CN113666627B - Preparation method of low-expansion-coefficient direct twistless roving - Google Patents
Preparation method of low-expansion-coefficient direct twistless roving Download PDFInfo
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- CN113666627B CN113666627B CN202110775528.6A CN202110775528A CN113666627B CN 113666627 B CN113666627 B CN 113666627B CN 202110775528 A CN202110775528 A CN 202110775528A CN 113666627 B CN113666627 B CN 113666627B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
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- 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
-
- 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
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/1095—Coating to obtain coated fabrics
-
- 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
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/323—Polyesters, e.g. alkyd resins
-
- 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
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/36—Epoxy resins
-
- 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
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/40—Organo-silicon compounds
-
- 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
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/465—Coatings containing composite materials
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
-
- 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
- D10B2101/00—Inorganic fibres
- D10B2101/02—Inorganic fibres based on oxides or oxide ceramics, e.g. silicates
- D10B2101/06—Glass
Abstract
The invention discloses a preparation method of direct twistless roving with a low expansion coefficient, and belongs to the technical field of inorganic non-metallic materials. The preparation method of the low-expansion coefficient direct twistless roving comprises the following steps: weighing raw materials according to a proportion, putting the raw materials into a glass melting furnace, carrying out vitrification and melting treatment, then carrying out spinning forming to obtain glass fibers, coating a sizing agent after cooling, then winding the glass fibers into low-expansion-coefficient direct twistless roving by a direct twistless roving drawing machine, and drying the twistless roving. According to the invention, through the limitation of the glass fiber raw material and the limitation of the components of the coated impregnating compound, the direct twistless roving with low expansion coefficient, high breaking strength and bending strength of the pultruded bar and low hairiness can be successfully obtained.
Description
Technical Field
The invention relates to the technical field of inorganic non-metallic materials, in particular to a preparation method of low-expansion-coefficient direct untwisted roving.
Background
Glass fiber (Fiberglass) is an inorganic non-metallic material with excellent performance, has good insulativity, strong heat resistance, good corrosion resistance and high mechanical strength, but is brittle and has poor wear resistance. The hair-care fiber is prepared from six kinds of ores of pyrophyllite, quartz sand, limestone, dolomite, borocalcite and boromagnesite by the processes of high-temperature melting, wire drawing, winding, weaving and the like, wherein the diameter of each monofilament ranges from several micrometers to twenty micrometers, the monofilament is equivalent to 1/20-1/5 of one hair, and each fiber protofilament bundle consists of hundreds of monofilaments or even thousands of monofilaments. Glass fibers are generally used as reinforcing materials, electrical insulating materials, thermal insulating materials, circuit boards and other inorganic fiber reinforcing materials in composite materials in various fields of national economy, and are the most used inorganic fiber reinforcing materials at present.
The glass fiber direct roving is widely applied to the fields of shipbuilding, wind blades, petrochemical industry, architectural decoration, heat preservation, heat insulation and the like. Conventional glass fibers are often brittle without surface treatment, and the surface of the glass fibers is often coated with a sizing agent to improve the performance of the glass fibers. The properties of the glass fibers themselves and the special sizing agents are the main influencing factors for improving the properties of the prepared direct roving.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a preparation method of direct twistless roving with low expansion coefficient; the invention utilizes the specific glass fiber composition, can effectively reduce the glass fiber forming temperature, has lower thermal expansion coefficient, higher strength and elastic modulus, and obtains the low-expansion coefficient direct twistless roving with less hairiness after being treated by the special impregnating compound.
In order to solve the technical problems, the invention provides the following technical scheme:
in one aspect, the present invention provides a method of making a low expansion coefficient direct twistless roving, comprising: weighing raw materials in proportion, putting the raw materials into a glass melting furnace, carrying out vitrification and melting treatment, then carrying out spinning forming to obtain glass fibers, coating a sizing agent after cooling, then winding the glass fibers into direct twistless roving with a low expansion coefficient by a direct twistless roving drawing machine, and drying the twistless roving; wherein:
the impregnating compound comprises the following components in parts by weight: 5-15 parts of a silane coupling agent; 10-20 parts of unsaturated polyester resin emulsion; 10-30 parts of water-based epoxy resin emulsion; 1-10 parts of a surfactant; 1-5 parts of a pH regulator; 50-80 parts of deionized water; the silane coupling agent is a mixture of gamma-glycidyl ether propyl trimethoxy silane and divinyl triamino propyl triethoxy silane in a mass ratio of 1; the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and ethylene glycol ricinoleate sodium sulfate in a mass ratio of 1.
Further, the raw materials comprise the following components in percentage by weight:
yb of the above 2 O 3 、Gd 2 O 3 、Y 2 O 3 1-1.5, wherein the weight ratio is 1; r is 2 O is Na 2 O、K 2 O and Li 2 A mixture of O; wherein Na 2 O stands for R 2 15-22% of the total weight of O, K 2 O and Li 2 The weight ratio of O is 1.
Preferably, the raw materials consist of the following components in percentage by weight:
further, the CaO, mgO and Al 2 O 3 The weight ratio of (1); yb of said 2 O 3 、Gd 2 O 3 、Y 2 O 3 The weight ratio is 1.
Preferably, the pH adjusting agent is citric acid.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the invention greatly optimizes the glass fiber raw materials, so that the raw materials have synergistic effect, and the prepared direct twistless roving has lower low expansion coefficient.
SiO in the invention 2 The skeleton body forming the glass is a network forming substance, and SiO is limited for improving the strength of the glass fiber and ensuring the chemical stability 2 The content is constant. Al (Al) 2 O 3 The addition of (2) has influence on the crystallization tendency, stability and mechanical strength of the glass fiber, and the glass fiber is introduced into a silica network, so that the glass structure tends to be stable, and the expansion coefficient is reduced.
Meanwhile, a certain content of B is added in the invention 2 O 3 CaO and MgO, general formulaExcess pair of CaO, mgO and Al 2 O 3 The weight ratio of (A) to (B) is limited, so that B, ca and Mg with smaller ionic radius can enter a network, the compactness of the system is increased, and the expansion coefficient is reduced. Meanwhile, the addition of the components can reduce the viscosity of the glass to a certain degree, reduce the melting temperature of the glass and improve the strength to a certain degree.
In the invention, yb is also limited 2 O 3 、Gd 2 O 3 、Y 2 O 3 The three examples belong to 3-valent cations, so that the accumulation of the network can be improved to a certain extent, the compactness is improved, and the expansion coefficient is reduced. Meanwhile, the three ions have different ionic radiuses, and the three ions can be effectively prevented from moving in a network through grading of particle sizes, so that the mechanical property of the glass fiber is improved.
In the invention, siO 2 And Al 2 O 3 The network is formed by introducing a plurality of ions, and the additive amount of each substance is limited, so that the network is more compact by utilizing the synergistic effect among the ions, and the ions are difficult to move in the network, thereby obtaining the glass fiber composition with lower thermal expansion coefficient and higher mechanical property.
Meanwhile, the impregnating compound is prepared by using the silane coupling agent, the unsaturated polyester resin emulsion, the water-based epoxy resin emulsion and the surfactant, so that the expansion coefficient of the direct twistless roving can be effectively reduced, the breaking strength of the direct twistless roving is improved, a raw material guarantee is provided for a glass fiber textile product with high requirements, the performance of the direct twistless roving of the glass fiber can be improved, the hairiness generated by weaving is less, and the production performance and the application performance are better.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is given with reference to specific embodiments.
In the present invention, the materials and reagents used are not specifically described, and are commercially available.
The invention provides a preparation method of a low-expansion coefficient direct twistless roving, which comprises the following specific embodiments.
Example 1
A method for preparing a low expansion coefficient direct twistless roving comprises the following steps: raw materials are weighed according to the formula of example 1 in the table 1, put into a glass melting furnace, vitrified and melted, and then spun and molded to obtain the glass fiber. After cooling, coating the impregnating compound, then winding the obtained product into direct twistless roving with low expansion coefficient by a direct twistless roving drawing machine, and drying the obtained product at 110 ℃; wherein: the amount of the impregnating compound is 0.1 percent of the weight of the glass fiber; and the amounts of the components of the impregnating compound are shown in example 1 in Table 2. And the performance of the prepared low-expansion coefficient direct twistless roving is detected, and the result is shown in table 3.
Examples 2 to 6
The raw materials were weighed according to the formulations of examples 2 to 6 in Table 1, the amounts of the components of the impregnating compound were as shown in examples 2 to 6 in Table 2, respectively, and the other conditions were the same as in example 1.
To further illustrate the advantageous effects of the present invention, a comparative example was constructed as follows, taking example 5 as an example only, for space limitation.
Comparative examples 1 to 10
The raw materials were weighed according to the formulations of comparative examples 1 to 10 in Table 1, the formulation of the impregnating compound was the same as that of example 5, and the rest of the conditions were the same as that of example 5.
The examples and comparative examples of the present invention produced 2400Tex low expansion coefficient direct untwisted rovings, the amount of hairiness produced by a certain amount of direct untwisted rovings during the manufacturing process was determined, and the breaking strength was tested according to GB/T7690.3-2001. And the performance test of the unsaturated polyester resin pultruded bar with the diameter of 6mm is enhanced by using the low-expansion coefficient direct twistless roving prepared in the examples and the comparative examples; coefficient of expansion: the molten glass was melted according to the formulation, poured into a mold, cut into 4 × 25.4mm strips by a cutter, and the coefficient of thermal expansion was measured between room temperature (25 ℃) and 300 ℃ by a thermal expansion meter.
The low expansion coefficient direct untwisted rovings prepared in examples 1-6 were tested for properties and the results are shown in table 3. The low expansion coefficient direct untwisted rovings prepared in comparative examples 1-10 were tested for performance and the results are shown in Table 4.
TABLE 1
| Serial number | SiO 2 | Al 2 O 3 | CaO | MgO | SrO | Yb 2 O 3 | Gd 2 O 3 | Y 2 O 3 | B 2 O 3 | ZnO | Na 2 O | K 2 O | Li 2 O |
| Example 1 | 53 | 15 | 15.4 | 8 | 0.5 | 1 | 1.5 | 1.2 | 2 | 2 | 0.1 | 0.15 | 0.15 |
| Example 2 | 60 | 14 | 10 | 6 | 0.6 | 1.2 | 1 | 1.5 | 1.2 | 2.5 | 0.3 | 0.85 | 0.85 |
| Example 3 | 55 | 15 | 11 | 10 | 0.6 | 1.5 | 1.2 | 1 | 1 | 3 | 0.14 | 0.28 | 0.28 |
| Example 4 | 57 | 20 | 10 | 5 | 1 | 1 | 1 | 1 | 1 | 2 | 0.22 | 0.39 | 0.39 |
| Example 5 | 55 | 14 | 16 | 5.1 | 0.5 | 1.2 | 1.2 | 1.2 | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Example 6 | 56 | 14 | 12 | 6.7 | 0.8 | 1.5 | 1.5 | 1.5 | 1.5 | 3 | 0.3 | 0.6 | 0.6 |
| Comparative example 1 | 55 | 14 | 16 | 5.1 | 0.5 | -- | 1.8 | 1.8 | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Comparative example 2 | 55 | 14 | 16 | 5.1 | 0.5 | 1.8 | -- | 1.8 | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Comparative example 3 | 55 | 14 | 16 | 5.1 | 0.5 | 1.8 | 1.8 | -- | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Comparative example 4 | 55 | 20.1 | 5 | 10 | 0.5 | 1.2 | 1.2 | 1.2 | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Comparative example 5 | 55 | 12.88 | 22 | 0.22 | 0.5 | 1.2 | 1.2 | 1.2 | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Comparative example 6 | 55 | 14 | 16 | 5.1 | 0.5 | 0.72 | 1.44 | 1.44 | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Comparative example 7 | 55 | 14 | 16 | 5.1 | 0.5 | 1.44 | 0.72 | 1.44 | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Comparative example 8 | 55 | 14 | 16 | 5.1 | 0.5 | 1.44 | 1.44 | 0.72 | 1.8 | 2 | 0.3 | 0.85 | 0.85 |
| Comparative example 9 | 55 | 14 | 16 | 5.1 | 0.5 | 1.2 | 1.2 | 1.2 | 1.8 | 2 | 1 | 0.5 | 0.5 |
| Comparative example 10 | 55 | 14 | 16 | 5.1 | 0.5 | 1.2 | 1.2 | 1.2 | 1.8 | 2 | 0.2 | 0.9 | 0.9 |
TABLE 2
Performance testing was performed on the low expansion coefficient direct untwisted rovings prepared in examples 1-6, and the results are shown in Table 3. The low expansion coefficient direct untwisted rovings prepared in comparative examples 1-10 were tested for performance and the results are shown in Table 4.
TABLE 3
| Serial number | Amount of feather mg/kg | Breaking strength N/Tex | The bending strength of the pultruded bar is MPa | Coefficient of expansion, ppm/. Degree.C |
| Example 1 | 0.94 | 74.3 | 1364 | 2.6 |
| Example 2 | 0.82 | 75.6 | 1387 | 2.7 |
| Example 3 | 0.65 | 75.7 | 1403 | 2.4 |
| Example 4 | 0.57 | 78.4 | 1448 | 2.2 |
| Example 5 | 0.54 | 79.2 | 1460 | 2.1 |
| Example 6 | 0.55 | 79.3 | 1452 | 2.5 |
As can be seen from tables 1-3, in SiO 2 And Al 2 O 3 In the formed network, various ions are introduced, the synergistic effect among the ions is utilized, and the specific impregnating compound component is selected, so that the prepared low-expansion-coefficient direct twistless roving has the advantages of low expansion coefficient, high breaking strength and high bending strength of a pultruded bar, and meanwhile, the hairiness amount is less in the spinning process.
TABLE 4
As is clear from tables 1 to 4, yb in the present invention was compared with comparative examples 1 to 3 2 O 3 、Gd 2 O 3 、Y 2 O 3 After the three are replaced by any two, the thermal expansion coefficient of the obtained direct roving is obviously higher than that of the glass fiber, and the breaking strength and the bending strength of the pultruded bar are far lower than those of the glass fiber and the pultruded bar. This is probably because on the basis of the silica and alumina network of the present invention, B, ca and Mg with smaller ionic radius can enter the network, increasing the system compactness and reducing the expansion coefficient. At the same time, yb 2 O 3 、Gd 2 O 3 、Y 2 O 3 The three examples of the dosage of (A) belong to 3-valent cations, and can improve the accumulation of the network to a certain extent, improve the compactness and reduce the expansion coefficient. Meanwhile, the three ions have different ionic radiuses, and the three ions can be effectively prevented from moving in the network through grading of the particle size, so that the mechanical property of the glass fiber is improved.
In comparative examples 4 to 8, caO, mgO and Al were adjusted 2 O 3 And Yb 2 O 3 、Gd 2 O 3 、Y 2 O 3 In such a range that it is outside the scope of the present invention, obtaining direct untwisted rovingsThe thermal expansion coefficient, the breaking strength and the bending strength of the pultruded rods were greatly different from those of example 5 of the present invention because CaO, mgO and Al were present in a specific ratio range 2 O 3 And Yb 2 O 3 、Gd 2 O 3 、Y 2 O 3 The synergistic effect can make the network more compact, reduce the expansion coefficient and improve the strength to a certain extent.
In comparative examples 9 to 10, na was adjusted 2 The dosage of O, the thermal expansion coefficient, the elastic modulus and the tensile strength of the obtained twistless roving are all reduced compared with those of the twistless roving in the embodiment 5 of the invention; this is because Li 2 O、Na 2 O and the like can greatly accelerate the melting of the glass and improve the chemical stability, surface tension and crystallization capacity of the glass.
In conclusion, the invention successfully obtains the low-expansion-coefficient direct twistless roving with low thermal expansion coefficient, high breaking strength and bending strength of the pultruded bar and little hairiness by limiting the glass fiber raw material and the components of the coated impregnating compound.
The foregoing is a preferred embodiment of the present invention and modifications and variations such as will occur to those skilled in the art are considered to be within the scope of the present invention without departing from the principles of the present invention as set forth herein.
Claims (4)
1. A method for preparing a low expansion coefficient direct twistless roving, comprising: weighing raw materials in proportion, putting the raw materials into a glass melting furnace, carrying out vitrification and melting treatment, then carrying out spinning forming to obtain glass fibers, coating a sizing agent after cooling, then winding the glass fibers into direct twistless roving with a low expansion coefficient by a direct twistless roving drawing machine, and drying the twistless roving; wherein:
the impregnating compound comprises the following components in parts by weight: 5-15 parts of a silane coupling agent; 10-20 parts of unsaturated polyester resin emulsion; 10-30 parts of water-based epoxy resin emulsion; 1-10 parts of a surfactant; 1-5 parts of a pH regulator; 50-80 parts of deionized water; the silane coupling agent is a mixture of gamma-glycidyl ether propyl trimethoxy silane and divinyl triamino propyl triethoxy silane with the mass ratio of 1; the surfactant is a mixture of fatty alcohol-polyoxyethylene ether and ethylene glycol ricinoleate sodium sulfate in a mass ratio of 1;
the raw materials consist of the following components in percentage by weight:
SiO 2 53-60%；
Al 2 O 3 14-20%；
CaO 10-16%；
MgO 5-10%；
SrO 0.5-1%；
Yb 2 O 3 1-1.5%；
Gd 2 O 3 1-1.5%；
Y 2 O 3 1-1.5%；
B 2 O 3 1-2%；
ZnO 2-3%；
R 2 O 0.4-2%；
yb of the above 2 O 3 、Gd 2 O 3 、Y 2 O 3 1-1.5, wherein the weight ratio is 1; caO, mgO and Al 2 O 3 The weight ratio of (1);
the R is 2 O is Na 2 O、K 2 O and Li 2 A mixture of O; wherein, na 2 O stands for R 2 15-22% of the total weight of O, K 2 O and Li 2 The weight ratio of O is 1.
2. The method of making low expansion coefficient direct twistless roving of claim 1, wherein said starting material comprises, in weight percent:
SiO 2 55-57%；
Al 2 O 3 14-20%；
CaO 10-16%；
MgO 5-7%；
SrO 0.5-1%；
Yb 2 O 3 1-1.5%；
Gd 2 O 3 1-1.5%；
Y 2 O 3 1-1.5%；
B 2 O 3 1-1.8%；
ZnO 2-3%；
R 2 O 1-2%。
3. method for producing low-expansion-coefficient direct twistless rovings according to claim 1 or 2, wherein the Yb is produced from a single roving 2 O 3 、Gd 2 O 3 、Y 2 O 3 The weight ratio is 1.
4. The method of making low expansion coefficient direct twistless rovings of claim 3, wherein the pH adjusting agent is citric acid.
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| CN103739197A (en) * | 2014-01-06 | 2014-04-23 | 江苏中亚新材料股份有限公司 | Production method of glass fiber SMC yarn |
| CN107382372A (en) * | 2017-07-28 | 2017-11-24 | 山东大学 | A kind of aluminum oxide continuous fiber twisted yarn sizing agent special and preparation method thereof |
| CN109320101A (en) * | 2018-11-13 | 2019-02-12 | 山东玻纤集团股份有限公司 | A kind of roof of the vehicle special yarn glass fiber infiltration agent |
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|---|---|---|---|---|
| EP2789592B1 (en) * | 2011-12-06 | 2018-03-21 | Nitto Boseki Co., Ltd | Glass fabric and glass fiber sheet material using same |
| EP3439796A4 (en) * | 2016-04-04 | 2020-02-12 | PPG Industries Ohio, Inc. | Fiberglass containing composites with improved retained glass fiber length, impact strength, and tensile properties |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739197A (en) * | 2014-01-06 | 2014-04-23 | 江苏中亚新材料股份有限公司 | Production method of glass fiber SMC yarn |
| CN107382372A (en) * | 2017-07-28 | 2017-11-24 | 山东大学 | A kind of aluminum oxide continuous fiber twisted yarn sizing agent special and preparation method thereof |
| CN109320101A (en) * | 2018-11-13 | 2019-02-12 | 山东玻纤集团股份有限公司 | A kind of roof of the vehicle special yarn glass fiber infiltration agent |
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