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Small solid-phase tack producing device suitable for experimental laboratory and use method thereof

A solid-phase viscosity-increasing, laboratory-use technology, applied in the field of chemical fiber, can solve the problems of increasing molecular weight distribution and dispersibility, large device capacity, large volume, etc., to achieve uniform and stable product quality, high equipment charging coefficient, and compact equipment structure. Effect

Inactive Publication Date: 2008-10-01
张家港保税区万盛机械工业有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The disadvantages of this device are intermittent operation, small batches, uneven batch quality, low heat transfer coefficient, and only about 50% of the charging coefficient. The vacuum system of the large-scale vacuum drum device requires a very large vacuuming capacity. Thereby it is difficult to apply on large-scale industry; Another kind is the continuous device of vacuum drum type, although industrialized application is also arranged at present, this device still has the low loading factor (generally only 20-30%), and the equipment volume is huge, and cost High, in addition, due to the long back-mixing time of the polymer in the equipment, it will also increase the dispersion of the molecular weight distribution
[0004] The above two polycondensation devices have large device capacity and are not suitable for small prototypes in laboratories.

Method used

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  • Small solid-phase tack producing device suitable for experimental laboratory and use method thereof

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Embodiment Construction

[0022] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] Such as figure 1 A small solid-phase thickening device is shown, and its specific structure is expressed as follows: there is a heating jacket 6 on the cylinder body 10, the biphenyl port 5 and 11 and the nitrogen inlet 4 are connected to the jacket 6, and the inlet port 4 is connected to the cylinder body. Material port 13, discharge port 8, vacuum port 12 and sampling port 7, two stirring shafts 16 are installed in the cylinder, stirring blades 17 are installed on the stirring shaft 16, and two ends of the cylinder are equipped with The driven planetary gear transmission system 15 is also connected with the stirring shaft 16. The two ends of the stirring shaft are fixed with heat shields 9 to isolate the material in the cylinder from the outside world. The two ends of the cylinder body 10 are fixed and closed with flange...

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PUM

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Abstract

The invention provides a mini solid state polycondensation device and a using method thereof applicable to labs. The device is characterized by comprising a tank body, a feeding-discharge port and a heating jacket on the tank body, two mixer shafts and mixing arms thereof, a planetary gear drive system, and a vacuumed opening, a nitrogen inlet, a biphenyl inlet and a biphenyl outlet connected with the tank body and the jacket. Before the operation of equipment, biphenyl enters into the jacket of the equipment and is heated to a certain temperature; then polyester chips enter the equipment through a charging opening and the equipment begins to operate. The device of the invention has compact structure and low construction cost, has an equipment feeding coefficient over 65 percent and is applicable to the technological development of factories or the scientific research of scientific research institutions.

Description

technical field [0001] The invention relates to a solid-phase thickening device, more precisely, a small-sized solid-phase thickening device suitable for laboratory use and a method for using the same, belonging to the technical field of chemical fibers. Background technique [0002] Polyethylene terephthalate, also known as polyester, is an industrial raw material that has developed rapidly in recent years. Polyester with an average molecular weight of about 19,000-22,000 can be used to make private textiles and films. High molecular weight (24000-39000) polyester is used in the manufacture of industrial polyester, polyester reinforced plastics and blown polyester bottles. And solid-state polymerization tackification is an important method to manufacture polyester with high viscosity and low carboxyl content. It is the process of heating polyester chips with an intrinsic viscosity of 0.60-0.70 to 200-240°C under the protection of high vacuum or inert gas to increase the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78C08G63/183D01F6/62
Inventor 闵蒋华王萍
Owner 张家港保税区万盛机械工业有限公司
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