Spinneret plate for producing diacetate fiber tows

Abstract

The invention discloses a spinneret plate for producing diacetate fiber tows. The spinneret plate comprises a spinneret plate body, a plurality of regular triangle spinneret holes with the same size are formed in the spinneret plate body, gravity centers of all the spinneret holes are positioned on the circumferences of a plurality of coplanar concentric circles, the distance between the gravity centers of every two adjacent spinneret holes on each circumference is marked as the circumferential distance of the spinneret holes, the circumferential distances of the spinneret holes on the same circumference are equal, and the distance between two adjacent circumferences is progressively increased from inside to outside. By the mode, the sizes and the distribution distances of the spinneret holes are determined according to the sizes of the diacetate fiber tows needing production, the spinneret plate is simple in structure and reasonable in layout, the extruded diacetate fiber tows are closer to 'Y' shapes, and flue gas filtering performance is improved.

Description

technical field [0001] The invention relates to the field of spinneret device design, in particular to a spinneret for producing diacetate fiber tow. Background technique [0002] In recent years, the modification, development and research of synthetic fibers have entered a new stage, and new synthetic fibers with fine denier, high performance and multi-functions have emerged one after another, and have been well applied in different fields. However, the performance of the spun synthetic fibers varies greatly, and the shape and specification of the spinneret are the key components to ensure the fiber performance and the smooth progress of the spinning process. [0003] Diacetate cellulose tow is a commonly used synthetic fiber for flue gas filtration. In its industrial production process, when the cellulose diacetate spinning solution is pressed into the spinneret hole, an inlet effect will occur, and part of the energy will be consumed in the deformation of the solution. T...

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Problems solved by technology

[0004] In the production process, after the diacetate fiber tow is extruded from the spinneret hole, the diacetate fiber tow is subjected to the action of hot air in the tunnel, and the solvent in the thin stream gradually volatilizes and solidifies into a tow, and the volatilization speed of the outer solvent is obvious It is higher than the inner side, so it will be deformed into a "Y" shape. The shapes of the spinneret holes used for spinning diacetate fiber tow mainly include round, rectangular, cross-shaped, trilobal, etc. The spinneret holes of these shapes squeeze The cross-sectional shape of the produced diacetate fiber tow is relatively close to the "Y" shape, and the filtering effect is not good when used for flue gas filtration. Therefore, the shape of the existing spinneret hole can no longer meet the demand

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