Wax emulsion with spinnability, hand feeling, stability and no layer difference as well as preparation method and application of wax emulsion

Abstract

The invention relates to the technical field of wax emulsions for yarn weaving, in particular to a wax emulsion which has spinnability, hand feeling and stability and is free of layer difference and a preparation method and application of the wax emulsion. The wax emulsion comprises a component A and a component B, wherein the component A is selected from two or more of oxidized modified polyethylene wax, fatty alcohol-polyoxyethylene ether and paraffin; the component B is prepared from the following components in percentage by weight: 2.5 to 5 percent of a cationic surfactant, 2.5 to 5 percent of a nonionic surfactant, 0.1 to 0.5 percent of an antibacterial agent, 0.5 to 1 percent of a pH regulator and the balance of water. The wax emulsion provided by the invention has excellent lubricating effect, softening effect and permeation effect, has no middle-outer layer difference and excellent stability, and does not influence the color light and fastness of a dyed fabric.

Description

Technical Field

[0001] The invention relates to the technical field of wax emulsions for yarn weaving, and in particular to a wax emulsion having spinnability, hand feel, stability and no layer difference, and a preparation method and application thereof. Background Art

[0002] At present, the mainstream wax emulsion on the market has no hand feel and is unevenly applied during processing. It cannot completely cover the yarn, has a poor effect in protecting the yarn strength, has a high friction coefficient on the yarn surface, a high yarn breakage rate, and is prone to producing a large number of flight feathers. It is not easy to repair and is prone to problems with the inner and outer layers. Therefore, it is extremely difficult to prepare wax emulsions that meet the needs of high-end yarn weaving.

[0003] Among all kinds of textile waxes, ordinary paraffin products have excellent lubrication properties and high cost performance, but they have problems such as poor hydrophilicity, no hand feel, and no effect on improving yarn strength. The introduction of reactive oxidized polyethylene segments in water-based polyethylene wax can improve yarn strength and improve the lubrication properties of the yarn surface, thereby reducing the yarn breakage rate and friction coefficient during weaving and improving production efficiency. However, polyethylene wax derivatives are organic emulsions and can corrupt themselves. Under the combined action of decay fungi and molds, they will produce odors and rancidity, accompanied by blackening, precipitation, flocculation, agglomeration, etc., which seriously affect production efficiency and fabric quality.

[0004] For example, Chinese patent CN109487560A discloses a composite wax microemulsion composition and its preparation method and application. The composite wax microemulsion composition contains: 8-28 wt% of high melting point oxidized polyethylene wax, 4-14 wt% of low melting point wax, 1-3 wt% of hyperbranched Gemini surfactant, 0.5-3 wt% of hyperbranched softener, 3-13 wt% of emulsifier, 0.1-1 wt% of sodium hydroxide or potassium hydroxide, and 50-80 wt% of water, based on the total weight of the composite wax microemulsion. The composite wax microemulsion can be prepared by a one-step high temperature emulsification method, and the process is simple. The prepared composite wax microemulsion has good centrifugal stability and dilution stability. When it is used to finish textiles, the smoothness of the textiles can be significantly improved, the dynamic friction coefficient of the yarn can be reduced, the sewing performance and hydrophilicity of the knitted fabric can be improved, and yellowing can be reduced. However, the difference between the inner, middle and outer layers of the yarn has not been studied, and only the centrifugal stability and dilution stability of the emulsion have been studied, and its stability in harsh environments has not been studied. Centrifugal stability and dilution stability tests are usually conducted under specific conditions and may not fully simulate the complex environment in actual applications, such as stability under high temperature shear, stability under high temperature, stability under salt-alkali co-bath, etc., which are crucial for predicting the long-term stability and reliability of the product.

[0005] For example, Chinese patent CN111979802A discloses a wax emulsion for yarn dyeing, which includes (1) 43-58 parts of high-temperature oxidized polyethylene wax; (2) 33-40 parts of paraffin wax; (3) 15-24 parts of fatty alcohol polyoxyethylene ether; (4) 12-20 parts of fatty amine polyoxyethylene ether; (5) 5-10 parts of Tween; (6) 5-10 parts of fatty acid monoethanolamide; (7) 510 parts of fatty acid diethanolamide; (8) 3-6 parts of water; (9) 1-3 parts of defoaming agent; and its preparation method includes: (1) adding all the above raw materials to a reaction device and reacting at high temperature and high pressure for 3-5 hours, with the temperature controlled at 140-170°C and the pressure controlled at 3-5MPa; (2) cooling naturally. Although the invention is environmentally friendly, has high hydrophilicity and good smoothness. However, the invention has not conducted any effect experiments, and the description of high hydrophilicity and good smoothness is slightly pale, and it does not mention a solution to the problem of inner, middle and outer layer differences.

[0006] Therefore, there is an urgent need to develop a wax emulsion with high spinnability, high hand feel, no layer difference and good stability under various complex environments. Summary of the invention

[0007] Based on the deficiencies of the prior art, the present invention aims to provide a wax emulsion having spinnability, hand feel, stability and no layer difference, and a preparation method and application thereof. The wax emulsion obtained by using the wax emulsion of the present invention and the preparation method has an excellent lubricating effect, can effectively improve the weavability of the yarn, thereby improving production efficiency, has little effect on hydrophilicity, has good skin-friendliness and comfort of the treated fabric, and has basically no problem of inner, middle and outer layer difference of the yarn after treatment, and has excellent stability under different environments, which can well solve the problems existing in the prior art.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] On the one hand, the present invention provides a wax emulsion having spinnability, hand feel, stability and no layer difference, wherein the wax emulsion comprises component A and component B, wherein component A is selected from two or more of oxidized modified polyethylene wax, fatty alcohol polyoxyethylene ether and paraffin wax; and component B comprises the following components by weight: 2.5-5% cationic surfactant, 2.5-5% nonionic surfactant, 0.1-0.5% antibacterial agent, 0.5-1% pH regulator and balance water.

[0010] Preferably, the component A is oxidatively modified polyethylene wax and fatty alcohol polyoxyethylene ether; the mass ratio of the oxidatively modified polyethylene wax to the fatty alcohol polyoxyethylene ether is 4:1-2.

[0011] More preferably, the ingredients of the wax emulsion include the following components by weight: 40% oxidatively modified polyethylene wax, 10-20% fatty alcohol polyoxyethylene ether, 2.5-5% cationic surfactant, 2.5-5% nonionic surfactant, 0.1-0.5% antibacterial / bacteriostatic agent, 0.5-1% pH regulator and 28.5-44.4% water.

[0012] Preferably, the component A is oxidatively modified polyethylene wax and paraffin wax; the mass ratio of the oxidatively modified polyethylene wax to the paraffin wax is 1:1-2.

[0013] More preferably, the wax emulsion comprises the following components by weight: 20% oxidatively modified polyethylene wax, 20-40% paraffin, 2.5-5% cationic surfactant, 2.5-5% nonionic surfactant, 0.1-0.5% antibacterial / bacteriostatic agent, 0.5-1% pH regulator and 28.5-54.4% water.

[0014] Preferably, the component A is paraffin and fatty alcohol polyoxyethylene ether; the mass ratio of the paraffin and fatty alcohol polyoxyethylene ether is 3:1-2.

[0015] More preferably, the wax emulsion comprises the following components by weight: 30% paraffin, 10-20% fatty alcohol polyoxyethylene ether, 2.5-5% cationic surfactant, 2.5-5% nonionic surfactant, 0.1-0.5% antibacterial / bacteriostatic agent, 0.5-1% pH regulator and 38.5-54.4% water.

[0016] Preferably, the cationic surfactant is selected from one of a quaternary ammonium salt and a heterocycle.

[0017] More preferably, the cationic surfactant is selected from octadecyltrimethylammonium chloride.

[0018] Preferably, the nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, polyol polyoxyethylene ether fatty acid ester, alkyl alcohol amide, alkyl amine oxide, and N-alkyl pyrrolidone.

[0019] More preferably, the nonionic surfactant is selected from fatty alcohol polyoxyethylene ether.

[0020] Preferably, the antibacterial agent is selected from one or more of guanidine salt antibacterial polymers, polyhexamethylene biguanide salts, and polyhexamethylene guanidine salts.

[0021] More preferably, the antibacterial agent is selected from polyhexamethylene biguanide salts.

[0022] Preferably, the pH adjuster is an organic or inorganic alkaline substance.

[0023] More preferably, the pH adjuster is an inorganic alkaline substance.

[0024] On the other hand, the present invention provides a method for preparing the wax emulsion, comprising the following steps: weighing ingredient A and ingredient B in the prescribed amount, heating and melting, emulsifying and stirring to obtain the wax emulsion.

[0025] In another aspect, the present invention provides the use of the wax emulsion in yarn weaving.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The present invention has an excellent lubricating effect, can effectively reduce the friction coefficient of the yarn surface, reduce yarn breakage, and improve the weaving performance of the yarn, thereby improving production efficiency;

[0028] (2) The present invention has an excellent softening effect, can give the yarn a certain softness and smooth feel, and can reduce the amount of softener used;

[0029] (3) The present invention has an excellent penetration effect and can effectively avoid the problem of inner, middle and outer layer differences;

[0030] (4) The present invention has excellent stability and can effectively avoid the stability problem when waxing the cylinder;

[0031] (5) The present invention will not affect the color shade and fastness of dyed fabrics. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to specific embodiments.

[0033] Example 1 A wax emulsion having both spinnability, hand feel, stability and no layer difference

[0034] The wax emulsion has the following components by weight: 40% oxidatively modified polyethylene wax, 15% fatty alcohol polyoxyethylene ether, 4% cationic surfactant, 3% nonionic surfactant, 0.3% antibacterial / antibacterial agent, 0.8% pH adjuster (organic, inorganic alkaline substances) and the balance water.

[0035] Among them, the cationic surfactant is octadecyltrimethylammonium chloride, the nonionic surfactant is fatty alcohol polyoxyethylene ether, the antibacterial agent is polyhexamethylene biguanide salt, and the pH regulator is sodium hydroxide.

[0036] A method for preparing wax emulsion

[0037] The specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify it at a speed of 90r / min for 30 minutes, and then cool it with tap water in the built-in coil while reducing the stirring speed until the temperature drops to 60°C to obtain the wax emulsion.

[0038] Example 2 A wax emulsion having both spinnability, hand feel, stability and no layer difference

[0039] The wax emulsion has the following components by weight: 40% oxidatively modified polyethylene wax, 10% fatty alcohol polyoxyethylene ether, 2.5% cationic surfactant, 2.5% nonionic surfactant, 0.1% antibacterial agent, 0.5-1% pH regulator, and 44.4% water.

[0040] The cationic surfactant is dialkyl dimethyl ammonium salt, the nonionic surfactant is fatty alcohol polyoxyethylene ether, the antibacterial agent is polyhexamethylene biguanide hydrochloride, and the pH regulator is pyridine.

[0041] A method for preparing wax emulsion

[0042] The specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify it at a speed of 90r / min for 30 minutes, and then cool it with tap water in the built-in coil while reducing the stirring speed until the temperature drops to 60°C to obtain the wax emulsion.

[0043] Example 3 A wax emulsion having both spinnability, hand feel, stability and no layer difference

[0044] The wax emulsion has the following components by weight: 40% oxidatively modified polyethylene wax, 20% fatty alcohol polyoxyethylene ether, 5% cationic surfactant, 5% nonionic surfactant, 0.5% antibacterial agent, 1% pH regulator, and 28.5% water.

[0045] The cationic surfactant is imidazoline, the nonionic surfactant is alkylphenol polyoxyethylene ether, the antibacterial agent is polyhexamethyleneguanidine hydrochloride, and the pH regulator is indole.

[0046] A method for preparing wax emulsion

[0047] The specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify at a speed of 90r / min for 30 minutes, then cool it with tap water in the built-in coil and reduce the stirring speed until the temperature drops to 60°C to obtain the wax emulsion.

[0048] Example 4 A wax emulsion having both spinnability, hand feel, stability and no layer difference

[0049] The wax emulsion has the following components by weight: 20% oxidatively modified polyethylene wax, 20% paraffin, 2.5% cationic surfactant, 2.5% nonionic surfactant, 0.1% antibacterial / bacteriostatic agent, 0.5% pH regulator and 54.4% water.

[0050] Among them, the cationic surfactant is a pyridine ring, the nonionic surfactant is a polyol polyoxyethylene ether fatty acid ester, the antibacterial agent is polyhexamethylene biguanide salt, and the pH regulator is sodium hydroxide.

[0051] A method for preparing wax emulsion

[0052] The specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify it at a speed of 90r / min for 30 minutes, and then cool it with tap water in the built-in coil while reducing the stirring speed until the temperature drops to 60°C to obtain the wax emulsion.

[0053] Example 5 A wax emulsion having both spinnability, hand feel, stability and no layer difference

[0054] The wax emulsion has the following components by weight: 20% oxidatively modified polyethylene wax, 40% paraffin wax, 5% cationic surfactant, 5% nonionic surfactant, 0.5% antibacterial / bacteriostatic agent, 1% pH regulator and 28.5% water.

[0055] The cationic surfactant is imidazoline, the nonionic surfactant is alkyl alcohol amide, the antibacterial agent is polyhexamethylene guanidine salt, and the pH regulator is sodium hydroxide.

[0056] A method for preparing wax emulsion

[0057] The specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify at a speed of 90r / min for 30 minutes, then cool it with tap water in the built-in coil and reduce the stirring speed until the temperature drops to 60°C to obtain the wax emulsion.

[0058] Example 6 A wax emulsion having both spinnability, hand feel, stability and no layer difference

[0059] The wax emulsion has the following components by weight: 30% paraffin, 10% fatty alcohol polyoxyethylene ether, 2.5% cationic surfactant, 2.5% nonionic surfactant, 0.1% antibacterial / bacteriostatic agent, 0.5% pH regulator and 54.4% water.

[0060] The cationic surfactant is a pyridine ring, the nonionic surfactant is an alkylamine oxide, the antibacterial agent is polyhexamethylene biguanide hydrochloride, and the pH regulator is sodium hydroxide.

[0061] A method for preparing wax emulsion

[0062] The specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify it at a speed of 90r / min for 30 minutes, and then cool it with tap water in the built-in coil while reducing the stirring speed until the temperature drops to 60°C to obtain the wax emulsion.

[0063] Example 7 A wax emulsion having both spinnability, hand feel, stability and no layer difference

[0064] The wax emulsion has the following components by weight: 30% paraffin, 20% fatty alcohol polyoxyethylene ether, 5% cationic surfactant, 5% nonionic surfactant, 0.5% antibacterial / bacteriostatic agent, 1% pH regulator and 38.5% water.

[0065] The cationic surfactant is a pyridine ring, the nonionic surfactant is an N-alkyl pyrrolidone, the antibacterial agent is polyhexamethylene biguanide hydrochloride, and the pH regulator is sodium hydroxide.

[0066] A method for preparing wax emulsion

[0067] The specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify it at a speed of 90r / min for 30 minutes, and then cool it with tap water in the built-in coil while reducing the stirring speed until the temperature drops to 60°C to obtain the wax emulsion.

[0068] Comparative Example 1

[0069] A representative wax emulsion on the market, product company name: Rudolf Chemical Co., Ltd., product name: yarn lubricant RUCO-FIL AWS NEW, effective content 44%.

[0070] Comparative Example 2

[0071] The second representative wax emulsion on the market, product company name: Runhe New Materials Co., Ltd., product name: Runhe wax emulsion COW, effective content 41%.

[0072] Comparative Example 3

[0073] The only difference from Example 1 is that the oxidized modified polyethylene wax is replaced by Fischer-Tropsch wax, and the other components and contents are the same.

[0074] A method for preparing wax emulsion

[0075] The specific steps are as follows: the specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify it at a speed of 90r / min for 30 minutes, and then cool it with tap water in the built-in coil, and reduce the stirring speed at the same time until the temperature drops to 60°C to obtain the wax emulsion.

[0076] Comparative Example 4

[0077] The only difference from Example 3 is that paraffin is replaced by beeswax, and the other components and contents are the same.

[0078] A method for preparing wax emulsion

[0079] The specific steps are as follows: the specific steps are as follows: add all the components A and B into the reactor and heat it to 120°C, emulsify it at a speed of 90r / min for 30 minutes, and then cool it with tap water in the built-in coil, and reduce the stirring speed at the same time until the temperature drops to 60°C to obtain the wax emulsion.

[0080] Effect Experiment

[0081] Experiment 1: Spinnability effect, inner, middle and outer layer difference and hand feel of different wax emulsions

[0082] Experimental methods:

[0083] Formula: wax emulsion 2% (owf); fabric: 32 single cotton yarn; the bath ratio of wax emulsion to fabric is: 1:10.

[0084] Process: 60℃×30min dipping treatment → yarn dehydration machine dehydration (2000r / min*5min) → drying (80℃*12h) → evaluation of hand feel, spinnability, and difference between inner, middle and outer layers.

[0085] The effect evaluation of the wax emulsions of Examples 1-7 and Comparative Examples 1-4 is shown in Table 1 below.

[0086] Table 1: Evaluation table of yarn spinnability after treatment with different wax emulsions

[0087]

[0088]

[0089] Note: Evaluation parameters: ① Number of broken ends / 100cm: the number of yarn broken ends on a 100cm long sock; ② Number of machine stoppages due to thread breakage: the number of machine stoppages due to thread breakage during the weaving process.

[0090] It can be seen from the above table that the wax emulsion within the protection scope of the present invention has less cloth breakage and less thread breakage and shutdown times, and has an excellent spinnability improvement effect, which is better than the comparative example.

[0091] Table 2: Test table of inner, middle and outer layer differences of yarn after treatment with different wax emulsions

[0092]

[0093] Note: Evaluation parameter description: The larger the total color difference between the inner, middle and outer layers, the greater the difference between the inner, middle and outer layers.

[0094] It can be seen from the above table that after the yarn is treated with the wax emulsion of the embodiment, the difference between the inner, middle and outer layers is small, while the difference between the inner, middle and outer layers of the comparative example is large, which shows that the wax emulsion prepared by the combination of the components described in the present invention will have a good effect.

[0095] Table 3: Hand feel performance test table after treatment with different wax emulsions

[0096]

[0097]

[0098] Note: Evaluation parameter description: The score is based on a 100-point system and is given by professionals who evaluate the feel. The higher the score, the better the feel, and the lower the score, the worse the feel.

[0099] As can be seen from the above table, the embodiments have excellent lubricity and softness. Although the softness of the representative wax emulsion 2 on the market is better than that of some embodiments, its lubricity is not as good as that of the embodiments. As can be seen from Comparative Examples 3 and 4, the wax emulsion made from component A protected by the present invention has good hand feel, and one of the components cannot be replaced.

[0100] Experiment 2 Effect of different wax emulsions on yarn fastness

[0101] Experimental methods

[0102] Formula: wax emulsion 2% (owf); fabric: 32 single cotton yarn; bath ratio of wax emulsion to fabric: 1:10.

[0103] Process: 60℃×30min dipping treatment → yarn dehydration machine dehydration (2000r / min*5min) → drying (80℃*12h) → test GB / T3921-2008 "Textiles Color Fastness Test Color Fastness to Soaping"

[0104] Table 4: Color fastness test of yarn after treatment with different wax emulsions

[0105]

[0106]

[0107] Note: Evaluation parameter description: The evaluation is based on the test GB / T3921-2008 "Textiles - Tests for Colour Fastness - Colour Fastness to Soaping". The higher the evaluation level, the better the colour fastness.

[0108] It can be seen from the above table that the soap fastness of the yarn treated with the example is slightly reduced, which is better than that of the representative wax emulsion on the market and comparative examples 3 and 4.

[0109] Experiment 3 Stability test of wax emulsion under different conditions

[0110] Formula: wax emulsion 20g / L, other conditions are shown in the table;

[0111] Table 5: Stability test table of different wax emulsions under different conditions

[0112]

[0113]

[0114] Note: Description of evaluation parameters: ① High temperature shear stability: 20g / L working solution, temperature is 70℃, speed is 2000rpm / min, insulation is stable for 30min, and it is stable after standing for 7d; ② High temperature stability: 20g / LV working solution, boiled for 10min at 100℃, and it is stable after standing for 7d; ③ Salt and alkali resistance stability: 20g / L working solution, co-bathed with 10g / L sodium sulfate + 2.5g / L soda ash, and it is stable after standing for 7d; ④ Reactive dye co-bath stability: 20g / L working solution, co-bathed with 1g / L reactive dye, and it is stable after standing for 7d.

[0115] It can be seen from the above table that the wax emulsions of the embodiments of the present invention have excellent stability, while the representative wax emulsions on the market and comparative examples 3 and 4 are unstable.

[0116] In summary, the performance of the wax emulsion composed of the components limited by the present invention is better than that of the representative wax emulsion on the market, and component A cannot be replaced.

[0117] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wax emulsion having spinnability, hand feel, stability and no layer difference, characterized in that: The wax emulsion comprises component A and component B, wherein the component A is selected from two or more of oxidized modified polyethylene wax, fatty alcohol polyoxyethylene ether and paraffin; the component B comprises the following components by weight: 2.5-5% cationic surfactant, 2.5-5% nonionic surfactant, 0.1-0.5% antibacterial agent, 0.5-1% pH regulator and balance water.

2. The wax emulsion according to claim 1, characterized in that The component A is oxidatively modified polyethylene wax and fatty alcohol polyoxyethylene ether; the mass ratio of the oxidatively modified polyethylene wax to the fatty alcohol polyoxyethylene ether is 4:1-2.

3. The wax emulsion according to claim 1, characterized in that The component A is oxidized modified polyethylene wax and paraffin wax; the mass ratio of the oxidized modified polyethylene wax to the paraffin wax is 1:1-2.

4. The wax emulsion according to claim 1, characterized in that The component A is paraffin and fatty alcohol polyoxyethylene ether; the mass ratio of the paraffin and fatty alcohol polyoxyethylene ether is 3:1-2.

5. The wax emulsion according to claim 1, characterized in that The cationic surfactant is selected from one of quaternary ammonium salts and heterocycles.

6. The wax emulsion according to claim 1, characterized in that The nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, polyol polyoxyethylene ether fatty acid ester, alkyl alcohol amide, alkyl amine oxide, and N-alkyl pyrrolidone.

7. The wax emulsion according to claim 1, characterized in that The antibacterial agent is selected from one or more of guanidine salt antibacterial polymers, polyhexamethylene biguanide salts, and polyhexamethylene guanidine salts.

8. The wax emulsion according to claim 1, characterized in that The pH regulator is an organic or inorganic alkaline substance.

9. The method for preparing the wax emulsion according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: weighing the ingredients A and B in the formula amount, heating and melting, emulsifying and stirring to obtain the wax emulsion.

10. Use of the wax emulsion according to any one of claims 1 to 8 or the wax emulsion obtained by the preparation method according to claim 9 in yarn weaving.

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