CN121087798A - Pretreatment liquid before dyeing of lyocell fabric, preparation method and pretreatment process before dyeing - Google Patents
Pretreatment liquid before dyeing of lyocell fabric, preparation method and pretreatment process before dyeingInfo
- Publication number
- CN121087798A CN121087798A CN202511434818.9A CN202511434818A CN121087798A CN 121087798 A CN121087798 A CN 121087798A CN 202511434818 A CN202511434818 A CN 202511434818A CN 121087798 A CN121087798 A CN 121087798A
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- dyeing
- lyocell fabric
- fabric
- lyocell
- softener
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Abstract
The application discloses pretreatment liquid before dyeing of a lyocell fabric, a preparation method and a pretreatment process before dyeing, wherein the pretreatment liquid before dyeing of the lyocell fabric comprises, by mass, 1-3% of a nonionic penetrating agent, 8-10% of a softening agent and the balance of water. After the pretreatment liquid is adopted to perform the pre-shaping treatment on the fabric before dyeing, the fabric has certain softness when being dyed in a later dyeing vat, and the problems of scratch and fibrillation caused by too hard fabric dyeing are avoided.
Description
Technical Field
The invention relates to the technical field of textile processing, in particular to pretreatment liquid before dyeing of lyocell fabric, a preparation method and a pretreatment process before dyeing.
Background
Lyocell, an artificial cellulose fiber, is widely used in textile industry due to its excellent hygroscopicity, breathability and softness. However, lyocell fibers are susceptible to fibrillation during finishing due to their particular sheath-core structure. Fibrillation not only seriously affects the wearing comfort of the fabric, but also reduces the durability and the aesthetic degree of the fabric.
To solve this problem, the main method at the present stage is to enhance the stability of lyocell fibers by crosslinking the yarns to prevent them from fibrillation. Chinese patent CN112458752a discloses a treatment method for antigen fibrillation of lyocell fibers, in which initial lyocell fibers are immersed in an antigen fibrillation cross-linking agent, and then sequentially subjected to multiple padding and solidification, wherein the cross-linking agent comprises a strong acid catalyst and a cross-linking agent active material, and the cross-linking agent active material is selected from one of butanol etherified melamine, methylated melamine and methylated hexamethylol melamine. However, this crosslinking method may cause the fibers to be fibrillated again due to various factors such as temperature, humidity, etc. during the post-finishing process, so that the performance of the fabric is affected. The problem of fibrillation of lyocell fabric severely hampers the large area application of lyocell fibres in the textile field.
Chinese patent CN117449090a discloses a processing technology for fibrillation of lyocell fabric, which performs crosslinking treatment after dyeing the fabric, and the adopted crosslinking treatment liquid has reasonable configuration and good permeability, and can go deep into the lyocell fiber, so that hairiness on the fiber surface is sealed again, thereby avoiding fibrillation of the lyocell fiber in the taking process, not only improving the taking performance of the lyocell fabric, but also greatly improving the aesthetic degree and durability of the fabric, so that the lyocell fabric is softer, more comfortable and easy to clean, and meanwhile, the original strength and toughness of the lyocell fabric are not lost. However, the cross-linking treatment is a treatment process after dyeing, which cannot solve the fibrillation problem caused by the dyeing before and during the dyeing treatment, and the conventional pre-shaping treatment is carried out on the lyocell fabric before dyeing, wherein the conventional pre-shaping treatment is carried out on the lyocell fabric after passing through a clear water in a sizing machine slurry tank, removing excessive moisture through a rolling mill, and then carrying out air drying treatment through a sizing machine oven, and the quality problems of scratch and fibrillation can occur in the fabric after the pre-shaping treatment in the next dyeing process, mainly because the lyocell fabric is hardened when the fabric is subjected to water, the fabric is not soft enough, the fabric is required to be continuously beaten and rolled in a dye vat during the dyeing process, and the problems of scratch and fibrillation can occur due to the fact that the surface part of the fabric fiber is damaged under the physical effects of continuous folding, long-time friction with the surface of a dye vat drum and the like can occur.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a pretreatment liquid before dyeing of lyocell fabric, a preparation method and a pretreatment process before dyeing, and solves the problems of scratch and fibrillation in the dyeing process of the fabric.
In order to solve the problems, the invention provides the following technical scheme:
According to the first aspect, the pretreatment liquid for the lyocell fabric before dyeing comprises, by mass, 1-3% of a nonionic penetrating agent, 8-10% of a softening agent and the balance of water.
Further, the pretreatment liquid before dyeing the lyocell fabric comprises, by mass, 1% of a nonionic penetrating agent, 10% of a softening agent and the balance of water.
Further, the nonionic penetrating agent comprises 17-23% of fatty alcohol polyoxyethylene ether by mass and the balance of water.
Further, the nonionic penetrating agent comprises 20 mass percent of fatty alcohol polyoxyethylene ether and the balance of water.
Further, the softener is an organosilicon softener.
Further, the softener is macro-its smooth softener and modified silicone oil smooth softener.
In a second aspect, the invention also provides a preparation method of the pretreatment liquid before dyeing of the lyocell fabric, which comprises the following steps of mixing a nonionic penetrating agent, a softening agent and water in proportion, and uniformly stirring to obtain the pretreatment liquid before dyeing of the lyocell fabric.
In a third aspect, the invention further provides a pretreatment process for dyeing the lyocell fabric, which sequentially comprises three steps of soaking, squeezing, rolling and tentering and drying, wherein the soaking step is to soak the lyocell fabric in the pretreatment liquid before dyeing the lyocell fabric according to any one of the first aspects, and fully soaking the lyocell fabric.
Further, the extrusion rolling step is to extrude and roll the soaked lyocell fabric through a rolling mill, so that the liquid carrying rate of the lyocell fabric is controlled to be 80-85%.
Further, the tentering and drying step is to put the extruded lyocell fabric into a tentering dryer, and carry out drying and shaping treatment at the temperature of 180-200 ℃ and the speed of 20-25 m/min.
Compared with the prior art, the invention has the following beneficial effects:
The pretreatment liquid provided by the invention is applied to a pre-shaping process before dyeing, is used as an immersion liquid for replacing clear water, improves the situation that the fabric is hardened when the fabric is subjected to water, and can be fused and permeated with an auxiliary agent (namely a softening agent), and the softening agent can enable the fabric to still keep certain softness after extrusion rolling and high-temperature shaping in the pre-shaping process, so that the problems of scratch and fibrillation caused by the excessive hardening of the fabric in the next dyeing process are solved, and the problems of certain softness and influence on dyeing effect and hand feeling of the fabric after the fabric is subjected to high-temperature shaping can be solved by controlling the contents of the nonionic penetrating agent and the softening agent.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below in connection with the embodiments of the present invention. It will be apparent that the embodiments described below are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the invention. As used in the specification of the embodiments of the invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Example 1
The embodiment provides pretreatment liquid for the lyocell fabric before dyeing, which comprises, by mass, 1% of a nonionic penetrating agent, 10% of a softening agent and the balance of water.
In one embodiment, the nonionic penetrating agent is a fatty alcohol polyoxyethylene ether.
In one embodiment, the concentration of the nonionic penetrating agent is 20%, that is, the mass percentage of the fatty alcohol-polyoxyethylene ether in the nonionic penetrating agent is 20%, and the balance is water.
In one embodiment, the softening agent is preferably a silicone softening agent.
In a specific embodiment, the softener may be a macro-softener, which is a weak cationic softener.
In a specific embodiment, the softener may also be a modified silicone oil smoothing softener.
The preparation method of the pretreatment liquid before dyeing the lyocell fabric comprises the following steps:
Mixing 1% by mass of nonionic penetrating agent, 10% by mass of softening agent and 89% by mass of water according to a proportion, and uniformly stirring to obtain the pretreatment liquid before dyeing the lyocell fabric.
Example 2
The embodiment provides pretreatment liquid for the lyocell fabric before dyeing, which comprises, by mass, 3% of a nonionic penetrating agent, 8% of a softening agent and the balance of water.
Wherein the nonionic penetrating agent is fatty alcohol polyoxyethylene ether.
In one embodiment, the concentration of the nonionic penetrating agent is 17%, namely the mass percentage of the fatty alcohol-polyoxyethylene ether in the nonionic penetrating agent is 17%, and the balance is water.
In one embodiment, the softening agent is preferably a silicone softening agent.
In a specific embodiment, the softener may be a macro-softener, which is a weak cationic softener.
In a specific embodiment, the softener may also be a modified silicone oil smoothing softener.
The preparation method of the pretreatment liquid before dyeing the lyocell fabric comprises the following steps:
Mixing 3% of nonionic penetrating agent, 8% of softening agent and 89% of water according to a proportion, and uniformly stirring to obtain the pretreatment liquid before dyeing the lyocell fabric.
Example 3
The embodiment provides pretreatment liquid for the lyocell fabric before dyeing, which comprises 2 mass percent of nonionic penetrating agent, 9 mass percent of softening agent and the balance of water.
Wherein the nonionic penetrating agent is fatty alcohol polyoxyethylene ether.
In one embodiment, the concentration of the nonionic penetrating agent is 23%, that is, the mass percentage of the fatty alcohol-polyoxyethylene ether in the nonionic penetrating agent is 23%, and the balance is water.
In one embodiment, the softening agent is preferably a silicone softening agent.
In a specific embodiment, the softener may be a macro-softener, which is a weak cationic softener.
In a specific embodiment, the softener may also be a modified silicone oil smoothing softener.
The preparation method of the pretreatment liquid before dyeing the lyocell fabric comprises the following steps:
mixing 2% by mass of nonionic penetrating agent, 9% by mass of softening agent and 89% by mass of water according to a proportion, and uniformly stirring to obtain the pretreatment liquid before dyeing the lyocell fabric.
In other different embodiments, the pretreatment liquid before dyeing the lyocell fabric comprises, by mass, 1-3% of a nonionic penetrating agent, 8-10% of a softening agent and the balance of water.
In other various embodiments, the softener can also be made of the product of Shenzhen Tian make innovations materials limited on the market, namely high-concentration ointment TD-1289, the main component of which is-organosilicon modified special fatty amide polymer.
In other different embodiments, the nonionic penetrant can be made from the product of Shenzhen Tian make innovations materials Co., ltd, namely the high-efficiency nonionic penetrant TD-700, the main component of which is fatty alcohol polyoxyethylene ether.
Example 4
The embodiment provides a dyeing pretreatment process of lyocell fabric, which sequentially comprises three steps of soaking, squeezing and rolling, tentering and drying.
The soaking step is to soak the lyocell fabric in the pretreatment liquid before dyeing the lyocell fabric in any one of embodiments 1 to 3, and fully soak the lyocell fabric, and the non-ionic penetrating agent in the pretreatment liquid can accelerate the fusion penetration of the fabric and the auxiliary agent (namely the softening agent), and the softening agent can ensure that the fabric still maintains certain softness after extrusion rolling and high-temperature shaping in the pretreatment shaping process, so that the hardening condition of the fabric when the lyocell fabric encounters water is improved, and the problems of scratch and fibrillation of the fabric caused by over-hardening in the next dyeing process of the fabric are solved.
The extrusion rolling step is to extrude and roll the soaked lyocell fabric through a rolling mill, so that the excessive moisture on the fabric is removed, and the liquid carrying rate of the lyocell fabric is controlled to be 80-85%.
The tentering and drying step is to put the extruded lyocell fabric into a tentering dryer, and carry out drying and shaping treatment at the temperature of 180-200 ℃ and the speed of 20-25 m/min, so as to realize the pre-shaping of the lyocell fabric.
In the above, the speed of 20-25 m/min refers to the forward conveying speed of the fabric in tentering and drying.
When the fabric is dried in the tentering dryer, the rotating speed of the fan is controlled to be 1800r/s.
While the foregoing has been provided by embodiments of the present invention with particularity, the principles and modes of carrying out the embodiments of the present invention have been described in detail by way of example only, and are not intended to limit the invention to the particular embodiments and modes of carrying out the invention, as will be apparent to those skilled in the art from consideration of this disclosure.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511434818.9A CN121087798A (en) | 2025-10-09 | 2025-10-09 | Pretreatment liquid before dyeing of lyocell fabric, preparation method and pretreatment process before dyeing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511434818.9A CN121087798A (en) | 2025-10-09 | 2025-10-09 | Pretreatment liquid before dyeing of lyocell fabric, preparation method and pretreatment process before dyeing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN121087798A true CN121087798A (en) | 2025-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202511434818.9A Pending CN121087798A (en) | 2025-10-09 | 2025-10-09 | Pretreatment liquid before dyeing of lyocell fabric, preparation method and pretreatment process before dyeing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN121087798A (en) |
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2025
- 2025-10-09 CN CN202511434818.9A patent/CN121087798A/en active Pending
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