TWI809793B - Decolorization method for polyester textile - Google Patents
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本發明是有關於一種紡織品的脫色技術,且特別是有關於一種聚酯紡織品的脫色方法。The invention relates to a decolorization technology of textiles, in particular to a decolorization method of polyester textiles.
全球知名紡織品牌商共同訂定的循環經濟生產策略,是在2025年增加25%的回收聚酯使用量,在2030年達成100%使用回收聚酯/永續材質紡織品。The circular economy production strategy jointly formulated by world-renowned textile brands is to increase the use of recycled polyester by 25% in 2025, and achieve 100% use of recycled polyester/sustainable material textiles in 2030.
然而,目前纖維回收料源受限於僅表面脫色,殘餘的染料易造成回收纖維於再製的過程發生裂解而無法紡絲等技術瓶頸,限縮聚酯紡織品的可再利用性。However, the current source of fiber recycled materials is limited to surface decolorization, and residual dyes are likely to cause technical bottlenecks such as cracking of recycled fibers during the remanufacturing process and failure to spin, which limits the reusability of polyester textiles.
本發明提供一種聚酯紡織品的脫色方法,能有效針對纖維中的分散性染料進行萃取,達到聚酯纖維脫色的目的,進而改善聚酯紡織品的可再利用性。The invention provides a method for decolorizing polyester textiles, which can effectively extract disperse dyes in fibers, achieve the purpose of decolorizing polyester fibers, and further improve the reusability of polyester textiles.
本發明的聚酯紡織品的脫色方法是對以分散型染料染色過的聚酯紡織品進行脫色。所述脫色方法包括先提供第一溶液與第二溶液,其中所述第一溶液包括水與膨潤劑,所述第二溶液包括水與界面活性劑。然後,先將所述聚酯紡織品含浸至所述第一溶液中,並進行第一加熱處理,以使所述聚酯紡織品膨潤並釋放出所述分散型染料。在進行所述第一加熱處理後,取出處理後之所述聚酯紡織品,再含浸至所述第二溶液進行第二加熱處理,以使所述界面活性劑萃取分散所述分散型染料。The method for decoloring polyester textiles of the present invention is to decolorize polyester textiles dyed with disperse dyes. The decolorization method includes first providing a first solution and a second solution, wherein the first solution includes water and a swelling agent, and the second solution includes water and a surfactant. Then, first impregnate the polyester textile into the first solution, and perform a first heat treatment, so that the polyester textile swells and releases the disperse dye. After the first heat treatment, the treated polyester textile is taken out, and then impregnated into the second solution for a second heat treatment, so that the surfactant can extract and disperse the disperse dye.
基於上述,本發明通過膨潤劑進行的第一加熱處理,先使聚酯纖維分子鏈膨潤,再搭配界面活性劑進行的第二加熱處理將分散性染料萃取出,達到分子鏈間深層脫色的效果。Based on the above, the present invention uses the swelling agent to perform the first heat treatment to swell the molecular chains of the polyester fiber first, and then uses the second heat treatment with a surfactant to extract the disperse dyes to achieve the effect of deep decolorization between the molecular chains .
為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施例作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail as follows.
圖1是依照本發明的一實施例的一種聚酯紡織品的脫色步驟圖。在圖1中,本實施例的脫色方法是針對以分散型染料染色過的聚酯紡織品,且聚酯紡織品可為純聚酯纖維(聚對苯二甲酸乙二酯,PET)構成的纖維品或是在聚酯纖維混摻少許彈性纖維(Spandex)的纖維品,如混摻25%以下或12%以下的彈性纖維。Fig. 1 is a diagram of the decolorization steps of a polyester textile according to an embodiment of the present invention. In Figure 1, the decolorization method of this embodiment is aimed at polyester textiles dyed with disperse dyes, and polyester textiles can be fiber products made of pure polyester fibers (polyethylene terephthalate, PET) Or a polyester fiber blended with a little elastic fiber (Spandex), such as blending less than 25% or less than 12% elastic fiber.
首先,在步驟S100中,提供第一溶液,其中所述第一溶液基本上包括水與膨潤劑。所述膨潤劑可列舉但不限於C3~C8的醇類、C4~C8的酮類、酚類或前述之組合,其中C3~C8的醇類例如1-丁醇、1-己醇等;C4~C8的酮類例如苯乙酮、丙酮、丁酮等;酚類例如苯酚、間-甲酚(m-Cresol)、鄰苯基苯酚、對苯基苯酚等。在第一溶液中的膨潤劑的濃度可在1 wt%~30 wt%,較佳是1 wt%~25 wt%,更佳是1 wt%~20 wt%。First, in step S100, a first solution is provided, wherein the first solution basically includes water and a swelling agent. The swelling agent can be listed but not limited to C3-C8 alcohols, C4-C8 ketones, phenols or the combination of the above, wherein C3-C8 alcohols such as 1-butanol, 1-hexanol, etc.; C4 ~C8 ketones such as acetophenone, acetone, butanone, etc.; phenols such as phenol, m-cresol (m-Cresol), o-phenylphenol, p-phenylphenol, etc. The concentration of the swelling agent in the first solution may be 1 wt% to 30 wt%, preferably 1 wt% to 25 wt%, more preferably 1 wt% to 20 wt%.
在步驟S110中,提供第二溶液,其中所述第二溶液包括水與界面活性劑。在一實施例中,所述界面活性劑可為異丙醇;在另一實施例中,所述界面活性劑可為水溶性陰離子型界面活性劑,例如是選自聚萘甲醛磺酸鈉鹽與其衍生物、磺酸基琥珀酸二異辛酯鈉鹽與其衍生物或前述之組合。所述第二溶液中的所述界面活性劑若是異丙醇,其濃度可為5 wt%~20 wt%,較佳是5 wt%~10 wt%。所述第二溶液中的所述界面活性劑若是水溶性陰離子型界面活性劑,其濃度可為0.1 wt%~1.0 wt%,較佳是0.1 wt%~0.5 wt%。In step S110, a second solution is provided, wherein the second solution includes water and a surfactant. In one embodiment, the surfactant can be isopropanol; in another embodiment, the surfactant can be a water-soluble anionic surfactant, such as selected from polynaphthaldehyde sulfonic acid sodium salt Its derivatives, sodium diisooctyl sulfosuccinate and its derivatives, or a combination of the foregoing. If the surfactant in the second solution is isopropanol, its concentration may be 5 wt% to 20 wt%, preferably 5 wt% to 10 wt%. If the surfactant in the second solution is a water-soluble anionic surfactant, its concentration may be 0.1 wt% to 1.0 wt%, preferably 0.1 wt% to 0.5 wt%.
接著,將聚酯紡織品含浸至第一溶液中,並進行步驟S120的第一加熱處理,以使所述聚酯紡織品膨潤並釋放出所述分散型染料,其中所述第一加熱處理的溫度高於聚酯纖維的玻璃轉化溫度Tg,例如80°C~140°C。若是以節省能源的觀點來看,可為80°C~100°C。至於所述第一加熱處理的時間約在4小時內,如2小時內或0.5小時內。Next, impregnate the polyester textile into the first solution, and perform the first heat treatment in step S120, so that the polyester textile swells and releases the disperse dye, wherein the temperature of the first heat treatment is as high as Based on the glass transition temperature Tg of polyester fiber, for example, 80°C to 140°C. From the point of view of saving energy, it can be 80°C to 100°C. The time for the first heat treatment is within 4 hours, such as within 2 hours or within 0.5 hours.
在進行步驟S120的第一加熱處理後,取出處理後之聚酯紡織品,再含浸至第二溶液進行步驟S130的第二加熱處理,以使第二溶液中的界面活性劑萃取分散所述分散型染料,其中所述第二加熱處理的溫度高於聚酯纖維的玻璃轉化溫度Tg,例如80°C~140°C。若是以節省能源的觀點來看,可為80°C~100°C。所述第二加熱處理的時間則可設定在60分鐘以內,如30分鐘以內或20分鐘以內。After the first heat treatment in step S120, take out the treated polyester textile, and then impregnate it into the second solution for the second heat treatment in step S130, so that the surfactant in the second solution can extract and disperse the dispersed type Dyes, wherein the temperature of the second heat treatment is higher than the glass transition temperature Tg of the polyester fiber, for example, 80°C-140°C. From the point of view of saving energy, it can be 80°C to 100°C. The time for the second heat treatment can be set within 60 minutes, such as within 30 minutes or within 20 minutes.
以下列舉實驗來驗證本發明的功效,但本發明並不侷限於以下的內容。The following experiments are listed to verify the efficacy of the present invention, but the present invention is not limited to the following content.
〈材料〉<Material>
待脫色纖維品:以Blue 79染料染色的聚酯布樣(布重: 1g),以分光光度計測量的色彩空間L*a*b*為25.20/-1.03/-23.97。Fiber to be decolorized: polyester fabric sample dyed with Blue 79 dye (fabric weight: 1g), the color space L*a*b* measured by a spectrophotometer is 25.20/-1.03/-23.97.
膨潤劑:苯乙酮(CAS 98-86-2)、苯酚(CAS 108-95-2)、丙酮(CAS 67-64-1)、丁酮(CAS 78-93-3)。Swelling agents: acetophenone (CAS 98-86-2), phenol (CAS 108-95-2), acetone (CAS 67-64-1), butanone (CAS 78-93-3).
界面活性劑:異丙醇(CAS 67-63-0)、聚萘甲醛磺酸鈉鹽(CAS 9084-06-4)、磺酸基琥珀酸二異辛酯鈉鹽(CAS 577-11-7)。Surfactant: Isopropanol (CAS 67-63-0), Polynaphthalene Sulfonate Sodium Salt (CAS 9084-06-4), Diisooctyl Sulfosuccinate Sodium Salt (CAS 577-11-7 ).
〈實驗例1~11〉<Experimental examples 1 to 11>
根據下列表1與表2的內容,將膨潤劑溶解於去離子水中,成為第一溶液。根據表1與表2的內容,將界面活性劑溶解於去離子水中,成為第二溶液。According to the contents of Table 1 and Table 2 below, the swelling agent was dissolved in deionized water to form the first solution. According to the contents of Table 1 and Table 2, the surfactant was dissolved in deionized water to form the second solution.
先加熱第一溶液至第一加熱處理的溫度,之後將藍色聚酯布樣投入至上述第一溶液中進行第一加熱處理。處理完成後,將聚酯布樣取出,並置於已加熱至第二加熱處理的溫度的第二溶液中,進行第二加熱處理。完成後以去離子水清洗聚酯布樣並乾燥。First heat the first solution to the temperature of the first heat treatment, and then put the blue polyester cloth sample into the first solution to perform the first heat treatment. After the treatment is completed, the polyester cloth sample is taken out and placed in the second solution heated to the temperature of the second heat treatment for the second heat treatment. After completion the polyester swatches were rinsed in deionized water and dried.
〈比較例〉<Comparative example>
根據下表1,除了使用去離子水進行第一加熱處理,其餘步驟與實驗例4一樣。According to Table 1 below, except that deionized water was used for the first heat treatment, other steps were the same as in Experimental Example 4.
表1
表2
〈分析〉<analyze>
使用分光光度計量測處理後的聚酯布樣的色彩空間L*a*b*值。The color space L*a*b* values of the treated polyester swatches were measured using a spectrophotometer.
首先,實驗例1~7與比較例連同脫色前的藍色聚酯布樣以及染色前的白色聚酯布樣的色彩空間都列於下表3。First, the color spaces of Experimental Examples 1-7 and Comparative Example together with the blue polyester swatches before decolorization and the white polyester swatches before dyeing are listed in Table 3 below.
表3
從表3可得到,沒有膨潤劑的比較例的L值只有19.63,所以完全沒有脫色效果。相較下,本發明的實驗例1~7都具有大於比較例的L值,所以本發明具有一定程度的脫色效果,其中脫色效果較不明顯者適於回收後製作深色布料的應用。It can be obtained from Table 3 that the L value of the comparative example without swelling agent is only 19.63, so there is no decolorization effect at all. In comparison, the experimental examples 1 to 7 of the present invention all have larger L values than the comparative examples, so the present invention has a certain degree of decolorization effect, and those with less obvious decolorization effects are suitable for making dark-colored fabrics after recycling.
而且,根據表3的數據可知,在相同的膨潤劑濃度下,使用苯乙酮作為膨潤劑並改用低濃度的水溶性陰離子型界面活性劑的實驗例4~7,其L值也比脫色前的藍布的L值(25.20)要大得多。Moreover, according to the data in Table 3, it can be seen that at the same swelling agent concentration, the experimental examples 4-7 using acetophenone as the swelling agent and changing to a low concentration of water-soluble anionic surfactant have a higher L value than the decolorizing agent. The L value (25.20) of the former blue cloth is much larger.
然後,將實驗例7~11的色彩空間都列於下表4。Then, the color spaces of Experimental Examples 7-11 are listed in Table 4 below.
表4
根據表4的數據可知,本發明的方法若是在兩次加熱處理的參數均相同的情況下,具有以下條件能達到優異的脫色效果(實驗例7、實驗例11)。 1) 膨潤劑使用5 wt%~10 wt%的苯乙酮。 2) 界面活性劑使用0.1 wt%~0.5 wt%的水溶性陰離子型界面活性劑。 According to the data in Table 4, it can be seen that if the parameters of the two heat treatments are the same in the method of the present invention, the following conditions can achieve excellent decolorization effects (Experimental Example 7, Experimental Example 11). 1) The swelling agent uses 5 wt% to 10 wt% acetophenone. 2) Surfactant Use 0.1 wt% to 0.5 wt% water-soluble anionic surfactant.
綜上所述,本發明的脫色方法是通過含膨潤劑的水溶液先進行第一加熱處理,使聚酯纖維分子鏈膨潤,再搭配界面活性劑進行第二加熱處理將聚酯纖維品內的分散性染料萃取出,達到分子鏈間深層脫色的效果。因此,通過本發明的方法能改善聚酯紡織品的可再利用性。In summary, the decolorization method of the present invention is to carry out the first heat treatment through the aqueous solution containing the swelling agent to swell the polyester fiber molecular chain, and then carry out the second heat treatment with a surfactant to disperse the polyester fiber. The permanent dye is extracted to achieve the effect of deep decolorization between molecular chains. Therefore, the recyclability of polyester textiles can be improved by the method of the present invention.
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.
S100、S110、S120、S130:步驟S100, S110, S120, S130: steps
圖1是依照本發明的一實施例的一種聚酯紡織品的脫色步驟圖。Fig. 1 is a diagram of the decolorization steps of a polyester textile according to an embodiment of the present invention.
S100、S110、S120、S130:步驟 S100, S110, S120, S130: steps
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5668174A (en) * | 1979-11-06 | 1981-06-08 | Toray Industries | Color discharge style method |
US20060070188A1 (en) * | 2004-09-27 | 2006-04-06 | Chemical Products Corporation | Colorant Removal from Polymeric Fibers |
TW200736455A (en) * | 2006-02-17 | 2007-10-01 | Huntsman Adv Mat Switzerland | Process for dyeing polyester |
CN101675102A (en) * | 2007-04-11 | 2010-03-17 | 巴斯夫欧洲公司 | Method for removing color from polymeric material |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5668174A (en) * | 1979-11-06 | 1981-06-08 | Toray Industries | Color discharge style method |
US20060070188A1 (en) * | 2004-09-27 | 2006-04-06 | Chemical Products Corporation | Colorant Removal from Polymeric Fibers |
TW200736455A (en) * | 2006-02-17 | 2007-10-01 | Huntsman Adv Mat Switzerland | Process for dyeing polyester |
CN101675102A (en) * | 2007-04-11 | 2010-03-17 | 巴斯夫欧洲公司 | Method for removing color from polymeric material |
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