Preparation method of TPU (thermo plastic polyurethanes) calendered film

A calendered film and film forming technology, which is applied in the field of TPU calendered film, can solve the problems of high processing cost and low plasticizing efficiency, and achieve the effects of improving plasticizing efficiency, saving costs, and reducing energy consumption

Inactive Publication Date: 2014-05-21
上海吉龙经济发展有限公司
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  • Claims
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Problems solved by technology

"In this patent, the twin-screw extruder plays the role of filtering and assisting plasticization, but still uses the process of batching, high-speed mixing, and internal mixer to practice molding. The plasticizing efficiency is not high, and the processing cost is relatively high.

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  • Preparation method of TPU (thermo plastic polyurethanes) calendered film

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form.

[0024] like figure 1 As shown, the present embodiment provides a method for preparing a TPU calendered film, and the specific steps of the method include:

[0025] Step 1: Use a single-screw extruder to plasticize TPU particles into semi-finished products;

[0026] Step 2: The single-screw extruder is directly connected to the filter of the calendering equipment, and the semi-finished product in step 1 is filtered and plasticized again on the filter of the calendering equipment;

[0027] Step 3: Process the semi-finished product plasticized in step 2 through four-roll forming equipment to form the film;

[0028] Step 4: The film in step 3 is drawn into embossing, cooled by cooling wheel set, and coiled and packaged b...

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Abstract

The invention provides a preparation method of a TPU (thermo plastic polyurethanes) calendered film. The method comprises the following specific steps: 1, plasticizing TPU particles by an extruder to form a semi-finished product; 2, filtering and re-plasticizing the semi-finished product by a filter; 3, processing by using four-roller forming equipment, so as to form the film. The TPU film prepared by the preparation method has excellent physical properties such as tensile strength and tear strength, and has excellent quality; the quality of the product is improved by sufficient plasticizing, and the processing cost of a film product is reduced.

Description

technical field [0001] The invention relates to a TPU calendered film, in particular to a preparation method of a TPU (thermoplastic polyurethane elastomer) calendered film. Background technique [0002] TPU is the abbreviation of Thermoplastic Urethane. The Chinese name is thermoplastic polyurethane elastomer. TPU has strong high tension, high tensile force, toughness and aging resistance. It is a mature environmental protection material. [0003] The existing calendered film production process includes: firstly, the raw materials are weighed through the metering system, put into the high-mixing mixer and mixed, after being processed by the internal mixer, and then transferred to the A rolling machine and the B rolling machine in turn to make the raw materials plastic After being filtered by the filter, it is transferred to the calender for calendering, and then it is drawn and embossed, cooled in the cooling section, transferred to the winch for winding, and finally packag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01
Inventor 田晶晶
Owner 上海吉龙经济发展有限公司
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