JPS63312818A - Injection-molded product - Google Patents
Injection-molded productInfo
- Publication number
- JPS63312818A JPS63312818A JP62149134A JP14913487A JPS63312818A JP S63312818 A JPS63312818 A JP S63312818A JP 62149134 A JP62149134 A JP 62149134A JP 14913487 A JP14913487 A JP 14913487A JP S63312818 A JPS63312818 A JP S63312818A
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- molded product
- molded
- injection
- adhesive layer
- 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.)
- Pending
Links
- 239000012790 adhesive layer Substances 0.000 claims abstract description 10
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 229920001169 thermoplastic Polymers 0.000 claims description 7
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 abstract description 18
- 239000011347 resin Substances 0.000 abstract description 18
- -1 polypropylene Polymers 0.000 abstract description 14
- 239000004743 Polypropylene Substances 0.000 abstract description 7
- 229920001155 polypropylene Polymers 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000006698 induction Effects 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 description 30
- 230000001070 adhesive effect Effects 0.000 description 30
- 238000000034 method Methods 0.000 description 10
- 229920005992 thermoplastic resin Polymers 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 239000003086 colorant Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0097—Glues or adhesives, e.g. hot melts or thermofusible adhesives
Abstract
Description
【発明の詳細な説明】
（イ）発明の目的
「産業上の利用分野」
本発明は、熱可塑性樹脂からなる成型体であって、他の
物品等に表面に形成された熱可塑性接着剤で接着する様
に設計された成型体に関するもので、成型体の接着を極
めて容易になすことができ、熱可塑性樹脂成型体を使用
する各種産業、例えば自動車工業、弱電機器工業、家電
製品工業その他に巾広く利用できるものである。Detailed Description of the Invention (a) Purpose of the Invention "Field of Industrial Application" The present invention relates to a molded article made of a thermoplastic resin, and a thermoplastic adhesive formed on the surface of another article. This relates to a molded body designed to be bonded, and it is extremely easy to bond the molded body, and is suitable for various industries that use thermoplastic resin molded bodies, such as the automobile industry, light electrical equipment industry, home appliance industry, and others. It can be used widely.
特に、本発明の成型体は、接着すべき成型体と物品等（
以下これらを被着体という）の間に、接着剤を固体の状
態で配置し、高周波防電加熱や訪導加熱により接着剤を
溶融させてから被着体な密着させ、接着剤の冷却固化と
共に接着を完了させる、高周波加熱接着に適したもので
あり、その面からも各種産業に巾広く利用できるもので
ある。In particular, the molded body of the present invention can be bonded to a molded body to be bonded to an article, etc. (
Adhesive is placed in a solid state between the adherends (hereinafter referred to as adherends), and the adhesive is melted by high-frequency electrical insulation heating or conductive heating, and then brought into close contact with the adherends, and the adhesive is cooled and solidified. It is suitable for high-frequency heating bonding, which completes bonding at the same time, and from that point of view, it can be widely used in various industries.
「従来の技術」
熱可塑性接着剤を用いて被着体な接着する際には、まず
第一に接着剤を被着体の接着すべき面に固定する、即ち
一般に仮固定といわれている手段をとることが必要で、
従来、仮固定の方法として次のような方法が行なわれて
きた。"Prior Art" When bonding adherends using a thermoplastic adhesive, first of all, the adhesive is fixed to the surface of the adherend to be bonded, that is, a means generally referred to as temporary fixation. It is necessary to take
Conventionally, the following methods have been used for temporary fixation.
■ 接着剤を加熱し、溶融させた後、適当な塗布装置を
用いて被着体へ溶融状態で塗布する。(2) After the adhesive is heated and melted, it is applied in a molten state to the adherend using an appropriate application device.
■ 接着剤を押出成型または射出成型により、被着体の
接着すべき面の形状に応じてシート状、テープ状、リン
グ状等に加工し、被着体の上に置く。■ Process the adhesive into a sheet, tape, ring, etc. depending on the shape of the surface of the adherend by extrusion molding or injection molding, and place it on the adherend.
「発明が解決しようとする問題点」
従来性なわれてきた上記方法の５ち前記■の溶融塗布で
は次のような問題が存在した。``Problems to be Solved by the Invention'' The following problems existed in the conventional melt coating method (5) above.
■−１，溶融粘度の高い樹脂を主成分とする接着剤につ
いては適当な塗布装置がない。(1) There is no suitable coating device for adhesives whose main component is resin with high melt viscosity.
■−２被着体１個あるいは１カ所あたりへの塗布量およ
び塗布パターンの制御が困
難である。(2) It is difficult to control the amount and pattern of coating applied to each adherend or location.
また、■の方法には次のような問題が存在した。In addition, the method (■) had the following problems.
■−１，成型した接着剤を被着体の上に置き、接着する
までの過程において、接着剤
が所定の位置よりズレる、または、脱
落する可能性がある。(1) In the process of placing a molded adhesive on an adherend and adhering it, the adhesive may shift from a predetermined position or fall off.
■−λ 被着体の側面あるいは下面には接着剤が脱落す
るので配置できない。■-λ Cannot be placed on the side or bottom surface of the adherend because the adhesive will fall off.
本発明は、上記の問題点を解決するためになされたもの
である。The present invention has been made to solve the above problems.
（ロ）発明の構成
「問題点を解決するための手段」
本発明は一個の金型に対し、２台の射出機を用い２種類
の異なった熱可塑性樹脂を射出する、あるいは色の異な
る同じ種類の樹脂を射出することにより、種類の異なっ
た樹脂あるいは異なりた色の樹脂により一体成型を行な
うという、業界では「二色射出成型」と称されている方
法により接着剤と被着体が一体となった成型体を得るこ
とにより、上記の問題が解決し得ることを見出してなさ
れたものである。(b) Structure of the invention "Means for solving the problems" The present invention involves injecting two different types of thermoplastic resin into one mold using two injection machines, or injecting two different types of thermoplastic resin into one mold, or injecting the same mold with different colors. By injecting different types of resin, the adhesive and the adherend are integrally molded using a method called "two-color injection molding" in the industry, in which resins of different types or colors are integrally molded. This was done based on the discovery that the above problems could be solved by obtaining a molded product having the following properties.
すなわち、本発明は表面の一部に熱可塑性接着剤層を二
色射出成型により形成したことを特徴とする射出成型体
に関するものである。That is, the present invention relates to an injection molded article characterized in that a thermoplastic adhesive layer is formed on a part of the surface by two-color injection molding.
〇二色成形
二色成型の方法としては次の二通りの方法が主として用
いられている。〇Two-color molding The following two methods are mainly used for two-color molding.
■ １個の金型に対し、２台の射出機から同時に異なっ
た色あるいは異なった種類の熱可塑性樹脂のそれぞれ一
定量をそれぞれの金型射出口（ゲート）より射出し成型
する方法。■ A method in which two injection machines simultaneously inject a fixed amount of thermoplastic resin of different colors or types into one mold from each mold injection port (gate).
二種の樹脂の境界は、金型へのゲート取付位置および、
射出樹脂量等により一定の位置に制御可能である（混色
成型とも呼ばれることがある）。The boundary between the two types of resin is the gate installation position on the mold and
It can be controlled to a fixed position by adjusting the amount of injected resin (sometimes referred to as mixed color molding).
■ まず、第１の樹脂を金型に射出し、冷却固化させて
成型した後、金型の一部を移動させるか交換するかＫよ
り、新たな空間を作製し、その空間へ第２の樹脂を射出
して２種の樹脂により一体となった成型体を成形する方
法。■ First, the first resin is injected into a mold, cooled and solidified, and then molded. A new space is created by moving or replacing a part of the mold, and a second resin is inserted into that space. A method of injecting resin to form an integral molded body using two types of resin.
本発明は、２色以上の複数の成型機を用いる成型にも当
然適用可能である。The present invention is naturally applicable to molding using a plurality of molding machines for two or more colors.
０射出成型体
本発明で使用される射出成型体を構成する樹脂としては
、現在広く射出成型されている樹脂、例えばポリ塩化ビ
ニル、ポリエチレン、ポリプロピレン、ポリエチレンテ
レフタレート、ポリブチレンテレフタレート、ポリカー
ボネート、ナイロン、ポリメチルメタクリレート、ポリ
スチレン、ポリフェニレンオキサイド、ＡＢＳ等の樹脂
、あるいはこれらの樹脂にガラス繊維を添加した強化樹
脂、炭カル等の充填剤が多量に添加された樹脂等を挙げ
ることができ、それらの樹脂の一般的な射出成型方法及
び条件により本発明の成型体を得ることが出来る。0 Injection molded body The resins constituting the injection molded body used in the present invention include resins that are currently widely injection molded, such as polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, nylon, and polyethylene terephthalate. Examples include resins such as methyl methacrylate, polystyrene, polyphenylene oxide, and ABS, reinforced resins made by adding glass fiber to these resins, and resins to which large amounts of fillers such as charcoal are added. The molded article of the present invention can be obtained using a general injection molding method and conditions.
０熱可塑性液着剤
本発明に用いられる接着剤としては、熱可塑性を有する
ものであれば、特に制限されることなく挙げることがで
きる。好ましい接着剤としては、ポリエステル、エチレ
ン−酢酸ビニル共重合体、ポリオレフィン等を主成分と
するホットメルト接着剤と云われているものである。さ
らに好ましいものは、特開昭６０−１３０６６４号公報
等に開示されている高周波誘導により加熱接着を行なう
電磁誘導接着に用いられる熱可塑性樹脂に磁性または導
電性の金属粉を分散させた接着剤であり、この場合の熱
可塑性樹脂としては、ポリエチレン、ポリプロピレン、
ポリエチレンテレフタレート、ポリブチレンテレフタレ
ート、ポリカーボネート、ナイロン、ＡＢＳ等が挙げら
れ、金属粉としては、鉄、ニッケル、アルミニウム、銅
等の金属の粉末や短繊維が挙げられる。0 Thermoplastic Liquid Adhesive The adhesive used in the present invention is not particularly limited as long as it has thermoplasticity. Preferred adhesives include hot melt adhesives containing polyester, ethylene-vinyl acetate copolymer, polyolefin, etc. as main components. More preferred is an adhesive in which magnetic or conductive metal powder is dispersed in a thermoplastic resin used in electromagnetic induction bonding, which performs heat bonding by high-frequency induction, as disclosed in JP-A-60-130664. Yes, the thermoplastic resin in this case is polyethylene, polypropylene,
Examples of the metal powder include polyethylene terephthalate, polybutylene terephthalate, polycarbonate, nylon, ABS, etc., and examples of the metal powder include powders and short fibers of metals such as iron, nickel, aluminum, and copper.
成型体の表面に形成される接着層の厚みは成形体の材質
、形状及び求められる接着強度などによって希望のもの
とすればよいが一般的には０．６〜１．０ｎ程度である
。The thickness of the adhesive layer formed on the surface of the molded body may be determined as desired depending on the material, shape, and required adhesive strength of the molded body, but is generally about 0.6 to 1.0 nm.
０使用方法
本発明による射出成型体は、接着剤が表面に形成された
ものであるため、接着に際しては、熱板、赤外線等によ
り接着剤を加熱溶融させた後、冷却固化する前に接着す
べき相手の被着体と圧着することにより接着体を得るこ
とができる。また電磁誘導加熱による場合は、接着剤の
内部発熱による加熱であるため、被着体と圧着しながら
の加熱も可能である。0 Usage method Since the injection molded product according to the present invention has an adhesive formed on its surface, the adhesive must be melted by heating using a hot plate, infrared rays, etc., and then bonded before being cooled and solidified. An adhesive body can be obtained by press-bonding it with the target adherend. Furthermore, in the case of electromagnetic induction heating, since the heating is performed by internal heat generation of the adhesive, it is possible to heat the adhesive while it is being press-bonded to the adherend.
「作 用」
本発明で成型体表面に形成された接着剤層は、金型と射
出成形機の選択によりその形状、大きさ及び重量が任意
に制御され得るものであるうえ、また接着剤層は、二色
成型により、成型されたものであるため、接着剤が溶融
状態の成型体を構成する樹脂と高圧で接触して行なわれ
るため、はとんど一体化し、密着は強固で確実であるた
め、前記した問題点をすべて解決するとい５優れた作用
を有するものである。"Function" The shape, size, and weight of the adhesive layer formed on the surface of the molded product according to the present invention can be arbitrarily controlled by selecting the mold and injection molding machine, and the adhesive layer Because it is molded using two-color molding, the adhesive is in contact with the molten resin that makes up the molded product under high pressure, so it is almost integrated and the adhesion is strong and reliable. Therefore, it has five excellent effects in solving all of the above-mentioned problems.
「実施例」
被着面に熱可塑性接着剤層を有する自動車用のドア内装
部品であるポリプロピレン製ブラケット（１）を二色射
出成型により製造した。ここで、接着剤としては、出光
石油化学■製ポリタックＭ−３００（酸変性ポリプロピ
レン）１００重撮部と８０メツシユパスのアトマイズ鉄
粉１５０重量部とを二軸押出機により、混練して得られ
たものを用い、ブラケット本体の樹脂には、メルトイン
デックス１５のポリプロピレンホモポリマーを用いた。"Example" A polypropylene bracket (1), which is an automobile door interior part and has a thermoplastic adhesive layer on the adhered surface, was manufactured by two-color injection molding. Here, the adhesive was obtained by kneading 100 weight parts of Polytack M-300 (acid-modified polypropylene) manufactured by Idemitsu Petrochemical ■ and 150 parts by weight of atomized iron powder of 80 mesh passes using a twin-screw extruder. A polypropylene homopolymer with a melt index of 15 was used as the resin for the bracket body.
このブラケット（１）は、木材の粉で強化したポリプロ
ピレン製の自動車用ドア内装材に高周波誘導（電磁誘導
）による接着剤の発熱を利用して接着することができた
。This bracket (1) was able to be adhered to an automobile door interior material made of polypropylene reinforced with wood powder by utilizing the heat generated by the adhesive due to high frequency induction (electromagnetic induction).
（ハ）発明の効果
本発明によれば、常温では固体の接着剤を精密にしかも
所定量を成型体の接着を必要とする面の所定の位置に固
定することが可能であり、また接着工程までの被着体の
搬送、移動に際してもその固定位置がズレないという優
れた特長を有し、また接着時に被着体の側面あるいは下
面に接着面が位置する場合においても接着剤を適用する
ことが可能であるという特長も有するため、自動車工業
１弱電機器工業等において巾広く利用されるため、本発
明が奏する効果は他に比較出来るものではない。(C) Effects of the Invention According to the present invention, it is possible to precisely fix a predetermined amount of adhesive, which is solid at room temperature, at a predetermined position on the surface of a molded body that requires adhesion, and also to reduce the adhesive process. It has an excellent feature that the fixed position does not shift even when the adherend is transported or moved, and the adhesive can be applied even when the adhesive surface is located on the side or bottom surface of the adherend during bonding. Since it also has the feature of being able to perform the following steps, it is widely used in the automobile industry, the electrical equipment industry, etc., and the effects of the present invention are incomparable to others.
第１図は本発明の一実施例である射出成型体くブランケ
ット）の斜視図であり、第２図は当該成型体の断面図で
ある。１は射出成型体２は熱可塑性接着剤層を示す。FIG. 1 is a perspective view of an injection molded body (blanket) according to an embodiment of the present invention, and FIG. 2 is a sectional view of the molded body. 1 indicates an injection molded body 2 having a thermoplastic adhesive layer.
Claims (1)
り形成したことを特徴とする射出成型体。1. An injection molded article characterized in that a thermoplastic adhesive layer is formed on a part of the surface by two-color injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62149134A JPS63312818A (en) | 1987-06-17 | 1987-06-17 | Injection-molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62149134A JPS63312818A (en) | 1987-06-17 | 1987-06-17 | Injection-molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63312818A true JPS63312818A (en) | 1988-12-21 |
Family
ID=15468485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62149134A Pending JPS63312818A (en) | 1987-06-17 | 1987-06-17 | Injection-molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63312818A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021734A1 (en) * | 1994-02-09 | 1995-08-17 | Tetra Laval Holdings & Finance S.A. | Gluable plastic moulded part and process for producing the same |
| EP0767040A1 (en) * | 1995-10-02 | 1997-04-09 | Dow Corning Corporation | Substrates containing a molded adhesive layer and method for preparing same |
| WO2003061941A1 (en) * | 2002-01-22 | 2003-07-31 | Weidmann Plastics Technology Ag | Method for producing an adhesive moulded body, and a moulded body produced according to said method |
| WO2023127665A1 (en) * | 2021-12-27 | 2023-07-06 | 株式会社レゾナック | Joined body manufacturing method and base material manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61259944A (en) * | 1985-05-15 | 1986-11-18 | 東洋製罐株式会社 | Oriented multilayer plastic bottle and manufacture thereof |
-
1987
- 1987-06-17 JP JP62149134A patent/JPS63312818A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61259944A (en) * | 1985-05-15 | 1986-11-18 | 東洋製罐株式会社 | Oriented multilayer plastic bottle and manufacture thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021734A1 (en) * | 1994-02-09 | 1995-08-17 | Tetra Laval Holdings & Finance S.A. | Gluable plastic moulded part and process for producing the same |
| EP0767040A1 (en) * | 1995-10-02 | 1997-04-09 | Dow Corning Corporation | Substrates containing a molded adhesive layer and method for preparing same |
| WO2003061941A1 (en) * | 2002-01-22 | 2003-07-31 | Weidmann Plastics Technology Ag | Method for producing an adhesive moulded body, and a moulded body produced according to said method |
| US7591971B2 (en) | 2002-01-22 | 2009-09-22 | Weidmann Plastics Technology Ag | Method for producing an adhesive molded body |
| WO2023127665A1 (en) * | 2021-12-27 | 2023-07-06 | 株式会社レゾナック | Joined body manufacturing method and base material manufacturing method |
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