Method for producing fine denier and micro-fine denier flat regenerated polyester filaments by means of regenerated polyester bottle pieces

A technology for recycling polyester and polyester bottle flakes, applied in the field of textile and chemical fiber, can solve the problems of existing technology, bottleneck, no preparation method or product, etc., and achieve the effect of promoting technological progress, increasing added value, and improving spinnability

Active Publication Date: 2015-12-23
ZHEJIANG HAILI ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polyester hollow micro-denier fibers (circular section) (CN102517719A), colored polyester micro-denier fibers (circular section) (CN102517682A), porous micro-denier polyester POY, DTY interlaced filaments (circular section) are prepared by using polyester chips for primary spinning. cross-section) (CN102443909A), nylon 6 micro-denier full-drawn yarn (round section) (CN1434155), fine-denier flat polyester stretched yarn (CN102031575A), fine-denier glossy flat polyester pre-oriented yarn (CN103160940A), fine-denier flat polyester yarn (CN103603071A) The production technology has been reported, but there are still technical bottlenecks in the production of micro-denier and micro-denier flat recycled polyester filaments by using recycled polyester bottle flakes, and there is no corresponding preparation method or product in the report

Method used

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  • Method for producing fine denier and micro-fine denier flat regenerated polyester filaments by means of regenerated polyester bottle pieces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the steps of the method for producing fine denier and micro denier flat recycled polyester filaments by using recycled polyester bottle flakes in this embodiment are as follows: the recycled polyester bottles are sorted, broken, cleaned, rinsed and pre-dried. Finally, put it into a vacuum drum, the temperature of the drum is 170°C, and dry for 10 hours. Then put the dried recycled polyester bottle flakes into the screw, the screw length-to-diameter ratio is 30, and the temperatures from the first zone to the seventh zone of the screw are 270°C, 278°C, 285°C, 285°C, 285°C, 285°C, respectively. °C, 285 °C and 285 °C, the screw head pressure is 12Mpa, and the recycled polyester melt is obtained. The regenerated polyester melt enters the liquid-phase viscosity-adjusting homopolymerization kettle after primary filtration (the filtration temperature is 285°C, and the filter screen precision is 180 mesh). The melt temperature in the homopolymerizati...

Embodiment 2

[0030] Such as figure 1 As shown, in this embodiment, the steps of the method for producing fine denier and micro denier flat recycled polyester filaments using recycled polyester bottle flakes are as follows: the recycled polyester bottles are sorted, broken, cleaned, rinsed, pre-dried, etc. Afterwards, put it into a vacuum drum at a drum temperature of 160° C. and dry for 12 hours. Then put the dried recycled polyester bottle flakes into the screw, the screw length-to-diameter ratio is 30, and the temperatures of the first to seventh zones of the screw are 268°C, 277°C, 285°C, 285°C, 285°C, 285°C respectively , 283°C and 283°C, and the screw head pressure was 14Mpa to obtain a recycled polyester melt. The regenerated polyester melt is primary filtered (filter temperature is 282°C, filter screen precision is 160 mesh) and then enters the liquid-phase viscosity-adjusting homopolymerization kettle, and the melt temperature in the liquid-phase viscosity-adjusting homopolymeriza...

Embodiment 3

[0032] Such as figure 1 As shown, in this embodiment, the steps of the method for producing fine denier and micro denier flat recycled polyester filaments using recycled polyester bottle flakes are as follows: the recycled polyester bottles are sorted, broken, cleaned, rinsed, pre-dried, etc. Afterwards, put it into a vacuum drum at a drum temperature of 150° C. and dry for 14 hours. Then put the dried recycled polyester bottle flakes into the screw, the screw length-to-diameter ratio is 32, and the temperatures of the first to seventh zones of the screw are 267°C, 276°C, 283°C, 283°C, 283°C, 283°C respectively , 282°C and 282°C, and the screw head pressure was 15Mpa to obtain a recycled polyester melt. The regenerated polyester melt is primary filtered (filter temperature is 280°C, filter screen precision is 140 mesh) and then enters the liquid-phase viscosity-adjusting homopolymerization kettle, and the melt temperature in the homopolymerization kettle is 283°C; Appropriat...

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Abstract

The invention relates to a method for producing fine denier and micro-fine denier flat regenerated polyester filaments by means of regenerated polyester bottle pieces. At present, technical bottlenecks exist in producing the fine denier and micro-fine denier flat regenerated polyester filaments by means of the regenerated polyester bottle pieces. The method for producing the fine denier and micro-fine denier flat regenerated polyester filaments by means of the regenerated polyester bottle pieces is characterized by comprising the steps that 1, pretreatment is conducted on recycled waste regenerated polyester bottles to obtain the polyester bottle pieces; 2, low-temperature vacuum drying treatment is conducted on pretreated polyester bottle pieces; 3, the dried polyester bottle pieces are sequentially subjected to melted extrusion through a screw, primary filtration, liquid phase viscosity adjustment homopolymerization kettle treatment and secondary filtration, enter a spinning box body with a spinning assembly through a metering pump for treatment and are subjected to cooling through circular blowing, collection oiling, drafting, shaping, winding and doffing, and a finished product is obtained. According to the method for producing the fine denier and micro-fine denier flat regenerated polyester filaments by means of the regenerated polyester bottle pieces, the technical bottlenecks are solved, and the prepared fine denier and micro-fine denier flat regenerated polyester filaments have the advantages of being excellent in comfort, soft, smooth, easy to dye, fluffy, resistant to pilling and the like.

Description

technical field [0001] The invention relates to a method for producing fine-denier and micro-denier flat regenerated polyester filaments by using recycled polyester bottle flakes, belonging to the field of textile chemical fibers. Background technique [0002] Polyethylene terephthalate (referred to as polyester, PET) is a semi-crystalline polymer material that can be used in fields such as textiles and plastics. However, there are differences in the properties of polyester raw materials used in textiles and plastics: such as viscosity, Molecular weight, crystallinity, transparency, etc., so the two have always been used in parallel. In the field of plastics, because the series of bottles, films, utensils and other products made of bottle-grade polyester chips have many advantages such as high strength, good brightness, light weight, good transparency, easy processing, and stable dimensions, so the global demand The volume is increasing year by year. With the extensive use...

Claims

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Application Information

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IPC IPC(8): D01D13/00D01D5/253D01D1/09D01D5/08D01F6/62
Inventor郝超伟陈浩方叶青张吴芬张海滨张克
OwnerZHEJIANG HAILI ENVIRONMENTAL TECH CO LTD