KR102633739B1 - Braille tape - Google Patents

Abstract

The disclosed content includes a first base layer having a protruding Braille portion, a second base layer formed to be spaced apart from the first base layer, an adhesive layer provided between the first base layer and the second base layer, and the second base layer. It relates to a braille tape including an adhesive layer formed on a lower surface, and release paper provided on a lower surface of the adhesive layer.

Description

Braille tape {BRAILLE TAPE}

The content disclosed in this specification relates to Braille tape.

Unless otherwise indicated herein, the material described in this section is not prior art to the claims of this application, and is not admitted to be prior art by inclusion in this section.

In general, Braille is a special code that allows visually impaired people who cannot identify objects with their eyes to read with the tactile sense of their fingertips. It is formed by placing dots on the paper using a pen or press machine.

This type of Braille was invented by Louis Braille, a blind Frenchman, in 1829, and in the West it is called Braille after the inventor. However, in addition to the Braille-style 6-dot Braille, there is also a 4-dot New York Point, but in Korea, Hunmaengjeongeum, created by Songam Park Doo-seong based on Hunminjeongeum, is used.

Meanwhile, today, electronic products and various smart devices are developing very rapidly, and there are many electronic products and smart devices with Braille for the visually impaired, examples of which are disclosed in the following patent documents.

In Patent Document 1, numbers and braille are formed on the surface of each button constituting the keypad unit, corresponding marks and braille are formed on each button constituting the operation pad unit, and a plurality of devices outputs vibration in the form of braille on the back surface of the display. A mobile phone for the visually impaired is disclosed that is equipped with two vibrators and allows characters to be input and transmitted using Braille on each button and at the same time recognize the received text as vibration in the form of Braille sounding through the display surface, Patent Document 2 It is formed in the same size and shape as a mobile phone key button, and consists of a plurality of adhesive sheets made of transparent synthetic resin and Braille formed on the surface of the adhesive sheet so that a visually impaired person can sense the protrusions or perforated grooves through the sense of touch. Braille stickers for mobile phone key buttons that are attached to each mobile phone key button are disclosed.

However, in the case of the above-mentioned Patent Document 1, there is a problem of relatively high manufacturing costs because separate facilities must be equipped to manufacture only mobile phones for the visually impaired, and in the case of Patent Document 2, although it can be used by attaching to a general mobile phone, it is only used for mobile phones. Because of its limited applicability, there are limits to its application to electronic products such as washing machines, vacuum cleaners, and dishwashers, so the need for technology that can be applied to all electronic products such as washing machines, vacuum cleaners, and dishwashers is urgently needed.

Republic of Korea Patent Publication No. 10-2012-0041866 (2012.05.03) Republic of Korea Patent Publication No. 10-2009-0071983 (2009.07.02)

We aim to provide braille tapes that can be applied to a variety of electronic products such as washing machines, vacuum cleaners, and dishwashers.

Additionally, it is not limited to the technical challenges described above, and it is obvious that other technical challenges may be derived from the description below.

According to one embodiment of the disclosed content, the braille tape includes a first base layer having a protruding braille portion, a second base layer formed to be spaced apart from the first base layer, and a braille tape provided between the first base layer and the second base layer. It includes an adhesive layer, an adhesive layer formed on the lower surface of the second base layer, and a release paper provided on the lower surface of the adhesive layer.

In addition, the first base layer and the second base layer include at least one selected from polyethylene terephthalate and polyethylene naphthalate, and the thickness of the first base layer is the same as or thicker than the thickness of the second base layer. It can be.

Additionally, the adhesive layer may include one or more selected from polyurethane resin, phenol resin, melamine resin, alkyd resin, epoxy resin, unsaturated polyester resin, urea resin, silicon resin, acrylic resin, and rubber.

Additionally, the thickness of the adhesive layer may be the same as or thinner than the thickness of the adhesive layer.

Additionally, the adhesive layer may include one or more selected from polyurethane resin, acrylic resin, silicon resin, and rubber.

Additionally, the release paper may include one or more selected from paper and polyethylene terephthalate.

Additionally, at least one side of the release paper may be embossed to facilitate detachment from the adhesive layer, or may be coated with one or more materials selected from silicon and francium.

According to an embodiment disclosed in the present specification, by further providing a base layer and an adhesive layer, the generation and shrinkage of bubbles due to UV curing are minimized compared to the existing one, which not only improves visibility but also improves product quality.

In addition, forming the Braille portion using coating and printing methods has the effect of more easily satisfying the standards provided by the Korea Consumers with Disabilities Association.

In addition, it has the effect of increasing accessibility so that visually impaired people can equally enjoy services related to the latest devices like non-disabled people.

Figure 1 is a schematic diagram showing a state in which a Braille tape according to an embodiment of the disclosure disclosed herein is mounted on an electronic product.
Figure 2 is a cross-sectional view showing a Braille tape according to an embodiment of the content disclosed in the present specification.
Figure 3 is an exploded perspective view of Figure 2.
Figures 4 and 5 are exploded perspective views showing different forms of the adhesive layer.

Hereinafter, the configuration and operational effects of preferred embodiments of the disclosed content will be examined with reference to the attached drawings. For reference, in the drawings below, each component is omitted or schematically shown for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals refer to the same components throughout the specification, and reference numerals for the same components in individual drawings will be omitted.

FIG. 1 is a schematic diagram showing a state in which a Braille tape according to an embodiment of the disclosure disclosed herein is mounted on an electronic product, and FIG. 2 is a cross-sectional view showing a Braille tape according to an embodiment of the disclosure disclosed herein, FIG. 3 is an exploded perspective view of Figure 2.

Referring to FIG. 1, the Braille tape 100 according to an embodiment of the content disclosed in the present specification is attached to the control panel of an electronic product 1 such as a washing machine, washer dryer, refrigerator, air conditioner, vacuum cleaner, and dishwasher to enable the visually impaired. Accessibility for the visually impaired was strengthened by providing information so that the control panel of this electronic product (1) could be read. In addition, of course, the Braille tape 100 can be further provided with a guide explaining the meaning of the Braille attached to the control panel of the electronic product 1 and a simple operation method.

As shown in FIGS. 2 and 3, the Braille tape 100 includes a first base layer 21 having a Braille portion 10, a second base layer 22, an adhesive layer 30, and an adhesive layer ( 40), and release paper 50.

The first base layer 21 is the outermost layer and may include one or more selected from polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), but has high transparency and good insulation properties. If it is a material, there are no significant restrictions on its use. Additionally, the refractive index of the first base layer 21 may be in the range of 1.0 to 2.0, and preferably in the range of 1.5 to 1.6.

The thickness of the first base layer 21 may be the same as or thicker than the thickness of the second base layer 22, which will be described later, and may preferably be formed thicker. For example, the thickness of the first base layer 21 may satisfy the range of 1 to 200㎛, preferably 1 to 150㎛, and most preferably 1 to 100㎛, which means that the thickness of the first base layer 21 is in the range of 1 to 150㎛. If it is less than 1㎛, the thickness may be too thin to form a braille portion using coating and printing methods, and if it exceeds 200㎛, the overall thickness may be unnecessarily thick.

Meanwhile, a protruding braille portion 10 may be provided on the upper surface of the first base layer 21. The braille portion 10 is formed by a coating and printing method and is integral with the first base layer 21. It can be formed or separately formed and installed, and can be made of polyurethane resin, phenolic resin, melamine resin, alkyd resin, epoxy resin, and unsaturated polyester resin. It may be formed of one or more selected from (unsaturated polyester resin), urea resin, silicone resin, and acrylic resin, preferably acrylic resin. In this embodiment, the standard provided by the Korea Consumers with Disabilities Association can be more easily satisfied by replacing the existing pressing method used to form the Braille portion 10 with a coating and printing method.

For example, the braille portion 10 is preferably formed to meet the standards provided by the Korea Consumers with Disabilities Association. Specifically, the height of the braille portion 10 may be in the range of 0.5 to 0.8 mm, preferably 0.6 to 0.7 mm, , the spacing between braille may be around 5.0mm. In this way, by providing the Braille unit 10, accessibility can be further strengthened so that visually impaired people can equally enjoy services related to the latest devices, including electronic products, like non-disabled people.

The second base layer 22 is spaced apart from the first base layer 21 and may include one or more selected from polyethylene terephthalate (PET) and polyethylene naphthalate (PEN). As long as it is a material with high transparency and good insulation properties, there are no significant restrictions on its use.

For example, the second base layer 22 may be formed of the same material as the first base layer 21 or may be formed of a different material. For example, the first base layer 21 may be made of polyethylene terephthalate (Polyethylene terephthalate). If formed of PET), the second base layer 22 may be formed of polyethylene naphthalate (PEN), and if the first base layer 21 is formed of polyethylene naphthalate (PEN), the second base layer 22 may be formed of polyethylene naphthalate (PEN). 2 The base layer 22 may be formed of polyethylene terephthalate (PET). As mentioned above, different materials may be used for the purpose of adjusting the refractive index between the second base layer 22 and the first base layer 21.

The thickness of the second base layer 22 may be within the range of 1 to 100 ㎛, preferably 1 to 80 ㎛, and most preferably 1 to 50 ㎛. If it is less than 1 ㎛, it is easily deformed by external impact. If it exceeds 100㎛, the overall thickness may become thicker than necessary. In this embodiment, in addition to the second base layer 22, the adhesive layer 30, which will be described later, is further provided, thereby minimizing the generation and shrinkage of bubbles due to UV curing and improving the quality of the product by increasing durability compared to the existing product.

The adhesive layer 30 is provided between the first base layer 21 and the second base layer 22, and tightly fixes the first base layer 21 and the second base layer 22 to protect against external pressure. This can prevent the second base layer 22 from being separated from the first base layer 21. This adhesive layer 30 is made of polyurethane resin, phenolic resin, melamine resin, alkyd resin, epoxy resin, and unsaturated polyester resin. ), one or more selected from urea resin, silicone resin, acrylic resin, and rubber, preferably epoxy resin and acrylic resin. One or more selected from among, more preferably, epoxy resin and acrylic resin may be mixed at a weight ratio of 2:1. Therefore, it may be possible to achieve the target adhesive strength while preventing shrinkage when cured by UV. In this embodiment, it is preferable to use an epoxy resin with a softening point of 85°C or lower and an average epoxy equivalent weight of 500 to 1000, including cresol novolac epoxy resin, bisphenol A type novolac epoxy resin, and phenol novolac epoxy. One or more selected from among resins, tetrafunctional epoxy resins, biphenyl-type epoxy resins, naphthalene-type epoxy resins, and dicyclopentadiene-type epoxy resins can be used. Acrylic resin refers to a vinyl-based copolymer resin mainly composed of acrylic acid, methacrylic acid, and their derivatives. It can be used if it satisfies the range of tensile strength of 700~900kg/㎠ and elastic modulus of 3.0~ ^4.0X104 ㎏/㎠. There are no significant restrictions on

The thickness of the adhesive layer 30 may be the same as or thinner than the thickness of the adhesive layer 40, which will be described later, and may preferably be formed thinner. For example, the thickness of the adhesive layer 30 may satisfy the range of 1 to 50 ㎛, preferably 1 to 40 ㎛, and most preferably 1 to 30 ㎛, but if it is less than 1 ㎛, it is difficult to implement sufficient adhesive strength. Not only can the second base layer 22 be easily separated from the first base layer 21, but also bubbles may be generated during UV curing, which may worsen visibility. If the thickness exceeds 50㎛, the effect of using it more than necessary is not very significant. It may not be possible.

Figures 4 and 5 are exploded perspective views showing different forms of the adhesive layer.

Meanwhile, the adhesive layer 30 may be provided on the entire contact area between the first base layer 21 and the second base layer 22 as shown in FIG. 3, but as shown in FIG. 4, the adhesive layer 130 ) may be provided only in areas corresponding to the edges of the first base layer 21 and the second base layer 22, or the adhesive layer 230 may be provided in a straight line pattern as shown in FIG. 5, which is shown in the figure. Of course, diagonal patterns and dot patterns are also possible. The straight line pattern is made up of a plurality of straight lines spaced at regular intervals, and in this case, the width (W) of the straight lines and the distance (D) between the straight lines may be the same, and may specifically be in the range of 0.01 to 0.1 mm. If the above-mentioned range is satisfied, it is possible to achieve an adhesive strength of 50 to 60 kg/20 mm at a temperature of 20°C while reducing raw material costs. In addition, the overall weight can be reduced, making the final product, the Braille tape, lighter.

The adhesive layer 40 is formed on the lower surface of the second base layer 22 and is selected from polyurethane resin, acrylic resin, silicone resin, and rubber. It may be composed of one or more, preferably silicone resin. The thickness of the adhesive layer 40 may be the same as or thicker than that of the adhesive layer 30, and may preferably be formed thicker. For example, the thickness of the adhesive layer 40 may satisfy the range of 10 to 100 ㎛, preferably 10 to 80 ㎛, and most preferably 10 to 50 ㎛, but if it is less than 10 ㎛, it is difficult to implement sufficient adhesive strength. It can easily be separated from the adherend, and if it exceeds 100㎛, the effect may not be so great as it is used more than necessary.

Meanwhile, both the adhesive layer 40 and the adhesive layer 30 may be formed using one or more coaters selected from a slot die coater, a comma coater, a blade coater, a gravure coater, a bar coater, and a lip coater, preferably It can be formed by using a comma coater at a speed of 1 to 5 m/min.

The release paper 50 is provided on the lower surface of the adhesive layer 40 and may include one or more selected from paper and polyethylene terephthalate (PET). In this embodiment, paper refers to a thin sheet-like material made from wood pulp or fibrous materials.

Meanwhile, on at least one side of the release paper 50, specifically, on one side of the release paper 50 in contact with the adhesive layer 40, an emboss 53 is formed to facilitate detachment from the adhesive layer 40, or silicon (Si) and One or more materials selected from francium (Fr) may be formed as a coating. Although not shown in the drawing, one or more materials selected from silicon (Si) and francium (Fr) may be provided throughout the release paper 50, but may be provided only in the area corresponding to the border of the adhesive layer 40 or in a straight line. It may be provided as a pattern, but is not limited thereto. Therefore, when the release paper 50 is removed from the adhesive layer 40, it can be peeled off with a small amount of force, and residues of the adhesive layer 40 can be prevented from sticking to the release paper 50.

<Example 1>

An acrylic resin satisfying the range of tensile strength of 800 kg/cm2 and elastic modulus of ^3.5 Next, silicon resin was coated on the lower surface of the PET film to a thickness of 15㎛ using the Comma Knife method, and release paper was attached to one side. Then, a braille tape was manufactured by forming a braille portion at a height of 0.7 mm on the upper surface of the PET film using UV printing.

<Example 2>

A Braille tape was manufactured using the same ingredients and methods as in Example 1, except that a 25 ㎛ thick PEN film was used instead of a 25 ㎛ thick PET film.

<Example 3>

A braille tape was manufactured using the same ingredients and methods as in Example 1, except that epoxy resin with a softening point of 80°C was used instead of acrylic resin.

<Comparative Example 1>

Silicone resin was coated on the lower surface of the 75㎛ thick PET film to a thickness of 15㎛ using the Comma Knife method, and release paper was attached to one side. Then, a braille tape was manufactured by forming a braille portion on the upper surface of the PET film using a pressing method.

Experimental Example 1. Physical property evaluation

The physical properties of Examples 1 to 3 and Comparative Example 1 were evaluated by the following method, and the results are shown in Table 1.

<Evaluation method>

(1) Braille standard evaluation

OK: When the height of the braille part satisfies 0.6~0.7mm

NG: When the height of the braille part is less than 0.5mm

(2) Visibility evaluation

Image brightness was measured in accordance with JIS K7374.

OK: The image brightness value is 88% or more.

NG: Image brightness value is less than 88%

(3) Bubble generation evaluation

OK: When no bubbles are generated at the adhesive interface when observed with an optical microscope, or small amounts of bubbles with a diameter of 100㎛ or less are observed dispersed.

NG: When observing with an optical microscope, bubbles with a diameter of 100㎛ or more are generated at the adhesive interface, or bubbles with a diameter of 100㎛ or less are observed in a large cluster.

division Example 1 Example 2 Example 3 Comparative Example 1 Braille standards OK OK OK NG visibility OK OK OK NG bubble OK OK OK NG

Referring to Table 1, Examples 1 to 3, which were provided with two more layers, showed good results in all braille specifications, visibility, and bubble evaluation compared to Comparative Example 1. In addition, considering that the Braille standard evaluation of Comparative Example 1 was NG, it could be inferred that it was difficult to satisfy the standards provided by the Korea Consumers Association for the Disabled using the type pressure method.

The disclosed content is merely an example, and various modifications and implementations may be made by those skilled in the art without departing from the gist of the claims, so the scope of protection of the disclosed content is limited to the above-mentioned specific scope. It is not limited to the examples.

1: Electronics
100: Braille tape
10: Braille section
21: first substrate layer
22: second substrate layer
30, 130, 230: Adhesive layer
40: Adhesive layer
50: Release paper

Claims (7)

delete A first base layer including a protruding Braille portion;
a second base layer spaced apart from the first base layer;
an adhesive layer provided between the first and second base layers;
an adhesive layer formed on the lower surface of the second base layer; and
Includes a release paper provided on the lower surface of the adhesive layer,
The first and second base layers are made of polyethylene naphthalate,
The thickness of the first base layer is 1 to 150㎛, and the thickness of the second base layer is 1 to 80㎛, but the thickness of the first base layer is thicker than the thickness of the second base layer,
The adhesive layer has a thickness of 1 to 50㎛ and contains epoxy resin and acrylic resin at a weight ratio of 2:1,
The adhesive layer has a thickness of 10 to 100 μm and contains silicon resin,
The thickness of the adhesive layer is the same as or thinner than the thickness of the adhesive layer,
The epoxy resin has a softening point of 85°C or lower and an average epoxy equivalent weight of 500 to 100,
The acrylic resin has a tensile strength of 700 to 900 kg/cm ² and an elastic modulus of 3.0 to 4.0×10 ⁴ kg/cm ² ,
The adhesive layer is provided in a straight line pattern, and the straight line pattern consists of a plurality of straight lines spaced at regular intervals, and the width and distance of the straight lines are 0.01 to 0.1 mm.
delete delete delete delete According to paragraph 2,
A braille tape in which at least one side of the release paper is embossed to facilitate detachment from the adhesive layer or coated with at least one material selected from silicon and francium.

Images