JP5764154B2 - Flame-retardant resin composition and cable using the same - Google Patents

Description

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

  So-called eco-materials are widely used for cable coverings, cable sheaths, tubes, tapes, packaging materials, building materials, and the like.

  As such an ecomaterial, a composition obtained by adding talc as a flame retardant to a polyolefin resin and adding a silicone compound such as silicone oil or magnesium stearate as a flame retardant aid (described below) Patent Document 1).

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-mentioned problems, the present inventors have studied focusing on silicate compound particles that are flame retardants. 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 average particle size 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, the average particle diameter of the silicate compound particles is below a specific value, and the silicate compound It has also been found that the particles, the silicone-based compound, and the fatty acid-containing compound are each compounded in a specific ratio with respect to the base resin. That is, the present inventors have found that the above problems can be solved by the following invention.

That is, the present invention relates to a base resin that is a polyolefin compound, silicate compound 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, and 100 parts by mass of the base resin. A silicone compound compounded at a ratio of more than 1 part by mass and not more than 10 parts by mass, and a fatty acid-containing compound compounded at a ratio of more than 1 part by mass and not more than 20 parts by mass with respect to 100 parts by mass of the base resin. And a flame retardant resin composition having an average particle size of the silicate compound particles of 0.8 μm or more and 3.3 μm or less.

  According to the flame retardant resin composition of the present invention, the average particle size of the silicate compound particles is 0.8 μm or more and 3.3 μm or less, so that the silicate compound particles can be used even when the compounding amount of the silicate compound particles is small. Can effectively exhibit a flame retardant effect, so that excellent flame retardancy can be secured while securing 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, by using calcium silicate particles, a silicone-based compound, and a fatty acid-containing compound, the inventors of the present invention may increase the flame retardant effect of the resin composition by forming a surface barrier layer during combustion. I guess.

  Moreover, in the said flame-retardant resin composition, it is preferable that the said fatty acid containing compound is a fatty acid metal salt.

  In this case, particularly excellent mechanical properties can be obtained.

  The fatty acid metal salt is preferably magnesium stearate.

  In this case, compared with the case where a fatty-acid metal salt is not magnesium stearate, the flame-retardant resin composition which has the more outstanding flame retardance is obtained.

  The fatty acid metal salt may be calcium stearate.

  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.

  The present invention further includes an insulated wire 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 above-described flame-retardant resin composition. It is a cable composed of objects.

In the present invention, the “average particle diameter” means that each area S of a two-dimensional image when a plurality of silicate compound particles are observed with an SEM is obtained, and each area S is equal to the area of a circle. Think of these areas from 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 round cable. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. As shown in FIGS. 1 and 2, the round cable 10 includes an insulated wire 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. Silicate compound particles blended in the following proportions, a silicone compound blended in a proportion of 10 parts by mass or greater and greater than 1 part by mass with respect to 100 parts by mass of the base resin, and 1 with respect to 100 parts by mass of the base resin The fatty acid-containing compound is blended at a ratio of greater than 20 parts by mass and less than 20 parts by mass, and the average particle size of the silicate compound particles is 0.8 μm or more and 3.3 μm or less.

  The insulating layer 2 and the sheath 3 composed of the flame retardant resin composition can ensure excellent flame retardancy while ensuring excellent mechanical properties and surface smoothness. In particular, the sheath 3 that is the outermost layer in the round cable 10 can ensure excellent surface smoothness, and the surface of the sheath 3 has no or very little unevenness. For this reason, the surface of the round cable 10 becomes harder to be damaged.

[Cable manufacturing method]
Next, the manufacturing method of the round 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, silicate compound 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, and 100 parts by mass of the base resin. A silicone compound blended at a ratio of greater than 1 part by weight to 10 parts by weight or less, and a fatty acid-containing compound blended at a ratio of greater than 1 part by weight to 20 parts by weight or less with respect to 100 parts by weight of the base resin Is included.

(Base resin)
Examples of the base resin include polyethylene compounds (PE), polypropylene (PP), polyolefin compounds such as ethylene-ethyl acrylate copolymer (EEA) and ethylene-methyl acrylate copolymer (EMA), styrene-butadiene rubber (SBR). ) And the like.

  The base resin is preferably a polyolefin compound. In this case, an advantage that the insulating property and cost performance are superior can be obtained as compared with the case where the base resin is not a polyolefin compound.

(Silicate compound particles)
Silicate compound particles are particles composed of a silicate compound. Examples of the silicate compound include talc and clay. Examples of the clay include kaolin clay, wax clay, fired clay obtained by firing them, and modified clay whose surface is modified with a silane coupling agent. These can be used alone or in combination of two or more. Of these, kaolin clay is preferable. In this case, there is an advantage that the content of impurities is small and coloring is difficult.

  The average particle diameter of the silicate compound particles is 0.8 μm or more and 3.3 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 silicate compound particles is less than 0.8 μm.

  In addition, when the average particle size of the silicate compound particles is within the above range, superior surface smoothness can be obtained as compared with the case where the average particle size of the silicate compound particles exceeds 3.3 μm. The surface becomes more difficult to be damaged.

  The average particle diameter of the silicate compound particles is preferably 1 μm or more. In this case, more excellent flame retardancy can be obtained as compared with the case where the average particle diameter of the silicate compound particles is less than 1 μm.

  Moreover, when a silicate compound consists of talc, it is preferable that the average particle diameter of a silicate compound particle | grain is 2.5 micrometers or less. In this case, more excellent surface smoothness can be obtained as compared with the case where the average particle diameter of the silicate compound particles is larger than 2.5 μm.

  Moreover, when a silicate compound consists of clay, it is preferable that the average particle diameter of a silicate compound particle | grain is 2.2 micrometers or less. In this case, superior surface smoothness can be obtained as compared with the case where the average particle diameter of the silicate compound particles is larger than 2.2 μm.

  The silicate compound 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 is obtained as compared with the case where the proportion of the silicate compound 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 silicate compound particles with respect to 100 parts by mass of the base resin is within the above range, the flame retardancy is higher than when the blending ratio of the silicate compound particles with respect to 100 parts by mass of the base resin is larger than 120 parts by mass. The mechanical properties of the resin composition can be further improved.

  Moreover, it is preferable that a silicate compound particle | grain is mix | blended in the ratio of 80 mass parts or less, It is more preferable to mix | blend in the ratio of 50 mass parts or less, It is further more preferable to mix | blend in the ratio of 40 mass parts or less. . When the silicate compound particles are blended in the above range, the mechanical properties are ensured while sufficiently ensuring the flame retardancy of the flame retardant resin composition, compared to the case where the blending ratio exceeds the upper limit of each of the above ranges. It can be improved more 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. The polyorganosiloxane is used in the form of silicone oil, silicone powder, silicone gum or silicone resin. Among these, the polyorganosiloxane is preferably used in the form of silicone gum. In this case, bloom is less likely to occur.

  As described above, the silicone compound is blended in a proportion of more than 1 part 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 ratio of the silicone compound is 1 part 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 easily mixed with the base resin evenly, and it is difficult for partial formation of lumps.

  The silicone compound is preferably blended at a ratio of 3 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 3 parts by mass.

  The silicone compound may be previously attached to the surface of the silicate compound particle. In this case, segregation of the silicone compound is less likely to occur in the flame retardant resin composition, and the uniformity of characteristics in the flame retardant resin composition is further improved.

  As a method of attaching the silicone compound to the surface of the silicate compound particles, for example, the silicone compound is added to and mixed with the silicate compound particles to obtain a mixture. It can be obtained by drying for 40 minutes and grinding the dried mixture 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.

  The aliphatic compound is preferably a metal salt of a fatty acid. In this case, more excellent mechanical properties can be obtained than when the fatty acid-containing compound is not a metal salt of a fatty 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 or calcium stearate is preferable. 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 and calcium stearate.

  As described above, the fatty acid-containing compound is blended at a ratio of more than 1 part 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 is obtained as compared with the case where the proportion of the fatty acid-containing compound is 1 part 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 easily mixed evenly with the base resin, and it is difficult for partial formation of lumps.

  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 fatty acid-containing compound may be previously attached to the surface of the silicate compound particles together with the silicone compound. In this case, segregation of the silicone compound and the fatty acid-containing compound is less likely to occur in the flame retardant resin composition, and the uniformity of characteristics in the flame retardant resin composition is further improved.

  As a method of attaching the silicone compound and the fatty acid-containing compound to the surface of the silicate compound particle, for example, the silicone compound and the fatty acid-containing compound are added to and mixed with the silicate compound particle, and a mixture is obtained. It can be obtained by drying at 40 to 75 ° C. for 10 to 40 minutes and pulverizing the dried mixture with a Henschel mixer, an atomizer or the like.

  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, silicate compound particles, a silicone 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, silicate compound particles, and You may knead | mix with a fatty-acid 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, one insulated wire 4 obtained as described above is prepared, and these insulated wires 4 are covered with the 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 round cable 10 is obtained as described above.

  The present invention is not limited to the above embodiment. For example, although the round cable 10 has one insulated wire 4 in the above embodiment, the cable of the present invention is not limited to the round cable, and two insulated wires 4 are provided inside the sheath 3. It may have and 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.

(Examples 1-22 and Comparative Examples 1-17)
Base resin, silicone masterbatch (silicone MB), fatty acid-containing compound and silicate compound particles are blended in the blending amounts shown in Tables 1-7, and kneaded at 160 ° C. for 15 minutes with a Banbury mixer, flame retardant resin composition I got a thing. In Tables 1 to 7, the unit of the blending amount of each blending component is part by mass. Further, in Tables 1 to 7, there are examples and comparative examples in which the blending amount of the base resin is not 100 parts by mass. In these examples and comparative examples, PE or silicone as the base resin is also present in the silicone MB. PP is contained, and the total amount of the base resin and PE or PP in the silicone MB is 100 parts by mass.

  Specific examples of the base resin, silicone MB, silicate compound particles, and fatty acid-containing compound are as follows.

(A) Base resin (A-1) Polyethylene (PE)
Excellen GMH GH030 (trade name, manufactured by Sumitomo Chemical Co., Ltd.)
(A-2) Polypropylene (PP)
E-150GK (trade name, manufactured by Prime Polymer)
(A-3) Ethylene-ethyl acrylate copolymer (EEA)
Lexpearl A115 (trade name, manufactured by Nippon Polyethylene)
(A-4) Ethylene-methyl acrylate copolymer (EMA)
LOTRYL 16MA003 (trade name, manufactured by Arkema)
(A-5) Styrene-butadiene rubber (SBR)
Dynalon 1320P (trade name, manufactured by JSR)

(B-1) Silicone MB
(B-1-1) X-22-2125H (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.)
Contains 50% by weight silicone gum (dimethylpolysiloxane) and 50% by weight PE (B-1-2) X-22-1101 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.)
Contains 50% by weight silicone gum (dimethylpolysiloxane) and 50% by weight PP

(B-2) Silicone oil KF-96-350 pcs (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.)

(C) Silicate compound particles (C-1) Talc particles (C-1-1) NANO ACE D-600 (trade name, manufactured by Nippon Talc Co., Ltd.), average particle size 0.6 μm
(C-1-2) NANO ACE D-800 (trade name, manufactured by Nippon Talc Co., Ltd.), average particle size 0.8 μm
(C-1-3) NANO ACE D-1000 (trade name, manufactured by Nippon Talc Co., Ltd.), average particle size: 1.0 μm
(C-1-4) MICRO ACE SG-95 (trade name, manufactured by Nippon Talc Co., Ltd.), average particle size 2.5 μm
(C-1-5) MICRO ACE P-8 (trade name, manufactured by Nippon Talc Co., Ltd.), average particle size of 3.3 μm
(C-1-6) MICRO ACE P-6 (trade name, manufactured by Nippon Talc Co., Ltd.), average particle size 4.0 μm
(C-1-7) MICRO ACE K-1 (trade name, manufactured by Nippon Talc Co., Ltd.), average particle size 8.0 μm
(C-2) Clay particles (C-2-1) RC-1 (trade name, manufactured by Takehara Chemical Co., Ltd.), average particle size 0.4 μm
(C-2-2) Satintone No. 5 (trade name, manufactured by Takehara Chemical Co., Ltd.), average particle size 0.8 μm
(C-2-3) Glomax LL (trade name, manufactured by Takehara Chemical Co., Ltd.), average particle size 1.5 μm
(C-2-4) SPMA clay (trade name, manufactured by Shiroishi Calcium Industry Co., Ltd.), average particle size 2.2 μm
(C-2-5) No. 5 Kaolin clay (trade name, manufactured by Takehara Chemical Co., Ltd.), average particle size 5.3 μm

(D) Fatty acid-containing compound (D-1) Magnesium stearate Fcochem MGS (trade name, manufactured by ADEKA)
(D-2) Calcium stearate SC-P (trade name, manufactured by Sakai Chemical Co., Ltd.)
(D-3) Stearic acid sakura (trade name, manufactured by NOF Corporation)
(D-4) Lauric acid NAA-122 (trade name, manufactured by NOF Corporation)
(D-5) NAA-222S behenate (trade name, manufactured by NOF Corporation)

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.

  About the insulated wire of Examples 1-22 and Comparative Examples 1-17 obtained as mentioned above, flame retardance, mechanical characteristics, and surface smoothness were evaluated as follows.

<Flame retardance>
About the insulated wire of Examples 1-22 and Comparative Examples 1-17, the 60 degree inclination combustion test of JISC3005 was done and the flame retardance was evaluated. The results are shown in Tables 1-7. In Tables 1 to 7, for each example and comparative example, 10 insulated wires are prepared and a flame retardancy test is performed, and the average value of the fire extinguishing time (unit: seconds) of 10 insulated wires is measured. did. Here, the fire extinguishing time is the time from self-extinguishing immediately after the end of flame contact (immediately after releasing the burner flame from the electric wire), 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 30 seconds. The results are shown in Tables 1-7. In Tables 1 to 7, the unit of the average value of the fire extinguishing time is seconds, and the acceptance criteria for the average value of the fire extinguishing time are as follows.

60 seconds or less: Pass over 60 seconds: Fail

In addition, in Tables 1-7, in the case of a pass in terms of flame retardancy, in the column of “Self-extinguishing” in Tables 1-7, “○” is written together, and in the case of a failure in terms of flame retardancy Is written together with “x” in the “self-extinguishing” column of Tables 1-7. In Tables 6 and 7, “Completion of fire” was displayed in the “Fire extinguishing time (seconds)” column for comparative examples that did not self-extinguish.

<Mechanical properties>
The mechanical characteristics were evaluated based on the measured tensile strength of the insulated wires of Examples 1 to 22 and Comparative Examples 2, 3, 5, 14, 16, and 17 according to JIS C3005. The results are shown in Tables 1-7. In Tables 1 to 7, the unit of tensile strength was MPa, and the pass / fail criteria for tensile strength was as follows. In the tensile test, the tensile speed was 200 mm / min, and the distance between the marked lines was 20 mm. In Comparative Examples 1, 4, 6 to 13 and 15, since the acceptance criteria were not satisfied in terms of flame retardancy or surface smoothness, mechanical properties were not evaluated. ".

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 Examples 1 to 22 and Comparative Examples 2, 3, 5, 16, and 17. The results are shown in Tables 1-7. In addition, about Comparative Examples 1, 4, and 6-15, since it did not satisfy the acceptance criteria in terms of flame retardancy or mechanical properties, the evaluation for surface smoothness was not performed, and “−” was shown in Table 5. .

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 7, the insulated wires of Examples 1 to 22 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 17 did not reach the acceptance criteria for any 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 ... Internal conductor 2 ... Insulating layer 3 ... Sheath 4 ... Insulated wire 10 ... Round cable

Claims (6)

A base resin that is a polyolefin compound ;
Silicate compound 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 compounded in a proportion of greater than 1 part 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 1 part by weight and less than or equal to 20 parts by weight relative to 100 parts by weight of the base resin
The flame retardant resin composition in which the average particle diameter of the silicate compound particles is 0.8 μm or more and 3.3 μm or less. The flame retardant resin composition according to claim 1 , wherein the fatty acid-containing compound is a fatty acid metal salt. The flame retardant resin composition according to claim 2 , wherein the fatty acid metal salt is magnesium stearate. The flame retardant resin composition according to claim 2 , wherein the fatty acid metal salt is calcium stearate. Conductors,
An insulated wire having an insulating layer covering the conductor;
The cable in which the said insulating layer is comprised with the flame-retardant resin composition as described in any one of Claims 1-4 . Conductors,
An insulating layer covering the conductor;
Comprising an insulated wire having a sheath covering the insulating layer;
The cable comprised with the flame-retardant resin composition as described in any one of Claims 1-4 in which at least one of the said insulating layer and the said sheath is.

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