WO2018143274A1 - 樹脂成型品の接合方法 - Google Patents

樹脂成型品の接合方法 Download PDF

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Publication number
WO2018143274A1
WO2018143274A1 PCT/JP2018/003221 JP2018003221W WO2018143274A1 WO 2018143274 A1 WO2018143274 A1 WO 2018143274A1 JP 2018003221 W JP2018003221 W JP 2018003221W WO 2018143274 A1 WO2018143274 A1 WO 2018143274A1
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WO
WIPO (PCT)
Prior art keywords
molded product
resin
ultraviolet light
molded
vacuum ultraviolet
Prior art date
Application number
PCT/JP2018/003221
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English (en)
French (fr)
Japanese (ja)
Inventor
光宏 権田
Original Assignee
ポリプラスチックス株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ポリプラスチックス株式会社 filed Critical ポリプラスチックス株式会社
Priority to JP2018518546A priority Critical patent/JP6379323B1/ja
Priority to CN201880009965.3A priority patent/CN110248792A/zh
Publication of WO2018143274A1 publication Critical patent/WO2018143274A1/ja

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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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds

Definitions

  • the present invention relates to a method for joining resin molded products in which double molding is performed after irradiation with vacuum ultraviolet light.
  • resin molded products obtained by injection molding of thermoplastic resins have been used in various fields such as automobile parts, electrical / electronic equipment parts, and daily necessities.
  • Such a resin molded product may be used as a composite molded product in which a plurality of resin molded products are joined to each other for the purpose of forming a three-dimensional hollow body and simplifying the process during component assembly.
  • Patent Documents 1-4 and Non-Patent Document 1 techniques for processing and bonding resin molded products with vacuum ultraviolet light (VUV) are provided (see Patent Documents 1-4 and Non-Patent Document 1). According to this technique, it takes several minutes to several tens of minutes to join the resin molded product, but the deformation of the joined resin molded product is small.
  • Patent Documents 1 and 2 and Non-Patent Document 1 assume that the resin molded product is made of an amorphous resin such as polymethyl methacrylate (PMMA) resin or cyclic olefin resin, and the bonding strength is 1 MPa or less.
  • Patent Documents 3 and 4 assume silicone adhesion.
  • the double molding double shot ⁇ ⁇ molding
  • Resin molded products combining materials of different properties and materials of different colors are integrally molded by the double molding technology and used in various products.
  • an anchor such as a through hole or an undercut.
  • the present invention is proposed in view of the above-described circumstances, and is a composite in which high bonding strength can be obtained for a resin molded product produced using a resin composition while suppressing deformation of the resin molded product. It is an object of the present invention to provide a joining method for producing a molded product with high productivity and high degree of freedom of shape.
  • a method for joining resin molded products according to the present invention is a method for joining resin molded products made of a resin composition, and the second molded product on the surface of the first molded product Irradiate the region where bonding is planned with vacuum ultraviolet light, place the first molded product in a mold, and bond the second molded product to the region of the first molded product to be molded. Resin is injected into the mold.
  • the resin composition may contain a thermoplastic crystalline resin.
  • a composite molded product produced by double molding has a high bonding strength.
  • a resin molded product is produced by double molding, and a thermoplastic resin composition is assumed as the resin composition.
  • a thermoplastic resin composition is assumed as the resin composition.
  • a newly molded part will be referred to as a second molded product.
  • the thermoplastic resin composition is composed of a composition containing a thermoplastic crystalline resin and / or a thermoplastic amorphous resin.
  • a thermoplastic crystalline resin for example, polyoxymethylene (POM), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), or a liquid crystal polymer may be used.
  • the thermoplastic amorphous resin for example, polycarbonate (PC), cyclic polyolefin (COP), and cyclic polyolefin copolymer (COC) may be used.
  • Thermoplastic crystalline resins are generally opaque, but may be translucent or transparent for resins with low crystallinity.
  • the thermoplastic resin composition includes various fillers such as glass fibers, antioxidants and stabilizers, nucleating agents, lubricants, plasticizers, mold release agents, and colorants, which are generally added to the resin composition. Additives may be added.
  • the first molded product produced by primary molding of the resin composition is placed in the mold.
  • the second molded product is made of the resin composition so as to be in contact with the first molded product by secondary molding, and these are bonded to each other.
  • the first molded product and the second molded product include opposing surfaces joined to each other on the surface.
  • the molten resin composition forming the second molded product flows along the opposing surface in the first molded product, so that these opposing surfaces have corresponding shapes. Yes.
  • the opposing surface of the first molded product is substantially flat
  • the opposing surface of the second molded product is also substantially flat corresponding thereto.
  • the facing surface may be a surface having irregularities.
  • an uneven anchor on the opposing surface of the first molded product, an uneven anchor corresponding to that is also provided on the opposing surface of the second molded product, so that the first molded body and the second molded body are more You may enable it to join firmly.
  • FIG. 1 is a diagram schematically illustrating a series of steps of the present embodiment.
  • a first molded product 101 is prepared, and a vacuum ultraviolet light (VUV) is irradiated onto the irradiation surface 101 a of the first molded product 101 using a vacuum ultraviolet light irradiation device 20.
  • the first molded product 101 has an irradiation surface 101 a as an opposing surface to be joined to the second molded product 102.
  • vacuum ultraviolet light refers to light having a wavelength of 200 nm or less.
  • vacuum ultraviolet light does not necessarily have to be irradiated in a vacuum, but ultraviolet light in the wavelength region is largely absorbed by air, so when irradiated in air, the distance that the vacuum ultraviolet light propagates Need to be shortened.
  • the vacuum ultraviolet light irradiation device 20 includes a light source 21 such as an Xe excimer lamp, and a reflection plate 22 that reflects the light emitted from the light source 21 toward the irradiated object.
  • FIG. 2 is a photograph showing an example of a vacuum ultraviolet light irradiation apparatus. The vacuum ultraviolet light irradiation device shown in this photograph can irradiate ultraviolet light from the opening formed on the upper surface of the housing toward the upper part.
  • the first molded product 101 has a substantially flat irradiation surface 101a.
  • the vacuum ultraviolet light is irradiated from the vacuum ultraviolet light irradiation device 20 toward the irradiation surface 101a of the first molded product 101 for 2 minutes.
  • a treatment layer 111 in which the properties of the resin composition have changed from the irradiation surface 101a to a predetermined depth is formed on the irradiation surface 101a of the first molded product 101.
  • the irradiation of the vacuum ultraviolet light onto the first molded product 101 can be appropriately set in consideration of the illuminance on the irradiated surface.
  • the irradiation time may be 2 minutes, for example, but is not limited to 2 minutes and exceeds 0 minutes to 15 minutes. It may be the following time. Moreover, the time of 30 seconds or more and 10 minutes or less (for example, 1 minute or more and 7 minutes or less) may be sufficient.
  • the bonding strength may be lowered. Therefore, the irradiation of the first molded product 101 with the vacuum ultraviolet light is performed within a predetermined time. It is preferable that
  • the illuminance changes depending on the irradiation distance (distance from the light source to the irradiation surface), the output of the irradiation device, etc. Therefore, the irradiation condition of the vacuum ultraviolet light is based on the irradiation energy amount obtained from the product of the illuminance and the irradiation time. You may decide to.
  • the irradiation energy amount may be at 0.1 J / cm 2 or more 10J / cm 2 or less, also 0.5 J / cm 2 or more 6J / cm 2 or less (e.g., 1 J / cm 2 or more 3J / cm 2 or less) It may be.
  • the irradiation time can be shortened, so that processing in a shorter time becomes possible.
  • uneven processing due to the influence of unevenness or warpage of the joint surface is likely to occur.
  • FIG. 1 (b) the first molded product 101 irradiated with vacuum ultraviolet light is placed in the cavity 31 of the mold 30.
  • FIG. 1B and FIG. 1C described later are cross-sectional views for explaining the inside of the mold 30.
  • the irradiation surface 101 a that is scheduled to be bonded to the second molded product 102 in the first molded product 101 is exposed in the cavity 31 so as to be able to contact the resin composition injected into the cavity 31.
  • the operation of installing the first molded product 101 in the cavity 31 of the mold 30 is a step of irradiating the first molded product 101 with vacuum ultraviolet light (FIG. 1A ))), And as short as possible (preferably within 30 days, more preferably within 20 days, particularly preferably within 10 days).
  • a fluid of a resin composition heated and pressurized through the injection hole 32 is injected into the cavity 31 of the mold 30, and the second molded product 102 is integrated with the first molded product 101. Secondary molding is performed so as to be molded. The second molded product 102 contacts and is joined to the irradiation surface 101a of the first molded product 101.
  • the first molded product 101 and the second molded product that are finally molded integrally. 102 is removed from the mold.
  • the first molded product 101 and the second molded product 102 are joined to the opposing surface of the second molded product 102 via a treatment layer 111 formed to a predetermined depth on the irradiation surface 101a of the first molded product 101.
  • the first molded product 101 and the second molded product 102 are connected as a single body to form a single composite molded product (for example, a three-dimensional hollow body).
  • the treatment layer 111 of the first molded product 101 activated by vacuum ultraviolet light is fused by the fluidized resin composition of the second molded product 102. It is what is done. Therefore, the connection between the first molded product 101 and the second molded product 102 is mechanically robust and chemically stable.
  • the processing layer 111 is formed on the first molded product 101 by primary molding, and the second molded product 102 is connected to the first molded product 101 via the processing layer 111 by secondary molding. Therefore, since the joining itself is performed in the mold, the deformation due to the joining is small and no burrs are generated.
  • thermoplastic resin composition containing a thermoplastic crystalline resin and / or a thermoplastic amorphous resin can be used as the resin composition.
  • Thermoplastic crystalline resins include polyoxymethylene (POM), polybutylene terephthalate (PBT) resin, polyethylene terephthalate (PET) resin, polyphenylene sulfide (PPS) resin, and liquid crystal polymer having robust and stable properties.
  • a plastic crystalline resin can be used, and polycarbonate (PC), cyclic polyolefin (COP), and cyclic polyolefin copolymer (COC) can be used as the thermoplastic amorphous resin.
  • the thermoplastic crystalline resin can be used for producing a resin molded product to which a large mechanical stress is applied over a long period of time.
  • FIG. 3 is a photograph showing a composite molded product.
  • a first molded product of 64 ⁇ 12.7 ⁇ 6.4 mm is manufactured from a black resin composition by primary molding, and a surface of 12.7 ⁇ 6.4 mm, which is one end surface, is formed.
  • a white resin composition is injected into the remaining 63 ⁇ 12.7 ⁇ 6.4 mm space by secondary molding.
  • a second molded product joined to the end surface of the first molded product having a size of 12.7 ⁇ 6.4 mm was formed to produce a composite molded product.
  • the composite molded product was produced with a resin composition of non-reinforced PBT resin that does not contain an elastomer or a reactive compound (PBT resin Juranex (registered trademark) 2002, manufactured by Wintech Polymer Co., Ltd.).
  • FIG. 4 is a graph showing the relationship between the processing conditions of the bonded portion of the first molded product and the bonding strength. This graph shows the result of measuring the bonding strength with a tensile tester in accordance with ISO527-1, 2 using a composite molded product bonded by double molding according to the process described in FIG.
  • VUV vacuum ultraviolet light
  • UV ultraviolet light
  • the first molded product is bonded instead of the vacuum ultraviolet light irradiation.
  • uneven anchors were provided on the surface was shown. Note that irradiation with vacuum ultraviolet light (VUV) and ultraviolet light (UV) was performed for 7 minutes at an illuminance of 6 mW / cm 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
PCT/JP2018/003221 2017-02-03 2018-01-31 樹脂成型品の接合方法 WO2018143274A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018518546A JP6379323B1 (ja) 2017-02-03 2018-01-31 樹脂成型品の接合方法
CN201880009965.3A CN110248792A (zh) 2017-02-03 2018-01-31 树脂成型品的接合方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017018594 2017-02-03
JP2017-018594 2017-02-03

Publications (1)

Publication Number Publication Date
WO2018143274A1 true WO2018143274A1 (ja) 2018-08-09

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Country Status (3)

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JP (1) JP6379323B1 (zh)
CN (1) CN110248792A (zh)
WO (1) WO2018143274A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001170955A (ja) * 1999-12-17 2001-06-26 Olympus Optical Co Ltd 射出成形方法及び射出成形装置並びにプラスチック材料の清浄化方法
JP2006187730A (ja) * 2005-01-06 2006-07-20 Nippon Filcon Co Ltd 樹脂製微小流路化学デバイスの製造方法並びに該製法により製造された樹脂製微小流路化学デバイス構造体
JP2008019348A (ja) * 2006-07-13 2008-01-31 Kyoto Univ 光照射による樹脂の接着方法および樹脂物品の製造方法
WO2012144408A1 (ja) * 2011-04-20 2012-10-26 ウシオ電機株式会社 ワークの貼り合わせ方法および貼り合わせ装置
JP2015051542A (ja) * 2013-09-05 2015-03-19 独立行政法人物質・材料研究機構 接合方法、及び接合装置
WO2015152364A1 (ja) * 2014-04-04 2015-10-08 アルプス電気株式会社 電子部品の製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012232446A (ja) * 2011-04-28 2012-11-29 Dainippon Printing Co Ltd 積層体およびその製造方法
JP2013056517A (ja) * 2011-09-09 2013-03-28 Polyplastics Co 樹脂複合成形体の製造方法、及び樹脂複合成形体
WO2014013697A1 (ja) * 2012-07-16 2014-01-23 株式会社デンソー 電子装置およびその製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001170955A (ja) * 1999-12-17 2001-06-26 Olympus Optical Co Ltd 射出成形方法及び射出成形装置並びにプラスチック材料の清浄化方法
JP2006187730A (ja) * 2005-01-06 2006-07-20 Nippon Filcon Co Ltd 樹脂製微小流路化学デバイスの製造方法並びに該製法により製造された樹脂製微小流路化学デバイス構造体
JP2008019348A (ja) * 2006-07-13 2008-01-31 Kyoto Univ 光照射による樹脂の接着方法および樹脂物品の製造方法
WO2012144408A1 (ja) * 2011-04-20 2012-10-26 ウシオ電機株式会社 ワークの貼り合わせ方法および貼り合わせ装置
JP2015051542A (ja) * 2013-09-05 2015-03-19 独立行政法人物質・材料研究機構 接合方法、及び接合装置
WO2015152364A1 (ja) * 2014-04-04 2015-10-08 アルプス電気株式会社 電子部品の製造方法

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JPWO2018143274A1 (ja) 2019-02-14
CN110248792A (zh) 2019-09-17
JP6379323B1 (ja) 2018-08-22

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