JP7381691B2 - Sheet for blasting method - Google Patents

Description

The present invention relates to a sheet for blast construction.

When repainting a structure such as a bridge, the old paint film is removed by blasting and a new paint film is applied. Blasting produces paint film dust. Paint films may contain harmful substances such as polychlorinated biphenyls and lead, so when performing blasting, it is necessary to seal the work environment and prevent dust from scattering.

To prevent dust from scattering during blasting, a common method is to use panels to separate the work environment from the outside, and to cover the inside of the panels with blasting sheets. As the sheet for the blasting method, a sheet for general construction work is used. This sheet for construction work is made by coating the surface of a woven fabric made of flat yarn with a resin, and polyethylene or polyvinyl chloride is used as the resin (for example, Patent Document 1).

Japanese Patent Application Publication No. 3-36367

However, when a sheet for construction work is used as a sheet for blasting, holes may be created by flying debris such as cutting materials that bounce off the surface to be treated during blasting. Holes are particularly likely to form when blasting is performed in a low-temperature environment, such as during winter. There are concerns that if holes are made in blasting sheets, dust containing harmful substances may leak outside.

In addition, sheets for blasting using polyvinyl chloride may suffer brittle fracture in low-temperature environments such as outdoors in winter, making them more likely to tear. In addition, polyethylene is known as a general-purpose plastic that is resistant to low temperatures, but the energy applied to the blasting sheet by flying debris during blasting is strong, and there is a risk of tearing (chipping) caused by flying debris even at room temperature. there were.

The present invention has been made in view of the above-mentioned circumstances, and is intended for use in blasting methods that are less likely to form holes due to the collision of flying objects during blasting in low-temperature environments, and that can prevent brittle fractures at low temperatures. The purpose is to provide sheets.

The present invention has the following aspects.
<1> A sheet for blasting method containing a soft vinyl chloride resin composition in which a plasticizer is added to vinyl chloride resin, which has a thickness of 200 μm or more, and has an impact energy resistance of -20°C in a film impact tester test. The plasticizer contains an aliphatic dibasic acid ester, and the amount of the plasticizer is 30 to 55 parts by weight based on 100 parts by weight of the vinyl chloride resin. A sheet for blasting method, wherein the basic acid ester accounts for 50% by mass or more of the plasticizer.
However, in the film impact tester test, a sheet cut into a strip with a width of 10 cm is prepared as a test piece, and the sample piece is placed in a constant temperature bath using a film impact tester equipped with a constant temperature bath (manufactured by Toyo Seiki Co., Ltd.). After keeping the temperature constant, the sample piece was fixed to a fixing plate with an outer diameter of 15 cm x 10 cm and a hole with a diameter of 5 cm in the center, and an impact energy of 3 J was applied using a pendulum hammer with a hemispherical impactor whose tip was 1 cm in diameter. The sample piece was struck with a , and the impact energy was measured. Measurements were performed at constant temperature bath temperatures of -25°C, -20°C, -15°C, -10°C, 0°C, and 25°C, respectively.

<2> The sheet for blasting method according to <1>, wherein the impact energy resistance determined by the film impact tester test is 2.0 J or more at -10°C.

<3> The blasting method according to <1> or <2>, wherein the aliphatic dibasic acid ester contains at least one of dioctyl adipate and bis[2-(2-butoxyethoxy)ethyl]adipate. Sheet for use.

<4> The sheet for blasting method according to any one of <1> to <3>, which has flame retardant properties.

According to the present invention, it is possible to provide a sheet for blasting that is less likely to form holes due to collision of flying objects during blasting in a low-temperature environment and can prevent brittle fracture at low temperatures.

FIG. 2 is a schematic diagram showing an overview of a chipping resistance test.

The following definitions of terms apply throughout the specification and claims.
"Machine Direction" is the flow direction when forming the sheet, ie, the longitudinal direction.
"Young's modulus" is a tensile modulus measured by the method specified in JIS K 7161-1:2014.
"Elongation at break" is tensile strain at break measured by the method specified in JIS K 7161-1:2014.
"Embrittlement temperature" is the lowest temperature value at which cracking due to embrittlement does not occur, as measured using a film impact tester (pendulum type impact tester) equipped with a constant temperature oven, manufactured by Toyo Seiki Seisakusho Co., Ltd.
The detailed measurement method is as described in Examples.
"Having flame retardancy" means exhibiting flame retardancy of grade 2 or higher in a flame retardant test according to method B of JIS Z 2150:1996.
"~" indicating a numerical range means that the numerical values written before and after it are included as lower and upper limits.

<Sheet for blasting method>
The sheet for blasting according to this embodiment is made of a soft vinyl chloride resin composition.
The soft vinyl chloride resin composition contains a vinyl chloride resin and a plasticizer.
The soft vinyl chloride resin composition may further contain components other than the vinyl chloride resin and the plasticizer (hereinafter also referred to as "other components") as necessary, as long as the effects of the present embodiment are not impaired. good.

(vinyl chloride resin)
Examples of the vinyl chloride resin include polyvinyl chloride, a copolymer mainly composed of vinyl chloride, and the like. Examples of the copolymer mainly composed of vinyl chloride include ethylene-vinyl chloride copolymer, vinyl acetate-vinyl chloride copolymer, vinyl chloride-halogenated olefin copolymer, and the like.

In addition, other compatible resins mainly composed of these vinyl chloride resins (for example, polyester resins, epoxy resins, acrylic resins, vinyl acetate resins, urethane resins, acrylonitrile-styrene-butadiene copolymers, partially saponified polyvinyl alcohol, etc.) ) is also included.

The proportion of vinyl chloride units in the vinyl chloride resin is preferably 80% by mass or more based on the total resin components. The method of polymerizing the vinyl chloride resin is not particularly limited, and examples thereof include commonly used polymerization methods such as bulk polymerization, emulsion polymerization, suspension polymerization, and solution polymerization. Any one type of these vinyl chloride resins may be used alone, or two or more types may be used in combination.

The average degree of polymerization of the vinyl chloride resin is preferably from 800 to 2,500, more preferably from 1,000 to 2,000. If the average degree of polymerization is at least the lower limit of the above range, it will not stretch too much when stretched and will not impair handling properties. If the average degree of polymerization is below the upper limit of the above range, it will not be too hard and will not easily form holes during blasting.

(Plasticizer)
Examples of the plasticizer include aromatic dibasic acid ester plasticizers such as dioctyl phthalate, di-2-ethylhexyl phthalate, dibenzyl phthalate, diisononyl phthalate, diisodecyl phthalate, and diisooctyl isophthalate; di-n-butyl adipate; Diisobutyl adipate, dioctyl adipate, bis(2-ethylhexyl) adipate, diisononyl adipate, diisodecyl adipate, bis[2-(2-butoxyethoxy)ethyl]adipate, bis(2-ethylhexyl) azelate, dibutyl sebacate, bis(2- Aliphatic dibasic acid ester plasticizers such as ethylhexyl) sebacate, diethyl succinate, di-n-butyl maleate, and monobutyl itaconate; Aliphatic tribasic acid ester plasticizers such as tri-n-butyl citrate; butyl Aliphatic monobasic acid ester plasticizers such as oleate; polyhydric alcohol derivative plasticizers such as glycerin monoricinolate; phosphate ester plasticizers such as tricresyl phosphate and tricylenyl phosphate; epoxidized soybean oil, etc. Examples include epoxy plasticizers. These plasticizers may be used alone or in combination of two or more.

The plasticizer includes at least one plasticizer selected from the group consisting of aromatic dibasic acid ester plasticizers and aliphatic dibasic acid ester plasticizers from the viewpoint of compatibility with vinyl chloride resin. is preferred. In this embodiment, bis(2-ethylhexyl) phthalate (hereinafter referred to as DOP) can be exemplified as the aromatic dibasic acid ester of the plasticizer. In addition, from the viewpoint of brittleness resistance in low-temperature environments, bis(2-ethylhexyl) adipate (dioctyl adipate: hereinafter referred to as DOA), bis[2-(2-butoxyethoxy)ethyl ] Adipate (hereinafter referred to as BXA-N) and bis(2-ethylhexyl) sebacate (hereinafter referred to as DOS) can be exemplified.

The content of the plasticizer is preferably 30 to 55 parts by weight, more preferably 30 to 50 parts by weight, based on 100 parts by weight of the vinyl chloride resin, in order to support blasting in a low-temperature environment. If the content of the plasticizer is at least the lower limit of the above range, the soft PVC will have excellent flexibility and will have improved cold resistance. Furthermore, film formability (production stability) is improved. If the content of the plasticizer is below the upper limit of the above range, the sheet for use in the present blasting method will have better handling properties.

In this embodiment, it is preferable to use an aliphatic dibasic acid ester among the dibasic acid esters. As the aliphatic dibasic acid ester, it is preferable to use DOA and BXA-N. When using DOA or BXA-N as the aliphatic dibasic acid ester, it is preferable that at least one of these DOA and BXA-N accounts for 50% by mass or more of the total amount of the plasticizer. As a result, excellent chipping resistance can be exhibited even in a low temperature environment of -10°C.

(Flame retardants)
From the viewpoint of flame retardant properties of the sheet for blasting according to the present embodiment, it is preferable that a flame retardant is included.
Examples of the flame retardant include phosphate ester flame retardants, phosphorus-nitrogen composite flame retardants, halogen flame retardants, and the like. When containing a phosphate ester flame retardant as a flame retardant, it is preferable that the soft vinyl chloride resin composition further contains a metal hydroxide as described below.
When the flame retardant includes a phosphate ester flame retardant, the content of the phosphate ester flame retardant is preferably 5 to 30 parts by weight, more preferably 10 to 25 parts by weight, based on 100 parts by weight of the vinyl chloride resin.

When the flame retardant contains a phosphate ester flame retardant and further contains a metal hydroxide, the content of the phosphate ester flame retardant is preferably 1 to 30 parts by mass, and 5 parts by mass based on 100 parts by mass of the vinyl chloride resin. ~15 parts by mass is more preferred.
Phosphate ester flame retardants include trimethyl phosphate (TMP), triethyl phosphate (TEP), tributyl phosphate (TBP), 2-ethylhexyl phosphate (TOP), and triphenyl phosphate. Examples include cresyl diphenyl phosphate (TPP), trixylenyl phosphate (TCP), trixylenyl phosphate (TXP), cresyl diphenyl phosphate (CDP), and 2-ethylhexyl diphenyl phosphate.
(other ingredients)
Other components include stabilizers, metal hydroxides, ores, lubricants, flame retardant aids, anti-blocking agents, rubber, elastomers, etc., and may be contained within a range that does not impair the purpose and characteristics of the present invention. good.

Examples of the stabilizer include epoxy stabilizers such as bisphenol A glycidyl ether, barium-zinc composite stabilizers, calcium-zinc composite stabilizers, and the like. These stabilizers may be used alone or in combination of two or more.
The stabilizer preferably contains an epoxy stabilizer and a barium-zinc composite stabilizer from the viewpoints of compatibility with vinyl chloride resin, moldability, and low toxicity. The barium-zinc composite stabilizer may be in liquid or powder form.

The content of the stabilizer is preferably 1 to 10 parts by weight, more preferably 3 to 8 parts by weight, based on 100 parts by weight of the vinyl chloride resin.

Metal hydroxides are used to improve flame resistance. Examples of metal hydroxides include magnesium hydroxide, aluminum hydroxide, manganese hydroxide, calcium hydroxide, ammonium hydroxide, zinc hydroxide, hydroxide shell (II), lanthanum hydroxide, iron hydroxide (II), etc. Can be mentioned. Any one type of these metal hydroxides may be used alone, or two or more types may be used in combination.

When the soft vinyl chloride resin composition contains a metal hydroxide, the content of the metal hydroxide is preferably 3 to 30 parts by weight, more preferably 5 to 20 parts by weight, based on 100 parts by weight of the vinyl chloride resin. By setting the blending ratio within this range, the flame retardant effect can be enhanced without impairing handleability or workability.
The ore is used to improve flame resistance. Examples of the ore include hydrotalcite, talc, montmorinite, mica, and other ores containing hydroxyl groups. Any one of these ores may be used alone, or two or more may be used in combination.
Further, when the soft vinyl chloride resin composition contains ore, the content of the ore is preferably 3 to 20 parts by weight, more preferably 5 to 15 parts by weight, based on 100 parts by weight of the vinyl chloride resin. By setting the blending ratio within this range, the flame retardant effect can be enhanced without impairing handleability or workability.

Examples of the lubricant include fatty acid amides such as ethylene bisstearamide, stearamide, palmitic acid amide, and oleic acid amide, polyethylene wax, and stearic acid. These lubricants may be used alone or in combination of two or more.

When the soft vinyl chloride resin composition contains a lubricant, the content of the lubricant is, for example, 0.1 to 1.0 parts by mass based on 100 parts by mass of the vinyl chloride resin.

Examples of the flame retardant aid include antimony compounds such as antimony trioxide; metal compounds such as ZnS and zinc borate; and organometallic complexes. By including such a flame retardant aid, flame retardancy can be imparted to the sheet for blasting.

Examples of the antiblocking agent include crosslinked vinyl chloride resin particles, polyolefin resin powder, fatty acid ester, and the like. These antiblocking agents may be used alone or in combination of two or more.

When the soft vinyl chloride resin composition contains an antiblocking agent, the content of the antiblocking agent is, for example, 1 to 10 parts by weight based on 100 parts by weight of the vinyl chloride resin.

(sheet for blasting method)
A preferred embodiment of the soft vinyl chloride resin composition of the present embodiment is a soft vinyl chloride resin composition containing a vinyl chloride resin, a plasticizer containing an aliphatic dibasic acid ester, particularly DOA and BXA-N, and a flame retardant. It is a thing.
The sheet for blasting method of this embodiment made of such a vinyl chloride resin composition has an impact resistance energy of 2.0 J or more at 25°C in a film impact tester test, and a difference between 25°C and -10°C. It is less than 0.1J.

If the impact energy as determined by the film impact tester test is 2.0 J or more at 25°C, holes will not easily form in the sheet for blasting during blasting. If the difference in impact energy measured by a film impact tester test between 25°C and -10°C is less than 0.1J, holes are unlikely to form in the sheet for blasting even during blasting in a low-temperature environment.

It is preferable that the sheet for blasting according to the present embodiment has an impact energy resistance of 2.0 J or more at -10° C. in the above-mentioned film impact tester test. Further, it is preferable that the impact energy is 2.0 J or more at -20°C.
If the impact energy according to the film impact tester test is 2.0 J or more at -10°C or 2.0 J or more at -20°C, holes are unlikely to be formed in the blasting sheet even during blasting in a low-temperature environment.

The sheet for blasting according to the present embodiment has a Young's modulus in the flow direction of 5 to 200 MPa, preferably 5 to 100 MPa, more preferably 5 to 50 MPa, and even more preferably 10 to 30 MPa.
If the Young's modulus is at least the lower limit of the above range, the productivity and workability of the sheet for blasting will be good. If the Young's modulus is below the upper limit of the above range, holes will hardly form during blasting.
In addition, such Young's modulus can be adjusted by the content of the plasticizer in the soft vinyl chloride resin composition, the degree of polymerization of the vinyl chloride resin, and the like. For example, the greater the plasticizer content, the lower the Young's modulus tends to be.

The elongation at break of the sheet for blasting according to the present embodiment in the machine direction is 100 to 500%, preferably 150 to 450%, and more preferably 200 to 400%. If the elongation at break is greater than or equal to the lower limit of the above range, holes will be less likely to form during blasting. If the elongation at break is below the upper limit of the above range, the productivity and workability of the sheet will be good.
The elongation at break can be adjusted by the content of plasticizer in the soft vinyl chloride resin composition, the degree of polymerization of the vinyl chloride resin, and the like. For example, the higher the plasticizer content, the higher the elongation at break tends to be.

The thickness of the sheet for blasting according to the present embodiment is preferably 110 to 300 μm, more preferably 150 to 250 μm. If the thickness is greater than or equal to the lower limit of the above range, holes are less likely to form during blasting. If the thickness is less than or equal to the upper limit of the above range, handling and workability are good.

It is preferable that the sheet for blasting method of this embodiment has flame retardant properties.
Methods for increasing the flame retardancy of sheets for blasting methods include a method of incorporating the above-mentioned flame retardant, a method of incorporating a metal hydroxide into a soft vinyl chloride resin composition, a method of incorporating an ore such as antimony trioxide, etc. can be mentioned. Moreover, the above methods may be used in combination.

The sheet for blasting according to the present embodiment preferably has a embrittlement temperature of 0°C or lower, more preferably -15°C or lower, and even more preferably -25°C or lower. If the embrittlement temperature is below the upper limit, the sheet for blasting will have excellent cold resistance, and holes will not easily form in the sheet for blasting even during blasting in a low-temperature environment.

The lower the embrittlement temperature of the sheet for blasting, the better, and the lower limit of the embrittlement temperature is not particularly limited, but is, for example, -40°C.
A method for lowering the embrittlement temperature can be achieved by incorporating an aliphatic dibasic acid ester plasticizer into the soft vinyl chloride resin composition. Examples include a method using a plasticizer containing DOA, a method using a plasticizer containing BXA-N, and a method using a plasticizer containing both DOA and BXA-N.

The sheet for blasting according to the present embodiment may have a functional layer for imparting various functions as necessary, within a range that does not impair each of the above-mentioned effects. Examples of the functional layer include a decorative layer, an anti-blocking layer, a weather-resistant layer, and the like.

The sheet for blasting of this embodiment can be manufactured, for example, by molding a soft vinyl chloride resin composition into a sheet shape. The soft vinyl chloride resin composition can be prepared, for example, by mixing a vinyl chloride resin, a plasticizer containing at least an aliphatic dibasic acid ester, and other components as necessary. Examples of methods for molding sheets for blasting using a soft vinyl chloride resin composition include extrusion molding, calendar molding, and inflation molding. Note that the sheet for blasting may be unstretched or may be stretched.

(Application)
The sheet for blasting method of this embodiment is for blasting treatment.
In blasting, a cutting material is sprayed onto the surface of the structure to be treated. As a result, the coating film and the like on the surface to be treated are removed in the form of dust. The sheet for blasting of this embodiment is used to prevent dust generated during blasting from scattering outside from the working environment.

The specific method of using the sheet for blasting method of this embodiment may be the same as the method of using the sheet for blasting method conventionally used for blasting. For example, this embodiment is designed to prevent dust from scattering to the outside from the gaps between the panels or the gaps between the panels and the scaffolding on the inside of the panel surrounding the surface to be treated of the structure and the scaffolding for blasting. Blasting method sheets can be placed.

The distance between the surface to be treated of the structure and the blasting sheet of this embodiment is, for example, about 10 to 200 cm.
Examples of structures include metal buildings and structures such as bridges and play equipment such as slides; metal machines and devices such as presses and gas cylinders.
Examples of cutting materials include plastic, sand, and steel.

(Mechanism of action)
In the sheet for blasting method of the present embodiment described above, the impact energy in the film impact tester test is 2.0 J or more at 25°C, and the difference between 25°C and -10°C is less than 0.1 J. Therefore, even in a low-temperature environment of -10° C., for example, when the cutting material sprayed onto the treated surface of a structure by blasting bounces off the treated surface and hits the curing sheet, holes are unlikely to be formed.

One possible reason why holes are difficult to form is that the blasting sheet is soft even at low temperatures, so it deforms easily when it is hit by cutting material, reducing the impact. It is thought that the construction sheets used in conventional blasting methods become hard at low temperatures, making them more prone to holes.

In particular, when an aliphatic dibasic acid ester is used as a plasticizer, the glass transition point (Tg) of the soft vinyl chloride resin composition is lowered by the dibasic acid ester that does not contain an aromatic ring, and even in a low temperature environment of -10°C. The flexibility of the sheet for blasting method is maintained. As a result, it is possible to realize a sheet for blasting with excellent low-temperature properties that does not break even in a blast irradiation test at -10°C.

Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention as well as within the scope of the invention described in the claims and its equivalents.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
Vinyl chloride resin: Polyvinyl chloride (PVC) with an average degree of polymerization of 1400.
Plasticizer 1: Aromatic dibasic acid ester: dioctyl phthalate (DOP).
Plasticizer 2: Aliphatic dibasic acid ester: dioctyl adipate (DOA).
Plasticizer 3: Aliphatic dibasic acid ester: bis[2-(2-butoxyethoxy)ethyl]adipate (BXA-N).
Plasticizer 4: Aliphatic dibasic acid ester: bis(2-ethylhexyl) sebacate (DOS).
Flame retardant: Phosphate ester flame retardant: Tricresyl phosphate (TCP).

The above-mentioned materials were mixed according to the formulations (parts by mass) shown in Table 1 (Examples) and Table 2 (Comparative Examples, Reference Examples), and kneaded at 185 ° C. for 5 minutes using a test roll machine (two-roll mill). By peeling it off from the roll, sheets of Examples 1 to 7 and Comparative Examples 1 to 4 (sheets for blasting method) were obtained. Note that the thickness was adjusted by changing the gap between the two rolls. As a reference example, a flat yarn-containing vinyl chloride coated sheet, which is used as a sheet for blast construction, and a polyethylene sheet were also used.

Film impact tester (FIT) test Test equipment: Film impact tester (Toyo Seiki film impact tester with constant temperature oven)
The sheets of each sample described above were cut into strips with a width of 10 cm to prepare samples for measurement. The sample, which had been placed in a constant temperature bath and kept at a constant temperature, was fixed to a fixing plate with an outer diameter of 15 cm x 10 cm and a hole with a diameter of 5 cm in the center, and a pendulum-type hammer with a hemispherical impactor with a diameter of 1 cm at the tip. Each sample for measurement was hit with an impact energy of 3 J, and the impact energy of the sample was measured. The temperature of the constant temperature layer was set to -25°C, -20°C, -15°C, -10°C, 0°C, and 25°C, and the measurements were performed.
The results of the FIT test are shown in Table 1 (Examples) and Table 2 (Comparative Examples, Reference Examples).

Next, a chipping resistance test was conducted on each of the above-mentioned materials.
Test equipment: Mighty Mini R (manufactured by SNM Asia Co., Ltd.)
Test temperature: -10℃
Test pressure: 0.3MPA
Test time: 10 seconds Test distance (distance between injection nozzle tip and sample surface): 35cm
Cutting material: Steel grid Sample stand: Iron plate

As shown in FIG. 1, in the chipping resistance test, an iron plate 22 serving as a sample stand is provided in a chamber 21, and each sample S is placed on this iron plate 22. Then, the cutting material C is injected into the chamber 21 from the cutting material supply section 23. Then, it is visually confirmed whether damage such as a hole is caused in each sample S by the injected cutting material C.
The results of the chipping resistance test are shown in Table 1 (Examples) and Table 2 (Comparative Examples, Reference Examples). Note that samples in which holes were not made by cutting material C were marked as ○, and samples in which holes were made were marked as ×.

According to the results of the present invention, if the impact energy in the film impact tester test is 2.0 J or more at 25°C and the difference between 25°C and -10°C is less than 0.1 J, then it is called -10°C. It was confirmed that excellent chipping resistance can be ensured even in low-temperature environments. Therefore, in the present invention, it is possible to realize a sheet for blasting method that does not cause holes due to flying objects even when used in a blasting method in a low temperature environment such as -10°C.

When using DOA as a plasticizer, chipping resistance at -10° C. can be achieved by making the amount of DOA added account for 50% by mass or more of the total amount of plasticizers including other plasticizers. However, when DOS is used as a plasticizer, chipping resistance at -10°C can be achieved even if the amount added is less than 1 times the total amount of other plasticizers.

Furthermore, if the impact strength is 2.0 J or more in the FIT test at -10°C, the sheet will not break even in the chipping resistance at -10°C.
Further, by setting the thickness of the sheet in the range of 110 μm to 300 μm, chipping resistance at −10° C. can be achieved while ensuring workability.

Claims (4)

A sheet for blasting method comprising a soft vinyl chloride resin composition in which a plasticizer is added to vinyl chloride resin, the sheet having a thickness of 200 μm or more, and
Impact resistance energy according to a film impact tester test is 2.0 J or more at -20°C,
The plasticizer includes an aliphatic dibasic acid ester,
A blasting method characterized in that the plasticizer is 30 to 55 parts by weight based on 100 parts by weight of the vinyl chloride resin, and the aliphatic dibasic acid ester accounts for 50% by mass or more of the plasticizer. Sheet for use. The sheet for blasting according to claim 1, wherein the impact energy resistance determined by the film impact tester test is 2.0 J or more at -10°C. The sheet for blasting according to claim 1 or 2, wherein the aliphatic dibasic acid ester contains at least one of dioctyl adipate and bis[2-(2-butoxyethoxy)ethyl]adipate. The sheet for blasting method according to any one of claims 1 to 3, which has flame retardant properties.

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