JP2732178B2 - Pressure-sensitive recording sheet and occlusal pressure diagnostic sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive recording sheet which develops a color when a predetermined pressure is applied thereto, and an occlusal pressure diagnostic sheet using the same.

[0002]

2. Description of the Related Art A pressure-sensitive recording sheet is known in which a color developing agent is applied to a sheet-like support, and a microencapsulated color developing agent is applied thereon (for example, Japanese Patent Publication No. 57-24852).
No. 59-16654, etc.). Here, the coloring agent is formed so as to form a color at a predetermined set pressure (color setting pressure). Therefore, in order to more accurately detect the pressure, a plurality of pressure-sensitive recording sheets having different set pressures have been used in a stack.

[0003] Further, in this pressure-sensitive recording sheet, if water adheres to the color former, the pressure cannot be measured accurately. Therefore, it has been considered to cover this with a waterproof transparent sheet. For example, in Japanese Utility Model Publication No. 45-8166, a waterproof layer is formed on one surface of a transparent paper (support) by polyethylene laminating or coating a vinylidene chloride copolymer emulsion, and microcapsules are formed on the other surface of the transparent paper. Apply,
An envelope is formed with the microcapsule application surface inside, an appropriate number of middle papers, lower papers, etc. coated with a developer are accommodated in the envelope, and the periphery of the envelope is sealed with an adhesive. .

Further, Japanese Patent Application Laid-Open Nos.
No. 24314 discloses that a protective layer is laminated on a recording sheet surface to impart water resistance.

[0005]

2. Description of the Related Art In a method in which a plurality of pressure-sensitive recording sheets having different set pressures are used one upon another for accurate pressure detection, the pressure-sensitive recording sheets are not only relatively easily moved but also increase in thickness. become. Therefore, it is difficult to use, especially when used in a narrow place. In addition, since the sheets move relative to each other, there is another problem that the efficiency is low when examining the pressure distribution in a narrow area while comparing the coloring state of each sheet.

In order to provide waterproofing to one sheet, a method of forming an envelope by forming a waterproof layer on one side of a transparent paper and a microcapsule layer on the other side and sealing the periphery of the envelope is as follows. The microcapsule layer is sandwiched between the two transparent papers around the envelope together with the adhesive. For this reason, the adhesion is incomplete and the reliability of the sealing is deteriorated. Further, there is also a problem that adhesion between the middle paper or lower paper stored inside and the transparent paper is poor, and the paper is peeled off during use.

Further, when a protective layer is laminated on a recording sheet, the recording sheet is heated in the laminating step, so that the recording sheet is degraded by heat and its color developing ability is reduced.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure-sensitive recording sheet capable of detecting pressure with high accuracy without overlapping a plurality of pressure-sensitive recording sheets having different set pressures. This is the first purpose. In addition, the sealing of the recording sheet is perfect, the reliability of water resistance is high, the support holding the color former and the developer does not move with respect to the waterproof layer during use, and there is no risk of deterioration due to heating. A second object is to provide a pressure-sensitive recording sheet. Further, a third object is to provide an occlusal pressure diagnostic sheet using the pressure-sensitive recording sheet.

[0009]

According to the present invention, a first object is to provide an opaque sheet-like synthetic resin support, color developer coating layers formed on both sides of the support, The color setting pressures formed on the respective layers are different from each other.
This is achieved by a pressure-sensitive recording sheet characterized by having two coloring agent coating layers.

Here, the support has a three-layer structure, and the outer support is bonded to an adhesive layer applied to both surfaces of the center support,
Protruding the center support outward from the outer support periphery,
By bonding the periphery of a transparent synthetic resin waterproof layer that directly covers the surface of the coloring agent application layer to the protruding edge, waterproofness is imparted, and the second object can be achieved.

The third object can be achieved by forming the waterproof pressure-sensitive recording sheet substantially in a horseshoe shape substantially along the dental arch.

[0012]

FIG. 1 is a partial sectional view of an embodiment of the present invention. In this figure, reference numeral 10 denotes a support having a three-layer structure. The support 10 has a center support 12 and outer supports 14, 16 bonded to each other. That is, the adhesive layers 18, 2
0 is applied, and the outer supports 14 and 16 are adhered to the adhesive layers 18 and 20, respectively.

The outer periphery of the center support 12 slightly protrudes outward from the outer peripheral edges of the outer supports 14 and 16.
The supports 12, 14, 16 have a predetermined thickness (for example, 16 μm).
m) PET (polyethylene terephthalate), and these supports 12, 14, 16 are colored opaque milky white.

Reference numerals 22 and 24 denote developer coating layers formed on the surfaces of the outer supports 14 and 16, respectively. The developer coating layers 22 and 24 are formed by dispersing a solution of acid clay (montmorillonite) sulfuric acid in water containing caustic soda.
6 and was formed by applying it to the surface and drying it.

Reference numerals 26 and 28 denote color developing agent coating layers formed on the color developing agent coating layers 22 and 24, respectively. The coloring agent coating layers 22, 24 are formed by dissolving a coloring agent such as 1-phenyl-1-xylylethane in oil and microencapsulating the same. Here, the microcapsules are adjusted to various strengths, and the microcapsules to be destroyed change according to the pressure. When the microcapsules are destroyed by the pressure, the color developing agent therein is absorbed by the color developing agent together with the oil to form a color. Each of the coloring agent coating layers 22 and 24 is adjusted so that the set pressure for coloring is different from each other.

Reference numerals 30 and 32 denote waterproof layers, which are formed of the same PET film as the support 10, for example, a 16 μm transparent film.

The waterproof layers 30 and 32 are overlaid on the coloring agent coating layers 26 and 28 and are adhered to the adhesive layers 18 and 20 along the outer periphery of the central support 12. That is, it is bonded to the outer peripheral edge of the central support 12 protruding from the outer peripheral edges of the outer supports 14 and 16. In this case, both waterproof layers 30, 3
It is desirable to sufficiently reduce the pressure and maintain a vacuum between the two.

As described above, the support 10 and the developer coating layer 2
The pressure-sensitive recording sheet formed by the layers 2, 24 and the coloring agent coating layers 26, 28 is sealed by the waterproof layers 30 and 32, so that the water resistance is improved and the reliability is increased. Here, the outer supports 14 and 16 are adhered to the center support 12 and the waterproof layer 3
Since the reference numerals 0 and 32 are adhered to the central support 12, the outer supports 14 and 16 for holding the color former and the developer are used.
Is stable without moving under the waterproof layers 30 and 32.

Further, since the support 10 is made opaque and milky white, it is easy to confirm the color development of the color former, and the density can be measured with high accuracy. The three supports 12, 1
Although all 4 and 16 may be opaque and milky white, the same effect can be obtained by making at least one of them opaque and milky white and the other transparent.

FIG. 2 is a plan view of an occlusal pressure diagnostic sheet 34 using the pressure-sensitive recording sheet shown in FIG. The sheet 34 is formed in a substantially horseshoe shape substantially along the human dental arch, and is used by being pressed and colored by being bitten while being inserted between upper and lower dental arches in the oral cavity.

In this figure, a broken line 36 indicates the outer shape of the outer supports 14 and 16 in FIG. 1, and the outer periphery of the broken line 36 corresponds to the laminated adhesive portion between the center support 10 and the waterproof layers 30 and 32. Become.

FIG. 3 is a partial sectional view of another embodiment. In this embodiment, the waterproof layers 30, 32 in FIG. 1 are omitted. Therefore, since there is no need to bond the waterproof layer, the support 10A was formed of a single sheet.

[0023]

According to the first aspect of the present invention, as described above, a color-developing agent coating layer having a different set pressure is formed on both surfaces of a support via a color-developing agent coating layer. The pressure can be detected with high accuracy without overlapping the recording sheets, and the device can be easily used.

According to the second aspect of the present invention, the two color forming agent coating layers can be covered with the waterproof layer without applying an adhesive, and can be bonded and sealed at the outer peripheral edge of the support, thereby improving water resistance and reliability. Can be. In addition, the waterproof layer does not move with respect to the support and is stabilized. Here, if the support is made milky white, color development can be detected easily and accurately (claim 3). Further, if this pressure-sensitive recording sheet is formed in a horseshoe shape substantially along the dental arch, a sheet suitable for occlusal pressure diagnosis can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of the present invention.

FIG. 2 is a plan view of an occlusal pressure diagnostic sheet.

FIG. 3 is a partial sectional view of another embodiment.

[Explanation of symbols]

 10, 10A support 12 center support 14, 16 outer support 18, 20 adhesive layer 22, 24 developer coating layer 26, 28 coloring agent coating layer 30, 32 waterproof layer 34 bite pressure diagnostic sheet

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-137992 (JP, A) JP-A-57-192537 (JP, A) JP-A-1-107754 (JP, A) JP-A-56-1979 142430 (JP, A) JP-A-64-80831 (JP, A) JP-A-63-51233 (JP, U)

Claims (4)

(57) [Claims] An opaque sheet-like synthetic resin support,
It has a developer application layer formed on both surfaces of the support, and two colorant application layers formed on both the developer application layers and having different color setting pressures, respectively. Pressure-sensitive recording sheet. 2. The method according to claim 1, wherein the support has three layers, and the outer support is bonded to an adhesive layer applied to both surfaces of the center support. 2. The pressure-sensitive recording sheet according to claim 1, wherein a peripheral edge of a transparent synthetic resin waterproof layer that directly covers the surfaces of the two coloring agent coating layers is bonded to the protruding edge. 3. The support according to claim 1, wherein the support is milky white.
Pressure-sensitive recording sheet. 4. An occlusal pressure diagnostic sheet, wherein the pressure-sensitive recording sheet according to claim 2 is formed in a substantially horseshoe shape substantially following the shape of a dental arch.