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Modified TPE material production process and modified TPE material

A production process and modification technology, which is applied in the field of TPE materials, can solve the problems of long time consumption, affecting the production efficiency and production capacity of injection molding workpieces, and complicated and complicated processes, and achieve the effects of good mold release performance, superior physical properties and processing performance

Inactive Publication Date: 2020-07-10
东莞市山普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of release agent can also make the injection molded workpiece release better, it is not a modification of the injection molding material itself. It needs to be added after the mold has been used for a period of time. The process of adding the release agent to the mold is cumbersome Complicated and time-consuming, affecting the production efficiency and capacity of injection molded workpieces

Method used

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  • Modified TPE material production process and modified TPE material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A modified TPE material production process, comprising the following steps:

[0050] Step 1. Absorption of white oil: put SEBS and white oil into the mixer in turn, and stir for 30 minutes at a stirring speed of 30r / min to mix evenly, so that SEBS can fully absorb the white oil. The white oil in this example is KN4006;

[0051] Step 2, preparation of mixture: put polyurethane and polyurethane grafting agent into the mixer and mix with SEBS that has absorbed white oil, after stirring for 30min, a uniform mixture is obtained;

[0052] Step 3. Twin-screw extrusion molding: Put the mixture into the feed port of the twin-screw extruder, and use a high-speed gear pump to add silicone oil to the liquid filling port of the melt extrusion section. The aforementioned high-speed gear pump uses 3000r / min High-speed gear pump, the material extruded from the outlet of the twin-screw extruder is the modified TPE material;

[0053] Among them, the proportion relationship between the a...

Embodiment 2

[0058] The production process of the modified TPE material in this example is slightly different from that in Example 1. The difference lies in the addition of fillers during the preparation of the mixture in step 2. The ratio between the amount of silicone oil added per unit time and the extruded amount per unit time of the screw extruder is 0.4:100. In addition, the specific selection and dosage of each material are slightly different.

[0059] In the preparation process of this embodiment, the list of materials added is as follows:

[0060] materials Percentage (%) SEBS 20 No. 32 white oil 19 Polyurethane 55 Polyurethane Grafting Agent 1901 3 2000 calcium carbonate 2.6 silicone oil 0.4

Embodiment 3

[0062] The production process of the modified TPE material in this example is slightly different from that in Example 2, and the specific selection and dosage of each material are slightly different. In this embodiment, the ratio between the amount of silicone oil added per unit time and the extruded amount per unit time of the screw extruder is 0.5:100. In this embodiment, the temperature of the silicone oil filling port is 260°C.

[0063] In the preparation process of this embodiment, the list of materials added is as follows:

[0064] materials Percentage (%) SEBS 25 No. 10 white oil 25 Polyurethane 45 Polyurethane Grafting Agent 1901 3 2000 mesh calcium carbonate 0.8 2500 mesh calcium carbonate 0.7 silicone oil 0.5

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Abstract

The invention relates to the field of TPE materials, in particular to a modified TPE material production process and a modified TPE material. The modified TPE material mainly comprises SEBS, white oil, polyurethane, a polyurethane graft agent, padding and silicone oil. The modified TPE material production process mainly comprises the steps of white oil absorbing, mixture preparing and dual-screw extrusion forming, wherein the silicone oil is added in the dual-screw extrusion forming stage. The silicone oil can be stably and evenly added into the material, industrial producing and manufacturingare facilitated, the obtained material is good in demolding property, and can be widely applied to the field of injection molding machining, the material is a high-property thermoplastic elastomer formed through mixing and granulating of SEBS and polyurethane as the base material, and the material has the excellent physical property and machining property. In addition, the material can be appliedto dual-color injection molding or secondary injection molding of 3C electronic products, kitchen supplies, tool products and the like.

Description

technical field [0001] The invention relates to the field of TPE materials, more specifically, it relates to a modified TPE material production process and the modified TPE material. Background technique [0002] TPE material, the English name is Thermoplastic Elastomer, also known as thermoplastic high elastic plastic body, or thermoplastic elastomer, which is a material with high elasticity, high strength, high resilience of rubber, and injection molding processing characteristics. , generally used in toys, sports equipment and other items. TPE material is environmentally friendly, non-toxic and safe, has excellent colorability, fatigue resistance and temperature resistance, and has a soft touch, excellent processing performance, and does not require vulcanization. Since Bayer first prepared thermoplastic polyurethane (TPU) in 1958, TPE has developed rapidly, especially after the advent of styrene-based thermoplastic elastomers in 1963, the theory of preparation of thermo...

Claims

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Application Information

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IPC IPC(8): B29C48/95C08L75/04C08L53/02C08L91/06C08L83/04C08K3/26
CPCB29C48/95C08K2003/265C08K2201/005C08L75/04C08L2205/035C08L2207/04C08L53/025C08L91/06C08L83/04C08K3/26
Inventor 王宇楚志华
Owner 东莞市山普科技有限公司
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