JPS62190233A - Production of injection molded thermoplastic resin article - Google Patents
Production of injection molded thermoplastic resin articleInfo
- Publication number
- JPS62190233A JPS62190233A JP3244586A JP3244586A JPS62190233A JP S62190233 A JPS62190233 A JP S62190233A JP 3244586 A JP3244586 A JP 3244586A JP 3244586 A JP3244586 A JP 3244586A JP S62190233 A JPS62190233 A JP S62190233A
- Authority
- JP
- Japan
- Prior art keywords
- injection molded
- thermoplastic resin
- birefringence
- molded product
- resin
- 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
- 239000007924 injection Substances 0.000 title claims abstract description 48
- 238000002347 injection Methods 0.000 title claims abstract description 48
- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 230000001678 irradiating effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 229920005989 resin Polymers 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 10
- 239000004431 polycarbonate resin Substances 0.000 abstract description 8
- 230000003287 optical effect Effects 0.000 abstract description 7
- 229920005668 polycarbonate resin Polymers 0.000 abstract description 7
- 238000003754 machining Methods 0.000 abstract description 3
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 238000009966 trimming Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229920000402 bisphenol A polycarbonate polymer Polymers 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0838—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using laser
-
- 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
- B29C2045/0075—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping curing or polymerising by irradiation
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2017/00—Carriers for sound or information
- B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
- B29L2017/003—Records or discs
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、熱可塑性樹脂射出成形品の製造方法に係り
、特に、高密度の情報記録ディスク等光学用成形品の製
造に好適なものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing thermoplastic resin injection molded products, and is particularly suitable for manufacturing optical molded products such as high-density information recording disks. be.
従来、デジタルオーディオディスク、ビデオディスク、
メモリーディスク等の円板状記録基板やプラスチックレ
ンズ等光学用品等は、その素材、形状等から、生産性に
優れた射出成形法（射出圧縮成形法をも含む概念とする
。）により製造されている。Traditionally, digital audio discs, video discs,
Disc-shaped recording substrates such as memory disks and optical supplies such as plastic lenses are manufactured using injection molding methods (this concept also includes injection compression molding methods), which is highly productive due to their materials and shapes. There is.
これら円板状記録基板や光学用品の素材としては、アク
リル樹脂、ポリカーボネート樹脂等々が採用されている
が、取り分は衝撃強度、寸法安定性等の物理的特性、吸
湿性、寸法変化等の化学特性、透明性、複屈折等の光学
特性等を含む総合的特性からポリカーボネート樹脂が広
く採用されている。ところで、それら素材、特に、ポリ
カーボネート樹脂は、例えば、アクリル樹脂等の他の樹
脂に比べて、射出成形による成形品の複屈折が大きく、
しかも径方向に不均一となり易く、これらは経時的変化
の原因ともなっていた。Acrylic resin, polycarbonate resin, etc. are used as materials for these disc-shaped recording substrates and optical products, but the main focus is on physical properties such as impact strength and dimensional stability, and chemical properties such as hygroscopicity and dimensional change. Polycarbonate resin is widely used because of its comprehensive properties including optical properties such as transparency, birefringence, etc. By the way, these materials, especially polycarbonate resin, have a higher birefringence in injection molded products than other resins such as acrylic resin.
Moreover, it tends to become non-uniform in the radial direction, which causes changes over time.
かかる、射出成形品の複屈折は、例えば、高密度情報記
録ディスクから発光器、ビームスプリフタ、コリメータ
レンズ、受光器等からなる検出装置によってその情報を
読み取る場合に重要なファクターとなり、複屈折率が高
いと読取分解能が低下するばかりかノイズ問題も含み読
取不能という事態も招いた。またそのように高くなくと
も当該検出装置の構成によっては発光器からの照射光の
数％の光量が発光器に逆戻りするいわゆるバンクトーク
問題を引き起こすという原因ともなっている。これがた
め、複屈折の小さいがっ均一な射出成形による製造方法
の開発が強く望まれている。Such birefringence of injection molded products is an important factor when, for example, information is read from a high-density information recording disk by a detection device consisting of a light emitter, a beam splitter, a collimator lens, a light receiver, etc. A high value not only lowers the reading resolution but also causes noise problems, leading to situations where reading is impossible. Furthermore, even if it is not so high, depending on the configuration of the detection device, a few percent of the amount of light emitted from the light emitter may return to the light emitter, causing a so-called bank talk problem. For this reason, there is a strong desire to develop a manufacturing method using injection molding that has low but uniform birefringence.
ところで、従来の熱可塑性樹脂の射出成形品の製造方法
は、固定金型と可動金型とを組み合わせて形成する扁平
なキャビティに溶融樹脂を射出して一体的に成形し硬化
前にゲートカットを行い、あるいはその後中心部等に機
械加工を施し射出成形品を完成させていた。従って、射
出成形品の複屈折が分子の配向と残留応力を主な原因と
して発生すると観念されながらも上述射出成形方法、取
り分けその射出成形金型構造によって一義的に決定され
てしまうという考え方に基づき、従来は内周ゲート射出
方式、外周ゲート射出方式の方式選択、溶融樹脂の温度
、射出圧力などの成形条件、原料樹脂の分子量の選択な
どをもって解決の策とされてきた。By the way, the conventional manufacturing method for thermoplastic resin injection molded products involves injecting molten resin into a flat cavity formed by combining a fixed mold and a movable mold, molding the resin integrally, and then performing a gate cut before curing. Then, the center part was machined to complete the injection molded product. Therefore, although it is believed that birefringence in injection molded products occurs mainly due to molecular orientation and residual stress, it is based on the idea that it is uniquely determined by the injection molding method described above, especially the injection mold structure. Conventionally, the solution has been to select an inner circumferential gate injection method or an outer circumferential gate injection method, molding conditions such as the temperature of the molten resin and injection pressure, and selection of the molecular weight of the raw material resin.
しかしながら、その機械的条件、温度等成形条件によっ
ていたのでは厳格な複屈折の規格要求を満足できず、直
径が１２０ｆｉ以上の大径ディスクになる程重大な技術
的問題となってきた。However, depending on the molding conditions such as mechanical conditions and temperature, it is not possible to satisfy the strict standard requirements for birefringence, and this has become a serious technical problem as the diameter of the disk becomes larger than 120 fi.
本発明は、上記従来方法の問題点を解消し、機械的条件
、成形条件で決まる複屈折を、さらに小さくかつ均一化
できる優れた熱可塑性樹脂射出成形品の製造方法を提供
することを目的とする。An object of the present invention is to provide an excellent method for manufacturing thermoplastic resin injection molded products that solves the problems of the conventional methods described above and can further reduce and uniformize the birefringence determined by mechanical conditions and molding conditions. do.
〔問題点を解決するめの手段および作用〕本発明は、従
来製造方法の機械的条件、成形的条件によっては大型デ
ィスク化に伴い複屈折の改善に限界があること、複屈折
の発生要因が主に分子の配向と残留応力にあること、さ
らに、レーザ光の単色性と高光強度ということに着目し
、射出成形された原射出成形品に穴加工等の機械的加工
を施すとは全く別個の光学的手法による光照射加工を行
うようしたものである。すなわち、熱可塑性樹脂を射出
成形して原射出成形品を成形し、その後該原射出成形品
にレーザ光を照射処理して射出成形品を製造する熱可塑
性樹脂射出成形品の製造方法である。[Means and effects for solving the problems] The present invention solves the problem that, depending on the mechanical conditions and molding conditions of conventional manufacturing methods, there is a limit to the improvement of birefringence as disks become larger, and that the main cause of birefringence is By focusing on the molecular orientation and residual stress, as well as the monochromaticity and high light intensity of laser light, we developed a method that is completely different from performing mechanical processing such as hole drilling on the original injection molded product. This method performs light irradiation processing using an optical method. That is, this is a method for producing a thermoplastic resin injection molded product, in which a thermoplastic resin is injection molded to form an original injection molded product, and then the original injection molded product is irradiated with laser light to produce an injection molded product.
これを詳述すれば、まず公知の各内側金型を有した固定
板と可動板とを組み合わせて成立させたキャビティにノ
ズル受けを介し射出ゲートから流動性ある溶融樹脂を射
出する。この射出成形条件はポリカーボネート樹脂の場
合樹脂温度２５０〜３６０℃と、金型温度５０〜１３０
℃が望ましい。To explain this in detail, first, fluid molten resin is injected from an injection gate through a nozzle receiver into a cavity formed by combining a fixed plate and a movable plate each having a known inner mold. In the case of polycarbonate resin, the injection molding conditions are a resin temperature of 250 to 360°C and a mold temperature of 50 to 130°C.
℃ is preferable.
分子量は１２０００〜２５０００である。さらに後記レ
ーザ光照射工程による効果からすれば、アクリル樹脂、
ポリエステル樹脂等にも適用される。すなわち、デジタ
ルオーディオディスク、ビデオディスク用等の用途、大
きさおよびそれがために要求される他の特性を勘案して
最適な樹脂が選択されるが、成形後残留応力があるよう
な熱可塑性樹脂には広く利用できるが、特に、ポリカー
ボネート樹脂の場合にその効果が大きい実験結果が得ら
れている。The molecular weight is 12,000 to 25,000. Furthermore, considering the effect of the laser light irradiation process described later, acrylic resin,
It is also applied to polyester resin etc. In other words, the most suitable resin is selected taking into consideration the use, size, and other characteristics required for digital audio discs, video discs, etc., but thermoplastic resins that have residual stress after molding are selected. Although it can be widely used for polycarbonate resins, experimental results have shown that it is particularly effective for polycarbonate resins.
この射出成形された原射出成形品は通常すでに中央に穴
をもっている。しかし場合によっては中央の穴加工、不
要部分のトリミング等機械加工を施す。This injection molded original injection molded part usually already has a hole in the center. However, in some cases, machining such as drilling a hole in the center or trimming unnecessary parts is performed.
次いで、機械加工後の原射出成形品にレーザ光を照射処
理し、複屈折を小さくするよう改善する。Next, the original injection molded product after machining is irradiated with laser light to improve the birefringence.
この理由は明らかでなはないが、上述のような複屈折の
要因からすると短時間的熱処理効果による成果と解され
る。The reason for this is not clear, but considering the factors of birefringence mentioned above, it is understood that this is an effect of short-term heat treatment.
従って、レーザ光としては、炭酸ガス、窒素ガス、水素
ガス、アルゴンガス、クリプトンガス、ヘリウムガス等
のガスレーザの他、半導体レーザ発振装置から射出され
るもののいずれでもよいが、波長が５０〜ｂ
は６００〜７００ｎイの範囲がよい。Therefore, the laser light may be any gas laser such as carbon dioxide gas, nitrogen gas, hydrogen gas, argon gas, krypton gas, helium gas, etc., or that emitted from a semiconductor laser oscillation device, but the wavelength is 50-b. A range of 600 to 700n is preferable.
また、照射時間は、１〜１０秒位がよいが、要は、レー
ザ光の光強度と原射出成形品の素材さらには原射出成形
品の複屈折およびその分布等に照らし決定される。The irradiation time is preferably about 1 to 10 seconds, but it is determined based on the light intensity of the laser beam, the material of the original injection molded product, the birefringence of the original injection molded product, its distribution, etc.
原射出成形品に対するレーザ光の照射態様としては、原
射出成形品の円形形状からして、それを回転させながら
行えば、部位間に漏れなく処理できる。一方、特定部位
にのみ照射時間を変えて処理することができる。Considering the circular shape of the original injection molded product, if the original injection molded product is irradiated with laser light while rotating, the laser beam can be irradiated without any leakage between parts. On the other hand, it is possible to treat only specific areas by changing the irradiation time.
また、複屈折の大きさに応じて照射時間を長くすれば全
面的均一化に都合がよい処理ができる。Moreover, if the irradiation time is lengthened depending on the magnitude of birefringence, processing that is convenient for uniformity over the entire surface can be achieved.
なお、生産性を高めるためには、複数のレーザ光を配列
された複数の原射出成形品に左右・前後に振りつつ同時
に照射処理するとよい。In order to increase productivity, it is preferable to simultaneously irradiate a plurality of arrayed original injection molded products with a plurality of laser beams while swinging them from side to side and back and forth.
この発明は、従来の射出成形工程およびその成形金型等
に改善を与えず実施できる。The present invention can be carried out without making any improvements to the conventional injection molding process and its molding die.
このようにして、原射出成形品にレーザ光を照射処理し
て複屈折の低下と均一性の改善をした熱可塑性樹脂射出
成形品の製造方法が確立され前記目的を達成することが
できる。In this way, a method for manufacturing a thermoplastic resin injection molded product in which the original injection molded product is irradiated with laser light to reduce birefringence and improve uniformity is established, and the above object can be achieved.
本発明に係る熱可塑性樹脂射出成形品の製造方法の実施
例を説明する。An example of the method for manufacturing a thermoplastic resin injection molded product according to the present invention will be described.
この実施例は、熱可塑性樹脂が平均分子量が１５０００
のビスフェノールＡポリカーボネート樹脂であり、樹脂
温度３３０℃、金型温度１２０’の条件下で射出圧縮成
形法により、内径１５ｍｍ、外径１３０龍、厚み１．２
ｍｍの光デイスク用の原射出成形品を成形した。In this example, the thermoplastic resin has an average molecular weight of 15,000.
It is made of bisphenol A polycarbonate resin, and is molded by injection compression molding at a resin temperature of 330°C and a mold temperature of 120°C to have an inner diameter of 15 mm, an outer diameter of 130 mm, and a thickness of 1.2 mm.
An original injection molded product for a mm optical disk was molded.
次いで、この原射出成形品の高密度情報を記録する表面
側からヘリウムネオンレーザ管から発光された波長６３
０ｎｓのレーザ光を各部位に等しく連続的に５秒間照射
して処理した。Next, a wavelength 63 beam emitted from a helium-neon laser tube is emitted from the surface side of the original injection molded product where high-density information is recorded.
The treatment was performed by irradiating each site equally and continuously for 5 seconds with a 0 ns laser beam.
この結果、第１表に示す如く原射出成形品に対し製品た
る射出成形品（ディスク基板）の複屈折は大幅に改善さ
れ、特に、ディスクの中心部の複屈折が著しく低下する
とともに全面的均一性も達成された。As a result, as shown in Table 1, the birefringence of the injection molded product (disk substrate) has been significantly improved compared to the original injection molded product, and in particular, the birefringence in the center of the disk has been significantly reduced and is uniform throughout the entire surface. Sex has also been achieved.
第１表
Ｒ：ディスク中心から半径方向の寸法、Δｎｄ、前：射
出成形後の複屈折
Δｎｄｓ後：レーザ光照射処理後の複屈折〔発明の効果
〕
本発明は、射出成形された原射出成形品にレーザ光を照
射して複屈折とその分布均一性を改善できる優れた効果
を有する。Table 1 R: Dimension in the radial direction from the center of the disk, Δnd, Before: Birefringence after injection molding Δnds After: Birefringence after laser beam irradiation treatment It has the excellent effect of improving birefringence and its distribution uniformity by irradiating the product with laser light.
Claims (4)
し、その後該原射出成形品にレーザ光を照射処理して射
出成形品を製造する熱可塑性樹脂射出成形品の製造方法
。(1) A method for producing a thermoplastic resin injection molded product, which comprises injection molding a thermoplastic resin to form an original injection molded product, and then irradiating the original injection molded product with a laser beam to produce an injection molded product.
成形品を回転させながら前記レーザ光を照射する熱可塑
性樹脂の射出成形品の製造方法。(2) The method for manufacturing an injection molded thermoplastic resin article according to claim 1, wherein the original injection molded article is irradiated with the laser beam while rotating the original injection molded article.
て、前記レーザ光を前記原射出成形品の複屈折の大小に
よって光強さまたは照射時間を変えて照射する熱可塑性
樹脂の射出成形品の製造方法。(3) Injection molding of a thermoplastic resin according to claim 1 or 2, wherein the laser beam is irradiated with varying light intensity or irradiation time depending on the magnitude of birefringence of the original injection molded product. method of manufacturing the product.
、前記レーザ光を複数の光ビームから形成し各光ビーム
を同時に照射する熱可塑性樹脂の射出成形品の製造方法
。(4) The method for manufacturing an injection molded thermoplastic resin article according to claim 1 or 2, wherein the laser light is formed from a plurality of light beams and each light beam is irradiated simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3244586A JPS62190233A (en) | 1986-02-17 | 1986-02-17 | Production of injection molded thermoplastic resin article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3244586A JPS62190233A (en) | 1986-02-17 | 1986-02-17 | Production of injection molded thermoplastic resin article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62190233A true JPS62190233A (en) | 1987-08-20 |
Family
ID=12359158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3244586A Pending JPS62190233A (en) | 1986-02-17 | 1986-02-17 | Production of injection molded thermoplastic resin article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62190233A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009509006A (en) * | 2005-09-16 | 2009-03-05 | タイコ・ヘルスケアー・グループ・エルピー | Stress relaxation method for polymer materials |
-
1986
- 1986-02-17 JP JP3244586A patent/JPS62190233A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009509006A (en) * | 2005-09-16 | 2009-03-05 | タイコ・ヘルスケアー・グループ・エルピー | Stress relaxation method for polymer materials |
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