JPS63210150A - Coating polymer composition - Google Patents
Coating polymer compositionInfo
- Publication number
- JPS63210150A JPS63210150A JP4359487A JP4359487A JPS63210150A JP S63210150 A JPS63210150 A JP S63210150A JP 4359487 A JP4359487 A JP 4359487A JP 4359487 A JP4359487 A JP 4359487A JP S63210150 A JPS63210150 A JP S63210150A
- Authority
- JP
- Japan
- Prior art keywords
- density
- low
- composition
- density polyethylene
- polyethylene
- 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
- 239000000203 mixture Substances 0.000 title abstract description 14
- 229920001688 coating polymer Polymers 0.000 title 1
- 229920001684 low density polyethylene Polymers 0.000 claims description 14
- 239000004702 low-density polyethylene Substances 0.000 claims description 14
- 239000011342 resin composition Substances 0.000 claims description 10
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000654 additive Substances 0.000 abstract description 2
- 239000003086 colorant Substances 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract description 2
- 239000003063 flame retardant Substances 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 abstract description 2
- 239000003381 stabilizer Substances 0.000 abstract description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract 1
- 239000004614 Process Aid Substances 0.000 abstract 1
- 239000003963 antioxidant agent Substances 0.000 abstract 1
- 230000003078 antioxidant effect Effects 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 abstract 1
- 239000004698 Polyethylene Substances 0.000 description 9
- -1 polyethylene Polymers 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- 238000004132 cross linking Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000008199 coating composition Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 240000005572 Syzygium cordatum Species 0.000 description 3
- 235000006650 Syzygium cordatum Nutrition 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000004708 Very-low-density polyethylene Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920001866 very low density polyethylene Polymers 0.000 description 1
Landscapes
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は被覆用樹脂組成物に関し、更に詳しくは電線や
電カケープルの被覆用組成物として極めて好適な樹脂組
成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coating resin composition, and more particularly to a resin composition that is extremely suitable as a coating composition for electric wires and electric cables.
電線や電カケープルの絶縁被覆用組成物とじて各種の樹
脂組成物が使用されておりそのうちの一つとしてポリエ
チレンを使用した組成物がある。Various resin compositions are used as insulation coating compositions for electric wires and cables, one of which is a composition using polyethylene.
そしてこの際のポリエチレンとしては、密度の低い所謂
低密度ポリエチレンと称されるものから密度の高い所謂
高密度ポリエチレンと称される各種のポリエチレンが適
宜に使用されている。As the polyethylene in this case, various types of polyethylene are used as appropriate, ranging from low-density so-called low-density polyethylene to high-density so-called high-density polyethylene.
而してこのポリエチレン組成物を用いた電線やケーブル
に於いては、これ等の端末部に於いてポリエチレン組成
物から成る被覆絶縁層が収縮しく所謂シュリンクバック
と称される）、この収縮が端末部の破壊原因の大きな要
因となっている。In electric wires and cables using this polyethylene composition, the insulating coating layer made of the polyethylene composition shrinks at the end of these wires (this is called shrinkback), and this shrinkage occurs at the end of the wire or cable. This is a major factor in the destruction of parts.
またこの種電線やケーブルに於いては、端末部や破壊部
分からの水の侵入に基づく所謂水トリーと称される難点
も生ずることが多い。In addition, this type of electric wire or cable often suffers from the problem of so-called water treeing, which is caused by water intrusion from terminal parts or broken parts.
本発明が解決しようとする問題点は、従来の電線やケー
ブルに於ける上記端末部のシュリンクバックに基づく難
点並びに上記水トリーに基づく難点を解消することであ
り、更に詳しくは、電線やケーブルの端末部に於ける絶
縁体層の収縮を大幅に減少すると共に、水のケーブル内
への侵入を防止して、上記難点を解消し得る樹脂組成物
を開発することである。The problem to be solved by the present invention is to solve the problems of conventional electric wires and cables due to the shrink-back of the terminal parts and the problems due to the water tree. The object of the present invention is to develop a resin composition that can significantly reduce the shrinkage of the insulating layer at the terminal end and prevent water from entering the cable, thereby solving the above-mentioned problems.
この問題点は、超低密度ポリエチレン単独、またはこれ
と低密度ポリエチレンとを含有する樹脂組成物を被覆用
組成物として使用することによって達成される。即ち本
発明は超低密度ポリエチレン、またはこれと低密ポリエ
チレンとを含有して成る被覆用樹脂組成物に係るもので
ある。This problem can be solved by using ultra-low-density polyethylene alone or a resin composition containing ultra-low-density polyethylene and low-density polyethylene as a coating composition. That is, the present invention relates to ultra-low-density polyethylene or a coating resin composition comprising ultra-low-density polyethylene and low-density polyethylene.
本発明の組成物は、超低密度ポリエチレン゛（以下Ｖ−
ＬＤＰＲという）単独、またはこれと低密度ポリエチレ
ン（以下ＬＤＰＥという）とを含有して成るものであり
、またこれ等の少なくとも１種を架橋せしめた組成物を
も包含する。The composition of the present invention is made of very low density polyethylene (hereinafter referred to as V-
LDPR) alone or containing LDPR and low density polyethylene (hereinafter referred to as LDPE), and also includes compositions in which at least one of these is crosslinked.
本発明に於いて使用するＶ−ＬＤＰＥは従来この種電線
やケーブルの絶縁被覆用組成物として全く使用されたこ
との無いものであり、その特徴とする所は従来の低密度
ポリエチレンに比し、更に一段と密度が低いところにあ
る。The V-LDPE used in the present invention has never been previously used as an insulation coating composition for electric wires and cables, and its characteristics are as follows compared to conventional low-density polyethylene: Furthermore, the density is even lower.
本発明に於いて使用するＶ−ＬＤＰＲはその密度が０．
９１０ ｇ／ｃａ以下であり、好ましくは０、 ９０
０〜０． ９０６ ｇ／ｃｌである。従来のＬＤＰＲの
密度は０．９１２〜０．９３ｇ／ｃ＋ｆｌ程度であり、
この点に於いて明確に区別される。このにうな極めて低
い密度を有するポリエチレンであれば、本発明に於いて
使用することが出来、たとえば直鎖状ポリエチレンでも
良いし、分岐状ポリエチレンでも使用出来るが、直鎖状
ポリエチレンが好ましい。The V-LDPR used in the present invention has a density of 0.
910 g/ca or less, preferably 0.90 g/ca or less
0~0. 906 g/cl. The density of conventional LDPR is about 0.912 to 0.93 g/c+fl,
There is a clear distinction in this respect. Any polyethylene having such a very low density can be used in the present invention; for example, linear polyethylene or branched polyethylene can be used, but linear polyethylene is preferred.
本発明で使用するＶ−ＬＤＰＲは通常メルトインデック
ス（ＭＩという）は、０．２〜１０．０種度であり、ま
た弾性率に於いてもＬＤＰＲに比し同等以上である。こ
のようなＶ−ＬＤＰＲをこれ等単独で、またはＬＤＰＥ
と併用するときは電線や電カケープルのシュリンクバッ
クを未然に防止できると共に水トリーの難点も大きく向
上することが出来る。The V-LDPR used in the present invention usually has a melt index (MI) of 0.2 to 10.0, and a modulus of elasticity that is equal to or higher than that of LDPR. Such V-LDPR can be used alone or with LDPE.
When used in conjunction with a water tree, it is possible to prevent the shrink-back of electric wires and electric cables, and to greatly improve the problems of water trees.
本発明に於いてＶ−ＬＤＰＥと必要に応じ併用されるＬ
ＤＰＥはその密度０．９１２〜０．９３０ｇ／ｃ／程度
のものであり、その使用割合はＶ−ＬＤＰＲ１００重量
部に対し、ＬＤＰＥ２〜１００重量部、好ましくは５〜
５０重量部程度である。In the present invention, L used in combination with V-LDPE as necessary
DPE has a density of about 0.912 to 0.930 g/c/, and the usage ratio is 2 to 100 parts by weight, preferably 5 to 100 parts by weight of LDPE per 100 parts by weight of V-LDPR.
The amount is about 50 parts by weight.
この際ＬＤＰＲの使用割合が多くなりすぎると所期の効
果が充分に期待出来ない。このＬＤＰＲとしては直鎖状
及び分岐状のものがいずれも使用出来るが、直鎖状のも
のが特に好ましい。これ等ＬＤＰＲとしては通常そのＭ
Ｉは０．３〜５．０種度のものが使用される。At this time, if the proportion of LDPR used is too high, the desired effect cannot be fully expected. Both linear and branched LDPRs can be used, but linear ones are particularly preferred. As for these LDPRs, the M
I used has a degree of 0.3 to 5.0.
本発明の組成物には必要に応じ、この種樹脂組成物に従
来から使用されて来た各種の添加剤を配合することが出
来、たとえば、老化防止側、難燃剤、充填剤、着色剤、
電圧安定剤、滑剤、加工助剤、紫外線吸収剤等を例示す
ることが出来る。The composition of the present invention may contain various additives conventionally used in resin compositions of this type, for example, anti-aging agents, flame retardants, fillers, colorants,
Examples include voltage stabilizers, lubricants, processing aids, and ultraviolet absorbers.
また本発明の組成物には、上記Ｖ−ＬＤＰＥ及びＬＤＰ
Ｒの少なくとも１種を架橋したものも包含される。この
際の架橋手段は従来から用いられて来た各種の架橋手段
、たとえば化学架橋剤を用いた加熱架橋法、電子線照射
架橋法、水架橋法等が適宜に採用される。Further, the composition of the present invention includes the above-mentioned V-LDPE and LDP.
Those in which at least one type of R is crosslinked are also included. As the crosslinking means in this case, various conventionally used crosslinking means, such as a heating crosslinking method using a chemical crosslinking agent, an electron beam irradiation crosslinking method, a water crosslinking method, etc., are appropriately employed.
本発明に於いては、Ｖ−ＬＤＰＥを使用するので電線や
ケーブルの端末部に於ける収縮を大幅に減少出来、ひい
ては端末接続部の信頼性を大きく向上せしめることが出
来る。In the present invention, since V-LDPE is used, shrinkage at the terminal portion of the electric wire or cable can be significantly reduced, and the reliability of the terminal connection portion can be greatly improved.
また本発明組成物を用いて被覆した電線やケーブルは耐
水トリー性も大きく向上するという優れた効果がある。Further, electric wires and cables coated with the composition of the present invention have the excellent effect of greatly improving water resistance.
以下に実施例と比較例とを示して本発明の特徴とする所
をより明確とする。Examples and comparative examples are shown below to clarify the features of the present invention.
実施例 １
ケーブルに於けるシュリンクバック現象は、製造工程゛
に於ける加熱冷却条件が表面層と内部で異なることによ
って生じる内部残留応力に起因する。Example 1 The shrink-back phenomenon in cables is caused by internal residual stress caused by differences in heating and cooling conditions between the surface layer and the inside during the manufacturing process.
またこの残留応力は、膨張（収縮）率の大きいものほど
大きく、その点に於いて熱膨張率の小さいものほどシュ
リンクバック現象が小さくなると考えられる。Further, this residual stress increases as the coefficient of expansion (contraction) increases, and in this respect, it is thought that the shrink-back phenomenon decreases as the coefficient of thermal expansion decreases.
Ｖ−ＬＤＰＲ（密度０． ９０６ ｇ／ｃ１．、ＭＩ０
．８）を用いて半径約０．５６ｃｍ、長さｌ ｃｍ、体
積１ ｃ＋ｆｌの円柱状の成形体を作製し、その一方の
端面を固定し、長さ方向の熱膨張収縮率を測定した。結
果は３．３％であった。V-LDPR (density 0.906 g/c1., MI0
．． 8) was used to prepare a cylindrical molded body with a radius of about 0.56 cm, a length of 1 cm, and a volume of 1 c+fl, one end surface of which was fixed, and the coefficient of thermal expansion and contraction in the length direction was measured. The result was 3.3%.
このＶ−ＬＤＰＥを下記第１表に示す配合組成で組成物
を調整し、これを用いて常法によって被覆電線となした
。このものの端部の収縮特性を測定した。この結果は後
記第２表の通りであった。A composition of this V-LDPE was prepared according to the composition shown in Table 1 below, and a coated electric wire was prepared using the composition in a conventional manner. The shrinkage characteristics of the ends of this material were measured. The results were as shown in Table 2 below.
第１表
〈電線の製造方法〉
通常の乾式架橋法を用いて絶縁厚２４龍、導体２０００
ｍ２のケーブルを製造した。Table 1〈Electric wire manufacturing method〉 Insulation thickness 24mm, conductor 200mm using normal dry crosslinking method
A cable of m2 was manufactured.
く熱膨張率の測定方法〉
熱膨張率の測定は室温〜２００度での熱変形率をＴＭＡ
（Ｔｈｅｒｍａｌ Ｍｅｃｈａｎｉｃａｌ Ａｎａｌ
ｙｚｅｒ）を用いて測定した。Measuring method of thermal expansion coefficient> Thermal expansion coefficient is measured by TMA, which is the thermal deformation coefficient between room temperature and 200 degrees.
(Thermal Mechanical Anal
yzer).
く電線のシュリンクバックの測定〉
ケーブル２ｍを切断し、１週間室温放置後、被覆絶縁層
が収縮した長さを測定し、初期長（２ｍ）に対する割合
をもって収縮率とした。Measurement of Shrinkback of Electrical Wire> A 2m cable was cut, and after being left at room temperature for one week, the length of the shrinkage of the insulating coating layer was measured, and the ratio to the initial length (2m) was defined as the shrinkage rate.
第２表Table 2
Claims (3)
エチレンとを含有して成る被覆用樹脂組成物。(1) A coating resin composition comprising ultra-low density polyethylene or ultra-low density polyethylene.
．９１０ｇ／ｃｍ＾３である特許請求の範囲第１項に記
載の被覆用樹脂組成物。(2) Ultra-low density polyethylene has a density of 0.900 to 0
．． The coating resin composition according to claim 1, which has a coating weight of 910 g/cm^3.
エチレンが架橋されたものである特許請求の範囲第１項
に記載の被覆用樹脂組成物。(3) The coating resin composition according to claim 1, which is ultra-low density polyethylene or (and) crosslinked low density polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62043594A JPH0819289B2 (en) | 1987-02-25 | 1987-02-25 | Resin composition for power cable coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62043594A JPH0819289B2 (en) | 1987-02-25 | 1987-02-25 | Resin composition for power cable coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63210150A true JPS63210150A (en) | 1988-08-31 |
| JPH0819289B2 JPH0819289B2 (en) | 1996-02-28 |
Family
ID=12668124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62043594A Expired - Fee Related JPH0819289B2 (en) | 1987-02-25 | 1987-02-25 | Resin composition for power cable coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0819289B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198643A (en) * | 1987-10-13 | 1989-04-17 | Fujikura Ltd | Polyethylene composition |
| JPH0268810A (en) * | 1988-09-02 | 1990-03-08 | Fujikura Ltd | Power cable |
| JPH04296342A (en) * | 1991-03-27 | 1992-10-20 | Dainippon Ink & Chem Inc | Polyethylene resin composition and extrusion coating material |
| WO1994006858A1 (en) * | 1992-09-15 | 1994-03-31 | The Dow Chemical Company | FORMULATED ETHYLENE/α-OLEFIN ELASTOMERIC COMPOUNDS |
| US5861463A (en) * | 1996-10-31 | 1999-01-19 | The Dow Chemical Company | Impact-modified thermoplastic polyolefins and articles fabricated therefrom |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59215342A (en) * | 1983-05-24 | 1984-12-05 | Nippon Petrochem Co Ltd | Resin composition for power cable |
-
1987
- 1987-02-25 JP JP62043594A patent/JPH0819289B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59215342A (en) * | 1983-05-24 | 1984-12-05 | Nippon Petrochem Co Ltd | Resin composition for power cable |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198643A (en) * | 1987-10-13 | 1989-04-17 | Fujikura Ltd | Polyethylene composition |
| JPH0268810A (en) * | 1988-09-02 | 1990-03-08 | Fujikura Ltd | Power cable |
| JPH04296342A (en) * | 1991-03-27 | 1992-10-20 | Dainippon Ink & Chem Inc | Polyethylene resin composition and extrusion coating material |
| WO1994006858A1 (en) * | 1992-09-15 | 1994-03-31 | The Dow Chemical Company | FORMULATED ETHYLENE/α-OLEFIN ELASTOMERIC COMPOUNDS |
| US5861463A (en) * | 1996-10-31 | 1999-01-19 | The Dow Chemical Company | Impact-modified thermoplastic polyolefins and articles fabricated therefrom |
| US6140420A (en) * | 1996-10-31 | 2000-10-31 | The Dow Chemical Company | Impact-modified thermoplastic polyolefins and articles fabricated therefrom |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0819289B2 (en) | 1996-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |