Composite after-finishing agent and after-finishing method of polyester fabric

Abstract

The invention provides a composite after-finishing agent and an after-finishing method of a polyester fabric, and relates to the technical field of fabric after-finishing. The composite after-finishing agent comprises a first softening agent and a second softening agent, the first softening agent is amino silicon oil microemulsion; the second softening agent comprises polysiloxane, a polyethylene glycol chain segment and a quaternary ammonium salt structure. After the fabric is finished by adopting the composite after-finishing agent disclosed by the invention, the wear resistance and the smooth hand feeling can be obviously improved.

Description

Technical Field

[0001] This invention belongs to the field of fabric finishing technology, and relates to a composite finishing agent and a finishing method for polyester fabrics. Background Technology

[0002] Fabric finishing is an important process for improving fabric performance and wearing comfort. Organosilicon softeners are commonly used fabric finishing agents that can improve the hand feel, wearing comfort, and other aspects of fabric, thereby increasing its value. Abrasion resistance is a crucial property of fabrics. Chinese patent CN100549286C discloses a water-based polyurethane-grafted siloxane abrasion-resistant softening agent, resulting in fabrics that are abrasion-resistant and soft. Chinese patent CN115323782A discloses an abrasion-resistant and anti-pilling fabric, finished with an anti-pilling finishing liquid. The raw materials of the anti-pilling finishing liquid include: 30-40 parts acrylate binder, 6-8 parts magnesium chloride, 10-15 parts softener, 1-3 parts leveling agent, and 6-8 parts nano-silica. While these existing technologies can improve the abrasion resistance of fabrics, they negatively impact the softness of the fabric. This is mainly because existing finishing agents often add raw materials that generate high mechanical strength to improve abrasion resistance, thus affecting the softness of the fabric.

[0003] Therefore, finishing fabrics presents a challenge in achieving both good abrasion resistance and softness. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a composite finishing agent and a finishing method for polyester fabrics.

[0005] The technical solution of the present invention is as follows:

[0006] A composite finishing agent comprising a first softener and a second softener;

[0007] The concentration ratio of the first softener to the second softener is 2.5-20:1;

[0008] The first softener is an amino silicone oil microemulsion;

[0009] The second softener comprises polysiloxane, polyethylene glycol segments, and quaternary ammonium salt structures.

[0010] Preferably, the concentration ratio of the first softener to the second softener is 3-10:1.

[0011] More preferably, the concentration of the first softener is 10-35 g / L.

[0012] Preferably, the amino silicone oil microemulsion is a block amino silicone oil microemulsion;

[0013] The block-type amino silicone oil microemulsion is selected from RH-NB-683G and / or RH-NB-856G of Ningbo Runhe Advanced Materials Technology Co., Ltd.

[0014] Preferably, the second softener is selected from Sinsoft CMK-815A of Kunshan Mingjia Additives Co., Ltd.

[0015] A finishing method for polyester fabric, wherein the polyester fabric to be finished is treated with the composite finishing agent described in any one of claims 1-5, and then subjected to pre-drying and baking in sequence to obtain the finished polyester fabric.

[0016] The pre-drying temperature is 100-120℃;

[0017] The baking temperature shall not be lower than 145°C.

[0018] Preferably, the polyester fabric to be treated is a fabric that has been dyed and reduced.

[0019] Preferably, the finishing process involves one dip and one roll, with an immersion time of 10-15 seconds, followed by rolling in a rolling mill, resulting in a roll yield of 55-70%.

[0020] Preferably, the pre-drying temperature is 110-120℃ and the vehicle speed is 20m / min.

[0021] Preferably, the baking temperature is 150-165℃ and the vehicle speed is 15m / min.

[0022] The beneficial effects of this invention are:

[0023] (1) The present invention uses a composite finishing agent composed of two softeners, which significantly improves the abrasion fastness of the fabric while providing good softness. The finished fabric has good abrasion resistance, softness and color fastness.

[0024] (2) The composite finishing agent of the present invention was used to finish the fabric. After pre-drying and baking at a certain temperature, a better finishing effect was obtained, and the abrasion resistance and color fastness were significantly improved. Detailed Implementation

[0025] The technical solution of the present invention will be further explained and described below through specific embodiments. In one aspect, the present invention proposes a composite finishing agent comprising a first softener and a second softener;

[0026] The concentration ratio of the first softener to the second softener is 2.5-20:1;

[0027] The first softener is an amino silicone oil microemulsion;

[0028] The second softener contains polysiloxane, polyethylene glycol segments, and quaternary ammonium salt structures.

[0029] The composite finishing agent of the present invention is composed of two organosilicon softeners with different compositions. It was unexpectedly discovered that when used for finishing fabrics, it can significantly improve the abrasion resistance of the fabric while maintaining a smooth hand feel.

[0030] For example, the concentration ratio of the first softener and the second softener can be any value or any value between 2.5:1, 3:1, 5:1, 8:1, 10:1, 12:1, 15:1, 18:1, 20:1, etc., without any particular limitation.

[0031] In some embodiments, the concentration ratio of the first softener and the second softener is 3-10:1. For example, the concentration ratio of the first softener and the second softener can be any value or any value between 3:1, 5:1, 6:1, 8:1, 10:1, etc., without any particular limitation.

[0032] Furthermore, the concentration of the first softener is 10-35 g / L. For example, the concentration of the first softener can be any value or any value between 10 g / L, 15 g / L, 20 g / L, 25 g / L, 30 g / L, 35 g / L, etc., without any particular limitation.

[0033] In some embodiments, the amino silicone oil microemulsion is a block-type amino silicone oil microemulsion;

[0034] The block-type amino silicone oil microemulsion was selected from RH-NB-683G and / or RH-NB-856G of Ningbo Runhe Advanced Materials Technology Co., Ltd.

[0035] In some embodiments, the second softener is selected from Sinsoft CMK-815A of Kunshan Mingjia Additives Co., Ltd.

[0036] The present invention found that when the first softener and the second softener are selected from the above two commercially available softeners and combined with the composite finishing agent to finish the fabric, the abrasion resistance of the fabric is significantly improved while maintaining the smooth feel of the silicone. The possible reasons are: (1) The directional adsorption of nonionic and cationic segments and the dual friction coefficient reduction mechanism in the composite finishing agent significantly reduce the sliding friction coefficient between fabric fibers; (2) The cationic component of the second softener can generate electrostatic adsorption between fibers, improving the adhesion strength; (3) The second softener Sinsoft CMK-815A contains an ethoxylated tridecyl alcohol structure. The hydrophobic chain of polysiloxane and the tridecyl chain form a uniformly spread continuous composite film through hydrophobic interaction, further improving the abrasion resistance and washability.

[0037] On the other hand, the present invention also proposes a finishing method for polyester fabrics, wherein the polyester fabric to be finished is finished with the composite finishing agent described in any of the above embodiments, and then undergoes pre-drying and baking in sequence to obtain the finished polyester fabric.

[0038] The pre-baking temperature is 100-120℃;

[0039] The baking temperature shall not be lower than 145℃.

[0040] After the fabric is treated with the fabric composite finishing agent of this invention, it undergoes pre-drying and baking, respectively, which achieves better film formation of the compounded softener on the fabric surface and improves abrasion resistance. The main function of pre-drying is to prevent or minimize cross-linking, remove moisture between fibers, and prevent softener migration. The main function of baking is to allow the first and second softeners to cross-link and form a relatively dense film on the fiber surface.

[0041] Therefore, in this application, the composite finishing agent can improve the abrasion resistance of the fabric by at least three factors: (1) the electrostatic adsorption between the cationic of the second softener and the fiber; (2) the hydrophobic chain of the polysiloxane in the composite finishing agent and the tridecyl chain in the second softener form a uniformly spread continuous composite film through hydrophobic interaction; (3) high-temperature baking causes the first softener and the second softener to cross-link and form a film.

[0042] For the pre-drying temperature, for example, any value or any value between 100℃, 105℃, 110℃, 115℃, 120℃, etc., is acceptable without particular limitation. For the baking temperature, for example, any value or any value between 145℃, 150℃, 155℃, 160℃, 165℃, 170℃, etc., is acceptable without particular limitation. This application finds that a baking temperature exceeding 140℃ is preferable, as this allows for better cross-linking and film formation. A baking temperature not exceeding 170℃ is preferable, although it will not affect the fabric's abrasion resistance, but it may easily cause the fabric to yellow.

[0043] In some embodiments, the polyester fabric to be treated is a dyed and reduced fabric.

[0044] In some embodiments, the process is as follows: one dip and one roll, with an immersion time of 10-15 seconds, followed by rolling in a rolling mill, and a roll-out rate of 55-70%.

[0045] In some embodiments, the pre-baking temperature is 110-120°C and the vehicle speed is 20 m / min. For example, the pre-baking temperature can be any value or any value in between, such as 110°C, 115°C, 120°C, etc., without any particular limitation.

[0046] In some embodiments, the baking temperature is 150-165°C and the vehicle speed is 15 m / min. For example, the baking temperature can be any value or any value in between, such as 150°C, 155°C, 160°C, 165°C, etc., without any particular limitation.

[0047] The technical solution of the present invention will be further described and illustrated below with reference to various embodiments. Unless otherwise specified, the parts mentioned in the following embodiments are parts by weight.

[0048] Example 1

[0049] A finishing process for a high abrasion-resistant polyester fabric, comprising the following steps:

[0050] (1) Dyeing process: Add disperse dye to Ithaca overflow dyeing machine. By weight percentage, add 0.21wt% disperse orange (manufacturer: Longsheng, model: LHF-BS orange) and 1.8wt% disperse black (manufacturer: Yangmao, model: DWH-B black) to the dye, heat to 130℃ at a heating rate of 1.5℃ / min and hold for 40min.

[0051] (2) Reduction washing process: carried out in Ithaca overflow dyeing machine, adding caustic soda and sodium hydrosulfite, heating to 85℃ at 1℃ / min and holding for 25min.

[0052] (3) One dip and one roll:

[0053] The composite finishing agent consists of: first softener (RH-NB-683G) 15g / L and second softener (Sinsoft CMK-815A) 3g / L.

[0054] The polyester fabric that has undergone the reduction washing process was immersed in the composite finishing agent for 10 seconds and then rolled in a rolling mill with a liquid-pickup rate of 60%.

[0055] (5) Pre-drying: The pre-drying temperature is 110℃ and the vehicle speed is 25m / min.

[0056] (6) Baking: The baking temperature is 150℃ and the speed is 20m / min.

[0057] Five portions of the baked and cooled polyester fabric were randomly selected and tested according to GB / T21196.2-2007 "Textiles - Martindale Method - Determination of Abrasion Resistance of Fabrics - Part 2: Determination of Specimen Breakage" (friction load of 12 kPa), GB / T 3921-2008 "Textiles - Tests for Color Fastness - Color Fastness to Washing", and GB / T 3920-2008 "Textiles - Tests for Color Fastness - Color Fastness to Rubbing". The test results are shown in Table 1 below.

[0058] Table 1

[0059]

[0060] As can be seen from the data results in Table 1 above, the polyester fabric treated in this embodiment has good abrasion resistance and color fastness, including color fastness to washing and color fastness to rubbing.

[0061] Example 2

[0062] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the second softener was adjusted from 3g / L to 5g / L. The remaining steps remain unchanged.

[0063] The results of the abrasion resistance and color fastness testing according to the method in Example 1 are shown in Table 2 below.

[0064] Table 2

[0065]

[0066] This embodiment has similar technical effects to Embodiment 1, and the treated polyester fabric has good abrasion resistance and color fastness.

[0067] Example 3

[0068] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the second softener was adjusted from 3 g / L to 1.5 g / L. The remaining steps remain unchanged.

[0069] The results of the abrasion resistance and color fastness testing according to the method in Example 1 are shown in Table 3 below.

[0070] Table 3

[0071]

[0072] This embodiment has similar technical effects to Embodiment 1, and the treated polyester fabric has good abrasion resistance and color fastness.

[0073] Comparative Example 1

[0074] The difference between this comparative example and Example 1 is that in Example 1, the second softener was replaced with the first softener. The remaining steps remain unchanged.

[0075] The results of the abrasion resistance and color fastness testing according to the method in Example 1 are shown in Table 4 below.

[0076] Table 4

[0077]

[0078] Therefore, comparing the results of this comparative example and Example 1, the abrasion resistance of the polyester fabric treated in this comparative example is significantly worse than that of Example 1.

[0079] Comparative Example 2

[0080] The difference between this comparative example and Example 1 is that in Example 1, the first softener was replaced with the second softener. The remaining steps remain unchanged.

[0081] The results of the abrasion resistance and color fastness testing according to the method in Example 1 are shown in Table 5 below.

[0082] Table 5

[0083]

[0084]

[0085] Therefore, comparing the results of this comparative example and Example 1, the abrasion resistance of the polyester fabric treated in this comparative example is significantly worse than that of Example 1.

[0086] Therefore, based on the results of Example 1, Comparative Example 1 and Comparative Example 2, it can be seen that the combination of the first softener and the second softener in this invention significantly improves the abrasion resistance of the treated polyester fabric.

[0087] Comparative Example 3

[0088] The difference between this comparative example and Example 1 is that in Example 1, the baking temperature was adjusted from 150°C to 140°C. The remaining steps remained unchanged.

[0089] The results of the abrasion resistance and color fastness testing method according to Example 1 are shown in Table 6 below.

[0090] Table 6

[0091]

[0092] Therefore, comparing the results of this comparative example with those of Example 1, insufficient baking temperature after finishing will affect the abrasion resistance of polyester fabrics.

[0093] Example 4

[0094] A finishing process for a high abrasion-resistant polyester-spandex fabric includes the following steps:

[0095] (1) Dyeing process: Add disperse dye to Ithaca overflow dyeing machine. By weight percentage, add 0.0007wt% disperse yellow (manufacturer: Changhong, model: E-GL orange), 0.0049wt% disperse red (manufacturer: Longsheng, model: NP-FB red) and 0.0033wt% disperse blue (manufacturer: Jihua, model: E-4R brilliant blue). Heat to 130℃ at a heating rate of 2.0℃ / min and hold for 30min.

[0096] (2) Reduction washing process: carried out in Ithaca overflow dyeing machine, adding caustic soda and sodium hydrosulfite, heating to 80℃ at 1.5℃ / min and holding for 20min.

[0097] (3) One dip and one roll:

[0098] The composite finishing agent consists of: first softener (RH-NB-683G) 25g / L and second softener (Sinsoft CMK-815A) 5g / L.

[0099] The polyester fabric that has undergone the reduction washing process was immersed in the composite finishing agent for 10 seconds and then rolled in a rolling mill with a liquid-pickup rate of 60%.

[0100] (5) Pre-drying: The pre-drying temperature is 120℃ and the speed is 20m / min.

[0101] (6) Baking: The baking temperature is 160℃ and the speed is 15m / min.

[0102] The results of the abrasion resistance and color fastness testing according to the method in Example 1 are shown in Table 7 below.

[0103] Table 7

[0104]

[0105] The polyester fabric treated in this embodiment also has good abrasion resistance and color fastness.

[0106] The results of the smooth hand feel test of the fabrics of Examples 1-4 and Comparative Examples 1-3 are shown in Table 8 below.

[0107] The feel of the material was rated by 10 trained volunteers, and the average score was taken. The score ranged from 1 to 5, with 5 being the best and 1 being the worst.

[0108] Table 8

[0109] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 4 Fraction 4.2 3.9 4.0 3.7 3.5 3.1 4.4

[0110] As can be seen from the results in Table 8 above, the present invention uses a composite finishing agent of a first softener and a second softener to finish the fabric, and the fabric has a better smooth hand feel than when using a single softener.

[0111] Therefore, the present invention uses a composite finishing agent consisting of a first softener and a second softener to finish the fabric, which can further improve the fabric's smooth hand feel while improving its abrasion resistance.

[0112] As described above, the basic principles, main features, and advantages of the present invention have been shown and described. Those skilled in the art should understand that the present invention is not limited to the above embodiments, which are merely preferred embodiments and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the patent and the description should still fall within the scope of the present invention. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A composite finishing agent, characterized in that, It contains a first softener and a second softener; The concentration ratio of the first softener to the second softener is 2.5-20:1; The first softener is an amino silicone oil microemulsion; The second softener comprises polysiloxane, polyethylene glycol segments, and quaternary ammonium salt structures.

2. The composite finishing agent according to claim 1, characterized in that, The concentration ratio of the first softener to the second softener is 3-10:

1.

3. The composite finishing agent according to claim 2, characterized in that, The concentration of the first softener is 10-35 g / L.

4. The composite finishing agent according to claim 1, characterized in that, The amino silicone oil microemulsion is a block-type amino silicone oil microemulsion; The block-type amino silicone oil microemulsion is selected from RH-NB-683G and / or RH-NB-856G of Ningbo Runhe Advanced Materials Technology Co., Ltd.

5. The composite finishing agent according to claim 1, characterized in that, The second softener is selected from Sinsoft CMK-815A of Kunshan Mingjia Additives Co., Ltd.

6. A finishing method for polyester fabrics, characterized in that, The polyester fabric to be treated is treated with the composite finishing agent described in any one of claims 1-5, and then pre-dried and baked in sequence to obtain the treated polyester fabric. The pre-drying temperature is 100-120℃; The baking temperature shall not be lower than 145°C.

7. The finishing method for polyester fabrics according to claim 6, characterized in that, The polyester fabric to be treated is a fabric that has undergone dyeing and reduction.

8. The finishing method for polyester fabrics according to claim 6, characterized in that, The finishing process involves one dip and one roll, with an immersion time of 10-15 seconds, followed by rolling in a rolling mill, resulting in a liquid yield of 55-70%.

9. The finishing method for polyester fabrics according to claim 6, characterized in that, The pre-drying temperature is 110-120℃, and the vehicle speed is 20m / min.

10. The finishing method for polyester fabrics according to claim 6, characterized in that, The baking temperature is 150-165℃, and the vehicle speed is 15m / min.

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