JPH04117748U - Decorative material with adhesive properties - Google Patents

Abstract

(57) [Summary] [Structure] In a decorative material in which a viscoelastic microporous membrane is laminated on the back side, adhesiveness is achieved by making the apparent density of the peripheral edge of the back microporous membrane higher than other parts. It is a decorative material with [Effect] By forming the peripheral edge of the back side to have a higher apparent density than the other back side parts, the adhesion of the edge area is reduced and the durability of the edge area is increased, resulting in excellent re-peelability. It has shape retention and durability, and can be easily attached and re-peeled repeatedly.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is suitable for indoor use such as carpets, mats, table covers, upholstery, wall coverings, etc. It is related to exterior decoration materials, and more specifically, decorations with excellent durability and adhesive properties. It is related to decorative materials.

0002

[Conventional technology]

Traditionally, floors are made of smooth surfaces such as wood boards, glass boards, or plastic boards. It can be pre-prepared in various shapes on surfaces, walls, partitions, etc. When cutting to a certain size and installing flooring or wall covering materials such as wallpaper, the flooring material Or, we often experience wall coverings shifting and making them look unsightly. That's true.

0003 Conventionally, as a means to prevent indoor and outdoor decorative materials from shifting, the floor For example, by interposing double-sided adhesive tape between the so-called adhering surface such as a surface or wall, A technique was used to attach and fix interior and exterior decorative materials.

0004 As mentioned above, the method using double-sided adhesive tape is effective for moving indoor and outdoor decorative materials. It is difficult to remove interior and exterior decorative materials from the surface to which they are attached, such as cleaning the surface to which they are attached. In order to fix the position again, it is necessary to apply new tape, which makes it difficult to use. This has the disadvantage of causing inconvenience and waste of tape.

[0005] Furthermore, there is a method for fixing interior and exterior decorative materials to the surface to which they are attached without using double-sided adhesive tape. Therefore, a method has been proposed in which a microporous membrane having viscoelasticity is interposed.

[0006] In other words, due to the viscoelasticity of the microporous membrane and the open micropores that make up the microporous membrane, Due to the synergistic effect with the suction cup action, it is possible to create an adhesive effect when bonding indoor and outdoor decorative materials, making it possible to Efforts have been made to prevent the internal and external decorative materials from shifting.

[0007]

[Problem that the idea aims to solve]

However, with conventional adhesive interior and exterior decoration materials that have a removable function, various Problems arise.

[0008] In other words, microporous material is laminated and adhered to the entire back surface, and the entire back surface has uniform adhesion. Therefore, stress is locally applied to the peripheral edge of the back surface due to multiple adhesion and peeling during actual use. It is easy to scratch, the back side is easily damaged, and eventually the removability is lost and the mounting is damaged. The peripheral edges of the decorative materials are rolled up, creating large gaps between indoor and outdoor decorative materials installed side by side. This creates a problem in that the appearance deteriorates and furthermore, it is difficult to arrange them side by side.

[0009]

[Means to solve the problem]

The decorative material with adhesive properties of the present invention has the following configuration in order to solve the above problems. Ru. In other words, in a decorative material with a viscoelastic microporous membrane laminated on the back side, Features: The apparent density of the peripheral edge of the microporous membrane on the back side is higher than that of other parts. It is a decorative material that has good adhesion properties.

0010 In this invention, materials that constitute the surface layer of the decorative material include paper, film, etc. A material made of fiber can be used. Fibers include natural fibers, synthetic fibers, and inorganic fibers. , various commonly used fibers and threads can be applied. More specifically, the surface part of the present invention Materials include synthetic fibers such as nylon, polyester, and polyacrylonitrile. Alternatively, natural fibers such as wool can be used.

[0011] Further, it may be either a knitted fabric or a nonwoven fabric. You can also use brushed materials such as these. I can list it. Furthermore, if the fabric has pile, the pile yarn is filament yarn. (including processed yarn) or spun yarn. On the other hand, the surface layer Pre-backing with synthetic rubber, synthetic resin, or natural rubber to secure the yarn. processing. Next, a microporous membrane is laminated.

0012 The decorative material of the present invention is made by cutting the sheet-like material obtained above into a desired size. Later, the apparent density of the peripheral edge of the backing layer is compared to the apparent density of other parts. By forming the backing layer at a different density, the outer edge of the backing layer is formed to have a different density. The problem of the prior art described above is solved by forming a difference in density. specifically When applying the backing layer of the decorative material, the apparent edge of the backing layer is By making the density higher than other parts, the adhesion of the peripheral part can be reduced, and furthermore, The strength of the film itself can be improved, so it can be repeatedly adhered and peeled off again. It is possible to easily impart releasability.

[0013] The apparent density of the peripheral edge and other parts of the back microporous membrane is preferably in the range of 0.20 to 0.30 g/cm ³ , and 0.25 to 0.28 g/cm ³ It is more preferable to set it in the range of .

[0014]The difference in apparent density between the peripheral edge and other parts is preferably 0.005 g/cm ³ or more, more preferably 0.01 g/cm ³ or more.

[0015] One way to change the apparent density is to change the foaming ratio of the microporous membrane. There are several ways to do this. Another method is to pierce the microporous membrane with a needle. Alternatively, the apparent density may be changed. The point is to improve the adhesion of the periphery to other parts. It may be different from the minute.

[0016] As a means to improve the durability of the peripheral edge, it is possible to reduce the adhesion and to make it microporous. It is necessary to improve the strength of the membrane itself.

[0017] By lowering the foaming ratio, the adhesion property decreases and the strength of the microporous membrane itself improves. do.

As the microporous membrane in the present invention, those made of resin compositions such as polyurethane resin, PVC resin, SBR resin, NBR resin, and silicone resin can be preferably applied. It is important that the material of the microporous membrane has a dynamic elastic modulus (log ₁₀ E') of 9.0 dyne/cm ² or less in the rubber region. A resin having properties higher than these has a large Young's modulus and a large modulus, and becomes hard.

[0019] On the other hand, the microporous membrane has a peak temperature of -50 to -10°C for dynamic loss E'', and a loss positive temperature of -50 to -10°C. It is important that the peak value of tan δ is 0.8 or less. This value is 0. If it exceeds 8, the pore structure of the microporous membrane made using it will collapse due to compression etc. There is a simple drawback.

[0020] Here, the peak temperature of the dynamic loss E'' is generally referred to as the glass transition point. Therefore, from the viewpoint of low-temperature characteristics, the temperature is preferably -50 to -10°C. Heat temperature of E″ is low The higher the value, the better, but there is a relationship with heat resistance, and if it is too low, the heat resistance will inevitably decrease. However, problems occur during practical use. On the other hand, at temperatures above -10°C, low temperature curability generally occurs. becomes large, which is not desirable.

[0021] Note that the viscoelastic properties in the present invention were measured by the following method.

<Viscoelastic properties> The dynamic elastic modulus (log ₁₀ E'), loss tangent (tan δ), and peak temperature of dynamic loss E'' were measured.

[0023] Further, the microporous membrane in the present invention has a maximum diameter of 3 to 250 microns, preferably consists of micropores with a diameter of 20 to 100 microns, and extends from the surface to the back of the microporous membrane. Preferably, it has a large number of fine holes passing through it.

[0024] The thinner the microporous membrane is, the more flexibility it has, which is desirable. deer Preferably, one with a thickness of 0.1 mm or more is selected from the viewpoint of adhesion to the wall surface. . However, if the thickness exceeds 10.5 mm, flexibility and adhesion will be impaired. Ma In addition, the open pore area occupying the entire surface of the microporous membrane is preferably 20% or more.

[0025] Here, the apparent density difference is applied before or after cutting the sheet material, or at the same time. Although it can sometimes be done, it is usually done on decorative materials cut to the desired size. For example, the foaming ratio may be different locally only in the necessary areas around the peripheral edge of the backing layer. A method of supplying a compounded resin liquid and/or applying shear locally, heating, and pricking. This can be easily done with etc.

[0026] Hereinafter, the decorative material of the present invention will be explained according to the drawings.

[0027] FIG. 1 is a cross-sectional view illustrating the structure of the decorative material of the present invention.

[0028] As shown in Figure 1, in the decorative material of the present invention, the peripheral edge of the backing layer is A higher apparent density portion 5 is provided than the back surface portion, and this high apparent density portion 5 is It has a higher apparent density than the back side, and is hard and strong.

[0029] The width (depth) of the high apparent density portion 5 can be determined depending on the size of the adhesive interior and exterior decoration material. Although it can be selected arbitrarily, it is desirable that the total width be in the range of 3/5 to 1/20. 3/5 If it exceeds the limit, the degree of decrease in adhesion will be too great, and it will be difficult to re-peel the adhesive and remove it repeatedly. Decreased release function. Also, if the width is too small and becomes less than 1/20, there is a re-peel function. , the improvement effect on shape retention properties is unsatisfactory, and furthermore, the peripheral edges tend to stick, causing damage. This is not preferable because it may become easily damaged.

[0030] Hereinafter, the present invention will be further explained based on Examples.

[0031]

【Example】

Example 1 A cut pile gray fabric having a pile height of 8.2 mm and a pile weight of 1350 g/m ² was obtained using a tufting machine using 1600 denier 2-strand nylon-BCF as the pile yarn. Next, this gray fabric was dyed with an acid dye, and subsequently, a latex containing SBR as a main component was applied to the back side of the gray fabric and dried at 130° C. for 20 minutes (amount of SBR applied: 420 g/m ² ). On the other hand, 100 parts by weight of polyester polyurethane (solid content 50%), 10 parts by weight of a fatty acid salt activator as a foaming agent, and 3 parts by weight of water-soluble epoxy as a crosslinking agent were mixed, and this mixture was mechanically mixed with a foaming machine. Compounded resins with different foaming expansion ratios were prepared.

This product was applied to the back of the carpet pre-coated with the above SBR as shown in Figure 1, and then heat treated at 120°C for 15 minutes → 160°C for 5 minutes, resulting in a foaming ratio of 3.2 times (the symbol in Figure 1). 6) and a foaming ratio of 2.2 times (the part numbered ⁵ in Figure 1). .27 g/cm ³ ) and a foamed polyurethane film having a coating thickness of 2.8 mm was obtained.

[0033] Next, the above carpet was cut into a size of 50 x 50 cm ² to obtain a tile-like fiber flooring material in which the edge ends on two sides of the backing layer were 15 mm wide and had a high apparent density.

[0034] On the other hand, as a comparative product, except for the backing layer with a foaming ratio of 3.2 times, A tile-like fiber flooring material with exactly the same specifications as the example was manufactured.

[0035] The above two types of tile-like fiber flooring materials were installed for 12 months and stopped once every two weeks. Repeat adhesion and peeling, and observe the re-peelability and the condition of the peripheral edge of the backing layer. The durability was then compared. The results are shown in Table 1.

[0036]

[Table 1]

Here, ○: No damage/decrease △: Slight damage/decrease ×: Significant damage/decrease From the results in Table 1, it can be seen that the tile-like fiber flooring material, which is the decorative material of the present invention, has a sustained removability function. It is also clear that the durability of the peripheral edge of the backing layer is excellent. Example 2 A moquette gray fabric having a total basis weight of 680 g/m ² was obtained using 150D-76f polyester fiber. Next, this gray fabric was dyed with a disperse dye, and subsequently, a latex containing SBR as a main component was applied to the back side of the gray fabric and dried at 125° C. for 32 minutes (amount of SBR applied: 180 g/m ² ).

[0038] On the other hand, 100 parts by weight of polyester polyurethane (solid content: 54%), crosslinking agent 3 parts by weight of water-soluble epoxy was mixed and this mixture was mechanically foamed using a foaming machine. The blended resin was adjusted. Apply this to the back of the moquette that has been pre-coated with the above SBR. Then, heat treatment was performed at 125℃ for 16 minutes → 165℃ for 3.5 minutes to increase the foaming ratio. A moquette with a polyurethane foam of 2.3 mm and a ratio of 3.0 times was obtained.

Next, the above-mentioned moquette was cut into 90×120 cm ² pieces, and the portions other than the edge width of 25 mm on the four sides of the backing layer were pricked multiple times with a needle having a diameter of 0.5 mm. I got it. The apparent density of the pricked portion was 0.24 g/cm ³ , and the apparent density of the other portion was 0.29 g/cm ³ .

[0040] On the other hand, as a comparative product, a tile with exactly the same specifications as the above example except for not being pricked We made a prototype moquette.

[0041] The above two types of tile-shaped moquettes were placed side by side on wooden wall coverings for 12 months, and once every two weeks, Repeated adhesion and peeling, re-peel function, peripheral edge of backing layer We observed the condition and compared the durability. As a result, tiles, which are the decorative material of this invention. The durability of the removable function and the durability of the peripheral edge of the backing layer are clear for the shaped moquette. It was clearly superior.

[0042]

[Effect of the idea]

The decorative material of the present invention is designed so that the peripheral edge of the back surface has a higher apparent density than the other back surface parts. This reduces the adhesion of the edges and increases the durability of the edges. Therefore, it has excellent removability, shape retention, and durability, and can be easily repeated. It can be fixed and removable.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view illustrating the structure of a decorative material with adhesive properties according to the present invention.

[Explanation of symbols]

1: Pile 2: Base fabric 3: Pre-backing layer 4: Backing layer 5: High apparent density part 6: Low apparent density part

Claims (2)

[Scope of utility model registration request] 1. A decorative material in which a viscoelastic microporous membrane is laminated on the back surface, characterized in that the apparent density of the peripheral edge of the back microporous membrane is higher than other parts. Decorative material with sexual characteristics. 2. The apparent density of the peripheral edge and other parts of the back microporous membrane is in the range of 0.20 to 0.30 g/cm ³ , and there is an apparent density difference between the peripheral edge and the other parts. is 0.0
2. The decorative material having adhesion properties according to claim 1, wherein the decorative material has an adhesion property of 0.05 g/cm ³ or more.