Cold-resistant environment-friendly elastomer sheath material

Abstract

The invention discloses a cold-resistant environment-friendly elastomer sheath material, and relates to the technical field of sheath materials. The thermoplastic polyurethane elastomer is prepared from the following raw materials in parts by weight: 70 to 80 parts of aliphatic TPU, 10 to 20 parts of epoxidized soybean oil, 5 to 10 parts of filler, 0.5 to 1 part of triphenyl phosphate, 0.8 to 1.6 parts of antioxidant, 0.5 to 1 part of ultraviolet light absorber and 0.3 to 1.2 parts of calcium stearate. The sheath material disclosed by the invention has excellent weather resistance, cold resistance and environmental protection performance, the weather resistance of the material is improved and the damage of ultraviolet rays to the material is prevented by matching with the use of the ultraviolet light absorber, meanwhile, the sheath material has high tensile strength in a low-temperature environment, the material can bear relatively large tensile force without being broken, and in actual use, the sheath material has good weather resistance, cold resistance and environmental protection performance. And the stability of the structure can be kept no matter whether the cable is subjected to the tension of an internal cable or the external drawing force.

Description

Technical Field

[0001] The invention relates to the technical field of sheath materials, in particular to a cold-resistant and environment-friendly elastomer sheath material. Background Art

[0002] With the continuous advancement of electrical and electronic technology, the performance requirements for products such as wires and cables are getting higher and higher. As an important component of wires and cables, elastomer sheath materials need to have good insulation properties, mechanical strength, aging resistance and flame retardancy to ensure the safe and reliable operation of wires and cables in various complex environments. At the same time, with the trend of miniaturization and lightweight of electronic equipment, higher requirements are also placed on the flexibility and processability of sheath materials.

[0003] At present, some existing elastomeric sheath materials perform well within a certain temperature range, but under extremely cold conditions, some elastomers may become brittle, causing the sheath to easily break, reducing the protective effect on the internal cables. In addition, the elastomeric sheath materials may contain harmful substances such as heavy metals and phthalates, which may cause harm to the environment and human health during production, use and disposal, and are difficult to degrade naturally. Summary of the invention

[0004] The purpose of the present invention is to provide a cold-resistant and environmentally friendly elastomeric sheath material to solve the problems raised in the above-mentioned background technology that under extremely cold conditions, some elastomers may become brittle, causing the sheath to easily break, reducing the protective effect on the internal cables, and the elastomeric sheath material may contain harmful substances such as heavy metals and phthalates, which may cause harm to the environment and human health during production, use and disposal, and is difficult to degrade naturally.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a cold-resistant and environmentally friendly elastomer sheath material, comprising the following raw materials in parts by weight: 70-80 parts by weight of aliphatic TPU, 10-20 parts by weight of epoxy soybean oil, 5-10 parts by weight of filler, 0.5-1 parts by weight of triphenyl phosphite, 0.8-1.6 parts by weight of antioxidant, 0.5-1 parts by weight of ultraviolet absorber and 0.3-1.2 parts by weight of calcium stearate.

[0006] Preferably, the filler is any one of talc and calcium carbonate.

[0007] Preferably, the antioxidant is any one of antioxidant 1010 and antioxidant 1076.

[0008] Preferably, the ultraviolet absorber is any one of 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorobenzotriazole, 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxybenzophenone.

[0009] Preferably, the method for preparing the cold-resistant and environmentally friendly elastomer sheath material comprises the following steps:

[0010] S1. Accurately weigh aliphatic TPU, epoxy soybean oil, filler, triphenyl phosphite, antioxidant, ultraviolet absorber and calcium stearate, and add aliphatic TPU, epoxy soybean oil and filler into a premixer in sequence and stir and mix thoroughly;

[0011] S2. Under stirring, add triphenyl phosphite, antioxidant 1010 and ultraviolet absorber into the stirrer in sequence, continue stirring for 40-50 minutes, add calcium stearate after fully mixing and continue stirring for 15-20 minutes, and take out the raw materials after they are completely mixed;

[0012] S3, after the mixing is completed, the mixed material is added to the extruder, and the extruder is started to melt the material and extrude it into a continuous strip or tubular sheath material;

[0013] S4, after the extrusion is completed, the extruded sheath material is cooled, shaped and collected;

[0014] S5. The collected sheath materials are tested and packaged and stored after they are qualified.

[0015] Preferably, in step S4, the cooling and shaping process is as follows:

[0016] S41, the sheath material extruded by the extruder enters the cooling water tank through the guide device;

[0017] S42, the jacket material moves with the water flow in the cooling water tank, continuously exchanges heat with the cooling water, and gradually cools and sets;

[0018] S43, after being cooled in the water tank, the jacket material is introduced into a bellows, and high-speed airflow is used to further cool the jacket material and dry the moisture on the surface of the jacket material.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, by adding aliphatic TPU and epoxy soybean oil, the flexibility and cold resistance of the material can be improved, so that the sheath material has excellent weather resistance, cold resistance and environmental protection performance. The use of ultraviolet absorber improves the weather resistance of the material and prevents ultraviolet damage to the material. At the same time, the sheath material has high tensile strength in low temperature environment, and the material can withstand large tensile force without breaking. In actual use, whether it is subjected to the tension of the internal cable or the external tensile force, the stability of the structure can be maintained.

[0021] 2. In the present invention, the sheath material has high tear strength, which can effectively resist the tearing effect of external force, prevent the sheath from rapidly expanding into a large crack when punctured or scratched by a sharp object, and can better protect the internal products and reduce the safety hazards and economic losses caused by damage to the sheath. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention will be further described below in conjunction with the embodiments.

[0024] Example 1

[0025] The present embodiment provides a cold-resistant and environmentally friendly elastomeric sheath material, comprising the following raw materials in parts by weight: 70 parts by weight of aliphatic TPU, 10 parts by weight of epoxy soybean oil, 5 parts by weight of filler, 0.5 parts by weight of triphenyl phosphite, 0.8 parts by weight of antioxidant, 0.5 parts by weight of ultraviolet absorber and 0.3 parts by weight of calcium stearate.

[0026] The filler is talcum powder, the antioxidant is antioxidant 1010, and the external radiation absorber is 2-(2'-hydroxy-3', 5'-di-tert-phenyl)-5-chlorobenzotriazole.

[0027] The preparation method of the cold-resistant and environmentally friendly elastomer sheath material comprises the following steps:

[0028] Step 1: Accurately weigh aliphatic TPU, epoxy soybean oil, filler, triphenyl phosphite, antioxidant, ultraviolet absorber and calcium stearate, and add aliphatic TPU, epoxy soybean oil and filler into a premixer in sequence and stir and mix them thoroughly;

[0029] Step 2: Add triphenyl phosphite, antioxidant 1010 and ultraviolet absorber into the stirrer in sequence under stirring, continue stirring for 40-50 minutes, add calcium stearate after fully mixing and continue stirring for 15-20 minutes, and take out the raw materials after they are completely mixed;

[0030] Step 3: After the mixing is completed, the mixed material is added into the extruder, and the extruder is started to melt the material and extrude it into a continuous strip or tubular sheath material;

[0031] Step 4: After extrusion is completed, the extruded sheath material is cooled, shaped and collected;

[0032] The cooling and shaping process is as follows: the sheath material extruded by the extruder enters the cooling water tank through the guide device, and then the sheath material moves with the water flow in the cooling water tank, continuously exchanges heat with the cooling water, and gradually cools and shapes. After cooling in the water tank, the sheath material is introduced into the bellows, and the high-speed airflow is used to further cool the sheath material and dry the moisture on the surface of the sheath material;

[0033] Step 5: Test the collected sheath materials and package and store them after they pass the test.

[0034] Example 2

[0035] The present embodiment provides a cold-resistant and environmentally friendly elastomeric sheath material, comprising the following raw materials in parts by weight: 75 parts by weight of aliphatic TPU, 15 parts by weight of epoxy soybean oil, 8 parts by weight of filler, 0.8 parts by weight of triphenyl phosphite, 1.2 parts by weight of antioxidant, 0.8 parts by weight of ultraviolet absorber and 0.7 parts by weight of calcium stearate.

[0036] The filler is talcum powder, the antioxidant is antioxidant 1010, and the external radiation absorber is 2-(2'-hydroxy-3', 5'-di-tert-phenyl)-5-chlorobenzotriazole.

[0037] The preparation method of the cold-resistant and environmentally friendly elastomer sheath material comprises the following steps:

[0038] Step 1: Accurately weigh aliphatic TPU, epoxy soybean oil, filler, triphenyl phosphite, antioxidant, ultraviolet absorber and calcium stearate, and add aliphatic TPU, epoxy soybean oil and filler into a premixer in sequence and stir and mix them thoroughly;

[0039] Step 2: Add triphenyl phosphite, antioxidant 1010 and ultraviolet absorber into the stirrer in sequence under stirring, continue stirring for 40-50 minutes, add calcium stearate after fully mixing and continue stirring for 15-20 minutes, and take out the raw materials after they are completely mixed;

[0040] Step 3: After the mixing is completed, the mixed material is added into the extruder, and the extruder is started to melt the material and extrude it into a continuous strip or tubular sheath material;

[0041] Step 4: After extrusion is completed, the extruded sheath material is cooled, shaped and collected;

[0042] The cooling and shaping process is as follows: the sheath material extruded by the extruder enters the cooling water tank through the guide device, and then the sheath material moves with the water flow in the cooling water tank, continuously exchanges heat with the cooling water, and gradually cools and shapes. After cooling in the water tank, the sheath material is introduced into the bellows, and the high-speed airflow is used to further cool the sheath material and dry the moisture on the surface of the sheath material;

[0043] Step 5: Test the collected sheath materials and package and store them after they pass the test.

[0044] Example 3

[0045] The present embodiment provides a cold-resistant and environmentally friendly elastomeric sheath material, comprising the following raw materials in parts by weight: 80 parts by weight of aliphatic TPU, 20 parts by weight of epoxy soybean oil, 10 parts by weight of filler, 1 part by weight of triphenyl phosphite, 1.6 parts by weight of antioxidant, 1 part by weight of ultraviolet absorber and 1.2 parts by weight of calcium stearate.

[0046] The filler is talcum powder, the antioxidant is antioxidant 1010, and the external radiation absorber is 2-(2'-hydroxy-3', 5'-di-tert-phenyl)-5-chlorobenzotriazole.

[0047] The preparation method of the cold-resistant and environmentally friendly elastomer sheath material comprises the following steps:

[0048] Step 1: Accurately weigh aliphatic TPU, epoxy soybean oil, filler, triphenyl phosphite, antioxidant, ultraviolet absorber and calcium stearate, and add aliphatic TPU, epoxy soybean oil and filler into a premixer in sequence and stir and mix them thoroughly;

[0049] Step 2: Add triphenyl phosphite, antioxidant 1010 and ultraviolet absorber into the stirrer in sequence under stirring, continue stirring for 40-50 minutes, add calcium stearate after fully mixing and continue stirring for 15-20 minutes, and take out the raw materials after they are completely mixed;

[0050] Step 3: After the mixing is completed, the mixed material is added into the extruder, and the extruder is started to melt the material and extrude it into a continuous strip or tubular sheath material;

[0051] Step 4: After extrusion is completed, the extruded sheath material is cooled, shaped and collected;

[0052] The cooling and shaping process is as follows: the sheath material extruded by the extruder enters the cooling water tank through the guide device, and then the sheath material moves with the water flow in the cooling water tank, continuously exchanges heat with the cooling water, and gradually cools and shapes. After cooling in the water tank, the sheath material is introduced into the bellows, and the high-speed airflow is used to further cool the sheath material and dry the moisture on the surface of the sheath material;

[0053] Step 5: Test the collected sheath materials and package and store them after they pass the test.

[0054] Example 4

[0055] The present embodiment provides a cold-resistant and environmentally friendly elastomeric sheath material, comprising the following raw materials in parts by weight: 70 parts by weight of aliphatic TPU, 20 parts by weight of epoxy soybean oil, 5 parts by weight of filler, 0.5 parts by weight of triphenyl phosphite, 1.6 parts by weight of antioxidant, 1 part by weight of ultraviolet absorber and 1.2 parts by weight of calcium stearate.

[0056] The filler is talcum powder, the antioxidant is antioxidant 1010, and the external radiation absorber is 2,4-dihydroxybenzophenone.

[0057] The preparation method of the cold-resistant and environmentally friendly elastomer sheath material comprises the following steps:

[0058] Step 1: Accurately weigh aliphatic TPU, epoxy soybean oil, filler, triphenyl phosphite, antioxidant, ultraviolet absorber and calcium stearate, and add aliphatic TPU, epoxy soybean oil and filler into a premixer in sequence and stir and mix them thoroughly;

[0059] Step 2: Add triphenyl phosphite, antioxidant 1010 and ultraviolet absorber into the stirrer in sequence under stirring, continue stirring for 40-50 minutes, add calcium stearate after fully mixing and continue stirring for 15-20 minutes, and take out the raw materials after they are completely mixed;

[0060] Step 3: After the mixing is completed, the mixed material is added into the extruder, and the extruder is started to melt the material and extrude it into a continuous strip or tubular sheath material;

[0061] Step 4: After extrusion is completed, the extruded sheath material is cooled, shaped and collected;

[0062] The cooling and shaping process is as follows: the sheath material extruded by the extruder enters the cooling water tank through the guide device, and then the sheath material moves with the water flow in the cooling water tank, continuously exchanges heat with the cooling water, and gradually cools and shapes. After cooling in the water tank, the sheath material is introduced into the bellows, and the high-speed airflow is used to further cool the sheath material and dry the moisture on the surface of the sheath material;

[0063] Step 5: Test the collected sheath materials and package and store them after they pass the test.

[0064] Comparative Example 1

[0065] The cold-resistant and environmentally friendly elastomer sheath material provided in this embodiment is substantially the same as that in Embodiment 1, with the main difference being that the aliphatic TPU in the raw material is replaced by polyether TPU.

[0066] Comparative Example 2

[0067] The cold-resistant and environmentally friendly elastomer sheath material provided in this embodiment is substantially the same as that in Embodiment 1, with the main difference being that no ultraviolet absorber is added to the raw material.

[0068] Comparative Example 3

[0069] The cold-resistant and environmentally friendly elastomer sheath material provided in this embodiment is substantially the same as that in Embodiment 1, with the main difference being that no filler is added to the raw material.

[0070] Performance testing and result analysis

[0071] The cold-resistant and environmentally friendly elastomer sheath materials prepared in Examples 1-4 and Comparative Examples 1-3 were respectively subjected to low-temperature performance tests, and the testing standards were: GB / T 528-2009, GB / T 531-2008, GB / T 529-2008 and GB / T 1681-2009, and the relevant data were recorded in Table 1;

[0072] Table 1: Test data record table

[0073]

[0074]

[0075] It can be seen from Table 1 that, compared with the comparative example, the cold-resistant and environmentally friendly elastomer sheath materials prepared in Examples 1-4 have good performance in Shore hardness, tensile strength, elongation at break, tear strength and resilience. The moderate Shore hardness makes the sheath less likely to be scratched and worn during use, and can better resist external mechanical impact and friction, and maintain the appearance integrity of the sheath. The high tensile strength means that the material can withstand a large tensile force without breaking. The high elongation at break makes the material have good flexibility and can adapt to various complex shapes and size changes. The high tear strength can effectively resist the tearing effect of external forces and prevent the sheath from rapidly expanding into a large crack when punctured or scratched by a sharp object.

[0076] In the present invention, by adding aliphatic TPU and epoxy soybean oil, the flexibility and cold resistance of the material can be improved, so that the sheath material has excellent weather resistance, cold resistance and environmental protection performance. The use of ultraviolet absorber improves the weather resistance of the material and prevents ultraviolet damage to the material.

[0077] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold-resistant and environmentally friendly elastomer sheath material, characterized in that: The invention comprises the following raw materials in parts by weight: 70-80 parts by weight of aliphatic TPU, 10-20 parts by weight of epoxy soybean oil, 5-10 parts by weight of filler, 0.5-1 parts by weight of triphenyl phosphite, 0.8-1.6 parts by weight of antioxidant, 0.5-1 parts by weight of ultraviolet absorber and 0.3-1.2 parts by weight of calcium stearate.

2. The cold-resistant and environmentally friendly elastomer sheath material according to claim 1, characterized in that: The filler is selected from any one of talc and calcium carbonate.

3. The cold-resistant and environmentally friendly elastomer sheath material according to claim 1, characterized in that: The antioxidant is selected from any one of antioxidant 1010 and antioxidant 1076.

4. The cold-resistant and environmentally friendly elastomer sheath material according to claim 1, characterized in that: The ultraviolet absorber is any one of 2-(2'-hydroxy-3',5'-di-tert-phenyl)-5-chlorobenzotriazole, 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxybenzophenone.

5. The cold-resistant and environmentally friendly elastomer sheath material according to claim 1, characterized in that: The preparation method of the cold-resistant and environmentally friendly elastomer sheath material comprises the following steps: S1. Accurately weigh aliphatic TPU, epoxy soybean oil, filler, triphenyl phosphite, antioxidant, ultraviolet absorber and calcium stearate, and add aliphatic TPU, epoxy soybean oil and filler into a premixer in sequence and stir and mix thoroughly; S2. Under stirring, add triphenyl phosphite, antioxidant 1010 and ultraviolet absorber into the stirrer in sequence, continue stirring for 40-50 minutes, add calcium stearate after fully mixing and continue stirring for 15-20 minutes, and take out the raw materials after they are completely mixed; S3, after the mixing is completed, the mixed material is added to the extruder, and the extruder is started to melt the material and extrude it into a continuous strip or tubular sheath material; S4, after the extrusion is completed, the extruded sheath material is cooled, shaped and collected; S5. The collected sheath materials are tested and packaged and stored after they are qualified.

6. The cold-resistant and environmentally friendly elastomer sheath material according to claim 5, characterized in that: In step S4, the cooling and shaping comprises the following steps: S41, the sheath material extruded by the extruder enters the cooling water tank through the guide device; S42, the jacket material moves with the water flow in the cooling water tank, continuously exchanges heat with the cooling water, and gradually cools and sets; S43, after being cooled in the water tank, the jacket material is introduced into a bellows, and high-speed airflow is used to further cool the jacket material and dry the moisture on the surface of the jacket material.

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