WO2015033961A1

WO2015033961A1 - Pressure-sensitive adhesive cleaner

Info

Publication number: WO2015033961A1
Application number: PCT/JP2014/073199
Authority: WO
Inventors: 富夫柿田; 土屋　和之; 和成柴田
Original assignee: 株式会社ニトムズ
Priority date: 2013-09-04
Filing date: 2014-09-03
Publication date: 2015-03-12
Also published as: KR101888278B1; KR20160051744A; CN105517478B; JPWO2015033961A1; JP6248113B2; CN105517478A

Abstract

This invention provides a pressure-sensitive adhesive cleaner that is good at cleaning up solid debris that has an oily component on the surface thereof. The pressure-sensitive adhesive cleaner provided by this invention is used to clean up solid debris that has an oily component on the surface thereof. Said pressure-sensitive adhesive cleaner has a solid-debris-trapping section that traps the aforementioned solid debris. Said solid-debris trapping section has a pressure-sensitive adhesive surface comprising a pressure-sensitive adhesive agent. In an oily-solid-debris adhesion test that measures how much of an oily-solid-debris sample adheres to a surface, said oily-solid-debris sample being obtained by adding 5 weight parts of a cooking oil to 100 weight parts of an aggregate having a central particle diameter between 1.20 and 1.50 mm, inclusive, the amount (A_C) of said oily-solid-debris sample that adheres to each square meter of the abovementioned pressure-sensitive adhesive surface is at least 200 g/m².

Description

Adhesive cleaner

The present invention relates to an adhesive cleaner used for removing solid waste having an oily component on its surface. This application claims priority based on Japanese Patent Application No. 2013-183165 filed on Sep. 4, 2013, the entire contents of which are incorporated herein by reference.

2. Description of the Related Art Adhesive cleaners that capture foreign substances (objects to be removed such as dust and debris) with an adhesive are widely used as cleaning means for floors and carpets. Such an adhesive cleaner has, for example, a rotatable roll shape, and foreign matter on the area to be cleaned can be obtained by rolling the roll while bringing the adhesive disposed on the roll surface into contact with the area to be cleaned. Can be captured by the pressure-sensitive adhesive. Patent document 1 is mentioned as a literature which discloses this kind of prior art.

Japanese Patent Application Publication No. 2004-237023

Conventional adhesive cleaners can exhibit good scavenging properties for normal solid waste, but for solid waste with oily components on the surface, such as scrap derived from snacks such as potato chips. The trapping property tended to be lower than that of ordinary solid waste. Therefore, regarding the removal of foreign matters including solid waste having oily components on the surface, it is not always easy to use. If an adhesive cleaner that can remove not only ordinary solid waste but also solid waste having oily components on its surface is provided, the removal function of the adhesive cleaner for all foreign matters will be improved, and the application range of the adhesive cleaner will be reduced. Expand and be beneficial.

The present invention relates to an improvement of the above prior art, and an object of the present invention is to provide an adhesive cleaner that can satisfactorily remove solid waste having oily components on its surface.

In order to achieve the above object, according to the present invention, there is provided an adhesive cleaner used for removing solid waste having an oily component on its surface. The adhesive cleaner includes a solid waste capturing unit that captures the solid waste. Moreover, the said solid waste capture | acquisition part has the adhesive surface comprised with the adhesive. The adhesive surface has an adhesion amount of an oily solid waste sample obtained by adding 5 parts by weight of edible oil to 100 parts by weight of the aggregate to an aggregate having a center particle diameter of 1.20 to 1.50 mm. in oily solid debris adhesion test to measure, oily solid waste samples deposition amount _{a C} per tacky surface 1 m ² exhibits a 200 g / ^{m 2} or more. Since the adhesive cleaner satisfying the above-described configuration and characteristics is excellent in capturing oily solid waste samples, it can sufficiently capture solid waste having an oily component on the surface (hereinafter also simply referred to as oily solid waste). . Therefore, it can be preferably used for the removal of foreign matters including oily solid waste (removable objects including solid waste such as dust and waste, liquid dirt, etc.).

In a preferred aspect of the technology disclosed herein, the adhesive cleaner is an oily solid waste sample in an oily solid waste removal test in which the adhesive cleaner to which the oily solid waste sample adheres falls on a hard surface from a height of 5 cm. The drop-off rate _AD is 10% or less. Adhesive cleaners that satisfy the above characteristics have excellent retention of oily solid waste samples, so that the trapped oily solid waste is firmly held, and the above-mentioned trapped oily solid waste drops off in the middle. Can be suppressed or prevented. An adhesive cleaner that satisfies the above characteristics can be particularly preferably used to remove foreign substances including oily solid waste.

In this specification, oily solid waste refers to solid waste having an oily component (oil or fat) on the surface as described above, and can also be referred to as solid waste having an oily component on at least a part of the surface. . Specific examples thereof include solid waste that contains a predetermined amount of an oily component and a part thereof on the surface, such as waste derived from snack confectionery such as potato chips.

In a preferred aspect of the technology disclosed herein, the adhesive surface exhibits a 180 degree peel strength of less than 10 N / 20 mm. The adhesive cleaner whose peel strength is suppressed to a predetermined value or less as described above is excellent in cleaning workability. Normally, when the peel strength is suppressed as described above, the solid waste capturing power tends to be reduced. However, the adhesive cleaner disclosed herein is oily, even though the peel strength is suppressed to a predetermined value or less. Excellent trapping ability for solid waste can be exhibited.

In a preferred embodiment of the technology disclosed herein, the pressure-sensitive adhesive contains an acrylic polymer in a proportion of 50% by mass or more. Moreover, it is preferable that the said adhesive is formed from the adhesive composition containing the said acrylic polymer and a crosslinking agent.

In a preferred aspect of the technology disclosed herein, the solid waste capturing portion includes a sheet-like support base, and an adhesive layer that is disposed on one surface of the support base and constitutes the adhesive surface. Are configured as a single-sided PSA sheet. By comprising in this way, oily solid waste is capture | acquired using the adhesive force of the adhesive layer surface (adhesive surface) supported by the support base material. The pressure-sensitive adhesive layer is typically a pressure-sensitive adhesive layer made of the pressure-sensitive adhesive disclosed herein.

The single-sided pressure-sensitive adhesive sheet is preferably configured as a pressure-sensitive adhesive sheet roll by being wound with the pressure-sensitive adhesive layer facing outward. By comprising in this way, an oil-based solid waste can be favorably capture | acquired by making the outer peripheral surface of an adhesive sheet roll contact a to-be-cleaned area | region. In addition, by removing the outer peripheral part used for cleaning from the roll according to the frequency of use and the amount of oily solid waste etc. attached (for example, by peeling the outer peripheral part), unused adhesive on the outer peripheral surface The agent layer can be exposed. That is, the exposure of the unused pressure-sensitive adhesive layer to the outer surface can be easily updated. By the above update, a desired cleaning performance (for example, oily solid waste capturing performance) can be maintained for a long period of time.

In a preferred aspect of the technology disclosed herein, the adhesive cleaner includes a cylindrical rolling member, and the adhesive sheet roll is disposed on the outer peripheral surface of the rolling member. According to the adhesive cleaner having such a configuration, by rolling the rolling member in the circumferential direction of the cylinder, oily solid waste or the like in the area to be cleaned is efficiently captured by the solid waste capturing portion located on the outer peripheral surface thereof. And removed from the area.

The adhesive cleaner disclosed herein may further include a gripping member that rotatably supports the rolling member. With this configuration, the user can efficiently remove oily solid waste and the like in the area to be cleaned by gripping the gripping member and rolling the rolling member.

It is a front view which shows typically the adhesion cleaner which concerns on one Embodiment. It is a side view which shows typically the adhesion cleaner concerning one embodiment. It is sectional drawing which shows typically the solid waste capture | acquisition part of the adhesion cleaner which concerns on one Embodiment. It is a figure which illustrates typically the method of an oil-based solid waste adhesion test. It is a figure which illustrates the method of an oil-based solid waste drop test typically, (a) is a figure which shows the state before the fall of an adhesion cleaner, (b) is a figure which shows the state after the said fall. 2 is an image showing an adhesion state of an oily solid waste sample of a test cleaner according to Example 1. FIG. It is an image which shows the adhesion state of the oil-based solid waste sample of the test cleaner concerning Example 2. It is an image which shows the adhesion state of the oil-based solid waste sample of the test cleaner concerning Example 3.

Hereinafter, preferred embodiments of the present invention will be described. Note that matters other than matters specifically mentioned in the present specification and necessary for the implementation of the present invention can be grasped as design matters of those skilled in the art based on the prior art in this field. The present invention can be carried out based on the contents disclosed in this specification and common technical knowledge in the field. Further, in the following drawings, members / parts having the same action are described with the same reference numerals, and overlapping descriptions may be omitted or simplified.

<Target for removal of adhesive cleaner>
The adhesive cleaner disclosed here is an adhesive cleaner used for removing solid waste (oil-based solid waste) having an oily component on the surface. Therefore, the application area | region should just be a place where oily solid waste exists, and there is no restriction | limiting in particular as long as it exists. Specific examples of oily solid waste include, for example, solid waste containing an oily component, such as waste derived from snack confectionery such as potato chips, and some of which is present on the surface; like butter and cheese Solid waste derived from dairy products containing a large amount of fat-soluble components; solid waste derived from ingredients cooked using oil such as fried foods; and the like. Examples of the region where oily solid waste is present include floors, carpets, and interior spaces. The kitchen stove periphery can also be mentioned as a suitable example of the application area. The pressure-sensitive adhesive cleaner disclosed herein is preferable as a pressure-sensitive adhesive cleaner used in the region as described above.

<Example structure of adhesive cleaner>
Hereinafter, an adhesive cleaner according to an embodiment will be described with reference to the drawings. As shown in FIGS. 1 and 2, an adhesive cleaner (hereinafter also simply referred to as a cleaner) 10 includes an adhesive sheet roll 30. The cleaner 10 also includes a holding member (core) 20 that holds the pressure-sensitive adhesive sheet roll 30, and the pressure-sensitive adhesive sheet roll 30 is held on the outer peripheral surface of the cylindrical holding member 20, It is united. The cleaner 10 further includes a cleaner main member 15, and the cleaner main member 15 includes a columnar rolling member 40 and a rod-shaped gripping member 50 that rotatably supports the rolling member 40. The holding member 20 is detachably fixed to the rolling member 40, and the holding member 20 and the adhesive sheet roll 30 are configured to rotate along the circumferential direction of the roll in conjunction with the rotation of the rolling member 40. ing.

The pressure-sensitive adhesive sheet roll 30 is formed by winding a pressure-sensitive adhesive sheet 31 serving as a solid waste capturing portion. Specifically, as shown in FIG. 3, the pressure-sensitive adhesive sheet (solid waste capturing portion) 31 is disposed on a long sheet-like (band-like) support base material 36 and one surface 36 </ b> A of the support base material 36. A single-sided pressure-sensitive adhesive sheet 31 including the pressure-sensitive adhesive layer 32 is configured. The single-sided pressure-sensitive adhesive sheet 31 is formed as a pressure-sensitive adhesive sheet roll 30 by being wound so that the pressure-sensitive adhesive layer 32 is on the outside. Although not particularly limited, the size of the cylindrical pressure-sensitive adhesive sheet roll is 10 to 200 mm (for example, 30 to 100 mm, typically 30 to 100 mm in diameter (referred to the diameter (outer diameter) when not used)). Is about 40 to 60 mm) and about 50 to 700 mm in width (for example, 60 to 350 mm, typically 80 to 160 mm).

Specifically, a center hole (not shown) is formed in the rolling member 40 constituting the cleaner main member 15 at a position serving as a central axis of the cylinder. The rolling member 40 is attached to the gripping member 50 so as to be rotatable in the circumferential direction by inserting the end (one end) of the gripping member 50 through the center hole. Further, a handle 52 as a member constituting the cleaner main member 15 is attached to the other end of the gripping member 50. The material of the holding member is not particularly limited, and those made of polyolefin, polyester or other synthetic resins or paper can be preferably used. Moreover, the material of the rolling member, the gripping member, and the handle is not particularly limited, and for example, a polyolefin-based material, a polyester-based material such as a synthetic resin, or a stainless steel material can be employed.

The cleaner 10 having the above-described configuration is used for removing dirt (foreign matter) including oily solid waste existing in a region to be cleaned such as a floor or a carpet. The typical usage mode is as follows. That is, the operator places the adhesive sheet roll 30 portion of the cleaner 10 in the area to be cleaned, holds the handle 52 and applies a predetermined external force to the cleaner 10. Then, the external force is transmitted from the gripping member 50 to the rolling member 40, and the rolling member 40 rolls. Thereby, the pressure-sensitive adhesive layer 32 of the pressure-sensitive adhesive sheet roll 30 disposed on the outer peripheral surface of the rolling member 40 moves on the cleaning area as the rolling member 40 rolls. In this way, oily solid waste on the area to be cleaned is captured by the surface (adhesive surface) 32A of the pressure-sensitive adhesive layer 32, and removal of oily solid waste from the area to be cleaned is realized.

Further, in the pressure-sensitive adhesive sheet roll, it is preferable that the pressure-sensitive adhesive sheet is provided with a cut line (not shown) for approximately one circumference. This break is a cutting means for efficiently renewing the pressure-sensitive adhesive layer surface (outer surface of the solid waste trapping portion) whose cleaning (dirt removal) performance has deteriorated after using the cleaner several times. For example, it may be a long hole or corrugated slit arranged, an intermittent slit such as a perforation. The cut is preferably provided so as to cross the pressure-sensitive adhesive sheet in the width direction (direction perpendicular to the longitudinal direction). In addition, the update of the outer peripheral surface of a solid waste capture | acquisition part is not restricted to the said cutting | disconnection means. For example, intermittent slits such as perforations are formed in a spiral shape in a direction intersecting the sheet winding direction of the adhesive sheet roll (typically, a direction intersecting at an angle of 30 to 60 ° with respect to the width direction). You may keep it. Alternatively, slits (continuous cuts) may be made at predetermined intervals in the adhesive sheet constituting the adhesive sheet roll instead of intermittent slits such as perforations. In this form, since the adhesive sheet constituting the adhesive sheet roll is formed with an intermittent slit by perforation for each circumference of the outer circumference in the roll winding direction, the outer surface of the adhesive sheet roll is peeled off for each slit. The outer surface can be easily updated. As a result of repeating the above update, after the pressure-sensitive adhesive sheet roll is used up, for example, the holding member 20 shown in FIGS. 1 and 2 is removed from the rolling member 40 and replaced with a new pressure-sensitive adhesive sheet roll to be used for cleaning again. That's fine.

The above-mentioned adhesive cleaner can be produced by appropriately adopting conventionally known methods. For example, an adhesive sheet roll of a cleaner can be produced by the same method as a conventional roll shape cleaner. That is, a pressure-sensitive adhesive layer is formed by applying a pressure-sensitive adhesive composition on the surface of a long sheet-like support base by various conventionally known coating means and then performing a drying treatment or the like. In addition, when a hot melt adhesive (thermoplastic adhesive) is employed, a heat-melt adhesive is applied as the above-mentioned adhesive composition, and the adhesive is typically allowed to cool to near room temperature. Thus, an adhesive layer can be formed. Therefore, the drying process can be omitted. And a roll-shaped adhesive sheet roll is formed by winding an adhesive sheet around a holding member so that an adhesive layer may become an outer peripheral surface. Further, the cleaner is constructed by attaching the holding member to the rolling member. It should be noted that the structure for attaching the holding member to the rolling member and the structure of the cleaner main member may be the same as those of a conventional roll-shaped cleaner and do not characterize the present invention, so a detailed description is omitted.

Note that the adhesive cleaner is not limited to the one in the above embodiment. The adhesive cleaner may be composed of, for example, only a solid waste capturing unit. Moreover, in the said embodiment, although the solid waste capture | acquisition part was comprised from the support base material and the adhesive layer, it is not limited to this. For example, the solid waste trapping part may be formed only from an adhesive (for example, a substrate-less adhesive). Or when the solid waste capture | acquisition part has a support base material, the shape etc. of this support base material are not specifically limited. For example, the solid capturing part may have a pressure-sensitive adhesive layer formed on the outer surface of a cylindrical support base. Furthermore, in the said embodiment, although the adhesive sheet roll was rotatably attached to the holding member via the rolling member, it is not limited to this. For example, the gripping member may be directly or indirectly connected (connected or detachably connected) to the solid waste capturing unit. As such an adhesive cleaner, for example, a stick-shaped gripping member having a columnar or rectangular parallelepiped-shaped adhesive body fixed to one end thereof can be mentioned.

<Characteristics of adhesive cleaner>
Adhesive cleaner disclosed herein, the oily solid debris adhesion test to measure the deposition amount of oily solid waste samples to sticky surface of the adhesive cleaners, tacky surface 1 m ² per oily solid waste samples deposition amount A _C Is preferably 200 g / m ² or more. An adhesive cleaner that satisfies this property is excellent in oily solid waste capturing properties. The coating weight _{A C} is more preferably 300 g / ^{m 2} or more, more preferably 400 g / ^{m 2} or more, particularly preferably 500 g / ^{m 2} or more (typically 600 g / ^{m 2} or more) . The oily solid waste adhesion test may be performed as follows.

[Oil solid waste adhesion test]
An oily solid waste sample to be used for the test is prepared. As an oily solid waste sample, a sample composed of an aggregate and 5 parts by weight of edible oil with respect to 100 parts by weight of the aggregate is used. Typically, aggregates with edible oil added are used. As the aggregate, one having a center particle diameter in the range of 1.20 to 1.50 mm according to the screening test method is used. It is preferable to use silica sand as the aggregate. The silica sand to which edible oil has been added may be used as an oily solid waste sample in which the edible oil is spread evenly, for example, by shaking well in a vinyl bag. The prepared oily solid waste sample is disposed so as to spread over the entire bottom surface of a tray having a flat bottom surface (for example, a 240 mm × 320 mm stainless steel tray). The adhesive surface of the adhesive cleaner is pressed against the oily solid waste sample so that the entire surface contacts the oily solid waste sample, and the oily solid waste sample is adhered to the adhesive surface of the adhesive cleaner. The amount of oily solid waste sample used may be about 200 g. And the weight W1 (g) of the adhesion cleaner after adhering the oily solid waste sample is measured, and from the difference from the initial weight W0 (g) of the adhesion cleaner before the oily solid waste sample adhered in advance. An oily solid waste sample adhesion amount W2 (W2 (g) = W1-W0) is obtained. By dividing this W2 (g) in the area of the adhesive surface of the adhesive cleaner ^{(m 2),} determined sticky surface 1 m ² per oily solid waste samples deposition amount _A C a (g / ^{m 2).}
As the silica sand used in the above test, the Shinto Color Sand 34 Series (inorganic ceramic pigments on the surface of colored aggregates (silica sand, corundum, basalt, sandstone, volcanic pumice, etc.) manufactured by Shinto Ceramics Co., Ltd.) (A fired and welded one) A center particle size of 1.20 to 1.50 mm, a particle size standard of 0.5 to 2.4 mm) can be used. As the edible oil, a product name “Nisshin Canola Oil Healthy Light” manufactured by Nisshin Oillio Group, Inc. can be used.

Further, in the case of a single-sided pressure-sensitive adhesive sheet, the solid waste capturing part of the pressure-sensitive adhesive cleaner comprises a sheet-like support base material, and a pressure-sensitive adhesive layer that is disposed on one surface of the support base material and constitutes a pressure-sensitive surface. It is desirable to carry out the oily solid waste adhesion test as follows.
A test sample was prepared by cutting the solid waste capturing part (single-sided adhesive sheet) of the adhesive cleaner to be measured into a size of 150 mm × 150 mm, and the adhesive sheet roll (diameter (diameter ( A test cleaner is prepared by attaching the test sample to the entire outer surface (outer peripheral surface) of the outer diameter (48 mm, width 160 mm) 30 so that the adhesive surface is on the outside. Next, 200 g of the oily solid waste sample is placed so as to spread over the entire bottom surface of a tray (240 mm × 320 mm stainless steel tray) having a flat bottom surface. Here, as shown in FIG. 4, the adhesive surface 32A of the produced test cleaner 10 ′ is brought into contact and rolled, and the range from one end to the other end of the tray T in the longitudinal direction is moved back and forth twice, thereby causing the adhesive The oily solid waste sample 100 is adhered to the functional surface 32A. The weight W1 (g) of the test cleaner 10 ′ after the oily solid waste sample 100 is attached is measured, and the initial weight W0 (g) of the test cleaner 10 ′ before the oily solid waste sample attached is measured in advance. ) To obtain an oily solid waste sample adhesion amount W2 (W2 (g) = W1-W0). By dividing this W2 (g) by the area (m ² ) of the exposed adhesive surface 32A of the test sample, the amount of oily solid waste sample attached A _C (g / m ² ) per 1 m ² of the adhesive surface is obtained. Ask.
The test cleaner used for the measurement is not particularly limited. For example, the total weight is about 100 to 500 g, the adhesive sheet roll weight is about 10 to 250 g, and the rolling member weight is about 10 to 50 g. Should be used. What is necessary is just to use said thing as an oil-based solid waste sample. More specifically, the oily solid waste adhesion test can be performed by the measurement method described in Examples described later. The above oily solid waste sample adhering amount A _C relating feature is of being recognized as a preferred feature for identifying the present invention, not essential constituent in the present invention. Therefore, the configuration with no limitation of the oily solid waste sample adhering amount A _C of the features are also included in the present invention.

The pressure-sensitive adhesive cleaner disclosed herein is an adhesive cleaner to which the oily solid waste sample is attached (typically, a pressure-sensitive cleaner to which the oily solid waste sample is attached by the method of the oily solid waste adhesion test). In the oily solid waste removal test for dropping onto the hard surface, the oily solid waste sample removal rate _AD is preferably 10% or less. The adhesive cleaner satisfying this characteristic is excellent in retaining oily solid waste because the amount of oily solid waste sample falling off is suppressed even when a predetermined impact is applied. The drop-off rate _AD is more preferably 5% or less, still more preferably 2% or less, and particularly preferably 1% or less. The oily solid waste removal test may be performed as follows.

[Oil solid waste removal test]
After performing the above-mentioned oily solid waste adhesion test, it is preferable to continuously perform the oily solid waste removal test. On a hard surface (typically a hard flat surface made of metal, plastic or wood), an adhesive cleaner is placed so that the bottom of the solid waste catcher is 5 cm above the hard surface. Then, the adhesive cleaner is dropped from this height, the weight W4 (g) of the adhesive cleaner after dropping is measured, and the weight W3 (g) (W1) of the adhesive cleaner before dropping measured in advance may be used. ) To obtain the oil solid waste sample dropout amount W5 (W5 (g) = W3−W4) after dropping. Then, the oil solid waste sample drop-off rate A _D (%) is obtained from the formula: A _D (%) = W5 / (W3-W0) × 100; In the above formula, W0 is the initial weight (g) of the adhesive cleaner before adhering the oily solid waste sample.

Further, in the case of a single-sided pressure-sensitive adhesive sheet, the solid waste capturing part of the pressure-sensitive adhesive cleaner comprises a sheet-like support base material, and a pressure-sensitive adhesive layer that is disposed on one surface of the support base material and constitutes a pressure-sensitive surface. After the oily solid waste adhesion test using the single-sided pressure-sensitive adhesive sheet, it is desirable to continuously perform the oily solid waste removal test as follows.
As shown in FIG. 5A, on the hard flat surface G, the pressure-sensitive adhesive sheet roll 30 of the test cleaner 10 ′ is perpendicular to the cylindrical axis direction, and the lower end of the pressure-sensitive adhesive sheet roll 30 is the hard flat surface. The end of the gripping member 50 on the handle 52 side can be turned up and down about the jig J so that the height is 5 cm from G (the height indicated by the symbol h in FIG. 5A). To fix. Between the lower end of the adhesive sheet roll 30 and the hard flat surface G, a spacer (not shown) may be disposed to hold the test cleaner 10 ′ at the above height. Then, the spacer is removed and the adhesive sheet roll 30 side of the test cleaner 10 ′ is dropped as shown in FIG. The weight W4 (g) of the test cleaner 10 ′ after dropping is measured, and the difference from the previously measured weight W3 (g) of the test cleaner 10 ′ before dropping (which may also be W1). The oil solid waste sample dropout amount W5 (W5 (g) = W3−W4) after dropping is obtained. Then, the oil solid waste sample drop-off rate A _D (%) is obtained from the formula: A _D (%) = W5 / (W3-W0) × 100; The test cleaner used for the measurement is not particularly limited. For example, the total weight is about 100 to 500 g, the adhesive sheet roll weight is about 10 to 250 g, and the rolling member weight is about 10 to 50 g. Should be used. What is necessary is just to use said thing as an oil-based solid waste sample. More specifically, the oily solid waste removal test can be performed by the measurement method described in Examples described later.

The adhesive surface of the adhesive cleaner disclosed herein preferably exhibits a 180 degree peel strength of less than 14 N / 20 mm (eg, less than 10 N / 20 mm, typically less than 8 N / 20 mm). The adhesive cleaner whose peel strength is suppressed to a predetermined value or less as described above is excellent in cleaning workability. The 180 degree peel strength is a measured value based on a 180 degree peel test on a stainless steel (SUS304) plate defined in JIS Z0237. The lower limit value of the 180-degree peel strength is preferably 3 N / 20 mm or more (for example, 5 N / 20 mm or more) from the viewpoint of solid scrap capturing ability.

The measurement of the peel strength is specifically performed according to the following procedure. A test piece is prepared by cutting a solid waste capturing portion (typically, an adhesive sheet) into a rectangular sheet. The test piece is preferably about 100 to 200 mm in length, and preferably about 15 to 30 mm in width. When the width is not 20 mm, [N / 20 mm] may be calculated (converted) from the ratio of the actual width to the reference width 20 mm. The thickness is not particularly limited. The adhesive surface (for example, the adhesive layer side surface) of the obtained test piece is attached to a stainless steel (SUS304) plate by reciprocating a 2 kg roller. When the test piece has adhesiveness on both sides, such as a double-sided pressure-sensitive adhesive sheet, it is preferable to line a polyethylene terephthalate (PET) film having a thickness of about 25 μm with respect to the surface opposite to the measurement surface. After holding this in an environment of 23 ° C. and RH 50% for 30 minutes, using a tensile tester, in accordance with JIS Z0237, in an environment of 23 ° C. and RH 50%, a peeling angle of 180 degrees and a tensile speed of 300 mm / min. 180 degree peel strength (with respect to SUS adhesive strength [N / 20 mm] is measured under the conditions. The tensile tester is not particularly limited, and a conventionally known tensile tester can be used. For example, manufactured by Shimadzu Corporation It can be measured using “Tensilon”.

In addition, when the pressure-sensitive adhesive cleaner disclosed herein has a pressure-sensitive adhesive sheet roll, the pressure-sensitive adhesive sheet roll has a pressure-sensitive adhesive force (typically, so as to suppress the occurrence of a rail pulling phenomenon on a region to be cleaned (for example, floor or carpet). The above 180 degree peel strength) and the rewinding force are preferably harmonized. Here, the rewinding force is also grasped as a force required to pull out the pressure-sensitive adhesive sheet from the pressure-sensitive adhesive sheet roll (that is, resistance to rewinding, pressure-sensitive adhesive force to the back surface of the pressure-sensitive adhesive sheet (typically the back surface of the supporting substrate)). ). For example, when the unwinding force is set to be too low compared to the adhesive force, the unwinding force is reduced between the pressure-sensitive adhesive sheet (typically the pressure-sensitive adhesive layer) and the surface when the pressure-sensitive adhesive sheet roll is rolled on the area to be cleaned. There is a risk of causing a rail pulling phenomenon by losing the adhesive force between them. On the other hand, when the rewinding force is too high, the pressure-sensitive adhesive sheet tends not to be pulled out smoothly.

Rewind force can be evaluated as follows. That is, the pressure-sensitive adhesive sheet roll is set in a predetermined tensile testing machine, and the outer peripheral side tip of the wound pressure-sensitive adhesive sheet is attached to the chuck of the testing machine in an environment of a temperature of 23 ° C. and RH of 50%. The pressure-sensitive adhesive sheet roll is rewound in the tangential direction by pulling on the sheet, and the unwinding force at this time is obtained by converting the value (N / 150 mm) per width (for example, 150 mm) of the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet. Can do. For example, a rewinding force of about 0.5 to 2.5 N / 150 mm is preferable.

<Adhesive>
The pressure-sensitive adhesive (for example, pressure-sensitive adhesive layer) constituting the solid waste capturing portion (for example, pressure-sensitive adhesive sheet) disclosed herein is not particularly limited, and for example, an aqueous pressure-sensitive adhesive composition such as a water-dispersed pressure-sensitive adhesive composition, or It can be an adhesive formed from an adhesive composition such as a solvent-type adhesive composition. A solventless pressure-sensitive adhesive formed from an active energy ray-curable pressure-sensitive adhesive composition or a hot-melt pressure-sensitive adhesive composition can also be preferably used. Of these, a solvent-based pressure-sensitive adhesive and a solventless pressure-sensitive adhesive are preferable, and a hot-melt pressure-sensitive adhesive is preferable from the viewpoint of handleability.

Examples of the pressure sensitive adhesive include rubber pressure sensitive adhesive, acrylic pressure sensitive adhesive, urethane pressure sensitive adhesive, and silicone pressure sensitive adhesive. From the viewpoint of adhesive performance and cost, rubber adhesives or acrylic adhesives can be preferably employed. Among these, an acrylic pressure-sensitive adhesive is particularly preferable.

The rubber adhesives include natural rubber polymers such as natural rubber and modified products thereof, isoprene rubber, chloroprene rubber, styrene-isoprene-styrene block copolymer, styrene-butadiene-styrene block copolymer, styrene-ethylene. / A pressure-sensitive adhesive having one or more of butylene-styrene block copolymers as a base polymer. In addition, a base polymer refers to the main component in a polymer component, and the main adhesive component. The blending ratio of the base polymer in the pressure-sensitive adhesive disclosed herein is preferably about 50% by mass or more (for example, 70% by mass or more, typically 90% by mass or more) based on the solid content, and the upper limit of the blending ratio May be 100 mass% or less (for example, 99 mass% or less).

As the acrylic pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive containing an acrylic polymer as a base polymer can be preferably used. The acrylic polymer can be synthesized from a monomer raw material containing an alkyl (meth) acrylate having an alkyl group as a main monomer. Here, the main monomer refers to a monomer component occupying 50% by mass or more of the total monomer components. In the present specification, “(meth) acrylate” means acrylate and methacrylate comprehensively. Similarly, “(meth) acryloyl” refers to acryloyl and methacryloyl, and “(meth) acryl” generically refers to acrylic and methacryl.

Examples of the alkyl (meth) acrylate include the formula:
CH ₂ = CR ¹ COOR ²
A compound represented by; can be suitably used. Here, R ¹ in the above formula is a hydrogen atom or a methyl group. R ² is an alkyl group having 1 to 20 carbon atoms (hereinafter, such a range of the number of carbon atoms may be represented as “C _1-20 ”). From the viewpoint of storage elastic modulus of the pressure-sensitive adhesive, an alkyl (meth) acrylate having a C _1-14 (for example, C _1-10 ) alkyl group is preferable, and an alkyl (meth) acrylate having a C _4-9 alkyl group is preferable. preferable. Further, from the viewpoint of capturing oily solid waste, R ² is preferably an alkyl group having 5 or more carbon atoms (typically 8 or more). The alkyl group may be linear or branched.

Examples of the alkyl (meth) acrylate having a C _1-20 alkyl group include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, and n-butyl (meth). Acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, isoamyl (meth) acrylate, neopentyl (meth) acrylate, hexyl (meth) acrylate, heptyl ( (Meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate Relate, isodecyl (meth) acrylate, bornyl (meth) acrylate, isobornyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, tetradecyl (meth) acrylate, pentadecyl (meth) acrylate, Examples include hexadecyl (meth) acrylate, heptadecyl (meth) acrylate, octadecyl (meth) acrylate, nonadecyl (meth) acrylate, and eicosyl (meth) acrylate. These alkyl (meth) acrylates can be used alone or in combination of two or more. Preferred examples include 2-ethylhexyl acrylate (2EHA) and isononyl acrylate. Among these, 2EHA is more preferable.

The blending ratio of the main monomer in all monomer components is preferably 60% by mass or more, more preferably 80% by mass or more, and further preferably 90% by mass or more. The upper limit of the mixing ratio of the main monomer is not particularly limited, but is preferably 99% by mass or less (for example, 98% by mass or less, typically 95% by mass or less). The acrylic polymer may be obtained by polymerizing only the main monomer.

The monomer raw material used for polymerizing the acrylic polymer may contain a submonomer copolymerizable with the main monomer in addition to the main monomer for the purpose of improving various properties such as light peelability. In addition, the said submonomer shall contain not only a monomer but an oligomer. Examples of such a submonomer include a monomer having a functional group (hereinafter also referred to as a functional group-containing monomer). The functional group-containing monomer can be added for the purpose of introducing a crosslinking point into the acrylic polymer and increasing the cohesive strength of the acrylic polymer. Such functional group-containing monomers include carboxyl group-containing monomers, acid anhydride group-containing monomers, hydroxyl group (hydroxyl group) -containing monomers, amide group-containing monomers, amino group-containing monomers, epoxy group (glycidyl group) -containing monomers, alkoxy And group-containing monomers and alkoxysilyl group-containing monomers. These can be used alone or in combination of two or more. Among them, a functional group-containing monomer such as a carboxyl group, a hydroxyl group, or an epoxy group can be suitably introduced into the acrylic polymer and the cohesive force of the acrylic polymer can be further increased. Are preferred, and carboxyl group-containing monomers or hydroxyl group-containing monomers are more preferred.

Examples of the carboxyl group-containing monomer include ethylenically unsaturated monocarboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, carboxyethyl (meth) acrylate, and carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, and citracone. Examples thereof include ethylenically unsaturated dicarboxylic acids such as acids. Of these, acrylic acid and / or methacrylic acid are preferable, and acrylic acid is particularly preferable.
Examples of the acid anhydride group-containing monomer include acid anhydrides such as the above ethylenically unsaturated dicarboxylic acids such as maleic anhydride and itaconic anhydride.
Examples of the hydroxyl group (hydroxyl group) -containing monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxy Unsaturated alcohols such as hydroxyalkyl (meth) acrylates such as butyl (meth) acrylate, N-methylol (meth) acrylamide, vinyl alcohol, allyl alcohol, 2-hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether, diethylene glycol monovinyl ether Etc.
Examples of amide group-containing monomers include (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N-butyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylolpropane (meth) acrylamide, N- Examples include methoxymethyl (meth) acrylamide and N-butoxymethyl (meth) acrylamide.
Examples of the amino group-containing monomer include aminoethyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, t-butylaminoethyl (meth) acrylate, and the like.
Examples of the epoxy group (glycidyl group) -containing monomer include glycidyl (meth) acrylate, methyl glycidyl (meth) acrylate, and allyl glycidyl ether.
Examples of the alkoxy group-containing monomer include methoxyethyl (meth) acrylate and ethoxyethyl (meth) acrylate.
Examples of the alkoxysilyl group-containing monomer include 3- (meth) acryloxypropyltrimethoxysilane, 3- (meth) acryloxypropyltriethoxysilane, 3- (meth) acryloxypropylmethyldimethoxysilane, and 3- (meth). Examples include acryloxypropylmethyldiethoxysilane.

When the functional group-containing monomer is used as a monomer constituting the acrylic polymer, the functional group-containing monomer (preferably a carboxyl group-containing monomer) is 1 to 4 in all monomer components for polymerizing the acrylic polymer. 10% by mass (for example, 2 to 8% by mass, typically 3 to 7% by mass) is preferably blended.

Further, as a secondary monomer, a monomer other than the functional group-containing monomer may be included for the purpose of increasing the cohesive strength of the acrylic polymer. Examples of such monomers include vinyl ester monomers such as vinyl acetate and vinyl propionate; aromatic vinyl compounds such as styrene, substituted styrene (α-methylstyrene and the like), vinyl toluene, and the like.

The method for polymerizing the monomer or a mixture thereof is not particularly limited, and a conventionally known general polymerization method can be employed. Examples of such a polymerization method include solution polymerization, emulsion polymerization, bulk polymerization, and suspension polymerization. Of these, solution polymerization is preferred. The mode of polymerization is not particularly limited, and a conventionally known monomer supply method, polymerization conditions (temperature, time, pressure, etc.), and use components other than the monomer (polymerization initiator, surfactant, etc.) can be appropriately selected and carried out. it can. For example, as a monomer supply method, the entire monomer mixture may be supplied to the reaction vessel at a time (collective supply), or may be gradually dropped and supplied (continuous supply), or divided into several times for a predetermined time. Each quantity may be supplied (divided supply) every time. The monomer or a mixture thereof may be partially or entirely supplied as a solution dissolved in a solvent or a dispersion emulsified in water.

The polymerization initiator is not particularly limited. For example, azo initiator such as 2,2′-azobisisobutyronitrile, peroxide initiator such as benzoyl peroxide, phenyl substituted ethane, etc. Examples thereof include substituted ethane-based initiators, redox-based initiators in which peroxides such as a combination of peroxide and sodium ascorbate and a reducing agent are combined. The amount of the polymerization initiator used can be appropriately selected according to the type of polymerization initiator, the type of monomer (composition of the monomer mixture), etc. Usually, for example, 0.005 to 1 with respect to 100 parts by mass of all monomer components It is appropriate to select from a range of about part by mass. The polymerization temperature can be, for example, about 20 ° C. to 100 ° C. (typically 40 ° C. to 80 ° C.).

In addition, it is preferable to add a crosslinking agent to the pressure-sensitive adhesive composition. For example, preferable examples of the crosslinking agent for the acrylic pressure-sensitive adhesive include organic metal salts such as zinc stearate and barium stearate, epoxy crosslinking agents, isocyanate crosslinking agents and the like. You may use an oxazoline type crosslinking agent, an aziridine type crosslinking agent, a metal chelate type crosslinking agent, and a melamine type crosslinking agent. These crosslinking agents may be used alone or in combination of two or more. Of these, epoxy crosslinking agents and isocyanate crosslinking agents can be suitably cross-linked with carboxyl groups, have good operability (typically light release properties), and are excellent in acid resistance. Is preferred, and an isocyanate-based crosslinking agent is particularly preferred. The blending amount of the crosslinking agent is not particularly limited, but in order to realize the above-mentioned preferable numerical range of adhesive strength, 0.01 to 10 parts by mass (for example, 0 to 100 parts by mass of the base polymer (for example, acrylic polymer)) 0.05 to 5 parts by mass, typically 0.1 to 5 parts by mass).

In addition, when a solvent-based pressure-sensitive adhesive is employed, the solvent used is an aliphatic hydrocarbon such as hexane, heptane, or mineral spirit, an alicyclic hydrocarbon such as cyclohexane, toluene, xylene, solvent naphtha, tetralin, dipentene, or the like. Aromatic hydrocarbons, alcohols such as butyl alcohol, isobutyl alcohol, cyclohexyl alcohol, 2-methylcyclohexyl alcohol, tridecyl alcohol, esters such as methyl acetate, ethyl acetate, isopropyl acetate and butyl acetate, ketones such as acetone and methyl ethyl ketone Etc. are mentioned as suitable examples.

The molecular weight (Mw: weight average molecular weight) of the base polymer used (synthesized) (for example, acrylic polymer) is not particularly limited, but a polymer having a weight average molecular weight (Mw) of about 300,000 to 1,000,000 (approximately) For example, an acrylic polymer) can be preferably used.

The pressure-sensitive adhesive in the technology disclosed herein has, as a base polymer, a hard segment (A) (hereinafter also referred to as “A block”) and a soft segment (B) (hereinafter also referred to as “B block”) in one molecule. An acrylic block copolymer having the following may be included. The hard segment (A) refers to a relatively hard block in relation to the soft segment (B) in the acrylic copolymer in the structure of the acrylic block copolymer. The soft segment (B) refers to a relatively soft block in the relationship with the hard segment (A) in the structure of the acrylic block copolymer.

The acrylic block copolymer may exhibit the properties of a thermoplastic polymer (typically a thermoplastic elastomer). The pressure-sensitive adhesive disclosed herein can be a pressure-sensitive adhesive (hot-melt pressure-sensitive adhesive) suitable for coating in a hot-melt format by including the acrylic block copolymer as a base polymer. The hot-melt adhesive includes a general organic solvent-type acrylic adhesive (typically a random copolymer synthesized by solution polymerization from a monomer raw material having an acrylic monomer as a main monomer as a base polymer. Since the amount of the organic solvent used can be reduced as compared with the pressure-sensitive adhesive), it is preferable from the viewpoint of reducing the environmental load.

Here, the acrylic block copolymer is a monomer having at least one (meth) acryloyl group in one molecule (hereinafter referred to as “acrylic monomer”) as a monomer unit (constituent monomer component) constituting the copolymer. Also referred to as a block-structured polymer containing monomer units derived from That is, it refers to a block copolymer containing monomer units derived from acrylic monomers. For example, an acrylic block copolymer in which 50% by mass or more of all monomer units are monomer units derived from an acrylic monomer is preferable. Such an acrylic block copolymer can be preferably synthesized from, for example, a monomer raw material containing an alkyl (meth) acrylate having an alkyl group as a main monomer.

As the acrylic block copolymer, one having at least one acrylate block (hereinafter also referred to as Ac block) and at least one methacrylate block (hereinafter also referred to as MAc block) can be preferably used. . For example, a block copolymer having a structure in which Ac blocks and MAc blocks are alternately arranged is preferable. The total number of blocks of Ac blocks and MAc blocks contained in one molecule of polymer can be, for example, about 2.5 to 5 on average (for example, about 2.7 to 3.3, typically about 3).

The above-mentioned Ac block typically has alkyl acrylate as the main monomer. That is, it is preferable that 50% by mass or more of all monomer units constituting the Ac block are monomer units derived from alkyl acrylate. 75 mass% or more (for example, 90 mass% or more) of the monomer unit may be derived from alkyl acrylate. In a preferred embodiment, the Ac block contained in the acrylic block copolymer is a polymer substantially composed of one or more (typically one) alkyl acrylate. Alternatively, the Ac block may be a copolymer of an alkyl acrylate and another monomer (for example, alkyl methacrylate).

Examples of the alkyl acrylate constituting the Ac block include alkyl acrylates having an alkyl group having 1 to 20 carbon atoms (preferably 4 to 14, for example, 6 to 12). For example, methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate (BA), isobutyl acrylate, tert-butyl acrylate, n-pentyl acrylate, n-hexyl acrylate, n-heptyl acrylate, n-octyl Examples thereof include acrylate, 2-ethylhexyl acrylate (2EHA), nonyl acrylate, isononyl acrylate, decyl acrylate, dodecyl acrylate, stearyl acrylate and the like. These can be used alone or in combination of two or more.

In a preferred embodiment, 50% by mass or more of the monomers constituting the Ac block is an alkyl acrylate having 4 to 14 carbon atoms in the alkyl group. The proportion of the alkyl acrylate having 4 to 14 carbon atoms in the alkyl group may be 75% by mass or more, or substantially 100% by mass. For example, a constitution in which the monomer unit constituting the Ac block is substantially BA alone, a constitution in which 2EHA is alone, a constitution comprising two types of BA and 2EHA, and the like can be preferably employed. In addition, from the viewpoint of capturing oily solid waste, an Ac block in which an alkyl acrylate having 5 or more (typically 8 or more) carbon atoms in an alkyl group is formed in the above ratio is more preferable.

The MAc block typically has alkyl methacrylate as the main monomer. Of all the monomer units constituting the MAc, 75% by mass or more (for example, 90% by mass or more) may be derived from alkyl methacrylate. In a preferred embodiment, the MAc block contained in the acrylic block copolymer is a polymer consisting essentially of one or more (typically one) alkyl methacrylate. Alternatively, the MAc block may be a copolymer of alkyl methacrylate and another monomer (for example, alkyl acrylate).

Examples of the alkyl methacrylate constituting the MAc block include alkyl methacrylates having 1 to 20 (preferably 1 to 14) carbon atoms in the alkyl group. Specific examples thereof include, for example, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, n-pentyl methacrylate, n-hexyl methacrylate, n-heptyl methacrylate, Examples thereof include n-octyl methacrylate, 2-ethylhexyl methacrylate, nonyl methacrylate, isononyl methacrylate, decyl methacrylate, dodecyl methacrylate, stearyl methacrylate and the like. These can be used alone or in combination of two or more.

In a preferred embodiment, 50% by mass or more of the monomers constituting the MAc block is alkyl methacrylate having 1 to 4 (preferably 1 to 3) carbon atoms in the alkyl group. The proportion of the alkyl methacrylate having 1 to 4 carbon atoms in the alkyl group may be 75% by mass or more, or substantially 100% by mass. Among these, preferred alkyl methacrylates include methyl methacrylate (MMA) and ethyl methacrylate (EMA). For example, a configuration in which the monomer unit is substantially MMA alone, a configuration in which the monomer unit is EMA alone, a configuration composed of two types of MMA and EMA, and the like can be preferably employed.

The acrylic block copolymer is composed of an A block (hard segment (A)) made of a polymer having a hard structure excellent in cohesion and elasticity, such as AB type, ABA type, ABAB type, and ABABA type. The B block (soft segment (B)) made of a polymer having a soft structure excellent in the structure may be copolymerized so as to be alternately arranged. The pressure-sensitive adhesive using the acrylic block copolymer having such a structure as a base polymer can form a pressure-sensitive adhesive layer in which cohesive force, elasticity and viscosity are highly compatible. Moreover, the adhesive of this composition can be preferably used as a hot melt adhesive. An acrylic block copolymer (ABA type, ABABA type, etc.) having a structure in which A blocks are arranged at both ends of the molecule can be preferably used. An acrylic block copolymer having such a structure is preferable because it tends to have a good balance between cohesiveness and thermoplasticity.

When the acrylic block copolymer has two or more A blocks, the monomer composition, molecular weight (degree of polymerization), structure, etc. of these A blocks may be the same or different. The same applies to the B block when the acrylic block copolymer has two or more B blocks.

As the A block, the MAc block as described above can be preferably used. As the B block, the Ac block as described above can be preferably adopted. In a preferred embodiment, the acrylic block copolymer is a triblock copolymer having a MAc block-Ac block-MAc block (ABA type) structure. For example, such a triblock copolymer in which two MAc blocks have substantially the same monomer composition can be preferably employed.

The mass ratio of the hard segment (A) and the soft segment (B) contained in the acrylic block copolymer is not particularly limited. For example, the mass ratio (A / B) of the hard segment (A) / soft segment (B) can be in the range of 4/96 to 90/10, and is usually in the range of 7/93 to 70/30. It is preferable that the range is 10/90 to 50/50 (for example, 15/85 to 40/60). In the acrylic block copolymer containing two or more hard segments (A), the mass ratio of the total mass of the hard segments (A) to the soft segments (B) is preferably in the above range. The same applies to an acrylic block copolymer containing two or more soft segments (B). When the proportion of the hard segment (A) (for example, MAc block) is large, the adhesive strength tends to decrease, and light peelability tends to be easily obtained. When there is much ratio of a soft segment (B) (for example, Ac block), there exists a tendency for the capture | acquisition performance of oily solid waste to improve.

In the technology disclosed herein, the weight average molecular weight (Mw) of the acrylic block copolymer is not particularly limited, and for example, those having an Mw of about 3 × 10 ⁴ to 30 × 10 ⁴ can be preferably used. The Mw of the acrylic block copolymer is usually preferably in the range of about 3.5 × 10 ⁴ to 25 × 10 ⁴ , for example 4 × 10 ⁴ to 20 × 10 ⁴ (for example, 4.5 × 10 ⁴ to 15 × 10 ⁴ ). The range of ⁴ ) is more preferable. Increasing the Mw of the acrylic block copolymer is advantageous from the viewpoint of improving adhesive properties (for example, cohesiveness) and improving oil trapping property. On the other hand, lowering the Mw of the acrylic block copolymer is advantageous from the viewpoint of reducing the viscosity (for example, melt viscosity) of the pressure-sensitive adhesive. Reducing the melt viscosity of the pressure-sensitive adhesive is particularly significant when the pressure-sensitive adhesive is a hot-melt pressure-sensitive adhesive. The Mw of the acrylic block copolymer referred to here is obtained by performing gel permeation chromatography (GPC) measurement on a sample prepared by dissolving the copolymer in an appropriate solvent (for example, tetrahydrofuran (THF)). The value in terms of polystyrene.

The acrylic block copolymer in the technology disclosed herein may be copolymerized with monomers other than alkyl acrylate and alkyl methacrylate (other monomers). Examples of the other monomers include vinyl compounds having functional groups such as alkoxy groups, epoxy groups, hydroxyl groups, amino groups, amide groups, cyano groups, carboxyl groups, and acid anhydride groups, vinyl esters such as vinyl acetate, styrene, etc. Examples thereof include aromatic vinyl compounds and vinyl group-containing heterocyclic compounds such as N-vinylpyrrolidone. Alternatively, alkyl acrylates, fluorinated alkyl acrylates and fluorinated alkyl methacrylates having a structure in which a fluorinated alkyl group is bonded to an acryloyl group can be mentioned. The other monomers can be used, for example, for the purpose of adjusting the properties (adhesive properties, moldability, etc.) of the pressure-sensitive adhesive layer, and the content thereof is 20% by mass of the total monomer components constituting the acrylic block copolymer. It is appropriate to set it below (for example, 10 mass% or less, typically 5 mass% or less). In a preferred embodiment, the acrylic block copolymer contains substantially no other monomer.

Such an acrylic block copolymer can be easily synthesized by a known method (for example, see JP-A Nos. 2001-234146 and 11-323072), or a commercially available product can be easily obtained. It can be obtained. Examples of the commercially available products include Kuraray's product name “LA polymer” series (for example, product numbers such as LA2140e and LA2250), Kaneka's product name “NABSTAR”, and the like. As a method for synthesizing the acrylic block copolymer, a method utilizing a living polymerization method can be preferably employed. According to the living polymerization method, it is possible to synthesize an acrylic block copolymer excellent in thermoplasticity by maintaining the original weather resistance of the acrylic polymer and by controlling the structure unique to the living polymerization method. In addition, since the molecular weight distribution can be controlled narrowly, a pressure-sensitive adhesive (and hence a pressure-sensitive adhesive sheet (solid waste trapping part)) excellent in light release properties is realized by suppressing the lack of cohesiveness due to the presence of low molecular weight components. obtain.

When the adhesive (for example, adhesive layer) in the technology disclosed herein contains an acrylic block copolymer, the acrylic block copolymer may be used alone or in combination of two or more. it can. Further, in addition to the acrylic block copolymer, components other than the acrylic block copolymer may be included as an optional component for the purpose of controlling adhesive properties and the like. Examples of the optional component include polymers and oligomers other than the acrylic block copolymer. The blending amount of these polymers and oligomers (hereinafter also referred to as optional polymers) is suitably 50 parts by mass or less, preferably 10 parts by mass or less, per 100 parts by mass of the acrylic block copolymer. More preferably 5 parts by mass or less. In a preferred embodiment, the pressure-sensitive adhesive layer may contain substantially no polymer other than the acrylic block copolymer.

The pressure-sensitive adhesive in the technology disclosed herein can contain a tackifier as necessary. As a tackifier, well-known tackifier resin etc. can be used in the field | area of an adhesive. For example, hydrocarbon tackifier resin, terpene tackifier resin, rosin tackifier resin, phenol tackifier resin, epoxy tackifier resin, polyamide tackifier resin, elastomer tackifier resin, ketone tackifier resin Etc. These can be used alone or in combination of two or more.

Examples of hydrocarbon-based tackifying resins include aliphatic hydrocarbon resins, aromatic hydrocarbon resins (xylene resins, etc.), aliphatic cyclic hydrocarbon resins, aliphatic / aromatic petroleum resins (styrene-olefins) And other hydrocarbon resins such as aliphatic / alicyclic petroleum resins, hydrogenated hydrocarbon resins, coumarone resins, coumarone-indene resins, and the like. Examples of terpene-based tackifier resins include terpene resins such as α-pinene polymers and β-pinene polymers; modified terpenes obtained by modifying these terpene resins (phenol modification, aromatic modification, hydrogenation modification, etc.) Resin (for example, terpene phenol resin, styrene-modified terpene resin, hydrogenated terpene resin, hydrogenated terpene phenol resin, etc.); Examples of rosin tackifier resins include unmodified rosins such as gum rosin and wood rosin (raw rosin); modified rosins modified with hydrogenation, disproportionation, polymerization, etc. (hydrogenated rosin, unmodified rosin) Averaged rosin, polymerized rosin, other chemically modified rosins, etc.); various other rosin derivatives; Examples of phenolic tackifying resins include resol-type or novolac-type alkylphenol resins. Among these, preferable tackifiers include terpene resins, modified terpene resins, and alkylphenol resins.

The softening point of the tackifier is not particularly limited, but is preferably 160 ° C. or lower, more preferably 140 ° C. or lower, from the viewpoint of increasing the adhesive force and obtaining solid waste capturing properties. Moreover, from a viewpoint of avoiding the excessive raise of adhesive force, 60 degreeC or more is preferable and 80 degreeC or more is more preferable.

Although the compounding quantity of a tackifier is not specifically limited, From a viewpoint of avoiding the excessive raise of adhesive force, it can be 50 mass parts or less with respect to 100 mass parts of base polymers (for example, acrylic polymer), for example. Is suitably 40 parts by mass or less, preferably 30 parts by mass or less. Further, from the viewpoint of better exhibiting the effect of blending the tackifier, it is appropriate that the blending amount with respect to 100 parts by mass of the base polymer is, for example, 1 part by mass or more. Or the adhesive which does not contain such tackifier substantially may be sufficient.

The pressure-sensitive adhesive composition (or pressure-sensitive adhesive or pressure-sensitive adhesive layer) in the technology disclosed herein includes surfactants, chain transfer agents, plasticizers, anti-aging agents, antioxidants, ultraviolet absorbers, light Various additives known in the field of pressure-sensitive adhesives such as stabilizers, antistatic agents, colorants (pigments, dyes, etc.) can be blended. The types and blending amounts of these additional components that are not essential components may be the same as the normal types and blending amounts of this type of pressure-sensitive adhesive. In addition, the technique disclosed here can be implemented also in the aspect which does not contain a plasticizer substantially from a viewpoint of the capture | acquisition property of oily solid waste.

<Adhesive layer>
When forming an adhesive (for example, adhesive layer) from the adhesive composition disclosed here, the formation method is not particularly limited. For example, it is possible to apply a method in which the pressure-sensitive adhesive composition is directly applied (typically applied) to a support substrate and dried using a conventionally known application means such as a die coater or a gravure roll coater. Further, the pressure-sensitive adhesive composition is applied to a surface having good releasability (for example, the surface of a release liner, the back surface of a release support substrate, etc.) and dried to form a pressure-sensitive adhesive layer on the surface. A method (transfer method) of transferring the pressure-sensitive adhesive layer to a supporting substrate may be employed. It may be a substrate-less type pressure-sensitive adhesive layer obtained by applying the pressure-sensitive adhesive composition to a surface having good peelability and drying it.

The thickness of the pressure-sensitive adhesive layer can be appropriately selected according to the purpose and is not particularly limited. From the viewpoint of obtaining sufficient oily solid waste capturing properties, the thickness of the pressure-sensitive adhesive layer is preferably about 5 μm or more (for example, 10 μm or more, typically 20 μm or more), and 300 μm or less (for example, 150 μm or less, typically Specifically, the thickness is preferably 100 μm or less, and more preferably 50 μm or less.

When forming the pressure-sensitive adhesive layer on the surface of the supporting substrate, the pressure-sensitive adhesive layer may be formed over the entire range of one surface of the supporting substrate, or, for example, both ends in the width direction of the supporting substrate. A non-adhesive part (dry edge) in which the adhesive layer is not formed may be provided. The pressure-sensitive adhesive layer is typically formed continuously, but may be formed in a regular or random pattern such as a dot or stripe depending on the purpose and application. Furthermore, the pressure-sensitive adhesive layer may have a multilayer structure of two or more layers. The pressure-sensitive adhesive layer in the technology disclosed herein is formed as a continuous film on one surface of a supporting substrate, and a conventionally known pressure-sensitive adhesive layer is formed on the surface thereof in a stripe shape or the like. It is good also as an agent layer. Conversely, a conventionally known pressure-sensitive adhesive layer is formed as a continuous film on one surface of a supporting substrate, and the pressure-sensitive adhesive layer in the technique disclosed herein is formed in a stripe shape or the like on the surface. A pressure-sensitive adhesive layer having a layer structure may be used.

<Support base material>
When the solid waste capturing portion disclosed herein is provided with a support base as in the above embodiment, for example, a material composed of various synthetic resins, nonwoven fabrics, or paper may be used as the support base. it can. The material of the support substrate may be a cloth, a rubber sheet, a foam sheet, a metal foil, a composite thereof, or the like.

Examples of the synthetic resin include polyolefin (polyethylene, polypropylene, ethylene-propylene copolymer, etc.), polyester (polyethylene terephthalate, etc.), vinyl chloride resin, vinyl acetate resin, polyimide resin, polyamide resin, fluororesin and the like. In particular, a support substrate made of polyethylene terephthalate (PET) can be suitably used. Examples of paper include Japanese paper, craft paper, glassine paper, high-quality paper, synthetic paper, topcoat paper, and the like. Examples of the fabric include woven fabrics and non-woven fabrics made of various fibrous substances alone or by blending. Examples of the fibrous material include cotton, suf, manila hemp, pulp, rayon, acetate fiber, polyester fiber, polyvinyl alcohol fiber, polyamide fiber, polyolefin fiber and the like. Examples of rubber sheets include natural rubber sheets and butyl rubber sheets. Examples of the foam sheet include a foamed polyurethane sheet and a foamed polychloroprene rubber sheet. Examples of the metal foil include aluminum foil and copper foil. For the support substrate, fillers (inorganic fillers, organic fillers, etc.), anti-aging agents, antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, lubricants, plasticizers, and coloring, if necessary Various additives such as additives (pigments, dyes, etc.) may be blended.

Further, when a single-sided pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive layer is formed on one side of the support base material is adopted as the solid waste trapping part, a silicone-based release agent is provided on the back surface (surface where the pressure-sensitive adhesive layer is not formed) of the support base material. Surface treatment (typically a peeling treatment to prevent the rewinding force from becoming too high) to adjust the rewinding force of the pressure-sensitive adhesive sheet roll to an appropriate range, such as coating preferable.

The thickness of the support substrate can be appropriately selected according to the purpose and is not particularly limited. In general, the thickness is preferably about 20 μm or more (for example, 30 μm or more, typically 40 μm or more), about 200 μm or less (for example, 150 μm or less, typically 100 μm or less, or even 70 μm or less). Is appropriate. For example, the above thickness can be preferably employed for a synthetic resin, a nonwoven fabric, or a paper support substrate. When the supporting substrate is a foam sheet, the thickness is preferably about 0.6 to 3 mm (for example, about 0.6 to 2 mm, typically about 0.8 to 1.2 mm).

Hereinafter, examples relating to the present invention will be described, but the present invention is not intended to be limited to those shown in the specific examples. In the following description, “part” and “%” are based on mass unless otherwise specified.

<Example 1>
Under an inert gas atmosphere, 2-ethylhexyl acrylate (2EHA) and acrylic acid (AA) are uniformly dissolved and mixed in 80 parts of toluene so that the mass ratio is 2EHA: AA = 95: 5, and a polymerization initiator is obtained. As a result, 0.2 part of benzoyl peroxide was added to conduct a polymerization reaction to prepare an acrylic polymer solution having a weight average molecular weight (Mw) of about 500,000 to 600,000. Next, 2 parts of an isocyanate-based crosslinking agent (trade name “Coronate L” manufactured by Nippon Polyurethane Industry Co., Ltd.) was mixed with 100 parts of the acrylic polymer to prepare an acrylic pressure-sensitive adhesive composition.
After applying the acrylic pressure-sensitive adhesive composition obtained above to one surface of the support substrate, a pressure-sensitive adhesive layer having a thickness (glue thickness) of about 20 μm is obtained by performing a drying treatment at 110 ° C. for 3 minutes. A single-sided pressure-sensitive adhesive sheet formed on one side of the support substrate was produced. As the supporting substrate, a supporting substrate in which a polyethylene film having a thickness of 20 μm is laminated on the other surface of the paper having a thickness of 50 μm (the surface opposite to the surface on which the adhesive layer is formed, that is, the back surface) is used. Using. The surface of the polyethylene film is subjected to a release treatment with a silicone release agent. The obtained single-sided pressure-sensitive adhesive sheet was wound around the surface of a paper cylindrical holding member to form a pressure-sensitive adhesive sheet roll. Then, a cleaner main member 15 as schematically shown in FIGS. 1 and 2 is prepared, and the holding member is attached to a cylindrical columnar member (having a hollow portion) made of polypropylene. Such an adhesive cleaner was constructed.

<Example 2>
A rubber-based pressure-sensitive adhesive composition containing 100 parts of a styrene-isoprene-styrene copolymer (SIS) as a base polymer, 100 parts of a tackifying resin, and 100 parts of process oil was prepared. One side where a pressure-sensitive adhesive layer having a thickness (glue thickness) of about 15 μm is formed on one side of the supporting base material by extruding it in a heated and melted state, applying it to one side of the supporting base material, and performing a drying treatment. An adhesive sheet was prepared. As the SIS, a trade name “Quintac 3520” manufactured by Zeon Corporation was used. As the tackifier resin, trade name “Escollet 1310” manufactured by Tonen Chemical Co., Ltd. was used. As the process oil, a trade name “Knife Rex 222B” manufactured by Japan Chemtech Co., Ltd. was used. An adhesive cleaner according to Example 2 was constructed in the same manner as Example 1 except that the above single-sided adhesive sheet was used.

<Example 3>
The rubber-based pressure-sensitive adhesive composition prepared in Example 2 is extruded in a heated and melted state, applied to one surface of a supporting base material, and dried to give a stripe shape (stripe thickness) of about 20 μm (stripe thickness). A single-sided pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive layer was formed on one side of a supporting base was prepared. An adhesive cleaner according to Example 3 was constructed in the same manner as Example 1 except that the above single-sided adhesive sheet was used.

[Oil solid waste adhesion test]
A single-sided pressure-sensitive adhesive sheet according to each example was cut into a size of 150 mm × 150 mm (area of adhesive surface 0.0225 m ² ) to prepare a test sample. This test sample is affixed to the entire outer surface (outer peripheral surface) of the adhesive sheet roll (diameter 48 mm, width 160 mm) 30 of the adhesive cleaner 10 shown in FIGS. Thus, a test cleaner was prepared. In this test cleaner, the rolling member (weight approximately 26.5 g) 40 and the handle 52 are made of polypropylene, and the rod-like portion of the gripping member 50 is a stainless steel member having a diameter of 5 mm. The total length of the test cleaner was about 40 cm, the total weight was about 241 g, the pressure-sensitive adhesive sheet roll 30 was about 113 g, and the cleaner main member 15 was about 128 g. The pressure-sensitive adhesive sheet roll 30 is formed by winding the single-sided pressure-sensitive adhesive sheet according to Example 2 around a paper cylindrical holding member until the thickness is about 1 cm.
Moreover, the oil-based solid waste sample used for a test was prepared. As an oily solid waste sample, edible oil is added to silica sand as an aggregate at a ratio of 5 parts by weight with respect to 100 parts by weight of the silica sand, and shaken well in a vinyl bag so that the edible oil spreads uniformly throughout the silica sand. I prepared something like this. As the silica sand, color aggregate (trade name: Shinto Color Sand 34 series, center particle size 1.20-1.50 mm, particle size standard 0.5-2.4 mm) manufactured by Shinto Ceramics Co., Ltd. is used. The product name “Nisshin Canola Oil Healthy Light” manufactured by Nisshin Oillio Group was used.
The oily solid waste sample 200 g prepared above was uniformly arranged so as to spread over the entire flat bottom surface of the tray (240 mm × 320 mm stainless steel tray). As shown in FIG. 4, the adhesive surface 32A of the produced test cleaner 10 ′ is brought into contact with the tray T on which the oily solid waste sample 100 is arranged, and is rolled, from one end to the other end in the longitudinal direction of the tray T. The oily solid waste sample 100 was adhered to the adhesive surface 32A by reciprocating the range.
The weight W1 (g) of the test cleaner 10 'after the oily solid waste sample 100 is adhered is measured, and the oily solid is determined from the difference from the initial weight W0 (g) of the test cleaner 10' measured in advance. The adhesion amount W2 (W2 (g) = W1-W0) of the scrap sample is obtained, and the adhesive surface 1 m is obtained by dividing W2 (g) by the area (m ² ) of the exposed adhesive surface 32A of the test sample. oily solid waste samples deposition amount per ² _a was determined C (g / ^{m 2).} The above test was performed 5 times for each example, and the average value was recorded. The results are shown in Table 1. Moreover, the image which image | photographed the state after oily solid waste sample adhering about each example is shown to FIG.

[Oil solid waste removal test]
After performing the above-mentioned oily solid waste adhesion test, the oily solid waste removal test was continuously performed as follows. As shown in FIG. 5A, on the hard flat surface G made of plastic, the pressure-sensitive adhesive sheet roll 30 of the test cleaner 10 ′ is perpendicular to the cylindrical axis direction, and the lower end of the pressure-sensitive adhesive sheet roll 30 is the above-mentioned The end on the handle 52 side of the gripping member 50 is turned up and down with the jig J so that the height is 5 cm from the hard flat surface G (height indicated by the symbol h in FIG. 5A). Fixed to be free. A spacer (not shown) was disposed between the lower end of the pressure-sensitive adhesive sheet roll 30 and the hard flat surface G, and the test cleaner 10 ′ was held at the above height. And the said spacer was extracted from between the adhesive sheet roll 30 and the hard flat surface G, and as shown in FIG.5 (b), the adhesive sheet roll 30 side of the test cleaner 10 'was dropped. More specifically, it was dropped in the direction of arrow A in FIG. The weight W4 (g) of the test cleaner 10 ′ after dropping is measured, and the oil solid waste sample dropout amount W5 after dropping is calculated from the difference from the weight W3 of the test cleaner 10 ′ before dropping measured in advance. (W5 (g) = W3-W4) was determined. And the formula:
A _D (%) = W5 / (W3-W0) × 100
, Oily solid waste sample dropout rate _AD (%) was determined. In each example, W3 and W1 were the same value. The above test was performed 5 times for each example, and the average value was recorded. The results are shown in Table 1.

[180 degree peel strength]
The pressure-sensitive adhesive sheet according to each example was cut into 200 mm × 20 mm to prepare a rectangular test piece. The adhesive surface (adhesive surface) of the test piece was attached to a stainless steel (SUS304) plate by reciprocating a 2 kg roller and held in an environment of 23 ° C. and RH 50% for 30 minutes. In accordance with JIS Z0237, the peel strength against SUS 180 degrees (N / 20 mm) was measured in an environment of 23 ° C. and RH 50% under conditions of a peel angle of 180 degrees and a tensile speed of 300 mm / min. The measurement was performed using “Tensilon” manufactured by Shimadzu Corporation. The results are shown in Table 1.

Table 1, as shown in FIGS. 6-8, Example 1, oily solid waste sample adhering amount _{A C} in oily solid debris adhesion test is 200 g / ^{m 2} or more (more specifically 600 g / ^{m 2} or more) Indicated. In contrast, in Examples 2 and 3, the oily solid waste samples deposition amount _{A C} showed less than 200 g / ^{m 2.} From these results, it can be seen that the pressure-sensitive adhesive cleaner according to Example 1 is excellent in oily solid waste capturing ability. Further, in Example 1, the oily solid waste sample removal rate _AD in the oily solid waste removal test was 10% or less (more specifically, 1% or less). On the other hand, in Examples 2 and 3, the oily solid waste sample drop-off rate _AD exceeded 10%. From these results, it can be seen that the adhesive cleaner according to Example 1 firmly holds the captured oily solid waste, and the occurrence of inconveniences such as the captured oily solid waste falling off in the middle can be suppressed or prevented. .

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

DESCRIPTION OF SYMBOLS 10 Adhesive cleaner 15 Cleaner main member 20 Holding member 30 Adhesive sheet roll 31 Adhesive sheet (solid waste capture part)
32 Adhesive layer 32A Adhesive surface 36 Support base material 40 Rolling member 50 Holding member 52 Handle 100 Oily solid waste sample

Claims

An adhesive cleaner used to remove solid waste having an oily component on its surface,
It comprises a solid waste catcher that captures the solid waste,
The solid waste capturing part has an adhesive surface constituted by an adhesive,
Here, the sticky surface is attached to an oily solid waste sample obtained by adding 5 parts by weight of edible oil to 100 parts by weight of the aggregate to an aggregate having a center particle diameter of 1.20 to 1.50 mm. in oily solid debris adhesion test for determining the amount, oily solid waste samples deposition amount a C per tacky surface 1 m 2 exhibits a 200 g / m 2 or more, adhesive cleaner.
In the oily solid waste removal test in which the adhesive cleaner to which the oily solid waste sample adheres falls on a hard surface from a height of 5 cm, the oily solid waste sample removal rate AD indicates 10% or less. Item 2. The adhesive cleaner according to Item 1.
The adhesive cleaner according to claim 1 or 2, wherein the adhesive surface exhibits a 180 degree peel strength of less than 10 N / 20 mm.
The pressure-sensitive adhesive cleaner according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive contains an acrylic polymer in a proportion of 50% by mass or more.
The pressure-sensitive adhesive cleaner according to claim 4, wherein the pressure-sensitive adhesive is formed from a pressure-sensitive adhesive composition containing the acrylic polymer and a crosslinking agent.
The solid waste capturing part is configured as a single-sided pressure-sensitive adhesive sheet comprising a sheet-like support base material and a pressure-sensitive adhesive layer that is disposed on one surface of the support base material and constitutes the adhesive surface. The adhesive cleaner according to any one of claims 1 to 5.
The adhesive cleaner according to claim 6, wherein the single-sided adhesive sheet is configured as an adhesive sheet roll by being wound with the adhesive layer facing outward.
The pressure-sensitive adhesive cleaner according to claim 7, further comprising a cylindrical rolling member, wherein the pressure-sensitive adhesive sheet roll is disposed on an outer peripheral surface of the rolling member.
The adhesive cleaner according to claim 8, further comprising a gripping member that rotatably supports the rolling member.