CN110776735B - High-strength nylon cable tie and preparation method thereof - Google Patents

Abstract

The invention discloses a high-strength nylon cable tie and a preparation method thereof, relating to the technical field of cable ties, wherein the nylon cable tie comprises the following raw materials in parts by weight: nylon 121290 and 110 portions; 1-2 parts of an antioxidant; 2-3 parts of a lubricant; 10-14 parts of a plasticizer; 18-22 parts of polyethylene; 12-14 parts of oxazoline grafted polyethylene. In the system, the disperse phase polyethylene is used as a stress concentration body, so that the crazing and shear yield of a nylon 1212 matrix are increased, and the crazing and shear yield can absorb a large amount of energy, so that the mixed system shows good toughness when being impacted, and the strength of the mixed system is effectively improved. The addition of oxazoline grafted polyethylene can effectively improve the compatibility between polyethylene and nylon 1212, so that the pseudoplastic taste of the polyethylene is enhanced, the viscous flow activation is increased, the melt mass flow rate is reduced, the mechanical property is obviously improved, and the toughening effect of the polyethylene on the nylon 1212 is improved.

Description

High-strength nylon cable tie and preparation method thereof

Technical Field

The invention relates to the technical field of cable ties, in particular to a high-strength nylon cable tie and a preparation method thereof.

Background

The ribbon, as the name suggests is the belt that is used for bundling things, designs the stopping function, can only tighten more and more, also has the removable ribbon.

Chinese patent with publication number CN107974083A discloses a nylon cable tie composite material and a preparation method thereof, wherein the composite material comprises the following raw materials in percentage by weight: 60-88% of nylon, 10-25% of toughening compatilizer, 0-1% of antioxidant and 0-2% of lubricant; wherein, the toughening compatilizer is selected from one or more of maleic anhydride grafted metallocene ethylene copolymer, maleic anhydride and acrylate bifunctional grafted ethylene elastomer and maleic anhydride grafted ethylene propylene diene monomer.

However, in the prior art, the strength of the nylon cable tie is improved by the cable tie only through the toughening compatibilizer, and the improvement range is limited and needs to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a high-strength nylon cable tie which has the advantage of high strength.

In order to achieve the purpose, the invention provides the following technical scheme:

a high-strength nylon cable tie comprises the following raw materials in parts by weight,

by adopting the technical scheme, in the system, the disperse phase polyethylene is used as a stress concentration body, so that the crazing and shear yield of the nylon 1212 matrix are increased, and the crazing and shear yield can absorb a large amount of energy, so that the mixed system shows good toughness when being impacted, and the strength of the mixed system is effectively improved.

The addition of oxazoline grafted polyethylene can effectively improve the compatibility between polyethylene and nylon 1212, so that the pseudoplastic taste of the polyethylene is enhanced, the viscous flow activation is increased, the melt mass flow rate is reduced, the mechanical property is obviously improved, and the toughening effect of the polyethylene on the nylon 1212 is improved.

Further, the antioxidant is antioxidant 1098.

By adopting the technical scheme, the chemical name of the antioxidant 1098 is N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, and the antioxidant 1098 has good antioxidation effect and can effectively reduce the aging speed of granules.

Furthermore, the raw materials comprise 2-3 parts of nano glass beads by weight.

By adopting the technical scheme, the rigidity of the system can be effectively improved by adding the nano glass beads. Meanwhile, the nano glass beads can play a role similar to a bearing, and the dispersion uniformity of each component in the system is improved.

Further, the plasticizer adopts N-butyl-p-toluenesulfonamide.

Through adopting above-mentioned technical scheme, when N-butyl para toluene sulfonamide endowed the system good plasticity, can also destroy the macromolecule in the inherent crystallization zone of nylon hydrogen bond to form random loose cleanness with the nylon macromolecule, make nylon molecular chain compliance increase, the ability of resisting external force deformation descends, nevertheless because the compliance increases the back, the molecular chain easily extends, also easily slides each other between the molecular chain section, so elongation at break has obtained showing the promotion.

Further, the raw material comprises 2-3 parts by weight of polyacrylamide.

By adopting the technical scheme, the polyacrylamide has excellent performances such as thickening property, shearing resistance and dispersibility, the dispersion uniformity of a system can be effectively improved, and the polyacrylamide can achieve a synergistic toughening effect on the N-butyl-p-toluenesulfonamide.

Further, the raw material comprises 6-8 parts by weight of white electric oil.

By adopting the technical scheme, the white electric oil is also called n-heptane, has good lubricating property, can effectively improve the lubricating property of the surface of the nano glass beads, improves the dispersibility of the glass beads in the system, and can also effectively improve the dispersion effect of the glass beads on each component of the system, thereby improving the fluidity of the system. In addition, the white gasoline has high volatility and is continuously volatilized in the system granulation and forming processes, so that the components are tightly connected in the system, and a high-flexibility finished product can be obtained while a high-fluidity melt is obtained.

The invention also aims to provide a preparation method of the high-strength nylon cable tie, which comprises the following steps:

s1, preparing a mixture: mixing and uniformly stirring nylon 1212, an antioxidant 1098, N-butyl p-toluenesulfonamide, polyethylene, oxazoline grafted polyethylene, nano glass beads, polyacrylamide and white gasoline to obtain a mixture;

s2, extrusion granulation: extruding, drawing, cooling and granulating the mixture at the temperature of 240-260 ℃ to form a granular material;

s3, injection molding: and (3) performing injection molding and extrusion on the granular material, and cooling and forming to obtain the finished product of the ribbon.

In conclusion, the invention has the following beneficial effects:

1. the dispersed-phase polyethylene is used as a stress concentrator, so that the crazing and shear yield of the nylon 1212 matrix are increased, and the crazing and shear yield can absorb a large amount of energy, so that the mixed system shows good toughness when being impacted, and the strength of the mixed system is effectively improved;

2. the addition of oxazoline grafted polyethylene can effectively improve the compatibility between polyethylene and nylon 1212, so that the pseudoplastic taste of the polyethylene is enhanced, the viscous flow activation is increased, the melt mass flow rate is reduced, the mechanical property is obviously improved, and the toughening effect of the polyethylene on the nylon 1212 is improved;

3. by adding the nano glass beads, the rigidity of the system can be effectively improved. Meanwhile, the nano glass beads can play a role similar to a bearing, so that the dispersion uniformity of each component in the system is improved;

the N-butyl p-toluenesulfonamide endows the system with good plasticity, and simultaneously can destroy the hydrogen bonds among macromolecules in the inherent crystallization area of the nylon, and form irregular loose cleaning with the nylon macromolecules, so that the flexibility of a nylon molecular chain is increased, the capacity of resisting external force deformation is reduced, but after the flexibility is increased, the molecular chain is easy to stretch, and the molecular chain segments are easy to slide mutually, so that the elongation at break is obviously improved;

5. the polyacrylamide has excellent performances of thickening property, shearing resistance, dispersibility and the like, can effectively improve the dispersion uniformity of a system, and can achieve a synergistic toughening effect on the N-butyl-p-toluenesulfonamide;

6. the white electric oil is also called n-heptane, has good lubricating property, can effectively improve the lubricating property of the surface of the nano glass beads, improves the dispersibility of the glass beads in a system, and can also effectively improve the dispersion effect of the glass beads on each component of the system, thereby improving the fluidity of the system. In addition, the white gasoline has high volatility and is continuously volatilized in the system granulation and forming processes, so that the components are tightly connected in the system, and a high-flexibility finished product can be obtained while a high-fluidity melt is obtained.

Drawings

FIG. 1 is a flow chart of a method provided by the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples.

Examples

Example 1

The high-strength nylon cable tie comprises the raw material components in parts by weight shown in Table 1.

The antioxidant adopts an antioxidant 1098, and the plasticizer adopts N-butyl-p-toluenesulfonamide.

As shown in fig. 1, the preparation method of the high-strength nylon cable tie comprises the following steps:

s1, preparing a mixture: mixing and uniformly stirring nylon 1212, an antioxidant 1098, N-butyl p-toluenesulfonamide, polyethylene, oxazoline grafted polyethylene, nano glass beads, polyacrylamide and white gasoline to obtain a mixture;

s2, extrusion granulation: extruding, drawing, cooling and granulating the mixture at 240 ℃ to form granular materials;

and S3, injection molding, namely extruding the granules through an injection molding machine, and cooling and molding to obtain the finished product ribbon.

Example 2

The high-strength nylon cable tie comprises the raw material components in parts by weight shown in Table 1.

The antioxidant adopts an antioxidant 1098, and the plasticizer adopts N-butyl-p-toluenesulfonamide.

The preparation method of the high-strength nylon cable tie comprises the following steps:

s1, preparing a mixture: mixing and uniformly stirring nylon 1212, an antioxidant 1098, N-butyl p-toluenesulfonamide, polyethylene, oxazoline grafted polyethylene, nano glass beads, polyacrylamide and white gasoline to obtain a mixture;

s2, extrusion granulation: extruding, drawing, cooling and granulating the mixture at 250 ℃ to form granules;

and S3, injection molding, namely extruding the granules through an injection molding machine, and cooling and molding to obtain the finished product ribbon.

Example 3

The high-strength nylon cable tie comprises the raw material components in parts by weight shown in Table 1.

The antioxidant adopts an antioxidant 1098, and the plasticizer adopts N-butyl-p-toluenesulfonamide.

The preparation method of the high-strength nylon cable tie comprises the following steps:

s1, preparing a mixture: mixing and uniformly stirring nylon 1212, an antioxidant 1098, N-butyl p-toluenesulfonamide, polyethylene, oxazoline grafted polyethylene, nano glass beads, polyacrylamide and white gasoline to obtain a mixture;

s2, extrusion granulation: extruding, drawing, cooling and granulating the mixture at 260 ℃ to form granules;

and S3, injection molding, namely extruding the granules through an injection molding machine, and cooling and molding to obtain the finished product ribbon.

Example 4

The difference from the example 2 is that the raw material components are shown in the table 1 according to the parts by weight.

Wherein the plasticizer is replaced by dioctyl phthalate by N-butyl-p-toluenesulfonamide.

Example 5

The difference from the example 2 is that the raw material components are shown in the table 1 according to the parts by weight.

Example 6

The difference from the example 2 is that the raw material components are shown in the table 1 according to the parts by weight.

Example 7

The difference from the example 2 is that the raw material components are shown in the table 1 according to the parts by weight.

Comparative example

Comparative example 1

The difference from the example 2 is that the raw material components are shown in the table 1 according to the parts by weight.

Comparative example 2

The difference from the example 2 is that the raw material components are shown in the table 1 according to the parts by weight.

Performance test

Tensile strength test: the samples of each example and comparative example were subjected to tensile strength tests in accordance with ASTM D638 Standard test method for tensile Properties of Plastic products, the test structures of which are shown in Table 2.

Cantilever beam notch impact strength test: notched Izod impact strength tests were carried out on samples of each example and comparative example with reference to ASTM D256-1997 Standard test method for Izod impact testing of plastics, the test results being shown in Table 2.

Table 1 (Nylon cable tie raw material formula table)

TABLE 1 continuation

TABLE 2

As can be seen from tables 1 and 2, in comparative examples 1 and 2, it can be seen that the addition of polyethylene and oxazoline grafted polyethylene can improve the tensile strength of the nylon cable tie and the notched izod impact strength. As can be seen from example 4, N-butyl-p-toluenesulfonamide as a plasticizer had a more significant effect on the enhancement of the system than the common plasticizer, dioctyl phthalate. Combining example 4 and example 6, it can be seen that the N-butyl-p-toluenesulfonamide and polyacrylamide have synergistic toughening effect in the system. It is understood from the combination of examples 1 to 3 and example 7 that the addition of the white mineral oil improves the fluidity of the melt and improves the tensile strength and notched izod impact strength of the final product by its own volatilization characteristics.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (2)

1. The utility model provides a high strength nylon ribbon which characterized in that: the raw materials comprise the following components in parts by weight,

nylon 121290 and 110 portions;

1-2 parts of an antioxidant;

10-14 parts of a plasticizer;

18-22 parts of polyethylene;

12-14 parts of oxazoline grafted polyethylene;

2-3 parts of polyacrylamide;

2-3 parts of nano glass beads;

6-8 parts of white kerosene;

the antioxidant is an antioxidant 1098, and the plasticizer is N-butyl-p-toluenesulfonamide.

2. The method for preparing a high-strength nylon cable tie according to claim 1, wherein the method comprises the following steps: comprises the following steps of (a) carrying out,

s1, preparing a mixture: mixing and uniformly stirring nylon 1212, an antioxidant 1098, N-butyl p-toluenesulfonamide, polyethylene, oxazoline grafted polyethylene, nano glass beads, polyacrylamide and white gasoline to obtain a mixture;

s2, extrusion granulation: extruding, drawing, cooling and granulating the mixture at the temperature of 240-260 ℃ to form a granular material;

s3, injection molding: and (3) performing injection molding and extrusion on the granular material, and cooling and forming to obtain the finished product of the ribbon.

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