CN116278060A - Epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, preparation method and preparation system thereof - Google Patents

Epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, preparation method and preparation system thereof Download PDF

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Publication number
CN116278060A
CN116278060A CN202211661038.4A CN202211661038A CN116278060A CN 116278060 A CN116278060 A CN 116278060A CN 202211661038 A CN202211661038 A CN 202211661038A CN 116278060 A CN116278060 A CN 116278060A
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Prior art keywords
glass fiber
fiber reinforced
reinforced plastic
wedge
epoxy vinyl
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CN202211661038.4A
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Chinese (zh)
Inventor
翟军明
陈锋
邹云吉
王淑霞
王文杰
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Beijing Composite Material Co Ltd
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Beijing Composite Material Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
    • B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
    • B29C70/525—Component parts, details or accessories; Auxiliary operations
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
    • C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
    • C08J2363/10—Epoxy resins modified by unsaturated compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/14—Peroxides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass

Abstract

The invention relates to the technical field of glass fiber reinforced plastics, in particular to an epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, a preparation method and a preparation system thereof; the preparation method comprises the following preparation steps: s1, according to parts by weight, sequentially mixing 79.4-84.7 parts of bisphenol A epoxy vinyl ester resin, 1.7-2.5 parts of release agent, 0.8-1.6 parts of accelerator, 2.4-4.1 parts of low shrinkage agent, 8.2-11.8 parts of filler and 1.7-2.4 parts of curing agent, uniformly stirring and defoaming to obtain a resin solution; s2, directly yarns of glass fibers and bulked yarns of the glass fibers pass through a yarn dividing plate and are drawn into a glue tank containing resin glue solution to be soaked, so that soaked yarns are obtained; s3, solidifying and forming the immersed yarn, and cutting the yarn into wedge-shaped strips with specific lengths to obtain epoxy vinyl glass fiber reinforced plastic wedge-shaped strips; the technical problems of high density, low production efficiency and high cost of the existing epoxy glass fiber reinforced plastic wedge-shaped strip in the prior art are solved through the design of the epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, the preparation method and the preparation system thereof.

Description

Epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, preparation method and preparation system thereof
Technical Field
The invention relates to the technical field of glass fiber reinforced plastics, in particular to an epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, a preparation method and a preparation system thereof.
Background
Glass fiber reinforced plastics (FRP or GFRP), which are fiber reinforced plastics, are reinforced plastics which use resin as a matrix material and glass fibers and/or products thereof as reinforcing materials. The single glass fiber has high strength in the radial direction, but is loose among the fibers, cannot bear bending, shearing and compressive stress, is not easy to be made into a fixed geometric shape, and is loose; the resin matrix has lower strength and modulus, can withstand larger strain, has viscoelasticity and elastoplasticity, and is a ductile material. The glass fiber reinforced plastic base composite material is formed by bonding resin and fiber together through physical or chemical method, and can be made into various products with fixed shape, which can bear tensile stress and bending, compression and shearing stress.
The wind power generation equipment is mostly provided with glass fiber reinforced plastic wedge-shaped strips made of glass fiber reinforced plastic, and the wedge-shaped strips are used for being installed at the root of the blade to play a role of fixing the bolt sleeve. Along with the development of the blade, the trend of large-scale development is presented, the weight of the blade is multiplied, the epoxy glass fiber reinforced plastic wedge-shaped strip used at the present stage is continuously adopted, and the following defects are gradually highlighted: firstly, the wedge-shaped strips of the epoxy glass fiber reinforced plastic have higher density, so that the total weight of the blade is further increased, and the requirements of lightening and reducing the cost of the blade are not met; secondly, along with the enlargement of the blade, the requirement on the fatigue performance of the product is higher, and the epoxy wedge-shaped strip adopted at the present stage has a slightly inferior fatigue performance; thirdly, the epoxy wedge-shaped strip has the disadvantages of high unit energy consumption and low production efficiency in the production process. In conclusion, searching for raw materials with smaller density and higher cost performance, searching for glass fiber reinforced plastic wedge-shaped strips with high production efficiency and low production cost becomes an important research direction of the glass fiber reinforced plastic industry.
Therefore, in order to solve the above problems, the present invention is highly required to provide an epoxy vinyl glass fiber reinforced plastic wedge strip, a preparation method and a preparation system thereof.
Disclosure of Invention
The invention aims to provide an epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, a preparation method and a preparation system thereof, which are used for solving the technical problems of higher density, low production efficiency and high cost of the existing epoxy glass fiber reinforced plastic wedge-shaped strip in the prior art.
The invention provides a preparation method of an epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, which comprises the following preparation steps:
s1, according to parts by weight, sequentially mixing 79.4-84.7 parts of bisphenol A epoxy vinyl ester resin, 1.7-2.5 parts of release agent, 0.8-1.6 parts of accelerator, 2.4-4.1 parts of low shrinkage agent, 8.2-11.8 parts of filler and 1.7-2.4 parts of curing agent, uniformly stirring and defoaming to obtain a resin solution;
s2, directly yarns of glass fibers and bulked yarns of the glass fibers pass through a yarn dividing plate and are drawn into a glue tank containing resin glue solution to be soaked, so that soaked yarns are obtained;
s3, solidifying and forming the immersed yarn, and cutting the yarn into wedge-shaped strips with specific lengths to obtain the epoxy vinyl glass fiber reinforced plastic wedge-shaped strips.
Preferably, in step S1, the curing agent includes a low-temperature curing agent and a high-temperature curing agent, wherein the low-temperature curing agent is methyl isobutyl ketone peroxide, and the high-temperature curing agent is benzyl tert-butyl peroxy;
the accelerator is an epoxy accelerator;
the low shrinkage agent is polyethylene wax micropowder.
Preferably, in step S1, the weight ratio of methyl isobutyl ketone peroxide to tert-butyl benzyl peroxide is 2:1.
preferably, in step S1, the stirring time is not less than 5min.
Preferably, in step S2, both the glass fiber direct yarn and the glass fiber bulked yarn are 4800tex in size.
Preferably, in step S2, the speed of traction is between 0.15 and 0.3m/min.
Preferably, in step S3, the impregnated yarn is formed by secondary curing, and the pre-forming curing is performed first, and then the secondary curing is performed.
Preferably, in the secondary curing, the temperature of the front area of the curing and forming mold is 120-130 ℃ and the temperature of the rear area is 150-160 ℃.
The invention also provides the epoxy vinyl glass fiber reinforced plastic wedge strip obtained based on the preparation method of the epoxy vinyl glass fiber reinforced plastic wedge strip.
The invention also provides a preparation system for producing the epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, which comprises a glue groove, wherein one side of the glue groove is provided with a yarn dividing plate, and the other side of the glue groove is sequentially provided with a preforming mechanism, a cold die, a curing and forming die, a copper wire traction mechanism and a cutting mechanism.
Compared with the prior art, the epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, the preparation method and the preparation system provided by the invention have the following steps:
1. the invention provides an epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, a preparation method and a preparation system thereof, wherein bisphenol A type epoxy vinyl ester resin undergoes a copolymerization reaction under the action of a curing agent through the formula of the epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, and has certain volume shrinkage in the curing process, and the curing shrinkage rate= (1-rho) is cured according to the volume of the curing resin Front part /ρ Rear part (S) ) The smaller the density of the resin after curing is, the smaller the volume curing shrinkage of the cured resin is, the larger the volume of the obtained cured resin is, so that the glass fiber direct yarns and the glass fiber bulked yarns can be better combined with the resin, the smaller the fiber volume content in unit area is, the density of the product is reduced, the fatigue resistance of the cured glass fiber reinforced plastic is improved on the premise of not affecting the mechanical strength of the product, the production efficiency is improved, and the production process of the product is reducedThe wedge-shaped glass fiber reinforced plastic strip with lighter weight and higher cost performance is manufactured by higher production efficiency and lower production cost.
2. The epoxy vinyl resin is bisphenol A epoxy vinyl ester, and the bisphenol A epoxy vinyl ester only contains cross-linking points of unsaturated double bonds at two ends of a molecular chain, so that the whole molecular chain can be stretched under a stress state, and can absorb mechanical and thermal impact, and has good impact toughness, crack resistance and cracking resistance in terms of macroscopic performance.
3. The glass fiber yarn disclosed by the invention is matched with the bulked yarn and the direct yarn, and the traditional epoxy glass fiber reinforced plastic wedge-shaped strip is used for ensuring the strength of a product, and the single direct yarn is used as the reinforcing body, so that the strength of the glass fiber reinforced plastic wedge-shaped strip in the X direction is met, and meanwhile, the fiber lap joint condition of the bulked yarn in the Y direction of the product is also enhanced to a certain extent.
4. The curing agent of the invention has the functions of generating free radicals so as to initiate the free radical chain polymerization reaction of unsaturated double bond-containing resin, achieve the purpose of crosslinking and curing, adopts the combination of tert-butyl peroxybenzoate and methyl isobutyl ketone peroxide, and the methyl isobutyl ketone peroxide is rapidly decomposed at a lower temperature to generate free radicals so as to initiate the polymerization reaction and emit heat so as to raise the temperature of the system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a system for preparing wedge-shaped strips of epoxy vinyl glass fiber reinforced plastic according to the present invention.
Reference numerals illustrate:
1. a glue groove; 2. yarn dividing plates; 3. a preforming mechanism; 4. cooling; 5. solidifying and forming a mould; 6. copper wire traction mechanism; 7. and a cutting mechanism.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a preparation method of an epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, which comprises the following preparation steps: s1, according to parts by weight, sequentially mixing 79.4-84.7 parts of bisphenol A epoxy vinyl ester resin, 1.7-2.5 parts of release agent, 0.8-1.6 parts of accelerator, 2.4-4.1 parts of low shrinkage agent, 8.2-11.8 parts of filler and 1.7-2.4 parts of curing agent, uniformly stirring and defoaming to obtain a resin solution; s2, directly yarns of glass fibers and bulked yarns of the glass fibers pass through a yarn dividing plate and are drawn into a glue tank containing resin glue solution to be soaked, so that soaked yarns are obtained; s3, solidifying and forming the immersed yarn, and cutting the yarn into wedge-shaped strips with specific lengths to obtain the epoxy vinyl glass fiber reinforced plastic wedge-shaped strips.
Specifically, in the step S1, the curing agent comprises a low-temperature curing agent and a high-temperature curing agent, wherein the low-temperature curing agent is methyl isobutyl ketone peroxide, and the high-temperature curing agent is benzyl tert-butyl peroxy; the accelerator is an epoxy accelerator; the low shrinkage agent is polyethylene wax micropowder.
Specifically, in step S1, the weight ratio of methyl isobutyl ketone peroxide to tert-butyl benzyl peroxide is 2:1.
specifically, in the step S1, the stirring time is more than or equal to 5min.
Specifically, in step S2, the glass fiber direct yarn and the glass fiber bulked yarn are both 4800tex in specification.
Specifically, in step S2, the traction speed is 0.15-0.3m/min.
Specifically, in step S3, the impregnated yarn is formed by secondary curing, and the pre-forming curing is performed first, and then the secondary curing is performed.
Specifically, in the secondary curing, the temperature of the front area of the curing and forming die is 120-130 ℃ and the temperature of the rear area is 150-160 ℃.
The invention also provides the epoxy vinyl glass fiber reinforced plastic wedge strip obtained based on the preparation method of the epoxy vinyl glass fiber reinforced plastic wedge strip.
As shown in FIG. 1, the invention also provides a preparation system for producing the epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, which comprises a glue groove 1, wherein one side of the glue groove 1 is provided with a yarn dividing plate 2, and the other side of the glue groove 1 is sequentially provided with a preforming mechanism 3, a cold die 4, a curing and forming die 5, a copper wire traction mechanism 6 and a cutting mechanism 7.
The invention provides an epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, a preparation method and a preparation system thereof, wherein bisphenol A type epoxy vinyl ester resin undergoes a copolymerization reaction under the action of a curing agent through the formula of the epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, and has certain volume shrinkage in the curing process, and the curing shrinkage rate= (1-rho) is cured according to the volume of the curing resin Front part /ρ Rear part (S) ) The smaller the density of the resin after curing is, the smaller the volume curing shrinkage of the cured resin is, the larger the volume of the obtained cured resin is, so that the glass fiber direct yarns, the glass fiber bulked yarns and the resin can be better combined together, the smaller the fiber volume content in unit area is, the density of the product is reduced, the fatigue resistance of the cured glass fiber reinforced plastic is improved on the premise of not influencing the mechanical strength of the product, meanwhile, the production efficiency is improved, the energy consumption in the production process of the product is reduced, and the glass fiber reinforced plastic wedge-shaped strip with lighter quality and higher cost performance is manufactured with higher production efficiency and lower production cost.
The epoxy vinyl resin is bisphenol A epoxy vinyl ester, and the bisphenol A epoxy vinyl ester only contains cross-linking points of unsaturated double bonds at two ends of a molecular chain, so that the whole molecular chain can be stretched under a stress state, and can absorb mechanical and thermal impact, and has good impact toughness, crack resistance and cracking resistance in terms of macroscopic performance.
The glass fiber yarn disclosed by the invention is matched with the bulked yarn and the direct yarn, and the traditional epoxy glass fiber reinforced plastic wedge-shaped strip is used for ensuring the strength of a product, and the single direct yarn is used as the reinforcing body, so that the strength of the glass fiber reinforced plastic wedge-shaped strip in the X direction is met, and meanwhile, the fiber lap joint condition of the bulked yarn in the Y direction of the product is also enhanced to a certain extent.
The curing agent of the invention has the functions of generating free radicals so as to initiate the free radical chain polymerization reaction of unsaturated double bond-containing resin, achieve the purpose of crosslinking and curing, adopts the combination of tert-butyl peroxybenzoate and methyl isobutyl ketone peroxide, and the methyl isobutyl ketone peroxide is rapidly decomposed at a lower temperature to generate free radicals so as to initiate the polymerization reaction and emit heat so as to raise the temperature of the system.
Example 1
Preparation of sample 1:
as shown in fig. 1, the preparation system of the epoxy vinyl glass fiber reinforced plastic wedge strip is adopted to prepare the epoxy vinyl glass fiber reinforced plastic wedge strip in the embodiment, and the production process is as follows:
(1) Preparing equipment and threading the equipment, fixing the glass fiber direct yarns and the glass fiber bulked yarns on a traction copper wire, guiding the yarns by the equipment, preheating a curing and forming die 5, wherein the temperature of a front area is 120-130 ℃, the temperature of a rear area is 150-160 ℃, and preheating for 1.5-2 hours;
(2) Preparing a resin solution: 79.4 parts of bisphenol A epoxy vinyl ester resin, 2.4 parts of release agent, 1.6 parts of epoxy accelerator, 2.4 parts of polyethylene wax micropowder, 11.8 parts of filler, 1.6 parts of methyl isobutyl ketone peroxide and 0.8 part of benzyl tert-butyl peroxide are mixed in sequence, stirred by a dispersing machine, and transferred into a glue tank 1 after standing and defoaming;
(3) And (3) section bar production: starting the equipment, enabling a copper wire traction mechanism 6 to pull glass fiber yarns to penetrate through a resin solution through a puller to dip, controlling the traction speed to be 0.15-0.3m/min, pulling the dipped yarns into a preforming mechanism 3, pulling the yarns into a cold mold 4 to be cured, continuously pulling the preformed product formed by curing out of the cold mold 4, continuously pulling the preformed product out of the cold mold 4, and enabling the preformed product to be cured again through a curing mold 5;
(4) Cutting the section bar: cutting the product obtained after the solidification and molding in the step (3) into wedge-shaped strips with specific length by a cutting mechanism 7 to prepare the epoxy vinyl glass fiber reinforced plastic wedge-shaped strips.
The properties of sample 1 are shown in Table 1, the fiber volume content is 50%, and the density of the product is 1.8979g/cm according to the standard GB/T1463-2005 3 According to the standard ISO 527-5, the X-direction tensile strength of the product is 501.96MPa, the X-direction tensile modulus is 38.00GPa, and the Y-direction tensile strength is 34.21MPa.
Example two
Preparation of sample 2:
sample 2 was prepared in the same manner as sample 1, except that the content of each component in the resin solution in step (2) of sample 1 was different, and the resin solution in sample 2 was: 81.3 parts of bisphenol A epoxy vinyl ester resin, 2.4 parts of release agent, 1.6 parts of epoxy accelerator, 4.1 parts of polyethylene wax micropowder, 8.2 parts of filler, 1.6 parts of methyl isobutyl ketone peroxide and 0.8 part of benzyl tert-butyl peroxide.
The properties of sample 2 are tested, see table 1, and sample 2 is compared to sample 1: the product density, X-direction tensile strength, X-direction tensile modulus, and Y-direction tensile strength of sample 1 were all superior to those of sample 2.
Example III
Preparation of sample 3:
sample 3 was prepared in the same manner as sample 1, except that the content of each component in the resin solution in step (2) of sample 1 was different, and the resin solution of sample 3: 82.6 parts of bisphenol A epoxy vinyl ester resin, 2.5 parts of release agent, 0.8 part of epoxy accelerator, 4.1 parts of polyethylene wax micropowder, 8.3 parts of filler, 1.13 parts of methyl isobutyl ketone peroxide and 0.57 part of benzyl tert-butyl peroxide.
The properties of sample 3 are tested, see table 1, and sample 3 compares to sample 1: the X-direction tensile strength, X-direction tensile modulus, and Y-direction tensile strength of sample 1 are all superior to those of sample 3, and the product density of sample 1 is slightly greater than that of sample 3.
Example IV
Preparation of sample 4:
sample 4 was prepared in the same manner as sample 1, except that the content of each component in the resin solution in step (2) of sample 1 was different, and the resin solution of sample 4: 84.7 parts of bisphenol A epoxy vinyl ester resin, 1.7 parts of release agent, 0.8 part of epoxy accelerator, 2.5 parts of polyethylene wax micropowder, 8.6 parts of filler, 1.13 parts of methyl isobutyl ketone peroxide and 0.57 part of benzyl tert-butyl peroxide.
The properties of sample 4 are tested, see table 1, and sample 4 is compared to sample 1: the X-direction tensile strength, the X-direction tensile modulus, and the Y-direction tensile strength of sample 1 are all superior to those of sample 4, and the product density of sample 1 is greater than that of sample 4.
Comparative example one
Preparation of comparative example 1:
comparative example 1 was identical to the preparation method of sample 4 except that the composition of the resin solution prepared in step (2) was different, and the bisphenol a epoxy vinyl ester resin in the resin solution of comparative example 1 was replaced with an unsaturated polyester resin.
The performance of comparative example 1 is shown in table 1, and the fiber volume content of comparative example 1 is higher than that of comparative example 1 by comparing sample 4 with comparative example 1, so that the tensile strength in the X direction, the tensile modulus in the X direction and the tensile strength in the Y direction of comparative example 1 are all obviously better than that of sample 4, but the density of comparative example 1 is obviously higher than that of sample 4, and the direct yarn and the bulked yarn can only improve the tensile strength of the product, but cannot reduce the density of the product.
Comparative example two
Preparation of comparative example 2:
comparative example 2 was identical to the preparation of sample 4 except that only glass fiber bulked yarn was used to fix on the traction copper wire in step (1), the composition of the resin solution prepared in step (2) was different, and bisphenol a epoxy vinyl ester resin was replaced with unsaturated polyester resin in the resin solution of comparative example 2.
The performance of comparative example 2 is shown in table 1, and the fiber volume content of comparative example 2 is higher than that of sample 4 by comparing sample 4 with comparative example 2, so that the tensile strength in the X direction, the tensile modulus in the X direction and the tensile strength in the Y direction of comparative example 2 are all better than that of sample 4, but the density of comparative example 2 is obviously higher than that of sample 4, and the tensile strength of the product is improved by adopting unsaturated polyester resin and bulked yarn, but the fiber volume content in unit volume is higher, so that the density of the product cannot be reduced.
TABLE 1 epoxy vinyl glass fiber reinforced plastic wedge strip Performance test results
Figure BDA0004013923580000091
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. The preparation method of the epoxy vinyl glass fiber reinforced plastic wedge-shaped strip is characterized by comprising the following preparation steps:
s1, according to parts by weight, sequentially mixing 79.4-84.7 parts of bisphenol A epoxy vinyl ester resin, 1.7-2.5 parts of release agent, 0.8-1.6 parts of accelerator, 2.4-4.1 parts of low shrinkage agent, 8.2-11.8 parts of filler and 1.7-2.4 parts of curing agent, uniformly stirring and defoaming to obtain a resin solution;
s2, directly yarns of glass fibers and bulked yarns of the glass fibers pass through a yarn dividing plate and are drawn into a glue tank containing resin glue solution to be soaked, so that soaked yarns are obtained;
s3, solidifying and forming the immersed yarn, and cutting the yarn into wedge-shaped strips with specific lengths to obtain the epoxy vinyl glass fiber reinforced plastic wedge-shaped strips.
2. The method for preparing the wedge-shaped strip of epoxy vinyl glass fiber reinforced plastic according to claim 1, wherein,
in the step S1, the curing agent comprises a low-temperature curing agent and a high-temperature curing agent, wherein the low-temperature curing agent is methyl isobutyl ketone peroxide, and the high-temperature curing agent is benzyl tert-butyl peroxy;
the accelerator is an epoxy accelerator;
the low shrinkage agent is polyethylene wax micropowder.
3. The method for preparing the wedge-shaped strip of epoxy vinyl glass fiber reinforced plastic according to claim 2, wherein in the step S1, the weight ratio of the methyl isobutyl ketone peroxide to the benzyl tert-butyl peroxide is 2:1.
4. the method for preparing the wedge-shaped strip of epoxy vinyl glass fiber reinforced plastic according to claim 3, wherein in the step S1, the stirring time is more than or equal to 5 minutes.
5. The method for producing wedge-shaped strips of epoxy vinyl glass fiber reinforced plastic according to claim 4, wherein in step S2, both the glass fiber direct yarn and the glass fiber bulked yarn are 4800tex.
6. The method for producing wedge-shaped strips of epoxy vinyl glass fiber reinforced plastic according to claim 5, wherein in step S2, the pulling speed is 0.15-0.3m/min.
7. The method of manufacturing a wedge-shaped strip of epoxy vinyl glass fiber reinforced plastic according to claim 6, wherein in step S3, the impregnated yarn is formed by secondary curing, and the pre-forming curing is performed first and then the secondary curing is performed.
8. The method for preparing wedge-shaped strips of epoxy vinyl glass fiber reinforced plastic according to claim 7, wherein the temperature of the front area of the curing and forming die is 120-130 ℃ and the temperature of the rear area is 150-160 ℃ during the secondary curing.
9. An epoxy vinyl glass fiber reinforced plastic wedge strip obtained based on the method for preparing an epoxy vinyl glass fiber reinforced plastic wedge strip according to any one of claims 1-8.
10. A preparation system for producing the epoxy vinyl glass fiber reinforced plastic wedge-shaped strip according to claim 9, which is characterized by comprising a glue groove (1), wherein one side of the glue groove (1) is provided with a yarn dividing plate (2), and the other side of the glue groove (1) is sequentially provided with a preforming mechanism (3), a cold mold (4), a curing forming mold (5), a copper wire traction mechanism (6) and a cutting mechanism (7).
CN202211661038.4A 2022-12-23 2022-12-23 Epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, preparation method and preparation system thereof Pending CN116278060A (en)

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CN202211661038.4A CN116278060A (en) 2022-12-23 2022-12-23 Epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, preparation method and preparation system thereof

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CN202211661038.4A CN116278060A (en) 2022-12-23 2022-12-23 Epoxy vinyl glass fiber reinforced plastic wedge-shaped strip, preparation method and preparation system thereof

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