JP2003130285A - Heat insulating tube and method of manufacturing the tube - Google Patents
Heat insulating tube and method of manufacturing the tubeInfo
- Publication number
- JP2003130285A JP2003130285A JP2001331061A JP2001331061A JP2003130285A JP 2003130285 A JP2003130285 A JP 2003130285A JP 2001331061 A JP2001331061 A JP 2001331061A JP 2001331061 A JP2001331061 A JP 2001331061A JP 2003130285 A JP2003130285 A JP 2003130285A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat insulating
- release agent
- heat
- resin foam
- 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
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Laminated Bodies (AREA)
- Thermal Insulation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は保温チューブ及びそ
の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating tube and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】従来より、熱可塑性樹脂発泡シートを円
筒状に成形した保温チューブは、給湯配管に用いられる
銅管等の断熱材として多用されている。熱可塑性樹脂発
泡シートからなる保温チューブを給湯配管用銅管に使用
した場合、給湯配管用銅管の近傍の保温チューブ自体が
加熱され、熱可塑性樹脂発泡シートの軟化温度を超える
と、保温チューブの内面が部分的に融解して銅管に熱融
着する。しかも、加熱されることによって、保温チュー
ブ自体の破壊強度が大幅に低下するため、銅管に熱融着
着した部分が破壊して銅管側に残存する。このため、保
温チューブを取り替える際には、銅管側に残存する部分
を除去する必要があり、除去に手間がかかるという問題
点があった。2. Description of the Related Art Conventionally, a heat insulating tube formed by molding a thermoplastic resin foam sheet into a cylindrical shape has been widely used as a heat insulating material such as a copper tube used for hot water supply piping. When a heat insulation tube made of a thermoplastic resin foam sheet is used for the copper tube for hot water supply piping, the heat insulation tube itself near the copper tube for hot water supply piping is heated, and if the softening temperature of the thermoplastic resin foam sheet is exceeded, The inner surface is partially melted and heat-bonded to the copper tube. Moreover, since the breaking strength of the heat insulating tube itself is greatly reduced by being heated, the portion heat-bonded to the copper tube is broken and remains on the copper tube side. For this reason, when replacing the heat insulating tube, it is necessary to remove the portion remaining on the copper tube side, and there is a problem that removal takes time.
【０００３】上記問題点に対して、実開昭６２−１９４
０２８号公報には、熱可塑性樹脂発泡体の片面に石綿シ
ートを接着剤により接合した複合体を円筒状に成形した
複合保温材が提案されている。しかしながら、この複合
保温材を円筒状に成形する際に、石綿シートにしわが発
生するという問題点があった。In order to solve the above-mentioned problems, Japanese Utility Model Laid-Open No. 62-194
In Japanese Patent Laid-Open No. 028, there is proposed a composite heat insulating material in which a composite in which an asbestos sheet is bonded to one surface of a thermoplastic resin foam by an adhesive is formed into a cylindrical shape. However, there was a problem that wrinkles were generated in the asbestos sheet when the composite heat insulating material was formed into a cylindrical shape.
【０００４】また、上記問題点に対して、実開昭４９−
１５５７２号公報には、管状に成形した発泡樹脂管体の
内面にシート状補強材が積層され、外面に外装体が積層
された断熱管が開示されている。しかしながら、この断
熱管を円筒状に成形する際に、シート状補強材にしわが
発生するという問題点があった。In addition, in order to solve the above-mentioned problems,
Japanese Patent No. 155772 discloses a heat insulating tube in which a sheet-shaped reinforcing material is laminated on the inner surface of a foamed resin tube body formed in a tubular shape, and an exterior body is laminated on the outer surface thereof. However, when this heat insulating tube is formed into a cylindrical shape, there is a problem that wrinkles occur in the sheet-shaped reinforcing material.
【０００５】[0005]
【発明が解決しようとする課題】本発明は以上の問題点
を解決し、その目的は、熱可塑性樹脂発泡シートからな
る保温チューブが給湯配管用銅管の保温材として使用さ
れ、銅管側近傍の保温チューブ温度が軟化温度を超えて
も、銅管側に熱融着して残存することがない保温チュー
ブ及びその製造方法を提供することにある。SUMMARY OF THE INVENTION The present invention solves the above problems, and an object thereof is to use a heat insulating tube made of a thermoplastic resin foam sheet as a heat insulating material for a copper pipe for hot water supply piping, and to provide the vicinity of the copper pipe side. An object of the present invention is to provide a heat insulating tube that does not remain after being heat-sealed to the copper pipe even when the temperature of the heat insulating tube exceeds the softening temperature, and a manufacturing method thereof.
【０００６】[0006]
【課題を解決するための手段】請求項１記載の保温チュ
ーブは、熱可塑性樹脂発泡シートの片面に離型剤層が積
層され、該離型剤層を内側として円筒状に成形されてな
ることを特徴とする。The heat insulation tube according to claim 1 is formed by laminating a release agent layer on one surface of a thermoplastic resin foam sheet, and molding the release agent layer inside in a cylindrical shape. Is characterized by.
【０００７】請求項２記載の保温チューブの製造方法
は、熱可塑性樹脂発泡シートの片面に離型剤を塗布乾燥
して離型剤層を設けた後該離型剤層を内側として円筒状
に成形し、熱可塑性樹脂発泡シートの両側面を熱融着す
ることを特徴とする。According to a second aspect of the present invention, there is provided a method for producing a heat insulating tube, wherein a thermoplastic resin foam sheet is coated with a release agent on one side thereof and dried to provide a release agent layer, and then the release agent layer is formed into a cylindrical shape. It is characterized in that both sides of the thermoplastic resin foam sheet are heat-sealed by molding.
【０００８】以下に、本発明を詳細に説明する。本発明
の保温チューブに使用される熱可塑性樹脂発泡シートと
しては、例えば、ポリエチレン、ポリプロピレン、ポリ
塩化ビニル、エチレン−酢酸ビニル共重合体、ナイロン
等の熱可塑性樹脂を構成材料とする発泡シートが挙げら
れる。The present invention will be described in detail below. Examples of the thermoplastic resin foam sheet used for the heat insulating tube of the present invention include a foam sheet made of a thermoplastic resin such as polyethylene, polypropylene, polyvinyl chloride, ethylene-vinyl acetate copolymer and nylon. To be
【０００９】上記熱可塑性樹脂発泡シートの発泡倍率
は、断熱性や強度の点から５〜５０倍が好ましい。The expansion ratio of the thermoplastic resin foam sheet is preferably 5 to 50 times in terms of heat insulation and strength.
【００１０】上記熱可塑性樹脂発泡シートの片面に、離
型剤を塗布乾燥することによって離型剤層を形成した後
離型剤層を内側として円筒状に成形し、熱可塑性樹脂発
泡シートの両側面を熱融着することにより、保温チュー
ブが得られる。A mold release agent is applied to one surface of the thermoplastic resin foam sheet and dried to form a mold release agent layer, and then the mold release agent layer is formed into a cylindrical shape with the mold release agent layer inside, and both sides of the thermoplastic resin foam sheet are formed. A heat insulation tube is obtained by heat-sealing the surfaces.
【００１１】上記離型剤としては、例えば、フッ素系又
はシリコーン系液状離型剤が好適に用いられるが、取り
扱いの容易さとコストからシリコーン系の液状離型剤が
より好ましい。上記シリコーン系液状離型剤の熱可塑性
樹脂発泡シートに対する密着性を高めるために、８０〜
１３０℃の高温で焼き付けることが好ましい。As the above-mentioned releasing agent, for example, a fluorine-based or silicone-based liquid releasing agent is preferably used, but a silicone-based liquid releasing agent is more preferable from the viewpoint of easy handling and cost. In order to improve the adhesiveness of the above silicone-based liquid release agent to the thermoplastic resin foam sheet,
It is preferable to bake at a high temperature of 130 ° C.
【００１２】上記シリコーン系の液状離型剤としては、
例えば、縮合反応型シリコーンに、硬化剤として錫系縮
合触媒を添加したものが用いられる。ポリエチレンとの
密着性を向上させるために、密着剤としてアルコキシシ
ラン触媒が併用されてもよい。As the above-mentioned silicone type liquid release agent,
For example, condensation reaction type silicone to which a tin condensation catalyst is added as a curing agent is used. An alkoxysilane catalyst may be used in combination as an adhesive agent in order to improve the adhesiveness with polyethylene.
【００１３】上記シリコーン系の液状離型剤を塗布する
方法は、特に制限はなく、ロールコーティング、スプレ
ー塗布等従来公知の方法が用いられる。また、片面に離
型剤層が積層された熱可塑性樹脂発泡シートを円筒状に
成形する方法及び円筒状に成形した熱可塑性樹脂発泡シ
ートの両側面を熱融着する方法は、特に制限はなく、従
来公知の方法が用いられる。The method of applying the above silicone-based liquid release agent is not particularly limited, and conventionally known methods such as roll coating and spray coating can be used. Further, the method of forming a thermoplastic resin foam sheet having a release agent layer laminated on one side into a cylindrical shape and the method of heat-sealing both side surfaces of the thermoplastic resin foam sheet formed into a cylindrical shape are not particularly limited. A conventionally known method is used.
【００１４】（作用）本発明の保温チューブは、銅管に
よって加熱され、保温チューブ内面が軟化温度を超える
ようなことがあっても、保温チューブ内面に積層された
離型剤層によって、保温チューブと銅管との熱融着が妨
げられるため、銅管に保温チューブがの一部が残存する
ようなトラブルは起こらない。(Function) The heat insulating tube of the present invention is heated by the copper tube, and even if the inner surface of the heat insulating tube exceeds the softening temperature, the heat insulating tube is laminated by the release agent layer laminated on the inner surface of the heat insulating tube. Since heat fusion between the copper tube and the copper tube is hindered, the problem that a part of the heat insulating tube remains on the copper tube does not occur.
【００１５】[0015]
【発明の実施の形態】以下に、実施例を示すが、本発明
はこれによって限定されるものではない。
（実施例１）所定幅のポリエチレン系樹脂発泡シート
（積水化学社製「ソフトロンＳ」、発泡倍率４０倍、厚
み９ｍｍ）の片面に、縮合反応型シリコーン（信越化学
社製「ＫＳ−７１９」）、硬化剤（信越化学社製「ＣＡ
Ｔ−ＰＳ−３」）、密着剤（信越化学社製「ＣＡＴ−Ｐ
Ｄ」）及び希釈剤（レジューサー）を配合したシリコー
ン系液状離型剤を塗布量１５ｇ／ｍ2 で塗布し、遠赤外
ヒーターで表面温度１３０℃まで加熱した後冷却して、
離型剤層を積層した。さらに、このポリエチレン系樹脂
発泡シートを離型剤層を内側にして円筒状に成形した後
両側面を熱融着して、保温チューブを得た。得られた保
温チューブは内面にしわの発生は認められなかった。次
いで、この保温チューブに１５Ａ銅管を挿入し、銅管表
面温度を９０℃に維持して１６８時間放置した直後に保
温チューブを切断して銅管を取り出し、銅管表面を目視
観察したが、発泡シートの部分的な残存は全く認められ
なかった。BEST MODE FOR CARRYING OUT THE INVENTION Examples are shown below, but the present invention is not limited thereto. (Example 1) A condensation reaction type silicone ("KS-719" manufactured by Shin-Etsu Chemical Co., Ltd.) was formed on one surface of a polyethylene resin foam sheet having a predetermined width ("Softlon S" manufactured by Sekisui Chemical Co., Ltd., expansion ratio: 40 times, thickness: 9 mm). ), Curing agent (“CA manufactured by Shin-Etsu Chemical”
T-PS-3 "), adhesive (" CAT-P "manufactured by Shin-Etsu Chemical Co., Ltd.)
D ”) and a diluent (reducer) blended with a silicone-based liquid mold release agent at a coating amount of 15 g / m 2 , heated to a surface temperature of 130 ° C. with a far infrared heater, and then cooled.
A release agent layer was laminated. Further, this polyethylene resin foam sheet was formed into a cylindrical shape with the release agent layer inside, and both side surfaces were heat-sealed to obtain a heat retaining tube. No wrinkles were found on the inner surface of the obtained heat retaining tube. Next, a 15A copper tube was inserted into this heat-retaining tube, the heat-retaining tube was cut immediately after leaving the copper tube surface temperature at 90 ° C. for 168 hours and then the copper tube was taken out, and the copper tube surface was visually observed. No partial remaining of the foamed sheet was observed.
【００１６】（実施例２）実施例１と同様のポリエチレ
ン系樹脂発泡シートの片面に、縮合反応型シリコーン
（信越化学社製「Ｘ−６２−６３０」）及び希釈剤（レ
ジューサー）を配合したシリコーン系液状離型剤を塗布
量２０ｇ／ｍ2 で塗布し、遠赤外ヒーターで表面温度１
３０℃まで加熱した後冷却して、離型剤層を積層した。
上記離型剤層を有するポリエチレン系樹脂発泡シートの
離型剤層を内側にして円筒状に成形した後両側面を熱融
着して、保温チューブに成形した。得られた保温チュー
ブについて実施例１と同様の評価を行ったが、銅管表面
に発泡シートの部分的な残存は全く認められなかった。(Example 2) A condensation reaction type silicone ("X-62-630" manufactured by Shin-Etsu Chemical Co., Ltd.) and a diluent (reducer) were blended on one side of a polyethylene resin foam sheet similar to that of Example 1. A silicone liquid release agent is applied at a coating amount of 20 g / m 2 and a surface temperature of 1 with a far infrared heater.
After heating to 30 ° C. and cooling, a release agent layer was laminated.
The polyethylene resin foam sheet having the above-mentioned release agent layer was formed into a cylindrical shape with the release agent layer inside, and both side surfaces were heat-sealed to form a heat insulating tube. The heat insulation tube thus obtained was evaluated in the same manner as in Example 1, but no partial residual foamed sheet was observed on the surface of the copper tube.
【００１７】（比較例１）実施例１と同様のポリエチレ
ン系樹脂発泡シートに離型剤層を積層することなく、円
筒状に成形した後両側面を熱融着して保温チューブに成
形した。得られた保温チューブについて実施例１と同様
の評価を行ったところ、銅管表面の略全体にわたって発
泡シートの部分的な残存が認められた。Comparative Example 1 A polyethylene resin foam sheet similar to that of Example 1 was formed into a cylindrical shape without laminating a release agent layer, and then both side surfaces were heat-sealed to form a heat insulating tube. When the obtained heat retaining tube was evaluated in the same manner as in Example 1, it was confirmed that the foamed sheet partially remained over substantially the entire surface of the copper tube.
【００１８】（比較例２）実施例１と同様のポリエチレ
ン系樹脂発泡シートの片面に、厚み５０μｍの低密度ポ
リエチレンフィルム（ＭＩ：１０ｇ／１０分、密度：
０．９１４ｇ／ｃｍ 3 ）を加熱して積層し、フィルム積
層面を内側にして円筒状に成形した後両側面を熱融着し
て、保温チューブに成形したところ、フィルムにしわが
数多く発生した。得られた保温チューブについて実施例
１と同様の評価を行ったが、銅管表面に発泡シートやフ
ィルムの部分的な残存は全く認められなかった。(Comparative Example 2) Polyethylene similar to that of Example 1
One side of the foamed resin foam sheet has a low-density porosity of 50 μm.
Polyethylene film (MI: 10 g / 10 minutes, density:
0.914g / cm 3) Is heated and laminated to form a film stack.
After forming a cylindrical shape with the layer surface inside, heat-bond both sides
When it was molded into a heat insulation tube, the film wrinkled.
It happened a lot. Example of the obtained heat insulation tube
The same evaluation as in 1 was performed, but on the copper pipe surface
No partial persistence of the film was observed.
【００１９】[0019]
【発明の効果】本発明の保温チューブ及びその製造方法
は、上述した通りであり、得られた保温チューブは離型
剤層が積層されることによって、円筒状に成形されても
美麗な内面を有し、保温チューブの使用時に内面温度が
軟化温度を超えても、銅管側に熱融着を起こさないの
で、保温チューブを取り替える際に残存した部分を除去
する必要がない。The heat insulating tube and the method for producing the same according to the present invention are as described above. The heat insulating tube thus obtained has a beautiful inner surface even if it is formed into a cylindrical shape by laminating a release agent layer. Even if the inner surface temperature exceeds the softening temperature when the heat insulating tube is used, heat fusion does not occur on the copper tube side, and therefore it is not necessary to remove the remaining portion when replacing the heat insulating tube.
Claims (2)
層が積層され、該離型剤層を内側として円筒状に成形さ
れてなることを特徴とする保温チューブ。1. A heat-retaining tube, characterized in that a release agent layer is laminated on one surface of a thermoplastic resin foamed sheet, and is formed into a cylindrical shape with the release agent layer inside.
を塗布乾燥して離型剤層を設けた後該離型剤層を内側と
して円筒状に成形し、熱可塑性樹脂発泡シートの両側面
を熱融着することを特徴とする保温チューブの製造方
法。2. A thermoplastic resin foam sheet is coated with a mold release agent on one side thereof and dried to form a mold release agent layer, which is then formed into a cylindrical shape with the mold release agent layer inside, and both sides of the thermoplastic resin foam sheet are formed. A method for producing a heat insulating tube, characterized in that the surfaces are heat-sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001331061A JP2003130285A (en) | 2001-10-29 | 2001-10-29 | Heat insulating tube and method of manufacturing the tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001331061A JP2003130285A (en) | 2001-10-29 | 2001-10-29 | Heat insulating tube and method of manufacturing the tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003130285A true JP2003130285A (en) | 2003-05-08 |
Family
ID=19146692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001331061A Pending JP2003130285A (en) | 2001-10-29 | 2001-10-29 | Heat insulating tube and method of manufacturing the tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003130285A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666415B (en) * | 2008-09-03 | 2013-05-15 | 日立空调·家用电器株式会社 | Vacuum heat insulation material, refrigerator and hot water supplier |
-
2001
- 2001-10-29 JP JP2001331061A patent/JP2003130285A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666415B (en) * | 2008-09-03 | 2013-05-15 | 日立空调·家用电器株式会社 | Vacuum heat insulation material, refrigerator and hot water supplier |
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