CN109982832A - 复合片的制造方法和制造装置 - Google Patents
复合片的制造方法和制造装置 Download PDFInfo
- Publication number
- CN109982832A CN109982832A CN201780071593.2A CN201780071593A CN109982832A CN 109982832 A CN109982832 A CN 109982832A CN 201780071593 A CN201780071593 A CN 201780071593A CN 109982832 A CN109982832 A CN 109982832A
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- Prior art keywords
- composite sheet
- manufacturing
- ultrasonic
- roller
- manufacturing device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
- B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
- B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
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- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
- B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
- B29C65/7437—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a perforating tool
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- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
- B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
- B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
- B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one of the parts to be joined
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/006—Preventing damaging, e.g. of the parts to be joined
- B29C66/0062—Preventing damaging, e.g. of the parts to be joined of the joining tool, e.g. avoiding wear of the joining tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
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- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
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Abstract
本发明的复合片的制造方法包括:一边使在周面部具有彼此啮合的凹凸的第一辊(31)和第二辊(32)旋转,一边将第一片(1)导入至啮合部(33)而使其变形为凹凸形状的工序;将变形为凹凸形状的第一片(1)保持在第一辊(31)上输送,且使第二片(2)重叠于输送中的第一片(1)的工序;和将重叠的两个片(1、2)夹在第一辊(31)的凸部(35)与超声波熔接机的超声波变幅杆(42)之间而施加超声波振动的工序,而且,在超声波处理工序中的超声波振动的施加时形成具有贯通孔(14)的熔接部(4)。
Description
技术领域
本发明涉及一种复合片的制造方法和制造装置。
背景技术
作为一次性尿布或经期卫生巾等吸收性物品的正面片,已知在与穿着者的肌肤抵接的面形成有凹凸的结构。
例如,本申请人提出一种复合片,其具有第一和第二片熔接而得的多个熔接部,且第一片中的除熔接部以外的部分形成向第二片侧的相反侧突出的凸部。该复合片由于在表面形成有凹凸,因此肌肤触感、液体的扩散防止性优异。
此外,也已知在此种复合片中的熔接部形成贯通孔而提高液体的引入性等(参照专利文献1、2)。在专利文献2中,也记载有为了形成具有贯通孔的熔接部,而在凹凸辊的凸部的前端部设置有在其与周围的肩部之间具有阶差的开孔形成用的小凸部,将2个片夹在该小凸部与砧辊之间进行加热而形成具有开孔的熔接部。
现有技术文献
专利文献
专利文献1:日本专利特开2006-175688号公报
专利文献2:日本专利特开2006-175689号公报
发明内容
本发明提供一种复合片的制造方法,该复合片具有第一片和第二片熔接而得的多个熔接部,且所述第一片中的除所述熔接部以外的部分的至少一部分形成向所述第二片侧的相反侧突出的凸部。该复合片的制造方法包括:赋形工序,其一边使在周面部具有彼此啮合的凹凸的第一辊和第二辊旋转,一边将所述第一片导入至该两个辊的啮合部而使其变形为凹凸形状;重叠工序,其将变形为凹凸形状的所述第一片保持在所述第一辊上进行输送,且使所述第二片重叠在输送中的所述第一片;和超声波处理工序,其将重叠后的两个片夹在所述第一辊的凸部与超声波熔接机的超声波变幅杆之间而施加超声波振动。在所述超声波处理工序中,在施加该超声波振动时,形成具有贯通孔的所述熔接部。
此外,本发明提供一种复合片的制造装置,该复合片具有第一片和第二片熔接而得的多个熔接部,且所述第一片中的除所述熔接部以外的部分的至少一部分形成向所述第二片侧的相反侧突出的凸部。该复合片的制造装置包括:凹凸赋形部,其具有在周面部具有彼此啮合的凹凸的第一辊和第二辊,且使导入至该两个辊的啮合部的所述第一片变形为凹凸形状;和超声波处理部,其包括超声波熔接机,且在使所述第二片重叠在变形为凹凸形状的状态的所述第一片上之后,将该两个片夹在所述第一辊的凸部与所述超声波熔接机的超声波变幅杆之间而局部地施加超声波振动,形成具有贯通孔的所述熔接部。
附图说明
图1是表示利用本发明的复合片的制造方法和装置制造的复合片的一例的主要部分立体图。
图2是从第一片侧观察图1所示的复合片的放大平面图。
图3是表示本发明的复合片的制造方法的第一实施形态和本发明的复合片的制造装置的第一实施方式的概略图。
图4是将图3所示的第一辊的主要部分放大表示的立体图。
图5是表示图3所示的超声波焊接机的主要部分的图,且是表示从图3中的左侧观察的状态的图。
图6是表示本发明的复合片的制造方法的第二实施形态和本发明的复合片的制造装置的第二实施方式的主要部分的图。
图7是表示本发明的复合片的制造方法的第三实施形态和本发明的复合片的制造装置的第三实施方式的主要部分的图。
图8(a)是表示在前端部设置有具有蓄热性的合成树脂层的超声波变幅杆的另一例的图,图8(b)是表示在包括钛合金等金属的超声波变幅杆的主体部分的前端面,通过熔射而仅形成连接层的状态的图。
具体实施方式
在制造复合片时,若利用不同的工序进行熔接部的形成和贯通孔的形成,则有在熔接部的位置与贯通孔的位置之间产生错位的情况,此外,专利文献2中所记载的在凸部的前端部设置小凸部的方法中,小凸部容易磨损,在维护负担大等方面有改善的余地。
因此,本发明涉及能够解决现有技术所具有的待解决课题的复合片的制造方法和制造装置。
以下,基于本发明的优选的实施方式,参照附图对本发明进行说明。
首先,参照图1,对利用本发明的复合片的制造方法或制造装置制造的复合片进行说明。
图1所示的复合片10是利用本发明的复合片的制造方法或制造装置制造的复合片的一例,如图1所示,具有第一片1和第二片2熔接而得的多个熔接部4,且第一片1中的除熔接部4以外的部分的至少一部分形成有向与第二片2侧相反的一侧突出的凸部5。
复合片10优选用作吸收性物品的正面片等。在用作吸收性物品的正面片时,第一片1形成朝向穿着者的肌肤侧的面(以下也称为肌肤相对面),第二片2形成穿着时朝向吸收体侧的面(以下也称为非肌肤相对面)。
凸部5和熔接部4在与复合片10的面平行的一个方向即图1中的X方向上,以交替地且形成一排的方式配置,此种排在与复合片10的面平行且与所述一个方向正交的方向即图1中的Y方向上形成有多排。彼此邻接的排中的凸部5和熔接部4分别在X方向上错开配置,更具体而言错开半个节距地配置。
在复合片10中,所述Y方向与制造时的行进方向(MD,机械方向)一致,所述X方向和与制造时的行进方向正交的方向(CD)一致。
第一片1和第二片2由片材料构成。作为片材料,例如能够使用无纺布、织布和针织布等纤维片或膜等,从肌肤触感等观点而言,优选使用纤维片,特别优选使用无纺布。构成第一片1和第二片2的片材料的种类可以相同,或者也可以不同。
作为使用无纺布作为构成第一片1和第二片2的片材料时的无纺布,例如能够列举热风无纺布、纺粘无纺布、水刺无纺布、熔喷无纺布、树脂粘合无纺布、针刺无纺布等。也能够使用将这些无纺布组合2种以上而成的层叠体、或将这些无纺布与膜等组合而成的层叠体。用作构成第一片1和第二片2的片材料的无纺布的克重优选为10g/m2以上,更优选为15g/m2以上,此外优选为40g/m2以下,更优选为35g/m2以下。无纺布的克重优选为10g/m2以上且40g/m2以下,更优选为15g/m2以上且35g/m2以下。
作为构成无纺布的纤维,能够使用包括各种热塑性树脂的纤维。作为无纺布以外的片材料,构成纤维或构成树脂也优选使用包括各种热塑性树脂的材料。
作为热塑性树脂,能够列举聚乙烯、聚丙烯、聚丁烯等聚烯烃、聚对苯二甲酸乙二酯、聚对苯二甲酸丁二酯等聚酯、尼龙6、尼龙66等聚酰胺、聚丙烯酸、聚甲基丙烯酸烷基酯、聚氯乙烯、聚偏氯乙烯等。这些树脂能够将1种单独使用或作为2种以上的掺合物使用。此外,能够以芯鞘型或并列型等复合纤维的形态使用。
复合片10如图1所示,在第一片1侧的面,在X方向和Y方向的两个方向上具有被凸部5夹着的多个凹部3,在各个凹部3的底部,形成有具有贯通孔14的熔接部4。整体观察时,复合片10在第一片1侧的面具有包含所述凹部3和所述凸部5的起伏较大的凹凸,第二片2侧的面平坦,或成为与第一片1侧的面相比起伏较小的大致平坦面。
复合片10中的各个熔接部4如图2所示,具有在所述Y方向上较长的大致长方形的俯视形状,在各者的内侧,形成有俯视形状为大致长方形的贯通孔14。换言之,各个熔接部4形成为包围贯通孔14的环状。贯通孔14优选在一个熔接部4仅形成有一个,且优选形成于在与熔接部4的位置的关系中预先决定了的特定位置。此外,贯通孔14的俯视形状既可以与熔接部4的外周缘的俯视形状为相似形也可以不为相似形,但优选为相似形。
在熔接部4中,通过构成第一片1和第二片2的至少一者的热熔接性树脂熔融固化而使第一片1与第二片2结合。在第一片1和第二片2由无纺布等纤维片构成时,在熔接部4中,第一片1和第二片2的构成纤维优选熔融或埋没至熔融的树脂,而无法用目视观察到纤维状的形态,即成为外观上膜化的状态。
接着,对本发明的复合片的制造方法的第一实施形态进行说明。
在第一实施形态中,使用图3所示的第一实施方式的复合片的制造装置20,制造所述复合片10。
对图3所示的复合片的制造装置20进行说明,复合片的制造装置20包括凹凸赋形部30、超声波处理部40和预热机构6,该预热机构6将施加超声波振动前的片预热至被控制的规定温度。
凹凸赋形部30如图3所示,具有在周面部具有彼此啮合的凹凸的第一和第二辊31、32,且通过一边使两个辊31、32旋转,一边将第一片1导入至该两个辊31、32的啮合部33,而将第一片1变形为依照第一辊31的周面部的凹凸的形状的凹凸形状。
图4是将第一辊31的主要部分放大表示的立体图。在图4中表示了第一辊31的周面部的一部分。
第一辊31将具有规定齿宽的正齿轮31a、31b、……组合多个而形成为辊状。各齿轮的齿形成第一辊31的周面部中的凹凸形状的凸部35,该凸部35的前端面35c成为在与下述超声波熔接机41的超声波变幅杆42的前端面42t之间,对作为熔接对象的第一和第二片1、2进行加压的加压面。
各齿轮的齿宽(齿轮的轴向的长度)决定复合片10的凸部5中的所述X方向的尺寸,各齿轮的齿的厚度(齿轮的旋转方向的长度)决定复合片10的凸部5中的所述Y方向的尺寸。相邻的齿轮以其齿的节距分别错开半个节距的方式组合。其结果是,第一辊31的周面部成为凹凸形状。在本实施方式中,各凸部35的前端面35c成为第一辊31的旋转方向为长边、轴向为短边的矩形形状。当前端面35c为旋转方向上较长的形状时,能够使第一辊31的一个凸部35与超声波变幅杆42的前端面42t的接触时间变长而容易提高温度,因此优选。
第一辊31中的各齿轮的齿槽部形成第一辊31的周面上的凹凸的凹部。在各齿轮的齿槽部的底部形成有抽吸孔34。抽吸孔34连通于鼓风机或真空泵等抽吸源(未图示),以在从第一辊31与第二辊32的啮合部33至第一片1与第二片2的合流部之间进行抽吸的方式被控制。因此,通过第一辊31与第二辊32的啮合而变形为凹凸形状的第一片1,利用经由抽吸孔34的抽吸力,以维持在变形为依照第一辊31的凹凸形状的状态的状态,被输送至第一片1与第二片2的合流部和超声波熔接机的超声波振动的施加部36。
此时,如图4所示,当在相邻的齿轮间设置有规定的空隙G时,能够抑制对第一片1施加过度的伸长力、或由于两辊31、32的啮合部33而将第一片1切断,从而能够使第一片1变形为依照(沿着)第一辊31的周面的形状,因此优选。
第二辊32在周面部具有与第一辊31的周面部的凹凸彼此啮合的凹凸形状。第二辊32除了不具有抽吸孔34以外,具有与第一辊31相同的结构。一边使具有彼此啮合的凹凸的第一和第二辊31、32旋转,一边将第一片1导入至两辊31、32的啮合部33,由此能够使第一片1变形为凹凸形状。在啮合部33中,第一片1的多个部位被第二辊32的凸部压入至第一辊31的周面部的凹部,该被压入的部分成为制造出的复合片10的凸部5。在第二辊32的周面部,形成有插入至第一辊31的凹部中的多个凸部,但并非必须在第二辊32形成有与第一辊31的凹部全部对应的凸部。
超声波处理部40如图3所示,具有包括超声波变幅杆42的超声波熔接机41,使第二片2重叠在变形为凹凸形状的状态的第一片1上之后,将该两个片夹在第一辊31的凸部与超声波变幅杆42之间而局部地施加超声波振动,形成具有贯通孔14的熔接部4。
超声波熔接机41如图3和图5所示,包括超声波振荡器(未图示)、转换器43、加速器44和超声波变幅杆42。超声波振荡器(未图示)与转换器43电连接,由超声波振荡器产生的频率15kHz~50kHz左右的波长的高电压的电信号被输入至转换器43。超声波振荡器(未图示)设置在可动台45上或可动台45外。
转换器43内置加压压电组件等压电元件,将从超声波振荡器输入的电信号用压电组件转换为机械振动。加速器44对从转换器43发出的机械振动的振幅进行调整,优选进行放大后传递至超声波变幅杆42。超声波变幅杆42由铝合金或钛合金等金属块形成,设计为按照所使用的频率正确地进行共振。从加速器44传递至超声波变幅杆42的超声波振动在超声波变幅杆42的内部放大或衰减后,施加至作为熔接对象的第一和第二片1、2。作为该超声波熔接机41,能够将市售的超声波变幅杆、转换器、加速器、超声波振荡器组合使用。
超声波熔接机41固定在可动台45上,通过使可动台45的位置向接近第一辊31的周面的方向进退,能够调节超声波变幅杆42的前端面42t与第一辊31的凸部35的前端面35c间的间隙、以及对层叠的第一和第二片1、2的加压力。
通过一边将作为熔接对象的第一和第二片1、2夹在第一辊31的凸部35的前端面35c与超声波熔接机41的超声波变幅杆42的前端面42t之间进行加压,一边对其施加超声波振动,第一片1中的位于凸部35的前端面35c上的部分分别熔接于第二片2,形成熔接部4,并且贯通两个片1、2的贯通孔14形成为被熔融部分包围的状态。
在优选的实施方式中,复合片的制造装置20包括具有配置在第一辊31内的加热器61的预热机构6。更具体而言,包括配置在第一辊31内的加热器61等加热机构、能够测量施加超声波振动前的片的温度的测温机构(未图示)和基于测温机构的测量值来控制加热器61的温度的温度控制部(未图示)。通过基于测温机构的测量值,控制加热器61对第一辊31的周面部加热的加热温度,能够将即将施加超声波振动前的第一片1的温度高精度地控制为所期望的温度。
在优选的实施方式中,加热器61沿着第一辊31的轴长方向嵌入至第一辊31中。此外,加热器61在第一辊31的旋转轴的周围的外周部的附近,在周向上设置有间隔地配置有多个。加热器61对第一辊31的周面部加热的加热温度由未图示的温度控制部控制,能够将复合片的制造装置20的运转中导入至超声波振动的施加部36的第一片1的温度维持为规定范围的温度。
预热机构6优选包括从外部对加热对象物施加热能而加热的加热机构。作为加热机构,例如能够列举使用电热线的匣式加热器等,但并不限定于此,能够无特别限制地使用各种公知的加热机构。
超声波熔接机对熔接对象物施加超声波振动,由此使熔接对象物发热和熔融而进行熔接,不包含于此处所言及的加热机构。
在本发明的第一实施形态的制造方法中,如图3所示,一边使第一和第二辊31、32旋转,一边将从坯料辊(未图示)送出的第一片1导入至该两个辊31、32的啮合部33,而使其变形为凹凸形状(赋形工序)。然后,将变形为凹凸形状的第一片1保持在第一辊31上进行输送,使从与第一片1不同的坯料辊(未图示)送出的第二片2重叠于输送中的第一片1(重叠工序)。然后,将该重叠后的两个片1、2夹在第一辊31的凸部35与超声波熔接机的超声波变幅杆42之间并施加超声波振动(超声波处理工序)。在超声波处理工序中,在超声波振动的施加时,形成具有贯通孔14的熔接部4。
在第一实施形态的制造方法中,优选的是,在该超声波振动的施加前,将第一片1和第二片2的至少一者预先加热至低于该片的熔点、且比该熔点低50℃的温度以上的温度。即,优选在超声波振动的施加前,进行以下的(1)和(2)的任一者或两者。
(1)将第一片1预先加热至低于该第一片的熔点、且比该熔点低50℃的温度以上的温度。
(2)将第二片2预先加热至低于该第二片的熔点、且比该熔点低50℃的温度以上的温度。
优选的是,将第一片1预先加热至低于该第一片的熔点、且比该熔点低50℃的温度以上的温度,并且将第二片2预先加热至低于该第二片的熔点、且比该熔点低50℃的温度以上的温度。
作为使第一片1成为低于第一片1的熔点、且比该熔点低50℃的温度以上的温度的方法,例如,在第一和第二辊31、32的啮合部33与超声波熔接机的超声波振动的施加部36之间,测量第一辊31上的第一片1的温度,且以其测量值成为所述特定范围内的方式,控制第一辊31的周面部的温度。作为使第一片1预热至特定范围的温度的方法,能够代替以使第一片1成为特定范围的温度的方式利用配置在第一辊31内的加热器控制第一辊31的周面部的温度的方法,而使用各种方法。例如能够列举:在第一辊31的周面部的附近设置加热器或热风的吹出口、远红外线的照射装置,由此控制贴合第一片1前后的第一辊31的周面部的温度的方法;将在啮合部33接触第一片1的第二辊32加热,通过其周面部的温度控制来控制第一片1的温度的方法;以及对于贴合第一辊31前的第一片1,使其与加热的辊接触、或使其通过维持在高温的空间、或对其吹送热风的方法等。
另一方面,作为使第二片2成为低于第二片的熔点、且比该熔点低50℃的温度以上的温度的方法,优选将与第一片1合流前的第二片的温度用配置在第二片的输送路径中的测温机构测量,以其测量值成为所述特定范围内的方式,控制配置在第二片的输送路径中的第二片的加热机构(未图示)的温度。第二片的加热机构既可以为使其接触加热后的辊等的接触方式,也可以为使其通过维持在高温的空间、或对其吹送或贯通热风、或对其照射红外线等非接触方式。
第一片1和第二片2的熔点通过以下的方法测量。
例如,使用Perkin-Elmer公司制造的差示扫描热量测量装置(DSC,Differentialscanning calorimetry)PYRIS Diamond DSC来测量。根据测量资料的峰值计算出熔点。在第一片1或第二片2为无纺布等纤维片,且其构成纤维为包括芯鞘型、并列型等多个成分的复合纤维时,关于该片的熔点,将用DSC测量出的多个熔点中最低温度的熔点设为复合纤维片的熔点。
在第一实施形态的复合片的制造方法中,像这样将重叠的第一和第二片1、2夹在第一辊31的凸部与超声波熔接机的超声波变幅杆42之间而施加超声波振动,形成具有贯通孔14的熔接部4。在第一实施形态的复合片的制造方法中,优选将第一和第二片1、2的至少一者预先预热至该片不熔融的所述特定范围的温度,然后,对一者或两者被预热了的状态的两个片1、2施加超声波振动。此时,调节施加超声波振动时的条件例如施加的超声波振动的波长、强度、对两个片1、2加压的压力等,利用超声波振动,将两个片1、2熔融而形成熔接部4,并且将贯通两个片1、2的贯通孔14形成为由熔融部分包围的状态。
根据第一实施形态的复合片的制造方法,像这样将第一片1和第二片2的至少一者优选两者,用加热器等加热机构预先加热至片不熔融的程度的高温,然后在第一辊31的凸部35与超声波熔接机的超声波变幅杆42之间一边加压一边施加超声波振动,形成具有贯通孔14的熔接部4,由此与不将两个片1、2预热的情况相比,能够更可靠地形成具有贯通孔14的熔接部4,并且不易产生在将两个片1、2预热至超过熔点的温度时容易发生的不良情况,例如,熔融树脂向输送机构附着或片向输送辊的卷绕等不良情况,因此装置的维护负担也较小。
此外,通过在第一辊31的凸部35与超声波熔接机的超声波变幅杆42之间,同时地进行熔接部4的形成和贯通孔14的形成,在熔接部4的位置与贯通孔14的位置之间也不会产生错位。
通过第一实施形态的复合片的制造方法得到的复合片10具有凹凸,而且在凹部的底部具有熔接部4,该熔接部4具有贯通孔14,因此肌肤触感、平面方向上的液体的扩散防止性优异,此外透气性、液体的引入性也优异。
复合片10优选发挥该特性而用作吸收性物品的正面片,但复合片10的用途并不限定于此。
从更可靠地发挥所述一个或两个以上的效果的观点而言,本发明的制造方法和制造装置优选具有以下的结构。
(1)第一片1优选预热至比第一片1的熔点低50℃的温度以上、且低于该熔点的温度,更优选预热至比第一片1的熔点低20℃的温度以上、且比该熔点低5℃的温度以下的温度。
(2)第二片2优选预热至比第二片2的熔点低50℃的温度以上、且低于该熔点的温度,更优选预热至比第二片2的熔点低20℃的温度以上、且比该熔点低5℃的温度以下的温度。
第一片1和第二片2各者的预热温度从容易形成贯通孔14的观点而言,优选为100℃以上,更优选为130℃以上,此外,从防止向输送机构的附着、防止向输送辊的卷绕的观点而言,优选为150℃以下,更优选为145℃以下。
此外,从容易形成熔接部4、贯通孔14的观点而言,夹在第一辊31的凸部35的前端面35c与超声波变幅杆42的前端面42t之间而施加于第一和第二片1、2的加压力优选为10N/mm以上,更优选为15N/mm以上,此外,优选为150N/mm以下,更优选为120N/mm以下,此外,优选为10N/mm以上且150N/mm以下,更优选为15N/mm以上且120N/mm以下。
此处所言及的加压力是所谓线压,由超声波变幅杆42的加压力(N)除以与超声波变幅杆42接触的凸部35的齿宽(X方向)的合计(不包含第一辊31的凹部)的长度所得的值(每单位长度的压力)来表示。
此外,从容易形成熔接部4、贯通孔14的观点而言,施加的超声波振动的频率优选为15kHz以上,更优选为20kHz以上,此外,优选为50kHz以下,更优选为40kHz以下,此外,优选为15kHz以上且50kHz以下,更优选为20kHz以上且40kHz以下。
〔频率的测量方法〕
利用激光移位计等测量变幅杆前端的位移。通过将采样频率设为200kHz以上、将精度设为1μm以上而测量频率。
此外,从容易形成熔接部、贯通孔的观点而言,施加的超声波振动的振幅优选为20μm以上,更优选为25μm以上,此外,优选为50μm以下,更优选为40μm以下,此外,优选为20μm以上且50μm以下,更优选为25μm以上且40μm以下。
〔振幅的测量方法〕
利用激光移位计等测量变幅杆前端的位移。通过将采样频率设为200kHz以上、将精度设为1μm以上而测量振幅。
接着,对本发明的复合片的制造方法的第二和第三实施方式进行说明。
在第二实施方式中,使用在图6表示主要部分的第二实施方式的复合片的制造装置,制造所述复合片10。
第二实施方式的复合片的制造装置与所述复合片的制造装置20的不同点仅在于,包括加热超声波熔接机41的超声波变幅杆42的机构,以代替配置在第一辊31内的加热器61(预热机构)。更具体而言,第二实施方式的复合片的制造装置包括安装在超声波变幅杆42的加热器62,作为加热超声波变幅杆42的机构。
在第二实施形态的复合片的制造方法中,通过控制由加热器62加热的超声波变幅杆42的温度,将即将施加超声波振动前的第二片2的温度预先加热至低于该片2的熔点、且比该熔点低50℃的温度以上的温度,在该状态下,对夹在第一辊31的凸部35与超声波熔接机的超声波变幅杆42间的第一和第二片1、2施加超声波振动。
在通过加热器62等加热机构加热超声波变幅杆42时,在用超声波熔接机施加了超声波振动的状态下,第一和第二片1、2发热,难以测量由预热机构加热的片的温度。因此,在借助加热了的超声波变幅杆42将第一和第二片1、2的一者或两者预热时,不产生超声波振动而仅加热30分钟,之后测量该超声波变幅杆的前端面42t的温度,将其测量值设为由预热机构加热了的片的温度。
关于第二实施方式没有特别说明的方面与第一实施方式相同,适用关于第一实施方式的说明。
在第三实施方式中,使用图7中表示主要部分的第三实施方式的复合片的制造装置,制造所述复合片10。
第三实施方式的复合片的制造装置不包括在施加超声波振动前,将第一片和第二片的至少一者加热至规定温度的预热机构,而在超声波变幅杆42的前端部,配置有具有蓄热性的部件7(以下也称为“蓄热件”)。
在第三实施形态的制造方法中,与第一实施方式的制造方法同样地,将第一片1导入至第一和第二辊31、32的啮合部33而使其变形为凹凸形状,之后将该变形为凹凸形状的第一片1一边保持在第一辊31上一边向超声波振动的施加部36输送,使第二片2重叠在输送中的第一片1之后,将该重叠的两个片1、2夹在第一辊31的凸部35与超声波熔接机的超声波变幅杆42的前端面42t之间,而在超声波振动的施加部36施加超声波振动。
在第三实施形态的制造方法中,该超声波振动的施加如图7所示,在超声波变幅杆42的前端部配置有蓄热件7的状态下进行。
根据第三实施形态的制造方法,在复合片的制造装置的运转刚开始后,包括蓄热件7的超声波变幅杆42的前端部的温度为第一和第二片1、2的熔点以下,但若继续运转,则由于超声波振动而发热的第一和第二片1、2的热蓄积在蓄热件7中,蓄热件7的温度上升而成为第一片1和第二片2的熔点以上。然后,在蓄热件7的温度成为第一片1和第二片2各者的熔点以上的状态,调节施加超声波振动时的条件例如超声波振动的波长、强度、对两个片1、2加压的压力等,在施加超声波振动时,两个片1、2熔融,并且当贯通两个片1、2的贯通孔14形成为被熔融部分包围的状态时,能够可靠地形成具有贯通孔14的熔接部4,并且也不易产生片熔融而产生的熔融树脂向输送机构附着或片向输送辊卷绕等不良情况,因此装置的维护负担也较小。
此外,通过在第一辊31的凸部35与超声波熔接机的超声波变幅杆42之间,同时地进行熔接部4的形成和贯通孔14的形成,在熔接部4的位置与贯通孔14的位置之间也不会产生错位。
蓄热件7至少与构成超声波变幅杆42的金属相比,热导率较低。
蓄热件7优选通过下述方法测量出的热导率为2.0W/mK以下。蓄热件的热导率从不易向超声波变幅杆或大气散热的观点而言,优选为2.0W/mK以下,更优选为1.0W/mK以下,此外,从有效地加热片的观点而言,优选为0.1W/mK以上,更优选为0.5W/mK以上,此外,优选为0.1W/mK以上且2.0W/mK以下,更优选为0.5W/mK以上且1.0W/mK以下。
〔热导率的测量方法〕
蓄热件7的热导率使用热导率测量装置来测量。
蓄热件7优选使用具有耐热性的材料。蓄热件7的耐热温度优选为150℃以上,更优选为200℃以上,进而优选为250℃以上。无特别的耐热温度的上限,例如为1500℃以下。
蓄热件7也能够使用包括具有蓄热性的主体部分和用于将该主体粘接在超声波变幅杆的粘接剂层的结构,此时的热导率通过将粘接剂部分去除而进行测量。作为该蓄热件,例如能够使用日东电工制造的“玻璃布胶带”、日东电工制造的“耐热绝缘用聚酰亚胺胶带”等市售品。
作为蓄热件7的具有蓄热性的主体部分的材质,能够列举玻璃、聚酰亚胺等,从具有适度的蓄热性且耐热性高的观点而言,优选聚酰亚胺等。蓄热件7既可以为单层构造的片,也可以为包括相同或不同的材质的2个以上的片等的层叠体。
此外,蓄热件7优选具有相对于在第一辊31的轴长方向上较长的形状的超声波变幅杆42的前端面、在相同方向上较长的形状。此外,从防止超声波施加时的勾挂的观点而言,蓄热件7优选如图7所示,除了覆盖超声波变幅杆42的前端面的部分以外,还具有覆盖超声波变幅杆42的前端面42t的片行进方向上游侧(图7中左侧)的角部42a的部分,此外,优选具有覆盖超声波变幅杆42的前端面42t的片行进方向下游侧(图7中右侧)的角部42b的部分。
用于蓄热件7的主体部分的聚酰亚胺优选耐磨损性和耐热性优异,而且是合成树脂且具有受到超声波振动而其本身也发热的性能。
从相同的观点而言,蓄热件7的主体部分、图8(a)所示的超声波变幅杆42所设置的合成树脂层42h优选包括聚酰亚胺、聚苯并咪唑、聚醚乙基酮、聚苯硫醚、聚醚酰亚胺、聚酰胺酰亚胺等洛氏硬度为R120以上且R140以下、耐热温度为150℃以上且500℃以下的合成树脂,更优选包括聚酰亚胺、聚苯并咪唑等洛氏硬度为R125以上且R140以下、耐热温度为280℃以上且400℃以下的合成树脂。
此处,洛氏硬度是根据ASTM D785测量出的值,耐热温度是根据ASTM D648测量出的值。
设置在超声波变幅杆42的前端部的合成树脂层的耐热温度优选为150℃以上,更优选为280℃以上,此外,优选为500℃以下,更优选为400℃以下,此外,优选为150℃以上且500℃以下,更优选为280℃以上且400℃以下。
设置在超声波变幅杆42的前端部的合成树脂层的洛氏硬度优选为R120以上,更优选为R125以上,此外,优选为R140以下,此外,优选为R120以上且R140以下,更优选为R125以上且R140以下。
图8(a)是表示在前端部设置有蓄热件7的超声波变幅杆42的另一例的图。在图8(a)中,圆C2部分是圆C1部分的放大截面图。
在图8(a)所示的超声波变幅杆42中,如图8(b)所示,在包括铝合金、钛合金等金属的超声波变幅杆42的主体部分42c的前端面42t,通过熔射形成具有从一个面42d到内部的空隙42e的连接层42f之后,如图8(a)所示,在该连接层42f的所述一个面42d侧,固定有作为具有蓄热性的部件的合成树脂层42h。所谓熔射是指使通过进行加热而熔融或接近熔融的状态的金属或陶瓷等熔射材料的颗粒加速而以高速与基材面碰撞,在该基材面形成覆膜的表面处理法。在包括钛合金等金属的超声波变幅杆42的主体部分42c的前端面42t,隔着通过熔射形成的连接层42f,设置具有蓄热性的合成树脂层42h,由此,作为具有蓄热性的合成树脂层42h的材料,耐磨损性和耐热性等优异,而且在使用直接固定时不易获得充分的固定强度的聚酰亚胺等合成树脂时,也能够容易地获得充分的固定强度。另外,若固定强度不充分,则在复合片10的制造中,容易产生合成树脂层42h剥离等不良情况。
作为用于形成连接层42f的熔射材料,能够无特别限制地使用能够熔射、且能够有助于提高具有蓄热性的合成树脂层42h的固定强度的材料,但从相对于包括钛合金等金属的超声波变幅杆42的主体部分42c的结合力优异、耐磨损性和耐热性也优异的观点而言,优选使用碳化钨、氧化锆、碳化铬等陶瓷、铝镁、锌铝等合金、铝、不锈钢、钛、钼等金属、作为金属与陶瓷的复合材的金属陶瓷等,从形成提高合成树脂层42h的固定强度的空隙42e的观点而言,更优选使用陶瓷,进而优选使用碳化钨。
此外,从提高合成树脂层42h的固定强度的观点而言,优选连接层42f的形成材料与构成具有蓄热性的合成树脂层42h的合成树脂相比熔点较高,且在形成合成树脂42h时维持空隙42e的形状。
作为将具有蓄热性的合成树脂层42h固定在连接层42f的方法,能够列举:将连接层42f浸渍在通过加热而熔融的合成树脂的方法;将通过加热而熔融的合成树脂涂敷于连接层42f的方法;将软化后的合成树脂的板状体压抵于连接层42f的方法等。
连接层42f的厚度Tf〔参照图8(a)〕无特别限制,列举一例,优选为10μm以上,更优选为20μm以上,此外,优选为100μm以下,更优选为50μm以下,此外,优选为10μm以上且100μm以下,更优选为20μm以上且50μm以下。
具有蓄热性的合成树脂层42h的厚度Th〔参照图8(a)〕无特别限制,列举一例,优选为5μm以上,更优选为10μm以上,此外,优选为100μm以下,更优选为50μm以下,此外,优选为5μm以上且100μm以下,更优选为10μm以上且50μm以下。
此外,连接层42f的厚度Tf相对于该厚度Tf和合成树脂层42h的厚度Th的合计厚度Tt的比率,从维持合成树脂的固定强度且不阻碍超声波振动和发热的观点而言,优选为30%以上,更优选为50%以上,此外,优选为85%以下,更优选为75%以下,此外,优选为30%以上且85%以下,更优选为50%以上且75%以下。
如第三实施方式那样具有蓄热件7的复合片的制造装置,也可以具有第一实施方式的复合片的制造装置所具有的预热机构6、第二实施方式的复合片的制造装置所具有的加热超声波变幅杆42的机构。
在上述各实施方式中制造的复合片10优选具有以下的结构。
凸部5的高度H(参照图1)为1~10mm,特别优选为3~6mm。复合片10的每单位面积(1cm2)的凸部5的数量为1~20个,特别优选为6~15个。凸部5的X方向的底部尺寸A(参照图1)为0.5~5.0mm,特别优选为1.0~4.0mm。凸部5的Y方向的底部尺寸B(参照图1)为1.0~10mm,特别优选为2.0~7.0mm。
X方向的底部尺寸A与Y方向的底部尺寸B的比(底部尺寸A:底部尺寸B)为1:1~1:10,特别优选为1:2~2:5。凸部5的底部面积(底部尺寸A×底部尺寸B)为0.5~50mm2,特别优选为2~20mm2。
熔接部4中,X方向的尺寸C(参照图1)为0.5~2mm,特别优选为0.8~1.5mm,Y方向的尺寸D(参照图1)为1.0~5.0mm,特别优选为1.2~3.0mm。X方向的尺寸C与Y方向的尺寸D的比(尺寸C:尺寸D)为1:1~1:3,特别优选为2:3~2:5。
熔接部4的比外周缘靠内侧的部分的面积优选为0.5mm2以上,更优选为1.0mm2以上,此外,优选为5.0mm2以下,更优选为4.0mm2以下,此外,优选为0.5mm2以上且5.0mm2以下,更优选为1.0mm2以上且4.0mm2以下。熔接部4的比外周缘靠内侧的部分的面积也包含贯通孔14的面积。
贯通孔14的开口面积相对于熔接部4的比外周缘靠内侧的部分的面积,优选为50%以上,更优选为80%以上,此外,优选为低于100%,更优选为95%以下,此外,优选为50%以上且低于100%,更优选为80%以上且95%以下。
上述复合片10优选用作一次性尿布、经期卫生巾、卫生护垫、失禁护垫等吸收性物品的正面片。
此外,也能够使用在吸收性物品的正面片以外的用途。
例如,作为吸收性物品用的片,能够使用在配置在正面片与吸收体之间的片、立体褶皱(防漏壁)形成用的片(尤其是形成褶皱的内壁的片)等,此外,作为吸收性物品以外的用途,能够用作清扫片尤其是以液体吸收为主的清扫片、对人用的化妆片等。在用于清扫片时,在凸部中,对不平滑的被清扫面的追随性良好,因此优选将第一无纺布侧朝向被清扫面使用。在用作化妆片时,在凸部追随对象者的肌肤,还体现按摩效果,并且能够进行多余的化妆剂(另外使用)或汗的吸收,因此优选将第一无纺布侧朝向肌肤侧使用。
本发明的复合片的制造方法和制造装置不受上述实施方式任何限制,能够适当变更。
例如,上述复合片10在各个凹部形成有一个熔接部,但在本发明中制造的复合片也可以在一个凹部包含多个熔接部。此外,复合片10的凸部5为四角锥台形状,但也可以为半球状等。此外,彼此邻接的排中的凸部5和熔接部4分别在X方向上错开的程度可以代替1/2节距,而为1/3节距、1/4节距等,还可以不在X方向上错开。
此外,熔接部和贯通孔的俯视形状能够为椭圆形、圆形、使角部为圆角的多边形(正方形、长方形、三角形、菱形等)等。
此外,制造的复合片10既可以按日本专利特开2016-116582的图4或图5所示的方式形成有凸部和熔接部,也可以按日本专利特开2016-116583号公报的图3所示的方式形成有凸部和熔接部。此外,也可以代替使存在于复合片的熔接部全部为具有贯通孔的熔接部的结构,而使存在于复合片的熔接部中的一部分为具有贯通孔的熔接部。例如,也能够对带状的复合片的宽度方向的中央区域中的第一和第二片的一者或两者进行预热,形成具有贯通孔的熔接部,而不对隔着中央区域的侧区域中的第一和第二片两者进行预热,形成不具有贯通孔的熔接部。
关于所述本发明的实施方式(形态),进一步记载以下的复合片的制造方法和复合片的制造装置。
<1>
一种复合片的制造方法,该复合片具有第一片和第二片熔接而得的多个熔接部,且所述第一片中的除所述熔接部以外的部分的至少一部分形成有向所述第二片侧的相反侧突出的凸部,该复合片的制造方法包括:
赋形工序,其一边使在周面部具有彼此啮合的凹凸的第一辊和第二辊旋转,一边将所述第一片导入至该两个辊的啮合部,从而使其变形为凹凸形状;重叠工序,其将变形为凹凸形状的所述第一片保持在所述第一辊上进行输送,且使所述第二片重叠于输送中的所述第一片;和超声波处理工序,其将重叠后的两个片夹在所述第一辊的凸部与超声波熔接机的超声波变幅杆之间而施加超声波振动,
在所述超声波处理工序中,在施加该超声波振动时,形成具有贯通孔的所述熔接部。
<2>
如所述<1>记载的复合片的制造方法,其中,将所述超声波变幅杆加热至规定温度,在所述超声波处理工序中,与所述超声波振动的施加一起加热所述第一片和所述第二片的至少一者。
<3>
如所述<1>或<2>记载的复合片的制造方法,其中,将所述第一辊加热至规定温度,在施加所述超声波振动之前,预先加热所述第一片和所述第二片的至少一者。
<4>
如所述<1>至<3>中任一项记载的复合片的制造方法,其中,在施加所述超声波振动之前,将所述第一片和所述第二片的至少一者直接预先加热至规定温度。
<5>
如所述<2>至<4>中任一项记载的复合片的制造方法,其中,规定温度低于加热的所述第一片或所述第二片的熔点、且为比该熔点低50℃的温度以上。
<6>
如所述<1>至<5>中任一项记载的复合片的制造方法,其中,在所述超声波处理工序中,在所述超声波变幅杆的前端部配置有具有蓄热性的部件的状态下进行所述超声波振动的施加,在施加该超声波振动时,形成具有贯通孔的所述熔接部。
<7>
如所述<6>记载的复合片的制造方法,其中,所述具有蓄热性的部件与构成所述超声波变幅杆的材料相比,热导率较低。
<8>
如所述<6>或<7>记载的复合片的制造方法,其中,所述具有蓄热性的部件的热导率为2.0W/mK以下,优选为1.0W/mK以下,此外,为0.1W/mK以上,优选为0.5W/mK以上,此外,为0.1W/mK以上且2.0W/mK以下,优选为0.5W/mK以上且1.0W/mK以下。
<9>
如所述<6>至<8>中任一项记载的复合片的制造方法,其中,
所述具有蓄热性的部件具有耐热性,
所述具有蓄热性的部件的耐热温度为150℃以上,优选为200℃以上,更优选为250℃以上,所述具有蓄热性的部件的耐热温度的上限为1500℃以下。
<10>
如所述<6>至<9>中任一项记载的复合片的制造方法,其中,所述具有蓄热性的部件的材料为玻璃或聚酰亚胺。
<11>
如所述<6>至<10>中任一项记载的复合片的制造方法,其中,所述具有蓄热性的部件除了覆盖所述超声波变幅杆的前端面的部分以外,还具有覆盖该超声波变幅杆的前端面的片行进方向上游侧的角部的部分。
<12>
如所述<11>记载的复合片的制造方法,其中,所述具有蓄热性的部件还具有覆盖所述超声波变幅杆的前端面的片行进方向下游侧的角部的部分。
<13>
如所述<1>至<12>中任一项记载的复合片的制造方法,其中,所述第一片和所述第二片由于被夹在所述第一辊的凸部的前端面与所述超声波变幅杆的前端面之间而被施加的加压力为10N/mm以上,优选为15N/mm以上,此外,为150N/mm以下,优选为120N/mm以下,此外,为10N/mm以上且150N/mm以下,优选为15N/mm以上且120N/mm以下。
<14>
如所述<1>至<13>中任一项记载的复合片的制造方法,其中,施加的所述超声波振动的频率为15kHz以上,优选为20kHz以上,此外,为50kHz以下,优选为40kHz以下,此外,为15kHz以上且50kHz以下,优选为20kHz以上且40kHz以下。
<15>
如所述<1>至<14>中任一项记载的复合片的制造方法,其中,施加的所述超声波振动的振幅为20μm以上,优选为25μm以上,此外,为50μm以下,优选为40μm以下,此外,为20μm以上且50μm以下,优选为25μm以上且40μm以下。
<16>
如所述<1>至<15>中任一项记载的复合片的制造方法,其中,所述复合片用作一次性尿布、经期卫生巾、卫生护垫、失禁护垫等吸收性物品的正面片。
<17>
一种复合片的制造装置,该复合片具有第一片和第二片熔接而得的多个熔接部,且所述第一片中的除所述熔接部以外的部分的至少一部分形成向所述第二片侧的相反侧突出的凸部,该复合片的制造装置包括:
凹凸赋形部,其具有在周面部具有彼此啮合的凹凸的第一辊和第二辊,且使导入至该两个辊的啮合部的所述第一片变形为凹凸形状;和超声波处理部,其包括超声波熔接机,在使所述第二片重叠在变形为凹凸形状的状态的所述第一片上之后,将该两个片夹在所述第一辊的凸部与所述超声波熔接机的超声波变幅杆之间而局部地施加超声波振动,形成具有贯通孔的所述熔接部。
<18>
如所述<17>记载的复合片的制造装置,其包括加热所述超声波变幅杆的机构。
<19>
如所述<17>或<18>记载的复合片的制造装置,其包括预热机构,该预热机构将施加所述超声波振动之前的所述第一片和所述第二片的至少一者预热至规定温度。
<20>
如所述<19>记载的复合片的制造装置,其中,所述预热机构是配置在所述第一辊内的加热器。
<21>
如所述<19>或<20>记载的复合片的制造装置,其中,利用所述预热机构将所述第一片加热至低于该片的熔点、且比该熔点低50℃的温度以上的温度。
<22>
如所述<19>至<21>中任一项记载的复合片的制造装置,其中,利用所述预热机构预热至比所述第一片的熔点低20℃的温度以上、且比该熔点低5℃的温度以下的温度。
<23>
如所述<17>至<22>中任一项记载的复合片的制造装置,其中,在所述超声波变幅杆的前端部配置有具有蓄热性的部件。
<24>
如所述<23>记载的复合片的制造装置,其中,所述具有蓄热性的部件与构成所述超声波变幅杆的材料相比,热导率较低。
<25>
如所述<23>或<24>记载的复合片的制造装置,其中,所述具有蓄热性的部件的热导率为2.0W/mK以下,优选为1.0W/mK以下,此外,为0.1W/mK以上,优选为0.5W/mK以上,此外,为0.1W/mK以上且2.0W/mK以下,优选为0.5W/mK以上且1.0W/mK以下。
<26>
如所述<23>至<25>中任一项记载的复合片的制造装置,其中,
所述具有蓄热性的部件具有耐热性,
所述具有蓄热性的部件的耐热温度为150℃以上,优选为200℃以上,更优选为250℃以上,所述具有蓄热性的部件的耐热温度的上限为1500℃以下。
<27>
如所述<23>至<26>中任一项记载的复合片的制造装置,其中,所述具有蓄热性的部件除了覆盖所述超声波变幅杆的前端面的部分以外,还具有覆盖该超声波变幅杆的前端面的片行进方向上游侧的角部的部分。
<28>
如所述<27>记载的复合片的制造装置,其中,所述具有蓄热性的部件还具有覆盖所述超声波变幅杆的前端面的片行进方向下游侧的角部的部分。
<29>
如所述<23>至<28>中任一项记载的复合片的制造装置,其中所述具有蓄热性的部件的材料为玻璃或聚酰亚胺。
<30>
如所述<23>至<29>中任一项记载的复合片的制造装置,其中,在所述超声波变幅杆的前端部,作为具有蓄热性的部件设置有具有耐热性的合成树脂层。
<31>
如所述<30>记载的复合片的制造装置,其中,所述合成树脂层的耐热温度为150℃以上,优选为280℃以上,此外,为500℃以下,优选为400℃以下,此外,为150℃以上且500℃以下,优选为280℃以上且400℃以下。
<32>
如所述<23>至<31>中任一项记载的复合片的制造装置,其中,在所述超声波变幅杆的前端部,作为具有蓄热性的部件而设置有具有耐磨损性的合成树脂层。
<33>
如所述<32>记载的复合片的制造装置,其中,所述合成树脂层的洛氏硬度为R120以上,优选为R125以上,此外,为R140以下,此外,为R120以上且R140以下,优选为R125以上且R140以下。
<34>
如所述<30>至<33>中任一项记载的复合片的制造装置,其中,所述合成树脂层经由通过熔射形成的连接层固定在所述超声波变幅杆的包含金属的主体部分的前端面。
<35>
如所述<17>至<34>中任一项记载的复合片的制造装置,其中,所述第一片和所述第二片由于被夹在所述第一辊的凸部与所述超声波变幅杆之间而被施加的加压力为10N/mm以上,优选为15N/mm以上,此外,为150N/mm以下,优选为120N/mm以下,此外,为10N/mm以上且150N/mm以下,优选为15N/mm以上且120N/mm以下。
<36>
如所述<17>至<35>中任一项记载的复合片的制造装置,其中,施加的所述超声波振动的频率为15kHz以上,优选为20kHz以上,此外,为50kHz以下,优选为40kHz以下,此外,为15kHz以上且50kHz以下,优选为20kHz以上且40kHz以下。
<37>
如所述<17>至<36>中任一项记载的复合片的制造装置,其中,施加的所述超声波振动的振幅为20μm以上,优选为25μm以上,此外为50μm以下,优选为40m以下,此外,为20μm以上且50μm以下,优选为25μm以上且40μm以下。
<38>
如所述<17>至<37>中任一项记载的复合片的制造装置,其中,所述复合片用作一次性尿布、经期卫生巾、卫生护垫、失禁护垫等吸收性物品的正面片。
产业上的可利用性
根据本发明的复合片的制造方法,能够容易地形成具有贯通孔的熔接部,在熔接部的位置与贯通孔的位置之间不易产生错位,装置的维护负担也较小。
根据本发明的复合片的制造装置,能够容易地形成具有贯通孔的熔接部,在熔接部的位置与贯通孔的位置之间不易产生错位,装置的维护负担也较小。
Claims (38)
1.一种复合片的制造方法,该复合片具有第一片和第二片熔接而得的多个熔接部,且所述第一片中的除所述熔接部以外的部分的至少一部分形成有向所述第二片侧的相反侧突出的凸部,该复合片的制造方法的特征在于,包括:
赋形工序,其一边使在周面部具有彼此啮合的凹凸的第一辊和第二辊旋转,一边将所述第一片导入至该两个辊的啮合部,从而使其变形为凹凸形状;重叠工序,其将变形为凹凸形状的所述第一片保持在所述第一辊上进行输送,且使所述第二片重叠于输送中的所述第一片;和超声波处理工序,其将重叠后的两个片夹在所述第一辊的凸部与超声波熔接机的超声波变幅杆之间而施加超声波振动,
在所述超声波处理工序中,在施加该超声波振动时,形成具有贯通孔的所述熔接部。
2.如权利要求1所述的复合片的制造方法,其特征在于:
将所述超声波变幅杆加热至规定温度,在所述超声波处理工序中,与所述超声波振动的施加一起加热所述第一片和所述第二片的至少一者。
3.如权利要求1或2所述的复合片的制造方法,其特征在于:
将所述第一辊加热至规定温度,在施加所述超声波振动之前,预先加热所述第一片和所述第二片的至少一者。
4.如权利要求1~3中任一项所述的复合片的制造方法,其特征在于:
在施加所述超声波振动之前,将所述第一片和所述第二片的至少一者直接预先加热至规定温度。
5.如权利要求2~4中任一项所述的复合片的制造方法,其特征在于:
规定温度低于要加热的所述第一片或所述第二片的熔点、且为比该熔点低50℃的温度以上。
6.如权利要求1~5中任一项所述的复合片的制造方法,其特征在于:
在所述超声波处理工序中,在所述超声波变幅杆的前端部配置有具有蓄热性的部件的状态下进行所述超声波振动的施加,在施加该超声波振动时,形成具有贯通孔的所述熔接部。
7.如权利要求6所述的复合片的制造方法,其特征在于:
所述具有蓄热性的部件与构成所述超声波变幅杆的材料相比,热导率较低。
8.如权利要求6或7所述的复合片的制造方法,其特征在于:
所述具有蓄热性的部件的热导率为0.1W/mK以上且2.0W/mK以下。
9.如权利要求6~8中任一项所述的复合片的制造方法,其特征在于:
所述具有蓄热性的部件具有耐热性,
所述具有蓄热性的部件的耐热温度为150℃以上且1500℃以下。
10.如权利要求6~9中任一项所述的复合片的制造方法,其特征在于:
所述具有蓄热性的部件的材料为玻璃或聚酰亚胺。
11.如权利要求6~10中任一项所述的复合片的制造方法,其特征在于:
所述具有蓄热性的部件除了覆盖所述超声波变幅杆的前端面的部分以外,还具有覆盖该超声波变幅杆的前端面的片行进方向上游侧的角部的部分。
12.如权利要求11所述的复合片的制造方法,其特征在于:
所述具有蓄热性的部件还具有覆盖所述超声波变幅杆的前端面的片行进方向下游侧的角部的部分。
13.如权利要求1~12中任一项所述的复合片的制造方法,其特征在于:
所述第一片和所述第二片由于被夹在所述第一辊的凸部的前端面与所述超声波变幅杆的前端面之间而被施加的加压力为10N/mm以上且150N/mm以下。
14.如权利要求1~13中任一项所述的复合片的制造方法,其特征在于:
施加的所述超声波振动的频率为15kHz以上且50kHz以下。
15.如权利要求1~14中任一项所述的复合片的制造方法,其特征在于:
施加的所述超声波振动的振幅为20μm以上且50μm以下。
16.如权利要求1~15中任一项所述的复合片的制造方法,其特征在于:
所述复合片用作一次性尿布、经期卫生巾、卫生护垫、失禁护垫等吸收性物品的正面片。
17.一种复合片的制造装置,该复合片具有第一片和第二片熔接而得的多个熔接部,且所述第一片中的除所述熔接部以外的部分的至少一部分形成有向所述第二片侧的相反侧突出的凸部,该复合片的制造装置的特征在于,包括:
凹凸赋形部,其具有在周面部具有彼此啮合的凹凸的第一辊和第二辊,且使导入至该两个辊的啮合部的所述第一片变形为凹凸形状;和超声波处理部,其包括超声波熔接机,在使所述第二片重叠在变形为凹凸形状的状态的所述第一片上之后,将该两个片夹在所述第一辊的凸部与所述超声波熔接机的超声波变幅杆之间而局部地施加超声波振动,形成具有贯通孔的所述熔接部。
18.如权利要求17所述的复合片的制造装置,其特征在于:
包括加热所述超声波变幅杆的机构。
19.如权利要求17或18所述的复合片的制造装置,其特征在于:
包括预热机构,该预热机构将施加所述超声波振动之前的所述第一片和所述第二片的至少一者预热至规定温度。
20.如权利要求19所述的复合片的制造装置,其特征在于:
所述预热机构是配置在所述第一辊内的加热器。
21.如权利要求19或20所述的复合片的制造装置,其特征在于:
利用所述预热机构将所述第一片加热至低于该片的熔点、且比该熔点低50℃的温度以上的温度。
22.如权利要求19~21中任一项所述的复合片的制造装置,其特征在于:
利用所述预热机构预热至比所述第一片的熔点低20℃的温度以上、且比该熔点低5℃的温度以下的温度。
23.如权利要求17~22中任一项所述的复合片的制造装置,其特征在于:
在所述超声波变幅杆的前端部配置有具有蓄热性的部件。
24.如权利要求23所述的复合片的制造装置,其特征在于:
所述具有蓄热性的部件与构成所述超声波变幅杆的材料相比,热导率较低。
25.如权利要求23或24所述的复合片的制造装置,其特征在于:
所述具有蓄热性的部件的热导率为0.1W/mK以上且2.0W/mK以下。
26.如权利要求23~25中任一项所述的复合片的制造装置,其特征在于:
所述具有蓄热性的部件具有耐热性,
所述具有蓄热性的部件的耐热温度为150℃以上且1500℃以下。
27.如权利要求23~26中任一项所述的复合片的制造装置,其特征在于:
所述具有蓄热性的部件除了覆盖所述超声波变幅杆的前端面的部分以外,还具有覆盖该超声波变幅杆的前端面的片行进方向上游侧的角部的部分。
28.如权利要求27所述的复合片的制造装置,其特征在于:
所述具有蓄热性的部件还具有覆盖所述超声波变幅杆的前端面的片行进方向下游侧的角部的部分。
29.如权利要求23~28中任一项所述的复合片的制造装置,其特征在于:
所述具有蓄热性的部件的材料为玻璃或聚酰亚胺。
30.如权利要求23~28中任一项所述的复合片的制造装置,其特征在于:
在所述超声波变幅杆的前端部,作为具有蓄热性的部件设置有具有耐热性的合成树脂层。
31.如权利要求30所述的复合片的制造装置,其特征在于:
所述合成树脂层的耐热温度为150℃以上且500℃以下。
32.如权利要求23~31中任一项所述的复合片的制造装置,其特征在于:
在所述超声波变幅杆的前端部,作为具有蓄热性的部件设置有具有耐磨损性的合成树脂层。
33.如权利要求32所述的复合片的制造装置,其特征在于:
所述合成树脂层的洛氏硬度为R120以上且R140以下。
34.如权利要求30~33中任一项所述的复合片的制造装置,其特征在于:
所述合成树脂层经由通过熔射形成的连接层固定在所述超声波变幅杆的包含金属的主体部分的前端面。
35.如权利要求17~34中任一项所述的复合片的制造装置,其特征在于:
所述第一片和所述第二片由于被夹在所述第一辊的凸部与所述超声波变幅杆之间而被施加的加压力为10N/mm以上且150N/mm以下。
36.如权利要求17~35中任一项所述的复合片的制造装置,其特征在于:
施加的所述超声波振动的频率为15kHz以上且50kHz以下。
37.如权利要求17~36中任一项所述的复合片的制造装置,其特征在于:
施加的所述超声波振动的振幅为20μm以上且50μm以下。
38.如权利要求17~37中任一项所述的复合片的制造装置,其特征在于:
所述复合片用作一次性尿布、经期卫生巾、卫生护垫、失禁护垫等吸收性物品的正面片。
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CN114728475A (zh) * | 2019-11-19 | 2022-07-08 | 花王株式会社 | 复合片的制造方法和制造装置以及复合片和吸收性物品 |
CN115486991A (zh) * | 2021-06-17 | 2022-12-20 | 法麦凯尼柯数据股份公司 | 三维条带及用于制造三维条带的设备和方法 |
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JP7393903B2 (ja) * | 2019-09-26 | 2023-12-07 | 花王株式会社 | 開孔シートの製造方法及び開孔シートを構成部材として含む吸収性物品の製造方法 |
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JP7261212B2 (ja) * | 2020-11-16 | 2023-04-19 | 花王株式会社 | 複合シートの製造方法及び複合シートの製造装置 |
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