JPS6232875Y2 - - Google Patents

Description

[Detailed description of the invention] Conventional desk tops include melamine hard resin plates, polycarbonate, polyvinyl chloride (PVC), and plastic sheets whose surfaces are coated with ultraviolet curable resin.

Desktops need to have a hardness suitable for writing, but melamine hard resin boards and polycarbonate are too hard, and if you continue writing on them, especially with a ballpoint pen, your wrists will get tired, which is unpleasant.

Furthermore, in the case of PVC, if a cigarette were spilled from the ashtray, it would easily get burnt, and it would also get dirty easily, creating aesthetic problems. Furthermore, even when coated with an ultraviolet curable resin, the durability against cigarette burns was insufficient.

The present invention solves the above-mentioned problems and is a desk top with excellent cigarette flame resistance and stain resistance that allows continuous writing work, especially with a ballpoint pen, without getting tired. Its gist is a desktop featuring a laminated structure of a highly conductive layer, a soft heat-resistant resin layer, and an antifouling layer.

Figures 1 and 2 show the desktop of the present invention.
1 is a layer with high thermal conductivity, 2 is a soft heat-resistant resin layer, 3
4 is an antifouling layer, and 4 is a synthetic resin base material.

5 in FIG. 2 is a printing layer, which has a normal printing thickness.

Layer 1 with high thermal conductivity is made of aluminum, copper, iron,
Examples include thin metal plates of zinc or lead, metal foil sheets, metal foil ribbons, plating or metal vapor deposited films, and metal powder layers.

A major feature of the present invention is that the highly thermally conductive layer 1 is used as a component of the desktop, and that this layer improves the efficiency of heat dispersion and prevents significant local temperature rises. Commercially available metal foils and films with sufficient thickness can be used.

The soft heat-resistant resin layer 2 can be made of PVC crosslinked resin, polyurethane, or acrylic resin. The soft heat-resistant resin layer 2 usually refers to a resin layer that does not soften or break even if it comes into contact with a high-temperature heat source.

PVC crosslinking methods include known methods such as adding unsaturated carboxylic acid and its ester monomer together with a radical generator into PVC and heating, dithiol-S-triazine, trithiocyanuric acid, dimercaptothiadiazole, and derivatives thereof. This can be easily done by adding .

Furthermore, since these resins have a high softening point, they are not easily deformed. The soft heat-resistant resin layer has appropriate elasticity so that writing work does not cause fatigue. The soft heat-resistant resin layer may be transparent, colored like a marble pattern, or a translucent sheet. Further, a printed layer 5 may be provided as shown in FIG.

The appropriate thickness of the soft heat-resistant resin layer 2 is 0.1 to 1 m/m.

In the case of conventional desk tops, nicotine from cigarettes penetrates through the surface layer, leaving stains on the surface that cannot be easily removed.In contrast, in this invention, an antifouling layer 3 is formed, so nicotine penetrates through the surface of the desk top. It does not cause any contamination and always maintains a beautiful surface condition. The antifouling layer can also be printed on the back side in advance and laminated to form the printed layer 5 in FIG. 2. The antifouling layer is made of polytetrafluoroethylene, isotactic polypropylene,
High melting point, highly crystalline, linear polymers such as polyethylene terephthalate, polyamide, polyacetal, etc. are desirable.

Even more surprisingly, in the present invention, the antifouling layer is not damaged even if a cigarette is left unattended because heat does not accumulate due to the highly thermally conductive layer 1.

In the present invention, it is preferable that the antifouling layer, the soft heat-resistant resin layer, and the highly thermally conductive layer be bonded to each other using a polyester having a hydroxyl group and an isocyanate-reactive adhesive.

The resulting laminate is lined with a flexible synthetic resin substrate 4. The flexible synthetic resin base material 4 is
Made of synthetic resin such as PVC, polyethylene, porpropylene, etc., 100 parts of filler is used for 100 parts of resin.
It is a flexible sheet with a relatively large amount of filler in 200 parts.

In the present invention, it is desirable to increase the specific heat of the base material in order to improve the cigarette resistance. For this reason, slaked lime or beryllium oxide may be used as appropriate in addition to ordinary fillers such as calcium carbonate.

A woven or nonwoven fabric may be attached to the surface of the base material.

The base material 4 provides appropriate elasticity and weighting during writing operations.

Furthermore, the specific heat of the base material can be increased by adding a filler having a high specific heat to further enhance the cigarette resistance effect.

As an effect of this invention, it has a suitable hardness that allows writing work, especially writing work with a ballpoint pen, to be performed efficiently and without fatigue, and a layer with high thermal conductivity, a soft heat-resistant resin layer, and an antifouling layer are formed. This prevents heat from gathering locally, which prevents the soft heat-resistant resin layer from being heated above a temperature that would cause it to deform or discolor, and the antifouling layer prevents nicotine from penetrating into the desktop surface when a cigarette is left unattended.

In addition, the antifouling layer prevents normal dirt and maintains its beautiful appearance. Furthermore, as an unexpected feature, it has a hardness suitable for obtaining clear stamps.

In this way, the present invention provides a desktop that combines an extremely wide variety of performance features.

The desk top of the present invention may be simply placed on a ready-made desk, or may be glued to the top plate during desk manufacture. At this time, unlike conventional melamine decorative boards, the desk top of this invention can be bent freely.
This is extremely useful as it allows the surface of a desk or counter to be easily finished to match the designer's wishes.

[Brief explanation of the drawing]

Figures 1 and 2 show the desktop of the present invention. 1 is a layer with high thermal conductivity, 2 is a soft heat-resistant resin layer,
3 is an antifouling layer, 4 is a flexible synthetic resin base material, and 5 is a pattern layer.

Claims (1)

[Scope of utility model registration request] A desktop characterized by laminating a highly thermally conductive layer, a soft heat-resistant resin layer, and an antifouling layer on a flexible synthetic resin base material.