JPS59167915A - Laminated sheath cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable using a metal tape laminated with resin as a shielding layer, particularly a cable made of polyvinyl chloride (hereinafter referred to as PVC).
In a laminated sheathed cable with a sheathed outer sheath, a metal tape laminated with a resin that has good adhesion not only to the same metal tape but also to the PVC outer sheath of the outer protective layer is attached vertically or horizontally to the outer periphery of the cable core. Later, it relates to a laminate sheathed cable coated with a PVC protective layer.

The two-laminate resin used in laminated sheathed cables has adhesive properties that allow it to adhere to the metal tape and also to the resin of the outer protective layer, such as PVC, as well as processing characteristics when manufacturing the cable, such as tape molding. Abrasion resistance in equipment, etc. is required. Adhesion between the metal tape and the PVC of the external protective layer '15: This is necessary not only for its moisture-proofing properties (preventing moisture from entering from the outside), but also for the mechanical strength (
This is to improve the sheath's flexibility (flexibility, etc.) and to suppress shrinkage of the sheath using a metal tape (generally made of aluminum). The laminating resin used in laminated cables used to be polyethylene, as seen in British Patent No. 886,417, or its adhesive properties were improved (U.S. Pat. No. 3,233,036, Japanese Patent Publication No. 4.5 -23257, Special Publication No. 52-4027) 72
There's somewhere. However, all of these are based on the consideration of adhesion between the laminate tape and the polyethylene jacket, and PvC has poor adhesion to the jacket7, making it difficult to use highly reliable PV.
It was not possible to obtain a laminate sheathed cable with a C jacket.

The present invention utilizes a combination of laminate materials that provide good adhesion between the metal layer and the protective PVC layer.
It provides a laminated sheathed cable with excellent mechanical properties, specifically a polyolefin (e.g., ethylene-glycidyl acrylate-vinyl acetate terpolymer copolymer, etc.) adhesive layer, a carboxylic acid type polyester, and a polyolefin (e.g., , saponified EVA). FIG. 1 shows a case in which the laminated tape according to the present invention is laminated on one side. FIG. 2 shows a laminate sheathed cable using this laminate tape. In Figures 1 and 2, (1) is a metal tape, (2) is a polyolefin adhesive, (3) is a blend of carboxylic acid type polyester and polyolefin, (4) is a PVC sheath, and (5) is a Cable core shown.

The details of the present invention will be described below with reference to examples.630
, 2 [Laminated tape (6) made by laminating each resin on 1rnl thick soft aluminum using a laminator (
Protective PVC sheet (7) (2,0
(thickness of the fence) by heating and pressing (180°C for 5 minutes, 10 kg/c
m2 gauge pressure) and then cooled to room temperature and its adhesive strength was evaluated. (See Figure 3 for the adhesive force measurement method. However, the tensile speed is 10
0 mm/min/during pull] Omm) The measurement result is the first
As shown in the table, among the resins studied, the carboxylic acid type polyester/polyolefin blend exhibits relatively strong adhesive strength. However, it is still weaker than the adhesive strength with the PE sheet, which is added as comparative data. Examination of the peeling interface revealed that it was between Al=carboxylic acid type polyester/polyolefin blend, and it was found that it was necessary to increase the adhesive strength with the aluminum nap.

Next, based on the above results, in order to further increase the adhesive strength, a layer of yN lyolefin adhesive was applied between the soft aluminum tape and the carboxylic acid type polyester/polyolefin blend (a laminate consisting of the blend).・We investigated a two-layer laminate with an additional layer. The adhesion test method was as described above. The results are shown in Table 2, and EE
It was found that the adhesive strength with PVc was greatly improved for the polyolefins other than A-series, and a laminate tape that firmly adhered to protective PVC and aluminum was obtained.

Example I Based on the above study results, a laminate tape of Aluminum Tape (0.2 mm), Ten Bond First (0.03 m1+), and Ten Carboxylic Acid Type Polyester/Polyolefin (saponified EvA) blend (0.05 mm) was manufactured, and PV
C-covered laminate cable with aluminum and PV
The adhesion strength with the C jacket and the bending characteristics of the cable were evaluated. The results are shown in Table 3. There were no problems with adhesive strength and cable properties (flexibility), and processing properties during cable processing (abrasion resistance during tape molding, etc.)
There was also a problem.

From the above results, we found that a laminate sheathed cable with a PvC jacket using a laminate tape made by laminating a metal tape with a polyolefin adhesive layer and a carboxylic acid type polyester/polyolefin (saponified EVA) blend body layer has a PVC jacket. and aluminum nap adhere firmly,
It was revealed that it exhibits excellent mechanical properties.

Table 1 (4) Bondfast (Sumitomo Chemical Bondfast 7
B) PVC (PVCP for general cable jacket) plastic agent 5
o%) (5) Modified EVA (3) 1 petrochemical atomer) (6) Ethylene-acrylic acid copolymer No.
3 Table (Note) l Measurement of adhesive strength is as per the third prisoner.

2. 180 on a mandrel whose diameter is 12 times the outer diameter of the bending test cable.
Bending the aluminum tape with zero reciprocation as one time is applied, and the number of bends until the aluminum tape cracks is checked.

[Brief explanation of the drawing]

1. Fig. 1 is a cross-sectional view of a single-sided laminated tape used in the laminated sheath cable of the present invention, Fig. 2 is a cross-sectional view of the laminated sheath cable according to the present invention, and Fig. 3 is a cross-sectional view of the laminated tape and the PVC sheet or PVC sheath. It is a figure which shows the adhesive strength test method of. In the figure, (1) is a metal tape, (2) is a polyolefin adhesive, a blend of (tritanyl-ruboxic acid type polyester) and polyolefin, (4) is a PVC sheath, (5) is a cable core,
(6) shows the laminate tape, and (7) shows the PVC sheet. Agent Patent Attorney Tetsu Tsukasa 79

Claims (2)

[Claims] (1) In a laminated sheathed polyvinyl chloride cable that uses a tape with resin laminated on one or both sides of the metal tape as a shielding layer, a polyolefin adhesive is used as the resin laminated to the metal tape on the side that contacts the metal. A laminate sheath cable characterized by using a resin having at least two laminate layers with a blend of carboxylic acid type polyester and polyolefin arranged on the side in contact with the polyvinyl chloride sheath. (2) The laminate sheathed cable according to claim (1), characterized in that saponified EVA is used as the polyolefin blended with the carboxylic acid type polyester.