JP5167425B1 - Flame-retardant resin composition and cable using the same - Google Patents

Abstract

The present invention provides a flame retardant resin composition that can ensure excellent mechanical properties and surface smoothness while ensuring excellent flame retardancy.
SOLUTION: The base resin, calcium carbonate particles blended at a ratio of 10 parts by mass to 120 parts by mass with respect to 100 parts by mass of the base resin, and 10 parts by mass greater than 3 parts by mass with respect to 100 parts by mass of the base resin. An average particle diameter of calcium carbonate particles, including a silicone compound compounded at a ratio of less than or equal to parts and a fatty acid-containing compound compounded at a ratio of greater than 3 parts by mass and less than or equal to 20 parts by mass relative to 100 parts by mass of the base resin Is a flame-retardant resin composition in which the base resin is a polyolefin compound.
[Selection figure] None

Description

  The present invention relates to a flame retardant resin composition and a cable using the same.

  Polyvinyl chloride compositions are widely used in wire coatings, tubes, tapes, packaging materials, building materials, etc. due to their good electrical insulation and excellent flame retardancy and mechanical properties. Due to concerns about the impact on the environment and the human body, lead-free polyvinyl chloride resins that do not use lead as a stabilizer are becoming mainstream.

  Since the lead-free polyvinyl chloride resin contains chlorine atoms in its molecular structure, it generates toxic and harmful chlorine gas during combustion. Therefore, a vinyl chloride electric wire replacement using a so-called eco-material with higher safety is being studied.

  As such an ecomaterial, a composition is known in which calcium carbonate is added as a flame retardant to a polyolefin resin, and a silicone compound such as silicone oil or magnesium stearate is added as a flame retardant aid ( See Patent Document 1 below).

JP-A-9-169918

  However, it has been difficult to say that the composition described in Patent Document 1 has sufficient flame retardancy. Here, if the amount of the flame retardant added is increased, the flame retardancy can be improved. However, in this case, the mechanical properties and surface smoothness of the composition are lowered.

  For this reason, the flame-retardant resin composition which can ensure the outstanding flame retardance while ensuring the outstanding mechanical property and surface smoothness was calculated | required.

  This invention is made | formed in view of the said situation, The flame-retardant resin composition which can also ensure the outstanding flame retardance while ensuring the outstanding mechanical characteristic and surface smoothness, and this were used. The purpose is to provide a cable.

  In order to solve the above-described problems, the present inventors have studied paying attention to calcium carbonate which is a flame retardant. As a result, it is usually necessary to increase the specific surface area of the flame retardant by reducing the average particle size of the flame retardant particles in order to ensure flame retardancy. It has been found that by setting the diameter to a specific value or more, an excellent flame retardant effect is exhibited even if the blending amount is small. Furthermore, it is possible to ensure excellent mechanical properties and surface smoothness while exhibiting such excellent flame retardant effect by using a polyolefin compound as the base resin, and each of the silicone compound and the fatty acid-containing compound is a base resin. It was also found that it was a case where it was blended at a specific ratio. That is, the present inventors have found that the above problems can be solved by the following invention.

That is, the present invention includes a base resin, calcium carbonate particles blended at a ratio of 10 parts by mass to 120 parts by mass with respect to 100 parts by mass of the base resin, and 3 parts by mass with respect to 100 parts by mass of the base resin. Including a silicone compound compounded at a ratio of 10 parts by mass or less and a fatty acid-containing compound compounded at a ratio of more than 3 parts by mass and 20 parts by mass or less with respect to 100 parts by mass of the base resin, The average particle size of the particles is a flame retardant resin composition having a particle size greater than 1.8 μm and 3.6 μm or less, and the base resin is a polyolefin compound.

According to the flame retardant resin composition of the present invention, the average particle size of the calcium carbonate particles is set to be larger than 1.8 μm and 3.6 μm or less, so that the calcium carbonate particles are effective even when the blending amount of the calcium carbonate particles is small. Therefore, it is possible to ensure excellent flame retardancy while ensuring excellent mechanical properties and surface smoothness.

  In addition, the present inventors speculate as follows about the reason why more excellent flame retardancy is obtained in the flame retardant resin composition of the present invention.

That is, a surface barrier layer is formed at the time of combustion by using calcium carbonate particles, a silicone compound, and a fatty acid-containing compound. At this time, if the surface barrier layer is dense and such a dense surface barrier layer is quickly formed, it is considered that the flame retardant effect is enhanced. In order for the dense surface barrier layer to be formed quickly, it is necessary to close the gaps between the particles of calcium carbonate or decomposition products constituting the surface barrier layer as quickly as possible. In this respect, as in the present invention, the average particle size of the calcium carbonate particles is larger than 1.8 .mu.m, since the specific surface area is reduced, it is possible to close quickly the gap between the calcium carbonate particles. As a result, it is considered that the formation speed of the dense surface barrier layer is increased and the flame retardant effect is enhanced.

  In the said flame-retardant resin composition, it is preferable that the said silicone type compound is mix | blended in the ratio of 5 mass parts or less with respect to 100 mass parts of said base resins.

  In this case, superior mechanical properties can be obtained as compared with the case where the proportion of the silicone compound is larger than 5 parts by mass.

  Moreover, in the said flame-retardant resin composition, it is preferable that the said fatty acid containing compound is mix | blended in the ratio of 10 mass parts or less with respect to 100 mass parts of said base resins.

  In this case, superior mechanical properties can be obtained as compared with the case where the proportion of the fatty acid-containing compound is larger than 10 parts by mass.

  In the flame retardant resin composition, the calcium carbonate particles are, for example, heavy calcium carbonate or light calcium carbonate.

  In the flame retardant resin composition, the silicone compound is preferably a silicone gum.

  In this case, bloom is less likely to occur.

  In the flame retardant resin composition, the fatty acid-containing compound is preferably magnesium stearate. In this case, more excellent flame retardancy can be obtained as compared with the case where the fatty acid-containing compound is not magnesium stearate.

  In the flame retardant resin composition, the fatty acid-containing compound may be stearic acid.

  Moreover, this invention is equipped with the insulated wire which has a conductor and the insulating layer which coat | covers the said conductor, and the said insulating layer is a cable comprised with the flame-retardant resin composition mentioned above.

Furthermore, the present invention is a cable having a conductor, an insulating layer covering the conductor, and a sheath covering the insulating layer, wherein at least one of the insulating layer and the sheath is the flame retardant resin composition described above. It is a configured cable.

In the present invention, the “average particle size” means that the area S of the two-dimensional image when a plurality of calcium carbonate particles are observed with an SEM is obtained, and these areas S are considered to be equal to the area of a circle, respectively. From these areas, the following formula:
R = 2 × (S / π) ^1/2
The average value of R calculated based on

  ADVANTAGE OF THE INVENTION According to this invention, the flame retardant resin composition which can ensure the outstanding flame retardance while ensuring the outstanding mechanical characteristic and surface smoothness, and a cable using the same are provided.

It is a partial side view which shows one Embodiment of the cable of this invention. It is sectional drawing along the II-II line of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.

[cable]
FIG. 1 is a partial side view showing an embodiment of a cable according to the present invention, and shows a flat cable. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. As shown in FIGS. 1 and 2, the flat cable 10 includes two insulated wires 4 and a sheath 3 that covers the two insulated wires 4. The insulated wire 4 includes an inner conductor 1 and an insulating layer 2 that covers the inner conductor 1.

  Here, the insulating layer 2 and the sheath 3 are made of a flame retardant resin composition, and the flame retardant resin composition is 10 parts by mass or more and 120 parts by mass with respect to 100 parts by mass of the base resin and the base resin. Calcium carbonate particles blended at the following ratio, silicone compound blended at a ratio of greater than 3 parts by weight and less than 10 parts by weight with respect to 100 parts by weight of the base resin, and 3 parts by weight with respect to 100 parts by weight of the base resin And a fatty acid-containing compound blended at a ratio of 20 parts by mass or less. Here, the average particle diameter of the calcium carbonate particles is 1.2 μm or more and 3.6 μm or less, and the base resin is a polyolefin compound.

  The insulating layer 2 and the sheath 3 composed of the flame retardant resin composition have an average particle size of calcium carbonate particles of 1.2 μm or more and 3.6 μm or less, so that the amount of calcium carbonate particles is small. Since the calcium carbonate particles can effectively exhibit a flame retarding effect, excellent flame retardancy can be secured while securing excellent mechanical properties and surface smoothness. In particular, the sheath 3 can ensure excellent surface smoothness. For this reason, in the sheath 3, there is no unevenness on the surface, or even if it exists, it is very small. For this reason, the surface of the sheath 3 becomes more difficult to be damaged.

[Cable manufacturing method]
Next, the manufacturing method of the flat cable 10 mentioned above is demonstrated.

(conductor)
First, the inner conductor 1 is prepared. The inner conductor 1 may be composed of only one strand, or may be configured by bundling a plurality of strands. Further, the inner conductor 1 is not particularly limited with respect to the conductor diameter, the material of the conductor, and the like, and can be appropriately determined according to the application.

(Flame retardant resin composition)
On the other hand, the flame retardant resin composition is prepared. As described above, the flame retardant resin composition includes the base resin, calcium carbonate particles blended at a ratio of 10 parts by mass to 120 parts by mass with respect to 100 parts by mass of the base resin, and 100 parts by mass of the base resin. On the other hand, a silicone compound compounded at a ratio of more than 3 parts by mass and 10 parts by mass or less, and a fatty acid-containing compound compounded at a ratio of more than 3 parts by mass and 20 parts by mass or less with respect to 100 parts by mass of the base resin. Contains. Here, the base resin is a polyolefin compound.

(Base resin)
As described above, the base resin is not particularly limited as long as it is a polyolefin compound. Examples of such a polyolefin compound include polyethylene and polypropylene.

(Calcium carbonate particles)
The calcium carbonate particles may be either heavy calcium carbonate or light calcium carbonate.

  The average particle diameter of the calcium carbonate particles is 1.2 μm or more and 3.6 μm or less. In this case, more excellent flame retardancy can be obtained as compared with the case where the average particle diameter of the calcium carbonate particles is less than 1.2 μm.

  In addition, when the average particle diameter of the calcium carbonate particles is within the above range, superior surface smoothness can be obtained as compared with the case where the average particle diameter of the calcium carbonate particles exceeds 3.6 μm, and the surface of the sheath 3 is improved. It becomes harder to get hurt.

  The average particle size of the calcium carbonate particles is preferably larger than 1.8 μm. In this case, more excellent flame retardancy can be obtained as compared with the case where the average particle diameter of the calcium carbonate particles is 1.8 μm or less.

  The calcium carbonate particles are blended at a ratio of 10 parts by mass or more and 120 parts by mass or less with respect to 100 parts by mass of the base resin. In this case, more excellent flame retardancy can be obtained as compared with the case where the proportion of the calcium carbonate particles is less than 10 parts by mass with respect to 100 parts by mass of the base resin.

  Further, when the blending ratio of the calcium carbonate particles with respect to 100 parts by mass of the base resin is within the above range, the flame retardant resin composition is compared with the case where the blending ratio of the calcium carbonate particles with respect to 100 parts by mass of the base resin is larger than 120 parts by mass. The mechanical properties of the object can be further improved.

  The calcium carbonate particles are preferably blended at a ratio of 80 parts by weight or less, more preferably blended at a ratio of 50 parts by weight or less, and further preferably blended at a ratio of 40 parts by weight or less. It is still more preferable to mix | blend in the ratio of 30 mass parts or less, and it is especially preferable to mix | blend in the ratio of 20 mass parts or less. When calcium carbonate particles are blended in the above range, compared with the case where the blending ratio exceeds the upper limit of each of the above ranges, the mechanical properties are further improved while sufficiently ensuring the flame retardancy of the flame retardant resin composition. It can be improved sufficiently.

(Silicone compound)
The silicone-based compound functions as a flame retardant aid, and examples thereof include polyorganosiloxane. Here, the polyorganosiloxane has a siloxane bond as a main chain and an organic group in a side chain. Examples of the organic group include a methyl group, a vinyl group, an ethyl group, a propyl group, and a phenyl group. Specific examples of the polyorganosiloxane include dimethylpolysiloxane, methylethylpolysiloxane, methyloctylpolysiloxane, methylvinylpolysiloxane, methylphenylpolysiloxane, and methyl (3,3,3-trifluoropropyl) polysiloxane. Is mentioned. Examples of the polyorganosiloxane include silicone powder, silicone gum, and silicone resin. Among these, silicone gum is preferable. In this case, bloom is less likely to occur.

  As described above, the silicone compound is blended in a proportion of greater than 3 parts by mass and less than 10 parts by mass with respect to 100 parts by mass of the base resin. In this case, more excellent flame retardancy can be obtained as compared with the case where the proportion of the silicone compound is 3 parts by mass or less.

  Moreover, when the compounding ratio of the silicone compound relative to 100 parts by mass of the base resin is within the above range, more excellent surface smoothness can be obtained as compared with the case where the compounding ratio of the silicone compound is larger than 10 parts by mass. This is because the silicone compound is not evenly mixed with the base resin and a lump is partially generated.

  The silicone compound is preferably blended at a ratio of 5 parts by mass or less. In this case, superior mechanical properties can be obtained as compared with the case where the proportion of the silicone compound is larger than 5 parts by mass.

  The silicone compound may be attached in advance to the surface of the calcium carbonate particles. In this case, it is preferable that the entire calcium carbonate particles contained in the flame retardant resin composition are coated with a silicone compound. In this case, since the calcium carbonate particles can be easily dispersed in the base resin, the uniformity of characteristics in the flame retardant resin composition is further improved.

  As a method for adhering a silicone compound to the surface of calcium carbonate, for example, a silicone compound is added to and mixed with calcium carbonate particles to obtain a mixture, and then the mixture is dried at 40 to 75 ° C. for 10 to 40 minutes. The dried mixture can be obtained by pulverizing with a Henschel mixer, an atomizer or the like.

(Fatty acid-containing compound)
The fatty acid-containing compound functions as a flame retardant aid. The fatty acid-containing compound refers to a compound containing a fatty acid or a metal salt thereof. Here, as the fatty acid, for example, a fatty acid having 12 to 28 carbon atoms is used. Examples of such fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, tuberculostearic acid, oleic acid, linoleic acid, arachidonic acid, behenic acid and montanic acid. Among these, as the fatty acid, stearic acid or tuberculostearic acid is preferable, and stearic acid is particularly preferable. In this case, more excellent flame retardancy can be obtained as compared with the case of using a fatty acid other than stearic acid or tuberculostearic acid.

  Examples of the metal constituting the fatty acid metal salt include magnesium, calcium, zinc and lead. As the fatty acid metal salt, magnesium stearate is preferred. In this case, more excellent flame retardancy can be obtained as compared with the case of using a fatty acid metal salt other than magnesium stearate.

  As described above, the fatty acid-containing compound is blended at a ratio of more than 3 parts by mass and 20 parts by mass or less with respect to 100 parts by mass of the base resin. In this case, more excellent flame retardancy can be obtained as compared with the case where the proportion of the fatty acid-containing compound is 3 parts by mass or less.

  Further, when the blending ratio of the fatty acid-containing compound with respect to 100 parts by mass of the base resin is within the above range, the surface smoothness is more excellent than when the blending ratio of the fatty acid-containing compound with respect to 100 parts by mass of the base resin is larger than 20 parts by mass. Sex is obtained. This is because the fatty acid-containing compound is not evenly mixed with the base resin and a lump is partially generated.

  It is preferable that a fatty acid containing compound is mix | blended in the ratio of 10 mass parts or less. In this case, superior mechanical properties can be obtained as compared with the case where the proportion of the fatty acid-containing compound is larger than 10 parts by mass.

  The flame retardant resin composition may further contain a filler such as an antioxidant, an ultraviolet deterioration inhibitor, a processing aid, a color pigment, a lubricant, and carbon black as necessary.

  The flame retardant resin composition can be obtained by kneading a base resin, calcium carbonate, a silicone-based compound, a fatty acid-containing compound, and the like. The kneading can be performed with a kneading machine such as a Banbury mixer, a tumbler, a pressure kneader, a kneading extruder, a twin screw extruder, a mixing roll, and the like. At this time, from the viewpoint of improving the dispersibility of the silicone compound, a part of the base resin and the silicone compound are kneaded, and the obtained master batch (MB) is mixed with the remaining base resin, calcium carbonate particles and fatty acid. You may knead | mix with a containing compound etc.

  Next, the inner conductor 1 is covered with the flame retardant resin composition. Specifically, the flame retardant resin composition is melt kneaded using an extruder to form a tubular extrudate. Then, the tubular extrudate is continuously coated on the inner conductor 1. Thus, the insulated wire 4 is obtained.

(sheath)
Finally, two insulated wires 4 obtained as described above are prepared, and these insulated wires 4 are covered with a sheath 3 produced using the above-mentioned flame-retardant resin composition. The sheath 3 protects the insulating layer 2 from physical or chemical damage.

  The flat cable 10 is obtained as described above.

  The present invention is not limited to the above embodiment. For example, although the flat cable 10 has two insulated wires 4 in the above embodiment, the cable of the present invention is not limited to the flat cable, and only one insulated wire 4 is provided inside the sheath 3. You may have, and you may have three or more. A resin portion made of polypropylene or the like may be provided between the sheath 3 and the insulated wire 4.

  Moreover, in the said embodiment, although the insulating layer 2 and the sheath 3 of the insulated wire 4 are comprised with said flame-retardant resin composition, the insulating layer 2 is comprised with normal insulating resin, and only the sheath 3 is insulated. The layer 2 may be composed of a flame retardant resin composition.

  Hereinafter, the content of the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to the following examples.

( Reference Examples 1 to 20, Examples 8 to 11 and Comparative Examples 1 to 14)
Polyethylene (PE), silicone masterbatch (silicone MB), fatty acid-containing compound and calcium carbonate particles are blended in the blending amounts shown in Tables 1 to 8, and kneaded at 160 ° C. for 15 minutes with a Banbury mixer, flame retardant resin A composition was obtained. In Tables 1 to 8, the unit of the blending amount of each blending component is part by mass. Moreover, in Tables 1-8, although the compounding quantity of PE is not 100 mass parts, PE is also contained in silicone MB, and if PE and PE in silicone MB are totaled, it will be 100 mass parts. .

Specific examples of the polyethylene, silicone MB, calcium carbonate particles, fatty acid-containing compound, and n-octadecane as hydrocarbons were as follows.
(1) Polyethylene (PE)
Excellen GMH GH030 (trade name, manufactured by Sumitomo Chemical Co., Ltd.)

(2) Silicone MB
X-22-2125H (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.)
Contains 50% silicone gum and 50% PE by weight

(3) Calcium carbonate particles A) Calcium carbonate particles (average particle size 0.70 μm)
Softon 3200 (trade name, manufactured by Shiraishi Calcium)
B) Calcium carbonate particles (average particle size 1.0μm)
NCC P-2300 (trade name, manufactured by Nitto Flour Chemical Co., Ltd.)
C) Calcium carbonate particles (average particle size 1.2μm)
NCC P-1000 (trade name, manufactured by Nitto Flour Chemical Co., Ltd.)
D) Calcium carbonate particles (average particle size 1.5μm)
Softon 1500 (trade name, manufactured by Shiraishi Calcium)
E) Calcium carbonate particles (average particle size 1.7μm)
NCC-P (trade name, manufactured by Nitto Flour Chemical Co., Ltd.)
F) Calcium carbonate particles (average particle size 1.8μm)
Softon 1200 (trade name, manufactured by Shiraishi Calcium)
G) Calcium carbonate particles (average particle size 2.2μm)
Softon 1000 (trade name, manufactured by Shiraishi Calcium)
H) Calcium carbonate particles (average particle size 3.6μm)
BF100 (trade name, manufactured by Shiraishi Calcium Co., Ltd.)
I) Calcium carbonate particles (average particle size 8.0μm)
BF300 (trade name, manufactured by Shiraishi Calcium)
J) Calcium carbonate particles (average particle size 14.8μm)
NN # 200 (trade name, manufactured by Nitto Powder Chemical Co., Ltd.)

(4) Fatty acid-containing compound A) Mg stearate
Fcochem MGS (trade name, manufactured by ADEKA)
B) Stearic acid sakura (trade name, manufactured by NOF Corporation)
C) Lauric acid NAA-122 (trade name, manufactured by NOF Corporation)
D) Behenic acid NAA-222S (trade name, manufactured by NOF Corporation)
E) Montanic acid lycowax S (trade name, manufactured by Clariant Japan)
(5) n-octadecane octadecane (trade name, manufactured by Pure Chemical Industries)

Next, this flame retardant resin composition was kneaded at 160 ° C. for 15 minutes by a Banbury mixer. Thereafter, the flame retardant resin composition is put into a single screw extruder (L / D = 20, screw shape: full flight screw, manufactured by Mars Seiki Co., Ltd.), and a tubular extrudate is extruded from the extruder. A conductor (number of strands / cross-sectional area of 2 mm ² ) was coated to a thickness of 0.7 mm. Thus, an insulated wire was obtained.

For the insulated wires of Reference Examples 1 to 20, Examples 8 to 11 and Comparative Examples 1 to 14 obtained as described above, flame retardancy, mechanical properties, and surface smoothness were evaluated as follows. It was.

<Flame retardance>
About the insulated wire of Reference Examples 1-20, Examples 8-11 , and Comparative Examples 1-14, the vertical combustion test was done based on JISC3665, and the flame retardance was evaluated. The results are shown in Tables 1-8. At this time, specifically, if the length from the lower end of the upper support material that supports the insulated wire at the upper part to the end point of carbonization is 50 mm or more and 540 mm or less, it is indicated by “A” rank, and less than 50 mm or 540 mm In the case of super, it is indicated by “B” rank. Furthermore, for the examples and comparative examples displayed in rank “A”, the fire extinguishing time (unit: seconds) is also written for reference under “A” in the item “Flame retardance (vertical combustion test)”. did. Here, the fire extinguishing time is the time from immediately after the end of flame contact (immediately after separating the burner flame from the electric wire) to self-extinguishing, and the shorter the fire extinguishing time, the higher the flame retardancy. At this time, the flame contact was performed until ignition of the electric wire occurred within 60 seconds. For example, a fire extinguishing time of 0 seconds means a state in which after flame contact for 60 seconds, there is no after flame immediately after releasing the burner. Moreover, about the comparative example displayed by "B" rank, it did not self-extinguish but displayed "burning" under "B" in the item of "flame retardance (vertical combustion test)". The acceptance criteria for flame retardancy were as follows.

A: Pass B: Fail

<Mechanical properties>
The mechanical properties were evaluated based on the measured tensile strength by conducting a tensile test according to JIS C3005 on the insulated wires of Reference Examples 1 to 20, Examples 8 to 11 and Comparative Examples 1 to 14. The results are shown in Tables 1-8. In Tables 1-8, the unit of tensile strength was MPa, and the pass / fail criteria for tensile strength were as follows. In the tensile test, the tensile speed was 200 mm / min, and the distance between the marked lines was 20 mm.

10 MPa or more: pass less than 10 MPa: fail

<Surface smoothness>
The surface smoothness was evaluated according to the following criteria I to IV for the insulated wires of Reference Examples 1 to 20, Examples 8 to 11 and Comparative Examples 1 to 14. The results are shown in Tables 1-8.

I: Unevenness cannot be confirmed even when touched and gloss is seen on the surface II: Unevenness cannot be confirmed even when touched and no gloss is seen on the surface III: Unevenness can be confirmed by touching, but the unevenness is confirmed visually Impossible IV: Unevenness can be confirmed by touching and can be confirmed visually

The acceptance criteria for surface smoothness were as follows.

Surface smoothness is I or II: Pass surface smoothness is III or IV: Fail

From the results shown in Tables 1 to 8 , the insulated wires of Reference Examples 1 to 20 and Examples 8 to 11 reached the acceptance criteria for all of flame retardancy, mechanical properties, and surface smoothness. On the other hand, the insulated wires of Comparative Examples 1 to 14 did not reach the acceptance criteria for at least one of flame retardancy, mechanical properties, and surface smoothness.

  From this, it was confirmed that according to the flame retardant resin composition of the present invention, excellent flame retardancy can be ensured while ensuring excellent mechanical properties and surface smoothness.

DESCRIPTION OF SYMBOLS 1 ... Inner conductor 2 ... Insulating layer 3 ... Sheath 4 ... Insulated electric wire 10 ... Flat cable

Claims (9)

A base resin;
Calcium carbonate particles blended at a ratio of 10 parts by mass or more and 120 parts by mass or less with respect to 100 parts by mass of the base resin;
A silicone compound blended in a proportion of greater than 3 parts by weight and less than or equal to 10 parts by weight with respect to 100 parts by weight of the base resin;
A fatty acid-containing compound that is blended at a ratio of greater than 3 parts by weight and less than or equal to 20 parts by weight with respect to 100 parts by weight of the base resin,
The average particle size of the calcium carbonate particles is larger than 1.8 μm and not larger than 3.6 μm,
A flame retardant resin composition in which the base resin is a polyolefin compound. The flame-retardant resin composition according to claim 1, wherein the silicone compound is blended at a ratio of 5 parts by mass or less with respect to 100 parts by mass of the base resin. The flame-retardant resin composition of Claim 1 or 2 with which the said fatty acid containing compound is mix | blended in the ratio of 10 mass parts or less with respect to 100 mass parts of said base resins. The flame-retardant resin composition according to any one of claims 1 to 3, wherein the calcium carbonate particles are heavy calcium carbonate or light calcium carbonate. The flame retardant resin composition according to any one of claims 1 to 4, wherein the silicone compound is silicone gum. The flame retardant resin composition according to any one of claims 1 to 5, wherein the fatty acid-containing compound is magnesium stearate. The flame retardant resin composition according to any one of claims 1 to 5, wherein the fatty acid-containing compound is stearic acid. Conductors,
An insulated wire having an insulating layer covering the conductor;
The cable with which the said insulating layer is comprised with the flame-retardant resin composition as described in any one of Claims 1-7 . Conductors,
An insulating layer covering the conductor;
A cable having a sheath covering the insulating layer ,
A cable in which at least one of the insulating layer and the sheath is composed of the flame retardant resin composition according to any one of claims 1 to 7 .

Images