JPH0621204B2 - Resin composition with improved printability - Google Patents
Resin composition with improved printabilityInfo
- Publication number
- JPH0621204B2 JPH0621204B2 JP2234198A JP23419890A JPH0621204B2 JP H0621204 B2 JPH0621204 B2 JP H0621204B2 JP 2234198 A JP2234198 A JP 2234198A JP 23419890 A JP23419890 A JP 23419890A JP H0621204 B2 JPH0621204 B2 JP H0621204B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- weight
- density polyethylene
- ethylene
- parts
- 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
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- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は、印刷性の改善されたポリプロピレン樹脂組成
物又は高密度ポリエチレン樹脂組成物もしくはそれらの
ブレンド物にエチレン−α−オレフイン共重合樹脂を一
定の割合でブレンドしこの樹脂組成物、さらに、モノグ
リセリン樹脂酸エステル系電防止剤を一定の割合で一種
類あるいは数種類のブレンド物として添加してなる樹脂
組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a polypropylene resin composition having improved printability, a high-density polyethylene resin composition, or a blend thereof with an ethylene-α-olefin copolymer resin. The present invention relates to a resin composition prepared by blending in a fixed ratio, and further, a resin composition prepared by adding a monoglycerin resin acid ester antistatic agent as a blend of one kind or several kinds in a fixed ratio.
(従来の技術及びその課題) 従来、結晶性ポリプロピレン樹脂、又は高密度ポリエチ
レン樹脂、もしくはそれらのブレンド物は、安価で成型
しやすく、機械的特性に優れていることから種々の用途
に幅広く利用されている。(Prior Art and Its Problems) Conventionally, crystalline polypropylene resin, high-density polyethylene resin, or a blend thereof is inexpensive, easy to mold, and has excellent mechanical properties, and thus has been widely used in various applications. ing.
しかしながら、印刷等の二次加工を施すためには、結晶
性ポリプロピレン樹脂、高密度ポリエチレン樹脂、また
はそれらのブレンド物の成型品の表面に種々の表面処理
を施し(インキ等に対する親和性を高める必要があり、
種々の方法で表面の活性化が行なわれている)例えばコ
ロナ放電処理があるが使用されるインキ等も限定される
という欠点がある。特にオフセット印刷に使用される紫
外線硬化型インキに関しては、表面活性の特続性強度か
らコロナ処理のみで、インキとの密着性をもたせる事は
不十分であり、一般的に下塗用樹脂プライマーが塗られ
ている。However, in order to perform secondary processing such as printing, various surface treatments must be applied to the surface of the molded product of crystalline polypropylene resin, high-density polyethylene resin, or blends thereof (it is necessary to increase the affinity for ink etc. There is
Although the surface is activated by various methods) For example, there is a corona discharge treatment, but there is a drawback that the ink or the like used is also limited. Especially for UV-curable inks used for offset printing, it is not sufficient to provide adhesion with the ink only by corona treatment due to the surface activity persistence strength. Has been.
塗布方式としては、シルクスクリーン方式、グラビア方
式が一般的であるが、プライマーが高価である点、工程
が増える等の欠点があり、コストのアップ、生産管理、
品質管理での問題がある。As a coating method, a silk screen method and a gravure method are generally used, but there are drawbacks such as an expensive primer and an increase in the number of steps.
There is a quality control problem.
それら問題を解決するために一定の割合で極性基を有す
るエチレン系コーポリマーまたはターポリマーを添加す
る事によりインキの密着性を改善する方法があるが、成
型品の経時変化により表面の活性が低下しインキとの密
着性が低下するという問題がある。In order to solve these problems, there is a method to improve the adhesion of ink by adding ethylene-based copolymer or terpolymer having a polar group in a fixed ratio, but the surface activity decreases due to the aging of the molded product. There is a problem that the adhesion with the ink is reduced.
したがって本発明は、下塗用プライマーを塗る事なく、
紫外線硬化型インキで印刷出来、経時変化によるインキ
との密着性の低下する事のない表面の改質されたポリプ
ロピレン樹脂、又は高密度ポリエチレン樹脂もしくはそ
れらのブレンド物の成形品を得る事にある。Therefore, the present invention, without applying a primer for primer,
Another object of the present invention is to obtain a molded product of a polypropylene resin having a surface modified, a high-density polyethylene resin, or a blend thereof, which can be printed with an ultraviolet curable ink and whose adhesion to the ink does not deteriorate due to aging.
(課題を解決するための手段) 本発明者らは、上記従来技術の欠点を克服し、インキの
塗膜密着性の優れた成形品を開発すべく鋭意研究を重え
た結果ポリプロピレン樹脂、または高密度ポリエチレン
樹脂、もしくはそれらのブレンド物にエチレン−α−オ
レフイン共重合樹脂を添加する事により、さらに詳しく
は、これらの組成物をT型ダイスを付した押出機にて溶
融押出して得られるフイルム又はシートに表面活性化処
理を施すことで、成形品に対してインキの密着性が改善
されるという事実を見い出し、本発明を完成するに至っ
たのである。(Means for Solving the Problems) The inventors of the present invention have conducted intensive studies to develop a molded article having excellent ink film coating adhesion, overcoming the drawbacks of the above-mentioned conventional techniques, and as a result, polypropylene resin or high By adding an ethylene-α-olefin copolymer resin to a density polyethylene resin or a blend thereof, more specifically, a film obtained by melt-extruding these compositions with an extruder equipped with a T-type die or The fact that the adhesion of the ink to the molded product is improved by subjecting the sheet to the surface activation treatment was found, and the present invention was completed.
すなわち、本発明は、ポリプロピレン樹脂又は高密度ポ
リエチレン樹脂もしくはそれらのブレンド物100重量部
に対し、エチレン−α−オレフィン共重合体樹脂を1〜
50重量部添加してなる樹脂組成物さらには特定の静電防
止剤を0.01〜2.0重量部添加してなる樹脂組成物を提供
するもので、さらに詳細にはフィルム又はシートに成形
された時、フイルム又はシートに印刷性を賦与する事の
出来るインキとの密着性の改良されたポリプロピレン、
高密度ポリエチレンまたはそれらのブレンド物に関する
ものである。That is, the present invention, based on 100 parts by weight of polypropylene resin or high-density polyethylene resin or a blend thereof, ethylene-α-olefin copolymer resin 1 ~
A resin composition further comprising 50 parts by weight of a specific antistatic agent is provided to provide a resin composition comprising 0.01 to 2.0 parts by weight, more specifically, when formed into a film or sheet, Polypropylene with improved adhesion to ink that can impart printability to the film or sheet,
It relates to high density polyethylene or blends thereof.
(実施例) ここに言うポリプロピレン樹脂とは、プロピレン単独の
ホモポリマー、プロピレンとエチレンとの共重合体であ
るランダムコポリマー、及びエチレンプロピレンラバー
を含むエチレンとの共重合体であるブロックコポリマー
を言う。(Example) The polypropylene resin referred to herein means a homopolymer of propylene alone, a random copolymer which is a copolymer of propylene and ethylene, and a block copolymer which is a copolymer of ethylene including ethylene propylene rubber.
高密度ポリエチレン樹脂とは、金属酸化物、アルキルア
ルミニウムなどを触媒として常圧または加圧下で重合し
て得られるポリエチレンで、密度0.940以上のものであ
る。The high-density polyethylene resin is a polyethylene obtained by polymerization under normal pressure or pressure with a metal oxide, an alkylaluminum or the like as a catalyst, and has a density of 0.940 or more.
これらポリプロピレン樹脂と高密度ポリエチレン樹脂ブ
レンド物とは、ポリプロピレン樹脂100重量部に対し
て、高密度ポリエチレン樹脂1〜50重量部添加したも
の、もしくは高密度ポリエチレン樹脂100重量部に対し
てポリプロピレン樹脂1〜50重量部添加したものであ
る。These polypropylene resins and high-density polyethylene resin blends include 100 parts by weight of polypropylene resin, 1 to 50 parts by weight of high-density polyethylene resin, or 100 parts by weight of high-density polyethylene resin. 50 parts by weight are added.
またエチレン−α−オレフィン共重合樹脂とは、高圧イ
オン重合法によるエチレンとα−オレフィンを共重合し
て得られる密度0.910以下の直鎖状分子構造のポリエチ
レンである。この共重合樹脂としては密度0.91〜0.925
の範囲であるが、直鎖状分子構造のポリエチレンもある
が、ポリプロピレン樹脂又は高密度ポリエチレン樹脂と
の混合物に添加し、シートとして加工した時に分散に問
題がある。The ethylene-α-olefin copolymer resin is a polyethylene having a linear molecular structure with a density of 0.910 or less, which is obtained by copolymerizing ethylene and α-olefin by a high pressure ionic polymerization method. This copolymer resin has a density of 0.91 to 0.925.
Although there is polyethylene having a linear molecular structure, there is a problem in dispersion when added to a mixture with a polypropylene resin or a high-density polyethylene resin and processed into a sheet.
添加量に関しては、これらのコーポリマーを1重量部添
加する事で効果が見られ、好ましくは30〜10重量部添
加することである。50重量部を超える添加ではシートの
著しい剛性の低下が見られ、また、1重量部未満の添加
では効果がみられない。Regarding the amount of addition, the effect can be seen by adding 1 part by weight of these copolymers, and it is preferable to add 30 to 10 parts by weight. When the amount added exceeds 50 parts by weight, the rigidity of the sheet is remarkably lowered, and when the amount added is less than 1 part by weight, no effect is observed.
さらに静電防止剤については、一次加工、二次加工にお
ける静電気の発生による吸引反発による工程障害,吸ジ
ンによる障害等を防ぐためのものである。本発明に用い
られる静電防止剤は、ポリプロピレン樹脂、高密度ポリ
エチレン樹脂、またはそのブレンド物にエチレン−α−
オレフイン共重合樹脂を添加した配合物において、経時
による成形品のインキの密着を維持するためにきわめて
有効に作用するもので、モノグリセリンエステル系静電
防止剤で下記の一般式で表わされる。アルキル基の炭素
数はC10〜C20のものが効果がある。Further, the antistatic agent is for preventing a process failure due to repulsion by suction due to the generation of static electricity in the primary processing and the secondary processing, and a failure due to suction. The antistatic agent used in the present invention is a polypropylene resin, a high-density polyethylene resin, or a blend thereof with ethylene-α-
It is a monoglycerin ester-based antistatic agent represented by the following general formula, which acts very effectively to maintain the adhesion of the ink of the molded product with the passage of time in the compound containing the olefin copolymer resin. The number of carbon atoms in the alkyl group may have the effect that the C 10 -C 20.
添加量に関しては0.01〜2.0重量部添加する事で静電防
止効果が見られ、2.0重量部を越える添加量ではインキ
の密着力の低下が見られる。 Regarding the amount of addition, 0.01 to 2.0 parts by weight shows an antistatic effect, and if the amount of addition exceeds 2.0 parts by weight, the ink adhesion is lowered.
かくして、これらの組成物をT型ダイスを付した押出機
にて溶融押出して得られたシートは、表面にエチレン−
α−オレフイン共重合体樹脂が適当に散在し、さらに表
面に活性化処理を施す事で、より均一な活性の強い表面
を得る事ができる。Thus, the sheet obtained by melt-extruding these compositions with an extruder equipped with a T-type die has ethylene-
By uniformly scattering the α-olefin copolymer resin and subjecting the surface to an activation treatment, a more uniform and strongly active surface can be obtained.
活性化処理としては、コロナ処理が適当で処理の度合と
しては、JIS K-6768の方法でぬれ表面張力が46〜54dyne
/cmが望ましい。Corona treatment is suitable as the activation treatment, and the degree of treatment is JIS K-6768 with a wet surface tension of 46 to 54 dyne.
/ Cm is desirable.
かくして得られたシート表面は充分に活性化され、紫外
線硬化型インキを表面に密着させるにあたり、プライマ
ー処理を施す事なく、密着性のある塗膜を形成する事が
できる。The surface of the sheet thus obtained is sufficiently activated, and when the UV curable ink is brought into close contact with the surface, it is possible to form a coating film having an adhesive property without performing a primer treatment.
経時によるインキの密着性の低下に関してもポリプロピ
レン樹脂、高密度ポリエチレン樹脂、またはそれらのブ
レンド物の配合系および一定の割合で極性基を有するエ
チレン系のコポリマーまたはターポリマーを添加した配
合系と比較すると、促進試験後も、充分にインキとの密
着性を保持しており、エチレン−α−オレフイン共重合
樹脂が有効に作用している。Regarding the deterioration of ink adhesion with time, comparing with the blending system of polypropylene resin, high-density polyethylene resin, or a blend thereof, and the blending system in which a polar group-containing ethylene copolymer or terpolymer is added Even after the accelerated test, the adhesiveness to the ink was sufficiently retained, and the ethylene-α-olefin copolymer resin worked effectively.
密着性の機構については不明な点もあるが、ポリプロピ
レン樹脂、高密度ポリエチレン樹脂、またはそのブレン
ド物に添加されたエチレン−α−オレフイン共重合樹脂
が溶融時均一に分散し結晶化する時にポリプロピレン樹
脂、高密度ポリエチレン樹脂とエチレン−α−オレフイ
ン共重合樹脂との結晶化温度の違いによりポリプロピレ
ン樹脂、高密度ポリエチレン樹脂の結晶が成長する時に
エチレン−α−オレフイン共重合樹脂がシートの表面に
均一に分散するために通常の樹脂組成物よりも表面硬度
が低くなるためにインキの溶剤との相溶性が良くなるた
めだと考えられる。Although there are some unclear points about the mechanism of adhesion, polypropylene resin, high-density polyethylene resin, or a polypropylene resin when the ethylene-α-olefin copolymer resin added to the blend is uniformly dispersed and crystallized during melting. Due to the difference in crystallization temperature between the high-density polyethylene resin and the ethylene-α-olefin copolymer resin, the ethylene-α-olefin copolymer resin is uniformly distributed on the surface of the sheet when the polypropylene resin and the high-density polyethylene resin crystals grow. It is considered that this is because the dispersion causes the surface hardness to be lower than that of a normal resin composition, and thus the compatibility of the ink with the solvent is improved.
次に本発明の具体的実施例と比較例とによって、さらに
詳しく説明する。Next, a more detailed description will be given with reference to specific examples of the present invention and comparative examples.
実施例1 ポリプロピレン(密度0.91、商品名WF319、住友化学
製)高密度ポリエチレン(密度0.963、商品名4010、東
ソー製)7:3のブレンド物100重量部に対して、ステ
アリン酸モノグリセリドを1重量部とエチレン−α−オ
レフイン系ポリマーを表1の割合で添加し、40m/mφ
T型ダイスを付した押出機にて押出し成形後、シート表
面にコロナ処理を施し、シートサンプルを作成し、シー
トサンプルをRTテスターを使用しインキを展色後紫外
線を照射し、サンプルを作成した。Example 1 Polypropylene (density 0.91, trade name WF319, manufactured by Sumitomo Chemical) High-density polyethylene (density 0.963, trade name 4010, manufactured by Tosoh) 1 part by weight of stearic acid monoglyceride to 100 parts by weight of a blend of 7: 3 And ethylene-α-olefin polymer were added at the ratio shown in Table 1, and 40 m / mφ
After extrusion molding with an extruder equipped with a T-type die, corona treatment was applied to the surface of the sheet to prepare a sheet sample, and the sheet sample was prepared by irradiating ultraviolet rays after the ink was developed using an RT tester to prepare a sample. .
その結果を表1に示す。The results are shown in Table 1.
実施例2 実施例1におけるポリプロピレンと高密度ポリエチレン
との7:3のブレンド物にかわって、ポリプロピレン
(WF−319)及び高密度ポリエチレン(4010)
をそれぞれ単独で100重量部使用し、他は同じ配合で同
様の操作を行う。 Example 2 Instead of the 7: 3 blend of polypropylene and high density polyethylene in Example 1, polypropylene (WF-319) and high density polyethylene (4010).
100 parts by weight of each of the above are used alone, and the same operation is performed with the other components having the same composition.
結果を表−2に示す。The results are shown in Table-2.
実施例3 実施例1におけるステアリン酸モノグリセリド1重量部
にかえて各種の静電防止剤を表3の割合で添加し、同様
の操作をして、その結果を表3に示す。 Example 3 In place of 1 part by weight of stearic acid monoglyceride in Example 1, various antistatic agents were added in the proportions shown in Table 3, the same operation was carried out, and the results are shown in Table 3.
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 C08L 23:04 23:08) Continuation of front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area C08L 23:04 23:08)
Claims (1)
エチレン樹脂もしくはそれらのブレンド物100重量部
に対し、エチレン−α−オレフイン共重合体樹脂1〜5
0重量部添加し、この配合物100重量部に対してモノ
グリセリン樹脂酸エステル系静電防止剤を0.01〜2.0
重量部添加した印刷性の改善された樹脂組成物。1. An ethylene-α-olefin copolymer resin 1 to 5 per 100 parts by weight of a crystalline polypropylene resin or a high-density polyethylene resin or a blend thereof.
0 parts by weight was added, and 0.01 to 2.0 of the monoglycerin resin acid ester antistatic agent was added to 100 parts by weight of this compound.
A resin composition having improved printability, which is added by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2234198A JPH0621204B2 (en) | 1990-09-03 | 1990-09-03 | Resin composition with improved printability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2234198A JPH0621204B2 (en) | 1990-09-03 | 1990-09-03 | Resin composition with improved printability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04114047A JPH04114047A (en) | 1992-04-15 |
| JPH0621204B2 true JPH0621204B2 (en) | 1994-03-23 |
Family
ID=16967226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2234198A Expired - Lifetime JPH0621204B2 (en) | 1990-09-03 | 1990-09-03 | Resin composition with improved printability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0621204B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006055384A1 (en) * | 2006-11-22 | 2008-05-29 | Phoenix Contact Gmbh & Co. Kg | Process for improving the wettability and / or adhesion of plastic surfaces, in particular for ease of printability |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2645298B2 (en) * | 1986-12-10 | 1997-08-25 | 住友化学工業株式会社 | Polypropylene sheet for printing |
| JPH0813894B2 (en) * | 1987-05-25 | 1996-02-14 | 出光石油化学株式会社 | Polypropylene film for metal deposition |
-
1990
- 1990-09-03 JP JP2234198A patent/JPH0621204B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04114047A (en) | 1992-04-15 |
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