CN115742500A - Ultra-high molecular weight polyethylene ultra-thin unidirectional belt, protection plate and manufacturing method - Google Patents

Abstract

The embodiment of the present invention discloses a method for making ultra-thin unidirectional belts of ultra-high molecular weight polyethylene and a protective plate. stretching; the ultra-high molecular weight polyethylene fiber bundles stretched by the effect of frequency conversion air flow are further widened under the action of in-situ multi-stage finishing rollers, and ultra-thin fiber bundles of ultra-high molecular weight polyethylene are obtained; the use of inorganic nanomaterials for resin Modified to produce modified resin; the atomized modified resin is shot on the surface of ultra-thin ultra-high molecular weight polyethylene fiber bundles at a set angle and speed, and composited to obtain multi-phase hybrid unidirectional tapes of ultra-high molecular weight polyethylene fibers. The production method of the protective plate includes: laying ultra-high molecular weight polyethylene ultra-thin unidirectional tapes according to the set specifications and directions for multiple times to obtain multi-layer unidirectional tape layers; hot pressing the multi-layer unidirectional tape layers in the mold Molded to obtain ultra-high molecular weight polyethylene protective plate.

Description

Ultra-high molecular weight polyethylene ultra-thin unidirectional tape, protective plate and production method

technical field

The invention belongs to the technical field of composite materials, and in particular relates to an ultra-thin unidirectional tape of ultra-high molecular weight polyethylene, a protective plate and a production method.

Background technique

Ultra-high molecular weight polyethylene fiber is currently the fiber with the best specific tensile modulus and specific tensile strength among high-performance fibers.

Low axial and transverse compressive strength, good impact resistance, strong chemical corrosion resistance, low density, etc., are especially suitable for use as protective materials. UHMWPE fibers are widely used in protective products, such as bulletproof vests, bulletproof helmets, vehicle armor protection, military aircraft armor protection and other fields. The ultra-high molecular weight polyethylene unidirectional tape is the base material for preparing bulletproof fiber products, and the performance of the ultra-high molecular weight polyethylene unidirectional tape is directly related to the bulletproof performance of the bulletproof material. In order to improve the protective performance of bulletproof materials, the preparation of ultra-high molecular weight polyethylene unidirectional tapes with excellent performance has always been a technical difficulty and an important development direction in this field.

Contents of the invention

In view of this, on the one hand, some embodiments disclose a method for making an ultra-thin unidirectional tape of ultra-high molecular weight polyethylene, including:

The moving ultra-high molecular weight polyethylene fiber bundles are stretched multiple times under the action of frequency conversion airflow;

The ultra-high molecular weight polyethylene fiber bundles stretched by the action of frequency conversion air flow are further stretched under the action of in-situ multi-stage finishing rollers to obtain ultra-high molecular weight polyethylene ultra-thin fiber bundles;

Use inorganic nano-materials to modify resins to make modified resins;

The atomized modified resin is shot on the surface of ultra-thin fiber bundles of ultra-high molecular weight polyethylene at a set angle and speed, and pre-impregnated to obtain multi-phase hybrid unidirectional tapes of ultra-high molecular weight polyethylene fibers.

Further, some embodiments disclose the manufacturing method of the ultra-high molecular weight polyethylene ultra-thin unidirectional tape, the variable-frequency air flow is the air flow whose air pressure and air flow direction are adjusted and changed during the stretching process.

In the manufacturing method of ultra-high-molecular-weight polyethylene ultra-thin unidirectional tape disclosed in some embodiments, the multiple stretching is to carry out multiple stretching sequentially under different frequency-converting airflows.

In the manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional belt disclosed in some embodiments, the in-situ multi-stage finishing roller is set to be rotatable, and the state of the in-situ multi-stage finishing roller is set to be rotating or stationary during the stretching process; the original The rotating direction of the multi-stage finishing roller is set to be the same as or opposite to the moving direction of the ultra-high molecular weight polyethylene fiber bundle.

The manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape disclosed in some embodiments, inorganic nanomaterials include boron carbide, boron nitride, aluminum oxide, diamond; resin includes thermoplastic resin and thermosetting resin; the quality of inorganic nanomaterials and resin Ratio is set to 2~6%.

In the manufacturing method of the ultra-thin unidirectional tape of ultra-high molecular weight polyethylene disclosed in some embodiments, the modified resin is atomized under the action of high-pressure airflow.

In the manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape disclosed in some embodiments, the mass ratio of modified resin to ultra-high molecular weight polyethylene fiber in the multi-phase hybrid unidirectional tape of ultra-high molecular weight polyethylene fiber is set to 15～ 30%.

On the other hand, some embodiments disclose an ultra-thin unidirectional tape of ultra-high molecular weight polyethylene, which is produced by a method for making an ultra-thin unidirectional tape of ultra-high molecular weight polyethylene. The thickness of the ultra-thin unidirectional tape of ultra-high molecular weight polyethylene is between Below 0.04mm.

On the other hand, some embodiments disclose ultra-high molecular weight polyethylene protective plates, which are made from ultra-thin unidirectional tapes of ultra-high molecular weight polyethylene. The manufacturing method includes:

S1. Lay ultra-high molecular weight polyethylene ultra-thin unidirectional tapes according to the set specifications to obtain the first layer of unidirectional tapes;

S2. Lay layers on the first layer of unidirectional tape with a set layup angle and specification to obtain a second layer of unidirectional tape;

S3, repeating the laying process of S2 multiple times to obtain a multi-layer unidirectional tape layer with a set thickness;

S4. The multi-layer unidirectional tape layers are arranged in a mold, and formed under heat and pressure conditions to obtain an ultra-high molecular weight polyethylene protective plate.

Further, for the ultra-high molecular weight polyethylene protective board disclosed in some embodiments, the angle between the ply angles of adjacent unidirectional tape layers is between 0° and 45°.

The manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape disclosed in the embodiment of the present invention utilizes the multi-stage combination of variable-frequency air flow to vibrate the widened fiber bundles and mechanically widened fiber bundles to stretch the ultra-high molecular weight polyethylene fibers into ultra-thin Ultra-thin fiber bundles of high molecular weight polyethylene, and then pre-impregnated with modified resin, obtained a multi-phase hybrid unidirectional belt of ultra-high molecular weight polyethylene fibers with a thickness of less than 0.04mm; Ultra-high molecular weight polyethylene protective plate, compared with the protective plate made of ordinary ultra-high molecular weight polyethylene fiber, the protective plate disclosed in the embodiment of the present invention has more layers of ultra-high molecular weight polyethylene fiber heterogeneous mixed unidirectional tape, The number of layers increases, the energy absorption effect is greatly optimized, and the bulletproof performance is improved, so it has a good application prospect in the field of bulletproof materials.

Description of drawings

Fig. 1 embodiment 1 ultra-high molecular weight polyethylene ultra-thin unidirectional tape manufacturing method schematic flow chart

Figure 2 is a schematic diagram of in-situ multi-stage finishing rolls in Example 2;

Fig. 3 is a schematic diagram of the manufacturing process of the UHMWPE protective plate in Example 3.

reference sign

1 Release component 2 Pneumatic frequency conversion vibration device

3 In-situ multi-stage finishing rolls 4 Guide rolls

5 atomizing device 31 corrugated surface

11 The first layer of unidirectional tape layer 12 The second layer of unidirectional tape layer

13 The third layer of unidirectional tape layer 100 ultra-high molecular weight polyethylene fiber bundles

Detailed ways

The word "embodiment" is used here exclusively, and any embodiment described as "exemplary" is not necessarily to be construed as superior or better than other embodiments. In the performance index tests in the embodiments of the present invention, unless otherwise specified, conventional test methods in the art are used. It should be understood that the terms described in the embodiments of the present invention are only used to describe specific implementation manners, and are not used to limit the content disclosed in the embodiments of the present invention.

Unless otherwise specified, the technical and scientific terms used herein have the same meanings commonly understood by those of ordinary skill in the technical field to which the embodiments of the present invention belong; as other unspecified test methods and technical means in the embodiments of the present invention all refer to Experimental methods and technical means commonly used by those skilled in the art.

The terms "substantially" and "approximately" are used herein to describe small fluctuations. For example, they may refer to less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ± 0.1%, if less than or equal to ±0.05%. Numerical data expressed or presented herein in a range format are used for convenience and brevity only, and should therefore be construed flexibly to include not only the values expressly recited as the boundaries of that range, but also all individual values or values contained within that range. subrange. For example, a numerical range of "1 to 5%" should be interpreted to include not only the explicitly recited value of 1% to 5%, but also include individual values and subranges within the indicated range. Accordingly, individual values such as 2%, 3.5% and 4%, and subranges such as 1% to 3%, 2% to 4% and 3% to 5% etc. are included in this numerical range. The same principle applies to ranges reciting only one numerical value. Moreover, such an interpretation applies regardless of the breadth of the range or the characteristics described.

Herein, including in the claims, conjunctions such as "comprises," "comprises," "with," "has," "containing," "relates to," "contains," etc., are to be construed as open-ended , which means "including but not limited to". Only the conjunctions "consisting of" and "consisting of" are closed conjunctions.

In order to better illustrate the contents of the present invention, numerous specific details are given in the following specific examples. It will be understood by those skilled in the art that the present invention may be practiced without certain of the specific details. In the embodiments, some methods, means, instruments, equipment, etc. that are well known to those skilled in the art are not described in detail, so as to highlight the gist of the present invention.

On the premise of no conflict, the technical features disclosed in the embodiments of the present invention can be combined arbitrarily, and the obtained technical solutions belong to the content disclosed in the embodiments of the present invention.

In some embodiments, the manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape comprises:

The moving ultra-high molecular weight polyethylene fiber bundles are stretched multiple times under the action of variable frequency airflow; usually, during the release process, the ultra-high molecular weight polyethylene fiber bundles keep moving continuously along their axial direction, and the fibers are subjected to Moving on the traction roller and guide roller under the action of tension is beneficial to spread the fibers in the fiber bundle and separate them from each other; the moving ultra-high molecular weight polyethylene fiber bundle can be spread under the action of airflow, for example, in The fibers in the fiber bundle are blown away by the airflow and separated from each other. However, due to the constant state of the airflow, the fiber bundle quickly reaches a stable state and does not continue to disperse. The effect is limited. For example, the frequency conversion airflow is used for purging. In the process of blowing the fiber bundle with the airflow, the size of the airflow can be changed. It can generate additional vibration during the process of purging and dispersing the fibers, and the vibrating fibers can be further dispersed due to mutual collision, which effectively improves the dispersion effect between the fibers in the fiber bundle, and the spreading effect is more ; Further, in the process of airflow dispersing fiber bundles, changing the blowing direction of airflow can also strengthen the interaction between fiber filaments in fiber bundles, and promote their mutual dispersion and widening; Changing the direction of the airflow, or periodically changing the direction of the airflow with a set rule, can effectively control the stretching process and control the final stretching effect; in view of the limited time of the variable frequency airflow on the stretching of the fiber bundle, it can Multiple frequency conversion airflow stretches the fiber bundle to enhance the stretching effect; in order to reasonably control the stretching effect of the frequency conversion airflow on the fiber bundle, the process of multiple frequency conversion airflow stretching can be independently controlled and carried out independently, under different process conditions Performing multiple stretches is beneficial to control the stretching effect on the fiber bundle.

The ultra-high molecular weight polyethylene fiber bundles stretched by the action of frequency conversion air flow are further stretched under the action of in-situ multi-stage finishing rollers to obtain ultra-thin fiber bundles of ultra-high molecular weight polyethylene; usually the fiber bundles can be adjusted by mechanical rollers For widening, use the force between the mechanical roller and the fiber bundle to disperse and spread the fibers in the fiber bundle, which can reduce the thickness of the fiber bundle; for UHMWPE fiber bundles stretched by frequency conversion airflow , the use of in-situ multi-stage finishing rollers for further widening can coordinate with the widening effect of the frequency conversion airflow, which is more conducive to the further widening of the ultra-high molecular weight polyethylene fiber bundles, in which the fiber arrangement is more Uniform, which is conducive to improving the performance of ultra-high molecular weight polyethylene ultra-thin unidirectional tape; after the ultra-high molecular weight polyethylene fiber bundles are stretched by frequency-conversion airflow vibration and wave-type spreading rollers for many times, the ultra-high molecular weight polyethylene ultra-thin Thin fiber bundles, the fibers are evenly dispersed in the width direction of the fiber bundles, which makes the tension of the fiber bundles more uniform, greatly reduces the phase alignment deflection angle, can effectively inhibit the interlayer cracking and crack propagation in the fiber composite material, and greatly improve the fiber strength. The mechanical properties of composite materials, such as greatly improving the mechanical properties of ultra-high molecular weight polyethylene ultra-thin unidirectional tapes and protective plates;

Use inorganic nanomaterials to modify resins to make modified resins; usually, inorganic nanomaterials can be mixed with resins to obtain resin liquids containing inorganic nanoparticles; resin liquids participate in the subsequent prepreg process in liquid form, and liquid resins The liquid is convenient for atomization; for example, take the inorganic nano material according to the set mass and put it into the liquid resin to mix, and then stir with a stirrer, the stirring speed is set to 500r/min, stir for 60Min, and then defoam for 20min, you can get the inorganic nano The mass content of the particles is 5% of the modified resin solution. Inorganic nanoparticles can also improve the impact absorption energy of the matrix of the unidirectional tape, and increase the energy absorption level of the unidirectional tape.

The atomized modified resin is shot on the surface of ultra-high molecular weight polyethylene ultra-thin fiber bundles at a set angle and speed, and composited to obtain multi-phase hybrid unidirectional tapes of ultra-high molecular weight polyethylene fibers. Usually, the modified resin liquid is atomized under the action of high-pressure airflow, and the modified resin in the atomized state forms a steam flow with a certain speed, and the inorganic nanoparticles in it interact with the air to form plasma, and the plasma and the extended The interaction between ultra-high molecular weight polyethylene fibers can reduce the binding energy between the fiber surface and the resin liquid, and promote the dispersion and film formation of the resin liquid on the fiber surface. The impregnation effect of the resin liquid on the fiber surface is excellent, and the atomized resin can The liquid is evenly and efficiently distributed on the surface of the fiber to form a resin liquid film, but it will not change the arrangement state of the fibers in the ultra-thin fiber bundle, and can completely maintain the strength performance of the ultra-thin fiber bundle; at the same time, the edge area of the fiber surface in the fiber bundle It usually contains highly active ingredients, which are easy to react with oxygen in the air to form oxygen-containing active functional groups, which can react with other functional groups in the form of chemical bonds to form a strong interface, and further in the atomized resin liquid, it can react with active groups in the resin The resin will undergo a curing and cross-linking reaction to form a resin film with good leveling performance and uniform distribution. After the prepreg is completed, the surface of the fiber is covered with a uniformly distributed resin film. After further drying, ultra-thin ultra-high molecular weight polyethylene can be obtained. Unidirectional tape, ultra-thin unidirectional tape includes fiber bundles and resin matrix distributed around the fiber filaments, as well as inorganic nanoparticles in the resin film, so ultra-high molecular weight polyethylene ultra-thin unidirectional tape is a multiphase hybrid One-way tape.

In some embodiments, the variable-frequency airflow is an airflow in which airflow pressure and airflow direction are adjusted and changed during the stretching process. Usually, the variable-frequency air flow is realized by a pneumatic variable-frequency vibrating device, which usually includes a fan and a gas guide assembly. The fan can provide air flow with different pressure and flow rate, and the air flow direction and the airflow and fiber bundle can be guided by the gas guide component. The effective area, and then realize the adjustment and control of airflow pressure and airflow direction.

In some embodiments, multiple times of stretching are respectively performed multiple times of stretching sequentially under different frequency conversion airflows. Usually, frequency conversion stretching is realized under the action of frequency conversion air flow. Multiple pneumatic frequency conversion vibration devices are set in the fiber bundle stretching process, which can perform multiple stretches; multiple pneumatic frequency conversion vibration devices are usually distributed in sequence in the ultra-high molecular weight On the moving route of the polyethylene fiber bundle, the installation position of the pneumatic frequency conversion vibration device, the distance between the devices and the process parameters of the device can be set according to the widening of the fiber bundle.

In some embodiments, the in-situ multi-stage finishing roll is set to be rotatable, and the state of the in-situ multi-stage finishing roll is set to be rotating or stationary during the spreading process; the rotation direction of the in-situ multi-stage finishing roll is set to be the same as The direction of movement of molecular weight polyethylene fiber bundles is the same or opposite. The in-situ multi-stage finishing roll utilizes the interaction between the wavy curved surface and the fiber bundle to realize the widening of the fiber bundle. The surface of the in-situ multi-stage finishing roll is wavy, with continuously arranged convex arc surfaces, and the adjacent convex arc surfaces are concave surfaces, and the convex arc surfaces can be combined with fiber bundles Contact, while the concave surface cannot contact with the fiber bundle, during the rotation of the in-situ multi-stage finishing roll, the convexity and depression of the outer contour change regularly, so that the convex roll surface of the in-situ multi-stage finishing roll and the fiber bundle The contact state changes at a certain frequency. Under the constant traction force, the fibers are in a tension-relaxation cyclic state on the in-situ multi-stage finishing rollers, so that the fiber bundles are spread and the fibers are arranged more evenly. The radian of the raised curved surface, the distance between the raised curved surfaces, etc. are designed according to the need for width.

Usually, during the interaction between the in-situ multi-stage finishing roller and the fiber bundle, the movement state of the in-situ multi-stage finishing roller can be adjusted to adjust its widening effect on the fiber bundle; for example, the in-situ multi-stage finishing roller If the whole roll and the fiber bundle move in the same direction, the force between the two is relatively small, and the dispersion or convergence effect is relatively weak. There is a difference in speed, which can also affect the action of the fiber bundle, that is, the effect on the fiber bundle can also be adjusted by adjusting the relative movement speed; the in-situ multi-stage finishing roller and the fiber bundle move in reverse, the force between the two Relatively large, the spreading roller has a greater damping effect on the fiber bundle, and has a relatively greater impact on the effect of fiber dispersion or convergence; similarly, in the state of reverse motion, the speed difference between the two also has a greater impact on the fiber bundle effect has an impact.

In some embodiments, the inorganic nanomaterials include boron carbide, boron nitride, aluminum oxide, and diamond; the resin includes thermoplastic resins and thermosetting resins; the mass ratio of the inorganic nanomaterials to the resin is set at 2-6%.

In some embodiments, the modified resin is atomized under the action of high-pressure airflow. Usually, the atomization process of the modified resin is carried out in an atomization device. In some embodiments, the atomizing device includes a feeding assembly, a spray gun, and a high-pressure gas source. The feeding assembly is connected to the spray gun, and the spray gun is connected to the high-pressure air source; the modified resin in the feeding assembly is delivered to the spray gun, and is sprayed and atomized at high speed under the action of the high-pressure airflow entering the spray gun to form a certain coverage area, the atomization area is adapted to the widened UHMWPE ultra-thin fiber bundle, then the atomized modified resin liquid can be sprayed onto the UHMWPE ultra-thin fiber bundle surface, for pre-soaking.

In some embodiments, the mass ratio of the modified resin to the ultra-high molecular weight polyethylene fiber in the ultra-high molecular weight polyethylene fiber heterogeneous hybrid unidirectional tape is set at 15-30%.

The ultra-high molecular weight polyethylene ultra-thin unidirectional tape disclosed in some embodiments is produced by the method for making the ultra-high molecular weight polyethylene ultra-thin unidirectional tape, and the thickness of the ultra-high molecular weight polyethylene ultra-thin unidirectional tape is less than 0.04mm.

The ultra-high molecular weight polyethylene protective plate disclosed in some embodiments is made from ultra-thin unidirectional tape of ultra-high molecular weight polyethylene, and the manufacturing method includes:

S1. Lay ultra-high molecular weight polyethylene ultra-thin unidirectional tapes according to the set specifications to obtain the first layer of unidirectional tapes;

S2. Lay layers on the first layer of unidirectional tape with a set layup angle and specification to obtain a second layer of unidirectional tape;

S3, repeating the laying process of S2 multiple times to obtain a multi-layer unidirectional tape layer with a set thickness;

S4. The multi-layer unidirectional tape layers are arranged in a mold, and formed under heat and pressure conditions to obtain an ultra-high molecular weight polyethylene protective plate.

In some embodiments, the included angle between the ply angles of adjacent unidirectional tape layers in the protective plate is between 0° and 45°.

In some embodiments, the protective plate is obtained by compounding multi-layer ultra-high molecular weight polyethylene ultra-thin unidirectional tapes. Specifically, ultra-high molecular weight polyethylene ultra-thin unidirectional tapes are laid layer by layer to form a multi-layer superimposed unidirectional tape. Tape layer, the laying direction of the unidirectional tape in each layer is the same, and the laying angle between adjacent unidirectional tape layers is 45° different. -25MPa, the holding pressure is 25MPa, the holding temperature is set at 128-130°C, and the holding time is set at 30min. After the hot-pressing lamination is completed, the temperature is slowly lowered, and the mold is demoulded to obtain an ultra-high molecular weight polyethylene protective plate.

The technical details are further exemplified below in conjunction with the embodiments.

Example 1

Fig. 1 is a schematic flow chart of the method for manufacturing the ultra-thin unidirectional tape of ultra-high molecular weight polyethylene disclosed in Example 1.

In embodiment 1, the manufacture process of ultra-high molecular weight polyethylene ultra-thin unidirectional tape comprises:

The ultra-high molecular weight polyethylene fiber bundle 100 is released through the release assembly 1, and continues to move under the guidance of the subsequent guide rollers 4 and the traction of the traction roller; above the moving fiber bundle, three independent pneumatic frequency converters are arranged in sequence. The vibration device 2 controls the pneumatic frequency conversion vibration device 2 to blow the frequency conversion vibration airflow to the ultra-high molecular weight polyethylene fiber bundle 100, and performs three times of widening under the action of the frequency conversion airflow;

The ultra-high molecular weight polyethylene fiber bundles 100 stretched by the action of the frequency conversion airflow are further stretched under the action of the in-situ multi-stage finishing roller 3 to obtain ultra-high molecular weight polyethylene ultra-thin fiber bundles;

A spray gun equipped with an atomizing device 5 is fitted above the stretched ultra-high molecular weight polyethylene ultra-thin fiber bundle, and the operating conditions of the atomizing device 5 are set to control the spray gun to spray modified resin liquid;

The modified resin liquid sprayed at the set angle and speed forms an atomized area on the surface of the ultra-high molecular weight polyethylene ultra-thin fiber bundle, and the ultra-high molecular weight polyethylene ultra-thin fiber bundle and the modified resin are pre-impregnated continuously through the atomized area. Obtain ultra-high molecular weight polyethylene fiber heterogeneous hybrid unidirectional tape.

Example 2

Fig. 2 is a schematic diagram of the in-situ multi-stage finishing roll disclosed in Example 2, wherein the lower diagram in Fig. 2 is a schematic cross-sectional diagram of the AA' plane of the upper diagram.

As shown in Figure 2, the surface of the in-situ multi-stage finishing roll 3 is wave-shaped, and the wave-shaped surface 31 includes an upwardly protruding arc-shaped surface and a downwardly concave arc-shaped surface, along the surface of the in-situ multi-stage finishing roll The circumferential direction is continuously arranged at intervals, and the two are continuously transitioned. During the moving process under the action of continuous constant tension, the raised arc surface is in contact with the fiber bundle. The fiber bundles on the surface 31 undergo regular stretching-relaxation to realize ultra-thin stretching of the fiber bundles, and the distribution of fibers in the width direction of the fiber bundles is more uniform.

It can be seen from the lower figure in Fig. 2 that the raised arc-shaped surface 31 of the in-situ multi-stage finishing roll refers to the continuous transition of the raised edge surface in the circumferential direction of the roll surface, presenting an arc shape, which is beneficial to the roll surface and fiber bundles. The force between them is evenly distributed, which improves the uniformity of fiber spreading and prevents damage to the fiber.

As an optional embodiment, the interior of the in-situ multi-stage finishing roller is a hollow structure, including an outer shell forming a hollow structure, the outer shell is wavy, and forms a cylindrical shape with a wavy surface as a whole, and the two ends of the cylindrical shell Consolidated with a rotating shaft on its central axis.

Example 3

Fig. 3 is a schematic diagram of the manufacturing process of the UHMWPE protective plate disclosed in Example 3.

S1. Lay the ultra-high molecular weight polyethylene ultra-thin unidirectional tape in a direction consistent with the horizontal direction in Figure 3, and lay it into a square to obtain the first square unidirectional tape layer 11;

S2, on the first layer of square unidirectional belt layer, carry out layering with the direction that is α angle with the horizontal direction among Fig. 3, layering is square, obtains the second layer of unidirectional belt layer 12; Wherein the scope of α is 0～45°;

S3, on the second layer of unidirectional belt layer of the square, carry out layering with the direction that is β angle with the horizontal direction among Fig. 3, lay into a square, obtain the unidirectional belt layer 13 of the third layer; Then on the third layer of the square On the layer unidirectional belt layer, lay layers with the direction that is γ angle with the horizontal direction among Fig. 3, obtain the 4th layer unidirectional belt layer 14; Finally obtain four layers of unidirectional belt layer with set thickness; Wherein, β The range of -α is 0~45°, and the range of γ-β is 0~45°;

S4. The four-layer unidirectional belt layer is set in a mold and formed under heat and pressure conditions. After forming, it is cut according to the set specifications to obtain an ultra-high molecular weight polyethylene protective plate.

The manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape disclosed in the embodiment of the present invention utilizes the multi-stage combination of variable-frequency air flow to vibrate the widened fiber bundles and mechanically widened fiber bundles to stretch the ultra-high molecular weight polyethylene fibers into ultra-thin Ultra-thin fiber bundles of high molecular weight polyethylene, and then pre-impregnated with modified resin, obtained a multi-phase hybrid unidirectional belt of ultra-high molecular weight polyethylene fibers with a thickness of less than 0.04mm; Ultra-high molecular weight polyethylene protective plate, compared with the protective plate made of ordinary ultra-high molecular weight polyethylene fiber, the protective plate disclosed in the embodiment of the present invention has more layers of ultra-high molecular weight polyethylene fiber heterogeneous mixed unidirectional tape, The number of layers increases, the energy absorption effect is greatly optimized, and the bulletproof performance is improved, so it has a good application prospect in the field of bulletproof materials.

The technical solutions disclosed in the embodiments of the present invention and the technical details disclosed in the embodiments are only illustrative of the inventive concept of the present invention, and do not constitute a limitation to the technical solutions of the embodiments of the present invention. All conventional changes, substitutions or combinations, etc., have the same inventive concept as the present invention, and are within the protection scope of the claims of the present invention.

Claims (10)

1. The method for making ultra-thin unidirectional tape of ultra-high molecular weight polyethylene, characterized in that it comprises: The moving ultra-high molecular weight polyethylene fiber bundles are stretched multiple times under the action of frequency conversion airflow; The ultra-high molecular weight polyethylene fiber bundles stretched by the action of frequency conversion air flow are further stretched under the action of in-situ multi-stage finishing rollers to obtain ultra-high molecular weight polyethylene ultra-thin fiber bundles; Use inorganic nano-materials to modify resins to make modified resins; The atomized modified resin is shot at the ultra-high molecular weight polyethylene ultra-high molecular weight polyethylene at a set angle and speed, and the ultra-high molecular weight polyethylene fiber multi-phase hybrid unidirectional tape is obtained by pre-impregnation. 2. The manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape according to claim 1, characterized in that, the variable-frequency airflow is an airflow in which airflow pressure and airflow direction are adjusted and changed during the stretching process. 3. The manufacturing method of the ultra-high molecular weight polyethylene ultra-thin unidirectional tape according to claim 1, characterized in that, the multiple stretches are carried out successively multiple stretches under different frequency-conversion airflows. 4. The manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape according to claim 1, characterized in that, said in-situ multi-stage finishing rollers are set to be rotatable, and said in-situ multi-stage finishing rolls are rotatable during the widening process. The state of the stage finishing roller is set to be rotating or stationary; the rotation direction of the in-situ multistage finishing roller is set to be the same as or opposite to the moving direction of the ultra-high molecular weight polyethylene fiber bundle. 5. The manufacture method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape according to claim 1, wherein said inorganic nanomaterials include boron carbide, boron nitride, aluminum oxide, diamond; said resin includes thermoplastic Resin and thermosetting resin; the mass ratio of the inorganic nanometer material to the resin is set at 2-6%. 6. The manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape according to claim 1, characterized in that the modified resin is atomized under the action of high-pressure airflow. 7. the manufacture method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape according to claim 1, is characterized in that, modified resin and ultra-high molecular weight polyethylene fiber in the ultra-high molecular weight polyethylene fiber heterogeneous unidirectional tape The mass ratio is set at 15-30%. 8. Ultra-high molecular weight polyethylene ultra-thin unidirectional tape, obtained by the manufacturing method of ultra-high molecular weight polyethylene ultra-thin unidirectional tape according to any one of claims 1 to 7, said ultra-high molecular weight polyethylene ultra-thin unidirectional tape The thickness of the tape is below 0.04mm. 9. The ultra-high molecular weight polyethylene protective plate is characterized in that it is made from the ultra-thin unidirectional tape of ultra-high molecular weight polyethylene according to claim 8, and the manufacturing method comprises: S1. Lay ultra-high molecular weight polyethylene ultra-thin unidirectional tapes according to the set specifications to obtain the first layer of unidirectional tapes; S2. Lay layers on the first layer of unidirectional tape with a set layup angle and specification to obtain a second layer of unidirectional tape; S3, repeating the laying process of S2 multiple times to obtain a multi-layer unidirectional tape layer with a set thickness; S4. The multi-layer unidirectional tape layers are arranged in a mold, and formed under heat and pressure conditions to obtain an ultra-high molecular weight polyethylene protective plate. 10. The ultra-high molecular weight polyethylene protective plate according to claim 9, characterized in that the angle between the laying angles of adjacent unidirectional tape layers is between 0° and 45°.

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