JP5685403B2 - Television shock absorber, method for producing television shock absorber, and television - Google Patents

Description

  The present invention relates to a cushioning material for television, a method for manufacturing the cushioning material for television, and a television.

  In televisions equipped with glass display panels such as liquid crystal televisions, a cushioning material using silicone rubber or urethane resin along the outer edge of the display panel between the display panel and the frame that supports the display panel Is arranged (see Patent Documents 1 and 2).

  On the other hand, when the display panel is mounted non-parallel to the frame, the image appears to be distorted because the image display surface of the display panel is curved or inclined. For this reason, the buffer material for television is required to have flatness. In addition, when the power of the display panel is ON, the glass substrate constituting the display panel is thermally expanded by generating heat. In addition to this, even when the television is left in a high temperature environment in summer, the glass substrate constituting the display panel is thermally expanded. Therefore, when the glass substrate and the television buffer are adhered, the thermal expansion coefficients of the two members are different, so that the display panel is distorted due to the temperature change of the display panel. For this reason, it is requested | required that the buffer material for television should be excellent in slidability with respect to the glass substrate which comprises a display panel.

  However, conventional cushioning materials for television made of urethane resin have poor durability and compression set, and may have poor flatness. On the other hand, a conventional television cushioning material using silicone rubber is superior in flatness because it has better durability and compression set than conventional urethane resin television cushioning materials. This conventional buffer material for television using silicone rubber has a layer structure in which an adhesive layer, a polyethylene terephthalate resin film, an adhesive layer, a low hardness silicone rubber layer, and a high hardness silicone rubber layer are laminated in this order. Have. Here, the adhesive material layer is provided to fix the buffer material for the television to the frame, and the low hardness silicone rubber layer is provided to ensure cushioning properties.

  In addition, it is known that silicone rubber has the property that the lower the hardness, the higher the adhesiveness, and the higher the hardness, the lower the adhesiveness. Here, since the low hardness silicone rubber layer has high adhesiveness, the slipperiness cannot be ensured. For this reason, a slipperiness between the buffer material for television and the display panel is ensured by further providing a low-adhesion high-hardness silicone rubber layer on the low-hardness silicone rubber layer.

Japanese Patent Laid-Open No. 2001-092362 JP 2008-033093 A

  However, a conventional cushioning material for television using silicone rubber has a complicated layer structure in which five layers are laminated. For this reason, at the time of production, it is necessary to perform a process corresponding to or related to at least each layer, so that the number of processes increases. For this reason, the buffer material for televisions using the conventional silicone rubber has low productivity and high cost. Therefore, it is necessary to further simplify the layer structure in order to improve productivity and reduce costs while ensuring the same level of slipperiness as that of a conventional cushioning material for television using silicone rubber.

  The present invention has been made in view of the above circumstances, and has a slipperiness comparable to that of a conventional television cushion material using silicone rubber, and a simpler layered television cushion material, and a method for manufacturing the same. Another object is to provide a television using the television cushioning material.

The above-mentioned subject is achieved by the following present invention. That is,
The method for producing a cushioning material for a television of the present invention comprises a cover base material having at least one rough surface, a rough surface of the cover base material, an unvulcanized silicone rubber and a foaming agent. A first sheet having an unvulcanized rubber layer contained as a component, a carrier base material, an adhesive layer provided in contact with one side of the carrier base material, and provided on the adhesive material layer By pressing the second sheet having a resin film, the surface of the first sheet provided with the unvulcanized rubber layer and the surface of the second sheet provided with the resin film layer, A laminate forming step for forming a laminate in which the first sheet and the second sheet are bonded together, and a vulcanization / foaming step in which the laminate is heated to vulcanize and foam the unvulcanized rubber layer; At least, the main component is an adhesive layer, a resin film, and silicone rubber A foamed rubber layer containing by, but is characterized in that to produce the television cushioning material are laminated in this order.

  In one embodiment of the method for producing a cushioning material for television of the present invention, the first sheet and the second sheet are strip-like long sheets, and are continuously conveyed in the longitudinal direction of the sheets in the laminate forming step. The first sheet and the second sheet continuously conveyed in the longitudinal direction of the sheet are continuously bonded in a state where the longitudinal directions of the first sheet and the second sheet are matched. In the vulcanization / foaming process, a belt-shaped laminate is continuously formed, and the belt-shaped laminate continuously formed through the laminate formation step is heat-treated while being conveyed in the longitudinal direction of the laminate. Is preferable.

  The television cushioning material of the first aspect of the present invention is produced by the method for producing a television cushioning material of the present invention.

The television cushioning material of the second aspect of the present invention has a foamed rubber layer containing silicone rubber as a main component, a resin film, and an adhesive material layer laminated in this order, and the foamed structure in the thickness direction of the foamed rubber layer is substantially the same. It is uniform, there is a recess due to the foamed cell on the surface opposite to the side where the resin film of the foamed rubber layer is provided, and the measurement procedures shown in the following (1) to (4) are sequentially executed. Thus, the maximum tensile load measured as the frictional force on the surface opposite to the side on which the resin film of the foam rubber layer is provided is 3N or less.
<Measurement procedure>
(1) Two TV buffer material samples (width 2 mm, length 140 mm) are placed on an aluminum plate whose upper surface coincides with a horizontal plane, and at a distance of 25 mm parallel to each other so that the adhesive layer is on the lower surface side. Place and paste to fix.
(2) Next, an acrylic resin plate (vertical 70 mm, horizontal 50 mm) is placed on the two television buffer materials fixed on the aluminum plate, and the longitudinal direction of the television buffer material sample and the vertical length of the acrylic resin plate. It arrange | positions so that a direction may correspond, and applies a load of 1.70N with respect to two buffer materials for TV through an acrylic resin board.
(3) Thereafter, the acrylic resin plate is pulled with the pulling speed set to 10 mm / s and the pulling distance amount set to 10 mm with respect to the longitudinal direction of the acrylic resin plate. Then, during this pulling period, the friction force between the upper surface of the two TV cushioning material samples and the lower surface of the acrylic resin plate is used as a change in the load value with an increase in the pulling distance. Measured by RTC-1210A, manufactured by Kuh company.
(4) Here, the load value indicating the maximum value is obtained as the maximum tensile load among the load values corresponding to the increase in the measured tensile distance.

In one embodiment of the television cushioning material of the second aspect of the present invention, it is preferable that the surface opposite to the side on which the resin film of the foam rubber layer is provided is a matte surface.

In other embodiments of the first to second present invention, it is preferable that the foamed rubber layer has a hardness of 50 ° or less.

It is preferable that the other embodiment of the buffer material for television of the first to second inventions is used as a buffer material for a television provided with a display panel using a glass substrate.

In another embodiment of the buffer material for television of the first to second inventions, the display panel is preferably a liquid crystal display panel.

The television of the present invention includes a display panel using a glass substrate, a frame that supports the display panel, and a television of the first to second inventions that is disposed between the display panel and the frame. Any one of the buffer materials for televisions selected from the buffer materials for televisions is provided.

  In one embodiment of the television of the present invention, the display panel is preferably a liquid crystal display panel.

  According to the present invention, the television cushioning material having the same degree of slipperiness as that of a conventional television cushioning material using silicone rubber and a simpler layered television cushioning material, its manufacturing method, and the television cushioning material are provided. The used television can be provided.

It is a side view explaining the measuring method of the frictional force of the foam rubber layer surface. 4 is a graph showing an example of a change in load value F with respect to a pull distance D. It is a schematic diagram which shows one process of the manufacturing method of the buffer material for televisions of this embodiment. It is a schematic diagram which shows the other process of the manufacturing method of the buffer material for televisions of this embodiment. It is a schematic cross section shown about the layer structure of the 1st sheet | seat and the 2nd sheet | seat before bonding. It is a schematic cross section shown about the layer structure of the laminated body which bonded together the 1st sheet | seat and the 2nd sheet | seat. It is a schematic cross section shown about the layer structure of the buffer material for televisions of this embodiment. It is an expanded sectional view which expands and shows the foaming rubber layer shown in FIG. It is a schematic cross section shown about the television of this embodiment. It is a schematic cross section shown about the layer structure of the buffer material for televisions of the comparative example 3.

  The method for manufacturing a cushioning material for a television according to the present embodiment includes a cover base having at least one rough surface, a rough surface of the cover base, and an unvulcanized silicone rubber and a foaming agent. A first sheet having an unvulcanized rubber layer containing as a main component, a carrier base material, an adhesive layer provided in contact with one side of the carrier base material, and provided on the adhesive material layer A second sheet having a resin film and a surface of the first sheet provided with an unvulcanized rubber layer and a surface of the second sheet provided with a resin film layer , A laminate forming process for forming a laminate in which the first sheet and the second sheet are bonded together, and a vulcanization / foaming process in which the laminate is heated to vulcanize and foam the unvulcanized rubber layer And at least the adhesive layer, the resin film, and the silicone rubber A foamed rubber layer containing a minute, but is characterized in that to produce the television cushioning material are laminated in this order.

  The television cushioning material produced by the method for producing a television cushioning material of this embodiment is a foamed rubber layer (hereinafter abbreviated as “foamed rubber layer”) containing an adhesive material layer, a resin film, and silicone rubber as main components. May have a three-layer structure laminated in this order, compared to a conventional five-layer TV cushioning material using silicone rubber (hereinafter sometimes referred to as “conventional product”). The configuration is simpler. Here, the adhesive material layer is used for adhering and fixing the television buffer material to the frame, and in the television, the surface of the foam rubber layer is in contact with the glass substrate of the display panel. It will be. In addition to the elasticity of the rubber material, the foamed rubber layer has a foamed cell, so that the cushioning property necessary as a cushioning material for television can be ensured.

  However, since this foamed rubber layer contains a low-hardness silicone rubber having foamed cells as a main component, it is inherently highly adhesive. For this reason, it seems that the slidability with respect to the glass substrate of a display panel is significantly inferior compared with a conventional product. On the other hand, the foamed rubber layer is provided by contacting the rough surface of the cover base material, and is formed by vulcanizing and foaming an unvulcanized rubber layer containing unvulcanized silicone rubber and a foaming agent as main components. . That is, the surface of the foam rubber layer is a surface to which the rough surface of the cover base material is transferred. For this reason, since the entire surface of the foamed rubber layer is a rough surface having irregularities, the true contact area between the surface of the foamed rubber layer and the glass substrate of the display panel becomes very small. Therefore, even if the adhesiveness on the surface of the foam rubber layer is high, the adhesiveness between the surface of the foam rubber layer and the glass substrate of the display panel is low, and the same good slipperiness as the conventional product Is obtained.

In addition, the buffer material for televisions of this embodiment produced by the manufacturing method of the buffer material for televisions of this embodiment demonstrated above is the characteristic shown to following (i)-(iv), or (i)-( It has at least the characteristics shown in iii) and (v).
(I) As already described, the television cushioning material of this embodiment has a layer configuration in which a foamed rubber layer, a resin film, and an adhesive material layer are laminated in this order.
(Ii) In the television cushioning material of the present embodiment, the foam structure in the thickness direction of the foam rubber layer is substantially uniform.
(Iii) In the television cushioning material of the present embodiment, there is a recess due to the foamed cell on the surface (foamed rubber layer surface) opposite to the side where the resin film of the foamed rubber layer is provided.
(Iv) In the television cushioning material of the present embodiment, the maximum tensile load measured as the frictional force on the surface (foam rubber layer surface) opposite to the side where the resin film of the foam rubber layer is provided is 3N or less. .
(V) In the television cushioning material of this embodiment, the surface (foam rubber layer surface) opposite to the side where the resin film of the foam rubber layer is provided is the matte surface.

  The television cushioning material of the present embodiment having the characteristics as described above can be manufactured by the above-described method for manufacturing the television cushioning material of the present embodiment, but of course, the television cushioning material can be manufactured by other manufacturing methods. May be.

  Here, (ii) the reason why the foam structure in the thickness direction of the foamed rubber layer is substantially uniform is that the unvulcanized rubber layer is sandwiched between the cover base material and the resin film and vulcanized / foamed. This is because the process is performed. That is, in the vulcanization / foaming step, the unvulcanized rubber layer is not directly heated but indirectly heated through the cover base material and the resin film. For this reason, the temperature distribution in the thickness direction of the unvulcanized rubber layer hardly occurs and becomes substantially uniform, and substantially uniform vulcanization / foaming occurs in the thickness direction of the unvulcanized rubber layer.

  Also, (iii) the reason for the presence of the concave portion due to the foamed cell on the surface (foamed rubber layer surface) opposite to the side where the resin film of the foamed rubber layer is provided is that one side of the unvulcanized rubber layer covers This is because the vulcanization / foaming step is carried out in a state where it is in contact with the substrate. That is, the portion of the unvulcanized rubber layer near the cover base is covered with the cover base. For this reason, when the gas is generated by foaming in the vicinity of the cover base material side of the unvulcanized rubber layer during the vulcanization / foaming step, the gas cannot escape to the outside. For this reason, the gas generated by foaming forms a foam cell between the portion of the unvulcanized rubber layer near the cover base and the cover base. For this reason, when the foamed rubber layer and the cover base material are separated from each other after at least the vulcanization / foaming step, a recess due to the foamed cell exists on the surface of the foamed rubber layer.

  Also, (iv) the reason why the maximum tensile load measured as the frictional force on the surface (foamed rubber layer surface) opposite to the side on which the resin film of the foamed rubber layer is provided is 3N or less is as described above. This is because the surface of the foamed rubber layer has a recess due to the foamed cell, and is a surface to which the rough surface of the cover base material is transferred, so that the real contact area with the display panel can be further reduced. Here, when the surface of the foamed rubber layer satisfies the above-described conditions, the irregular reflection of visible light incident on the surface of the foamed rubber layer becomes significant. Therefore, as shown in the above (v), the surface of the foamed rubber layer is It becomes a matte surface. The maximum tensile load is preferably 2N or less, and the lower limit is preferably closer to 0N.

Here, the maximum tensile load is determined by carrying out the measurement methods shown in the following (1) to (4).
(1) Two TV buffer material samples (width 2 mm, length 140 mm) are placed on an aluminum plate whose upper surface coincides with a horizontal plane, and at a distance of 25 mm parallel to each other so that the adhesive layer is on the lower surface side. Place and paste to fix.
(2) Next, an acrylic resin plate (vertical 70 mm, horizontal 50 mm) is placed on the two television buffer materials fixed on the aluminum plate, and the longitudinal direction of the television buffer material sample and the vertical length of the acrylic resin plate. It arrange | positions so that a direction may correspond, and applies a load of 1.70N with respect to two buffer materials for TV through an acrylic resin board.
(3) Thereafter, the acrylic resin plate is pulled with the pulling speed set to 10 mm / s and the pulling distance amount set to 10 mm with respect to the longitudinal direction of the acrylic resin plate. Then, during this pulling period, the friction force between the upper surface of the two TV cushioning material samples and the lower surface of the acrylic resin plate is used as a change in the load value with an increase in the pulling distance. Measured by RTC-1210A, manufactured by Kuh company.
(4) Here, the load value indicating the maximum value is obtained as the maximum tensile load among the load values corresponding to the increase in the measured tensile distance.

  FIG. 1 is a side view illustrating a method for measuring the frictional force on the surface of the foam rubber layer. As shown in FIG. 1, when measuring the frictional force, a measurement sample (buffer material for TV, width 2 mm, length 140 mm) 20 is attached and fixed on an aluminum plate 10, and a weight is further placed on the measurement sample. 30 is arranged. In addition, the aluminum plate 10 is arrange | positioned so that the upper surface 10T may correspond with a horizontal surface. Further, the length of the aluminum plate 10 in the width direction (left-right direction in FIG. 1) is substantially the same as that of the measurement sample 20. Two measurement samples 20 are arranged on the upper surface 10T of the aluminum plate 10 at a distance of 25 mm in parallel so that the longitudinal direction thereof coincides with the width direction of the aluminum plate 10. In FIG. 1, in addition to the measurement sample 20 clearly shown on the paper surface, another measurement sample 20 (not shown in FIG. 1) is arranged on the back side of the paper surface. The weight 30 includes a plate-like support 32 made of an iron plate, an acrylic resin plate 34 attached and fixed to the lower surface 32B of the plate-like support 32, and a central portion of the upper surface 32T of the plate-like support 32. And a weight main body 36 disposed in the position. The plate-like support body 32 and the acrylic resin plate 34 have the same size (length 70 mm, width 50 mm), and the plate-like support body 32 and the acrylic resin plate 34 are bonded so that their surfaces completely overlap each other. Yes. And the weight 30 is arrange | positioned in the center part vicinity of the width direction of the aluminum plate 10 so that the lower surface 34B of the acrylic resin board 34 may contact with the upper surface 20T of the measurement sample 20. FIG. In this case, the weight 30 is disposed so that the longitudinal direction of the acrylic resin plate 34 matches the longitudinal direction of the measurement sample 20. In this state, a load of 1.7 N is applied to the upper surface 20T of the measurement sample 20.

  In addition, one end of a metal wire 40 is connected to the end surface 32 </ b> S facing the one side (left side in the drawing) of the width direction of the aluminum plate 10 among the end surfaces of the plate-like support body 32. The other end of the wire 40 is connected to a Tensilon tester 50 (Orientec Corp., RTC-1210A) disposed obliquely above the aluminum plate 10 (upper left in the figure). A pulley 60 is disposed at a position substantially opposite to the end face 32S. Here, the wire 40 is stretched between the end face 32S and the pulley 60 so as to be parallel to the horizontal plane and parallel to the longitudinal direction of the measurement sample 20, and from the pulley 60 to the Tensilon testing machine 50. It is stretched so as to coincide with the vertical direction. In addition, in the horizontal direction parallel to the end face 32S, the connection position between the end face 32S and the wire 40 is located between the two measurement samples 20.

  Here, the Tensilon tester 50 is pulled upward in the vertical direction by a drive device (not shown). At this time, the weight 30 is pulled toward the pulley 60, that is, in the direction of arrow P in the drawing. The pulling at this time is performed by setting the pulling speed to 10 mm / s and the pulling distance amount to 10 mm. Then, during this pulling period, the friction force between the upper surface 20T of the two measurement samples 20 and the lower surface 34B of the acrylic resin plate 34 is defined as a change in the load value with an increase in the pulling distance, and the Tensilon tester 50. Measure with At this time, as shown in FIG. 2, a graph showing the change of the load value F with respect to the pulling distance D is obtained. And the maximum value Fmax of the load value F in the range whose pulling distance D is 0 mm-10 mm is calculated | required as a maximum tensile load.

  In the method for manufacturing a cushioning material for a television of the present embodiment, it can be implemented by a batch production method using a square-shaped first sheet and a square-shaped second sheet, but from the viewpoint of improving productivity. Is particularly preferably carried out by a continuous production method. When the continuous production method is adopted, strip-like long sheets are used as the first sheet and the second sheet. In the laminated body forming step, the first sheet and the second sheet that are continuously conveyed in the longitudinal direction of the sheet and the second sheet that is continuously conveyed in the longitudinal direction of the sheet By continuously bonding the sheets in a state in which the longitudinal directions of the sheets coincide with each other, a band-shaped laminate is continuously formed. Subsequently, in the vulcanization / foaming step, the belt-like laminate formed continuously through the laminate formation step is heat-treated while being conveyed in the longitudinal direction of the laminate. In addition, it is especially preferable that the conveyance speed of the laminated body in the vulcanization / foaming process is set to be the same as the conveyance speed of the first sheet and the second sheet in the laminated body forming process.

  The first sheet used in the method for manufacturing a cushioning material for television of the present embodiment is obtained by applying a rubber material containing unvulcanized silicone rubber and a foaming agent as main components to one side (rough surface) of a cover base material. It is produced by forming an unvulcanized rubber layer. In addition, when using the strip | belt-shaped long sheet | seat used for a continuous production system as a 1st sheet | seat, a strip | belt-shaped long sheet | seat is also used for a cover base material. And an unvulcanized rubber layer is continuously formed in the single side | surface of a cover base material using a calender roll machine. In addition, the cover base material should just be a rough surface at least one side. Here, the “rough surface” means a range in which the surface roughness (centerline average roughness Ra) is about 0.2 μm to 2.0 μm. The material which comprises a cover base material will not be specifically limited if it can deform | transform moderately with respect to the external force added in a series of manufacturing processes, and has heat resistance with respect to the heat processing in a series of manufacturing processes. However, in view of the above-described viewpoint and practicality, a polyethylene terephthalate (PET) resin is preferable as a material constituting the cover base material. Moreover, as a cover base material, the commercially available resin film whose one side is a rough surface can be utilized. In addition, in the commercially available resin film in which both surfaces form a smooth surface, both surfaces form a glossy surface when visually observed. However, in a commercially available resin film (so-called wrinkled resin film) having at least one surface, the rough surface When the side is observed visually, it forms a matte surface. In addition, the roughness of the rough surface which forms such a matte surface has a surface roughness (centerline average roughness Ra) of approximately 0.2 μm or more.

  In addition, the material and thickness which comprise the 2nd sheet | seat used for the manufacturing method of the buffer material for televisions of this embodiment can also be deform | transformed moderately with respect to the external force added in a series of manufacturing processes, and in a series of manufacturing processes It will not specifically limit if it has heat resistance with respect to heat processing. However, in consideration of the above-mentioned viewpoint and practicality, it is preferable that the carrier base material constituting the second sheet and the material constituting the resin film are also polyethylene terephthalate (PET) resins. Moreover, as a material which comprises an adhesive material layer, a well-known adhesive agent can be utilized if it is an adhesive agent which adhesiveness does not lose | disappear by the heat | fever added in a series of manufacturing processes, for example, an acrylic adhesive can be utilized.

  The sheet obtained after the vulcanization / foaming process is a sheet in which an adhesive layer, a resin film, a foam rubber layer, and a cover base material are laminated in this order on one side of a carrier base material. It is. Here, the members and layers finally used as the buffer material for television are an adhesive material layer, a resin film, and a foamed rubber layer. For this reason, you may implement the peeling process which peels a cover base material as needed. In addition, the carrier base material is normally kept in contact with the adhesive material layer until just before the television cushioning material is used in the assembly of the television. The reason for this is to prevent the adhesiveness of the surface of the adhesive material layer on the side where the carrier base material is provided (the surface attached to the frame of the television) from being deteriorated.

  Furthermore, the sheet obtained after the vulcanization / foaming process has a size that allows a plurality of band-shaped television buffer materials to be collected from the viewpoint of improving productivity. For this reason, the cutting process which cut | disconnects the sheet | seat produced in the stage which finished the vulcanization | foaming process normally to a predetermined size is implemented. In this cutting step, it is basically preferable to cut only each member / layer except the carrier base material. As a result, a plurality of television cushioning materials are fixedly arranged on a single large-sized carrier base material, so that the handling of the cushioning materials for televisions in shipping to an assembly manufacturer of the television is improved. Excellent.

  Moreover, you may implement a cutting process in 2 steps or more as needed. For example, in the case of the continuous production method, the sheet obtained after the vulcanization / foaming process is a strip-like long sheet that is continuous in the longitudinal direction. For this reason, the 1st cutting process which obtains a square sheet by cut | disconnecting this elongate sheet | seat including a carrier base material with a fixed space | interval with respect to a longitudinal direction is implemented. Next, by cutting only the members and layers excluding the carrier base material, a second cutting step for cutting the rectangular sheet into a size that can be used as a cushioning material for a television can be performed. . In addition, for the sheet obtained at the stage of completing the vulcanization / foaming process, a second vulcanization process is performed as necessary in order to ensure the vulcanization treatment of the foamed rubber layer. May be.

  FIG. 3 and FIG. 4 are schematic diagrams showing one process of the method for manufacturing the television cushioning material of the present embodiment. Specifically, an example in the case of producing the television cushioning material by the continuous production method is shown. It is a thing. FIG. 3 is a diagram for explaining a first sheet manufacturing method using a calendar roll machine, and FIG. 4 is a diagram for explaining a laminate forming process and a vulcanization / foaming process.

  First, in producing the first sheet, a calendar roll machine 100 shown in FIG. 3 is used. This calender roll machine 100 supplies the cover base material SC between the press roll 102, the rubber raw material supply roll 104 opposed to the press roll 102, and the press roll 102 and the rubber raw material supply roll 104. A cover base material supply roll 106, a winding roll 108 for winding the first sheet S1 discharged from between the pressing roll 102 and the rubber raw material supply roll 104, and a roll driving motor (not shown). . Here, the pressing roll 102 and the rubber raw material supply roll 104 can pass the cover base SC between them (coating area C), and an appropriate pressing force is applied to the cover base SC. Has been placed. When the first sheet S1 is manufactured, the pressing roll 102 rotates in the clockwise direction (in the direction of arrow R1 in the drawing), and the rubber raw material supply roll 104 rotates in the counterclockwise direction (in the direction of arrow R2 in the drawing). To do. Further, the cover base material supply roll 106 is arranged on the upstream side in the transport direction of the cover base material SC in the coating area C (left side of the pressing roll 102 in the drawing). The cover base SC is wound around the cover base material supply roll 106 so that the rough surface faces the outer peripheral side, and the rough surface becomes the rubber raw material supply roll 104 side when passing through the coating area C. It arrange | positions so that it may oppose and contact.

  On the other hand, the rubber raw material adjusted to a predetermined composition by a kneader or the like is supplied to the outer peripheral surface of the rubber raw material supply roll 104 on the side substantially opposite to the side where the pressing roll 102 is disposed by a rubber raw material supply device (not shown). The And the rubber raw material provided on the outer peripheral surface of the rubber raw material supply roll 104 is carried to the coating area C by the rotation of the rubber raw material cover base material supply roll 106 in the counterclockwise direction (arrow R1 direction).

  Therefore, when the cover base SC passes through the coating area C, the rubber raw material is applied to the rough surface side of the cover base SC, and the cover base SC is pressed by the pressing force of the pressing roll 102 and the rubber raw material supply roll 104. A rubber raw material is stretched into a thin film on the rough surface side of the material. Thereby, the 1st sheet | seat S1 in which the unvulcanized rubber layer was formed in the rough surface side of the cover base material SC discharged | emitted from the coating area C is obtained. And this 1st sheet | seat S1 is wound up by the winding roll 108 so that an unvulcanized rubber layer may face the outer peripheral side. The winding roll 108 is disposed on the downstream side in the transport direction of the cover base SC in the coating area C (on the right side of the pressing roll 102 in the drawing).

  Next, using the first sheet S1 and the second sheet, a laminate forming process and a vulcanizing / foaming process are continuously performed by the laminating apparatus 110 and the heating furnace 112 shown in FIG. Here, the laminating apparatus 110 shown in FIG. 4 includes a first laminating roll 120, a second laminating roll 122 disposed opposite to the first laminating roll 120, and a first laminating apparatus. A first sheet supply roll 124 that supplies the first sheet S1 between the roll 120 and the second laminate roll 122, and a second sheet S2 between the first laminate roll 120 and the second laminate roll 122. The second sheet supply roll 126 is configured to supply a roll driving motor (not shown). Further, for the purpose of improving the stability of conveyance of the sheet-like member such as the first sheet S1, a conveyance roll 128 is disposed at an appropriate position.

  Here, the first laminating roll 120 and the second laminating roll 122 allow the first sheet S1 and the second sheet S2 to pass through between them (laminating area L). -It arrange | positions so that the pressing force required for bonding may be added with respect to 1st sheet | seat S1 and 2nd sheet | seat S2 which simultaneously pass through the area L. FIG. Then, when forming the laminated body in which the first sheet S1 and the second sheet S2 are bonded together, the first laminating roll 120 rotates in the clockwise direction (the direction of the arrow R3 in the figure), and the second Laminate roll 122 rotates counterclockwise (in the direction of arrow R4 in the figure).

  The first sheet supply roll 124 is disposed on the upstream side in the conveyance direction of the first sheet S1 in the laminate area L (on the left side of the first laminate roll 120 in the figure). As the first sheet supply roll 124, the take-up roll 108 around which the first sheet S1 is taken up is used as it is. Further, the second sheet supply roll 126 is arranged on the upstream side in the transport direction of the second sheet S2 in the laminating area L (above the second laminating roll 122 in the figure). The second sheet S2 is wound around the second sheet supply roll 126 so that the surface on which the resin film is provided faces the outer peripheral surface.

  Here, when the first sheet S1 supplied from the first sheet supply roll 124 passes through the laminating area L, the surface on the cover substrate side comes into contact with the outer peripheral surface of the first laminating roll 120. Supplied. Further, the second sheet S2 supplied from the second sheet supply roll 126 is supplied so that the surface on the carrier substrate side comes into contact with the outer peripheral surface of the second laminate roll 122 when passing through the laminate area L. Is done. When the first sheet S1 and the second sheet S2 pass through the laminate area L at the same time, the first laminate roll 120 and the second laminate roll are applied to the two sheets S1 and S2. A pressing force is applied by 122. For this reason, the surface on the unvulcanized rubber layer side of the first sheet S1 passing through the laminate area L and the surface on the resin film side of the second sheet S2 are continuously bonded, and the laminate SL is continuous. Formed. And the laminated body SL is discharged | emitted from the opposite side to the side into which the 1st sheet | seat S1 and 2nd sheet | seat S2 of the lamination area L approach.

  The laminated body SL discharged from the laminating area L is conveyed to the heating furnace 112 disposed on the downstream side of the laminating area L in the conveying direction, and is conveyed in the heating furnace 112 in one direction. At this time, the laminate SL is heated, and vulcanization and foaming of the unvulcanized rubber layer proceeds. Further, as the vulcanization of the unvulcanized rubber layer proceeds, the adhesion at the interface between the unvulcanized rubber layer and the resin film is improved. In addition, as heating temperature in the heating furnace 112, the inside of the range whose maximum temperature is about 150 to 200 degreeC is preferable. Further, the heating time (the time required for the laminate SL to pass through the heating furnace 112) is preferably within a range of about 1 to 3 minutes. And the laminated body SL which finished this heat processing is cut | disconnected to a predetermined size, and the buffer material for televisions is obtained. In addition, you may implement heat processing for the laminated body SL which finished heat processing in order to perform the secondary vulcanization which makes the vulcanization reaction of a foamed rubber layer progress further. Further, in order to further improve the adhesion at the bonding interface between the foamed rubber layer and the resin film, the surface of the second sheet S2 on which the resin film is provided is corona-coated before the laminated body forming step. Surface treatment may be performed in advance by discharge or the like.

  Next, the layer structure of the television cushioning material of the present embodiment and the first sheet, the second sheet, and the laminate used in the manufacturing process will be described. FIG. 5 is a schematic cross-sectional view illustrating the layer structure of the first sheet and the second sheet before bonding. Here, the first sheet 200 shown in the upper part of FIG. 5 has a cover base material 202 and an unvulcanized rubber layer 204 provided in contact with the rough surface 202R of the cover base material. 5 includes a carrier base material 212, an adhesive material layer 214 provided in contact with one surface of the carrier base material 212, and a carrier base material 212 of the adhesive material layer 214. And a resin film 216 provided in contact with the surface opposite to the provided side.

  And in a laminated body formation process, the surface (lamination surface) 200L of the side in which the unvulcanized rubber layer 204 of the 1st sheet 200 was provided, and the side in which the resin film 216 of the 2nd sheet 210 was provided. The surface (bonding surface) 210L is bonded to obtain a laminate 230 shown in FIG. The laminate 230 has a layer structure in which an adhesive layer 214, a resin film 216, an unvulcanized rubber layer 204, and a cover substrate 202 are laminated in this order on one surface of a carrier substrate 212.

  Then, the laminated body 230 shown in FIG. 6 is heat-processed, and the unvulcanized rubber layer 204 is vulcanized / foamed. Thereby, as shown in FIG. 7, the buffer material 250 for television by which the adhesive material layer 214, the resin film 216, and the foamed rubber layer 240 were laminated | stacked in this order can be obtained. Note that the television cushioning material 250 shown in FIG. 7 shows a state where only the cover base material 202 is peeled from the television cushioning material 250 after the vulcanization / foaming treatment. And in order to protect the adhesiveness of the adhesive material layer 214, the carrier base material 212 remains adhered to the surface of the adhesive material layer 214 opposite to the side where the resin film 216 is provided. Yes.

  Further, as shown in the enlarged sectional view of FIG. 8, the foamed rubber layer 240 has foam cells 242 dispersed substantially uniformly in the thickness direction, and the foam structure in the thickness direction is substantially uniform. Further, the surface 244 of the foam rubber layer 240 has a recess 246 due to the foam cell 242. In addition to this, a region of the surface 244 where the recess 246 is not formed has a shape corresponding to the rough surface of the cover base material 202. For this reason, light is irregularly reflected on the surface 244 and becomes a matte surface when viewed with the naked eye. In addition, when the television cushioning material 250 is used for assembling the television, the entire surface of the surface 244 where the recess 246 is not formed does not contact the display panel, but a part of this region ( Only the protruding part) is in contact with the frame. Therefore, the true contact area between the display panel and the surface 244 can be made very small. For this reason, even if the foamed rubber layer 240 has a low hardness of about 20 °, that is, a high adhesiveness, an increase in the frictional force between the display panel and the surface 244 can be suppressed.

  The hardness of the foamed rubber layer 240 can be controlled by appropriately selecting the density and size of the foamed cells 242 so that an appropriate cushioning property necessary for the television cushioning material 250 can be obtained. It is preferably in the range of °, more preferably in the range of 15 ° to 30 °. The hardness of the foam rubber layer 240 means a value measured according to JIS K-6253.

  Further, the thickness of the foam rubber layer 240 is preferably in the range of about 150 μm to 5000 μm from the viewpoint of securing an appropriate cushioning property. Moreover, the thickness of the resin film 216 is not particularly limited, but it is preferable to set the thickness within a range of about 50 μm to 125 μm in practice. The thickness of the pressure-sensitive adhesive layer 214 is not particularly limited, but is practically preferably in the range of about 15 μm to 50 μm.

  The television cushioning material 250 of this embodiment is used for assembling a television provided with a display panel using a glass substrate. A typical example of a display panel using a glass substrate is a liquid crystal display panel, but other examples include a plasma display panel. FIG. 9 is a schematic sectional view showing an example of a television using the television cushioning material of the present embodiment, and is a sectional view showing the vicinity of a portion where the television cushioning material is arranged in the television. Note that in FIG. 9, the details of the cross-sectional structure of the display panel, the frame, and other members constituting the television other than the television cushioning material and the television cushioning material are omitted. A television 300 illustrated in FIG. 9 includes a frame 310 and a display panel 320 disposed so as to be fitted in a recess 312 provided on one side of the frame 310. The television cushioning material 250 is disposed between the display panel 320 and the top surface 314T of the convex portion 314 provided so as to protrude from the side wall surface of the concave portion 312. When the television 300 is assembled, the television buffer 250 is bonded to the top surface 314T and fixed so that the surface of the television cushion 250 on the adhesive layer 214 side is bonded to the top surface 314T. To do. Then, the display panel 320 is fitted into the recess 312 of the frame 310 so that the surface of the foam rubber layer 250 of the cushioning material 250 for television and the surface of the glass substrate constituting the display panel 320 are in contact with each other.

  Hereinafter, the present invention will be described with reference to examples. However, the present invention is not limited to the following examples.

(Example 1)
Using the calendar roll machine 100 shown in FIG. 3 and the laminating apparatus 110 and the heating furnace 112 shown in FIG.

First, as a belt-like cover base material 202, a PET film with a texture (thickness 0.075 mm, width 300 mm, one surface is a smooth surface, the other surface is a rough surface (Ra = 0.3 μm), manufactured by Panac Corporation) Prepared. And the 1st sheet | seat 200 was obtained by forming the 1.0-mm-thick unvulcanized rubber layer 204 in the rough surface 202R of this PET film using the calendar roll machine 100 shown in FIG. In addition, the rubber raw material used for formation of the unvulcanized rubber layer 204 used what knead | mixed each material shown below with the mixing roll.
<Rubber raw material composition>
Silicone rubber (Shin-Etsu Chemical Co., Ltd., KE-561UA): 100 parts by weightVulcanizing agent (Shin-Etsu Chemical Co., Ltd., C25-A / B)
C25-A: 0.5 parts by weight, C25-B: 2.0 parts by weight, foaming agent (manufactured by Shin-Etsu Chemical Co., Ltd., KEP26): 3.0 parts by weight, colorant (manufactured by Shin-Etsu Chemical Co., Ltd., W2) ): 4.0 parts by weight

  Further, the second sheet 210 (thickness 0.175 mm, width 300 mm) was used in which the layers constituting this sheet were laminated in advance. The carrier substrate 212 is a PET film having a thickness of 0.125 mm (S-10, manufactured by Toray Industries Inc.), and the adhesive layer 214 is made of an acrylic adhesive (manufactured by Panac Corporation) having a thickness of 0.025 mm. The resin film is a PET film having a thickness of 0.025 mm (S-10, manufactured by Toray Industries, Inc.).

  Next, using the first sheet 200 and the second sheet 210, the formation of the laminate 230 and the vulcanization / foaming treatment are continuously performed using the laminating apparatus 110 and the heating furnace 112 shown in FIG. Carried out. At this time, the conveying speed of the first sheet 200, the second sheet 210, and the laminate 230 is set to 2.0 m / min, and the heating temperature and heating time of the laminate 230 are set to a maximum temperature of 200 ° C. and 2 minutes, respectively. Set to. However, the “heating time” mentioned here means the time from when a certain point in the longitudinal direction of the laminated body 230 enters the heating furnace 112 until it is discharged.

  About the laminated body 230 which finished the vulcanization / foaming process after peeling the cover base material, it cut | disconnects every 500 mm with respect to the longitudinal direction (primary cutting), and 150 degreeC and the secondary vulcanization process for 120 minutes Was further cut (secondary cutting) so as to be 480 mm long and 2.0 mm wide. As a result, a shock-absorbing material for television with a carrier substrate 212 attached on one side was obtained.

  It was found that the thickness of the foam rubber layer 240 of the obtained buffer material for television was 2.0 mm, which was twice the thickness of the unvulcanized rubber layer 204. Further, when the surface 244 of the foam rubber layer 240 was visually observed under fluorescent lamp illumination, it was confirmed to be a matte surface. Further, the surface 244 and the cross section of the foamed rubber layer 240 were observed with an optical microscope. As a result, the surface 244 has a recess 246 due to the foam cell 242, and the size and density of the foam cell 242 existing in the thickness direction of the foam rubber layer 240 are similar, and in the thickness direction. It was found that the foam structure was substantially uniform. From the above observation results, it was found that the obtained television cushioning material had the same layer structure as the television cushioning material 250 shown in FIGS. Further, the hardness of the foam rubber layer 240 was measured and found to be 20 °.

(Comparative Example 1)
Except for using a PET film (S-56, manufactured by Toray Industries, Inc.) having a smooth surface on both sides as the cover substrate 202, it is for a television with a carrier substrate 212 on one side in the same manner as in Example 1. A buffer material was prepared.

  It was found that the thickness of the foamed rubber layer of the obtained cushioning material for television was 2.0 mm, which was twice the thickness of the unvulcanized rubber layer 204 as in Example 1. Further, when the surface of the foam rubber layer was visually observed under fluorescent lamp illumination, it was confirmed to be a glossy surface. Moreover, the surface and cross section of the foamed rubber layer were observed with an optical microscope. As a result, there are recesses due to the foam cells on the surface, the size and density of the foam cells existing in the thickness direction of the foam rubber layer are the same, and the foam structure in the thickness direction is substantially uniform. It turned out that. From the above results, the obtained television cushioning material is the same as the television cushioning material of Example 1 except that the surface of the foamed rubber layer is composed of the surface to which the smooth surface of the cover base material 202 is transferred. It is thought that it has the structure of. Further, when the hardness of the foamed rubber layer was measured, it was 20 ° as in Example 1.

(Comparative Example 2)
Using the calender roll machine 100 shown in FIG. 3, the rubber sheet used in Example 1 is used for the unvulcanized surface of the second sheet 210 used in Example 1 on which the resin film 216 is provided. A rubber layer was formed. The unvulcanized rubber layer has the same thickness as the unvulcanized rubber layer 204 of the first sheet 200 used in Example 1.

  Subsequently, using a laminate in which an unvulcanized rubber layer is formed on one side of the second sheet 210, under the same conditions as in Example 1, vulcanization / foaming treatment using the heating furnace 112, primary cutting Secondary vulcanization treatment and secondary cutting were performed to obtain a television cushioning material with a carrier substrate 212 on one side.

  It was found that the thickness of the foam rubber layer of the obtained buffer material for television was 1.5 mm, which was 1.5 times the thickness of the unvulcanized rubber layer 204. That is, it was found that the expansion ratio was smaller than that in Example 1. Further, when the surface of the foam rubber layer was visually observed under fluorescent lamp illumination, it was confirmed to be a glossy surface. Moreover, the surface and cross section of the foamed rubber layer were observed with an optical microscope. As a result, the surface was a smooth surface, and the presence of a recess due to the foamed cell was not confirmed. In addition, the foam cell was not present near the surface of the foam rubber layer with respect to the thickness direction of the foam rubber layer, and the surface vicinity of the foam rubber layer was covered with a thin film. Moreover, when the hardness of the foamed rubber layer was measured, it was 40 °, which was slightly higher than that of Example 1.

(Comparative Example 3)
As a conventional product, a shock-absorbing material 400 for television having the layer configuration shown in FIG. 10 was produced by the following procedure. Note that the buffer material for the television is obtained by laminating an adhesive layer 402, a resin film 404, an adhesive layer 406, a low hardness silicone rubber layer 408, and a high hardness silicone rubber layer 410 in this order.

-Formation of high hardness silicone layer and low hardness silicone rubber layer-
A liquid silicone rubber extruded to an arbitrary thickness from a die coater is applied to one side of a strip-shaped PET film having both sides of a smooth surface to form an unvulcanized rubber layer. A silicone rubber sheet having a silicone rubber layer formed on one side of the PET film was obtained by heating at 200 ° C. for 30 seconds. The hardness of this silicone rubber layer (high hardness silicone rubber layer 410 before the secondary vulcanization treatment) was 80 °. The liquid silicone rubber used was KE-1930A / B manufactured by Shin-Etsu Chemical Co., Ltd., and the blending ratio (weight ratio) of KE-1930A and KE-1930B was 1: 1.

Next, using the calendar roll machine 100 shown in FIG. 3, a rubber raw material having the following composition is applied to the surface of the silicone rubber sheet on which the silicone rubber layer is provided to form an unvulcanized rubber layer. A sheet was prepared. The rubber raw material used for forming the unvulcanized rubber layer was obtained by kneading the following materials with a mixing roll.
<Rubber raw material composition>
Silicone rubber (Shin-Etsu Chemical Co., Ltd., KE-922U): 100 parts by weight Vulcanizing agent (Shin-Etsu Chemical Co., Ltd., C-8): 2.0 parts by weight Colorant (Shin-Etsu Chemical Co., Ltd.) Manufactured, W2): 4.0 parts by weight

  Next, a silicone rubber layer is obtained by performing a vulcanization treatment at 200 ° C. for 60 minutes on a sheet in which a silicone rubber layer and an unvulcanized rubber layer are laminated in this order on one side of a PET film. The secondary vulcanization treatment and the vulcanization treatment of the unvulcanized rubber layer were performed. Thereby, the sheet | seat on which the high hardness silicone rubber layer 410 and the low hardness silicone rubber layer 408 were laminated | stacked in this order on the single side | surface of PET film was obtained. Further, the PET film was peeled from this sheet to obtain a rubber layer laminate in which a high hardness silicone rubber layer 410 and a low hardness silicone rubber layer 408 were laminated. The hardness of the low hardness silicone rubber layer 408 formed by vulcanizing the unvulcanized rubber layer was 30 °.

-Lamination and cutting-
Print the adhesive using a # 150 mesh plate on the side of the carrier substrate 212 on which the adhesive film 402 and the resin film 404 are laminated on the side where the resin film 404 is provided. did. Then, the surface on which the low hardness silicone rubber layer 408 of the rubber layer laminate was provided was bonded to the surface on which the adhesive was printed, and was bonded by heating at 120 ° C. for 30 minutes. This was cut into a predetermined size. Thereby, the cushioning material 400 for television shown in FIG. 10 provided with the carrier base material 212 on one side was obtained.

  The carrier substrate 212 is the same as that used in Example 1. The adhesive layer 402 is made of an acrylic adhesive material having a thickness of 0.025 mm (manufactured by Panac Corporation), and the resin film 404 is made of a PET film having a thickness of 0.025 mm (manufactured by Toray Industries, Inc., S-10). The adhesive layer 406 has a thickness of 0.025 mm, and the adhesive used to form the adhesive layer 406 is a silicone-based adhesive (manufactured by Shin-Etsu Chemical Co., Ltd., KE-1934A / B). Further, when the surface of the high hardness silicone rubber layer 410 was visually observed under fluorescent lamp illumination, it was confirmed to be a glossy surface. Moreover, when this surface was observed with the optical microscope, it was confirmed that it was a smooth surface.

(Evaluation)
About the sample of each Example and a comparative example, the frictional force (maximum tensile load) of the surface in which the rubber layer of the sample was formed was measured with the measuring method shown in FIG. Moreover, the adhesion feeling when the surface of the sample on which the rubber layer was formed was touched by hand, and the adhesion between the surface of the sample on which the rubber layer was formed and the glass substrate were evaluated. These evaluation results are shown in Table 1 together with the visual evaluation results of the layer configuration of each sample, the hardness of the rubber layer, and the glossiness of the surface on which the rubber layer is formed. As is clear from the results shown in Table 1, the sample of Example 1 has a slipperiness equivalent to that of the conventional product sample of Comparative Example 3, but the number of layers is three, and a simpler layer configuration It was found that

  In addition, the evaluation criteria of friction force shown in Table 1, and the evaluation method and evaluation criteria of adhesion and adhesion to a glass substrate are as follows.

−Friction force−
The evaluation criteria for the frictional force are as follows.
A: The maximum tensile load measured as a frictional force is 3N or less.
B: The maximum tensile load measured as a frictional force is more than 3N and 6N or less.
C: The maximum tensile load measured as a frictional force exceeds 6N.

-Adhesion-
The tackiness was evaluated by the presence / absence or degree of stickiness when the rubber layer surface of each sample was touched by hand. The evaluation criteria are as follows.
A: There is a noticeable stickiness.
B: There is a slight stickiness.
C: There is almost no stickiness.

-Adhesion to glass substrate-
The adhesion to the glass substrate was carried out by the following procedure. First, a sample was placed between two glass substrates each having a smooth surface, and left in a baking furnace at a temperature of 70 ° C. for 168 hours under pressure. The pressure applied to the sample is 90% of the total thickness of the sample placed between the two glass substrates when the total thickness of the sample before the pressure is used as a reference (100%). It was prepared as follows. Subsequently, after removing the sample sandwiched between the two glass substrates from the baking furnace and cooling to room temperature, the ease of peeling when evaluating the interface between the sample rubber layer surface and the glass substrate was evaluated. did. The evaluation criteria are as follows.
A: The rubber layer surface and the glass substrate can be easily peeled off.
B: The surface of the rubber layer and the glass substrate are not easily peeled off, but can be peeled off if slowly peeled off from the end.
C: The rubber layer surface and the glass substrate cannot be peeled off. Or, if you try to peel it off, the sample will be destroyed.

10 Aluminum plate 10T Upper surface 20 Measurement sample (buffer material for TV)
20T Upper surface 30 Weight 32 Plate-like support 32B Lower surface 32T Upper surface 32S End surface 34 Acrylic resin plate 34B Lower surface 40 Wire 50 Tensilon testing machine 60 Pulley 100 Calender roll machine 102 Press roll 104 Rubber raw material supply roll 106 Cover material supply roll 108 Winding Roll 110 Laminating apparatus 112 Heating furnace 120 First laminating roll 122 Second laminating roll 124 First sheet supply roll 126 Second sheet supply roll 128 Conveying roll 200 First sheet 200L Laminating surface 202 Cover base 204 Unvulcanized rubber layer 202R Rough surface 210 Second sheet 210L Laminating surface 212 Carrier base material 214 Adhesive layer 216 Resin film 230 Laminate 240 Foam rubber layer 242 Foam cell 244 (foam rubber layer 240) surface 246 Recessed portion 250 (due to foamed cell 242) Buffer material for TV 300 Television 310 Frame 312 Concave portion 314 Convex portion 314T Top surface 320 (of convex portion 314) Display panel 400 Buffer material for TV 402 Adhesive material layer 404 Resin film 406 Adhesion Material layer 408 Low hardness silicone rubber layer 410 High hardness silicone rubber layer

Claims (7)

A cover base material having at least one surface is a rough surface, and an unvulcanized rubber layer provided in contact with the rough surface of the cover base material, the main component being an unvulcanized silicone rubber and a foaming agent. A first sheet having, and
A second sheet having a carrier substrate, an adhesive layer provided in contact with one side of the carrier substrate, and a resin film provided on the adhesive layer,
The first sheet and the second sheet are bonded by pressing the surface of the first sheet on which the unvulcanized rubber layer is provided and the surface of the second sheet on which the resin film layer is provided. A laminated body forming step of forming a laminated body bonded with the sheet;
At least through a vulcanization / foaming step of heat-treating the laminate and vulcanizing and foaming the unvulcanized rubber layer,
A method for producing a television cushioning material, comprising producing a television cushioning material in which the adhesive material layer, the resin film, and a foamed rubber layer containing silicone rubber as a main component are laminated in this order. In the manufacturing method of the shock absorbing material for televisions of Claim 1,
The first sheet and the second sheet are strip-shaped long sheets,
In the laminate forming step,
The first sheet continuously conveyed in the longitudinal direction of the sheet and the second sheet continuously conveyed in the longitudinal direction of the sheet,
By continuously bonding the first sheet and the second sheet in a state in which the longitudinal directions of the first sheet and the second sheet are matched, a band-shaped laminate is continuously formed,
In the vulcanization / foaming step,
Heat-treating the belt-shaped laminate formed continuously through the laminate formation step while transporting it in the longitudinal direction of the laminate,
A method of manufacturing a shock absorber for television.   A television cushioning material produced by the method for producing a television cushioning material according to claim 1 or 2. A foam rubber layer containing silicone rubber as a main component, a resin film, and an adhesive layer are laminated in this order,
The foam structure in the thickness direction of the foam rubber layer is substantially uniform,
There is a recess due to the foam cell on the surface of the foam rubber layer opposite to the side where the resin film is provided, and
By sequentially executing the measurement procedures shown in the following (1) to (4), the maximum tensile load measured as the frictional force on the surface of the foamed rubber layer opposite to the side on which the resin film is provided is 3 N or less. A cushioning material for television, which is characterized by the above.
<Measurement procedure>
(1) Two TV buffer material samples (width 2 mm, length 140 mm) are placed on an aluminum plate whose upper surface coincides with a horizontal plane, and at a distance of 25 mm parallel to each other so that the adhesive layer is on the lower surface side. Place and paste to fix.
(2) Next, an acrylic resin plate (vertical 70 mm, horizontal 50 mm) is placed on the two television buffer materials fixed on the aluminum plate, and the longitudinal direction of the television buffer material sample and the vertical length of the acrylic resin plate. It arrange | positions so that a direction may correspond, and applies a load of 1.70N with respect to two buffer materials for TV through an acrylic resin board.
(3) Thereafter, the acrylic resin plate is pulled with the pulling speed set to 10 mm / s and the pulling distance amount set to 10 mm with respect to the longitudinal direction of the acrylic resin plate. Then, during this pulling period, the friction force between the upper surface of the two TV cushioning material samples and the lower surface of the acrylic resin plate is used as a change in the load value with an increase in the pulling distance. Measured by RTC-1210A, manufactured by Kuh company.
(4) Here, the load value indicating the maximum value is obtained as the maximum tensile load among the load values corresponding to the increase in the measured tensile distance. The shock-absorbing material for a television set according to claim 4,
A cushioning material for television, wherein a surface of the foamed rubber layer opposite to the side on which the resin film is provided is a matte surface. In the television cushioning material according to any one of claims 3 to 5,
A cushioning material for television, wherein the foamed rubber layer has a hardness of 50 ° or less. A display panel using a glass substrate;
A frame for supporting the display panel;
A television comprising at least the television cushioning material according to any one of claims 3 to 6, which is disposed in a state of being sandwiched between the display panel and the frame.

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