CN114457624A - Microfiber glass wool and glass microfiber filter paper - Google Patents
Microfiber glass wool and glass microfiber filter paper Download PDFInfo
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- CN114457624A CN114457624A CN202111612127.5A CN202111612127A CN114457624A CN 114457624 A CN114457624 A CN 114457624A CN 202111612127 A CN202111612127 A CN 202111612127A CN 114457624 A CN114457624 A CN 114457624A
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- 239000011491 glass wool Substances 0.000 title claims abstract description 126
- 229920001410 Microfiber Polymers 0.000 title claims abstract description 124
- 239000003658 microfiber Substances 0.000 title claims abstract description 124
- 239000011521 glass Substances 0.000 title claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 43
- 238000009826 distribution Methods 0.000 claims abstract description 35
- 239000003365 glass fiber Substances 0.000 claims abstract description 33
- 239000002253 acid Substances 0.000 claims abstract description 30
- 230000004580 weight loss Effects 0.000 claims abstract description 25
- 238000002791 soaking Methods 0.000 claims abstract description 22
- 239000002893 slag Substances 0.000 claims abstract description 20
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 17
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 12
- 229910052681 coesite Inorganic materials 0.000 claims description 11
- 229910052906 cristobalite Inorganic materials 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052682 stishovite Inorganic materials 0.000 claims description 11
- 229910052905 tridymite Inorganic materials 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 8
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims description 7
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 description 18
- 238000001914 filtration Methods 0.000 description 7
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000012797 qualification Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 238000004031 devitrification Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- 229910006282 Si—O—Li Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 oxygen ions Chemical class 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4218—Glass fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/08—Filter paper
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
The invention provides microfiber glass wool and glass microfiber filter paper, wherein the microfiber glass wool is formed by interweaving a plurality of glass fibers, the quality factor beta of the microfiber glass wool obtained by the formula (1) satisfies that beta is less than or equal to 2, and the formula (1) is as follows:
wherein Q represents tensile strength, N/cm2(ii) a S represents tensile strength after irradiation, N/cm2(ii) a σ represents the standard deviation of the fiber diameter distribution; z represents the shot content; l represents acid soak weight loss. The microfiber glass wool has good performance balance among tensile strength, post-irradiation tensile strength, fiber diameter distribution standard deviation, slag ball content and acid soaking weight loss, and has excellent comprehensive performance.
Description
Technical Field
The invention relates to the field of inorganic non-metallic materials, in particular to microfiber glass wool and glass microfiber filter paper.
Background
The microfiber glass wool is an inorganic non-metallic material with excellent performance, has the characteristics of insulation, heat resistance, flame retardance, high strength and the like, and is widely applied to the fields of filtering materials, protective materials, separating materials (coalescence), shielding materials, heat preservation, sound insulation and the like.
According to different applications, the microfiber glass wool needs to be provided with different characteristics, such as tensile strength, fiber diameter distribution, slag ball content, acid and alkali resistance and the like. In general, in order to improve the tensile strength of the microfiber glass wool, the standard deviation of fiber distribution is reduced, but the content of slag balls in the microfiber glass wool is increased, the weight loss caused by acid soaking is increased, and the increase of the strength loss rate after irradiation is possibly influenced, which are not desirable, so that the microfiber glass wool with balanced performance is urgently expected to meet the requirements of production and living.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, it is an object of the present invention to provide a microfiber glass wool having a well-balanced property among tensile strength, fiber diameter distribution concentration, shot content, and acid and alkali resistance.
One aspect of the present invention provides a microfiber glass wool, which may be formed by interweaving a plurality of glass fibers, wherein a quality factor β of the microfiber glass wool obtained by formula (1) may satisfy β ≦ 2, and formula (1) is:
wherein Q represents tensile strength, N/cm2(ii) a S represents tensile strength after irradiation, N/cm2(ii) a σ represents the standard deviation of the fiber diameter distribution; z represents the shot content,%; l represents weight loss in acid soaking,%.
Further, the tensile strength may be 9N/cm2～80N/cm2And the tensile strength after irradiation can be 6.5N/cm2～50N/cm2The standard deviation of the fiber diameter distribution can be less than or equal to 1.5, the slag ball content can be less than or equal to 0.45 percent, and the acid soaking weight loss can be less than or equal to 3.5 percent.
Further, the tensile strength may be 9.2N/cm2～15N/cm2And the tensile strength after irradiation can be 6.7N/cm2～12N/cm2The standard deviation of the fiber diameter distribution can be 1.2-1.5, the content of slag balls is less than or equal to 0.43 percent, and the weight loss of acid soaking is less than or equal to 2.4 percent.
Further, the tensile strength may be 16N/cm2～65N/cm2And the tensile strength after irradiation can be 12.5N/cm2～48N/cm2The standard deviation of fiber diameter distribution can be 0.49-1.0, the content of slag balls can be less than or equal to 0.35%, and the weight loss of acid soaking can be less than or equal to 1.9%. For example, the tensile strength may be 16.8N/cm2～62N/cm2And the tensile strength after irradiation can be 13N/cm2～46N/cm2。
Further, the quality factor may be β ≦ 1.2.
Further, the tensile strength after irradiation may be not less than 5.0X 105Tensile strength after Gy cumulative dose gamma irradiation.
Furthermore, the average diameter of a plurality of glass fibers can be 0.1-10 μm, and the standard deviation of the fiber diameter distribution can be less than or equal to 1.4.
Further, the microfiber glass wool may comprise, in parts by weight: 8-21 parts of RO, wherein RO is Li in the microfiber glass wool component2O，Na2O and K2The sum of O.
Further, RO can be 0.01-5 parts by weight of Li2O, 5.2-13 parts of Na2O and 1 to 3 parts of K2And (C) O.
Further, the microfiber glass wool may comprise, in parts by weight: 2-15 parts of MO, wherein the MO is the sum of MgO, CaO and BaO in the microfiber glass wool component.
Further, MO may be composed of 0-1.5 parts by weight of MgO, 0.1-5.5 parts by weight of CaO, and 2-7 parts by weight of BaO.
Further, the microfiber glass wool may comprise, in parts by weight: 50-65.5 parts of SiO21.5-10 parts of A12O37-16 parts of B2O32-7 parts of ZnO and 0-0.3 part of ZrO2And 0 to 0.2 parts of TiO2。
Further, the microfiber glass wool may comprise, in parts by weight: 52-64 parts of SiO22.5 to 8.7 portions of A12O39.6 to 14.3 parts of B2O32.2 to 6.4 parts of ZnO and 0 to 0.25 part of ZrO2And 0 to 0.15 parts of TiO2。
Further, the microfiber glass wool may comprise, in parts by weight: 3-6 parts of BaO and 2.5-6 parts of ZnO.
Another aspect of the present invention provides a glass microfiber filter paper, which can be prepared from the above microfiber glass wool.
Compared with the prior art, the invention has the beneficial effects that:
the microfiber glass wool has excellent balance performance, can ensure that the tensile strength, the tensile strength after irradiation, the fiber diameter distribution standard deviation, the slag ball content and the acid soaking weight loss have good balance, has higher chemical stability and thermal stability, and is difficult to damage and longer in service life.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
fig. 1 is an SEM image of microfiber glass wool with a freeness of 19 degrees for example 1.
Fig. 2 is an SEM image of microfiber glass wool with a freeness of 34 degrees for example 2.
Fig. 3 is an SEM image of microfiber glass wool having a comparative example freeness of 34 degrees.
Detailed Description
Hereinafter, a microfiber glass wool and a glass microfiber filter paper according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
Specifically, in order to satisfy a specific property of the microfiber glass wool, people constantly strive to optimize the property to an optimal value, and at the same time, the property is pursued while influences on other properties are often ignored, so that the overall properties of the microfiber glass wool are influenced. Accordingly, it is desirable to obtain microfiber glass wool with a balance of properties. The inventor creatively introduces a quality factor to measure the balance relation among various performances of the microfiber glass wool, and the products meet the set quality factor so as to achieve the optimal balance state among the performances. The quality factor of the microfiber glass wool is controlled to be not more than 2, so that the comprehensive performance of glass fibers can be optimal, the tensile strength performance of the microfiber glass wool can be better, the prepared filter paper is not easy to damage after being pulled under the same fiber diameter, and when the microfiber glass wool is used for a liquid filtering and separating technology, the filter paper can resist the impulsive force caused by the fact that fluid passes through a filter material, the service life is prolonged, and the loss of the filter paper is reduced; the performance of the filter paper for resisting irradiation is improved, and the filter paper can be better applied to water and air filtration of a nuclear power station and the like.
One aspect of the present invention provides a microfiber glass wool. In one exemplary embodiment of the microfiber glass wool of the present invention, the microfiber glass wool may have a quality factor β satisfying β ≦ 2 obtained by formula (1), wherein formula (1) is:
wherein Q represents tensile strength, N/cm2(ii) a S represents tensile strength after irradiation, N/cm2(ii) a σ represents the standard deviation of the fiber diameter distribution; z represents the shot content,%; l represents weight loss in acid soaking,%.
Above, the quality factor β of the microfibrous glass wool can be controlled to be not more than 2. Compared with the microfiber glass wool with the quality factor of more than 2, the microfiber glass wool with the quality factor of less than or equal to 2 has obvious performance difference of the filter paper obtained under the same preparation conditions, and is mainly represented as follows: the processing qualification rate and the service life of the filter paper are obviously enhanced, the processing qualification rate is improved by more than 5.2 percent, and the service life of the filter paper is improved by more than 6.1 percent; the filter paper is not easy to break in the filtering process; the irradiation resistance of the filter paper is improved, so that the filter paper is more widely applied to the fields of nuclear power and the like. Preferably, the quality factor beta is less than or equal to 1.2, and at the moment, compared with microfiber glass wool with the quality factor of 1.2-2, the processing qualification rate of the prepared filter paper is improved by more than 0.8%, and the service life of the filter paper is improved by more than 0.3%.
Furthermore, the tensile strength of the glass fiber cotton, including the tensile strength before irradiation (i.e. tensile strength Q) and the tensile strength after irradiation, has obvious influence on the processing qualification rate and the service life of the filter paper. The tensile strength of the microfiber glass wool can be 9N/cm2～80N/cm2And the tensile strength after irradiation can be 6.5N/cm2～50N/cm2Within the performance range, the processing qualification rate and the service life of the filter paper can be obviously improved. For example, the tensile strength may be 9N/cm2、18N/cm2、26N/cm2、30N/cm2、41N/cm2、50N/cm2、59N/cm2、62N/cm2、67N/cm2、71N/cm2Or 78N/cm2(ii) a The tensile strength after irradiation can be 7N/cm2、11N/cm2、18N/cm2、28N/cm2、37N/cm2、41N/cm2、45N/cm2Or 49N/cm2。
Further, the standard deviation of the fiber diameter distribution is an evaluation index of whether the average fiber diameter is concentrated or not. The standard deviation of the fiber diameter distribution is related to the tensile strength of the microfiber glass wool, and the tensile strength of the microfiber glass wool is 9N/cm2～80N/cm2On the premise that the standard deviation of the fiber diameter distribution is less than or equal to 1.5, the microfiber glass wool can have better tensile strength while the fiber diameter of the microfiber glass wool tends to be in a concentrated state. For example, inThe tensile strength of the microfiber glass wool is 20N/cm2～57N/cm2On the premise of (1), the standard deviation of the fiber diameter distribution is 1.2-1.5. As another example, the tensile strength of the microfiber glass wool is 32N/cm2～72N/cm2On the premise of (1), the standard deviation of the fiber diameter distribution is 0.2-1.1.
Further, the content of the slag balls of the microfiber glass wool can be less than or equal to 0.45%. The shot content of the microfiber glass wool is related to the product performance of the filter paper. Under the content of the slag balls, the loss of the prepared filter paper is low, and the performance of the filter paper can be obviously improved. For example, the shot content of the microfibrous glass wool may be not greater than 0.42, or not greater than 0.35, or not greater than 0.21.
Further, the acid soak weight loss of the microfiber glass wool correlates with the durability and service life after the filter paper is prepared. The soaking-resistant weight loss of the microfibrous glass wool may be less than or equal to 3.5%. Under the condition that the soaking-resistant weight loss is less than or equal to 3.5 percent, the acid resistance of the filter paper made can be better, and the filter paper has good tolerance and service life in an acid mist environment. For example, the soaking resistance weight loss may be not greater than 2.4% or not greater than 2.1% or not greater than 1.7% or not greater than 1.2% or not greater than 0.8%.
At present, people pay more attention to the influence of various parameters such as tensile strength, post-irradiation tensile strength, fiber diameter distribution standard deviation, slag ball content and acid soaking weight loss on the performance of the microfiber glass wool and the performance of prepared filter paper respectively, and neglect the control on the comprehensive performance of the microfiber glass wool. Researchers find that the relevance among the properties influences the balance property inside the microfiber glass wool and further influences the filtering property of a product, therefore, the quality factor beta for measuring the balance state of the microfiber glass wool is less than or equal to 2 by limiting and combining with the 9N/cm of the microfiber glass wool2～80N/cm2Tensile strength of 6.5N/cm2～50N/cm2The tensile strength after irradiation, the fiber diameter distribution standard deviation of not more than 1.5, the slag ball content of not more than 0.45 percent and the acid soaking weight loss of not more than 3.5 percent, enhance the product performance balance and ensure that the microfiber glass wool has higher healdsAnd the filter paper has better service life and breakage resistance.
Further, the microfiber glass wool may have a tensile strength of 9.2N/cm2～15N/cm2And the tensile strength after irradiation can be 6.7N/cm2～12N/cm2The standard deviation of the fiber diameter distribution can be 1.2-1.5, the content of slag balls can be less than or equal to 0.43%, and the weight loss of acid soaking can be less than or equal to 2.4%.
Further, the tensile strength of the microfiber glass wool may be 16N/cm2～65N/cm2And the tensile strength after irradiation can be 12.5N/cm2～48N/cm2The standard deviation of fiber diameter distribution can be 0.49-1.0, the content of slag balls can be less than or equal to 0.35%, and the weight loss of acid soaking can be less than or equal to 1.9%.
Further, the post-irradiation tensile strength means a tensile strength of not less than 5.0X 105Tensile strength after Gy cumulative dose gamma irradiation. For example, it may be 6.2 × 105Gy or 8.3X 105Gy or 9.1X 105Tensile strength after Gy cumulative dose gamma irradiation.
Further, the average diameter of the plurality of glass fibers is 0.1-10 μm, the standard deviation of the fiber diameter distribution is less than or equal to 1.4, and the microfiber glass wool has a fiber diameter distribution standard deviation of not less than 10N/cm within the range of the average diameter and the fiber diameter distribution standard deviation2The above tensile strength. For example, the average diameter of the plurality of glass fibers is 2 μm, and the standard deviation of the fiber diameter distribution is 1.3 or less; or the average diameter of a plurality of glass fibers is 5 mu m, and the standard deviation of the fiber diameter distribution is less than or equal to 1.2; the average diameter of a plurality of glass fibers is 7.2 mu m, and the standard deviation of the fiber diameter distribution is less than or equal to 1.1.
The tensile strength, shot content, acid soak weight loss, and post irradiation tensile strength above can be determined in any manner, for example, as measured according to the standard JC/T978.
Further, the microfiber glass wool may comprise, in parts by weight: 8-21 parts of RO, wherein RO is Li in the microfiber glass wool component2O，Na2O and K2The sum of O. RO range in the above ratioIn the enclosure, the standard deviation of the fiber diameter distribution can be reduced, so that the microfiber glass wool has better chemical stability and thermal stability. If the content of RO is more than 21 parts, the chemical stability and the thermal stability of the glass fiber are obviously reduced; if the content of RO is less than 8 parts, the content of glass fiber shot is increased.
Further, RO can be 0.01-5 parts by weight of Li2O, 5.2-13 parts of Na2O and 1 to 3 parts of K2And (C) O. Li2O (lithium oxide) is a network exoxide in the glass structure, and mainly has an effect of increasing the accumulation, so that the coefficient of proportional expansion can be reduced, and the crystallization tendency can be reduced. Preferably, Li2The weight part of O can be 1-5 parts, and the quality of the microfiber glass wool can be improved compared with other Li2The addition of the O part improves the hydrolytic resistance by 20 to 30 percent, improves the acid resistance by 30 to 35 percent, and can also improve the chemical stability and the filtering performance of the filter paper prepared from the microfiber glass wool. Introduced Li2When the amount of O exceeds 5 parts, Si-O-Si bonds in the glass are broken to form Si-O-Li bonds, resulting in a decrease in strength of the microfibrous glass wool and a significant increase in production cost. Na (Na)2The weight part of O is controlled to be 5.2-13 parts, and the glass can have proper melting temperature, viscosity and crystallization property in the range, so that the chemical stability and thermal stability of the microfiber glass wool can be correspondingly improved, and the electrical conductivity, dielectric constant and thermal expansion coefficient of the glass surface can be improved; if Na2O in an amount of less than 5.2 parts by weight or more than 13 parts by weight may decrease chemical and thermal stability of the microfiber glass fiber. 1-3 parts by weight of K2O gives the maximum free oxygen capacity, increases the glass gloss while reducing the glass devitrification capacity, and K in this range2O can also improve the bushing plate drawing temperature. Preferably, 1-5 parts of Li is passed through2O, 5.2-12 parts of Na2O and 1.2 to 2.8 parts of K2And the O is matched with each other, so that the chemical stability and the thermal stability of the glass fiber can be improved to the maximum extent while the content of glass fiber slag balls can be reduced. For example, RO may be calculated from 1 part by weight of Li2O, 5.6 parts of Na2O and 1.3 parts of K2O composition; also for example, RO may consist of 2.5 parts by weight of Li2O, 10.2 parts of Na2O and 2.1 parts of K2O composition; as another example, RO may be comprised of 4.2 parts by weight of Li2O, 12.1 parts of Na2O and 2.8 parts of K2And (C) O.
Furthermore, the micro-fiber glass wool can contain 0-0.3 part of ZrO in parts by weight2(zirconia). Of course, the microfibrous glass wool according to the invention may contain ZrO2Optionally, ZrO may be excluded2. Preferably, ZrO may be introduced2。ZrO2Is an intermediate oxide, with incorporation of not more than 0.3 parts of ZrO2The glass fiber filter paper has the advantages of reducing the crystallization temperature of glass, widening the drawing operation temperature, improving the viscosity, hardness, elasticity and chemical stability of the glass, reducing the thermal expansion coefficient of the glass, forming glass fibers with good chemical stability and thermal stability, and promoting the improvement of the chemical stability and the thermal stability of the glass fiber filter paper. ZrO (ZrO)2The amount to be incorporated is not so high, and when it exceeds 0.3 part, there is a possibility that the glass devitrification tendency and the devitrification temperature are increased, resulting in an excessively high viscosity of the glass fiber and difficulty in forming the fiber. For example, incorporated ZrO2The parts of (b) may be 0.2 parts or 0.25 parts or 0.18 parts.
Further, the microfiber glass wool comprises the following components in parts by weight: 2-15 parts of MO, wherein the MO is the sum of MgO, CaO and BaO in the microfiber glass wool component. The composite material contains 2-15 parts of MO, so that the glass fiber has durability, particularly water erosion resistance, and the chemical stability, hardness and mechanical strength of the glass can be improved. In addition, the alkali metal plays a role in filling network gaps in the glass structure, the density of the glass fiber can be adjusted, and in addition, the oxygen ions of the glass fiber greatly change electron clouds on the cation outermost layer by adding the alkaline earth metal oxide with the content, so that the polarizability of the electron clouds is increased, and the dielectric constant is improved. Too high content of MO increases the acid soaking weight loss, affects the weather resistance and service life of the filter paper, and therefore, the content of MO introduced is limited to 15 parts or less. For example, the microfiber glass wool comprises 4 parts MO, 8 parts MO, 10 parts MO, or 13 parts MO by weight.
Further, MO may be composed of 0-1.5 parts by weight of MgO, 0.1-5.5 parts by weight of CaO, and 2-7 parts by weight of BaO. Specifically, CaO is limited to 0.1 to 5.5 parts, and when the CaO is too low, the density of the glass fiber is reduced; when the CaO content exceeds 5.5 parts, the node constant of the microfiber glass wool is low. BaO is related to the acid and water resistance of microfiber glass wool. 2-7 parts of BaO can enhance the acid resistance and water resistance of the microfiber glass wool, reduce the melting temperature of the glass fiber, improve the chemical stability, flexibility and glossiness of the glass fiber and prolong the service life of the filter paper. When BaO exceeds 7 parts, the standard deviation of the fiber increases, increasing energy consumption and cost. The microfiber glass wool may or may not contain MgO, and preferably, may contain MgO in an amount of not more than 1.5 parts by weight, for example, may be 1.2 parts or 0.8 parts.
Further, the microfiber glass wool may comprise, in parts by weight: 50-65.5 parts of SiO21.5-10 parts of A12O37-16 parts of B2O32-7 parts of ZnO and 0-0.3 part of ZrO2And 0 to 0.2 parts of TiO2. Specifically, 50 to 65.5 parts of SiO2And 1.5-10 parts of A12O3The glass fiber has high viscosity, high melting temperature, high chemical stability and high mechanical strength. If SiO2Is less than 50 parts by weight and A12O3The weight part of the glass wool is less than 1.5 parts, so that the chemical stability and the mechanical strength of the microfiber glass wool cannot be improved; if SiO2More than 65.5 parts by weight and A12O3The weight of the micro-fiber glass wool is more than 10 parts, so that the slag ball content and the acid soaking weight loss of the micro-fiber glass wool are improved, and the fiber diameter distribution standard deviation is increased, so that the uniformity of the filter paper is influenced, the leakage is increased, and the filtering performance is influenced. B is2O3The introduction amount of the glass fiber can be 7-16 parts, and the glass melting temperature, the thermal expansion coefficient and the crystallization property can be reduced within the range of the parts by weight, so that the chemical stability of the microfiber glass wool is improved, and the fiber standard is reducedAnd (4) poor. B2O3The content of (A) is less than 7 parts, so that the improvement of the chemical stability of the microfiber glass wool is not obvious; if B is2O3The content of (b) is more than 16 parts, which reduces the mechanical strength of the glass fiber, thereby affecting the strength, stiffness and service life of the filter paper. TiO 22The introduction amount of (b) can be 0-0.2 part, TiO2As transition metal oxide, the glass fiber has high polarization effect and can improve the dielectric constant of the glass fiber. TiO 22When the content of (B) is more than 0.2 parts by weight, the crystallization temperature may be increased, and fibers may be hardly formed.
Here, it is to be noted that SiO of the above-mentioned composition2、A12O3、B2O3ZnO and ZrO2The components are matched with each other, so that the microfiber glass wool has better balance and can show the comprehensive performance of the microfiber glass wool. Preferably, the microfibrous glass wool comprises, in parts by weight: 52-64 parts of SiO22.5 to 8.7 portions of A12O39.6 to 14.3 parts of B2O32.2 to 6.4 parts of ZnO and 0 to 0.25 part of ZrO2At this time, the quality factor beta of the microfiber glass wool is less than or equal to 1.1, so that the balance of the performance of the microfiber glass wool can be better realized. For example, the microfiber glass wool may comprise, in parts by weight: 55 parts of SiO23.2 parts of A12O310.2 parts of B2O33.5 parts of ZnO and 0.1 part of ZrO2. For another example, the microfiber glass wool may comprise, in parts by weight: 62 parts of SiO26.8 parts of A12O312.4 parts of B2O35.3 parts of ZnO and 0.2 part of ZrO2. The microfibrous glass wool may contain only the components described in the present invention, or may contain other impurities inevitable in the production of microfibrous glass wool or other additional elements to enhance its properties.
Further, the microfiber glass wool may comprise, in parts by weight: 3-6 parts of BaO and 2.5-6 parts of ZnO. BaO and ZnO promote each other, which collectively affect the chemical stability, softness, gloss of microfiber glass wool and the service life of filter papers made therefrom. BaO and ZnO in the above range can further enhance the acid resistance and water resistance of the filter paper compared with the added single oxide, and simultaneously greatly improve the chemical stability, flexibility and glossiness of the glass fiber, and prolong the service life of the filter paper by more than 2%.
Further, the microfiber glass wool may comprise, in parts by weight:
50-65.5 parts of SiO21.5-10 parts of A12O37-16 parts of B2O32-7 parts of ZnO and 0-0.3 part of ZrO20 to 0.2 parts of TiO28-21 parts of RO and 2-15 parts of MO, wherein the RO can be 0.01-5 parts of Li by weight2O, 5.2-13 parts of Na2O and 1 to 3 parts of K2O composition; the MO is composed of 0-1.5 parts of MgO, 0.1-5.5 parts of CaO and 2-7 parts of BaO in parts by weight. The components are matched with each other, so that the tensile strength of the microfiber glass wool is 9N/cm2～80N/cm2Tensile strength after irradiation of 6.5N/cm2～50N/cm2The standard deviation of the fiber diameter distribution is less than or equal to 1.5, the slag ball content is less than or equal to 0.45 percent, the acid soaking weight loss is less than or equal to 3.5 percent, and the quality factor beta of the microfiber glass wool satisfies that the beta is less than or equal to 2.
Another aspect of the present invention provides a glass microfiber filter paper, which can be prepared from the above microfiber glass wool. The preparation method can be a conventional preparation method in the field. The filter paper prepared by the microfiber glass wool has better breakage resistance, improves the production capacity and production efficiency of the filter paper, prolongs the service life and increases the application field of the filter paper.
For a better understanding of the present invention, the following further illustrates the contents of the present invention with reference to specific examples, but the contents of the present invention are not limited to the following examples.
The microfiber glass wool contained the following components in parts by weight as shown in table 1.
TABLE 1 compositional composition of various exemplary microfiber glass wool
Measured according to the method described in Standard JC/T978 and after irradiation the tensile strength is 6.2X 105The tensile strength after gamma ray irradiation of the cumulative dose of Gy was measured, and the test results are shown in table 2.
TABLE 2 microfiber glass wool test Performance for each example
Fig. 1 is an SEM picture of microfiber glass wool having a beating degree of 19 degrees in example 1, wherein the diameter of the glass fiber is 1.8 μm to 7.2 μm, no obvious slag balls are generated, and the balance of the performance of the microfiber glass wool is good according to the description in table 2. Fig. 2 is an SEM picture of microfiber glass wool having a freeness of 34 degrees of example 2, and it can be seen that the standard deviation of fiber diameters is small. According to the description in Table 2, the quality factor is 1.14, and the balance performance is better. Fig. 3 is an SEM image of the microfiber glass wool having a comparative example freeness of 34 degrees, and comparing with fig. 3, the microfiber glass wool has a quality factor of more than 2 and reaches 2.29, and the microstructure thereof shows that obvious shot appears and the balance of properties is poor.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The microfiber glass wool is characterized by being formed by interweaving a plurality of glass fibers, wherein a quality factor beta of the microfiber glass wool satisfies beta not more than 2, and the quality factor beta is obtained through an equation (1), wherein the equation (1) is as follows:
wherein Q represents tensile strength, N/cm2(ii) a S represents tensile strength after irradiation, N/cm2(ii) a σ represents the standard deviation of the fiber diameter distribution; z represents the shot content,%; l represents weight loss in acid soaking,%.
2. Microfiber glass wool according to claim 1, wherein the tensile strength is 9N/cm2～80N/cm2Tensile strength after irradiation of 6.5N/cm2～50N/cm2The standard deviation of fiber diameter distribution is less than or equal to 1.5, the slag ball content is less than or equal to 0.45 percent, and the acid soaking weight loss is less than or equal to 3.5 percent.
3. Microfibrous glass wool according to claim 1 or 2, characterized in that the tensile strength is 9.2N/cm2～15N/cm2Tensile strength after irradiation of 6.7N/cm2～12N/cm2The standard deviation of fiber diameter distribution is 1.2-1.5, the content of slag balls is less than or equal to 0.43%, and the weight loss of acid soaking is less than or equal to 2.4%.
4. Microfibrous glass wool according to claim 1 or 2, characterized in that the tensile strength is 16N/cm2～65N/cm2Tensile strength after irradiation of 12.5N/cm2～48N/cm2The standard deviation of fiber diameter distribution is 0.49-1.0, the content of slag balls is less than or equal to 0.35%, and the weight loss of acid soaking is less than or equal to 1.9%.
5. Microfiber glass wool according to claim 1 or 2, wherein the tensile strength after irradiation is not less than 5.0 x 105Tensile strength after Gy cumulative dose gamma irradiation.
6. Microfiber glass wool according to claim 1 or 2, wherein the average diameter of the plurality of glass fibers is 0.1 μm to 10 μm and the standard deviation of the fiber diameter distribution is 1.4 or less.
7. Microfiber glass wool according to claim 1 or 2, wherein microfiber glass wool comprises in parts by weight:
8-21 parts of RO, wherein RO is Li in the microfiber glass wool component2O，Na2O and K2The sum of O, wherein RO is 0.01-5 parts of Li2O, 5.2-13 parts of Na2O and 1-3 parts of K2And (C) O.
8. Microfiber glass wool according to claim 1 or 2, wherein microfiber glass wool comprises in parts by weight:
2-15 parts of MO, wherein the MO is the sum of MgO, CaO and BaO in the microfiber glass wool component, and the MO consists of 0-1.5 parts of MgO, 0.1-5.5 parts of CaO and 2-7 parts of BaO.
9. Microfiber glass wool according to claim 1 or 2, wherein microfiber glass wool comprises in parts by weight:
50-65.5 parts of SiO21.5-10 parts of A12O37-16 parts of B2O32-7 parts of ZnO and 0-0.3 part of ZrO2And 0 to 0.2 parts of TiO2。
10. Glass microfiber filter paper, which is characterized by being prepared from microfiber glass wool of any one of 1 to 9.
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| US20120129678A1 (en) * | 2009-07-02 | 2012-05-24 | Chongqing Polycomp International Corporation | High-intensity and high-modulus glass fiber |
| CN105908560A (en) * | 2016-04-19 | 2016-08-31 | 中材科技股份有限公司 | Preparation method of irradiation-resistant glass fiber air filter paper |
| CN107830310A (en) * | 2017-11-14 | 2018-03-23 | 湖州交科规划设计有限公司 | A kind of household electrical appliances mineral wool |
| CN113003941A (en) * | 2021-03-15 | 2021-06-22 | 南京玻璃纤维研究设计院有限公司 | Glass composition, glass fiber cotton, fiber blended yarn and preparation method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120129678A1 (en) * | 2009-07-02 | 2012-05-24 | Chongqing Polycomp International Corporation | High-intensity and high-modulus glass fiber |
| CN105908560A (en) * | 2016-04-19 | 2016-08-31 | 中材科技股份有限公司 | Preparation method of irradiation-resistant glass fiber air filter paper |
| CN107830310A (en) * | 2017-11-14 | 2018-03-23 | 湖州交科规划设计有限公司 | A kind of household electrical appliances mineral wool |
| CN113003941A (en) * | 2021-03-15 | 2021-06-22 | 南京玻璃纤维研究设计院有限公司 | Glass composition, glass fiber cotton, fiber blended yarn and preparation method |
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Address after: 401120 No.1, Chanyi Road, Huixing street, Yubei District, Chongqing Patentee after: CHONGQING ZAISHENG TECHNOLOGY Corp.,Ltd. Patentee after: Chongqing Fiber Research and Design Institute Co.,Ltd. Address before: 401120 No.1, Chanyi Road, Huixing street, Yubei District, Chongqing Patentee before: CHONGQING ZAISHENG TECHNOLOGY Corp.,Ltd. Patentee before: CHONGQING FIBER RESEARCH AND DESIGN INSTITUTE CO.,LTD. |