WO2021131922A1 - マスキングシート及びそれを用いた道路床版の補強方法 - Google Patents

マスキングシート及びそれを用いた道路床版の補強方法 Download PDF

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Publication number
WO2021131922A1
WO2021131922A1 PCT/JP2020/046815 JP2020046815W WO2021131922A1 WO 2021131922 A1 WO2021131922 A1 WO 2021131922A1 JP 2020046815 W JP2020046815 W JP 2020046815W WO 2021131922 A1 WO2021131922 A1 WO 2021131922A1
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Prior art keywords
masking sheet
base layer
masking
sheet
layer
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Ceased
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PCT/JP2020/046815
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English (en)
French (fr)
Japanese (ja)
Inventor
幹郎 細井
晋二 小川
健二 柳原
章弘 福原
奥田　裕一
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Teraoka Seisakusho Co Ltd
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Teraoka Seisakusho Co Ltd
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Priority to JP2021567317A priority Critical patent/JP7282921B2/ja
Publication of WO2021131922A1 publication Critical patent/WO2021131922A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges

Definitions

  • the present invention relates to a masking sheet used when applying a resin composition and a method for reinforcing a road deck using the masking sheet.
  • a masking sheet is attached to a place where the paint of the object to be painted does not want to adhere, and after applying the paint to a desired part, the masking sheet is applied.
  • the paint adheres to the outer surface of the masking sheet, that is, the surface of the masking sheet opposite to the surface to be attached to the object to be coated, in the same manner as the painted portion of the object to be coated.
  • the outer surface of the masking sheet has a property that the adhered paint does not drip and the film after painting does not peel off from the masking sheet. Therefore, it is common to attach and remove the masking sheet for each coating.
  • Patent Document 1 a method of arranging continuous sheets arranged on the lower surface of the deck in a grid pattern has been proposed (Patent Document 1). According to this method, since an exposed portion that is not covered by the continuous fiber sheet is formed on the lower surface of the deck, it is possible to easily observe the state of cracks in concrete, and the presence of the exposed portion makes it possible to easily observe the upper surface of the deck. It is possible to prevent the permeated water from staying between the concrete portion on the lower surface of the deck and the continuous fiber sheet.
  • a method of impregnating the continuous fiber sheet with a curable resin composition and converting it into a fiber reinforced plastic (FPR) material is adopted.
  • FPR fiber reinforced plastic
  • a plurality of continuous fiber sheets are installed in parallel in one direction, and then a plurality of continuous fiber sheets are installed in orthogonal directions to perform the grid-like installation.
  • the applicant is a multi-layer masking sheet in which a plurality of square single-layer masking sheets including a base material and an adhesive layer are laminated, and each single-layer masking sheet faces the first side of the masking sheet base material.
  • the adhesive layer is provided along the outer edge of the second side, and a non-adhesive region is provided in a substantially central portion from a third side different from the first and second sides toward a fourth side facing the first side.
  • Patent Document 2 proposes a multi-layer masking sheet for cornering, which is characterized by the above.
  • This multi-layer masking sheet for cornering is arranged in the non-covered portion when the bands of the reinforcing fibers are arranged in a grid pattern in the road deck reinforcement using the reinforcing fibers, and the coating of the resin composition for curing the reinforcing fibers is performed. At that time, the adhesion of the resin composition to the floor slab is suppressed.
  • This multi-layer masking sheet can be applied to a large number of times with a single corner by sequentially peeling off the upper single-layer sheet after the resin composition is applied. Become. In the masking sheet, a new base material appears on the surface at each coating and is peeled off together with the coated resin composition.
  • a material that does not repel the resin composition for example, paper, cloth, or a film or non-woven fabric made of various synthetic resins, is used as a base material. Therefore, conventionally, it has been necessary to peel off the masking tape between the first coating of the resin composition and the next coating.
  • an object of the present invention is to provide a masking sheet that does not require the masking sheet to be peeled off each time the resin composition is applied or impregnated.
  • a further object of the present invention is to provide a method for reinforcing a floor slab using the masking sheet.
  • the present invention provides a masking sheet in which the number of masking and peeling is only one by laminating a base layer having poor paint adhesion on the adhesive sheet.
  • a masking sheet is provided in which the base layer is arranged on the other end side of the surface of the masking sheet, and the outer surface of the base layer corresponding to the outer surface of the masking sheet is a surface having an ethanol contact angle of 30 ° or more.
  • At least strip-shaped reinforcing fibers are installed on the lower surface of the road deck at predetermined intervals in the first direction and impregnated with resin, and further, the strip-shaped reinforcing fibers are impregnated in the first direction.
  • the above masking sheet is applied to the lattice.
  • a method for reinforcing a road deck is provided, which comprises a step of arranging the shape of the fiber reinforced resin structure in an uncoated portion.
  • the masking sheet of the present invention can repel the resin composition on the outer surface thereof, and the next resin composition can be coated / impregnated without peeling a plurality of times. It can be carried out. As a result, masking and peeling can be completed only once by a road deck reinforcement method or the like, and workability is improved.
  • the masking sheet in masking for painting, the masking sheet (tape) repelling the paint may impair the smoothness of the painted surface, so it has not been adopted. Therefore, a conventional masking sheet for painting has been adopted even when the smoothness of the coated surface of the resin composition is not so required, such as reinforcement of reinforcing fibers. Further, since the masking sheet needs to be peeled off after coating, it is important that the masking sheet can be easily peeled off. However, in the conventional masking sheet, each coating is peeled off before the resin composition is cured. Otherwise, it will be difficult to peel off the resin composition after curing.
  • the resin composition is formed a plurality of times. We have obtained the finding that peeling can be easily performed even when exposed to coating and impregnation of objects.
  • the number of masking and peeling can be performed only once, and the workability is improved.
  • the masking sheet of the present invention is a masking sheet in which at least a base layer and an adhesive sheet having an adhesive layer are laminated, and the adhesive layer is arranged on one end side of the surface of the masking sheet, and the masking is performed.
  • the base layer is arranged on the other end side of the surface of the sheet, and the outer surface of the base layer corresponding to the outer surface of the masking sheet is a masking sheet having an ethanol contact angle of 30 ° or more.
  • the adhesive layer is attached to the adhesive surface to be masked, such as a concrete deck, and the base layer faces the surface of the outer surface of the masking sheet opposite to the adhesive layer.
  • the contact angle of ethanol is 30 ° or more
  • the contact angle of ethanol with respect to the target surface is 30 ° or more.
  • it is referred to as “ethanol contact angle”.
  • the "outer surface of the base layer corresponding to the outer surface of the masking sheet” may be referred to as the “outer surface of the base layer” or simply the “outer surface”.
  • the base layer used for the masking sheet of the present invention may have an ethanol contact angle of 30 ° or more on the exposed surface (outer surface) after being attached to the surface to be attached.
  • materials capable of realizing such properties include silicone resin, silicone rubber, fluorine-based resin, fluorine-based rubber, fluorinated silicone resin, and fluorinated silicone-based rubber. A film of these materials may be used as a base layer.
  • the outer surface of a known film material such as a polyethylene (PE) film, a polyethylene terephthalate (PET) film, or a polypropylene (PP) film is subjected to a mold release treatment using a fluorine-based resin, a silicone-based resin, a silicone-based rubber, or the like. Therefore, the outer surface of the masking sheet can have an ethanol contact angle of 30 ° or more.
  • the ethanol contact angle specified in the present invention was measured by the static drip method in the "wetting property test method for the surface of the substrate glass" of JIS R 3257.
  • the outer surface can repel the adhered resin composition, and even after a plurality of coatings of the resin composition, the outer surface has a thick resin composition.
  • the film of the object is not formed and can be easily peeled off.
  • the higher the contact angle, the better the resilience of the resin composition, and the contact angle is preferably 32 ° or more, more preferably 35 ° or more.
  • the outer surface of the base layer may be roughened by embossing to provide unevenness.
  • the surface roughness (arithmetic mean roughness Ra) of the outer surface of the roughened base layer is preferably 3 ⁇ m or more and 30 ⁇ m or less. Within this range, the roughening effect can be obtained, and the resin composition is less likely to remain in the recesses.
  • the type of fluororesin or fluororubber is not particularly limited, but is polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), polychlorotrifluoroethylene (PCTFE), tetrafluoroethylene.
  • PTFE polytetrafluoroethylene
  • PFA tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer
  • PCTFE polychlorotrifluoroethylene
  • FEP -Hexafluoropropylene copolymer
  • PETFE tetrafluoroethylene-ethylene copolymer
  • PVdF polyvinylidene fluoride
  • vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene copolymer vinylidene fluoride-tetra Fluororesin-containing rubber such as a fluoroethylene copolymer and an ethylene-tetrafluoroethylene copolymer can be used.
  • PTFE polytetrafluoroethylene
  • PFA tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer
  • FEP tetrafluoroethylene-hexafluoropropylene copolymer
  • the type of silicone resin or silicone rubber is not particularly limited, peroxide curing type silicone rubber, addition reaction type silicone rubber, a structure consisting of D units, such as condensation reaction type silicone rubber [(CH 3) 2 SiO] Examples thereof include those in which a functional group is introduced into a long-chain polymer of a polydimethylsiloxane having, if necessary.
  • M unit (R 3 SiO 1/2 ), Q unit (SiO 2 ), T unit (RSiO 3/2 ) and T unit (RSiO 3/2) of peroxide-curable silicone resin, addition reaction type silicone resin, condensation reaction type silicone resin, etc. Includes organopolysiloxanes having at least one unit selected from D units (R 2 SiO).
  • the resin or rubber used as these raw materials may be used alone, or may be a mixture of two or more, or a laminated product thereof. Further, it may be a composite material with another material.
  • Examples of raw materials for silicone-based rubber include KE-1950-10 (A / B), KE-1950-20 (A / B), and KE-1950-30 (A / B) manufactured by Shin-Etsu Chemical Co., Ltd. , KE-1987 (A / B), KE-1988 (A / B), LR7665 series manufactured by Asahi Kasei Wacker Silicone Co., Ltd., LR3033 series, TSE3032 series manufactured by Momentive Co., Ltd. and the like can be used.
  • fluorinated silicone-based release agent examples include modified silicone having a fluorine substituent such as a perfluoroalkyl group or a perfluoropolyether group in the main chain. These are usually bonded with functional groups such as alkenyl groups and hydrosilyl groups that can form a crosslinked structure by reaction (curing).
  • fluorinated silicone-based release agent examples include X-70-201, X-70-258, KP-911 manufactured by Shin-Etsu Chemical Co., Ltd., and FS1265-300CS manufactured by Toray Dow Corning Co., Ltd. , FS1265-1000CS, FS1265-10000CS, BY24-900, BY24-903, SYL-OFF Q-7785, SYL-OFF Q-7795, SYL-OFF Q-7755 and the like.
  • the pressure-sensitive adhesive layer is not particularly limited, and conventionally known pressure-sensitive adhesives such as rubber-based pressure-sensitive adhesives, acrylic-based pressure-sensitive adhesives, epoxy-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, and vinyl ester-based pressure-sensitive adhesives. It is also possible to select from one or more kinds of pressure-sensitive adhesives selected from the group consisting of polyester-based pressure-sensitive adhesives, polymer cement-based pressure-sensitive adhesives, and polyolefin-based pressure-sensitive adhesives.
  • the thickness of the pressure-sensitive adhesive layer is, for example, 5 ⁇ m to 500 ⁇ m, and can be set according to the roughness and curvature of the adhesive surface, workability when peeling the masking sheet, and the like.
  • the pressure-sensitive adhesive sheet has a pressure-sensitive adhesive layer and is laminated with a base layer.
  • the pressure-sensitive adhesive sheet may be composed of only the pressure-sensitive adhesive layer, or may be formed by laminating and integrating one or two or more other layers (hereinafter, referred to as “complementary layer”) and the pressure-sensitive adhesive layer.
  • a conventionally known material such as a resin film such as a polyethylene (PE) film, a polyethylene terephthalate (PET) film, a polypropylene (PP) film, a woven fabric containing a fiber thread, or a knitted fabric can be used.
  • a resin film such as a polyethylene (PE) film, a polyethylene terephthalate (PET) film, a polypropylene (PP) film, a woven fabric containing a fiber thread, or a knitted fabric
  • PET polyethylene terephthalate
  • PP polypropylene
  • the adhesive surface may be protected by a protective sheet (also referred to as a release liner) such as a release paper until just before the masking sheet is used.
  • FIG. 1 shows a schematic cross-sectional view as an example of the masking sheet 5 according to the present invention.
  • FIG. 1A shows a masking sheet 5 in which a base layer 1 is composed of a base material 2 and is laminated and integrated with an adhesive layer 4 which is an adhesive sheet 3.
  • the base material 2 is made of PTFE or the like, and the outer surface 1'is maintained at an ethanol contact angle of 30 ° or more.
  • the base material 2 of the base layer 1 is made of PET or the like, and a silicone resin or the like is applied to the outer surface 1'to make the ethanol contact angle 30 ° or more, and the mold is released.
  • the surface 6 is formed, and the base layer 1 is laminated and integrated with the adhesive sheet 3.
  • the auxiliary layer 7 is arranged on the base material 2 side of the pressure-sensitive adhesive layer 4 in order to increase the thickness of the masking sheet 5 and improve the workability at the time of sticking and peeling. Further, in order to improve the bondability between the complementary layer 7 and the base material 2, the bonding layer 8 is arranged on the contact surface of the base layer 1 with the complementary layer 7. In FIG. 1D, the pressure-sensitive adhesive layer 4 is also arranged between the complementary layer 7 and the bonding layer 8 for the purpose of further increasing the thickness from the configuration of FIG. 1C.
  • FIG. 1 (e) is a configuration in which the same base material 2 as in FIG. 1 (a) is arranged on the outer surface 1'in the configuration of FIG. 1 (d).
  • the outer surface 4'of the pressure-sensitive adhesive layer 4 can be protected by a protective sheet (not shown) or the like before use.
  • a configuration including such a protective sheet (release liner) is also within the scope of the present invention.
  • the protective sheet in order to make the protective sheet easy to peel off, it is preferable that a part of the protective sheet protrudes from the adhesive layer 4.
  • the base layer 1 may be larger than the pressure-sensitive adhesive sheet 3, and a part or all of the side surfaces of the pressure-sensitive adhesive sheet 3 may be covered with the base layer 1.
  • the size of the masking sheet may be any size that matches the area to be masked, and is not particularly limited.
  • a long masking sheet may be wound around the core in a roll shape, or may be standardized into, for example, a quadrangle of 100 mm ⁇ 100 mm according to the shape of the surface to be attached.
  • the shape of the masking sheet is usually a rectangle such as a square because the continuous fiber sheets are orthogonal to each other to reinforce the deck.
  • the shape may be a parallelogram (including a rhombus), a trapezium, or the like.
  • the thickness of the masking sheet is preferably a thickness corresponding to the thickness of the reinforcing fiber material to be laid.
  • the total thickness after integration) is preferably 0.2 mm or more and 5.0 mm or less. More preferably, the thickness is 0.4 mm or more and 2.0 mm or less. If the thickness of the masking sheet is less than 0.2 mm, the masking sheet may be buried in the reinforcing fiber material, making it difficult to peel it off. Further, when the thickness of the masking sheet is larger than 5.0 mm, the trowel or roller used for impregnating the reinforcing fibers with the resin composition may interfere with the masking sheet and the workability may be deteriorated.
  • the manufacturing method of the masking sheet is not particularly limited, but the adhesive sheet can be continuously applied on the base layer by a method such as roll coating, die coating, calendar coating, reverse coating, gravure coating, knife coating and the like. It is also possible to prepare the base layer and the pressure-sensitive adhesive sheet by a known method, and then bond the base layer and the pressure-sensitive adhesive sheet together. Further, the base layer may be formed in a laminated shape by melt-molding pellets as a raw material of the base layer on the base layer side of the pressure-sensitive adhesive sheet.
  • the release-treated surface can be formed by applying the above-mentioned fluorinated silicone, silicone-based resin, or the like to the base material. Further, a silicone-based adhesive or the like is used for the bonding layer, and a commercially available silicone-based primer can be selected for the undercoat layer.
  • FIG. 2 shows the lower surface side of the road deck reinforced by the method according to one embodiment of the present invention.
  • the reinforcing fiber sheet 22 is arranged in a grid pattern on the lower surface of the road deck 21, and the reinforcing fiber sheet 22 is impregnated with the resin composition to form a lattice structure of the reinforcing fiber sheet 22 and adhered to the lattice structure.
  • Reference numeral 23 denotes an exposed portion that is not covered by the continuous fiber sheet.
  • the masking sheet 31 according to the present invention is attached to the exposed portion 23 to perform masking.
  • strip-shaped reinforcing fibers 32 are installed on the lower surface of the road deck at predetermined intervals in the first direction to impregnate the resin, and another strip-shaped reinforcing fiber 33 is added to the first strip-shaped reinforcing fibers 33. It is installed at a predetermined interval in the second direction orthogonal to the direction of the above, impregnated with resin, and a grid-like fiber reinforced resin structure is formed and reinforced.
  • FIG. 4 is a diagram illustrating a floor slab reinforcing step using the masking sheet according to the present invention, and shows a cross-sectional view corresponding to line AA of FIG.
  • the underside of the floor slab is cleaned (base treatment) in the same manner as in the conventional process.
  • the construction range is assigned and marked out, and the masking sheet of the present invention is attached to the exposed portion 23 in FIG. 2 for masking (FIG. 4 (a)).
  • pretreatment such as coating of primer 42, non-landing treatment, and marking out is performed (FIG. 4 (b)
  • the undercoat of the resin composition 43 and the first layer of reinforcing fibers 32 are attached (FIG. 3).
  • Pasting extending in the left-right direction also referred to as "first direction”
  • top coating of the resin composition 43, impregnation of the reinforcing fibers of the resin composition 43, and the like are performed (FIG. 4 (c)).
  • the undercoat of the resin composition 44 and the second layer reinforcing fiber 33 are attached (in the vertical direction (also referred to as “second direction”) in FIG. (Extended pasting), topcoating and impregnation of the resin composition 44 (FIG. 4 (d)).
  • the resin composition does not develop and adhere to the entire outer surface 1'. Since it adheres to the polka dots (43D, 44D) as shown in 4 (c) and 4 (d), the masking sheet 5 is not buried in the resin composition, and the peeling operation can be performed satisfactorily. Further, when the base layer 1 has the configuration shown in FIGS. 1A and 1E, the layer that repels the resin composition has a certain thickness, so that the resin composition 44 is also repelled on the side surface of the base layer 1. (R part in FIG. 4D), which makes the peeling work easier.
  • the masking sheet 31 is removed and cured.
  • a grid-like fiber reinforced plastic structure (FRP) in which reinforcing fibers are arranged in the resin matrix is formed, and the lower surface of the road deck can be reinforced.
  • the concrete surface on the lower surface of the floor slab is exposed, so that cracks and the like can be observed over time, and the retention of permeated water can be prevented.
  • the two layers of the reinforcing fibers are attached, only one masking is required, so that the masking accuracy is remarkably improved as compared with the case where the masking is performed every time the reinforcing fibers are attached. To do.
  • the masking sheet peeling step may be performed only once, the workability is improved.
  • the resin composition can be prevented from spreading to the outer surface of the base layer by flipping the resin composition from the side surface to the upper surface of the base layer.
  • Patent Document 1 For other details of the floor plate reinforcing method using reinforcing fibers, the description of Patent Document 1 and the like can be referred to.
  • the resin composition to be impregnated with the reinforcing fibers is generally an epoxy-based one, and a room temperature-curable epoxy-based resin composition is more preferable.
  • the resin is cured by curing at room temperature after coating without going through a heating step, and a reinforcing effect can be obtained.
  • Table 1 shows the material and composition of each base layer, the contact angle of ethanol with respect to the outer surface 1'(FIG. 1), and the surface roughness.
  • the contact angle with alcohols other than ethanol isopropanol (IPA) and butanol (BuOH)
  • OPP represents a biaxially stretched polypropylene film.
  • the contact angles in Table 1 were carried out by changing the liquid used in various ways by the static drip method of JIS R 3257 “Wetting property test on the surface of the substrate glass”.
  • a contact angle meter "Drop Master” (trade name) manufactured by Kyowa Interface Science was used for the measurement.
  • the surface roughness was measured using "Surfcom TOUCH50" (trade name) manufactured by Tokyo Seimitsu Co., Ltd.
  • Adhesive A As the pressure-sensitive adhesive A used for the pressure-sensitive adhesive layer, 97 parts by mass of 2-ethylhexyl acrylate and 3 parts by mass of acrylic acid were polymerized in a solvent using 2,2'-azobis (isobutyronitrile) as an initiator, and the solid content was 50. % Acrylic polymer was obtained. As a base polymer, an acrylic pressure-sensitive adhesive A containing 100 parts by mass of this acrylic polymer and 1 part by mass of an isocyanate-based curing agent (manufactured by Soken Kagaku Co., Ltd., trade name L-45) was prepared.
  • an isocyanate-based curing agent manufactured by Soken Kagaku Co., Ltd., trade name L-45
  • Adhesive B As the pressure-sensitive adhesive B used for the pressure-sensitive adhesive layer, 100 parts by mass of natural rubber, 150 parts by mass of calsim carbonate, 100 parts by mass of a tackifier (Quinton (registered trademark) R100 manufactured by Nippon Zeon), and 30 parts by mass of process oil were kneaded. A rubber-based adhesive B was prepared.
  • Adhesive C As the pressure-sensitive adhesive C used for the bonding layer, 100 parts by mass of an addition-curable silicone pressure-sensitive adhesive stock solution (KR-3074 manufactured by Shin-Etsu Chemical Industry Co., Ltd.) having a solid content concentration of 60% by mass, 54 parts by mass of toluene as a diluting solvent, and 0 platinum catalyst as a curing catalyst. A silicone-based pressure-sensitive adhesive C containing .5 parts by mass was prepared.
  • an addition-curable silicone pressure-sensitive adhesive stock solution KR-3074 manufactured by Shin-Etsu Chemical Industry Co., Ltd.
  • Primer used for the primer layer 100 parts by mass of the main agent (KR-3006A manufactured by Shin-Etsu Chemical Co., Ltd.), 10 parts by mass of the auxiliary agent (KR-3006BT manufactured by Shin-Etsu Chemical Co., Ltd.), and the catalyst (CAT-PS manufactured by Shin-Etsu Chemical Co., Ltd.) -8S) was blended, and an undercoating agent was prepared by adding an appropriate amount of toluene.
  • the main agent KR-3006A manufactured by Shin-Etsu Chemical Co., Ltd.
  • auxiliary agent KR-3006BT manufactured by Shin-Etsu Chemical Co., Ltd.
  • the catalyst CAT-PS manufactured by Shin-Etsu Chemical Co., Ltd.
  • Release agent A A coating liquid having a solid content concentration of 0.5% by mass prepared using a fluorinated silicone release agent (SYL-OFF Q-7785 manufactured by Toray Dow Corning) is prepared as a release agent for forming the release-treated surface. did.
  • Example 1 A release agent A is applied to the other surface of a PET film (Toray Mirror (registered trademark) S-10 # 50) that has been preliminarily subjected to an easy-adhesion treatment at a coating amount of 5 g / m 2 and dried. A mold release surface was formed. Next, a masking sheet was prepared by applying the pressure-sensitive adhesive A to the easy-adhesion-treated surface by a roll coating method so as to have a thickness of 30 ⁇ m. The total thickness of the masking sheet was 0.08 mm.
  • Example 2 A masking sheet is prepared by applying the release agent A to the dried PET film in the same manner as in Example 1 and applying the pressure-sensitive adhesive B with a calendar roll to form a rubber-based pressure-sensitive adhesive layer having a thickness of 100 ⁇ m. did. The total thickness of the masking sheet was 0.15 mm.
  • Example 3 A masking sheet was prepared by applying the pressure-sensitive adhesive B to the other surface of a 180 ⁇ m-thick PTFE film (7991 manufactured by Valqua) in which one surface was previously subjected to an easy-adhesion treatment in the same manner as in Example 2. The total thickness of the masking sheet was 0.28 mm.
  • Adhesive B was applied to both sides of the complementary layer with a calendar roll to prepare an adhesive sheet having a total thickness of 0.5 mm. Further, as in Example 1, the release agent A is applied to one side of the PET film at a coating amount of 5 g / m 2 , the primer is applied to the other side by the gravure coating method, and then the adhesive C is applied with a roll coater. A base layer was prepared by forming a bonding layer having a thickness of about 80 ⁇ m. A masking sheet was produced by laminating and adhering the bonding layer of the base layer and the adhesive sheet. The total thickness of the masking sheet was 0.63 mm.
  • Example 5 An undercoating agent is applied to the easily adhesive-treated surface of the PTFE film as in Example 3 by a gravure coating method, and then the adhesive C is applied with a roll coater to form a bonding layer of about 80 ⁇ m.
  • a base layer A masking sheet was produced by laminating the bonding layer of the base layer with an adhesive sheet prepared in the same manner as in Example 4. The total thickness of the masking sheet was 0.76 mm.
  • Example 6 Similar to Example 1, the release agent B was applied to the surface of the PET film that had not been subjected to the easy-adhesion treatment, and then the surface was passed through an embossed roll to form irregularities on the surface.
  • the base layer was prepared by applying the undercoat layer and the pressure-sensitive adhesive C to the easy-adhesion-treated surface in the same manner as in Example 4 to form a bonding layer.
  • a masking sheet was produced by laminating and adhering the bonding layer of the base layer with an adhesive sheet prepared by the same method as in Example 4. The total thickness of the masking sheet was 0.66 mm.
  • the surface roughness of the outer surface of the base layer was 14.6 ⁇ m as shown in Table 1.
  • Example 7 A masking sheet was prepared in the same manner as in Example 6 except that the embossed roll was not passed through. The total thickness of the masking sheet was 0.65 mm.
  • Example 8 A masking sheet was prepared by laminating two adhesive sheets prepared by the same method as in Example 4 on the outer surface of the adhesive sheet of the masking sheet prepared by the same method as in Example 5. The total thickness of the masking sheet was 1.76 mm.
  • Example 9 A masking sheet was prepared by laminating eight adhesive sheets prepared by the same method as in Example 4 on the outer surface of the adhesive sheet of the masking sheet prepared by the same method as in Example 5. The total thickness of the masking sheet was 4.76 mm.
  • Example 1 Using the PET film used in Example 1, a masking sheet was prepared in the same manner as in Example 1 except that the release agent was not applied to the PET film. The total thickness of the masking sheet was 0.08 mm.
  • Comparative Example 2 A masking sheet was produced in the same manner as in Comparative Example 1 except that the PET film was changed to an OPP film (Toray's Trefan (registered trademark) # 30-2500H). The total thickness of the masking sheet was 0.09 mm.
  • Eposerm Resin XL-800A (trade name) manufactured by Mitsubishi Chemical Infratec Co., Ltd. is used as the resin composition, and the resin composition on the outer surface of the base layer is repellent (resin repellent) and peeled from the sticking surface based on the following criteria.
  • the results are shown in Table 2.
  • ⁇ The entire surface was repelled, and the resin composition adhered to 10% or less of the area of the outer surface of the base layer.
  • the masking sheet according to the present invention was able to repel the resin composition when the ethanol contact angle on the outer surface of the base layer was 30 ° or more. As a result, peeling was easy even after the resin composition had hardened. Further, by having an appropriate thickness, the handleability was also good. Further, the masking sheet (Example 6) in which the outer surface of the base layer has irregularities has higher resilience and handleability of the resin composition as compared with the one having a flat outer surface (Example 7). It was.
  • the masking sheets of Examples 1 to 3 have a thickness of about 0.2 mm, the workability of the peeling work after applying the resin composition is slightly inferior to that of the other examples. Met. Further, since the masking sheet of Example 9 has a thickness of 4.76 mm, it slightly interferes with the iron and rollers when the resin composition is applied, and in this respect, the workability is inferior. And peeling work could be done well.
  • the masking sheet according to the present invention repels the resin composition on the outer surface of the base layer, the peeling workability is good even if the coating is applied a plurality of times. Further, since the peeling work only needs to be performed once for a plurality of coatings, it also has an effect of reducing waste.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
PCT/JP2020/046815 2019-12-27 2020-12-15 マスキングシート及びそれを用いた道路床版の補強方法 Ceased WO2021131922A1 (ja)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004027718A (ja) * 2002-06-27 2004-01-29 Sho Bond Constr Co Ltd コンクリート構造物の補修・補強・劣化防止用シート及びコンクリート構造物の補修・補強・劣化防止方法
JP2010194715A (ja) * 2009-02-20 2010-09-09 Nitto Denko Corp 表面保護シート
JP2012111113A (ja) * 2010-11-24 2012-06-14 Lintec Corp セラミックグリーンシート成型用剥離フィルムおよびその製造方法
JP2015048388A (ja) * 2013-08-30 2015-03-16 東洋アルミニウム株式会社 撥水性表面への接着に適した粘着テープ
WO2019012655A1 (ja) * 2017-07-13 2019-01-17 株式会社寺岡製作所 多層マスキングシート

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004027718A (ja) * 2002-06-27 2004-01-29 Sho Bond Constr Co Ltd コンクリート構造物の補修・補強・劣化防止用シート及びコンクリート構造物の補修・補強・劣化防止方法
JP2010194715A (ja) * 2009-02-20 2010-09-09 Nitto Denko Corp 表面保護シート
JP2012111113A (ja) * 2010-11-24 2012-06-14 Lintec Corp セラミックグリーンシート成型用剥離フィルムおよびその製造方法
JP2015048388A (ja) * 2013-08-30 2015-03-16 東洋アルミニウム株式会社 撥水性表面への接着に適した粘着テープ
WO2019012655A1 (ja) * 2017-07-13 2019-01-17 株式会社寺岡製作所 多層マスキングシート

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