CN110735208A - Industrial production method of neutron radiation protection fiber materials - Google Patents
Industrial production method of neutron radiation protection fiber materials Download PDFInfo
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- CN110735208A CN110735208A CN201910828134.5A CN201910828134A CN110735208A CN 110735208 A CN110735208 A CN 110735208A CN 201910828134 A CN201910828134 A CN 201910828134A CN 110735208 A CN110735208 A CN 110735208A
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- 230000005855 radiation Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002657 fibrous material Substances 0.000 title claims abstract description 12
- 238000009776 industrial production Methods 0.000 title claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 45
- 229920002292 Nylon 6 Polymers 0.000 claims abstract description 38
- ZOXJGFHDIHLPTG-BJUDXGSMSA-N Boron-10 Chemical compound [10B] ZOXJGFHDIHLPTG-BJUDXGSMSA-N 0.000 claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 33
- 239000002243 precursor Substances 0.000 claims abstract description 25
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 19
- 239000004917 carbon fiber Substances 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000009987 spinning Methods 0.000 claims abstract description 11
- 229910052580 B4C Inorganic materials 0.000 claims description 37
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 31
- 239000003963 antioxidant agent Substances 0.000 claims description 13
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- 239000002759 woven fabric Substances 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000009941 weaving Methods 0.000 claims description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000004744 fabric Substances 0.000 description 22
- 239000000463 material Substances 0.000 description 10
- 230000001681 protective effect Effects 0.000 description 8
- 239000002131 composite material Substances 0.000 description 7
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 6
- 229910052796 boron Inorganic materials 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 238000009837 dry grinding Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000012943 hotmelt Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229910000712 Boron steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- FGUJWQZQKHUJMW-UHFFFAOYSA-N [AlH3].[B] Chemical compound [AlH3].[B] FGUJWQZQKHUJMW-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
- D03D1/0035—Protective fabrics
- D03D1/0058—Electromagnetic radiation resistant
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
- D03D15/247—Mineral
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
Abstract
an industrial production method of neutron radiation protection fiber material relates to a production method of neutron radiation protection fiber material, which is invented mainly for solving the problems of weak neutron radiation protection capability and insufficient fiber strength of the existing neutron radiation protection fiber material, the raw material nylon-6 slice, boron-10-enriched carbide and antioxidant 1010 are added into a mixing kettle, are uniformly mixed and then enter a screw extruder to be melted and extruded, and then are spun from a spinneret plate, cooled and drafted by air flow, wound, and then are subjected to tube spinning, winding, doubling and twisting to obtain the blending melt-spun precursor fiber, the blending melt-spun precursor fiber and the carbon fiber are twisted and plied with each other, and then are subjected to winding, warping and warp-threading to form warp yarns.
Description
The technical field is as follows:
the invention relates to a production method of fiber materials for protecting neutron radiation.
The application of nuclear science and technology has been deepened into various fields of nuclear powered ships, aerospace, medical radiology, food processing, nondestructive testing, nuclear engineering, agriculture, biomedicine and the like which concern national safety and national civilization and become indispensable components of modern society, X rays, gamma rays, neutron rays and the like generated by nuclear radiation not only can cause new environmental pollution (nuclear pollution) but also can seriously harm the health and safety of human bodies, and in high-energy rays of nuclear radiation, the harm of the neutron rays is the greatest, so the protection of the neutron rays is very important.
The application shows that the traditional single neutron shielding structure material has many disadvantages and is difficult to meet the protection requirement of a special structure, the selection of the polymer and the neutron absorber can directly influence the shielding performance of the protective material, the thermal neutron absorption cross section of boron-10 is 3837 targets, which is more than 50 times of that of the concrete neutron protective material, the protective material containing boron-10 usually exists in the form of boron, borate or boron carbide, and because of the high boron content, excellent physical and chemical properties of boron carbide, radioactive isotopes generated in the middle of the application engineering, the secondary ray energy is low, the boron resource is rich, the boron carbide waste is easy to treat, so the boron carbide is widely used as the nuclear neutron protective material.
Research and application show that lead as a neutron shielding material is toxic and high in density, mainly protects gamma rays and has a less ideal neutron shielding effect; the concrete protective material occupies a larger space and is not easy to move in the using process; boron-aluminum alloy and boron steel can improve the protective performance by increasing the boron content, but also can reduce the structural strength of the composite material. The chromium rod has excellent ray absorption performance and mechanical performance, but the chromium rod is high in price and can generate secondary rays.
kinds of paint which uses 793 resin as curing agent and can shield and absorb neutron radiation is prepared by Huangyi ping et al, but the toughness is not good, so that the special structure protection requirement can not be met.
kinds of B's are made up by Chaihao et al4The C/SEBS neutron shielding composite material has the comprehensive performance of .
Studies have shown that polyethylene materials are easily softened and melted at high temperatures and are highly likely to have severe neutron leak incidents. The flexible polyethylene protective material can release secondary gamma rays after capturing thermal neutrons, so that the capability of absorbing the thermal neutrons is reduced to a great extent, the temperature application range is narrow, the service life is short, and the replacement frequency is high.
The boron/polymethyl methacrylate composite material has strong neutron shielding capability, but short service life. The boron carbide/phenolic resin composite material needs a considerable thickness to meet the protection requirement, and the application range of the material is limited.
In the polypropylene/boron carbide blending system of Wangchun scholar and the like, 40% of boron carbide micro powder is added, the using amount of titanate as an auxiliary agent is 1.5-2.5%, the core material blending is subjected to composite spinning, the breaking strength of the obtained fiber is 2.06cN/dtex, the breaking elongation is 37%, the hot melting temperature is 163 ℃, and the non-woven fabric prepared from the fiber has -determined shielding effect on neutrons.
The domestic patent adopts the blending of boron, heavy metal compound and polypropylene, and then melt spinning to prepare the core-sheath type anti-neutron and X-ray fiber with the boron carbide content of 35 percent. The fiber strength is 2327cN/tex, the breaking elongation is 20-40%, and the fiber is processed into knitted fabric, woven fabric and non-woven fabric for the periphery of an atomic energy reactor, so that the neutron radiation protection shielding rate can reach more than 44%. But also has the problems of low neutron radiation protection shielding rate, insufficient fiber strength and low temperature resistance.
The invention content is as follows:
the invention aims to solve the technical problem of providing industrial production methods of fiber materials capable of protecting neutron radiation, which have strong neutron absorption capacity and high neutron radiation protection shielding rate.
The above object is achieved by: the boron-10-enriched boron carbide, nylon-6 slices and an antioxidant are blended and melt-spun to prepare 100dtex-200 dtex protofilament fiber with the boron carbide content of 30% -35% (the boron-10 content is 23.07% -26.92%). The blended melt-spun precursor fiber and MH300-3K carbon fiber are stranded and twisted with each other to form warp, the blended melt-spun precursor fiber is doubled and twisted to form weft, and the warp and the weft are woven to form the high-performance cloth capable of protecting against neutron and X-ray radiation.
The specific method comprises the following steps:
, slicing nylon-6 (PA-6) and carbonizing the enriched boron-10Boron (C)10B4C) Adding the antioxidant 1010 into a mixing kettle, uniformly mixing, then feeding into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by air flow, winding by cop, spooling, doubling, twisting to obtain blended melt-spun precursor fibers, mutually twisting and stranding the blended melt-spun precursor fibers and carbon fibers, and then spooling, warping, and tying to form warps.
Secondly, the weft adopts blended melt-spun raw silk fibers the same as the warp, namely raw material nylon-6 (PA-6) is sliced and boron-10 boron carbide (B) is enriched10B4C) Adding the antioxidant 1010 into a mixing kettle, uniformly mixing, then feeding into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by airflow, winding, and then feeding into the processes of doubling, twisting and winding to form weft.
And thirdly, weaving the warps and the wefts through a loom to obtain the high-performance woven fabric capable of preventing neutron and X-ray radiation.
The nylon-6 chip is a conventional industrial product purchased from the market, has the relative viscosity of 1.7686 η r/dl/g and the melting temperature of 221.7 ℃, and is enriched with boron-10 boron carbide (B)10B4C) Boron-10 abundance of over 96, particle size distribution of 0.5-40 microns, added10B4The weight ratio of C to nylon-6 is as follows:
10B4c: nylon-6 = 30-35: 100;
the antioxidant 1010 is high molecular weight hindered phenol antioxidants with chemical name of [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (molecular formula: C)73H108O12) The weight ratio of the antioxidant to the nylon-6 slice is as follows:
antioxidant: nylon-6 chip = 0.1-0.5: 100, respectively;
the mixing kettle is a stainless steel container with stirring.
The middle temperature of the screw extruder is 600-610 ℃, and the tail temperature is 585-595 ℃. The specification of the protofilament spun by the spinneret plate is 100dtex-200 dtex.
The blended melt-spun precursor fiber and the carbon fiber are twisted with each other during the production of the warp, so as to increase the strength of the warp, namely 1 blended melt-spun precursor fiber is twisted with each other corresponding to 1 carbon fiber.
The carbon fiber is made of MH300-3K brand, the tensile strength is more than or equal to 3500MPa, the elongation at break is more than or equal to 1.5 percent, and the linear density is 198 +/-2 g/1000 m.
The weft is different from the warp in that the weft is directly formed by blending melt-spun precursor fibers and is not doped with carbon fibers.
The cloth woven by the warps and the wefts has a boron-10 content of 23.07-26.92%, has strong neutron absorption capacity, is processed into knitted fabrics or woven fabrics with the thickness of 0.4 mm-0.6 mm and is used around an atomic energy reactor, the neutron radiation protection shielding rate can reach 98.5-99.5%, and the neutron quantity is lower than the environmental level; carrying out high-speed transformation on the fabric according to the following steps of carrying out; the paint has excellent flexibility, and the Shore hardness is 6.5HD-7.0 HD; the breaking strength of the fiber is 7.26cN/dtex-7.83 cN/dtex; the exercise elongation is 40-42%, and the hot melting temperature is 343-347 ℃.
The invention has the advantages that: the enriched boron-10 boron carbide, nylon-6 slices and antioxidant 1010 are blended and melt-spun to prepare 100dtex-200 dtex protofilament fiber with the boron carbide content of 30-35 percent (the boron-10 content is 23.07-26.92 percent). The 100dtex-200 dtex protofilament fiber and the domestic MH300-3K carbon fiber are stranded and twisted to form a warp, the 100dtex-200 dtex protofilament fiber is doubled and twisted to form a weft, and the warp and the weft are woven to form the high-performance cloth. The cloth has strong neutron absorption capacity, is processed into knitted fabric or woven fabric with the thickness of 0.4-0.6 mm and is used for the periphery of an atomic energy reactor, the neutron radiation protection shielding rate can reach 98.5-99.5%, and the neutron quantity is lower than the environmental level; the high-flexibility polyurethane composite material has excellent flexibility, the Shore hardness is 6.5HD-7.0HD, the cutting performance is excellent, and the high-flexibility polyurethane composite material can be used for producing various protective clothing and covers; carrying out high-speed cultivation on the fabric with the density of 1.25/cm-1.29/cm, wherein the low density facilitates movement, and the breaking strength of the fiber is 7.26cN/dtex-7.83 cN/dtex; the exercise elongation is 40-42%, the hot melting temperature is 343-347 ℃, the thermal property is excellent, and the protection requirement of a special structure can be met.
The specific implementation mode is as follows:
the boron-10-enriched boron carbide, nylon-6 slices and an antioxidant are blended and melt-spun to prepare 100dtex-200 dtex protofilament fiber with the boron carbide content of 30% -35% (the boron-10 content is 23.07% -26.92%). The blended melt-spun precursor fiber and MH300-3K carbon fiber are stranded and twisted with each other to form warp, the blended melt-spun precursor fiber is doubled and twisted to form weft, and the warp and the weft are woven to form the high-performance cloth capable of protecting against neutron and X-ray radiation.
The specific method comprises the following steps:
, slicing nylon-6 (PA-6) and enriching boron-10 boron carbide10B4C) Adding the antioxidant 1010 into a mixing kettle, uniformly mixing, then feeding into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by air flow, winding by cop, spooling, doubling, twisting to obtain blended melt-spun precursor fibers, mutually twisting and stranding the blended melt-spun precursor fibers and carbon fibers, and then spooling, warping, and tying to form warps.
Secondly, the weft adopts blended melt-spun raw silk fibers the same as the warp, namely raw material nylon-6 (PA-6) is sliced and boron-10 boron carbide (B) is enriched10B4C) Adding the antioxidant 1010 into a mixing kettle, uniformly mixing, then feeding into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by airflow, winding, and then feeding into the processes of doubling, twisting and winding to form weft.
And thirdly, weaving the warps and the wefts through a loom to obtain the high-performance woven fabric capable of preventing neutron and X-ray radiation.
The nylon-6 chip is a conventional industrial product purchased from the market, has the relative viscosity of 1.7686 η r/dl/g and the melting temperature of 221.7 ℃, and is enriched with boron-10 boron carbide (B)10B4C) Boron-10 abundance of over 96, particle size distribution of 0.5-40 microns, added10B4The weight ratio of the C to the nylon-6 slices is as follows:
10B4c: nylon-6 chip = 30-35: 100;
the antioxidant 1010 is high molecular weight hindered phenol antioxidantsThe oxygen agent has the chemical name of [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (molecular formula: C)73H108O12) The weight ratio of the antioxidant to the nylon-6 slice is as follows:
antioxidant: nylon-6 chip = 0.1-0.5: 100, respectively;
the mixing kettle is a stainless steel container with stirring.
The middle temperature of the screw extruder is 600-610 ℃, and the tail temperature is 585-595 ℃. The specification of the protofilament spun by the spinneret plate is 100dtex-200 dtex.
The blended melt-spun precursor fiber and the carbon fiber are twisted with each other during the production of the warp, so as to increase the strength of the warp, namely 1 blended melt-spun precursor fiber is twisted with each other corresponding to 1 carbon fiber.
The carbon fiber is made of MH300-3K brand, the tensile strength is more than or equal to 3500MPa, the elongation at break is more than or equal to 1.5 percent, and the linear density is 198 +/-2 g/1000 m.
The weft is different from the warp in that the weft is directly formed by blending melt-spun precursor fibers and is not doped with carbon fibers.
The cloth woven by the warps and the wefts has the boron-10 content of 23.07-26.92%, has strong neutron absorption capacity, is processed into knitted fabric or woven fabric with the thickness of 0.4-0.6 mm and is used for the periphery of an atomic energy reactor, the neutron radiation protection shielding rate can reach 98.5-99.5%, and the neutron quantity is lower than the environmental level; carrying out high-speed transformation on the fabric according to the following steps of carrying out; the paint has excellent flexibility, and the Shore hardness is 6.5HD-7.0 HD; the breaking strength of the fiber is 7.26cN/dtex-7.83 cN/dtex; the exercise elongation is 40-42%, and the hot melting temperature is 343-347 ℃.
Example 1, raw material nylon-6 chips, boron-10-enriched boron carbide and antioxidant 1010 were added into a mixing kettle, and after mixing uniformly, they were fed into a screw extruder to melt and extrude, and then metered by a metering pump, spun from a spinneret, cooled and drafted by air flow, wound, and then spun-spun blend precursor fiber was obtained by cop, spooling, doubling, twisting, and intertwisting, and then 1 spun-spun blend precursor fiber and 1 carbon fiber were twisted and plied, and finally, warp was formed by spooling, beaming, and warp-threading.
Adding raw materials of nylon-6 slices, boron-10-enriched boron carbide and an antioxidant 1010 into a mixing kettle, uniformly mixing, then putting into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by airflow, winding, and then carrying out doubling, twisting and weft winding processes to form weft.
The weight ratio of the enriched boron-10 boron carbide to the nylon-6 slices is 35: 100; the weight ratio of the antioxidant to the nylon-6 chip is 0.4: 100, respectively;
the middle temperature of the screw extruder is 610 ℃, and the tail temperature of the screw extruder is 595 ℃.
The cloth woven by the warps and the wefts has the boron-10 content of 26.9 percent and the neutron radiation protection shielding rate of 99 percent; carrying out high speed dry milling on the fabric according to the standard of the Shore hardness, wherein the density of the fabric is 1.28 g/cm, and the Shore hardness is 6.85 HD; the breaking strength of the fiber is 7.46 cN/dtex; the exercise elongation was 41% and the hot melt temperature was 345 ℃.
Example 2, raw material nylon-6 chips, boron-10-enriched boron carbide and antioxidant 1010 are added into a mixing kettle, mixed uniformly and then fed into a screw extruder to be melt-extruded, metered by a metering pump, spun from a spinneret, cooled and drafted by air flow, wound, and subjected to cop winding, spooling, doubling and twisting to obtain blended melt-spun precursor fibers, wherein 1 piece of blended melt-spun precursor fiber and 1 piece of carbon fiber are twisted and stranded with each other, and then subjected to spooling, beaming and warp-threading to form warp threads.
Adding raw materials of nylon-6 slices, boron-10-enriched boron carbide and an antioxidant 1010 into a mixing kettle, uniformly mixing, then putting into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by airflow, winding, and then carrying out doubling, twisting and weft winding processes to form weft.
The weight ratio of the enriched boron-10 boron carbide to the nylon-6 slices is 30: 100; the weight ratio of the antioxidant to the nylon-6 slice is 0.1: 100, respectively;
the middle temperature of the screw extruder is 605 ℃, and the tail temperature of the screw extruder is 590 ℃.
The cloth woven by the warps and the wefts has the boron-10 content of 23.07 percent and the neutron radiation protection shielding rate of 98.5 percent; carrying out high speed dry milling on the fabric according to the standard of the Shore hardness, wherein the density of the fabric is 1.25g/cm, and the Shore hardness is 6.5 HD; the breaking strength of the fiber is 7.26 cN/dtex; the elongation for exercise was 40% and the hot-melt temperature was 343 ℃.
Example 3, raw material nylon-6 chips, boron-10-enriched boron carbide and antioxidant 1010 were added to a mixing kettle, and after mixing uniformly, they were melt extruded in a screw extruder, metered by a metering pump, spun from a spinneret, cooled and drafted by air flow, wound, spooled, doubled, twisted to obtain a blended melt spun precursor fiber, 1 blended melt spun precursor fiber was twisted with 1 carbon fiber, and then spooled, warped, and combined through warp.
Adding raw materials of nylon-6 slices, boron-10-enriched boron carbide and an antioxidant 1010 into a mixing kettle, uniformly mixing, then putting into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by airflow, winding, and then carrying out doubling, twisting and weft winding processes to form weft.
The weight ratio of the enriched boron-10 boron carbide to the nylon-6 slices is 35: 100; the weight ratio of the antioxidant to the nylon-6 chip is 0.5: 100, respectively;
the middle temperature of the screw extruder is 600 ℃, and the tail temperature is 585 ℃.
The cloth woven by the warps and the wefts has the boron-10 content of 26.92 percent and the neutron radiation protection shielding rate of 99.5 percent; carrying out high speed dry milling on the fabric according to the standard of the Shore hardness, wherein the density of the fabric is 1.29g/cm, and the Shore hardness is 7.0 HD; the breaking strength of the fiber is 7.83 cN/dtex; the elongation for exercise was 42% and the hot-melt temperature was 347 ℃.
Claims (5)
1, an industrial production method of neutron radiation protection fiber material, which is characterized in that:
, adding raw materials of nylon-6 slices, boron-10-enriched boron carbide and an antioxidant into a mixing kettle, uniformly mixing, then putting into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by air flow, winding, obtaining blended melt-spun precursor fibers by cop, spooling, doubling and twisting, twisting the blended melt-spun precursor fibers and carbon fibers for stranding, and then spooling, warping and tying to form warps;
secondly, adding the raw material nylon-6 slices, boron-10-enriched boron carbide and an antioxidant into a mixing kettle, uniformly mixing, then feeding into a screw extruder for melt extrusion, metering by a metering pump, spinning from a spinneret plate, cooling and drafting by airflow, winding, and then feeding into the processes of doubling, twisting and weft winding to form weft;
and thirdly, weaving the warps and the wefts through a loom to obtain the high-performance woven fabric capable of preventing neutron and X-ray radiation.
2. The industrial production method of a neutron radiation protection fiber material according to claim 1, wherein: the enriched boron-10 boron carbide: (10B4C) The abundance ratio of boron-10 is above 96, and the particle size distribution is 0.5-40 microns.
3. The industrial production method of a neutron radiation protection fiber material according to claim 1, wherein: added of10B4The weight ratio of the C to the nylon-6 chips is 30-35: 100.
4. The industrial production method of a neutron radiation protection fiber material according to claim 1, wherein: the weight ratio of the antioxidant to the nylon-6 slice is 0.1-0.5: 100.
5. the industrial production method of a neutron radiation protection fiber material according to claim 1, wherein: the warp is produced by plying and twisting 1 blended melt-spun precursor fiber with 1 carbon fiber.
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