JP4764946B2 - Cleaning adhesive tape roll - Google Patents

Description

  The present invention relates to a cleaning adhesive tape roll that captures dust on an adhesive surface, and more specifically, relates to a cleaning adhesive tape roll having stable cleaning properties from the beginning to the end of use.

  An adhesive tape roll for cleaning consists of an adhesive tape with an adhesive surface formed on one side, wound in multiple layers so that the adhesive surface faces the front side. It is a type of cleaning tool that catches dust on the surface to be cleaned by rolling it while bringing the adhesive surface into contact with the surface to be cleaned such as a surface.

  An adhesive layer that captures dust is formed on the adhesive surface. The pressure-sensitive adhesive layer is formed by a method such as solid coating for forming the pressure-sensitive adhesive layer on almost the entire surface of the base material or stripe coating for forming a large number of stripes along the feeding direction of the pressure-sensitive adhesive tape. Usually, as shown in Patent Document 1, for example, these pressure-sensitive adhesive layers are formed by discharging pressure-sensitive adhesive from a nozzle head toward a base material flowing on a conveyance path.

  However, the conventional nozzle coating inevitably increases the coating amount of the pressure-sensitive adhesive, and the production cost increases accordingly. Also, only simple shapes such as solid and streaks can be applied. Therefore, the present applicant has proposed a method for applying an adhesive using a gravure roll in Japanese Patent Application No. 2008-268273.

  According to this, by using an adhesive with a gravure roll, it is possible not only to easily form an adhesive layer with a complicated shape, but also to reduce the dust capture performance and to reduce the amount of adhesive applied. Production costs can be reduced.

  However, this gravure coating also has the following problems. That is, conventionally, the adhesive tape for cleaning has a non-adhesive part (dry edge part) that does not have adhesiveness at both ends, but conventionally, the boundary between the fine streaky adhesive part and the dry edge part is clear. It did not look good on the appearance.

  Further, since the boundary between the pressure-sensitive adhesive layer and the dry edge portion is not clear, the pressure-sensitive adhesive sometimes protrudes to the dry edge portion side. The protrusion to the dry edge side increases as it goes from the outer peripheral side to the inner peripheral side, and the thickness of the pressure-sensitive adhesive layer may vary.

  Furthermore, if the pressure-sensitive adhesive layer is made into a complicated shape such as a dot shape or fine streaks with a gravure roll, if it is a conventional simple solid coating or streaks coating, if the adhesive tape is wound into a roll, the adhesive surface By laminating each other, an appropriate cushioning property was born on the entire roll, but in the case of gravure roll coating, for example, when formed in a dot shape, the adhesive layer is not shifted and laminated for each winding layer. The tightness of the pressure-sensitive adhesive tape becomes strong, and the pressure-sensitive adhesive is crushed particularly on the inner peripheral side, resulting in variations in the thickness of the pressure-sensitive adhesive layer.

  In addition, when applied to dots and slanted stripes, they are not continuous in the feeding direction, so they tend to cause winding slippage (meandering) in the manufacturing process. Sometimes it had to be stopped.

  Furthermore, in gravure roll coating, the surface opposite to the adhesive surface is point contact or line contact, so the rewinding force is not stable, and the tape will roll when it rolls in the reverse direction on the surface to be cleaned. The rail pulling phenomenon sticking to the surface was easy to occur.

JP 2009-219574 A

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cleaning adhesive tape roll that can stably catch dust from the beginning to the end of use.

  In order to achieve the above-described object, the present invention has several features described below. The invention according to claim 1 is formed by winding an adhesive tape having an adhesive surface formed on one surface of a substrate so that the adhesive surface faces the front side, and the adhesive surface is formed in a dot shape. In the pressure-sensitive adhesive tape roll in which a non-sticky portion having no adhesiveness extends along the feeding direction of the pressure-sensitive adhesive tape at both ends of the pressure-sensitive adhesive surface. A band-shaped side adhesive portion is disposed between the adhesive portions along the feeding direction of the adhesive tape.

  According to a second aspect of the present invention, in the first aspect, the pressure-sensitive adhesive surface further includes a flat base pressure-sensitive adhesive portion formed over substantially the entire surface of the pressure-sensitive adhesive surface, and the dot pressure-sensitive adhesive portion is dotted in the base pressure-sensitive adhesive portion. It is characterized by being.

  According to a third aspect of the present invention, in the second aspect of the invention, the base adhesive portion is formed by arranging streak-like stripe adhesive portions parallel to each other at a predetermined interval.

Invention according to claim 4, in the third aspect, the dot adhesive portion, the upper Symbol streak adhesive portion and the side pressure-sensitive portion are both are characterized in that the surface is formed on the same plane.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the side adhesive portion has a width of 2.0 to 10 mm or less. That is, when the width is smaller than 2.0 mm, since the coating width is narrow, uneven coating or the like may occur and the side adhesive portion may not function. On the other hand, if the coating width exceeds 10 mm, the strength of the side adhesive portion is excessively increased, so that the trapping power of the main dot adhesive portion and streak adhesive portion that catches dust may be reduced.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the dot adhesive portions are arranged in a staggered pattern or a lattice pattern.

A seventh aspect of the present invention provides the method according to any one of the third to sixth aspects, wherein the streak adhesive portion is formed in a portion other than the dot adhesive portion, and the feeding direction of the adhesive tape is It is characterized in that it is parallel or inclined at a predetermined angle and is provided in a large number so as to be parallel to each other with a predetermined interval.

The invention described in claim 8 is characterized in that, in any one of claims 3 to 7, the dot adhesive part, the stripe adhesive part and the side adhesive part are made of the same adhesive. Yes.

  According to the present invention, since the streaky side adhesive portion extends along the dry edge portion, it is possible to effectively prevent the adhesive layer from protruding and tightening to the dry edge side. Moreover, moderate cushioning is also born by laminating the side adhesive portions so as to overlap each other. Furthermore, the side adhesive portion also improves the bonding property with the adhesive tape of the next layer, and the occurrence of the rail pulling phenomenon can be suppressed.

The perspective view of the adhesive tape roll which concerns on one Embodiment of this invention. Sectional drawing of the principal part of the adhesive tape roll. The front view of the adhesive surface of an adhesive tape roll. The AA line partial enlarged view of an adhesive tape roll. The AA line partial expansion perspective view of an adhesive tape roll. The BB line expanded sectional view of an adhesive tape roll. (A), (b) Explanatory drawing explaining the evaluation method of the evaluation test 5. FIG.

  Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. As shown in FIG. 1, this adhesive tape roll 1 has an adhesive tape 2 on which an adhesive surface 22 for dust removal of a tape substrate 21 is formed, and the adhesive surface 2 faces the front side (outside). It consists of what was wound in roll shape along the core 3. 3 to 6, the adhesive tape 2 is actually continuous in the left-right direction with the length on the drawing as one circumferential length unit.

  In this example, a paper core such as cardboard is used as the core 3, but a synthetic resin core may also be used. Furthermore, a so-called coreless structure in which the pressure-sensitive adhesive tape roll 1 is wound without using the core 3 may be used. In the present invention, the configuration of the core 3 is arbitrary.

  The tape base material 21 is made of paper, for example, and is provided with a laminate film (not shown) on the back surface for reinforcement of the tape base material 21 and for peeling from the next layer. In the present invention, the presence / absence of the laminate film and its material are optional items. For example, by using a resin film as the tape base material 21, the laminate film becomes unnecessary.

  The adhesive surface 22 is provided with an adhesive layer 4 formed by gravure coating and non-adhesive portions 5 and 5 having no adhesiveness. 3 to 6, the pressure-sensitive adhesive layer 4 includes a todd pressure-sensitive adhesive portion 41 that is scattered over the entire surface of the tape base 21 excluding the non-adhesive portions 5 and 5, and a feeding direction of the pressure-sensitive adhesive tape (in FIG. 2). And a streak adhesive portion 42 that is inclined at a predetermined angle with respect to the left-right direction).

  The dot adhesive part 41, the stripe adhesive part 42, and the side adhesive part 43 to be described later are all made of the same adhesive. In this example, synthetic rubber adhesives are used as the adhesive, and they are applied to the surface of the sheet substrate 21 by gravure coating. The pressure-sensitive adhesive may be arbitrarily selected according to specifications.

  Referring to FIG. 3, the dot adhesive portions 41 each have a cylindrical shape, and are arranged in a lattice shape with a predetermined interval. The dot adhesive portion 41 is formed in a dot shape having a diameter of 2.0 to 4.0 mm. In this example, the dot adhesive portion 41 has a diameter of 3.0 mm, but the diameter can be arbitrarily changed according to the specification. In this example, the dot adhesive portions 41 have the same diameter, but the dot adhesive portions 41 having different diameters may be randomly arranged.

  In this example, the dot adhesive portions 41 are arranged in a lattice shape with a predetermined interval, but may be arranged in a staggered manner, for example. Furthermore, a plurality of dot adhesive portions 41 arranged in a line at a predetermined interval may be arranged in parallel in a state where the dot adhesive portions 41 are inclined at a predetermined angle with respect to the feeding direction of the adhesive tape 2. .

  Further, in this example, the dot adhesive portion 41 is formed in a cylindrical shape, but may be a polygonal shape such as a quadrangle or a hexagon, or a complicated shape such as a star shape or an arrow shape. In addition, the shape of the dot adhesive portion 41 may be arbitrarily selected according to specifications.

  The dot adhesive portion 41 is inclined so as to be shifted by one dot with respect to the feeding direction, with a length corresponding to one tape length of the tape base material 21 (the length in the left-right direction in FIG. 3) as one unit. Yes. According to this, when the adhesive tape roll 1 is rolled on the surface to be cleaned, the adhesive surface 4 can be used effectively.

  The streak adhesive portion 42 is formed by forming an extremely fine straight line continuously in parallel with each other at intervals of about 0.3 to 0.5 mm, and with respect to the feeding direction of the adhesive tape 2 (left-right direction in FIG. 2). And are arranged so as to be bridged between the non-adhesive portions 5 and 5 while being inclined at a predetermined angle.

  Since the spacing between the streaky adhesive portions 42 is very narrow, it appears that the streaked adhesive portions 42 are formed almost over the entire surface of the base material 21 in the visible state, and the dot adhesive portions 41 described above are scattered therein.

  The adhesive layer 4 is further provided with side adhesive portions 43 and 43. The side adhesive portions 43 and 43 are stripe-like adhesive portions extending along the feeding direction of the adhesive tape 2 between the end face of the stripe adhesive portion 42 and the non-adhesive portions 5 and 5. It is formed in a 3 mm strip shape. In this example, the side adhesive portion 43 is set to a width of 3 mm, but it is preferable that the side adhesive portion 43 is provided within a range of 2.0 to 10 mm.

  That is, when the width is smaller than 2.0 mm, since the coating width is narrow, uneven coating or the like may occur and the side adhesive portion may not function. On the other hand, if the coating width exceeds 10 mm, the strength of the side adhesive portion is excessively increased, so that the trapping power of the main dot adhesive portion and streak adhesive portion that catches dust may be reduced.

  Referring also to FIG. 2, the side adhesive portions 43, 43 are wound in a roll shape by extending parallel to the unadhered portions 5, 5 and along the feeding direction. Sometimes they are stacked on top of each other.

  According to this, since the side adhesive portions 43 and 43 overlap each other on the outer peripheral side and the inner peripheral side, an appropriate cushioning property is created. Can be effectively prevented. Furthermore, since the side adhesive portions 43 and 43 extend continuously, the rewinding force is improved and the occurrence of the rail pulling phenomenon is effectively suppressed.

  The adhesive tape 2 is provided with cuts 6 for cutting the adhesive tape 2 at predetermined intervals. In this example, the cuts 6 are provided at intervals that are less than 360 ° in circumferential length, and part of the used adhesive tape remains on the edge portion, so that the adhesive strength of the end of the adhesive tape 2 is intentionally left. It is devised so that the rail pulling phenomenon does not occur.

  In this example, the cuts 6 are provided at intervals of less than 360 °, but may be provided at intervals of 360 ° or more. Furthermore, the cut line 6 is a straight line parallel to the axial direction of the core 3, but may be a spiral shape so as to be easily cut, and the configuration of the cut line 6 is arbitrarily selected according to specifications. It's okay.

  Next, more specific examples of the present invention will be examined together with comparative examples. In both Examples and Comparative Examples, an adhesive tape roll was produced by the following method. First, a predetermined paper base material is prepared, and the adhesive tape 2 having the dot adhesive part 41, the streaks adhesive part 42 and the non-adhesive parts 5 and 5 shown in FIG. Further, side adhesive portions 43 and 43 having a width of 3 mm were provided, and in the comparative example, two types of adhesive tape samples without side adhesive portions were prepared.

  The pressure-sensitive adhesive layer 4 was formed using the gravure roll coating method described in Japanese Patent Application No. 2008-268273, and then wound around a paper core 80 times to produce a pressure-sensitive adhesive tape roll. Then, each evaluation test shown below was done using the produced adhesive tape roll of the Example and the comparative example.

[Evaluation Test 1: Rewinding Force]
About an Example and a comparative example, after measuring unwinding force 5 times each, the average value was computed. The measurement conditions were such that the adhesive tape laminated at a peeling speed of 1000 mm / min was peeled off with a dedicated peel tester, and the interlayer stress at the time of peeling was measured. The results are shown in Table 1 below.

  As shown in Table 1, in the example, the side adhesive portion is continuously provided, so that the rewinding force is improved by about 20% or more compared to the comparative example. Moreover, since the binding around the non-adhesive part is maintained by the side adhesive part, the adhesive tape does not unwind naturally.

[Evaluation Test 2: Crushing glue]
Next, it observed about the state of the paste (adhesive layer) crushing of an Example and a comparative example. The layer thickness of the pressure-sensitive adhesive layer was measured in order from 80 laps (outermost circumference) to 60 laps, 40 laps, 20 laps, and 1 lap (innermost circumference). In addition, when the thickness of the outermost pressure-sensitive adhesive layer was 100%, the ratio of the glue thickness in each layer and the difference in the glue thickness in each layer of the example and the comparative example were calculated. The results are shown in Table 2 below.

  As shown in Table 2, in the comparative example, the glue layer thickness gradually decreases from the outermost periphery to the innermost periphery, and the innermost layer has a maximum of 10% less than the outermost layer. On the other hand, the adhesive tape roll of the example has a stable paste layer thickness of almost 100% from the outermost periphery to the innermost periphery, and there is almost no change. In addition, even at the outermost peripheral portion where the pressure load is small, it is possible to effectively prevent the coating process from being crushed in the pass line until commercialization.

[Evaluation Test 3: Rotation Resistance Value]
The rotational resistance value (dust collection performance) due to glue crushing was evaluated. The evaluation method is that when the carpet floor is the surface to be cleaned, the adhesive surfaces of 60 laps, 40 laps, 20 laps, and 1 lap (innermost rim) are rolled on the surface to be cleaned in order from 80 laps (outermost rim). The rotational resistance value was measured. The results are shown in Table 3 below.

  As shown in Table 3, in the comparative example, the rotational resistance value gradually decreases from the outermost layer to the innermost layer due to glue crushing, and the rotational resistance value of the innermost layer decreases by about 20% compared to the outermost layer. On the other hand, in the example, since there is almost no crushed from the outermost layer to the innermost layer, the rotational resistance value is stable from beginning to end.

[Evaluation Test 4: Outer Diameter Measurement]
When paste crushing occurs, the outer diameter of the adhesive tape roll is reduced. Therefore, the surface area is reduced, and the capture performance when rolling on the surface to be cleaned is lowered. Then, the external dimension of the adhesive tape roll of an Example and a comparative example was measured five places, and the average value was computed. The results are shown in Table 4 below.

  As shown in Table 4, since the paste thickness in the outermost peripheral portion is about 4 μm thick from the result of the evaluation test 2 in the example, the outer diameter per round is 8 μm thick. Accordingly, the outer diameter of 0.64 mm becomes thick at 80 laps, so that the amount of dust supplemented per lap increases accordingly. In addition, cushioning is also enriched.

[Evaluation Test 5: Cushioning Property]
The cushioning properties of the adhesive tape rolls of Examples and Comparative Examples were evaluated. As shown in FIGS. 6 (a) and 6 (b), the evaluation method is as follows. After inserting the iron pillar 7 having the same diameter (φ38 mm) as the inner diameter of the core into the core 3, the outer side of the adhesive tape roll 1 is removed. The pressing force 8 having a diameter of 10 mm was pushed from the surface, and the compressive force at the time of pushing with a pressure of 0 to 55% with respect to the tape lamination thickness was measured. The evaluation results are shown in Table 5.

  As shown in Table 5, the examples having the side adhesive portions are generally soft from the both ends to the center and have a high degree of freedom because the side adhesive portions are laminated with each other. Therefore, the paste thickness is difficult to change, and the rotation resistance can be maintained. In addition, because of the high cushioning property, it is easy to follow the surface to be cleaned, and dust on uneven floors such as carpets can be captured effectively. Furthermore, it is possible to suppress the occurrence of rattling or the like when rolling.

[Evaluation Test 6: Various Properties]
Finally, at the manufacturing stage of the pressure-sensitive adhesive tape roll, the presence or absence of the occurrence of a winding nest (a gap formed between the tapes when the pressure-sensitive adhesive tape was wound into a roll), the presence or absence of the meandering of the base paper and the break of the base paper were checked. The results are shown in Table 6 below.

  As shown in Table 6, with respect to the examples, all of the winding nest, the meandering of the base paper, and the piece of the base paper were suppressed, and a good adhesive tape roll was formed.

DESCRIPTION OF SYMBOLS 1 Adhesive tape roll 2 Adhesive tape 21 Tape base material 3 Winding core 4 Adhesive layer 41 Dot adhesive part 42 Stripe adhesive part 43 Side adhesive part 5 Unadhesive part 6 Break

Claims (8)

A pressure-sensitive adhesive tape having an adhesive surface formed on one surface of the substrate is wound so that the adhesive surface faces the front side, and the adhesive surface has a dot-adhesive portion formed in a dot shape, In the adhesive tape roll in which the non-adhesive part not having adhesiveness extends along the feeding direction of the adhesive tape at both ends of the adhesive surface,
A cleaning pressure-sensitive adhesive tape roll, wherein a band-shaped side pressure-sensitive adhesive portion is disposed between the pressure-sensitive adhesive surface and the non-sticky portion along a feeding direction of the pressure-sensitive adhesive tape.   2. The adhesive surface according to claim 1, wherein the adhesive surface further includes a flat base adhesive portion formed over substantially the entire surface of the adhesive surface, and the dot adhesive portions are scattered in the base adhesive portion. Cleaning adhesive tape roll.   The cleaning adhesive tape roll according to claim 2, wherein the base adhesive portion is composed of stripe-shaped streak adhesive portions arranged in parallel with each other at a predetermined interval. The dot adhesive portion, the upper Symbol streak adhesive portion and the side pressure-sensitive portion are both cleaning adhesive tape roll according to claim 3, characterized in that the surface is formed on the same plane.   The cleaning adhesive tape roll according to any one of claims 1 to 4, wherein the side adhesive portion has a width of 2.0 to 10 mm or less.   The adhesive tape roll according to any one of claims 1 to 5, wherein the dot adhesive portions are arranged in a staggered pattern or a lattice pattern. The streak adhesive portion is formed in a portion other than the dot adhesive portion, is parallel to the feeding direction of the adhesive tape or inclined at a predetermined angle, and is provided in a large number so as to be parallel to each other at a predetermined interval. The pressure-sensitive adhesive tape roll according to claim 3 , wherein the pressure-sensitive adhesive tape roll is provided. The pressure-sensitive adhesive tape roll according to any one of claims 3 to 7, wherein the dot pressure-sensitive adhesive portion, the stripe pressure-sensitive adhesive portion, and the side pressure-sensitive adhesive portion are made of the same pressure-sensitive adhesive.

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