A deepening agent for fabric and application

Abstract

The present application relates to a kind of textile finishing technical field, applied to cotton fabric, nylon fabric, and polyester blended fabric deepening processing, especially polyester black fabric deepening processing, specifically a kind of fabric deepening agent and application.It includes silica sol and silicone oil emulsion, and the mass fraction ratio is silica sol: silicone oil emulsion=1:1~1:5.It has good deepening, while it can significantly improve the softness of fabric, improve the strength of film, thereby improving fabric fastness.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile finishing, and is applied to deepening processing of cotton fabric, nylon fabric and polyester blended fabric, in particular to deepening processing of polyester black fabric, and specifically to a deepening agent for fabric and application. BACKGROUND

[0002] The main material of "Arabian black" fabric is polyester, and the refractive index of polyester is the highest among common fiber types, reaching 1.73. The smooth surface of polyester fiber causes a large amount of incident light to be reflected on the fabric surface, and only a small amount of incident light is refracted into the fiber to become colored light. Therefore, the color development effect of polyester after dyeing is poor, and deepening processing is needed. In order to obtain better depth, the traditional processing method of general factories is to use low-refractive-index substances for two-stage finishing of the fabric, so as to meet the depth requirements of Arab customers; the first stage uses acrylic resin finishing, and the second stage uses silicone oil finishing. The finishing temperature is above 150 degrees, and the two-stage processing consumes time and energy. The finishing cost of each stage accounts for about 50% of the cost of the auxiliary agent, resulting in a great waste of energy, manpower and time, and there is a great space for simplification. Moreover, the environmental requirements are becoming increasingly stringent, and the original process flow cannot meet the needs of the factory, so optimization is urgently needed. If an auxiliary agent can achieve the effect of the original two-stage processing in one stage, the process can be optimized from the source, and energy saving and emission reduction can be achieved.

[0003] The invention with publication number CN104213400B discloses a silica anti-reflection coating liquid, a preparation method thereof and application in polyester fabric. A commercially available silica water dispersion liquid and a silane coupling agent are added to ethanol, and a nano-silica anti-reflection coating liquid with alkoxy groups on the surface is prepared by reaction. The anti-reflection coating liquid is used for deepening finishing of polyester fabric, and a nano-porous anti-reflection film is constructed on the surface of the fabric, so that the fabric obtains a dark color effect. However, pure silica attached to the surface of the fiber has a slightly insufficient hand feeling and depth compared with two-stage processing.

[0004] The invention with publication number CN105622945B discloses a preparation method of a deepening finishing agent. A quaternary ammonium fluorine-containing silicone oil is prepared by ring-opening polymerization of octamethylcyclotetrasiloxane linear body, trifluoropropylmethylcyclotrisiloxane linear body, ammonia type coupling agent and capping agent, and has a good deepening effect on textile fabric. The depth of polyester fabric can be increased by about 16% according to the K / S value. However, in the case of Arabian black fabric, the deeper the depth, the better, and the deepening amplitude usually needs to reach more than 60%, so the fluorine-containing silicone oil alone cannot meet the depth requirements.

[0005] The invention with publication number CN110964203A relates to a soft and smooth deepening silicone softener preparation method. The soft and smooth deepening silicone oil synthesized is used as the raw oil to prepare the soft and smooth deepening silicone softener. The fabric treated by the soft and smooth deepening silicone softener has obvious soft and smooth hand feeling and certain deepening effect due to the titanium base and polyethylene polyamine chain in the raw oil. However, the processing depth of the black fabric is slightly insufficient.

[0006] The common auxiliary agent for finishing deepening on the market is mainly acrylic deepening agent (refractive index 1.41) and silicone oil deepening agent (refractive index 1.35). The difference of 0.02 in refractive index will greatly affect the deepening effect of the fabric. Therefore, reducing the refractive index of the fabric surface is the most effective way to improve the apparent depth of the fabric.

[0007] In recent years, the porous silica membrane is widely used as an anti-reflection film in the field of solar cells and the like. The refractive index of the porous silica membrane can be as low as about 1.18-1.22, which is higher than the existing conventional deepening materials. However, there are few successful applications of silica sol products in the field of textile deepening. The main problems are as follows: the deepening principle of the existing silica sol is to form a nano-porous structure on the surface. The equivalent refractive index of this structure is affected by the particle size, porosity, particle packing state and the like in the microcosmic aspect, and is affected by the PH, processing temperature and the like in the macroscopic aspect, so it is not easy to control. The existing silica sol on the market has no obvious deepening effect when used for deepening, and it is difficult to maintain stability. In addition, the handle of the fabric treated by the silica sol alone is very rough, which cannot meet the basic handle requirement of the textile. SUMMARY

[0008] The present application mainly solves the problems in the prior art, provides a deepening agent for fabric, which has good deepening effect, can significantly improve the softness of the fabric, improve the strength of the film, thereby improving the fabric fastness, and through reasonable arrangement, the hydroxyl groups of the silica sol are arranged outside, so that the moisture absorption performance of the fabric is improved, thereby improving the antistatic performance, solving the problems of insufficient deepening performance, poor handle, poor fastness and insufficient antistatic performance.

[0009] The above technical problems of the present application are mainly solved by the following technical scheme:

[0010] A deepening agent for fabric, comprising silica sol and silicone oil emulsion, and the mass fraction ratio of the silica sol to the silicone oil emulsion is 1:1-1:5.

[0011] As preferred, the mass fraction of silicon dioxide in the silica sol is 25-40%, the average particle size is 40-110 nm, and the pH value is 7-10. The wavelength of visible light is required to be less than the wavelength of visible light, thereby indirectly controlling the particle accumulation morphology, and the pH value is controlled to be between 7 and 10, and the silica sol is stable in this range. When the pH value is greater than 10, the viscosity increases, and when the pH value is less than 7, the gel phenomenon is prone to occur.

[0012] As preferred, the silicone oil is amino silicone oil, and is contained in an amino silicone oil emulsion system, the ratio of the amino silicone oil to the emulsifier in the system is 5:1-10:1, the solid content of the amino silicone oil is 10%-50%, and the particle size of the silicone oil emulsion is 100-500 nm. The wavelength of visible light is required to be less than the wavelength of visible light.

[0013] As preferred, the amino silicone oil in the silicone oil emulsion has an amino value of 0.2-0.7 and a viscosity of 1000-15000 mpa.s.

[0014] As preferred, the emulsifier in the silicone oil emulsion is one or more non-ionic surfactants.

[0015] As preferred, the preparation is performed in the following manner: the emulsified amino silicone oil emulsion is added first, and then the silica sol of a selected specification is added in a reaction kettle with stirring, and stirring is performed at 60 r / min for 40 min, thereby obtaining the deepening agent.

[0016] An application of a fabric deepening agent comprises:

[0017] The application is used for deepening processing of polyester black fabric, especially for deepening processing of polyester Arab black fabric.

[0018] Or,

[0019] The application is used for deepening processing of cotton fabric, nylon fabric and polyester blended fabric.

[0020] As preferred, the application is used for deepening processing of polyester black fabric, and is used for deepening processing of polyester Arab black fabric in the following steps:

[0021] (1) When the fabric deepening agent according to claim 1 is used, the use amount is 3.2% owf-8% owf, and the treatment liquid is controlled to be between pH 7 and 10,

[0022] (2) The setting parameters are set as follows: the setting machine speed is 25-90 m / min, and the setting temperature is 130-180 DEG C.

[0023] Beneficial effects

[0024] Compared with the prior art, the application provides a fabric deepening agent and application, and has the following beneficial effects:

[0025] First, the deepening processing applied to textile fabric, wherein the silica sol is one of the deepening substances, the mass fraction of silicon dioxide is 25-40%, the average particle size is 40-110 nm, and the wavelength of visible light is less than the average particle size, thereby indirectly controlling the particle accumulation morphology and effectively improving the refractive index of the fabric. Compared with the silica sol deepening on the market, the depth can be optimized.

[0026] Second, the silicone oil emulsion, by selecting appropriate viscosity and appropriate ammonia value of silicone oil, selecting surfactant and appropriate proportion, the HLB value is suitable for emulsifying the silicone oil. The particle size of the silicone oil emulsion is strictly controlled, which not only ensures the depth of the treatment on the fabric surface, but also ensures the stability of the product and the treatment liquid. By controlling the value of the ammonia value of the silicone oil, the yellowing of the fabric surface can be reduced. The HLB value is the hydrophilic-lipophilic balance value of the surfactant.

[0027] Third, the specific combination of silica sol and silicone oil emulsion can form a double-layer structure of silicone oil-silica on the surface of the fabric, further improving the depth of the fabric. The surface tension, surface energy and rotational potential energy of the siloxane chain segment in the specific silicone oil emulsion are low, thereby reducing the dynamic and static friction coefficients between fibers, and then producing soft and smooth hand feeling. Under the condition of high temperature setting, the silica particles are crosslinked into a network structure through alkoxy, and the silica particles and silicone oil are combined through hydrogen bond, so that the fastness performance of the fabric is improved to a certain extent, the dry rubbing fastness reaches level 4, and the wet rubbing fastness reaches level 4-5. The dry rubbing fastness of the traditional two-stage process is level 3, and the wet rubbing fastness is level 4-5.

[0028] Further, by combining specific silica sol and amino silicone oil emulsion, the hydroxyl groups on the surface of the silica sol are arranged outside, the fabric has good moisture absorption performance, and the antistatic performance is also improved compared with the original two-stage process, from level C to level B. DETAILED DESCRIPTION

[0029] The technical solutions of the present application are further specifically described below through examples.

[0030] The following example describes a polyurethane modified silicone softener, a preparation method thereof and an application thereof in textile fabric. If not specified, the parts in the example are weight parts.

[0031] Example 1: A deepening agent for fabric and its application, which is carried out according to the following method:

[0032] (1) Select silica sol with a mass fraction of 26% of silicon dioxide and an average particle size of 50 nm, adjust the PH to be between 7-10, and the total amount is 500 g.

[0033] (2) Select amino value 0.6, viscosity 9200 mpa, s of amino silicone oil crude isomerized decanol polyoxyethylene ether emulsifier emulsified, wherein the amino silicone oil: emulsifier ratio of 6:1, get silicone oil emulsion, silicone oil content 34%, emulsion particle size is 110 nm, a total of 500 g.

[0034] (3) In the open stirring reaction kettle, first add the emulsified amino silicone oil emulsion, then add the selected specification of silica sol, at 60 r / min, stirring 40 min to get example 1.

[0035] Example 2: a fabric deepening agent and application, according to the following method:

[0036] (1) Select the silica sol with a mass fraction of 30% and an average particle size of 60 nm, adjust the PH to 7-10, a total of 250 g.

[0037] (2) Select amino value 0.5, viscosity 1500 mpa, s of amino silicone oil crude isomerized tridecanol polyoxyethylene ether emulsifier emulsified, wherein the amino silicone oil: emulsifier ratio of 8:1, get silicone oil emulsion, silicone oil content 22%, emulsion particle size is 450 nm, a total of 750 g.

[0038] (3) In the open stirring reaction kettle, first add the emulsified amino silicone oil emulsion, then add the selected specification of silica sol, at 60 r / min, stirring 40 min to get example 2.

[0039] Example 3: a fabric deepening agent and application, according to the following method:

[0040] (1) Select the silica sol with a mass fraction of 35% and an average particle size of 70 nm, adjust the PH to 7-10, a total of 200 g.

[0041] (2) Select amino value 0.3, viscosity 2040 mpa, s of amino silicone oil crude isomerized tridecanol polyoxyethylene ether and isomerized decanol polyoxyethylene ether emulsifier emulsified, wherein the amino silicone oil: emulsifier ratio of 8:1, get silicone oil emulsion, silicone oil content 41%, emulsion particle size is 199 nm, a total of 800 g.

[0042] (3) In the open stirring reaction kettle, first add the emulsified amino silicone oil emulsion, then add the selected specification of silica sol, at 60 r / min, stirring 40 min to get example 3.

[0043] Example 4: a fabric deepening agent and application, according to the following method:

[0044] (1) Select the silicon dioxide mass fraction of 27%, the average particle size of 90 nm of silica sol, adjust PH between 7-10, total 180g.

[0045] (2) Select the amino value of 0.2, viscosity of 5045 mpa, s of amino silicone oil crude oil with lauryl alcohol polyoxyethylene ether as emulsifier for emulsification, wherein the ratio of amino silicone oil: emulsifier is 9:1, to obtain silicone oil emulsion, silicone oil content 34%, emulsion particle size is 244 nm, total 900g.

[0046] (3) In the open stirring reaction kettle, first add the emulsified amino silicone oil emulsion, then add the selected specification of silica sol, stir at 60r / min for 40min to obtain example 4.

[0047] Comparative example 5-12

[0048] The above is the implementation case with better comprehensive effect, and the key substance characteristics of the remaining examples are listed in the form of a table as shown in the following table:

[0049] Table 1: Component conditions and amount of deepening agent

[0050]

[0051]

[0052] Application evaluation method:

[0053] ○ Evaluation project using equipment evaluation standard comparative example

[0054] (1) Evaluation project: deepening performance: L, a, b, WSUM value; hand feeling; yellowing; antistatic performance; fastness;

[0055] (2) Use equipment: x-rite Color I 5D colorimeter (Hangzhou Sanjin Instrument and Equipment Co., Ltd.)

[0056] Roller PB (Xiamen Ruibi Precision Instrument Co., Ltd.)

[0057] Tenter (Ruibi Dyeing Test Machine Co., Ltd.)

[0058] Balance BL-2200H (Japan Shimadzu Corporation)

[0059] Treated fabric: Arab black polyester woven fabric

[0060] Y571B type friction color fastness instrument (Ningbo Textile Instrument Factory)

[0061] YG(B)342E type fabric inductive static tester (Wenzhou Darong Textile Instrument Co., Ltd.)

[0062] x-rite Color I 5D colorimeter

[0063] Note: x-rite Color I 5D colorimeter depth test value introduction:

[0064] L* value represents the lightness of the color of the fabric, the larger the L* value, the lighter the color. The smaller the L* value, the darker the color.

[0065] a* value represents the range of fabric color from red to green, the larger the a*, the more it deviates to red, the smaller the a*, the more it deviates to green.

[0066] b* value represents the range of fabric color from yellow to blue, the larger the b*, the more it deviates to yellow, the smaller the b*, the more it deviates to blue.

[0067] WSUM value represents the apparent color depth of the fabric, the larger the WSUM value, the deeper the color of the treated fabric. Different from the traditional Kubelka-Munk function value (K / S) to represent the depth (the test K / S value method only considers the absorption and scattering at the maximum absorption wavelength, which has certain limitations). The WSUM value considers the absorption and scattering characteristics of the object in the entire visible light spectrum by integration, and takes into account the factors of light source and human eye vision, which is in good agreement with the evaluation of the human eye, and in principle, it is suitable for comparison in all cases.

[0068] (3) Evaluation criteria:

[0069] Friction fastness test method GB / T 29865-2013

[0070] Deepening effect calculation method: (WSUM value-100) / 100*100%

[0071] Antistatic property evaluation method (GB / T 33728-2017)

[0072] Yellowing test method: ISO 105-X18:2007

[0073] (4) Comparative example:

[0074] Comparative example 1 is a commonly used acrylic deepening agent on the market;

[0075] Comparative example 2 is a commonly used silicone oil deepening agent on the market;

[0076] Comparative example 3 is the most common two-stage deepening processing method, one-stage acrylic deepening agent + two-stage silicone oil deepening agent;

[0077] Comparative example 4 is a silica sol dispersion liquid on the market.

[0078] Preliminary screening of examples:

[0079] (1) Observe the product stability of different embodiments, and confirm whether delamination and oil floating will occur or not.

[0080] (2) The product 1-12 of the embodiment is treated on black polyester fabric by padding at a dosage of 5% owf, a temperature of 150°C, and a setting time of 1 min, and the fabric depth, yellowing, and hand feeling are evaluated.

[0081] Table 2: preliminary evaluation results of different embodiments

[0082]

[0083]

[0084] Note: o, the performance is not a problem, and x, the performance has defects.

[0085] Further evaluation experiments are carried out on preferred embodiments 1, 2, 3, and 4 according to the results in Table 2.

[0086] Application Example 1

[0087] Actual deepening processing operation process (I)

[0088] (1) Take black polyester fabric with a size of 30x20 cm, and take the deepening agent in embodiments 1, 2, 3, and 4 for experiments, and compare the depth color light of comparative examples 1, 2, 3, and 4 to determine the deepening effect of the application.

[0089] (2) The auxiliaries in different embodiments and comparative examples are treated on the fabric by padding, and the dosage is 5% owf, one dip and one pad. The padded fabric sample is set by a tenter setting machine at a setting temperature of 150°C and a setting time of 1 min.

[0090] (3) After completion, when the fabric sample temperature is stable to room temperature, the deepening effect of the fabric sample is tested by an X-rite Color 15D colorimeter. The fastness of the finished fabric is tested by a rubbing fastness instrument, and the antistatic performance is tested by an electrostatic tester.

[0091] The deepening effect and comprehensive performance of black polyester fabric of embodiments 1-4 and comparative examples 1-4 are shown in Table 3.

[0092] Table 3: deepening effect of the application at a dosage of 5% owf auxiliaries and a setting temperature of 150°C.

[0093]

[0094] Application Example 2

[0095] Actual deepening processing operation process (II)

[0096] (1) Take the black Arab polyester fabric size 30x20cm, take the deepening agent in the above-mentioned examples 1, examples 2, examples 3, examples 4 to carry out the experiment, and compare the depth of color of comparative example 1, comparative example 2, comparative example 3, comparative example 4, to determine the deepening effect of the application.

[0097] (2) The auxiliary agent of different examples and comparative examples is treated on the fabric by padding, the usage is 3%owf, one dip and one pad. The padded fabric sample is treated by tentering setting machine, the setting temperature is 130℃, and the setting time is 1min.

[0098] (3) After completion, when the temperature of the fabric sample is stable to room temperature, the deepening effect of the fabric sample is tested by X-rite Color 15D colorimeter. The rubbing fastness instrument tests the fastness of the finished fabric, and the static tester tests the antistatic performance.

[0099] The deepening effect of the black Arab polyester fabric of examples 1-4 and comparative examples 1-4 is shown in table 4.

[0100]

[0101] Table 4: 3%owf auxiliary agent dosage, 130℃ setting temperature, deepening effect of the application.

[0102] According to table 3 and table 4, the results show that the application (example 1, example 2, example 3, example 4) is deeper than the existing two deepening processing (comparative example 3), the depth is improved by more than 60%, the fastness and antistatic performance are better than the existing two deepening process level, which exceeds the existing one deepening agent (comparative example 1, comparative example 2, comparative example 4) on the market, so the application can greatly optimize the existing deepening processing procedure, improve the production efficiency and reduce the energy consumption.

[0103] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a…" does not exclude the presence of additional identical elements in the process, method, article or equipment including the element.

Claims

1. A fabric darkening agent, characterized in that: It includes silica sol and silicone oil emulsion, and the mass ratio of the silica sol: silicone oil emulsion is 1:1 to 1:5; The silica sol has a silica mass fraction of 25-40%, an average particle size of 40-110 nm, and a pH value of 7-10; The silicone oil is amino silicone oil, contained in an amino silicone oil emulsion system, the ratio of amino silicone oil to emulsifier in the system is 5:1 to 10:1, the solid content of the amino silicone oil is 10% to 50%, and the particle size of the silicone oil emulsion is 100 to 500 nm; The amino silicone oil in the silicone oil emulsion has an ammonia value of 0.2 to 0.7 and a viscosity of 1000 to 15000 mPa.s.

2. A fabric darkening agent according to claim 1, characterized in that: The emulsifier in the silicone oil emulsion includes one or more non-ionic surfactants.

3. A fabric darkening agent according to claim 1, characterized in that The preparation is carried out as follows: first add the emulsified amino silicone oil emulsion into a stirring reactor, then add the silica sol of the selected specifications, and stir at 60r / min for 40min to obtain the darkening agent.

4. An application of a fabric darkening agent according to claim 1, characterized in that: include: For processing polyester Arabic black fabric; or, Used for deepening processing of cotton and nylon fabrics.

5. The use of a fabric darkening agent according to claim 4, characterized in that: For the processing of polyester Arabic black fabric, follow the steps below: (1) When using the fabric darkening agent according to claim 1, the amount of the treatment liquid is controlled at 3.2% owf to 8% owf and the pH is controlled between 7 and 10. (2) Set the parameters: the speed of the forming machine is 25-90m / min, and the forming temperature is 130-180℃.

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