High-efficiency environment-friendly ultra-high molecular weight polyethylene fiber dyeing process

Abstract

The invention discloses an efficient and environment-friendly dyeing process for ultra-high molecular weight polyethylene fibers, and relates to the technical field of textile material dyeing, pretreatment operation is needed when the polyethylene fibers are dyed, and the pretreatment operation comprises cleaning of the ultra-high molecular weight polyethylene fibers and treatment of a dyeing agent. The main components for preparing the dyeing agent comprise a disperse dye, an initiator, a reactive diluent, a buffer agent, an antistatic agent and a dye assistant.The method has the advantages that by conducting plasma treatment on the polyethylene fibers, the dyeing performance of the polyethylene fibers can be remarkably improved, the dye can permeate and adhere more easily, and the dyeing effect is better; according to the present invention, the dyeing agent is added to the polyethylene fiber, such that the brighter and lasting color can be obtained, the overall performance of the polyethylene fiber can be enhanced, the dyeing step of the polyethylene fiber material can be environmentally friendly and safe by using the Di-VS as the disperse dye for preparing the dyeing agent, and the Di-VS has characteristics of good dyeing property and good color fastness.

Description

Technical Field

[0001] The invention relates to the technical field of textile material dyeing, in particular to a dyeing process for high-efficiency and environment-friendly ultra-high molecular weight polyethylene fibers. Background Art

[0002] Ultra-high molecular weight polyethylene fiber (UHMWPE), also known as high-strength and high-modulus polyethylene fiber, is widely used in aerospace, military machinery, transportation, sports equipment and other fields as a special fiber and high-performance fiber due to its excellent mechanical properties, stable chemical properties and ideal mechanical properties. However, due to its high relative molecular weight, polyethylene has a high degree of orientation, regular molecular arrangement, high crystallinity, and is difficult to dye. At present, there are two main conventional methods, one is to add dyeing masterbatch, and the other is to modify it. The method of adding masterbatch is to add the masterbatch to the slice. , and then melt spinning. This method can dye the fiber, but the compatibility between the masterbatch and the slice is poor, the rheology and spinnability of the melt are not good, and the introduction of the masterbatch leads to the destruction of the internal structure of the fiber obtained in the subsequent production, and the fiber strength is greatly reduced, and its high strength advantage cannot be brought into play. In addition, this production process has poor flexibility and it is troublesome to replace various colored silk varieties, so it cannot be applied on a large scale. Modification methods are used, such as dyeing under supercritical conditions, but the reaction conditions are harsh, and slight differences in temperature or pressure will affect the dyeing of the final product, so it cannot be applied on a large scale;

[0003] Ultra-high molecular weight polyethylene fiber has been widely used in many fields due to its excellent performance. However, due to the particularity of its chemical structure, effective dyeing has always been a difficult problem in the industry. Traditional dyeing methods often make it difficult for the dye to fully penetrate and evenly adhere to the fiber, resulting in poor dyeing effect, insufficient color brightness and durability, and color fastness that is difficult to meet actual needs.

[0004] In the dyeing process, it is very important to choose the right dye. Many common disperse dyes not only have limited dyeing performance, but also may have environmental and safety issues. In addition, the imperfection of dyeing process will also affect the dyeing quality and efficiency. For example, the lack of effective pre-treatment operation may lead to impurities and oil residues on the fiber surface, affecting the adsorption and penetration of dyes. The unreasonable formula of dyes may lead to uneven dyeing and low dyeing rate. Improper post-dyeing treatment may affect the color fastness and fiber performance.

[0005] At the same time, with the increasingly stringent environmental protection requirements and the continuous improvement of people's requirements for product quality, it is imperative to develop an ultra-high molecular weight polyethylene fiber dyeing process that is efficient, environmentally friendly and can ensure dyeing quality. It is necessary not only to improve the dyeing effect and fastness, but also to reduce the impact on the environment, reduce energy consumption, and ensure the safety of operators. To this end, we propose an efficient and environmentally friendly ultra-high molecular weight polyethylene fiber dyeing process. Summary of the invention

[0006] The purpose of the present invention is to provide a highly efficient and environment-friendly ultra-high molecular weight polyethylene fiber dyeing process.

[0007] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: a dyeing process of an efficient and environmentally friendly ultra-high molecular weight polyethylene fiber, wherein a pre-treatment operation is required when dyeing the polyethylene fiber, including cleaning the ultra-high molecular weight polyethylene fiber and treating the dye, wherein the main components of the dye preparation include disperse dyes, initiators, active diluents, buffers, antistatic agents and dye auxiliaries, and the specific operation method of the dyeing process of the efficient and environmentally friendly ultra-high molecular weight polyethylene fiber is as follows:

[0008] Step 1: pre-treat the ultra-high molecular weight polyethylene fiber, clean the polyethylene fiber with warm water at 45°C, remove grease and dirt on its surface, and clean it with a detergent. After cleaning, place the polyethylene fiber in a plasma treatment chamber and perform plasma treatment under vacuum conditions, using NH3 as the plasma treatment gas;

[0009] Step 2, preparing a dye, placing 100-150 parts of Dispanol C-VS, 2-5 parts of benzoyl peroxide, 1-2 parts of propylene glycol methyl ether acetate, 1-2 parts of acetic acid-sodium acetate buffer, 15-25 parts of fatty alcohol polyoxyethylene ether phosphate potassium salt, 7-15 parts of sodium lignin sulfonate and 12-16 parts of a leveling agent in a stirring container in order, stirring continuously for 30-40 minutes at 20° C.-25° C. to obtain a dye raw material, and detecting the concentration, viscosity and pH value of the dye raw material;

[0010] Step 3: Mix the dye raw material and deionized water in a mass ratio of 1:1-2 to prepare a mixed dye solution, spread the pretreated polyethylene fiber flat, bend it with a wooden stick, and evenly immerse it in the mixed dye solution, raise the temperature to 120°C, and dye it for 10-15 minutes, then lift the polyethylene fiber out of the mixed dye solution, hang it on a bamboo pole and let it stand for 5 minutes, then immerse the polyethylene fiber in the mixed dye solution again, repeat the operation twice, and obtain a semi-finished polyethylene fiber that has been dyed;

[0011] Step 4: After dyeing is completed, the mixed dye solution is quickly discharged and soaked in -5°C-15°C frozen water for 5min-10min. After soaking, it is taken out and washed with water, and then the polyethylene fiber is fixed with water-based polyurethane. After completion, it is dehydrated and dried to obtain the finished polyethylene fiber material.

[0012] As a further solution of the present invention: In the step 1, dispanoside C-VS is relatively stable compared to other disperse dyes, and changes in pH and temperature have little effect on dispanoside C-VS. The prepared dye raw material needs to be stored in a cool, dry and ventilated environment.

[0013] As a further solution of the present invention: in the step 1, the cleaning agent is an alkaline cleaning agent, the cleaning time is 15min-20min, and the vacuum degree in the plasma treatment chamber needs to reach 10 -3 Pa, using NH3 as the plasma treatment gas for 10min-15min, and the treatment power is 100W-200W.

[0014] As a further scheme of the present invention: in the step 2, Dispanso C-VS is a disperse dye, benzoyl peroxide is an initiator, propylene glycol methyl ether acetate is an active diluent, acetic acid-sodium acetate buffer is a buffer, fatty alcohol polyoxyethylene ether phosphate potassium salt is an antistatic agent, and sodium lignin sulfonate is a dye auxiliary.

[0015] As a further solution of the present invention: in the step 2, the leveling agent is one of lauryl alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, sodium dodecylbenzene sulfonate and styrene-maleic anhydride random copolymer.

[0016] As a further solution of the present invention: in the step three, when the polyethylene fiber material is too long, the polyethylene fiber material is wound and tightened with a wooden stick and placed in the mixed dye solution, and the heating rate of the mixed dye solution is 5° C. / min.

[0017] As a further solution of the present invention: in step three, after the dyeing is completed, the mixed dye liquid in the polyethylene fiber needs to be driven out with a wooden stick, and then the polyethylene fiber is hung on a bamboo pole, and the height of the polyethylene fiber from the ground is 35cm-40cm.

[0018] As a further solution of the present invention: in the step 4, after soaking in frozen water, let it stand for 10 minutes, and then use warm water at 25℃-40℃ to wash the polyethylene fiber three times. When washing, pinch the two corners of the polyethylene fiber in the same direction, drag it back and forth in the warm water to wash, and avoid rubbing and twisting when washing.

[0019] As a further solution of the present invention: in the step 4, after the polyethylene fiber is cleaned, it is rolled into a cylindrical shape according to the shape of a dehydrator and placed in the dehydrator for dehydration. After dehydration, it is spread out and laid horizontally on two or more bamboo poles. Weights of the same mass are hung at both ends of the polyethylene fiber to fix the polyethylene fiber. The polyethylene fiber is dried at a temperature of 40°C-45°C. Ventilation should be paid attention to during the drying operation. The polyethylene fiber is dried for 2d-3d until it is completely dry to obtain a finished polyethylene fiber material.

[0020] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The present invention can significantly improve the dyeing performance of polyethylene fibers by plasma treatment of polyethylene fibers, and can make dyes more easily penetrate and adhere, thereby obtaining brighter and more durable colors, and can enhance the overall performance of polyethylene fibers. By using dispanoline C-VS as a disperse dye for preparing a dye, the dyeing step of polyethylene fiber materials can be made more environmentally friendly and safe. Dispanoline C-VS has good dyeing performance and color fastness, and can ensure the uniformity of dyeing during the dyeing process. After dyeing is completed, the color of the dyed polyethylene fibers is not easy to fall off during washing, and the strong friction fastness can reduce the color wear of the polyethylene fibers during use;

[0022] 2. The present invention can improve the dye uptake rate of the dye by using dye auxiliaries and leveling agents as materials for preparing the dye. The dye auxiliaries can improve the adsorption and diffusion of the dye on the fiber, so that more dye can adhere to the fiber, thereby improving the depth and brightness of the color, and at the same time can enhance the uniformity of dyeing, avoid the occurrence of uneven phenomena such as color spots and color flowers, and by adding active diluents and antistatic agents, the fluidity and permeability of the dye can be improved when dyeing polyethylene fibers, and the viscosity of the dye can be effectively adjusted, while enhancing the combination of the dye and the fiber, and improving the dyeing fastness of the polyethylene fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the polyethylene fiber dyeing process in an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the characteristics of polyethylene fiber after dyeing in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] The present invention discloses a dyeing process for an efficient and environmentally friendly ultra-high molecular weight polyethylene fiber. When dyeing the polyethylene fiber, a pre-treatment operation is required, including cleaning the ultra-high molecular weight polyethylene fiber and treating the dye. The main components for preparing the dye include disperse dyes, initiators, active diluents, buffers, antistatic agents and dye auxiliaries. The specific operation method of the dyeing process for the efficient and environmentally friendly ultra-high molecular weight polyethylene fiber is as follows:

[0027] Step 1: pre-treat the ultra-high molecular weight polyethylene fiber, clean the polyethylene fiber with warm water at 45°C, remove grease and dirt on its surface, and clean it with a detergent. After cleaning, place the polyethylene fiber in a plasma treatment chamber and perform plasma treatment under vacuum conditions, using NH3 as the plasma treatment gas;

[0028] Step 2, preparing a dye, placing 100-150 parts of Dispanol C-VS, 2-5 parts of benzoyl peroxide, 1-2 parts of propylene glycol methyl ether acetate, 1-2 parts of acetic acid-sodium acetate buffer, 15-25 parts of fatty alcohol polyoxyethylene ether phosphate potassium salt, 7-15 parts of sodium lignin sulfonate and 12-16 parts of a leveling agent in a stirring container in order, stirring continuously for 30-40 minutes at 20° C.-25° C. to obtain a dye raw material, and detecting the concentration, viscosity and pH value of the dye raw material;

[0029] Step 3: Mix the dye raw material and deionized water in a mass ratio of 1:1-2 to prepare a mixed dye solution, spread the pretreated polyethylene fiber flat, bend it with a wooden stick, and evenly immerse it in the mixed dye solution, raise the temperature to 120°C, and dye it for 10-15 minutes, then lift the polyethylene fiber out of the mixed dye solution, hang it on a bamboo pole and let it stand for 5 minutes, then immerse the polyethylene fiber in the mixed dye solution again, repeat the operation twice, and obtain a semi-finished polyethylene fiber that has been dyed;

[0030] Step 4: After dyeing is completed, the mixed dye solution is quickly discharged and soaked in -5°C-15°C frozen water for 5min-10min. After soaking, it is taken out and washed with water, and then the polyethylene fiber is fixed with water-based polyurethane. After completion, it is dehydrated and dried to obtain the finished polyethylene fiber material.

[0031] In one embodiment of the present invention: in step 1, dispanoside C-VS is relatively stable compared to other disperse dyes, and changes in pH and temperature have little effect on dispanoside C-VS. The prepared dye raw material needs to be stored in a cool, dry and ventilated environment.

[0032] In one embodiment of the present invention, in step 1, the cleaning agent is an alkaline cleaning agent, the cleaning time is 15 min-20 min, and the vacuum degree in the plasma processing chamber needs to reach 10 -3 Pa, using NH3 as the plasma treatment gas for 10min-15min, and the treatment power is 100W-200W.

[0033] In one embodiment of the present invention: in step 2, Dispanso C-VS is a disperse dye, benzoyl peroxide is an initiator, propylene glycol methyl ether acetate is an active diluent, acetic acid-sodium acetate buffer is a buffer, fatty alcohol polyoxyethylene ether phosphate potassium salt is an antistatic agent, and sodium lignin sulfonate is a dye auxiliary.

[0034] In one embodiment of the present invention: in step 2, the leveling agent is one of lauryl alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, sodium dodecylbenzene sulfonate and styrene-maleic anhydride random copolymer, specifically sodium dodecylbenzene sulfonate and styrene.

[0035] In one embodiment of the present invention: in step three, when the polyethylene fiber material is too long, a wooden stick is used to wrap and tighten the polyethylene fiber material and place it in the mixed dye solution, and the heating rate of the mixed dye solution is 5° C. / min.

[0036] In one embodiment of the present invention: in step three, after the dyeing is completed, the mixed dye liquid in the polyethylene fiber needs to be driven out with a wooden stick, and then the polyethylene fiber is hung on a bamboo pole, and the height of the polyethylene fiber from the ground is 35cm-40cm.

[0037] In one embodiment of the present invention: in step four, after soaking in frozen water, let it stand for 10 minutes, and then use warm water at 25℃-40℃ to wash the polyethylene fiber three times. When washing, pinch the two corners of the polyethylene fiber in the same direction, drag it back and forth in the warm water to wash, and avoid rubbing and twisting during washing.

[0038] In one embodiment of the present invention: in step 4, after the polyethylene fiber is cleaned, it is rolled into a cylindrical shape according to the shape of a dehydrator and placed in the dehydrator for dehydration. After dehydration, it is spread out and laid horizontally on two or more bamboo poles. Weights of the same mass are hung at both ends of the polyethylene fiber to fix the polyethylene fiber. The polyethylene fiber is dried at a temperature of 40°C-45°C. Ventilation should be paid attention to during the drying operation. The polyethylene fiber is dried for 2d-3d until it is completely dry to obtain a finished polyethylene fiber material.

[0039] Embodiment 1

[0040] The ultra-high molecular weight polyethylene fiber was pretreated, and the polyethylene fiber was cleaned with warm water at 45°C to remove grease and dirt on its surface, and then cleaned with an alkaline detergent for 20 minutes. After cleaning, the polyethylene fiber was placed in a plasma treatment chamber and plasma treated for 15 minutes under vacuum conditions. The vacuum degree in the plasma treatment chamber needs to reach 10 -3Pa, using NH3 as plasma treatment gas, preparing dye, putting 150 parts of Dispansu C-VS, 5 parts of benzoyl peroxide, 2 parts of propylene glycol methyl ether acetate, 2 parts of acetic acid-sodium acetate buffer, 15 parts of fatty alcohol polyoxyethylene ether phosphate potassium salt, 7 parts of sodium lignin sulfonate and 16 parts of sodium dodecylbenzene sulfonate into a stirring container in sequence, stirring continuously for 40 minutes at 25°C to obtain a dye raw material, first detecting the concentration, viscosity and pH value of the dye raw material, and then placing it in a negative electrode. The polyethylene fiber is stored in a cool, dry and ventilated environment, and then the dye raw material and deionized water are mixed in a mass ratio of 1:1.5 to prepare a mixed dye solution. The polyethylene fiber after pretreatment is spread out and bent with a wooden stick, and evenly immersed in the mixed dye solution. The temperature is increased to 120°C at a heating rate of 5°C / min. After immersion for 15 minutes, the polyethylene fiber is lifted out of the mixed dye solution, hung on a bamboo pole and allowed to stand for 5 minutes, and then the polyethylene fiber is immersed in the mixed dye solution again for immersion, and the operation is repeated twice to prepare a The semi-finished polyethylene fiber is dyed. After the impregnation is completed, the mixed dye in the polyethylene fiber needs to be driven out with a wooden stick, and then it is hung on a bamboo pole. The height of the polyethylene fiber from the ground is 35 cm. The mixed dye is quickly discharged and added to 5°C frozen water to soak for 10 minutes. After the soaking is completed, it is taken out and left to stand for 10 minutes and then the polyethylene fiber is washed three times with 35°C warm water. When washing, pinch the two corners of the polyethylene fiber in the same direction and drag it back and forth in the warm water to wash. When washing, avoid rubbing and twisting. After the polyethylene fiber is washed, use water-based polyurethane to fix the polyethylene fiber, and then wrap it into a cylindrical shape according to the shape of the dehydrator and put it into the dehydrator for dehydration. After dehydration, it is spread out and laid horizontally on two or more bamboo poles. Weights of the same mass are hung at both ends of the polyethylene fiber to fix the polyethylene fiber. It is dried at a temperature of 45°C. Ventilation needs to be paid attention to during the drying operation. Dry for 2 days until the polyethylene fiber is completely dry. After completion, a finished polyethylene fiber material is obtained.

[0041] Embodiment 2

[0042] The ultra-high molecular weight polyethylene fiber was pretreated, and the polyethylene fiber was cleaned with warm water at 45°C to remove grease and dirt on its surface, and then cleaned with an alkaline detergent for 20 minutes. After cleaning, the polyethylene fiber was placed in a plasma treatment chamber and plasma treated for 15 minutes under vacuum conditions. The vacuum degree in the plasma treatment chamber needs to reach 10 -3Pa, using NH3 as plasma treatment gas, preparing dye, putting 120 parts of Dispansu C-VS, 5 parts of benzoyl peroxide, 2 parts of propylene glycol methyl ether acetate, 2 parts of acetic acid-sodium acetate buffer, 15 parts of fatty alcohol polyoxyethylene ether phosphate potassium salt, 7 parts of sodium lignin sulfonate and 16 parts of sodium dodecylbenzene sulfonate into a stirring container in order, stirring continuously for 40 minutes at 25°C to obtain the dye raw material, first testing the concentration, viscosity and pH value of the dye raw material, and then putting it in a cool and dry place. , store in a dry and ventilated environment, then mix the dye raw material and deionized water in a mass ratio of 1:1.5 to prepare a mixed dye solution, spread the pretreated polyethylene fiber flat, bend it with a wooden stick, and evenly immerse it in the mixed dye solution, increase the temperature to 120°C at a heating rate of 5°C / min, and after dyeing for 15 minutes, lift the polyethylene fiber out of the mixed dye solution, hang it on a bamboo pole and let it stand for 5 minutes, then immerse the polyethylene fiber in the mixed dye solution again, repeat the operation twice to obtain the dye solution. For the semi-finished polyethylene fiber with finished color, after the impregnation and dyeing is completed, the mixed dye in the polyethylene fiber needs to be driven out with a wooden stick, and then it is hung on a bamboo pole. The height of the polyethylene fiber from the ground is 35 cm. Then the mixed dye is quickly discharged and added to the frozen water of -5℃-15℃ and soaked for 10 minutes. After the soaking is completed, it is taken out and left to stand for 10 minutes and then the polyethylene fiber is washed three times with warm water at 35℃. When washing, pinch the two corners of the polyethylene fiber in the same direction and drag it back and forth in the warm water to wash. When washing, it is necessary to avoid rubbing and twisting. After the polyethylene fiber is washed, water-based polyurethane is used to fix the polyethylene fiber, and then it is wrapped into a cylindrical shape according to the shape of the dehydrator and placed in the dehydrator for dehydration. After dehydration, it is spread out and laid horizontally on two or more bamboo poles. Weights of the same mass are hung at both ends of the polyethylene fiber to fix the polyethylene fiber. It is dried at a temperature of 45℃. Ventilation needs to be paid attention to during the drying operation. Drying is 2d until the polyethylene fiber is completely dry. After completion, the finished polyethylene fiber material is obtained.

[0043] Embodiment 3

[0044] The ultra-high molecular weight polyethylene fiber was pretreated, and the polyethylene fiber was cleaned with warm water at 45°C to remove grease and dirt on its surface, and then cleaned with an alkaline detergent for 20 minutes. After cleaning, the polyethylene fiber was placed in a plasma treatment chamber and plasma treated for 15 minutes under vacuum conditions. The vacuum degree in the plasma treatment chamber needs to reach 10 -3Pa, using NH3 as plasma treatment gas, preparing dye, putting 150 parts of Dispansu C-VS, 2 parts of benzoyl peroxide, 2 parts of propylene glycol methyl ether acetate, 2 parts of acetic acid-sodium acetate buffer, 15 parts of fatty alcohol polyoxyethylene ether phosphate potassium salt, 15 parts of sodium lignin sulfonate and 12 parts of sodium dodecylbenzene sulfonate into a stirring container in sequence, stirring continuously for 40 minutes at 25°C to obtain a dye raw material, first testing the concentration, viscosity and pH value of the dye raw material, and then putting it in a cool and dry place. , store in a dry and ventilated environment, then mix the dye raw material and deionized water in a mass ratio of 1:1-2 to prepare a mixed dye solution, spread the pretreated polyethylene fiber flat, bend it with a wooden stick, and evenly immerse it in the mixed dye solution, increase the temperature to 120°C at a heating rate of 5°C / min, and after dyeing for 15 minutes, lift the polyethylene fiber out of the mixed dye solution, hang it on a bamboo pole and let it stand for 5 minutes, then immerse the polyethylene fiber in the mixed dye solution again, repeat the operation twice to obtain the dye solution. For the semi-finished polyethylene fiber with finished color, after the impregnation and dyeing is completed, the mixed dye in the polyethylene fiber needs to be driven out with a wooden stick, and then it is hung on a bamboo pole. The height of the polyethylene fiber from the ground is 35 cm. Then the mixed dye is quickly discharged and added to the frozen water of -5℃-15℃ and soaked for 10 minutes. After the soaking is completed, it is taken out and left to stand for 10 minutes and then the polyethylene fiber is washed three times with warm water at 35℃. When washing, pinch the two corners of the polyethylene fiber in the same direction and drag it back and forth in the warm water to wash. When washing, it is necessary to avoid rubbing and twisting. After the polyethylene fiber is washed, water-based polyurethane is used to fix the polyethylene fiber, and then it is wrapped into a cylindrical shape according to the shape of the dehydrator and placed in the dehydrator for dehydration. After dehydration, it is spread out and laid horizontally on two or more bamboo poles. Weights of the same mass are hung at both ends of the polyethylene fiber to fix the polyethylene fiber. It is dried at a temperature of 45℃. Ventilation needs to be paid attention to during the drying operation. Drying is 2d until the polyethylene fiber is completely dry. After completion, the finished polyethylene fiber material is obtained.

[0045] The color fastness of the three groups of embodiments was tested, including tests on rubbing fastness, washing fastness, etc. The color uniformity was measured by naked eye observation or using a colorimeter. The fiber strength test required the use of corresponding mechanical testing equipment in accordance with standard testing methods.

[0046] Use a friction fastness tester to fix the dyed polyethylene fiber sample on the tester, and perform dry friction and wet friction tests respectively. Dry friction is to rub the sample back and forth a certain number of times with a dry standard friction cloth, and wet friction is to soak the friction cloth with distilled water and then perform the same operation. It is expressed in grades, with levels from 1 to 5. The higher the grade, the better the friction fastness.

[0047] The dyed polyethylene fiber sample is washed according to the specified conditions, and the color change is evaluated by comparing it with the unwashed standard sample, and recorded according to grades 1-5. The higher the grade, the better the uniformity.

[0048] Use mechanical testing equipment such as a universal material testing machine to fix the polyethylene fiber sample on the testing machine in a standard clamping method, stretch it at a certain stretching speed until the sample breaks, and record the maximum force value at the time of break in megapascals (MPa), which represents the tensile strength of the fiber.

[0049] As attached Figure 2 As shown, the tensile strength of ultra-high molecular weight polyethylene fiber will be affected by the dye, but the effect is not significant, and the used Dispansu C-VS is more environmentally friendly and safe.

[0050] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

[0051] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above contents are merely examples and explanations of the present invention. Various modifications or additions to the specific embodiments described or replacements in similar ways by technicians in the technical field shall fall within the protection scope of the present invention as long as they do not deviate from the invention or exceed the scope defined by the claims.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A highly efficient and environmentally friendly ultra-high molecular weight polyethylene fiber dyeing process, which requires a pre-treatment operation when dyeing the polyethylene fiber, including cleaning the ultra-high molecular weight polyethylene fiber and treating the dye, characterized in that: The main components of the dye preparation include disperse dyes, initiators, active diluents, buffers, antistatic agents and dye auxiliaries. The specific operation method of the dyeing process of the high-efficiency and environmentally friendly ultra-high molecular weight polyethylene fiber is as follows: Step 1: pre-treat the ultra-high molecular weight polyethylene fiber, clean the polyethylene fiber with warm water at 45°C, remove grease and dirt on its surface, and clean it with a detergent. After cleaning, place the polyethylene fiber in a plasma treatment chamber and perform plasma treatment under vacuum conditions, using NH3 as the plasma treatment gas; Step 2, preparing a dye, placing 100-150 parts of Dispanol C-VS, 2-5 parts of benzoyl peroxide, 1-2 parts of propylene glycol methyl ether acetate, 1-2 parts of acetic acid-sodium acetate buffer, 15-25 parts of fatty alcohol polyoxyethylene ether phosphate potassium salt, 7-15 parts of sodium lignin sulfonate and 12-16 parts of a leveling agent in a stirring container in order, stirring continuously for 30-40 minutes at 20° C.-25° C. to obtain a dye raw material, and detecting the concentration, viscosity and pH value of the dye raw material; Step 3: Mix the dye raw material and deionized water in a mass ratio of 1:1-2 to prepare a mixed dye solution, spread the pretreated polyethylene fiber flat, bend it with a wooden stick, and evenly immerse it in the mixed dye solution, raise the temperature to 120°C, and dye it for 10-15 minutes, then lift the polyethylene fiber out of the mixed dye solution, hang it on a bamboo pole and let it stand for 5 minutes, then immerse the polyethylene fiber in the mixed dye solution again, repeat the operation twice, and obtain a semi-finished polyethylene fiber that has been dyed; Step 4: After dyeing is completed, the mixed dye solution is quickly discharged and soaked in -5°C-15°C frozen water for 5min-10min. After soaking, it is taken out and washed with water, and then the polyethylene fiber is fixed with water-based polyurethane. After completion, it is dehydrated and dried to obtain the finished polyethylene fiber material.

2. The dyeing process of a high-efficiency and environment-friendly ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In the step 1, dispanoside C-VS is relatively stable compared to other disperse dyes, and changes in pH and temperature have little effect on dispanoside C-VS. The prepared dye raw material needs to be stored in a cool, dry and ventilated environment.

3. The dyeing process of a high-efficiency and environment-friendly ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In the step 1, an alkaline cleaning agent is used as the cleaning agent, and the cleaning time is 15-20 minutes. In the plasma treatment chamber, the vacuum degree needs to reach 10 -3 Pa, using NH3 as the plasma treatment gas for 10min-15min, and the treatment power is 100W-200W.

4. The dyeing process of a high-efficiency and environment-friendly ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In the step 2, Dispansu C-VS is a disperse dye, benzoyl peroxide is an initiator, propylene glycol methyl ether acetate is an active diluent, acetic acid-sodium acetate buffer is a buffer, fatty alcohol polyoxyethylene ether phosphate potassium salt is an antistatic agent, and sodium lignin sulfonate is a dye auxiliary.

5. The dyeing process of a high-efficiency and environment-friendly ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In the step 2, the leveling agent is one of lauryl alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, sodium dodecylbenzene sulfonate and styrene-maleic anhydride random copolymer.

6. The dyeing process of a high-efficiency and environment-friendly ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In the step three, when the polyethylene fiber material is too long, a wooden stick is used to wrap and tighten the polyethylene fiber material and place it in the mixed dye solution, and the heating rate of the mixed dye solution is 5° C. / min.

7. The dyeing process of a high-efficiency and environment-friendly ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In the step 3, after the dyeing is completed, the mixed dye liquid in the polyethylene fiber needs to be driven out with a wooden stick, and then the polyethylene fiber is hung on a bamboo pole, and the height of the polyethylene fiber from the ground is 35cm-40cm.

8. The dyeing process of a high-efficiency and environment-friendly ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In the step 4, after soaking in frozen water, let it stand for 10 minutes, and then use warm water at 25°C-40°C to wash the polyethylene fiber three times. When washing, pinch the two corners of the polyethylene fiber in the same direction and drag it back and forth in the warm water to wash. Avoid rubbing and twisting during washing.

9. The dyeing process of a high-efficiency and environment-friendly ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: In the step 4, after the polyethylene fiber is cleaned, it is rolled into a cylindrical shape according to the shape of a dehydrator and placed in the dehydrator for dehydration. After dehydration, it is spread out and laid horizontally on two or more bamboo poles. Weights of the same mass are hung at both ends of the polyethylene fiber to fix the polyethylene fiber. The polyethylene fiber is dried at a temperature of 40° C. to 45° C. During the drying operation, ventilation should be paid attention to. The polyethylene fiber is dried for 2 days to 3 days until the polyethylene fiber is completely dry to obtain a finished polyethylene fiber material.

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