CN113527834A - High-temperature-resistant PEEK self-locking plastic binding belt and preparation method thereof - Google Patents
High-temperature-resistant PEEK self-locking plastic binding belt and preparation method thereof Download PDFInfo
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- CN113527834A CN113527834A CN202110880615.8A CN202110880615A CN113527834A CN 113527834 A CN113527834 A CN 113527834A CN 202110880615 A CN202110880615 A CN 202110880615A CN 113527834 A CN113527834 A CN 113527834A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/16—Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D63/00—Flexible elongated elements, e.g. straps, for bundling or supporting articles
- B65D63/10—Non-metallic straps, tapes, or bands; Filamentary elements, e.g. strings, threads or wires; Joints between ends thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a high-temperature-resistant PEEK self-locking plastic binding belt and a preparation method thereof, and belongs to the technical field of tightening parts. The ribbon is mainly made of polyether ether ketone (PEEK), and has good long-term high temperature resistance due to the fact that ether ketone bonds are contained, the ribbon is not prone to breaking under the high-temperature condition, and the molecular structure is not prone to being damaged; meanwhile, the polyether-ether-ketone material has excellent mould resistance and high and low temperature cycle resistance. According to the invention, the metal embedded sheet is arranged at the head part and is matched with the convex lattice structure of the body, so that the anti-slip and anti-backing effects are achieved, and the ring tension of the binding belt is greatly improved. Meanwhile, the design of the metal embedded sheet and the lattice structure of the body also enables the ribbon to have high-frequency vibration resistance.
Description
Technical Field
The invention relates to the technical field of tightening pieces, in particular to a high-temperature-resistant PEEK self-locking plastic binding belt and a preparation method thereof.
Background
With the rapid development of modern industry, the operation condition of mechanical transmission equipment is becoming more and more severe. Especially under high temperature conditions inside the engine, failure of plastic parts frequently occurs. In addition, the internal circuit of the engine is precise, the control cable is staggered and complicated, and the binding bands are generally used for classification and tightening. However, when the plastic cable tie is in a high-temperature environment for a long time, the mechanical property of the plastic cable tie is sharply reduced due to aging, and the locking is failed. Therefore, how to improve the harsh environment resistance of the plastic cable tie is one of the difficulties in the design of mechanical transmission equipment systems.
Disclosure of Invention
The invention aims to provide a high-temperature-resistant PEEK self-locking plastic binding belt and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a high-temperature-resistant PEEK self-locking plastic binding belt, which comprises a head part, a body and a tail part, wherein the head part is provided with a through hole; the head part is of a Chinese character hui-shaped structure, and a metal embedded sheet is arranged in the Chinese character hui-shaped structure; the inner side of the body is uniformly distributed with convex lattice structures; the head, the body and the tail are made of a material containing polyether ether ketone; the material containing the polyether-ether-ketone comprises polyether-ether-ketone and polytetrafluoroethylene; the material containing the polyether-ether-ketone comprises 80-100% of the polyether-ether-ketone and 0-20% of polytetrafluoroethylene.
Preferably, the included angle between the metal insert and the body is 45 degrees.
Preferably, the length, the width and the thickness of the metal embedded sheet are respectively 3.0-3.8 mm, 1.5-2.0 mm and 0.2-0.35 mm.
Preferably, the metal insert is made of stainless steel.
Preferably, the tail part is thin in the middle and thick on two sides.
The invention provides a preparation method of the high-temperature-resistant PEEK self-locking plastic cable tie, which comprises the following steps: fixing a metal embedded sheet at a corresponding position in a ribbon mold, then injecting a material containing polyether ether ketone into the mold by adopting an injection molding process, and sequentially maintaining pressure and cooling to obtain a high-temperature-resistant PEEK self-locking plastic ribbon;
the melt index of the polyether-ether-ketone at 380 ℃ is 50-100 g/10 min.
Preferably, the temperature of the ribbon die is 160-200 ℃, and the mold locking force of the ribbon die is 1000-1500N.
Preferably, the conditions of the injection molding process include: the injection temperature is 375-385 ℃, the nozzle temperature of the injection molding machine is 380-390 ℃, and the injection pressure is 150-170 bar.
Preferably, the pressure maintaining time is 8-10 s.
Preferably, the cooling time is 35-50 s.
The invention provides a high-temperature-resistant PEEK self-locking plastic binding belt, which comprises a head part, a body and a tail part, wherein the head part is provided with a through hole; the head part is of a Chinese character hui-shaped structure, and a metal embedded sheet is arranged in the Chinese character hui-shaped structure; the head part is of a Chinese character hui-shaped structure, and a metal embedded sheet is arranged in the Chinese character hui-shaped structure; the inner side of the body is uniformly distributed with convex lattice structures; the head, the body and the tail are made of a material containing polyether ether ketone; the material containing the polyether-ether-ketone comprises polyether-ether-ketone and polytetrafluoroethylene; the material containing the polyether-ether-ketone comprises 80-100% of the polyether-ether-ketone and 0-20% of polytetrafluoroethylene.
The ribbon is mainly made of polyether ether ketone (PEEK), and has good long-term high temperature resistance due to the fact that ether ketone bonds are contained, the ribbon is not prone to breaking under the high-temperature condition, and the molecular structure is not prone to being damaged; meanwhile, the polyether-ether-ketone material has excellent mould resistance and high and low temperature cycle resistance. According to the invention, the metal embedded sheet is arranged at the head part and is matched with the convex lattice structure of the body, so that the anti-slip and anti-backing effects are achieved, and the ring tension of the binding belt is greatly improved. Meanwhile, the design of the metal embedded sheet and the lattice structure of the body also enables the ribbon to have high-frequency vibration resistance.
Drawings
FIG. 1 is a schematic structural view of a PEEK self-locking plastic cable tie of the present invention, wherein the upper part is a front view and the lower part is a side view;
FIG. 2 is a ring tension diagram of the cable ties prepared in examples 1-3.
Detailed Description
The invention provides a high-temperature-resistant PEEK self-locking plastic binding belt, which comprises a head part, a body and a tail part, wherein the head part is provided with a through hole; the head part is of a Chinese character hui-shaped structure, and a metal embedded sheet is arranged in the Chinese character hui-shaped structure; the inner side of the body is uniformly distributed with convex lattice structures; the head, the body and the tail are made of a material containing polyether ether ketone; the material containing the polyether-ether-ketone comprises polyether-ether-ketone and polytetrafluoroethylene; the material containing the polyether-ether-ketone comprises 80-100% of the polyether-ether-ketone and 0-20% of polytetrafluoroethylene.
As shown in figure 1, the high-temperature-resistant PEEK self-locking plastic cable tie provided by the invention comprises a head part, a body part and a tail part.
In the invention, the head part is of a Chinese character hui-shaped structure, and a metal embedded sheet is arranged in the Chinese character hui-shaped structure. In the present invention, the metal insert is preferably made of stainless steel. The stainless steel material adopted by the invention can effectively avoid metal rusting caused by a humid environment.
In the invention, the length, width and thickness of the metal insert sheet are respectively preferably 3.0-3.8 mm, 1.5-2.0 mm and 0.2-0.35 mm, the length of the metal insert sheet is more preferably 3.2-3.6 mm, and is further preferably 3.4-3.5 mm; the width of the metal insert sheet is more preferably 1.6-1.9 mm, and further preferably 1.7-1.8 mm; the thickness of the metal insert sheet is more preferably 0.25 to 0.30mm, and still more preferably 0.27 to 0.28 mm.
In the invention, the included angle between the metal insert sheet and the body is preferably 45 degrees. The invention is convenient to install and has obvious retaining effect by controlling the included angle between the metal embedded sheet and the body to be 45 degrees.
The high-temperature-resistant PEEK self-locking plastic binding belt provided by the invention comprises a body; the inner side of the body is uniformly distributed with convex lattice structures. The convex lattice structure is not specially limited, and the convex lattice structure can be matched with a metal insert piece to play a role in preventing slipping and stopping.
The conventional ribbon is made of plastic materials, and the plastic retaining piece is replaced by the embedded piece made of metal materials on the basis of the conventional ribbon and is matched with the protruding lattice structure of the body, so that the ring tension of the ribbon can be greatly improved. Meanwhile, the design of the metal embedded sheet and the lattice structure of the body also enables the ribbon to have high-frequency vibration resistance.
The invention has no special requirement on the size of the body, and the size of the body is well known in the field.
The high-temperature-resistant PEEK self-locking plastic cable tie provided by the invention comprises a tail part. In the present invention, the tail is preferably thin in the middle and thick on both sides; the middle and the two sides form a ladder shape. The invention adopts the structure with thin middle and thick two sides, and is more convenient and accurate to use.
In the present invention, the head, body and tail are made of a polyetheretherketone-containing material. The material containing the polyether-ether-ketone comprises polyether-ether-ketone and polytetrafluoroethylene; the material containing the polyether-ether-ketone comprises 80-100% of the polyether-ether-ketone and 0-20% of polytetrafluoroethylene. More preferably, the material containing the polyetheretherketone comprises 90-100% by mass of the polyetheretherketone and 0-10% by mass of the polytetrafluoroethylene; most preferably, the mass content of the polyetheretherketone in the polyetheretherketone-containing material is 100%.
The ribbon is mainly made of polyether ether ketone (PEEK), and has good long-term high temperature resistance due to the fact that ether ketone bonds are contained, the ribbon is not prone to breaking under the high-temperature condition, and the molecular structure is not prone to being damaged; meanwhile, the polyether-ether-ketone material has excellent mould resistance and high and low temperature cycle resistance.
The invention provides a preparation method of the high-temperature-resistant PEEK self-locking plastic cable tie, which comprises the following steps: fixing a metal embedded sheet at a corresponding position in a ribbon mold, then injecting a material containing polyether ether ketone into the mold by adopting an injection molding process, and sequentially maintaining pressure and cooling to obtain a high-temperature-resistant PEEK self-locking plastic ribbon; the melt index of the polyether-ether-ketone at 380 ℃ is 50-100 g/10 min.
In the present invention, the starting materials used are all commercially available products well known in the art, unless otherwise specified.
Before injection molding, the material containing the polyether-ether-ketone is preferably dried in the invention.
In the invention, the drying temperature is preferably 80-200 ℃, and the drying time is preferably 3-8 hours.
In the present invention, when the material containing polyetheretherketone comprises polyetheretherketone and polytetrafluoroethylene, the drying preferably further comprises granulation; the granulation preferably comprises: and mixing the dried PEEK powder with the dried polytetrafluoroethylene powder, preparing PEEK-based granules from the obtained mixture by using a granulator, and drying for later use. The invention has no special requirement on the drying condition in the granulating process, and the drying condition which is well known in the field can be adopted.
The PEEK-based granules have no special requirements on the particle size, and can be formed by injection molding.
In the invention, the melt index of the polyether-ether-ketone at 380 ℃ is 50-100 g/10min, preferably 60-90 g/10min, and more preferably 70-80 g/10 min. The invention adopts the polyether-ether-ketone with the melt index to solve the problems of poor fluidity of the polyether-ether-ketone melt and difficult injection molding.
The invention has no special requirements on the fixing mode of the metal embedded sheet and can play a role in fixing.
In the invention, the temperature of the ribbon die is preferably 160-200 ℃, more preferably 170-190 ℃, and further preferably 180 ℃. The temperature of the die is controlled to be in the range, so that slow cooling is realized, the crystallinity of PEEK can be improved, stress concentration of inner and outer materials caused by different crystallinities is reduced, and the ring tension of the ribbon is improved.
In the present invention, the conditions of the injection molding process preferably include: the injection molding temperature is 375-385 ℃, the nozzle temperature of the injection molding machine is 380-390 ℃, and the injection molding pressure is 150-170 bar; further preferably, the injection molding temperature is 380 ℃, the nozzle temperature of the injection molding machine is 385 ℃, and the injection molding pressure is 155-165 bar.
The invention can improve the flow rate of the melt in a narrow die cavity by controlling the injection molding temperature and the temperature of the nozzle of the injection molding machine in the ranges; the situation that the material is not filled fully due to insufficient pressure can be avoided by controlling the injection molding pressure.
In the invention, the clamping force of the ribbon die is preferably 1000-1500N, more preferably 1100-1400N, and further preferably 1200-1300N. The invention can ensure the size accuracy of the sample by adopting higher clamping force.
After the injection is finished, the invention sequentially carries out pressure maintaining and cooling. In the invention, the time for the pressure maintaining is preferably 8-10 s. After the melt enters the die cavity, the surface of the sample piece shrinks due to the large temperature difference and the rapid cooling, and the melt can be supplemented in time by the proper pressure maintaining of the die.
In the invention, the cooling time is preferably 35-50 s, and more preferably 40-45 s. The cooling was timed from the end of the dwell. The invention is beneficial to complete cooling of the ribbon by controlling the cooling time within the range and can effectively avoid stress concentration and warping deformation of the product.
The high temperature resistant PEEK self-locking plastic cable tie and the method for manufacturing the same according to the present invention will be described in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.
Example 1
Drying polyether-ether-ketone at 120 ℃ for 8 hours, weighing 2kg of dried polyether-ether-ketone granules, fixing metal embedded sheets at corresponding positions in a binding belt mold, setting the mold temperature to be 180 ℃, the injection molding temperature to be 380 ℃, the nozzle temperature to be 385 ℃, the injection molding pressure to be 170bar, wherein the length, the width and the thickness of each metal embedded sheet are respectively as follows: 3.5mm, 1.8mm, 0.2 mm; and injecting the polyether-ether-ketone into the mold, maintaining the pressure for 10s and then cooling for 45s to obtain the ribbon.
Example 2
The difference from the embodiment 1 is that the length, width and thickness of the metal insert sheet are respectively as follows: 3.5mm, 1.8mm, 0.3 mm.
Example 3
The difference from the example 1 is that the injection temperature is 385 ℃, the nozzle temperature is 390 ℃, and the length, width and thickness of the metal insert are respectively as follows: 3.5mm, 1.8mm, 0.3 mm.
Comparative example 1
2kg of the dried fluoroplastic-containing pellets (ETFE (ethylene-tetrafluoroethylene copolymer), trade name EP-506, manufactured by Daiki Japan Industrial Co., Ltd.) were weighed, and the mold temperature, the injection temperature, 380 ℃ and the nozzle temperature, the injection pressure, 90bar and the length, width and thickness of the metal insert were set as follows: 3.5mm, 1.8mm, 0.3 mm.
And (3) performance testing:
1. tensile tests were conducted on each of the tapes in examples 1 to 3 and comparative example 1 using a universal tensile testing machine, and each condition was subjected to at least 10 ring tension performance analyses. The test conditions were: the diameter of the clamp is 32mm, the ring diameter E value of the cable tie is 30-40 mm, the stretching speed is 10mm/min, the sensor is 25kN, the test result is shown in figure 2, and the corresponding specific data are shown in table 1.
TABLE 1 Ring tension of bands prepared in examples 1-3 and comparative example 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Ring tension (N) | 482.39 | 567.57 | 575.82 | 277.85 |
As can be seen from FIG. 2 and Table 1, the tension values of the tie rings prepared by the polyether-ether-ketone in examples 1-3 are generally higher and are significantly higher than those of the fluoroplastic tie in comparative example 1. The thickness of the metal embedded sheet has a large influence on the ring tension value of the polyether-ether-ketone plastic ribbon, and when the thickness of the metal embedded sheet is 0.3mm, the ring tension is large and the use of the plastic ribbon is not influenced.
2. The bands of examples 1 to 3 and comparative example 1 were allowed to stand at 135 ℃ for 90 days, and then the ring tension was measured according to the method of 1, and the results are shown in Table 2,
TABLE 2 Ring tension of the ties of examples 1-3 and comparative example 1 after prolonged high temperature
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Ring tension (N) | 491.74 | 564.59 | 583.96 | 254.31 |
From the results in table 2, it can be seen that the loop tension of the cable ties prepared in examples 1-3 did not decrease significantly after 90 days of storage at 135 ℃, indicating that the cable ties of the present invention exhibit superior locking force under long term high temperature conditions.
3. High and low temperature cycle tests were performed on the bands of examples 1-3 and comparative example 1, with reference to GB/T2423.3A-2001 & GB/T2423.4A-2001. The results show that the cable ties prepared in the embodiments 1 to 3 have no phenomena of cracks, deformation, fracture, loosening of locking parts and the like; while the band prepared in comparative example 1 exhibited cracks locally.
4. The belts of examples 1-3 and comparative example 1 were subjected to a mold resistance test as part of GJB150.10A-2009 military equipment laboratory environment test method 10: and (4) testing the mold. The results show that the mold resistance ratings of the ties prepared in examples 1-3 and comparative example 1 are 0, indicating good mold resistance.
5. The ribbon prepared in the embodiment 1-3 and the ribbon prepared in the comparative example 1 are subjected to high-frequency vibration, the vibration frequency is 50-2000 Hz, the ribbon is vibrated up and down for 8 hours and then vibrated left and right for 8 hours, the vibration time is 16 hours, and the ribbon prepared in the embodiment 1-3 has no phenomena of cracks, deformation, fracture, loosening of locking parts and the like after vibration; and the band prepared in the comparative example 1 has a crack at the locking part, which shows that the band prepared in the invention has high-frequency vibration resistance.
In conclusion, under the conditions of long-term high-temperature and high-low temperature circulation, high-frequency vibration and potential mould corrosion, the polyether-ether-ketone plastic tie disclosed by the invention has excellent locking force and has a good application prospect as an engine locking part.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A high-temperature-resistant PEEK self-locking plastic binding belt comprises a head part, a body and a tail part; the head part is of a Chinese character hui-shaped structure, and a metal embedded sheet is arranged in the Chinese character hui-shaped structure; the inner side of the body is uniformly distributed with convex lattice structures; the head, the body and the tail are made of a material containing polyether ether ketone; the material containing the polyether-ether-ketone comprises polyether-ether-ketone and polytetrafluoroethylene; the material containing the polyether-ether-ketone comprises 80-100% of the polyether-ether-ketone and 0-20% of polytetrafluoroethylene.
2. The PEEK self locking plastic tie of claim 1, wherein the angle of the metal insert relative to the body is 45 °.
3. A PEEK self-locking plastic cable tie according to claim 1 or 2, wherein the length, width and thickness of the metal insert pieces are 3.0 to 3.8mm, 1.5 to 2.0mm and 0.2 to 0.35mm, respectively.
4. The PEEK self-locking plastic tie of claim 1, wherein the metal insert is stainless steel.
5. The PEEK self-locking plastic tie of claim 1, wherein the tail portion is thin in the middle and thick on both sides.
6. A method for preparing the high-temperature-resistant PEEK self-locking plastic cable tie of any one of claims 1 to 5, which comprises the following steps: fixing a metal embedded sheet at a corresponding position in a ribbon mold, then injecting a material containing polyether ether ketone into the mold by adopting an injection molding process, and sequentially maintaining pressure and cooling to obtain a high-temperature-resistant PEEK self-locking plastic ribbon;
the melt index of the polyether-ether-ketone at 380 ℃ is 50-100 g/10 min.
7. The preparation method according to claim 6, wherein the temperature of the ribbon die is 160 to 200 ℃, and the clamping force of the ribbon die is 1000 to 1500N.
8. The method of claim 6, wherein the conditions of the injection molding process include: the injection temperature is 375-385 ℃, the nozzle temperature of the injection molding machine is 380-390 ℃, and the injection pressure is 150-170 bar.
9. The production method according to claim 6, wherein the dwell time is 8 to 10 seconds.
10. The method according to claim 6, wherein the cooling time is 35 to 50 seconds.
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