JPS63182546A - Method for evaluating strength of coated film for magnetic recording medium - Google Patents
Method for evaluating strength of coated film for magnetic recording mediumInfo
- Publication number
- JPS63182546A JPS63182546A JP1468987A JP1468987A JPS63182546A JP S63182546 A JPS63182546 A JP S63182546A JP 1468987 A JP1468987 A JP 1468987A JP 1468987 A JP1468987 A JP 1468987A JP S63182546 A JPS63182546 A JP S63182546A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- magnetic
- vessel
- coated
- residue
- 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
- 238000000034 method Methods 0.000 title claims description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 150000008282 halocarbons Chemical class 0.000 claims abstract description 4
- 239000006247 magnetic powder Substances 0.000 claims abstract description 3
- 150000002576 ketones Chemical class 0.000 claims abstract 3
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 abstract description 3
- 229920002799 BoPET Polymers 0.000 abstract description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000006228 supernatant Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 2
- 239000011247 coating layer Substances 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は磁気記録媒体の塗膜強度を評価する方法に関す
るものである０
従来の技術
磁気記録媒体は年々高密度記録化に向けて研究開発が行
われている。現在の媒体の磁性層は、磁性粉、バインダ
、潤滑剤、耐電防止剤、その他添加剤等の複合材料で構
成されており、耐久性を向上させるために様々な材料が
検討されている。耐２ヘ一／′
人件は塗膜強度やヘッド摩耗が良くなれば向上すると考
えられる。この塗膜強度は従来スガ摩耗やスクラッチ試
験、また溶剤を含んだ布等でこすり往復運動をさせ、布
への付着色等で評価を行っていた。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for evaluating the strength of a coating film of a magnetic recording medium.0 Prior ArtMagnetic recording media are being researched and developed year by year toward higher recording density. It is being said. The magnetic layer of current media is composed of composite materials such as magnetic powder, binder, lubricant, antistatic agent, and other additives, and various materials are being studied to improve durability. It is thought that the labor force will improve if the coating strength and head wear improve. The strength of this coating film has conventionally been evaluated using suga abrasion and scratch tests, or by rubbing with a cloth containing a solvent in a reciprocating motion, and checking the color attached to the cloth.
発明が解決しようとする問題点
このような評価方法では容易で正確な再現性のある測定
が難しく、寸だ塗膜強度が何に起因しているのかよくわ
からず、材料検討へのフィードバックができないという
問題点を有していたというのは、塗膜強度は、バインダ
に大きく関与していると考えられるが、従来の方法では
明らかでなく、バインダの硬化性つまり架橋度と塗膜強
度の関係は正確には理解されていなかった。Problems that the invention aims to solve: With this evaluation method, it is difficult to measure easily, accurately, and with reproducibility, and it is not clear what causes the coating film strength, and it is not possible to provide feedback for material studies. The reason for this problem is that, although the strength of the coating film is thought to be largely related to the binder, it is not clear with conventional methods that the relationship between the hardenability of the binder, that is, the degree of crosslinking, and the strength of the coating film. was not accurately understood.
本発明はこの問題点を解決するもので、塗膜強度とバイ
ンダの硬化性の関連について明らかにする方法を提供す
るものである。The present invention solves this problem and provides a method for clarifying the relationship between coating film strength and binder curability.
問題点を解決するだめの手段
上記問題点を解決するために本発明は磁気記録媒体をハ
ロゲン化炭化水素、エーテル、またはケ３ｔ・−７
トン系溶剤に浸漬し、未硬化バインダを溶剤に溶解させ
、その溶出量によって樹脂の硬化性を測定し、塗膜強度
を評価するものである。Means for Solving the Problems In order to solve the above problems, the present invention involves immersing a magnetic recording medium in a halogenated hydrocarbon, ether, or ket-based solvent, and dissolving the uncured binder in the solvent. The curability of the resin is measured based on the amount of elution, and the strength of the coating film is evaluated.
作 用
本発明はこのような方法により、媒体の未硬化つまり架
橋していないバインダ量を測定する事により塗膜強度を
評価する事ができるものである。Function The present invention makes it possible to evaluate coating film strength by measuring the amount of uncured, ie, uncrosslinked, binder in the medium.
実施例
以下本発明の実施例について、図面を参照しながら説明
する。EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.
実施例１
１０μｍ厚のＰＥＴフィルム上に覆合材料から成る磁性
層を塗布し、裏面にはバックコート層を設けた８陥磁気
テ一プ４種類のサンプル（Ａ−Ｄ）についてバックコー
ト層をテトラヒドロフランで除去したものを夫々面積１
８５ｃｄ（長さ２３０ｃｍ ）に切りとり、３０ ｍｌ
容器の中へ入れ、サンプルが全部浸るように２０ ｍｌ
のテトラヒドロフランを容器の中へ入れた。容器を密封
し、超音波洗浄器にかけて３０分間の超音波振動を与え
て樹脂成分を溶出させた後、サンプルを容器から取り出
し、容器を遠心分離機にかけて、上澄み液を前もって重
量を測定したアルミカップに入れた。ウォーターバス上
でアルミカップ中の溶剤を蒸発乾固させて、残留物の重
量を測定した。Example 1 A magnetic layer made of a covering material was coated on a 10 μm thick PET film, and a back coat layer was applied to four types of 8-concave magnetic tape samples (A-D) on the back side. Area 1 of each area removed with tetrahydrofuran
Cut into 85cd (230cm long) and 30ml
Pour 20 ml into the container so that the sample is completely submerged.
of tetrahydrofuran was put into the container. After sealing the container and applying ultrasonic vibration for 30 minutes in an ultrasonic cleaner to elute the resin component, remove the sample from the container, centrifuge the container, and transfer the supernatant liquid to an aluminum cup whose weight has been measured in advance. I put it in. The solvent in the aluminum cup was evaporated to dryness on a water bath and the weight of the residue was measured.
この残留物をＦＴ−ＩＲにより分析を行うと、バインダ
が主成分であった。従ってこの方法により塗膜の未硬化
つまり架橋していないバインダの量が求められた。When this residue was analyzed by FT-IR, it was found that the main component was a binder. This method therefore determined the amount of uncured or uncrosslinked binder in the coating.
次に従来の塗膜強度の評価方法として第３図に示すスク
ラッチテスターを用いてスクラッチ試験を行った。サン
プル４をガラスプレート５に接着させ、それをステージ
台６にのせる。ウェイトバランサ７の荷重を４０２にし
、アーム８にとりつけた鋼球９の摩耗径を測定すること
によって塗膜の機械的評価を行った。Next, as a conventional method for evaluating coating film strength, a scratch test was conducted using a scratch tester shown in FIG. A sample 4 is adhered to a glass plate 5 and placed on a stage stand 6. The coating film was mechanically evaluated by setting the load of the weight balancer 7 to 402 and measuring the wear diameter of the steel ball 9 attached to the arm 8.
以上の試験結果を第１表に示す。The above test results are shown in Table 1.
（Ｘ−１，Ｃ下片、も）
６ ベー、・
第１表
第１図はこの結果を縦軸に鋼球摩耗量、横軸に残留物量
をとりグラフに表わしたもので、鋼球摩耗量の少ない媒
体は残留物量が少なくバインダの硬化性が高いつまり架
橋度が大きい事を表し、鋼球摩耗量の大きい媒体はバイ
ンダの硬化性が少ない事を表し、両者の相関関係から塗
膜強度がこの残留物の測定によって評価されることが明
らかである。(X-1, lower piece of C, also) 6. Table 1 Figure 1 shows these results in a graph with the amount of steel ball wear on the vertical axis and the amount of residue on the horizontal axis. A small amount of media indicates a small amount of residue and high binder hardenability, that is, a high degree of crosslinking.A medium with a large amount of steel ball wear indicates a low binder hardenability, and from the correlation between the two, the coating film strength It is clear that this can be evaluated by measuring this residue.
実施例２
実施例１と同じサンプルについて、テトラヒドロ ペー
ジ
ロフランの代りにクロロホルム、メチルエチルケトン、
シクロヘキサノン、およびトルエンを用いてそれぞれ実
施例１と同様に樹脂成分を溶出させて測定し、またスク
ラッチテスターで塗膜強度を測定した。Example 2 For the same sample as in Example 1, chloroform, methyl ethyl ketone, and
The resin components were eluted and measured using cyclohexanone and toluene in the same manner as in Example 1, and the coating film strength was also measured using a scratch tester.
この硬化性とスクラッチ試験の結果を第２表に示すＯ
第２表
第２図はとの結果を縦軸に鋼球摩耗量、横軸に残留物量
をとりグラフにしたもので、グラフから■。The results of this hardenability and scratch test are shown in Table 2. Table 2 Figure 2 is a graph of the results with the steel ball wear amount on the vertical axis and the amount of residue on the horizontal axis. .
■、■については実施例１と同様の結果となって７へ−
７
いるが■は硬化性の差が明らかではない。すなわち、ト
ルエンには本発明の方法が実施されないことがわかる。As for ■ and ■, the results are the same as in Example 1, so proceed to 7.
7, but the difference in hardenability is not clear for ■. That is, it can be seen that the method of the present invention cannot be applied to toluene.
発明の効果
以上のように本発明によれば、特定溶剤において塗膜強
度とバインダーの硬化性の相関関係から、溶出した樹脂
成分量を測定することにより塗膜強度の評価を簡便にす
ることができる。Effects of the Invention As described above, according to the present invention, it is possible to easily evaluate coating film strength by measuring the amount of eluted resin component based on the correlation between coating film strength and binder curability in a specific solvent. can.
【図面の簡単な説明】
第１図、第２図は本発明の評価方法を説明するだめの、
残留物量と摩耗試験の関係を示すグラフであり、第３図
は従来の塗膜強度評価方法のスクラッチテスターを説明
する図である。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
ｎｖ 物ｆ Ｃｍｑノ
第２図[Brief Description of the Drawings] Figures 1 and 2 are for explaining the evaluation method of the present invention.
FIG. 3 is a graph showing the relationship between the amount of residue and an abrasion test, and FIG. 3 is a diagram illustrating a scratch tester of a conventional coating film strength evaluation method. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Diagram nv Thing f Cmq No. 2
Claims (1)
せた磁性層を塗布して成る磁気記録媒体を、ハロゲン化
炭化水素、エーテル、またはケトン系溶剤に浸漬し、前
記磁性層から溶出する樹脂成分量を測定してその塗膜強
度を評価することを特徴とする磁気記録媒体の塗膜強度
評価方法。A magnetic recording medium consisting of a non-magnetic support coated with a magnetic layer in which magnetic powder is dispersed in a binder resin is immersed in a halogenated hydrocarbon, ether, or ketone solvent to remove the magnetic layer from the magnetic layer. A method for evaluating coating film strength of a magnetic recording medium, which comprises measuring the amount of resin components eluted to evaluate the coating film strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1468987A JPH0690125B2 (en) | 1987-01-23 | 1987-01-23 | Method for evaluating coating film strength of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1468987A JPH0690125B2 (en) | 1987-01-23 | 1987-01-23 | Method for evaluating coating film strength of magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63182546A true JPS63182546A (en) | 1988-07-27 |
| JPH0690125B2 JPH0690125B2 (en) | 1994-11-14 |
Family
ID=11868164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1468987A Expired - Lifetime JPH0690125B2 (en) | 1987-01-23 | 1987-01-23 | Method for evaluating coating film strength of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0690125B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100491624B1 (en) * | 2002-06-17 | 2005-05-27 | 주식회사 참테크 | A state painting inspection machine of handyphone case the surface |
-
1987
- 1987-01-23 JP JP1468987A patent/JPH0690125B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100491624B1 (en) * | 2002-06-17 | 2005-05-27 | 주식회사 참테크 | A state painting inspection machine of handyphone case the surface |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0690125B2 (en) | 1994-11-14 |
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