SYNTHETIC RESIN AND SYNTHETIC FIBER CONTAINING LINOLENIC ACID, AND METHOD FOR PRODUCING SAME

Abstract

This invention relates to a synthetic resin or synthetic fiber containing linolenic acid, and to a method of manufacturing the same. This synthetic resin or synthetic fiber contains 0.7 to 2.5 wt % of a vegetable oil that includes 70 wt % or more of linolenic acid and a low-molecular-weight volatile material having a boiling point of 120 to 220° C. in an amount of less than 5 wt %.

Key words

Synthetic resin, synthetic fiber, linolenic acid, low-molecular-weight volatile material, chia seed oil

Claims

1. A synthetic fiber or synthetic resin product, containing 0.7 to 2.5 wt % of a vegetable oil that comprises 70 wt % or more of linolenic acid and a low-molecular-weight volatile material having a boiling point of 120 to 220° C. in an amount of less than 5 wt %.

2. The synthetic fiber or synthetic resin product of claim 1, wherein an amount of linolenic acid in the vegetable oil is 75 wt % or more.

3. The synthetic fiber or synthetic resin product of claim 1, wherein an amount of linolenic acid in the vegetable oil is 80 wt % or more.

4. The synthetic fiber or synthetic resin product of claim 1, wherein an amount of linolenic acid in the vegetable oil is 82 wt % or more.

5. The synthetic fiber or synthetic resin product of claim 1, wherein an amount of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 3 wt %.

6. The synthetic fiber or synthetic resin product of claim 1, wherein an amount of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 1 wt %.

7. The synthetic fiber or synthetic resin product of claim 1, wherein an amount, of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 0.1 wt %.

7. A method of manufacturing a synthetic fiber containing linolenic acid, comprising: polymerizing a fiber-forming polymer, adding 0.7 to 2.5 wt % of a vegetable oil that comprises 70 wt % or more of linolenic acid and a low-molecular-weight volatile material having a boiling point of 120 to 220° C. in an amount of less than 5 wt %, and performing graft polymerization.

9. The method of claim 8, wherein an amount of linolenic acid in the vegetable oil is 75 wt % or more.

10. The method of claim 8, wherein an amount of linolenic acid in the vegetable oil is 80 wt % or more.

11. The method of claim 8, wherein an amount of linolenic acid in the vegetable oil is 82 wt % or more.

12. The method of claim 8, wherein an amount of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 3 wt %.

13. The method of claim 8, wherein an amount of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 1 wt %.

14. The method of claim 8, wherein an amount of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 0.1 wt %.

15. A method of manufacturing a synthetic resin containing linolenic acid, comprising: polymerizing a fiber-forming polymer, adding 0.7 to 2.5 wt % of a vegetable oil that comprises 70 wt % or more of linolenic acid and a low-molecular-weight volatile material having a boiling point of 120 to 220° C. in an amount of less than 5 wt %, and performing graft polymerization.

16. The method of claim 8, wherein an amount of linolenic acid in the vegetable oil is 75 wt % or more.

17. The method of claim 8, wherein an amount of linolenic acid in the vegetable oil is 80 wt % or more.

18. The method of claim 8, wherein an amount, of linolenic acid in the vegetable oil is 82 wt % or more.

19. The method of claim 8, wherein an amount of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 3 wt %.

20. The method of claim 8, wherein an amount of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 1 wt %.

21. The method of claim 8, wherein an amount of the low-molecular-weight volatile material having a boiling point of 120 to 220° C. in the vegetable oil is less than 0.1 wt %.

Description

MODE FOR INVENTION

[0046] Hereinafter, a detailed description will be given of the present invention.

[0047] In the following Examples and Comparative Examples, various properties are measured as follows. [0048] Measurement of fat content (wt %)

[0049] Through GO/MS chromatogram and Gas chromatograph/Mass spectrometer of vegetable oil, measurement was performed based on GC-FID of main products. [0050] Intrinsic viscosity of polyester (dl/g)

[0051] Using a mixed solvent of phenol/tetrachloroethane, the conversion viscosity at 30° C. was measured and calculated as a function of concentration, and the conversion viscosity at which the concentration is zero was represented by IV. [0052] Melting point, glass transition temperature, crystal Unity (J/g), crystallization rate (%)

[0053] Using a differential scanning calorimeter [DSC (200F3, NET2SCH)], a sample was tested at heating and cooling rates of 10° C./min, and thus the crystallinity (J/g) was determined, and the crystallization rate relative to a perfect crystal was determined. [0054] Strength (g/d), elongation (%), dyeing rate

[0055] Using a tension tester by KSF 0520 and through a dyeing process according to KSK ISO/05-A06, comparison with at standard color was performed. [0056] Wet-heat shrinkage rate of long polyester fiber

[0057] A long-fiber sample was separated to a length of 50 cm under a load of 1 mg/d, immersed in pure water at 98° C. for 30 min and then taken out of the water, after which the shrunken length was measured and the shrinkage rate relative to the initial length of 50 cm was calculated. [0058] Perspiration-absorbing and quick-drying rate of fiber

[0059] According to KSK 0815, the absorption rate, absorption speed score and drying speed were compared.

COMPARATIVE EXAMPLE 1

[0060] A mixture of pure polyterephthalic acid and ethylene glycol at a weight ratio of 0.86:0.33 (totaling 1.19) was prepared, esterified at a nigh temperature of 220° C. or more and a pressure of 1.5 kg/m.sup.2 or more to evaporate water at a weight, ratio of 0.19, and polymerized at a high temperature of 280° C. or more in a vacuum, thus giving a polyester polymer (PETI) having a polymerization degree of about 25, which was then cooled and solidified, thereby producing a pellet-shaped raw chip (PET RC). The PET RC was primarily dried at 105° C. and secondarily dried using hot air at 145 to 150° C. thus obtaining a PET dry chip (PET DC) with IV of 0.640 to 0.650.

[0061] To the PET DC, a vegetable fatty acid containing 67 wt % of linolenic acid and about 3.2 wt % of a low-molecular-weight volatile material, obtained from commercially available linseed oil using the method disclosed in Korean Patent No. 0741406, was uniformly continuously sprayed in an amount of 0.6 to 1.2% using a quantitative pump, followed by melt-extrusion using a 5-stage melt extruder, spinning using a spinneret having a diameter of 0.17 to 0.23, and then quick cooling, thereby producing a long polyester fiber.

[0062] Upon stretching and winding at 3100 to 3400 m/min using a lower winder, POY was produced, and SDY was obtained upon stretching and winding at 3800 to 5500 m/min.

[0063] The POY and SDY in which the vegetable fatty acid was crosslinked and polymerized exhibited strength similar to that of general yarn, and were increased by about 4% in elongation. However, when 0.8 wt % or more of fatty acid was added, back-pressure hunting of the spinneret and single-yarn breakage at the spinneret outlet occurred significantly.

[0064] The properties of the obtained yarn are described below.

[0065] The results of DSC and crystallization rate are shown in Table 3 below.

TABLE-US-00003 TABLE 3 Crystallization DSC Resu1ts rate Tg Tc Tm POY DTY Classification (° C.) (° C.) (° C.) (%) (%) General yarn 76 152 254 34.6 30.6 Fatty acid-containing 82 154 253 29.1 26.6 yarn (0.8%)

[0066] The physical properties (POY 124De) are shown in Table 4 below.

TABLE-US-00004 TABLE 4 Tension upon Wet-heat 1.5-fold shrinkage rate Strength Elongation stretching after 1.7-fold (g/d) (%) (TN 1.5-fold) stretching (BWS) General yarn 2.76 120 287 7.2 Fatty acid- 2.76 126 246 8.0 containing yarn (0.8%)

[0067] The physical properties (DTY 75De) are shown in Table 5 below.

TABLE-US-00005 TABLE 5 Perspiration- absorbing and quick-drying Elon- Drying Absorption Strength gation Dyeing speed speed (g/d) (%) Bulk (%) (min) (mm/10 min) General yarn 4.92 18   33% 8 240 100 Fatty acid- 4.82 21 38.5% 13 210 130 containing yarn (0.8%)

EXAMPLE 1

[0068] A preconcentrated vegetable fatty acid having about 67% of linolenic acid was added with 1.0 wt % of an antioxidant, subjected to primary distillation including distillation for 20 min each in individual temperature ranges from 20 to 200° C. under a pressure of 50 mmHg in a non-contact-type distillation column where heat exchange is uniform and further distillation at temperatures increased by 20° C. to discharge a low-molecular-weight volatile material (low-boiling-point material), subjected to secondary distillation at a temperature of 250° C. for 10 min to discharge a middle- or low-boiling-point material, and cooled, followed by removing a carbonated fatty acid using a high-efficiency filter, thereby obtaining a fatty acid in which the amount of linolenic acid was increased to 82 wt % and the amount of low-molecular-weight high-volatile material was decreased, to less than 2 wt %. This fatty acid was quantitatively added in an amount of 0.7 to 2.5 wt % to the PET DC of Comparative Example 1 in the same manner as in Comparative Example 1, thereby yielding POY and SDY.

[0069] During the production process, back-pressure hunting of the spinneret and single-yarn breakage at the outlet of the spinneret did not occur. The obtained filaments were improved in strength and elongation, compared to the filaments of Comparative Example 1, and especially, softness, dyeing property, and perspiration-absorbing and quick-drying properties were remarkably increased.

[0070] Table 6 below shows the physical properties of the obtained yarn.

[0071] The physical properties (DTY 75De) are given in Table 6 below.

TABLE-US-00006 TABLE 6 Perspiration- absorbing and quick-drying Elon- Drying Absorption Strength gation Dyeing speed speed (g/d) (%) Bulk (%) (min) (mm/10 min) General yarn 4.92 18 38 8 240 100 Fatty acid- 4.70 23 39 16 190 200 containing yarn (1.5%)

EXAMPLE 2

[0072] Various types of woven and knitted fabrics were produced using the filaments of Example 1, and the obtained fabric had softness like that of rayon and an outer appearance similar to that of wool. Furthermore, the obtained fabric manifested excellent antistatic and dyeing properties.

EXAMPLE 3

[0073] The vegetable fatty acid used in Example 1 was quantitatively added in an amount of 1.5 wt % to the PETI polymer of Comparative Example 1 using a high-efficiency mixer, cooled and then solidified, thus obtaining chips.

[0074] The chips thus obtained were spun through a typical process to give filaments, and these filaments had the same properties as the filaments of Example 1.

EXAMPLE 4

[0075] The vegetable fatty acid used in Example 1 was quantitatively added in an amount of 1.5 wt % to the PETI polymer of Comparative Example 1 using a high-efficiency mixer, followed by continuous polymerization spinning, thus obtaining filaments. The filaments thus obtained had properties equal or superior to those of the filaments of Example 1.

EXAMPLE 5

[0076] This Example was performed in the same manner as Example 1, with the exception that chia seed oil having 80 wt % of linolenic acid and a low-molecular-weight volatile material of less than 2 wt % was used.

[0077] During the continuous production process, no problems occurred, and the properties of the obtained filaments were similar to those of the yarn of Example 1.

COMPARATIVE EXAMPLE 2

[0078] Onto the PET dry chip (PET DC) of Comparative Example 1, commercially available linseed oil having 56 wt % of linolenic acid and 5.1 wt % of a low-molecular-weight volatile material was uniformly and continuously sprayed in an amount of 0.7 wt % using a quantitative pump, thus producing a long polyester fiber as in Comparative Example 1.

[0079] 30 min after the initiation of production, back-pressure hunting began to occur, and after 40 min, single-yarn breakage frequently occurred, and thus further production was not possible.