JP2005089914A - Method for producing separate paper and coating apparatus - Google Patents
Method for producing separate paper and coating apparatus Download PDFInfo
- Publication number
- JP2005089914A JP2005089914A JP2003326158A JP2003326158A JP2005089914A JP 2005089914 A JP2005089914 A JP 2005089914A JP 2003326158 A JP2003326158 A JP 2003326158A JP 2003326158 A JP2003326158 A JP 2003326158A JP 2005089914 A JP2005089914 A JP 2005089914A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- coating
- release agent
- silicone release
- paper
- 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
- 238000000576 coating method Methods 0.000 title claims abstract description 86
- 239000011248 coating agent Substances 0.000 title claims abstract description 85
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 75
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 71
- 239000000758 substrate Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 abstract description 28
- 230000007547 defect Effects 0.000 abstract description 3
- 239000000123 paper Substances 0.000 description 47
- 239000000853 adhesive Substances 0.000 description 14
- 230000001070 adhesive effect Effects 0.000 description 14
- 125000006038 hexenyl group Chemical group 0.000 description 14
- 239000007788 liquid Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 11
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 5
- 229920002050 silicone resin Polymers 0.000 description 5
- 238000001723 curing Methods 0.000 description 4
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000012644 addition polymerization Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000011086 glassine Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Coating Apparatus (AREA)
- Paper (AREA)
Abstract
Description
本発明は粘着シールの保護等に用いられる剥離紙の製造方法に関し、又、剥離紙の製造に用いて好適な塗工装置に関する。 The present invention relates to a method for producing release paper used for protecting an adhesive seal and the like, and also relates to a coating apparatus suitable for use in producing release paper.
従来、粘着ラベルや粘着シールの粘着面には易剥離性の剥離紙が貼着され、使用前は粘着面を保護し、剥離紙を剥離してラベルを使用するようになっている。このような剥離紙としては、基材である紙、フィルム等の表面に易剥離性のシリコーン樹脂（シリコーン剥離剤）をロール塗布したものが用いられている。ここで、シリコーン剥離剤の塗布方法としては、溶剤型のシリコーン剥離剤を塗布する方法や、無溶剤型シリコーン剥離剤を塗布する方法が挙げられる（例えば、特許文献１参照）。そして、塗布したシリコーン剥離剤を乾燥させたり、紫外線照射することで硬化させ、塗膜を形成させている。 Conventionally, an easily peelable release paper is attached to the adhesive surface of an adhesive label or an adhesive seal, the adhesive surface is protected before use, and the release paper is peeled off to use the label. As such a release paper, a roll of an easily peelable silicone resin (silicone release agent) is used on the surface of a base material such as paper or film. Here, examples of the method for applying the silicone release agent include a method for applying a solvent-type silicone release agent and a method for applying a solventless silicone release agent (for example, see Patent Document 1). Then, the applied silicone release agent is dried or cured by irradiating with ultraviolet rays to form a coating film.
しかしながら、上記した従来技術の場合、次のような問題があった。まず、溶剤型のシリコーン樹脂（シリコーン剥離剤）を塗布する場合、環境問題ヘの対応から溶剤の回収設備が必要となる問題がある。一方、無溶剤型シリコーン剥離剤の場合、このような問題は生じないが、溶剤を用いないために塗工量が少なく、その結果として塗工ムラが生じ易く、その部分でシリコーン剥離剤の塗膜が形成されずに剥離力が高くなる（重剥離となる）問題がある。この塗工ムラは、主に基材から転移し、塗工ロール（コーティングロール）に付着した異物やロールの傷により生じるが、溶剤型のシリコーン剥離剤の場合は溶剤で樹脂を希釈しているため、塗工液の粘度が低く塗工量も多い。従って、一旦生じた塗工ムラの部分に溶剤が回り込んだり異物が浮上し、ムラが解消されるので、溶剤型のシリコーン剥離剤の場合に重剥離に至ることは少ない。しかしながら、塗工量の少ない無溶剤型シリコーン剥離剤の場合、一度生じた塗工ムラはそのまま未塗布となり、重剥離となってしまう。 However, the prior art described above has the following problems. First, when a solvent type silicone resin (silicone release agent) is applied, there is a problem that a solvent recovery facility is required in order to cope with environmental problems. On the other hand, in the case of a solvent-free silicone release agent, such a problem does not occur, but since no solvent is used, the coating amount is small, and as a result, coating unevenness easily occurs. There is a problem that the peeling force is increased without forming a film (becomes heavy peeling). This coating unevenness is mainly caused by the transfer from the base material and foreign matter adhering to the coating roll (coating roll) or scratches on the roll. In the case of a solvent-type silicone release agent, the resin is diluted with a solvent. Therefore, the viscosity of the coating liquid is low and the coating amount is large. Accordingly, the solvent wraps around the once-applied coating unevenness or the foreign matter floats and the unevenness is eliminated. Therefore, in the case of the solvent-type silicone release agent, there is little possibility of heavy peeling. However, in the case of a solventless silicone release agent having a small coating amount, the coating unevenness once generated becomes uncoated as it is, and heavy peeling occurs.
本発明は上記した間題点に鑑みてなされたもので、無溶剤型シリコーン剥離剤を用いた場合の塗膜欠陥を抑制できる剥離紙の製造方法及び塗工装置を提供することを目的とする。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a release paper manufacturing method and a coating apparatus that can suppress coating film defects when a solventless silicone release agent is used. .
上記した目的を達成するために、本発明の剥離紙の製造方法は、基材の少なくとも一方の面に無溶剤型のシリコーン剥離剤をロールコータを用いて２回以上に分けて塗布した後、該シリコーン剥離剤を硬化させることを特徴とする。 In order to achieve the above-described object, the method for producing a release paper of the present invention is a method of applying a solventless silicone release agent to at least one surface of a substrate in two or more portions using a roll coater. The silicone release agent is cured.
又、本発明の剥離紙の製造方法は、基材の少なくとも一方の面に無溶剤型のシリコーン剥離剤を２回以上に分けて塗布し、かつ一回毎の塗布量を１ｇ／ｍ２以下とし、塗布後に該シリコーン剥離剤を硬化させることを特徴とする。 Further, in the method for producing a release paper of the present invention, the solventless silicone release agent is applied to at least one surface of the substrate in two or more times, and the application amount per time is 1 g / m 2 or less. And the silicone release agent is cured after application.
前記シリコーン剥離剤の塗布量の合計が２ｇ／ｍ２以下であることが好ましい。 The total coating amount of the silicone release agent is preferably 2 g / m 2 or less.
本発明の塗工装置は、走行する基材を支持するバックアップロールと、該バックアップロールに対向し前記基材に塗工する第１の塗工ロールと、該第１の塗工ロールと離間して該バックアップロールに対向し前記基材に塗工する第２の塗工ロールとを備えたことを特徴とする。 The coating apparatus of the present invention includes a backup roll that supports a traveling base material, a first coating roll that faces the backup roll and that is applied to the base material, and is spaced apart from the first coating roll. And a second coating roll that is applied to the substrate so as to face the backup roll.
本発明によれば、無溶剤型のシリコーン剥離剤を２回以上に分けて塗布した後、硬化させるので、塗工ムラに起因して剥離力が高くなる塗膜欠陥（重剥離）を解消することができる。 According to the present invention, since the solventless silicone release agent is applied in two or more steps and then cured, it eliminates coating film defects (heavy peeling) that increase the peeling force due to coating unevenness. be able to.
以下、本発明の剥離紙の製造方法の一実施形態について説明する。まず、剥離紙に用いる基材は特に制限はなく、例えば紙、樹脂フィルムを用いることができ、具体的にはグラシン紙、ＰＥ（ポリエチレン）紙を挙げることができる。基材の形態も特に制限はなく、ロール状（巻取り紙）、シート状のものを用いることができる。そして、基材の片面又は両面にシリコーン剥離剤を塗布することにより剥離紙が製造される。本発明に用いるシリコーン剥離剤は無溶剤型であり、例えば不飽和結合を有するポリシロキサンとシロキサンとを含有し、両者を付加重合させて硬化させるタイプが挙げられる。この無溶剤型のシリコーン剥離剤は、塗布後に例えば熱硬化や紫外線硬化を行うことにより硬化し、塗膜が形成される。 Hereinafter, an embodiment of a method for producing a release paper of the present invention will be described. First, the base material used for the release paper is not particularly limited, and for example, paper or a resin film can be used, and specific examples include glassine paper and PE (polyethylene) paper. There is no restriction | limiting in particular also in the form of a base material, A roll-like (winding paper) and a sheet-like thing can be used. And a release paper is manufactured by apply | coating a silicone release agent to the single side | surface or both surfaces of a base material. The silicone release agent used in the present invention is a solvent-free type, and includes, for example, a type containing polysiloxane having an unsaturated bond and siloxane, and curing both by addition polymerization. This solventless type silicone release agent is cured by applying, for example, heat curing or ultraviolet curing after application to form a coating film.
そして、本発明の剥離紙の製造方法は、基材の少なくとも一方の面に無溶剤型のシリコーン樹脂（シリコーン剥離剤）を２回以上に分けて塗布した後、該シリコーン剥離剤を硬化させることを骨子とする。つまり、塗工ロール等を用いてシリコーン剥離剤を基材に塗布する際、基材からの転移により、ロールに付着した異物やロールの傷により、塗工ムラが生じるが、この塗工層が硬化する前に、ウェット状態で２回日（又はこれに加えて３回目以上）の塗布を行うことで、１回目の塗布で生じた塗工ムラの上に新たに塗布をするので、塗工ムラを解消して重剥離を防止できる。 In the release paper manufacturing method of the present invention, a solventless silicone resin (silicone release agent) is applied to at least one surface of the substrate in two or more portions, and then the silicone release agent is cured. Is the main point. In other words, when applying a silicone release agent to a substrate using a coating roll or the like, due to the transfer from the substrate, foreign matter adhering to the roll or scratches on the roll may cause coating unevenness. Before curing, it is applied twice a day (or in addition to it for the third time or more) in a wet state, so that a new application is applied on the coating unevenness generated by the first application. Unevenness can be eliminated and heavy peeling can be prevented.
１回毎の塗布においては、同一のシリコーン剥離剤を用いてもよく、異なるシリコーン剥離剤を用いてもよい。例えば基材との密着性の悪いシリコーン剥離剤を塗布したい場合に、第１回目の塗布でこの基材との密着性に優れたシリコーン剥離剤を下塗りしておくことで、その上に塗布するシリコーン剥離剤の密着性を改善できる。なお、基材との密着性の悪いシリコーン剥離剤としては、例えばポリシロキサンの不飽和結合がヘキセニル基であるものが挙げられ、基材との密着性の優れたシリコーン剥離剤としては、例えばポリシロキサンの不館和結合がビニル基であるものが挙げられる。 In each application, the same silicone release agent may be used, or different silicone release agents may be used. For example, if you want to apply a silicone release agent with poor adhesion to the base material, apply a silicone release agent with excellent adhesion to the base material in the first application, and then apply it on it. The adhesion of the silicone release agent can be improved. Examples of the silicone release agent having poor adhesion to the base material include those in which the unsaturated bond of the polysiloxane is a hexenyl group, and examples of the silicone release agent having excellent adhesion to the base material include polysiloxane. Examples thereof include those in which the dissociative bond of siloxane is a vinyl group.
また、本発明の一実施形態ではロールコータを用いて塗工を行う。この理由について説明すると、無溶剤型シリコーン剥離剤を用いる場合、そもそも塗工量を少なくする必要があり、塗工量が少なくとも均一な塗工が可能な方法としてロールコータ法を採用したものである。そして、塗工量が少なくなる結果、これまでは問題とならなかった塗工ムラが顕在化してきたという経緯がある。 In one embodiment of the present invention, coating is performed using a roll coater. Explaining this reason, when using a solvent-free silicone release agent, it is necessary to reduce the coating amount in the first place, and the roll coater method is adopted as a method capable of at least uniform coating. . As a result of the decrease in the coating amount, coating unevenness that has not been a problem until now has become apparent.
一方、本発明の別の実施形態では一回毎の塗布量を１ｇ／ｍ２以下としている。この理由も上記と同様、無溶剤型シリコーン樹脂（シリコーン剥離剤）を用いる場合に塗工量を少なくする必要から生じたものである。特に、塗工ロール等の性能上の問題等から、通常は０．３ｇ／ｍ２程度を下限とするのが好ましい。又、シリコーン剥離剤の塗布量の合計を２ｇ／ｍ２以下とするのが好ましい。特に、第１回目の塗布によってアンダー層を形成させるため、これに用いるシリコーン剥離剤としては基材との密着が良いものが好ましい。また、最終回の塗布によって形成されるトップ層が剥離紙の剥離性能に影響を与えるため、トップ層の塗布量を他の層の塗布量より多くすることが好ましい。 On the other hand, in another embodiment of the present invention, the application amount per time is set to 1 g / m 2 or less. Similarly to the above, this reason also arises from the need to reduce the coating amount when using a solvent-free silicone resin (silicone release agent). In particular, it is usually preferable to set the lower limit to about 0.3 g / m 2 in view of performance problems such as coating rolls. The total amount of the silicone release agent applied is preferably 2 g / m 2 or less. In particular, since the under layer is formed by the first application, the silicone release agent used for this is preferably one that has good adhesion to the substrate. In addition, since the top layer formed by the final coating affects the peeling performance of the release paper, it is preferable that the coating amount of the top layer is larger than the coating amount of the other layers.
次に、本発明の製造方法を適用するのに好適な塗工装置の一実施形態について図１を参照して説明する。この図において、塗工装置は、バックアップロール（以下、「Ｂロール」と略記）２、第１の塗工ロール群１０、第２の塗工ロール群２０を備え、Ｂロール２の外周には基材３０が巻回され、Ｂロール２の右回転に応じて基材３０がＢロール２の右側から入り、Ｂロール２の左側から出るように走行している。基材３０は、上記した剥離紙に用いる紙や樹脂フィルム等からなる。 Next, an embodiment of a coating apparatus suitable for applying the manufacturing method of the present invention will be described with reference to FIG. In this figure, the coating apparatus includes a backup roll (hereinafter abbreviated as “B roll”) 2, a first coating roll group 10, and a second coating roll group 20. The base material 30 is wound so that the base material 30 enters from the right side of the B roll 2 and exits from the left side of the B roll 2 according to the right rotation of the B roll 2. The base material 30 consists of paper, a resin film, etc. which are used for the above-mentioned release paper.
第１の塗工ロール群１０は、図の左から右へ第１の塗工ロール（以下、「Ｔ１ロール」と略記）１１、中間ロール（以下、「Ｍ１ロール」と略記）１２、エンドロール（以下、「Ａ１ロール」と略記）１３の順に直列配置して構成され、Ｔ１ロール１１がＢロール２の右側面に対向し基材３０の表面に接触している。又、Ｍ１ロール１２とＡ１ロール１３の対向面の上側部分が液ダム（液溜め）４となっていて、ここに第１の塗工液が保持されている。そして、第１の塗工液は、液ダム４からＭ１ロール１２、Ｔ１ロール１１を経て基材３０に塗布される。 The first coating roll group 10 includes a first coating roll (hereinafter abbreviated as “T1 roll”) 11, an intermediate roll (hereinafter abbreviated as “M1 roll”) 12, an end roll (from the left to the right in the figure). Hereinafter, the abbreviated as “A1 roll”) is arranged in series in the order of 13, and the T1 roll 11 is opposed to the right side surface of the B roll 2 and is in contact with the surface of the substrate 30. Moreover, the upper part of the opposing surface of M1 roll 12 and A1 roll 13 is the liquid dam (liquid reservoir) 4, and the 1st coating liquid is hold | maintained here. The first coating liquid is applied to the base material 30 from the liquid dam 4 through the M1 roll 12 and the T1 roll 11.
同様に、第２の塗工ロール群２０は、図の右から左ヘ第２の塗工ロール（以下、「Ｃロール」と略記）２１、２段ロール（以下、「Ｔ２ロール」と略記）２２、中間ロール（以下、「Ｍ２ロール」と略記）２３、エンドロール（以下、「Ａ２ロール」と略記）２４の順に直列配置して構成され、Ｃロール２１がＢロール２の下面に対向し基材３０に接触している。又、Ｍ２ロール２３とＡ２ロール２４の対向面の上側部分が液ダム（液留め）６となっていて、ここに第２の塗工液が保持されている。そして、第２の塗工液は、液ダム６からＭ２ロール２３、Ｔ２ロール２４、Ｃロール２１を経て基材３０に塗布される。 Similarly, the second coating roll group 20 includes a second coating roll (hereinafter abbreviated as “C roll”) 21 and a two-stage roll (hereinafter abbreviated as “T2 roll”) from right to left in the drawing. 22, intermediate roll (hereinafter abbreviated as “M2 roll”) 23, end roll (hereinafter abbreviated as “A2 roll”) 24, arranged in series in this order, C roll 21 facing the lower surface of B roll 2 It is in contact with the material 30. Moreover, the upper part of the opposing surface of the M2 roll 23 and the A2 roll 24 is a liquid dam (liquid retainer) 6 where the second coating liquid is held. Then, the second coating liquid is applied to the substrate 30 from the liquid dam 6 through the M2 roll 23, the T2 roll 24, and the C roll 21.
なお、この実施形態では、Ｂロール２、Ｍ１ロール１２、Ｔ２ロール２２、Ａ２ロール２４はそれぞれ金属ロールであり、その他のロールはゴムロール（又はポリウレタンロール）である。 In this embodiment, the B roll 2, the M1 roll 12, the T2 roll 22, and the A2 roll 24 are each a metal roll, and the other rolls are rubber rolls (or polyurethane rolls).
そして、Ｂロール２が右回転すると、基材３０がＢロール２の右側から入り、ここでＴ１ロール１１によって第１の塗工液が基材３０に塗布され、さらにウェット状態のまま、次にＣロール２１によって第２の塗工液が基材３０に塗布される。さらに、塗布後の基材３０は、Ｂロール２の左側から出た後、所定の乾燥機４０により乾燥され、塗膜が硬化する。 Then, when the B roll 2 rotates to the right, the base material 30 enters from the right side of the B roll 2, where the first coating liquid is applied to the base material 30 by the T1 roll 11, and further remains wet, The second coating liquid is applied to the substrate 30 by the C roll 21. Furthermore, after the application | coating base material 30 comes out from the left side of the B roll 2, it is dried with the predetermined dryer 40, and a coating film hardens | cures.
なお、塗工ロール群におけるロール数が多いほど、高い粘度の塗工液を均一に塗布することができる。上記実施形態では塗工ロール群を２つとしたが、塗工ロール群を３以上設けてもよい。この場合、各塗工ロール群における塗工ロールはそれぞれ離間しつつ、バックアップロールに対向することとなる． In addition, the higher the number of rolls in the coating roll group, the higher the viscosity of the coating liquid can be applied uniformly. In the above embodiment, two coating roll groups are provided, but three or more coating roll groups may be provided. In this case, the coating rolls in each coating roll group are opposed to the backup roll while being separated from each other.
本発明は上記各実施例に限定されず、本発明の技術思想の範囲内において、各実施例は適宜変更され得ることは明らかである。 The present invention is not limited to the above embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention.
（実施例）
１．実験準備
以下の塗工装置、基材、及び無溶剤シリコーン樹指（以下、「シリコーン剥離剤」と称する）を準備した。
塗工装置：グラビア印刷に用いる展色機（品名：ＲＩテスター、熊谷理機工業社製）
基材：グラシン紙（坪量７３ｇ／ｍ２）
ビニル基含有の無溶剤シリコーン剥離剤１（以下、「ビニル基タイプのシリコーン剥離剤」と称する）：不飽和結合がビニル基であるポリシロキサンとシロキサンとを含有し、両者を付加重合させて硬化させる中剥離型の無溶剤シリコーン剥離剤（品名：ＢＹ２４−４５０１ 東レ・ダウコーニング社製、粘度５０ｍＰａ・Ｓ）
ヘキセニル基含有の無溶剤シリコーン剥離剤２（以下、「ヘキセニル基タイプのシリコーン剥離剤」と称する）：不飴和結合がへキセニル基であるポリシロキサンとシロキサンとを合有し、両者を付加重合させて硬化させる軽剥離型の無溶剤シリコーン剥離剤（品名： ＬＴＣ−１０５７Ｌ 東レ・ダウコーニング社製、粘度２７０ｍＰａ・Ｓ）
(Example)
1. Preparation for Experiment The following coating apparatus, base material, and solventless silicone resin (hereinafter referred to as “silicone release agent”) were prepared.
Coating device: Color display machine used for gravure printing (Product name: RI tester, manufactured by Kumagai Riki Kogyo)
Base material: Glassine paper (basis weight 73 g / m 2 )
Vinyl group-containing solvent-free silicone release agent 1 (hereinafter referred to as “vinyl group-type silicone release agent”): Contains polysiloxane and siloxane whose unsaturated bonds are vinyl groups, and is cured by addition polymerization of both. Medium release type solvent-free silicone release agent (product name: BY24-4501, manufactured by Toray Dow Corning, viscosity 50 mPa · S)
Hexenyl group-containing solvent-free silicone release agent 2 (hereinafter referred to as “hexenyl group-type silicone release agent”): a polysiloxane having a non-unsaturated bond with a hexenyl group and a siloxane, and addition polymerization of both Light release solventless silicone release agent (product name: LTC-1057L, manufactured by Toray Dow Corning Co., Ltd., viscosity 270 mPa · S)
２．実験例１ 2. Experimental example 1
ａ）剥離紙の作製
上記展色機を用い、上記基材に、まずアンダー層としてヘキセニル基タイプのシリコーン剥離剤を塗布した後、展色機のゴムロール及びチルドロールを掃除し、次に該アンダー層がウェット状態（未硬化状態）のまま、その表面にさらにトップ層としてヘキセニル基タイプのシリコーン剥離剤を塗布した。塗布後の基材をオーブンに入れ、１６０℃で２０秒間加熱して塗膜を硬化させ、剥離紙を得た。
この剥離紙を２３℃で５０％ＲＨの環境下で２日間放置した。
ｂ）粘着剤の塗工
次に、この放置後の剥離紙に以下の２種類の粘着剤をそれぞれ塗工した。
粘着剤１：アクリルエマルション系粘着剤（商品名：ＰＣ、リンテック社製）
剥離紙の剥離剤塗布面に乾燥後厚みが３０μｍとなるように粘着剤を塗布し、１ｌ０℃で２分間乾燥した。次に６４ｇ／ｍ２の上質紙を粘着剤塗布面に貼り合わせ、粘着シートと剥離紙の積層体を得た。得られた積層体をガラス板で挟み、約２５ｇ／ｃｍ２の加重を掛けて２３℃で１日間放置し、サンプル片を得た。
粘着剤２：アクリル溶剤型粘着剤（商品名：ＰＡ−Ｔ１、リンテック社製）
１００℃で２分間の乾燥条件とし、上質紙を合成紙（商品名：ユポ８０、ユポ・コーポレーション社製）とし、４０℃で１日間の放置条件としたこと以外は、上記粘着剤１の場合と同一の条件で塗工し、サンプル片を得た。
a) Preparation of release paper Using the above color spreader, first, a hexenyl group type silicone release agent was applied to the base material as an under layer, and then the rubber roll and chilled roll of the color spreader were cleaned, and then the undercoat While the layer was in a wet state (uncured state), a hexenyl group type silicone release agent was further applied to the surface as a top layer. The coated substrate was placed in an oven and heated at 160 ° C. for 20 seconds to cure the coating film to obtain a release paper.
This release paper was left at 23 ° C. in an environment of 50% RH for 2 days.
b) Application of pressure-sensitive adhesive Next, the following two types of pressure-sensitive adhesives were respectively applied to the release paper after being left standing.
Adhesive 1: Acrylic emulsion adhesive (trade name: PC, manufactured by Lintec)
The pressure-sensitive adhesive was applied to the release paper-coated surface of the release paper so that the thickness after drying was 30 μm, and dried at 10 ° C. for 2 minutes. Next, 64 g / m 2 of high-quality paper was bonded to the pressure-sensitive adhesive coated surface to obtain a laminate of the pressure-sensitive adhesive sheet and release paper. The obtained laminate was sandwiched between glass plates, allowed to stand at 23 ° C. for 1 day under a load of about 25 g / cm 2 to obtain a sample piece.
Adhesive 2: Acrylic solvent type adhesive (trade name: PA-T1, manufactured by Lintec Corporation)
In the case of the above adhesive 1 except that the drying condition is 100 ° C. for 2 minutes, the high-quality paper is synthetic paper (trade name: YUPO 80, manufactured by YUPO Corporation), and the standing condition is 40 days at 1 day. Were applied under the same conditions to obtain a sample piece.
上記基材にアンダー層としてビニル基タイプのシリコーン剥離剤を塗布したこと以外は、実施例１と全く同様にして剥離紙及びサンプル片を得た。 A release paper and a sample piece were obtained in exactly the same manner as in Example 1 except that a vinyl group type silicone release agent was applied to the substrate as an under layer.
比較例１
上記基材にヘキセニル基タイプのシリコーン剥離剤を１回のみ塗布したこと以外は実施例１と全く同様にして剥離紙及びサンプル片を得た。
Comparative Example 1
A release paper and a sample piece were obtained in exactly the same manner as in Example 1 except that the hexenyl group type silicone release agent was applied only once to the substrate.
比較例２
上記基材にヘキセニル基タイプのシリコーン剥離剤を塗布してアンダー層を形成し、続いてｌ６０℃で２０秒間加熱硬化させた後、トップ層を形成したこと以外は、実施例１と同様にしてサンプル片を得た。
Comparative Example 2
Except that a hexenyl group type silicone release agent was applied to the substrate to form an under layer, followed by heat curing at 160 ° C. for 20 seconds, and then a top layer was formed. A sample piece was obtained.
評価
各実施例及び比較例について、剥離力及びシリコーン剥離剤の密着性を評価した。
１）剥離力
各サンプル片について、ＪＩＳ Ｚ−０２３７の「１８０度引きはがし粘着力の測定」に準じて剥離力を測定した。
２）シリコーン剥離剤の密着性評価
各サンプル片を４０℃で８０％ＲＨの湿潤環境下に２４時間放置し、シリコーン剥離剤の塗膜面を指で擦り、樹脂の脱落の度合を目視評価し、〇、△、×の３段階に分類した。
○：樹脂の脱落は見られず
△：樹脂の脱落は見られないがスミヤー（ｓｍｅａｒ：擦った部分に曇りを生じること）が生じた
×：樹脂の脱落あり
上記した各実施例におけるシリコーン剥離剤の塗布量、剥離力、及び密着性の評価結果を表１に示す。
Evaluation About each Example and the comparative example, peeling force and the adhesiveness of the silicone release agent were evaluated.
1) Peeling force About each sample piece, peeling force was measured according to "Measurement of 180 degree peeling adhesive force" of JIS Z-0237.
2) Adhesion evaluation of silicone release agent Each sample piece is left in a humid environment of 80% RH at 40 ° C for 24 hours, and the coating surface of the silicone release agent is rubbed with a finger to visually evaluate the degree of resin removal. , ◯, △, ×.
◯: Resin detachment was not observed Δ: Resin detachment was not observed, but smear (smear: fogging occurred on the rubbed part) x: Resin detachment present Silicone release agent in each of the above-described examples Table 1 shows the results of evaluation of the coating amount, peel strength, and adhesion.
表１から明らかなように、各実施例は、剥離力がいずれも比較例１とほぼ同等の値を示し、又、シリコーン剥離剤の経時での脱落や２回塗布による樹脂の脱落も見られなかった。つまり、各実施例の剥離紙は、従来の製法である比較例１の剥離紙と同じ品質が得られることが判明した。一方、比較例２は、１回目と２回目の塗布の間に塗膜を硬化させた結果、シリコーン剥離剤の密着性に劣った。
次に、実施例１、２と比較例１との差異を明らかにするため、意図的に塗工ムラを形成させる以下の実験例２を行った。
As is clear from Table 1, each Example shows a peeling force almost equal to that of Comparative Example 1, and the silicone release agent dropped off over time and the resin dropped off by application twice. There wasn't. That is, it has been found that the release paper of each Example can obtain the same quality as the release paper of Comparative Example 1 which is a conventional manufacturing method. On the other hand, Comparative Example 2 was inferior in adhesiveness of the silicone release agent as a result of curing the coating film between the first and second coatings.
Next, in order to clarify the difference between Examples 1 and 2 and Comparative Example 1, the following Experimental Example 2 in which coating unevenness was intentionally formed was performed.
３．実験例２ 3. Experimental example 2
上記基材にアンダー層としてヘキセニル基タイプのシリコーン剥離剤を塗布した後、展色機のゴムロール表面に、異物として大きさ１〜２ｍｍの紙粉を０．４ｇ／ｍ２の割合で付着させ、この状態で、基材表面にさらにトップ層としてヘキセニル基タイプのシリコーン剥離剤を塗布したこと以外は、実施例１と全く同様にして剥離紙を作製した。
その後、粘着剤１、２を用い、実施例１と全く同様にしてサンプル片を得た。
After applying a hexenyl group type silicone release agent to the base material as an under layer, a paper powder having a size of 1 to 2 mm is adhered as a foreign matter to the rubber roll surface of the color developing machine at a rate of 0.4 g / m 2 . In this state, a release paper was prepared in exactly the same manner as in Example 1 except that a hexenyl group type silicone release agent was further applied to the substrate surface as a top layer.
Thereafter, sample pieces were obtained using adhesives 1 and 2 in exactly the same manner as in Example 1.
上記基材にアンダー層としてビニル基タイプのシリコーン剥離剤を塗布した後、予め展色機のゴムロール表面に、異物として大きさ１〜２ｍｍの紙粉を０．４ｇ／ｍ２の割合で付着させ、この状態で、基材表面にヘキセニル基タイプのシリコーン剥離剤を塗布したこと以外は、実施例２と全く同様にして剥離紙を作製した。
その後、粘着剤１、２を用い、実施例２と全く同様にしてサンプル片を得た。
After applying a vinyl group type silicone release agent as an under layer to the base material, paper powder having a size of 1 to 2 mm is adhered to the surface of the rubber roll of the color spreader at a rate of 0.4 g / m 2 in advance. In this state, a release paper was prepared in exactly the same manner as in Example 2 except that a hexenyl group type silicone release agent was applied to the surface of the substrate.
Thereafter, sample pieces were obtained using adhesives 1 and 2 in exactly the same manner as in Example 2.
比較例３
展色機のゴムロール表面に、予め異物として大きさ１〜２ｍｍの紙粉を０．４ｇ／ｍ２の割合で付着させ、この状態で、基材表面にヘキセニル基タイプのシリコーン剥離剤を１回のみ塗布したこと以外は、比較例１と全く同様にして剥離紙を作製した。
その後、粘着剤１、２を用い、比較例１と全く同様にしてサンプル片を得た。
得られた結果を表２に示す。
Comparative Example 3
A paper powder having a size of 1 to 2 mm is previously adhered as a foreign substance at a rate of 0.4 g / m 2 to the surface of the rubber roll of the color developing machine. In this state, a hexenyl group type silicone release agent is applied once to the surface of the base material. A release paper was prepared in exactly the same manner as Comparative Example 1 except that only the coating was applied.
Thereafter, sample pieces were obtained using adhesives 1 and 2 in exactly the same manner as in Comparative Example 1.
The obtained results are shown in Table 2.
表２から明らかなように、実施例３、４の場合、紙粉（異物）が塗工ロールに付着して（故意に塗工ムラが形成されて）いても重剥離は生じなかった。一方、比較例３の場合、重剥離が生じた。このことから、シリコーン剥離剤を２回以上に分けて塗布すると、重剥離を解消できることが判明した。 As is apparent from Table 2, in Examples 3 and 4, even when paper dust (foreign matter) adhered to the coating roll (deliberate coating unevenness was formed), no heavy peeling occurred. On the other hand, in the case of Comparative Example 3, heavy peeling occurred. From this, it was found that heavy peeling can be eliminated by applying the silicone release agent in two or more steps.
次に、実機での実験として、図１に示す塗工機を用い、上記実験例１，２と同様にして剥離紙を作製した。 Next, as an experiment using an actual machine, a release paper was prepared in the same manner as in the above Experimental Examples 1 and 2, using the coating machine shown in FIG.
４．実験例３ 4). Experimental example 3
上記塗工機を用い、上記と同様の基材に、まずアンダー層としてヘキセニル基タイプのシリコーン剥離剤（塗工量０．４ｇ／ｍ２）を塗布し、、次に該アンダー層がウェット状態のまま、その表面にさらにトップ層としてヘキセニル基タイプのシリコーン剥離剤（塗工量０．５ｇ／ｍ２）を塗布した。塗工速度は１００ｍ／分であり、塗布後の基材を１６０℃のオーブンに入れた。なお、この基材は、巻きの最初の位置から約１０００ｍ過ぎた位置を起点とし、ここから約１０ｍの間に大きさ１〜２ｍｍの紙粉を０．２ｇ／ｍ２の割合で異物として付着させ、全長約３０００ｍの剥離紙ロール（坪量７３ｇ／ｍ２のグラシン紙）である。
この剥離紙を２３℃で５０％ＲＨの環境下で２日間放置した。
次に、この放置後の剥離紙に上記実験例１で用いたのと同一の粘着剤１又は粘着剤２を同様な条件で塗布、乾燥させた。次に６４ｇ／ｍ２の上質紙を粘着剤塗布面に貼り合わせ、粘着シートと剥離紙の積層体を得た。得られた積層体をガラス板で挟み、約２５ｇ／ｃｍ２の加重を掛けて２３℃で１日間放置した。基材の巻きの最初の位置から約１２００ｍの位置、及び約３０００ｍの位置のサンプル片をそれぞれ得た。各サンプル片について、実験例１と同様にして剥離力及びシリコーン剥離剤の密着性を評価した。
得られた結果を表３に示す。
Using the coating machine, a hexenyl group type silicone release agent (coating amount 0.4 g / m 2 ) is first applied as an under layer to a substrate similar to the above, and then the under layer is wet. The hexenyl group type silicone release agent (coating amount 0.5 g / m 2 ) was further applied to the surface as a top layer. The coating speed was 100 m / min, and the substrate after coating was placed in an oven at 160 ° C. In addition, this base material starts from a position about 1000 m past the initial position of winding, and a paper powder having a size of 1 to 2 mm is adhered as a foreign substance at a rate of 0.2 g / m 2 between about 10 m from here. A release paper roll having a total length of about 3000 m (glassine paper having a basis weight of 73 g / m 2 ).
This release paper was left at 23 ° C. in an environment of 50% RH for 2 days.
Next, the same pressure-sensitive adhesive 1 or pressure-sensitive adhesive 2 as used in Experimental Example 1 was applied to the release paper after being left standing and dried under the same conditions. Next, 64 g / m 2 of high-quality paper was bonded to the pressure-sensitive adhesive coated surface to obtain a laminate of the pressure-sensitive adhesive sheet and release paper. The obtained laminate was sandwiched between glass plates and allowed to stand at 23 ° C. for 1 day under a load of about 25 g / cm 2 . Sample pieces at a position of about 1200 m and a position of about 3000 m were obtained from the initial position of the winding of the substrate. About each sample piece, it carried out similarly to Experimental example 1, and evaluated the peel force and the adhesiveness of the silicone release agent.
The obtained results are shown in Table 3.
表３から明らかなように、実施例５の場合、基材に異物が付着していても重剥離は生じなかった。また、シリコーン剥離剤の密着性も良好であった。 As is clear from Table 3, in the case of Example 5, heavy peeling did not occur even if foreign matter adhered to the substrate. Moreover, the adhesiveness of the silicone release agent was also good.
２ バックアップロール
１１ 塗工ロール
２１ 塗工ロール
３０ 基材
2 Backup roll 11 Coating roll 21 Coating roll 30 Base material
Claims (4)
A backup roll that supports the traveling substrate; a first coating roll that faces the backup roll and is coated on the substrate; and is spaced apart from the first coating roll and faces the backup roll A coating apparatus comprising: a second coating roll for coating on a substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003326158A JP4257840B2 (en) | 2003-09-18 | 2003-09-18 | Release paper manufacturing method and coating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003326158A JP4257840B2 (en) | 2003-09-18 | 2003-09-18 | Release paper manufacturing method and coating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005089914A true JP2005089914A (en) | 2005-04-07 |
| JP4257840B2 JP4257840B2 (en) | 2009-04-22 |
Family
ID=34456422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003326158A Expired - Lifetime JP4257840B2 (en) | 2003-09-18 | 2003-09-18 | Release paper manufacturing method and coating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4257840B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008248455A (en) * | 2007-03-30 | 2008-10-16 | Lintec Corp | Rolled release sheet and adhesive material |
| JP2010520052A (en) * | 2007-03-02 | 2010-06-10 | ブルースター・シリコーン・フランス・エスアエス | Manufacturing method of textile support and textile support |
| JP2014077859A (en) * | 2012-10-10 | 2014-05-01 | Kobayashi Create Co Ltd | Label sheet and method of producing label sheet |
-
2003
- 2003-09-18 JP JP2003326158A patent/JP4257840B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010520052A (en) * | 2007-03-02 | 2010-06-10 | ブルースター・シリコーン・フランス・エスアエス | Manufacturing method of textile support and textile support |
| JP2008248455A (en) * | 2007-03-30 | 2008-10-16 | Lintec Corp | Rolled release sheet and adhesive material |
| JP2014077859A (en) * | 2012-10-10 | 2014-05-01 | Kobayashi Create Co Ltd | Label sheet and method of producing label sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4257840B2 (en) | 2009-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5855465B2 (en) | Surface protective film, optical component on which it is adhered, and industrial product | |
| KR20000010761A (en) | Composite pressure sensitive adhesive | |
| JP4618761B2 (en) | Optical protective tape, optical protective tape processing layer forming agent, optical film with optical protective tape, image display device with optical protective tape | |
| TW201619320A (en) | Anisotropic adhesive sheet | |
| JPS6233635A (en) | Lacquer film and manufacture thereof | |
| KR100616401B1 (en) | Masking Film for Textured Surfaces | |
| JP2004223974A (en) | Optical protecting tape | |
| JP4257840B2 (en) | Release paper manufacturing method and coating apparatus | |
| JPH11300897A (en) | Release film for adhering sheet | |
| JP6400430B2 (en) | Curable composition for silicone coating layer and silicone coating sheet | |
| JP6204132B2 (en) | Release sheet and adhesive sheet | |
| JP4317827B2 (en) | High release silicone rubber roll and method for producing the same | |
| KR20160094309A (en) | Release film and manufacturing method of the release film | |
| JP2584918B2 (en) | Release sheet | |
| JP3574524B2 (en) | Method for producing adhesive film for protecting photomask | |
| JP4558688B2 (en) | Information recording adhesive sheet | |
| JP4900928B2 (en) | Method for removing uncured silicone from protective film | |
| CN209794767U (en) | silicone oil release film with reticulate pattern shape | |
| JP6476442B2 (en) | Industrial product with surface protective film and adherend adhesion film attached | |
| JP2017101095A (en) | Repeelable heat resistant absorption sheet | |
| JP6130476B2 (en) | Adherent adhesion film, optical component on which it is adhered, and industrial product | |
| JP6677812B2 (en) | Pressure sensitive adhesive sheet | |
| JP6521538B2 (en) | Anisotropic adhesive sheet | |
| JP2020019160A (en) | Hand-tearable adsorption tape | |
| JP4493971B2 (en) | Method for producing releasable adhesive label |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060605 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20081016 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20081024 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20081215 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20090130 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20090130 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4257840 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120213 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120213 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20170213 Year of fee payment: 8 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |