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CN-122011442-A - Continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member, reinforced screw and preparation method thereof

CN122011442ACN 122011442 ACN122011442 ACN 122011442ACN-122011442-A

Abstract

The invention provides a continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member, a reinforced screw and a preparation method thereof, belongs to the technical field of engineering plastics, and mainly develops post-treatment of annealing a bar after hot press molding in a vacuum rotation state, so that the whole bar can be heated uniformly, internal stress is effectively eliminated, interface combination of continuous carbon fibers and a polyaryletherketone matrix is enhanced, and further, the anti-pull out force, the bending strength and the fatigue life are remarkably improved.

Inventors

  • WU YU
  • OuYang Zhaofei
  • LI CHUNMING
  • SHEN JIE
  • WANG WENPENG

Assignees

  • 上海珀利医用材料有限公司

Dates

Publication Date
20260512
Application Date
20260414

Claims (15)

  1. 1. The preparation method of the continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member is characterized by comprising the following steps of: (1) Carrying out in-situ impregnation on the continuous carbon fiber and the polyaryletherketone in a molten state to form a continuous carbon fiber/polyaryletherketone prepreg tape; (2) Laying the continuous carbon fiber/polyaryletherketone prepreg tape in the step (1) according to an axial direction of 0 degrees, and performing hot pressing to form a continuous carbon fiber reinforced polyaryletherketone plate; (3) And (3) machining the continuous carbon fiber reinforced polyaryletherketone plate in the step (2) along the axial direction by 0 DEG, and annealing the obtained bar in a vacuum rotation state to form the continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member.
  2. 2. The method according to claim 1, wherein in the step (1), the volume fraction of the continuous carbon fibers in the continuous carbon fiber/polyaryletherketone prepreg tape is 40-65%; in the step (1), the polyaryletherketone comprises any one or a combination of at least two of polyetheretherketone, polyetherketoneketone, polyetheretherketone ketone and polyetherketoneketone.
  3. 3. The method according to claim 1, wherein in the step (2), the hot pressing is performed at a temperature of 350 to 400 ℃, the hot pressing is performed at a pressure of 13 to 18MPa, and the hot pressing is performed for a time of 3 to 8 minutes.
  4. 4. The method according to claim 1, wherein in the step (3), the annealing is performed in a vacuum drum dryer, the vacuum degree of the annealing is 100Pa or less, and the rotational speed of the annealing is 5 to 25rpm.
  5. 5. The method according to claim 1 or 4, wherein in the step (3), the annealing includes a low-temperature destressing stage, a high-temperature crystal region rearrangement stage, and a slow cooling shaping stage which are sequentially performed.
  6. 6. The method according to claim 1 or 4, wherein in the step (3), the annealing is accompanied by a microwave vibration treatment having a microwave vibration frequency of 20 to 80Hz.
  7. 7. A continuous carbon fiber reinforced polyaryletherketone rod-like structure member, characterized in that it is prepared by the preparation method according to any one of claims 1 to 6.
  8. 8. A reinforcing screw, characterized in that the reinforcing screw comprises a central core bar, a thread layer positioned on the side surface of the central core bar, and a screw tail positioned at the tip end of the central core bar; Wherein the middle core rod comprises a continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member prepared by the preparation method of any one of claims 1 to 6, or the middle core rod comprises the continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member of claim 7.
  9. 9. A method of making the reinforcing screw of claim 8, comprising the steps of: S1, carrying out in-situ impregnation on continuous carbon fibers and polyaryletherketone in a molten state to form continuous carbon fiber/polyetheretherketone prepreg filaments and continuous carbon fiber/polyetheretherketone prepreg tapes; S2, paving the continuous carbon fiber/polyaryletherketone prepreg tape in the S1 according to an axial direction of 0 degrees, and performing hot pressing, and machining the obtained plate into a cylinder along the axial direction of 0 degrees to obtain a core rod material in the screw; S3, cutting the continuous carbon fiber/polyaryletherketone prepreg tape in the S1 into narrow tapes along the axial direction of 0 degrees, and carrying out staggered winding and hot pressing on the side surfaces of the core bars in the screw in the S2 by adopting the narrow tapes to form a thread area to be processed; S4, the continuous carbon fiber/polyether-ether-ketone prepreg filaments in the S1 are adopted to be woven in a staggered mode to form carbon fiber cloth, the carbon fiber cloth is coated at the tail part of the bar obtained in the S3, and the screw tail part is formed through hot pressing; s5, placing the screw blank prepared in the step S4 into a screw die, and performing hot pressing to obtain a formed screw; And S6, annealing the forming screw in the vacuum rotation state to form the reinforcing screw.
  10. 10. The method according to claim 9, wherein the narrow band has a width of 1.5-2.5mm and the staggered winding has a spiral angle of + -20 DEG- + -40 DEG in step S3.
  11. 11. The method according to claim 9, wherein the weaving angle of the carbon fiber cloth is ±40- ±50° in step S4.
  12. 12. The method according to claim 9, wherein in the steps S2 to S5, the temperature of the hot pressing is 350 to 400 ℃ respectively, the pressure of the hot pressing is 13 to 18MPa respectively, and the time of the hot pressing is 3 to 8min respectively.
  13. 13. The method according to claim 9, wherein in step S6, the annealing is performed in a vacuum drum dryer, the vacuum degree of the annealing is 100Pa or less, and the rotational speed of the annealing is 5 to 25rpm.
  14. 14. The preparation method of the heat treatment device according to claim 9, wherein in the step S6, the annealing comprises a low-temperature stress relief stage, a high-temperature crystal region rearrangement stage and a slow cooling shaping stage which are sequentially performed, wherein the temperature of the low-temperature stress relief stage is 180-220 ℃, the heat preservation time is 1-2h, the temperature of the high-temperature crystal region rearrangement stage is 280-340 ℃, the heat preservation time is 1-3h, and the cooling rate of the slow cooling shaping stage is less than or equal to 2 ℃ per minute.
  15. 15. The method according to claim 9, wherein in step S6, the annealing is accompanied by a microwave vibration treatment having a microwave vibration frequency of 20 to 80Hz.

Description

Continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member, reinforced screw and preparation method thereof Technical Field The invention belongs to the technical field of engineering plastics, and particularly relates to a continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member, a reinforced screw and a preparation method thereof. Background At present, the continuous carbon fiber reinforced thermoplastic composite material further integrates the outstanding characteristics of recycling, high-efficiency forming and the like on the basis of inheriting the excellent performances of corrosion resistance, high specific strength, low density and the like of the thermosetting carbon fiber composite material, so that the continuous carbon fiber reinforced thermoplastic composite material has wide application prospect in a plurality of front-edge fields, such as aerospace, medical health, electronic and electric industries and the like. However, the preparation and the forming of the material are limited by a core technical barrier, and the popularization and the application of the material are still subject to more restrictions in China. Among them, the medical field has become a relatively mature and concentrated application in China at present due to its specific performance requirements and technical acceptance. The traditional screw in clinical medicine is mostly made of titanium alloy or stainless steel materials, but the metal materials have the following defects that 1. The elastic modulus is far higher than that of human bone tissue, a stress shielding effect is easy to generate, so that bone absorption and screw loosening are caused, 2. Obvious artifacts are generated in medical images such as CT, MRI and the like, postoperative evaluation is influenced, and 3. The metal ion release risk exists in long-term implantation. The polyether-ether-ketone and the orthopedic material derived from the polyether-ether-ketone have good image permeability and elastic modulus close to human bone tissue, so that the polyether-ether-ketone is gradually developed and applied clinically. However, most of the existing carbon fiber composite material screws mainly use chopped carbon fiber reinforced PEEK, for example, patent CN116533550A discloses a processing technology of a cone forming screw based on carbon fiber reinforced PEEK material, and the carbon fiber reinforced PEEK material is prepared by using composite powder obtained by uniformly mixing chopped carbon fiber and PEEK powder and granulating, and then the semi-finished product of each component part of the cone forming screw is obtained by injection molding and hot press forming. In addition, some clinical medical screw mandrels still adopt metal, for example, patent CN113209389a discloses a medical orthopedic bone screw, the bone screw comprises a mandrel and carbon fiber reinforced polyether-ether-ketone wrapped outside the mandrel, and the mandrel is made of Ti6Al4V titanium alloy. Moreover, there are few reported screw forming back-end processing techniques. In view of the above, the existing carbon fiber reinforced thermoplastic composite material still has the problems of insufficient mechanical properties and the like, and a continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member, a reinforced screw and a preparation method thereof need to be developed. Disclosure of Invention In view of the problems existing in the prior art, the invention provides a continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member, a reinforced screw and a preparation method thereof, and particularly develops post-treatment for annealing a bar after hot press molding in a vacuum rotation state, so that the whole bar can be heated uniformly, internal stress is effectively eliminated, interface combination of continuous carbon fibers and a polyaryletherketone matrix is enhanced, and further, the anti-pulling force, the bending strength and the fatigue life are remarkably improved. To achieve the purpose, the invention adopts the following technical scheme: The invention aims at providing a preparation method of a continuous carbon fiber reinforced polyaryletherketone rod-shaped structural member, which comprises the following steps: (1) Carrying out in-situ impregnation on the continuous carbon fiber and the polyaryletherketone in a molten state to form a continuous carbon fiber/polyaryletherketone prepreg tape; (2) Laying the continuous carbon fiber/polyaryletherketone prepreg tape in the step (1) according to an axial direction of 0 degrees, and performing hot pressing to form a continuous carbon fiber reinforced polyaryletherketone plate; (3) And (3) machining the continuous carbon fiber reinforced polyaryletherketone plate in the step (2) along the axial direction by 0 DEG, and annealing the obtained bar in a vacuum rotation state to form the continuous carbon fiber rei