JPS63146910A - Heat-shrinkable tube - Google Patents
Heat-shrinkable tubeInfo
- Publication number
- JPS63146910A JPS63146910A JP29424786A JP29424786A JPS63146910A JP S63146910 A JPS63146910 A JP S63146910A JP 29424786 A JP29424786 A JP 29424786A JP 29424786 A JP29424786 A JP 29424786A JP S63146910 A JPS63146910 A JP S63146910A
- Authority
- JP
- Japan
- Prior art keywords
- main component
- plasticizer
- resin
- tube
- ethylene
- 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
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000005977 Ethylene Substances 0.000 claims abstract description 14
- 239000004014 plasticizer Substances 0.000 claims abstract description 13
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 12
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920001038 ethylene copolymer Polymers 0.000 claims abstract description 9
- KRGNPJFAKZHQPS-UHFFFAOYSA-N chloroethene;ethene Chemical group C=C.ClC=C KRGNPJFAKZHQPS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011342 resin composition Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 229920006026 co-polymeric resin Polymers 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 abstract description 9
- 238000006116 polymerization reaction Methods 0.000 abstract description 8
- 238000001125 extrusion Methods 0.000 abstract description 4
- 229940049920 malate Drugs 0.000 abstract description 2
- 239000003549 soybean oil Substances 0.000 abstract description 2
- 235000012424 soybean oil Nutrition 0.000 abstract description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 abstract 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 abstract 1
- -1 tin malate ester Chemical class 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- MGFRKBRDZIMZGO-UHFFFAOYSA-N barium cadmium Chemical compound [Cd].[Ba] MGFRKBRDZIMZGO-UHFFFAOYSA-N 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- RAHHITDKGXOSCO-UHFFFAOYSA-N ethene;hydrochloride Chemical group Cl.C=C RAHHITDKGXOSCO-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N malic acid Chemical compound OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はポリ塩化ビニル系の合成樹脂からなる熱収縮デ
ユープに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat-shrinkable dupe made of polyvinyl chloride-based synthetic resin.
（従来の技術）
従来より、たとえばコンデンサ等の電気部品の絶縁、定
格表示を目的として、あるいは瓶のキャップシールとし
てポリ塩化ビニル系の合成樹脂からなる熱収縮チューブ
を加熱収縮させて被覆することが行なわれている。(Prior Art) Conventionally, heat-shrinkable tubes made of polyvinyl chloride-based synthetic resin have been used to cover electrical components such as capacitors by heating and shrinking them, for example, for the purpose of insulating electrical components, indicating ratings, or as cap seals for bottles. It is being done.
（発明が解決しに一うとする問題点）
そして被覆された電気部品の場合は、熱処即されて熱収
縮チューブの残留歪を緩和してからプリント基板にマウ
ントされ、ハンダイ４けされ、有機溶剤により洗浄され
乾燥されるという苛酷なＴ稈を通過覆る。またキャップ
シール等の場合も充填物に含まれる有機溶剤がキャップ
シールに句着するＪ９合がある。(Problem that the invention seeks to solve) In the case of coated electrical parts, they are heat-treated to relieve the residual strain in the heat-shrinkable tube, then mounted on a printed circuit board, soldered four times, and then It passes through the T culm, which is harsh and is washed with a solvent and dried. Furthermore, in the case of cap seals, etc., there is a case where the organic solvent contained in the filler stains the cap seal.
このように有機溶剤に接触した後に、上記従来のポリ塩
化ビニル系の合成樹脂からなる熱収縮チューブに亀裂が
生じたり、再収縮を起こずという問題があつに。After coming into contact with an organic solvent, the conventional heat-shrinkable tube made of polyvinyl chloride-based synthetic resin suffers from cracking and failure to re-shrink.
（問題点を解決するための手段）
本発明省らは上記問題の原因を追及した結果、従来の熱
収縮チューブは、加熱収縮後も幾分の歪が残留しており
、洗浄工程等で有機溶剤により侵され、続いて乾燥工程
等においで前ＷＪ残留歪がｆ１用して亀″Ｉｌ１等をイ
１することがあきらがと４１っｌ、二。(Means for solving the problem) As a result of investigating the cause of the above problem, the Ministry of the Invention and others found that conventional heat-shrinkable tubes retain some distortion even after heat-shrinking, and that After being eroded by a solvent, the residual strain of the previous WJ during the subsequent drying process, etc., can be used as f1 to cause damage to the surface of the WJ.
さらに、熱収縮チー］−ブを構成覆るポリ塩化じニル樹
脂組成物に含まれる可塑剤が有機溶剤により抽出され、
置換づる作用により有機溶剤による膨潤が起こる点を見
い出した。Furthermore, the plasticizer contained in the polychloride resin composition that constitutes and covers the heat-shrinkable cheese is extracted with an organic solvent,
We discovered that swelling caused by organic solvents occurs due to the effect of substitution.
以上の知見から本発明に到達したものであり、その要旨
は塩化ビニル−エチレン共重合体樹脂または該共重合体
樹脂とポリ塩化ビニル樹脂との混合物を主成分とし、主
成分中のエチレン含有量が２〜６重量％であり、前記主
成分１００重半部用対し可塑剤含有量が２重量部以下で
ある樹脂組成物からなる熱収縮チコーブである。The present invention was arrived at from the above findings, and its gist is that the main component is a vinyl chloride-ethylene copolymer resin or a mixture of the copolymer resin and a polyvinyl chloride resin, and the ethylene content in the main component is is 2 to 6% by weight, and the plasticizer content is 2 parts by weight or less based on 100 and a half parts by weight of the main component.
本発明で塩化ビニル−エチレン共重合体は１１１独で主
成分として用いる場合にはエチレン含量が２−６重用％
のものが必要とされる。また、ポリ塩化ビニル樹脂と聞
合する場合でもエチレン含量が２〜１０重量％のものが
人手容易なので好ましい。In the present invention, when the vinyl chloride-ethylene copolymer is used as the main component in 111, the ethylene content is 2-6%.
are required. Further, even when combined with polyvinyl chloride resin, one having an ethylene content of 2 to 10% by weight is preferable because it is easy to handle.
そして、平均重合度としては８００〜１２００稈麻が実
用的である。A practical average degree of polymerization is 800 to 1,200.
また、主成分としては、塩化ビニルーニ「ヂレン共重合
体にポリ塩化ビニル樹脂を、エチレン含量が主成分全体
として２〜６重量％となるＪ−うに混合して４つよい。Further, as the main component, four types may be used, including a vinyl chloride/dylene copolymer mixed with a polyvinyl chloride resin and a J-uni whose ethylene content is 2 to 6% by weight as a whole of the main component.
ポリ塩化ビニル樹脂どしては、平均重合ｍが８００〜１
２００程度の、可塑剤を含有しないものが好ましく使用
できる。。For polyvinyl chloride resin, the average polymerization m is 800 to 1.
200, which does not contain a plasticizer, can be preferably used. .
エチレン含量が主成分全体で２重用％未満であると、樹
脂組成１り１の流動ｆ１が悪化し、押出成形効宰がイ仄
下する。また、６重量％を越えると、延伸を均一に行イ
蒙−）ξとが困ｔＩ＋どなり、安定して熱収縮チコーブ
をｊｑられイｒい。If the ethylene content is less than 2% for the entire main component, the flow f1 of the resin composition will deteriorate and the extrusion molding effect will deteriorate. Moreover, if it exceeds 6% by weight, it will be difficult to uniformly stretch the film, making it difficult to stably heat-shrink it.
樹脂組成物中の７ｉＪ塑剤含右量は２重量部以下として
、′ＰＩｊ’ｌｌによるｄ換膨潤を防ぐ必要があるが、
まったく含まないのがＧｉ’ ｌ、しい。ｎ１塑剤どし
ては、ジオクヂルフタレ−１−、ジブチルフタレー１へ
、ジー４り−ｆ−ルｊ′ジペー１〜、トリメリット酸１
〜リオクｆル、１−リフ］ニルフＡスフフ・イト、ジシ
クロへキシルノクレ−１−”ｎ′の一般的り、、可塑剤
の伯、可塑剤含有量を右づる錫マレート」−ステル、バ
ナジウム−非鉛系、カドミウム−バリウム系■の複合安
定剤あるいＣ：＃ ｌｒｌボキシ化した大豆油、アマニ
油等の液状成分り含む。The content of 7iJ plasticizer in the resin composition must be 2 parts by weight or less to prevent d conversion swelling due to 'PIj'll.
Gi'l doesn't contain it at all. The n1 plasticizers include diolylphthale-1-, dibutyl-phthalate-1, di-4-ly-f-le-j'-p-1~, and trimellitic acid-1.
〜Riokufl, 1-rif] Nilf A suffuit, dicyclohexylnochlore-1-"n' general rule, plasticizer count, tin malate that determines the plasticizer content" - Stell, vanadium - Contains lead-free, cadmium-barium compound compound stabilizer or C:#lrl liquid components such as boxylated soybean oil and linseed oil.
木５し明の熱収縮ブー１−ブを製）告するｌこめには−
に記樹脂組成物を環状タイから溶融押し出して原チュー
ブを形成し、この原チューブを２組のニップロールの間
でチコーブ内部に加圧気体を閉込めることにより膨張延
伸覆る従来の製法によればよい。延伸温度としては９０
〜１２０℃が好ましい。I'm going to make a heat-shrinkable boob made of 5-thick wood.
A conventional manufacturing method may be used in which the resin composition described in 2 is melted and extruded from an annular tie to form a raw tube, and this raw tube is expanded and stretched by trapping pressurized gas inside the chicobe between two sets of nip rolls. . The stretching temperature is 90
~120°C is preferred.
（実施例）
第１表に示り−ように２〜７重量％のエチレン含有量の
塩化ビニル−エチレン共重合体（いずれも平均重合度が
１０５０）単体（実験ＮＯ１２〜４．６）、ポリ塩化ビ
ニル樹脂（平均重合度が約１０５０）単体（実験Ｎｏ、
１．７．８）およびエチレン含有間が８重印％の塩化ビ
ニル−エチレン共重合体（平均重合度１０５０）と前記
ポリ塩化ビニルとの混合物（実験Ｎｏ、５＞からなり全
体としてのエチレン含有量が０〜７％の主成分にジＡク
チルフタレートＯ〜１０重量部、安定剤（２塩基性亜ｇ
４Ｍ鉛）２重用部、顔料２重量部を配合してなる樹脂組
成物を直径２０１１１ｍの環状ダイから２００Ｃで溶融
押し出して原チコーブを％！Ｉ造し、これを９５℃まで
加熱して外径３２１まで膨張延伸して、肉圧０．１ｍｍ
、１００℃で５分間力１熱したときの収縮率が横方向４
５％、縦方向７％の収縮チコーブを１−１ｋ。(Example) As shown in Table 1, vinyl chloride-ethylene copolymer with an ethylene content of 2 to 7% by weight (both have an average degree of polymerization of 1050) alone (experiment Nos. 12 to 4.6), Vinyl chloride resin (average degree of polymerization is about 1050) alone (experiment No.
1.7.8) and a mixture of a vinyl chloride-ethylene copolymer (average degree of polymerization 1050) with an ethylene content of 8% (average degree of polymerization 1050) and the polyvinyl chloride (experiment No. 5), and the total ethylene content is 0 to 7% of the main component, diActyl phthalate O to 10 parts by weight, stabilizer (dibasic subg
A resin composition containing 2 parts by weight of 4M lead) and 2 parts by weight of pigment is melted and extruded at 200C through an annular die with a diameter of 20111 m to reduce the original Chicove to %! This was heated to 95°C, expanded and stretched to an outer diameter of 321 mm, and the wall thickness was 0.1 mm.
, the shrinkage rate in the transverse direction when heated at 100℃ for 5 minutes with a force of 1
5%, longitudinally 7% shrinkage chicove 1-1k.
つさ゛に、４ｆｊられたチコーブを長さ６２ ｍｍに切
断して、こｒしを直径３Ｑｍｍ、高さ５０ｍｍの電解］
ンデンリーに１重合（）、１８０℃の熱＋４１１−ンネ
ル中で２０秒加熱して収縮被覆した１、この被覆後のコ
ンアン１ノーを第１表に示１各秤溶剤に各時間、浸漬さ
せてから２４時間自然乾燥さ１！た。前記各条件３０個
ずつの］ンデンリ−につき外観を観察し、浸漬面と変化
の無いものを○、コンデンサ端面周囲に被覆されたチー
Ｊ−ブ端が幾分短くなったものを△、ヂコーブ端がコン
デンサ胴部まで収縮したものをＸであられして評価を行
なった。Cut a 4-fj thick piece of wood into a length of 62 mm and roll it into a piece with a diameter of 3 Q mm and a height of 50 mm]
1 Polymerized (), heated at 180°C for 20 seconds in a 411-degree tunnel to shrink coat 1. After this coating, the 1 and 1 layers are shown in Table 1. 1 Each scale was immersed in a solvent for each time Air dry for 24 hours from 1! Ta. Observe the external appearance of each of the 30 capacitors under each of the above conditions, ○ indicates that there is no change from the immersed surface, △ indicates that the chip edge coated around the end face of the capacitor is somewhat shortened, and △ indicates that there is no change from the immersed surface. When the capacitor had shrunk to the body, it was evaluated by abrading it with X.
前記収縮チューブについてそれぞれ３５℃のオーブン中
で２週間放置した場合の横方向の収縮率（フィルム低１
ｆｌｌマ縮性）を測定し第１表に示した。The shrinkage rate in the transverse direction (film low 1
full shrinkability) was measured and shown in Table 1.
−〇−
第１表／）ｓ ＋ら明らかなように、主成分中のエチレ
ン含有量が２−６小量％の実験ＮＯ１２〜５は溶剤中で
も膨ｄ％′１か起き刀“乾燥後の再収縮も生じない等耐
溶剤性−に侵れているとともに、低温収縮性１：）ｏ。-〇- As is clear from Table 1/)s +, experiments Nos. 12 to 5, in which the ethylene content in the main component was 2-6%, swelled by d%'1 even in the solvent. It has excellent solvent resistance, such as no re-shrinkage, and low-temperature shrinkage of 1:)o.
３５％と小ざい。こねに対してエチレン含有量がＯのス
トレートポリ
Ｊルフタレ−［〜）を５、１０Φｎ１部含有でる実験Ｎ
ｏ．１．８は、耐溶剤性に劣っており、低温収縮性も０
．８以上と大きい。また、同じくストレー１−ポリ塩化
ビニルを用い、可塑剤を含有しない実験ＮＯ．７は耐溶
剤性は優れているが、流動特性か悪いため押し出し生産
性が極度に落ちた。It's small at 35%. Experiment N in which 5, 10Φn 1 part of straight poly J Lufthale [~] with an ethylene content of 0 was added to the dough
o. 1.8 has poor solvent resistance and low-temperature shrinkage of 0.
．． Larger than 8. In addition, Experiment No. 1 using Stray 1-polyvinyl chloride and containing no plasticizer was also used. Although No. 7 had excellent solvent resistance, extrusion productivity was extremely low due to poor flow characteristics.
そして、エヂ１ノン含￥串が７弔ｆｉｔ％と大きい、ポ
リ塩化ヒニルーエチレン共重合体を用いる実験Ｎｏ．６
ｉま、押し出しは良好にてさ・るが、延伸時に、破断が
生じ、生産できイｆかった。Experiment No. 1 uses a polyhinyl chloride-ethylene copolymer with a high content of 7%. 6
Although extrusion was good, breakage occurred during stretching and production was not possible.
そして、実験ＮＯ．１〜３について収縮特性を測定した
結果を第１図に示す。第１図は横軸に加熱温度、ｌｉＭ
軸に５）分間加熱した場合の収縮率（％）をとったもの
である。第１図から明ｌうかなように曲線１、２、１１
、２１で示ず本発明の実験ＮＯ。And experiment no. The results of measuring the shrinkage characteristics of Samples 1 to 3 are shown in FIG. In Figure 1, the horizontal axis represents the heating temperature, liM
The shrinkage rate (%) is calculated when the shaft is heated for 5 minutes. As is clear from Figure 1, curves 1, 2, and 11
, No. 21 of the present invention.
２、３のヂ１−ブは従来の実験Ｎｏ．１（曲線３、３１
）のものに比べて６０’Ｃ付近の縦、横収縮率が小さく
なっているため低温収縮性が小さい。Dimensions 2 and 3 are based on conventional experiment No. 1 (curve 3, 31
) The longitudinal and transverse shrinkage rates around 60'C are smaller than those of 1.), so the low-temperature shrinkability is small.
（発明の効果）
以上のように本発明の熱収縮ヂコーブは塩化ビニル−エ
チレン共重合体樹脂または該共重合体樹脂とポリ塩化ビ
ニル樹脂との混合物を主成分とし、主成分中のエチレン
含有量が２〜６１Ｎｉｔ％であり、前記主成分１００重
量部に対し可塑剤含有量が２ｍｍ部以下である樹脂組成
物からなるので、忍耐溶剤性に優れ、しかも押し出し性
、延伸性が良好であり、低温収縮性か小さいという優れ
たものである。(Effects of the Invention) As described above, the heat-shrinkable dicove of the present invention has a vinyl chloride-ethylene copolymer resin or a mixture of the copolymer resin and a polyvinyl chloride resin as its main component, and the ethylene content in the main component is is 2 to 61 Nit%, and the plasticizer content is 2 mm parts or less per 100 parts by weight of the main component, so it has excellent solvent tolerance and good extrudability and stretchability. It has excellent low-temperature shrinkage.
第１図は本発明の熱収縮チコーブの収縮特性を示すグラ
フである。
１・・・・・・実験ＮＯ．２の縦方向収縮特性１１・・
・・・・実験ＮＯ．２の横方向収縮特性−〇−FIG. 1 is a graph showing the shrinkage characteristics of the heat-shrinkable Chicove of the present invention. 1...Experiment No. Longitudinal shrinkage characteristics of 2 11...
...Experiment No. Transverse shrinkage characteristics of 2 -〇-
Claims (1)
樹脂とポリ塩化ビニル樹脂との混合物を主成分とし、主
成分中のエチレン含有量が２〜６重量％であり、前記主
成分１００重量部に対し可塑剤含有量が２重量部以下で
ある樹脂組成物からなる熱収縮チューブ。The main component is a vinyl chloride-ethylene copolymer resin or a mixture of the copolymer resin and a polyvinyl chloride resin, the ethylene content in the main component is 2 to 6% by weight, and 100 parts by weight of the main component is On the other hand, a heat-shrinkable tube made of a resin composition having a plasticizer content of 2 parts by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29424786A JPS63146910A (en) | 1986-12-10 | 1986-12-10 | Heat-shrinkable tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29424786A JPS63146910A (en) | 1986-12-10 | 1986-12-10 | Heat-shrinkable tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63146910A true JPS63146910A (en) | 1988-06-18 |
Family
ID=17805255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29424786A Pending JPS63146910A (en) | 1986-12-10 | 1986-12-10 | Heat-shrinkable tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63146910A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5090732A (en) * | 1973-12-18 | 1975-07-21 | ||
| JPS5229849A (en) * | 1975-09-01 | 1977-03-07 | Japan Synthetic Rubber Co Ltd | Thermoplastic resin composition |
| JPS537755A (en) * | 1976-07-09 | 1978-01-24 | Nissan Chem Ind Ltd | Vinyl chloride resin composition |
| JPS57189359A (en) * | 1981-05-15 | 1982-11-20 | Matsushita Electric Ind Co Ltd | Conductive disc type recording carrier |
-
1986
- 1986-12-10 JP JP29424786A patent/JPS63146910A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5090732A (en) * | 1973-12-18 | 1975-07-21 | ||
| JPS5229849A (en) * | 1975-09-01 | 1977-03-07 | Japan Synthetic Rubber Co Ltd | Thermoplastic resin composition |
| JPS537755A (en) * | 1976-07-09 | 1978-01-24 | Nissan Chem Ind Ltd | Vinyl chloride resin composition |
| JPS57189359A (en) * | 1981-05-15 | 1982-11-20 | Matsushita Electric Ind Co Ltd | Conductive disc type recording carrier |
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