KR20010079401A - The tape of shielding electromagnetic wave - Google Patents

Abstract

PURPOSE: An electromagnetic wave shielding tape is provided to achieve an improved productivity by automating the procedure of stripping off the conductive metal tape from the shielding tape and attaching the metal tape to electronic products. CONSTITUTION: An electromagnetic wave shielding tape is characterized in that a silicon treated stripping layer(2) is deposited onto a synthetic resin film(1), and the silicon treated stripping layer and a conductive metal tape(3) which is cut into a predetermined size by a Tomson cutting are adhered by a conductive adhesive layer(4). As the synthetic resin film, PET(polyethylene terephthalate) film, polypropylene film, poly amide film, unplasticized PVC film or high density polyethylene film is used. As a metal tape, thin film sheet like aluminum or copper, or other conductive metallic thin film sheet is used.

Description

Electromagnetic shielding tape {THE TAPE OF SHIELDING ELECTROMAGNETIC WAVE}

The present invention relates to a conductive tape for shielding electromagnetic waves, and more particularly, to a conductive tape for shielding electromagnetic waves used for the purpose of shielding and grounding and impact protection of electromagnetic waves harmful to a human body during the manufacture and assembly of electronic products. The present invention relates to an electromagnetic shielding tape having a regular and continuously adhered metal foil tape having a predetermined size on a release treated PET (polyethylene terephthalate) film.

However, the electromagnetic wave shielding tape used in the manufacture and assembly of conventional electronic products is a conductive metal such as aluminum or copper (copper) on a release paper coated with a solution-type synthetic resin on paper or laminated a thin film of synthetic resin and then siliconized thereon. Laminated sheets coated with conductive adhesive on one side of the thin film sheet were made by Tomson cutting, leaving only a certain size of metal tape on the release paper, and only a certain size of metal tape on a release paper where unnecessary scrap was removed. This bonded electromagnetic shielding tape can be referred to, and such a tape is wound and commercialized in a rolled state.

The above tape is mainly used for electromagnetic shielding of LCD (liquid crystal glass screen) or grounding of HDD (computer storage device). Since the existing electromagnetic shielding tape is almost impossible for continuous operation, the conductive metal tape is removed from the release paper. Peel off one by one and attach it manually to the edge or edge of LCD screen or computer storage device.

For this reason, the automatic tape attaching machine, that is, the aluminum tape automatic extractor is operated correctly by the sensor by the light. Therefore, the electromagnetic wave tape is composed of opaque release paper made of paper, so that the light does not pass well. It is almost impossible to automate due to the inaccurate peeling and adhesion to the product.

In order to remove the conductive metal tape from the conventional electromagnetic shielding tape and to attach it to the product smoothly, a specially manufactured and expensive automated device must be used, which also occurs when the surface of the release paper is peeled off from the release paper. Frequently, dust generated during tomson cutting (fiber particles generated by cutting fiber powder by cutting of release paper) generates a problem that may contaminate electronic products (LED, HDD) requiring high cleanliness.

In addition, the last release paper that is left after the conductive metal tape (aluminum or copper tape) is peeled off and adhered to the product can be recycled as waste by coating a synthetic resin solution on paper or laminating a thin film of synthetic resin and then treating it with a silicone as a release agent. There is also a problem with the disposal as it remains as waste.

The present invention aims to provide an electromagnetic shielding tape which solves the problems of the electromagnetic shielding tape based on a conventional release paper, and releases a synthetic resin film, especially a PET film, to bond a metal thin film of aluminum or copper material thereon, tomson. By cutting the electromagnetic shielding tape by cutting the electromagnetic shielding tape from the electromagnetic shielding tape, it is possible to greatly improve productivity by automating the work of attaching the conductive metal tape to the electronic product. Unlike the conventional shielding tape based on the release paper, In the case of metal tape peeling, it is possible to prevent the phenomenon of biting the release surface together when peeling off the metal tape, and to prevent the generation of dust (powder of paper fiber) generated during tomson cutting. PE can be prevented and finally left It is an object of the present invention to provide an electromagnetic shielding tape that can recycle T film.

1 is a perspective view of a state in which the electromagnetic shielding tape is wound around a roller according to the present invention.

The electromagnetic wave shielding tape according to the present invention solves the problem of the electromagnetic wave shielding tape based on a conventional release paper, which is a metal thin film such as aluminum, copper, etc. on a release film treated with silicone release by a laminating method on a synthetic resin film, especially a PET film. A sheet of conductive adhesive is coated on one side of the sheet, and a metal thin sheet is laminated using an adhesive coating as a medium to be cut by tomson cutting. Then, scrap of metal tape is removed and wound into a roll. Only a conductive metal tape of a certain standard is coated on a polyester release film. It can be called the electromagnetic shielding tape left.

As shown in FIG. 1, the electromagnetic shielding tape manufactured as described above has a silicon release layer 2 formed on the synthetic resin film 1, and the conductive film is cut by tomson cutting to a certain standard with the silicon release layer 2. It can be said that the electromagnetic wave shielding tape (A) bonded between the metal tapes 3 by the conductive adhesive layer (4).

In FIG. 1, reference numeral 5 denotes a roller.

As the synthetic resin film above, PET (polyethylene terephthalate) film, polypropylene resin, polyamide film, rigid PVC film, high-density polyethylene film, etc. can be used, but most preferably, PET film, metal tape The thin film sheet, such as aluminum, copper, and other conductive metal thin film sheets can be used.

The conductive adhesive 4 is an adhesive obtained by adding a conductive metal powder (powder such as aluminum, copper or silver) to a general adhesive.

The electromagnetic wave shielding tape according to the present invention has excellent smoothness of the release surface compared to the electromagnetic wave shielding tape based on the conventional release paper, so that when the metal tape is peeled off from the electromagnetic shielding tape, the peeling is smooth and the ground is transparent. It is made of synthetic resin film, especially transparent PET film, so that it can meet the automation equipment operated by peeling of conductive metal tape from electromagnetic shielding tape and sensing of light attached to electronic products. In addition, since the base material is made of synthetic resin, the dust of fiber powder generated when manufacturing the electromagnetic wave shielding tape based on the conventional release paper in the Tomson cutting process during the manufacturing of this product, and the release surface when peeling the conductive metal tape from the conventional electromagnetic shielding tape. Source of the phenomenon of biting It can be prevented.

Incidentally, the present invention is a direct release treatment on a synthetic resin film, but conventionally has the advantage of reducing the process by laminating with synthetic resin melt or thin film synthetic resin on paper and then performing a silicone release treatment on it, and the metal from the electromagnetic shielding tape After peeling off the tape layer and finally attached to the electronic product, the PET film can be easily recycled, which is also an advantage of the present invention.

The electromagnetic wave shielding tape based on the synthetic resin film, especially the PET film, according to the present invention is made to be suitable for an automated dispenser attached to a liquid crystal glass screen or a computer memory device by peeling the conductive metal tape therefrom, thereby maximizing the workability. In addition, compared with the electromagnetic wave shielding tape based on the conventional paper release paper, the effect as shown in Table (1) can be obtained.

Table (1) Comparison table of electromagnetic shielding tape based on electromagnetic shielding tape and conventional paper release paper according to the present invention

Use paper release paper PET Release Film Thomson Cutting Surface It tends to cut off the film side of the release paper Only conductive tape is cut with single structure of release film Optical sensor operation of automation equipment Generally, the sensor that detects an object uses light, but it is difficult to accurately detect it because the part of the paper release paper does not transmit light. Transparency of the release film makes it easy to operate the optical sensor for accurate position detection Use in clean room The film part of the release paper is cut off, and the paper part of the release paper is torn off, and a lot of dust is generated when peeling off the tape, making it impossible to use in a clean room. It can be used regardless of clean room by using polyester film of polyester series of release film. thickness The thickness of the release paper is thick as it is used at least 80㎛ The thickness can be made thin by using the minimum 38㎛ ~ 75㎛ Application of electronic products Due to the nature of paper release paper, it is often used for hand work. Due to the unique peeling phenomenon due to film releasing, it is possible to perform both manual and automated tasks. Generation of static electricity Constant voltage occurs when peeling tape No static electricity generated by anti static treatment Eco-friendliness Classified as environmental waste during incineration of release paper The use of FDA approved PET makes no dioxin and it is classified as eco-friendly product and can be recycled.

Claims (2)

A silicon release layer (2) is formed on the synthetic resin film (1), and electromagnetic shielding is adhered with a conductive adhesive between the silicon release layer (2) and the conductive metal tape (3) cut by Tomson cutting to a certain standard. Tape. The electromagnetic wave shielding tape according to claim 1, wherein the synthetic resin film (1) is a PET film, a polyfluoropyrene film, a polyamide film, a rigid PVC film, or a high density polyethylene film.