JP2011122394A - Floor material packing body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor material packing body preventing scratches on the surface of a coating film during transportation in a spread type wooden floor material and making the generated scratches inconspicuous to reduce a packing cost and to reduce an environmental load. <P>SOLUTION: The floor material packing body A packs a plurality of wooden floor materials 1 formed with cured coating films 21 so that the coating film surface is directly laid on top of the other coating film surface. The cured coating film 21 is formed by applying an ultraviolet curable coating material to a wooden base material 11 to perform ultraviolet curing. A pencil hardness of the coating film surface is H-HB, and a coefficient of static friction is 0.25-0.3. The thickness of the cured coating film 21 is 70-80 &mu;m. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a flooring package comprising a plurality of wooden flooring materials which are provided with a cured coating film and which are excellent in stain resistance and scratch resistance.

  Conventionally, a wood-based flooring as disclosed in Japanese Patent Application Laid-Open No. 2008-261093 (Patent Document 1) is known. As shown in FIG. 3, this wood-based flooring is prepared by applying undercoating and intermediate coating to a wooden base material 11 which is a wood board such as ordinary plywood, reinforced plywood, MDF (medium density fiber board) and particle board. To form an undercoat film and an intermediate coat film, respectively. Thereafter, the ultraviolet curable coating material overcoated by the roll coater 3 is cured by irradiating with ultraviolet rays in the ultraviolet irradiating apparatus 101 to form a cured coating film on the surface of the wooden flooring 1.

  In this way, board materials such as plywood, MDF, and particle board such as wood boards, or wood-based flooring with a cured coating film formed on the surface of a wood substrate with a veneer attached to the surface can be used as a flooring for a house. It is. For example, wooden floor materials that can be used in living rooms, corridors, bathrooms, and toilets are known. Such a wood-based flooring is a high-strength type having water resistance and ammonia resistance for use in a bathroom dressing room and toilet flooring. In order to achieve such high strength, for example, the wood base material is hardened by applying an olefin decorative sheet with polyurethane adhesive to the surface of an extruded plate made of wood powder, polypropylene resin and inorganic filler, and cured. The coating film has a thickness of 100 to 120 μm and a fluorine finish. The strength of the wood-based flooring is enhanced by the elements of the wood base material and the cured coating material and all the structures.

  A flow coater is used for thick coating on such a high-strength type wooden flooring. The flow coater drops the paint from a narrow slit that is higher than the wooden floor material to be painted into an unbroken curtain, and moves the object to be coated at a constant speed underneath it. Is applied to the object to be coated evenly. In order to prevent the coating unevenness from occurring, it is necessary to drop a certain amount or more of the paint so that the curtain-like paint does not break. For this reason, the flow coater is suitable for the production of a wooden floor material to which a thick coating is applied.

  High-strength wood flooring can make the flooring of the entire house have a sense of unity and luxury. The strength up to is not required. Therefore, for the purpose of providing inexpensive flooring materials that can be used in living rooms and corridors, it is not enough to withstand use in a bathroom and restroom, but has stain resistance and scratch resistance. By adjusting the raw material and structure of the cured coating film to suppress the strength compared to the high-strength type wooden flooring, a popular type wooden flooring with reduced cost is also used.

  The wood-based flooring material used in a house is transported by being stacked and packaged so that the surface of the coating film and the surface of the coating film are directly aligned after the production. During transportation, the coating surfaces are rubbed together by shaking. At this time, in the case of a high-strength type woody floor material, scratches are hardly generated on the surface of the coating film by rubbing.

JP 2008-261093 A

  However, the widespread type wood flooring has a problem that the surface of the coating film is scratched by rubbing during transportation because the strength is suppressed. For this reason, in order to prevent scratches during transportation, popular wood flooring materials must be packed with paper sandwiched between the paint film surface and the paint film surface. Cost, and there is a problem of increasing the environmental load because paper is required.

  The invention of the present application was invented in view of the above-mentioned background art, and its problem was to prevent the scratches on the surface of the coating film during transportation in the popular type wood-based flooring, and the generated scratches were inconspicuous, and the packaging cost Is to provide a flooring package that reduces environmental burden.

  In order to solve the above-mentioned problems, in the invention according to claim 1 of the present application, the pencil hardness of the coating film surface is H to HB and the static friction is obtained by applying an ultraviolet curable paint to a wooden base material and curing it with ultraviolet rays. A wood-based flooring material on which a cured coating film having a coefficient of 0.25 to 0.3 is formed is a flooring packaging body in which a plurality of sheets are packed so that the coating film surface and the coating film surface are directly superimposed. .

  The invention according to claim 2 is characterized in that, in the flooring material package according to claim 1, the thickness of the cured coating film is 70 to 80 μm.

  In the woody flooring of claim 1 of the present invention, the pencil hardness of the cured coating film surface is H to HB, so even if scratches are made, it becomes difficult to whiten and the scratches are not noticeable, and the scratches are not noticeable by wiping. It became possible to do.

  A surface having a static friction coefficient of 0.25 to 0.3 has smoothness while having gripping properties. The grip property prevents rubbing due to shaking during transportation, and at the same time, even when rubbing occurs, the surface of the coating film is smooth so that it does not get caught and prevents scratches.

  That is, the wooden flooring material provided with a cured coating film having a surface pencil hardness of H to HB and a static friction coefficient of 0.25 to 0.3 has grip and smoothness on the surface. Reduces rubbing during transportation to prevent scratches, and even when rubbing occurs, there are few surface catches to prevent scratches. Further, even if a scratch is generated, it is difficult to whiten, and it is possible to make the scratch inconspicuous by wiping. From this, the packaging which does not sandwich paper between the coating film surface and the coating film surface became possible. Such a packing material for flooring has the advantages of reducing packing costs and reducing environmental load.

  In widespread wood flooring, without changing the base material, undercoating, or intermediate coating, it is possible to prevent scratches during transportation simply by changing the cured coating that is the top coating. It is unnecessary.

  In addition, in the woody flooring of the invention according to claim 2 of the present application, since the thickness of the cured coating film is set to 70 to 80 μm, it has stain resistance enough to be used in a living room or a hallway of a house. Wood flooring can be provided at low cost while reducing the amount of paint used. Moreover, it becomes possible to paint using a roll coater widely used for painting a wooden flooring material, and the production of the wooden flooring material used in the present invention is easy.

The schematic diagram which shows a mode that the wood type flooring used for embodiment of this invention is painted from a side surface. The side view which shows the flooring packing body which is embodiment of this invention. The schematic diagram which shows a mode that the wooden type flooring which is a prior art example is manufactured from a side surface.

  1 and 2 show an embodiment corresponding to claims 1 and 2 of the present application. FIG. 1 shows a state when the wooden flooring 1 used in this embodiment is painted, and FIG. 2 shows a state where the wooden flooring 1 of this embodiment is packed into a flooring package A. This flooring package A is obtained by applying the ultraviolet curable paint 2 to the wooden base material 11 and curing it with ultraviolet rays, whereby the pencil hardness of the coating film surface is H to HB and the static friction coefficient is 0.25 to 0. The wooden flooring 1 on which the cured coating film 21 of .3 is formed is packed so that the coating film surface and the coating film surface are directly superimposed. Moreover, the thickness of the cured coating film 21 is 70-80 micrometers.

  Hereinafter, the flooring package of this embodiment will be described in more detail. As shown in FIG. 1 and FIG. 2, the wooden flooring 1 used in this embodiment is coated on the surface of a wooden substrate 11 formed by sticking a veneer made of a tree species such as oak or beach on the surface of plywood. Obtained. The coating is performed by undercoating the surface of the wooden substrate 11 to form an undercoating film, and then applying an intermediate coating film to form an intermediate coating film. 2 is applied. A cured coating film 21 is formed by irradiating the overcoated ultraviolet curable coating 2 with ultraviolet rays (not shown).

  The composition of the ultraviolet curable coating 2 contains at least a resin binder that is a main component of the cured coating film 21 and a photoinitiator that initiates crosslinking for coating film curing by ultraviolet irradiation. Furthermore, additives such as extender pigments and matting agents for adjusting the viscosity of the paint and the physical properties of the coating film may be contained to form a composition. These compositions can be used by dissolving in an organic solvent such as alcohol or toluene. However, in consideration of workability and safety, the composition is not dissolved in an organic solvent, and is a solventless type. It may be used as a paint. In this embodiment, the ultraviolet curable paint 2 is a solventless paint.

  The surface of the wooden flooring 1 has a pencil hardness of H to HB and a static friction coefficient of 0.25 to 0.3. The coefficient of static friction of the surface of the wooden flooring 1 used for a house is set to a value that does not fall even if a person walks on the surface. If the coefficient of static friction is too low, it may become slippery and may fall. Conversely, if the coefficient of static friction is too high, it will be easy to trip and may fall. Furthermore, in the wooden flooring 1 used in this embodiment, it is necessary to provide the surface with smoothness and grip to prevent scratches during transportation. As a result of considering these conditions, the coefficient of static friction is most preferably 0.25 to 0.3.

  The pencil hardness is a value indicating the resistance of the coating film as defined in JIS-K5600-5-4 of the JIS standard. Among these, the pencil hardness H to HB indicates that the pencil hardness is any one of H, F, and HB.

  The surface of the wooden floor material 1 is the surface of the cured coating film 21. In order that the pencil hardness of the surface of the wood-based flooring 1 is H to HB and the coefficient of static friction is 0.25 to 0.3, the composition of the ultraviolet curable paint 2 is adjusted to obtain a cured coating. The physical properties of the film 21 are adjusted. The composition adjustment of the ultraviolet curable paint 2 is performed as follows.

  The amount and type of resin binder and photoinitiator contained in the ultraviolet curable paint 2 are adjusted. The cured coating film 21 is formed by irradiating a photoinitiator with ultraviolet rays to generate radical species, and a resin binder having a polymerization ability is cross-linked into a three-dimensional structure. It is possible to change the physical properties of the cured coating film 21 by changing the type of the resin binder. Various resins such as acrylic urethane, polyester acrylate, polyether acrylate, and epoxy acrylate can be used as the resin binder, but acrylic urethane resins are used in consideration of the hardness and toughness required for flooring. Is preferred.

  In addition, it is possible to adjust by changing the photoinitiator to change the property of crosslinking, or by changing the crosslinking density. In this embodiment, the crosslink density of the cured coating film 21 is reduced by mixing a dilution monomer with the ultraviolet curable coating material 2, and the flexibility of the surface of the cured coating film 21 is increased.

  When the flexibility of the cured coating film 21 is increased, the cured coating film 21 may be lost due to rubbing. In order to prevent this, an extender pigment may be added to the ultraviolet curable paint 2 to reinforce the physical strength of the cured coating film 21. Examples of extender pigments include calcium carbonate, magnesium carbonate, magnesium sulfate produced by synthesis, clay, diatomaceous earth, and talc, which are natural rocks and clays. Further, the pencil hardness and the coefficient of static friction may be adjusted by utilizing the fact that when the extender pigment is added, the viscosity of the ultraviolet curable paint 2 is increased and the grip property of the surface of the cured coating film 21 is increased. In this case, extender pigments, such as light calcium carbonate, whose particle size and shape can be selected and whose physical properties of the cured coating film 21 can be easily adjusted may be added.

  The cured coating film 21 formed on the surface of the wooden floor material 1 has a glossy finish. In the finishing of the wooden flooring 1, there is a case where a matting process for removing the gloss of the cured coating film 21 is required to give a wooden material feeling or a high-class feeling. The matting process is performed by adding a matting agent to the ultraviolet curable paint 2 or blasting the surface of the cured coating film 21. In this embodiment, the matting agent is added to the ultraviolet curable paint 2. Added.

  The material of the matting agent is not limited as long as it is a substance that scatters incident light on the cured coating film 21 and produces a matting effect. Examples thereof include inorganic matting agents such as silica (silicon dioxide) powder and mica powder, and organic matting agents such as acrylic resin beads. In this embodiment, silica powder is used.

  The particle size of the matting agent is determined in consideration of the following matters. That is, the matting agent has a matting effect by forming irregularities on the surface of the cured coating film 21. For this reason, in order to give smoothness to the surface of the cured coating film 21, it is desirable that the particle size of the matting agent is smaller because the unevenness of the surface of the cured coating film 21 is reduced, but it is difficult to obtain a matting effect. . In this case, in order to obtain a matting effect, increase the amount of matting agent, change the type of matting agent, or increase the particle size. If the weight ratio of additives such as UV curable paint 2 exceeds 50%, the viscosity of the UV curable paint 2 becomes too high, and the workability of the coating deteriorates. When the particle size of the matting agent is increased, the unevenness of the surface of the cured coating film 21 is increased and the matting effect can be easily obtained, the grip property is enhanced, and the static friction coefficient is increased.

  In FIG. 2, the flooring package A of this embodiment is shown. The wooden flooring 1 having a cured coating film 21 formed on the surface of the wooden substrate 11 is stacked and packed. The direction of the cured coating film 21 is reversed every other wood-based flooring 1, and the coating film surface and the coating film surface are directly superimposed. The floor material packing body A is packed with a packing material 4 such as a wooden frame as necessary.

  Therefore, the wooden flooring 1 used in the flooring package A according to this embodiment has a pencil hardness of H to HB on the surface of the cured coating film 21, so that it is difficult to be whitened even when scratched, and the scratch is conspicuous. Moreover, it became possible to make the scratches inconspicuous by wiping.

  The surface of the cured coating film 21 having a static friction coefficient of 0.25 to 0.3 has smoothness while having grip properties. The grip property prevents rubbing due to shaking during transportation, and at the same time, even when rubbing occurs, the surface of the coating film is smooth so that it does not get caught and prevents scratches.

  That is, the wooden flooring 1 provided with the cured coating film 21 having a pencil hardness of H to HB and a static friction coefficient of 0.25 to 0.3 has grip and smoothness on the surface. Therefore, the friction during transportation is reduced to prevent scratches, and even if rubbing occurs, the surface is hardly caught and the scratches are prevented. Further, even if a scratch is generated, it is difficult to whiten, and it is possible to make the scratch inconspicuous by wiping. From this, the packaging which does not sandwich paper between the coating film surface and the coating film surface became possible. The flooring package A with such packaging has the advantages of reducing packaging costs and reducing the environmental burden.

  In widespread wood-based flooring 1, scratches during transportation can be prevented simply by changing the cured coating 21, which is a top coat, without changing the base material, undercoating, and intermediate coating. No change is required.

  Since the thickness of the cured coating film 21 is set to 70 to 80 μm, the wooden flooring 1 having a stain resistance that can be used in a living room or a corridor of a house is provided at a low cost while suppressing the amount of paint used. Is possible. In addition, the roll coater 3 widely used for painting the wooden flooring 1 can be used for painting, and the production of the wooden flooring 1 used in the present invention is easy.

  In this embodiment, since the ultraviolet curable paint 2 is a solventless paint, the viscosity is higher than that of a paint using an organic solvent. In the case of a highly viscous paint, the added matting agent is difficult to float on the surface. For this reason, a matting agent is arrange | positioned inside the cured coating film 21, and there exists a problem that the incident light to the cured coating film 21 is scattered in the cured coating film 21, and the wooden flooring 1 becomes whitish. However, in this embodiment, the blending of the diluting monomer to lower the crosslink density of the cured coating film 21 lowers the viscosity of the ultraviolet curable coating material 2 and facilitates the matting agent to be disposed on the surface of the cured coating film 21. . Thereby, while preventing the wooden flooring 1 from becoming whitish, it becomes easy to exhibit the effect of a matting agent and it becomes possible to suppress the addition amount.

  The embodiment of the present invention is not limited to the above. For example, the coating is made of three layers of undercoating, intermediate coating, and top coating, but it may be a coating of only undercoating and top coating, or may be coating of four or more layers.

DESCRIPTION OF SYMBOLS 1 Wood type floor material 11 Wood base material 101 Ultraviolet irradiation apparatus 2 Ultraviolet curable coating material 21 Cured coating film 3 Roll coater 4 Packing material X Traveling direction

Claims (2)

  A cured coating film having a pencil hardness of H to HB and a static friction coefficient of 0.25 to 0.3 was formed by applying an ultraviolet curable coating to a wooden substrate and curing the coating with ultraviolet light. A flooring packaging body in which a plurality of wooden flooring materials are packed so that the coating film surface and the coating film surface are directly superimposed.   The flooring material package according to claim 1, wherein the thickness of the cured coating film is 70 to 80 µm.

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