Sheet body

Abstract

To provide a sheet body with suppressed drainage of oil components even when oil components having hydrophilic group are used, and also with excellent icing and / or snow accretion prevention function.SOLUTION: A sheet body includes a first resin layer including a first resin and a second resin layer including a second resin. wherein the first resin layer includes at least one kinds of oil components selected from a first oil component and a second oil component, and a formula (1a) and a formula (2a) are satisfied, or a formula (1b) and a formula (2b) are satisfied. A / B≥1.75 (1a), C / D≥1 (2a), A / B≥1.65 (1b), C / D≥4.2 (2b) (A: a content ratio of the first resin in the first resin layer, B: a content ratio of the second resin in the second resin layer, C: a content ratio of the first oil component in the first resin layer, D: a content ratio of the second oil component in the first resin layer).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sheet body, and more particularly to a sheet body used as a surface covering material for preventing snow and ice from adhering to the surfaces of objects such as aircraft, trains, automobiles, wind power generators, houses, traffic lights, and signs. [Background technology]

[0002] The adhesion of ice to the surface of objects (icing) and snowflakes due to snowfall (snow accretion) are the cause of a great deal of damage and obstructions in a variety of fields. For example, icing on aircraft wings, snow and ice on the underside of locomotives, snow on automobile headlights, icing on wind turbine blades, and snow and ice on traffic lights can impede the operation, driving, and safety of these vehicles. Furthermore, snow and ice accumulation on residential roofs, signs, etc. can cause damage to these structures and injury to people due to falling snow.

[0003] Conventionally, in various industrial fields, various sheets containing oil have been developed as a measure to prevent snow and ice from accumulating on the surfaces of such objects.

[0004] For example, Patent Document 1 discloses an anti-icing and snow adhesion sheet that consists of an insulating layer made of a sponge material and a surface layer laminated on the insulating layer, the surface layer being formed from rubber or resin in which an oil agent is dispersed so that it can bleed out. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-148879 Summary of the Invention [Problem to be solved by the invention]

[0006] Various oil components are used in the sheet body disclosed in Patent Document 1. However, according to studies by the present inventors, when an oil component having a hydrophilic group is used, there is a problem that the oil component may flow out of the sheet body together with water during rainfall, etc.

[0007] The present invention has been made in consideration of the above-mentioned conventional situation, and aims to provide a sheet body that minimizes oil component outflow even when an oil component having a hydrophilic group is used, and that has excellent anti-icing and / or anti-snowing properties. [Means for solving the problem]

[0008] As a result of extensive research into solving the above problems, the inventors of the present invention focused on the resin content and oil content in each layer of the sheet body, and completed the present invention.

[0009] That is, the present invention provides the following <1> ~ <8> It is related to. <1> A sheet body having a first resin layer containing a first resin and a second resin layer containing a second resin, the first resin layer is laminated on one surface of the second resin layer, the first resin layer contains at least one oil component selected from the group consisting of a first oil component and a second oil component, the second oil component contains a low-temperature phase-separating oil component that has a hydrophilic group and is capable of seeping out of the first resin layer when the temperature drops to a predetermined value or lower; A sheet body in which the following formula (1a) and formula (2a) are satisfied, or the following formula (1b) and formula (2b) are satisfied: The content ratio (mass%) of the first resin in the first resin layer / the content ratio (mass%) of the second resin in the second resin layer ≧1.75 (1a) The content ratio (mass%) of the first oil component in the first resin layer / the content ratio (mass%) of the second oil component in the first resin layer ≧1 (2a) The content ratio (mass%) of the first resin in the first resin layer / the content ratio (mass%) of the second resin in the second resin layer ≧1.65 (1b) The content ratio (mass%) of the first oil component in the first resin layer / the content ratio (mass%) of the second oil component in the first resin layer is 4.2 (2b). <2> the second resin layer contains a fourth oil component, the fourth oil component has a hydrophilic group and contains a low-temperature phase-separating oil component that can pass through the second resin layer and exude from the first resin layer when the temperature drops to a predetermined value or lower. <1> The sheet body according to claim 1. <3> the content of the fourth oil component in the second resin layer is 48% by mass or less; <2> The sheet body according to claim 1. <4> At least one of the hydrophilic group of the second oil component and the hydrophilic group of the fourth oil component is a hydroxy group, a carboxy group, an amino group, a sulfo group, an ether group, an ester group, or a carbinol group. <2> The sheet body according to claim 1. <5> The content of the first resin is 40 to 99 mass % based on the mass of the entire first resin layer. <1> ~ <4> 1. The sheet body according to claim 1 , <6> The content of the first oil component is 1 to 60 mass% based on the total mass of the first resin layer. <1> ~ <5> 1. The sheet body according to claim 1 , <7> The content of the second oil component is 0.01 to 20% by mass based on the total mass of the first resin layer. <1> ~ <6> 1. The sheet body according to claim 1 , <8> The thickness of the first resin layer is 50 μm or more. <1> ~ <7> 1. The sheet body according to claim 1 , [Effects of the Invention]

[0010] The sheet of the present invention exhibits little oil component outflow even when an oil component having a hydrophilic group is used, and has an excellent anti-icing and / or anti-snowing function. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram showing an example of a layer structure of a sheet member of the present invention. [Figure 2] 1 is a diagram showing an example of a layer structure of a sheet member of the present invention. [Figure 3] 1 is a diagram showing an example of a layer structure of a sheet member of the present invention. [Figure 4] 1 is a diagram showing an example of a layer structure of a sheet member of the present invention. [Figure 5] FIG. 1 is a schematic diagram of a Gakushin-type abrasion tester used in the examples. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, the embodiments of the present invention will be described in more detail, but the present invention is not limited to the following embodiments.

[0013] 1. Sheet structure As shown in FIG. 1, the sheet member 1 of the present invention has a second resin layer 11 and a first resin layer 12 laminated on one surface of the second resin layer 11. The sheet member 1 of the present invention may further include, for example, a substrate 13 provided on the surface of the second resin layer 11 opposite to the surface on the first resin layer 12 side, an adhesive layer 14 provided on the surface of the substrate 13 opposite to the surface on which the second resin layer 11 is provided, and a separator 15 releasably attached to the outer surface of the adhesive layer 14. When using the sheet member 1 of the present invention, the separator 15 is peeled off to expose the adhesive layer 14, which can then be adhered to various structures (not shown).

[0014] (1) First resin layer The first resin layer 12 is a resin layer laminated on one side of the second resin layer 11, and contains a first resin and at least one oil component selected from the group consisting of a first oil component and a second oil component.

[0015] The thickness of the first resin layer 12 is not particularly limited, but is preferably 750 μm or less so that oil components can easily penetrate to the surface of the first resin layer 12, in other words, to ensure oil permeability to the first resin layer 12, and is preferably 50 μm or more from the standpoint of strength.

[0016] <First Resin> The first resin layer 12 preferably has higher abrasion resistance than the second resin layer 11, and by doing so, the surface of the second resin layer 11 can be protected.

[0017] Furthermore, it is preferable that the first resin layer 12 does not hinder the function of preventing ice and / or snow accumulation caused by oil components accumulated in the second resin layer 11. In other words, it is preferable that the first resin layer 12 has oil permeability that allows the oil components exuded from the second resin layer 11 to permeate to the surface opposite to the second resin layer 11.

[0018] The first resin is not particularly limited, but examples thereof include silicone resin, polyurethane resin, polyurethane acrylic resin, vinyl chloride resin, polyester resin, elastomers, fluororesin, polyamide resin, polyolefin resin (polyethylene, polypropylene, etc.), acrylic resin, etc., and among these, crosslinked silicone resin is preferred from the viewpoint of excellent bleeding effect of oil components and durability against outdoor exposure.

[0019] As the silicone resin, any appropriate silicone resin can be adopted as long as it does not impair the effects of the present invention. The silicone resin may be one type only, or two or more types. Such a silicone resin may be a condensation type silicone resin or an addition type silicone resin. Furthermore, such a silicone resin may be a one-component silicone resin that dries alone (for example, a one-component room temperature vulcanizable (RTV) resin), or a two-component silicone resin (for example, a two-component room temperature vulcanizable (RTV) resin).

[0020] Examples of silicone resins include one-component RTV rubbers manufactured by Shin-Etsu Chemical Co., Ltd. (e.g., KE-3423, KE-347, KE-3475, KE-3495, KE-4895, KE-4896, KE-1830, KE-1884, KE-3479, KE-348, KE-4897, KE-4898, KE-1820, KE-1825, KE-1831, KE-1833, KE-1885, KE-1056, KE-1151, KE-1842, KE-1886, KE-3424G, KE-3494, KE-3490, KE-40RTV, KE-4890, etc.). , KE-3497, KE-3498, KE-3493, KE-3466, KE-3467, KE-1862, KE-1867, KE-3491, KE-3492, KE-3417, KE-3418, KE-3427, KE-3428, KE-41, KE-42, KE-44, KE-45, KE-441, KE-445, KE-45S, etc.), two-component RTV rubber manufactured by Shin-Etsu Chemical Co., Ltd. (e.g., KE-1800T-A / B, KE-66, KE-1031-A / B, KE-200, KE-118, KE-103, KE-108, KE-119, KE-109 E-A / B, KE-1051J-A / B, KE-1012-A / B, KE-106, KE-1282-A / B, KE-1283-A / B, KE-1800-A / B / C, KE-1801-A / B / C, KE-1802-A / B / C, KE-1281-A / B, KE-1204- A / B, KE-1204-AL / BL, KE-1280-A / B, KE-513-A / B, KE-521-A / B, KE-1285-A / B, KE-1861-A / B, KE-12, KE-14, KE-17, KE-113, KE-24, KE-26, KE-1414, KE- 1415, KE-1416, KE-1417, KE-1300T, KE-1310ST, KE-1314-2, KE-1316, KE-1600, KE-117603-A / B, KE-1606, KE-1222-A / B, KE-1241, etc.), silicone sealants manufactured by Shin-Etsu Chemical Co., Ltd. (e.g., KE-42AS, KE-420, KE-450, etc.), rubber compounds manufactured by Shin-Etsu Chemical Co., Ltd. (e.g., KE-655-U, KE-675-U, KE-931-U, KE-941-U, KE-951-U, KE-961-U, KE-971-U,KE-981-U, KE-961T-U, KE-971T-U, KE-871C-U, KE-9410-U, KE-9510-U, KE -9610-UK、KE-9710-UK、KE-742-UK、KE-752-UK、KE-762-UK、KE-772-UK、KE-782-U KE-850-UK, KE-870-UK, KE-880-UK, KE-890-UK, KE-9590-UK, KE-5590-UK, KE-5 2-UK KE-582-UK KE-552B-U KE-555-U KE-575-U KE-541-U KE-551-U KE- 561-U, KE-571-U, KE-581-U, KE-520-U, KE-530B-2-U, KE-540B-2-U, KE-1 551-U, KE-1571-U, KE-152-U, KE-174-U, KE-3601SB-U, KE-3711-U, KE-380 1M-U, KE-5612G-U, KE-5620BL-U, KE-5620W-U, KE-5634-U, KE-7511-U, KE- 7611-UK KE-765-UK KE-785-UK KE-7008-UK KE-7005-UK KE-503-UK KE-5042- U. KE-505-U, KE-6801-U, KE-136Y-U) is an indicator of the LIMS (limited graphical monitoring system). Liquids) (Specify KEG-2000-40A / B, KEG-2000-50A / B, KEG-2000-60A / B, KEG-2 000-70A / B、KEG-2001-40A / B、KEG-2001-50A / B、KE-1950-10A / B、KE-1950- 20A / B、KE-1950-30A / B、KE-1950-35A / B、KE-1950-40A / B、KE-1950-50A / B KE-1950-60A / B KE-1950-70A / B KE-193185A / B KE-1987A / B KE-1988A / B、KE-2019-40A / B、KE-2019-50A / B、KE-2019-60A / B、KE-2017-30A / B、KE-2 017-40A / B、KE-2017-50A / B、KE-2090-40A / B、KE-2090-50A / B、KE-2090-60 A / B, KE-2090-70A / B, KE-2096-40A / B, KE-2096-50A / B, KE-2096-6OA / B.Examples of usable silicones include the LR7665 series manufactured by Asahi Kasei Wacker Silicone Co., Ltd., the LR3033 series manufactured by Asahi Kasei Wacker Silicone Co., Ltd., the TSE3032 series manufactured by Momentive Corporation, and Sylgard 184 manufactured by Toray Dow Corning Co., Ltd.

[0021] The first resin may be the same as the second resin described later, but in order to improve abrasion resistance, it is preferable that the ratio of the first resin contained in the first resin layer 12 is set to a value significantly larger than the ratio of the second resin contained in the second resin layer 11.

[0022] <Oil ingredients> The first resin layer 12 contains at least one oil component selected from the group consisting of a first oil component and a second oil component.

[0023] As the first oil component, for example, silicone oil, fluorine oil, hydrocarbon oil, polyether oil, ester oil, phosphorus compound oil, mineral oil, etc. can be used.

[0024] Examples of silicone oils include silicone oils manufactured by Shin-Etsu Chemical Co., Ltd. (e.g., KF96L series, KF96 series, KF69 series, KF99 series, KF50 series, KF54 series, KF410 series, KF412 series, KF414 series, FL series, KF-6000, KF-6001, KF-6002, KF-6003, etc.), silicone oils manufactured by Momentive Corporation (e.g., Element14*PDMS series, TSF404 series, TSF410 series, TSF4300 series, TSF431 series, TSF433 series, TS F437 series, TSF4420 series, TSF4421 series, etc.), silicone oils manufactured by Toray Dow Corning Co., Ltd. (e.g., BY16-846 series, SF8416 series, SF8427 series, SF-8428 series, SH200 series, SH203 series, SH230 series, SF8419 series, FS1265 series, SH510 series, SH550 series, SH710 series, FZ-2110 series, FZ-2203 series, BY16-201, etc.), silicone oils manufactured by Wacker Asahi Kasei Silicone Co., Ltd. (WACKER (registered trademark) SILICONE Wacker (registered trademark) SILICONE FLUID AK series, Wacker (registered trademark) SILICONE FLUID AP series, Wacker (registered trademark) SILICONE FLUID AR series, Wacker (registered trademark) SILICONE FLUID AS series, Wacker (registered trademark) TN series, Wacker (registered trademark) L series, Wacker (registered trademark) AF series, etc. can be used.

[0025] The second oil component contains a low-temperature phase-separable oil component that can, for example, phase-separate from the first oil component and exude from the first resin layer when the temperature drops below a predetermined value, and has a hydrophilic group. The above-mentioned predetermined value or less means, for example, freezing point (0°C) or less.

[0026] Examples of the hydrophilic group include a hydroxy group, a carboxy group, an amino group, a sulfo group, an ether group (for example, a polyether group such as a polyoxyethylene group), an ester group, and a carbinol group.

[0027] As the second oil component, for example, silicone oil, fluorine oil, hydrocarbon-based oil, polyether-based oil, ester-based oil, phosphorus compound-based oil, mineral oil, etc. can be used.

[0028] Examples of silicone oils include silicone oils manufactured by Toray Dow Corning Co., Ltd. (e.g., BY16-201, etc.), silicone oils manufactured by Shin-Etsu Chemical Co., Ltd. (e.g., KF-6000, KF-6001, KF-6002, KF-6003, KF-6011, KF-6011P, KF-6043, PAM-E, KF-8010, X-22-161A, X-22-161B, KF-8012, KF-8008, X-22-1660B-3, X-22-9409, X-22-4952, X-22-4272, KF-6123, X-22-16 2C, X-21-5841, KF-9701, KF-864, KF-865, KF-868, KF-859, KF-393, KF-860, KF-880, KF-8004, KF-8002, KF-8005, KF-867, KF-8021, KF-869, KF-861, X-22-3939A, X-22-4039, X-22-4015, X-22-3701E, X-22-173BX, X-22-173DX, X-22-176F, X-22-176DX, X-22-176GX-A, X-22-3710, etc.) can be used. In addition, oils having a hydrophilic group at the end or on the side chain can be used.

[0029] The content of the first resin can be set to preferably 40% by mass or more, more preferably 50% by mass or more, and even more preferably 60% by mass or more, based on the total mass of the first resin layer to be finally formed, and preferably 99% by mass or less, more preferably 90% by mass or less, and even more preferably 80% by mass or less, based on the total mass of the first resin layer to be finally formed.

[0030] The content of the first oil component can be set to preferably 1% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more, based on the total mass of the first resin layer to be finally formed. The content of the first oil component can be set to preferably 60% by mass or less, more preferably 50% by mass or less, and even more preferably 30% by mass or less, based on the total mass of the first resin layer to be finally formed.

[0031] The content of the second oil component can be set to preferably 0.01% by mass or more, more preferably 1% by mass or more, and even more preferably 5% by mass or more, based on the total mass of the first resin layer to be finally formed. The content of the second oil component can be set to preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less, based on the total mass of the first resin layer to be finally formed.

[0032] (2) Second resin layer The second resin layer 11 contains a second resin. The second resin layer 11 preferably contains a third oil component and a fourth oil component. The second resin layer 11 is a resin layer that can bleed a portion of the oil contained therein, for example, the fourth oil component, from the second resin (more specifically, bleed from the second resin layer through the first resin layer onto the surface of the first resin layer), and the bled oil component can prevent ice and / or snow from adhering.

[0033] The thickness of the second resin layer 11 is not particularly limited, but in order to allow the oil to properly exude, it is preferably 10,000 μm or less, more preferably 5,000 μm or less, even more preferably 2,500 μm or less, and particularly preferably 2,000 μm or less. From the viewpoint of strength, the thickness is preferably 10 μm or more, more preferably 50 μm or more, even more preferably 100 μm or more, and particularly preferably 200 μm or more.

[0034] <Second resin> The second resin may be, for example, the same as the first resin described above.

[0035] <Oil ingredients> The second resin layer 11 preferably contains a third oil component and a fourth oil component.

[0036] The third oil component may be the same as the first oil component described above. The fourth oil component may be the same as the second oil component described above.

[0037] The fourth oil component preferably contains a low-temperature phase-separable oil component that, when the temperature drops below a predetermined value, can phase-separate from the third oil component, pass through the second resin layer, and exude from the first resin layer, and also preferably has the above-mentioned hydrophilic group. The above-mentioned predetermined value or less means, for example, freezing point (0°C) or less.

[0038] The content of the second resin is preferably 30% by mass or more, more preferably 35% by mass or more, and even more preferably 40% by mass or more, based on the total mass of the second resin layer to be finally formed. The upper limit of the content of the second resin is not particularly limited and is set appropriately in relation to the oil component, but can be, for example, 70% by mass or less, based on the total mass of the second resin layer to be finally formed.

[0039] The content of the third oil component can be set to preferably 10% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more, based on the total mass of the second resin layer to be finally formed. There is no particular upper limit to the content of the third oil component, but it can be set to preferably 65% ​​by mass or less, more preferably 50% by mass or less, even more preferably 40% by mass or less, particularly preferably 30% by mass or less, and most preferably 20% by mass or less, based on the total mass of the second resin layer to be finally formed.

[0040] The content of the fourth oil component is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more, based on the total mass of the second resin layer to be finally formed. The upper limit of the content of the fourth oil component is not particularly limited, but can be set to preferably 48% by mass or less, more preferably 45% by mass or less, even more preferably 40% by mass or less, particularly preferably 35% by mass or less, and most preferably 30% by mass or less, based on the total mass of the second resin layer to be finally formed.

[0041] (3) Resin and oil component characteristics As the first oil component, the second oil component, and the first resin, it is preferable to select a combination that satisfies the following properties 1) and 2).

[0042] 1) The first oil component and the second oil component are compatible and do not phase separate at temperatures that do not require bleeding of the second oil component, for example, room temperature of about 20°C to 80°C, which is significantly higher than a predetermined value such as the freezing point. On the other hand, the first oil component and the second oil component phase separate in a temperature environment that requires bleeding of the second oil component, for example, a temperature below a predetermined value such as the freezing point.

[0043] 2) The first oil component has affinity for the first resin both at temperatures that do not require bleeding of the second oil component and at temperatures that require bleeding of the second oil component. In contrast, the second oil component changes its behavior in the presence of the first oil component depending on whether the temperature is one that does not require bleeding of the second oil component or one that requires bleeding of the second oil component.

[0044] More specifically, the second oil component has no affinity for the first resin in the absence of the first oil component, both at temperatures that do not require bleeding of the second oil component and at temperatures that require bleeding of the second oil component. In other words, the second oil component bleeds out of the first resin.

[0045] On the other hand, the second oil component is compatible with the first oil component in the presence of the first oil component at temperatures that do not require bleeding of the second oil component, and therefore has affinity for the first resin. In other words, the second oil component does not bleed out from the first resin.

[0046] In contrast, the second oil component phase-separates from the first oil component at temperatures that require bleeding of the second oil component and has no affinity for the first resin. In other words, the second oil component functions as a low-temperature phase-separable oil component that phase-separates from the first oil component.

[0047] 3) The third oil component and the fourth oil component are compatible and do not phase separate at temperatures that do not require bleeding of the fourth oil component, for example, room temperature of about 20°C to 80°C, which is significantly higher than a predetermined value such as freezing point. On the other hand, the third oil component and the fourth oil component phase separate in a temperature environment that requires bleeding of the fourth oil component, for example, a temperature below a predetermined value such as freezing point.

[0048] 4) The third oil component has affinity for the second resin both at temperatures that do not require bleeding of the fourth oil component and at temperatures that require bleeding of the fourth oil component. In contrast, the behavior of the fourth oil component changes in the presence of the third oil component depending on whether the temperature is one that does not require bleeding of the fourth oil component or one that requires bleeding of the fourth oil component.

[0049] More specifically, the fourth oil component has no affinity for the second resin in the absence of the third oil component, both at temperatures that do not require bleeding of the fourth oil component and at temperatures that require bleeding of the fourth oil component. In other words, the fourth oil component bleeds out of the second resin.

[0050] On the other hand, the fourth oil component is compatible with the third oil component at temperatures that do not require bleeding of the fourth oil component in the presence of the third oil component, and therefore has affinity for the second resin. In other words, the fourth oil component does not bleed out from the second resin.

[0051] In contrast, the fourth oil component phase-separates from the third oil component at temperatures that require bleeding of the fourth oil component and has no affinity for the second resin. In other words, the fourth oil component functions as a low-temperature phase-separable oil component that phase-separates from the third oil component.

[0052] It is also empirically known that the solubility parameter value (SP value) is a guideline for determining the ease of mixing between a solvent and a solute. The relationships between the first oil component, the second oil component, and the first resin, as well as the relationships between the third oil component, the fourth oil component, and the second resin, described above, can also be explained based on the relationship between their solubility parameters. In this specification, the Hansen solubility parameter is used as the solubility parameter. This value can be determined by performing Fourier transform nuclear magnetic resonance spectroscopy analysis on the first oil component, the second oil component, and the first resin, as well as the third oil component, the fourth oil component, and the second resin, to examine the types and molar ratios of the molecular units that make up the molecular structure of each component, and then calculating the Hansen solubility parameter of each molecular unit type weighted by molar ratio.

[0053] The Hansen solubility parameters for each molecular unit type can be calculated using the molecular group contribution method using the software "HSPiP, Hansen SoLubiLity Parameters in Practice ver4" available from the link (https: / / hansen-soLubiLity.com / ). Specifically, each constituent unit of the target substance is entered in SMILES notation, and the HSP value (δ d ,δ p ,δ h ) can be calculated.

[0054] In order to satisfy the above relationships 1) and 2), it is preferable that the difference between the solubility parameter of the first resin and the solubility parameter of the first oil component is set to be smaller than the difference between the solubility parameter of the first resin and the solubility parameter of the second oil component. Also, the difference in solubility parameter between the first oil component and the first resin is set to be 0.6 (J / cm 3 ) 1 / 2 It is preferable to set it within

[0055] In order to satisfy the above relationships 3) and 4), it is preferable that the difference between the solubility parameter of the second resin and the solubility parameter of the third oil component is set to be smaller than the difference between the solubility parameter of the second resin and the solubility parameter of the fourth oil component. The difference in solubility parameter between the third oil component and the second resin is 0.6 (J / cm 3 ) 1 / 2 It is preferable to set it within

[0056] For example, when the above relationships 1) and 2) are satisfied, the second oil component is compatible with the first oil component at temperatures that do not require bleeding of the second oil component, and therefore does not bleed from the surface of the first resin layer 12 or the second resin layer 11. On the other hand, when the temperature changes to a temperature that requires bleeding of the second oil component, the second oil component phase-separates from the first oil component and exudes from the surface of the first resin layer 12 or the second resin layer 11 on the first resin layer 12 side, and can function as a bleedable low-temperature phase-separable oil component.

[0057] Furthermore, for example, when the relationships 3) and 4) above are satisfied, the fourth oil component is compatible with the third oil component at temperatures that do not require bleeding of the fourth oil component, and therefore does not bleed from the surface of the second resin layer 11. On the other hand, when the temperature changes to a temperature that requires bleeding of the fourth oil component, the fourth oil component phase-separates from the third oil component and exudes from the surface of the second resin layer 11 on the side of the first resin layer 12, and can function as a bleedable, low-temperature phase-separable oil component.

[0058] As is clear from the above explanation, the first oil component and the second oil component do not need to be physically distinct, but only need to be distinguished from each other in terms of the functions and actions described above. Therefore, the first oil component and the second oil component do not both need to be composed of a single oil component, and as long as the above conditions are met, each of the first oil component and the second oil component may contain multiple oil components.

[0059] Furthermore, as is clear from the above explanation, the third oil component and the fourth oil component do not need to be physically distinct, but only need to be distinguished from each other in terms of the functions and actions described above. Therefore, the third oil component and the fourth oil component do not both need to be composed of a single oil component, and as long as the above conditions are met, each of the third oil component and the fourth oil component may contain multiple oil components.

[0060] In one embodiment of the sheet member of the present invention, the following formula (1a) and formula (2a) are satisfied. The content ratio (mass%) of the first resin in the first resin layer / the content ratio (mass%) of the second resin in the second resin layer ≧1.75 (1a) The content ratio (mass%) of the first oil component in the first resin layer / the content ratio (mass%) of the second oil component in the first resin layer ≧1 (2a)

[0061] In the following, in this embodiment, "the content ratio (mass%) of the first resin in the first resin layer / the content ratio (mass%) of the second resin in the second resin layer" may be referred to as "resin ratio 1," and "the content ratio (mass%) of the first oil component in the first resin layer / the content ratio (mass%) of the second oil component in the first resin layer" may be referred to as "oil ratio 1."

[0062] When formula (1a) and formula (2a) are satisfied, the content of the first resin in the first resin layer becomes higher than the content of the second resin in the second resin layer, resulting in a sheet body with less second oil in the first resin layer. As a result, even when an oil component having a hydrophilic group is used, it is presumed that a sheet body with excellent ice and / or snow adhesion prevention function can be obtained with little oil component outflow from the second resin layer.

[0063] The resin ratio 1 is preferably 1.80 or more, more preferably 1.85 or more, and even more preferably 1.95 or more. The higher the resin ratio 1, the better, so there is no particular upper limit, but it can be set to, for example, 10.0 or less, preferably 8.0 or less, more preferably 5.0 or less, and particularly preferably 4.0 or less. The oil ratio 1 is preferably 1.05 or more, more preferably 1.1 or more.

[0064] In another embodiment of the sheet member of the present invention, the following formula (1b) and formula (2b) are satisfied. The content ratio (mass%) of the first resin in the first resin layer / the content ratio (mass%) of the second resin in the second resin layer ≧1.65 (1b) The content ratio (mass%) of the first oil component in the first resin layer / the content ratio (mass%) of the second oil component in the first resin layer is 4.2 (2b).

[0065] In the following, in this embodiment, "the content ratio (mass%) of the first resin in the first resin layer / the content ratio (mass%) of the second resin in the second resin layer" may be referred to as "resin ratio 2," and "the content ratio (mass%) of the first oil component in the first resin layer / the content ratio (mass%) of the second oil component in the first resin layer" may be referred to as "oil ratio 2."

[0066] When formula (1b) and formula (2b) are satisfied, the sheet has a high content of the first resin in the first resin layer and a low content of the second oil component in the first resin layer. As a result, even when an oil component having a hydrophilic group is used, it is thought that a sheet can be obtained that has little oil component outflow from the second resin layer and has excellent anti-icing and / or anti-snowing properties.

[0067] The resin ratio 2 is preferably 1.67 or more, more preferably 1.70 or more. The upper limit of the resin ratio 2 can be set to, for example, less than 1.75. The oil ratio 2 is preferably 5.0 or more, more preferably 5.5 or more, and even more preferably 6.0 or more.

[0068] The viscosity of the first oil component is preferably 0.002 to 5.0 (Pa·s), more preferably 0.005 to 3.0 (Pa·s), and even more preferably 0.010 to 1.0 (Pa·s). The viscosity of the second oil component is preferably 0.004 to 0.300 (Pa·s), more preferably 0.010 to 0.200 (Pa·s), and even more preferably 0.010 to 0.100 (Pa·s). The viscosity of the third oil component is preferably 0.002 to 5.0 (Pa·s), more preferably 0.005 to 3.0 (Pa·s), and even more preferably 0.010 to 1.0 (Pa·s). The viscosity of the fourth oil component is preferably 0.004 to 0.300 (Pa·s), more preferably 0.010 to 0.200 (Pa·s), and even more preferably 0.010 to 0.100 (Pa·s). The viscosity of the oil component can be measured specifically by the method described in the examples.

[0069] (4) Base material The base material 13 can be used to support the second resin layer 11 and the like to ensure the strength of the sheet body 1, and also to make the sheet body 1 easier to handle.

[0070] The substrate 13 is not particularly limited, but examples that can be used include polyurethane resin, polyurethane acrylic resin, rubber-based resin, vinyl chloride resin, polyester resin, silicone resin, elastomers, fluororesin, polyamide resin, polyolefin resin (polyethylene, polypropylene, etc.), metal plate or metal foil (aluminum, copper, silver, iron, nickel, tin, stainless steel, etc.), etc.

[0071] The substrate 13 is preferably formed as an oil-impermeable resin layer to prevent outflow of oil components from the second resin layer 11. The oil-impermeable substrate is not particularly limited, but examples thereof include polyurethane resin, polyurethane acrylic resin, rubber-based resin, vinyl chloride resin, polyester resin, silicone resin, elastomers, fluororesin, polyamide resin, and polyolefin resin (polyethylene, polypropylene, etc.).

[0072] (5) Adhesive layer The adhesive layer 14 can be used to adhere the second resin layer 11 and the like to various adherends.

[0073] The adhesive layer 14 is not particularly limited, but examples thereof include acrylic resin adhesives, epoxy resin adhesives, amino resin adhesives, vinyl resin (such as vinyl acetate polymers) adhesives, curable acrylic resin adhesives, and silicone resin adhesives.

[0074] In order to prevent oil components from leaking from the second resin layer 11, an oil-impermeable resin layer may be formed using an adhesive layer 14 in place of or together with the oil-impermeable substrate 13.

[0075] The oil-impermeable adhesive layer is not particularly limited, but examples thereof include acrylic resin adhesives, epoxy resin adhesives, amino resin adhesives, vinyl resin (such as vinyl acetate polymers) adhesives, curable acrylic resin adhesives, and silicone resin adhesives.

[0076] When the oil-impermeable resin layer is formed by a pressure-sensitive adhesive layer, it is not necessary to make the substrate 13 oil-impermeable. Therefore, if there is no problem with strength, etc., the substrate 13 can be omitted as shown in Figure 2. In this case, the pressure-sensitive adhesive layer 14 is provided on the other surface opposite to the one surface of the second resin layer 11.

[0077] 3, instead of the substrate 13 and the adhesive layer 14, or as shown in FIG. 4, an oil-impermeable resin layer 16 may be further provided between the second resin layer 11 and the substrate 13. Although not specifically shown, in FIG. 4, the oil-impermeable resin layer 16 may be disposed between the substrate 13 and the adhesive layer 14. The material of the oil-impermeable resin layer 16 is not particularly limited, but the same material as that of the oil-impermeable substrate 13 may be used.

[0078] The adhesive layer 14 is provided to adhere the second resin layer 11 etc. to various adherends, so it goes without saying that, for example, an adhesive tape or the like may be used instead of the adhesive layer 14.

[0079] (6) Separator The separator 15 can be appropriately selected depending on the material of the pressure-sensitive adhesive layer 14. There are no particular limitations on the separator 15, but for example, films made of polyurethane resin, polyurethane acrylic resin, rubber-based resin, vinyl chloride resin, polyester resin, silicone resin, elastomers, fluororesin, polyamide resin, polyolefin resin (polyethylene, polypropylene, etc.), etc. can be used.

[0080] In order to improve releasability, the surface of the separator may be subjected to a release treatment using an appropriate release agent such as a silicone-based release agent, a long-chain alkyl-based release agent, an olefin-based release agent, a fluorine-based release agent, a fatty acid amide-based release agent, molybdenum sulfide, or silica powder.

[0081] (7) Fabrication of the sheet body The method for producing the sheet of the present invention is not limited. For example, first, the second resin layer 11 is produced using a resin component and an oil component, and then the first resin layer 12 is produced on the second resin layer 11 using a resin component and an oil component.

[0082] Next, for example, a substrate 13, a pressure-sensitive adhesive layer 14, and a separator 15 are provided on the laminate of the second resin layer 11 and the first resin layer 12 using a conventionally known process. The substrate 13 is adhered to the surface of the second resin layer 11 opposite to the first resin layer 12, for example, with an adhesive. The pressure-sensitive adhesive layer 14 is provided on the surface of the substrate 13 opposite to the second resin layer 11, etc. Thereafter, the separator 15 is attached to the outer surface of the pressure-sensitive adhesive layer 14 in a peelable state.

[0083] (8) Characteristics of the sheet (thickness ratio) In the sheet member of the present invention, the ratio of the thickness of the first resin layer to the thickness of the second resin layer (thickness ratio), calculated based on the following formula, is preferably 0.75 or less, more preferably 0.5 or less, so that the oil component of the second resin layer bleeds sufficiently from the first resin layer. Furthermore, from the viewpoint of strength, the thickness ratio is preferably 0.05 or more, more preferably 0.1 or more. Consequently, from the viewpoints of the amount of oil bleed and strength, the thickness ratio is preferably 0.05 to 0.75, more preferably 0.1 to 0.5. Thickness ratio = thickness of first resin layer / thickness of second resin layer

[0084] (amount of oil on the surface) At 20°C, the amount of oil bleeding onto the surface of the first resin layer (surface oil amount) is set to 40 μg / cm to prevent unnecessary bleeding. 2 It is preferable that it is less than 10 ... In addition, the amount of oil that bleeds onto the surface of the first resin layer at 0°C and -20°C (amount of oil on the surface) is set to 40 μg / cm to prevent ice and snow from adhering. 2 It is preferable that the concentration is 300 μg / cm or more. 2 More preferably, it is equal to or greater than this. However, even if the thickness is outside the above range, the sheet body can still be used. The amount of surface oil can be specifically measured by the method described in the Examples.

[0085] (wear resistance) For the first resin layer, a water-resistant abrasive was applied at 125 g / cm2 The reduction rate of the first resin layer when it is reciprocated 100 times under a pressing force of 100 mm / s at a speed of 100 mm / s is preferably less than 80 mass%, more preferably less than 50 mass%, and even more preferably less than 20 mass%, so that it can withstand outdoor use. However, even if the thickness is outside the above range, the sheet body can still be used. The reduction rate of the first resin layer can be measured specifically by the method described in the examples.

[0086] (Icing power) In a -20°C environment, the force required to move ice blocks attached to the first resin layer (freezing force) is 1.0 N / cm 2 Less than is preferable, and the smaller the better. However, even if the thickness is outside the above range, the sheet body can still be used. The ice adhesion force can be measured specifically by the method described in the examples. [Example]

[0087] The present invention will be explained in more detail below by way of examples, but the present invention is not limited to the following examples in any way.

[0088] [Example 1] <Production of sheet body> (Preparation of second resin layer) The resin component: KE1935A / B (manufactured by Shin-Etsu Chemical Co., Ltd.), the third oil component: dimethylsiloxane oil (manufactured by Shin-Etsu Chemical Co., Ltd., product number: KF-96 50cs), the fourth oil component: carbinol-modified oil (manufactured by Toray Dow Corning Co., Ltd., BY16-201, containing hydroxyl groups), and the additives were mixed in a mass ratio of 39.6:47.6:11.8:1.

[0089] The additive used was a mixture of methyl hydrogen silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd., product number: KF-99), a reaction retarder (manufactured by Shin-Etsu Chemical Co., Ltd., product number: Seigyozai No. 6-10), and a platinum catalyst (manufactured by Shin-Etsu Chemical Co., Ltd., product number: CAT-PL-50T) in a mass ratio of 0.1:0.8:0.1.

[0090] The obtained mixture was applied to a PET sheet (Lumirror S10#75, manufactured by Toray Industries, Inc.) using an applicator and cured by heating in an environment of 150°C for 3 minutes to form a second resin layer with a thickness of 250 μm.

[0091] (Preparation of first resin layer) The resin component: KE1935A / B (manufactured by Shin-Etsu Chemical Co., Ltd.), the first oil component: dimethylsiloxane oil (manufactured by Shin-Etsu Chemical Co., Ltd., product number: KF-96 50cs), the second oil component: carbinol-modified oil (manufactured by Toray Dow Corning Co., Ltd., BY16-201, containing hydroxyl groups), and the additives were mixed in a mass ratio of 66:33:0:1.

[0092] The additives used were the same as those used in the second resin layer.

[0093] The obtained mixture was applied onto the second resin layer using an applicator and cured by heating in an environment of 150° C. for 3 minutes to form a first resin layer having a thickness of 50 μm, and a sheet body was obtained.

[0094] <Evaluation> The oil used and the resulting sheet were evaluated as follows, and the results are shown in Table 6.

[0095] (viscosity of oil components) The viscosity as a function of shear rate was measured using a rotational viscometer (Thermo Fisher Scientific, HAAKE). The shear rate was increased from 0.1 to 1,000 [1 / s] in 30 seconds, and then decreased from 1,000 to 0.1 [1 / s] in 30 seconds, and the change in stress was measured. The viscosity value at a shear rate of 1.0 [1 / s] during the shear rate increase was used. A parallel plate (diameter 35 mm) was used as the measurement jig. The gap between the plates was set to 0.024 mm. The measurement temperature was set to 20°C by the temperature control unit.

[0096] (Thickness and thickness ratio) The thickness of each of the first resin layer and the second resin layer was measured using a film thickness meter MFC-101 (manufactured by Nikon Corporation). Using the thicknesses measured by this method, the thickness ratio was calculated based on the following formula. Thickness ratio = thickness of first resin layer / thickness of second resin layer The thickness ratio was 0.2 in all cases.

[0097] (Phase separation and compatibility, etc.) a) Phase separation and compatibility between the "third oil component" and the "fourth oil component" in response to temperature changes, b) affinity between the "third oil component" and the "resin component of the second resin layer" in response to temperature changes, and c) affinity between the "fourth oil component" and the "resin component of the second resin layer" in response to temperature changes were evaluated.

[0098] However, the direct objects of analysis were the mixture of the "third oil component" and the "fourth oil component" extracted from the second resin layer, and the oil component exuded from the surface of the second resin layer. The second resin layer was obtained by scraping off the first resin layer from the sheet body.

[0099] To evaluate the above a), the second resin layer was first immersed in toluene (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) at 20°C for 24 hours to extract the third oil component and the fourth oil component as a mixture. The third oil component and the fourth oil component in the mixture were separated using liquid layer chromatography.

[0100] The extracted mixture of the third oil component and the fourth oil component was measured for "transmittance at 20°C, 500 nm" and "transmittance at 3°C, 500 nm," and based on the percentage of the difference between these values ​​relative to "transmittance at 20°C, 500 nm," it was determined whether the mixture was "phase separated (not compatible)" or "compatible (not phase separated)."

[0101] The evaluation criteria are as follows: ◯: The difference in transmittance was 10% or more (phase separation occurred in response to temperature changes (not compatible)). ×: The difference in transmittance was less than 10% (they were miscible (not phase separated) in response to temperature changes).

[0102] The transmittance was measured using an ultraviolet-visible spectrophotometer (JASCO Corporation, V-750) with a measurement wavelength of 500 nm, a scan speed of 1000 nm / min, and a stirring speed of 400 rpm, and the sample was left to stand for 10 minutes at either 20°C or 3°C. The reference air was air.

[0103] Regarding the above b), first, an oil-containing resin layer was prepared by adding only the third oil component to the second resin layer from which each oil component had been extracted. The oil-containing resin layer was placed in an environment of 20°C and in an environment of 3°C, and evaluated based on whether or not the third oil component oozed from the surface of the oil-containing resin layer.

[0104] The evaluation criteria are as follows: ◯: The third oil component exuded at both 20°C and 3°C. ×: The third oil component did not exude at either 20°C or 3°C.

[0105] Regarding c), the evaluation was carried out in the same manner as in b), except that the fourth oil component was used instead of the third oil component.

[0106] (amount of oil on the surface) The measurement was performed to measure the amount of oil that bled onto the surface of the first resin layer at 20° C., 0° C. (freezing point), and −20° C. During the measurement, it was confirmed that the bled oil was mainly the second oil component.

[0107] The amount of surface oil was measured by the following method. The sheet was cut into a 10cm x 2cm size near the center and left for 16 hours at temperatures of 20°C, 0°C, and -20°C. The oil that bled onto the surface of the first resin layer under each temperature environment was collected using a cell scraper (Kenis Co., Ltd., CSS-2510), and the oil was absorbed using oil blotting paper until no change in the mass (oil absorption amount) of the oil blotting paper was observed. The process of collecting oil using the cell scraper and absorbing it with the oil blotting paper was repeated seven times per minute. The difference in mass of the oil blotting paper before and after absorbing the oil was taken as the surface oil amount. The test was performed three times, and the average value was calculated.

[0108] The evaluation criteria are as follows: ○: Surface oil amount is 40μg / cm 2 More than 300μg / cm 2 It was less than. ×: Surface oil amount is 40 μg / cm 2 It was less than.

[0109] (wear resistance) The abrasion resistance of the first resin layer was evaluated. The measurement device used was a Gakushin-type abrasion tester (model number: RT-300S, manufactured by Daiei Scientific Instruments Manufacturing Co., Ltd.). A schematic diagram of the tester is shown in Figure 5. The Gakushin-type abrasion tester 20 includes a test stand 21, a support plate 22 fixed to the test stand 21 with screws 22a or the like, and a friction element 25 (size: 2 cm x 2 cm) located above the support plate 22 and below a cantilever-shaped load arm 24 to which a weight 23 is applied.

[0110] Using this Gakushin-type abrasion tester 20, a test piece 32 was attached to a support plate 22 via an adhesive 31 (manufactured by Nitto Denko Corporation, No. 5000NS) on the first resin layer, particularly in a 20 mm × 120 mm area, of the test piece 32. A water-resistant abrasive 33 with a grit size of #120 was attached to the underside of the friction element 25 via the adhesive 31, and the abrasive was applied with a pressure of 125 g / cm2 adjusted by the weight 23 and the load arm 24. 2 The reduction rate of the first resin layer was determined when the sheet was reciprocated 100 times under a pressing force of 100 mm / s at a speed of 100 mm / s. The room temperature was set to 20°C.

[0111] The evaluation criteria are as follows: ⊚: The reduction rate was less than 10% by mass. Good: The reduction rate was 10% by mass or more and less than 80% by mass. ×: The reduction rate was 80% by mass or more.

[0112] (Icing power) The object of measurement is the force required to move an ice block attached to the first resin layer in an environment of -20°C, and for convenience, the magnitude of this force is defined in this specification as the "icing force."

[0113] The ice adhesion force was measured by the following method. First, a cylindrical ice block was created by placing a stainless steel ring (inner diameter 25 mm) on the bottom of a 16-inch square polystyrene case (manufactured by AS ONE Corporation), pouring 6 g of pure water into it, and freezing it at -20°C for at least 16 hours. After freezing, the stainless steel ring was removed.

[0114] Next, the sheet body was left to stand in a −20° C. environment for 16 hours, and then attached to a stainless steel plate placed parallel to the floor surface, with the first resin layer facing outward. 2 The cylindrical ice block was attached to the surface.

[0115] The ambient temperature was set to -20°C. Three hours after the ice block was attached, the ice block was pressed parallel to the floor surface with a load cell (IMADA Corporation DPU-50, attachment jig A-4) at a speed of 0.1 mm / s in a -20°C environment. The load applied over a 40-second period was measured with a force gauge (IMADA Corporation ZTS-50N). The maximum load measured was 0.1 mm / s for an attachment area of ​​4.9 cm. 2 The value obtained by dividing by this was recorded as the ice adhesion force. The test was performed three times and the average value was calculated.

[0116] This measurement method was determined with reference to "Research on Snow and Ice Accretion Prevention Technology (First Report), Hokkaido Prefectural Industrial Research Institute Report No. 292 (1993)." At least at -20°C, the ice adhesion force decreases approximately proportionally in response to an increase in the amount of surface oil.

[0117] The evaluation criteria are as follows: ◎: Ice adhesion force is 0.1N / cm 2 It was less than. 〇: Ice adhesion force is 0.1N / cm 2 More than 1.0N / cm 2 It was less than. ×: Ice adhesion force is 1.0N / cm 2 That was all.

[0118] (water resistance) A sheet (size: 150mm x 150mm) was placed in a rainfall test machine (manufactured by Nishiyama Manufacturing Co., Ltd.), and an amount of water equivalent to the annual rainfall was allowed to fall from above the sheet. The annual rainfall was set to 1600mm based on data from the Japan Meteorological Agency. The test environment temperature was set to 5°C inside the test machine, simulating a rainy winter day, with the rainfall temperature at 5°C, and the rainfall rate at approximately 500mm / hour.

[0119] The first to fourth oil components remaining in the seat body after the rainfall test were extracted, and the reduction rates of the second and fourth oil components before and after the rainfall test were calculated from the change in the ratio of the first to fourth oil components. It has been confirmed that the first and third oil components do not decrease during the rainfall test. The method for extracting the first to fourth oil components in the seat body and the method for calculating the reduction rates (%) of the second and fourth oil components are as follows.

[0120] 1. Cut the sheet into 20mm x 40mm pieces and place them in a screw cap vial. 2. Place approximately 30 g of chloroform in a screw cap vial and seal. 3. Shake the sheet at 100 rpm for 15 hours using a shaker (double action lab shaker SRR-2, manufactured by AS ONE Corporation) to extract any remaining oil from within the sheet. 4. Remove any solids remaining in the screw cap bottle. 5. The chloroform containing the extracted oil is dried in a dryer at 100°C for 2 hours to obtain a mixture of the first to fourth oil components. 6. Place approximately 3 mg of the resulting mixture and approximately 700 mg of deuterated chloroform in a vial to create a mixed solution. 7. Transfer the mixture to an NMR sample tube. 8. NMR (model number: ULTRASHIELD 300, manufactured by BRUKER) 1 H NMR was measured and assigned based on the molecular structure of various second component oils. 9. The reduction rate (%) of the second oil component and the fourth oil component due to ultraviolet irradiation is calculated from the change in the number of hydrogen atoms in Si-CH3 before and after ultraviolet irradiation.

[0121] [Examples 2 to 14, Comparative Examples 1 to 22] A sheet body was produced in the same manner as in Example 1, except that the content of the resin component and the types and contents of the first to fourth oil components in the first resin layer and the second resin layer were as shown in Tables 1 to 5.

[0122] The obtained sheet was used to carry out the same evaluations as in Example 1. The results are shown in Tables 6 to 10.

[0123] In Tables 6 to 10, "resin ratio" means the value of "content ratio (mass%) of first resin in first resin layer / content ratio (mass%) of second resin in second resin layer", and "oil ratio" means the value of "content ratio (mass%) of first oil component in first resin layer / content ratio (mass%) of second oil component in first resin layer".

[0124] Furthermore, the first or third oil component "KF-96-1000" refers to dimethylsiloxane oil manufactured by Shin-Etsu Chemical Co., Ltd., the second or fourth oil component "KF-6002" refers to carbinol-modified oil (containing hydroxyl groups) manufactured by Shin-Etsu Chemical Co., Ltd., and the second or fourth oil component "KF-6003" refers to carbinol-modified oil (containing hydroxyl groups) manufactured by Shin-Etsu Chemical Co., Ltd.

[0125] [Table 1]

[0126] [Table 2]

[0127] [Table 3]

[0128] [Table 4]

[0129] [Table 5]

[0130] [Table 6]

[0131] [Table 7]

[0132] [Table 8]

[0133] [Table 9]

[0134] [Table 10]

[0135] The results in Tables 6 to 10 show that the sheet of the present invention has little oil component outflow even when an oil component having a hydrophilic group is used, and has excellent anti-icing and / or anti-snowing function. [Explanation of symbols]

[0136] 1 sheet body 11 Second resin layer 12 1st resin layer 13 Base material 14 Adhesive layer 15 Separator 16 Oil-impermeable resin layer 20 Gakushin-type abrasion tester 21 Test stand 22 Support plate 22a screw 23 Weight 24 Load arm 25 Friction element 31 Adhesive 32 test specimens 33 Water-resistant polishing pad

Claims

1. A sheet body having a first resin layer containing a first resin and a second resin layer containing a second resin, the first resin layer is laminated on one surface of the second resin layer, the first resin layer contains only the first oil component, or both the first oil component and the second oil component, of the first oil component and the second oil component; the first resin is a silicone resin; the second resin is a silicone resin, the first oil component is a silicone oil, the second oil component contains a low-temperature phase-separating silicone oil component that has a hydrophilic group and is capable of exuding from the first resin layer when the temperature drops to 0°C or lower; the second resin layer contains a fourth oil component, the fourth oil component contains a low-temperature phase-separating silicone oil component that has a hydrophilic group and is capable of passing through the second resin layer and exuding from the first resin layer when the temperature drops to 0°C or lower; At least one of the hydrophilic group of the second oil component and the hydrophilic group of the fourth oil component is a hydroxy group, a carboxy group, an amino group, a sulfo group, an ether group, an ester group, or a carbinol group, A sheet body in which the following formula (1a) and formula (2a) are satisfied, or the following formula (1b) and formula (2b) are satisfied. Content (mass%) of first resin in first resin layer / Content (mass%) of second resin in second resin layer ≧ 1.75 (1a) Content (mass%) of the first oil component in the first resin layer / Content (mass%) of the second oil component in the first resin layer ≧1 (2a) Content (mass%) of first resin in first resin layer / Content (mass%) of second resin in second resin layer ≧ 1.65 (1b) Content (mass%) of the first oil component in the first resin layer / Content (mass%) of the second oil component in the first resin layer ≧4.2 (2b)

2. The sheet member according to claim 1 , wherein the content of the fourth oil component in the second resin layer is 48 mass % or less.

3. 3. The sheet body according to claim 1, wherein the content of the first resin is 40 to 99% by mass based on the mass of the entire first resin layer.

4. The sheet body according to any one of claims 1 to 3, wherein the content of the first oil component is 1 to 60 mass% based on the mass of the entire first resin layer.

5. 5. The sheet body according to claim 1, wherein the content of the second oil component is 0.01 to 20 mass % based on the mass of the entire first resin layer.

6. A sheet body described in any one of claims 1 to 5, wherein the thickness of the first resin layer is 50 μm or more.

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