Normal-pressure boiling dyeable biomass polyester fiber and preparation method thereof

Abstract

The invention discloses a novel normal-pressure boiling dyeable biomass polyester fiber which comprises the following raw materials: 63-68wt% of terephthalic acid, 1.5-33wt% of biomass ethylene glycol, 1.5-33wt% of biomass 1,2-propanediol, 2-8wt% of monomer 5-sodiumsulfa bis-isophthalate (SIPE) and 0.01-0.03wt% of catalyst potassium fluotitanate. A preparation method of the polyester fiber comprises the following steps: performing esterification and polycondensation reaction on the raw materials to obtain a biomass polyester chip; and based on optimal fiber-spinning process parameters, producing to obtain the biomass polyester fiber having a normal-pressure boiling dyeable function. The fiber has the characteristics of natural softness, low static, favorable resilience and low-temperature dyeing, is boiling dyeable under normal pressure, has high dye-uptake rate and dye exhaustion rate, can be blended with a natural fiber such as wool and the like, has the advantages of cost saving, energy consumption reduction and clean production, can reduce the dependence of the chemical fiber industry on petroleum and can greatly relieve resource restriction and environment pressure.

Description

technical field [0001] The invention relates to a biomass polyester fiber and a preparation method thereof, in particular to a biomass polyester fiber with normal pressure boiling dyeing function and a preparation method thereof. Background technique [0002] China is the largest producer of chemical fiber in the world. The development of chemical fiber has been strong in recent years. By 2015, the production capacity of chemical fiber will reach 46 million tons, and the proportion of chemical fiber in the total textile fiber processing will reach 76%. The growth depends on limited and non-renewable petroleum resources. The raw material with the largest demand for synthetic chemical fiber polyester chips is ethylene glycol. In 2012, the apparent demand for ethylene glycol in China was about 7 million tons. If all oil refining is used, It will consume 70 million tons of crude oil, which is equivalent to the annual output of 1.4 Daqing Oilfields. This will undoubtedly bring gr...

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Problems solved by technology

Invention patent 201210069191.8 discloses that it uses corn-based biomass ethylene glycol developed by Changchun Dacheng Group as raw material, esterifies with terephthalic acid, and then polycondenses to obtain poly-component diol ester of terephthalate (PDT ), which limits the content of other polyols in biomass ethylene glycol, such as propylene glycol, butanediol, and sorbitol, but the biomass fibers produced by it cannot achieve atmospheric pressure boiling dyeing characteristics

Based on the above mechanism, fiber is usually dyed by high-temperature and high-pressure dyeing method, which needs to be carried out in a high-temperature and high-pressure dyeing container with a temperature of 130°C and a pressure of 0.1-0.2 MPa. high cost

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