Manufacturing method of TPU medical cable and medical cable
A manufacturing method and cable technology, which is applied in the field of cable manufacturing, can solve problems such as narrow processing temperature range, difficult forming processing, and limited development, and achieve the effects of high forming processing accuracy, improved surface quality, and large processing range
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Embodiment 1
[0040] This embodiment provides a method for manufacturing a medical cable. In this embodiment, the raw materials used are as follows:
[0041]
[0042] Based on the above material, such as figure 1 As shown, the present embodiment provides a method for manufacturing a medical cable, comprising steps:
[0043] S1, prepare TPU raw material as carrier, wherein, described TPU raw material comprises 35% diphenylmethane diisocyanate, 55% polyester glycol and 10% butanediol, and described carrier Mixing with mixed chain extenders;
[0044] S2, preparing synthetic color masterbatch;
[0045] S3, preparing a ternary mixture;
[0046] S4, adding a ternary mixture and a synthetic color masterbatch to the carrier to obtain a TPU blend;
[0047] S5, extruding to form a medical cable;
[0048] Wherein, the composition of the carrier accounts for not less than 50%.
[0049] In this embodiment, the steps S1 , S2 , and S3 are performed in no particular order, and may be performed sim...
Embodiment 2
[0074] Based on the above method, this embodiment provides a specific example of a TPU blend, which is based on the above-mentioned TPU raw material, adding a ternary mixture, a mixed chain extender, and a color masterbatch to obtain a modified TPU blend , and its main components are as follows:
[0075]
[0076] In this example, the monomer unit ratio of the TPU blend is (MDI:AA:PTMG:EG=35:40:9:5), and the cable extruded at 190±10°C has the following characteristics :
[0077] 1. The characteristics of TPU are modified, the surface has no crystal point particles, and the surface is fine and matte;
[0078] 2. The minimum skin thickness is 0.25MM, the product quality is good, no eccentricity, pothole defects;
[0079] 3. When making electric wire core wire, the low noise is less than 100MV (qualified).
[0080] It addresses the following deficiencies:
[0081] 1. By adding PTMG and reducing AA, the performance of TPU is improved, the heat-resistant temperature of the ca...
Embodiment 3
[0085] Taking TPU (A75E5040) 75%, adding 15% ternary mixture, mixing chain extender 5%, and masterbatch 5% as an example, the main components of the modified TPU blend are as follows:
[0086]
[0087] In this example, the monomer unit ratio of the TPU blend is (MDI:AA:PTMG:EG=35:47:3:5), extruded at a temperature of 185±°C, and the obtained cable has The following characteristics:
[0088] 1. Most of the characteristics of TPU are retained, with a small amount of crystal point particles;
[0089] 2. The minimum skin thickness is 0.35MM, and the product quality is good, without eccentricity and pothole defects;
[0090] 3. When making electric wire core wire, the low noise is less than 200MV (medium).
[0091] The cable of the present embodiment has solved following defect:
[0092] Compared with the formula of Example 2 (MDI:AA:PTMG:EG=35:40:9:5), the share of PTMG decreases, the relative share of (MDI+AA) increases, and most of the advantages of the TPU (A75E5040) cabl...
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Abstract
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