JPH02279754A - Flexible vinyl chloride resin composition - Google Patents
Flexible vinyl chloride resin compositionInfo
- Publication number
- JPH02279754A JPH02279754A JP10115489A JP10115489A JPH02279754A JP H02279754 A JPH02279754 A JP H02279754A JP 10115489 A JP10115489 A JP 10115489A JP 10115489 A JP10115489 A JP 10115489A JP H02279754 A JPH02279754 A JP H02279754A
- Authority
- JP
- Japan
- Prior art keywords
- shrinkage
- vinyl chloride
- molding
- annealing
- chloride resin
- 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
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000011342 resin composition Substances 0.000 title description 14
- 239000000945 filler Substances 0.000 claims abstract description 15
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 13
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- 239000004014 plasticizer Substances 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 abstract description 37
- 238000000137 annealing Methods 0.000 abstract description 26
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 abstract description 3
- 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 description 3
- 239000000378 calcium silicate Substances 0.000 abstract description 3
- 229910052918 calcium silicate Inorganic materials 0.000 abstract description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000454 talc Substances 0.000 abstract description 3
- 229910052623 talc Inorganic materials 0.000 abstract description 3
- 241000276425 Xiphophorus maculatus Species 0.000 abstract 2
- 238000013329 compounding Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 239000010985 leather Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 235000012222 talc Nutrition 0.000 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 description 1
- IUVCFHHAEHNCFT-INIZCTEOSA-N 2-[(1s)-1-[4-amino-3-(3-fluoro-4-propan-2-yloxyphenyl)pyrazolo[3,4-d]pyrimidin-1-yl]ethyl]-6-fluoro-3-(3-fluorophenyl)chromen-4-one Chemical compound C1=C(F)C(OC(C)C)=CC=C1C(C1=C(N)N=CN=C11)=NN1[C@@H](C)C1=C(C=2C=C(F)C=CC=2)C(=O)C2=CC(F)=CC=C2O1 IUVCFHHAEHNCFT-INIZCTEOSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- -1 and after annealing Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (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、射出成形品等の成形後収縮率を小さくするこ
とができる。軟質塩化ビニル樹脂組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention can reduce the post-molding shrinkage rate of injection molded products and the like. The present invention relates to a soft vinyl chloride resin composition.
軟質塩化ビニル樹脂は、一般に難燃性、柔軟性。 Soft PVC resin is generally flame retardant and flexible.
耐候性等に優れているため、サイドモール、レザー、電
線被覆材等の各種の用途に用いられている。Because of its excellent weather resistance, it is used in various applications such as side moldings, leather, and wire covering materials.
しかしながら、上記従来の軟質塩化ビニル樹脂組成物に
は１次の問題点がある。However, the above-mentioned conventional soft vinyl chloride resin compositions have a primary problem.
即ち、軟質塩化ビニル樹脂は、射出成形時における成形
収縮が他の樹脂に比較して大きい、これは軟質塩化ビニ
ル樹脂組成物に可塑剤が含有されているためと考えられ
る。That is, soft vinyl chloride resin has a larger molding shrinkage during injection molding than other resins, and this is thought to be because the soft vinyl chloride resin composition contains a plasticizer.
即ち、上記成形収縮は、従来５例えば成形型寸法に対し
てｌ０ＸＩＯ−３〜５０Ｘ１０−’とかなり大きい。That is, the above-mentioned molding shrinkage is quite large, for example, 10XIO-3 to 50X10-' compared to the conventional mold dimensions.
そこで、かかる軟質塩化ビニル樹脂を用いて射出成形品
等を製造するに際して、射出成形時における成形収縮を
見込んで５成形型を作製することが考えられる。しかし
、その後における製品の収縮（以下、これを便宜上、成
形後収縮という）等の問題を解決することが困難である
。Therefore, when producing injection molded products using such a soft vinyl chloride resin, it is conceivable to prepare five molds in consideration of mold shrinkage during injection molding. However, it is difficult to solve problems such as subsequent shrinkage of the product (hereinafter referred to as post-molding shrinkage for convenience).
例えば、上記サイドモールを例にとって説明すると２次
の通りである。For example, taking the above-mentioned side molding as an example, the explanation is as follows.
即ち、自動車の外装用のサイドモールは２通常帯状のも
のであり、その長さは例えば１ｍ位のものが多い、かか
る長尺の成形品は、一般に射出成形品として製造されて
いる。しかして、該サイドモールの成形後収縮が１例え
ば０．３％であると。That is, side moldings for the exterior of automobiles are usually band-shaped, and their length is often about 1 m, for example. Such long molded products are generally manufactured as injection molded products. However, the shrinkage of the side molding after molding is 1, for example, 0.3%.
長さが１ｍのモールにおいては、その成形後には約３ｍ
ｍの収縮が生ずる。For a molding with a length of 1m, the length after molding is approximately 3m.
A contraction of m occurs.
そして、上記サイドモールを自動車に取り付けた場合に
おいては、前記のごと（収縮が３ｍｍも生じていると取
付部との整合性が不充分となる。When the side molding is attached to an automobile, as mentioned above (if the shrinkage is as much as 3 mm, the alignment with the mounting part will be insufficient).
一方、上記サイドモールを接着する前に、予め７０〜８
０℃で数時間加熱処理してアニール処理を施すことが行
われている。かかるアニール処理は、主として射出成形
時等に生じたサイドモール内の歪みを除去するために行
われるものである。On the other hand, before gluing the side moldings above, prepare a
Annealing treatment is performed by heating at 0° C. for several hours. This annealing treatment is performed primarily to remove distortions within the side moldings that occur during injection molding or the like.
そして、更に上記アニール処理時においても。Furthermore, even during the above-mentioned annealing process.
上記サイドモールには一定の収縮が生ずる。この収縮を
便宜上、アニール収縮という、そのため。A certain amount of shrinkage occurs in the side molding. For convenience, this shrinkage is called annealing shrinkage.
軟質塩化ビニル樹脂からなるサイドモールには更にアニ
ール収縮が加算されることになり、アニール後には製品
のバラツキが益々大きくなる。Further annealing shrinkage is added to the side molding made of soft vinyl chloride resin, and after annealing, product variations become even greater.
これらの問題点は、上記レザー、電線被覆材等の長尺成
形品においても同様のことが言える。These problems also apply to long molded products such as the above-mentioned leather and wire covering materials.
本発明は、かかる従来の問題点に鑵みてなされたもので
、上記成形後収縮及びアニール後収縮（成形後収縮とア
ニール収縮とを合算したもの）を小さくすることができ
る。軟質塩化ビニル樹脂組成物を提供しようとするもの
である。The present invention has been made in consideration of such conventional problems, and can reduce the post-molding shrinkage and post-annealing shrinkage (the sum of post-molding shrinkage and annealing shrinkage). The present invention aims to provide a soft vinyl chloride resin composition.
本発明は、平均重合度が４５０〜７００の塩化ビニル重
合体１００重量部と、針状又は板状フィラー１０〜１０
０重量部と、可塑剤１０〜８０重量部とからなることを
特徴とする軟質塩化ビニル樹脂組成物にある。The present invention uses 100 parts by weight of a vinyl chloride polymer having an average degree of polymerization of 450 to 700, and 10 to 10 parts by weight of an acicular or plate-like filler.
0 parts by weight, and 10 to 80 parts by weight of a plasticizer.
本発明において、上記針状フィラーとしては。In the present invention, the acicular filler includes:
例えばケイ酸カルシウム、塩基性硫酸マグネシウム等の
針状結晶物（アスペクト比が１０以上）がある、また、
上記板状フィラーとしては、タルクマイカ（雲母）等が
ある。また、上記可塑剤としては、ジオクチルフタレー
） （ＤＯＰ）、 ジブチルフタレー） （ＤＢＰ）
等がある。For example, there are acicular crystals (with an aspect ratio of 10 or more) such as calcium silicate and basic magnesium sulfate, and
Examples of the above-mentioned plate-like filler include talcum mica (mica) and the like. In addition, the above plasticizers include dioctyl phthalate (DOP) and dibutyl phthalate (DBP).
etc.
また、上記塩化ビニル重合体の平均重合度が４５０未満
の場合には、成形品の機械的強度、耐候（光）性等が低
下する。また、平均重合度が７０Ｏを超えると成形品の
上記成形後収縮及びアニール後収縮が大きくなる。Furthermore, if the average degree of polymerization of the vinyl chloride polymer is less than 450, the mechanical strength, weather resistance (light) resistance, etc. of the molded article will decrease. Moreover, when the average degree of polymerization exceeds 70O, the above-mentioned post-molding shrinkage and post-annealing shrinkage of the molded article become large.
また、上記フィラーが１０重量部未満の場合には、上記
成形後収縮及びアニール後収縮が大きくなる。また、１
００重量部を超えると、引張り強度及び伸び等の物性が
低下することになる。Moreover, when the amount of the filler is less than 10 parts by weight, the shrinkage after molding and the shrinkage after annealing become large. Also, 1
If it exceeds 0.00 parts by weight, physical properties such as tensile strength and elongation will deteriorate.
また、上記可塑剤が８０重量部を超えると、成形品の上
記成形後収縮及びアニール収縮が大きくなる。また、１
０重量部未満では軟質の塩化ビニル樹脂組成物となり得
ない。Furthermore, if the amount of the plasticizer exceeds 80 parts by weight, the post-molding shrinkage and annealing shrinkage of the molded product will increase. Also, 1
If the amount is less than 0 parts by weight, a soft vinyl chloride resin composition cannot be obtained.
本発明にかかる軟質塩化ビニル樹脂組成物においては、
塩化ビニル重合体の平均重合度が４５０〜７００として
いるため、射出成形品等の成形後収縮及びアニール後収
縮が、２後述のごと（従来品の約２分の１〜３分の１と
小さくなる。このように、成形後収縮及びアニール後収
縮が小さくなる理由は１次のように考えられる。In the soft vinyl chloride resin composition according to the present invention,
Since the average degree of polymerization of the vinyl chloride polymer is 450 to 700, the shrinkage after molding and after annealing of injection molded products is as small as 1/2 to 1/3 of conventional products, as described in 2 below. The reason why the shrinkage after molding and the shrinkage after annealing are reduced is considered to be as follows.
即ち、平均重合度を上記のごとく一定の範囲に限定する
ことにより、射出成形時等において線状の高分子構造物
の絡みが、この範囲以上の平均重合度のものより少なく
なり、ひいては成形後収縮。In other words, by limiting the average degree of polymerization to a certain range as described above, the entanglement of linear polymer structures during injection molding, etc., becomes less than when the average degree of polymerization exceeds this range, and as a result, after molding, contraction.
アニール後収縮の原因となる内部歪みが小さくなると考
えられる。It is thought that the internal strain that causes shrinkage after annealing is reduced.
また２本軟質塩化ビニル樹脂組成物においては上記針状
又は板状フィラーが１０−１００重量部含存含有ている
ため、これらのフィラーが射出成形品等の内部において
、成形後収縮、アニール後収縮等を抑制するものと考え
られる。また、これらのフィラーは、一種の繊維のごと
き役割（作用）を果たすものと考えられる。In addition, since the two-ply soft vinyl chloride resin composition contains 10 to 100 parts by weight of the needle-like or plate-like filler, these fillers cause shrinkage after molding and shrinkage after annealing inside the injection molded product. It is thought that this suppresses the Further, these fillers are considered to play a role (action) like a type of fiber.
また９本軟質塩化ビニル樹脂組成物においては。In addition, in the case of 9 soft vinyl chloride resin compositions.
上記可塑剤を１０〜８０重量部の範囲に限定しているた
め、可塑剤の含有による成形後収縮、アニール後収縮が
抑制されるものと考えられる。Since the plasticizer is limited to a range of 10 to 80 parts by weight, it is thought that shrinkage after molding and shrinkage after annealing due to the inclusion of the plasticizer is suppressed.
しかして１本発明の後述する効果は、上記の作用の相乗
効果によって得られるものと考えられる。Therefore, it is thought that the effects of the present invention, which will be described later, are obtained by a synergistic effect of the above-mentioned actions.
したがって９本発明の軟質塩化ビニル樹脂組成物は、特
に小さい寸法変化率が要求されるサイドモール、レザー
、電線被覆材等の長尺成形品に使用することが好適であ
る。Therefore, the soft vinyl chloride resin composition of the present invention is suitable for use in long molded products such as side moldings, leather, and wire covering materials, which require a particularly small dimensional change rate.
以上のごとく１本発明によれば、射出成形品等の成形後
収縮率、アニール後収縮率を従来品の約半分以下に小さ
くすることができる。軟質塩化ビニル樹脂組成物を提供
することができる。As described above, according to the present invention, the post-molding shrinkage rate and post-annealing shrinkage rate of injection molded products etc. can be reduced to about half or less of those of conventional products. A soft vinyl chloride resin composition can be provided.
以下１本発明にかかる実施例、及び比較例につき説明す
る。An example according to the present invention and a comparative example will be explained below.
上記成形後収縮率及びアニール後収縮率は、圧縮成形に
よるテストピース（１５０Ｘ１５０Ｘ２ｍｍ）の成形後
と、アニール処理（８０℃で５時間放置）後とにおいて
、それぞれ成形時の成形型の寸法との差異を測定して算
出した。The above shrinkage rate after molding and shrinkage rate after annealing are the differences between the dimensions of the mold at the time of molding, after molding a test piece (150 x 150 x 2 mm) by compression molding, and after annealing treatment (left at 80°C for 5 hours). It was calculated by measuring.
また、各偶における成分の配合割合（重量部）。Also, the blending ratio (parts by weight) of the ingredients in each case.
上記成形後収縮率及びアニール後収■率の測定結果は各
表に示した。The measurement results of the shrinkage rate after molding and the yield rate after annealing are shown in each table.
まず、実施例１は、塩化ビニル重合体の平均重合度が下
限に相当するものを使用し、また実施例２は、平均重合
度が略中間部分のものを使用した。First, in Example 1, a vinyl chloride polymer whose average degree of polymerization corresponded to the lower limit was used, and in Example 2, a vinyl chloride polymer whose average degree of polymerization was approximately in the middle was used.
そして、実施例３〜１１は、いずれも平均重合度が上限
に相当するものを使用した。In Examples 3 to 11, materials whose average degree of polymerization corresponded to the upper limit were used.
また、フィラーに関しては、実施例１〜７及び１０にお
いては、針状フィラーであるケイ酸カルシウムの針状結
晶（アスペクト比が２０）のものを使用し、また実施例
８，９．１１においては。Regarding the filler, in Examples 1 to 7 and 10, acicular filler of calcium silicate needle crystals (with an aspect ratio of 20) was used, and in Examples 8, 9.11, .
板状フィラーであるタルクを使用した。Talc, which is a plate-shaped filler, was used.
一方、比較例においては、塩化ビニル重合体の平均重合
度が１４５０のものを比較例Ａ２で使用した以外は、全
て平均重合度が７００のものを使用した。On the other hand, in Comparative Examples, vinyl chloride polymers having an average degree of polymerization of 700 were used in all cases, except for Comparative Example A2, in which vinyl chloride polymer had an average degree of polymerization of 1450.
また、フィラーに関しては、比較例Ａ１は添加なし、Ａ
２は針状フィラーを、その他はいずれも重質炭酸カルシ
ウムを使用した。Regarding the filler, Comparative Example A1 has no addition, A
No. 2 used acicular filler, and all others used heavy calcium carbonate.
次に２上記各軟質塩化ビニル梼脂組成物を用いて圧縮成
形によるテストピースを作製し、成形後収縮及びアニー
ル後収縮について測定した。その結果を第３表及び第４
表に示す。Next, test pieces were prepared by compression molding using each of the above-mentioned soft vinyl chloride resin compositions, and shrinkage after molding and shrinkage after annealing were measured. The results are shown in Tables 3 and 4.
Shown in the table.
第３表及び第４表より知られるごとく、実施例１〜１１
は、成形後収縮率がいずれも４．０ＸＩＯ弓以下と小さ
く、従来品（比較別品）の約半分以下となっている。な
お、比較例Ａ２は３×ｌＯ−コと小さいが、アニール後
収縮率が高い。As known from Tables 3 and 4, Examples 1 to 11
The post-molding shrinkage rates of these products are all below 4.0XIO bow, which is about half that of the conventional product (comparison product). Note that although Comparative Example A2 has a small shrinkage rate of 3×1O−, the shrinkage rate after annealing is high.
また、アニール後収縮に関しては、実施例１゜４．５．
１０．１１は、５．０ＸＩＯ−’以下と小さく、またそ
の他の実施例においては、６．０〜８．０ＸＩＯ弓とな
っている。Regarding the shrinkage after annealing, Example 1゜4.5.
10.11 is as small as 5.0XIO-' or less, and in other embodiments it is 6.0 to 8.0XIO.
これに対し、比較例Ａｌ−Ａ３は、いずれもＩＱＸＩＯ
−”以上と大きく、この点に関しても本発明の実施例品
はいずれも従来品（比較別品）に比してアニール後収縮
が小さくなっていることが知られる。On the other hand, in Comparative Example Al-A3, both IQXIO
In this respect, it is known that all of the example products of the present invention have smaller post-annealing shrinkage than the conventional products (comparative products).
以上により５本発明によれば、成形後収縮率及びアニー
ル後収縮率が小さい軟質塩化ビニル樹脂組成物が得られ
ることが分る。From the above, it can be seen that according to the present invention, a soft vinyl chloride resin composition having a small shrinkage rate after molding and a small shrinkage rate after annealing can be obtained.
また２本発明の軟質塩化ビニル樹脂組成物は。Further, the soft vinyl chloride resin composition of the present invention is as follows.
例えば上記サイドモール、レザー、電線被覆材等の比較
的長尺物の射出成形品等に好適である。For example, it is suitable for injection molded products of relatively long lengths such as the above-mentioned side moldings, leather, and wire covering materials.
Claims (1)
重量部と、針状又は板状フィラー１０〜１００重量部と
、可塑剤１０〜８０重量部とからなることを特徴とする
軟質塩化ビニル樹脂組成物。Vinyl chloride polymer 100 with an average degree of polymerization of 450 to 700
10 to 100 parts by weight of an acicular or plate-like filler, and 10 to 80 parts by weight of a plasticizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1101154A JP2706972B2 (en) | 1989-04-20 | 1989-04-20 | Soft vinyl chloride resin long molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1101154A JP2706972B2 (en) | 1989-04-20 | 1989-04-20 | Soft vinyl chloride resin long molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02279754A true JPH02279754A (en) | 1990-11-15 |
| JP2706972B2 JP2706972B2 (en) | 1998-01-28 |
Family
ID=14293132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1101154A Expired - Lifetime JP2706972B2 (en) | 1989-04-20 | 1989-04-20 | Soft vinyl chloride resin long molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2706972B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04178449A (en) * | 1990-11-13 | 1992-06-25 | Riken Viny Kogyo Kk | Vinyl chloride-based resin composition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61162530A (en) * | 1985-01-09 | 1986-07-23 | Sunstar Giken Kk | Vibration damper |
-
1989
- 1989-04-20 JP JP1101154A patent/JP2706972B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61162530A (en) * | 1985-01-09 | 1986-07-23 | Sunstar Giken Kk | Vibration damper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04178449A (en) * | 1990-11-13 | 1992-06-25 | Riken Viny Kogyo Kk | Vinyl chloride-based resin composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2706972B2 (en) | 1998-01-28 |
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