JPH0572254B2 - - Google Patents
Info
- Publication number
- JPH0572254B2 JPH0572254B2 JP1922386A JP1922386A JPH0572254B2 JP H0572254 B2 JPH0572254 B2 JP H0572254B2 JP 1922386 A JP1922386 A JP 1922386A JP 1922386 A JP1922386 A JP 1922386A JP H0572254 B2 JPH0572254 B2 JP H0572254B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- heat
- roll
- shrinkable tube
- take
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は熱収縮性チユーブを製造する方法に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a heat-shrinkable tube.
（従来技術）
熱収縮性チユーブは合成樹脂からなる素材チユ
ーブを延伸温度に加熱してから径方向に延伸する
ことにより得られる。(Prior Art) A heat-shrinkable tube is obtained by heating a material tube made of synthetic resin to a stretching temperature and then stretching it in the radial direction.
従来、径方向にのみ収縮性を有するチユーブを
得るためにはａ）素材チユーブを器具により機械
的に拡開する、ｂ）所定の径の布管等の中で所定
長さずつ、内部流体圧により延伸する、ｃ）連続
的に内部流体圧により延伸する。（特開昭56−
53042号）等の方法があつた。 Conventionally, in order to obtain a tube that is contractible only in the radial direction, a) the material tube is mechanically expanded using an instrument, and b) the internal fluid pressure is c) Continuously drawn by internal fluid pressure. (Unexamined Japanese Patent Publication 1983-
53042).
（発明が解決しようとする問題点）
しかし、上記ａ）、ｂ）の方法はいずれもバツ
チ式の製造方法なので極めて生産効率が悪く、ま
たｃ）の方法は連続的に搬送する際の張力により
軸方向に幾分か延伸され、軸方向の収縮率がどう
しても残り易いという問題があつた。(Problems to be Solved by the Invention) However, the above methods a) and b) are both batch-type manufacturing methods, so production efficiency is extremely low, and method c) is due to tension during continuous conveyance. There was a problem that it was stretched to some extent in the axial direction and the shrinkage rate in the axial direction tended to remain.
（問題点を解決するための手段）
本発明は、延伸温度に加熱するための工程に着
目して前記問題点を解決せんとしたもので、その
特徴は、
(1) 加熱ゾーン内に設置したキヤリアベルト上に
素材チユーブを載せて引き取りロールまで搬送
し、該引き取りロール以降で延伸することを特
徴とする熱収縮性チユーブの製造方法。および
(2) 加熱ゾーンにおいて、水蒸気により素材チユ
ーブを加熱することを特徴とする特許請求の範
囲第１項記載の熱収縮性チユーブの製造方法で
ある。(Means for Solving the Problems) The present invention aims to solve the above problems by focusing on the process of heating to the drawing temperature. A method for producing a heat-shrinkable tube, which comprises placing a material tube on a carrier belt, transporting it to a take-up roll, and stretching after the take-up roll. and (2) the method for producing a heat-shrinkable tube according to claim 1, characterized in that the material tube is heated with water vapor in the heating zone.
以下、図面に基づき説明する。 The following will explain based on the drawings.
第１図は本発明の熱収縮性チユーブの製造方法
を実施するための装置の一例を示す一部切り欠い
た正面図である。 FIG. 1 is a partially cutaway front view showing an example of an apparatus for carrying out the method of manufacturing a heat-shrinkable tube of the present invention.
第１図において１は素材チユーブ、１２は延伸
後の熱収縮性チユーブであり、２は加熱ゾーン、
３はキヤリアベルト、４は引き取りロールであ
り、５は外径規制装置、６はニツプロールであ
る。 In FIG. 1, 1 is a material tube, 12 is a heat-shrinkable tube after stretching, 2 is a heating zone,
3 is a carrier belt, 4 is a take-up roll, 5 is an outer diameter regulating device, and 6 is a nip roll.
素材チユーブ１を連続的に搬送しながら延伸温
度に加熱する際に素材チユーブの自重や装置各部
との接触に生ずる長さ方向の伸びが、キヤリアベ
ルト３の上に載せながら搬送することにより防止
できる。そして、引き取りロール４で一旦ニツプ
してから延伸することにより軸方向の伸びが極め
て小さい状態で半径方向に延伸することができ
る。この半径方向への延伸は例えば引き取りロー
ル４を通過した直後、冷却された外径規制装置５
中に導入するとともに、後のニツプロール６との
あいだのチユーブ内に閉じ込められた圧力空気に
よる内圧で連続的に所定の径まで径方向に延伸で
きる。 When the material tube 1 is continuously conveyed and heated to the stretching temperature, elongation in the length direction that occurs due to the weight of the material tube or contact with various parts of the device can be prevented by conveying it while being placed on the carrier belt 3. . Then, by once nipping it with the take-up rolls 4 and then stretching it, it is possible to stretch it in the radial direction with very little elongation in the axial direction. This stretching in the radial direction is carried out, for example, immediately after passing through the take-up roll 4, by the cooled outer diameter regulating device 5.
It can be continuously stretched in the radial direction to a predetermined diameter by the internal pressure caused by the pressurized air trapped in the tube between the tube and the subsequent nip roll 6.
本発明においては加熱ゾーン２での加熱手段と
して水蒸気を用いた場合は熱風や輻射による加熱
よりも熱効率がよく、しかも温水による加熱のよ
うに浮力による素材チユーブ１の浮き上りを防ぐ
ための繁雑な装置も必要としないので最も好適で
ある。 In the present invention, when steam is used as a heating means in the heating zone 2, the thermal efficiency is better than heating by hot air or radiation, and unlike heating by hot water, it is difficult to prevent the material tube 1 from rising due to buoyancy. This is the most suitable method because it does not require any equipment.
（実施例）
酢酸ビニル15重量％のエチレン−酢酸ビニル共
重合体にジクミルパーオキサイドとビニルトリエ
トキシシランを配合してシリコングラフト化エチ
レン−酢酸ビニル共重合体を製造し、これを環状
ダイから押し出し成形してさらに90℃、40％RH
で５日間架橋処理してゲル分率70％、内径0.5mm、
厚さ0.45mmの素材チユーブを得た。(Example) A silicone-grafted ethylene-vinyl acetate copolymer was produced by blending dicumyl peroxide and vinyltriethoxysilane with an ethylene-vinyl acetate copolymer containing 15% by weight of vinyl acetate, and the silicone-grafted ethylene-vinyl acetate copolymer was produced using a circular die. Extruded and further heated to 90℃, 40%RH
After cross-linking for 5 days, the gel fraction was 70%, the inner diameter was 0.5 mm,
A material tube with a thickness of 0.45 mm was obtained.
この素材チユーブを第１図に示す装置で、水蒸
気により98℃±１℃に加熱された長さ1mの加熱
ゾーン２に導入して13m／分で進行するキヤリア
ベルト３上に載せて引き取りロール４によりキヤ
リアベルトと等速で引き取り、内径2.5mmの外径
規制装置５に導きニツプロールまでのチユーブ内
を1.0Kg／cm2の圧力空気を満たすことにより径方
向に延伸して外径2.5mm、厚さ0.19mmの熱収縮性
チユーブ１２を得た。この熱収縮性チユーブ１２
を長さ100mmに切断し、98℃のグリセリンに１分
間浸漬した後、軸方向の寸法ｐ（mm）および外径
ｄ（mm）を測定し下記式により軸方向および径方
向の収縮率（％）を算出した結果を第１表に示
す。 This material tube is introduced into a heating zone 2 with a length of 1 m heated to 98°C ± 1°C by water vapor using the device shown in Fig. 1, placed on a carrier belt 3 moving at a speed of 13 m/min, and then placed on a take-up roll 4. The tube is taken up at the same speed as the carrier belt, guided to the outer diameter regulating device 5 with an inner diameter of 2.5 mm, and the inside of the tube up to the nip roll is filled with pressurized air of 1.0 Kg/cm 2 to stretch it in the radial direction to form a tube with an outer diameter of 2.5 mm and a thickness. A heat-shrinkable tube 12 with a length of 0.19 mm was obtained. This heat-shrinkable tube 12
After cutting it into a length of 100 mm and immersing it in glycerin at 98℃ for 1 minute, measure the axial dimension p (mm) and outer diameter d (mm), and calculate the axial and radial shrinkage rate (%) using the following formula. ) are shown in Table 1.
軸方向収縮率（Sp）＝100−ｐ／100×100
径方向収縮率（Sd）＝2.5−ｄ／2.5×100
（比較例）
前記実施例と同様の素材チユーブ１をキヤリア
ベルト３を用いず、引き取りロール４と等速の送
りロール（図示せず）で加熱ゾーン２に送り込ん
で実施例と同様にして得られた熱収縮性チユーブ
１２につき実施例と同様にして軸方向、径方向の
収縮率を測定した結果を第１表に示す。Axial contraction rate (Sp) = 100-p/100×100 Radial contraction rate (Sd) = 2.5-d/2.5×100 (Comparative example) The same material tube 1 as in the above example was used without using the carrier belt 3. The heat-shrinkable tube 12, which was obtained in the same manner as in the example by feeding it into the heating zone 2 with a feed roll (not shown) at the same speed as the take-up roll 4, was shrunk in the axial and radial directions in the same manner as in the example. The results of measuring the ratio are shown in Table 1.
第１表
Sp（％） Sd（％）
実施例 ８ 50
比較例 15 50
径方向収縮率（Sd）は実施例、比較例とも50
％と変らないが、軸方向の収縮率（Sp）は実施
例が８％と比較例の15％に比べて小さくなつてい
る。 Table 1 Sp (%) Sd (%) Example 8 50 Comparative example 15 50 The radial shrinkage rate (Sd) is 50 for both the example and comparative example.
%, but the axial shrinkage rate (Sp) is 8% in the example, which is smaller than 15% in the comparative example.
（発明の効果）
以上、説明した如く本発明の熱収縮性チユーブ
の製造方法によれば加熱工程の素材チユーブの伸
びを防止したので軸方向の収縮率の小さい熱収縮
性チユーブを製造することができ、また連続延伸
により効率的な生産が可能となる。さらに、加熱
ゾーンにおいて水蒸気による加熱を行なえば熱効
率が良好になるとともに加熱装置が複雑化しない
などの利点を有する。(Effects of the Invention) As explained above, according to the method for manufacturing a heat-shrinkable tube of the present invention, elongation of the material tube during the heating process is prevented, so a heat-shrinkable tube with a small shrinkage rate in the axial direction can be manufactured. Continuous stretching enables efficient production. Furthermore, heating with steam in the heating zone has advantages such as good thermal efficiency and not complicating the heating device.
第１図は本発明の熱収縮性チユーブの製造方法
を実施するための装置の一例を示す一部切り欠い
た正面図である。
１……素材チユーブ、１２……熱収縮性チユー
ブ、２……加熱ゾーン、３……キヤリアベルト、
４……引き取りロール。
FIG. 1 is a partially cutaway front view showing an example of an apparatus for carrying out the method of manufacturing a heat-shrinkable tube of the present invention. 1...Material tube, 12...Heat shrinkable tube, 2...Heating zone, 3...Carrier belt,
4...Takeover roll.
Claims (1)
素材チユーブを載せて引き取りロールまで搬送
し、該引き取りロール以降で延伸することを特徴
とする熱収縮性チユーブの製造方法。 ２ 加熱ゾーンにおいて、水蒸気により素材チユ
ーブを加熱することを特徴とする特許請求の範囲
第１項記載の熱収縮性チユーブの製造方法。[Scope of Claims] 1. A method for producing a heat-shrinkable tube, which comprises placing a material tube on a carrier belt installed in a heating zone, transporting it to a take-up roll, and stretching the material after the take-up roll. 2. The method for manufacturing a heat-shrinkable tube according to claim 1, wherein the material tube is heated with water vapor in the heating zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1922386A JPS62176825A (en) | 1986-01-31 | 1986-01-31 | Preparation of heat-shrinkable tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1922386A JPS62176825A (en) | 1986-01-31 | 1986-01-31 | Preparation of heat-shrinkable tubing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62176825A JPS62176825A (en) | 1987-08-03 |
| JPH0572254B2 true JPH0572254B2 (en) | 1993-10-08 |
Family
ID=11993368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1922386A Granted JPS62176825A (en) | 1986-01-31 | 1986-01-31 | Preparation of heat-shrinkable tubing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62176825A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100706487B1 (en) | 2006-02-10 | 2007-04-10 | 엘에스전선 주식회사 | Delivering apparatus for preventing heat shrinkable tube from elongating |
-
1986
- 1986-01-31 JP JP1922386A patent/JPS62176825A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62176825A (en) | 1987-08-03 |
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