KR100819607B1 - Composition for production improved flame retardant insulating and sheath material of halogen free type, insulating materials and insulatin cable using the same - Google Patents

Abstract

The present invention relates to a composition for producing non-halogen-based insulation and sheath material having improved flame retardancy, an insulation material for an electric wire and an insulated wire using the same. The non-halogen-based insulation and sheath material composition for improving flame retardancy provided by the present invention is based on a blended resin blended with 50 to 99% by weight of a polyolefin resin and 1 to 50% by weight of a reactive polyolefin resin having a polar group introduced therein. Used as a resin, 100 to 250 parts by weight of an inorganic flame retardant based on 100 parts by weight of the base resin; 30 to 70 parts by weight of flame retardant aids; And 1 to 10 parts by weight of the silicon-based additives. According to the present invention, while producing a non-halogen-based insulation and sheath material that does not significantly affect the mechanical properties of the various wires required in the prior art, by improving the flame retardancy of the conventional non-halogen-based insulation and the sheath material, etc. It is preferable to have sufficient resistance against.

Flame retardant, non-halogen, insulating material, sheath material, inorganic flame retardant, silicone,

Description

Composition for production improved flame retardant insulating and sheath material of halogen free type, insulating materials and insulatin cable using the same}

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a cross-sectional view of a UTP cable (category 5) in which a sheath body is manufactured with a composition for a low smoke and high flame retardant material according to the present invention.

2 is a cross-sectional view of a UTP cable (category 6) in which a sheath body is made of a composition for low-flammability and high-flammability material according to the present invention.

<Description of main parts of drawing>

11 ... wire 13 ... pair 15 ... sheath

17 ... conductor 19 ... insulating coating layer 21 ... cross filler

100 ... category 5 UTP cable 200 ... category 6 UTP cable

The present invention relates to a composition for producing non-halogen-based insulation and sheath material with improved flame retardancy, an insulator for wires and an insulated wire using the same, wherein a mixed resin blended with a polyolefin-based resin and a reactive polyolefin-based resin having a polar group introduced therein is used as a basic resin. The present invention relates to a composition for producing non-halogen-based insulation and sheath material having improved flame retardancy through a predetermined additive material such as an inorganic flame retardant, and an insulation material for an electric wire and an insulated wire using the same.

UTP is an acronym for unshieled twisted pair. Unshielded pair cable, also called unshielded twisted pair cable. The most common type of UTP is copper wire, which is used as a signal line connecting the environment of a general telephone line or a local area network (LAN). UTP is a standard signal line used for 100 Mbit LAN card. Its appearance is composed of RJ-45 connector and cable similar to telephone line, and the inside line is composed of 8 strands of signal line. If you peel off and look inside, there are four pairs of twisted wires. Each of these two strands consists of four pairs of lines, each of which has a total of eight different line colors, and the pin number is set according to different colors. Of these eight strands, the signal lines actually used are four strands, and the remaining four strands are all used for grounding.

UTP cables fall into several categories depending on the quality of the cable. The category is a UTP cable standard rated according to quality by the Electronics Industry Promotion Association (EIA), with the lowest quality rated at 1 and the highest rated at 5. Category 2 is used for general telephone lines, category 3 for 10Mbps LAN, category 4 for 16Mbps Token Ring network, and category 5 for 100Mbps LAN. Recently, cables classified into category 6 have also been proposed.

The outer surfaces of various electric wires such as the above-described UTP, general electric wires, telephone wires, various communication cables, and the like are covered with a sheath material, and the insulation layer is exposed to make direct contact with the outside. However, when a fire occurs in a space where such an electric wire is installed, the smoke is excessively generated, and in the case of a highly combustible material, it may be used as a passage for fire spreading, and thus has low smokeability and high flame retardancy. There will be no reason for the material having to be used. However, conventionally known non-halogen flame retardant materials do not satisfy the CM class flame retardant test (IEC 6033-3 standard). On the other hand, in order to satisfy the flame retardant conditions other than the above standards, it is necessary to use a large amount of flame retardants such as metal hydroxide, which results in the disadvantage that the material is excessively cured, the flexibility is lost, elongation rate is reduced. In addition, there is a problem that the workability of the material is lowered, such as a slow extrusion line speed or die build-up in the extruder.

Therefore, there has been a continuous effort in the industry to mix materials to ensure that even the effects expected in added materials are sufficiently expressed without causing major changes in the required basic physical properties. And finding the appropriate range of additives and their contents that can sufficiently express the desired effect is not only easy in the relevant industry, but any motivation for the development of technology from these, even if there is an underlying material. It is obvious that there are technical limitations that cannot be obtained.

The present invention provides a material capable of constituting the insulation and sheath layer of the electric wire, but preparing a non-halogen-based insulation and sheath layer, in particular, while producing a material having enhanced flame retardancy, while maintaining or improving the mechanical properties required in the related art. In an effort to provide a composition for the purpose of the present invention through the efforts and studies of each.

The technical problem to be achieved by the present invention is to produce a non-halogen-based insulation and sheath material that does not cause a large change in the mechanical properties required in the prior art, the fire retardant to enhance the flame retardant effect that can exhibit a sufficient flame retardant effect in the event of a fire It is an object of the present invention to provide a composition for producing non-halogen-based insulation and sheath material with improved flame retardancy that can achieve such a technical problem, an insulation material for an electric wire and an insulated wire using the same.

In order to achieve the technical problem to be achieved by the present invention, the composition for producing non-halogen-based insulation and sheath material having improved flame retardancy provided in the present invention includes 50 to 99% by weight of a polyolefin resin and a reactive polyolefin resin 1 having a polar group introduced therein. To 50% by weight of the blended resin is used as the base resin, 100 to 250 parts by weight of the inorganic flame retardant based on 100 parts by weight of the base resin; 30 to 70 parts by weight of flame retardant aids; And 1 to 10 parts by weight of the silicon-based additives.

In order to achieve the technical problem to be achieved by the present invention, the insulating material for electric wire provided in the present invention is characterized by being manufactured using the composition for producing non-halogen-based insulation and sheath material with improved flame retardancy described above.

In order to achieve the technical problem to be achieved by the present invention, the insulated wire provided in the present invention is manufactured by using the above-described insulator for the wire, selected from the general wire, ordinary telephone wire, UTP (Unshieled twisted pair cable) cable and optical cable It is characterized by any one of the insulated wires.

Hereinafter, specific examples will be described in order to help the understanding of the present invention, and in the following case, with reference to the drawings will be described in more detail. However, embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

The unshielded twisted pair (UTP) cable structure used as the communication cable as described above may be more specifically understood through the accompanying drawings and the following description.

FIG. 1 is a cross-sectional view of a category 5 UTP cable 100 having four pairs, and FIG. 2 is a cross-sectional view of a UTP cable 200 of a category 6 having a cross filler 21.

1 and 2, the inside of the UTP cable includes a plurality of pairs 13 in which two conductors 11 are spirally twisted with each other, and the outside thereof has a thickness of 0.5 mm. It is wrapped in 15. At this time. Each conductor 11 consists of a bundle of conductors 17 and an insulating coating layer 19 covering the conductors 17. 1 and 2, the same reference numerals refer to the same member. The insulating coating layer 19 surrounding the bundle of conductors 17 was manufactured by using a high density polyethylene (High Density Polyethylene) resin. The high density polyethylene resin is an excellent dielectric material having a low dielectric capacity, excellent adhesion to a conductor during extrusion, smooth surface roughness, and is suitable for producing an insulating coating layer 19 having a uniform thickness.

The composition for manufacturing a high flame retardant low flame retardant material according to the present invention may be utilized as an insulation and sheath material of wires, and in particular, as various insulation and sheath layers such as general electric wire, general telephone wire, UTP (Unshieled twisted pair cable) cable or optical cable. It may be used, or may be used to manufacture the sheath body 15 in Figs.

As the base resin of the composition for preparing a high flame retardant low flame retardant material according to the present invention, a mixed resin in which 50 to 99% by weight of a polyolefin resin and 1 to 50% by weight of a reactive polyolefin resin having a polar group introduced therein was blended was used. With respect to the numerical range of the blending ratio of the mixed resin, when the lower limit is not reached, the compatibility between the resin and the inorganic flame retardant is lowered, which is not desirable, and when the upper limit is exceeded, the excess polar group is impurity. The long-term stability is lowered at the same time, which is not desirable because it acts as a cost increase factor.

The polyolefin resin contained in the base resin is high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene, ethylene-1 to octene copolymer, ethylene- Commercially available alpha-olefin block copolymers having 3 to 15 carbon atoms, including 1 to butene copolymers, alpha-olefin graft copolymers having 3 to 15 carbon atoms, ethylene vinyl acetate polymers, ethylene acrylate polymers, and ethylene It is preferred if it is a single substance selected from the group consisting of methyl acrylate polymers or a mixture of two or more selected arbitrarily from these.

The reactive polyolefin-based resin having a polar group in the basic resin introduced therein is grafted with maleic anhydride or glycidyl methacrylate to any one selected from the group consisting of polyethylene, ethylene vinyl acetate polymer and ethylene ethyl acrylate polymer. It is preferable if it is a ized material, and the said grafting is more preferable in the ratio of 0.1 to 5 weight%. In relation to the numerical range of the grafting rate, when the lower limit is less than the lower limit, the compatibility decreases, so the physical properties are not preferable, and when the upper limit is exceeded, it is difficult to implement commercially, and thus it is not preferable because it acts as a factor of cost increase. Can not do it.

The inorganic flame retardant included in the composition for producing a high flame retardant low flame retardant material according to the present invention is preferably included in an amount of 100 to 250 parts by weight based on 100 parts by weight of the base resin. Regarding the numerical range of the content of the inorganic flame retardant, it is not preferable to secure flame retardancy if it is less than the lower limit, and if it exceeds the upper limit, the mechanical properties of the product, such as tensile strength or elongation, are lowered. I can't. The inorganic flame retardant is preferably any one selected from magnesium hydroxide and aluminum hydroxide or a mixture thereof. At this time, the magnesium hydroxide or aluminum hydroxide selected as the inorganic flame retardant is more preferable if the surface treatment is any one selected from the group consisting of vinylsilane, fatty acid and amino acid.

The flame retardant aid included in the composition for producing a low flame retardant flame retardant according to the present invention is preferably included in an amount of 30 to 70 parts by weight based on 100 parts by weight of the base resin. Regarding the numerical range of the flame retardant aid content, if it is less than the lower limit, it is not preferable to achieve the purpose of improving the flame retardancy, and when the upper limit is exceeded, the mechanical properties are lowered, which is not preferable. The flame retardant aid is preferably melamine cyanurate, and more preferably melamine cyanurate is any one selected from the group consisting of vinylsilanes, fatty acids and amino acids.

Silicone-based additives included in the low-flammable flame retardant manufacturing composition according to the present invention is preferably included in an amount of 1 to 10 parts by weight based on 100 parts by weight of the base resin. The silicone additive may be combined with an inorganic flame retardant to improve flame retardancy, and also to improve processability by serving as a plasticizer for the silicone additive. In relation to the numerical range of the silicon-based additive content, if the lower limit is not reached, the purpose of the addition is not achieved, which is not preferable, and even if the upper limit is exceeded, a proportional effect on the amount of the addition does not occur, but rather It is not preferable because it acts as a cost increase factor due to material over-injection.

In addition, various additives conventionally used in the cable coating material may be further used in the composition of the present invention within a range that does not impair the effects of the present invention. Examples of such additives include, but are not limited to, antioxidants, UV inhibitors, thermal stabilizers, lubricants, antiblocking agents, antistatic agents, waxes, coupling agents, pigments, processing aids, carbon black, and the like. The wire coating material composition according to the present invention may be prepared by a method known in the art, but is not particularly limited in the method. At this time, it is apparent that kneader, Benbury or open roll can be used. The composition for producing a low-flammable flame retardant according to the present invention may be applied to various kinds of sheath layers, such as wires, telephone lines, cables, buffer layers, insulating layers, and the like, but is not limited thereto.

Example (1-3) and Comparative example (1-4)

Tables 1 and 3 and Comparative Examples (1 to 4) satisfying the conditions according to the present invention according to the ingredients and their respective contents according to Table 1 are separately shown and set. In addition, it is preferable to use the composition of Example 1 as a composition for manufacturing the sheath body 15 of FIG. 1 and FIG. 2 mentioned above.

Classification (Unit: parts by weight) Example (1-3) Comparative example (1-4) One 2 3 One 2 3 4 Resin 60 60 60 80 90 50 60 Resin b 30 30 30 - - 40 30 Resin 5 5 5 10 10 10 5 Resin 5 5 5 10 - - 5 MDH 180 180 180 140 170 180 180 ATH - - - 120 - - - Melamine cyanurate 50 35 50 25 - 20 50 Silicone-based additives 5 5 10 5 10 8 - Zinc borate - - - 5 30 8 - Lubricant One One One One One One One Antioxidant 1.5 1.5 1.5 1.5 1.5 1.5 1.5

In Table 1, resin a is an ethylene vinyl acetate copolymer resin containing 28% by weight of vinyl acetate, resin b is an ethylene-1 to octene copolymer resin, resin c is a low density polyethylene resin into which maleic anhydride is introduced, Resin d is an ethylene vinyl acetate copolymer resin into which maleic anhydride is introduced. MDH stands for magnesium hydroxide, ATH stands for aluminum trihydroxide and was used as a flame retardant. Zinc borate is a material used as a flame retardant aid, but was not used in Examples 1 to 3 according to the present invention. On the other hand, polyethylene wax was used as a lubricant, and Iganox 1010 was used as an antioxidant.

Preparation of the test material

Each of the compositions according to Examples 1 to 3 and Comparative Examples 1 to 4 separately set according to Table 1 was kneaded in an open roll, and then molded at 170 ° C. for 10 minutes to prepare test specimens as insulating materials. On the other hand, using the compositions according to Examples (1-3) and Comparative Examples (1-4) set according to the above Table 1, was applied to the UTP cable sheath of the structure as shown in Figure 1 to prepare a cable. At this time, the sheath thickness of the UTP cable is preferably manufactured to 0.3 to 2 mm, but was prepared to have a thickness of 0.5 mm for the test.

Property evaluation

For each of the test specimens manufactured as described above, room temperature, heat resistance, and flame retardant properties were measured. In the process of manufacturing the UTP cable manufactured as described above, die dregs during load and extrusion occurred during processing (Die The results of evaluating the properties according to each evaluation item by observing the build-up) are shown in Table 2 below.

(1) Room temperature characteristic

The room temperature characteristics were measured for tensile strength and elongation at room temperature according to UL444 standards. According to the UL444 standard, the tensile strength at room temperature should be 0.92 kgf / mm 2 or more and the elongation rate should be 100% or more, respectively, to evaluate the suitability at room temperature.

(2) flame retardant properties

The flame retardant properties were evaluated as passing when tested according to the CM class flame retardant test (IEC 60332-3).

(3) Load at the time of processing

In the case of processing, each of the composition materials is kneaded at 150 rpm at 30 rpm for 10 minutes using a 315 cc capacity haake mixer. Was evaluated.

(4) die built up evaluation

The evaluation of die built-up was carried out by the presence and the amount of debris generated around the die during the extrusion of the cable by using the respective composition materials. When one quantity occurred, it evaluated as favorable.

division standard Example (1-3) Comparative example (1-4) One 2 3 One 2 3 4 Tensile Strength (㎏f / ㎠) 0.92 or more 1.2 1.23 1.14 1.49 1.14 1.36 1.25 Elongation (%) More than 100 140 140 132 66 116 125 150 Flame retardant test (IEC 60332-3) - pass pass pass pass fail fail pass Load during processing (Nm) 80 or less 76 75 76 102 86 87 73 Die build-up - Good Good Good Bad Good Good Bad

As can be seen through the results shown in Table 2, in the case of all of the embodiments (1 to 3) according to the present invention, the tensile strength and elongation of the room temperature characteristics, flame retardant test, all the load and die built up during processing It can be seen that satisfactory results are obtained by satisfying the reference conditions required by the item.

On the contrary, in the case of Comparative Example 1, the elongation rate is significantly lower than the reference value, the load at the time of processing is too high, and it is not preferable because it is evaluated as poor in the evaluation of die built-up, and in each of Comparative Examples 2 and 3 It failed in the evaluation of flame retardancy, and the load during processing was measured to be slightly higher than the reference value, which is not preferable. In Comparative Example 4, although it was evaluated as good in most of the evaluation items, it was evaluated as bad in the evaluation of the die built up and was not preferable. It can be seen.

Optimal embodiments of the present invention described above have been disclosed. Although specific terms have been used herein, they are used only for the purpose of describing the present invention in detail to those skilled in the art, and are not used to limit the scope of the present invention as defined in the meaning or claims.

According to the present invention, while producing a non-halogen-based insulation and sheath material that does not significantly affect the mechanical properties of the various wires required in the prior art, by improving the flame retardancy of the conventional non-halogen-based insulation and the sheath material, etc. It is preferable to have sufficient resistance against. On the other hand, by using the composition according to the present invention, various insulation and sheath layers, such as wire insulation and sheath material, such as general electric wire, ordinary telephone wire, UTP (Unshieled twisted pair cable) cable or optical cable, which is installed in a facility vulnerable to fire There is an advantage that can be used in various ways.

Claims (10)

50 to 99% by weight of polyolefin resin and 1 to 50% by weight of a reactive polyolefin resin having a polar group introduced therein are used as the base resin, For 100 parts by weight of the base resin, 100 to 250 parts by weight of an inorganic flame retardant; 30 to 70 parts by weight of flame retardant aids; And 1 to 10 parts by weight of a silicone-based additive; composition for producing non-halogen-based insulation and sheath material with improved flame resistance characterized in that it comprises a. The method of claim 1, The polyolefin resin contained in the base resin is high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene, ethylene-1 to octene copolymer, ethylene- Group of substances consisting of 1 to butene copolymer, alpha olefin block copolymer having 3 to 15 carbon atoms, alpha olefin graft copolymer having 3 to 15 carbon atoms, ethylene vinyl acetate polymer, ethylene acrylate polymer, and ethylene methyl acrylate polymer Any one selected from or a mixture of two or more selected from these, The reactive polyolefin-based resin having a polar group in the basic resin introduced therein is grafted with maleic anhydride or glycidyl methacrylate to any one selected from the group consisting of polyethylene, ethylene vinyl acetate polymer and ethylene ethyl acrylate polymer. Non-halogen-based insulation and sheath material manufacturing composition with improved flame resistance, characterized in that the materialized. The method of claim 2, Reactive polyolefin-based resin in which the polar group is introduced, the composition for producing non-halogen-based insulation and sheath material with improved flame retardancy, characterized in that the grafted at a ratio of 0.1 to 5% by weight. The method of claim 1, The inorganic flame retardant is any one selected from magnesium hydroxide and aluminum hydroxide, or a mixture of two, and the surface of the inorganic flame retardant is any one selected from the group consisting of vinylsilanes, fatty acids and amino acids, the surface of which is treated. A non-halogen-based insulation and sheath material composition for improving flame retardancy, The method of claim 1, The flame retardant aid for the production of non-halogen-based insulation and sheath material with improved flame retardancy, characterized in that the surface is a melamine cyanurate surface treated as any one material selected from the group consisting of vinylsilane, fatty acids and amino acids. Composition. An insulating material for electric wires, which is manufactured using a composition for producing non-halogen-based insulation and sheath material having improved high flame retardancy according to any one of claims 1 to 5. Insulated wire, characterized in that the insulated wire of any one selected from the general electric wire, ordinary telephone wire, UTP (Unshieled twisted pair cable) cable and optical cable manufactured using the insulation material for electric wire according to claim 6. delete delete delete

Images