JP2006276280A - Microsucker label and manufacturing method of microsucker label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microsucker label which satisfactorily adheres to even an object having ruggedness. <P>SOLUTION: A microsucker label 10 comprises a support 12, a flexible microsucker layer which has numerous recessed dents having diameters larger than 0 μm and equal to or smaller than 300 μm and has a thickness of larger than 0 μm and equal to or smaller than 300 μm, and a peelable member 16 on the surface of the microsucker layer, for protecting the microsucker layer, wherein the microsucker layer is made of a low-elasticity material. Since the microsucker layer is made of the low-elasticity material, an elastic restoration force of the microsucker layer is reduced to weaken a conventionally expected sucking action caused by the elastic restoration force resulting from pressing the microsucker layer, however the microsucker label satisfactorily adheres to the object in spite of of ruggedness of the object because the microsucker layer can follow the ruggedness. As a result, the microsucker layer has a higher adhesive force than microsucker layers made of conventional elastic materials. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a micro sucker label that can be attached to an adherend by using the suction force of the micro sucker and a method for producing the micro sucker label.

  Conventionally, this type of micro sucker label has been known as disclosed in Patent Document 1 to Patent Document 11, and usually has a three-layer structure composed of a support, a micro sucker layer, and a release material coated with a release agent. I am making a body. The structure of the micro sucker label is similar to the structure of the pressure sensitive adhesive label using the adhesive, but the micro sucker layer can generate an adsorbing force on the adherend instead of the adhesive. In contrast, although there is a restriction that the adherend needs to be a smooth surface, it has re-peelability that can be repeatedly applied and peeled off, and no adhesive remains on the adherend even if peeled off. have.

  In the present invention, the micro sucker layer refers to a flexible adsorptive foamed layer having an infinite number of concave recessed holes having a diameter greater than 0 μm and not greater than 300 μm, and having a thickness greater than 0 μm and not greater than 300 μm. A foam stabilizer, a thickener, a foaming agent, a curing agent, and a pigment are mixed in the copolymer emulsion liquid at a certain ratio, and pressurized air is sent through a mechanical foaming machine "Oaks mixer" to expand the foaming ratio. (Numerical value obtained by dividing the weight per unit volume before foaming by the weight per unit volume after foaming) Foam emulsion liquid (resin of resin) that physically generated innumerable fine bubbles by 1.2 times to 3 times The solid content is 40 to 55% by weight) on a polyester film as a support having a smooth surface with a comma coater and dried.

The infinite number of fine concave depressions in the micro sucker layer are continuous with internal bubbles having a diameter larger than the diameter, and the internal bubbles have a structure continuous with other bubbles in a small diameter tube. The concave depression hole on the surface of the micro suction cup layer is not necessarily a perfect circle, and the major axis of the concave depression hole is 300 μm or less (mainly 100 μm or less). Although it depends on the magnification, usually 1 to 90,000 pieces / cm ² are formed per unit area.

  The adsorption force of the micro sucker layer is generated by this fine and flexible concave depression hole. When the concave depression hole is pressed onto the non-breathable adherend surface, it is formed by the concave depression hole and the adherend surface. This is a suction force generated when the sealed space is in a reduced pressure state. According to Patent Document 4, the expression mechanism of adhesion to the smooth surface of the foam sheet (micro sucker layer) is not due to the affinity or chemical bonding of the base material, nor is it due to adhesiveness. According to Patent Document 2, Patent Document 11 and the like, when the foamed synthetic resin layer (that is, the micro sucker layer) is pressed against the adherend, the foamed synthetic resin layer is in an elastically compressed state by this pressing, and this is about to be restored elastically. Furthermore, it is said that the sucker action by the concave depression hole works.

  For this reason, conventionally, it has been considered essential that the micro sucker layer has elasticity. In addition, in order to exert the above suction cup action, the adherend needs to be a smooth surface. Therefore, the conventional micro sucker label has a drawback that the adsorptive power to the uneven adherend is weak.

  By the way, as described above, as a manufacturing method of the micro sucker label, it is formed by directly applying a foamy emulsion liquid to a surface smooth support with a comma coater and then evaporating and drying the moisture at 100 ° C. to 140 ° C. Thus, a method for producing a foamed sheet having a thickness of 50 to 300 μm has been put into practical use. This method is called the “direct method” because the foamed emulsion liquid is directly applied to the support as shown in FIG. 5, and the release material is coated on the surface of the micro sucker when leaving the drying furnace. The sucker label is wound into a roll and manufactured.

  On the other hand, in the case of a conventional pressure-sensitive adhesive label, the pressure-sensitive adhesive is directly applied onto the peeled product (with a release agent applied), and after the solvent or moisture contained in the pressure-sensitive adhesive is dried in a drying furnace, A pressure-sensitive adhesive having a thickness of 20 μm to 35 μm is produced by being bonded to a support when wound out of the drying furnace, wound up in a roll, and cut into leaves. Since the adhesive does not adhere to the peeled material to which the release agent is applied, it is transferred and adhered to the support when it is attached to the support, and the adhesive remains attached to the support even if the peeled material is peeled off. Therefore, this method is called “transfer method”.

  When this "transfer method" is to be applied to a micro sucker label, the foamed emulsion produced by the conventional method is applied directly on the peeled material, dried, and then peeled off even if it is bonded to a support. The micro sucker formed on the object has a drawback that it is not transferred to the support. Therefore, in Patent Document 8, a double-sided release process paper is attached to the back surface of a micro sucker sheet formed by coating an acrylic ester copolymer emulsion liquid on a double-sided release process paper made of polyester film or the like and drying it. A manufacturing method is proposed in which a printed sheet is laminated and adhered via an adhesive without any change. However, since such a manufacturing method requires the use of an adhesive, when the micro sucker label manufactured in this way is used in a copying machine or a laser printer to be printed after manufacturing, the adhesive is caused by high heat in the machine. Has a problem that it is softened and protrudes to contaminate the fixing roll and the photosensitive drum.

  Therefore, the present situation is that the micro sucker label is produced only by the direct method of coating directly on the support. And, the support used in the case of producing by the direct method is required to have three elements: water resistance, heat resistance, and good adhesion to an emulsion liquid such as an acrylate copolymer. .

  A polyester film is known as a material that satisfies this essential condition. Although a polyester film as a support has been put into practical use, it supports a support made of other materials, such as paper. Production examples in which a foam emulsion liquid is applied as a body are not shown in the patent literature and have not been put into practical use. Experimentally, even though it is possible to apply the emulsion liquid directly to paper, the current situation is that the water of the emulsion liquid causes the paper to run out and wrinkle, and industrial production is impossible.

JP 2000-52465 A JP-A-9-109361 Japanese Utility Model Publication No. 5-013732 Japanese Patent Laid-Open No. 1-259043 JP 2004-174918 A Japanese Patent No. 3327737 Japanese Patent Laid-Open No. 9-267547 JP 2002-348548 A JP 2001-356724 A JP 2004-38119 A JP 2003-330373 A

As described above, the conventional micro sucker label has the following problems.
・ A conventional micro sucker label can be adsorbed to any adherend as long as the adherend is a smooth surface.
-Since conventional micro sucker labels can be put into practical use only by the direct manufacturing method, there is a great limitation in the selection of the material for the support.

  As a result of diligent research, the present inventor has found that such problems can be solved by suppressing the elastic force of the micro sucker layer, and has achieved the present invention. That is, the present invention provides a support, a flexible micro sucker layer having an infinite number of concave recessed holes with a diameter of greater than 0 μm and less than or equal to 300 μm, a thickness of greater than 0 μm and less than or equal to 300 μm, and a release that protects the surface of the micro sucker layer In the micro sucker label, the micro sucker layer is made of a low elastic material whose elastic recovery ratio shows 70% to 95% after 10 minutes of pressure release.

  The present inventor makes the micro sucker layer low in elasticity so that even if the adherend is uneven, the micro sucker layer can follow the unevenness. It has been found that the adhesion is good and as a result, the adsorptive power increases. If the micro sucker layer is made of a low elastic material, the elastic restoring force of the micro sucker layer will be reduced, and it will be generated by the elastic restoring force when the micro sucker layer is pressed against the adherend. Although the suction cup action is considered to decrease, it is considered that the degree of adhesion to the adherend contributes to the overall adsorption force more than the reduction of the suction cup action. Thus, a novel micro sucker label can be provided by making the micro sucker layer have low elasticity with the idea of reversing the conventional method.

In the present invention, the decrease in the elastic restoring force of the micro sucker layer is expressed as a restoration ratio. As shown in FIG. 4, the restoration ratio is 60% of the initial thickness by applying pressure perpendicular to the micro sucker layer. was compressed to below, is defined as the ratio of the thickness d restored to the thickness d ₀ of the previous pressure applied in the pressure release 10 minutes after (d / d _0). The restoration ratio shows a value larger than 95% in the conventional micro sucker layer, but the micro sucker layer used in the present invention is 70 to 95%, preferably 70 to 90% or less, more preferably 70 to 80%. Show.

  In this manner, the micro sucker label that can be applied only to a smooth adherend such as a conventional glass surface can be applied to any wall surface.

  Arbitrary means can be applied as means for making the micro sucker layer have low elasticity. One means is to add a plasticizer into the micro sucker layer. As content of a plasticizer, it is good to mix | blend more than content which may be contained in the trace amount in the material which comprises the conventional micro sucker layer. Specifically, it is good to make it contain 4 to 40 weight% (it contains 2 to 20 weight% in the state before drying) in the dried micro sucker layer.

  The plasticizer is preferably a water-soluble plasticizer, specifically, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, di-2-ethylhexyl phthalate, di-normal octyl phthalate, diisononyl phthalate, dinonyl phthalate, Phthalate esters such as diisodecyl phthalate and butyl benzyl phthalate, dioctyl adipate, diisononyl adipate, dinormal alkyl adipate, dialkyl adipate, dioctyl azelate, dibutyl sebacate, dioctyl sebacate, tricresyl phosphate, acetyl citrate Examples include tributyl acid, epoxyized soybean oil, trioctyl trimellitic acid, polyester series, and chlorinated paraffin.

  Alternatively, as a means for making the other micro sucker layers have low elasticity, a plasticizer can be included in the support. Since the plasticizer moves from the support to the micro sucker layer with the passage of time, as a result, the micro sucker layer contains the plasticizer. In this case, when the plasticizer is a low molecular plasticizer, good migration to the micro suction layer can be obtained.

  As described above, by making the micro sucker layer have low elasticity and improving the adhesion to the member, it is possible to realize a manufacturing method by the “transfer method”, which has been impossible in the conventional manufacturing of the micro sucker label. That is, the method for producing a micro sucker label according to the present invention includes a step of applying a water-soluble foam emulsion liquid containing a synthetic resin emulsion liquid on a peeled material and then drying to form a micro sucker layer. And a step of coating a support on the surface of the micro sucker layer on the side opposite to the surface on which the exfoliated material is present.

  Since the low elasticity micro sucker layer according to the present invention also increases the adsorptive power to the support, the micro sucker layer can be integrated with the support by coating the support after forming the micro sucker layer. When adhering to the adherend, the possibility of peeling from the support can be reduced.

  In order to obtain a low-elasticity micro sucker layer, a plasticizer can be contained in the water-soluble foam emulsion liquid, and preferably the plasticizer is contained in an amount of 2 to 20% by weight in the water-soluble foam emulsion liquid. It is good to. Alternatively, a step of using a plasticizer as a support and coating the support on the surface of the micro sucker layer and then transferring the plasticizer can be included. The content of the plasticizer contained in the support is preferably 4 to 40% by weight in the support, and excellent migration is exhibited when the low-molecular plasticizer is used.

  In the present invention, since the micro sucker label can be manufactured by the transfer method, there is no limitation on the material of the support as compared with the case of manufacturing by the direct method. Therefore, the support can be made of a non-heat resistant or non-water resistant material. For example, non-heat-resistant and non-water-resistant paper such as printing media, high-quality paper, coated paper, ink-jet paper, color laser paper, craft paper, etc., non-heat-resistant such as vinyl chloride film and urethane film The resin film can be used as a support. In addition, as for the thickness, a thin support having a thickness of 30 μm or less can be used.

  A release agent is applied to the surface of the exfoliated material in advance, and a micro sucker layer may be formed on the surface on which the exfoliant is applied, thereby forming a micro sucker layer on the exfoliated product. When the label is used for the adherend, the peeled material can be easily peeled off from the micro sucker layer.

  As described above, according to the present invention, even on an uneven adherend, since the micro sucker layer can follow the unevenness, the adsorptivity of the micro sucker label to the uneven adherend is improved. be able to.

  Since the micro sucker label can be manufactured by a manufacturing method based on the transfer method, a great degree of freedom can be given to the selection of the material of the support.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an enlarged sectional view of a micro sucker label according to the present invention. In the figure, a micro sucker label 10 includes a support 12, a flexible micro sucker layer 14 having a countless number of recessed depressions having a diameter of 300 μm or less and a thickness of 300 μm or less, and a peeled material 16 that protects the surface of the micro sucker layer 14. And having. The micro sucker layer 14 is made of a low elastic material and exhibits low elasticity. Optionally, a release agent is applied to the surface of the peeled material 16 facing the micro sucker layer 14.

  FIG. 2 is a schematic explanatory view showing a manufacturing method of the micro sucker label. In the figure, 22 is a peeled material roll, 24 is a foaming machine, 26 is a comma coater, 28 is a drying furnace, 30 is a support roll, 32 is a laminating roll, and 34 is a micro sucker label roll.

  In the foaming machine 24, the mixture constituting the low-elasticity material for the micro sucker layer is foamed to become a foamy emulsion liquid, which is coated on the sheet-like release material 16 fed from the release material roll 22 by the comma coater 26. Is done. Next, when this is dried for a predetermined time in the drying furnace 28, the micro sucker layer 14 is formed on the peeled material 16. The formed micro sucker layer 14 is coated with the support 12 fed from the support roll 30 by the bonding roll 32 and wound around the micro sucker label roll 34. Thus, the micro sucker layer 14 is transferred to the support 12. As shown in FIGS. 3A and 3B, the micro sucker layer 14 is microscopically attached to the support 12 having the uneven surface and the mat surface by the bonding roll 32. The sucker layer 14 is sucked and transferred so as to bite into the uneven surface of the support 12. Since the micro sucker layer 14 is made of a low elastic material, the close contact state shown in FIG. 1 can be maintained. Thereby, a sufficient contact area with the support 12 can be ensured, and the integrity of the support 12 and the micro suction layer 14 can be maintained by the adsorption force in the contact area. Of course, even when the support 12 is smooth, it can have good adhesion.

  On the other hand, when the elasticity is high like the conventional micro sucker layer, the micro sucker layer returns to the state shown in FIG. 3 (B) by its restoring force, and the contact area with the support decreases. Therefore, it does not adsorb to the support, or even if it is adsorbed, the adsorbing power is low and the film is peeled off.

  When the micro sucker label 10 manufactured as described above is used, first, the peeled material 16 is peeled off and the micro sucker layer 14 is pressed against the adherend. Even when the adherend is an uneven surface or a matte surface, the micro sucker layer 14 is adsorbed so as to bite into the uneven surface with respect to the adherend, and in order to maintain the bitten state, A sufficient contact area can be secured and high adsorption power can be exhibited.

  The first method for reducing the elasticity of the micro sucker layer 14 is a method of mixing a plasticizer into an emulsion liquid as shown in the following example.

  1000 g of acrylic ester copolymer DICNAL (trade name of Dainippon Chemical Industry) MFP-20, 40 g of foaming agent DICNAL M-20, 40 g of foam stabilizer DICNAL M-40, 10 g of thickener DICNAL MX, Mixing 0% by weight, 5%, 10% and 20% of the water-soluble plasticizer triacetin (manufactured by Daihachi Chemical Co., Ltd.) and the water-soluble plasticizer TEP in the acrylic ester copolymer emulsion liquid consisting of 20 g of the crosslinking agent DICNAL GX Then, a micro sucker layer having a thickness of 150 μm was prepared using a foam acrylic emulsion adjusted to a foaming ratio of 2 times. Next, this was pressurized to a thickness of 90 μm by applying a constant pressure, the pressure was released, and the thickness ΔE returned after 10 minutes was taken as the elastic return amount, and the elastic return amount was measured. It shows that elasticity is lose | disappearing, so that the value of (DELTA) E is small. And the restoration | restoration ratio with respect to the initial thickness of 150 micrometers was calculated | required.

  In addition, the adsorptive power was measured. The adsorptive power was determined by measuring the adsorptive power with respect to ground glass having a fine irregular surface immediately after pasting and 2 months after pasting.

  Next, a micro sucker layer having a thickness of 100 μm is formed on a polyester film having a thickness of 75 μm, and a micro sucker label using a 50 μm thick polyester film as a release product is used to adhere the micro sucker layer to various materials that can be used as a support. I examined the degree. Candidates for the support are high-quality paper with no smoothness and air permeability (Beck smoothness 100 seconds), mat-like coated paper POD mat coated paper with no air permeability and fine uneven surface (80 seconds, made by Oji Paper) Then, the adsorptive power of the micro-sucking layer with high smoothness POD gloss coated paper (500 seconds, Oji Paper), aluminum foil, urethane film, polyethylene film with no triacetin added and 5% triacetin added thereto was measured. The measurement results are shown in the following table.

  From the above measurement results, it can be seen that by adding a plasticizer, elasticity is reduced and adsorption force is increased. The increase mechanism is considered to be due to the size of the contact area of the micro sucker layer 14 to the support 12 as shown in FIG.

  The second method for reducing the elasticity of the micro sucker layer 14 described above is to add a plasticizer in advance to the support 12 to which the micro sucker layer 14 is transferred, or select a support containing the plasticizer. It is a method of doing. This can obtain the same effect as the first method by transferring the plasticizer contained in the support 12 into the micro suction layer 14 over time.

  In the case of a phthalate ester widely used as a plasticizer in a soft vinyl chloride film, the migration of the plasticizer proceeds relatively early and is completed within one month, whereas in the case of a polymer plasticizer, the migration rate is slow. Therefore, it is preferable to use a low molecular plasticizer.

  Immediately after attaching a micro sucker layer of 75 μm to a 0.39 mm thick tent tarpaulin vinyl chloride sheet (manufactured by Hiraoka Textile Co., Ltd.) containing 35% by weight of a low molecular plasticizer phthalate, and 1 month Later, the results of measuring the peel strength at which the micro sucker layer peels from the tent tarpaulin vinyl chloride sheet are shown in the following table.

  From the above table, it can be seen that the plasticizer of the tent tarpaulin vinyl chloride sheet was transferred to the micro sucker layer after one month, and the adsorptivity between the micro sucker layer and the tent tar tar porin vinyl chloride sheet was increased.

  In addition, a micro sucker label in which a tent tarpaulin vinyl chloride sheet (manufactured by Hiraoka Textile Co., Ltd.) as the same support is coated on a micro sucker layer is sandwiched between the measurement parts of the thickness gauge with the peeled material peeled off, and the thickness is measured. As a result of measurement, it was 465 μm. On the other hand, a constant pressure was applied to the thickness meter with the micro sucker label being sandwiched, and the pressure was increased to a thickness of 432 μm. Then, the pressure was released, the thickness returned by the elasticity of the micro sucker layer after 10 minutes was measured, and the difference ΔE between this thickness and 432 μm was taken as the elastic return amount. A smaller value of ΔE indicates that the elasticity is reduced. Further, the support had a recovery rate of 100%, and the thickness was hardly changed before and after the pressure application, and the recovery rate with respect to the initial thickness of 75 μm was determined for the micro suction layer excluding the support.

また、微細な凹凸面を有するスリガラスに対する吸着力を測定した。測定した結果を以下の表に示す。

Moreover, the adsorption power with respect to the ground glass which has a fine uneven surface was measured. The measurement results are shown in the following table.

以上の結果から可塑剤移行の効果により、弾性が低減されて吸着力が増大することが分かる。

From the above results, it can be seen that due to the effect of plasticizer transfer, elasticity is reduced and adsorption force is increased.

(Example 1) Plasticizer transfer method 100 kg of acrylic ester copolymer DICNAL (trade name of Dainippon Chemical Industry) MFP-20, 4 kg of foaming agent DICNAL M-20, 4 kg of foam stabilizer DICNAL M-40 Then, 1 kg of the thickener DICNAL MX, 2 kg of the crosslinking agent DICNAL GX, and 5 kg of the water-soluble plasticizer triacetin (manufactured by Daihachi Chemical) are mixed, and the viscosity is adjusted to 5000 cps with 25% aqueous ammonia. A continuous foaming machine Oaks mixer (manufactured by Stoke) is mixed with air to prepare a foam acrylic emulsion having a foaming ratio of 2.0 times. Next, a 50 μm-thick polyester film (Iim Co., Ltd. product surface electrical resistance value 1 × 10 ¹² Ω) that is an exfoliated material on one side and a 1 μm-thick release agent on the opposite surface The above-mentioned foam acrylic emulsion 280 g / m ² was coated on a silicone resin surface of a polyester film that had been pre-coated with silicone resin (Tore Silicone Product SRX357) using a comma coater, and 110 to 140 ° C. in a drying oven. For about 7 minutes, about 140 g / m ² of water is blown off, and the surface of the produced micro sucker layer with a thickness of 200 μm is coated with POD 100 gloss coat (100 g / m) as the support at the exit of the drying furnace. ⁽²⁾ Oji Paper Products Beck Smoothness 700 seconds) Wrapped around a paper tube to produce 1210 mm wide x 300 m. Thereafter, the product was cut into A4 to obtain 2000 A4 size micro sucker labels. The micro sucker label cut to A4 has no curling and no curling, and the total thickness is 210 μm. When the surface of the micro sucker layer is observed with a magnifying glass, there are about 7 concave concave holes with a diameter of 5 to 100 μm. More than 10 thousand / cm ² were formed.

(Comparative Example 1) Non-plasticizer transfer method 1000 g of acrylate copolymer DICNAL (trade name of Dainippon Chemical) without adding water-soluble plasticizer triacetin, and 40 g of foaming agent DICNAL M-20 40 g of the foam stabilizer DICNAL M-40, 10 g of the thickener DICNAL MX, and 20 g of the crosslinking agent DICNAL GX are mixed, and the viscosity is adjusted to 5000 cps with 25% aqueous ammonia. This is mixed with air using a food stirrer (KSM 90WW manufactured by KitchenenAid) to prepare a foam acrylic emulsion having a foaming ratio of 2.0 times. Next, a 50 μm-thick polyester film (Iim Co., Ltd. product surface electrical resistance value 1 × 10 ¹² Ω) that is an exfoliated material on one side and a 1 μm-thick release agent on the opposite surface (Tore Silicone Product SRX357) was coated on the silicone resin surface of the polyester film that had been pre-coated with silicone and the foamed acrylic emulsion 250 g / m ² by wet coating by hand using a laboratory comma coater. After drying for 7 minutes at 140 ° C. in a drying oven, the surface of the 200 μm-thick micro-suction layer is coated with color laser coated paper POD 100 gloss coat (100 g / m ² Oji paper product Beck smoothness 700 seconds) Was coated to prepare a micro sucker label. When the surface of the micro suction cup layer was observed with a magnifying glass, a fine concave depression with a diameter of 10 to 150 μm was observed.
The adsorption force between the coated paper POD100 gloss coated surface and the micro sucker layer was weak, and the micro sucker layer was easily peeled off from the coated paper POD100 gloss coated surface.

(Comparative example 2) Non-plasticizer direct method Acrylic ester copolymer DICNAL (trade name of Dainippon Chemical Industry) 1000 g of MFP-20, 40 g of foaming agent DICNAL M-20, and foam stabilizer DICNAL M-40 40 g, 10 g of the thickener DICNAL MX and 20 g of the crosslinker DICNAL GX are mixed, and the viscosity is adjusted to 5000 cps with 25% aqueous ammonia. This was mixed with air using a food stirrer (KSM 90WW manufactured by KitchenenAid) to prepare a foam acrylic emulsion having a foaming ratio of 2.0. Next, 250 g / m ² of the above foam acrylic emulsion was wet coated on a POD 100 gloss coat (100 g / m ² Oji Paper product) as a support with a test comma coater and dried at 140 ° C. for 7 minutes in a drying furnace. Thus, a micro sucker layer having a thickness of 200 μm was formed. After drying, the coated paper on which the micro sucker layer was formed had a large wave and abrupt occurrence, but a 50 μm polyester film that had been pre-coated with a 1 μm-thick silicone resin (Tore Silicone product SRX357) and silicone-treated. (Imm Co., Ltd. product surface electric resistance value 1 × 10 ¹² Ω) was coated so as to be in contact with the micro sucker layer to prepare a micro sucker label. The product was severely wrinkled and rampaged, but when observing the surface of the micro sucker layer with a magnifying glass, about 50,000 or more pits / cm ² having a diameter of 10 to 100 μm were formed.

Adsorption power measurement 1
Color laser coated paper (POD100 matte coat Beck smoothness made by Oji Paper Co., Ltd.) as an adherend having an uneven surface is pressure-bonded to the surface of each micro sucker layer of Example 1 and Comparative Examples 1 and 2 and adsorbed. The force was measured. Measurement conditions are as follows: a micro suction cup is pressure-bonded to a mat coat surface with a 5 kg roller for 10 minutes, and then peeled off at an angle of 180 degrees at a speed of 300 mm / minute, and the tensile strength at that time is defined as an adsorption force. The results are shown in the following table.

実施例１は比較例に比較して、凹凸の被着体に対して高い密着力を示すことがわかった。

It turned out that Example 1 shows high adhesive force with respect to the uneven | corrugated adherend compared with a comparative example.

Adsorption power measurement 2
For Example 1 and Comparative Example 2, the initial adsorption force on various adherends having smooth surfaces and uneven surfaces and the adsorption force (unit N / 25 mm) after 7 days of pasting were measured at an angle of 180 degrees and a speed of 300 mm / It was measured as the force when peeled off in minutes. The results are shown in the following table.

実施例１は比較例２に比較して平滑面及び凹凸面のいずれに対しても大きな吸着力を示した。また、いずれの場合にも、ミクロ吸盤層が被着体を汚染する所謂糊残りの発生もなかった。

In comparison with Comparative Example 2, Example 1 showed a large adsorption force on both the smooth surface and the uneven surface. Further, in any case, there was no generation of so-called adhesive residue in which the micro sucker layer contaminates the adherend.

Elastic Test Example 1 and Comparative Example 2 each have a cylindrical weight (100 g) placed on the surface of the 200 μm micro sucker layer to dent the micro sucker layer surface, and the cylindrical weight is opened to remove the dent due to elasticity. The time to return to the layer surface was measured and used as a measure of the elastic value. In Comparative Example 2, it returned to the original micro sucker layer surface in 0.5 minutes, whereas Example 1 was as long as 20 minutes. In Example 1, it was confirmed that the elastic force disappeared.

  Furthermore, when the micro sucker layer surface of Example 1 and Comparative Example 2 was pressed with the index finger and released by releasing the finger, a fingerprint mark remained on the micro sucker layer surface, but the time until the fingerprint disappeared was measured. While Comparative Example 2 was 0.5 minutes, Example 1 was 2 hours or longer. These phenomena are also considered to show the loss of elasticity of the micro sucker layer by the addition of the plasticizer.

(Example 2) Plasticizer transfer transfer method Implemented except that it was changed to a 50 μm-thick vinyl chloride film (bando chemical product WH28628) containing 28% by weight of plasticizer as a support, and a foam acrylic emulsion containing no plasticizer was used. A micro sucker label was prepared in the same procedure as in Example 1. Adsorption of the micro sucker layer to the vinyl chloride film as a support was high, and there was no curling or curling, and a 1000 mm width x 245 m could be manufactured by winding a micro sucker label with a total thickness of 180 μm around a 3 inch paper tube. . When the surface of the micro suction cup was observed with a magnifying glass, about 100,000 / cm ² or more of fine recessed depressions with a diameter of 5 to 100 μm were formed.

Comparative Example 3 Direct Method According to the same procedure as in Example 1, 250 g / m ² of a foam acrylic emulsion was tested on a 50 μm-thick vinyl chloride film (bando chemical product WH28628) containing 28% by weight of a plasticizer as a support. When coated with a comma coater for 300 mm in width and 400 mm in length and placed in a drying oven at 100 ° C. for 7 minutes, the 50 μm-thick vinyl chloride film is softened and shrunk, causing wrinkles and rampage. It became clear that it was not possible. It was found that when a support having no heat resistance was used, it could not be produced by the direct method.

Measurement of Adhesive Strength of Support Body The polyester film as a peeled material was peeled from the micro sucker labels of Example 2 and Comparative Example 3, and the adsorptivity of the micro sucker layer to the support was measured. The adsorptive power was defined as the adhesive strength obtained by attaching the adhesive tape to the surface of the micro suction layer and peeling the adhesive tape at an angle of 180 degrees at a speed of 300 mm / min after 10 minutes. The results are shown in the following table.

  When the foam emulsion is applied directly to the support as in Comparative Example 3, the adhesion between the support and the micro sucker layer is naturally high, and breakage occurs between the micro sucker layers, making measurement impossible. It was. However, the support adsorptive power in Example 2 was at a level with no practical problem. In practice, 3N / 25 mm or more is considered sufficient.

Regarding the adsorption force measurement example 2, the initial adsorption force on various adherends and the adsorption force (unit N / 25 mm) after 7 days of pasting were measured at a speed of 300 mm / min at an angle of 180 degrees. Measured as force. The results are shown in the following table.

(Example 3)
In the foam acrylic emulsion prepared in Example 1, a foam acrylic emulsion containing 5 kg of water-soluble plasticizer TEP (manufactured by Daihachi Chemical) was prepared instead of 5 kg of water-soluble plasticizer triacetin (manufactured by Daihachi Chemical). did. Next, a 50 μm-thick polyester film (Iim Co., Ltd. product surface electrical resistance value 1 × 10 ¹² Ω) that is an exfoliated material on one side and a 1 μm-thick release agent on the opposite surface produced by coating at (Toray silicone products SRX357) a comma coater foam acrylic emulsion 200 g / m ² is pre-coated on the silicone resin surface of siliconized polyester film at a wet, dried in a drying oven A micro-sucker label (total sucker layer) with the micro-sucker layer transferred onto the surface of the 100-μm-thick micro-sucker layer coated with a 85 μm-thick polyester film for color laser (Nisshinbo product SETY85) as a support at the exit of the drying furnace A thickness of 230 μm) was wound around a 6-inch paper tube to produce 1000 mm width × 244 m. Observation of the microstructure sucker layer surface fine concave sinkhole diameter 50~300μm was formed about 50,000 / cm ² or more at a magnifying glass.

(Comparative Example 4)
Except that the water-soluble plasticizer TEP was not added, it was coated with an experimental comma coater in the same manner as in Example 3 to prepare a micro sucker label having the same configuration.

Measurement of Adhesive Strength of Support Body The polyester film as the peeled material was peeled off from the respective micro sucker labels of Example 3 and Comparative Example 4, and the adsorptivity of the micro sucker layer to the polyester film as the support body was measured. The adsorptive power was defined as the peel strength obtained by attaching an adhesive tape to the surface of the micro suction cup layer and peeling the adhesive tape at an angle of 180 degrees at a speed of 300 mm / min after 10 minutes. The results are shown in the following table.

実施例３は比較例に比較して高い吸着性を示した。

Example 3 showed higher adsorptivity than the comparative example.

Adsorption force measurement For Example 3 and Comparative Example 4, the initial adsorption force on various adherends and the adsorption force (unit: N / 25 mm) after 7 days of application were peeled off at an angle of 180 degrees and a speed of 300 mm / min. The force was measured as The results are shown in the following table.

実施例３は比較例４に比較して平滑面及び凹凸面のいずれに対しても大きな吸着力を示した。

In Example 3, compared with Comparative Example 4, both the smooth surface and the uneven surface showed a large adsorption force.

Elastic test Example 3 and Comparative Example 4 each have a cylindrical weight (100 g) placed on the surface of the 100 μm micro sucker layer to dent the micro sucker layer surface, and the cylindrical weight is opened to remove the dent due to elasticity, and the original micro sucker The time to return to the layer surface was measured and used as a measure of the elastic value. In Comparative Example 4, it returned to the original micro sucker layer surface in 0.2 minutes, whereas in Example 3, it was as long as 32 minutes, and in Example 3, it was confirmed that the elastic force disappeared.

  Furthermore, when the micro sucker layer surface of Example 3 and Comparative Example 4 was pressed with an index finger and released by releasing the finger, the trace of the fingerprint remained on the micro sucker layer surface, but the time until the fingerprint disappeared was measured. While Comparative Example 4 was 0.4 minutes, Example 3 was 2 hours or longer. These phenomena are also considered to show the loss of elasticity of the micro sucker layer by the addition of the plasticizer.

It is an expanded sectional view of the micro suction cup label by this invention. It is a schematic explanatory drawing which shows the manufacturing method of the micro suction cup label by this invention. (A) And (B) is an expanded sectional view showing the state before a transfer of a micro sucker layer to a support by a manufacturing method of a micro sucker label according to the present invention. It is explanatory drawing showing the measuring method of a restoration ratio. It is a schematic explanatory drawing which shows the manufacturing method of the conventional micro sucker label.

Explanation of symbols

10 Micro sucker label 12 Support 14 Micro sucker layer 16

Claims (11)

A micro sucker label comprising a support, a micro sucker layer having an infinite number of concave recessed holes having a diameter greater than 0 μm and less than or equal to 300 μm, a thickness greater than 0 μm and less than or equal to 300 μm, and a release material that protects the surface of the micro sucker layer In
The micro sucker layer has an elastic recovery ratio of 70% to 95% after 10 minutes of pressure release (provided that the “recovery ratio” is 60% or less of the initial thickness by applying pressure perpendicular to the micro sucker layer. A micro sucker label comprising a low elastic material indicating a ratio of a restored thickness to an initial thickness after compression and pressure release.   The micro sucker label according to claim 1, wherein the micro sucker layer contains a plasticizer.   The micro sucker label according to claim 2, wherein the micro sucker layer contains 4 to 40 wt% of a plasticizer.   The micro sucker label according to claim 1, wherein the support contains a plasticizer. It is a manufacturing method of the micro sucker label according to any one of claims 1 to 4,
A step of applying a water-soluble foam emulsion liquid containing a synthetic resin emulsion liquid on the peeled material, followed by drying to form a micro sucker layer;
Coating the support on the surface of the micro sucker layer opposite to the surface on which the exfoliation is present;
A method for producing a micro sucker label having   The method for producing a micro sucker label according to claim 5, wherein the water-soluble foam emulsion liquid contains a plasticizer.   The method for producing a micro sucker label according to claim 6, wherein the water-soluble foam emulsion contains 2 to 20% by weight of a plasticizer in the water-soluble foam emulsion. As the support, a material containing a plasticizer is used,
After the step of coating the support, the step of transferring the plasticizer in the support to the micro sucker layer;
The method for producing a micro sucker label according to claim 5, further comprising:   The method of manufacturing a micro sucker label according to any one of claims 5 to 8, wherein the support is made of a non-heat-resistant or non-water-resistant material.   The method of manufacturing a micro sucker label according to any one of claims 5 to 9, wherein the support has a thickness greater than 0 µm and not greater than 30 µm.   11. The release material according to claim 5, wherein a release agent is applied to the surface of the release product in advance, and a micro sucker layer is formed on the surface to which the release agent is applied. Manufacturing method of micro sucker label.

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