Embossed PVC tape

Abstract

To provide an embossed PVC tape.SOLUTION: An embossed PVC tape has a first surface and a second surface that are opposite to each other. The embossed PVC tape has an embossed texture formed on the first surface. The embossed texture includes a plurality of repeating patterns, and each of the repeating patterns includes an upper portion of the first surface and a side portion recessed in the first surface. The side portion has a tapered shape, and an apex of the tapered shape is defined as an end point. On the first surface, a quantity of the end point formed per 3,000 square microns is one or more. A maximum static friction coefficient between the first surface and the second surface is within a range from 0.72 to 0.78.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a PVC tape, and in particular to an embossed PVC tape. [Background technology]

[0002] Conventional PVC tapes often have to add lubricants or be dusted with talc powder to prevent the opposing sides of the PVC tape from sticking to each other. If the opposing sides of the PVC tape stick too much to each other, the tension of the PVC tape will be too high during continuous printing, which will affect the print quality and slow down the production speed.

[0003] However, the addition of lubricant affects the transparency of the PVC tape, which affects the quality of the print, and the talc powder tends to be distributed unevenly on the PVC adhesive tape, which also affects the quality of the print. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem that the present invention aims to solve is to address the shortcomings of the prior art by providing an embossed PVC tape having a specific slip property (i.e., both sides of the PVC tape do not stick to each other and do not slide relative to each other) without sacrificing print quality. [Means for solving the problem]

[0005] In order to solve the above technical problem, one technical means adopted by the present invention provides an embossed PVC tape, which has a first surface and a second surface opposite to each other, an embossed pattern is formed on the first surface of the embossed PVC tape, the embossed pattern includes a plurality of repeating patterns, each of the repeating patterns includes an upper portion of the first surface and a side portion recessed into the first surface so as to surround a cone-shaped space, the apex of the cone-shaped space being an end point, at least one end point is formed on the first surface per 3,000 square microns, and the maximum static friction coefficient between the first surface and the second surface is 0.72 to 0.78.

[0006] Preferably, each of the repeating patterns has a triangular pyramid shape.

[0007] Preferably, the length of the upper portion in a first direction is 50 μm to 55 μm, and the length of the upper portion in a second direction perpendicular to the first direction is 58 μm to 62 μm.

[0008] Preferably, the depth from the top to the end point is 15 μm to 20 μm.

[0009] Preferably, the plurality of repeating patterns includes a plurality of first repeating patterns and a plurality of second repeating patterns, and the plurality of first repeating patterns and the plurality of second repeating patterns are alternately arranged.

[0010] Preferably, a first included angle between each first repeating pattern and any one of said second repeating patterns that is in line contact with said first repeating pattern is between 80 degrees and 100 degrees.

[0011] Preferably, a second included angle between each of the first repeating patterns and any one of the second repeating patterns that is in point contact with the first repeating pattern is between 110 degrees and 130 degrees.

[0012] Preferably, the embossed PVC tape comprises a PVC resin, a plasticizer and a heat stabilizer.

[0013] Preferably, the content of the plasticizer is 20 parts by weight to 40 parts by weight, and the content of the heat stabilizer is 2 parts by weight to 3 parts by weight, based on 100 parts by weight of the PVC resin.

[0014] Preferably, the embossed PVC tape has a transparency of 90% to 93% and a haze value of 1.8% to 2%. Effect of the Invention

[0015] As an advantageous effect of the present invention, the embossed PVC tape of the present invention provides a certain slip property (i.e., both sides of the PVC tape do not stick to each other and do not slide relative to each other) without sacrificing print quality due to the technical features that "the embossed pattern includes a plurality of repeating patterns, each of which includes an upper portion of the first surface and a side portion configured in the first surface so as to surround a cone-shaped space, the side portion being a cone and having an end point at the apex of the cone-shaped space" and "at least one end point is formed per 3,000 square microns on the first surface." [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic three-dimensional view showing an embossed PVC tape according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a top view showing an embossed PVC tape according to an embodiment of the present invention. [Figure 3A] FIG. 2 is a schematic three-dimensional view showing the process of embossing the embossed PVC tape according to the embodiment of the present invention. [Figure 3B] 1 is a schematic three-dimensional view showing an embossing process of an embossed PVC tape according to an embodiment of the present invention. FIG. [Figure 3C] 1 is a schematic three-dimensional view showing an embossing process of an embossed PVC tape according to an embodiment of the present invention. FIG. [Figure 4A] 2A to 2C are schematic three-dimensional views showing different viewpoints of the embossing process in the embossed PVC tape according to an embodiment of the present invention. [Figure 4B] 2A to 2C are schematic three-dimensional views showing different viewpoints of the embossing process in the embossed PVC tape according to an embodiment of the present invention. [Figure 4C] 2A to 2C are schematic three-dimensional views showing different viewpoints of the embossing process in the embossed PVC tape according to an embodiment of the present invention. [Figure 5A] 2A to 2C are schematic three-dimensional views showing different viewpoints of the embossing process in the embossed PVC tape according to an embodiment of the present invention. [Figure 5B] 2A to 2C are schematic three-dimensional views showing different viewpoints of the embossing process in the embossed PVC tape according to an embodiment of the present invention. [Figure 5C] 2A to 2C are schematic three-dimensional views showing different viewpoints of the embossing process in the embossed PVC tape according to an embodiment of the present invention. [Figure 6] FIG. 2 is a schematic three-dimensional view showing an embossing mold according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] In order to better understand the features and technical contents of the present invention, please refer to the following detailed description of the present invention and the accompanying drawings, which are provided for reference and explanation only and are not intended to limit the scope of the present invention.

[0018] The "embossed PVC tape" according to the embodiment of the present invention will be described below by way of certain specific embodiments, and those skilled in the art will be able to understand the advantages and effects of the present invention based on the contents disclosed in this specification. The present invention can be implemented or applied by other different specific embodiments, and various modifications and changes can be made to each detail in this specification based on different perspectives and applications without departing from the concept of the present invention. In addition, as described in advance, the accompanying drawings of the present invention are simple schematic illustrations and are not drawn based on actual size. The technical contents of the present invention will be described in more detail based on the following embodiments, but the disclosed contents do not limit the protection scope of the present invention.

[0019] It should be understood that, although the present specification may use the terms "first", "second", "third" and the like to describe various elements or signals, these elements or signals are not limited by these terms. These terms are mainly used to distinguish one element from another element or one signal from another signal. In addition, the term "or" used in the present specification may include any one or more combinations of the associated listed items according to actual circumstances.

[0020] As shown in Figs. 1 and 2, Fig. 1 is a schematic three-dimensional view showing an embossed PVC tape according to an embodiment of the present invention, and Fig. 2 is a top view showing an embossed PVC tape according to an embodiment of the present invention. In an embodiment of the present invention, an embossed PVC tape 100 is provided. Specifically, the embossed PVC tape 100 has slip properties. The slip properties can be regarded as a property in which different layers are less likely to stick to each other and are easily separated when the embossed PVC tape 100 is wound up, and which is advantageous for printing. After printing, the embossed PVC tape 100 can be applied to table mats, window stickers, and furniture decorations, but the present invention is not limited to the application range of the embossed PVC tape.

[0021] As shown in Figures 3A to 3C, Figures 4A to 4C, Figures 5A to 5C and Figure 6, Figures 3A to 3C are three-dimensional schematic diagrams showing the embossing process of an embossed PVC tape according to an embodiment of the present invention, Figures 4A to 4C and Figures 5A to 5C are three-dimensional schematic diagrams showing different perspectives of the embossing process of an embossed PVC tape according to an embodiment of the present invention, and Figure 6 is a three-dimensional schematic diagram showing an embossing mold according to an embodiment of the present invention.

[0022] The embossed PVC tape 100 has a first surface S1 and a second surface S2 opposite to each other, and an embossed pattern 1 is formed on the first surface S1 of the embossed PVC tape 100, and no embossed pattern 1 is formed on the second surface S2. The embossed pattern 1 may be formed by embossing the first surface S1 with an embossing mold M (i.e., embossing an unembossed PVC tape U). More specifically, the embossed pattern 1 is formed by heating the unembossed PVC tape ∪ and embossing the first surface S1 using the embossing mold M, and after the embossed pattern 1 is formed, the embossed PVC tape 100 can be cooled and wound up.

[0023] The embossed pattern 1 includes a plurality of repeat patterns 11, each of which includes an upper portion 111 of the first surface S1 and a side portion 112 recessed into the first surface S1 so as to surround a cone-shaped space. The apex of the cone-shaped space is defined as an end point 113. At least one end point 113 is formed per 3,000 square microns on the first surface S1, so that the maximum static friction coefficient between the first surface S1 and the second surface S2 is 0.72 to 0.78.

[0024] In this embodiment, the upper portion 111 is triangular, and the side portion 112 is composed of three triangles. In other words, each of the repeating patterns 11 in this embodiment may be a triangular pyramid-shaped space, but the present invention is not limited to the specific shape of the repeating pattern 11. For example, in other embodiments not shown in the drawings of the present invention, the repeating pattern 11 may be a cone, a pyramid, or other shapes. Also, in this embodiment, one of the corners of the upper portion 111 is 60 degrees, but the present invention is not limited thereto.

[0025] In this embodiment, the "direction V" and the "direction H" shown in FIG. 2 are mutually perpendicular directions, and the "direction V" and the "direction H" are referred to as the "vertical direction V" and the "horizontal direction H", respectively. The length L of the vertical direction V of the upper portion 111 is 50 μm to 55 μm, the width W of the horizontal direction H of the upper portion is 58 μm to 62 μm, and the depth D from the upper portion 111 to the end point 113 is 15 μm to 20 μm. In other words, the area of ​​the upper portion 111 of the repeating pattern 11 is 2,900 square microns to 3,410 square microns. Preferably, the length L of the vertical direction V of the upper portion 111 is about 52 μm, the width W of the horizontal direction H of the upper portion 111 is about 60 μm, and the depth D of the end point 113 of the upper portion 111 is about 17.3 μm. The length L, width W, and depth D of the upper portion 111 as described above provide an appropriate maximum static friction coefficient for the first surface S1 and the second surface 2. If the depth is too shallow or too deep, the maximum static friction coefficient will be too low or too high. The above-mentioned "longitudinal direction V" and "lateral direction H" correspond to the "first direction" and "second direction" of the present invention, respectively.

[0026] In this embodiment, the plurality of repeat patterns 11 includes a plurality of first repeat patterns 11a and a plurality of second repeat patterns 11b, and the plurality of first repeat patterns 11a and the plurality of second repeat patterns 11b are alternately arranged. By alternately arranging the plurality of first repeat patterns 11a and the plurality of second repeat patterns 11b, the plurality of first repeat patterns 11a and the plurality of second repeat patterns 11b can be formed more densely on the first surface S1. Specifically, the first repeat pattern 11a is identical in outer shape to any of the second repeat patterns 11b, and the difference between the first repeat pattern 11a and the second repeat pattern 11b is the installation angle. In other words, the embossed mold M includes a plurality of first repeating bumps M1 whose shape corresponds to the plurality of first repeating patterns 11a, and a plurality of second repeating bumps M2 whose shape corresponds to the plurality of second repeating patterns 11b, and both the first repeating bumps M1 and the second repeating bumps M2 have a triangular pyramid shape.

[0027] It is noteworthy that when one of the first repeat patterns 11a is rotated 60 degrees on a horizontal plane, the first repeat pattern 11a can overlap one of the second repeat patterns 11b. In addition, in this embodiment, each of the first repeat patterns 11a is surrounded by three of the second repeat patterns 11b.

[0028] In this embodiment, a first included angle A1 between each first repeat pattern 11a and any one of the second repeat patterns 11b that are in line contact with the first repeat pattern 11a is 80 degrees to 100 degrees, and a second included angle A2 between each first repeat pattern 11a and any one of the second repeat patterns 11b that are in point contact with the first repeat pattern 11a is 110 degrees to 130 degrees.

[0029] Preferably, the first included angle A1 between each of the first repeat patterns 11a and any one of the second repeat patterns 11b that are in line contact with the first repeat pattern 11a is 85 degrees to 95 degrees, and the second included angle A2 between each of the first repeat patterns 11a and any one of the second repeat patterns 11b that are in point contact with the first repeat pattern 11a is 115 degrees to 125 degrees. More preferably, the first included angle A1 between each of the first repeat patterns 11a and any one of the second repeat patterns 11b that are in line contact with the first repeat pattern 11a is about 90 degrees, and the second included angle A2 between each of the first repeat patterns 11a and any one of the second repeat patterns 11b that are in point contact with the first repeat pattern 11a is about 120 degrees. That is, when the first included angle A1 and the second included angle A2 are set as described above, the first repeating pattern 11a and the second repeating pattern 11b have a triangular pyramid shape, which can provide a more appropriate maximum static friction coefficient.

[0030] It should be noted that line contact means that one edge of the upper portion 111 of the first repeating pattern 11a contacts one edge of the upper portion 111 of the second repeating pattern 11b, and point contact means that one vertex of the upper portion 111 of the first repeating pattern 11a contacts one vertex of the second repeating pattern 11b.

[0031] It is worth noting that, on the embossed mold M, the angle between the first repeat bump M1 and any second repeat bump M2 that is in line contact with the first repeat bump M1 can be regarded as the first included angle A1. Also, the angle between the first repeat bump M1 and the second repeat bump M2 that is in point contact with the first repeat bump M1 can be regarded as the second included angle A2.

[0032] In this embodiment, the embossed PVC tape 100 includes a PVC resin, a plasticizer, and a heat stabilizer. The content of the plasticizer is 20 parts by weight to 40 parts by weight, and the content of the heat stabilizer is 2 parts by weight to 3 parts by weight, with the content of the PVC resin being 100 parts by weight. In this embodiment, the plasticizer may be at least one selected from the group consisting of dioctyl terephthalate (DOTP), bis(2-ethylhexyl) phthalate (DEHP), and diisononyl phthalate (DINP). In addition, the heat stabilizer may be at least one selected from the group consisting of a barium-zinc heat stabilizer, a calcium-zinc heat stabilizer, and a cadmium-barium-zinc heat stabilizer. The flexibility of the embossed PVC tape 100 can be improved depending on the components and content of the plasticizer. The thermal stability of the embossed PVC tape 100 can be improved depending on the components and content of the thermal stabilizer.

[0033] It should be noted that the embossed PVC tape 100 only needs to be given a specific maximum static friction coefficient by the embossed pattern 1, and the present invention does not limit the specific components contained in the embossed PVC tape 100. In other embodiments, the embossed PVC tape 100 may contain components other than the above-mentioned components.

[0034] To explain further, in this embodiment, the embossed PVC tape 100 may not contain any lubricant or talc powder at all. In other embodiments, the embossed PVC tape 100 may contain other components or 0.3 to 1 part by weight of a lubricant, and the lubricant may be at least one selected from the group consisting of fatty acid esters, higher fatty acids, fatty acid amides, and paraffins.

[0035] With the above configuration, the embossed PVC tape 100 has a transparency of 90% to 93% and a haze value of 1.8% to 2%. Preferably, the embossed PVC tape 100 has a transparency of about 91.3% and a haze value of about 1.9%. Thus, the embossed PVC tape 100 has high transparency and low haze value, and is therefore suitable for table mats, window seals, furniture decorations, etc.

[0036] [Measurement of experimental data] Comparing the PVC tapes embossed by different methods with the non-embossed PVC tape, the transparency, haze value, slip property, and maximum static friction coefficient between the first surface and the second surface of the PVC tapes are as shown in Table 1 below. The measurement methods are described below.

[0037] Transparency measurement: The measurement was carried out according to the standard of STM D1003, the PVC tape was hot pressed at 165°C, the thickness of the PVC tape sample was about 2 mm, and the transparency was measured by a spectrometer NDK NDH7000.

[0038] Haze value measurement: The measurement was performed according to the standard of STM D1003. The PVC tape was hot pressed at 165°C, the thickness of the PVC tape sample was about 2 mm, and the haze value was measured by a spectrometer NDK NDH7000.

[0039] Maximum static friction test between first surface and second surface: The maximum static friction coefficient between an embossed surface and a non-embossed surface was measured using a friction meter CFT-400 according to the standard of ASTM D1894.

[0040] Slip property evaluation: In comparing each PVC tape, the embossed surface of the PVC tape with the triangular pyramid embossed pattern and the non-embossed surface were hardly adhered to each other and did not slide relative to each other, so it was rated as 5 minutes. The other PVC tapes were rated from 2 to 4 for slip property.

[0041] [Table 1]

[0042] [Consideration of measurement results] The PVC tape having a triangular pyramid-shaped embossed pattern (i.e., the embossed PVC tape in this embodiment) has a transparency of 91.3%, a haze value of 1.9%, a slipperiness rating of 5, and a maximum static friction coefficient between the first surface and the second surface of 0.76.

[0043] The unembossed PVC tape has a transparency of 91.4%, a haze value of 1.3%, a slip rating of 2, and a maximum static coefficient of friction between the first and second surfaces of 0.94. The unembossed PVC tape with added lubricant has a transparency of 90.8%, a haze value of 2.1%, a slip rating of 3, and a maximum static coefficient of friction between the first and second surfaces of 0.87. The unembossed PVC tape dusted with talc powder has a transparency of 89.7%, a haze value of 4.6%, a slip rating of 4, and a maximum static coefficient of friction between the first and second surfaces of 0.77.

[0044] The PVC tape with linear embossed pattern has a transparency of 90.8%, a haze value of 3.2%, a slip rating of 3, and a maximum static friction coefficient between the first and second surfaces of 0.89. The PVC tape with triangular embossed pattern has a transparency of 91%, a haze value of 3.6%, a slip rating of 4, and a maximum static friction coefficient between the first and second surfaces of 0.84. The PVC tape with hexagonal embossed pattern has a transparency of 91.1%, a haze value of 4.1%, a slip rating of 4, and a maximum static friction coefficient between the first and second surfaces of 0.79.

[0045] It is worth noting that the maximum static friction coefficient between the first surface and the second surface of the PVC tape is preferably about 0.76. If the maximum static friction coefficient between the first surface and the second surface of the PVC tape is too high, different layers of the PVC tape will tend to stick to each other and will be difficult to separate when the PVC tape is wound up. On the other hand, if the maximum static friction coefficient between the first surface and the second surface of the PVC tape is too low, different layers of the PVC tape will tend to slide against each other when the PVC tape is wound up.

[0046] [Advantageous Effects of the Embodiments] As an advantageous effect of the present invention, the embossed PVC tape of the present invention provides a specific slip property without sacrificing print quality due to the technical features that "the embossed pattern includes a plurality of repeating patterns, each of which includes an upper portion of the first surface and a side portion that is recessed into the first surface to surround a cone-shaped space, and has an end point at the apex of the cone-shaped space" and "at least one of the end points is formed per 3,000 square microns of area on the first surface."

[0047] The above disclosure is merely a preferred embodiment of the present invention, and the scope of the claims of the present invention is not limited thereto. Therefore, all equivalent technical modifications made by utilizing the contents of the specification and drawings of the present invention are included in the scope of the claims of the present invention. [Explanation of symbols]

[0048] 100 Embossed PVC Tape 1 Embossed pattern 11 Repeating Patterns 11a First repeat pattern 11b Second repeat pattern 111 Top 112 Side 113 Endpoint A1 First angle A2 Second included angle L Length W width D Depth S1 First Surface S2 Second Surface ∨ Vertical H Horizontal ∪ Embossed PVC tape with or without embossing M embossed mold M1 First repeat bump M2 Second repeat bump

Claims

1. An embossed PVC tape having opposed first and second surfaces, an embossed pattern is formed on the first surface of the embossed PVC tape; The embossed pattern includes a plurality of repeating patterns, each of the repeating patterns includes an upper portion of the first surface and a side portion recessed into the first surface so as to surround a cone-shaped space, and has an end point at a vertex of the cone-shaped space; said first surface being formed with at least one said end point per 3,000 square microns; An embossed PVC tape, characterized in that the maximum static coefficient of friction between said first surface and said second surface is between 0.72 and 0.

78.

2. The embossed PVC tape of claim 1 , wherein each of the pyramidal spaces in the repeating pattern has a triangular pyramid shape.

3. 2. The embossed PVC tape of claim 1, wherein the length of the upper portion in a first direction is 50 to 55 μm, and the length of the upper portion in a second direction perpendicular to the first direction is 58 to 62 μm.

4. The embossed PVC tape of claim 1, wherein the depth from the top to the end point is between 15 μm and 20 μm.

5. 2. The embossed PVC tape of claim 1, wherein the plurality of repeating patterns are divided into a plurality of first repeating patterns and a plurality of second repeating patterns, and the plurality of first repeating patterns and the plurality of second repeating patterns are alternately arranged.

6. 6. The embossed PVC tape of claim 5, wherein a first included angle between each first repeating pattern and any one of the second repeating patterns that line-contacts the first repeating pattern is between 80 degrees and 100 degrees.

7. 6. The embossed PVC tape of claim 5, wherein a second included angle between each first repeating pattern and any one of the second repeating patterns that point contacts the first repeating pattern is between 110 degrees and 130 degrees.

8. 10. The embossed PVC tape of claim 1 comprising a PVC resin, a plasticizer, and a heat stabilizer.

9. 9. The embossed PVC tape according to claim 8, wherein the content of the plasticizer is 20 parts by weight to 40 parts by weight, and the content of the heat stabilizer is 2 parts by weight to 3 parts by weight, based on 100 parts by weight of the PVC resin.

10. 10. The embossed PVC tape of claim 1 having a transparency of 90% to 93% and a haze value of 1.8% to 2%.

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