KR20230123265A - Multipurpose Industrial Adhesive Tape - Google Patents

Abstract

Disclosed is an industrial multipurpose adhesive tape that minimizes curling. The adhesive tape includes: a sheet-shaped substrate having a thin thickness; an adhesive attached to the back side of the substrate; and a protrusion protruding along the longitudinal direction from a part of the surface of the substrate in the width direction.

Description

Industrial multi-purpose adhesive tape {Multipurpose Industrial Adhesive Tape}

The present invention relates to a multi-purpose adhesive tape, and more particularly, to an industrial multi-purpose adhesive tape with minimized curling.

In addition, the present invention relates to multi-purpose adhesive tapes manufactured with different thicknesses, and relates to industrial multi-purpose adhesive tapes that can reduce manufacturing costs by securing sufficient thickness in a small size and have various electrical and mechanical functions.

Recently, electronic devices and information communication devices are greatly affected by heat, static electricity, and electromagnetic waves as they become high frequency, miniaturized, and integrated. For example, a microprocessor or memory as a high-frequency electronic component generates a lot of heat and electromagnetic waves as the processing speed increases, the memory capacity increases and the size decreases, and these high-frequency electronic components, modules, or cables are affected by static electricity and electromagnetic waves around them. Accordingly, in order to prevent electromagnetic waves generated from these high-frequency electronic components, modules, or cables from leaking to the outside and to protect these high-frequency components, modules, or cables from electromagnetic waves generated from the outside, these high-frequency electronic components, modules, or cables By electrically and mechanically connecting components, modules, or cables to the grounding pattern of the printed circuit board or the electrically conductive case with electrically conductive adhesive tape, the high-frequency electronic components, modules, or cables are shielded from electromagnetic waves and grounded. Here, the electrically conductive adhesive tape should have good electrical conductivity in order to improve the electromagnetic wave shielding effect. In particular, the electromagnetic wave shielding effect should be good at a high frequency of 30 MHz or higher required by the US FCC standard, etc. Accordingly, according to the prior art, for example, a product of 3M of the US, the electrically conductive adhesive tape has a thickness of about 0.02 mm to 0.12 mm. Electrically conductive adhesive tapes in which an electrically conductive adhesive is formed on one side of a metal foil or electrically conductive fiber, such as copper or aluminum, have been used. When applied to a flexible printed circuit board or flexible circuit cable, it must have good flexibility and be thin to occupy a narrow space. As such, conventional electrically conductive adhesive tapes have a uniform thickness. There is a disadvantage that it is difficult to use it for various purposes suitable for objects or cables that face it. For example, in the case of using an electrically conductive adhesive tape having good flexibility and a uniformly thin thickness, there is a disadvantage in that it is difficult to reliably contact the opposing devices due to its thin thickness and being located between opposing devices. Conventional adhesive tapes including the adhesive are continuously applied to the backside of a substrate such as a polymer film having a constant thickness that is continuously supplied by being wound around a roller with a relatively large diameter using a coater, and then heat-cured and continuously applied. It is produced by continuously winding on a relatively large roller of another diameter. Afterwards, the long adhesive tape wound around a roller with a relatively large diameter is wound on a paper roll with a relatively small diameter according to the length desired by the customer, and sold to customers. Due to the reason that the adhesive tape is wound on a paper roll having a relatively small diameter as described above, when the adhesive tape is unwound and used, a curling phenomenon occurs to return the adhesive tape to its original wound shape, making it difficult to use the adhesive tape. . This curling phenomenon occurs more often as the diameter of the paper roll is small and the thickness of the substrate is thin. In particular, a metal foil adhesive tape using a metal foil as a base material has a lot of curling due to the restoring force of the metal foil. For this reason, an electrically conductive adhesive tape made of thin metal foil supplied in a conventional roll is cut into When the release sheet is removed after use, the electrically conductive adhesive tape has a disadvantage in that it is inconvenient to use because the electrically conductive adhesive tape is severely curled due to a curling phenomenon that tries to return to its original shape by a roll. In addition, adhesive tapes using thin metal foils that do not use release sheets exhibit severe curling. Furthermore, metal foil adhesive tapes using thin metal foils exhibit severe curling, so that later, metal foil adhesive tapes are used for cables, etc. However, this curling phenomenon does not occur only in electrically conductive adhesive tapes and may also occur in polymer film adhesive tapes using an unstretched polymer film. In addition, such electrically conductive adhesive tapes The thickness is constant, so there is a limit to improving the heat dissipation ability, and it is difficult to use for various purposes. According to another conventional technology, for example, a conductive urethane foam from Seiren in Japan, approximately There is an electrically conductive adhesive tape in which a hole is formed in a urethane sponge having a thickness of 0.5 mm or more, metal is plated, and an electrically conductive adhesive is formed on the back side. However, according to this technology, there is a disadvantage in that the thick electrically conductive adhesive tape is too thick and expensive to be used for a flexible circuit board or flexible circuit cable of a mobile device that requires overall thinness and flexibility. According to another conventional technique, there is a polymer film adhesive tape coated with an acrylic adhesive on the back side of a polymer film such as polyester (PET) that we usually use. However, such a conventional polymer film adhesive tape has a disadvantage in that it is difficult to use for various purposes because the thickness is constant.

Accordingly, an object of the present invention is to provide a multi-purpose adhesive tape having different thicknesses in one body.

Another object of the present invention is to provide multi-purpose adhesive tapes having various shapes at low cost.

According to one aspect of the present invention, a sheet-shaped substrate having a thin thickness; an adhesive attached to the back surface of the substrate; and

Disclosed is a multi-purpose adhesive tape including protrusions protruding along the longitudinal direction from a portion of the surface of the substrate in the width direction.

According to another aspect of the present invention, a sheet-shaped substrate having a thin thickness; an adhesive attached to the back surface of the substrate;

a release sheet adhered to the back surface of the adhesive; and protrusions protruding along the longitudinal direction from a portion of the surface of the substrate in the width direction, wherein the protrusions minimize curling of the substrate when the release sheet is removed.

In addition, according to another aspect of the present invention, a sheet-like substrate having a thin thickness that is supplied by a roll; an adhesive attached to the back surface of the substrate; and protrusions protruding along the longitudinal direction from a portion of the surface of the substrate in the width direction, wherein the protrusions minimize curling of the substrate.

According to the above structure, it is possible to provide adhesive tapes having different thicknesses in one single body.

In addition, it is possible to provide an adhesive tape having various shapes at a low price.

In addition, it is possible to minimize the occurrence of a curling phenomenon even with a thin thickness.

In addition, it is possible to facilitate electrical and mechanical coupling with an object facing an object by the electrically conductive elastomer.

In addition, heat dissipation can be improved.

In addition, it may have elasticity and flexibility at the same time.

In addition, it may have anti-slip and anti-shock effects, etc.

1 is a perspective view showing an industrial multi-purpose adhesive tape according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view illustrating a multipurpose adhesive tape according to an embodiment of the present invention. Referring to FIG. 1, a multipurpose adhesive tape 10 Is, a sheet-shaped substrate 12 having a thin thickness, an adhesive 14 attached to the back surface of the substrate 12, and a plurality of protruding columns in a longitudinal direction from a portion of the surface of the substrate 12 in the width direction It includes a protrusion 18. A release sheet 16 such as a release paper or a release film may be adhered to the back side of the adhesive 14, but it is not essential to construct the adhesive tape 10. According to this configuration, the substrate supplied in a roll ( When 12) is cut to a certain length and used, the curling phenomenon of returning to its original rolled shape can be minimized by the protrusion 18. In other words, the multi-purpose adhesive tape ( The curling phenomenon of 10) can be minimized. In addition, the curling phenomenon is minimized because the region where the projection is formed and the region where it is not formed coexist, and the curling phenomenon can be minimized due to stress generated when the projection 18 is formed on the substrate 12. In particular, the substrate 12 When made of thin metal foil, a lot of curling occurs, and the curling phenomenon can be minimized by these protrusions 18. Here, the size, formation position and number of protrusions 18 on the substrate 12 It is formed to minimize the curling phenomenon. In addition, since the thickness of the adhesive tape 10 increases as much as the height of the protrusion 18 in the portion where the protrusion 18 is formed in the width direction of the base material 12, the resulting As a result, it is possible to configure two parts having different thicknesses on one substrate 12. Therefore, by cutting the boundary between the portion where the protrusion 18 is formed and the portion where it is not formed along the longitudinal direction, it can be effectively used for opposing objects requiring adhesive tapes of different thicknesses. Since the part substantially increases the thickness of the adhesive tape 10, a sufficient thickness can be obtained even if the part made of the substrate 12 and the adhesive 14 is thin. Therefore, the thickness of the adhesive tape 10 itself can be substantially increased while maintaining flexibility without increasing the thickness of the base material 12, so that it can be efficiently used in small-sized electronic devices. The non-formed portion is thin and has good flexibility, and the portion where the protrusion 18 is formed can make elastic contact with the object facing the object. In addition, the protrusion 18 is made of an elastic body, so it has a shock absorbing function for the object in contact. and may also have a non-slip function. However, without being limited thereto, the protrusions 18 may be made of a polymer resin such as polyester (PET). Also, in the case of the portion where the protrusions 18 are formed, it is possible to secure a space between the protrusions 18 so that air can be released. By making the flow smooth, it is possible to rapidly release heat generated from the object in contact with the opposing object. In particular, when the projections 18 are electrically conductive, heat from the substrate 12 can be effectively dissipated through the projections 18. The thickness of the base material 12 may be larger than that of the multipurpose adhesive tape 10. The multipurpose adhesive tape 10 may have electrical conductivity for electromagnetic wave shielding and electrical grounding, and in particular, may have electrical conductivity that conducts electricity vertically, and may also have horizontal Also, for electromagnetic wave elastic electrical grounding, the protrusion 18 may be an electrically conductive elastic body. Preferably, the electrically conductive elastomer is electrically conductive silicone rubber formed by thermally curing liquid electrically conductive silicone rubber. It may have insulating properties. When the base material 12 has electrical conductivity, the base material 12 may be either an electrically conductive fiber or a metal foil, or an electrically conductive film in which a polymer film is formed between upper and lower metal foils. In addition, when the base material 12 has insulating properties, it may be a polymer film such as polyester (PET). Preferably, the thickness of the base material 12 may be 0.02 mm to 0.15 mm. The adhesive 14 is made of urethane, It may be any one of acrylic, epoxy, or silicone rubber adhesive, or may be mixed with metal powder to provide electrical conductivity. Preferably, the adhesive 14 may be formed only on a portion of the back surface of the substrate 12, and the adhesive The thickness of 14 may be 0.01 mm to 0.1 mm. The adhesive 14 is formed on one side of the substrate 12 by equipment and processes for manufacturing conventional adhesive tapes. It can be formed in the shape or pattern of. Referring to FIG. 1 , the protrusions 18 are formed in two lines along the longitudinal direction of the substrate 12 in a hemispherical shape. Although the shape of the protrusion 18 is not limited to a hemispherical shape, it is most likely to be formed in a hemispherical shape because it is preferably formed by curing a liquid polymer or silicone rubber printed on the surface of the substrate 12. Preferably, the projections 18 may be formed by a printing or casting process of liquid polymer resin or silicone rubber. In addition, the projections 18 may be uniformly formed on the entire surface of the substrate 12 while maintaining regular intervals. Preferably, the height of the protrusion 18 may be greater than the thickness of the substrate 12 in consideration of manufacturing cost and efficiency of the product, and more preferably, the height of the protrusion 18 is 0.1 mm to 1.5 mm. Alternatively, as shown in FIG. 3 , instead of the protrusion 18, continuous line-shaped protrusions 19 or zigzag line-shaped protrusions 17 may be formed. Preferably, the protrusions 18 The height may be 0.1 mm to 1.5 mm, and the material of the protrusion 18 may be any one of thermoplastic elastic polymer resin or silicone rubber, or electrically conductive silicone rubber. Considering only the aspects of economy and minimizing the curling phenomenon, It is preferable that the area of the portion where the protrusion 18 is formed on the surface of the substrate 12 is 30% or less of the total area. FIG. 4 is a perspective view showing a multi-purpose adhesive tape representing another embodiment of the present invention. According to the embodiment, a certain portion of the surface of the substrate 12 in the width direction is completely covered with the electrically conductive elastic body 20 such as electrically conductive rubber. Here, the conductive elastic body 20 corresponds to the protrusion 18 of FIG. 1. According to this configuration, the conductive elastic body 20 is formed by cutting the boundary between the portion where the conductive elastic body 20 is formed and the other portion along the longitudinal direction. The portion where 20 is not formed can be used as a flexible electrically conductive tape, and the portion where the electrically conductive elastomer 20 is formed can be used as a thick electrically conductive gasket. That is, the electrically conductive elastomer to be used as an electrically conductive gasket. The area where 20 is formed is located between the opposing mechanical objects and can have elasticity and electrical contact with the opposing mechanical objects. It occupies 30% or less of the total area of (12). In the above embodiment, the substrate 12, the adhesive 14, and the protrusion 18 have been mainly described as being electrically conductive, but the present invention is not limited thereto. Some or all of the substrate 12, the adhesive 14, and the protrusion 18 may be insulators to suit the purpose of the adhesive tape. Although the above description has been centered on the embodiments of the present invention, various changes at the level of those skilled in the art Of course, it is possible to add Therefore, the scope of the present invention cannot be construed as being limited to the above-described embodiments, and should be interpreted by the claims described below.

10: adhesive tape
12: Substrate
14: glue
16: release sheet
17, 18, 19, 20: projection

Claims (1)

a sheet-shaped substrate having a predetermined thickness;
an adhesive attached to the back side of the substrate; and
Including a projection protruding along the longitudinal direction from a portion of the width direction of the surface of the substrate,
The projection is an industrial multi-purpose adhesive tape, characterized in that the electrically conductive elastomer.