JPS63257623A - Heat-shrinkable tube and manufacture thereof - Google Patents
Heat-shrinkable tube and manufacture thereofInfo
- Publication number
- JPS63257623A JPS63257623A JP9275187A JP9275187A JPS63257623A JP S63257623 A JPS63257623 A JP S63257623A JP 9275187 A JP9275187 A JP 9275187A JP 9275187 A JP9275187 A JP 9275187A JP S63257623 A JPS63257623 A JP S63257623A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat
- heat shrinkage
- outer diameter
- annular nozzle
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 4
- 239000000057 synthetic resin Substances 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005476 soldering Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 241000282994 Cervidae Species 0.000 description 1
- 244000007835 Cyamopsis tetragonoloba Species 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Insulating Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、高温状態に置かれ易い電気部品等を被覆する
ための熱収縮チューブおよびその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat-shrinkable tube for covering electrical parts and the like that are likely to be exposed to high temperatures, and a method for manufacturing the same.
（従来の技術）
従来、第１図に断面図を示すよ５にコンデンサー等の電
気部品／に熱収縮チューブ２を被覆して絶縁したものが
広く利用されている。そしてこれらの電気部品は、被覆
後も高温状態に置かれ易く、その際被覆した熱収縮チュ
ーブユがし
さらに収縮を起こ客て、第２〜７図に断面図を示すよう
に肩部１７が露出し易い欠点があった。(Prior Art) Conventionally, electrical components such as capacitors are insulated by being covered with a heat-shrinkable tube 2, as shown in the cross-sectional view of FIG. 1. These electrical components are likely to be left in a high temperature state even after being coated, and in this case, the coated heat-shrinkable tube may shrink further, exposing the shoulder 17 as shown in cross-sectional views in Figures 2 to 7. It had some drawbacks.
そして、これを改良するために、１００℃における縦方
向の熱収縮率の小さい熱収縮チューブを使用することが
提案されている。（特開昭、！ｔ ｊ −４３グ０７号
）
（発明が解決しようとする問題点）
しかしながら、上記従来の方法では、高温状態に置かれ
た時の肩部の露出を防止するには、未だ不充分であった
。In order to improve this problem, it has been proposed to use a heat shrink tube that has a small longitudinal heat shrinkage rate at 100°C. (Unexamined Japanese Patent Publication No. 07-07-43) (Problems to be Solved by the Invention) However, in the above conventional method, in order to prevent the shoulder from being exposed when placed in a high temperature condition, It was still insufficient.
（問題点全解決するための手段）
本発明者らは、ハンダ付工程等においては、電気部品が
予想外の高温（／ｓｏ−，２ｏｏ℃）となり、被覆した
熱収縮チューブがさらに収縮を生ずる点を見出し、熱収
縮チューブの高温収縮特性に着目して本発明に到達した
ものであり、その要旨は、
（１） １３０℃における横方向熱収縮率■１．。が、
？７〜！；０％、縦方向熱収縮率Ｐ１ｍＯが５〜／Ｓ％
テあシ、１３０℃を越え２００″′ｃ″！、での各温度
の横方向熱収縮率ｖ１．。−＋２１１０が７１３８以上
であることを特徴とする熱収縮チューブ
（２）合成樹脂を環状口金から溶融押出した原チューブ
に内圧をかけて該原チューブを前記環状口金の外径以上
の外径を保ちながら製造し、該原チューブを軟化点以上
１３０℃以下の温度下で径方向に７．５ざ〜−倍、縦方
向に八〇Ｓ〜／、／ざ倍に延伸することを特徴とする熱
収縮チューブの製造方法。(Means for Solving All Problems) The present inventors discovered that during the soldering process, etc., electrical components reach unexpectedly high temperatures (/so-, 2oo degrees Celsius), causing the covered heat shrink tube to further shrink. The present invention was developed by focusing on the high-temperature shrinkage characteristics of heat-shrinkable tubes. . but,
? 7~! ;0%, longitudinal heat shrinkage rate P1mO is 5~/S%
Teashi, over 130℃ and 200″'c″! , the lateral heat shrinkage rate v1. at each temperature. . - A heat-shrinkable tube characterized in that +2110 is 7138 or more (2) Internal pressure is applied to a raw tube obtained by melting and extruding a synthetic resin from an annular mouthpiece to maintain an outer diameter equal to or greater than the outer diameter of the annular mouthpiece. The raw tube is stretched by 7.5 to - times in the radial direction and by 80 to /, / times in the longitudinal direction at a temperature above the softening point and below 130°C. How to make shrink tubing.
に存する。exists in
なお第７図は、熱収縮チューブを良好に被覆した状態の
コンデンサーを示す一部切り欠いた正面図、第二一り図
は高温状態で肩部が露出した状態を示す一部切り欠いた
正面図、第Ｓ図は本発明の熱収縮チューブを製造する装
置の一例を示す正面断面図である。Figure 7 is a partially cutaway front view showing the condenser well covered with heat shrink tube, and Figure 2 is a partially cutaway front view showing the shoulder exposed at high temperature. 1 and 2 are front sectional views showing an example of an apparatus for manufacturing a heat-shrinkable tube according to the present invention.
１３０℃における横方向熱収縮率ｖ１．。が３７％よシ
小さいとコンデンサーの肩部を確実に被覆することが困
難であシ、一方ｓθ％を越えるものは製造が難かしい。Transverse heat shrinkage rate v1 at 130°C. . If sθ% is smaller than 37%, it is difficult to reliably cover the shoulders of the capacitor, while if it exceeds sθ%, it is difficult to manufacture.
１３０℃における縦方向熱収縮率ｐｅｓｏがりＳより小
さいものは製造困難であシ、ｉｚｘよシも大きいと、収
縮被覆時に縦に縮み過ぎて肩部が確実に被覆できない。If the longitudinal heat shrinkage rate at 130° C. is smaller than peso, it is difficult to manufacture, and if izx is too large, it will shrink too much vertically during shrink coating, making it impossible to reliably cover the shoulders.
本発明の最大の特徴は、／、３０℃以上２００℃までの
各温度における横方向熱収縮率ｖ１ｍＧ−＋２００
が、ｉ３ｏ℃における横方向熱収縮率■１３゜以上であ
る点にある。このことにより、肩部露出の防止に効果の
ある理由は明らかでないが、高温においても横方向に収
縮力を残しているので、縦方向にさらに収縮しようとし
ても抵抗になシ、肩部が露出しないものと考えられる。The greatest feature of the present invention is that the lateral heat shrinkage rate v1mG-+200 at each temperature from 30℃ to 200℃
However, the lateral heat shrinkage rate at i3oC is 13 degrees or more. Although it is not clear why this is effective in preventing shoulder exposure, it retains contraction force in the horizontal direction even at high temperatures, so even if it tries to contract further in the vertical direction, there is no resistance and the shoulder is exposed. It is thought that it will not.
この傾向は特にポリ塩化ビニル熱収縮チューブに顕著で
あるので、以下、ポリ塩化ビニル熱収縮チューブを例に
挙げて説明する。This tendency is particularly noticeable in heat-shrinkable polyvinyl chloride tubes, so the explanation will be given below using heat-shrinkable polyvinyl chloride tubes as an example.
また、高温における横方向熱収縮率ｖＩ Ｓｏ −＋
１゜。Also, the lateral heat shrinkage rate vI So −+ at high temperature
1°.
があまり大きくても、ポリ塩化ビニル熱収縮チューブの
場合等にはその温度での強度との関連でチューブに亀裂
が生ずる恐れがあるので。Even if the temperature is too large, cracks may occur in the tube due to its strength at that temperature, such as in the case of polyvinyl chloride heat-shrinkable tubes.
／ｋＯ℃において、（ｖ、、ｏ＋ｒ ）％以下、ｌざ０
℃において（Ｖｌ、。＋ＩＯ）Ｘ以下、２００℃におい
て（ｖｌ、。十／ ｓ ） Ｘ以下が好ましい。/kO℃, (v,,o+r)% or less, lza0
It is preferably (Vl, .+IO)X or less at °C, and (vl, .10/s)X or less at 200°C.
さらに、縦方向熱収縮率ＰＩｍＯ−＋２゜。は高温にお
いて、１３０℃における縦方向熱収縮率ｐｅｓｏよシ小
さくすることは製造上困難なのでｐｕｓ。以上が好まし
く、また太き過ぎると、横方向の収縮応力に打ち勝って
、肩部が露出するおそれも出てくるので、ｉｒｏ℃にお
いて（Ｐｔｉｇ＋２０）Ｘ以下、１１０℃において（Ｐ
ｌ、。十グθ）Ｘ以下、λｏｏ℃において（Ｐ＋ｓｏ＋
ｊＯ）Ｘ以下が好ましい。Furthermore, the longitudinal heat shrinkage rate is PImO-+2°. It is difficult to make the longitudinal heat shrinkage rate smaller than peso at 130°C at high temperatures, so it is pus. The above is preferable, and if it is too thick, there is a risk that the shoulders will be exposed by overcoming the contraction stress in the lateral direction.
l. Below 10g θ)X, at λoo℃ (P+so+
jO)X or less is preferable.
ここで製造につき説明をすると、従来の熱収縮チューブ
においては、第Ｓ図に示す環状口金３から押出された直
後の高温で柔軟な原チューブ２１は内部が外気と連通し
て内圧がかかつていないので、引き取シカにより縮径す
る。この高温押出時における縮径歪が、熱収縮チューブ
においては高温における拡径成分として残シ、その停機
方向熱収縮率が低下するものと考えられる。To explain the manufacturing process here, in the conventional heat shrinkable tube, the inside of the raw tube 21, which is flexible at high temperature immediately after being extruded from the annular mouthpiece 3 shown in Fig. S, communicates with the outside air and the internal pressure does not rise. Therefore, the diameter will be reduced depending on the deer being taken. It is thought that this diametrical strain during high-temperature extrusion remains in the heat-shrinkable tube as a radial-expanding component at high temperatures, reducing its heat shrinkage rate in the stop direction.
そこで１本発明の高温における横方向収縮率Ｖ１３０−
）２０Ｇがｖ１３゜以上である熱収縮チューブを得るた
めには、第３図に示す、延伸工程前の押出工程において
、環状口金３から溶融押出された原チューブ２１を引き
取る際に、環状口金中心部に連通した送気管りから内圧
をかげて外径が縮小しないようにあるいはやや拡径しな
がらニップロー、四６によシ引き取シ、冷却装置Ｓによ
シ冷却固化すれば良い。この拡径は、八−倍以内に仰え
て、高温時の横方向収縮率があまり大きくならないよう
にするのが好ましい。Therefore, the lateral shrinkage rate at high temperature of the present invention V130-
) In order to obtain a heat-shrinkable tube whose 20G is v13° or more, in the extrusion process before the stretching process shown in FIG. The material may be cooled and solidified using a nip row, a four-six, and a cooling device S by increasing the internal pressure from the air supply pipe communicating with the part to prevent the outer diameter from decreasing or slightly expanding the outer diameter. This diameter expansion is preferably within 8 times so that the lateral shrinkage rate at high temperatures does not become too large.
この時縦方向には張力をなるべくかけずに２倍以下の伸
張率で引き取ることにより、高温における縦方向熱収縮
率Ｐ ｌ ３０−＋ ２００がｐｌｌｏよりあまり大き
くならないように調整するのが好ましい。At this time, it is preferable to adjust the longitudinal heat shrinkage rate P l 30-+ 200 at high temperature so that it is not much larger than pllo by applying as little tension as possible in the longitudinal direction and drawing at a stretching rate of 2 times or less.
押出し直後から、チューブをベルトコンベア上に載せる
等により、張力ｆＯにすれば・ＰＩ３０→２００がほぼ
ＰＩ１３０と等しくなり、高温条件下での電気部品の肩
部が露出する恐れがなくなるので好ましい。Immediately after extrusion, by placing the tube on a belt conveyor or the like, the tension is set to fO, which is preferable because PI30→200 becomes approximately equal to PI130 and there is no risk of exposing the shoulders of electrical components under high temperature conditions.
こうして得られた原チューブコ／をニップロール６と引
き取りロールごとの間でチューブ内に加圧空気を封じ込
めた状態で、温水シャワー７あるいはヒーター等により
軟化点乃至１３０℃の温度に加熱軟化させて、径方向に
約ハｓｇ〜−倍、縦方向に約７．０ｓ〜ノ、７ｇ倍延伸
することによυ本発明の熱収縮チューブλが得られる。With pressurized air sealed in the tube between the nip roll 6 and each take-up roll, the raw tube coater thus obtained is softened by heating to a temperature between the softening point and 130°C using a hot water shower 7 or a heater, etc. The heat-shrinkable tube λ of the present invention is obtained by stretching the tube by approximately 7.0 s to 7 g in the direction and by approximately 7.0 s to 7 g in the longitudinal direction.
（発明の効果）
以上、説明した如く本発明の熱収縮チューブおよびその
製造方法によれば、被覆作業時には電気部品を肩部まで
確実に被覆することができるとともて、被覆後の電気部
品が高温下に置かれた場合でも、肩部が露出するおそれ
がないなど優れた特徴を有する熱収縮チューブが得られ
る。(Effects of the Invention) As explained above, according to the heat-shrinkable tube and the manufacturing method thereof of the present invention, it is possible to reliably cover electrical components up to the shoulders during coating work, and the electrical components after coating are A heat-shrinkable tube with excellent features such as no risk of exposing its shoulders even when placed under high temperatures can be obtained.
（実施例および比較例）
平均重合度Ｐが／θθＯのポリ塩化ビニルｉｏｏ重量部
に可塑剤７３重量部、鉛系安定剤３重量部を混合した組
成物（比重ハ３５）を下記条件で環状口金から約、２０
０℃で溶融押し出して水冷し、外径５Ｉ＋Ｉ１１の下記
原チューブＡ、Ｂ。(Examples and Comparative Examples) A composition (specific gravity: 35) in which 73 parts by weight of a plasticizer and 3 parts by weight of a lead-based stabilizer were mixed with ioo parts by weight of polyvinyl chloride having an average degree of polymerization P of /θθO was cyclically prepared under the following conditions. Approximately 20 from the base
The following raw tubes A and B were melted and extruded at 0°C and cooled with water, and had an outer diameter of 5I+I11.
Ｃを得た。I got a C.
原チューブＡ（実施例）：口金外径り、コ園、リップ間
隔０．３ ｍの環状口金から押出量ｙ、ｏｋｇ／時間、
引き取シ速度２０ｍ／分、内圧（外気に対する正圧）２
００ｍＡｑで外径ｈｉで拡径しながら引き取り、２０℃
で水冷した。Raw tube A (example): Extrusion amount y, ok/hour,
Pick-up speed 20m/min, internal pressure (positive pressure relative to outside air) 2
At 00mAq, take it out while expanding the outer diameter at hi, and heat it at 20℃.
It was water cooled.
原チューブＢ（実施例）二ロ金外径！ｒｍ、リップ間隔
０．ｌＩｒｍの環状口金から押出量ｔａ、Ｏｋｇ ／時
間、引き取り速度、２０ｍ７分、内圧ｌざ０鵡Ａｑ で
外径５ｌｌＩＩ＋に保ちながら引き取り、２０℃で水冷
した。Original tube B (Example) Double gold outer diameter! rm, lip spacing 0. The product was withdrawn from an annular mouthpiece of a lIrm at an extrusion amount ta of 0 kg/hour, a take-up speed of 20 m7 minutes, an internal pressure of 10 mAq, and an outer diameter of 5 lII+, and cooled with water at 20°C.
原チューブＣ（比較例）二ロ金外径Ａｔａｓ、リップ間
隔０．３！ｍｓの環状口金から押出量ｔｔｔ、ｏｋｇ／
時間、引き取り速度−〇ｍ７分、分圧内圧く外気と連通
）で、外径ｓｍ−ｚで縮径させ左から引き取り、２０℃
で水冷した。Original tube C (comparative example) Double gold outer diameter Atas, lip spacing 0.3! The amount of extrusion from the ms annular die is ttt, ok/
Time, take-up speed -〇m7 minutes, partial pressure internal pressure (communicate with outside air), reduce the outer diameter sm-z and take it from the left, 20℃
It was water cooled.
次に、上記原チューブＡ、Ｂ、Ｃを第Ｓ図に示す延伸装
置を用いて、延伸温度１００℃で縦方向にへ／倍に延伸
しながら、外径９Ｉ！ＩＩ！、肉厚０．０９ 頓になる
ように横方向に延伸し、原チューブＡ、Ｂ、Ｃに対応す
る熱収縮チューブ入１Ｂ、Ｃ全得た。その各温度におけ
る収縮率は第１表に示すとおりである。Next, the raw tubes A, B, and C were stretched in the longitudinal direction to double the length at a stretching temperature of 100° C. using the stretching device shown in FIG. II! The tubes were stretched in the transverse direction so that the wall thickness was 0.09 mm, and heat-shrinkable tubes 1B and C corresponding to the original tubes A, B, and C were obtained. The shrinkage rate at each temperature is shown in Table 1.
熱収縮率は各温度のオイルバスに７分間浸漬した時のも
のである。The heat shrinkage rates are those obtained when immersed in an oil bath at each temperature for 7 minutes.
得られた熱収縮チューブＡ１Ｂ、Ｃを長さ／３＋＋ＩＩ
Ｉ＋に切断し、外径ｇ順、高さ７ノ咽のコンデンサに嵌
挿し、２！Ｏ℃の熱風トンネルでＳ秒間加熱したところ
、いずれの熱収縮チューブも良好に収縮密着して第７図
に示すような被覆コンデンサーが得られた。The length of the obtained heat shrink tubes A1B and C is /3++II
Cut it to I+, fit it into a capacitor with an outer diameter of g and a height of 7 mm, 2! When heated for S seconds in a hot air tunnel at 0.degree. C., all the heat-shrinkable tubes were well shrunk and adhered to each other, resulting in a coated capacitor as shown in FIG. 7.
この被覆コンテンサーを、２００℃のギアオーブンに一
分間放置した後、観察し第λ〜ｑ図に示すような肩部／
ノが露出した状態になったかどうか’（ｒｆＰ価した。After leaving this coated condenser in a gear oven at 200°C for one minute, it was observed and the shoulders/containers as shown in Figs.
Is there an exposed condition? (rfP value)
それぞれ１００ｉａｌずつテストして、肩部が露出した
ものが７００（回申何個になるかを第−表に示した。100 ials were tested for each, and the number with exposed shoulders was 700 ials (the number of tests is shown in Table 1).
第 二 表
第、２表から明らかなように、熱収縮チューブＡ％Ｂ１
Ｃのいずれも、１３０℃における横方向熱収縮率Ｖ１
３０がびりえと３７〜ｊＯ３の範囲に収まっており、同
じく縦方向の熱収縮率ｐｔｓ。As is clear from Tables 2 and 2, heat shrink tube A%B1
Both of C have a lateral heat shrinkage rate V1 at 130°C.
30 is within the range of 37~jO3, and the longitudinal heat shrinkage rate is also pts.
が１０−１１％とｊ−／！ｒ％の範囲に収まっているの
で、加熱により第７図に示すような良好な被覆コンデン
サーが得られる。is 10-11% and j-/! Since it is within the range of r%, a good coated capacitor as shown in FIG. 7 can be obtained by heating.
そして、７Ｓθ℃〜コθＯ℃の横方向熱収縮率が、熱収
縮チューブＡがグア〜ｒ３！Ｘ、’Ａ収縮チューブＢが
ｑｑｚといずれも■１．。＝−ｃ ｔｔｘ以上であるの
でｓ Ｖ１３Ｇ−＋！。。が■１．。以上の条件に合致
し、２００℃の雰囲気に１分間放置しても。And, the lateral heat shrinkage rate of 7Sθ°C to θO°C of heat shrink tube A is guar~r3! X, 'A shrink tube B is qqz, both ■1. . = -c ttx or more, so s V13G-+! . . ■1. . Even if the above conditions are met and the product is left in an atmosphere at 200°C for 1 minute.
全く肩が露出することがない。No shoulders are exposed at all.
一方、熱収縮チューブＣはｌ！θ℃〜２００℃の横方向
熱収縮率がｌＩコ〜３３ｘとＶ１３０＝ｌＩダ％よりも
小さくなっているため、２００℃の雰囲気に１分間放置
すると縦収縮を抑制し切れず、１００個すべてが第２〜
９図に示すように肩部／ｌの露出が生ずる。On the other hand, heat shrink tube C is l! Since the transverse heat shrinkage rate from θ℃ to 200℃ is smaller than lIko~33x and V130=lIda%, when left in an atmosphere of 200℃ for 1 minute, the longitudinal shrinkage cannot be suppressed completely, and all 100 pieces is the second ~
As shown in FIG. 9, the shoulder/l is exposed.
壮哄第１図は熱収縮チューブを良好に被覆した状態のコ
ンデンサーを示す一部切シ欠いた正面図、第一〜グ図は
高温状態で肩部が露出した状態を示す一部切り欠いた正
面図、第５図は本発明の熱収縮チューブを製造する装置
の一例を示す正面断面図である。
ｌ・・・・・・電気部品 コ・・・・・・熱収縮チュ
ーブ特許出願人 三菱樹脂株式会社７−１
代理人弁理士近藤久美（，１，□
−′」−１’Figure 1 is a partially cutaway front view showing the capacitor well covered with heat shrink tubing, and Figures 1 to 3 are partially cutaways showing the shoulder exposed at high temperatures. A front view and FIG. 5 are front sectional views showing an example of an apparatus for manufacturing a heat-shrinkable tube of the present invention. l...Electrical parts C...Heat shrink tube patent applicant Mitsubishi Plastics Co., Ltd. 7-1 Representative patent attorney Kumi Kondo (,1,□ -'"-1'
Claims (2)
が３７〜５０％、縦方向熱収縮率Ｐ１＿３＿０が５〜１
５％であり、１３０℃を越え２００℃までの各温度の横
方向熱収縮率Ｖ＿１＿３＿０＿→＿２＿０＿０がＶ＿１
＿３＿０以上であることを特徴とする熱収縮チューブ(1) Lateral heat shrinkage rate at 130°C V_1_3_0
is 37-50%, longitudinal heat shrinkage P1_3_0 is 5-1
5%, and the lateral heat shrinkage rate V_1_3_0_→_2_0_0 at each temperature exceeding 130°C and up to 200°C is V_1
A heat shrink tube characterized by having a temperature of _3_0 or more
に内圧をかけて該原チューブを前記環状口金の外径以上
の外径を保ちながら製造し、該原チューブを軟化点以上
１３０℃以下の温度下で径方向に０．５８〜２倍、縦方
向に１．０５〜１．１８倍に延伸することを特徴とする
熱収縮チューブの製造方法。(2) Manufacture the raw tube by applying internal pressure to the raw tube obtained by melting and extruding the synthetic resin from the annular mouthpiece while maintaining an outer diameter equal to or greater than the outer diameter of the annular mouthpiece. A method for producing a heat-shrinkable tube, which comprises stretching the tube 0.58 to 2 times in the radial direction and 1.05 to 1.18 times in the longitudinal direction at a temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62092751A JPH0720668B2 (en) | 1987-04-15 | 1987-04-15 | Heat shrinkable tube and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62092751A JPH0720668B2 (en) | 1987-04-15 | 1987-04-15 | Heat shrinkable tube and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63257623A true JPS63257623A (en) | 1988-10-25 |
| JPH0720668B2 JPH0720668B2 (en) | 1995-03-08 |
Family
ID=14063121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62092751A Expired - Fee Related JPH0720668B2 (en) | 1987-04-15 | 1987-04-15 | Heat shrinkable tube and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720668B2 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49128977A (en) * | 1973-04-12 | 1974-12-10 | ||
| JPS5073965A (en) * | 1973-10-31 | 1975-06-18 | ||
| JPS5553527A (en) * | 1978-10-16 | 1980-04-19 | Mitsubishi Plastics Ind Ltd | Method of reducing shrinking percentage of heat shrinking synthetic resin tube |
| JPS5653042A (en) * | 1979-10-09 | 1981-05-12 | Mitsubishi Plastics Ind Ltd | Production of heat-shrinkable tube |
| JPS595097A (en) * | 1982-07-02 | 1984-01-11 | Nec Corp | Optical recording system |
| JPS5952054A (en) * | 1982-07-05 | 1984-03-26 | 松下電工株式会社 | Building panel |
| JPS60262537A (en) * | 1984-06-07 | 1985-12-25 | 三菱樹脂株式会社 | Pvc heat-shrinkable tube for covering cut flower |
| JPS6130897A (en) * | 1984-07-23 | 1986-02-13 | Foster Denki Kk | Manufacture of flat diaphragm speaker |
-
1987
- 1987-04-15 JP JP62092751A patent/JPH0720668B2/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49128977A (en) * | 1973-04-12 | 1974-12-10 | ||
| JPS5073965A (en) * | 1973-10-31 | 1975-06-18 | ||
| JPS5553527A (en) * | 1978-10-16 | 1980-04-19 | Mitsubishi Plastics Ind Ltd | Method of reducing shrinking percentage of heat shrinking synthetic resin tube |
| JPS5653042A (en) * | 1979-10-09 | 1981-05-12 | Mitsubishi Plastics Ind Ltd | Production of heat-shrinkable tube |
| JPS595097A (en) * | 1982-07-02 | 1984-01-11 | Nec Corp | Optical recording system |
| JPS5952054A (en) * | 1982-07-05 | 1984-03-26 | 松下電工株式会社 | Building panel |
| JPS60262537A (en) * | 1984-06-07 | 1985-12-25 | 三菱樹脂株式会社 | Pvc heat-shrinkable tube for covering cut flower |
| JPS6130897A (en) * | 1984-07-23 | 1986-02-13 | Foster Denki Kk | Manufacture of flat diaphragm speaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0720668B2 (en) | 1995-03-08 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |