KR960007186B1 - Base for tape - Google Patents

Abstract

The new conductive base matrix for tacky tape consist of the net fabrics which is combined with cotton and synthetic fiber for warp and weft thread, and conductive fine denier made by aluminium, iron or carbon fiber. The tacky tape is prepared by forming the tacky layer and thermoplastic resin layer on this conductive base matrix. This tacky tape can dissipate the internal electrostatic in brown tube of TV by contacting the conductive ceramic coating material of brown tube surface.

Description

Base material for tape

TECHNICAL FIELD This invention relates to the base material for tapes which has an electrical conductivity.

Specifically, it relates to a base for conductive tape that can be used as a base for adhesive tapes.

The base material for a tape of the present invention is an adhesive tape used to fix a Braun tube used for an imaging device such as a television in a thermal shrinkage type using an iron explosion-proof band. It can be very usefully used as a substrate.

In general, the CRT is made of glass and the inside is vacuum, so it can be easily broken by external shocks. Therefore, the Explosion-proof band made of metal cannot be fixed directly to the housing or casing. To the casing or housing.

In this way, by fixing the explosion-proof band to the CRT by using a buffer adhesive tape, it is possible to prevent breakage of the CRT and to minimize the scattering of fragments even when the CRT explodes due to an external impact or accident.

SUMMARY OF THE INVENTION An object of the present invention is to provide a conductive tape base material which is required for the manufacture of a conductive adhesive or adhesive tape which is used for preventing the accumulation of static electricity in a CRT and the substrate itself of the tape.

CRTs used in video equipment such as televisions have to be subjected to extremely high voltages due to the way they are formed. As a result, static electricity is generated in the outer edge portion, and if the generated static electricity cannot be removed, it causes the accumulation of static electricity.

As the use of CRTs expands, the opportunities for users to touch or touch them are increasing. The accumulation of static electricity has a detrimental effect on the function of CRT as well as the human body. Excessive contact with static electricity can result in unpleasant feelings caused by energization, as well as cause various diseases. .

In order to prevent the accumulation of static electricity, various methods have been attempted at present, but due to structural constraints such as television, many restrictions are placed on the static electricity control method.

Currently, the commonly used method is to cut a pressure-sensitive adhesive tape coated with a conductive material such as graphite to aluminum foil or copper foil to an arbitrary length, attach it to the outer edge of the CRT at equal intervals, and then attach an explosion-proof band thereon. By allowing electricity to flow through each other, static electricity is discharged through an "earth circuit" through the explosion-proof band and against the cabinet.

In particular, CRTs (Color Display Tubes), which require high-definition, high-definition images such as computer monitors, large color televisions, and high-definition televisions (HDTVs), are designed to block the emitted electromagnetic waves and to remove accumulated static electricity. A method of forming a conductive ceramic coating layer by coating with a conductive ceramic is also used.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tape base material useful for producing a conductive adhesive or adhesive tape that can be used for preventing the accumulation of static electricity by making the base material of the tape itself conductive.

In general, glass fiber mesh cloth is used as the adhesive tape for adhesive tape for CRT, but tensile strength is strong, but there is no adhesiveness with thermoplastic resin layer such as polyethylene on one side of FRP. You need to do some extra processing to improve it.

In the present invention, in the conductive adhesive tape, the portion where the tensile strength of the mesh cloth (warp) is a combination of glass fiber and the conductive fine yarn, but the portion where the tensile strength is relatively low (weft) ) Is to provide a new conductive adhesive tape substrate which is composed of a cotton yarn or a mixture of cotton and synthetic fibers such as polyester to improve the adhesion of the adhesive tape substrate and the thermoplastic synthetic resin layer such as polyethylene.

In this way, if the fiberglass and cotton fibers or a blend of glass fibers and cotton and polyester fibers to form a mesh cloth as the base of the adhesive tape can improve the adhesive strength with the thermoplastic synthetic resin layer, there is an advantage in terms of manufacturing cost.

In the adhesive tape of the present invention, the conductive fine yarn, which is fused with glass fiber, is in close contact with the conductive ceramic coating layer on the surface of the CRT in the course of the work to form a conductive contact, thereby easily discharging the internal static electricity and preventing the accumulation of static electricity in the CRT. Can be.

In addition, cotton yarn or blended yarn of cotton and synthetic fiber is easy to be flame retardant, so the flame retardant treatment is used to construct the net cloth. When the adhesive tape is adhered to Braun tube by using the explosion-proof band, it can withstand high heat. It was possible to maintain the same strength as used.

Hereinafter, an embodiment of the present invention will be described.

Example 1

In the production of mesh cloth using warp yarn as glass fiber and weft yarn as cotton yarn or cotton and polyester mixed yarn, one or more warp yarns or weft yarns of 25 to 75 µm thick It was.

The pressure-sensitive adhesive tape was prepared by forming a pressure-sensitive adhesive layer and a thermoplastic synthetic resin layer on a substrate for pressure-sensitive adhesive tape prepared in this manner.

The adhesive tape was wound on a CRT tube and an explosion-proof band heated to 380-450 ° C. was placed thereon.

As the explosion-proof band is cooled and contracted, the thermoplastic resin layer and the pressure-sensitive adhesive layer are melted together, and the adhesive tape is fused together, and these warp and weft yarns are mixed between the tissues to cause compression together with the substrate.

At this time, as the network of the substrate is in close contact with the explosion-proof band, the conductive thin wire located only in the warp yarn (tilt) forms a partial contact with the explosion-proof band, and through this contact, static electricity in the outer edge of the CRT flows out into the explosion-proof band. This can eliminate static electricity accumulation on the outer edge of the CRT. As a result of measuring the electrical resistance value of the adhesive tape, it was 4.7 × 10 ^-3 ~ 6.8 × 10 ^-3Ω Ωm, and the electrostatic integration of the finished product was satisfactory.

When the tape base material of the present invention is used, the manufacturing cost is lower than that of the conventional method, and the CRT can be protected safely while also preventing the electrostatic accumulation of the outer edge of the CRT.

As such, the method of eliminating static electricity accumulated on the outer surface of the CRT using a fibrous conductive material fused with glass fiber or cotton yarn or blended yarn has a much greater protection effect than the method of removing static electricity using conductive metal particles. There is also a side effect of increasing the strength of the base material by weaving the fiber woven fabric with metal fine wire.

In this case, in order to impart conductivity to the glass fiber, a glass fiber having a conductive material layer may be used on the surface of the conductive material made of a metal powder such as graphite, copper or iron.

In addition, since the fibrous conductive fine wires are spliced only on the warp yarns, there is an advantage that the conductive contacts between the CRT and the explosion-proof band can be uniformly dispersed in a desired number range.

Claims (4)

A base material for conductive tapes, wherein the base material is composed of glass fibers and cotton yarns as weft and warp yarns, and the conductive fine wires are fused together to form a mesh cloth. The base for conductive tape according to claim 1, wherein the cotton yarn is a blended yarn of cotton and synthetic fibers. The base material for conductive tapes of Claim 1 whose fine conductive wire is aluminum, iron, or carbon fiber. The base material for conductive tapes of Claim 1 whose glass fiber is the glass fiber which apply | coated the conductive material.