JP3407665B2 - Intermediate polyvinyl chloride resin composition and electric wires and cables using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyvinyl chloride resin composition used for molding an interposition of an electric wire / cable, and an electric wire / cable having an interposition molded using the same.

The present invention particularly relates to a polyvinyl chloride resin composition used for forming an interposition of an electric wire / cable having an insulating core wire having a polyvinyl chloride resin insulator and a polyvinyl chloride resin sheath, and the same. The present invention relates to an electric wire / cable having a polyvinyl chloride resin-based insulator and a sheath, which have a molded interposition.

[0003]

2. Description of the Related Art When a polyvinyl chloride resin composition for interposing electric wires / cables, which has been introduced in the past, is used, the polyvinyl chloride-based insulator of the core and the interposition adhere to each other when the electric wires / cables are molded. And it becomes impossible or difficult to separate each other when processing the ends of electric wires and cables.
In general, it was not possible to obtain electric wires / cables with good workability.

As a method for improving the workability at the end processing as described above, a method of adding a foaming agent, a filler or an incompatible material to the intervening polyvinyl chloride resin composition has been proposed. However, the improvement of the peelability between the core insulator and the interposition was insufficient in general, and it was not possible to adopt it from the viewpoint of cost, etc., so that the problem could not be solved: (1) Polyvinyl chloride for interposition Even if an attempt is made to blend a resin composition with a foaming agent to obtain inclusions forcedly foamed by the foaming agent, the amount of the plasticizer must be increased to 50% by weight of the whole for uniform foaming. Further, when the resin content is around 50% by weight, the tackiness increases and the peelability deteriorates.

(2) Even if calcium carbonate or the like is added to the intervening polybutynyl chloride resin composition and an attempt is made to solve the problem by using these fillers, if the amount of the filler is increased and the filling amount is increased, a molded product is obtained. If the amount of plasticizer is increased in order to avoid the increase in hardness and brittleness, the tackiness increases and the releasability deteriorates.

(3) Even if a polyethylene resin or the like is added to the intervening polybutynyl chloride resin composition to try to improve the releasability due to its incompatibility, the polyethylene or the like is not uniformly mixed during kneading. The improvement of the overall peelability is not ensured, and the polyethylene resin or the like is expensive, so that it cannot be adopted in terms of the cost required for the interposition.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to a molding composition for interposing electric wires / cables, which is a polyvinyl chloride resin composition highly filled with a filler, and an interposition molded using the same. The purpose is to provide an electric wire / cable.

Another object of the present invention is to provide a polyvinyl chloride resin composition for interposition molding which provides good interposition with peeling property from a polyvinyl chloride resin-based core insulation during terminal processing, and molding using the same. An object of the present invention is to provide an electric wire / cable having an interposition with good peelability from the core insulation.

Still another object of the present invention is to provide an electric wire
(EN) Provided are a polyvinyl chloride resin composition which is highly filled with a filler used for molding a cable interposition and spontaneously foams during molding, and an electric wire / cable having the interposition molded using the same.

[0010]

Means for Solving the Problems Polychlorination for interposition of the present invention
The vinyl resin composition includes a polyvinyl chloride resin, a plasticizer, and
A resin composition containing a fixed agent and a lubricant is included as a filler.
Hydrosilicic acid-containing calcium carbonate, hydrous silicic acid and calciu
An electric wire that contains a certain amount of mu-substituted A-type zeolite.
A polyvinyl chloride resin composition for interposing a cable.

[0011]

Further, the electric wire / cable of the present invention comprises a resin composition containing a polyvinyl chloride resin, a plasticizer, a stabilizer and a lubricant, and a hydrous silicic acid-containing calcium carbonate as a filler, a hydrous silicic acid and a calcium-substituted A. Tokoro type zeolite
A wire cable having an intervening molded with a polyvinyl chloride resin composition comprising allowed quantitative content.

The hydrous silicic acid (hydrous silica) -containing calcium carbonate used as one of the fillers in the present invention is
It is preferable that the content of silica is 2% or more, which is the main component of the interposing filler. The addition amount is 250 to 300 with respect to 100 parts by weight of the polyvinyl chloride resin.
It is preferable to use parts by weight. If the amount added is less than the lower limit, the effect of sufficiently improving peelability cannot be obtained, and if the amount added is more than the upper limit, it becomes difficult to form the interposition.

The hydrous silicic acid (hydrous silica) used as one of the fillers in the present invention functions synergistically with other fillers in order to improve the release agent between the interposition and the core insulator (etc.). It is a compounding agent. The amount of addition is preferably 5 to 20 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin. If the amount added is below the lower limit, the effect of improving releasability will be inadequate, and if the amount added is above the upper limit, the effect will saturate, and eventually molding of the interposition will become difficult.

The calcium-substituted A-type zeolite used as one of the fillers in the present invention is used for improving the peeling property between the interposition and the core insulator (etc.), and its peeling property improving effect. Is synergistically enhanced by the coexistence of hydrous silicic acid and the like. The calcium-substituted A-type zeolite according to the present invention has a form of regular hexahedral crystal particles, and has functions such as adsorption ability, trapping ability and exchange ability based on the zeolite crystal structure. Preferred as the calcium-substituted A-type zeolite is a synthetic calcium-substituted A-type zeolite, which is a high-purity one having a very small content of residual alkali, iron ions, alkali ions and clay-based inorganic substances. It is in the form of regular hexahedral crystal grains with rounded corners, and such a calcium-substituted A-type zeolite is a special calcium-substituted synthetic zeolite CS-100 (provided by Kosei Co., Ltd .: Composition formula: C
aO.Al ₂ O ₃ .2SiO ₂ .4.5H ₂ O). The addition amount is preferably 1 to 8 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin. If the amount added is less than the lower limit, a sufficient peeling effect cannot be obtained, and if the amount added is more than the upper limit, the effect saturates, and finally molding of the interposition becomes difficult. The effect of improving the releasability is to reduce the adhesive surface due to the shape of regular hexahedral crystal grains, and to take in the adhesive component due to the three-dimensional network structure or balloon (fusen) structure,
Furthermore, it is considered that these effects are brought about by the synergistic effect with hydrous silicic acid and the like.

The polyvinyl chloride resin used in the present invention preferably has an average degree of polymerization of 700 to 2000.

As the plasticizer used in the present invention, a general plasticizer in the interposition molding of electric wires / cables can be used, but a phthalate ester-based plasticizer is preferable, for example, dioctyl phthalate. The blending amount thereof is preferably 50 to 90 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin.

As the stabilizer used in the present invention, a general stabilizer in the interposition molding of electric wires and cables can be used, but a lead (Pb) -based stabilizer (for example, tribase), calcium-zinc (Ca / Zn). ) System stabilizers are preferred. The compounding amount thereof is preferably 2 to 7 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin.

The lubricant used in the present invention includes electric wires and
Although a general lubricant for interposing a cable can be used, it is preferable to use a fatty acid metal salt (metal soap) lubricant or an ethylene wax lubricant. Examples of the fatty acid metal salt (metal soap) include barium stearate, lead stearate, calcium stearate, zinc stearate, dibasic lead stearate, and other stearic acid metal salts (metal soap). This is a suitable example. The compounding amount of the lubricant is preferably 2 to 7 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION A polyvinyl chloride resin composition for interposition of the present invention, a group of which is embodied, is a resin composition containing a polyvinyl chloride resin, a plasticizer, a stabilizer and a lubricant. , 100 parts by weight of polyvinyl chloride resin,
250 to 300 parts by weight of hydrous silicic acid-containing calcium carbonate, 5 to 20 parts by weight of hydrous silicic acid, and calcium substitution A
A polyvinyl chloride resin composition for interposing electric wires and cables, which comprises 1 to 8 parts by weight of type zeolite.

Further, the intervening polyvinyl chloride resin composition of the present invention, which is a more concrete group, contains 50 to 100 parts by weight of the polyvinyl chloride resin and 50 to 50 parts by weight of a phthalate ester plasticizer. 90 parts by weight of lead (Pb) -based stabilizer or calcium-zinc (Ca / Zn) -based stabilizer 2
-7 parts by weight, fatty acid metal salt lubricant or ethylene wax lubricant 2-7 parts by weight, hydrous silicic acid-containing calcium carbonate 250-300 parts by weight, hydrous silicic acid 5-20 parts by weight, calcium-substituted A-type zeolite 1 to 8 parts by weight of a polyvinyl chloride resin composition for interposing electric wires and cables.

The electric wires / cables of the present invention, a group of which is embodied, include a resin composition containing a polyvinyl chloride resin, a plasticizer, a stabilizer and a lubricant, and 100 parts by weight of the polyvinyl chloride resin. On the other hand, a molding polyvinyl chloride resin composition comprising 250 to 300 parts by weight of hydrous silicic acid-containing calcium carbonate, 5 to 20 parts by weight of hydrous silicic acid, and 1 to 8 parts by weight of calcium-substituted A-type zeolite. It is an electric wire / cable having an interposition formed by using it.

Further, the electric wire / cable of the present invention,
A further concrete group is a phthalate ester-based plasticizer of 5 parts by weight per 100 parts by weight of polyvinyl chloride resin.
0 to 90 parts by weight, 2 to 7 parts by weight of lead (Pb) stabilizer or calcium-zinc (Ca / Zn) stabilizer, 2 to 7 parts of fatty acid metal salt lubricant or ethylene wax lubricant.
% By weight, hydrous silicic acid-containing calcium carbonate 250 to 30
An electric wire / cable having an interposition formed by using a polyvinyl chloride resin composition for molding containing 0 part by weight, 5 to 20 parts by weight of hydrous silicic acid, and 1 to 8 parts by weight of calcium-substituted A-type zeolite.

[0024]

EXAMPLES Specific examples of the present invention will be described below together with comparative examples.

Table 1 shows the composition components of the intervening polyvinyl chloride resin composition of the present invention (parts by weight of each component relative to 100 parts by weight of the polyvinyl chloride resin) and the resulting polyvinyl chloride resin composition. The result data of a peeling test performed on a polyvinyl chloride resin-based electric wire / cable molded for molding is shown below.

Table 2 is a continuation of Table 1 except that the composition components of the intervening polyvinyl chloride resin composition for comparison and the obtained polyvinyl chloride resin composition were used for molding the intervening substance. Shows the result data of a peeling test performed on a general polyvinyl chloride resin-based electric wire / cable molded in the same manner as in the example of Table 1.

[0027]

[Table 1]

[0028]

[Table 2]

(1) Preparation of intervening polyvinyl chloride resin composition At the compounding ratios shown in Tables 1 and 2 (parts by weight relative to 100 parts by weight of polyvinyl chloride resin),

[0030]

[Outer 1]

Was compounded.

(2) Manufacture of electric wires and cables Using a 90 m / m extruder, polyvinyl chloride resin-based insulation,
It has a polyvinyl chloride resin-based sheath, and the interpositions are shown in Table 1,
10 types (Example 3 type, Comparative example 7 type) of vinyl insulation, vinyl sheath, and control cable molded from the polyvinyl chloride resin composition having the composition components shown in 2: CVV 2
Each 1000m of × 2SQ (mm ² ) electric wire / cable was manufactured. Extrusion conditions are temperature conditions: die temperature: 180 ° C
(The temperature of each block from the hopper side to the die is C
₁ : 160 ℃, C ₂ : 170 ℃, C ₃ : 170 ℃,
_{C 4: 175 ℃, H:} 180 ℃, D: 180 ℃), screen mesh: No, extrusion rate: was 100 m / min.

FIG. 1 is a schematic explanatory view of the cross section of the obtained electric wire / cable for the peeling test.

(3) Peeling Test As peeling test samples, 200 samples each having a length of 200 mm (L = 200 mm) were prepared from the electric wires and cables obtained above. The material from which the sheath had been peeled off to a distance of 100 mm from one end was subjected to a peeling test. In the peeling test, in a room at a temperature of 23 ° C. and a humidity of 50%, the interposition and the core insulator are stripped from the end portion where the sheath is removed in advance, and it is observed whether or not a part of the interposition remains on the insulator. Then, as a result of the peeling test for each of the 200 samples, the number of samples in which no interposition remained on the insulator was recorded, and a case of less than 10 was judged to be acceptable and a case of 10 or more was judged to be unacceptable. The results of the peel test are shown in Tables 1 and 2.

FIG. 2 is a conceptual diagram for explaining the outline of the peeling test, in which the electric wire / cable cut out to a length of 200 mm (L = 200 mm) has the sheath 2 preliminarily set to a position 100 mm from the left end. The sample removed by peeling shows a state in which the interposer 1 has been stripped from the insulator 3 covering the conductor 4 by the peeling test (however, the stripped interposer is omitted. The interposer is located 100 mm from the left end). It is drawn as if it had been cut with, but this is a simplification to better understand the concept of the peel test.).

(4) Description of the results of Examples 1 to 3 As shown in Table 1, when the polyvinyl chloride resin composition of the preferred composition in the present invention was used for the molding of the interposition, the peeling test was conducted. As a result, no intervening residue remained in the insulator, and the effect of improving peelability was clearly recognized. It should be noted that the releasability is high even under the condition that the amount of the plasticizer added is relatively large and the tackiness increases as in Example 3.

(5) Description of the results of Comparative Examples 1 to 7 Table 2 shows the results of Comparative Examples 1 to 7.

In Comparative Examples 1 to 4, among the essential fillers of the present invention, hydrous silicic acid (hydrous silica) -containing calcium carbonate, hydrous silicic acid (hydrous silica), and calcium-substituted A-type zeolite, each of them was used alone. This is the case when they are used or a combination of two people is used. In any of these cases, the proportion of the sample in which a part of the interposition adheres to the insulator was high, and all were judged to be unacceptable.

Comparative Example 5 is a case where the addition amount of hydrous silicic acid (hydrous silica) -containing calcium carbonate was set to the upper limit of the preferable range or more, and under the above extrusion molding conditions, the viscosity became high and the extrusion It was impossible.

Further, in Comparative Examples 6 and 7, general calcium carbonate: heavy calcium carbonate (average particle size 1.
8 μm), it is shown that the peelability is not improved even when used in combination with the special calcium-substituted A-type zeolite.

[0041]

EFFECTS OF THE INVENTION A polyvinyl chloride resin composition having a large releasability from an insulator and excellent intermediary workability has been realized, and such a polyvinyl chloride resin composition is used to form an interposition. A wire / cable that has excellent peelability between the interposition and the insulator and has excellent terminal processability is possible.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a cross section of an electric wire / cable for a peel test.

FIG. 2 is a conceptual diagram showing an electric wire / cable sample in a state where a peeling test is completed. (The peeled interposition is not shown.)

[Explanation of symbols]

1 Polyvinyl chloride resin intervening 2 Polyvinyl chloride resin sheath 3 Polyvinyl chloride resin-based core insulator (insulation) 4 conductors

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI C08L 27/06 C08L 27/06 H01B 7/00 309 H01B 7/00 309B 7/17 C08L 23:04 // (C08L 27/06 H01B 7/18 E 23:04) (56) Reference JP-A-9-35544 (JP, A) JP-A-10-208558 (JP, A) JP-A-55-106256 (JP, A) JP-A-55-106256 7-330937 (JP, A) JP 55-142043 (JP, A) JP 4-318047 (JP, A) Actual development Sho 57-197111 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01B 3/16-3/56 H01B 7/17 CA (STN) REGISTRY (STN)

Claims (4)

(57) [Claims] 1. A polyvinyl chloride resin, a plasticizer, a stabilizer, and
Polyvinyl chloride resin 10 is added to a resin composition containing a lubricant.
2 parts by weight of calcium carbonate containing hydrous silicic acid to 0 part by weight
50 to 300 parts by weight, 5 to 20 parts by weight of hydrous silicic acid, and
Include 1 to 8 parts by weight of calcium-substituted A-type zeolite
Polyvinyl chloride resin set for interposing electric wires and cables
A product. 2. To 100 parts by weight of polyvinyl chloride resin
50 to 90 parts by weight of phthalate plasticizer, lead
(Pb) -based stabilizer or calcium-zinc (Ca / Z
n) 2 to 7 parts by weight of stabilizer, fatty acid metal salt lubricant or
2 to 7 parts by weight of ethylene wax lubricant, hydrous silicic acid
250 to 300 parts by weight of calcium carbonate, hydrous silica
5-20 parts by weight of acid, calcium-substituted A-type zeolite
For interposing electric wires / cables containing 1 to 8 parts by weight
Polyvinyl chloride resin composition. 3. A polyvinyl chloride resin, a plasticizer, a stabilizer, and
Polyvinyl chloride resin 10 is added to a resin composition containing a lubricant.
2 parts by weight of calcium carbonate containing hydrous silicic acid to 0 part by weight
50 to 300 parts by weight, 5 to 20 parts by weight of hydrous silicic acid, and
Include 1 to 8 parts by weight of calcium-substituted A-type zeolite
Molded using a polyvinyl chloride resin composition
Wires / cables with interposition. 4. To 100 parts by weight of polyvinyl chloride resin
50 to 90 parts by weight of phthalate plasticizer, lead
(Pb) -based stabilizer or calcium-zinc (Ca / Z
n) 2 to 7 parts by weight of stabilizer, fatty acid metal salt lubricant or
2 to 7 parts by weight of ethylene wax lubricant, hydrous silicic acid
250 to 300 parts by weight of calcium carbonate, hydrous silica
5-20 parts by weight of acid, calcium-substituted A-type zeolite
Using a polyvinyl chloride resin composition containing 1 to 8 parts by weight
Wires and cables with interpositions formed by.