WO2022113994A1 - シートの製造方法および加工装置 - Google Patents
シートの製造方法および加工装置 Download PDFInfo
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- WO2022113994A1 WO2022113994A1 PCT/JP2021/042960 JP2021042960W WO2022113994A1 WO 2022113994 A1 WO2022113994 A1 WO 2022113994A1 JP 2021042960 W JP2021042960 W JP 2021042960W WO 2022113994 A1 WO2022113994 A1 WO 2022113994A1
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- Prior art keywords
- processing
- sheet
- rolls
- base sheet
- roll
- Prior art date
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- 238000012545 processing Methods 0.000 title claims abstract description 255
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims abstract description 85
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000003754 machining Methods 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 27
- 230000007246 mechanism Effects 0.000 claims description 14
- 238000012546 transfer Methods 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000001788 irregular Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 238000002788 crimping Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000007757 hot melt coating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
- D06C3/06—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by rotary disc, roller, or like apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/18—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/192—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web motor-controlled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/512—Changing form of handled material
- B65H2301/5124—Stretching; Tentering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/14—Roller pairs
Definitions
- the present invention relates to a sheet manufacturing method and a processing apparatus, and more particularly to a technique for manufacturing an elastic sheet.
- FIG. 6 is a schematic view of the sheet processing apparatus 101.
- teeth 120 and 130 that mesh with each other are provided on the peripheral surface portion of the pair of rolls 102 and 103, and the tension applying means 105 and front and rear of the pair of rolls 102 and 103 are provided. It is equipped with 106.
- the pair of rolls 102 and 103 are rotationally driven in the directions of arrows 202 and 203, the teeth 120 and 130 of the rolls 102 and 103 mesh with each other with a gap, and the gap between the teeth 120 and 130 mesh with each other.
- the base sheet 110 is supplied to the base sheet 110, and the base sheet 110 is stretched in the flow direction to impart elasticity.
- the tension applying means 105 and 106 apply tension to the substrate sheet 110 before and after processing by the rolls 102 and 103.
- the tension applying means 105 is arranged on the transfer path between the set of nip rolls 151 and 152 arranged upstream of the pair of rolls 102 and 103 and the nip rolls 151 and 152 and the rolls 102 and 103. It includes a shown tension detector and a control unit (not shown) that controls the peripheral speed of the nip rolls 151 and 152 based on the detection output of the tension detector.
- the tension applying means 106 is a set of nip rolls 161, 162 arranged on the downstream side of the pair of rolls 102, 103, and a non-pulling means arranged on the transport path between the nip rolls 161, 162 and the rolls 102, 103. It includes a shown tension detector and a control unit (not shown) that controls the peripheral speed of the nip rolls 161, 162 based on the detection output of the tension detector.
- the pre-processing tension applied to the base sheet 110 by the nip rolls 151 and 152 of the tension applying means 105 is 10% to 90%, preferably 20% to 80% of the breaking load in the flow direction of the base sheet 110 before processing. do.
- the post-processing tension applied to the base sheet 110 by the nip rolls 161, 162 of the tension applying means 106 is 5% to 80%, preferably 10% to 70% of the breaking load in the flow direction of the base sheet 110 before processing. % (See, for example, Patent Document 1).
- an object to be solved by the present invention is to provide a sheet manufacturing method and a processing apparatus capable of imparting greater elasticity to a base sheet.
- the present invention provides a method for manufacturing a sheet configured as follows in order to solve the above problems.
- the method for manufacturing the sheet is as follows: (i) a transfer step for transporting the base sheet, and (ii) a pair of processing rolls arranged so as to sandwich a transport path through which the base sheet is transported.
- the transfer step the base material sheet is in contact with and along the outer peripheral surface of one of the processing rolls immediately before passing between the processing rolls, and is conveyed to the outer peripheral surface of the one processing roll.
- the base sheet is transported so that the tension acting on the base sheet immediately before reaching is less than 10% of the breaking load in the transport direction of the base sheet before processing.
- the tension acting on the base sheet in the conveying direction is the tension between the base sheet and the outer peripheral surface of one processing roll.
- the size can be gradually reduced toward the upstream side in the transport direction from the meshing portion of the uneven portion between the processing rolls, and immediately before the base sheet reaches the outer peripheral surface of one processing roll.
- the tension in the transport direction acting on the base sheet can be reduced.
- the friction between the base sheet and the outer peripheral surface of one of the processing rolls can be utilized to suppress the shrinkage of the base sheet in the width direction orthogonal to the transport direction. Therefore, it is possible to impart greater elasticity to the base material sheet as compared with the case where the mating portion is immediately stretched while tension is applied in the transport direction.
- the processing in the transport direction of the base sheet is performed. It is possible to suppress shrinkage in the width direction of the base sheet and impart even greater elasticity to the base sheet than when the pretension is 10% or more of the breaking load in the transport direction of the base sheet before processing. Can be done.
- the method for producing the sheet is such that the temperature of the outer peripheral surface of the one processing roll is 10 ° C. or higher and 60 ° C. or lower, preferably 30 ° C. or higher and 60 ° C. or lower.
- a heating step for heating one of the processing rolls is further provided.
- the base sheet can be processed without breaking or being damaged.
- the base material sheet is placed along the outer peripheral surface of the one processing roll within a range of 180 ° or more and 270 ° or less about the rotation center line of the one processing roll. Transport.
- the base sheet is transported longer along the outer peripheral surface of one processing roll, and when the base sheet is heated by one processing roll, the base sheet can be sufficiently heated and has greater elasticity. Can be applied to the base sheet.
- the machining roll is supported so that at least one of the machining rolls can be moved to change the distance between the machining rolls.
- the amount of meshing of the uneven portion of the processing roll is fixed or suppressed within a predetermined range.
- the present invention provides a sheet processing apparatus configured as follows in order to solve the above problems.
- the sheet processing apparatus includes a pair of processing rolls that are arranged so as to sandwich a transfer path through which the base sheet is conveyed, and that the uneven portions formed along the outer peripheral surfaces of the sheet are rotated so as to form a gap between them and mesh with each other. ..
- the sheet processing apparatus is configured so that the base sheet is in contact with and conveyed along the outer peripheral surface of one of the processing rolls immediately before the base sheet passes between the processing rolls, and (a) the base sheet is conveyed.
- a drive roll that is arranged along the transport path until it reaches the one processing roll and is rotationally driven so as to feed out the base sheet, and (b) immediately before the base sheet reaches the one processing roll.
- One of the drive roll and the processing roll so that the tension in the transport direction acting on the base sheet is less than 10% of the breaking load in the transport direction of the base sheet before processing. Further, a tension control device for controlling both rotations is provided.
- the tension acting on the base sheet in the conveying direction is the tension between the base sheet and the outer peripheral surface of one processing roll.
- the size can be gradually reduced toward the upstream side in the transport direction from the meshing portion of the uneven portion between the processing rolls, and immediately before the base sheet reaches the outer peripheral surface of one processing roll.
- the tension in the transport direction acting on the base sheet can be reduced.
- the friction between the base sheet and the outer peripheral surface of one of the processing rolls can be utilized to suppress the shrinkage of the base sheet in the width direction orthogonal to the transport direction. Therefore, it is possible to impart greater elasticity to the base material sheet as compared with the case where the mating portion is immediately stretched while tension is applied in the transport direction.
- the tension in the transport direction of the base sheet is less than 10% of the breaking load in the transport direction of the base sheet before machining, the tension in the transport direction of the base sheet is before machining. It is possible to suppress shrinkage in the width direction of the base sheet and impart even greater elasticity to the base sheet than when the tension is 10% or more of the breaking load in the transport direction of the base sheet before processing. can.
- the sheet processing apparatus is such that the temperature of the outer peripheral surface of the one processing roll is 10 ° C. or higher and 60 ° C. or lower, preferably 30 ° C. or higher and 60 ° C. or lower.
- a heater for heating one of the processing rolls is further provided.
- the base sheet 2 can be processed without breaking or being damaged.
- the base sheet is transported longer along the outer peripheral surface of one processing roll, and when the base sheet is heated by one processing roll, the base sheet can be sufficiently heated and has greater elasticity. Can be applied to the base sheet.
- the sheet processing apparatus is (c) a processing roll support mechanism that supports the processing roll so that the distance between the processing rolls can be changed, and (d) a processing roll movement that moves at least one of the processing rolls. Further, the apparatus is further provided with (e) a separation preventing means for fixing or suppressing the amount of meshing of the uneven portion of the processing roll within a predetermined range.
- the space between the processing rolls can be widened, it becomes easy to prepare the base sheet by passing it between the processing rolls before processing.
- the separation preventing means the amount of meshing of the uneven portion of the processing roll during the stretching process is fixed or suppressed within a certain range, so that the variation in the stretching amount of the base sheet can be suppressed.
- FIG. 1 is a schematic view of a sheet processing apparatus.
- FIG. 2 is a block diagram of a sheet processing apparatus.
- FIG. 3 is an enlarged schematic view of a main part of the sheet processing apparatus.
- FIG. 4 is a schematic diagram of a main part of the sheet processing apparatus.
- FIG. 5 is a structural principle diagram of the lock mechanism.
- FIG. 6 is an explanatory diagram of the sheet manufacturing process.
- Example 1 The sheet processing apparatus 10 and the sheet manufacturing method of the first embodiment will be described with reference to FIGS. 1 to 3.
- FIG. 1 is a schematic diagram showing a schematic configuration of the sheet processing apparatus 10.
- the sheet processing apparatus 10 has a first drive roll 16 and a first drive roll 16 in the order from the upstream side to the downstream side in the transport direction of the base sheet 2 along the transport path 3 in which the base sheet 2 is transported.
- Guide rolls 31, 32, pair of machining rolls 12, 14, guide rolls 33, 34, second drive roll 18, guide rolls 35, 36, crimp roll 20, nip roll 22, and guide roll 37 are arranged.
- the first drive roll 16 is rotationally driven in the direction indicated by the arrow 16r so as to feed out the base sheet 2, and the base sheet 2 in contact with the outer peripheral surface 16s of the first drive roll 16 is brought into contact with the first drive roll 16. Transport at the same speed as the peripheral speed of.
- the base sheet 2 is conveyed in the direction indicated by the arrow 2x, passes through the guide rolls 31 and 32, and passes between the pair of processing rolls 12 and 14.
- the peripheral speed of the first drive roll 16 is made higher than the peripheral speed of the processing rolls 12 and 14.
- the peripheral speed of the first drive roll 16 is 1.5 times the peripheral speed of the processing rolls 12 and 14.
- the pair of processing rolls 12 and 14 are arranged so as to sandwich the transport path 3.
- One processing roll 12 has a plurality of spur gear-shaped or straight tooth-shaped teeth 13 along its outer peripheral surface 12s.
- the teeth 13 are arranged radially around the rotation center line 12x of the processing roll 12 and at a predetermined pitch in the circumferential direction, and each tooth 13 extends parallel to the rotation center line 12x of the processing roll 12.
- the other processing roll 14 has a plurality of spur gear-shaped or straight tooth-shaped teeth 15 along its outer peripheral surface 14s.
- the teeth 15 are arranged radially around the rotation center line 14x of the processing roll 14 and at a predetermined pitch in the circumferential direction, and each tooth 15 extends parallel to the rotation center line 14x of the processing roll 14.
- the pair of processing rolls 12 and 14 are rotationally driven in synchronization with each other in the directions indicated by the arrows 12r and 14r so that the teeth 13 and 15 mesh with each other with a gap.
- drive gears (not shown) that mesh with each other are fixed to the shaft ends of rotation shafts (not shown) of the machining rolls 12 and 14, and the rotation of the third motor 12 m (see FIG. 2) is transmitted to the drive gears.
- the teeth 13 and 15 function as uneven portions that mesh with each other by providing a gap.
- the base material sheet 2 is stretched when the teeth 13 and 15 of the processing rolls 12 and 14 pass through the meshing portion 12b that meshes with each other with a gap provided therein, and is imparted with elasticity. At this time, since the base sheet 2 is stretched in the transport direction, it shrinks in the width direction orthogonal to the transport direction. For example, when the width when introduced into one of the processing rolls 12 is 350 mm, the width immediately after being discharged from the processing rolls 12 and 14 is 330 mm.
- the temperature of the outer peripheral surfaces 12s and 14s of the processing rolls 12 and 14 is preferably 10 ° C. or higher and preferably lower than the melting point temperature of the base sheet 2, and more preferably 10 ° C. or higher and 60 ° C. or lower. It is even more preferable to keep the temperature at 30 ° C. or higher and 60 ° C. or lower. Therefore, a heater 11h (see FIG. 2) is provided on at least one processing roll 12, preferably both processing rolls 12 and 14. For example, the heater 11h heats the outer peripheral surface 12s of one of the processing rolls 12 so that the temperature is 10 ° C. or higher and 60 ° C. or lower, preferably 30 ° C. or higher and 60 ° C. or lower. ..
- the outer peripheral surfaces 12s and 14s of both processing rolls 12 and 14 are heated so that the temperature is 10 ° C. or higher and 60 ° C. or lower, preferably 30 ° C. or higher and 60 ° C. or lower. ..
- the heater is preferably provided inside the processing rolls 12 and 14, but may be provided outside.
- a residual heat heater that preliminarily heats the base sheet 2 before processing may be provided on the upstream side of the processing rolls 12 and 14.
- the base material sheet 2 is in contact with and along the outer peripheral surface 12s of one of the processing rolls 12 immediately before passing between the processing rolls 12 and 14. That is, the transport path 3 includes a winding portion 12a along the outer peripheral surface 12s of one of the processing rolls 12 immediately before the meshing portion 12b.
- the range of the winding portion 12a and the meshing portion 12b, that is, the angle ⁇ around the rotation center line 12x of one of the processing rolls 12 is preferably 180 ° or more and 270 ° or less.
- the base sheet 2 is conveyed longer along the outer peripheral surface 12s of one of the processing rolls 12, and when the base sheet 2 is heated by one of the processing rolls 12, the base sheet has greater elasticity. Can be given to 2.
- the base material sheet 2 passes between the pair of processing rolls 12 and 14, then passes through the guide rolls 33 and 34, and reaches the second drive roll 18.
- the second drive roll 18 is rotationally driven in the direction indicated by the arrow 18r, and conveys the base sheet 2 in contact with the outer peripheral surface 18s of the second drive roll 18 at the same speed as the peripheral speed of the second drive roll 18. do.
- the peripheral speed of the second drive roll 18 is set according to the draw ratio of the base sheet 2 so that the stretched base sheet 2 is pulled out from between the processing rolls 12 and 14 in a stable state. , 14 larger than the peripheral speed.
- the peripheral speed of the second drive roll 18 is 3.2 times the peripheral speed of the processing rolls 12 and 14.
- the shrinkage in the width direction orthogonal to the transport direction is not restricted, so that when the base sheet 2 is pulled out from between the processing rolls 12 and 14. It shrinks in the width direction between the processing rolls 12 and 14 and the second drive roll 18.
- the width immediately after ejection from the processing rolls 12 and 14 is 330 mm
- the width of the second drive roll 18 is 290 mm.
- the base sheet 2 is adhered to the additional sheet 4 to which the hot melt adhesive is applied by the hot melt coating device 40.
- the base sheet 2 and the additional sheet 4 may be bonded to each other by ultrasonic bonding or the like.
- the crimping roll 20 is rotationally driven in the direction indicated by the arrow 20r, and conveys the base material sheet 2 in contact with the outer peripheral surface 20s of the crimping roll 20 at the same speed as the peripheral speed of the crimping roll 20.
- the peripheral speed of the crimping roll 20 may be the same as the peripheral speed of the second drive roll 18, or may be larger than the peripheral speed of the second drive roll 18.
- a one-layer sheet containing only the base sheet 2 may be manufactured without joining the additional sheet 4 to the base sheet 2.
- the crimping roll 20, the nip roll 22, the hot melt coating device 40, and the like are unnecessary.
- FIG. 2 is a block diagram of the sheet processing apparatus 10.
- the control unit 11 such as a sequencer that controls the entire sheet processing device 10 has a first motor 16m for rotationally driving the first drive roll 16 and a second drive.
- the second motor 18m that rotationally drives the roll 18, the third motor 12m that rotationally drives the pair of machining rolls 12 and 14, and the substrate sheet 2 act immediately before reaching the outer peripheral surface 12s of one of the machining rolls 12.
- the first detector 17 that detects the first tension T1 (see FIG. 1) in the transport direction and the second detector in the transport direction that acts on the base sheet 2 immediately after being discharged from between the processing rolls 12 and 14.
- the second detector 19 for detecting the tension T2 (see FIG. 1) and the heater 11h are connected to each other.
- control unit 11 monitors the second tension T2 based on the output signal from the second detector 19, and (a) the second so that the second tension T2 exceeds the second predetermined value.
- the rotation speed of the motor 18m is adjusted to control the rotation of the second drive roll 18, and / or (b) the rotation speed of the third motor 12m is adjusted to rotate the pair of machining rolls 12, 14. You may control it.
- the second predetermined value may be large enough that the base sheet 2 stretched at the meshing portion 12b is pulled out from between the processing rolls 12 and 14 in a stable state, so that the stretching ratio at the meshing portion 12b is high. When it is large to some extent, it can be, for example, less than 10% of the breaking load in the transport direction of the base sheet 2 before processing, and less than 5% is more preferable.
- FIG. 3 is a schematic view of a main part in which the vicinity of the meshing portion 12b of the pair of processing rolls 12 and 14 of the sheet processing apparatus 10 is enlarged.
- the base material sheet 2 transported along the transport path 3 is transported in the direction indicated by the arrow 2x while being supported by the teeth 13 of one of the processing rolls 12, and reaches the meshing portion 12b.
- the portion supported between the adjacent teeth 13 is pushed down toward the inside of the one processing roll 12 by the teeth 15 of the other processing roll 14, whereby the base sheet 2 in the meshing portion 12b.
- T d (not shown. The size varies depending on the position where the processing rolls 12 and 14 mesh with the teeth 13 and 15) is generated in the transport direction.
- the first tension T1 in the transport direction acting on the base sheet 2 immediately before reaching the outer peripheral surface 12s of one of the processing rolls 12 acts on the base sheet 2 in the meshing portion 12b. It can be made smaller than the tension T d of. Therefore, the base sheet 2 can be stretched under the processing condition that the first tension T1 is less than 10% of the breaking load in the transport direction of the base sheet 2 before processing.
- the base sheet 2 is pushed down to the base sheet 2 by the tooth 15 of the other processing roll 14 at an intermediate position of the portion supported by the adjacent teeth 13 of the one processing roll 12. Friction force is generated. Due to this frictional force, the tension T2 (see FIG. 1) in the transport direction of the base sheet 2 immediately after passing through the meshing portion 12b is smaller than the tension T d in the transport direction acting on the base sheet 2 in the meshing portion 12b. Become.
- the base sheet 2 when the base material sheet 2 is conveyed along the outer peripheral surface 12s of one of the processing rolls 12 at the winding portion 12a, the frictional force between the base sheet 2 and the outer peripheral surface 12s of the one processing roll 12 causes the transfer direction. Since the shrinkage in the orthogonal width direction is suppressed, the base sheet 2 does not break even if the tension T d in the transport direction of the base sheet 2 exceeds the breaking load at the meshing portion 12b. Therefore, the base sheet 2 is broken or damaged under the processing conditions in which the tension T d acting on the base sheet 2 at the meshing portion 12b exceeds 90% of the breaking load in the transport direction of the base sheet 2 before processing. The base sheet 2 can be stretched without any damage.
- the tension acting on the base sheet 2 before and after processing is within the conventionally known limited range (10% to 90% of the breaking load, etc.). Even if it comes off, the base sheet 2 can be stretched. Therefore, greater elasticity can be imparted to the base sheet 2.
- the base sheet 2 of the polyolefin-based stretchable non-woven fabric having a width of 350 mm was processed under various conditions in which the peripheral speeds of the rolls 12, 14, 16 and 18 were combined. ..
- the tension of the base sheet 2 in the transport direction was measured between the first drive roll 16 and one of the machining rolls 12.
- the draw ratio of the base sheet 2 after processing was examined.
- a test piece width 25 mm, length 100 mm
- a tensile test was conducted at a load cell speed of 300 mm / min.
- the breaking load was 23.2 N (3 sheets).
- the average value of the test pieces). Converted from this, the breaking load in the transport direction of the base sheet 2 having a width of 350 mm before processing is (23.2 N / 25 mm) ⁇ 350 mm 325 N.
- the tension (0.3N to 7.5N) in the transport direction acting on the base sheet 2 having a width of 350 mm immediately before reaching the outer peripheral surface 12s of one of the machining rolls 12 is the transport direction of the base sheet 2 before machining.
- the breaking load (325N) was 0.09% to 2.3%, which was less than 10%.
- the sheet manufacturing method includes (i) a transfer step of transporting the base sheet 2, and (ii) a pair of processing rolls 12 and 14 arranged so as to sandwich the transport path 3 to which the base sheet 2 is transported.
- the base sheet 2 is driven to rotate so that the uneven portions 13 and 15 formed along the outer peripheral surfaces 12s and 14s of the processing rolls 12 and 14 mesh with each other with a gap provided, and the processing roll 12 and A processing step of stretching the base material sheet 2 when passing between 14 is provided.
- the base material sheet 2 is in contact with and along the outer peripheral surface 12s of one of the processing rolls 12 immediately before passing between the processing rolls 12 and 14, and is conveyed along with the processing of the one.
- the base so that the tension in the transport direction acting on the base sheet 2 immediately before reaching the outer peripheral surface 12s of the roll 12 is less than 10% of the breaking load in the transport direction of the base sheet 2 before processing. Transport the material sheet.
- the friction between the base sheet 2 and the outer peripheral surface 12s of one of the processing rolls 12 can be utilized to suppress the shrinkage of the base sheet 2 in the width direction orthogonal to the transport direction. Therefore, it is possible to impart greater elasticity to the base material sheet as compared with the case where the mating portion is immediately stretched while tension is applied in the transport direction.
- the method for producing the sheet is such that the temperature of the outer peripheral surface 12s of the one processing roll 12 is 10 ° C. or higher and 60 ° C. or lower, preferably 30 ° C. or higher and 60 ° C. or lower. Further, a heating step of heating one of the processing rolls 12 is provided.
- the base sheet 2 can be processed without breaking or being damaged.
- the base sheet 2 is placed on the outer peripheral surface of the one processing roll 12 within a range of 180 ° or more and 270 ° or less about the rotation center line 12x of the one processing roll 12. Transport along 12s.
- the base sheet 2 is conveyed longer along the outer peripheral surface 12s of one of the processing rolls 12, and when the base sheet 2 is heated by one of the processing rolls 12, the base sheet 2 is sufficiently heated. It is possible to impart greater elasticity to the base sheet 2.
- ⁇ Modification 1> It is possible to configure the base sheet 2 without detectors 17 and 19 (see FIG. 2) for detecting the tension.
- the operating conditions of the motors 12m, 14m, 16m that can set the pre-processing tension and the post-processing tension of the base sheet 2 to predetermined values and can process the base sheet at a desired draw ratio are known in advance, the operation is in progress. Even if the tensions of the base sheet 2 are not detected by the detectors 17 and 19, the pre-machining tension and post-machining tension of the base sheet 2 are controlled while controlling the rotation speeds and load torques of the motors 12m, 14m and 16m. Is a predetermined value, and the base sheet can be processed at a desired draw ratio.
- Example 2 The sheet processing apparatus 10a of Example 2 and the sheet manufacturing method configured so that the interval between the processing rolls 12 and 14 can be widened will be described with reference to FIGS. 4 and 5.
- the sheet processing device 10a of the second embodiment has substantially the same configuration as the sheet processing device 10 of the first embodiment.
- the differences from the sheet processing apparatus 10 of the first embodiment will be mainly described, and the same reference numerals will be used for the same components as the sheet processing apparatus 10 of the first embodiment.
- the machining roll support mechanisms 11p and 11q support the machining rolls 12 and 14 so that the distance between the machining rolls 12 and 14 can be changed.
- the bearing portions 13p and 13q that rotatably support the shaft portions 12p and 12q of one of the processing rolls 12 are fixed to the main body frame 10k of the sheet processing apparatus 10a.
- the bearing portions 15p and 15q that rotatably support the shaft portions 14p and 14q of the other processing roll 14 are movably supported by the main body frame 10k in the directions indicated by the arrows 50a and 50b.
- the air cylinder 50 is fixed to the main body frame 10k so that the rod 52 faces downward.
- the bearing portions 15p and 15q of the other processing roll 14 are coupled to the rod 52 of the air cylinder 50.
- the air cylinder 50 is a machining roll moving device 51 that moves at least one of the machining rolls 12 and 14.
- the rod 52 of the air cylinder 50 protrudes and stretches as shown in FIG. 4, and the teeth 13 and 15 of the processing rolls 12 and 14 are the same as those in FIG. 3 described above. There is a gap between them and they mesh with each other.
- the bearing portions 15p and 15q of the machining roll 14 come into contact with a predetermined position (not shown) of the main body frame 10k to prevent movement, and the distance between the machining rolls 12 and 14 is maintained at a predetermined value. Ru.
- the pushing amount of the base sheet during the stretching process can be set to a predetermined value.
- the pushing amount of the base sheet during the stretching process can be defined by the meshing amount of the teeth 13 and 15 of the processing rolls 12 and 14.
- the pushing amount of the base sheet during the stretching process that is, the meshing amount of the teeth 13 and 15 of the processing rolls 12 and 14, is D, and the radius of the outer peripheral surfaces 12s and 14s of the processing rolls 12 and 14 (see FIG. 1).
- L be the distance between the rotation center lines 12x and 14x of R1, R2 and the processing rolls 12 and 14, and the pushing amount D of the base sheet during the stretching process and the processing rolls 12 and 14 are according to the following equation 1.
- the air cylinder 50 is provided with the lock mechanism 60 shown in FIG. 5 in order to suppress variations in the stretching amount of the base sheet.
- FIG. 5 is a structural principle diagram of the lock mechanism 60.
- FIG. 5A shows an unlocked state
- FIG. 5B shows a locked state.
- the taper ring 64 is fixed to the release piston 62, and the release piston 62 and the taper ring 64 are urged by the brake spring 66 in the direction indicated by the arrow 60a.
- the taper ring 64 is a tubular member having a cylindrical outer peripheral surface and a conical inner peripheral surface whose inner diameter increases in the direction indicated by the arrow 60a.
- a steel ball 70 is rotatably held by a ball retainer 72.
- a brake shoe holder 74 and a brake shoe 76 are arranged between the steel ball 70 and the rod 52.
- the lock mechanism 60 is a separation preventing means for fixing the meshing amount D of the uneven portions 13 and 15 of the processing rolls 12 and 14 so as to be released. Since the pushing amount D of the base sheet can be fixed by using the lock mechanism 60 during the stretching process of the base sheet, the amount of stretching of the base sheet varies depending on the basis weight, width, transport speed, etc. of the base sheet. Can be suppressed.
- a processing roll holding device 80 may be provided as shown in FIG.
- the processing roll holding device 80 includes a detection device 82 for detecting the pushing amount D of the base sheet during stretching processing, and a control device 84 for controlling the air cylinder 50.
- the detection device 82 is a sensor or the like that detects the position of the other processing roll 14, the position of the bearing portions 15p, 15q of the other processing roll 14, or the protruding length of the rod 52 of the air cylinder 50.
- the control device 84 calculates the push-in amount D of the base sheet being stretched based on the detection signal 83 from the detection device 82, and keeps the push-in amount D within a certain range while monitoring the push-in amount D.
- the air cylinder 50 is controlled in such a manner. For example, in the control device 84, when the pushing amount D of the base sheet during the drawing process falls below a predetermined value, the tooth 15 of the other processing roll 14 reaches the pushing amount of the base sheet at the start of the drawing process. A control signal 85 for pushing in again is sent to the air cylinder 50.
- the machining roll holding device 80 is a separation preventing means for suppressing the meshing amount D of the uneven portions 13 and 15 of the machining rolls 12 and 14 within a predetermined range so as to be able to be released. Since the pushing amount of the base sheet can be kept substantially constant by using the processing roll holding device 80 during the stretching process of the base sheet, the base sheet is stretched due to differences in the basis weight, width, transport speed, etc. of the base sheet. Variation in quantity can be suppressed.
- the separation preventing means may be configured to fix or suppress the positions of the bearing portions 15p and 15q themselves of the other processing roll 14 instead of the air cylinder 50.
- the machining roll support mechanisms 11p and 11q movably support both of the pair of machining rolls 12 and 14, the machining roll moving device moves both of the pair of machining rolls 12 and 14, and the separation preventing means is the machining roll.
- the meshing amount D of the uneven portions 13 and 15 of the 12 and 14 may be releasably fixed or suppressed within a predetermined range.
- the sheet manufacturing method of Example 2 adds the following features to the sheet manufacturing method of Example 1. That is, the machining rolls 12 and 14 are supported so that at least one 14 of the machining rolls 12 and 14 can be moved to change the distance between the machining rolls 12 and 14. In the processing step, the meshing amount D of the uneven portions 13 and 15 of the processing rolls 12 and 14 is fixed or suppressed within a predetermined range.
- the tension in the transport direction acting on the base sheet 2 when the base sheet 2 passes between the processing rolls 12 and 14 is the tension of the base sheet 2 and one of the processing rolls 12. Since the friction between the outer peripheral surface 12s and the outer peripheral surface 12s can be used to increase the tension, the base sheet 2 can be provided with greater elasticity.
- the present invention is not limited to the above embodiment, and can be implemented with various modifications.
- the uneven portion of the pair of processing rolls 12 and 14 is not limited to the spur gear shape or the straight tooth shape, but may have various forms such as a helical gear shape and a zigzag shape uneven portion.
Abstract
Description
D=R1+R2-L (式1)
3 搬送経路
10,10a シート加工装置
11 制御部(張力制御装置)
11h ヒータ
11p,11q 加工ロール支持機構
12 加工ロール
12m 第3のモータ(張力制御装置)
12s 外周面
13 歯(凹凸部)
14 加工ロール
14s 外周面
15 歯(凹凸部)
16 第1の駆動ロール
16m 第1のモータ(張力制御装置)
18 第2の駆動ロール
18m 第2のモータ
19 第2の検出器
50 エアシリンダ
51 加工ロール移動装置
60 ロック機構(離間防止手段)
80 加工ロール保持装置(離間防止手段)
Claims (8)
- 基材シートを搬送する搬送工程と、
前記基材シートが搬送される搬送経路を挟むように配置された一対の加工ロールを、前記加工ロールそれぞれの外周面に沿って形成された凹凸部が互いに隙間を設けて噛み合うように回転駆動して、前記基材シートが前記加工ロールの間を通るときに前記基材シートを延伸する加工工程と、
を備えるシートの製造方法であって、
前記搬送工程において、前記基材シートを、前記加工ロールの間を通る直前に一方の前記加工ロールの前記外周面に接し、かつ沿うように搬送するとともに、前記一方の加工ロールの前記外周面に達する直前に前記基材シートに作用する搬送方向の張力が、加工前の前記基材シートの搬送方向の破断荷重の10%未満になるように、前記基材シートを搬送する、シートの製造方法。 - 前記一方の加工ロールの前記外周面の温度が10℃以上、かつ60℃以下になるように、前記一方の加工ロールを加熱する加熱工程を、さらに備える、請求項1に記載のシートの製造方法。
- 前記搬送工程において、前記一方の加工ロールの回転中心線を中心として180°以上、かつ270°以下の範囲において、前記基材シートを前記一方の加工ロールの前記外周面に沿うように搬送する、請求項1又は2に記載のシートの製造方法。
- 前記加工ロールの少なくとも一方を移動させて前記加工ロールの間の距離を変更できるように、前記加工ロールを支持し、
前記加工工程において、前記加工ロールの凹凸部の噛み合い量を固定又は所定範囲内に抑制する、請求項1乃至3のいずれか一つに記載のシートの製造方法。 - 基材シートが搬送される搬送経路を挟むように配置され、それぞれの外周面に沿って形成された凹凸部が互いに隙間を設けて噛み合うように回転する一対の加工ロールを備えるシート加工装置であって、
前記基材シートが前記加工ロールの間を通る直前に一方の前記加工ロールの前記外周面に接し、かつ沿って搬送されるように構成され、
前記基材シートが前記一方の加工ロールに達するまでの前記搬送経路に沿って配置され、前記基材シートを送り出すように回転駆動される駆動ロールと、
前記基材シートが前記一方の加工ロールに達する直前に前記基材シートに作用する搬送方向の張力が、加工前の前記基材シートの前記搬送方向の破断荷重の10%未満になるように、前記駆動ロールと前記加工ロールとのうちいずれか一方又は両方の回転を制御する張力制御装置とを、
さらに備える、シート加工装置。 - 前記一方の加工ロールの前記外周面の温度が10℃以上、かつ60℃以下になるように、前記一方の加工ロールを加熱するヒータを、さらに備える、請求項5に記載のシート加工装置。
- 前記基材シートが前記一方の加工ロールの前記外周面に沿って、前記一方の加工ロールの回転中心線を中心として180°以上、かつ270°以下の範囲において搬送されるように構成されている、請求項5又は6に記載のシート加工装置。
- 前記加工ロール間の距離を変更可能に、前記加工ロールを支持する加工ロール支持機構と、
前記加工ロールの少なくとも一方を移動させる加工ロール移動装置と、
前記加工ロールの凹凸部の噛み合い量を解除可能に固定又は所定範囲内に抑制する離間防止手段と、
を、さらに備える、請求項5乃至7のいずれか一つに記載のシート加工装置。
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JP2022565367A JPWO2022113994A1 (ja) | 2020-11-24 | 2021-11-24 | |
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JP2007022066A (ja) * | 2005-06-17 | 2007-02-01 | Kao Corp | 伸縮性シート及びその製造方法 |
US20100040875A1 (en) * | 2006-12-29 | 2010-02-18 | Dow Global Technologies Inc. | Films, articles prepared therefrom, and methods of making the same |
WO2010151398A1 (en) * | 2009-06-26 | 2010-12-29 | The Procter & Gamble Company | Systems and methods for varying the repeat pitch distance of a substrate for use with absorbent articles |
JP4757139B2 (ja) | 2006-08-09 | 2011-08-24 | 花王株式会社 | シートの製造方法及び加工装置 |
JP2011184833A (ja) * | 2010-03-10 | 2011-09-22 | Unicharm Corp | 伸縮性シートの製造方法、及び製造装置 |
JP2013231249A (ja) * | 2012-04-27 | 2013-11-14 | Uni Charm Corp | 複合シートおよび複合シートの製造方法 |
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JP2007022066A (ja) * | 2005-06-17 | 2007-02-01 | Kao Corp | 伸縮性シート及びその製造方法 |
JP4757139B2 (ja) | 2006-08-09 | 2011-08-24 | 花王株式会社 | シートの製造方法及び加工装置 |
US20100040875A1 (en) * | 2006-12-29 | 2010-02-18 | Dow Global Technologies Inc. | Films, articles prepared therefrom, and methods of making the same |
WO2010151398A1 (en) * | 2009-06-26 | 2010-12-29 | The Procter & Gamble Company | Systems and methods for varying the repeat pitch distance of a substrate for use with absorbent articles |
JP2011184833A (ja) * | 2010-03-10 | 2011-09-22 | Unicharm Corp | 伸縮性シートの製造方法、及び製造装置 |
JP2013231249A (ja) * | 2012-04-27 | 2013-11-14 | Uni Charm Corp | 複合シートおよび複合シートの製造方法 |
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