Sheet body

Abstract

To provide a sheet body capable of excellently preventing snow accretion and ice accretion even when an angle formed by a surface of the sheet body and a plane is small.SOLUTION: A sheet body includes a first resin layer, the first resin layer containing at least one resin component and at least one oil component, the oil component being capable of bleeding from the first resin layer when the temperature lowers to a predetermined value or less. The sheet body includes a first face, a modulus of elasticity of the first face is equal to or greater than 0.14 MPa, and an amount of oil on the first face is greater than 0 μg / cm2 and equal to or less than 70 μg / cm2 after the sheet body is left to stand at -20°C for 16 hours.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 the study by the present inventors, in order to prevent snow and ice from accumulating, the angle between the surface of the sheet body and the plane must be steep, and if the angle is low, there is a problem that the function of preventing snow and ice from accumulating is insufficient.

[0007] The present invention has been made in consideration of the above-mentioned conventional situation, and its problem to be solved is to provide a sheet body that can effectively prevent snow and ice from accumulating even when the angle between the surface of the sheet body and a plane is low. [Means for solving the problem]

[0008] As a result of extensive research to solve the above problems, the inventors focused on the surface elastic modulus of the first surface of the sheet body and the amount of surface oil after leaving it standing under specific conditions, and completed the present invention.

[0009] That is, the present invention relates to the following. <1> A sheet body including a first resin layer, the first resin layer contains at least one resin component and at least one oil component, the oil component is capable of bleeding from the first resin layer when the temperature drops below a predetermined value; The sheet body includes a first surface, the first surface having a surface elastic modulus of 0.14 MPa or more, and a surface oil amount of 0 μg / cm after being left standing in a −20° C. environment for 16 hours. 2 Greater than 70 μg / cm 2 The following is a sheet body. <2> one of the surfaces of the first resin layer forms the first surface of the sheet body; <1> The sheet body according to claim 1. <3> Further comprising a second resin layer, the second resin layer is in contact with the first resin layer, one of the surfaces of the second resin layer forms the first surface of the sheet body; <1> The sheet body according to claim 1. <4> The oil component has a hydrophilic group. <1> The sheet body according to claim 1. <5> the hydrophilic group includes at least one selected from the group consisting of a hydroxy group, a carboxy group, an amino group, a sulfo group, an ether group, an ester group, and a carbinol group; <4> The sheet body according to claim 1. <6> Further comprising an adhesive layer, <1> ~ <5> 1. The sheet body according to claim 1 , [Effects of the Invention]

[0010] The sheet body of the present invention can effectively prevent snow and ice from adhering even when the angle between the surface of the sheet body and a plane is small. [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. 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] A sheet according to an embodiment of the present invention is a sheet comprising a first resin layer, the first resin layer containing at least one resin component and at least one oil component, the oil component being capable of bleeding from the first resin layer when the temperature drops to a predetermined value or lower, the sheet comprising a first surface, the first surface having a surface elastic modulus of 0.14 MPa or higher, and a surface oil amount of 0 μg / cm after standing in a −20° C. environment for 16 hours. 2 Greater than 70 μg / cm 2 The following is the result.

[0014] In this specification, the first surface of a sheet body refers to the surface with the largest area among the multiple surfaces contained in the sheet body (also referred to as the "main surface" in this specification), and refers to the surface from which at least oil bleeds after being left to stand in a -20°C environment for 16 hours. When the sheet body is a layered product composed of multiple layers, the main surface generally refers to the surface perpendicular to the thickness direction of the layered product. When the sheet body includes a substrate, the first surface is determined when the substrate is removed from the sheet body, and the surface in contact with the substrate does not form the first surface.

[0015] <Sheet configuration> As shown in Fig. 1, the sheet body 1 according to the embodiment of the present invention includes a first resin layer 11, and one of the surfaces of the first resin layer 11 can form the first surface of the sheet body 1. More specifically, the first surface of the sheet body 1 shown in Fig. 1 is the main surface that is not in contact with the substrate 10, out of the two main surfaces of the sheet body 1. The first surface of the sheet body 1 shown in Fig. 1 is formed by one of the surfaces of the first resin layer 11. 2, the sheet body 1 according to the embodiment of the present invention further includes a second resin layer 12 in addition to the first resin layer 11, and the second resin layer 12 is in contact with the first resin layer 11, and one of the surfaces of the second resin layer 12 can form the first surface of the sheet body 1. More specifically, the first surface of the sheet body 1 shown in FIG. 2 is the main surface that is not in contact with the substrate 10, out of the two main surfaces of the sheet body 1. The first surface of the sheet body 1 shown in FIG. 2 is formed by one of the surfaces of the second resin layer 12.

[0016] (1) First resin layer The sheet member 1 according to the embodiment of the present invention includes a first resin layer 11. The first resin layer 11 contains at least one resin component and at least one oil component. When the sheet member 1 does not include a second resin layer 12 described later, one of the surfaces of the first resin layer 11 forms the first surface of the sheet member 1.

[0017] The thickness of the first resin layer 11 is not particularly limited, but in order to allow the oil to bleed appropriately, 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.

[0018] [Resin component] The first resin layer 11 contains at least one resin component.

[0019] The resin component 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.

[0020] 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).

[0021] 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-U KE-9710-U KE-742-U KE-752-U KE-762-U KE-772-U KE-782-U KE-850-U, KE-870-U, KE-880-U, KE-890-U, KE-9590-U, KE-5590-U, KE-5 -UK、KE-582-UK、KE-552B-U、KE-555-UK、KE-575-UK、KE-541-UK、KE-551-UK、KE-56 1-U, KE-571-U, KE-581-U, KE-520-U, KE-530B-2-U, KE-540B-2-U, KE-1551 -UK、KE-1571-UK、KE-152-UK、KE-174-UK、KE-3601SB-UK、KE-3711-UK、KE-3801M-U KE-5612G-U KE-5620BL-U KE-5620W-U KE-5634-U KE-7511-U KE-7 -UK KE-765-UK KE-785-UK KE-7008-UK KE-7005-UK KE-503-UK KE-5042-UK KE- 505-U, KE-6801-U, KE-136Y-U mount Recommendation of the LIMS(Liquid Measurement Monitoring System). )(From KEG-2000-40A / B, KEG-2000-50A / B, KEG-2000-60A / B, KEG-2000-70A / B、KEG-2001-40A / B、KEG-2001-50A / B、KE-1950-10A / B、KE-1950-20A / B、K E-1950-30A / B、KE-1950-35A / B、KE-1950-40A / B、KE-1950-50A / B、KE-1950- 60A / B、KE-1950-70A / B、KE-1935A / B、KE-193185A / B、KE-1987A / B、KE-1988 A / B, KE-2019-40A / B, KE-2019-50A / B, KE-2019-60A / B, KE-2017-30A / B, KE- 2017-40A / B、KE-2017-50A / B、KE-2090-40A / B、KE-2090-50A / B、KE-2090-6 0A / 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.

[0022] [Oil ingredients] The first resin layer 11 contains at least one type of oil component (hereinafter also referred to as "first oil component"). Furthermore, the first resin layer 11 can contain a second oil component in addition to the first 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, KF99 series, KF50 series, KF54 series, KF410 series, KF412 series, KF414 series, FL series, KF-6000, KF-6001, KF-6002, KF-6003, etc.), and silicone oils manufactured by Momentive Corporation (e.g., Element14*PDMS series, TSF404 series, TSF410 series, TSF4300 series, TSF431 series, TSF433 series, TSF437 series, etc.). silicone oils manufactured by Toray Dow Corning Co., Ltd. (for example, 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, BY-16-201, 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 preferably contains a low-temperature phase-separable oil component that, for example, phase-separates from the first oil component and bleeds from the first resin layer when the temperature drops below a predetermined value. The second oil component preferably 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 at least one selected from the group consisting of a hydroxy group, a carboxy group, an amino group, a sulfo group, an ether group (e.g., 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., BY-16-201, 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 ... 62C, 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] [Content of ingredients] The content of the resin component 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 sheet member 1 according to the embodiment of the present invention may further include a second resin layer 12. When the sheet member 1 includes the second resin layer 12, the second resin layer 12 is in contact with the first resin layer 11, and one of the surfaces of the second resin layer 12 forms a first surface of the sheet member 1.

[0033] The second resin layer 12 is a resin layer that can bleed oil components that have bled from the first resin layer 11 onto the first surface of the sheet body 1, and the bled oil components can prevent ice and / or snow from adhering.

[0034] The thickness of the second resin layer 12 is not particularly limited, but is preferably 750 μm or less, more preferably 200 μm or less, even more preferably 100 μm or less, and particularly preferably 50 μm or less so that oil components can easily permeate to the surface of the second resin layer 12, in other words, so that oil permeability to the second resin layer 12 is ensured. From the viewpoint of strength, the thickness is preferably 10 μm or more, and more preferably 30 μm or more.

[0035] [Resin component] The second resin layer 12 contains at least one resin component. Examples of the resin component include the same resin components as those described above for the first resin layer 11.

[0036] [Oil ingredients] The second resin layer 12 may contain at least one oil component. Examples of the oil component include the first oil component and the second oil component described above for the first resin layer 11, preferably the same as the first oil component.

[0037] [Content of ingredients] The content of the resin component 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 resin component is not particularly limited and may be 100% by mass. When an oil component is contained, the content of the resin component can be, for example, 70% by mass or less, based on the total mass of the second resin layer to be finally formed.

[0038] When an oil component is contained, the content 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 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. The content of the oil component can also be 0% by mass based on the total mass of the second resin layer that is finally formed, in which case the second resin layer does not contain the oil component.

[0039] (3) Resin and oil component characteristics As the first oil component, second oil component, and resin component described above, it is preferable to select a combination that satisfies the following properties 1) and 2), for example.

[0040] 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.

[0041] 2) The first oil component has affinity for the resin 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 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.

[0042] More specifically, the second oil component has no affinity for the resin component 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 from the resin component.

[0043] 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 resin component. In other words, the second oil component does not bleed from the resin component.

[0044] 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 resin component. In other words, the second oil component functions as a low-temperature phase-separable oil component that phase-separates from the first oil component.

[0045] For example, when the above relationships 1) and 2) are satisfied, the second oil component is compatible with the first oil component at a temperature that does not require bleeding of the second oil component, and therefore does not bleed from the surface of the first resin layer 11 or the second resin layer 12. 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 bleeds from one of the surfaces of the first resin layer 11 or one of the surfaces of the second resin layer 12 that form the first surface of the sheet member 1, and can function as a bleedable, low-temperature phase-separable oil component.

[0046] 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.

[0047] 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 oil component can be measured as a function of shear rate using a rotational viscometer.

[0048] (4) Base material The sheet member 1 according to this embodiment can further include a substrate 10 . The substrate 10 can be used to support the first 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. As described above, when the sheet body 1 includes the substrate 10, the first surface is determined when the substrate 10 is removed from the sheet body 1, and the surface in contact with the substrate 10 does not form the first surface.

[0049] The substrate 10 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.

[0050] The substrate 10 is preferably formed as an oil-impermeable resin layer to prevent outflow of oil components from the first resin layer 11. The oil-impermeable substrate 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, and polyolefin resin (polyethylene, polypropylene, etc.).

[0051] (5) Adhesive layer The sheet member 1 according to this embodiment may further include an adhesive layer. The adhesive layer can be used to adhere the first resin layer 11 and the like to various adherends.

[0052] The 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.

[0053] In order to prevent oil components from leaking from the first resin layer 11, an oil-impermeable resin layer may be formed using an adhesive layer in place of the oil-impermeable substrate 10, or together with the oil-impermeable substrate 10.

[0054] 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.

[0055] When the oil-impermeable resin layer is formed by the adhesive layer, it is not necessary to make the substrate 10 oil-impermeable. Therefore, if there is no problem with strength, etc., the substrate 10 can be omitted. In this case, the adhesive layer is provided on the surface of the first resin layer 11 opposite to the surface that contacts the second resin layer 12.

[0056] Furthermore, instead of or together with the substrate 10 and the adhesive layer, an oil-impermeable resin layer may be further provided between the first resin layer 11 and the substrate 10. The oil-impermeable resin layer may be disposed between the substrate 10 and the adhesive layer. The material of the oil-impermeable resin layer is not particularly limited, but the same material as the oil-impermeable substrate 10 may be used.

[0057] The adhesive layer is provided to adhere the first resin layer 11 etc. to various adherends, and therefore, for example, an adhesive tape or the like may be used instead of the adhesive layer.

[0058] (6) Separator The sheet member 1 according to this embodiment may further include a separator. The separator can be appropriately selected depending on the material of the pressure-sensitive adhesive layer, etc. The separator is not particularly limited, but for example, a film 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.

[0059] 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.

[0060] (7) Fabrication of the sheet body The method for producing a sheet member according to the embodiment of the present invention is not limited.

[0061] In the case where one of the surfaces of the first resin layer 11 forms the first surface of the sheet member 1, for example, first, the first resin layer 11 is produced using a resin component and an oil component. Next, for example, the substrate 10, the adhesive layer, and the separator are provided on the first resin layer 11 using a conventionally known process. The substrate 10 is adhered, for example, with an adhesive, to the surface opposite to the surface of the first resin layer 11 that forms the first surface of the sheet member 1. The adhesive layer is provided on the surface of the substrate 10 opposite to the first resin layer 11, etc. Thereafter, a separator is attached in a peelable manner to the outer surface of the adhesive layer.

[0062] On the other hand, in the case where one of the surfaces of the second resin layer 12 forms the first surface of the sheet body 1, for example, first, the first resin layer 11 is produced using a resin component and an oil component, and then the second resin layer 12 is produced on this first resin layer 11 using a resin component and, if necessary, an oil component. Next, for example, the substrate 10, a pressure-sensitive adhesive layer, and a separator are provided on the laminate of the first resin layer 11 and the second resin layer 12 using a conventionally known process. The substrate 10 is bonded, for example, with an adhesive to the surface of the first resin layer 11 opposite to the second resin layer 12. The pressure-sensitive adhesive layer is provided on the surface of the substrate 10 opposite to the first resin layer 11, etc. Thereafter, a separator is attached in a peelable manner to the outer surface of the pressure-sensitive adhesive layer.

[0063] (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 first resin layer bleeds sufficiently from the second 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 second resin layer / thickness of first resin layer

[0064] (surface elastic modulus) In the sheet, the surface elastic modulus of the first surface is 0.14 MPa or more, preferably 0.20 MPa or more, and more preferably 0.40 MPa or more. There is no upper limit to the surface elastic modulus of the first surface, but it can be 5 MPa or less. In a sheet body, if the surface elasticity modulus of the first surface is less than 0.14 MPa, when a snow block comes into contact with the first surface, the weight of the snow block is likely to cause compressive deformation of the layer including the surface that forms the first surface. Here, the smaller the angle between the sheet body surface and the plane, the greater the contribution of the snow block weight to the first surface. Therefore, compressive deformation of the layer including the surface that forms the first surface increases the contact area between the first surface and the snow block, increasing the adhesion force. As a result, it may become impossible to prevent snow and ice accumulation when the angle between the sheet body surface and the plane is small. The surface elastic modulus can be specifically measured by the method described in the Examples.

[0065] There are no particular limitations on the method for adjusting the surface elastic modulus of the first surface. For example, the surface elastic modulus of the first surface can be increased by increasing the crosslink density of the resin component in the layer including the surface that forms the first surface. Alternatively, the surface elastic modulus of the first surface can be increased by increasing the viscosity of the oil component used in the first resin layer and / or the second resin layer.

[0066] (amount of oil on the surface) In the sheet, the amount of oil that bleeds onto the first surface after being left standing in a −20° C. environment for 16 hours is divided by the surface area of ​​the first surface (also referred to as “surface oil amount” in this specification). 2 Greater than 70 μg / cm 2 5 μg / cm or less 2 More than 50μg / cm 2 Less than 10 μg / cm is preferred 2 More than 45μg / cm 2 Less than 13 μg / cm is more preferable. 2 More than 30μg / cm 2 The following is even more preferred: The amount of oil on the first surface after leaving it at -20°C for 16 hours was 0 μg / cm 2 When the surface oil amount is 70μg / cm, snow blocks or ice attached to the first surface cannot be removed by its own weight. 2If this is exceeded, there is a risk that excessive amounts of oil will be carried away with the falling snow and ice. The amount of surface oil can be specifically measured by the method described in the Examples.

[0067] (Freezing power) The force required to move a snow block attached to the first surface (adhesion force) is 0.020 N / cm 2 Less than is preferable, and the smaller the better. The value of the freezing strength can be specifically measured by the method described in the Examples.

[0068] As described above, the present specification discloses the following: [1] A sheet body including a first resin layer, the first resin layer contains at least one resin component and at least one oil component, the oil component is capable of bleeding from the first resin layer when the temperature drops below a predetermined value; The sheet body includes a first surface, the first surface having a surface elastic modulus of 0.14 MPa or more, and a surface oil amount of 0 μg / cm after being left standing in a −20° C. environment for 16 hours. 2 Greater than 70 μg / cm 2 The following is a sheet body. [2] The sheet body according to [1], wherein one surface of the first resin layer forms the first surface of the sheet body. [3] Further comprising a second resin layer, the second resin layer is in contact with the first resin layer, The sheet body according to [1], wherein one surface of the second resin layer forms the first surface of the sheet body. [4] The sheet member according to any one of [1] to [3], wherein the oil component has a hydrophilic group. [5] The sheet member according to [4], wherein the hydrophilic group includes at least one selected from the group consisting of a hydroxy group, a carboxy group, an amino group, a sulfo group, an ether group, an ester group, and a carbinol group. [6] The sheet according to any one of [1] to [5], further comprising a pressure-sensitive adhesive layer. [Example]

[0069] 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.

[0070] [Example 1] <Production of sheet body> (Preparation of first resin layer) Resin components: KE-1935A (manufactured by Shin-Etsu Chemical Co., Ltd.), KE-1935B (manufactured by Shin-Etsu Chemical Co., Ltd.) (both resin components are collectively referred to as "KE-1935" in this specification), oil component 1: KF-96-1000CS (manufactured by Shin-Etsu Chemical Co., Ltd.), and oil component 2: KF-6001 (manufactured by Shin-Etsu Chemical Co., Ltd.) were prepared.

[0071] The above-mentioned resin components KE-1935A (20% by mass), KE-1935B (20% by mass), oil component 1 (50% by mass), and oil component 2 (10% by mass) were mixed at 25°C and 101 kPa. The resulting mixture was stirred with a spatula at approximately 120 rpm for 60 seconds, and then stirred with a Disper (Primix Corporation, Labo-Lution) at 2000 rpm for 5 minutes to obtain a paint.

[0072] The obtained coating material was uniformly applied to a polyethylene ionomer film (Himilan (registered trademark) 1855, manufactured by Kurabo Industries, Ltd.) using an applicator, and then heat-cured in an environment of 150°C for 3 minutes to form a first resin layer with a thickness of 250 μm.

[0073] (Preparation of second resin layer) Resin components: KE-1935A (manufactured by Shin-Etsu Chemical Co., Ltd.) and KE-1935B (manufactured by Shin-Etsu Chemical Co., Ltd.) were prepared. The above resin components, KE-1935A (50% by mass) and KE-1935B (50% by mass), were mixed at 25°C and 101 kPa. The resulting mixture was stirred with a spatula at approximately 120 rpm for 60 seconds, and then stirred with a Disper (manufactured by Primix Corporation, Labo-Lution) at 2000 rpm for 5 minutes to obtain a coating material.

[0074] The obtained coating material was applied uniformly onto the first resin layer using an applicator and then heat-cured in an environment of 150°C for 3 minutes to form a second resin layer having a thickness of 100 μm, thereby obtaining the sheet body of Example 1. In the sheet member of Example 1, one of the surfaces of the second resin layer forms the first surface of the sheet member.

[0075] [Examples 2 to 5], [Comparative Examples 1 to 8] Sheet bodies of Examples 2 to 5 and Comparative Examples 1 to 8 were produced in the same manner as Example 1, except that the paint components and the contents of each component were as shown in Table 1. The sheets of Comparative Examples 1 and 8 did not have a second resin layer formed thereon, and one of the surfaces of the first resin layer formed the first surface of the sheet body. In Table 1, the notation "-" in the column for each component indicates that the component was not used.

[0076] Other resin components and oil components in the table are as follows: KF96-50CS: Silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd.) BY-16-201: Silicone oil (manufactured by Toray Dow Corning Co., Ltd.)

[0077] [Table 1]

[0078] <Evaluation> (surface elastic modulus) An atomic force microscope (Oxford Instruments, product name "Jupiter XR") was used, and a silicon cantilever (Nanoworld, product name "SD-R150-FM", tip curvature radius: 150 nm, spring constant: 3 N / m) was attached to the atomic force microscope. The cantilever attached to the atomic force microscope was pressed against the first surface of the sheet at a trigger point of 0.02 V and a scan rate of 2 Hz, and then pulled away. The resulting force curve was fitted to the JKR theoretical formula to calculate the surface elastic modulus. The surface elastic modulus was measured at a depth of 20 μm from the sample surface. 2 Measurements were taken at three points and the average value was calculated. The results are shown in Table 2.

[0079] (Surface oil amount: initial) A sheet cut to a size of 10 cm x 2 cm near the center was left at -20°C for 16 hours. The oil that bled onto the surface of the oil-containing resin layer of the sheet was collected using a cell scraper (CSS-10, manufactured by Kenis Co., Ltd.) at each temperature environment of -20°C, and the oil was absorbed until no change in the weight (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 weight of the oil blotting paper before and after absorbing the oil was divided by the surface area of ​​the oil-containing resin layer to determine the amount of surface oil. The test was performed three times, and the average value was calculated. The term "oil-containing resin layer" as used herein refers to the layer that forms the first surface, and corresponds to the second resin layer in the sheets of Examples 1 to 5 and Comparative Examples 2 to 7, and to the first resin layer in the sheets of Comparative Examples 1 and 8. The "surface" of the oil-containing resin layer refers to the surface of the oil-containing resin layer that forms the main surface of the sheet. The results are shown in Table 2.

[0080] (Freezing power: initial) A formwork with an inner diameter of 10 cm x 10 cm x 10 cm was placed on the first surface of the sheet body that had been left to stand at -10°C for 2 hours. Artificial snow was poured onto it using a sieve, and the formwork was then removed and left to stand at -10°C for 1 hour. After that, a snow block was pressed parallel to the floor surface using a load cell (IMADA Co., Ltd. DPU-50, snow block contact area: 10 cm x 10 cm) at a speed of 45 mm / min. The applied load was measured with a force gauge (IMADA Co., Ltd. ZTS-50N). The maximum measured load was measured within an installation area of ​​100 cm. 2 The value obtained by dividing by 1 was recorded as the freezing strength. The test was performed three times and the average value was calculated.

[0081] From the obtained average values, the freezing strength was determined as follows. A (good): The average adhesion strength is 0.020 N / cm 2 was less than B (bad): The average adhesion strength is 0.020 N / cm 2 That was all The results are shown in Table 2.

[0082] Here, "adhesion" refers to the adhesion of ice or snow to an object, and the maximum force required to separate a snow block from the first surface of the sheet is expressed as the "adhesion force." If we assume that a cubic snow block is attached to an inclined surface with a certain inclination angle (Θ), the force with which the snow block slides down due to its own weight (snow sliding force) is expressed by the following formula. m×g×sinΘ (In the formula, m is the mass of the snow block, and g is the acceleration due to gravity.) From this formula, the snow cube has a side length of 10 cm and a density of 0.3 g / cm 3 , gravitational acceleration 9.8m / s 2 , assuming a slope angle of 45 degrees, the sliding force is 0.020 N / cm 2 The average adhesion strength is estimated to be 0.020 N / cm 2 If it is less than this, it will be possible for a snow block on a 45 degree slope to slide down under its own weight.

[0083] (Adhesion strength: after durability test) Using a xenon weather meter accelerated weathering test device (manufactured by Suga Test Instruments Co., Ltd., model NX25), the test was carried out under conditions conforming to JIS K 7350-2 (illuminance: 60 W / m 2 (light source: xenon lamp, wavelength range: 300 to 400 nm, black panel temperature: 63° C.) The following cycles 1 and 2 were repeated on the first surface of the sheet body, and a test was carried out for 250 hours. Cycle 1: UV irradiation only for 108 minutes Cycle 2: UV irradiation and water spray for 12 minutes

[0084] After the accelerated weather resistance test, the freezing strength test was conducted again in the same manner as in the above "Freezing strength: initial state". The results are shown in Table 2.

[0085] (Snow sliding property: early) The sheet was placed on a horizontal experimental table with the first surface facing upward and left to stand at −10°C for 2 hours. Artificial snow (density: 0.14 g / cm) was then poured onto the first surface of the sheet from above. 3 ) was allowed to fall. The snowfall was stopped when the snow height on the sheet reached 20 cm. The test table was tilted and held at a 45-degree angle, and the presence or absence of snow sliding was visually observed. Based on the observation results, the snow sliding properties were judged as follows: A (Good): Snow sliding was observed within 60 minutes of tilting. B (Poor): No snow sliding was observed within 60 minutes of tilting. The results are shown in Table 2.

[0086] (Snow sliding property: after durability test) Using a xenon weather meter accelerated weathering test device (manufactured by Suga Test Instruments Co., Ltd., model NX25), the test was carried out under conditions conforming to JIS K 7350-2 (illuminance: 60 W / m 2 (light source: xenon lamp, wavelength range: 300 to 400 nm, black panel temperature: 63° C.) The following cycles 1 and 2 were repeated on the first surface of the sheet body, and a test was carried out for 250 hours. Cycle 1: UV irradiation only for 108 minutes Cycle 2: UV irradiation and water spray for 12 minutes

[0087] After the accelerated weather resistance test, the snow sliding property test was conducted again in the same manner as in the above "Snow sliding property: initial stage". The results are shown in Table 2.

[0088] [Table 2]

[0089] From the results shown in Table 2, it was found that the sheets of Examples 1 to 5, which have a surface elastic modulus on the first surface of the sheet body and an amount of surface oil after being left standing under specific conditions within a specified range, showed good results in the evaluation of adhesion strength and snow sliding properties, and can effectively prevent snow and ice from adhering even when the angle between the sheet body surface and the plane is low. [Industrial Applicability]

[0090] The sheet body of the present invention can effectively prevent snow and ice from adhering even when the angle between the surface of the sheet body and a plane is small, and can therefore be used as a surface covering material to prevent snow and ice from adhering to the surfaces of objects such as aircraft, railways, automobiles, wind turbines, houses, traffic lights, and signs. [Explanation of symbols]

[0091] 1 sheet body 10 Base material 11 First resin layer 12 Second resin layer

Claims

1. A sheet body including a first resin layer, the first resin layer contains at least one resin component and at least one oil component, the oil component is capable of bleeding from the first resin layer when the temperature drops below a predetermined value; The sheet body includes a first surface, the first surface having a surface elastic modulus of 0.14 MPa or more, and an amount of surface oil of 0 μg / cm after standing in a −20° C. environment for 16 hours. ２ Greater than 70 μg / cm ２ The following is a sheet body.

2. The sheet body according to claim 1 , wherein one of the surfaces of the first resin layer forms the first surface of the sheet body.

3. Further comprising a second resin layer, the second resin layer is in contact with the first resin layer, The sheet body according to claim 1 , wherein one surface of the second resin layer forms the first surface of the sheet body.

4. The sheet member according to claim 1 , wherein the oil component has a hydrophilic group.

5. The sheet member according to claim 4 , wherein the hydrophilic group includes at least one selected from the group consisting of a hydroxy group, a carboxy group, an amino group, a sulfo group, an ether group, an ester group, and a carbinol group.

6. The sheet member according to any one of claims 1 to 5, further comprising a pressure-sensitive adhesive layer.

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