Low-temperature-resistant cable tie and production process thereof

Abstract

According to the scheme, the low-temperature-resistant cable tie comprises a tooth layer and a back bottom layer with the thickness ratio being 1: 1-2, the tooth layer comprises tooth particles and a tooth base, and the tooth base is connected with the back bottom layer; the tooth layer comprises the following components in parts by mass: 70-80 parts of nylon and 20-30 parts of a toughening agent A; and the back bottom layer comprises the following components in parts by mass: 60-80 parts of nylon and 20-30 parts of a toughening agent B. According to the scheme, the ribbon of a double-layer structure is designed, the problem of fracture caused by tensile stress concentration of the back bottom layer during low-temperature use can be better solved, a stress buffering effect is achieved at the junction, and the prepared low-temperature-resistant ribbon can still be used at the temperature of 70 DEG C below zero.

Description

Technical Field

[0001] This invention relates to the field of cable ties, and more specifically to a low-temperature resistant cable tie and its manufacturing process. Background Technology

[0002] Nylon is a commonly used material for cable ties, and it exhibits good mechanical properties at room temperature, generally meeting the needs of various applications. However, at low temperatures, nylon's mechanical properties decline due to crystallization and reduced self-lubrication, resulting in decreased tensile strength and elongation at break. Under tight binding conditions, the cable tie is prone to brittle fracture due to tensile stress. Although there is research on low-temperature resistant cable ties in existing technologies, it does not consider the impact of stress states during service. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a low-temperature resistant cable tie and its manufacturing process. The cable tie features a double-layer structure, which better addresses the issue of stress concentration in the bottom layer leading to breakage during low-temperature use. Furthermore, the junction provides stress buffering, ensuring that the cable tie remains usable even at -70°C.

[0004] Special toughening agents are formulated to address the stress characteristics of different layers, which can better cope with the crystallization and embrittlement of nylon components during low-temperature processes. They have good compatibility with nylon and improve the low-temperature resistance of cable ties.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: This solution proposes a low-temperature resistant cable tie, comprising a tooth layer and a backing layer with a thickness ratio of 1:1-2. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the backing layer. The tooth layer comprises, by weight, 70-80 parts of nylon and 20-30 parts of toughening agent A. The backing layer comprises, by weight, 60-80 parts of nylon and 20-30 parts of toughening agent B. The toughening agent A is prepared as follows: 15-20 parts by mass of filler C and 0.5-1 parts by mass of silane coupling agent are added to an ethanol aqueous solution with a mass fraction of 5-10%, ball-milled, separated and dried to obtain a solid phase, the solid phase is added to 1-2 parts of molten polyurethane, 0.1-0.2 parts by mass of plasticizer, stirred thoroughly, cooled, pulverized and then immersed in an ethanol solution of alginate, fully wetted and separated, added to an ethanol solution of calcium chloride, and then separated and dried to obtain toughening agent A; The toughening agent B is prepared as follows: 15-20 parts by weight of silicone rubber particles and 0.2-1 parts by weight of activator are added to water and ball-milled. Then, 5-10 parts by weight of filler D and 0.5-1 parts by weight of silane coupling agent are added and ball-milled again. After dehydration, the mixture is added to an ethanol solution of 30-50 parts by weight of adipic acid. Then, 0.01-0.1 parts by weight of dicyclohexylcarbodiimide and 0.1-0.3 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 60-80°C for 6-8 hours. The solid is separated, washed, and dried. Finally, 0.1-0.3 parts by weight of stearate are added to obtain toughening agent B.

[0006] The toothed layer serves as the locking surface for fastening, with serrated protrusions and grooves, while the backing layer is the smooth part on the back of the cable tie. Cable ties often break at low temperatures at the location opposite the buckle after binding, where tensile stress is concentrated. The backing layer surface cracks and breaks under tensile stress, while the inner surface is under compressive stress, making fracture less likely. Improving the toughness of the cable tie can reduce the impact of tensile stress. Common methods include adding toughening materials, changing the conformation and molecular weight of nylon, and altering the stress distribution. This design is based on these principles, dividing the cable tie into a toothed layer and a backing layer in the thickness direction. The backing layer's toughness is mainly improved by adding silicone rubber, while the toothed layer's toughness is mainly improved by polyurethane while maintaining strength. The main substrate of both the toothed layer and the backing layer is nylon, with good compatibility at the interface, which acts as a stress buffer, reducing tensile stress on the backing layer surface. Given the generally poor compatibility of silicone rubber and polyurethane with nylon, this design modifies the silicone rubber and polyurethane to improve compatibility. In the tooth layer, filler C was modified and added to polyurethane, pulverized, and then coated with alginic acid, which improved the strength, toughness, and compatibility of polyurethane with nylon. In the backing layer, silicone rubber was activated and surface modified together with filler D. Activating silicone rubber can improve its affinity with filler D, allowing the two to disperse and adhere better. Subsequently, adipic acid can be adsorbed on the surface in an ethanol solution of adipic acid. Dicyclohexylcarbodiimide mainly plays the role of activating carboxyl groups, while elemental sulfur is mainly used to improve the crosslinking degree of silicone rubber and improve toughness.

[0007] Preferably, the nylon is nylon 66.

[0008] Preferably, the filler C is one or more of silicon dioxide powder, titanium dioxide powder, aluminum oxide powder, zinc oxide powder, and magnesium oxide powder.

[0009] Preferably, in the preparation method of toughening agent A, the silane coupling agent is KH-550; the polyurethane in the molten polyurethane is a polyether-type polyurethane; and the plasticizer is dimethylamide.

[0010] Preferably, in the preparation method of toughening agent A, the mass percentage of alginic acid in the ethanol solution of alginic acid is 0.5-1%, and the mass percentage of ethanol is 5-10%.

[0011] Preferably, the activator is citric acid or acetic acid.

[0012] Preferably, in the preparation method of toughening agent B, the silane coupling agent is KH-550; and the stearate is one of zinc stearate, calcium stearate, and magnesium stearate.

[0013] Preferably, in the adipic acid ethanol solution, the mass percentage of adipic acid is 2-3% and the mass percentage of ethanol is 5-10%.

[0014] Preferably, filler D is one or more of silica powder, titanium dioxide powder, aluminum oxide powder, zinc oxide powder, and magnesium oxide powder.

[0015] This solution also proposes a production process for low-temperature resistant cable ties, including the following steps: preparing the tooth layer component, melt injection molding, then preparing the back layer component, melt injection molding, and cooling to obtain the low-temperature resistant cable tie.

[0016] As a preferred method, the tooth layer component is prepared, and the tooth layer is melt-injected at 220-250°C. Then, the backing layer component is prepared at 200-230°C and melt-injected at 200-230°C. The backing layer is then cooled to room temperature at 5-10°C / s to obtain a low-temperature resistant cable tie.

[0017] Compared with existing technologies, this solution has the following advantages: 1. A double-layer cable tie was designed to better address the problem of tensile stress concentration in the bottom layer causing breakage during low-temperature use. The interface also has a stress buffering effect, and the resulting low-temperature resistant cable tie can still be used at -70℃.

[0018] 2. A specially formulated toughening agent is developed to address the stress characteristics of different layers, which can better cope with the crystallization and embrittlement of nylon components during low-temperature processes. It has good compatibility with nylon and improves the low-temperature resistance of cable ties. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 A low-temperature resistant cable tie includes a tooth layer and a back layer with a thickness ratio of 1:1. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the back layer. The tooth layer is composed of 75 parts by weight of nylon 66 and 25 parts by weight of toughening agent A. The back layer is composed of 70 parts by weight of nylon 66 and 25 parts by weight of toughening agent B. The toughening agent A is prepared as follows: 5 parts by mass of silica powder, 5 parts by mass of titanium dioxide powder, 5 parts by mass of alumina powder, and 0.8 parts by mass of KH-550 silane coupling agent are added to an 8% (w / w) ethanol aqueous solution. The mixture is ball-milled, separated, and dried to obtain a solid phase. This solid phase is then added to 1.5 parts by mass of molten polyether polyurethane WHT1195 and 0.15 parts by mass of dimethylamide. The mixture is stirred thoroughly, cooled, pulverized, and then immersed in an ethanol solution of alginate. After thorough wetting, the mixture is separated and added to an ethanol solution of calcium chloride. Subsequently, the mixture is separated and dried to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.8%, and the mass percentage of ethanol is 8%. The preparation method of toughening agent B is as follows: 18 parts by weight of silicone rubber particles and 0.6 parts by weight of citric acid are added to water and ball-milled. Then, 5 parts by weight of silica powder, 5 parts by weight of titanium dioxide powder, 5 parts by weight of alumina powder, and 0.8 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to 40 parts by weight of an ethanol solution of adipic acid. Then, 0.5 parts by weight of dicyclohexylcarbodiimide and 0.2 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 70°C for 7 hours. The solid is separated, washed, and dried. Finally, 0.2 parts by weight of zinc stearate are added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.5% and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: the tooth layer components are prepared, mixed, and then melt-injected at 240°C; the back layer components are then prepared, mixed, and then melt-injected at 220°C; after cooling, the low-temperature resistant cable ties are obtained.

[0021] Example 2 A low-temperature resistant cable tie includes a tooth layer and a backing layer with a thickness ratio of 1:1.5. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the backing layer. The tooth layer is composed of 70 parts by weight of nylon 66 and 20 parts by weight of toughening agent A. The backing layer is composed of 60 parts by weight of nylon 66 and 20 parts by weight of toughening agent B. The toughening agent A is prepared as follows: 5 parts by mass of silica powder, 5 parts by mass of alumina powder, 5 parts by mass of zinc oxide powder, 5 parts by mass of magnesium oxide powder, and 0.5 parts by mass of KH-550 silane coupling agent are added to a 7% (w / w) ethanol aqueous solution. The mixture is ball-milled, separated, and dried to obtain a solid phase. This solid phase is then added to 1 part of molten polyurethane WHT1195 and 0.1 part of dimethylamide. The mixture is stirred thoroughly, cooled, pulverized, and then immersed in an ethanol solution of alginate. After thorough wetting, the mixture is separated and added to an ethanol solution of calcium chloride. Subsequently, the mixture is separated and dried to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.7%, and the mass percentage of ethanol is 7%. The preparation method of toughening agent B is as follows: 15-20 parts by weight of silicone rubber particles and 0.4 parts by weight of citric acid are added to water and ball-milled. Then, 5 parts by weight of silica powder, 5 parts by weight of titanium dioxide powder, 5 parts by weight of zinc oxide powder, and 0.6 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to an ethanol solution of 35 parts by weight of adipic acid. Then, 0.03 parts by weight of dicyclohexylcarbodiimide and 0.15 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 65°C for 6 hours. The solid is separated, washed, and then 0.2 parts by weight of calcium stearate is added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.3% and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: the tooth layer components are prepared, mixed, and then melt-injected at 240°C; the back layer components are then prepared, mixed, and then melt-injected at 220°C; after cooling, the low-temperature resistant cable ties are obtained.

[0022] Example 3 A low-temperature resistant cable tie includes a tooth layer and a backing layer with a thickness ratio of 1:2. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the backing layer. The tooth layer is composed of 80 parts by weight of nylon 66 and 30 parts by weight of toughening agent A. The backing layer is composed of 80 parts by weight of nylon 66 and 30 parts by weight of toughening agent B. The toughening agent A is prepared as follows: 6 parts by mass of silica powder, 6 parts by mass of titanium dioxide powder, 6 parts by mass of alumina powder, and 0.9 parts by mass of KH-550 silane coupling agent are added to a 9% (w / w) ethanol aqueous solution. The mixture is ball-milled, separated, and dried to obtain a solid phase. This solid phase is then added to 2 parts of molten polyurethane WHT1195 and 0.2 parts by mass of dimethylamide. The mixture is stirred thoroughly, cooled, pulverized, and then immersed in an ethanol solution of alginate. After thorough wetting, the mixture is separated and added to an ethanol solution of calcium chloride. Subsequently, the mixture is separated and dried to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.9%, and the mass percentage of ethanol is 8%. The preparation method of toughening agent B is as follows: 19 parts by weight of silicone rubber particles and 0.9 parts by weight of citric acid are added to water and ball-milled. Then, 9 parts by weight of silica powder, 8 parts by weight of titanium dioxide powder, and 0.9 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to an ethanol solution of 45 parts by weight of adipic acid. Then, 0.1 parts by weight of dicyclohexylcarbodiimide and 0.3 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 80°C for 8 hours. The solid is separated, washed, and then 0.3 parts by weight of zinc stearate is added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 3% and the mass percentage of ethanol is 9%. Low-temperature resistant cable ties are prepared by the following process: the tooth layer components are prepared, mixed, and then melt-injected at 240°C; the back layer components are then prepared, mixed, and then melt-injected at 220°C; after cooling, the low-temperature resistant cable ties are obtained.

[0023] Example 4 A low-temperature resistant cable tie includes a tooth layer and a backing layer with a thickness ratio of 1:1.5. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the backing layer. The tooth layer is composed of 75 parts by weight of nylon 66 and 25 parts by weight of toughening agent A. The backing layer is composed of 75 parts by weight of nylon 66 and 25 parts by weight of toughening agent B. The toughening agent A is prepared as follows: 5 parts by mass of silica powder, 8 parts by mass of zinc oxide powder, 5 parts by mass of magnesium oxide powder, and 0.6 parts by mass of KH-550 silane coupling agent are added to a 7% (w / w) ethanol aqueous solution. The mixture is ball-milled, separated, and dried to obtain a solid phase. This solid phase is then added to 1.5 parts by mass of molten polyurethane WHT1195 and 0.16 parts by mass of dimethylamide. The mixture is stirred thoroughly, cooled, pulverized, and then immersed in an ethanol solution of alginate. After thorough wetting, the mixture is separated and added to an ethanol solution of calcium chloride. The mixture is then separated and dried to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.8%, and the mass percentage of ethanol is 8%. The preparation method of toughening agent B is as follows: 15-20 parts by weight of silicone rubber particles and 0.8 parts by weight of citric acid are added to water and ball-milled. Then, 5 parts by weight of silica powder, 5 parts by weight of titanium dioxide powder, 5 parts by weight of zinc oxide powder, and 0.8 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to an ethanol solution of 38 parts by weight of adipic acid. Then, 0.06 parts by weight of dicyclohexylcarbodiimide and 0.18 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 65°C for 8 hours. The solid is separated, washed, and then 0.16 parts by weight of magnesium stearate is added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.6% and the mass percentage of ethanol is 7%. Low-temperature resistant cable ties are prepared by the following process: the tooth layer components are prepared, mixed, and then melt-injected at 240°C; the back layer components are then prepared, mixed, and then melt-injected at 220°C; after cooling, the low-temperature resistant cable ties are obtained.

[0024] Comparative Example 1 Commercially available cable ties, made of nylon 66 base material.

[0025] Comparative Example 2 The difference from Example 1 is that no layered design was used, and it was prepared using only the tooth layer component: A low-temperature resistant cable tie comprises: 75 parts by weight of nylon 66 and 25 parts by weight of toughening agent A; The preparation method of toughening agent A is as follows: 5 parts by mass of silica powder, 5 parts by mass of titanium dioxide powder, 5 parts by mass of alumina powder, and 0.8 parts by mass of KH-550 silane coupling agent are added to an 8% (w / w) ethanol aqueous solution, ball-milled, separated, and dried to obtain a solid phase. The solid phase is then added to 1.5 parts by mass of molten polyurethane WHT1195 and 0.15 parts by mass of dimethylamide. After thorough stirring and cooling, the mixture is pulverized and immersed in an ethanol solution of alginate. After thorough wetting, it is separated and added to an ethanol solution of calcium chloride, followed by separation and drying to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.8%, and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: the components are prepared, mixed, melt-injected at 240°C, and cooled to obtain low-temperature resistant cable ties.

[0026] Comparative Example 3 The difference from Example 1 is that no layered design was used, and it was prepared using only the bottom layer component: A low-temperature resistant cable tie comprises: 70 parts by weight of nylon 66 and 25 parts by weight of toughening agent B; The preparation method of toughening agent B is as follows: 18 parts by weight of silicone rubber particles and 0.6 parts by weight of citric acid are added to water and ball-milled. Then, 5 parts by weight of silica powder, 5 parts by weight of titanium dioxide powder, 5 parts by weight of alumina powder, and 0.8 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to 40 parts by weight of an ethanol solution of adipic acid. Then, 0.5 parts by weight of dicyclohexylcarbodiimide and 0.2 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 70°C for 7 hours. The solid is separated, washed, and dried. Finally, 0.2 parts by weight of zinc stearate are added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.5% and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: the components are prepared, mixed, melt-injected at 220°C, and cooled to obtain low-temperature resistant cable ties.

[0027] Comparative Example 4 The difference from Example 1 is that the preparation process is completed in a single injection molding step, without a layered design: A low-temperature resistant cable tie, comprising: material group 1 consisting of 75 parts by weight of nylon 66 and 25 parts by weight of toughening agent A; and material group 2 consisting of 70 parts by weight of nylon 66 and 25 parts by weight of toughening agent A; The preparation method of toughening agent A is as follows: 5 parts by mass of silica powder, 5 parts by mass of titanium dioxide powder, 5 parts by mass of alumina powder, and 0.8 parts by mass of KH-550 silane coupling agent are added to an 8% (w / w) ethanol aqueous solution, ball-milled, separated, and dried to obtain a solid phase. The solid phase is then added to 1.5 parts by mass of molten polyurethane WHT1195 and 0.15 parts by mass of dimethylamide. After thorough stirring and cooling, the mixture is pulverized and immersed in an ethanol solution of alginate. After thorough wetting, it is separated and added to an ethanol solution of calcium chloride, followed by separation and drying to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.8%, and the mass percentage of ethanol is 8%. The preparation method of toughening agent B is as follows: 18 parts by weight of silicone rubber particles and 0.6 parts by weight of citric acid are added to water and ball-milled. Then, 5 parts by weight of silica powder, 5 parts by weight of titanium dioxide powder, 5 parts by weight of alumina powder, and 0.8 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to 40 parts by weight of an ethanol solution of adipic acid. Then, 0.5 parts by weight of dicyclohexylcarbodiimide and 0.2 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 70°C for 7 hours. The solid is separated, washed, and dried. Finally, 0.2 parts by weight of zinc stearate are added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.5% and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: Mix material group 1 and material group 2 in a 1:1 ratio, melt and inject at 240°C, and obtain low-temperature resistant cable ties after cooling.

[0028] Comparative Example 5 The difference from Example 1 is that the backing thickness is insufficient: A low-temperature resistant cable tie includes a tooth layer and a backing layer with a thickness ratio of 1:0.5. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the backing layer. The tooth layer is composed of 75 parts by weight of nylon 66 and 25 parts by weight of toughening agent A. The backing layer is composed of 70 parts by weight of nylon 66 and 25 parts by weight of toughening agent B. The preparation method of toughening agent A is as follows: 5 parts by mass of silica powder, 5 parts by mass of titanium dioxide powder, 5 parts by mass of alumina powder, and 0.8 parts by mass of KH-550 silane coupling agent are added to an 8% (w / w) ethanol aqueous solution, ball-milled, separated, and dried to obtain a solid phase. The solid phase is then added to 1.5 parts by mass of molten polyurethane WHT1195 and 0.15 parts by mass of dimethylamide. After thorough stirring and cooling, the mixture is pulverized and immersed in an ethanol solution of alginate. After thorough wetting, it is separated and added to an ethanol solution of calcium chloride, followed by separation and drying to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.8%, and the mass percentage of ethanol is 8%. The preparation method of toughening agent B is as follows: 18 parts by weight of silicone rubber particles and 0.6 parts by weight of citric acid are added to water and ball-milled. Then, 5 parts by weight of silica powder, 5 parts by weight of titanium dioxide powder, 5 parts by weight of alumina powder, and 0.8 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to 40 parts by weight of an ethanol solution of adipic acid. Then, 0.5 parts by weight of dicyclohexylcarbodiimide and 0.2 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 70°C for 7 hours. The solid is separated, washed, and dried. Finally, 0.2 parts by weight of zinc stearate are added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.5% and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: the tooth layer components are prepared, mixed, and then melt-injected at 240°C; the back layer components are then prepared, mixed, and then melt-injected at 220°C; after cooling, the low-temperature resistant cable ties are obtained.

[0029] Comparative Example 6 The difference from Example 1 is that the preparation of toughening agent A and toughening agent B did not involve any modification processes for raw materials. A low-temperature resistant cable tie includes a tooth layer and a back layer with a thickness ratio of 1:1. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the back layer. The tooth layer is composed of 75 parts by weight of nylon 66 and 25 parts by weight of toughening agent A. The back layer is composed of 70 parts by weight of nylon 66 and 25 parts by weight of toughening agent B. The toughening agent A is prepared as follows: 5 parts by mass of silica powder, 5 parts by mass of titanium dioxide powder, and 5 parts by mass of alumina powder are added to an 8% (w / w) aqueous ethanol solution, ball-milled, separated, and dried to obtain a solid phase. The solid phase is then added to 1.5 parts of molten polyurethane WHT1195 and 0.15 parts of dimethylamide, stirred thoroughly, cooled, and subsequently separated and dried to obtain toughening agent A. In the alginic acid ethanol solution, the mass percentage of alginic acid is 0.8%, and the mass percentage of ethanol is 8%. The preparation method of toughening agent B is as follows: 18 parts by weight of silicone rubber particles are added to water and ball-milled. Then, 5 parts of silica powder, 5 parts of titanium dioxide powder, and 5 parts of alumina powder are added, and ball milling continues. After dehydration, the mixture is added to 40 parts of an ethanol solution of adipic acid. Then, 0.5 parts of dicyclohexylcarbodiimide and 0.2 parts of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 70°C for 7 hours. The solid is separated, washed, and dried. Finally, 0.2 parts of zinc stearate are added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.5%, and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: the tooth layer components are prepared, mixed, and then melt-injected at 240°C; the back layer components are then prepared, mixed, and then melt-injected at 220°C; after cooling, the low-temperature resistant cable ties are obtained.

[0030] Comparative Example 7 The difference from Example 1 lies in the different proportions of the components in the tooth layer and the underlying layer: A low-temperature resistant cable tie includes a tooth layer and a back layer with a thickness ratio of 1:1. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the back layer. The tooth layer is composed of 90 parts by weight of nylon 66 and 25 parts by weight of toughening agent A. The back layer is composed of 90 parts by weight of nylon 66 and 25 parts by weight of toughening agent B. The toughening agent A is prepared as follows: 5 parts by mass of silica powder, 5 parts by mass of titanium dioxide powder, 5 parts by mass of alumina powder, and 0.8 parts by mass of KH-550 silane coupling agent are added to an 8% (w / w) ethanol aqueous solution. The mixture is ball-milled, separated, and dried to obtain a solid phase. This solid phase is then added to 1.5 parts by mass of molten polyether polyurethane WHT1195 and 0.15 parts by mass of dimethylamide. The mixture is stirred thoroughly, cooled, pulverized, and then immersed in an ethanol solution of alginate. After thorough wetting, the mixture is separated and added to an ethanol solution of calcium chloride. Subsequently, the mixture is separated and dried to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.8%, and the mass percentage of ethanol is 8%. The preparation method of toughening agent B is as follows: 18 parts by weight of silicone rubber particles and 0.6 parts by weight of citric acid are added to water and ball-milled. Then, 5 parts by weight of silica powder, 5 parts by weight of titanium dioxide powder, 5 parts by weight of alumina powder, and 0.8 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to 40 parts by weight of an ethanol solution of adipic acid. Then, 0.5 parts by weight of dicyclohexylcarbodiimide and 0.2 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 70°C for 7 hours. The solid is separated, washed, and dried. Finally, 0.2 parts by weight of zinc stearate are added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.5% and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: the tooth layer components are prepared, mixed, and then melt-injected at 240°C; the back layer components are then prepared, mixed, and then melt-injected at 220°C; after cooling, the low-temperature resistant cable ties are obtained.

[0031] Comparative Example 8 The difference from Example 1 lies in the different proportions of the components in the tooth layer and the underlying layer: A low-temperature resistant cable tie includes a tooth layer and a back layer with a thickness ratio of 1:1. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the back layer. The tooth layer is composed of 75 parts by weight of nylon 66 and 35 parts by weight of toughening agent A. The back layer is composed of 75 parts by weight of nylon 66 and 35 parts by weight of toughening agent B. The toughening agent A is prepared as follows: 5 parts by mass of silica powder, 5 parts by mass of titanium dioxide powder, 5 parts by mass of alumina powder, and 0.8 parts by mass of KH-550 silane coupling agent are added to an 8% (w / w) ethanol aqueous solution. The mixture is ball-milled, separated, and dried to obtain a solid phase. This solid phase is then added to 1.5 parts by mass of molten polyether polyurethane WHT1195 and 0.15 parts by mass of dimethylamide. The mixture is stirred thoroughly, cooled, pulverized, and then immersed in an ethanol solution of alginate. After thorough wetting, the mixture is separated and added to an ethanol solution of calcium chloride. Subsequently, the mixture is separated and dried to obtain toughening agent A. In the ethanol solution of alginate, the mass percentage of alginate is 0.8%, and the mass percentage of ethanol is 8%. The preparation method of toughening agent B is as follows: 18 parts by weight of silicone rubber particles and 0.6 parts by weight of citric acid are added to water and ball-milled. Then, 5 parts by weight of silica powder, 5 parts by weight of titanium dioxide powder, 5 parts by weight of alumina powder, and 0.8 parts by weight of KH-550 silane coupling agent are added and ball-milling continues. After dehydration, the mixture is added to 40 parts by weight of an ethanol solution of adipic acid. Then, 0.5 parts by weight of dicyclohexylcarbodiimide and 0.2 parts by weight of elemental sulfur are added and dispersed. The mixture is then soaked in an oxygen-free environment at 70°C for 7 hours. The solid is separated, washed, and dried. Finally, 0.2 parts by weight of zinc stearate are added to obtain toughening agent B. In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2.5% and the mass percentage of ethanol is 8%. Low-temperature resistant cable ties are prepared by the following process: the tooth layer components are prepared, mixed, and then melt-injected at 240°C; the back layer components are then prepared, mixed, and then melt-injected at 220°C; after cooling, the low-temperature resistant cable ties are obtained.

[0032] Performance test sample specifications: 3.6*150mm; 1. Mechanical property testing: After static treatment at different temperatures for 24 hours, tensile strength and elongation at break are tested at room temperature. The tensile strength is required to be ≥180N and the elongation at break is required to be ≥15%. 2. Under the same tight binding condition, test the binding effect for 90 days at a temperature of -70℃.

[0033] As shown in Table 1: Table 1 The above results show that the low-temperature resistant cable ties prepared in Examples 1 to 4 have better performance characteristics than those prepared in Comparative Examples 1 to 8. The higher tensile strength of Examples 1 to 4 after static treatment at -20℃ compared to room temperature is due to the higher degree of crystallization caused by the low temperature, which reduces elongation at break and increases tensile strength. However, as the temperature further decreases, the degree of crystallization increases, the self-lubricating effect of nylon decreases, and the tensile strength and elongation at break both decrease.

[0034] Comparative Example 1 uses conventional cable ties, and it is evident that Example 1 has significant advantages over Comparative Example 1, which is attributed to the component and structural design of Example 1.

[0035] The difference between Comparative Examples 2 and 3 and Comparative Examples 1 is that only the dental layer component or the backing layer component was injection molded to produce the low-temperature resistant cable tie. The dental layer component was designed to ensure strength, while the backing layer component had better toughness. Combining Example 1 and Comparative Example 1, Comparative Example 3 achieved excellent elongation at break and did not break within 90 days at -70°C, although it loosened, and its tensile strength was lower than the target value. Comparative Example 2 sacrificed some elongation at break but improved tensile strength. Therefore, the design structure of Example 1 is more advantageous, thanks to the synergistic effect of the toughening agents in both the dental layer and backing layer components. Furthermore, during service, the stress is better distributed at the contact area between the dental layer and backing layer, improving service life. Similarly, Comparative Example 4 also performed worse than Example 1 for similar reasons.

[0036] The difference between Comparative Example 5 and Example 1 is that the backing layer is not thick enough, which makes the backing layer less able to withstand tensile stress during service, resulting in cracks.

[0037] The difference between Comparative Example 6 and Example 1 is that no modification process was performed during the preparation of toughening agent A and toughening agent B. This resulted in poorer compatibility among the components, leading to a decrease in overall performance.

[0038] Comparative Example 7 had an excessive amount of nylon component, which led to a decrease in both tensile strength and elongation at break.

[0039] Comparative Example 8 showed that the nylon component was too small, resulting in reduced tensile strength at low temperatures and a risk of breakage.

[0040] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein.

Claims

1. A low-temperature resistant cable tie, characterized in that, It comprises a tooth layer and a backing layer with a thickness ratio of 1:1-2. The tooth layer includes tooth particles and a tooth base, and the tooth base is connected to the backing layer. The tooth layer is composed of 70-80 parts by weight of nylon and 20-30 parts by weight of toughening agent A. The backing layer is composed of 60-80 parts by weight of nylon and 20-30 parts by weight of toughening agent B. The toughening agent A is prepared as follows: 15-20 parts by mass of filler C and 0.5-1 parts by mass of silane coupling agent are added to an ethanol aqueous solution with a mass fraction of 5-10%, ball-milled, separated and dried to obtain a solid phase, the solid phase is added to 1-2 parts of molten polyurethane, 0.1-0.2 parts by mass of plasticizer, stirred thoroughly, cooled, pulverized and then immersed in an ethanol solution of alginate, fully wetted and separated, added to an ethanol solution of calcium chloride, and then separated and dried to obtain toughening agent A; The toughening agent B is prepared as follows: 15-20 parts by weight of silicone rubber particles and 0.2-1 parts by weight of activator are added to water and ball-milled. Then, 5-10 parts by weight of filler D and 0.5-1 parts by weight of silane coupling agent are added and ball-milled again. After dehydration, the mixture is added to an ethanol solution of 30-50 parts by weight of adipic acid. Then, 0.01-0.1 parts by weight of dicyclohexylcarbodiimide and 0.1-0.3 parts by weight of elemental sulfur are added and dispersed. The mixture is soaked at 60-80℃ for 6-8 hours, the solid is separated, washed, dried, and then 0.1-0.3 parts by weight of stearate are added to obtain toughening agent B.

2. The low-temperature resistant cable tie as described in claim 1, characterized in that, The filler C is one or more of the following: silicon dioxide powder, titanium dioxide powder, aluminum oxide powder, zinc oxide powder, and magnesium oxide powder.

3. The low-temperature resistant cable tie as described in claim 1, characterized in that, In the preparation method of toughening agent A, the silane coupling agent is KH-550; the polyurethane in the molten polyurethane is a polyether-type polyurethane; and the plasticizer is dimethylamide.

4. The low-temperature resistant cable tie as described in claim 1, characterized in that, In the preparation method of toughening agent A, the mass percentage of alginic acid in the ethanol solution is 0.5-1%, and the mass percentage of ethanol is 5-10%.

5. The low-temperature resistant cable tie as described in claim 1, characterized in that, The activator is citric acid or acetic acid.

6. The low-temperature resistant cable tie as described in claim 1, characterized in that, In the preparation method of toughening agent B, the silane coupling agent is KH-550; the stearate is one of zinc stearate, calcium stearate, and magnesium stearate.

7. The low-temperature resistant cable tie as described in claim 1, characterized in that, In the ethanol solution of adipic acid, the mass percentage of adipic acid is 2-3% and the mass percentage of ethanol is 5-10%.

8. The low-temperature resistant cable tie as described in claim 1, characterized in that, The filler D is one or more of the following: silica powder, titanium dioxide powder, alumina powder, zinc oxide powder, and magnesium oxide powder.

9. A manufacturing process for low-temperature resistant cable ties as described in any one of claims 1-8, comprising the following steps: The tooth layer component is prepared and melt-injected, followed by the preparation of the back layer component, melt-injected, and cooled to obtain a low-temperature resistant cable tie.

10. The production process of the low-temperature resistant cable tie as described in claim 9, characterized in that, Follow these steps: Prepare the tooth layer component, melt and inject the tooth layer at 220-250℃, then maintain at 200-230℃, prepare the backing layer component, melt and inject the backing layer at 200-230℃, and cool to room temperature at 5-10℃ / s to obtain a low-temperature resistant cable tie.

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