JP4610238B2 - 樹脂成形体の接合方法 - Google Patents
樹脂成形体の接合方法 Download PDFInfo
- Publication number
- JP4610238B2 JP4610238B2 JP2004182603A JP2004182603A JP4610238B2 JP 4610238 B2 JP4610238 B2 JP 4610238B2 JP 2004182603 A JP2004182603 A JP 2004182603A JP 2004182603 A JP2004182603 A JP 2004182603A JP 4610238 B2 JP4610238 B2 JP 4610238B2
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- JP
- Japan
- Prior art keywords
- molded body
- resin
- resin molded
- thermoplastic resin
- laser light
- 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.)
- Expired - Lifetime
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Images
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- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
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Description
第1樹脂成形体が、熱可塑性樹脂、及びαセルロースの含有率が80%以上であるセルロース繊維を含有するレーザー光透過性の成形体で、
第2樹脂成形体が、熱可塑性樹脂と着色料を含有するレーザー光吸収性の成形体であり、
第1樹脂成形体側からレーザー光を照射して、第1樹脂成形体と第2樹脂成形体とを溶着させる接合方法を提供する。
まず、接合対象となる第1樹脂成形体と第2樹脂成形体とを重ね合わせた後、クランプのような固定手段等により固定する。ここで、第1樹脂成形体と第2樹脂成形体との接触面の一部又は全部が溶着されて接合する部分となる。
85%以上のものであり、αセルロース80%未満のもの、例えば周知のケナフ繊維やジュート繊維では本発明の課題を解決することができない。
熱可塑性樹脂及びセルロース繊維を上記比率範囲で使用し(望ましくは予め予備混合する)、これらをヘンシェルミキサー(例えば、三井鉱山社製、ヒーター付き)に投入し、攪拌しながら加温する。このときの条件は次のとおりである。
1000〜3000gを投入し、使用した樹脂の溶融温度近傍にて、周速10〜50m/secで、10〜30分間混練する。
熱可塑性樹脂及びセルロース繊維を予備混合したもの50kgを、2軸高混練型押出機〔例えば、シーティーイー社製,HTM65,スクリュー径65mm、ホットカット(水中)カット付き〕に投入し、使用した樹脂の溶融温度近傍にて、スクリュー回転数200〜800r/mで溶融混練する。
次に、重ね合わせた第1樹脂成形体と第2樹脂成形体の接触部分に対して、第1樹脂成形体側からレーザー光を照射して、第1樹脂成形体と第2樹脂成形体とを、それらの接触面において溶着させる。
・ポリプロピレン:PM60A(サンアロマー社製)
・セルロース繊維:溶解パルプNDT-T(日本製紙社製)のシートを、シュレッダーを用いて5mm角のチップにしたものを用いた(平均繊維径20〜40μm,αセルロース含有量91%)。
・酸変性ポリプロピレン:ユーメックス1010(三洋化成工業社製)
(比較例で使用した原料)
・セルロース繊維1:ケナフ繊維(カット長5mmの繊維,αセルロース含有量約50%,ネイチャートラスト社製)
・セルロース繊維2:ジュート繊維(カット長3mmの繊維,αセルロース含有量約70%)
・カーボンブラック:商品名 A1−1000,DIC社製
(繊維の分散性の評価)
樹脂成形体の片面(面積50cm2)を、拡大鏡(10倍)を使用して、直径1mm以上の繊維塊(ホワイトスポット)の個数を数えた。また、同様にして、最大径(最大長さ)が1mm以上の繊維塊の個数(比較例2、3)も数えた。
成形体に対して垂直方向からレーザー光を照射(波長1064nm,YAGレーザー,出力1.5W)(レーザーマーカー,NEC製,マーカーエンジンSL475H)したときにおいて、成形体を通過したレーザー光と成形体を置かない場合のレーザー光をレーザーパワーメーター(COHERENT製,LASERMATE10)により受け、レーザーパワーメーターに連結したテスターにより電圧(V)を測定して、電圧をレーザー光の強度とし、下記式より求めた。
=〔成形体を透過したレーザー光の強度(V)/成形体に照射したレーザー光の強度(V)〕×100
(溶着強度)
溶着した試験片を用い、オリエンテック社製のテンシロンUCT-1Tで引張試験を行い、その最大点荷重(単位kg重)を測定した。なお、レーザー出力40W、60W、80Wについて測定した。
目視にて、溶着部付近を観察した。具体的には、レーザー照射時、樹脂又はセルロース繊維が分解してガスが発生し、固化したガス成分が溶着部付近に付着する現象が生じていないかどうかを観察した。
表1に示す成分(カーボンブラック以外は質量%表示で、カーボンブラックは他の成分の合計100質量部に対する質量部表示)を用いて、下記の方法により原料ペレットを得た。
方法1(ヘンシェルミキサーによる混合)
三井鉱山社製のヘンシェルミキサー(ヒーター付き,容量20L)に原料成分(第1樹脂成形体又は第2樹脂成形体の原料成分)を合計で2000g投入し、140℃に加温した状態で、3000r/mで20分間攪拌した。
原料成分(第1樹脂成形体又は第2樹脂成形体の原料成分)を均一に混合した後、50
kgを2軸高混練型押出機〔シーティーイー社製,HTM65,スクリュー径65mm、ホットカット(水中)カット付き〕に投入し、スクリュー回転数400r/mにて溶融コン混練後、押し出し、ペレット化した。
原料成分(第1樹脂成形体又は第2樹脂成形体の原料成分)を均一に混合した後、10
kgを2軸押出機〔日本製鋼所社製TEX30,スクリュー径30mm,ホットカット(水中)カット付き〕に投入し、スクリュー回転数400r/mにて溶融混練後、押し出し、ペレット化した。
次に、各原料ペレットを用い、80℃で4時間、熱風乾燥した後、射出成形(住友重機社製、SH100、シリンダー温度200℃)により、縦10cm、横5cm、厚み2mmの板状成形体(樹脂成形体1と樹脂成形体2)を得た。
第1樹脂成形体1と第2樹脂成形体2を図1に示すようにして組み合わせた状態で、クランプや支持部材(図示せず)で固定した後、接触部分に対して垂直方向(図中の矢印方向)より、ファインデバイス社製のレーザー溶着機FD200(半導体レーザー)を用い、10mm/secでレーザー光(出力40W、60W、80W)を照射した。レーザーのスポット径は0.6mmであり、レーザー光で直径1cmの円を描くように照射した。
2 熱可塑性樹脂成形体
Claims (7)
- レーザー溶着法を適用して2つの熱可塑性樹脂成形体を接合する方法であり、
第1樹脂成形体が、熱可塑性樹脂、及びαセルロースの含有率が80%以上であるセルロース繊維を含有するレーザー光透過性の成形体で、
第2樹脂成形体が、熱可塑性樹脂と着色料を含有するレーザー光吸収性の成形体であり、
第1樹脂成形体側からレーザー光を照射して、第1樹脂成形体と第2樹脂成形体とを溶着させる接合方法。 - 前記第1樹脂成形体に含まれるセルロース繊維が、αセルロースの含有率が85%以上のものである請求項1記載の接合方法。
- 少なくとも第1樹脂成形体が、熱可塑性樹脂とセルロース繊維を混合する際、セルロース繊維を解繊し、熱可塑性樹脂に分散させた後、成形して得られたものである請求項1又は2記載の接合方法。
- レーザー溶着法を適用して2つの熱可塑性樹脂成形体を接合する方法であり、
第1樹脂成形体が、熱可塑性樹脂、及びαセルロースの含有率が80%以上であるセルロース繊維を含有するレーザー光透過性の成形体で、
第2樹脂成形体が、熱可塑性樹脂と着色料を含有するレーザー光吸収性の成形体であり、
前記第1樹脂成形体が、熱可塑性樹脂、及びαセルロースの含有率が80%以上であるセルロース繊維を下記の方法1を適用して混合した後に成形されたものであり、
第1樹脂成形体側からレーザー光を照射して、第1樹脂成形体と第2樹脂成形体とを溶着させる接合方法。
(方法1)
混合槽容量20Lのヘンシェルミキサー内に、熱可塑性樹脂及びセルロース繊維の合計1000〜3000gを投入したとき、使用した樹脂の溶融温度近傍にて、周速10〜50m/secで、10〜30分間混練する。 - レーザー溶着法を適用して2つの熱可塑性樹脂成形体を接合する方法であり、
第1樹脂成形体が、熱可塑性樹脂、及びαセルロースの含有率が80%以上であるセルロース繊維を含有するレーザー光透過性の成形体で、
第2樹脂成形体が、熱可塑性樹脂と着色料を含有するレーザー光吸収性の成形体であり、
前記第1樹脂成形体が、熱可塑性樹脂、及びαセルロースの含有率が80%以上であるセルロース繊維を下記の方法2を適用して混合した後に成形されたものであり、
第1樹脂成形体側からレーザー光を照射して、第1樹脂成形体と第2樹脂成形体とを溶着させる接合方法。
(方法2)
熱可塑性樹脂及びセルロース繊維を予備混合したもの50kgを、2軸混練型押出機(スクリュー径65mm)に投入したとき、使用した樹脂の溶融温度近傍にて、スクリュー回転数200〜800r/mで溶融混練する。 - 第1樹脂成形体に含有されるセルロース繊維の平均繊維径が100μm以下である請求項1〜5のいずれか1項記載の接合方法。
- 第1樹脂成形体において、成形体表面の50cm2当たり、最大径又は最大長さが1mm以上の未解繊又は解繊されたセルロース繊維の塊の数が10個以下である請求項1〜6のいずれか1項に記載の接合方法。
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JP2004182603A JP4610238B2 (ja) | 2004-06-21 | 2004-06-21 | 樹脂成形体の接合方法 |
EP05253513A EP1609583A2 (en) | 2004-06-21 | 2005-06-08 | Resin molded body joining method |
US11/157,065 US7129439B2 (en) | 2004-06-21 | 2005-06-20 | Resin molded body joining method |
CNA2005100794045A CN1883925A (zh) | 2004-06-21 | 2005-06-21 | 树脂成形体的结合方法 |
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US20080191379A1 (en) * | 2007-02-12 | 2008-08-14 | Ford Global Technologies, Llc | Molded-in-color vehicle panel and mold |
US20080318051A1 (en) * | 2007-06-22 | 2008-12-25 | Ford Global Technologies, Llc | Molding system and molded-in-color panel |
US20080318052A1 (en) * | 2007-06-22 | 2008-12-25 | Ford Global Technologies, Llc | Molded-in-color panel and method for molding |
JP5051900B2 (ja) * | 2008-01-21 | 2012-10-17 | 日本アビオニクス株式会社 | 半導体レーザ溶着装置 |
JP2010083068A (ja) * | 2008-10-01 | 2010-04-15 | Polyplastics Co | 溶着構造、溶着体、及びクリープ破壊寿命向上方法 |
JP5677754B2 (ja) * | 2010-03-05 | 2015-02-25 | オリンパス株式会社 | セルロースナノファイバーとその製造方法、複合樹脂組成物、成形体 |
DE102011006803B4 (de) * | 2011-04-05 | 2013-10-02 | Max Schlatterer Gmbh & Co. Kg | Saugband zum Transportieren von Tabak |
WO2013136466A1 (ja) * | 2012-03-14 | 2013-09-19 | Ykk株式会社 | 身の回り品及びその成形方法 |
WO2014007382A1 (ja) * | 2012-07-05 | 2014-01-09 | 旭化成ケミカルズ株式会社 | 溶着方法及び溶着体 |
JP6073643B2 (ja) * | 2012-10-25 | 2017-02-01 | 株式会社小糸製作所 | 車両用ランプとその製造方法 |
DE112014000977B4 (de) * | 2013-03-25 | 2023-01-19 | Hitachi Astemo, Ltd. | Durchflusssensor |
JPWO2016063541A1 (ja) * | 2014-10-23 | 2017-08-03 | 株式会社カネカ | 熱伝導性樹脂と金属との複合部材 |
FR3050795B1 (fr) * | 2016-04-27 | 2019-11-29 | Valeo Iluminacion | Dispositif lumineux comprenant au moins deux parties soudees au laser |
JP6695648B2 (ja) * | 2017-09-15 | 2020-05-20 | 株式会社アシックス | 積層体、靴底及びシューズ |
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- 2005-06-08 EP EP05253513A patent/EP1609583A2/en not_active Withdrawn
- 2005-06-20 US US11/157,065 patent/US7129439B2/en not_active Expired - Fee Related
- 2005-06-21 CN CNA2005100794045A patent/CN1883925A/zh active Pending
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US20050279738A1 (en) | 2005-12-22 |
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