1. A nanometer modified PET packing belt is characterized by comprising the following raw materials in parts by weight: 50-70 parts of waste PET particles, 20-30 parts of high-density polyethylene, 10-18 parts of glass fiber, 3-6 parts of crystallization reinforcing agent, 2-8 parts of zinc oxide, 1-2 parts of triethyl phosphate and 1-3 parts of chain extender.

2. The nano-modified PET packing belt according to claim 1, comprising the following raw materials in parts by weight: 55-65 parts of waste PET particles, 22-28 parts of high-density polyethylene, 12-16 parts of glass fiber, 4-5 parts of crystallization reinforcing agent, 2.4-7.2 parts of zinc oxide, 1.2-1.8 parts of triethyl phosphate and 1.5-2.5 parts of chain extender.

3. The nano-modified PET packing belt according to claim 1, comprising the following raw materials in parts by weight: 60 parts of waste PET particles, 25 parts of high-density polyethylene, 14 parts of glass fiber, 4.5 parts of crystallization reinforcing agent, 4.5 parts of zinc oxide, 1.5 parts of triethyl phosphate and 2 parts of chain extender.

4. The nano-modified PET strapping tape as claimed in claim 1, wherein the waste PET particles are prepared by the following method: (1) dissolving hydroxyethyl methacrylate in a mixed solvent of dimethyl ketone and water to obtain a mixed solution; (2) and (2) recycling, cleaning and crushing the waste PET material, adding the crushed waste PET material and polydimethylsiloxane into a kneader, adding the mixed solution obtained in the step (1), stirring and mixing for 20-40min at the temperature of 130-150 ℃, uniformly mixing, and extruding and granulating to obtain the PET material.

5. The nano-modified PET strapping tape as claimed in claim 4, wherein the mass ratio of hydroxyethyl methacrylate to dimethyl ketone to water in step (1) is 1-4:2-3: 2-5.

6. The nano-modified PET packing belt according to claim 4, wherein the mass ratio of the waste PET material, the polydimethylsiloxane and the mixed solution in the step (2) is 30-40:3-5: 18-25.

7. The nano-modified PET strapping tape as claimed in claim 1, wherein the crystallization enhancer is composed of aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate in a mass ratio of 6-9:3-4: 1-1.5.

8. The nano-modified PET strapping tape as claimed in claim 1, wherein the mass ratio of the zinc oxide to the triethyl phosphate is 2-4: 1.

9. The nano-modified PET strapping tape as claimed in claim 1, wherein the chain extender is one or more of succinic anhydride, dodecenylsuccinic anhydride, methacrylic anhydride, methanesulfonic anhydride, 2, 3-dimethylmaleic anhydride, crotonic anhydride and hexanoic anhydride.

10. A method for preparing the nano modified PET strapping tape according to any one of claims 1 to 9, comprising the following steps:

s1, weighing 50-70 parts of waste PET particles, 20-30 parts of high-density polyethylene, 10-18 parts of glass fiber, 3-6 parts of crystallization reinforcing agent, 2-8 parts of zinc oxide, 1-2 parts of triethyl phosphate and 1-3 parts of chain extender;

s2, placing the waste PET particles and the high-density polyethylene together at the temperature of 80-100 ℃, drying for 3-5h, then adding the dried materials, the glass fiber and the chain extender together into a high-speed mixer, and premixing for 0.5-1h at the temperature of 150-180 ℃ to obtain a premix;

s3, keeping the temperature, sequentially adding zinc oxide and triethyl phosphate into the premix obtained in the step S2, stirring and mixing for 10-20min, finally adding a crystallization reinforcing agent, uniformly mixing, and extruding the mixture into a belt shape through a double-screw extruder.

Background

A plastic strapping band is a uniaxially oriented plastic strapping material. The seventies began to introduce into China. Because of its advantages of light weight, high strength, corrosion resistance and convenient use, it can replace the packing belt made of iron sheet and paper strip and can be developed quickly. With the development of the packaging industry, the demand of plastic packing belts is getting larger and larger, and the production of the plastic packing belts tends to increase by times.

PET (polyethylene terephthalate) is a linear thermoplastic resin and is one of the most widely used engineering plastics. The density is (1.3-1.4) g/cm3, the Intrinsic Viscosity (IV) is (0.62-1.20) ml/g, and the melting point is (245-. The PET plastic is transparent, has high glossiness, and has better weather resistance, chemical stability, impact resistance, creep resistance and dimensional stability; it has high heat resistance, can maintain excellent physical and mechanical performance in wide temperature range, and is high value resin. The PET packing belt is a polyester packing belt formed by extruding PET as a main raw material and performing unidirectional stretching, is the most popular novel environment-friendly packing material for replacing steel belts, steel wires and heavy PP packing belts internationally at present, and has the advantages that: (1) the steel belt has strong tensile resistance, is as good as steel belt, has impact-resistant ductility, and can ensure the transportation safety of products; (2) the elongation is small, the elongation is only one sixth of that of the polypropylene belt, and the tension can be kept for a long time; (3) the safety is good, the defect that the bundled objects are polluted by rusting of the steel belt is avoided, and the color is bright and can be identified; (4) the economic benefit is good, the length of 1 ton of PET packing belt is equivalent to the length of 6 ton of steel belt with the same specification, the single price per meter is lower than that of the steel belt by more than 40 percent, and the packing cost can be greatly reduced.

The PET molecule has rigid groups on the main chain, so the heat resistance is high; but the existence of the rigid structure causes poor molecular chain flexibility and high glass transition temperature, blocks the movement of molecular chain segments, further causes the defects of slow crystallization rate, difficult molding processing, high mold temperature, long molding period, poor impact strength and the like, and greatly limits the application range of the composite material. The Chinese patent publication No. CN112646333A discloses a modified PET material, which mainly comprises the following components in parts by mass: 70-80 parts of PET, 15-20 parts of PA66, 0.1-0.2 part of antioxidant, 3-7 parts of inorganic filler, 7-8 parts of compatibilizer and 0.8-1.5 parts of coupling agent. In the patent, a large number of amido groups, terminal amino groups and carboxyl groups are contained in molecules, hydrogen bonds with high density can be formed among the molecules, the crystallization speed is relatively high, the PA66 with excellent mechanical strength and good molding processing performance is complemented with PET, but the PA66 has the defects of high water absorption, poor dimensional stability, insufficient heat resistance and the like; PET itself is also a hygroscopic polymer that rapidly absorbs moisture from the air. The trace moisture remained in the material can cause the resin to generate water degradation in the process of PET heating forming, and the Intrinsic Viscosity (IV) is reduced, thereby leading to the reduction of the mechanical property of the product. Therefore, the PA66 is selected to aggravate the water degradation degree, and further aggravate the reduction of the mechanical property of the product. Based on the statement, the invention provides a nano modified PET packing belt.

Disclosure of Invention

The invention aims to solve the problems of slow crystallization rate, difficult forming and processing, high mold temperature, long forming period and poor impact strength in the production process of a PET packing belt in the prior art, and provides a nano modified PET packing belt.

A nano modified PET packing belt comprises the following raw materials in parts by weight: 50-70 parts of waste PET particles, 20-30 parts of high-density polyethylene, 10-18 parts of glass fiber, 3-6 parts of crystallization reinforcing agent, 2-8 parts of zinc oxide, 1-2 parts of triethyl phosphate and 1-3 parts of chain extender.

Preferably, the nano modified PET packing belt comprises the following raw materials in parts by weight: 55-65 parts of waste PET particles, 22-28 parts of high-density polyethylene, 12-16 parts of glass fiber, 4-5 parts of crystallization reinforcing agent, 2.4-7.2 parts of zinc oxide, 1.2-1.8 parts of triethyl phosphate and 1.5-2.5 parts of chain extender.

Preferably, the nano modified PET packing belt comprises the following raw materials in parts by weight: 60 parts of waste PET particles, 25 parts of high-density polyethylene, 14 parts of glass fiber, 4.5 parts of crystallization reinforcing agent, 4.5 parts of zinc oxide, 1.5 parts of triethyl phosphate and 2 parts of chain extender.

Preferably, the waste PET particles are prepared by the following method: (1) dissolving hydroxyethyl methacrylate in a mixed solvent of dimethyl ketone and water to obtain a mixed solution; (2) and (2) recycling, cleaning and crushing the waste PET material, adding the crushed waste PET material and polydimethylsiloxane into a kneader, adding the mixed solution obtained in the step (1), stirring and mixing for 20-40min at the temperature of 130-150 ℃, uniformly mixing, and extruding and granulating to obtain the PET material.

Preferably, the mass ratio of the hydroxyethyl methacrylate to the dimethyl ketone to the water in the step (1) is 1-4:2-3: 2-5.

Preferably, the mass ratio of the waste PET material, the polydimethylsiloxane and the mixed solution in the step (2) is 30-40:3-5: 18-25.

Preferably, the crystallization enhancer consists of aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate in a mass ratio of 6-9:3-4: 1-1.5.

Preferably, the mass ratio of the zinc oxide to the triethyl phosphate is 2-4: 1.

Preferably, the chain extender is one or more of succinic anhydride, dodecenyl succinic anhydride, methacrylic anhydride, methanesulfonic anhydride, 2, 3-dimethylmaleic anhydride, crotonic anhydride and hexanoic anhydride.

The invention also provides a preparation method of the nano modified PET packing belt, which comprises the following steps:

s1, weighing 50-70 parts of waste PET particles, 20-30 parts of high-density polyethylene, 10-18 parts of glass fiber, 3-6 parts of crystallization reinforcing agent, 2-8 parts of zinc oxide, 1-2 parts of triethyl phosphate and 1-3 parts of chain extender;

s2, placing the waste PET particles and the high-density polyethylene together at the temperature of 80-100 ℃, drying for 3-5h, then adding the dried materials, the glass fiber and the chain extender together into a high-speed mixer, and premixing for 0.5-1h at the temperature of 150-180 ℃ to obtain a premix;

s3, keeping the temperature, sequentially adding zinc oxide and triethyl phosphate into the premix obtained in the step S2, stirring and mixing for 10-20min, finally adding a crystallization reinforcing agent, uniformly mixing, and extruding the mixture into a belt shape through a double-screw extruder.

The nano modified PET packing belt provided by the invention has the following beneficial effects:

1. the waste PET is recycled and then is pretreated, then is mixed with high-density polyethylene for dehumidification, is reinforced by glass fiber under the action of a chain extender, and is finally mixed with zinc oxide, triethyl phosphate and a crystallization reinforcing agent and then is extruded and molded to obtain the PET material; the preparation method is simple, the preparation conditions are mild, the waste PET is selected as the main raw material, the cost is low, the environment is protected, and the obtained PET packing belt has excellent performance of the traditional PET packing belt, and meanwhile, the plasticity is better, the breaking tension is stronger, and the impact strength is higher.

2. In the invention, hydroxyethyl methacrylate is dissolved in a mixed solvent of dimethyl ketone and water to obtain a mixed solution, and in the presence of the mixed solution, the recovered and crushed waste PET material is pretreated by adopting polydimethylsiloxane to prepare waste PET particles; hydroxyethyl methacrylate can obviously improve the permeability and the cohesiveness of PET, and polydimethylsiloxane can effectively improve the hygroscopicity of PET; the waste PET particles obtained by the invention are compounded with high-density polyethylene for use, the bonding property of the waste PET particles and the high-density polyethylene is strong, the comprehensive performance is increased, and the obtained PET packing belt has the advantages of good toughness, good plasticity, easy processing and forming, short forming period and high impact strength.

3. According to the invention, aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate are adopted to form a crystallization reinforcing agent, and the addition of the crystallization reinforcing agent can increase intermolecular density and attraction among molecular chains, so that the crystallization speed is remarkably accelerated, and the mechanical property and the thermal property of the obtained PET packing belt are correspondingly improved; according to the invention, the proper proportion is selected, the zinc oxide and the triethyl phosphate are added in a compounding manner, the aging resistance and the flame retardant property of the PET packing belt can be effectively improved, and the obtained PET packing belt has excellent comprehensive performance and wide application range.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Example one

The invention provides a nano modified PET packing belt which comprises the following raw materials in parts by weight: 50 parts of waste PET particles, 20 parts of high-density polyethylene, 10 parts of glass fiber, 3 parts of crystallization reinforcing agent, 2 parts of zinc oxide, 1 part of triethyl phosphate and 1 part of chain extender;

the waste PET particles are prepared by the following method: (1) dissolving hydroxyethyl methacrylate in a mixed solvent of dimethyl ketone and water to obtain a mixed solution; (2) recycling, cleaning and crushing waste PET materials, adding the crushed waste PET materials and polydimethylsiloxane into a kneader, adding the mixed solution obtained in the step (1), stirring and mixing the mixed solution for 20min at the temperature of 130 ℃, uniformly mixing the mixed solution, and extruding and granulating the mixed solution to obtain the PET material; in the step (1), the mass ratio of the hydroxyethyl methacrylate to the dimethyl ketone to the water is 1:2: 2; the mass ratio of the waste PET material, the polydimethylsiloxane and the mixed solution in the step (2) is 30:3: 18;

the crystallization enhancer consists of aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate in a mass ratio of 6:3: 1;

the mass ratio of the zinc oxide to the triethyl phosphate is 2: 1;

the chain extender is succinic anhydride.

The invention also provides a preparation method of the nano modified PET packing belt, which comprises the following steps:

s1, weighing 50 parts of waste PET particles, 20 parts of high-density polyethylene, 10 parts of glass fiber, 3 parts of crystallization reinforcing agent, 2 parts of zinc oxide, 1 part of triethyl phosphate and 1 part of chain extender;

s2, placing the waste PET particles and the high-density polyethylene together at the temperature of 80 ℃, drying for 3 hours, then adding the dried materials, the glass fiber and the chain extender together into a high-speed mixer, and premixing for 0.5 hour at the temperature of 150 ℃ to obtain a premix;

s3, keeping the temperature, sequentially adding zinc oxide and triethyl phosphate into the premix obtained in the step S2, stirring and mixing for 10min, finally adding a crystallization reinforcing agent, uniformly mixing, and extruding the mixture into a belt shape through a double-screw extruder.

Example two

The invention provides a nano modified PET packing belt which comprises the following raw materials in parts by weight: 55 parts of waste PET particles, 22 parts of high-density polyethylene, 12 parts of glass fiber, 4 parts of crystallization reinforcing agent, 2.4 parts of zinc oxide, 1.2 parts of triethyl phosphate and 1.5 parts of chain extender;

the waste PET particles are prepared by the following method: (1) dissolving hydroxyethyl methacrylate in a mixed solvent of dimethyl ketone and water to obtain a mixed solution; (2) recycling, cleaning and crushing waste PET materials, adding the crushed waste PET materials and polydimethylsiloxane into a kneader, adding the mixed solution obtained in the step (1), stirring and mixing the mixed solution at the temperature of 135 ℃ for 25min, uniformly mixing the mixed solution, and extruding and granulating the mixed solution to obtain the PET material; in the step (1), the mass ratio of the hydroxyethyl methacrylate to the dimethyl ketone to the water is 2:2.5: 3; the mass ratio of the waste PET material, the polydimethylsiloxane and the mixed solution in the step (2) is 8:1: 5;

the crystallization enhancer consists of aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate in a mass ratio of 7:3.5: 1;

the mass ratio of the zinc oxide to the triethyl phosphate is 2.5: 1;

the chain extender is dodecenyl succinic anhydride.

The invention also provides a preparation method of the nano modified PET packing belt, which comprises the following steps:

s1, weighing 55 parts of waste PET particles, 22 parts of high-density polyethylene, 12 parts of glass fiber, 4 parts of crystallization reinforcing agent, 2.4 parts of zinc oxide, 1.2 parts of triethyl phosphate and 1.5 parts of chain extender;

s2, drying the waste PET particles and the high-density polyethylene at 85 ℃ for 3-5h, adding the dried materials, the glass fiber and the chain extender into a high-speed mixer, and premixing for 0.6h at 155 ℃ to obtain a premix;

s3, keeping the temperature, sequentially adding zinc oxide and triethyl phosphate into the premix obtained in the step S2, stirring and mixing for 12min, finally adding a crystallization reinforcing agent, uniformly mixing, and extruding the mixture into a belt shape through a double-screw extruder.

EXAMPLE III

The invention provides a nano modified PET packing belt which comprises the following raw materials in parts by weight: 60 parts of waste PET particles, 25 parts of high-density polyethylene, 14 parts of glass fiber, 4.5 parts of crystallization reinforcing agent, 4.5 parts of zinc oxide, 1.5 parts of triethyl phosphate and 2 parts of chain extender;

the waste PET particles are prepared by the following method: (1) dissolving hydroxyethyl methacrylate in a mixed solvent of dimethyl ketone and water to obtain a mixed solution; (2) recycling, cleaning and crushing waste PET materials, adding the crushed waste PET materials and polydimethylsiloxane into a kneader together, adding the mixed solution obtained in the step (1), stirring and mixing the materials for 30min at the temperature of 140 ℃, uniformly mixing the materials, and extruding and granulating the materials to obtain the PET material; in the step (1), the mass ratio of the hydroxyethyl methacrylate to the dimethyl ketone to the water is 3:2.5: 3; the mass ratio of the waste PET material, the polydimethylsiloxane and the mixed solution in the step (2) is 35:4: 22;

the crystallization enhancer consists of aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate in a mass ratio of 7.5:3.5: 1.2;

the mass ratio of the zinc oxide to the triethyl phosphate is 3: 1;

the chain extender is methacrylic anhydride.

The invention also provides a preparation method of the nano modified PET packing belt, which comprises the following steps:

s1, weighing 60 parts of waste PET particles, 25 parts of high-density polyethylene, 14 parts of glass fiber, 4.5 parts of crystallization reinforcing agent, 4.5 parts of zinc oxide, 1.5 parts of triethyl phosphate and 2 parts of chain extender;

s2, placing the waste PET particles and the high-density polyethylene together at a temperature of 90 ℃, drying for 4 hours, then adding the dried materials, the glass fiber and the chain extender together into a high-speed mixer, and premixing for 0.8 hour at a temperature of 165 ℃ to obtain a premix;

s3, keeping the temperature, sequentially adding zinc oxide and triethyl phosphate into the premix obtained in the step S2, stirring and mixing for 15min, finally adding a crystallization reinforcing agent, uniformly mixing, and extruding the mixture into a belt shape through a double-screw extruder.

Example four

The invention provides a nano modified PET packing belt which comprises the following raw materials in parts by weight: 65 parts of waste PET particles, 28 parts of high-density polyethylene, 16 parts of glass fiber, 5 parts of crystallization reinforcing agent, 7.2 parts of zinc oxide, 1.8 parts of triethyl phosphate and 2.5 parts of chain extender;

the waste PET particles are prepared by the following method: (1) dissolving hydroxyethyl methacrylate in a mixed solvent of dimethyl ketone and water to obtain a mixed solution; (2) recycling, cleaning and crushing waste PET materials, adding the crushed waste PET materials and polydimethylsiloxane into a kneader, adding the mixed solution obtained in the step (1), stirring and mixing for 35min at the temperature of 145 ℃, uniformly mixing, and extruding and granulating to obtain the PET material; in the step (1), the mass ratio of the hydroxyethyl methacrylate to the dimethyl ketone to the water is 3:3: 2; the mass ratio of the waste PET material, the polydimethylsiloxane and the mixed solution in the step (2) is 7:1: 5;

the crystallization enhancer consists of aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate in a mass ratio of 8:3: 1.5;

the mass ratio of the zinc oxide to the triethyl phosphate is 3.5: 1;

the chain extender is 2, 3-dimethylmaleic anhydride.

The invention also provides a preparation method of the nano modified PET packing belt, which comprises the following steps:

s1, weighing 65 parts of waste PET particles, 28 parts of high-density polyethylene, 16 parts of glass fiber, 5 parts of crystallization reinforcing agent, 7.2 parts of zinc oxide, 1.8 parts of triethyl phosphate and 2.5 parts of chain extender;

s2, drying the waste PET particles and the high-density polyethylene at 95 ℃ for 3-5h, adding the dried materials, the glass fiber and the chain extender into a high-speed mixer, and premixing for 0.8h at 170 ℃ to obtain a premix;

s3, keeping the temperature, sequentially adding zinc oxide and triethyl phosphate into the premix obtained in the step S2, stirring and mixing for 18min, finally adding a crystallization reinforcing agent, uniformly mixing, and extruding the mixture into a belt shape through a double-screw extruder.

EXAMPLE five

The invention provides a nano modified PET packing belt which comprises the following raw materials in parts by weight: 70 parts of waste PET particles, 30 parts of high-density polyethylene, 18 parts of glass fiber, 6 parts of crystallization reinforcing agent, 8 parts of zinc oxide, 2 parts of triethyl phosphate and 3 parts of chain extender;

the waste PET particles are prepared by the following method: (1) dissolving hydroxyethyl methacrylate in a mixed solvent of dimethyl ketone and water to obtain a mixed solution; (2) recycling, cleaning and crushing waste PET materials, adding the crushed waste PET materials and polydimethylsiloxane into a kneader together, adding the mixed solution obtained in the step (1), stirring and mixing the mixed solution for 40min at the temperature of 150 ℃, uniformly mixing the mixed solution, and extruding and granulating the mixed solution to obtain the PET material; in the step (1), the mass ratio of the hydroxyethyl methacrylate to the dimethyl ketone to the water is 4:3: 5; the mass ratio of the waste PET material, the polydimethylsiloxane and the mixed solution in the step (2) is 8:1: 5;

the crystallization enhancer consists of aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate in a mass ratio of 9:4: 1.5;

the mass ratio of the zinc oxide to the triethyl phosphate is 4: 1;

the chain extender is crotonic anhydride.

The invention also provides a preparation method of the nano modified PET packing belt, which comprises the following steps:

s1, weighing 70 parts of waste PET particles, 30 parts of high-density polyethylene, 18 parts of glass fiber, 6 parts of crystallization reinforcing agent, 8 parts of zinc oxide, 2 parts of triethyl phosphate and 3 parts of chain extender;

s2, placing the waste PET particles and the high-density polyethylene together at the temperature of 100 ℃, drying for 5 hours, then adding the dried materials, the glass fiber and the chain extender together into a high-speed mixer, and premixing for 1 hour at the temperature of 180 ℃ to obtain a premix;

s3, keeping the temperature, sequentially adding zinc oxide and triethyl phosphate into the premix obtained in the step S2, stirring and mixing for 20min, finally adding a crystallization reinforcing agent, uniformly mixing, and extruding the mixture into a belt shape through a double-screw extruder.

Comparative example 1

The invention provides a nano modified PET packing belt which comprises the following raw materials in parts by weight: 50 parts of waste PET particles, 20 parts of high-density polyethylene, 10 parts of glass fiber, 3 parts of crystallization reinforcing agent, 2 parts of zinc oxide, 1 part of triethyl phosphate and 1 part of chain extender;

the waste PET particles are prepared by the following method: recycling, cleaning and crushing waste PET materials to obtain the PET material;

the crystallization enhancer consists of aluminum dihydrogen phosphate, isopropanol and tetrabutylammonium acetate in a mass ratio of 6:3: 1;

the mass ratio of the zinc oxide to the triethyl phosphate is 2: 1;

the chain extender is succinic anhydride.

The invention also provides a preparation method of the nano modified PET packing belt, which comprises the following steps:

s1, weighing 50 parts of waste PET particles, 20 parts of high-density polyethylene, 10 parts of glass fiber, 3 parts of crystallization reinforcing agent, 2 parts of zinc oxide, 1 part of triethyl phosphate and 1 part of chain extender;

s2, placing the waste PET particles and the high-density polyethylene together at the temperature of 80 ℃, drying for 3 hours, then adding the dried materials, the glass fiber and the chain extender together into a high-speed mixer, and premixing for 0.5 hour at the temperature of 150 ℃ to obtain a premix;

s3, keeping the temperature, sequentially adding zinc oxide and triethyl phosphate into the premix obtained in the step S2, stirring and mixing for 10min, finally adding a crystallization reinforcing agent, uniformly mixing, and extruding the mixture into a belt shape through a double-screw extruder.

The PET strapping bands prepared in the first to fifth examples of the present invention and the first comparative example were respectively manufactured into a specification of 12.7mm in width and 0.6mm in thickness, and the performance of the strapping bands was measured to obtain the following results:

the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.