Production method of polylactic acid fiber
A technology of polylactic acid fiber and production method, which is applied in directions such as single-component polyester rayon, fermentation, etc., can solve the problems of low utilization rate of raw materials, many by-products, unfavorable large-scale production of polylactic acid fiber, etc. Economic and environmental benefits, high raw material utilization and yield, and easy promotion and application
Active Publication Date: 2016-06-08
ZHANGJIAGANG ANSHUN TECH DEV
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Problems solved by technology
[0003] However, in the production process of the existing polylactic acid fiber, the process is relatively complicated, which is not conducive to the large-scale production of polylactic acid fiber, and affects the production efficiency of polylactic acid fiber
Moreover, in the existing polylactic acid fiber production process, there are many by-products, and the utilization rate of raw materials is not high
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[0019] The present invention will be described in detail below in conjunction with the implementations shown in the drawings, but it should be noted that these implementations are not limitations of the present invention, and those of ordinary skill in the art based on the functions, methods, or structural changes made by these implementations Equivalent transformations or substitutions all fall within the protection scope of the present invention.
[0020] Such as figure 1 Shown, the production method of polylactic acid fiber of the present invention comprises the steps:
[0021] S1. Provide extraction raw materials, under the action of biocatalyst, add pure lactic acid bacteria and calcium carbonate for fermentation to obtain fermentation liquid;
[0022] S2. After treating the fermented liquid, add sulfuric acid therein, filter after fully stirring, evaporate and concentrate the filtrate, and filter twice to obtain lactic acid;
[0023] S3. Dehydration and cyclization of ...
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Abstract
The invention provides a polylactic acid fiber production method which comprises steps as follows: S1, extraction raw materials are provided and added with pure lactic acid bacteria and calcium carbonate for fermentation under the action of a biological catalyst to obtain fermentation broth; S2, sulfuric acid is added to the treated fermentation broth, the mixture is sufficiently stirred and filtered, and a filtrate is evaporated, concentrated and subjected to secondary filtering to obtain lactic acid; and S3, the obtained pure lactic acid is subjected to dehydration and cyclization to obtain lactide, and the obtained lactide is subjected to ring opening polymerization to obtain polylactic acid fiber. The polylactic acid fiber production method has simple technological process and higher raw material utilization rate and yield, is free of toxic substance emission, facilitates popularization and application, and has good economic and environmental benefits.
Description
technical field [0001] The invention relates to a fiber production method, in particular to a polylactic acid fiber production method. Background technique [0002] Polylactic acid fiber is a fully biodegradable synthetic fiber that can be obtained from grains. After its products are discarded, they can be decomposed into carbon dioxide and water by microorganisms in soil or seawater. When burning, they will not emit poisonous gas and cause pollution. It is a sustainable ecological fiber. [0003] However, in the production process of existing polylactic acid fibers, the process is relatively complicated, which is not conducive to the large-scale production of polylactic acid fibers, and affects the production efficiency of polylactic acid fibers. Moreover, in the existing polylactic acid fiber production process, there are many by-products, and the raw material utilization rate is not high. [0004] Therefore, in view of the above problems, it is necessary to propose a f...
Claims
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IPC IPC(8): C08G63/08D01F6/62C12P7/56
Inventor 李纪安
Owner ZHANGJIAGANG ANSHUN TECH DEV