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Production method for high-physical-property TPU

A production method and high physical property technology, applied in the production field of high physical property TPU, can solve the problems of poor physical properties, poor TPU fluidity, TPU application constraints, etc., and achieve the effect of improved physical properties, good formability, and shortened molding cycle

Active Publication Date: 2020-04-17
POLYOL MACROMOLECULE POLYMER FUJIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TPU has poor fluidity in processing. For products with high transfer rate (such as toothbrush bristles, it is necessary to use TPU with good fluidity and low viscosity, but its physical properties will deteriorate accordingly, which restricts the application of TPU.

Method used

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  • Production method for high-physical-property TPU
  • Production method for high-physical-property TPU
  • Production method for high-physical-property TPU

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A production method of TPU with high physical properties is based on polyether type TPU as raw material, and its model, hardness and density are shown in Table 1. First, the polyether type TPU is placed in an oven, dried at 100 ° C for 4 hours, and then placed In a closed twin-screw extruder, fill with nitrogen, and knead under the conditions of nitrogen protection, rotation speed of 100rpm, and temperature of 200°C for 1 to 10 minutes to obtain TPU with high physical properties. The model is marked as TPU-E385A.

Embodiment 2

[0026] A production method of TPU with high physical properties is based on polyether type TPU as raw material, and its model, hardness and density are shown in Table 1. First, the polyether type TPU is placed in an oven, dried at 100 ° C for 4 hours, and then placed In a closed twin-screw extruder, fill with nitrogen, and knead under the conditions of nitrogen protection, rotation speed of 100rpm, and temperature of 200°C for 1-10min to obtain TPU with high physical properties. The model is marked as TPU-E390A.

Embodiment 3

[0028] A production method of TPU with high physical properties is based on polyether type TPU as raw material, and its model, hardness and density are shown in Table 1. First, the polyether type TPU is placed in an oven, dried at 100 ° C for 4 hours, and then placed In a closed twin-screw extruder, fill with nitrogen, and knead under the conditions of nitrogen protection, rotation speed of 100rpm, and temperature of 210°C for 1-10min to obtain TPU with high physical properties. The model is marked as TPU-E395A.

[0029] The TPU raw materials in the above embodiments are provided by Kunsheng Polymer Materials (Fujian) Co., Ltd.

[0030] The index of each TPU in the embodiment 1~3 of table 1

[0031] Example model Shore hardness (shore A) Density (g / cm 3 )

1 TPU-E385A 85 1.12 2 TPU-E390A 90 1.12 3 TPU-E395A 95 1.13

[0032] 2. Performance test of high physical property TPU

[0033] 1. Viscosity test of high physical property TPU...

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Abstract

The invention discloses a production method for high-physical-property TPU. The production method comprises the following steps: taking TPU as a raw material, putting the TPU into an airtight twin-screw extruder, charging nitrogen gas, and mixing under protection of the nitrogen gas to obtain the high-physical-property TPU. According to the production method for the high-physical-property TPU disclosed by the invention, the produced TPU product is good in mobility, is liable to eject during injection moulding, is good in moulding property, is short in moulding period, and is improved in physical property. The production method can be used for quickly ejecting and moulding products with a high transfer rate and thin parts.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a production method of TPU with high physical properties. Background technique [0002] In the past ten years, thermoplastic elastomer (TPE) has been widely used in the market. This kind of polymer material not only has good physical properties, but also is easy to process and shape. The remaining materials can be recycled, which is in line with the current development trend of environmental protection materials. , Coupled with the continuous innovation and research and development of enterprises, the types of thermoplastic elastomers are more complete and the applications are more extensive. So far, TPE materials include TPS, TPV, TPU, TPVC, TPA, TPEE and other types. [0003] Among them, TPU (thermoplastic polyurethane elastomer) belongs to a class of elastic polymer materials containing more carbamate groups (—NHCOO—) in its molecular chain. It is made by reacting ...

Claims

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Application Information

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IPC IPC(8): B29C48/40B29C48/00B29K75/00
CPCB29C48/40B29C48/00B29K2075/00
Inventor 林伟华谢胜华谢梅霞何帅吉王意荣
Owner POLYOL MACROMOLECULE POLYMER FUJIAN