CN115339017A - Plastic coating device for preparing fiber bundles and fiber bundle preparation system and process - Google Patents
Plastic coating device for preparing fiber bundles and fiber bundle preparation system and process Download PDFInfo
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- CN115339017A CN115339017A CN202210967707.4A CN202210967707A CN115339017A CN 115339017 A CN115339017 A CN 115339017A CN 202210967707 A CN202210967707 A CN 202210967707A CN 115339017 A CN115339017 A CN 115339017A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
- B29B15/125—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/14—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length of filaments or wires
Abstract
The invention discloses a plastic coating device for preparing fiber bundles, a fiber bundle preparation system and a fiber bundle preparation process, wherein the plastic coating device comprises a shell, a first infiltration cavity, a second infiltration cavity and a third infiltration cavity are arranged in the shell, the first infiltration cavity is arranged in the second infiltration cavity, and an infiltration liquid feeding cavity is arranged above the second infiltration cavity; the second infiltration cavity and the third infiltration cavity are separated by a baffle; a pair of press rollers are respectively arranged in the second infiltration cavity and the third infiltration cavity; according to the invention, the structure of the plastic coating device in the fiber bundle preparation process is improved, the plastic is melted by the single-screw extruder and then extruded into the infiltration cavity, and the fiber band is subjected to series of shearing such as unfolding, infiltration and extrusion for multiple times in the infiltration cavity without damaging the fiber structure, so that the infiltration efficiency is improved, a high-viscosity melt can be satisfied, and the plastic coating device is suitable for a thermoplastic plastic substrate as an infiltration liquid.
Description
Technical Field
The invention relates to the technical field of fiber bundle preparation, in particular to a plastic coating device for preparing a fiber bundle and a fiber bundle preparation process.
Background
The fiber reinforced material comprises three major types, namely short fiber reinforced composite material, long fiber reinforced composite material and continuous fiber reinforced composite plastic, wherein the short fiber reinforced composite plastic is used in the largest amount. The early preparation method of the short fiber reinforced composite plastic comprises the steps of extruding, mixing and granulating continuous fiber yarns and matrix resin through a double-screw extruder to obtain short fiber reinforced plastic particles, and processing the plastic particles into products through processing modes such as extrusion or injection molding, wherein in the products obtained through the mode, the fiber length is extremely short, and the products do not have the potential of growth due to the limitation of granulation; at present, most of methods are to prepare cluster fibers, to use polar resin to coat continuous fiber yarns, to cut the continuous fiber yarns into required lengths, to be uniformly mixed with a matrix during use, and to perform injection molding or extrusion molding, so that the fibers are only cut once, and the fiber length in a finished product is longer.
The core of the existing fiber bundle production technology is the over-molding (infiltration) of matrix resin to the fiber bundle, good dispersion can be achieved only by full infiltration, and the existing fiber bundle preparation process generally leads the fiber bundle to directly pass through a mold cavity filled with melt under the action of traction force so as to achieve the purpose of over-molding the fiber bundle, and the method has the following problems: firstly, only the surface of the fiber bundle can be infiltrated, and the fibers in the fiber bundle cannot be fully infiltrated; secondly, the problem of uneven infiltration exists. The existing fiber bundle plastic passing device can only use a melt or a solvent with lower viscosity to infiltrate the fiber bundle, is only suitable for partial resin, and cannot be suitable for matrix resin with higher molecular viscosity, because the matrix resin is agglomerated on the fiber bundle, the fiber concentration of the bundled fibers is reduced along with the good dispersion of the fibers, and the application limit is larger.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a laminator device for preparing a fiber bundle, a fiber bundle preparation system and a fiber bundle preparation process.
The technical scheme of the invention is as follows:
the first aspect provides a laminator device for preparing fiber bundles, which comprises a shell, wherein a first infiltration cavity, a second infiltration cavity and a third infiltration cavity are arranged in the shell, the first infiltration cavity is arranged in the second infiltration cavity, and an infiltration liquid feeding cavity is arranged above the second infiltration cavity; the second infiltration cavity and the third infiltration cavity are separated by a baffle; a pair of press rollers are respectively arranged in the second infiltration cavity and the third infiltration cavity.
In some embodiments of the invention, a single screw extruder is disposed within the feed chamber.
In some embodiments of the present invention, the first infiltration chamber is a cross-shaped structure, the upper and lower positions of the first infiltration chamber are provided with feed holes to form a feed channel, the left and right positions of the first infiltration chamber are provided with fiber bundle inlet and outlet holes to form a fiber bundle channel, and the feed channel and the fiber bundle channel are perpendicular to and communicated with each other.
In some embodiments of the invention, the fiber bundle inlet orifice of the first infiltration chamber is a flat-type orifice and the fiber bundle outlet orifice is a circular orifice.
In some embodiments of the present invention, the third infiltration chamber is provided with a circular fiber bundle inlet and a circular fiber bundle outlet, the fiber bundle inlet is arranged on the baffle plate, and the fiber bundle outlet is arranged on the shell.
In some embodiments of the invention, the fiber bundle access hole of the first infiltration chamber and the fiber bundle access hole of the third infiltration chamber are centered on the same line.
In some embodiments of the invention, the fiber bundle exit orifice of the first infiltration chamber and the fiber bundle exit orifice of the third infiltration chamber have the same pore size, and the fiber bundle entry orifice of the third infiltration chamber is 1.5 to 2 times the pore size of the exit orifice.
In a second aspect, a fiber bundle preparation system is provided, which comprises the over-molding device of the first aspect, a traction device, a rolling device and a heating device; the plastic coating device is used for realizing multiple infiltration of the fiber belt and realizing plastic coating; the traction device consists of three rollers which are arranged in a triangle and used for drawing the fiber from the fiber coil to realize uncoiling; the rolling device is a pair of rollers and is used for further rolling the fiber belt to unfold the fiber belt; the heating device is a heating cylinder and is used for preheating the flat fiber before plastic coating so as to enable the flat fiber to be compounded with the plastic matrix.
In a third aspect, a fiber bundle preparation process is provided, comprising the steps of:
(1) Drawing, wherein the fiber roll is drawn and unfolded into fiber flat filaments through a roller;
(2) Rolling, further rolling the fiber flat filament by a rolling device to spread the fiber flat filament as far as possible;
(3) Heating, namely preheating the flat fiber by a heating device;
(4) Performing plastic coating, namely infiltrating and plastic coating the fiber flat filaments by using a plastic coating device to obtain fiber bundles;
(5) Secondary rolling, namely rolling the fiber bundles subjected to plastic coating into a microfiber belt by a rolling device;
(6) Drawing and cooling, namely cooling the fiber belt by adopting an air cooling or water cooling mode;
(7) And (3) rolling, namely rolling the cooled and formed fiber belt or fiber bundle by using a rolling device or cutting the fiber belt or fiber bundle into sheets or particles required by application by using a granulator.
In some embodiments of the present invention, the specific process of the overmolding in the step (4) is: the fiber flat filament enters the first infiltration cavity for infiltration through the fiber bundle inlet hole, and then is forcibly pressed into a cylindrical fiber bundle by the fiber bundle outlet hole and enters the second infiltration cavity; in the second infiltration cavity, the cylindrical fiber bundle is rolled and unfolded by a press roller to form a fiber belt, secondary infiltration is carried out, the infiltrated fiber belt is extruded into the cylindrical fiber bundle again by the fiber bundle inlet hole on the baffle plate, and the cylindrical fiber bundle enters the third infiltration cavity; in the third infiltration cavity, the cylindrical fiber bundle is rolled and unfolded by the compression roller for the second time to form a fiber belt, the fiber belt is infiltrated for the third time, the fiber belt is extruded into a cylinder by a fiber bundle outlet hole on the shell of the plastic passing device, and the fiber belt is discharged from the plastic passing device to finish the plastic passing process of the fiber bundle.
The invention has the technical characteristics and beneficial effects that:
in the preparation of the conventional bundling fiber, the infiltration of matrix resin to a fiber bundle mainly depends on low-viscosity liquid to permeate to the surface of the fiber, the structure of a plastic passing device in the preparation process of the fiber bundle is improved, plastic is melted by a single-screw extruder and then extruded into an infiltration cavity, and in the infiltration cavity, the fiber band is sheared for multiple times without damaging the fiber structure, so that the infiltration efficiency is improved, the requirement on high-viscosity melt is met, and the high-viscosity fiber is suitable for serving as an infiltration liquid for a thermoplastic plastic matrix.
The invention soaks the fiber bundle to make the fiber bundle undergo three soakings in the preparation process, and through two pairs of compression rollers arranged, the shearing action in the soakingprocess is strengthened, meanwhile, the fiber form is kept unchanged, the fiber soakingeffect can be greatly enhanced, the current situation that only low-viscosity superplastic melts or solvents are used in the industry is got rid of, the fiber application range is greatly expanded, and the obtained cluster fiber can be used as a fiber master batch for adding and using, can be used as a special material for direct use, and can also be used for compatibility modification.
The fiber bundle preparation process of the invention also uses the heating device to heat the fiber flat filament before the fiber bundle is subjected to plastic processing, so as to prevent the fiber flat filament and plastic melt from increasing brittleness or poor compounding of the fiber and the melt due to larger temperature difference and improve the infiltration effect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of a laminator for preparing fiber bundles according to the present invention;
FIG. 2 is a flow chart of a fiber bundle preparation process of the present invention;
FIG. 3 is a schematic view of a first infiltration chamber according to the present invention;
fig. 4 is a cross-sectional view taken at positions a, B and C in fig. 3.
In the figure: 1. a fiber tape; 2. a feed port; 3. a first fiber bundle inlet; 4. a first infiltration chamber; 5. a first fiber bundle exit hole; 6. a single screw extruder; 7. a feed cavity; 8. a baffle plate; 9. a third infiltration chamber; 10. a second fiber bundle outlet; 11. a housing; 12. a second press roll; 13. a second fiber bundle enters the hole; 14. a first press roll; 15. a second infiltration chamber.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In an embodiment of the present invention, a laminator device for preparing fiber bundles is provided, as shown in fig. 1, including a housing 11, a first infiltration chamber 4, a second infiltration chamber 15 and a third infiltration chamber 9 are disposed in the housing 11, the first infiltration chamber 4 is disposed inside the second infiltration chamber 15, and an infiltration liquid feeding chamber 7 is disposed above the second infiltration chamber 15; the second infiltration cavity 15 and the third infiltration cavity 9 are separated by a baffle plate 8; a pair of press rollers are respectively arranged in the second infiltration cavity 15 and the third infiltration cavity 9, specifically, a first press roller 14 is arranged in the second infiltration cavity 15, and a second press roller 12 is arranged in the third infiltration cavity 9.
The feeding cavity 7 is provided with a single-screw extruder 6, the single-screw extruder has a certain temperature, can rotate in the feeding cavity 7 to melt plastics to serve as an immersion liquid, and the melted plastics are extruded into a second immersion cavity 15.
As shown in fig. 3, the first infiltration chamber 4 is a cross-shaped structure, the upper and lower positions of which are provided with the feed holes 2 to form a feed channel, the left and right positions of which are provided with the first fiber bundle inlet 3 and the first fiber bundle outlet 5 to form a fiber bundle channel, the feed channel and the fiber bundle channel are perpendicular to each other and are communicated with each other, the plastic substrate enters the first infiltration chamber 4 from the second infiltration chamber 15 through the feed holes 2, and meanwhile, the feed holes 2 which are oppositely arranged can cooperate with the first fiber bundle outlet 5 to form an irregular melt flow direction, so that the infiltration effect of the melt on the flat fiber is enhanced.
As shown in fig. 4, the first fiber bundle inlet 3 is a flat hole, the first fiber bundle outlet is a circular hole, the flat hole is adapted to the shape of the fiber tape 1, and after the fiber tape 1 enters the first infiltration chamber, the fiber tape is forced to be extruded into a cylindrical fiber bundle from a flat filament shape in the infiltration process, so as to enhance the infiltration of the fibers.
The first pressing roller 14 arranged in the second infiltration chamber 15 is used for rolling the cylindrical fiber bundles into fiber belts in the secondary infiltration process of the fiber bundles, so that the shearing action in the infiltration process is enhanced.
The third infiltration chamber 9 is provided with a second fiber bundle inlet hole 13 and a second fiber bundle outlet hole 10, both the second fiber bundle inlet hole 13 and the second fiber bundle outlet hole 10 are circular, wherein the second fiber bundle inlet hole 13 is arranged on the baffle 8, the second fiber bundle outlet hole 10 is arranged on the shell 1, the shell at the second fiber bundle outlet hole 10 is tapered, the infiltration liquid in the second infiltration chamber 15 enters the third infiltration chamber 9 through the second fiber bundle inlet hole 13, and the second fiber bundle inlet hole 13 is used for extruding the fiber belts in the second infiltration chamber 15 into cylindrical fiber bundles, and simultaneously, redundant materials are filtered out.
And a second press roller 12 arranged in the third infiltration cavity 9 is used for rolling the cylindrical fiber bundles into fiber belts in the three infiltration processes of the fiber bundles, further enhancing the shearing action in the infiltration process, and then extruding the fiber belts into the fiber bundles through the second fiber bundle outlet holes 10.
Further, the centers of the first fiber bundle inlet hole 3, the first fiber bundle outlet hole 5, the second fiber bundle inlet hole 13, and the second fiber bundle outlet hole 10 are aligned in the same line.
Furthermore, a single-screw extruder is arranged in the feeding cavity, the melt pressure in the second infiltration cavity is controlled to be 0.2-0.5MPa by controlling the rotating speed of the single-screw extruder, and the melt pressure is controlled within a reasonable range, so that the infiltration effect can be improved, and the deformation of the die can be prevented.
Furthermore, the aperture of the first fiber bundle outlet 5 is the same as that of the second fiber bundle outlet 10 and is marked as R, the aperture of the second fiber bundle inlet is 1.5-2 times of that of the second fiber bundle outlet, namely 1.5R-2R, the value of the aperture of the outlet R is determined by factors such as specific fiber types, fiber thicknesses and the like, and the aperture R determines the content of fibers in finished products of fiber bundles of the same type; the aperture of the inlet of the second fiber bundle is 1.5R-2R, which is determined by the melt viscosity, the aperture with higher melt viscosity is larger, the aperture with lower melt viscosity is smaller, the melt pressure in the third infiltration cavity 9 is controlled by the aperture change of the inlet, and the fiber content in the prepared fiber bundle can be controlled by changing the aperture in the plastic passing device.
The plastic coating device for preparing the fiber bundle enables the fiber bundle to be subjected to the processes of unfolding, soaking and extruding for multiple times in the soaking process, so that the fiber bundle is soaked more uniformly, and the soaking effect is improved;
in addition, the size of the aperture R in the plastic passing device can be adjusted according to specific requirements, the high fiber content can be configured with a small aperture, the low fiber content can be configured with a large aperture, the aperture of the second fiber bundle inlet is 1.5R-2R, the judgment is carried out according to the melt viscosity, the upper limit (2 times) is set to ensure that the second fiber bundle inlet still can extrude the fiber bundle into a column shape and has a certain shearing action, and the lower limit (1.5 times) is set to ensure that a certain melt flows into the third infiltration cavity and a certain pressure is kept in the third infiltration cavity.
In another embodiment of the present invention, a fiber bundle preparation system is provided, which includes the above-mentioned plastic coating device, and further includes a traction device, a rolling device and a heating device, wherein the plastic coating device is used for implementing multiple infiltrations on a fiber belt to implement plastic coating; the traction device consists of three rollers which are arranged in a triangle and used for drawing the fiber from the fiber coil to realize uncoiling, so that the fiber belt can be relatively tightened and cannot be deviated; the rolling device is a pair of rollers and is used for further rolling the fiber belt so that the fiber belt can be unfolded; the heating device is a heating cylinder and is used for preheating the flat fiber before plastic coating so as to enable the flat fiber to be compounded with the plastic matrix.
Compared with the existing fiber bundle preparation system, the plastic coating device is improved, the infiltration effect is improved, meanwhile, the heating device is added, the fiber flat filament is preheated before plastic coating, the increase of fiber brittleness or poor combination of the fiber and the melt due to large temperature difference between the fiber flat filament and the plastic melt is prevented, and the composite effect of the fiber flat filament and the plastic melt is improved.
In yet another embodiment of the present invention, as shown in FIG. 2, there is provided a fiber bundle preparation process comprising the steps of:
(1) Drawing, wherein the fiber roll is drawn and unfolded into fiber flat filaments through a roller;
(2) Rolling, namely further rolling the flat fiber yarns by a rolling device to spread the flat fiber yarns as far as possible;
(3) Heating, namely preheating the flat fiber through a heating device, and preventing the increase of fiber brittleness or poor composition of the fiber and the melt due to larger temperature difference between the flat fiber and the plastic melt so as to improve the composite effect of the flat fiber and the plastic melt;
(4) Performing plastic coating, namely soaking and plastic coating on the fiber flat filaments by using a plastic coating device to obtain fiber bundles;
(5) Secondary rolling, namely rolling the fiber bundle subjected to plastic coating into a fiber belt again through a rolling device, wherein the step can be omitted, and a cylindrical fiber bundle is obtained;
(6) Drawing and cooling, namely cooling the fiber band or the fiber bundle in an air cooling or water cooling mode to form the fiber band or the fiber bundle;
(7) And (3) rolling, namely rolling the cooled and formed fiber belt or fiber bundle by using a rolling device or cutting the fiber belt or fiber bundle into sheets or particles required by application by using a granulator.
Further, the specific process of the plastic coating in the step (4) is as follows: the fiber flat filament enters the first infiltration cavity through the first fiber bundle inlet hole to be infiltrated, the first fiber bundle hole is a flat hole and can guide the fiber flat filament, meanwhile, redundant plastic melt can be discharged from the first fiber bundle inlet hole, then the fiber flat filament is forced to be pressed into a cylindrical fiber bundle through the first fiber bundle outlet hole, infiltration of fibers can be enhanced, but the central area of the flat filament is still not infiltrated at the moment, the melt viscosity is high, the penetration is not easy to be deeper, and the cylindrical fiber bundle enters the second infiltration cavity.
In the second infiltration cavity, the melt pressure in the cavity is 0.2-0.5MPa, the higher melt pressure is favorable for further infiltration of the melt to the fiber bundle, but the melt pressure cannot be too high, the too high pressure can cause the outward discharge pressure of the melt to be large, the fiber traction is difficult, and even the occurrence of the broken filament condition can be caused, the cylindrical fiber bundle is rolled and unfolded into a fiber belt by a compression roller, meanwhile, the plastic melt wrapped in the cylindrical fiber bundle is sheared by the compression roller and secondarily infiltrated with the fiber belt, the infiltrated fiber belt is re-extruded into the cylindrical fiber bundle by the fiber bundle inlet hole on the baffle plate, the shearing effect is generated on the plastic melt to promote the further infiltration, and the redundant materials are filtered and enter the third infiltration cavity.
In the third infiltration cavity, the cylindrical fiber bundle is rolled and unfolded by the second pressing roller for the second time to form a fiber belt, the fiber belt is infiltrated for the third time, the fiber belt is extruded into a cylinder by the second fiber bundle outlet on the shell of the plastic passing device, the fiber belt is sheared and mixed twice by the pressing roller and the second fiber bundle outlet and is discharged from the plastic passing device, and the plastic passing process of the fiber bundle is completed.
The following is a detailed description with reference to specific examples:
example 1
The preparation raw materials of the fiber bundle are selected as follows: taishan glass fiber TCR735, yueyang petrochemical PA6YH800, optical compatilizer POE-g-MAHN402, and chemical antioxidant 1098;
uniformly mixing the following materials in parts by weight:
yueyang petrochemical PA6YH800:85-95 parts of (A) and (B),
the photo-compatilizer POE-g-MAHN402:5-15 parts of (A) a stabilizer,
very easy chemical antioxidant 1098:0.5-3 parts;
adding the uniformly mixed materials into a single-screw extruder, wherein the set temperature of a single screw is 230-260 ℃, the aperture R of a first fiber bundle outlet of a plastic coating device is 1.2mm, the aperture R of a second fiber bundle inlet of the plastic coating device is 2.4mm, the aperture R of a second fiber bundle outlet of the plastic coating device is 1.2mm, and the pressure of a second infiltration cavity is controlled to be 0.5MPa, so as to obtain bundled fiber particles according to the preparation process of the fiber bundles, wherein the content of test fibers is 78%.
Example 2
The preparation raw materials of the fiber bundle are selected as follows: taishan glass fiber TCR735, yueyang petrochemical PA6YH800, an optical compatilizer POE-g-MAHN402, and an extremely easy chemical antioxidant 1098;
uniformly mixing the following materials in parts by weight:
yueyang petrochemical PA6YH800:85-95 parts of (A) and (B),
the photo-compatilizer POE-g-MAHN402:5-15 parts of (A) a stabilizer,
very easy chemical antioxidant 1098:0.5-3 parts;
adding the uniformly mixed materials into a single-screw extruder, wherein the set temperature of a single screw is 230-260 ℃, the aperture R of a first fiber bundle outlet of a plastic passing device is 2mm, the aperture R of a second fiber bundle inlet is 4mm, the aperture R of a second fiber bundle outlet is 2mm, the pressure of a second infiltration cavity is controlled to be 0.5MPa, and bundling fiber particles are obtained according to the preparation process of the fiber bundle, and the content of tested fibers is 42%.
Example 3
The preparation raw materials of the fiber bundle are selected as follows: than glass fiber TCR735, a photo-compatibilising agent PP-g-MAHN406.
Adding the uniformly mixed materials into a single-screw extruder, wherein the set temperature of a single screw is 200-240 ℃, the aperture R of a first fiber bundle outlet of a plastic passing device is 1.2mm, the aperture R of a second fiber bundle inlet of the plastic passing device is 1.95mm, the aperture R of a second fiber bundle outlet of the plastic passing device is 1.2mm, and the pressure of a second infiltration cavity is controlled to be 0.3Mpa, so as to obtain bundled fiber particles according to the preparation process of the fiber bundles, wherein the content of tested fibers is 67%.
Example 4
The preparation raw materials of the fiber bundle are selected as follows: zhongfushenying hawk SYT-49S-12K, yueyang petrochemical PA6YH800, a functional optical compatilizer POE-g-MAHN402, and an extremely easy chemical antioxidant 1098;
uniformly mixing the following materials in parts by weight:
yueyang petrochemical PA6YH800:85-95 parts of (A) and (B),
the photo-compatiblizing agent POE-g-MAHN402:5-15 parts of (A) a stabilizer,
easily-chemical antioxidant 1098:0.5-3 parts;
adding the uniformly mixed materials into a single-screw extruder, wherein the set temperature of a single screw is 230-260 ℃, the aperture R of a first fiber bundle outlet of a plastic passing device is 1.2mm, the aperture R of a second fiber bundle inlet of the plastic passing device is 2.4mm, the aperture R of a second fiber bundle outlet of the plastic passing device is 1.2mm, and the pressure of a second infiltration cavity is controlled to be 0.2MPa, thus obtaining bundled fiber particles according to the preparation process of the fiber bundles, wherein the content of test fibers is 34 percent
It can be seen from examples 1-4 that the process can be used to customize fiber reinforced plastics with different fiber contents and different matrixes according to specific requirements, and can be used to prepare fiber reinforced plastic master batches (fiber bundle master batches, example 3) with high fiber content, and also can be used to prepare different types of fiber reinforced plastics (for direct molding, example 1/2/4) with high and low contents.
The embodiments described above are intended to illustrate the technical solutions of the present invention in detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modification, supplement or similar substitution made within the scope of the principles of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A plastic coating device for preparing fiber bundles is characterized by comprising a shell, wherein a first soaking cavity, a second soaking cavity and a third soaking cavity are arranged in the shell, the first soaking cavity is arranged in the second soaking cavity, and a soaking liquid feeding cavity is arranged above the second soaking cavity; the second infiltration cavity and the third infiltration cavity are separated by a baffle; a pair of press rollers are respectively arranged in the second infiltration cavity and the third infiltration cavity.
2. A laminator for preparing fiber bundles according to claim 1, wherein a single screw extruder is disposed within the feed cavity.
3. The apparatus of claim 1, wherein the first infiltration chamber is cross-shaped, and has feed holes at upper and lower positions to form feed channels, and fiber bundle inlet and outlet holes at left and right positions to form fiber bundle channels, and the feed channels and the fiber bundle channels are perpendicular to and in communication with each other.
4. A laminator device according to claim 3, wherein the tow inlet aperture of the first impregnation chamber is a flat aperture and the tow outlet aperture is a circular aperture.
5. A laminator for preparing fiber bundles according to claim 4, wherein the third impregnation chamber is provided with a circular fiber bundle inlet and a circular fiber bundle outlet, the fiber bundle inlet is provided on the baffle, and the fiber bundle outlet is provided on the housing.
6. The overmolding device for preparing fiber bundles according to claim 5, wherein centers of the fiber bundle access hole of the first infiltration chamber and the fiber bundle access hole of the third infiltration chamber are on a same straight line.
7. A laminator device according to claim 6, wherein the fiber bundle outlet of the first impregnation chamber and the fiber bundle outlet of the third impregnation chamber have the same aperture, and the fiber bundle inlet of the third impregnation chamber is 1.5-2 times the aperture of the outlet.
8. A fiber bundle preparation system comprising the overmoulding device of any one of claims 1 to 7, further comprising a drawing device, a rolling device and a heating device; the plastic coating device is used for realizing multiple infiltration of the fiber belt and realizing plastic coating; the traction device consists of three rollers which are arranged in a triangular shape and used for drawing the fiber from the fiber coil to realize uncoiling; the rolling device is a pair of rollers and is used for further rolling the fiber belt to spread the fiber belt; the heating device is a heating cylinder and is used for preheating the fiber flat filament before plastic coating so as to promote the fiber flat filament to be compounded with the plastic matrix.
9. A fiber bundle preparation process implemented using the fiber bundle preparation system of claim 8, comprising the steps of:
(1) Drawing, wherein the fiber roll is drawn and unfolded into fiber flat filaments through a roller;
(2) Rolling, further rolling the fiber flat filament by a rolling device to spread the fiber flat filament as far as possible;
(3) Heating, namely preheating the flat fiber by a heating device;
(4) Performing plastic coating, namely infiltrating and plastic coating the fiber flat filaments by using a plastic coating device to obtain fiber bundles;
(5) Secondary rolling, namely rolling the fiber bundles subjected to plastic coating into a microfiber belt by a rolling device;
(6) Drawing and cooling, namely cooling the fiber belt by adopting an air cooling or water cooling mode;
(7) And (3) rolling, namely rolling the cooled and formed fiber belt or fiber bundle by using a rolling device or cutting the fiber belt or fiber bundle into sheets or particles required by application by using a granulator.
10. The fiber bundle preparation process according to claim 9, wherein the superplasticizing process in the step (4) comprises the following steps: the fiber flat filament enters the first infiltration cavity for infiltration through the fiber bundle inlet hole, and then is forcibly pressed into a cylindrical fiber bundle by the fiber bundle outlet hole and enters the second infiltration cavity; in the second infiltration cavity, the cylindrical fiber bundle is rolled and unfolded by a press roller to form a fiber belt, secondary infiltration is carried out, the infiltrated fiber belt is extruded into the cylindrical fiber bundle again by the fiber bundle inlet hole on the baffle plate, and the cylindrical fiber bundle enters the third infiltration cavity; in the third infiltration cavity, the cylindrical fiber bundle is rolled and unfolded by the compression roller for the second time to form a fiber belt, the fiber belt is infiltrated for the third time, the fiber belt is extruded into a cylinder by a fiber bundle outlet on the shell of the plastic coating device, and the fiber belt comes out of the plastic coating device to complete the plastic coating process of the fiber bundle.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117400566A (en) * | 2023-12-15 | 2024-01-16 | 烟台核电石墨烯材料研究院有限公司 | Preparation system and method of graphene modified photosensitive curing integrated belt material |
-
2022
- 2022-08-12 CN CN202210967707.4A patent/CN115339017A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117400566A (en) * | 2023-12-15 | 2024-01-16 | 烟台核电石墨烯材料研究院有限公司 | Preparation system and method of graphene modified photosensitive curing integrated belt material |
| CN117400566B (en) * | 2023-12-15 | 2024-02-09 | 烟台核电石墨烯材料研究院有限公司 | Preparation system and method of graphene modified photosensitive curing integrated belt material |
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