KR100204247B1 - Manufacturing method of thermal contracibility sleeve for cables connection - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method for manufacturing a heat shrinkable sleeve for connecting a communication cable and an article thereof.

2. The technical problem to be solved by the invention

It is intended to be economical by improving the productivity of the heat shrinkable sheet by making the heat shrinkage by the heat shrink sheet in the sleeve.

3. Summary of Solution to Invention

By extruding carbon black and polymer polymer, 4-13 Megarad of radiation beta (β) cross-linking was stretched in the 7-10 times width direction to obtain a heat-shrinkable sheet in a rolled state, and the heat-shrinkable sheet thus obtained can be referred to as a reinforcing material. The sleeve was formed by integrally adhering to the outside of the woven fabric, and the heat-shrinkable sheet itself was heat-shrinkable when the heat was applied during construction, and the sheet was able to increase the productivity of 30-50 m / min.

4. Main uses of the invention

For sealing communication cable connection

Description

Manufacturing method of heat-shrinkable sleeve for communication cable connection

1 is a partially enlarged cross-sectional view of a heat shrinkable sleeve showing an embodiment of the present invention.

2 to 5 are enlarged cross-sectional views of a heat shrinkable sleeve showing another embodiment of the present invention, showing a state suitable for each use.

* Explanation of symbols for main parts of the drawings

1: Sleeve 2: Heat Shrink Sheet

3: high polymer polymer (adhesive) 4: woven fabric

5: Aluminum thin plate (for external radio wave blocking) 6: Heat seal insect (for low temperature adhesion)

The present invention relates to a method for manufacturing a heat shrinkable sleeve for a communication cable connection connection used for sealing to protect a communication cable connection portion and the article.

In general, in connecting a communication cable, a separate sleeve is used to seal the connection part. The sleeve is configured to seal the outside of the cable connection part by shrinking and deforming itself when heat is applied.

On the other hand, the sleeve is basically composed of a woven fabric made of a mesh-like synthetic fiber between the sheet material. In connecting the communication cable, the sleeve shrinks when heat is applied to the outer surface of the cable connection. It is meant to be built.

On the other hand, according to the product and the manufacturing method of the dimensional restoration that is disclosed in Korean Patent Publication No. 90-6685, the fabric itself is configured to restore and shrink the sleeve itself by the mesh-shaped weave sandwiched between the two sheets The high-molecular polyethylene or medium-density polyethylene, which is a silver polymer, is thermally melted by single or mixing, and then extruded into a thin solid line of 1-3m / m in diameter by an extruder, and stretched by 5-7 times after road slubbing crosslinking. When the heat-shrinkable fiber and glass fiber cross-weaved and cross-weaved with the weft and the slope are cross-woven between the sheets, the heat-shrinkable woven body itself is restored and contracted. Shrinkage deformation to seal the cable connection.

In such a structure, since the radiation cross-linking facility is very expensive, the economical efficiency is lowered, and the sheet is also contracted as the woven fabric shrinks, so that the surface is uneven after the construction is not smooth and the contraction time is long.

In addition, the heat shrinkable sleeve for connection of pipes and cables disclosed in Korean Patent Publication No. 93-10051 is a polyamide which is a synthetic fiber between a double heat shrinkable sheet material having heat shrinkability which is stretched in a predetermined direction by chemically crosslinking a polymer polymer or A woven fabric made of polypropylene or polyester is inserted and a polymer polymer is fused to the outer both sides of the heat shrinkable sheet material to form a sleeve. When the heat is applied, the stretched heat shrinkable sheet itself contracts heat recovery.

On the other hand, in the above two types of ribs, the sheet has a low productivity of about 1-5 m / min and the external heat is generated when the heat shrinks in the construction (the former is the heat shrinkable woven material, the latter is the heat shrinkable sheet material). Heat shrinkage is only achieved when it is delivered, which means that the factor of cost increase due to productivity decrease is mainly due to external communication during the construction of telecommunications.Therefore, the heat shrinkage effect varies depending on the weather in the summer and winter. After the surface was not smooth, it was not good.

The present invention proposes a method of manufacturing a sleeve for a connection connection of a communication cable and the article in consideration of the conventional problems as described above, according to the present invention, the heat shrinkable sheet to improve the productivity of 30-50m / min to reduce the cost It is intended to provide a sleeve so that the surface of the sleeve after the construction to be smooth at the same time. First, the manufacturing method will be described in detail according to each process as follows.

(Step 1)

After mixing the appropriate amount of carbon black and polymer in the extruder, extrude it to a predetermined thickness and make it into a roll state, and then radiation-beta (β) cross-linking to 4-13 megarad (Megarads) sheet. To shape.

(2nd step)

The radiation beta (β) crosslinked 4-13 megarad polymer polymerization sheet was stretched in the 7-10-fold width direction to make it into a roll state again.

(3rd step)

The cross-linked and stretched rolled polymeric polymeric sheet and the woven fabric of polyester fiber or glass fiber are thermally extruded and bonded with a polymeric polymer, and then the bursting strength is increased.

(4th step)

Radiation-crosslinked rolls are bonded to both surfaces of the woven surface mixed with the polyester fiber or the glass fiber obtained in the above-mentioned third step by heat-melting with a polymer polymer in the same manner, so that the sheets actually forming the heat shrink layer become upper and lower layers. To obtain a sheet-shaped sleeve.

On the other hand, in the sleeve obtained in the fourth step according to the use of the product, the aluminum sheet in the rolled state is bonded by an extruder to the lower sheet of the sheet which is integrally bonded with the woven material, or a heat seal is applied to the lower surface of the aluminum sheet. (Heat seal) is coated to obtain a sleeve in a state suitable for the connection of each cable.

1 is a heat-shrinkable sheet 2 integrally attached to both surfaces of the woven fabric 4 with the polymer polymer (adhesive) 3 as a medium on the outer shaft of the woven fabric 4, and the lower sheet 2 is heat-sealed to the side. A sleeve (1) having a layer (6) is shown and a double-sided heat shrink sleeve for communication cable connection is shown, and the sleeve (1) of FIG. 2 has an aluminum sheet (5) on the lower sheet (2) side. And the heat seal layer 6 are attached to each other in order to show the structure of the sleeve 1 suitable for external radio wave blocking.

3 shows the woven fabric 4 integrally attached to the lower end of the heat-shrinkable sheet 2 and the aluminum foil 5 and the heat seal layer 6 are sequentially attached to the lower woven fabric 4 to prevent cross-sectional rupture and The structure of the heat shrinkable sleeve 1 suitable for external radio wave blocking is shown, and FIG. 4 shows the heat shrinkable sleeve 1 in a state suitable for preventing cross-sectional tearing, and FIG. 5 shows the heat shrinkable sleeve 1 of the cross section of a communication cable. The sleeve of the structure suitable for is shown.

Table 1 compares the sheet in the sleeve for communication cable connection and connection, which is a feature of the present invention, and the sheet manufacturing method of the sleeve described in the prior art.

The physical property test of the heat shrinking sleeve 1 for communication cable connection connection manufactured by the above method was carried out.

This was a test of the double-sided heat shrink sheet 2 having the configuration as shown in FIG. 1, the heat shrink sheet 1 was stretched at a radiation beta (β) crosslinking and about 800%, and the woven fabric 4 was resistant to heat resistance. In order to prevent shrinkage during heat shrinkage, a sample in which a polyester fiber having a width of 46 lines and a length of 8 lines per inch is placed in the inner intermediate layer of the heat shrink sheet 2 and heat-bonded with a polymer polymer 3. Was used, and the results as shown in Table 2 were obtained.

As described above, the products according to the present invention had a significantly better shrinkage at the same temperature than the conventional products thermally contracted by the intermediate layer of the multi-layered sleeve, and the surface appearance was smooth even after thermal contraction.

Therefore, when manufacturing a heat shrinkable sleeve for communication cable connection connection based on the heat shrinkable sheet, which is a feature of the present invention, the productivity is excellent and the manufacturing cost can be reduced, thereby increasing the competitiveness.

Claims (6)

In manufacturing a sleeve that is enclosed and sealed on the outside of a communication cable connection part, an appropriate amount of carbon black and a polymer are mixed in an extruder, extruded to a predetermined thickness, and made into a roll state, followed by radiation beta (β) crosslinking. A first step of megarading to form a sheet shape, a second step of stretching the polymer polymerization sheet of the first step in the width direction 7-10 times in a rolled state, a polymer polymerization sheet in a rolled state of radiocrosslinking and The third step of adhering the woven fabric mixed with polyester fiber or glass fiber with a polymer polymer and then increasing the bursting strength; A heat shrinkable slab for connection of a communication cable, comprising a fourth process of melting and bonding the heat shrink layer to be an upper layer and a lower layer. Rib manufacturing method. The method of manufacturing a heat shrinkable sleeve for communication cable connection connection according to claim 1, wherein the heat seal layer is coated on a lower part of the sheet positioned at the lower part of the sheet formed by the first to fourth processes. The method of manufacturing a heat shrinkable sleeve for connecting a communication cable according to claim 1, further comprising a coating step of sequentially attaching an aluminum thin plate to a lower surface of the heat shrinkable sheet positioned below and coating a heat seal layer. In the sleeve 1 for communication cable connection connection in which the sheet 2 is integrally bonded to both surfaces of the woven fabric 4, the sheet 2 is crosslinked and elongated with radiation beta β, and when the heat is applied, 2) A heat shrinkable sleeve for connecting a communication cable, characterized in that the sleeve (1) itself is deformed to seal the outer surface of the communication portion of the communication cable as the heat shrinks itself. The heat shrinkable sleeve as claimed in claim 4, wherein the sheet (2) is composed of carbon black and a polymer. The heat shrinkable sleeve as claimed in claim 4, wherein the sheet (2) is stretched 7 to 10 times in the width direction.