CN115651305A - High-strength halogen-free flame-retardant optical cable sheath material - Google Patents
High-strength halogen-free flame-retardant optical cable sheath material Download PDFInfo
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- CN115651305A CN115651305A CN202211449225.6A CN202211449225A CN115651305A CN 115651305 A CN115651305 A CN 115651305A CN 202211449225 A CN202211449225 A CN 202211449225A CN 115651305 A CN115651305 A CN 115651305A
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Abstract
The invention discloses a high-strength halogen-free flame-retardant optical cable sheath material, belonging to the field of low-smoke halogen-free flame-retardant sheath materials, and the sheath material comprises the following components in parts by weight: 15-30 parts of base resin, 50-70 parts of flame retardant, 0.1-1.1 parts of lubricant, 2-6 parts of compatilizer and 1-2 parts of colorant; the flame retardant adopts the nano quartz, the components of the nano quartz, which are close to montmorillonite and exceed 50 percent, are SiO2, the particle size of the nano quartz is 0.01-0.1um, and the nano quartz has small-size effect, quantum size effect, surface effect, macroscopic quantum effect and the like, and is applied to the preparation of the sheath material, so that the strength of the cable sheath material is improved, and the flame retardant property of the sheath material can be greatly improved.
Description
Technical Field
The invention relates to the field of low-smoke halogen-free flame-retardant sheath materials, in particular to a high-strength halogen-free flame-retardant optical cable sheath material.
Background
Low smoke zero halogen (Low smoke zero halogen), abbreviated as LSZH, LSOH, LS0H, LSFH, and OHLS, is a material classification of wire sheaths in the wire and cable industry. The low-smoke halogen-free wire sheath is composed of thermoplastic or thermosetting materials which have low smoke discharge amount and do not contain halogen when being heated. Most of the network wire coating layers are composed of polyethylene, polyvinyl chloride or thermoplastic polyurethane. When a fire occurs, the chlorine-containing plastics release toxic hydrogen chloride, and hydrochloric acid is generated if water is encountered. And the low-smoke halogen-free material does not release hydrogen halide or other acids in case of fire. The low-smoke halogen-free material can reduce toxic and corrosive gases generated during combustion. In the environment with poor ventilation such as airplanes, train carriages or ships, the outer layer of the wire and cable is required to be made of low-smoke halogen-free materials.
The type of optical cable changes along with the change of sheath material variety, adopt low smoke and zero halogen to hinder fuel if the sheath material, then this kind of optical cable just is called low smoke and zero halogen fire-retardant optical cable, along with people more and more attach importance to the nontoxic factor of environmental protection, low smoke and zero halogen sheath material occupies the market gradually, accomplish cigarette little when taking place the conflagration, it is nontoxic, characteristics such as fire-retardant, along with the development of cable industry, the demand of sheath material crescent, how in the same time, improve the production efficiency of sheath material, accelerate the extrusion speed of sheath material, design novel high strength halogen-free fire-retardant optical cable sheath material, gain economic benefits's maximize, the target that has become every enterprise.
Disclosure of Invention
The invention aims to provide a high-strength halogen-free flame-retardant optical cable sheath material.
The technical scheme of the invention is as follows: the high-strength halogen-free flame-retardant optical cable sheath material comprises the following components in parts by weight:
15-30 parts of base resin
50-70 parts of flame retardant
0.1 to 1.1 portions of lubricant
2-6 parts of compatilizer
1-2 parts of a coloring agent;
wherein the base resin comprises the following components: ethylene-vinyl acetate copolymer, ethylene-octene copolymer, polyethylene; the flame retardant is one of magnesium hydroxide, organic modified montmorillonite and nano quartz; the lubricant is silicone oil; the compatilizer is maleic anhydride functional polyolefin; the colorant is a color master batch. In a preferred embodiment, the ratio of parts of ethylene-vinyl acetate copolymer to ethylene-octene copolymer to polyethylene is 1.3 to 0.6; the melt flow rate of the ethylene-vinyl acetate copolymer is 4.0-5.0, and the VA content is 20-30% by adopting ASTM-1238; the ethylene-octene copolymer has a melt flow rate of 6.0 to 8.0.
In a preferred embodiment, the flame retardant is nano quartz, the particle size of the nano quartz is 0.01-0.1um, and the grafting rate of the compatilizer is 2-2.5%.
A preparation method of a high-strength halogen-free flame-retardant optical cable sheath material comprises the following steps:
(1) Mixing the base resin, the compatilizer, the lubricant, the colorant and the flame retardant in a high-speed mixer for 5-10min according to the proportion;
(2) Conveying the materials from the high-speed mixer to an internal mixer, and internally mixing for 10-15min in the internal mixer, wherein the temperature of a bottom groove is 135-150 ℃, and the temperature of an upper groove is 125-135 ℃;
(3) And conveying the materials after banburying to a feeder, and performing extrusion granulation by using a double-screw extruder or a single-screw extruder, wherein the set temperature of the double-screw extruder is 110-130 ℃, and the set temperature of the single-screw extruder is 120-135 ℃.
The invention has the beneficial effects that: the base resin is an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer and a polyethylene blend, and because the ethylene-vinyl acetate copolymer and the ethylene-octene copolymer are more than the weight parts of the polyethylene, and three groups all have ethylene groups, the ethylene-vinyl acetate copolymer and the ethylene-octene copolymer have better compatibility, the ethylene-vinyl acetate copolymer and the ethylene-octene copolymer have strong toughening effect on the polyethylene, and the capability of the polyethylene of bearing external force and solvent action to crack is enhanced; the octene group has good fluidity, and the product fluidity is increased along with the increase of the octene group; the flame retardant has uniform particle size and strong fluidity, has small size effect, quantum size effect, surface effect, macroscopic quantum effect and the like, is applied to the preparation of the sheath material, improves the strength of the cable sheath material, and can greatly improve the flame retardant property of the sheath material.
Detailed Description
The invention will be further illustrated and understood by the following non-limiting examples.
The invention provides a high-strength halogen-free flame-retardant optical cable sheath material, which comprises the following components in parts by weight:
15-30 parts of base resin
50-70 parts of flame retardant
0.1 to 1.1 portions of lubricant
2-6 parts of compatilizer
1-2 parts of a coloring agent;
in one embodiment of the present invention, the base resin comprises the following components: ethylene-vinyl acetate copolymer, ethylene-octene copolymer, polyethylene, the ratio of the parts of ethylene-vinyl acetate copolymer to ethylene-octene copolymer to polyethylene being 1.3-0.6;
the flame retardant is one of magnesium hydroxide, organic modified montmorillonite and nano quartz;
the lubricant is silicone oil; the compatilizer is maleic anhydride functional polyolefin; the colorant is color master batch.
In a preferred embodiment, the ethylene-vinyl acetate copolymer has a melt flow rate of 4.0 to 5.0 and a VA content of 20 to 30% as measured by ASTM-1238; the ethylene-octene copolymer has a melt flow rate of 6.0-8.0. The flame retardant is nano quartz, the particle size of the nano quartz is 0.01-0.1um, and the grafting rate of the compatilizer is 2-2.5%.
Examples 1 to 5
A preparation method of a high-strength halogen-free flame-retardant optical cable sheath material comprises the following steps:
(1) Mixing base resin, compatilizer, lubricant, colorant and flame retardant in a high-speed mixer for 5-10min according to the proportion shown in table 1;
(2) Conveying the materials from the high-speed mixer to an internal mixer, and internally mixing for 10-15min in the internal mixer, wherein the temperature of a bottom groove is 135-150 ℃, and the temperature of an upper groove is 125-135 ℃;
(3) And conveying the materials after banburying to a feeder, and performing extrusion granulation by using a double-screw extruder or a single-screw extruder, wherein the set temperature of the double-screw extruder is 110-130 ℃, and the set temperature of the single-screw extruder is 120-135 ℃.
Table 1, in which the ethylene-vinyl acetate copolymer has a melt flow rate of 4.0 to 5.0 and a VA content of 26% as measured by ASTM-1238; the ethylene-octene copolymer has a melt flow rate of 6.0 to 7.0. The grain diameter of the nano quartz is 0.01-0.1um, and the grafting rate of the compatilizer is 2-2.5%.
When the sheath material provided by the embodiments 1 to 5 is used for manufacturing optical cables, the extrusion speed is high, can reach 260m/min, is improved by more than 3 times compared with 80m/min of common production, greatly increases the production efficiency, increases the yield, reduces the energy consumption, and has great application potential.
The prepared product has various performances exceeding the national standard through detection, and completely meets the use requirements of enterprises. The indexes of detection are shown in table 2.
TABLE 2
The base resin is an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer and a polyethylene blend, and because the ethylene-vinyl acetate copolymer and the ethylene-octene copolymer are more than the weight parts of the polyethylene, and three groups all have ethylene groups, the ethylene-vinyl acetate copolymer and the ethylene-octene copolymer have better compatibility, the ethylene-vinyl acetate copolymer and the ethylene-octene copolymer have strong toughening effect on the polyethylene, and the capability of the polyethylene of bearing external force and solvent action to crack is enhanced; the octene group has good fluidity, and the product fluidity is increased along with the increase of the octene group; the flame retardant has uniform particle size and strong fluidity, if the components of the nano quartz are similar to montmorillonite, more than 50 percent of the components in the nano quartz are SiO2, the particle size of the nano quartz is 0.01-0.1um, and the nano quartz has small-size effect, quantum size effect, indication effect, macroscopic quantum effect and the like, and is applied to the preparation of the sheath material, so that the strength of the cable sheath material is improved, and the flame retardant property of the sheath material can be greatly improved.
Claims (4)
1. The high-strength halogen-free flame-retardant optical cable sheath material is characterized by comprising the following components in parts by weight:
15-30 parts of base resin
50-70 parts of flame retardant
0.1 to 1.1 portions of lubricant
2-6 parts of compatilizer
1-2 parts of a coloring agent;
wherein the base resin comprises the following components: ethylene-vinyl acetate copolymer, ethylene-octene copolymer, polyethylene; the flame retardant is one of magnesium hydroxide, organic modified montmorillonite and nano quartz; the lubricant is silicone oil; the compatilizer is maleic anhydride functional polyolefin; the colorant is a color master batch.
2. The sheath material of claim 1, wherein the ratio of the ethylene-vinyl acetate copolymer to the ethylene-octene copolymer to the polyethylene in parts is 1.3-0.6; the melt flow rate of the ethylene-vinyl acetate copolymer is 4.0-5.0, and the VA content is 20-30% by adopting ASTM-1238 test; the ethylene-octene copolymer has a melt flow rate of 6.0-8.0.
3. The high-strength halogen-free flame-retardant optical cable sheathing compound as claimed in claim 1, wherein the flame retardant is nano quartz, the particle size of the nano quartz is 0.01-0.1um, and the grafting ratio of the compatibilizer is 2-2.5%.
4. The preparation method of the high-strength halogen-free flame-retardant optical cable sheath material according to any one of claims 1 to 3, characterized by comprising the following steps:
(1) Mixing the base resin, the compatilizer, the lubricant, the colorant and the flame retardant in a high-speed mixer for 5-10min according to the proportion;
(2) Conveying the materials from the high-speed mixer to an internal mixer, and internally mixing for 10-15min in the internal mixer, wherein the bottom groove temperature is 135-150 ℃, and the upper groove temperature is 125-135 ℃;
(3) And conveying the internally mixed materials to a feeder, and performing extrusion granulation by using a double-screw extruder or a single-screw extruder, wherein the set temperature of the double-screw extruder is 110-130 ℃, and the set temperature of the single-screw extruder is 120-135 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449225.6A CN115651305A (en) | 2022-11-18 | 2022-11-18 | High-strength halogen-free flame-retardant optical cable sheath material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211449225.6A CN115651305A (en) | 2022-11-18 | 2022-11-18 | High-strength halogen-free flame-retardant optical cable sheath material |
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| CN115651305A true CN115651305A (en) | 2023-01-31 |
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| CN202211449225.6A Pending CN115651305A (en) | 2022-11-18 | 2022-11-18 | High-strength halogen-free flame-retardant optical cable sheath material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012164607A (en) * | 2011-02-09 | 2012-08-30 | Furukawa Electric Co Ltd:The | Flame-retardant cable |
| CN104364309A (en) * | 2012-07-09 | 2015-02-18 | 古河电气工业株式会社 | Non-halogen flame-retardant resin composition and insulated wire/cable having non-halogen flame-retardant resin composition |
| CN104448519A (en) * | 2014-11-17 | 2015-03-25 | 上海新上化高分子材料有限公司 | High-oxygen-index thermoplastic halogen-free flame retardant polyolefin cable material and preparation method thereof |
| CN106566059A (en) * | 2016-09-29 | 2017-04-19 | 中广核三角洲（苏州）新材料研发有限公司 | Low-smoke zero-halogen flame-retardant jacket material for irradiation-resisting nuclear grade cable |
| CN112812439A (en) * | 2021-01-31 | 2021-05-18 | 天津市恒宇磁塑制品有限公司 | Preparation method of high-flame-retardant material for polyester gauze |
| CN113214561A (en) * | 2021-05-24 | 2021-08-06 | 江苏馨德高分子材料股份有限公司 | Low-smoke halogen-free intumescent flame-retardant optical cable sheath material and preparation method thereof |
-
2022
- 2022-11-18 CN CN202211449225.6A patent/CN115651305A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012164607A (en) * | 2011-02-09 | 2012-08-30 | Furukawa Electric Co Ltd:The | Flame-retardant cable |
| CN104364309A (en) * | 2012-07-09 | 2015-02-18 | 古河电气工业株式会社 | Non-halogen flame-retardant resin composition and insulated wire/cable having non-halogen flame-retardant resin composition |
| CN104448519A (en) * | 2014-11-17 | 2015-03-25 | 上海新上化高分子材料有限公司 | High-oxygen-index thermoplastic halogen-free flame retardant polyolefin cable material and preparation method thereof |
| CN106566059A (en) * | 2016-09-29 | 2017-04-19 | 中广核三角洲（苏州）新材料研发有限公司 | Low-smoke zero-halogen flame-retardant jacket material for irradiation-resisting nuclear grade cable |
| CN112812439A (en) * | 2021-01-31 | 2021-05-18 | 天津市恒宇磁塑制品有限公司 | Preparation method of high-flame-retardant material for polyester gauze |
| CN113214561A (en) * | 2021-05-24 | 2021-08-06 | 江苏馨德高分子材料股份有限公司 | Low-smoke halogen-free intumescent flame-retardant optical cable sheath material and preparation method thereof |
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