JP2015052174A - Outer-layer processing apparatus for multilayer film material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve sufficient water impermeability in a joint part by simple work when the respective outer edge parts of two multilayer film materials provided in parallel with each other are superposed on and joined to each other.SOLUTION: In an outer-layer processing apparatus for a multilayer film material, an object to be processed is a multilayer film material 2 including: a water impermeable film material layer 3; and a pair of nonwoven fabric layers 4 which are provided so as to sandwich the water impermeable film material layer 3 and are joined to the respective surfaces of the water impermeable film material layer 3. The outer-layer processing apparatus can process at least one nonwoven fabric layer 4 of the two nonwoven fabric layers 4 and 4 in an outer edge part 2a of the multilayer film material 2 by heating and pressing thereof. An outer-layer processing apparatus 1 includes: a heater 17 which is relatively moved in the longitudinal direction of the outer edge part 2a of the multilayer film material 2 and heats the one nonwoven fabric layer 4 during the movement; and a pair of pressure rollers 31 and 32 which are arranged ahead of the relative movement as viewed from the heater 17, and which sandwich and press the outer edge part 2a of the multilayer film material 2 between respective outer peripheral surfaces rotating around respective shaft centers 29 and 30 in directions opposite to each other.

Description

  The present invention provides an outer layer of a multilayer film material for making the nonwoven fabric layer non-permeable by heating and pressure processing when the outer layer at the outer edge of the multilayer film material is composed of a water permeable nonwoven layer. This is a new one related to a processing apparatus.

  For example, in a waste disposal site, a concave waste landfill area that is formed on the ground and opens upward, and a water shielding sheet that is laid entirely on the inner surface of the landfill area are provided. Then, it is possible to input waste into the landfill area until the landfill area is in a landfill completed state, and the waste is disposed in this way.

  In the above case, sewage usually leaches out from the waste, but the sewage is prevented from leaking from the landfill area into the ground by the above-mentioned water shielding sheet, and thus the environment around the waste disposal site is good. To be maintained. In addition, when the landfill area is in a landfill completed state due to the input of waste, in order to prevent water such as rainwater from flowing into this landfill area, there is another impermeable sheet that covers this waste from above. Provided.

  Here, since the water shielding sheet in the waste disposal site generally has a large area, as shown in FIG. 4 (b), the water shielding sheet is conventionally used by field work as follows. It is formed.

  In FIG. 4B, the water shielding sheet 51 has a plurality of multilayer film materials 52 each having a unit area and arranged in parallel. In addition, the multilayer film material 52 is provided so as to sandwich the water-impermeable film material layer 53 and the water-impermeable film material layer 53, and is bonded to each surface of the water-impermeable film material layer 53. Non-woven fabric layers 54, 54. These non-woven fabric layers 54 and 54 have water permeability and air permeability, but on the other hand, by having cushioning properties, they function as a protective material that prevents damage to the non-water-permeable membrane material layer 53 due to some external force.

  When forming the water shielding sheet 51, a plurality of the multilayer film materials 52 are sequentially arranged along the inner surface of the landfill area formed on the ground. Next, the opposing outer edge portions 52a and 52a of the adjacent multilayer film materials 52 and 52 are overlapped and joined to each other by thermal welding or the like. In this way, the water shielding sheets 51 are sequentially formed and laid on the inner surface of the landfill area.

  By the way, as shown in FIG. 4 (b), when the outer edge portions 52a and 52a of the multilayer film materials 52 and 52 are overlapped and joined to each other, the nonwoven fabric layers 54 at the joined portions have water permeability. Left untouched. For this reason, the water W on the water-impervious sheet 51 in the landfill area tends to leak out through the nonwoven fabric layer 54 in the joint and into the ground.

  Therefore, conventionally, as shown in the following Patent Document 1, when the outer edge portions of both multilayer film materials are overlapped and joined to each other, the outer edge portions are compressed to narrow the internal voids or overlap each other. It has been proposed to prevent the water on the water-impervious sheet from leaking out into the ground by inserting an adhesive layer into the voids inside the outer edge portions of both multilayer films.

JP 2011-245745 A

  However, first, when the outer edge portions of both multilayer film materials are overlapped and joined as in the prior art disclosed in the above publication, the outer edge portions are compressed to narrow the internal gaps. A hot roll press in which a heater for heating these outer edge portions and a roller for pressurization are integrated is used. For this reason, there exists a possibility that optimal processing may be difficult to obtain due to the configuration in which the heater and the roller are associated with each other.

  The hot roll press is provided as a stationary type in a factory. For this reason, the processing on the outer edge of the multilayer film material is extremely difficult at the waste disposal site where field work is required. In addition, in the case of the above-described stationary hot roll press, it is not easy to change its own position and orientation, so the multilayer film material that is manufactured by being wound substantially in the roll shape, in the width direction. Only the end portion can be processed. For example, when the multilayer film material is arbitrarily cut on site, it is impossible to process the end portion in the length direction.

  Second, as in the prior art disclosed in the above publication, when the outer edge portions of both multilayer film materials are overlapped and joined together, an adhesive layer is inserted into the voids inside these outer edge portions. In some cases, such an adhesive layer needs to be prepared separately, and the work may become complicated.

  The present invention has been made paying attention to the above-described circumstances, and the object of the present invention is to connect the outer edge portions of both multilayer film materials arranged in parallel to each other and join them together. In other words, the outer layer processing of the multilayer film material, which is a pre-process for bonding, can be achieved by a simple operation even at a construction site or the like.

The invention of claim 1 is a non-water-permeable membrane material layer 3 and a pair of non-woven fabric layers that are provided so as to sandwich the water-impermeable membrane material layer 3 and are bonded to the respective surfaces of the water-impermeable membrane material layer 3. The multilayer film material 2 having 4 is processed, and at least one of the two nonwoven fabric layers 4 and 4 at the outer edge 2a of the multilayer film material 2 is heated and pressed. An outer layer processing apparatus for a multilayer film material,
A relative movement in the longitudinal direction of the outer edge 2a of the multilayer film material 2 is performed, and a heater 17 that heats the one nonwoven fabric layer 4 during the movement and a front of the relative movement as viewed from the heater 17 are arranged. And a pair of pressure rollers 31, 32 for pressing the outer edge portion 2a of the multilayer film material 2 between outer peripheral surfaces rotating in opposite directions around the shaft centers 29, 30. This is an outer layer processing apparatus for a multilayer film material.

  The invention of claim 2 is characterized in that an air cooling region 37 is provided in which the outer edge portion 2a of the multilayer film material 2 is brought into contact with the outside air between the heater 17 and the pair of pressure rollers 31, 32 to cool the air. The apparatus for processing an outer layer of a multilayer film material according to claim 1.

  According to the third aspect of the present invention, when viewed from the line of sight along the axial centers 29 and 30 of the pressure rollers 31 and 32 (FIG. 1), the outer peripheral surfaces of the pair of pressure rollers 31 and 32 face each other. The heater 17 is disposed on a virtual center line 38 that passes through a central portion between the opposing surfaces, and the heater 17 is formed to have a substantially symmetrical shape with respect to the virtual center line 38 as a reference. An apparatus for processing an outer layer of a multilayer film material according to claim 1 or 2.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 includes a non-water-permeable membrane material layer and a pair of non-woven fabric layers that are provided so as to sandwich the non-water-permeable membrane material layer and are respectively bonded to each surface of the non-water-permeable membrane material layer. An outer layer processing apparatus for a multilayer film material in which the processed multilayer film material is an object to be processed, and at least one of the two nonwoven fabric layers at the outer edge of the multilayer film material can be heated and pressed. There,
A relative movement in the longitudinal direction of the outer edge portion of the multilayer film material, a heater for heating the one nonwoven fabric layer during the movement, and a front of the relative movement as viewed from the heater are arranged around each axis. And a pair of pressure rollers for pressing the outer edge portion of the multilayer film material between the outer peripheral surfaces rotating in opposite directions, and the following effects are produced.

  That is, according to the above invention, the non-woven fabric layer at the outer edge of the multilayer film material that has been heated and pressed is pressed with the fibers softened by heating, so the voids inside the non-woven fabric layer are effective. The narrowed voids are retained without being restored due to the hardening of the fibers accompanying the subsequent natural cooling. Therefore, sufficient non-water permeability is obtained for this nonwoven fabric layer.

  As a result, for example, when trying to obtain a water-impervious sheet having a large area, the non-woven fabric layers at the outer edge portions of both multilayer films arranged side by side are overlapped and bonded to each other. Non-water permeability is obtained. For this reason, it is more reliably prevented that the water on the water shielding sheet leaks downward.

  In addition, as described above, in the case where it is intended to obtain a sufficient water-imperviousness at the joint portion between the nonwoven fabric layers at each outer edge portion of both multilayer film materials arranged side by side, It is not necessary to prepare a separate pressure-sensitive adhesive layer. Therefore, it is possible to achieve a sufficient water-imperviousness for the joint portion by a simple operation.

  Moreover, according to the present invention, when the nonwoven fabric layer at the outer edge portion of the multilayer film material is heated and pressed, a heater for heating and a pair of pressure rollers for pressing are separately provided. Yes.

  For this reason, first, heating and pressurization of the non-woven fabric layer at the outer edge of the multilayer film material can be made appropriate as compared with the case where the heater and the pressure rollers are integrally formed. Therefore, optimum processing can be obtained.

  Second, it is possible to improve the degree of freedom of the arrangement by avoiding the heater and the pressure rollers from interfering with each other. Therefore, for example, by arranging the heater and each pressure roller so that the outer layer processing apparatus can be easily used in the field, the degree of freedom in using the outer layer processing apparatus can be improved. it can.

  According to a second aspect of the present invention, there is provided an air cooling region in which the outer edge portion of the multilayer film material is brought into contact with the outside air to cool the air between the heater and the pair of pressure rollers.

  For this reason, when the nonwoven fabric layer at the outer edge of the multilayer film material is heated by a heater, the surface layer of the nonwoven fabric layer, which tends to be particularly high in temperature, is softened and condensed. The density of the surface layer of the layer is increased. And since the said nonwoven fabric layer is cooled in the said air cooling area immediately after that, the surface layer of this nonwoven fabric layer is hardened rapidly, and a highly rigid resin film is formed.

  Therefore, after that, when the outer edge portion of the multilayer film material is sandwiched between the pair of pressure rollers and pressed, the applied pressure is directed toward the inside of the non-woven fabric layer through the highly rigid resin film and more widely. As a result, the voids are more effectively narrowed, and the non-woven fabric layer is more sufficiently water-impermeable.

  According to a third aspect of the present invention, when viewed from the line of sight along the axis of the pressure roller, a virtual center passing through a central portion between the opposing surfaces of the pair of pressure rollers, the outer peripheral surfaces of the pair of pressure rollers. The heater is arranged on a line, and the heater is formed to have a substantially symmetrical shape with respect to the virtual center line.

  For this reason, when trying to process the nonwoven fabric layer at the outer edge of the multilayer film material and heating the nonwoven fabric layer at the outer edge of the multilayer film material with the heater, both outer surfaces of the heater based on the virtual center line At least one of the sides can be selectively used.

  Therefore, when only one of the two outer surface sides of the heater can be used, there is a possibility that the work of turning the multilayer film material may be necessary during the processing, and the work may be complicated. Compared with this, according to the said invention, the processing operation of the nonwoven fabric layer in the outer edge part of the said multilayer film material can be performed easily.

It is a whole side view. It is a whole top view. FIG. 3 is a partial enlarged cross-sectional view taken along line III-III in FIG. 1. (A) is explanatory drawing when each outer edge part of both multilayer film materials is piled up and joined, (b) is a figure explaining a prior art, and is a figure equivalent to Fig.4 (a). It is.

  Regarding the outer layer processing apparatus of the multilayer film material of the present invention, when the outer edge portions of both multilayer film materials arranged side by side are overlapped and bonded together, sufficient water permeability cannot be obtained at the bonded portion, In order to achieve the object of achieving this by a simple operation, the mode for carrying out the present invention is as follows.

  That is, the outer layer processing apparatus for a multilayer film material is provided with a non-water-permeable film material layer and a pair of nonwoven fabrics provided so as to sandwich the non-water-permeable film material layer and bonded to each surface of the non-water-permeable film material layer. A multilayer film material having a layer is a processing object. The outer layer processing apparatus can heat and pressurize at least one of the two nonwoven fabric layers at the outer edge of the multilayer film material. The outer layer processing apparatus is relatively moved in the longitudinal direction of the outer edge portion of the multilayer film material, and a heater for heating the one nonwoven fabric layer during the movement, and the front of the relative movement as viewed from the heater. And a pair of pressure rollers that press the outer peripheral portion of the multilayer film material between outer peripheral surfaces that rotate in opposite directions around each axis.

  In order to describe the present invention in more detail, an embodiment thereof will be described with reference to FIGS.

  1-3, the code | symbol 1 in a figure is the outer-layer processing apparatus of a multilayer film material. For convenience of explanation, the direction of the arrow Fr in the figure is the front, and the left and right described below refer to the horizontal direction toward the front.

  The object to be processed by the outer layer processing apparatus 1 is a multilayer film material 2, and the multilayer film material 2 is provided so as to sandwich the water impermeable film material layer 3 and the water impermeable film material layer 3. It has a pair of nonwoven fabric layers 4 and 4 respectively joined to each surface of the water-permeable membrane material layer 3, and these nonwoven fabric layers 4 and 4 correspond to the outer layers of the multilayer membrane material 2.

The multilayer film material 2 has a basis weight of 600 g / m ² , a width dimension of 2 m, a length of 10 m, and a thickness of 4.5 mm as approximate numerical values.

The non-water-permeable membrane material layer 3 is a non-water-permeable film that prevents the passage of rainwater and sewage. However, when the multilayer membrane material 2 is used in a waste disposal site, various gases generated from waste are generated. It also has air permeability that allows water vapor to pass therethrough. The material of the water-impermeable membrane material layer 3 is a polyolefin resin such as polyethylene or polypropylene, polytetrafluoroethylene, or polyvinylidene fluoride. The thickness is about 0.1 mm. Further, the moisture permeability is preferably 1000 to 10000 g / m ² · 24 hr in order to exhibit both non-water permeability and air permeability.

  While the nonwoven fabric layer 4 has water permeability and air permeability, it has excellent cushioning properties, so that it does not impair the water permeability and air permeability of the water impermeable membrane material layer 3 and is caused by some external force. It functions as a protective material that prevents damage to the non-water-permeable membrane material layer 3.

The fibers of the nonwoven fabric layer 4 may be continuous fibers or short fibers of 30 to 150 mm. Moreover, it is preferable that the fineness is 2 to 10 dtex. Moreover, in order to protect this water-impermeable membrane material layer 3 more reliably from external force, without impeding the water-imperviousness and air permeability of the said water-impermeable membrane material layer 3, , is at least one, preferably basis weight is 100 to 1000 g / ^{m 2,} more preferably 200-500 g / ^{m 2,} it is preferable that a thickness of 1 to 10 mm, 1 More preferably, it is 5-6 mm.

  The material of the fibers of the non-woven fabric layer 4 is thermoplastic, and is a polyester such as polyethylene terephthalate or polybutylene terephthalate, a polyolefin such as polyethylene or polypropylene, or a polymer such as polyamide such as nylon 6 or nylon 66.

  The fiber of the said nonwoven fabric layer 4 may be comprised by 1 type of fiber, and may be comprised by the fiber from which a single phase fiber, a cross-sectional form, etc. differ. Moreover, the fiber of the nonwoven fabric layer 4 may be a composite fiber composed of an outer cylinder part (sheath) and an interior part (core part) provided in the outer cylinder part. In this case, the outer cylinder part May be polyethylene (melting point: 125 ° C.), and the interior portion may be polyester such as polyethylene terephthalate (melting point: 260 ° C.).

  For joining the nonwoven fabric layer 4 to each surface of the non-water-permeable membrane material layer 3, a joining method using a heat laminate that melts by heat until the non-water-permeable membrane material layer 3 is thermally melted may be adopted. Alternatively, an adhesion method using an adhesive such as a hot-melt resin may be employed as long as the air permeability of the non-water-permeable membrane material layer 3 is not impaired.

  The non-woven fabric layer 4 may be formed by accumulating a plurality of (3) spunbonded non-woven fabrics composed of a composite fiber composed of the outer tube portion and the interior portion, and by needle punching. Well, according to this needle punching process, the nonwoven fabric layer 4 having particularly excellent cushioning properties can be obtained.

  The outer layer processing apparatus 1 is capable of heating and pressurizing at least one of the two nonwoven fabric layers 4 and 4 in the outer edge portion 2a in the surface direction of the multilayer film material 2. is there.

  The outer layer processing apparatus 1 includes a carriage 9 installed on the upper surface of a stationary member 8 exemplified by a horizontal floor so as to be movable back and forth. The carriage 9 includes a chassis 10 disposed above the upper surface of the stationary member 8, and a pair of left and right wheels attached to the chassis 10 and supporting the chassis 10 on the upper surface of the stationary member 8. 11 and 12, and can be moved forward and backwardly moved A on the stationary member 8.

  A support base 15 projects upward from the rear side of the chassis 10, and a heater 17 is supported by a bracket 16 projecting forward from the support base 15. The heater 17 is a heating plate and is disposed above the front portion of the chassis 10 of the carriage 9. The heater 17 may be a hot air type.

  A pivot arm 21 is provided which extends in the front-rear direction and whose rear end is pivotally supported by the pivot base 20 on the support base 15 so that its front side can be turned upward and downward. A roller support base 23 is supported by a support 22 so as to be vertically movable at a midway portion in the longitudinal direction of the rotating arm 21. A pair of front and rear pressing rollers 25, 25 each having a shaft center 24 extending in the left-right direction and extending in parallel with each other are supported on the roller support 23 so as to be freely rotatable around each shaft center 24. The roller support 23 and the pair of pressing rollers 25 are arranged near the upper side of the heater 17. In addition, a spring 26 is provided for urging the pressing roller 25 together with the roller support 23 to move to the heater 17 side.

  A pair of upper and lower pressure rollers 31 and 32 are provided in the vicinity of the front side of the heater 17 so that the shaft centers 29 and 30 extend to the left and right and extend in parallel to each other. Of these upper and lower pressure rollers 31, 32, the upper pressure roller 31 is supported on the rotating end portion of the rotating arm 21 so as to be freely rotatable around its axis 29. Further, the lower pressure roller 32 is supported by a bracket 33 protruding from the front end portion of the chassis 10 of the carriage 9 so as to be freely rotatable around its axis 30. The upper pressure roller 31 can be brought into pressure contact with the upper surface of the lower pressure roller 32 by the weight of the rotating arm 21 and the pressure roller 32. The lower pressure roller 32 can be driven mainly by a driving device 34 such as an electric motor so that the upper surface of the lower pressure roller 32 is rotationally driven D forward.

  The heater 17 relatively moves the lower nonwoven fabric layer 4 as the one nonwoven fabric layer 4 in the outer edge portion 2a of the multilayer film material 2 in the longitudinal direction (front-rear direction) of the outer edge portion 2a of the multilayer film material 2. The one nonwoven fabric layer 4 can be heated during this movement. Specifically, in the relative movement, the heater 17 may be moved rearward A together with the cart 9 while the outer edge 2a of the multilayer film material 2 is stationary. In this state, the outer edge 2a of the multilayer film material 2 may be moved forward.

  The upper and lower pressure rollers 31 and 32 sandwich the outer edge portion 2a of the multilayer film material 2 between the outer peripheral surfaces that rotate in opposite directions around the shaft centers 29 and 30 by the driving of the driving device 34. The multilayer film material 2 is moved forward by applying pressure.

  The width dimension by which the outer edge 2a of the multilayer film material 2 is heated and pressurized is about 100 mm. The temperature of the heater 17 is 130 to 210 ° C. from the viewpoint of preventing damage to the water impermeable membrane material layer 3, and the moving speed of the outer edge 2a of the multilayer membrane material 2 is 1 to 30 m / min. It is preferable. The compression of the outer edge portion 2a of the multilayer film material 2 by the upper and lower pressure rollers 31 and 32 is preferably performed until it becomes 50% or less of the original thickness.

  Between the heater 17 and the pair of upper and lower pressure rollers 31, 32, an air cooling region 37 is provided in which the outer edge portion 2a of the multilayer film material 2 is brought into contact with the outside air to cool the air. Further, when viewed from the line of sight along the axial centers 29 and 30 of the pressure rollers 31 and 32 (FIG. 1), between the opposed surfaces of the upper and lower pressure rollers 31 and 32 facing each other. The heater 17 is disposed on a virtual center line 38 that passes through the center of the heater, and the heater 17 is formed to have a substantially symmetrical shape vertically with respect to the virtual center line 38.

  On the lower side of the heater 17, the members 22 to 26 of the support 22, the roller support base 23, the shaft center 24, the pressing roller 25, and the spring 26 provided on the upper side of the heater 17 are connected to the virtual center line. Members 22 ′ to 26 ′ having the same configuration as those upside down with respect to 38 are provided.

  When the nonwoven fabric layer 4 at the outer edge 2a of the multilayer film material 2 is heated and pressurized by the outer layer processing apparatus 1, first, the multilayer film material 2 is relatively moved from the rear side of the outer layer processing apparatus 1. It is moved forward, and the outer edge 2a of the multilayer film material 2 is sandwiched between the upper surface of the heater 17 and the front and rear pressing rollers 25, 25 and between the upper and lower pressure rollers 31, 32, The drive device 34 is driven.

  Then, the outer edge 2a of the multilayer film material 2 is relatively moved forward while being sandwiched between the upper and lower pressure rollers 31 and 32. At this time, the lower nonwoven fabric layer 4 which is one nonwoven fabric layer 4 among the upper and lower nonwoven fabric layers 4 and 4 in the outer edge portion 2 a of the multilayer film material 2 is slidably contacting the upper surface of the heater 17. It is moved and pressed against the upper surface of the heater 17 by the urging force of the spring 26. For this reason, the lower nonwoven fabric layer 4 is effectively heated by the heater 17. Thereafter, the outer edge portion 2a of the multilayer film material 2 including the lower nonwoven fabric layer 4 thus heated is sandwiched and pressed between the upper and lower pressure rollers 31 and 32.

  In FIG. 3, the satin pattern indicates the heated portion of the one nonwoven fabric layer 4 in the outer edge portion 2 a of the multilayer film material 2.

  On the other hand, when the outer edge portion 2a of the multilayer film material 2 is heated and pressed using the members 22 'to 26' provided on the lower side of the heater 17, the outer edge of the multilayer film material 2 is obtained. The upper nonwoven fabric layer 4 in the portion 2 a is heated by the heater 17, and then the outer edge portion 2 a of the multilayer film material 2 including the heated upper nonwoven fabric layer 4 is sandwiched between the upper and lower pressure rollers 31 and 32. Pressurized. In addition, the outer edge part 2a of the multilayered film material 2 of 2 sheets can also be heated and pressurized simultaneously using each member of the upper side of the said heater 17, and a lower side.

  And since the nonwoven fabric layer 4 in the outer edge part 2a of the multilayer film material 2 heated and pressurized as mentioned above is pressed in a state where the fibers are softened by heating, the inside of the nonwoven fabric layer 4 The voids are effectively narrowed, and the narrowed voids are retained without being restored by the curing of the fibers accompanying the subsequent natural cooling. Therefore, sufficient non-water permeability is obtained for the nonwoven fabric layer 4.

  As a result, in FIG. 4A, for example, both multilayer film materials 2 and 2 arranged in parallel with each other in an attempt to obtain a water shielding sheet 41 laid on the inner surface of the landfill area of the waste disposal site and having a large area. When the non-woven fabric layers 4 and 4 are overlapped at the outer edge portions 2a and these 4 and 4 are bonded by heat welding with an heater 42 or 42 or an adhesive, sufficient water permeability is obtained at the bonded portion. It is done. For this reason, it is prevented more reliably that the sewage on the said water-impervious sheet | seat 41 leaks in the ground below that, and the environment around a waste disposal site is maintained favorably.

  In addition, as described above, when trying to obtain sufficient water permeability at the joint between the nonwoven fabric layers 4 and 4 at the outer edge portions 2a of the multilayer film materials 2 and 2 arranged side by side, Thus, it is not necessary to prepare a separate adhesive layer as in the conventional technique, and accordingly, it is possible to achieve sufficient water permeability at the joining portion by a simple operation.

  And according to the said structure, in the case of heating and pressurizing the nonwoven fabric layer 4 in the outer edge part 2a of the multilayer film material 2, the heater 17 for heating and a pair of pressurization rollers 31 and 32 for pressurizing are applied. Are provided separately.

  For this reason, the heating and pressurization of the non-woven fabric layer 4 at the outer edge 2a of the multilayer film material 2 are compared with the case where the heater 17 and the pressure rollers 31 and 32 are integrally formed. Each of them can be made appropriate, so that an optimum processing can be obtained.

  Second, the heater 17 and the pressure rollers 31 and 32 can be prevented from interfering with each other, and the degree of freedom of arrangement can be improved. Therefore, for example, the outer layer processing apparatus 1 can be freely used by arranging the heater 17 and the pressure rollers 31 and 32 so that the outer layer processing apparatus 1 can be easily used in the field. The degree can be improved.

  Further, as described above, the air cooling region 37 is provided in which the outer edge portion 2a of the multilayer film material 2 is brought into contact with outside air to cool the air between the heater 17 and the pair of pressure rollers 31, 32.

  For this reason, when the nonwoven fabric layer 4 in the outer edge part 2a of the said multilayer film material 2 is heated with the heater 17, the surface layer of the said nonwoven fabric layer 4 which tends to become especially high temperature is made softer and condensed. At the same time, since an external force is applied by sliding contact with the heater 17, the density of the surface layer of the nonwoven fabric layer 4 is increased. And immediately after that, since the said nonwoven fabric layer 4 is cooled in the said air cooling area 37, the surface layer of this nonwoven fabric layer 4 is hardened rapidly, and a highly rigid resin film is formed.

  Therefore, after that, when the outer edge 2a of the multilayer film material 2 is sandwiched between the pair of pressure rollers 31 and 32 and pressed, the applied pressure is applied to the nonwoven fabric layer 4 through the highly rigid resin film. The gap is more effectively narrowed toward the inside and transmitted more widely, and the non-woven fabric layer 4 is further sufficiently water-impermeable.

  Further, as described above, when viewed from the line of sight along the axial centers 29 and 30 of the pressure rollers 31 and 32 (FIG. 1), the outer peripheral surfaces of the pair of pressure rollers 31 and 32 face each other. The heater 17 is disposed on a virtual center line 38 passing through the central portion between the two opposing surfaces, and the heater 17 is formed to have a substantially symmetrical shape with respect to the virtual center line 38 as a reference.

  For this reason, when the nonwoven fabric layer 4 in the outer edge portion 2a of the multilayer film material 2 is heated by the heater 17 in order to process the nonwoven fabric layer 4 in the outer edge portion 2a of the multilayer film material 2, the virtual center line 38 is At least one of the outer surface sides of the heater 17 as a reference can be selectively used.

  Therefore, when only one of the two outer surfaces of the heater 17 can be used, there is a possibility that the work of turning the multilayer film material 2 over may be necessary during the processing, and the work may be complicated. Compared with this, according to the said structure, the process of the nonwoven fabric layer 4 in the outer edge part 2a of the said multilayer film material 2 can be done easily.

DESCRIPTION OF SYMBOLS 1 Outer layer processing apparatus 2 Multilayer membrane material 2a Outer edge part 3 Non-water-permeable membrane material layer 4 Nonwoven fabric layer 8 Stationary side member 9 Carriage 15 Support stand 16 Bracket 17 Heater 20 Pivoting shaft 21 Rotating arm 22 Support tool 23 Roller support stand 24 Shaft Center 25 Pressing Roller 26 Spring 29 Shaft Center 30 Shaft Center 31 Pressing Roller 32 Pressing Roller 33 Bracket 34 Drive Device 37 Air Cooling Area 38 Virtual Center Line 41 Water Impermeable Sheet A Backward Movement B Upward Rotation C Downward Rotation D Rotation Drive

Claims (3)

A multilayer membrane material having a non-water-permeable membrane material layer and a pair of nonwoven fabric layers provided so as to sandwich the non-water-permeable membrane material layer and bonded to each surface of the non-water-permeable membrane material layer A multilayer film material outer layer processing apparatus capable of heating and pressurizing at least one of the nonwoven fabric layers at the outer edge of the multilayer film material,
A relative movement in the longitudinal direction of the outer edge portion of the multilayer film material, a heater for heating the one nonwoven fabric layer during the movement, and a front of the relative movement as viewed from the heater are arranged around each axis. And a pair of pressure rollers for pressing the outer edge portion of the multilayer film material between the outer peripheral surfaces rotating in opposite directions to each other.   2. The multilayer film material outer layer processing apparatus according to claim 1, wherein an air cooling region is provided in which the outer edge portion of the multilayer film material is brought into contact with outside air to be air cooled between the heater and the pair of pressure rollers. .   The heater is disposed on a virtual center line passing through a central portion between both opposed surfaces of each of the outer peripheral surfaces of the pair of pressure rollers as viewed from the line of sight along the axis of the pressure roller. 3. The apparatus for processing an outer layer of a multilayer film material according to claim 1, wherein the heater is formed to have a substantially symmetrical shape with respect to the virtual center line.

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