JPH04164965A - Heat-shrinkable material - Google Patents
Heat-shrinkable materialInfo
- Publication number
- JPH04164965A JPH04164965A JP2292615A JP29261590A JPH04164965A JP H04164965 A JPH04164965 A JP H04164965A JP 2292615 A JP2292615 A JP 2292615A JP 29261590 A JP29261590 A JP 29261590A JP H04164965 A JPH04164965 A JP H04164965A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- rubber
- resin
- metal powder
- shrinkable
- 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
- 239000002654 heat shrinkable material Substances 0.000 title claims description 24
- 229920001971 elastomer Polymers 0.000 claims abstract description 33
- 239000005060 rubber Substances 0.000 claims abstract description 33
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 230000006698 induction Effects 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 2
- 229920002943 EPDM rubber Polymers 0.000 abstract description 2
- 229910000640 Fe alloy Inorganic materials 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 229920002379 silicone rubber Polymers 0.000 abstract description 2
- 239000004945 silicone rubber Substances 0.000 abstract description 2
- 239000010935 stainless steel Substances 0.000 abstract description 2
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 2
- 239000004743 Polypropylene Substances 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920001084 poly(chloroprene) Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ホースのプロテクタ、形状記憶材料等に利用
される熱収縮材料に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat-shrinkable material used for hose protectors, shape memory materials, and the like.
従来、熱収縮チューブ等に使用される熱収縮材料として
は、塩化ビニル樹脂、ポリプロピレン樹脂、ポリアミド
樹脂、フッ素樹脂等の樹脂やエチレン−プロピレン−ジ
エン共重合ゴム（ＥＰＤＭ）、クロロプレンゴム（ＣＲ
）、アクリロニトリル−ブタジェン共重合ゴム（Ｎ Ｂ
Ｒ）等のゴムが使用されている。Conventionally, heat-shrinkable materials used for heat-shrinkable tubes and the like include resins such as vinyl chloride resin, polypropylene resin, polyamide resin, and fluororesin, ethylene-propylene-diene copolymer rubber (EPDM), and chloroprene rubber (CR).
), acrylonitrile-butadiene copolymer rubber (NB
Rubbers such as R) are used.
ところが、上記従来の熱収縮材料は、−船釣に熱伝導率
が低いため、昇温速度が遅く、収縮が完了するまでに時
間がかかるとともに、温度制御がしにくく、しかも例え
ば熱収縮材料によって被覆される被装着物が必要以上に
昇温するという問題点があった。However, the above-mentioned conventional heat-shrinkable materials have low thermal conductivity, have a slow temperature rise rate, take time to complete shrinkage, and are difficult to control temperature. There is a problem in that the temperature of the object to be coated increases more than necessary.
本発明の目的は、熱伝導率が高く、そのため昇温速度が
速く、熱収縮が完了するまでの時間が短縮され、かつ温
度制御が容易で、しかも熱収縮材料によって被覆される
被装着物等が必要以上に昇温するおそれのない熱収縮材
料を提供することにある。It is an object of the present invention to have high thermal conductivity, so the temperature rise rate is fast, the time required to complete heat shrinkage is shortened, and temperature control is easy, and objects to be coated with heat shrinkable material, etc. The object of the present invention is to provide a heat-shrinkable material that does not cause the temperature to rise more than necessary.
上記目的を達成するために、本発明では加熱することに
より収縮する材料であって、樹脂及び／又はゴムに、誘
導加熱可能な金属粉をほぼ均一に配合した熱収縮材料を
その要旨としている。In order to achieve the above object, the present invention focuses on a heat-shrinkable material that shrinks when heated, and that is a heat-shrinkable material in which induction-heatable metal powder is almost uniformly blended with resin and/or rubber.
次に、上記本発明の各構成要件について説明する。Next, each component of the above-mentioned present invention will be explained.
本発明における熱収縮材料の基材は樹脂及び／又はゴム
であって、樹脂としては、塩化ビニル樹脂、ポリエチレ
ン（ＰＥ）、ポリプロピレン（ＰＰ）等があげられる。The base material of the heat-shrinkable material in the present invention is a resin and/or rubber, and examples of the resin include vinyl chloride resin, polyethylene (PE), polypropylene (PP), and the like.
また、ゴムとしては、ＮＢＲ，ＣＲ、シリコンゴム、Ｅ
ＰＤＭ等があげられる。これら樹脂とゴムとは、通常そ
れぞれ単独で用いられるが、それらを混合して用いるこ
ともてきる。その場合、互いに相溶性の良い組合せを選
ぶのが良い。互いの相溶性が悪い場合には、層分離を起
こすなど、樹脂とゴムの各々の特性が十分に発揮されな
いばかりか、例えば熱収縮チューブとしての機能を十分
に果たさないおそれがある。In addition, as rubber, NBR, CR, silicone rubber, E
Examples include PDM. These resins and rubbers are usually used alone, but they can also be used in combination. In that case, it is better to choose combinations that are compatible with each other. If the compatibility with each other is poor, there is a risk that not only the respective properties of the resin and rubber will not be fully exhibited, such as layer separation, but also that the function as a heat-shrinkable tube, for example, will not be fully performed.
これらゴムと樹脂との好適な組合せとしては、例えばＮ
ＢＲと塩化ビニル樹脂、ＣＲと塩化ビニル樹脂、ＥＰＤ
ＭとＰＥ、及びＥＰＤＭとＰＰ等の組合せがあげられる
。Suitable combinations of these rubbers and resins include, for example, N
BR and vinyl chloride resin, CR and vinyl chloride resin, EPD
Examples include combinations of M and PE, and EPDM and PP.
次に、上記樹脂及び／又はゴムに配合される誘導加熱可
能な金属粉は、光や電波等の電磁波を照射することによ
り渦電流が発生して発熱する金属粉であり、例えば鉄、
ステンレス、鉄系合金、アルミニウム、アルミニウム合
金等の粉末があげられる。この誘導加熱可能な金属粉は
、前記樹脂及び／又はゴムに対して数％以下の割合で配
合され、１％以下でもその効果が発揮される。この割合
か数％を越える場合、熱収縮材料の弾力性等の物性が低
下しやすくなる。Next, the induction-heatable metal powder blended into the resin and/or rubber is a metal powder that generates heat by generating eddy currents when irradiated with electromagnetic waves such as light and radio waves. For example, iron,
Examples include powders of stainless steel, iron alloys, aluminum, aluminum alloys, etc. This induction-heatable metal powder is blended in a proportion of several percent or less with respect to the resin and/or rubber, and its effect is exhibited even at a proportion of 1 percent or less. If this ratio exceeds several percent, physical properties such as elasticity of the heat-shrinkable material tend to deteriorate.
本発明のゴム組成物における樹脂やゴムに対し、目的、
用途に応じて発泡剤や耐候性改質剤等の添加剤を適宜添
加してもよい。例えば、発泡剤を添加した場合には、発
泡体でかつ上記の熱収縮特性を有する材料を得ることが
できる。The purpose of the resin and rubber in the rubber composition of the present invention,
Additives such as a foaming agent and a weather resistance modifier may be added as appropriate depending on the purpose. For example, when a foaming agent is added, it is possible to obtain a material that is a foam and has the heat shrinkage characteristics described above.
次に、本発明の熱収縮材料の使用方法について説明する
。まず、樹脂及び／又はゴムに対して所定量の誘導加熱
可能な金属粉を均一に混合する。Next, a method of using the heat-shrinkable material of the present invention will be explained. First, a predetermined amount of induction-heatable metal powder is uniformly mixed with resin and/or rubber.
そして本発明では、通常この熱収縮材料を所定形状、例
えば厚さ数百μｍの筒状に賦形した後、ゴムを使用する
場合には加硫処理を施す。続いて、樹脂又はゴムの軟化
温度以上、分解温度以下の温度で加熱し、賦形した熱収
縮材料を所定の拡張状態まで延伸せしめる。その後、例
えばこの延伸した熱収縮材料を被装着物に装着し、前記
熱収縮材料に電磁波を短時間照射することにより、熱収
縮材料が被装着物に密着した状態で装着される。In the present invention, this heat-shrinkable material is usually formed into a predetermined shape, for example, a cylindrical shape with a thickness of several hundred μm, and then subjected to a vulcanization treatment when rubber is used. Subsequently, the shaped heat-shrinkable material is stretched to a predetermined expanded state by heating at a temperature higher than the softening temperature of the resin or rubber and lower than the decomposition temperature. Thereafter, for example, the stretched heat-shrinkable material is attached to an object, and the heat-shrinkable material is irradiated with electromagnetic waves for a short period of time, so that the heat-shrinkable material is attached to the object in close contact with the object.
前記構成により、樹脂及び／又はゴムに誘導加熱可能な
金属粉が配合され、例えば円筒形状に賦形され、加熱さ
れることによって所定の大きさまで拡径されて熱収縮材
料が形成され、この熱収縮材料に例えば電磁波が照射さ
れると熱収縮材料中の金属粉のみが渦電流によって速や
かに発熱し、熱収縮材料全体が加熱されることにより、
熱収縮材料が元の形状まで収縮する。According to the above structure, metal powder that can be heated by induction is mixed with resin and/or rubber, shaped into, for example, a cylindrical shape, and expanded to a predetermined size by heating to form a heat-shrinkable material. For example, when a shrinkable material is irradiated with electromagnetic waves, only the metal powder in the heat-shrinkable material quickly generates heat due to eddy current, and the entire heat-shrinkable material is heated.
The heat shrink material shrinks to its original shape.
以下に、本発明をゴムホースのプロテクタに具体化した
実施例を第１〜３図に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a protector for a rubber hose will be described below with reference to FIGS. 1 to 3.
まず、ＥＰＤＭ１００重量部に対し、鉄粉５重量部及び
加硫剤等の添加剤を配合して均一に混合した。なお、鉄
粉は均一に混合しないと発熱が不均一になり、熱収縮性
能が低下する。また、ＥＰＤＭの加硫反応への影響を少
なくするために、鉄粉の粒子径を０．０５〜０．１ｍｍ
と少し大きくした。なお、鉄粉の粒子形状は、混合時の
分散性の点からは球状の方が好ましい。次いで、この組
成物を賦形することにより、第２図に示すような薄い円
筒形状の未延伸成形物１を得た。次いで、加熱により加
硫処理を行った。First, 5 parts by weight of iron powder and additives such as a vulcanizing agent were mixed uniformly with 100 parts by weight of EPDM. Note that if the iron powder is not mixed uniformly, heat generation will be uneven and heat shrinkage performance will deteriorate. In addition, in order to reduce the influence on the vulcanization reaction of EPDM, the particle size of the iron powder was adjusted to 0.05 to 0.1 mm.
I made it a little bigger. In addition, the particle shape of the iron powder is preferably spherical from the viewpoint of dispersibility during mixing. Next, by shaping this composition, a thin cylindrical unstretched molded article 1 as shown in FIG. 2 was obtained. Next, vulcanization treatment was performed by heating.
次に、第１図に示すように、前記未延伸成形物１を１５
０℃の温度に加熱して拡径し、円筒の内径を未延伸成形
物ｌの内径に対し、１．７５倍とした。そして、前記拡
径状態で２０°Ｃまで冷却し、完全に固化させることに
より、熱収縮材料としての熱収縮チューブ２を得た。Next, as shown in FIG.
The diameter was expanded by heating to a temperature of 0° C., and the inner diameter of the cylinder was made 1.75 times the inner diameter of the unstretched molded product 1. Then, the expanded diameter state was cooled to 20° C. and completely solidified, thereby obtaining a heat-shrinkable tube 2 as a heat-shrinkable material.
次いで、この熱収縮チューブ２の挿通孔３内に、外径が
前記未延伸成形物１の内径よりやや大きいゴムホース４
を挿入し、電磁波照射装置５から周波数９ＭＨｚ、電流
７Ａの電磁波を照射する。この電磁波の照射により、熱
収縮チューブ２は１５０℃の温度に上昇し、熱収縮処理
が施される。すると、第３図に示すように、熱収縮チュ
ーブ２は収縮し、その結果、前記未延伸時の形状にまで
回復し、ゴムホース４の外周部に装着された。Next, a rubber hose 4 whose outer diameter is slightly larger than the inner diameter of the unstretched molded product 1 is inserted into the insertion hole 3 of the heat-shrinkable tube 2.
is inserted, and the electromagnetic wave irradiation device 5 irradiates electromagnetic waves with a frequency of 9 MHz and a current of 7 A. By irradiating this electromagnetic wave, the temperature of the heat-shrinkable tube 2 rises to 150° C., and heat-shrinkage treatment is performed. Then, as shown in FIG. 3, the heat-shrinkable tube 2 was shrunk and, as a result, recovered to its unstretched shape and was attached to the outer periphery of the rubber hose 4.
このとき、熱収縮チューブ２には、熱伝導率の高い鉄粉
が均一に配合されているので、熱収縮チューブ２の昇温
速度は速く、約５秒で熱収縮チューブ２の収縮が完了し
た。At this time, since iron powder with high thermal conductivity is evenly mixed in the heat-shrinkable tube 2, the heating rate of the heat-shrinkable tube 2 is fast, and the shrinkage of the heat-shrinkable tube 2 is completed in about 5 seconds. .
そして、前記ゴムホース４の外周部に装着された熱収縮
チューブ２は、ゴム弾性を有しプロテクタとしての機能
を十分に発揮することができた。The heat-shrinkable tube 2 attached to the outer periphery of the rubber hose 4 had rubber elasticity and could fully function as a protector.
また、熱収縮チューブ２としてＥＰＤＭの発泡体を使用
した場合には、熱収縮チューブ２は１５０℃の温度に速
やかに上昇し、前記未発泡のものより長いが、約１０秒
で熱収縮が完了した。Furthermore, when EPDM foam is used as the heat-shrinkable tube 2, the heat-shrinkable tube 2 quickly rises to a temperature of 150°C, and the heat-shrinkable tube 2 completes heat shrinkage in about 10 seconds, although it is longer than the non-foamed one. did.
上記のように、熱収縮チューブ２に誘導加熱可能な金属
粉をほぼ均一に配合し、熱収縮チューブ２を収縮させる
手段として電磁波を用いたので、電磁波の照射で熱収縮
チューブ２内の金属粉が速やかに発熱し、それによって
熱収縮チューブ２が収縮し、収縮完了までの時間が短縮
される。また、加熱手段として電磁波による方法を採用
したので、上記のように加熱速度が速く、しかも電磁波
の強度を変えることにより、昇温速度が調整でき、従っ
て従来の加熱方法に比べて温度制御か容易である。さら
に、電磁波により熱収縮チューブ２内の金属粉のみか発
熱し、樹脂及び／又はゴムは発熱せず、被装着物である
ゴムホース４自体を直接加熱することなく、従ってゴム
ホース４には熱収縮チューブ２内の金属粉から熱収縮チ
ューブ２の樹脂及び／又はゴムを経た伝熱のみで加熱さ
れるため、ゴムホース４の性能を劣化させるおそれはな
い。As mentioned above, since the heat-shrinkable tube 2 is almost uniformly mixed with metal powder that can be heated by induction, and electromagnetic waves are used as a means to shrink the heat-shrinkable tube 2, the metal powder inside the heat-shrinkable tube 2 is quickly generates heat, which causes the heat shrinkable tube 2 to shrink, shortening the time it takes to complete the shrinkage. In addition, since we adopted a method using electromagnetic waves as the heating means, the heating rate is fast as described above, and the temperature increase rate can be adjusted by changing the intensity of the electromagnetic waves, making temperature control easier than with conventional heating methods. It is. Furthermore, only the metal powder inside the heat shrink tube 2 generates heat due to electromagnetic waves, but the resin and/or rubber do not generate heat, and the rubber hose 4 itself, which is the object to be attached, is not directly heated. There is no risk of deteriorating the performance of the rubber hose 4 because it is heated only by heat transfer from the metal powder in the heat shrink tube 2 through the resin and/or rubber of the heat shrink tube 2.
本発明の熱収縮材料は、熱伝導率が高いため、昇温速度
が一層速（なり、熱収縮が完了するまでの時間が短縮さ
れるとともに、熱収縮材料によって被覆される被装着物
等が必要以上に昇温するおそれがないという効果を奏す
る。Since the heat-shrinkable material of the present invention has a high thermal conductivity, the temperature rise rate is faster (the time required to complete heat-shrinkage is shortened, and the objects to be covered with the heat-shrinkable material are This has the effect that there is no risk of the temperature rising more than necessary.
第１〜３図は本発明の実施例を示す図であって、第１図
は延伸した熱収縮チューブにゴムホースを装着する状態
を示す斜視図、第２図は延伸する前の熱収縮チューブを
示す斜視図、第３図は熱収縮チューブをゴムホースに装
着した状態を示す斜視図である。
２・・・熱収縮材料としての熱収縮チューブ。Figures 1 to 3 are views showing embodiments of the present invention, in which Figure 1 is a perspective view showing a state in which a rubber hose is attached to a stretched heat-shrinkable tube, and Figure 2 is a diagram showing the heat-shrinkable tube before being stretched. FIG. 3 is a perspective view showing a state in which a heat shrinkable tube is attached to a rubber hose. 2...Heat-shrinkable tube as a heat-shrinkable material.
Claims (1)
び／又はゴムに、誘導加熱可能な金属粉をほぼ均一に配
合したことを特徴とする熱収縮材料。1. A heat-shrinkable material that shrinks when heated, and is characterized in that metal powder that can be heated by induction is almost uniformly blended with resin and/or rubber.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2292615A JPH04164965A (en) | 1990-10-29 | 1990-10-29 | Heat-shrinkable material |
| US07/782,548 US5322901A (en) | 1990-10-29 | 1991-10-25 | Resin or rubber composition having good heat shrinkability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2292615A JPH04164965A (en) | 1990-10-29 | 1990-10-29 | Heat-shrinkable material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04164965A true JPH04164965A (en) | 1992-06-10 |
Family
ID=17784094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2292615A Pending JPH04164965A (en) | 1990-10-29 | 1990-10-29 | Heat-shrinkable material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04164965A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008014531A1 (en) * | 2006-08-02 | 2008-02-07 | Miba Gleitlager Gmbh | Anti-friction lacquer |
-
1990
- 1990-10-29 JP JP2292615A patent/JPH04164965A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090305916A1 (en) * | 2006-07-29 | 2009-12-10 | Ixetic Mac Gmbh | Anti-friction lacquer |
| WO2008014531A1 (en) * | 2006-08-02 | 2008-02-07 | Miba Gleitlager Gmbh | Anti-friction lacquer |
| US8324138B2 (en) | 2006-08-02 | 2012-12-04 | Miba Gleitlager Gmbh | Anti-friction lacquer |
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