WO2022234891A1

WO2022234891A1 - Braille tape

Info

Publication number: WO2022234891A1
Application number: PCT/KR2021/008887
Authority: WO
Inventors: 구태욱; 권익수; 박민수; 최훈; 이찬희; 서민식
Original assignee: 주식회사 영우
Priority date: 2021-05-07
Filing date: 2021-07-12
Publication date: 2022-11-10
Also published as: KR102633739B1; KR20220151993A

Abstract

Disclosed is a braille tape comprising: a first base layer provided with protruding braille portions; a second base layer spaced apart from the first base layer; a bonding layer provided between the first base layer and the second base layer; an adhesive layer formed on the lower surface of the second base layer; and a release sheet provided on the lower surface of the adhesive layer.

Description

braille tape

The subject matter disclosed herein relates to a braille tape.

Unless otherwise indicated herein, the material described in this section is not prior art to the claims of this application, and inclusion in this section is not an admission that it is prior art.

In general, Braille is a special code letter that allows blind people who cannot identify objects with their eyes to read with the tactile sense of their fingertips.

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

On the other hand, today's 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 number of vibrations in the form of braille are output on the back surface of the display. A mobile phone for the visually impaired is disclosed, which is equipped with two vibrators, so that characters can be input and transmitted using Braille on each button, and at the same time, the received text can be recognized as a vibration in the form of Braille resounding through the display surface, Patent Document 2 is formed in the same size and shape as the key button of a mobile phone, and consists of a plurality of adhesive sheets made of a transparent synthetic resin and Braille which is formed on the surface of the adhesive sheet so that the visually impaired can sense the protrusions or perforated grooves by tactile sense. Braille stickers for mobile phone key buttons that are respectively attached to mobile phone key buttons are disclosed.

However, in the case of the aforementioned Patent Document 1, there is a problem that the manufacturing cost is relatively high because a facility for manufacturing only the mobile phone for the visually impaired must be separately provided, and in the case of Patent Document 2, although it can be used by attaching it to a general mobile phone, only the mobile phone Because of its limited applicability, there is a limit to its application to electronic products such as washing machines, vacuum cleaners, and dishwashers. Therefore, there is an urgent need for a technology applicable to electronic products such as washing machines, vacuum cleaners and dishwashers.

We would like to provide a braille tape that can be applied to electronic products such as washing machines, vacuum cleaners and dishwashers.

In addition, it is not limited to the technical problems as described above, and it is obvious that another technical problem may be derived from the following description.

According to an embodiment of the disclosure, the braille tape is provided between a first base layer having a protruding braille part, a second base layer formed to be spaced apart from the first base layer, and 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. can be

In addition, the adhesive layer may include at least one selected from a polyurethane resin, a phenol resin, a melamine resin, an alkyd resin, an epoxy resin, an unsaturated polyester resin, a urea resin, a silicon resin, an acrylic resin, and rubber.

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

In addition, the adhesive layer may include at least one selected from a polyurethane resin, an acrylic resin, a silicon resin, and rubber.

In addition, the release paper may include at least one selected from paper and polyethylene terephthalate.

In addition, at least one surface of the release paper may be embossed to facilitate detachment from the adhesive layer or 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, there is an effect of not only excellent visibility but also improving product quality by minimizing bubble generation and shrinkage due to UV curing compared to the existing ones.

In addition, there is an effect that can more easily satisfy the standards provided by the Korean Consumers with Disabilities Association by forming the braille part by coating and printing method.

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.

1 is a schematic diagram showing a state in which a braille tape is mounted on an electronic product according to an embodiment of the content disclosed in the present specification.

2 is a cross-sectional view showing a braille tape according to an embodiment of the content disclosed herein.

3 is an exploded perspective view of FIG. 2 .

4 and 5 are exploded perspective views showing another form of the adhesive layer.

Hereinafter, with reference to the accompanying drawings, the configuration and effects of preferred embodiments of the disclosed subject matter will be described. For reference, in the following drawings, each component is omitted or schematically illustrated 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.

1 is a schematic view showing a state in which a braille tape is mounted on an electronic product according to an embodiment of the content disclosed in the present specification, and FIG. 2 is a cross-sectional view showing a braille tape according to an embodiment of the content disclosed in the present specification, FIG. 3 is an exploded perspective view of FIG. 2 .

Referring to FIG. 1 , the braille tape 100 according to an embodiment of the content disclosed herein is attached to the operation unit of an electronic product 1 such as a washing machine, a washing machine, a dryer, a refrigerator, an air conditioner, a vacuum cleaner and a dishwasher, and the visually impaired. The accessibility of the visually impaired was strengthened by providing information so that the operation part of this electronic product (1) could be read. In addition, it goes without saying that the braille tape 100 may further include a guide for explaining the meaning of braille attached to the operation unit 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 part 10, a second base layer 22, an adhesive layer 30, and an adhesive layer ( 40), and a release paper 50.

The first base layer 21 is an outermost layer and may include at least one selected from polyethylene terephthalate (　PET) and polyethylene naphthalate (PEN), but has high transparency and good thermal insulation properties. If it is a material, it is not significantly limited in its use. In addition, the refractive index of the first base layer 21 may be in the range of 1.0 to 2.0, preferably 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 to be described later, and preferably may be thicker. For example, the thickness of the first base layer 21 may be in the range of 1 to 200 µm, preferably 1 to 150 µm, and most preferably 1 to 100 µm, which means that the thickness of the first base layer 21 is If it is less than 1 μm, it may be difficult to form the Braille part by coating and printing because the thickness is too thin, and if it exceeds 200 μm, the overall thickness may be thicker than necessary.

On the other hand, the upper surface of the first base layer 21 may be provided with a protruding braille part 10 , the braille part 10 is formed by coating and printing methods and is integrally formed with the first base layer 21 . It can be formed or separately formed and installed. Polyurethane resin, Phenolic resin, Melamine resin, Alkyd resin, Epoxy resin, unsaturated polyester resin (Unsaturated polyester resin), urea resin (Urea resin), silicon resin (Silicone resin), and at least one selected from acrylic resin (Acrylic resin), it may be formed of preferably an acrylic resin (Acrylic resin). In this embodiment, it is possible to more easily satisfy the standard provided by the Korean Consumers with Disabilities Association by replacing the existing pressing method used to form the Braille part 10 with a coating and printing method.

For example, the braille part 10 is preferably formed to satisfy the standards provided by the Korean Consumers with Disabilities Association, and specifically, the height of the braille part 10 may be in the range of 0.5 to 0.8 mm, preferably 0.6 to 0.7 mm, and , the spacing between the braille may be around 5.0mm. As such, by having the braille unit 10, accessibility can be further strengthened so that the visually impaired 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 at least one selected from polyethylene terephthalate (PET) and polyethylene naphthalate (PEN). If it is a material with high transparency and good thermal insulation, its use is not significantly limited.

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 include polyethylene terephthalate, PET), the second base layer 22 may be made of polyethylene naphthalate (PEN), and when the first base layer 21 is made of polyethylene naphthalate (PEN), the second base layer 22 may be made of polyethylene naphthalate (PEN). 2 The base layer 22 may be formed of polyethylene terephthalate (PET). As mentioned above, different materials may be applied 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 1 to 100 μm, preferably 1 to 80 μm, and most preferably 1 to 50 μm, which is less than 1 μm, easily deformed by an external impact. If it exceeds 100 μm, the overall thickness may become thicker than necessary. In this embodiment, in addition to the second base layer 22, an adhesive layer 30, which will be described later, is further provided, thereby minimizing the generation and reduction of bubbles due to UV curing compared to the conventional one, and increasing durability to improve product quality.

The adhesive layer 30 is provided between the first base layer 21 and the second base layer 22, and by tightly fixing between the first base layer 21 and the second base layer 22, it is resistant to external pressure. Thus, it is possible to prevent in advance that the second base layer 22 is separated from the first base layer 21 . The adhesive layer 30 is a polyurethane resin, a phenolic resin, a melamine resin, an alkyd resin, an epoxy resin, an unsaturated polyester resin ), urea resin, silicone resin, acrylic resin, and at least one selected from rubber, preferably epoxy resin and acrylic resin At least one selected from among, more preferably, an epoxy resin and an acrylic resin may be formulated in a weight ratio of 2: 1. Therefore, it may be possible to realize a target adhesive strength while preventing shrinkage when cured by UV. As the epoxy resin in this embodiment, it is preferable to use a softening point of 85° C. or less and an average epoxy equivalent of 500 to 1000, cresol novolac epoxy resin, bisphenol A type novolac epoxy resin, phenol novolac epoxy At least one selected from a resin, a tetrafunctional epoxy resin, a biphenyl-type epoxy resin, a naphthalene-type epoxy resin, and a dicyclopentadiene-type epoxy resin may be used. Acrylic resin is a general term for vinyl ^- based copolymer resins containing acrylic acid and methacrylic acid and their derivatives as main components. is not significantly limited in

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 preferably may be formed thinner. For example, the thickness of the adhesive layer 30 may satisfy the range of 1 to 50 μm, preferably 1 to 40 μm, and most preferably 1 to 30 μm. If it is less than 1 μm, it is difficult to realize sufficient adhesive strength. Not only can the second base layer 22 be easily separated from the first base layer 21, but also air bubbles may be generated during UV curing to deteriorate visibility. it may not be

On the other hand, although the adhesive layer 30 may be provided on the entire contact area with the first base layer 21 and the second base layer 22 as shown in FIG. 3 , the adhesive layer 130 as shown in FIG. 4 . ) is provided only in the region 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 pattern as shown in FIG. Of course, diagonal patterns and dot patterns are also possible. The straight line pattern is made of a plurality of straight lines spaced apart at regular intervals, and in this case, the width (W) of the straight line and the distance (D) between the straight lines may be the same, and specifically, may be in the range of 0.01 to 0.1 mm. When the above-mentioned range is satisfied, it is possible to realize an adhesive strength of 50 to 60 kg/20 mm at a temperature condition of 20° C. while reducing the raw material cost. Also, it is possible to reduce the total weight, so that the final product, the braille tape, can be reduced in weight.

The adhesive layer 40 is formed on the lower surface of the second base layer 22, and is selected from among polyurethane resin, acrylic resin, silicone resin, and rubber. It may be composed of one or more, preferably a silicone resin. The thickness of the adhesive layer 40 may be the same as or thicker than the thickness of the adhesive layer 30 , and preferably may be formed to be thicker. For example, the thickness of the adhesive layer 40 may satisfy the range of 10 to 100 μm, preferably 10 to 80 μm, and most preferably 10 to 50 μm. If it is less than 10 μm, it is difficult to implement sufficient adhesive strength. It can be easily separated from the adherend, and if it exceeds 100 μm, the effect may not be so great due to use 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 performing at a speed of 1-5 m/min using a comma coater.

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

On the other hand, at least one surface of the release paper 50, specifically, on one surface of the release paper 50 in contact with the pressure-sensitive adhesive layer 40, an embossing 53 is formed to facilitate detachment from the pressure-sensitive adhesive layer 40, or silicon (Si) and One or more materials selected from francium (Fr) may be coated. Although not shown in the drawings, one or more materials selected from silicon (Si) and francium (Fr) may be provided on the entire release paper 50 , but only in an area corresponding to the edge of the adhesive layer 40 or straight line It may be provided in a pattern, but is not limited thereto. Accordingly, when the release paper 50 is removed from the adhesive layer 40 , peeling is possible even with a small force, and the residue of the adhesive layer 40 can be prevented from sticking to the release paper 50 .

An acrylic resin satisfying a tensile strength of 800 kg/cm 2 and an elastic modulus of 3.5×10 ⁴ kg/cm 2 was applied between a 75 μm thick PET film and a 25 μm thick PET film with a thickness of 10 μm, followed by UV curing and adhesion. Then, a silicone resin was coated on the lower surface of the PET film to a thickness of 15 μm by a Comma Knife method, and a release paper was attached to one surface. Then, a braille tape was manufactured by forming a braille part to a height of 0.7 mm by UV printing on the upper surface of the PET film.

A braille tape was prepared in the same manner as in Example 1, except that a PEN film having a thickness of 25 μm was used instead of a PET film having a thickness of 25 μm.

A braille tape was prepared in the same manner as in Example 1 except that an epoxy resin having a softening point of 80° C. was used instead of the acrylic resin.

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

실험예 1. 물성 평가Experimental Example 1. Evaluation of physical properties

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.

(1) Braille standard evaluation

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

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

(2) Visibility evaluation

Image sharpness was measured based on JIS K7374.

OK: The value of image sharpness is 88% or more

NG: The value of image sharpness is less than 88%

(3) Bubble generation evaluation

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

NG: When observed with an optical microscope, when bubbles with a diameter of 100 μm or more are generated at the adhesion interface, or when bubbles with a diameter of 100 μm or less are observed in a large clustered state

구분division	실시예 1Example 1	실시예 2Example 2	실시예 3Example 3	비교예 1Comparative Example 1
점자규격braille standard	OKOK	OKOK	OKOK	NGNG
시인성visibility	OKOK	OKOK	OKOK	NGNG
기포bubble	OKOK	OKOK	OKOK	NGNG

Referring to Table 1, in the case of Examples 1 to 3 having two more layers, compared to Comparative Example 1, all of the results were good in Braille standards, visibility and bubble evaluation. In addition, considering that the evaluation of the Braille standard of Comparative Example 1 was NG, it was possible to guess from the fact that it was difficult to satisfy the standard provided by the Korean Consumers with Disabilities Association with the pressing method.

The disclosed content is merely an example, and since various changes can be made by those skilled in the art without departing from the gist of the claims claimed in the claims, the protection scope of the disclosed content is limited to the specific It is not limited to an Example.

[Explanation of code]

1: Electronics

100: braille tape

10: Braille

21: first base layer

22: second base layer

30, 130, 230: adhesive layer

40: adhesive layer

50: Lee Hyungji

Claims

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;

an adhesive layer formed on the lower surface of the second base layer; and

A braille tape comprising a release paper provided on the lower surface of the adhesive layer.
According to claim 1,

The first base layer and the second base layer include at least one selected from polyethylene terephthalate and polyethylene naphthalate,

The thickness of the first base layer is equal to or thicker than the thickness of the second base layer.
According to claim 1,

The adhesive layer is a polyurethane resin, a phenol resin, a melamine resin, an alkyd resin, an epoxy resin, an unsaturated polyester resin, a urea resin, a silicon resin, an acrylic resin, and a braille tape comprising at least one selected from rubber.
According to claim 1,

The thickness of the adhesive layer is equal to or thinner than the thickness of the adhesive layer.
According to claim 1,

The adhesive layer is a braille tape comprising at least one selected from a polyurethane resin, an acrylic resin, a silicon resin, and rubber.
According to claim 1,

The release paper is a braille tape comprising at least one selected from paper and polyethylene terephthalate.
7. The method of claim 6,

At least one surface of the release paper is embossed to facilitate detachment from the adhesive layer, or a braille tape coated with one or more materials selected from silicon and francium.