JP6472256B2 - Transparent resin hollow molded body and method for producing the same - Google Patents
Transparent resin hollow molded body and method for producing the same Download PDFInfo
- Publication number
- JP6472256B2 JP6472256B2 JP2015014944A JP2015014944A JP6472256B2 JP 6472256 B2 JP6472256 B2 JP 6472256B2 JP 2015014944 A JP2015014944 A JP 2015014944A JP 2015014944 A JP2015014944 A JP 2015014944A JP 6472256 B2 JP6472256 B2 JP 6472256B2
- Authority
- JP
- Japan
- Prior art keywords
- molded body
- cylindrical
- transparent resin
- hot air
- producing
- 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.)
- Active
Links
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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/91—Heating, e.g. for cross linking
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
本発明は、透明樹脂中空成形体の改良、詳しくは、流体を移送する配管の一部に設ける透明な内視管や、フィルター(ろ過膜等)等の透明ハウジングに用いた際に優れた内部視認性を得ることができ、しかも、透明度のムラもなく、長尺な寸法にも対応できる透明樹脂中空成形体、及びその製造方法に関するものである。 The present invention is an improvement of a transparent resin hollow molded body, more specifically, a transparent endoscope provided in a part of a pipe for transferring a fluid, and an excellent interior when used in a transparent housing such as a filter (filtration membrane, etc.) The present invention relates to a transparent resin hollow molded body that can obtain visibility, has no unevenness in transparency, and can accommodate long dimensions, and a method for producing the same.
近年、ろ過装置や実験装置等の分野において、配管の一部やフィルター等のハウジングに透明な筒状部材を使用することにより、流体やフィルター等の状態を確認できるようにしたものが開発されている。しかし、この種の内視管や透明ハウジングにガラス管を用いると、流体の急激な温度変化によってガラス管が割れてしまう危険がある。 In recent years, in the fields of filtration devices and experimental devices, the use of a transparent tubular member for a part of piping or a housing for a filter has been developed so that the state of a fluid or a filter can be confirmed. Yes. However, if a glass tube is used for this type of endoscope tube or transparent housing, there is a risk that the glass tube will break due to a rapid temperature change of the fluid.
そこで、従来においては、上記内視管や透明ハウジングに、温度変化に強い透明樹脂材料から成る筒状部材を使用する技術も公知となっているが(特許文献１参照)、この文献１に係る技術では、筒状部材を射出成形によって作製していたため、長尺な寸法の筒状部材を低コストで製造することが難しかった。 Therefore, conventionally, a technique of using a cylindrical member made of a transparent resin material that is resistant to temperature changes is also known for the endoscope and the transparent housing (see Patent Document 1). In the technology, since the cylindrical member is manufactured by injection molding, it is difficult to manufacture a long-sized cylindrical member at low cost.
一方、上記筒状部材を、透明樹脂材料を押出成形して作製する場合には、押出成形機のダイ孔から押し出された筒状成形体の外周面に、ダイ孔内壁との接触による細かな凹凸が形成され、これが曇りとなって透明度の低下を招いた。そのため、この筒状部材を上記内視管や透明ハウジングに用いても、充分な内部視認性が得られなかった。 On the other hand, when the cylindrical member is produced by extruding a transparent resin material, the outer surface of the cylindrical molded body extruded from the die hole of the extruder is finely brought into contact with the inner wall of the die hole. Concavities and convexities were formed, which became cloudy and caused a decrease in transparency. For this reason, even when this cylindrical member is used for the endoscope tube or the transparent housing, sufficient internal visibility cannot be obtained.
また、従来においては、透明樹脂材料を押出成形して成る筒状部材の表面を加熱処理して、表面の微細な凹凸を滑らかにすることにより、透明性を向上させる技術も公知となっているが(特許文献２参照)、炎による直接加熱を行うと、どうしても炎の接触箇所と非接触箇所で加熱ムラが生じて全体の透明性を均一に仕上げることができなかった。 In addition, conventionally, a technique for improving transparency by heat-treating the surface of a cylindrical member formed by extruding a transparent resin material to smooth fine irregularities on the surface is also known. However (see Patent Document 2), when direct heating with a flame is performed, heating unevenness is inevitably generated at the contacted and non-contacted locations of the flame, and the entire transparency cannot be finished uniformly.
また更に、上記文献２中には、輻射熱による間接加熱を行って筒状成形体を表面処理する方法も開示されているが、周知のように輻射熱による加熱は、赤外線が対象物の内部まで浸透して対象物の外側だけでなく内側も同時に加熱するため、筒状成形体の表面のみを高温加熱することが難しく、全体の変形を招き易かった。 Furthermore, in the above-mentioned document 2, a method of surface-treating a tubular molded body by performing indirect heating by radiant heat is also disclosed. As is well known, in the case of heating by radiant heat, infrared rays penetrate into the inside of an object. Since not only the outer side of the object but also the inner side is heated at the same time, it is difficult to heat only the surface of the cylindrical molded body at a high temperature, which easily causes the entire deformation.
本発明は、上記問題に鑑みて為されたものであり、その目的とするところは、流体を移送する配管の一部に設ける透明な内視管や、フィルター等の透明ハウジングに用いた場合でも優れた内部視認性を確保することができ、しかも、透明度のムラも生じず、長尺な寸法にも対応できる透明樹脂中空成形体、及びその製造方法を提供することにある。 The present invention has been made in view of the above problems, and the object of the present invention is even when used in a transparent endoscope tube or a transparent housing such as a filter provided in a part of a pipe for transferring a fluid. It is an object of the present invention to provide a transparent resin hollow molded body that can ensure excellent internal visibility, and that does not cause uneven transparency, and that can accommodate long dimensions, and a method for producing the same.
本発明者が上記課題を解決するために採用した手段を添付図面を参照して説明すれば次のとおりである。 Means employed by the present inventor for solving the above-described problems will be described with reference to the accompanying drawings.
即ち、本発明は、透明な熱可塑性樹脂材料を押出成形機によって筒状に成形する透明樹脂中空成形体の製造方法において、
前記熱可塑性樹脂を押出成形機のダイから筒状に押し出す工程と；この押し出された筒状成形体を引き取りながら冷却装置を通して冷却賦形する工程と；この賦形後の筒状成形体を引き取りながら熱風加熱装置を通して成形体表面を全周的に加熱する工程とを含む方法を採用した点に特徴がある。
That is, the present invention is a method for producing a transparent resin hollow molded body in which a transparent thermoplastic resin material is molded into a cylindrical shape by an extruder,
A step of extruding the thermoplastic resin from a die of an extrusion molding machine into a cylindrical shape; a step of cooling and shaping through the cooling device while taking out the extruded cylindrical molded body; and taking out the cylindrical molded body after shaping However, it is characterized in that a method including a step of heating the entire surface of the molded body through a hot air heating device is adopted.
また、上記熱風加熱装置による熱風処理温度については、１５０℃〜３００℃とするのが好ましい。これは、加熱温度が１５０℃以下だと表面処理効果が得られず、３００℃以上だと熱分解や変質の問題が生じるためである。 Moreover, about the hot-air process temperature by the said hot-air heating apparatus, it is preferable to set it as 150 to 300 degreeC. This is because if the heating temperature is 150 ° C. or lower, the surface treatment effect cannot be obtained, and if the heating temperature is 300 ° C. or higher, problems of thermal decomposition and alteration occur.
また更に、熱風処理時間については、1sec〜60secとするのが好ましい。これは、加熱時間が1secよりも短いと表面処理効果が得られず、60secよりも長いと全体が変形し易くなるためである。 Furthermore, the hot air treatment time is preferably 1 sec to 60 sec. This is because if the heating time is shorter than 1 sec, the surface treatment effect cannot be obtained, and if it is longer than 60 sec, the whole is easily deformed.
また本発明では、上記熱風処理による効果を高める、または短時間の熱風処理でも充分な効果を得るために、筒状成形体を冷却賦形した後、熱風処理の前に、前記賦形後の筒状成形体を引き取りながらアニール炉内を通して筒状成形体を昇温させる工程を採用するのが好ましい。 Further, in the present invention, in order to enhance the effect of the hot air treatment or to obtain a sufficient effect even with a short hot air treatment, after the cylindrical shaped body is cooled and shaped, before the hot air treatment, It is preferable to employ a step of raising the temperature of the cylindrical molded body through the annealing furnace while taking up the cylindrical molded body.
また更に、本発明では、上記筒状成形体の内部の歪みを除去するために、筒状成形体の熱風処理後に、筒状成形体を切断する工程、及びこの切断した筒状成形体をアニール炉内で加熱する工程、及びこの加熱した筒状成形体を徐冷する工程を採用するのが好ましい。 Furthermore, in the present invention, in order to remove the distortion inside the cylindrical molded body, after the hot air treatment of the cylindrical molded body, a step of cutting the cylindrical molded body, and annealing the cut cylindrical molded body It is preferable to employ a step of heating in a furnace and a step of gradually cooling the heated cylindrical molded body.
そしてまた、本発明では、上記透明な熱可塑性樹脂材料に、より透明度の高いポリサルフォン樹脂、ポリカーボネート樹脂またはアクリル樹脂を使用するのが好ましい。 In the present invention, it is preferable to use a polysulfone resin, polycarbonate resin or acrylic resin having higher transparency for the transparent thermoplastic resin material.
一方、上記製造方法により透明な熱可塑性樹脂材料を筒状に押出成形して、表面全体に熱風処理を施し、ヘイズ値を５％以下とした透明樹脂中空成形体は、内部状態を視認可能な透明ハウジング等の用途で好適に使用できる。 On the other hand, a transparent resin hollow molded body obtained by extruding a transparent thermoplastic resin material into a cylindrical shape by the above manufacturing method and subjecting the entire surface to hot air treatment and having a haze value of 5% or less can visually recognize the internal state. It can be suitably used for applications such as a transparent housing.
本発明では、透明樹脂中空成形体について、押出成形後の筒状成形体の表面に熱風処理を施すことにより、筒状成形体の表面の細かな凹凸を滑らかにして曇りを除去することができるため、内視管やフィルター等の透明ハウジングの利用に適した透明度の高い樹脂成形体を製造することが可能となる。 In the present invention, by subjecting the transparent resin hollow molded body to hot air treatment on the surface of the cylindrical molded body after extrusion molding, it is possible to smooth the fine irregularities on the surface of the cylindrical molded body and remove haze. Therefore, it becomes possible to manufacture a highly transparent resin molded product suitable for the use of a transparent housing such as an endoscope or a filter.
しかも、本発明では、上記筒状成形体の表面処理手段として熱風加熱を採用しているため、加熱ムラも生じず全体の透明度が均一になるように仕上げることができる。また熱風加熱は、熱伝導によって温度を変化させるため、筒状成形体の内側まで加熱されるようなことはなく、表面部分のみを高温加熱することができる。 In addition, in the present invention, since hot air heating is employed as the surface treatment means of the cylindrical molded body, it can be finished so that the entire transparency is uniform without causing uneven heating. Moreover, since hot air heating changes temperature by heat conduction, it is not heated to the inside of the cylindrical molded body, and only the surface portion can be heated at high temperature.
また更に、本発明では、筒状成形体を射出成形でなく押出成形によって作製しているため、長尺な寸法の中空成形品であっても同じ成形装置を用いて低コストで製造することができる。また本発明に係る透明樹脂中空成形体は、急激な温度変化にも強いため、多様な使用環境に対応できる。 Furthermore, in the present invention, since the cylindrical molded body is produced by extrusion rather than injection molding, even a long dimension hollow molded article can be produced at low cost using the same molding apparatus. it can. Moreover, since the transparent resin hollow molded body according to the present invention is resistant to sudden temperature changes, it can be used in various usage environments.
したがって、本発明により、従来において使用上の課題であった内部視認性の問題を改善できるだけでなく、製造上の不都合も解消できる他分野に利用可能な透明樹脂中空成形体を提供できることから、本発明の実用的利用価値は頗る高い。 Therefore, according to the present invention, it is possible to provide a transparent resin hollow molded body that can be used in other fields, which can not only improve the problem of internal visibility, which has been a problem in use in the past, but also eliminate manufacturing inconveniences. The practical utility value of the invention is very high.
次に、本発明を実施するための具体的態様及び好ましい条件について説明する。 Next, specific embodiments and preferable conditions for carrying out the present invention will be described.
［透明樹脂中空成形体の製造方法］
本発明の透明樹脂中空成形体の製造方法について以下に説明する。まず図１に示すように、材料となる透明な熱可塑性樹脂を押出成形機Ｅ内に投入し、これを加熱溶融させてダイから筒状に押し出す。そして、この押し出された筒状成形体Ｐを奥側に配置された引き取り機Ｔで引き取りながら冷却装置Ｒを通して冷却賦形する。
[Method for producing transparent resin hollow molded body]
The method for producing the transparent resin hollow molded body of the present invention will be described below. First, as shown in FIG. 1, a transparent thermoplastic resin as a material is put into an extruder E, and this is heated and melted and extruded from a die into a cylinder. Then, the extruded cylindrical molded body P is cooled and shaped through the cooling device R while being taken up by the take-up machine T disposed on the back side.
なお、上記材料となる熱可塑性樹脂については、透明な汎用樹脂やエンジニアリングプラスチック等から自由に選択できるが、特に透明性に優れたポリサルフォン樹脂やポリカーボネート樹脂、アクリル樹脂を好適に使用できる。また筒状成形体Ｐの形状は、必ずしも円筒である必要はなく用途に応じて楕円筒や角筒とすることもできる。 The thermoplastic resin used as the material can be freely selected from transparent general-purpose resins and engineering plastics. Polysulfone resins, polycarbonate resins, and acrylic resins that are particularly excellent in transparency can be suitably used. Moreover, the shape of the cylindrical molded body P does not necessarily need to be a cylinder, and may be an elliptical cylinder or a square cylinder depending on the application.
また、上記筒状成形体Ｐを冷却賦形した後は、賦形後の筒状成形体Ｐを引き取りながらアニール炉Ａ内を通して筒状成形体Ｐを昇温させる。この際、熱可塑性樹脂にポリサルフォン樹脂を使用する場合には、９０〜１５０℃(好ましくは１１０〜１２０℃)で３〜３０分(好ましくは１０〜２０分)加熱するのが望ましい(例えば、全長3mのアニール炉Ａを使用して、筒状成形体Ｐを線速0.2m/minで通過させる等)。 Moreover, after cooling and shaping the cylindrical molded body P, the cylindrical molded body P is heated through the annealing furnace A while taking the cylindrical molded body P after shaping. In this case, when a polysulfone resin is used as the thermoplastic resin, it is desirable to heat at 90 to 150 ° C. (preferably 110 to 120 ° C.) for 3 to 30 minutes (preferably 10 to 20 minutes) (for example, full length Using a 3 m annealing furnace A, the tubular molded body P is passed at a linear speed of 0.2 m / min, etc.).
そして更に、上記筒状成形体Ｐを昇温させた後は、昇温後の筒状成形体Ｐを引き取りながら熱風加熱装置Ｈを通して成形体表面を全周的に加熱する。この際、熱風加熱装置Ｈによる熱風処理は、表面処理効果を充分得ることができ、かつ、熱分解や変質等の問題も生じない１５０℃〜３００℃(好ましくは１８０〜２５０℃)の範囲で行うのが好ましい。 Further, after the temperature of the cylindrical molded body P is raised, the surface of the molded body is heated all around through the hot air heating device H while taking up the cylindrical molded body P after the temperature rise. In this case, the hot air treatment by the hot air heating device H can obtain a sufficient surface treatment effect and does not cause problems such as thermal decomposition and alteration, and is in the range of 150 ° C. to 300 ° C. (preferably 180 ° C. to 250 ° C.). It is preferred to do so.
また更に、上記熱風加熱装置Ｈによる熱風処理は、充分な表面処理効果を得ることができ、かつ、熱が筒状成形体Ｐの内側まで伝わり難い1〜60sec(好ましくは1〜10sec)の時間で行うのが好ましい(例えば、瞬間的に筒状成形体Ｐの長さ方向10〜200mmの範囲を加熱可能な熱風加熱装置を使用して、筒状成形体Ｐを線速0.2m/minで通過させる等)。 Furthermore, the hot air treatment by the hot air heating device H can obtain a sufficient surface treatment effect, and the heat is not easily transmitted to the inside of the cylindrical molded body P for 1 to 60 seconds (preferably 1 to 10 seconds). (For example, using a hot-air heating device capable of instantaneously heating the range of 10 to 200 mm in the length direction of the cylindrical molded body P, the cylindrical molded body P is moved at a linear velocity of 0.2 m / min. Etc.).
なお、上記熱風加熱処理前の昇温工程に関しては、必須の工程ではなく省略することも可能であるが、アニール炉Ａによる昇温工程を前段階に入れることによって短時間の熱風処理で優れた表面処理効果を得ることができる。また、アニール炉Ａ以外の加熱手段によって筒状成形体Ｐを昇温することもできる。 Note that the temperature raising step before the hot air heating treatment is not an essential step and can be omitted, but the temperature raising step by the annealing furnace A is excellent in short-time hot air treatment by putting it in the previous stage. A surface treatment effect can be obtained. Further, the temperature of the cylindrical molded body P can be raised by a heating means other than the annealing furnace A.
そして、上記筒状成形体Ｐに熱風処理を施した後は、切断装置Ｃによって筒状成形体Ｐを所定長さで切断し、更に熱風処理工程により生じた筒状成形体Ｐの内部の歪みを除去するために、切断した筒状成形体Ｐをアニール炉内でもう一度加熱し、その後、加熱した筒状成形体Ｐを徐冷する。これにより、透明度の高い透明樹脂中空成形体を効率的に作製することが可能となる。 And after performing the hot air process to the said cylindrical molded object P, the cylindrical molded object P is cut | disconnected by predetermined length with the cutting device C, and also the distortion inside the cylindrical molded object P which arose by the hot air processing process In order to remove the above, the cut cylindrical molded body P is heated once more in the annealing furnace, and then the heated cylindrical molded body P is gradually cooled. Thereby, it becomes possible to efficiently produce a transparent resin hollow molded body having high transparency.
なお、上記筒状成形体Ｐの歪み除去工程に関しては、熱可塑性樹脂にポリサルフォン樹脂を使用する場合、アニール炉内で１１０〜１７０℃の加熱を１〜１０時間(好ましくは１２０〜１６５℃の加熱を３〜８時間)行ってから、筒状成形体Ｐを自然冷却するのが好ましい。また、歪み除去工程は必須の工程ではないが、これにより割れ難い耐久性に優れた透明樹脂中空成形体を製造できる。 In addition, regarding the distortion removal process of the said cylindrical molded object P, when using polysulfone resin for a thermoplastic resin, 110-170 degreeC heating in an annealing furnace is carried out for 1 to 10 hours (preferably 120-165 degreeC heating). For 3 to 8 hours), the cylindrical molded body P is preferably naturally cooled. Moreover, although a distortion removal process is not an essential process, the transparent resin hollow molded object excellent in durability which is hard to break by this can be manufactured.
そしてまた、図１中には、押出成形機Ｅから押し出された筒状成形体Ｐを所定速度で引き取るための引き取り機Ｔを、熱風加熱装置Ｈと切断装置Ｃの間に配置する構成を記載しているが、引き取り機Ｔの配置は図示の位置に限定されるものではなく、アニール炉Ａの手前に配置することもできる。 Further, in FIG. 1, a configuration in which a take-up machine T for taking up the cylindrical molded body P extruded from the extrusion molding machine E at a predetermined speed is arranged between the hot air heating device H and the cutting device C is described. However, the arrangement of the take-up machine T is not limited to the position shown in the figure, and can be arranged in front of the annealing furnace A.
［透明樹脂中空成形体］
次に本発明の透明樹脂中空成形体について以下に説明する。本発明の透明樹脂中空成形体は、上記製造方法を用いて透明度の指標であるヘイズ値が５％以下となるように作製している。これにより、透明樹脂中空成形体をろ過装置の透明ハウジングに使用した場合でも、内部状態をはっきりと視認することが可能となる。
[Transparent resin hollow molding]
Next, the transparent resin hollow molded body of the present invention will be described below. The transparent resin hollow molded body of the present invention is produced using the above production method so that the haze value, which is an index of transparency, is 5% or less. Thereby, even when a transparent resin hollow molded object is used for the transparent housing of a filtration apparatus, it becomes possible to visually recognize an internal state clearly.
[効果の実証試験]
次に、本発明の効果を示すために行った実証試験について以下に説明する。まず本試験では、上記製造方法を用いて作製した透明樹脂中空成形体と、熱風加熱処理を行わずに作製した透明樹脂中空成形体との透明性の比較を行うために、下記実施例１および比較例Ａの方法によりサンプルを作製した。
[Effectiveness test]
Next, a demonstration test conducted to show the effect of the present invention will be described below. First, in this test, in order to compare the transparency of the transparent resin hollow molded body produced using the above production method and the transparent resin hollow molded body produced without performing hot air heating treatment, the following Example 1 and A sample was prepared by the method of Comparative Example A.
「実施例１」
この実施例１では、材料となる熱可塑性樹脂にポリサルフォン樹脂を使用し、押出成形機Ｅによる押出工程、冷却装置Ｒによる冷却工程、アニール炉Ａによる昇温工程、熱風処理装置Ｈによる熱風処理工程、切断装置Ｃによる切断工程、アニール炉による歪み除去工程を経て円筒状のサンプルを作製した。
"Example 1"
In Example 1, a polysulfone resin is used as a thermoplastic resin as a material, an extrusion process by an extruder E, a cooling process by a cooling device R, a temperature raising process by an annealing furnace A, and a hot air processing process by a hot air processing apparatus H. A cylindrical sample was produced through a cutting process using a cutting apparatus C and a strain removing process using an annealing furnace.
「比較例Ａ」
この比較例Ａでは、材料となる熱可塑性樹脂にポリサルフォン樹脂を使用し、押出成形機Ｅによる押出工程、冷却装置Ｒによる冷却工程、切断装置Ｃによる切断工程を経て円筒状のサンプルを作製した。昇温工程や熱風処理工程、歪み除去工程の有無を除き、実施例１と同じ条件で作製した。
"Comparative Example A"
In Comparative Example A, a polysulfone resin was used as a thermoplastic resin as a material, and a cylindrical sample was produced through an extrusion process by an extruder E, a cooling process by a cooling device R, and a cutting process by a cutting device C. It was produced under the same conditions as in Example 1 except for the presence or absence of a temperature raising step, a hot air treatment step, and a distortion removal step.
＜試験内容＞
そして、上記実施例１及び比較例Ａの各サンプルについて、ヘイズ値の測定を行った。その結果、以下の表１に示すように、熱風加熱処理を行った実施例１のヘイズ値の方が、熱風加熱処理を行わなかった比較例Ａのヘイズ値よりもかなり小さくなり、透明性が格段に向上していることが確認できた。
And about each sample of the said Example 1 and the comparative example A, the haze value was measured. As a result, as shown in Table 1 below, the haze value of Example 1 where the hot air heat treatment was performed was considerably smaller than the haze value of Comparative Example A where the hot air heat treatment was not performed, and transparency was improved. It was confirmed that there was a marked improvement.
近年、ろか装置等の内視管や透明ハウジングにおいて、製造時に生じたプラスチックの曇りによって内部視認性が悪化する問題が生じている。そのような中で、本発明は、これらの問題を解消できる曇りのない透明樹脂製品を製造できるだけでなく、透明性が求められる装飾品等の展示ケースやペット飼育用の水槽、実験器具等の製品に利用できる技術であることから、その産業上の利用価値は非常に高い。 In recent years, there has been a problem that internal visibility deteriorates due to the fogging of plastic generated during manufacture in endoscope tubes and transparent housings such as filter devices. Under such circumstances, the present invention can not only produce cloudless transparent resin products that can solve these problems, but also display cases such as decorative items that require transparency, pet tanks, laboratory equipment, etc. Since it is a technology that can be used for products, its industrial utility value is very high.
Ｅ 押出成形機
Ｐ 筒状成形体
Ｒ 冷却装置
Ａ アニール炉
Ｈ 熱風加熱装置
Ｔ 引き取り機
Ｃ 切断装置
E Extruder P Cylindrical compact R Cooling device A Annealing furnace H Hot air heating device T Take-off machine C Cutting device
Claims (6)
前記熱可塑性樹脂を押出成形機のダイから筒状に押し出す工程と；この押し出された筒状成形体を引き取りながら冷却装置を通して冷却賦形する工程と；この賦形後の筒状成形体を引き取りながら熱風加熱装置を通して成形体表面を全周的に加熱する工程とを含むことを特徴とする透明樹脂中空成形体の製造方法。 In a method for producing a transparent resin hollow molded body in which a transparent thermoplastic resin material is molded into a cylindrical shape by an extruder,
A step of extruding the thermoplastic resin from a die of an extrusion molding machine into a cylindrical shape; a step of cooling and shaping through the cooling device while taking out the extruded cylindrical molded body; and taking out the cylindrical molded body after shaping And a step of heating the entire surface of the molded body through a hot-air heating device, while producing a transparent resin hollow molded body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015014944A JP6472256B2 (en) | 2015-01-29 | 2015-01-29 | Transparent resin hollow molded body and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015014944A JP6472256B2 (en) | 2015-01-29 | 2015-01-29 | Transparent resin hollow molded body and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2016137670A JP2016137670A (en) | 2016-08-04 |
| JP6472256B2 true JP6472256B2 (en) | 2019-02-20 |
Family
ID=56558271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015014944A Active JP6472256B2 (en) | 2015-01-29 | 2015-01-29 | Transparent resin hollow molded body and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6472256B2 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5537301A (en) * | 1978-09-07 | 1980-03-15 | Michio Oshima | Production of polyester pipe with good transparency and small content of acetaldehyde |
| GB2158260B (en) * | 1984-05-03 | 1988-02-10 | Standard Telephones Cables Ltd | Optical fibres |
| JP2530182B2 (en) * | 1987-11-17 | 1996-09-04 | 株式会社イノアックコーポレーション | Method for manufacturing molding with metallic appearance |
| JPH07339B2 (en) * | 1990-11-27 | 1995-01-11 | 筒中プラスチック工業株式会社 | Manufacturing method and manufacturing apparatus for artificial marble with little internal distortion |
| JP2000289088A (en) * | 1999-04-05 | 2000-10-17 | Sumitomo Wiring Syst Ltd | Manufacture of transparent vinyl chloride coated cable |
| JP2004292728A (en) * | 2003-03-28 | 2004-10-21 | Mitsubishi Engineering Plastics Corp | Polycarbonate resin composition and molded article |
| JP2007002240A (en) * | 2005-05-27 | 2007-01-11 | Toyobo Co Ltd | Stretch blow molded polyester article and method for producing the same |
-
2015
- 2015-01-29 JP JP2015014944A patent/JP6472256B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016137670A (en) | 2016-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MX2015009243A (en) | Glass-fibers-reinforced thermoplastic resin molded article and method for producing same. | |
| ATE367260T1 (en) | MOLD AND METHOD FOR PRODUCING A LENS FROM THERMOPLASTIC PLASTIC | |
| SE7609660L (en) | WAY TO PRODUCE FOREMALS OF TRANSPARENT PLASTIC | |
| JP6472256B2 (en) | Transparent resin hollow molded body and method for producing the same | |
| GB948937A (en) | Method and apparatus for producing films of organic thermoplastic material having improved optical properties | |
| Barocio et al. | Fusion bonding simulations of semi-crystalline polymer composites in the extrusion deposition additive manufacturing process | |
| CN109721910B (en) | Plasticizer, polyvinyl alcohol composition, polyvinyl alcohol film and preparation method thereof | |
| JP2014198416A5 (en) | ||
| CN105714392A (en) | Technology for producing flat filaments of woven cloth by plastic processing | |
| JP2012030522A (en) | Die apparatus for resin molded article and method for manufacturing the same | |
| WO2010060760A3 (en) | Method and device for producing strand-shaped goods | |
| MX2011013438A (en) | Process for producing medical instruments. | |
| Mikulenok | Intensification of fabrication of extruded polymeric shapes | |
| US20200009782A1 (en) | Method of Shaping Products made of HDPE or PA, particularly Spatial Shaping of HDPE or PA Tubes, and a Device for Performing it | |
| Formisano et al. | Localized heat assisted incremental forming of polycarbonate sheets by tool rotation | |
| CN102120873B (en) | Biaxially-stretched polyaryletherketone film and preparation method thereof | |
| Mikulionok | Modeling of the heat processing of continuously molded product | |
| TWI710343B (en) | Manufacturing method and finished product of environmental protection fabric straw | |
| US20200139589A1 (en) | Mould for the Spatial Shaping of Plastic Parts made of HDPE or PA or Similar Plastics, in particular HDPE or PA Tubes | |
| US20230201912A1 (en) | Polymer molds, apparatus, and method | |
| CN106239926A (en) | A kind of production method of plastic cup | |
| TH1801006144A (en) | Manufacturing method of embossing workpiece And the workpiece, which has been made in embossing | |
| CN117183516A (en) | Multilayer co-extrusion heat-shrinkable film with high fluidity and preparation method thereof | |
| CN106335173A (en) | Inner core supporting and traction method for extrusion molding of PFA large-diameter thin-walled tube | |
| KR20130114649A (en) | High-polymer material and method for producing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20171030 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20180809 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20180817 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20181011 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20190118 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20190122 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6472256 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |