JPH10290727A - Desk mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a desk mat with an excellent using feeling provided with excellent durability for not being practically degraded even at the time of being used for a long period of time usable also as a mouse pad without the transfer of toner or the like even when a copy document or the like is kept in contact for the long period of time. SOLUTION: This desk mat 1 is at least provided with a surface projected and recessed layer 2 and a base sheet layer 4, the surface projected and recessed layer 2 is composed of synthetic resin 5 containing beads 6 whose average grain diameter is 10-60 μm and the base sheet layer 4 is thermoplastic resin or elastomer not practically containing a plasticizer. A synthetic resin sheet layer 3 can be provided between the surface projected and recessed layer 2 and the base sheet layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desk mat which has a good usability and can be used as a mouse pad. In addition, the present invention relates to a desk mat that does not transfer toner or the like even when a copy document or the like is kept in contact for a long time.

[0002]

2. Description of the Related Art In the case of a desk or learning desk made of melamine-treated or urethane-treated wood or steel made of wood or steel, the desk mat is improved in use feeling or has a scratch on the desk. Desk mats are often used to prevent problems. In addition, when working for a long time at a general office desk or personal computer desk, it is preferable to give the desk surface flexibility and reduce the thermal conductivity so as to eliminate the uncomfortable feeling at the time of hand contact.

[0003] Conventionally, desk mats used for such purposes are made of soft polyvinyl chloride containing a large amount of a plasticizer. However, if copy paper is sandwiched under a plasticizer-containing soft polyvinyl chloride desk mat for a long period of time, there is a problem that the toner on the paper is transferred to the soft polyvinyl chloride sheet. Attempts have been made to apply heat treatment, embossing, etc. to the back surface of the flexible polyvinyl chloride sheet to prevent toner from adhering, but there is a drawback in that the price of the desk mat increases as the number of processing steps increases . If hand sweat or the like adheres to the surface of the polyvinyl chloride sheet, a sticky feeling is generated on the surface, which may give a user discomfort.

Recently, harmful gases such as dioxin generated from refuse incinerators have become a problem, and one of the causes is polyvinyl chloride. Therefore, if a desk mat is made of a resin not based on polyvinyl chloride, generation of harmful gases such as dioxin can be suppressed when the desk mat is incinerated as garbage in the future. This is very effective in environmental protection.

In view of the above-mentioned disadvantages of the soft polyvinyl chloride desk mat, desk mats made of polyolefin elastomers have recently been marketed. There is no problem that copy toner is transferred to a desk mat made of a polyolefin elastomer. However, since the surface of the desk mat made of the polyolefin-based elastomer is flat, the mouse of the personal computer cannot be operated on the flat surface.

Recently, work is often performed with a personal computer set on a desk, and a mouse pad is a necessity for that purpose. However, since commercially available mouse pads are small, when the documents are spread on a desk, the mouse pad is hidden, and it is often inconvenient to operate the mouse. A very large mouse pad is convenient because you can operate the mouse anywhere on the desk, but the flexibility of the lower layer of a commercially available mouse pad is unsuitable as a desk mat. Work area is too small. In addition, using a large mouse pad in addition to the desk mat has the problem of being too expensive.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a good feeling of use, which can be used as a mouse pad, and has a good durability that does not substantially deteriorate even when used for a long period of time. It is an object of the present invention to provide a desk mat which does not transfer toner and the like even when it is left as it is.

[0008]

Means for Solving the Problems In view of the above problems, as a result of intensive research, the present inventor has found that a base sheet made of a material to which copy toner is not transferred has a surface uneven layer made of a synthetic resin layer in which minute beads are embedded. By forming the desk mat, the front surface has a friction resistance and durability required as a mouse pad, and the back surface has a property that copy toner does not transfer, and a desk mat having sufficient strength and flexibility as a whole can be obtained. The present invention has been found, and the present invention has been made.

That is, the desk mat of the present invention has at least a surface uneven layer and a base sheet layer.
The surface uneven layer is made of a synthetic resin containing beads having an average particle diameter of 10 to 60 μm, and the base sheet layer is a thermoplastic resin or an elastomer containing substantially no plasticizer.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The desk mat of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited to these.

[1] Configuration of Desk Mat FIG. 1 shows an example of a desk mat 1 of the present invention. The desk mat 1 of the present embodiment includes a surface uneven layer 2, a synthetic resin sheet layer 3, and a base sheet layer 4.

[A] Surface Roughness Layer The surface roughness layer 2 constituting the uppermost layer of the desk mat 1 is composed of a synthetic resin layer 5 in which fine beads 6 having an average particle diameter of 10 to 60 μm are uniformly dispersed. If the average particle diameter of the beads 6 is less than 10 μm, the resistance of the mouse ball during sliding is too small, and if the average particle diameter of the beads 6 is more than 60 μm, the surface irregularities are too large and the feel when operating the mouse is poor. In addition, the appearance and feel of the surface of the desk mat 1 deteriorate. The amount of the beads 6 varies depending on the size of the beads 6, the thickness of the surface uneven layer 2, the desired surface frictional resistance, and the like, but generally may be about 20 to 80% by volume.

As a material of the beads 6, fine particles such as acrylic resin and glass are preferable. When the desk mat 1 is made transparent so that the feeling of the material of the desk is not lost, the material of the beads 6 also needs to be substantially transparent.

The resin constituting the matrix phase of the surface uneven layer 2 is not particularly limited as long as it can disperse the fine beads 6. Examples of preferred resins include polyester resins such as polyethylene terephthalate and polybutylene terephthalate; acrylic resins such as polymethyl methacrylate; polyvinyl chloride resins; polyolefin resins such as polyethylene, polypropylene and ethylene-α-olefin copolymers; ABS resin;
Polyamide resin; epoxy resin and the like. In order to impart sufficient durability, stain resistance, abrasion resistance, scratch resistance, and the like, it is preferable to use a thermosetting resin as the matrix resin or to perform a surface cross-linking treatment. If necessary, additives such as an antibacterial agent, an antioxidant, and a coloring agent may be added.

The surface uneven layer 2 is preferably formed by applying fine beads 6 dispersed in an organic solvent solution of the above resin on the synthetic resin sheet layer 3 and drying. Alternatively, a method of extruding and laminating a melt-kneaded product of the resin and beads 6 may be used. In order to improve the wear resistance of the surface uneven layer 2, a hardening treatment may be performed. The curing treatment can be performed by any method such as heat curing and ultraviolet curing.

The surface unevenness layer 2 only needs to be thick enough to allow the fine beads 6 to protrude from the surface.
m. However, if the compounding ratio of the beads 6 is increased, the beads 6 can protrude from the surface even if the mixing ratio is larger than this, so that the thickness of the surface uneven layer 2 is not limited to the above range.

By providing the surface uneven layer 2 on the desk mat 1, an appropriate surface frictional resistance can be obtained, so that it is most suitable as a mouse pad. In addition, there is no sticky feeling even if hand sweat adheres, and the surface becomes smooth and refreshing. Further, there is also an advantage that there is no glare (gloss) due to fine surface irregularities and it is easy on eyes.

[B] The synthetic resin sheet layer The surface uneven layer 2 may be formed directly on the base sheet layer 4, but from the viewpoint of manufacturing, the surface uneven layer 2 is formed on the synthetic resin sheet once. Is preferably laminated on the base sheet. In such a case, the desk mat 1 has the synthetic resin sheet layer 3.

Writing and stamping and sliding the mouse on the desk mat 1 require the desk mat 1 to have an appropriate hardness as a whole. It can also be obtained by the synthetic resin sheet layer 3. As a synthetic resin having such properties, polyolefins such as polypropylene and polyethylene, polyesters such as polyethylene terephthalate, polyamides such as nylon and the like are preferable, and polyesters such as polyethylene terephthalate are particularly preferable. The thickness of the synthetic resin sheet layer 3 may be about 20 to 100 μm,
0 μm is more preferred. When the entire desk mat 1 is made transparent, the synthetic resin sheet layer 3 also needs to be substantially transparent.

[C] Base Sheet Layer In order to prevent transfer of toner and the like even when a copy document or the like is kept in contact for a long period of time, the base sheet layer 4 contains substantially no plasticizer and is flexible. It is formed of a thermoplastic resin or elastomer having properties. Since the plasticizer not only bleeds out in a long period of time but also reacts with the toner resin to transfer the toner to the base sheet layer 4,
Must not be present in base sheet layer 4.

The base sheet layer 4 having such properties
As the material of the ethylene-propylene copolymer rubber,
Ethylene-propylene-diene copolymer rubber, ethylene-butene copolymer rubber, ethylene-octene copolymer,
An olefinic elastomer such as polyisobutylene or a thermoplastic elastomer composition obtained by blending a polyolefin such as polypropylene or polyethylene with them is preferable, but other resins can be used as long as they have appropriate flexibility. If necessary, additives such as an antibacterial agent, an antioxidant, and a coloring agent may be added. When the entire desk mat 1 is transparent, the base sheet layer 4 also needs to be substantially transparent.

The softness of the desk mat 1 is appropriate, the weight is close to the desk, the mechanical strength, the transparency, the touch, the writing property,
The thickness of the base sheet layer 4 may be about 1 to 5 mm in order to impart the printing property. If it is less than 1 mm, the above properties are insufficient, and the end of the desk mat 1 is curved, so that the usability is deteriorated. Further, even if the thickness of the base sheet layer 4 exceeds 5 mm, there is almost no further improvement in the above properties. Practically, about 1 to 3 mm is sufficient.

[D] Other Layers If the user wants to enjoy the feeling of desk material or place desired printed matter, paintings, photographs, etc. under the desk mat 1, the desk mat 1 needs to be substantially transparent. Therefore, it is composed only of the above layers. However, it is also possible to print in advance as desired. In this case, a printing layer may be provided on the front surface or the back surface of the synthetic resin sheet layer 3.

[2] Method of Manufacturing Desk Mat The surface uneven layer 2 may be formed directly on the base sheet layer 4 made of a polyolefin-based elastomer. It is preferable to form the uneven surface layer 2 on a sheet 3 'made of synthetic resin having good adhesion, and then to laminate the synthetic resin sheet 3' on the base sheet 4 '. This method will be described in detail with reference to FIG.

The formation of the surface unevenness layer 2 is performed by applying a dispersion of fine beads 6 in an organic solvent solution of a synthetic resin 5 on a synthetic resin sheet 3 ′ by a known method and drying. it can. Alternatively, a method of extruding and laminating a melt-kneaded product of the synthetic resin 5 and the beads 6 may be used. In order to improve the surface hardness, abrasion resistance and durability of the surface uneven layer 2, a cross-linking hardening treatment may be performed. Crosslinking treatment is
It can be performed by heating or irradiation with ultraviolet rays.

It is preferable that the resin film for the base sheet layer 4 is melt-extruded on the synthetic resin sheet 3 'on which the surface uneven layer 2 is formed, and the base sheet 4' is laminated (extrusion lamination) in a molten state. Alternatively, the layers may be laminated by an adhesive method using an adhesive. A desk mat 1 can be obtained by cutting the obtained laminated sheet according to the size of the desk after the production.

[0027]

As described in detail above, since the desk mat of the present invention has a surface uneven layer having a synthetic resin layer in which fine beads are dispersed, it has an appropriate surface frictional resistance and good rotation of a mouse ball. And a good mouse operation feeling can be obtained. In addition, because of the surface unevenness layer, there is no sticky feeling even when sweat from the hands adheres, and the skin is refreshing and refreshing. Further, there is also an advantage that there is no glare (gloss) due to fine surface irregularities and it is easy on eyes.

Further, since the base sheet layer is made of a flexible thermoplastic resin or elastomer substantially containing no plasticizer, flexibility suitable for a desk mat, weight enough to adhere to a desk, mechanical strength, and feel , Writing and printing properties. Further, since the base sheet layer does not substantially contain a plasticizer, the copy toner is not transferred even when a copy document is placed under the desk mat. Also, because it does not contain polyvinyl chloride, it is possible to effectively suppress the generation of harmful gases such as chlorine gas and dioxin during incineration,
It also has the advantage of being environmentally friendly.

The desk mat of the present invention having the above-mentioned properties can be made large enough to cover almost the entire surface of the desk, so that even if there are many documents on the desk, it is not inconvenient to operate the mouse. Also, when operating a personal computer in which the mouse moves a long distance, such as graphics, the mouse can be continuously moved on the desk mat, so that the operation becomes comfortable. The desk mat of the present invention having such features eliminates dissatisfaction with conventional desk mats and mouse pads and meets the needs of personal computer users, and new demand can be expected.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of a desk mat of the present invention.

FIG. 2 is a schematic sectional view illustrating an example of a method for manufacturing a desk mat according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Desk mat 2 ... Surface unevenness layer 3 ... Synthetic resin sheet layer 4 ... Base sheet layer 5 ... Synthetic resin in surface unevenness layer 6 ... Beads

Claims (3)

[Claims] 1. A desk mat having at least a surface uneven layer and a base sheet layer, wherein the surface uneven layer is made of a synthetic resin containing beads having an average particle size of 10 to 60 μm, and the base sheet layer is substantially A desk mat characterized by being a thermoplastic resin or elastomer containing no plasticizer. 2. The desk mat according to claim 1, further comprising a synthetic resin sheet layer between the surface uneven layer and the base sheet layer. 3. The desk mat according to claim 1, wherein the beads are fine particles of an acrylic resin.