JP3954866B2 - Wall protective material and wall protective structure - Google Patents

Description

【００３１】
上記表１の評価結果より、衝撃吸収性能、表面強度、施工性をそれぞれ付与してなる壁面保護材Ａを総合的に評価すると、実施例１〜４のものが壁面保護材Ａとして好ましく、実施例１〜３がより好ましいと言える。その中でも、壁面保護材Ａとして衝撃吸収性を重視する場合には、実施例２が好ましく、施工性を重視する場合には、実施例１又は実施例３が好ましいと言える。
【００３２】
【発明の効果】
本発明に係る壁面保護材によれば、建造物の内部壁面に貼り付ける壁面材としての意匠性および表面強度を備えると同時に、所要の衝撃吸収性能およびぶつかった時の怪我防止性能を備えたものとなる。
しかも、壁面パネルの表面から側縁ないしは裏側まで回り込ませたり、壁面の出隅・入隅部分やドア或いはドア枠またはキャビネット等の平坦でない複雑な形状部分にも容易に追従して、施工性(施工の容易性)も良好なものとなる。
【００３３】
また、請求項２に係る壁面保護材によれば、熱可塑性樹脂表面層が、熱可塑性樹脂透明層と熱可塑性樹脂印刷層とからなるので、従来の壁面材に比較して勝るとも劣らない優れた意匠性を発揮すると同時に、衝撃吸収性能と怪我防止性および施工性に優れた壁面保護材となる。
【００３４】
また、請求項３に係る壁面保護構造によれば、壁面保護材を、壁面パネルの表面に少なくとも側縁まで回り込ませて固着してなるので、上記壁面保護材を用いた壁面保護構造を提供しえ、床材や壁紙などの貼着技術を使用した施工方法にて容易に固着することができると共に、表面強度、衝撃吸収性能、怪我防止性能に優れた壁面保護構造を得ることができる。
しかも、上記壁面保護材を壁面の上面に貼り合せることによって、従来の壁面に比べ、衝撃吸収性能が減少し（最大加速度Ｇ値が２５Ｇ以上減少）、怪我防止性能を大幅に向上させることができる。
【図面の簡単な説明】
【図１】 本発明に係る壁面保護材を壁面に貼り付けた状態の実施の一例を示す模式断面図。
【図２】 本発明に係る壁面保護材の他の実施例を示す模式断面図。
【符号の説明】
Ａ：壁面保護材 Ｂ：壁面
１：樹脂発泡層 ２：樹脂表面層
３：固着用接着剤
２１：透明層 ２２：印刷層[0001]
BACKGROUND OF THE INVENTION
The present invention uses a wall surface protection material for protecting the wall surface by being attached to an internal wall surface such as a corridor or a living room in a building, and at the same time, improving the design and design (appearance) of the wall surface. In particular, we used wall protection materials suitable for application to the walls of facilities that could cause injury if they collide with the walls of hospitals, health facilities, or prison cells, etc. The present invention relates to a wall surface protection structure.
[0002]
[Prior art]
Many of what has been conventionally provided as a wall material to be attached to the inner wall surface of a building is a relatively thin synthetic resin sheet or film called a so-called wallpaper. The wall material made of this thin synthetic resin sheet / film is designed mainly for the purpose of design, surface antifouling, and surface scratch resistance. It can be easily turned around to the side edge, and can easily follow the corners and corners of the wall, doors or door frames, the side and back of the retractable (storage) bed, or a non-flat complicated shape such as a cabinet. Therefore, the workability (ease of construction) was good, but the shock absorption performance and the injury prevention performance when hitting were insufficient.
[0003]
Conversely, wall protection materials designed around shock absorption performance and injury prevention performance, of course, have sufficient performance for impact absorption performance and injury prevention performance, but the workability on the wall surface is greatly improved. This causes a problem that it decreases. In particular, it may not be able to follow the complicated shapes such as the corners and corners of the wall surface, doors or door frames, cabinets, etc., and even construction may not be possible in some cases.
In addition, this type of wall surface material has a problem that it has a weak surface strength as a wall surface protection material and is easily broken against scratches and impacts.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of such a situation, and has a design property and a surface strength as a wall surface material to be attached to an inner wall surface of a building, and at the same time, required shock absorption performance and prevention of injury when a collision occurs. It has performance, and it can be easily turned around from the surface of the wall panel to the side edge or back side, and it can easily follow the complicated corners such as the corners and corners of the wall, doors, door frames or cabinets. In addition, the object is to provide a wall surface protective material having good workability (easy construction).
Here, the surface strength refers to the performance that prevents the surface from being scratched or torn even when a child hits a toy or scratches it with a spoon.
Still another object of the present invention is to provide a wall surface protection structure using the wall surface protective material.
[0005]
[Means for Solving the Problems]
The wall surface protective material of the present invention that achieves the above object is a wall surface protective material obtained by integrally laminating a thermoplastic resin surface layer on a thermoplastic resin foam layer, The foam layer has a thickness of 1.0 to 3.0 mm, an expansion ratio of 2 to 30 times, a compressive strength of 5 to 70 kPa, and a thickness of the thermoplastic resin surface layer of 0.25 to 1. 5 mm, surface hardness of 30-50, scratch resistance of hardness B or higher, tear strength of 65-100 N / mm, puncture impact strength of 35-75 N · mm and bending holding time of 15 seconds or more The thickness is 1.0 mm to 5.0 mm, and the maximum acceleration is 135 G or less (claim 1).
In this case, the thermoplastic resin surface layer is preferably composed of a thermoplastic resin transparent layer and a thermoplastic resin print layer (claims). 2 ).
Further, the wall surface protective structure according to the present invention is characterized in that when the wall surface protective material is bonded to the surface of the wall surface, the wall surface protective material is wrapped around and bonded to at least the side edge of the wall surface (claim). 3 ).
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the wall surface protection material and the wall surface protection structure according to the present invention will be described in detail with reference to the drawings, but the present invention is not limited to these examples.
[0007]
The wall surface protective material A according to the present invention is basically composed of a laminate in which a thermoplastic resin foam layer 1 and a thermoplastic resin surface layer 2 are integrally laminated, and is bonded to the inner wall surface of a building or the surface of a wall panel. As a result, the wall surface is provided with design properties, shock absorption performance, injury prevention performance and surface strength, and at the same time, excellent workability (ease of construction) is exhibited.
The wall surface B to which the wall surface protective material A according to the present invention is applied is used not only for the existing internal wall surface, but also for constituting the internal wall surface of a building including a movable or fixed partition or partition. Metal plates such as iron plates, plaster boards, slate plates, synthetic resin plates, particle boards, and other flat plates (wall panels), and doors, door frames, and tiltable (Storage) The side and back surfaces of the bed, cabinets and the like are also included, and these are collectively referred to simply as wall surfaces.
[0008]
The thermoplastic resin foam layer 1 is mainly for improving impact absorption performance and injury prevention performance as the wall surface protection material A, and is made by foaming thermoplastic resin or rubber, or by laminating those foams. Can be used. Examples of the thermoplastic resin forming the foamed layer 1 include high-density polyethylene, low-density polyethylene, linear low-density polyethylene, homopolypropylene, random polypropylene, block polypropylene, polybutene-1, ethylene and α having 3 or more carbon atoms. Copolymers with olefin, ethylene-propylene rubber, ethylene-propylene-diene rubber, ethylene-butene rubber, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid ester copolymer resin, ethylene-methacrylic acid copolymer resin, etc. One kind or a mixture of two or more kinds of synthetic resins such as a copolymer of vinyl monomers, an olefinic thermoplastic elastomer, and an amorphous α-olefin resin can be used.
The expansion ratio of the foam layer 1 is preferably about 2 to 40 times. That is, when the expansion ratio is lower than 2 times, the desired impact absorption performance cannot be obtained, and when the expansion ratio is higher than 40 times, the impact absorption performance is lowered. Therefore, the expansion ratio is more preferably about 2 to 30 times. In addition, the compression strength is preferably 5 to 70 kPa, more preferably 10 to 50 kPa, as measured by the compression strength according to JIS K 6767 5.7 [compression hardness]. At this time, the form of foaming may be either open cells or closed cells, but closed cells are preferable if more excellent shock absorbing performance is exhibited.
Incidentally, the expansion ratio of the foamed layer 1 varies depending on whether the thermoplastic resin used as a raw material is a soft resin or a hard resin. For example, when a soft thermoplastic resin such as vinyl chloride is used, the expansion ratio is 2-5. The expansion ratio is about twice, and when a hard thermoplastic resin such as polyethylene is used, the expansion ratio is about 25 to 30 times. By doing so, the required compressive strength described above can be exhibited.
[0009]
Moreover, although the thickness of the foam layer 1 is determined according to the foaming ratio, 1.0 to 5.0 mm is usually appropriate. When the foam layer 1 is thick, the bending workability at the time of construction is lowered and the workability is increased. Therefore, the thickness is preferably about 1.0 mm to 3.0 mm.
As a result of the experiment, in consideration of the balance between shock absorbing performance and workability as the wall surface protective material A, the foam layer 1 made of a soft thermoplastic resin such as vinyl chloride has a thickness of 2.0 mm to 2.5 mm. The wall surface protective material A is impacted by setting the magnification to 2 to 5 times, and the foam layer 1 made of a rigid thermoplastic resin such as polyethylene having a thickness of 2.0 mm to 2.5 mm and an expansion rate of 25 to 30 times. A foam layer 1 excellent in absorption performance and workability was obtained.
[0010]
In the present invention, the impact absorbing performance was evaluated in accordance with a method defined in JIS-A-6519 [steel floor foundation material for gymnasium] 8.6 [floor hardness test]. . This test method evaluates the hardness of the floor by measuring the maximum acceleration (G value) when the head model is dropped on the floor. The smaller the G value, the more the impact is absorbed. Therefore, it can be said that the shock absorption performance is high and the safety (injury prevention performance) when hitting is high.
As the shock absorbing performance required by the wall surface protective material A according to the present invention, the floor hardness specified in the above JIS-A-6519 8.6 is assumed when the head is tumbled and hit the head. The maximum acceleration in the test is preferably 135 G or less, more preferably 120 G or less.
By the way, the maximum acceleration of the concrete floor is about 160G, and the floor vinyl sheet of 2.0mm thickness without the foam layer among the commercially available floor finish materials conforming to JIS A5705 [vinyl-based flooring] standard ( The maximum acceleration of JIS A 5705 [Vinyl flooring]: NC) is about 142G, and a 2.8 mm thick vinyl flooring sheet (JIS A 5705 [Vinyl flooring]): DC ) Is about 125G. The maximum acceleration of a newspaper newspaper (0.07 mm thick) that is folded four times is about 135 G, and the one that is folded eight times is about 120 G maximum acceleration.
[0011]
The impact absorbing performance and workability as the wall surface protective material A are not determined only by the foamed layer 1 but are also influenced by the thermoplastic resin surface layer 2 described later. That is, the impact absorbing performance of the wall surface protective material A includes the repulsive force of the resin foam layer 1, the strength (surface hardness, elasticity, etc.) of the resin surface layer 2 covering the surface of the resin foam layer 1, and the thickness of the resin surface layer 2. , Etc.
[0012]
The thermoplastic resin surface layer 2 covering the surface of the foam layer 1 is for imparting design strength as the wall surface protective material A and at the same time imparting surface strength and the like.
Examples of the thermoplastic resin used as the resin surface layer 2 include high density polyethylene, low density polyethylene, linear low density polyethylene, homopolypropylene, random polypropylene, block polypropylene, polybutene-1, ethylene and 3 or more carbon atoms. Copolymer resin with α-olefin, copolymer of ethylene and carboxyl group-containing monomer, olefin thermoplastic elastomer, styrene-olefin block copolymer, styrene elastomer, amorphous α-olefin resin, polyamide, polycarbonate, polystyrene , Polyoxymethylene, polyphenylene oxide, polysulfone, polyacrylate, acrylic resin, methacrylic resin, polyester, polyurethane, polyester elastomer, polyurethane elastomer, etc. A kind of thermoplastic resin, thermoplastic elastomer, or synthetic rubber such as butyl rubber, acrylic rubber, isoprene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, acrylic-styrene rubber, or hydrogenated products thereof, or Two or more types of synthetic resin mixtures can be mentioned, and plasticizers, stabilizers, fillers, colorants, flame retardants, antibacterial agents, antifungal agents, antistatic agents, processing aids can be used as necessary for these resins. An agent or the like may be added.
[0013]
The surface strength of the resin surface layer 2 is evaluated by adding the thickness to the surface hardness and scratch resistance related to the surface scratching performance, the tear strength and puncture impact strength related to the tear resistance, and the like. .
The thickness of the resin surface layer 2 is usually preferably in the range of 0.1 mm to 1.5 mm. If the thickness of the resin surface layer 2 is less than 0.1 mm, the required surface strength as the resin surface layer 2, particularly scratch resistance, cannot be maintained. The bending process at the time becomes difficult and the workability deteriorates.
[0014]
The surface hardness of the resin surface layer 2 is a surface hardness (20 ° C., after 15 seconds) measured by a rubber hardness meter (Shore D type hardness meter) in accordance with the standard of ASTM D 2240-86 [Test Method for Rubber Property-Durometer Hardness]. ), The range of 30-50 is preferable, and the range of 35-45 is more preferable. When the surface hardness of the surface layer 2 is increased, the surface scratching performance is improved, but on the other hand, as the surface hardness is increased, the flexibility becomes poor and the bending process at the time of construction becomes difficult and the workability is deteriorated. On the other hand, if the surface hardness (20 ° C., after 15 seconds) is lower than “30”, the surface scratching performance is remarkably lowered, and the function as the wall surface protective material A cannot be achieved.
Incidentally, when a vinyl chloride resin is used as the resin surface layer 2, 10 to 60 parts by weight, preferably 30 to 50 parts by weight of a plasticizer is added to 100 parts by weight of a vinyl chloride resin having a polymerization degree of 1000. When the sheet is calendered, its surface hardness (20 ° C, after 15 seconds) is in the range of 35 to 45, which can satisfy both requirements of surface scratching performance and ease of bending. It became.
[0015]
Moreover, evaluation of the scratch-resistant strength of the resin surface layer 2 was performed according to JIS-K-5400 8.4.1 [Tester method]. In this test method, the surface of the resin surface layer 2 formed into a sheet / film is measured by scratching with a pencil, and the scratch resistance of the resin surface layer 2 is preferably a hardness of B or more in pencil scratch value. More preferably, the hardness is H or higher. When the hardness is B or less, the surface scratching performance necessary for the resin surface layer 2 cannot be exhibited, and the function as the wall surface protective material A cannot be achieved.
[0016]
Further, the tear strength of the resin surface layer 2 is a strength required when an impact or the like is applied more excessively than other portions, such as the protruding corner portion of the wall surface, and in the present invention, JIS-K-6301. [Tear test]. In this test method, a resin molded into a sheet / film is torn from a right-angled part according to [B type] defined in JIS-K-6301 [9.2.1 Shape and dimension of test piece]. The strength is measured, and the tear strength of the resin surface layer 2 is preferably in the range of 65 to 100 N / mm, and more preferably in the range of 75 to 95 N / mm. When the tear strength of the resin surface layer 2 was in the range of 65 to 100 N / mm, the resin surface layer 2 having excellent tear strength and being easy to bend during construction was obtained.
[0017]
In addition, the puncture impact strength of the resin surface layer 2 is intended to measure the resistance to cracking caused by impact required when an impact or the like is applied more excessively than other portions such as the protruding corner portion of the wall surface. , ASTM D 256-84 [Test Methods for Impact Resistance of Plastics and Electrical Insulating Materials]. This test method measures impact puncture resistance and stiffness (stiffness) with a puncture tester, and can determine the relative contribution of crack resistance strength and stiffness (stiffness). The unit of intensity is represented by [N · mm]. The puncture impact strength of the resin surface layer 2 according to the present invention is preferably in the range of 35 to 75 N · mm, and more preferably in the range of 40 to 70 N · mm. If the puncture impact strength of the resin surface layer 2 is in the range of 35 to 75 N · mm, the resin surface layer 2 is excellent in crack resistance strength as a wall surface protecting material and is easy to bend during construction.
[0018]
Further, as shown in FIG. 1, the resin surface layer 2 may be formed as a single layer which is transparent, opaque or translucent as a whole, or as shown in FIG. 2, it is printed for the purpose of protecting the surface and preventing dirt. You may form in the composite layer which laminated | stacked the transparent or semi-transparent transparent layer 21 which consists of a thermoplastic resin on which the printing pattern of the said printing layer 22 can be visually recognized easily on the layer 22. FIG. The term “transparent” or “translucent” as used herein includes milky white, colored transparent, and a transparent layer mixed with fibers.
Then, by embossing the surface of the resin surface layer 2 or the surface of the transparent layer 21, it is possible to obtain the wall surface protective material A that is more excellent in design.
[0019]
In addition, the transparent layer 21 of the resin surface layer 2 can be blended with an inorganic or organic antibacterial agent and antifungal agent to impart antibacterial and antifungal properties. As prevention, antistatic properties can be imparted by a general technique such as mixing an antistatic agent in the transparent layer 21 or applying an antistatic coating. As a measure of antistatic property, the surface resistivity according to the test method of JIS-K-6911 5.3 [Resistivity] is 10 ¹³ Ω or less is preferable, preferably 10 ¹⁰ Ω or less.
[0020]
When the resin surface layer 2 is laminated integrally with the resin foam layer 1, the method is not particularly limited. For example, a heat laminating method, a dry laminating method using an adhesive, a wet laminating method, a hot melt laminating method, etc. It is possible to laminate by this method.
In this case, when the resin surface layer 2 and the resin foam layer 1 are made of the same kind of resin, it can be sufficiently laminated even by thermal lamination, but when the resin surface layer 2 and the resin foam layer 1 are made of different kinds of resins, adhesion is possible. A method using an agent is desirable. At this time, for example, when the resin surface layer 2 made of vinyl chloride resin and the resin foam layer 1 made of olefin resin are laminated with an adhesive (conversely, the resin foam layer 1 made of vinyl chloride resin is made of olefin resin. For the case where the resin surface layer 2 is laminated with an adhesive, the corona treatment or the primer treatment is preferably performed on the laminated surface of the olefin resin foam layer (or the surface layer). Examples of the primer include nitrile butadiene (NBR), styrene butadiene rubber (SBR), polyester, and urethane.
[0021]
Thus, in order to attach the wall surface protective material A according to the present invention to the surface of the wall surface B or to wrap around the side surface or the back side of the wall surface B, the usual vinyl copolymer resin system, vinyl acetate resin system, Adhesives such as EVA resin, acrylic resin, SBR, chloroprene, nitrile rubber, epoxy resin, polyurethane resin, hot melt (EVA, polyester, synthetic rubber) can be used. When sticking to the protruding and entering corners of the wall surface B, doors or door frames, or complex parts that are not flat, such as cabinets, the ability to follow the shape at the time of application is important. Power is required. Accordingly, the adhesive corresponding to the complicated shape portion is preferably chloroprene, nitrile rubber, polyurethane resin, or hot melt (EVA, polyester, synthetic rubber), and among them, chloroprene, nitrile rubber More preferred is an adhesive.
[0022]
As wall protection material A with excellent workability, it has good followability to complicated shapes such as wall corners and corners, doors, door frames, cabinets, etc., and it is especially entangled on the side edge or back side of wall panels. It is particularly important that the process can be easily performed, that is, it can be easily bent.
The workability of the wall surface protective material A, that is, whether or not the wall surface protective material A can be easily bent was evaluated by the following test method.
[Evaluation method for workability]
A test piece having a size of 100 mm × 25 mm is folded in two on a glass plate, and a weight of 500 g is applied to the folded portion for 30 seconds. Next, after removing the 500 g weight, a 50 g weight is placed on the tip portion of the test piece folded in two, and the time during which the weight is maintained without falling (holding time) is measured. Bending was performed in both the front and back bending directions, and a total of four measurements in the vertical and horizontal directions were taken as one sample. The test piece was cured for 24 hours in a constant temperature and humidity chamber of 20 ± 2 ° C. and 60 ± 5% RH.
When the above test was performed, those having a holding time of 15 seconds or more were easy to bend and excellent in workability, and those having a holding time of 30 seconds or more were easy to bend and were excellent in workability. When the holding time was less than 15 seconds, it was difficult to stick to a 90-degree corner of the wall surface during actual construction, and wrinkles occurred when bent. In addition, when the holding time was 15 seconds or more and less than 30 seconds, it could be bent and managed to be attached to the 90 ° corner portion of the wall surface. When the holding time was 30 seconds or more, the bending process could be easily performed, and it could be easily attached to the 90 ° corner portion of the wall surface.
[0023]
【Example】
Next, specific examples and comparative examples of the present invention will be described in more detail, but the present invention is not limited to these examples.
[0024]
<Example 1>
A vinyl chloride resin composition obtained by adding 45 parts by weight of a plasticizer, 15 parts by weight of a filler, 4 parts by weight of a stabilizer, and a coloring pigment to 100 parts by weight of a vinyl chloride resin having a polymerization degree of 1000 Rolled into a 0.8 mm thick sheet at a processing temperature of 175 ° C. with a molding machine to form a resin surface layer 2 and simultaneously a polyethylene resin sheet having the resin surface layer 2 expanded to 30 times the thickness of 2.0 mm Laminated on (resin foam layer 1) to obtain wall surface protective material A.
[0025]
<Example 2>
Using the same vinyl chloride resin composition as in Example 1, it was rolled into a 0.8 mm-thick sheet at a processing temperature of 175 ° C. with a calender molding machine to form a resin surface layer 2, and this resin surface layer 2 was thickened. Laminated on a vinyl chloride resin sheet (resin foam layer 1) foamed 3 times 2.0 mm to obtain a wall surface protective material A.
[0026]
<Example 3>
Using the same vinyl chloride resin composition as in Example 1, the sheet was rolled into a 0.55 mm thick sheet with a calendering machine at a processing temperature of 175 ° C. and printed with a surface gravure printing machine on the upper surface. A layer 22 is formed, and a vinyl chloride resin composition containing 20 parts by weight of a plasticizer and 3 parts by weight of a stabilizer with respect to 100 parts by weight of a vinyl chloride resin having a polymerization degree of 1000 is formed on the upper surface of the printed layer 22. A transparent layer 21 formed by rolling a sheet having a thickness of 0.25 mm at a processing temperature of 175 ° C. with a calendar molding machine is used as the resin surface layer 2, and a thickness of 2.0 mm is formed on the lower surface of the resin surface layer 2. Laminated on a polyethylene resin sheet (resin foam layer 1) foamed 30 times to obtain a wall surface protective material A.
[0027]
<Example 4>
A sheet of a polyolefin resin composition containing 30 parts of low density polyethylene (LLDPE) and a color pigment for 70 parts by weight of a partially crosslinked thermoplastic olefin elastomer at a processing temperature of 175 ° C. and a thickness of 0.8 mm using a calendar molding machine The wall surface protective material A was obtained by laminating the resin surface layer 2 on a polypropylene resin sheet foamed 30 times with a thickness of 2.0 mm.
[0028]
<Comparative Example 1>
A vinyl chloride resin composition obtained by adding 65 parts by weight of a plasticizer, 15 parts by weight of a filler, 4 parts by weight of a stabilizer, and a coloring pigment to 100 parts by weight of a vinyl chloride resin having a polymerization degree of 1000 A polyethylene resin sheet having a processing temperature of 175 ° C. and rolled into a sheet having a thickness of 0.1 mm by a molding machine to form a resin surface layer 2 and foaming the resin surface layer 2 five times to a thickness of 1.0 mm Laminated on (resin foam layer 1) to obtain wall surface protective material A.
[0029]
Regarding Examples 1 to 4 and Comparative Example 1, the impact-absorbing performance, surface strength, and workability of the obtained wall surface protective material A were evaluated. The evaluation results are shown in Table 1.
The evaluation criteria are as follows.
(Evaluation criteria)
<Shock absorption performance>
Measurement method: Maximum acceleration was measured according to JIS-A-6519 8.6.
◎ = G value is 120 or less
○ = G value exceeds 120 and is 135 or less
× = G value exceeds 135
<Surface strength>
(1) Surface hardness
Measuring method: The surface hardness (20 ° C., after 15 seconds) was measured by a rubber hardness meter (Shore D type hardness meter) according to ASTM D 2240.
○ = Surface hardness is 35 or more
X = Surface hardness is less than 35
(2) Scratch resistance
Measurement method: Measured according to JIS-K-5400 8.4.1 tester method.
○ = Pencil scratch value is more than hardness H
X = Pencil scratch value is hardness B or less
(3) Tear strength
Measurement method: JIS-K-6301 9. Measured according to the tear test method.
◎ = 75 to 95 N / mm
○ = less than 65 to 75 N / mm, over 95 N / mm to 100 N / mm
× = <75 N / mm, over 100 N / mm
(4) Puncture impact strength
Measurement method: ASTM D256 test method
◎ = 40-70N ・ mm
○ = 35 to less than 40 N · mm, over 70 N · mm to 75 N · mm or less
× = <35 N · mm, over 75 N · mm
<Workability>
The holding time by the evaluation method of workability was measured.
◎ = 30 seconds or more
○ = 15 seconds or more and less than 30 seconds
× = less than 15 seconds
[0030]
[Table 1]

[0031]
From the evaluation results in Table 1 above, when comprehensively evaluating the wall surface protection material A provided with impact absorbing performance, surface strength, and workability, those of Examples 1 to 4 are preferable as the wall surface protection material A. It can be said that Examples 1-3 are more preferable. Among these, when emphasizing impact absorbability as the wall surface protective material A, Example 2 is preferable, and when emphasizing workability, it can be said that Example 1 or Example 3 is preferable.
[0032]
【The invention's effect】
According to the wall surface protective material according to the present invention, it has a design property and surface strength as a wall surface material to be affixed to the inner wall surface of a building, and at the same time, has a required shock absorption performance and an injury prevention performance when hitting. It becomes.
In addition, the wall panel wraps around from the surface to the side edge or back side, and easily follows complicated corners such as the wall corners and corners, doors, door frames, cabinets, etc. The ease of construction is also good.
[0033]
Claims 2 According to the wall surface protective material according to the present invention, the thermoplastic resin surface layer is composed of a thermoplastic resin transparent layer and a thermoplastic resin printed layer, so that it exhibits excellent design characteristics that are not inferior to conventional wall materials. At the same time, the wall protective material is excellent in shock absorption performance, injury prevention and workability.
[0034]
Claims 3 According to the wall surface protection structure according to the present invention, the wall surface protection material is fixed to the surface of the wall surface panel so as to go around at least to the side edge, so that a wall surface protection structure using the wall surface protection material can be provided. It can be easily fixed by a construction method using a sticking technique such as wallpaper, and a wall surface protection structure excellent in surface strength, shock absorption performance and injury prevention performance can be obtained.
In addition, by adhering the wall surface protective material to the upper surface of the wall surface, the impact absorption performance is reduced (the maximum acceleration G value is reduced by 25 G or more) and the injury prevention performance can be greatly improved as compared with the conventional wall surface. .
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view illustrating an example of a state in which a wall surface protective material according to the present invention is attached to a wall surface.
FIG. 2 is a schematic cross-sectional view showing another embodiment of the wall surface protective material according to the present invention.
[Explanation of symbols]
A: Wall protective material B: Wall surface
1: Resin foam layer 2: Resin surface layer
3: Adhesive for fixing
21: Transparent layer 22: Print layer

Claims (3)

A wall surface protective material obtained by integrally laminating a thermoplastic resin surface layer on a thermoplastic resin foam layer, wherein the foam layer has a thickness of 1.0 to 3.0 mm and an expansion ratio of 2 to 30 times. The compression strength is 5 to 70 kPa, the thickness of the thermoplastic resin surface layer is 0.25 to 1.5 mm, the surface hardness is 30 to 50, the scratch resistance is not less than hardness B, and the tear strength is 65 to 100 N / mm. Wall protection characterized by a puncture impact strength of 35 to 75 N · mm, a bending holding time of 15 seconds or more, an overall thickness of 1.0 to 5.0 mm and a maximum acceleration of 135 G or less. Wood.   The wall surface protective material according to claim 1 or 2, wherein the thermoplastic resin surface layer comprises a thermoplastic resin transparent layer and a thermoplastic resin printed layer. A wall surface protection structure comprising the wall surface protection material according to claim 1 or 2 attached to a surface of a wall surface so as to wrap around at least to a side edge.

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