JP2019184826A - Low adhesive decorative board, bulletin board using the same, and its using method - Google Patents

Abstract

To provide a low adhesive (low tackiness) decorative board which various paper sticky objects are pasted on or peeled from many times without using a fastener such as a pushpin or tape.SOLUTION: A decorative sheet 12 having printed various patterns is pasted on the whole surface of a woody substrate 10 via an adhesive 11. The whole surface of the decorative sheet 12 is solid-coated with a re-peeling-type acrylic copolymer aqueous emulsion adhesive 13. A coated film of the acrylic copolymer aqueous emulsion adhesive 13 is covered with a transparent separator 14 from the front side.SELECTED DRAWING: Figure 1

Description

  The present invention is a low-priced material that can be pasted and peeled many times without using thumbtacks, tapes, magnets, or other fasteners. The present invention relates to an adhesive (low tack) decorative board, a bulletin board that is suitable for schools, stations, and other public facilities using the same, and its usage.

  In general, public information papers (announcements), photographic paper, posters, flyers, and other postings made of paper are attached to bulletin boards with fasteners such as pushpins or tape. There is a problem that holes and dirt remain on the bulletin board, and the dirt and scratches are also given to the posted material.

  In addition, fasteners such as the thumbtack, tape, magnet, etc. are only to partially hold the posting in a scattered distribution state, so that it floats (expands) or undulates with air. It is easy to obtain a stable holding state that is in close contact with the bulletin board.

  This becomes more noticeable as the area of the bulletin board becomes larger, and for example, when it becomes a large size for one tatami mat, its installation and removal become complicated, and the work cannot be done easily and smoothly by one person. It may happen that the fasteners are dropped and lost.

  Furthermore, if the posting is an origami work at a school, for example, if it is pressed with the fasteners, the work itself is partially hidden or flattened, making it unsightly. Therefore, a good display condition cannot be obtained.

  On the other hand, in order to give added value to decorative plates that are widely handled as building materials and to expand their uses, in recent years, for example, decorative plates that are resistant to contamination, decorative plates that are resistant to scratches, and decorative plates on which magnets are magnetically attached, Various decorative boards such as decorative boards that can be written with a pen and can be erased, cork boards that can fix objects to be adhered, etc. are commercialized, but the above fasteners are not required, only by the adhesiveness provided on the surface of the above, A decorative board that can stick or peel off the adherend many times has not been developed yet.

  In this respect, direct paper or laminated paper (2) can be applied to the non-magnetized surface of the sheet magnet (1) so that plain paper such as copy paper can be pasted or peeled off without using fasteners such as push pins and magnets. ), A simple board material provided with a slightly adhesive layer (3) is disclosed in Patent Document 1.

  Moreover, in order to facilitate the peeling work, a pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive is applied to the surface of the base paper (11) in a dot shape is described in Patent Document 2.

  Furthermore, the pressure-sensitive adhesive is applied to the surface of the foamed plastic substrate (1) in the form of a dot pattern so that the initial tack can be substantially eliminated and the posting can be moved along the surface of the adhesive portion. A coated bulletin board is disclosed in Patent Document 3.

Utility Model Registration No. 3049912 JP 2000-319604 A Japanese Patent No. 5108452

  However, the simple board material described in Patent Document 1 uses a sheet-like magnet (1) as a base material, and is fixed to the steel board (6) by the attractive force of the magnet (1). Without the steel board (6), it cannot be used. Therefore, it is impossible to handle the simple board itself as a building material and embed it on the wall of the building.

  In addition, in the configuration in which the laminated paper (2) is covered on the surface of the sheet-like magnet (1), when the flat roll is extended from the wound roll state, the outer diameter difference between the two layers made of the different materials is increased. Therefore, if the sheet is bent and extended, wrinkles may occur.

  Further, the pressure-sensitive adhesive sheet described in Patent Document 2 is also a sheet literally, and has a two-layer configuration in which the base paper (11) is covered with the release paper (13). There is a risk of wrinkles. For the prevention, if the pressure-sensitive adhesive sheet as the product is bonded to the surface of the plate material, a special processing cost is required.

  On the other hand, the bulletin board described in Patent Document 3 is not the pressure-sensitive adhesive itself, and the initial tack is minimized by the application method, so even if the base material (1) made of foamed plastic is adopted. After all, special devices are required for the coating method and the coating apparatus.

  In short, as described above, the decorative board that gives the added value of low adhesiveness has not been developed yet.

  In addition, just in case, a decorative sheet that is widely handled as a building material has a decorative sheet affixed to the surface of the wooden substrate via an adhesive, but in order to provide the necessary surface properties, The surface of the decorative sheet is provided with a transparent top coating (clear coating), and as a result, it is no longer possible to perform coating or adhesion as a further processing on the surface-finished coating layer.

  The present invention aims to provide a novel low-adhesive decorative board useful for solving the above-mentioned problems. For this purpose, in claim 1, a decorative sheet on which various patterns are printed is attached to the entire surface of a wooden substrate via an adhesive. As well as

  A re-peelable acrylic copolymer aqueous emulsion pressure-sensitive adhesive is applied to the entire surface of the decorative sheet in the form of a film, and the coating film is covered with a transparent separator.

Further, characterized in that the coating amount of claim 2 in the acrylic copolymer aqueous emulsion adhesive was set to ^{2.0g / 0.18m 2 ~4.0g / 0.18m 2} .

  In claim 3, in using the low-adhesion decorative board according to claim 1 as a bulletin board as it is, after posting the posting from the front side to the adhesive coating film exposed by peeling of the separator, the posting is It coat | covers by sticking of the said separator, It is characterized by the above-mentioned.

  In claim 4, as a bulletin board, a decorative sheet on which various patterns are printed is attached to the entire surface of the wooden substrate via an adhesive, and a releasable acrylic copolymer aqueous emulsion is applied to the entire surface of the decorative sheet. A frame that surrounds the mouth end of the low-adhesion decorative board formed by solidly applying an adhesive is attached.

  In claim 5, as a bulletin board, a decorative sheet on which various patterns are printed is attached to the entire surface of the wooden substrate via an adhesive, and a releasable acrylic copolymer aqueous emulsion is applied to the entire surface of the decorative sheet. The present invention is characterized in that a sash frame of a transparent opening / closing window that covers a coating film of the adhesive from the front side is attached to a low-adhesion decorative board formed by solidly applying an adhesive.

  Further, in claim 6, a decorative sheet on which various patterns are printed is pasted on the entire surface of the wooden substrate via an adhesive as a bulletin board, and a re-peelable acrylic copolymer is applied to the entire surface of the decorative sheet. The low-adhesive decorative board, which is solidly coated with a combined aqueous emulsion adhesive, is designed to be affixed to and integrated with the base wall as an interior wall material of at least one tatami mat embedded in the wall of the building. To do.

  According to the configuration of claim 1, since it is a low-adhesion decorative board in which a re-peelable acrylic copolymer aqueous emulsion adhesive is solid-coated on the entire surface of the decorative sheet, the separator masking the coating film It is possible to stick the entire surface of various adherends made of paper to the adhesive surface exposed by peeling, and to keep it in a stable display state, which requires a conventional fastener As a result, there is no risk of giving unsightly marks such as holes, scratches, and dirt due to the use of the fastener to the adherend.

  In addition, by sticking the entire surface of various adherends to the above-mentioned adhesive coating film, despite being kept in a stable display state that does not cause partial lifting (expansion) or unauthorized deformation, It can also be easily peeled off by manual operation, and can be repeatedly pasted and peeled off. For example, it is necessary to frequently repost postings that are posted only for a certain period such as one week, one month, or summer. It is extremely useful as a bulletin board.

  Furthermore, since the above adhesive is solid-coated on the entire surface of the decorative sheet bonded with a wooden material as a substrate, the adhesive is applied to a special dot pattern like the adhesive sheet listed at the beginning as a conventional example. Therefore, it is possible to mass-produce the low-adhesion decorative board at a low cost by using a conventional decorative board manufacturing apparatus.

  In that case, if the structure of Claim 2 is employ | adopted, the peeling strength (adhesive force) of a to-be-adhered thing can be exhibited appropriately according to the setting numerical value range of the coating amount in the said adhesive, and it is too weak. There is an effect capable of preventing the natural peeling of the adherend to be caused and the damage of the adherend due to the excessively strong reverse.

  In particular, if the configuration of claim 3 is adopted, the transparent separator provided in the low-adhesive decorative board is not peeled off and discarded at the time of attaching the posting, and is used after the posting of the posting. By covering the posted material and the coating film (adhesive surface) of the pressure-sensitive adhesive as a whole, there is an effect that the dustproof state can be maintained.

  If the structure of Claim 4 is employ | adopted, there exists an effect which can use the low-adhesion decorative board of Claim 1, and can provide the versatile favorable-looking bulletin board in which the mouth end surface was surrounded by the frame.

  Further, if the structure of claim 5 is adopted, the adhesive film is kept in a dust-proof state by the opening / closing window using the low-adhesion decorative board according to claim 1, and is applied to the film. There is an effect that it is possible to provide a transparent bulletin board with attached bulletin board.

  Furthermore, if the configuration of claim 6 is adopted, the low-adhesion decorative board according to claim 1 is used as an interior wall material of at least one tatami mat, and one or a plurality of parallelly mounted walls are embedded in the wall surface of the building. Therefore, by sticking and fixing to the basement wall of the building, it is possible to build a wide bulletin corner that is suitable for school classrooms and station passages, for example.

  In addition, in this case, since the various patterns preliminarily printed on the decorative sheet are in a state that can be seen through the pressure-sensitive adhesive that is solidly applied to the entire surface of the pattern, no postings are attached to the posting corner. Even if this happens, there is no risk of hindering the cosmetic effect of the wall surface, and an elegant appearance can be maintained.

It is a perspective view which shows the low adhesion decorative board which concerns on embodiment of this invention. It is an expanded sectional view of FIG. It is explanatory drawing which shows the primary manufacturing process of the said low adhesion decorative board. It is explanatory drawing which shows the secondary manufacturing process following FIG. It is explanatory drawing which shows the usage as a bulletin board. It is a schematic perspective view which shows the usage example as a welcome board. It is a schematic slope view which shows the usage example as a bulletin board. It is a schematic slope view which shows another example of use as a bulletin board. It is a 9-9 line expanded sectional view of FIG. It is explanatory drawing which shows how to affix or peel off a posting thing. It is a front view which shows the bulletin board attached and constructed on the wall surface of the classroom in a school. It is a front view which shows the posting corner similarly attached to the wall surface of the classroom in a school. It is a 13-13 line expanded sectional view of Drawing 12.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. As clearly shown in the slope view of FIG. 1 and the enlarged cross-sectional view of FIG. 2, the low-adhesive decorative board (A) according to the embodiment is coated with an adhesive (11) on the entire surface of the wooden substrate (10). Affixing a coat-type decorative sheet (12) and applying a re-peelable acrylic copolymer aqueous emulsion adhesive (13) to the entire surface of the decorative sheet (12), the adhesive (13 ) Coating film (adhesive surface) from the front side with a transparent separator (14).

  If the low-adhesive decorative board (A) is made into a large product size (for one tatami mat) of, for example, thickness: 5.5 mm × width: 910 mm × length: 1820 mm, the building material (interior wall material) (M ) Can be embedded into the wall of the building (built), but cut to a smaller size than this and used as an indoor bulletin board (exhibition board) (B), welcome board (C), photo stand, etc. It is also possible to do. This point will be described in detail later.

  The wood substrate (10) of the low-adhesive decorative board (A) is made of MDF (medium fiber board), particle board, plywood, etc., and it is particularly preferable to employ domestic todomatsu and other softwood plywood. This is because the specific gravity of the low-adhesive decorative board (A) is low, and handling and processing at the site can be easily performed. In the illustrated example, a three-ply (thickness: 5.5 mm) Todomatsu plywood is shown.

  Moreover, an emulsion adhesive is used as the adhesive (11) for attaching the decorative sheet (12).

The decorative sheet (12) is a reinforced paper or impregnated paper having a weight of 23 to 80 g / m ² on which various patterns (designs) such as a wood grain pattern, a block pattern, an abstract pattern, and a cork pattern are printed (color printing). By adopting such a base sheet having inter-paper strength, the delamination of the decorative sheet (12) is performed when the adherend (15) is peeled from the low-adhesive decorative board (A). Will not start. It is desirable to keep the peel strength between the papers at 0.4 N / mm ² or more.

The re-peelable acrylic copolymer aqueous emulsion pressure-sensitive adhesive (13) comprises the following components (A) and (B) at a ratio of (A) / (B) = 5/95 to 50/50 (weight ratio). The pressure-sensitive adhesive composition contained in
(A) A (meth) acrylic polymer having a tetrahydrofuran insoluble content of 90% by weight or more and a glass transition temperature of −50 ° C. to −20 ° C.
(B) The content ratio (B1 / B2 / B3) of ethylene (B1) / vinyl acetate (B2) / vinyl neodecanoate (B3) is 2-25 / 10-70 / 10-88 (however, three components) Terpolymer of ethylene-vinyl acetate-vinyl neodecanoate in a range of 100).

  The re-peelable acrylic copolymer aqueous emulsion pressure-sensitive adhesive (13) comprises a specific (meth) acrylic polymer and a specific ethylene-vinyl acetate-vinyl neocadenoate ternary copolymer, Since it is used at a specific blending ratio, it can exhibit self-adhesiveness and low tackiness, and its adhesive when the adherend (15) is peeled off from the low-adhesive decorative board (A). (13) does not transfer to the adherend (15) (so-called glue transfer) and does not contaminate the adherend (15). As a result, it is effective in the production of the low-adhesion decorative board (A) capable of repeating the peeling and pasting of the adherend (15) many times.

  However, the re-peelable acrylic copolymer aqueous emulsion pressure-sensitive adhesive (13) may be a (meth) acrylic acid alkyl ester copolymer aqueous emulsion pressure-sensitive adhesive composition.

  That is, an aqueous pressure-sensitive adhesive composition containing adhesive microsphere particles and microparticles formed from an acrylic copolymer and a viscosity modifier, and in particular, the glass transition temperature of the microparticles is 0 ° C. or less. In addition, a pressure-sensitive adhesive composition in which the viscosity adjusting agent is composed of an ionic viscosity adjusting agent and a nonionic viscosity adjusting agent is employed.

  The re-peelable acrylic copolymer aqueous emulsion pressure-sensitive adhesive (13) comprising the water-based pressure-sensitive adhesive composition containing such pressure-sensitive microsphere particles is preferably a pressure-sensitive adhesive having a volume average particle diameter of 20 to 50 μm. Concavities and convexities formed on the coating film (adhesive surface) by the conductive microsphere particles contribute to the reduction of the contact area with the smooth adherend (15) and maintain the removability of the adherend (15). In addition, since it can be solid-coated by a roll coater or other means, it is useful for the production of the low-adhesion decorative board (A).

  In any case, the acrylic copolymer aqueous emulsion pressure-sensitive adhesive (13) is a milky white or white milky liquid, but when dried and solidified, it becomes colorless and transparent. Therefore, the various printed on the decorative sheet (12) There is no possibility that the pattern (design) is concealed by the coating film, and that is also effective in manufacturing the low-adhesion decorative board (A).

Moreover, the appropriate range is set to 2.0-4.0g / 0.18m < ² > also about the application quantity of any said re-peelable type acrylic copolymer aqueous emulsion adhesive (13). The amount of adhesive applied and the peeling strength (adhesive strength) are in a proportional relationship. When the amount of adhesive (13) applied exceeds 4.0 g / 0.18 m ² , the peeling strength is too strong, and the above low adhesion When the adherend (15) is peeled off from the decorative board (A), the adherend (15) may be damaged. On the other hand, the amount of the adhesive (13) applied is 2.0 g / 0.18 m. ^If it is less than ² , the peeling strength is too weak, and the adherend (15) may spontaneously peel off from the low-adhesive decorative board (A) due to its own weight, wind, or other force majeure, and may fall.

  In addition, even if the environment where the low-adhesion decorative board (A) is used is indoors, the above-mentioned appropriate peeling strength cannot be maintained depending on conditions such as a place exposed to direct sunlight or a place exposed to cold air. In addition, since there is a possibility that the adherend (15) may be spontaneously peeled off, it is desirable to employ an acrylic copolymer aqueous emulsion adhesive (13) that is particularly excellent in heat resistance and cold resistance.

  Furthermore, the separator (14) may be a transparent film, but it is preferable to employ an OPP film (biaxially stretched polypropylene film) that does not expand and contract and is not siliconized. This is because if the releasability is strong, it will peel off naturally from the pressure-sensitive adhesive (13) and the masking function cannot be achieved.

  In manufacturing the low-adhesion decorative board (A) of the above embodiment, first, as shown in the primary manufacturing process of FIG. 3, starting from the wooden substrate (plywood) (10), roll to the entire surface. An adhesive (emulsion adhesive) (11) is applied by a coater (16), and then the moisture content of the adhesive (11) is adjusted through a drying furnace (17).

  Then, the decorative sheet (12) on which various patterns (designs) are printed in advance is pasted from the front side (above) to the coating film (adhesive surface) of the adhesive (11) by the laminator (18). A semi-finished product (intermediate product) (a) of a decorative board is produced, that is, the surface is uncoated. This is different from a conventional decorative board that is completed by applying a transparent top coating (clear coating) to the surface of the decorative sheet (12).

  Next, as shown in the secondary manufacturing process of FIG. 4, starting from the semifinished product (intermediate product) (a) of the decorative plate, the roll coater (16) is applied to the entire surface of the decorative sheet (12). The re-peelable acrylic copolymer aqueous emulsion pressure-sensitive adhesive (13) is applied, and then the water content of the pressure-sensitive adhesive (13) is adjusted in a drying furnace (17).

  Then, a transparent separator (14) is attached from the front side (upper side) to the coating film (adhesive surface) of the acrylic copolymer aqueous emulsion adhesive (13) by a laminator (18), and the product-low adhesive decorative board ( Completed as A). About the application quantity of the adhesive (13), it is as having already demonstrated.

  In that case, as is known from the comparison between FIG. 3 and FIG. 4, the primary production process until the decorative board semi-finished product (intermediate product) (a) is obtained, and then the re-peelable acrylic co-polymer. The secondary manufacturing process completed as a low-adhesive decorative board (A) by attaching the separator (14) via the polymer aqueous emulsion adhesive (13) is performed using a manufacturing apparatus having the same function. Since it can be executed, it is not necessary to prepare a new special manufacturing apparatus, and an excellent mass production effect can be obtained.

  Needless to say, the primary production process of FIG. 3 and the secondary production process of FIG. 4 are separately installed as production lines.

  Since the low-adhesion decorative board (A) of the above embodiment has a re-peelable coating film (adhesive surface) with a re-peelable acrylic copolymer aqueous emulsion pressure-sensitive adhesive (13), this is shown in FIG. Used as a bulletin board (B) as it is, various paper covers such as copy paper (plain paper), posters (coated paper), thermal recording paper (receipt), recycled paper, photo paper, drawing paper, flyers, laminate film, and other papers. Adhesives (15) can be pasted and peeled off many times as postings, and traces such as holes, scratches and dirt due to the use of special fasteners are posted on the postings (15) and bulletin boards There is no risk of giving to (B).

  In that case, the low-adhesion decorative board (A) employs plywood, MDF, particle board, and other wood materials as its substrate (10). In addition to B), it can also be used as a photo frame or a welcome board (C) as shown in FIG.

  Further, as shown in FIG. 5, the whole or a part of the transparent separator (14) was turned up, and the post (15) was attached to the exposed coating film (adhesive surface) of the adhesive (13). Thereafter, the separator (14) may be restored to the coated state again.

  Then, it is possible to prevent dust and the like from adhering to the coating film of the pressure-sensitive adhesive (13), and to the transparent separator (14) in the covering state of the posting (15) from the front side (above) It is also possible to add a character (19) with a whiteboard marker or the like, or erase the character (19) with a cloth or tissue paper.

  Dust adhering to the coating film (adhesive surface) of the adhesive (13) should be thoroughly dried by squeezing a clean cloth that has been wetted with water (a small amount of water), and then gently wiping with the cloth. Then, the coating film (adhesive surface) exhibits its original performance and can be used without any trouble.

  Further, when the bulletin board (B) is formed from the low-adhesive decorative board (A), the wooden face of the decorative board (A) is surrounded by a frame (20) or a mounting frame (not shown) on the wall as shown in FIG. 7 or a stand (21) for moving as shown in FIG. 7 or a pedestal fixing pillar (not shown), or a sash frame (22) of a transparent opening / closing window (22) as shown in FIGS. 23) can be attached and various accessory configurations can be added. (24) is a corner mounting bracket to the wall surface. Although the sliding door type is shown in FIGS. 8 and 9 as the opening / closing window (22), there may be a revolving door type centering on a pivot hinge.

  In any case, the low-adhesion decorative board (A) is formed only by the coating film (adhesive surface) of the re-peelable acrylic copolymer aqueous emulsion adhesive (13) formed on the entire surface as the face material. Since the posting (15) can be pasted or peeled off, even if the posting (15) has a large area, it can be wound by one person as shown in FIG. It can be pasted so as to be expanded and deployed from the bending roll state, and conversely, it can be peeled so as to be bent from the flat developed state, which is also useful for improving workability.

  In addition, since the entire surface of the posting (15) adheres to the coating film (adhesive surface) of the pressure-sensitive adhesive (13), there is no risk of causing floating (expansion) or deformation during use, and a stable adhesion state. As a result, it is possible to display a post (15) such as a plurality of sheets of paper such as a calendar or a folded (overlapping) paperwork without any trouble. Nevertheless, it is convenient because it can be easily and smoothly peeled off as described above.

  In particular, the low-adhesive decorative board (A) also includes a decorative sheet (12), and various patterns (designs) printed on the decorative sheet (12) can be seen through the coating film of the adhesive (13). Therefore, for example, by manufacturing this as a large size for one tatami mat, it is handled as a building material (interior wall material) (M). It is possible to embed (build) a plurality of sheets in parallel in the whole or part of the wall surface (W) in passageways, other various public facilities, large commercial facilities (shopping centers), cultural halls, etc. A vast bulletin board (posting corner) (B) suitable for a place where many people gather. In FIGS. 12 and 13, reference numeral (25) denotes a building base wall, (26) a hidden nail for further fixing the interior wall material (M) attached to the base wall (25), and (27 ) Indicates a locker.

  In that case, even if the bulletin board (B) has no posting (15) and is not in use, the various patterns (designs) of the low-adhesive decorative board (A) are seen through from the front side (above). Therefore, the makeup effect as the building material (interior wall material) (M) can be exhibited.

[Example 1]
Low-adhesive decorative board (A) in which the trade name “Likabond AP-96” of Japan Coating Resin Co., Ltd. was used as the re-peelable acrylic copolymer aqueous emulsion adhesive (13), and only the coating amount was changed. Free sample No. 1-4 were manufactured by the said manufacturing method of FIGS. 3, 4 and the peeling strength test was done by the following method.

  That is, the sample No. of the low adhesive decorative board (A). Each of 1-4 was cut into the same 25 mm-wide strip, and the peel strength when the copy paper affixed to the surface (adhesive surface) was peeled off at an angle of 180 degrees was measured. The measured values in Table 1 showing the results are integrated average values obtained in triplicate.

According to the evaluation in Table 1, it was confirmed that there was a proportional relationship between the coating amount of the pressure-sensitive adhesive (13) and the peeling strength (adhesive strength). Free sample No. When the coating amount is 1.0 g / 0.18 m ² as in 1, the peeling strength is 0 (zero) N / 25 mm, which cannot be adopted.

On the other hand, the free sample No. When the coating amount is 4.0 g / 0.18 m ² as in No. 4, there is a peeling strength of 2.58 N / 25 mm. If the amount is increased further, the peeling strength becomes too strong, and the adherend (15) is damaged at the time of peeling. Therefore, the coating amount of 2.0 to 4.0 g / 0.18 m ² is an appropriate numerical range in the production of the low-adhesion decorative board (A).

  Moreover, in order to perform an environmental test, the surface (adhesive surface) of the low-adhesive decorative board (A) which applied the above-mentioned brand name "Likabond AP-96" which is also an acrylic copolymer aqueous emulsion adhesive (13). In addition, a total of 8 types of adherends (15) are pasted and left standing for 24 hours under five different temperature environments, and then the pasted state of the adherends (15) is maintained. I checked. Thereafter, the adherend (15) was peeled off, and tearing or glue transfer of the adherend (15), ink transfer to the adhesive surface, paper remaining, and other conditions were also confirmed. The results are shown in Tables 2a to 2e.

  According to the results of Tables 2a to 2e, the pasted state of the adherend (15) was maintained and natural peeling did not occur even though 24 hours passed in all temperature environments, but the adherend (15 ) Type (paper quality), the relationship between the temperature and the coating amount, and other conditions, there were also cases where problems could occur in the state of peeling.

  There are no problems with copy paper, calendar, laminate film, and photographic paper under any temperature environment. For items that may cause such problems, Table 2a to Table 2e can be used as selection data for applications. .

[Example 2]
Low-adhesive decorative board (A) in which the trade name “Nicazole B-8815” of Nippon Carbide Industries Co., Ltd. was used as the re-peelable acrylic copolymer aqueous emulsion adhesive (13), and only the coating amount was changed. Free sample No. 1-4 were manufactured by the said manufacturing method of FIGS. 3, 4 and the peeling strength test was done by the following method.

  That is, the sample No. of the low adhesive decorative board (A). Each of 1-4 was cut into the same 25 mm-wide strip, and the peel strength when the copy paper affixed to the surface (adhesive surface) was peeled off at an angle of 180 degrees was measured. The measured values in Table 3 showing the results are the integrated average values obtained in triplicate.

According to the evaluation of Table 3, it was confirmed that there was a proportional relationship between the coating amount of the pressure-sensitive adhesive (13) and the peeling strength (adhesive strength). Free sample No. When the coating amount is 1.0 g / 0.18 m ² as in 1, the peeling strength is 0 (zero) N / 25 mm, which cannot be adopted.

On the other hand, the free sample No. When the coating amount is 4.0 g / 0.18 m ² as shown in No. 4, there is a peeling strength of 2.07 N / 25 mm. If the amount is increased more than this, the peeling strength becomes too strong and the adherend (15) is damaged at the time of peeling. Therefore, the coating amount of 2.0 to 4.0 g / 0.18 m ² is an appropriate numerical range in the production of the low-adhesion decorative board (A).

  Moreover, the brand name "Nicazole B-8815" of the said adhesive (13) has a viscosity: 1500-3000 mPa * s (25 degreeC), Content of the resin solid content (copolymer) among the components: Since the moisture content occupies 62 to 64% as compared to 36 to 38%, the amount of moisture increases as the coating amount increases, and if the drying is not performed sufficiently, the surface (adhesive surface) becomes a separator (14 ) Will stick and cause another problem that it cannot be peeled off.

In this respect, the sample No. At a coating amount of 4.0 g / 0.18 m ² such as 4, a necessary and sufficient peeling strength (adhesive strength) is obtained, so there is no need to increase the amount further.

  Furthermore, in order to perform an environmental test, the surface (adhesive surface) of the low-adhesive decorative board (A) coated with the above-mentioned trade name “Nicazole B-8815”, which is also an acrylic copolymer aqueous emulsion adhesive (13). In addition, a total of 8 types of adherends (15) are pasted and left standing for 24 hours under five different temperature environments, and then the pasted state of the adherends (15) is maintained. I checked. Thereafter, the adherend (15) was peeled off, and tearing or glue transfer of the adherend (15), ink transfer to the adhesive surface, paper remaining, and other conditions were also confirmed. The results are shown in Tables 4a to 4e.

  According to the results of Tables 4a to 4e, the pasted state of the adherend (15) was maintained even after 24 hours in all temperature environments, and natural peeling did not occur, but the adherend (15 ) Type (paper quality), the relationship between the temperature and the coating amount, and other conditions, there were also cases where problems could occur in the state of peeling.

  There are no problems with copy paper, calendar, laminate film, and photographic paper under any temperature environment. Tables 4a to 4e can be used as application selection data for items that may cause problems. .

(10) Wood substrate (11) Adhesive (12) Cosmetic sheet (13) Adhesive (14) Separator (15) Adhesive (post)
(16) Roll coater (17) Drying furnace (18) Laminator (19) Letter (20) Frame (21) Stand (22) Open / close window (23) Sash frame (24) Corner installation Metal fittings (25), basement wall (26), hidden nails (27), lockers (A), low-adhesion decorative boards (B), bulletin boards (C), welcome boards (M), interior wall materials (W), wall surfaces ( a) ・ Semi-finished low-adhesive veneer

Claims (6)

Affixing a decorative sheet printed with various patterns to the entire surface of the wood substrate via an adhesive,
A low-adhesive decorative board characterized in that a re-peelable acrylic copolymer aqueous emulsion pressure-sensitive adhesive is applied to the entire surface of the decorative sheet, and the coating film is covered with a transparent separator. Low adhesive decorative board according to claim 1, wherein the setting the coating weight of the acrylic copolymer aqueous emulsion adhesive to ^{2.0g / 0.18m 2 ~4.0g / 0.18m 2} .   Using the low-adhesive decorative board according to claim 1 as a bulletin board, a posting material is pasted from the front side to a coating film of an adhesive exposed by peeling of the separator, and then the posting material is coated by pasting the separator. How to use the bulletin board characterized by Attaching a decorative sheet printed with various patterns to the entire surface of the wood substrate via an adhesive, and applying a re-peelable acrylic copolymer aqueous emulsion adhesive to the entire surface of the decorative sheet A low-adhesive decorative board consisting of
A bulletin board characterized by a picture frame that surrounds the mouth end. Attaching a decorative sheet printed with various patterns to the entire surface of the wood substrate via an adhesive, and applying a re-peelable acrylic copolymer aqueous emulsion adhesive to the entire surface of the decorative sheet A low-adhesive decorative board consisting of
A bulletin board having a sash frame of a transparent opening / closing window covering the adhesive coating film from the front side. Attaching a decorative sheet printed with various patterns to the entire surface of the wood substrate via an adhesive, and applying a re-peelable acrylic copolymer aqueous emulsion adhesive to the entire surface of the decorative sheet A low-adhesive decorative board,
A bulletin board characterized in that, as an interior wall material for at least one tatami mat to be embedded in a wall surface of a building, one or a plurality of parallel walls are attached to and integrated with a basement wall of the building.

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