such a problem, a hard and strong material is generally selected for the plate-like member, but there is a problem that workability is deteriorated because the weight of the roll receiver itself becomes heavy. In addition, there is a problem that leads to contamination of the roll such that the woody system easily absorbs moisture, so that it can be squeezed, or the wood crust sticks as garbage. In addition, wood systems tend not to be adopted in the future from the viewpoint of protecting the natural environment. Metal systems have problems of being too heavy and rusting and contaminating the roll.

  Patent Document 1 discloses a receiver using plastic. Although this receiver is designed to reduce the weight by making the back surface of a substantially square plate-like member a rib structure, it is still heavy to handle manually and places a heavy burden on the operator. In addition, there is a problem that the neck of the protruding part of the plastic holder is susceptible to cracking due to drop impact or transportation vibration, and the number of reuses is reduced. There are problems such as being easy to accumulate and difficult to clean.

  Patent Document 2 discloses a support member using a foam for supporting a ring-shaped article such as a magnetic tape roll. Patent Document 2 discloses polypropylene foam, polyethylene foam, and polystyrene foam as foams. However, as suggested from FIG. 6 of Patent Document 2, this support member is used for an article that is light enough to be lifted by hand. Patent Document 2, page 2, upper left column, lines 8 to 11 describes a method for producing a support member using expanded polystyrene. This production method uses a production method called a bead method.

  Patent Document 3, column 1, lines 20 to 25 discloses that a polystyrene foam panel bonded to a wooden sheet is usually used as a support for a roll of 2000 pounds (about 900 kg) or more. However, in the same part of Patent Document 3, it is described that the expanded polystyrene panel itself cannot support the weight of the roll, and it is considered that the expanded polystyrene panel is merely used as a buffer material. There is no disclosure about the manufacturing method of a polystyrene foam panel.

  Patent Document 4 discloses a roll receiver using a foam that can be used for a heavy roll, and discloses that a beaded foamed polyolefin is preferable as the foam. Table 1 of Patent Document 4 also discloses a roll receiver using a beaded polystyrene foam, and this roll receiver may be inferior in deformation recovery force or the like, but has a load bearing performance that can be used for the roll receiver. It is disclosed to have. Similarly to Patent Document 4, Patent Document 5 discloses a roll receiver using beaded expanded polystyrene in Table 1.

The wooden roll receiver most often used as a roll receiver is inexpensive, but it is heavy and has thorns on its surface. For this reason, when handling a wooden roll holder by hand, it may be difficult to move, and there is a possibility of being injured by thorns. On the other hand, a roll receiver made of a resin foam is lightweight and easy to handle, and there is no possibility of injury. However, since the roll receiver made of a resin foam is a foam, the load bearing performance is inferior to that of wood.
JP-A-6-127838 Japanese Patent Laid-Open No. 1-133875 US Pat. No. 6,805,239 JP 2003-206072 A JP 2004-142808 A

  Among the resin foams, polystyrene foam is the cheapest foam. In particular, expanded polystyrene by the extrusion foaming method is the cheapest among expanded polystyrene. However, when polystyrene foam is also used for the roll holder, the load bearing performance is inferior to that of the wooden roll holder, and further improvement of the load bearing performance is desired. An object of the present invention is to provide a roll receiver using an expanded polystyrene by an inexpensive extrusion foaming method and having improved load bearing performance.

The present inventors provide a roll holder that is light in weight and has excellent load resistance by using a plate-like member provided with a non-foamed synthetic resin layer on one or both sides of a styrene-based resin extruded foam board. I found what I could do. That is, this invention is the following roll receiver and its manufacturing method.
(1) It is composed of a plate-like member having an opening, and is disposed on both sides of the roll. The two ends of the core of the roll are received by the opening to support the roll in a suspended state. A roll receiver that receives a load, wherein the plate-like member is a plate-like member in which a non-foamed synthetic resin layer is bonded to one side or both sides of a styrene resin extruded foam board.
(2) The roll receiver according to (1), wherein the plate-like member is a plate-like member in which a non-foamed synthetic resin layer is bonded to both surfaces of a styrene resin extruded foam board.
(3) The roll receiver according to (1) or (2), wherein the non-foamed synthetic resin layer and the styrene resin extruded foam board are joined by thermocompression bonding.
(4) The roll receiver according to any one of (1) to (3), wherein the non-foamed synthetic resin layer is made of a synthetic resin sheet or a synthetic resin plate.
(5) The roll receiver according to any one of (1) to (4), wherein the non-foamed synthetic resin layer has a styrene resin as a main component.
(6) The roll according to any one of (1) to (5), wherein at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer is made of a styrene resin having impact resistance. Receiving tool.
(7) The roll receiver according to any one of (1) to (6), wherein at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer is made of a styrene resin containing a rubber component. Ingredients.
(8) The roll receiver according to any one of (1) to (7), wherein at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer is made of a heat-resistant styrene resin.
(9) The roll receiver according to any one of (1) to (8), wherein at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer is made of a regenerated styrene resin.
(10) The roll receiver according to any one of (1) to (9), wherein the non-foamed synthetic resin layer is made of a styrene resin containing an inorganic filler.
(11) The roll receiver according to any one of (1) to (10), wherein a direction parallel to the extrusion direction in the extrusion foaming of the styrene-based resin foam board is a direction that supports the load of the roll.
(12) The roll receiver according to any one of (1) to (11), wherein the styrene resin foam board is a foam board stretched in the extrusion direction.
(13) The foamed board in which the styrene resin extruded foam board has air bubbles of a flat shape along the direction parallel to the surface in the foam board surface layer, and the maximum inner diameter of each air bubble is oriented in a substantially constant direction. The roll receiver according to any one of (1) to (12).

(14) The roll receiver according to any one of (1) to (13), wherein the plate-like member has a polygonal shape.

(15) The roll receiver according to any one of (1) to (14), wherein the plate-like member has a rectangular shape.
(16) The roll receiver according to any one of (1) to (15), wherein the opening is provided at substantially the center of the plate-like member.
(17) The method for manufacturing a roll receiver according to any one of (1) to (16), wherein a non-foamed synthetic resin synthetic resin sheet or synthetic resin plate is punched into an outer dimension of the roll receiver. , A step of producing a non-foamed synthetic resin material to be a non-foamed synthetic resin layer that punches the opening corresponding to the opening of the roll receiver, and punching out the styrene resin extruded foam board to the outer dimensions of the roll receiver, A step of manufacturing a styrene resin extruded foam board having an opening by punching the opening corresponding to the opening of the roll receiver, and the non-foamed synthetic resin on one or both sides of the styrene resin extruded foam board having the opening A method of manufacturing a roll receiver, comprising: joining a material.
(18) The roll receiver according to (17), wherein in the joining step, the thermocompression bonding side of the non-foamed synthetic resin material is heated and thermocompression bonded to one side or both sides of the styrene resin extruded foam board. Production method.
(19) In the step of manufacturing the non-foamed synthetic resin material, the non-foamed synthetic resin material is coated with an inner surface of an opening of the styrene resin extruded foam board and / or an outer peripheral end surface of the styrene resin extruded foam board. In the joining step, a non-foamed synthetic resin material is joined to one side or both sides of the styrene resin extruded foam board, and the coating portion is made of the styrene resin extruded foam board. The roll receiver manufacturing method according to (17) or (18), wherein the roll receiver is joined to the inner surface of the opening and / or the outer peripheral end surface of the styrene resin extruded foam board.

  The roll receiver of the present invention employs a styrene-based resin extruded foam board as a plate-like member of the roll receiver that receives both ends of the core of the roll and supports the roll in a suspended state. By providing the foamed synthetic resin layer, the styrenic resin extruded foam board has sufficient rigidity in the surface direction of the plate-like member without increasing the thickness or increasing the density. Further, since an inexpensive styrene resin extruded foam board is employed, the roll receiver is also inexpensive.

  In addition, the styrene resin extruded foam board and the non-foamed synthetic resin layer are thermocompression bonded, the main components of the styrene resin extruded foam board and the non-foamed synthetic resin layer are made of the same material, When an inorganic filler is included, or the inner surface of the opening provided in the styrene resin extruded foam board and / or the outer peripheral end surface of the styrene resin extruded foam board is covered with the non-foamed synthetic resin layer, The rigidity of the roll receiver in the in-plane direction of the member can be further improved.

  Further, by forming at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer as a recycled product, the production cost of the roll receiver can be reduced.

  Furthermore, when the non-foamed synthetic resin layer is composed of a styrene-based resin, a roll receiver is provided by using a styrene-based resin containing a rubber component in at least one of the styrene-based resin extruded foam board and the non-foamed synthetic resin layer. Can improve the impact resistance performance. Further, by using the heat-resistant styrene resin in at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer, the roll receiver can be prevented from being melted by vibration frictional heat.

  Furthermore, when the direction parallel to the extrusion direction in the extrusion foaming of the styrene resin extruded foam board is set as a direction to support the load of the roll, a foam board in which the styrene resin extruded foam board is stretched in the extrusion direction is used. In the case of using a styrene resin extruded foam board that has bubbles in a flat shape along the direction parallel to the surface in the foam board surface layer and the maximum inner diameter of each bubble is oriented in a substantially constant direction Has excellent load bearing performance.

  According to the roll receiver manufacturing method of the present invention, the synthetic resin sheet or synthetic resin plate made of non-foamed synthetic resin is punched out to the outer dimensions of the roll receiver, and the opening is made to correspond to the opening of the roll receiver. A non-foamed synthetic resin material to be a non-foamed synthetic resin layer is produced, and this is bonded to one or both sides of a styrene resin extruded foam board having an opening. Therefore, there is no need for processing such as punching to provide an opening after joining, and there is no reduction in molding accuracy due to a decrease in the thickness of the foam in the vicinity of the punched portion due to processing such as punching. Further, there is no occurrence of cracks in the non-foamed synthetic resin layer and peeling of the non-foamed synthetic resin layer and the styrene resin extruded foam board due to processing such as punching. For this reason, the load resistance of the roll receiver is not lowered.

  As shown in FIGS. 1 and 2, the roll receiver 1 of the present invention is obtained by forming an opening 3 in a plate-like member 2. As the shape of the plate-like member 2, a polygonal shape such as a square, a rectangle, or a hexagon can be suitably employed. In particular, a rectangular shape such as a square or a rectangle is preferable, but other shapes are employed. You can also. The opening 3 can be provided at an arbitrary position of the plate-like member 2, but is preferably formed at a substantially central portion of the plate-like member 2 in order to suspend and support the roll 10. A roll 10 suspended and supported by the roll receiver 1 of the present invention is obtained by winding a material to be wound 11 such as a sheet or a film around a core 12. As a method of supporting the roll 10 using the roll receiver 1 of the present invention, as shown in FIGS. 1 and 2, the roll receiver 1 is arranged on both sides of the roll 10 and the core protrudes on both sides of the roll 10. There is a method in which both end portions of 12 are fitted to the opening portions 3 of the roll receiver 1 and are suspended and supported. When the core 12 does not protrude to both sides of the roll 10, as shown in FIG. 3, a substantially cylindrical connector made of plastic or the like with the roll receiver 1 disposed on both sides of the roll 10. There is a method in which the (plug) 4 is inserted and suspended between the opening 3 and both ends of the core 12. In addition, when the core 12 is not present and is hollow, it can be suspended using a rod (not shown) such as a pipe penetrating the hollow portion or the connector 4.

  FIG. 4 is an example of the shape of the opening 3 provided in the plate-like member 2 that is preferably employed in the present invention, and a ○ -shaped (round) opening 3A as shown in FIG. A U-shaped opening 3B as shown in FIG. 4B, a flask-shaped opening 3C as shown in FIG. When the lower end of the opening 3 that receives the load of the roll 10 is an arc, the diameter of the circle is preferably 60 to 200 mm.

  A plate-like member 2 constituting the roll receiver 1 of the present invention is formed by joining a non-foamed synthetic resin layer 6 on one side or both sides of a styrene-based resin extruded foam board 5 in a laminated manner, and the plane direction of the plate-like member 2 And receiving the load of the roll 10. It is preferable to provide the non-foamed synthetic resin layer 6 on both surfaces. When providing only on one side, it is preferable to arrange the roll receiver 1 on both sides of the roll 10 so that the non-foamed synthetic resin layer 6 is arranged on the roll 10 side. In other words, when the styrene resin extruded foam board 5 is arranged on the roll 10 side, when the roll is supported using the connecting tool, a large stress acts on the styrene resin extruded foam board 5 portion to deform the foam. Therefore, in order to prevent this, it is preferable to arrange the roll receiver 1 on both sides of the roll 10 so that the non-foamed synthetic resin 6 is arranged on the roll 10 side.

  In the present invention, the non-foamed synthetic resin layer 6 is made of, for example, a synthetic resin sheet or a synthetic resin plate. There is no particular limitation on the material, and it is sufficient if it has rigidity. For example, since the bonding property with the styrene resin extruded foam board 5 is excellent, a styrene resin can be preferably used. The thickness of the non-foamed synthetic resin layer 6 cannot be generally defined, but is preferably 0.5 to 5.0 mm. Thus, the thickness of the non-foamed synthetic resin layer 6 is preferably smaller than the thickness of the styrene resin extruded foam board 5.

  The roll receiver of the present invention can support a larger load by using a laminate of the styrene resin extruded foam board 5 and the non-foamed synthetic resin layer 6 in the case of the foam alone or the non-foamed synthetic resin layer alone. And its weight is small.

  For example, as will be described in Examples, the roll receiver of the present invention has excellent load resistance compared to a roll receiver made of only a foam having the same weight and the same vertical and horizontal dimensions. Further, the roll receiver of the present invention has excellent load resistance even when compared with a roll receiver made of only a non-foamed body having the same weight and the same vertical and horizontal dimensions. The reason why the roll receiver of the present invention has an excellent load resistance is considered as follows.

  When a plate-like member receives a compressive force from above and below, it bends and breaks (buckling). A material with a large elastic modulus is difficult to buckle. However, even if the material has a large elastic modulus, a thin plate bends easily when it receives a compressive force from above and below, and cannot support a heavy load. For example, a plate made of polystyrene and having a length × width × thickness of 350 mm × 350 mm × 1 mm is easily bent when subjected to a compressive force from above and below. If the plate does not bend, it can withstand a load of 2142 kg. In this calculation, it is assumed that the compression elastic modulus of polystyrene is 3.0 GPa, the load is evenly added to the area of 350 mm × 1 mm, and the strain (decrease in length) is elastically deformed up to 2% to support the load. . If the strain (decrease in length) exceeds 2%, it will not be elastically deformed and plastically deformed and cannot support the load.

  Foam is a material with low mechanical strength. However, when the thickness is increased, when a compressive force is applied from above and below, the side surface is not often curved even if it contracts.

  Therefore, if a non-foamed synthetic resin plate with a large elastic modulus is integrated into the foam so as to have sufficient bonding strength and a load is applied in a direction parallel to the surface of the plate-like member, the non-foamed synthetic resin plate will not bend, A load according to the elastic modulus can be supported. The material in which the foam and the non-foamed synthetic resin plate having a large elastic modulus are integrated in this way is a load larger than the load that can be supported by the foam alone or the non-foamed synthetic resin plate alone, or even larger than the total of these. Can support the load.

  Thus, it can be said that the material in which the foam and the non-foamed synthetic resin plate having a large elastic modulus are integrated is a material that is very suitable for a roll receiver that is required to be lightweight and load-bearing.

  The non-foamed synthetic resin layer 6 is preferably a styrene resin. In manufacturing the roll receiver 1 of the present invention, a lot of loss occurs due to cutting of the non-foamed synthetic resin layer 6 and cutting or punching of the opening 3. If the styrene resin extruded foam board 5 is molded from a plate-like extruded foam into the shape of the styrene resin extruded foam board 5, a similar loss may occur, and a large amount of waste may be generated. Therefore, it is preferable to recycle the loss generated in the manufacturing process as at least one material of the styrene resin extruded foam board 5 and the non-foamed synthetic resin layer 6 used in the present invention. However, sufficient performance is exhibited as the plate-like member 2 of the roll receiver 1 of the present invention. Furthermore, when producing the synthetic resin sheet or synthetic resin plate constituting the non-foamed synthetic resin layer 6, inorganic fillers such as carbon black, talc, mica, calcium carbonate, glass fiber and other inorganic powders or fibrous materials Is added, the hardness is increased and the roll load resistance is remarkably improved.

  In the present invention, the fact that the styrene resin extruded foam board 5 and the non-foamed synthetic resin layer 6 are composed mainly of the same material is heated when the styrene resin extruded foam board 5 and the non-foamed synthetic resin layer 6 are joined. This is preferable because it is easy to crimp. Here, having the same material as the main component includes that both are the same material.

  In general, a synthetic resin may be composed of a single resin type, but often includes various resin types, and the resin component includes copolymerization, composite polymer, polymer blend, etc. In many cases, it contains auxiliary materials such as plasticizers, stabilizers, lubricants, colorants, antistatic agents, etc., and various inorganic fillers are used to increase the amount, increase the hardness, reinforce, color, and impart conductivity. The same material referred to in the present invention means that the non-foamed synthetic resin layer 6 and the styrene resin extruded foam board 5 contain the same resin species in common. Specifically, when the non-foamed synthetic resin layer 6 is also a styrenic resin, it contains the same resin species. In this case, the roll receiver can be manufactured at low cost.

  In the present invention, the method for joining the styrene resin extruded foam board 5 and the non-foamed synthetic resin layer 6 is not particularly limited as long as an appropriate joining strength can be obtained. Applicable. In order to obtain the maximum load resistance as the roll receiver 1, joining by thermocompression bonding is most preferable. According to thermocompression bonding, the buckling of the plate-like member 2 hardly occurs when the roll load is concentrated on the opening 3 of the roll receiver 1.

  In particular, a plate-like member formed by joining a synthetic resin sheet formed by punching an opening to one or both sides of a styrene resin extruded foam board 5 having an opening 3 is a styrenic resin having no opening. Compared with the plate-like member 2 formed by bonding a synthetic resin sheet to one or both sides of the resin extruded foam board 5 to form a non-foamed synthetic resin 6 and then punching and forming the opening 3 with a Thomson blade or the like. It is preferable because the load performance does not tend to decrease.

  As a specific manufacturing method of the roll receiver 1, as shown in FIG. 5A, a synthetic resin sheet is punched into an outer dimension and an opening dimension corresponding to the non-foamed synthetic resin layer 6, thereby producing a non-foamed synthetic sheet. Resin material 6A is manufactured. On the other hand, as shown in FIG. 5B, the styrene resin extruded foam board 5 is manufactured by punching the styrene resin extruded foam board into an outer dimension and an opening size corresponding to the styrene resin extruded foam board 5. Then, as shown in FIG. 5 (c), after heating the thermocompression bonding surface side of the non-foamed synthetic resin material 6A with a heating means 15 such as a heater, as shown in FIG. In addition to positioning and setting in the upper and lower molds 16, the styrene resin extruded foam board 5 is set in the mold 16 between the upper and lower non-foamed synthetic resin materials 6 A, and the non-foamed synthetic resin material 6 A in the mold 16. Is pressure-bonded to the styrene resin extruded foam board 5 (joining step), and the roll receiver 1 of the present invention is produced as shown in FIG. When manufactured in this way, the roll receiver 1 can be manufactured with high accuracy and the load bearing performance can be improved. Moreover, since the non-foamed synthetic resin material 6A and the styrene-based resin extruded foam board 5 are joined by thermocompression bonding, the load resistance is improved as compared with the case of joining with an adhesive. However, a plurality of roll receivers 1 can be manufactured at the same time by setting a plurality of styrene-based resin extruded foam boards 5 and a plurality of non-foamed synthetic resin materials 6A in a mold and thermocompression bonding. It is.

  Next, the preferable aspect at the time of producing the roll holder 1 of this invention using a styrene resin as the styrene resin extrusion foaming board 5 and the non-foaming synthetic resin layer 6 is described below.

  When the load of the roll 10 is 100 to 250 kg, when the shape of the plate-like member 2 is a rectangle, the size is preferably 300 mm or more and 400 mm or less, more preferably 350 mm square. If it is less than 300 mm, the roll 10 may protrude, and if it exceeds 400 mm, the air space around the roll 10 increases and the transportation space may be limited. The thickness of the non-foamed synthetic resin layer 6 is preferably 0.3 mm or more and 2.0 mm or less. Moreover, it is preferable that the thickness of the styrene resin foam 5 is 6 mm or more and 25 mm or less, More preferably, it is about 20 mm. If it is less than 6 mm, it tends to cause buckling, and if it exceeds 25 mm, it may not be economical. It is preferable that the density of the styrene resin foam board 5 is 0.2 to 0.02 g / ml. When the non-foamed synthetic resin layer 6 is thin, a high-density styrene resin extruded foam board 5 may be used. When the non-foamed synthetic resin layer 6 is thick, a low-density styrene resin extruded foam board 5 is combined. Just do it. When deviating from these ranges, the load resistance tends to be either insufficient or excessive. Moreover, the opening 3 provided in the rectangular plate-like member 2 is any one of a circle shape, a U shape, and a flask shape, and the diameter of the semicircle that receives the load of the roll 10 is 60 to 100 mm or 130. It is preferable that it is -200mm. The circle or semicircular portion that receives the load of the roll is preferably near the center of the plate-like member.

  When the load of the roll 10 is 250 to 500 kg, the size of the rectangular plate-like member 2 is preferably 500 mm or more and 600 mm or less in length and width, more preferably 550 mm square. If it is less than 500 mm, the roll 10 may protrude, and if it exceeds 600 mm, the air space around the roll 10 increases and the transportation space may be limited. The thickness of the non-foamed synthetic resin layer 6 is preferably 0.5 mm or greater and 4.0 mm or less. Moreover, it is preferable that the thickness of the styrene resin foam board 5 is 20 mm or more and 50 mm or less, More preferably, it is about 30 mm. If it is less than 20 mm, it tends to cause buckling, and if it exceeds 50 mm, it may not be economical. It is preferable that the density of the styrene resin foam board 5 is 0.2 to 0.02 g / ml. When the non-foamed synthetic resin layer 6 is thin, a high-density styrene resin extruded foam board 5 may be used. When the non-foamed synthetic resin layer 6 is thick, a low-density styrene resin extruded foam board 5 is combined. Just do it. When deviating from these ranges, the load resistance tends to be either insufficient or excessive. The opening 3 provided in the rectangular plate-shaped member is one of a ◯ shape, a U shape, and a flask shape, and the diameter of the semicircle that receives the load of the roll is 60 to 100 mm, or 130 to 200 mm. It is preferable that The circle or semicircular portion that receives the load of the roll is preferably near the center of the plate-like member.

  When the load of the roll 10 is 500 to 1000 kg, the size of the rectangular plate-like member 2 is preferably 700 mm or more and 1000 mm or less, more preferably 770 mm square. If it is less than 700 mm, the roll 10 may protrude, and if it exceeds 1000 mm, the air space around the roll 10 increases and the transportation space may be limited. The thickness of the non-foamed synthetic resin layer 6 is preferably 1.0 mm or greater and 5.0 mm or less. Moreover, it is preferable that the thickness of the styrene resin foam board 5 is 20 mm or more and 60 mm or less, More preferably, it is about 40 mm. If it is less than 20 mm, it tends to cause buckling, and if it exceeds 60 mm, it may not be economical. It is preferable that the density of the styrene resin foam board 5 is 0.2 to 0.02 g / ml. When the non-foamed synthetic resin layer 6 is thin, a high-density styrene resin extruded foam board 5 may be used. When the non-foamed synthetic resin layer 6 is thick, a low-density styrene resin extruded foam board 5 is combined. Just do it. When deviating from these ranges, the load resistance tends to be either insufficient or excessive. The opening 3 provided in the rectangular plate-shaped member is any one of a ○ shape, a U shape, and a flask shape, and the diameter of the semicircle that receives the load of the roll 10 is 60 to 100 mm, or 130 to It is preferable that it is 200 mm. The circle or semicircular portion that receives the load of the roll is preferably near the center of the plate-like member.

  Moreover, although the opening part 3 provided in the plate-shaped member 2 of the roll receiver 1 of this invention mentioned above and the end surface of the outer periphery four sides are in the state which the styrene-type resin extrusion foam board 5 exposed outside, this part Is covered with a non-foamed synthetic resin layer such as a synthetic resin sheet in the same manner as the other portions, the load resistance in the opening 3 is improved, the durability is increased, the number of reuses is increased, and the appearance is improved. As the method, as shown in FIG. 6A, as a non-foamed synthetic resin material 6B made of a synthetic resin sheet, a main body portion 6a capable of covering one side of a styrene resin extruded foam board 5 and a synthetic resin foam 5 has a covering portion 6b that can cover the opening 3 and a covering portion 6c that can cover the end faces of the outer peripheral four sides of the synthetic resin foam 5, and the cut portions 7 and the folds 8 are put in the covering portions 6b and 6c in advance. The non-foamed synthetic resin material 6B is manufactured, and then, as shown in FIG. 6B, the thermocompression bonding side of the non-foamed synthetic resin material 6B is heated by the heating means, and the non-foamed synthetic resin material 6B is covered. In a state where the parts 6b and 6c are bent along the crease 8, this is set together with the styrenic resin extruded foam board 5 in the die 16 of the press machine, and the non-foamed synthetic resin material 6B is placed in the styrenic in the die 16. Add to resin extrusion foam board 5 By crimping, as shown in FIG. 6 (c), the coating unit 6b, roll receptacle 1A which is an end face coated with the 6c obtained. Only the opening 3 may be used for the end face covering process.

  Further, when the roll receiver 1 is manufactured using a styrene resin, in order to improve the impact resistance performance of the roll receiver 1, at least one of the styrene resin extruded foam board 5 and / or the non-foamed synthetic resin layer 6 is used. On the other hand, in the production process, it is also a preferred embodiment to add a rubber component or an inorganic filler. As the rubber component, a styrene-butadiene block copolymer, a styrene-isoprene block copolymer, a styrene-ethylene / butylene block copolymer, and the like can be employed. Further, as the inorganic filler, an inorganic filler such as carbon black, talc, mica, calcium carbonate, glass fiber or the like or a fibrous material can be added.

  Methods for producing a styrene resin foam can be broadly classified into a bead method and an extrusion foam method. The bead method is also called an in-mold molding method. First, styrene resin pre-expanded particles are produced, filled in a mold that can be closed but cannot be sealed, heated with high-pressure steam, etc. This is a method for producing a foamed molded article having a shape corresponding to a mold while foaming and fusing the foamed particles together. According to the bead method, since a molded body having a shape corresponding to a mold can be obtained, there is an advantage that a molded body having a complicated shape can be manufactured at once. However, the molded product is expensive due to many processes. The styrenic resin foam by the bead method is a flat-shaped bubble and does not have a bubble oriented in a fixed orientation.

  In the extrusion foaming method, a foaming agent such as a hydrocarbon gas is added to a molten styrene resin under high pressure to produce a mixture of the resin and the foaming agent. As shown in FIG. This is a method for producing a foam by extruding downward and forming it into a desired cross-sectional shape with a molding die 22 or a molding roll 23. According to the extrusion foaming method, only a foam having a simple shape such as a plate-like body or a cylindrical body can be produced, but there is an advantage that an inexpensive foam can be obtained with fewer steps.

  According to the bead method, a roll receiver made of a foam having an opening can be manufactured all at once. As already mentioned, roll holders generally have a simple structure, and roll holders made of foam cut plate-like members of the required dimensions from boards manufactured by extrusion foaming to form openings. It can be easily manufactured just by doing.

  Examples of the styrene-based resin that is a raw material resin of the foam board by the extrusion foaming method used in the roll receiver of the present invention include styrene, methylstyrene, ethylstyrene, isopropylstyrene, dimethylstyrene, bromostyrene, chlorostyrene, vinyltoluene, and vinylxylene. Such as a homopolymer of a styrene monomer or a copolymer of a combination of two or more monomers, the styrene monomer and divinylbenzene, butadiene, acrylic acid, methacrylic acid, methyl acrylate, Examples thereof include a copolymer obtained by copolymerizing one or more monomers such as methyl methacrylate, acrylonitrile, maleic anhydride, and itaconic anhydride. Monomers such as acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, maleic anhydride, and itaconic anhydride that are copolymerized with styrenic monomers lower the physical properties of the styrene resin extruded foam board produced. An amount not to allow it to be used can be used. Further, the styrene resin used in the present invention is not limited to the homopolymer or copolymer of the styrene monomer, and the homopolymer or copolymer of the styrene monomer and the other single monomer. It may be a blend of a monomer with a homopolymer or copolymer, and a diene rubber reinforced polystyrene or an acrylic rubber reinforced polystyrene can also be blended. A modified styrene resin obtained by polymerizing a styrene monomer in the presence of a resin such as polyethylene can also be used. In the present invention, among these styrene resins, a polystyrene resin can be particularly preferably used.

  As the styrenic resin, a resin having a melt flow rate (hereinafter referred to as “MFR”) in the range of 0.1 to 50 g / 10 min is preferably used. By using a styrenic resin having an MFR in the above range, the discharge amount of the styrenic resin composition at the time of extrusion foaming, the thickness, width, density, closed cell ratio of the obtained styrenic resin extruded foam board, Alternatively, there is an advantage that the surface property can be easily adjusted. In addition, by using a styrene resin with an MFR in the above range, the appearance of the styrene resin extruded foam board is excellent, and the balance of properties such as mechanical strength and toughness expressed by compressive strength, bending strength, and bending deflection is achieved. Becomes better. Further, the MFR of the styrene-based resin is more preferably 0.3 to 30 g / 10 minutes, particularly 0.5 to 20 g / 10 minutes, from the viewpoint of the balance of moldability, mechanical strength of the extruded foam board, toughness and the like. preferable. In addition, MFR is measured by A method of JISK7210 (1999), and test conditions are set according to a composition of a styrene resin. For example, for polystyrene, it is measured under test condition H.

  Styrenic resins include silica, talc, calcium silicate, wollastonite, kaolin, clay, mica, zinc oxide, titanium oxide, calcium carbonate and other cell nucleating agents, sodium stearate, magnesium stearate, barium stearate , Processing aids such as liquid paraffin, olefin waxes, stearylamide compounds, flame retardants such as hexabromocyclododecane, flame retardant aids, phenolic antioxidants, phosphorus stabilizers, nitrogen stabilizers, sulfur Additives such as stabilizers, light-resistant stabilizers such as benzotriazoles and hindered amines, antistatic agents, colorants such as pigments, and water-absorbing substances may be contained.

  Of these, the amount of the cell nucleating agent used is preferably 0.5 parts by weight or less, more preferably 0.3 parts by weight or less, based on 100 parts by weight of the styrene resin. When the amount of the cell nucleating agent is increased more than necessary, the foam tends to be slightly brittle. If the amount of the cell nucleating agent is too small, a good cell structure tends not to be obtained. Therefore, the amount of the cell nucleating agent is preferably 0.05 parts by weight or more.

  The styrene resin foam board used in the present invention can be produced by a normal extrusion foaming technique. That is, a styrenic resin is heated and melted in an extruder or the like, and a foaming agent is injected into the styrenic resin under a high pressure condition to form a fluidized gel, cooled to a temperature suitable for extrusion foaming, and the fluidized gel is cooled through a die. It is possible to manufacture by extruding and foaming in the region of the above to form a styrene resin extruded foam board. The pressure when injecting the foaming agent is not particularly limited, and may be any pressure that is higher than the internal pressure of the extruder in order to inject it into the extruder.

  There are no particular limitations on the heating temperature, melting time, and melting means when the styrene resin is heated and melted. The heating temperature may be not less than the temperature at which the styrene resin melts, and usually about 150 to 250 ° C. The melting time varies depending on the amount of extrusion per unit time, the melting means, and the like, and thus cannot be determined unconditionally. However, the time required for uniformly dispersing and mixing the styrenic resin and the foaming agent is selected. In addition, the melting means is not particularly limited as long as it is used in normal extrusion foaming such as a screw type extruder. The temperature at the time of extrusion foaming from the die cannot be generally described because it is determined by various factors such as the type of resin, the type and amount of the foaming agent, the desired expansion ratio, etc. What is necessary is just to adjust suitably so that a physical property may be reached. When it is required to reduce the pressure fluctuation during extrusion or to increase the dispersibility of the foaming agent and increase the stability, a method for controlling the conditions such as increasing the pressure in the extruder, or the extruder, for example, A cooling and mixing apparatus as disclosed in Japanese Patent No. 5393, or a method of adding or connecting large-capacity items in a mixing apparatus capable of cooling having the same function, or a publicly known method generally called a static mixer or cavity transfer mixer It is possible to adopt a method of connecting the kneading apparatuses.

  The foaming agent used for extrusion foaming is preferably a non-halogen material from the viewpoint of environmental compatibility. Specifically, (ii) one or more saturated hydrocarbons selected from saturated hydrocarbons having 3 to 5 carbon atoms, and (b) compounds selected from dimethyl ether, diethyl ether and methyl ethyl ether, C) It is preferable to use a mixture with other non-halogen foaming agents. When the foaming agents (b), (b) and (c) above are used in combination, the thickness, width, density, closed cell rate, thermal conductivity, cell diameter, surface of the resulting extruded foam board are obtained. It becomes easy to adjust the property to a desired value.

  Examples of the saturated hydrocarbon having 3 to 5 carbon atoms include propane, n-butane, i-butane, n-pentane, i-pentane, neopentane, and cyclopentane. Among these, at least one selected from the group consisting of propane, n-butane and i-butane is preferable because of good foamability. n-butane and / or i-butane are more preferred, and i-butane is particularly preferred.

  The saturated hydrocarbon having 3 to 5 carbon atoms is preferably 20 to 100 parts by weight, more preferably 30 to 80 parts by weight, particularly preferably 40 to 60 parts by weight with respect to 100 parts by weight of the total amount of the blowing agent. is there. By setting the content of the saturated hydrocarbon in the above range, the styrene resin is appropriately plasticized, the styrene resin and the foaming agent are uniformly kneaded in the extruder, and the pressure control of the extruder becomes easy.

  The compound selected from dimethyl ether, diethyl ether and methyl ethyl ether is preferably 0 to 80 parts by weight, more preferably 20 to 70 parts by weight, particularly preferably 40 to 60 parts by weight based on 100 parts by weight of the total amount of the blowing agent. Parts by weight. By using an ether compound and setting its content within the above range, an extruded foam board having excellent moldability can be obtained.

  Examples of other non-halogen blowing agents include those selected from the group consisting of water, carbon dioxide, and alcohol. By using these as a blowing agent, the amount of a compound selected from (i) a saturated hydrocarbon having 3 to 5 carbon atoms and (b) dimethyl ether, diethyl ether, and methyl ethyl ether can be reduced.

  As other non-halogen blowing agents, water is preferably 0 to 80 parts by weight, more preferably 3 to 70 parts by weight, particularly preferably 3 to 30 parts by weight, based on 100 parts by weight of the total amount of the blowing agent. Most preferably, it is 5 to 20 parts by weight.

  The density of the foam board used in the roll receiver of the present invention varies depending on the load bearing performance required and cannot be specified unconditionally, but is preferably 20 to 200 g / L, more preferably 25 to 100 g / L, and more preferably 30 to 60 g / L. Is particularly preferred. As the density increases, the load bearing performance improves, but the weight of the support increases. The density can be calculated from the weight of the foam and the volume by the submersion method.

  In the extrusion foaming method, as shown in FIG. 9, a desired cross-sectional shape is formed by a molding die 22 or a molding roll 23. Foam boards produced by the extrusion foaming method tend to be stretched in the extrusion direction. In particular, this tendency is large in a foam board having a small thickness, specifically, a foam board having a thickness of 5 to 100 mm, further 20 to 60 mm, particularly 25 to 40 mm. Such a foam board has a flat structure in which bubbles, particularly bubbles near the surface, are long in the extrusion direction. An extruded foam board stretched in the extrusion direction has a high mechanical strength in a direction parallel to the extrusion direction (hereinafter simply referred to as the extrusion direction). Therefore, in the roll receiver of the present invention, it is preferable that the direction parallel to the extrusion direction in the extrusion foaming of the styrene resin foam board is a direction that supports the load of the roll.

  Specifically, a styrene-based resin extruded foam board having a flatness in the extrusion direction of bubbles near the foam board surface of 1.1 to 20, preferably 1.2 to 10 is preferable. Styrenic resin extrusion in which the flatness in the extrusion direction of the bubbles near the surface is in the above range, and the flatness in the extrusion direction of the bubbles near the center of the foam board is 1.1 to 20, preferably 1.2 to 10. More preferred is a foam board. The flatness of the bubble in the extrusion direction is measured as follows.

  A predetermined range of the cross section along the extrusion direction of the styrene resin extruded foam board is sampled. The cross section along the extrusion direction is a cross section extending in the thickness direction in the extrusion direction of the styrene resin extruded foam board. In the case of bubbles near the surface of the foam board, the predetermined range is near the center of the portion from the surface perpendicular to the thickness direction of the styrene resin extruded foam board to 2 mm in the thickness direction. In the case of bubbles near the center of the foam board, it is near the center of the styrene resin extruded foam board. When a predetermined number of bubbles to be described later cannot be obtained with one sample, a plurality of locations may be sampled.

  Each sampled sample is photographed using a scanning electron microscope (SEM) to obtain an SEM image. The photographing magnification of the SEM image is set to about 40 times. The imaging range is, for example, about several mm to several cm in length × width. Each SEM image is processed using an image processing apparatus (for example, product name: PIAS-II, manufactured by Pierce Co., Ltd.) with the thickness direction as the vertical direction and the extrusion direction as the horizontal direction. The bubble area (hereinafter referred to as “bubble area”) (a) is obtained. Further, the maximum diameter (Feret diameter) in the longitudinal direction (thickness direction: zf) and lateral direction (extrusion direction: xf) of the bubbles is determined. Note that the measurement of the bubble area and the maximum diameter is for only the bubble in which the entire view of the bubble is projected in the SEM image, and a part of the bubble is missing at the edge of the SEM image or the edge of the SEM image. Even if it is not a part, a part of the bubble wall is missing, or a bubble integrated with an adjacent bubble or the like is excluded. The number of bubbles to be measured is preferably at least 100. Therefore, in some cases, 100 or more bubbles can be measured with one SEM image, but in other cases, two or more SEM images may be used.

Each bubble in the SEM image is assumed to be elliptical, and the bubble diameter X in the extrusion direction and the bubble diameter Z in the thickness direction of each bubble are obtained according to the following formulas (1) and (2).
X = [{(4 × a) / (π × xf × zf)} 1/2] × xf: (1)
Z = [{(4 × a) / (π × xf × zf)} 1/2] × zf: (2)
Then determine the average cell diameter X _av extrusion direction and the number average each cell diameter X of the extrusion direction to obtain an average cell diameter in the thickness direction and the number average each cell diameter Z _av in the thickness direction. The flatness of the bubble in the extrusion direction is determined as _Xav / _Zav . Similarly, the flatness in the width direction can be obtained. The flatness in the width direction is preferably smaller than the average bubble flatness in the extrusion direction.

  As indicated above, flatness is measured for virtually all bubbles. Desirably, the flatness measured for substantially all bubbles is in the above range. However, large bubbles tend to be flat compared to small bubbles. Even if it is a styrene resin extruded foam board having a flatness ratio of 1.1 to 20, preferably 1.2 to 10, measured only for large bubbles having a bubble diameter X in the extrusion direction of 200 μm or more in the measurement method described above. It can be used for the roll receiver of the present invention.

  As a method of controlling the flatness ratio in the extrusion direction of the bubbles, for example, a method of adjusting the thickness expansion rate when the molten resin is foamed into the atmosphere at the time of extrusion foaming, that is, the slit thickness and the molding die for rectangularization A method for adjusting the height is mentioned. Further, as a preferable method, the die lip temperature is adjusted to a temperature lower by 10 to 60 ° C. than the resin temperature discharged from the extruder, and after the styrene-based resin extruded foam board is extruded and foamed, the linear velocity at the time of extrusion foaming is adjusted. On the other hand, there is a method of further stretching at a linear speed of 1.01 to 1.20 times to form a plate shape. Moreover, the method of extending | stretching while heating an extrusion foam is mention | raise | lifted. Specifically, the heated extruded foam is heated by rotating the roll faster than the rotation speed of the take-up machine using a heating and stretching apparatus that performs stretching treatment with a roll while heating the extruded foam with heated air. Stretching is performed. Thereby, the extruded foam is stretched in the extrusion direction, and the bubble flatness in the extrusion direction is increased. When the extrusion foaming method is used as described above, a foam board having a large cell flatness in the extrusion direction and a high mechanical strength in the direction can be easily obtained.

  In the extrusion foaming method, the surface of the foam in contact with the molding die or the molding die has a skin layer having a specific gravity greater than that inside the molded body. In the present invention, it is desirable that the foam board having the surface skin layer obtained by the extrusion foaming method is used as it is as a plate-shaped member of the roll receiver without removing the surface skin layer. Foam boards with a rectangular cross-section by extrusion foaming have surface skin layers on the top and bottom surfaces and side surfaces in the extrusion direction, but the final product usually has no skin layers on the top and bottom surfaces. . The foam board by the extrusion foaming method is mostly used as a building material, but it is often necessary to adhere to concrete or the like, in order to remove a skin-like surface layer that is inferior in adhesion to concrete or the like. Another reason is that a plurality of foam boards may be manufactured from a thick foam board by slicing or the like. When the foam board by the extrusion foaming method is used for the roll receiver, it is not desirable to use the foam board from which the surface is removed. Therefore, it is preferable to use the foam board produced at the time of extrusion foaming as it is as a plate-like member of the roll receiver, leaving the skin-like surface layer as it is.

  The thickness of the foam board used in the roll receiver of the present invention varies depending on the required load resistance and the density of the foam and cannot be defined unconditionally, but is preferably 5 to 100 mm, more preferably 20 to 60 mm, particularly 25 to 25 mm. 40 mm is preferable. It is preferable to use an extruded foam board manufactured with a thickness of 20 to 60 mm and a density of 25 to 100 g / L as a plate member of a roll receiver while having a surface skin layer. More preferably, an extruded foam board manufactured with a thickness of 25 to 40 mm and a density of 30 to 60 g / L is used as a plate-like member of a roll receiver while having a surface skin layer.

  Bubbles having various bubble diameters are usually present in the foam board produced by the extrusion foaming method. In the foam board used for the roll receiver of the present invention, the average cell diameter is preferably 10 to 1000 μm, and more preferably 100 to 600 μm. The average bubble diameter is determined as follows. The longitudinal section along the extrusion direction of the extruded foam and the transverse section perpendicular to the extrusion direction were magnified 30 times with a scanning electron microscope (manufactured by Hitachi, Ltd., product number: S-450), and photographed. Copy the photograph taken with a dry copier. For the copied image, 3 to 5 lines are drawn in each of the extrusion direction, the thickness direction, and the width direction of the foam, and the line length is divided by the number of cells included in each line to thereby obtain the respective directions. The average cell diameter is obtained (the average cell diameter in the extrusion direction and thickness direction of the foam is obtained from the copy of the longitudinal section, and the average cell diameter in the width direction of the foam is obtained from the copy of the transverse section). Each line is drawn except for partially missing cells located at the edge of the image. Regarding the average cell diameter in each direction, the average cell diameter in the extrusion direction is X, the average cell diameter in the width direction is Y, the average cell diameter in the thickness direction is Z, and the cube root of the product of X, Y, and Z is Calculate the average cell diameter of the foam.

  The bubble diameter distribution pattern in the foam board may be a pattern having a single peak or a pattern having a plurality of peaks as described in JP-A-2007-308627. The bubble diameter distribution pattern can be obtained by the method described in JP-A-2007-308627.

  The closed cell ratio in the foam board is preferably 70% or more, and more preferably 80% or more. The closed cell ratio is calculated according to ASTM D-2856 using a multi-pynometer (manufactured by Yuasa Ionics Co., Ltd.).

Hereinafter, the present invention will be described by way of examples. In addition, the measuring method of load bearing performance is as follows.

(Load bearing performance)
A roll holder having a circular opening having a length × width of 350 mm × 350 mm and a diameter of 152 mm (6 inches) in the center is prepared. Cut through a plane perpendicular to the length direction or width direction through the center of the roll holder to create two cut pieces having a semicircular cutout. One cut piece is placed on a horizontal plane so that the semicircular cutout is on the upper side. A metal member having the same shape as the semicircular cutout is disposed in the semicircular cutout. A load was applied to the metal member at a speed of 10 mm / min downward using an autograph, and the relationship between the load and the descending length of the metal member was determined. Since the strain (%) defined by the following formula is elastically deformed up to 2%, the load at the time of 2% strain is defined as the load bearing performance.
Distortion (%) =
(Descent length of the metal member) / (Length from the lower end of the semicircular notch to the lower part of the roll holder) × 100
Example 1
Kanelite Foam Super E-BK manufactured by Kaneka Co., Ltd., which is a foam board produced by extrusion foaming, was used as the styrene resin foam board used for the roll holder. This foam board had a thickness of 35 mm and a density of about 40 g / L. Moreover, this foam board is manufactured by extending in the extrusion direction. A plate-like member having a length × width of 350 mm × 350 mm was cut out from the foam board, and a circular opening having a diameter of 152 mm was provided at the center. The foam board had a skin layer on the surface, and most of the bubbles near the surface were flat bubbles that were long in the extrusion direction. FIG. 7 shows an optical micrograph near the surface of the foam board. In this photograph, the horizontal direction is the extrusion direction in extrusion foaming.

  Separately, two high-impact polystyrene sheets having a length × width × thickness of 350 mm × 350 mm × 1 mm and a circular opening having a diameter of 152 mm in the center were prepared. A high impact polystyrene sheet was placed on both sides of the foam plate member, and the foam plate member and the high impact polystyrene sheet were thermally fused using a hot press to create a roll receiver. Thermal fusion was performed at a temperature of 130 to 135 ° C. and a heating time of 1 minute. When the high impact polystyrene sheet of the created roll receiver was peeled off, the foam part was broken and it was confirmed that the fusion was sufficiently advanced. This roll receiver was cut along a plane perpendicular to the extrusion direction during extrusion foaming of the foam through the center of the opening, and an evaluation sample was prepared to determine load bearing performance. The load bearing performance was 750 kg.

(Example 2)
Example 1 except that Kanelite Foam Super E-BK manufactured by Kaneka Co., Ltd., which is a foamed board by the extrusion foaming method, is used instead of Kanelite Foam Super E-BK as the styrene resin foam board used for the roll receiver. A roll receiver was prepared in the same manner as described above, and an evaluation sample was prepared. The load bearing performance was 1154 kg. Kanelite Foam Super-X had a thickness of 35 mm and a density of about 40 g / L. Moreover, this foam board is manufactured by extending in the extrusion direction further than Kanelite Foam Super E-BK. This foam board also had a skin layer on the surface, and most of the bubbles in the vicinity of the surface were flat bubbles longer in the extrusion direction than Kanelite Foam Super E-BK. FIG. 8 shows an optical micrograph near the surface of the foam board. In this photograph, the horizontal direction is the extrusion direction in extrusion foaming. Kanelite Foam Super E-BK and Kanelite Foam Super E-X have a cell structure called a composite cell having large bubbles and small bubbles, but FIGS. 7 and 8 are not clear and particularly small bubbles are not present. It is clear. However, it is clear that the foam board has flat bubbles.

(Example 3)
The roll receiver produced in the same manner as in Example 2 was cut along a plane perpendicular to the width direction during extrusion foaming of the foam through the center of the opening, and an evaluation sample was prepared to determine load bearing performance. The load bearing performance was 861 kg.

(Comparative Example 1)
350 mm × 350 mm plate-like member using only Kanelite Foam Super-EX (thickness 35 mm, density approx. 40 g / L) as a styrene resin foam board used for roll holders without heat fusion of high impact polystyrene sheet A roll receiver was prepared by cutting out a circular opening having a diameter of 152 mm in the center. The sample was cut along a plane perpendicular to the extrusion direction at the time of extrusion foaming of the foam through the center of the opening, and an evaluation sample was prepared to determine load bearing performance. The load bearing performance was 271 kg.

  The roll holders of Examples 1 to 3 have a significantly improved load resistance as compared with the roll holder of Comparative Example 1 made of only a styrene resin foam board. Moreover, it can be estimated that the plate-like member of the present invention has excellent load resistance even when compared with the roll receiver of the present invention in which the non-foamed resin layer is made of a foam. For example, in the roll receiver of Example 2, when the non-foamed resin layer (thickness 2 mm on both sides) is a foam layer of 40 g / L, the total thickness is 52.5 mm (polystyrene specific gravity is 1.05). Becomes 87.5 mm. Assuming that the load bearing performance is proportional to the thickness of the roll holder and calculating from the load bearing performance of Comparative Example 1, in the roll holder of Example 2, the load bearing performance of the non-foamed resin layer as the foamed layer is 271 kg × 87.5 / 35 = 677 kg. The load bearing performance of the roll receiver of Example 2 is 1154 kg, and the load bearing performance is excellent even when compared with a foamed non-foamed resin layer. In the above calculation, it is assumed that the polystyrene foam and the high-impact polystyrene foam have the same strength.

  Furthermore, the plate-like member of the present invention has excellent load resistance even when compared with the roll receiver of the present invention in which the foam is a non-foamed resin layer. For example, in the plate-like member having the foam density of 40 g / L in Example 2, the foam (thickness 35 mm) made of the non-foamed resin layer is 1.33 mm, and the total thickness is 3.33 mm. When a plate-like member having a thickness of 3.33 mm and a size of 350 × 350 mm is used as the roll holder, the plate-like member is curved and the load resistance will not reach 1154 kg. Thus, the roll receiver of the present invention has a large load resistance with a small weight compared to a roll receiver made of only a foam or a roll receiver made of only a non-foam.

  Moreover, when Example 1 and Example 2 are compared, it turns out that load-carrying performance improves more when the expansion | extension of the extrusion direction of a foam board is larger at the time of extrusion foam board manufacture. Moreover, when Example 2 and Example 3 are compared, it turns out that load bearing performance improves if the direction parallel to the extrusion direction in the extrusion foaming of the styrene resin extruded foam board is the direction that supports the load of the roll.

Schematic explanatory drawing which shows one example of the roll suspension support method by the roll receiver of this invention. The longitudinal cross-sectional view of the roll receiver and roll in a roll suspension support state using the roll receiver. The schematic explanatory drawing of the roll suspension support method of another structure. (A)-(c) is a perspective view of the roll holder of this invention provided with the opening part of (circle) type | mold, U-shape, and a flask type | mold. (A)-(e) is a schematic explanatory drawing which shows an example of the manufacturing method of the roll holder of this invention. (A)-(c) is a schematic explanatory drawing which shows one example of the end surface coating method of the roll holder of this invention. 2 is an optical micrograph near the surface of a foam board used in Example 1. FIG. 4 is an optical micrograph near the surface of the foam board used in Example 2. FIG. Schematic explanatory drawing which shows an example of the manufacturing method of the extrusion foaming board used for this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll holder 2 Plate-shaped member 3 Opening part 3A Opening part 3B Opening part 3C Opening part 4 Connection tool 5 Styrenic resin foam board 6 Non-foaming synthetic resin layer 6A Non-foaming synthetic resin material 6a Main body part 6b Covering part 6c Covering part 7 Cut 8 Fold 10 Roll 11 Wound material 12 Core 15 Heating means 16 Mold 21 Die 22 Mold 23 Mold

Claims (19)

  It consists of a plate-like member having an opening, and is arranged on both sides of the roll, receiving both ends of the core of the roll with the opening to support the roll in a suspended state, and receiving the load of the roll in the plane direction of the plate-like member A roll receiver, wherein the plate-like member is a plate-like member in which a non-foamed synthetic resin layer is bonded to one side or both sides of a styrene resin extruded foam board.   The roll receiver according to claim 1, wherein the plate-like member is a plate-like member in which a non-foamed synthetic resin layer is bonded to both surfaces of a styrene resin extruded foam board.   The roll receiver according to claim 1 or 2, wherein the non-foamed synthetic resin layer and the styrene resin extruded foam board are joined by thermocompression bonding.   The said non-foaming synthetic resin layer consists of a synthetic resin sheet or a synthetic resin board, The roll holder as described in any one of Claims 1-3 characterized by the above-mentioned.   The roll receiver according to any one of claims 1 to 4, wherein the non-foamed synthetic resin layer contains a styrene resin as a main component.   The roll receiver according to any one of claims 1 to 5, wherein at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer is made of a styrene resin having impact resistance.   The roll receiver according to any one of claims 1 to 6, wherein at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer is made of a styrene resin containing a rubber component.   The roll receiver according to any one of claims 1 to 7, wherein at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer is made of a heat resistant styrene resin.   The roll receiver according to any one of claims 1 to 8, wherein at least one of the styrene resin extruded foam board and the non-foamed synthetic resin layer is made of a regenerated styrene resin.   The roll receiver according to any one of claims 1 to 9, wherein the non-foamed synthetic resin layer is made of a styrene resin containing an inorganic filler.   The roll receiver according to claim 1, wherein a direction parallel to an extrusion direction in extrusion foaming of the styrene-based resin extruded foam board is a direction in which a load of the roll is supported.   The roll receiver according to claim 1, wherein the styrene resin extruded foam board is a foam board stretched in the extrusion direction.   The styrene resin extruded foam board is a foam board having flat-shaped bubbles along a direction parallel to the surface of the foam board surface layer, wherein the maximum inner diameter of each bubble is oriented in a substantially constant direction. A roll receiver according to -12.   The roll receiver according to any one of claims 1 to 13, wherein the plate-like member has a polygonal shape.   The roll receiver according to any one of claims 1 to 14, wherein the plate-like member has a rectangular shape.   The roll receiver according to any one of claims 1 to 15, wherein the opening is provided at substantially the center of the plate-like member.   The roll receiver manufacturing method according to any one of claims 1 to 16, wherein a non-foamed synthetic resin synthetic resin sheet or synthetic resin plate is punched into an outer dimension of the roll receiver, and the roll receiver A process for producing a non-foamed synthetic resin material to be a non-foamed synthetic resin layer that punches the opening in correspondence with the opening, punches the styrene resin extruded foam board into the outer dimensions of the roll receiver, and opens the roll receiver Punching out the opening corresponding to the part, producing a styrene resin extruded foam board having an opening, and joining the non-foamed synthetic resin material to one or both sides of the styrene resin extruded foam board having the opening And a method of manufacturing a roll receiver.   The method for manufacturing a roll receiver according to claim 17, wherein, in the joining step, the thermocompression bonding side of the non-foamed synthetic resin material is heated and thermocompression bonded to one or both surfaces of the styrene resin extruded foam board.   In the step of manufacturing the non-foamed synthetic resin material, the non-foamed synthetic resin material is coated with the inner surface of the opening of the styrene resin extruded foam board and / or the outer peripheral end surface of the styrene resin extruded foam board. A covering portion is integrally formed, and in the joining step, a non-foamed synthetic resin material is joined to one or both sides of the styrene resin extruded foam board, and the covering portion is formed on the opening of the styrene resin extruded foam board. The method for manufacturing a roll receiver according to claim 17 or 18, wherein the roll receiver is bonded to the inner surface and / or the outer peripheral end surface of the styrene resin extruded foam board.