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Molten resin defoaming method and spinning forming method

A technology of molten resin and forming method, which is applied in the direction of melt spinning, filament forming treatment, spinning solution filtration, etc., which can solve the problems of sticking and agglomeration of molten resin on scrapers or umbrella pages, so as to reduce air bubbles and avoid Effect of degradation reaction and stable performance

Active Publication Date: 2021-02-23
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not suitable for molten resin. Due to the high creep resistance of the molten resin, it is difficult for the scraper or umbrella to coat the molten resin into a thin film. Due to the high viscosity of the molten resin, it is easy for the scraper or umbrella to Sticky and agglomerated by molten resin

Method used

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  • Molten resin defoaming method and spinning forming method
  • Molten resin defoaming method and spinning forming method
  • Molten resin defoaming method and spinning forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a method for defoaming molten resin, comprising the steps of:

[0042] S1, feed;

[0043] S2. Spinning the molten resin in a vacuum environment;

[0044] S3. In a vacuum environment, degassing the spun resin.

[0045] Further, vacuum treatment is carried out after feeding. The molten resin is then subjected to a spinning process. Since the molten resin is in a vacuum room temperature environment after the spinning process, the molten resin is sprayed out into resin filaments due to the lowering of the resin temperature and the high viscosity of the resin. The resin filaments are always in a vacuum environment, and the specific surface area of ​​the resin sprayed into a filament state increases significantly, and air bubbles exist on the surface or inside of the resin filaments. The surface or inside of the silk escapes, and the vacuum defoaming effect is remarkable.

[0046] In the step S1, the feeding process is carried out in a vacuum envi...

Embodiment 2

[0053] Such as Figure 1 to Figure 3 As shown, the present embodiment provides a degassing device, the degassing device includes a feed module 1, and a spinning module 2 connected to the feed module 1; a degassing module 3, used for resin degassing, The degassing module 3 is arranged under the spinning module 2 ; the vacuum chamber 4 , the spinning module 2 and the degassing module 3 are arranged in the vacuum chamber 4 . The vacuum chamber 4 in this embodiment is connected to a vacuum pump (not shown in the figure) through the vacuum port 45 to extract the air in the vacuum chamber 4 to create a vacuum environment.

[0054] Further, the feeding module 1 is arranged outside the vacuum chamber 4, the feeding module 1 is connected to the spinning module 2, and after the molten resin is fed, the first extruder 12 and the The molten resin forms a closed space, and the vacuum pump is turned on to evacuate, so that the spinning module 2 and the degassing module 3 can obtain a vacuu...

Embodiment 3

[0064] Such as Figure 1 to Figure 6 As shown, this embodiment provides a spinning forming device, the spinning forming device includes the degassing device described in Embodiment 2, and also includes a spinning module 5 for degassing the defoaming device Resin spinning molding.

[0065] Further, the spinning module 5 includes a heating cylinder 52, which is arranged under the defoaming module 3, and one end of the heating cylinder 52 is connected with the defoaming module 3; the second extruder 51 is arranged on the above the degassing module 3, cooperate with the hollow chamber of the degassing module 3, and reciprocate in the heating cylinder 52 along the axial direction of the second extruder 51; the second spinneret 53, The second spinneret 53 is connected to the other end of the heating cylinder 52 . The present invention also connects one end of the heating cylinder 52 to the degassing module 3, so that the resin degassed by the degassing device can directly enter th...

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PUM

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Abstract

The invention discloses a molten resin defoaming method and a spinning forming method. The defoaming method comprises the following steps: S1, feeding; S2, in a vacuum environment, carrying out spinning treatment on molten resin; and S3, in the vacuum environment, carrying out defoaming treatment on the resin subjected to spinning. According to the molten resin defoaming method provided by the invention, the molten resin is jetted into filaments by a spinning process, the specific surface area of the resin filaments is increased, bubbles are extremely easy to escape from the surfaces or the interiors of the resin filaments, and the defoaming effect is remarkable. The invention further provides a spinning forming method, the defoamed resin is spun, the bubbles in resin yarn are remarkably reduced, and the quality of the resin yarn is remarkably improved.

Description

technical field [0001] The invention belongs to the field of resin spinning, and in particular relates to a method for defoaming molten resin and a spinning forming method. Background technique [0002] Resins can be classified into thermoplastic resins and thermosetting resins. In the process of producing resin fibers, one of the most fundamental factors determining the quality of raw resin filaments depends on the defoaming effect of the spinning solution. The quality of the defoaming effect directly determines whether the later spinning process can be carried out smoothly. There will be bubbles in the spinning solution during polymerization or transportation. Larger bubbles will cause interruption, deformation, and end breakage of the spinning solution through the spinneret hole, while smaller bubbles will remain in the fiber through the spinneret hole, causing The fiber has holes, and it is easy to break to form wool and broken filaments during drafting. When the defo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D1/10
CPCD01D5/08D01D1/103
Inventor 马永梅向前张京楠叶钢郑鲲曹新宇
Owner INST OF CHEM CHINESE ACAD OF SCI
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