Manufacture method for producing high-shrinkage regenerated terylene short fiber with recovered polyester bottle chips
A technology of recycled polyester and polyester bottle flakes, which is applied in the direction of single-component polyester rayon, melt spinning method, stretch spinning method, etc., and can solve the problems of screw ring knot resistance, recycling restrictions, easy adhesion, etc. , to achieve the effect of solving poor stability, stable shrinkage rate, and low shrinkage rate
Active Publication Date: 2014-06-04
宁波大发新材料有限公司
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Problems solved by technology
[0003] However, due to the low melting point of non-crystalline polyester, it is easy to stick, which seriously affects the drying effect and causes the screw ring to block the material, so the recycling of this type of polyester is greatly restricted.
Method used
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Embodiment Construction
[0014] An example of the manufacturing method described in the patent of the present invention is provided below.
[0015] Take 6.67dtex×102mm hollow polyester staple fiber with boiling water shrinkage of 45% as an example. Include the following steps:
[0016] 1) When drying the non-crystalline PET sheet, the drying temperature of the vacuum drum is 100°C, and the drying time is 6 hours; the ratio (mass percentage) of the non-crystalline PET sheet to the PET bottle flake is 45%: 55%; Materials and bottle flakes are put into the spinning silo;
[0017] 2) Then put in the screw for extrusion and melting to obtain the melt, and the temperature of the screw is 265°C higher than that of PET bottle flake spinning;
[0018] 3) On the basis of the existing spinning equipment, a 1800-hole C-type spinneret is used, the pump supply is 4000g / min, the spinning speed is 850m / min, the spinning temperature is 272°C; the cooling air temperature is 30°C, and the blowing speed is low To 0.6m...
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The invention relates to regenerated terylene short fiber production technology, in particular to a manufacture method for producing high-shrinkage regenerated terylene short fiber with recovered polyester bottle chips. The manufacture method comprises the steps as follows: drying amorphous polyester chips through a low-temperature drying method; mixing the dried amorphous polyester chips with common PET (polyethylene terephthalate) bottle chips; putting the uniformly mixed chips and the bottle chips into a spinning material bin, and then putting into a screw for extruding and smelting so as to obtain smelt; conveying the melt which meets the spinning requirement to a a filter under the effect of a melt conveying pump for filtering, and then putting into a spinning box body; spinning while metering, cooling and applying oil, pulling to feed, and falling into a barrel; finally stretching at low temperature during the post-processing of as-spun fiber. The manufacture method provided by the invention has the characteristic of being high in heat absorbing property; and the production of regenerating the high-shrinkage regenerated terylene short fiber can be achieved.
Description
technical field [0001] The invention relates to a production process of recycled polyester staple fiber, in particular to a manufacturing method for producing high-shrinkage recycled polyester staple fiber from recycled polyester bottle flakes. Background technique [0002] In recent years, with the continuous pursuit of the differentiation of polyester production sheets, the sources of recycled polyester have become more and more complicated, and the recycled polyester often contains a variety of different compounds that are different from those used in the manufacture of polyester staple fibers. The crystalline polyester sheet, film, etc., lead to the influence of modified polyester during the processing of ordinary polyester staple fiber, which causes fluctuations in the quality of recycled polyester staple fiber. Tests have shown that PETG, PCTG and PCTA are non-crystalline copolyesters that cause fluctuations in the quality of ordinary polyester staple fibers. The mate...
Claims
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IPC IPC(8): D01F6/62D01D5/08D01D5/12D01D1/04D01D10/02
Inventor 钱军邢喜全王方河贾同伟杜芳
Owner 宁波大发新材料有限公司