WO2022032436A1 - Method and system for improving wearability of textile material and/or decoloring textile material - Google Patents

Abstract

A method for improving wearability of a textile material and/or decoloring a textile material, comprising the following steps: performing drying processing for about 0.5-3 hours by heating a textile material to 95-120°C under an inert atmosphere or a vacuum condition, and then raising the temperature to perform processing for about 3-48 hours. The textile material has a soft luster, and the wearability of the textile material such as durability, a style, and a feel is improved; the method can achieve complete or partial stripping of the textile material, thereby obtaining a product having a special style. A system for improving wearability of a textile material and/or decoloring a textile material, comprising a reaction apparatus, a gas purifier, and a medium circulation apparatus (an inert gas circulation heater or a vacuum pump), and the three being connected by means of pipes. The method and system are simple and flexible to operate, low in production cost, free of use of chemical additives and free of generation of wastewater, and easy for industrial implementation.

Description

A method and system for improving wearability of textile materials and/or decolorizing textile materials technical field

The present invention relates to the field of improving the wearability of textile materials and/or decolorizing textile materials, in particular to a method and system for improving the wearability and/or decolorizing textile materials.

Background technique

With the improvement of living standards, people's requirements for the wearability of clothing are increasing. If we can improve the wearability of clothing to reduce the amount of textile waste, it is an effective environmental protection measure to reduce the consumption of raw materials and reduce emissions.

At present, physical, chemical modification, modification and finishing methods are usually used to enhance the durability of clothing fabrics, and to optimize their wearing properties such as style, gloss and hand feel (for example, CN105696337A, CN104532589B, CN105200775A, CN102733168B). However, these methods all face some problems, such as the negative effects caused by the use of chemical agents, or sacrificing one property of the textile to improve another property but leading to a decrease in the overall wearability of the textile. In addition, for the stripping treatment of textiles, it is mainly realized by using some chemical treatment methods, such as bleaching method and extraction method (eg JP2007254904A, US7981337B2, CN1628192A, JP3232010B2, US5261925A, US20140068871A1, JP2015048570A, CN201459424U, etc.) The use of reagents and the large volumes of wastewater generated by the treatment process can have a negative impact on the environment and even damage textile materials.

Polyester is one of the most commonly used chemical fibers in the textile industry. Its biggest advantage is that it has good wrinkle resistance and shape retention, and is suitable for outerwear (especially for tooling fabrics) and outdoor products. Polylactic acid is a sustainable ecological fiber, which is in the stage of rapid development in the textile industry. However, both polyester and polylactic acid fabrics are often prone to aging after repeated washing with detergents, high-temperature ironing, or even direct exposure to sunlight or hot oxygen. Polyester and polylactic acid fibers, especially polylactic acid fibers, are easily decomposed by the action of microorganisms, that is, the macromolecular chains of polyester or polylactic acid are destroyed, so that the strength of the fibers is deteriorated, and it is easy to cause discoloration, resulting in some local peeling. A phenomenon that affects the overall appearance. Therefore, how to overcome the performance degradation of textiles in daily use, improve the wearability of textiles and realize their regeneration or reuse is an important and challenging issue to be solved urgently.

SUMMARY OF THE INVENTION

Aiming at the problem of continuous aging or partial discoloration of textiles during use, the present invention provides a method and system for improving the wearing performance of textile materials and/or decolorizing textile materials, so as to improve and re-use the wearing performance of textiles. use. The present invention also provides textile materials produced by the methods and/or systems of the present invention.

In order to solve the problems in the prior art, a first aspect of the present invention provides a method for improving the wearability of textile materials, comprising the following steps:

Drying step: heating the textile material to about 80-120° C. under an inert atmosphere or a vacuum degree of ≤ about 10 mbar for about 0.5-3 hours; and

High temperature treatment step: under the condition of inert atmosphere or vacuum degree ≤ about 10 mbar, the textile material treated by the drying step is heated to about 130-250° C. for about 3-48 hours.

In some preferred embodiments, the textile material is heated to about 100-110°C during the drying step, and/or the textile material is heat treated during the drying step for about 1-2 hours.

In some embodiments, the high temperature treating step comprises heating the textile material to about 130-250°C, such as about 140-230°C, preferably about 130-160°C, about 140-155°C, about 150-230°C , about 160-250°C, about 170-230°C, about 180-230°C, etc. In some embodiments, the high temperature treatment step comprises high temperature treatment of the textile material for about 3-48 hours, preferably about 6-24 hours, about 3-36 hours, about 3-24 hours, about 6-36 hours, etc. .

In some embodiments, the method of the present invention further comprises the step of cooling the high temperature treated textile material (e.g., to room temperature) after the high temperature treatment step.

In some embodiments, during the drying and/or high temperature treatment steps, the inert atmosphere is selected from nitrogen, helium, carbon dioxide, or any combination thereof, preferably high-purity (eg, ≧about 99.9% pure) nitrogen, Helium, carbon dioxide, or any combination thereof, more preferably high-purity (eg, > about 99.9% pure) nitrogen. In some embodiments, the drying step and/or the high temperature treatment step of the method of the present invention is performed under vacuum, wherein the vacuum is ≤ about 10 mbar, preferably ≤ about 5 mbar, more preferably ≤ about 1 mbar.

In some embodiments, the methods of the present invention further comprise:

Preparation step: providing and pre-treating the textile material to make it suitable for the drying step.

In some embodiments, the preparation step is performed before the drying step. In some embodiments, the pretreatment includes removing non-textiles from the textile material, processing the textile material into small pieces (eg, strips, pieces, staple fibers, etc.), washing the textile material, or any combination thereof.

In some embodiments of the methods of the present invention, removing the non-textile from the textile material includes, but is not limited to, separating non-textile trims, buttons, zippers, etc. on the textile from the textile material, thereby the separated Non-textile trim, buttons, zippers, etc. are not treated by the method of the present invention. Processing the textile material into small pieces includes, but is not limited to (for example, by using a rag, fiber cutter, etc.) and cutting the textile material into small strips, chips, or short fibers (for example, about 1 cm to 10 cm in length), etc., for the purpose of It is to facilitate the processing of subsequent steps or to strengthen the processing effect of subsequent steps. The purpose of washing the textile material is to remove contaminants from the textile material. The textile material can be laundered using conventional laundering methods in the art.

In some embodiments of the present invention, the textile materials include all-polyester or all-polylactic acid garments and fabrics, and textile waste for recycling purposes. For example, the textile material is any textile material that can be dyed with disperse dyes, including but not limited to polyester (PET) (eg all polyester), polylactic acid (PLA) (eg all polylactic acid), nylon, acrylic textile materials/textiles or any combination thereof. Preferably, the textile material is a polyester and/or polylactic acid textile material.

In some embodiments of the method of the present invention, the textile material is a polyester textile material, and the high temperature treatment step comprises heating the polyester textile material to about 160-250°C, preferably about 180-230°C; and/or, The polyester textile material is treated for about 3-48 hours, preferably about 3-24 hours.

In some embodiments of the method of the present invention, the textile material is a polylactic acid textile material, and the high temperature treatment step comprises heating the polylactic acid textile material to about 130-160°C, preferably about 140-155°C; and/or Alternatively, the polylactic acid textile material is treated for about 3-48 hours, preferably 6-36 hours.

In some embodiments of the methods of the present invention, the drying step and the high temperature treatment step are performed in a reaction apparatus (eg, a glass vessel). Preferably, the drying step and the high-temperature treatment step further include adding glass beads to the glass container and making them fully contact with the textile material (eg, by stirring or rotating mixing, etc.). After cooling, the high temperature treated textile material can be removed from the reaction device for subsequent further processing or application.

In some embodiments, the methods of the present invention further comprise applying tension to the textile material, thereby imparting greater stiffness.

In some embodiments, wearability refers to the abrasion resistance, breaking strength, gloss, stiffness/broadness, dyeability/levelness and other properties of textile materials/fabrics/products. Therefore, "improving the wearability of textile materials" means that, after being treated by the method of the present invention, the textile materials/fabrics/products have improved abrasion resistance, breaking strength, gloss, stiffness/broadness, and/or or dyeing/leveling etc. For example, "improving the wearability of textile materials" also includes decolorizing the textile material locally so that it has a special coloring style (such as a blooming effect), or decolorizing the textile material as a whole, so that it can be changed by re-dying. original color. Thus, in some specific embodiments, the methods of the present invention may also be used to decolorize textile materials.

Accordingly, the second aspect of the invention also relates to a method for decolorizing a textile material comprising the steps defined for the method of the first aspect of the invention. In some embodiments, the term "decolorizing a textile material" includes decolorizing a textile material locally (eg, to produce a blooming or transitional color effect) or decolorizing the textile material in its entirety.

In some specific embodiments, the method for decolorizing textile materials of the present invention comprises:

Material preparation step: providing and pre-treating the textile material to make it suitable for subsequent drying steps, for example, the pre-treatment includes: removing non-textiles from the textile material, processing the textile material into small pieces (eg, cloth). strips, sheets, staple fibers, etc.), washing the textile material or any combination thereof (eg, performing the pretreatment as defined in the first aspect of the invention);

Drying step: heating the textile material to about 80-120°C (preferably about 100- 110°C), the treatment time is about 0.5-3 hours (preferably about 1-2 hours); and

High temperature treatment step: under the condition of inert atmosphere (preferably pure nitrogen atmosphere) or vacuum degree ≤ about 10 mbar (preferably ≤ about 5 mbar, more preferably ≤ about 1 mbar), the textile material treated by the drying step is heated to about 130-250 °C (eg about 140-230°C, preferably about 140-155°C, about 130-160°C, about 150-230°C, about 160-250°C, about 170-230°C, about 180-230°C), treated for about 3 -48 hours (eg, about 6-24 hours, about 3-36 hours, about 3-24 hours, about 6-36 hours). In some embodiments of the method of the second aspect, the method further comprises the step of cooling the high temperature treated textile material (eg, to room temperature) after the high temperature treatment step. In some embodiments, the inert atmosphere is as defined in the first aspect of the present invention.

In some specific embodiments of the method of the second aspect, the drying step and the high temperature treatment step are performed in a glass vessel. In some embodiments, the drying step further includes adding glass beads to the glass vessel and allowing them to be in sufficient contact with the textile material during the heat treatment (eg, by stirring or tumble mixing, etc.). In some embodiments, the high temperature treating step further comprises high temperature treating the textile material in the presence of glass beads. After cooling, the high temperature treated textile material can be removed from the reaction apparatus for subsequent further processing (eg dyeing) or application.

In some embodiments of the second aspect, the textile material is any textile material that can be dyed with disperse dyes, including but not limited to polyester (eg all polyester), polylactic acid (eg all polylactic acid), nylon, acrylic textile materials/ Textiles or any combination thereof and other textile waste for recycling purposes. For example, the textile material may be a garment or fabric. Preferably, the textile material is a polyester and/or polylactic acid textile material.

In some embodiments, the textile material is a polyester textile material, and the high temperature processing step comprises heating the polyester textile material to about 160-250°C, preferably about 180-230°C, in the presence of glass beads; and/or Alternatively, the polyester textile material is treated for about 3-48 hours, preferably about 3-24 hours.

In some embodiments, the textile material is a polylactic acid textile material, and the high temperature processing step comprises heating the polylactic acid textile material to about 130-160°C, preferably about 140-155°C, in the presence of glass beads; And/or, the polylactic acid textile material is treated for about 3-48 hours, preferably about 6-36 hours.

In some embodiments, the pre-treating further comprises arranging the textile material including, for example, suspending, laying, laminating, or any combination thereof, and/or localizing the textile material (eg one or more ends and/or mid-sections of a textile material) tie up, thereby subjecting the textile material to a specific treatment to achieve a specific treatment effect, such as global or partial color stripping, such as halos Special effects styles such as dyes or transitions (for example, by layering). Preferably, the laminate thickness does not exceed about 15 cm, preferably about 5-10 cm.

A third aspect of the present invention provides a system for improving wearability and/or decolorizing textile materials, the system comprising:

a heatable reaction device, for example for the treatment of the textile material;

a medium circulation device, for example, for providing a vacuum environment or an inert atmosphere for the heatable reaction device; and

A gas purifier, for example, for purifying the system of gas, fine particles, dust, etc., wherein the heatable reaction device, the medium circulation device and the gas purifier are connected by pipes.

In some embodiments of the system of the present invention, the heatable reaction device is configured for drying and high temperature treatment of textile materials, and the medium circulation device is configured to provide an inert atmosphere to the heatable reaction device or vacuum, and/or the gas purifier is formulated to purify the system of gas, dust, particulate matter, etc.

In some embodiments of the systems of the present invention, the heatable reaction device includes a glass vessel (for example, for loading a material, such as the textile material), a heater, and optionally a stirrer. For example, the glass container may be a beaker, and/or the heater may be a water bath heater or an oil bath heater, preferably an oil bath heater. In a preferred embodiment, the heatable reaction device is a rotary evaporator, such as the N-1300 rotary evaporator from EYELA.

In some preferred embodiments, the heatable reaction device is configured to dry the textile material at a temperature of about 80-120°C, preferably about 100-110°C (eg, for about 0.5-3 hours, preferably about 1- 2 hours); and/or, the heatable reaction device is set at about 130-250°C (preferably about 140-230°C, about 140-155°C, about 160-250°C, about 170-230°C, or The textile material is hyperthermic (for, eg, about 3-48 hours, eg, about 6-24 hours, about 3-36 hours, about 3-24 hours, or about 6-36 hours) at a temperature of about 180-230°C. In some preferred embodiments, the glass container is further configured to contain glass beads and to thoroughly mix the glass beads with the textile material.

In some embodiments of the system of the present invention, the medium circulation device is an inert gas circulation heater or a vacuum pump. In some embodiments, the inert gas circulation heater includes an inert gas generator, a heater, an automatic temperature controller, and a blast circulation system.

In some embodiments, the heatable reaction apparatus is configured to operate under inert atmosphere or vacuum conditions. When the heatable reaction device is used under vacuum conditions, the medium circulation device is a vacuum pump. The vacuum pump may be arranged to provide a vacuum of ≤ about 10 mbar, preferably ≤ about 5 mbar, more preferably ≤ about 1 mbar for the heatable reaction device. When the heatable reaction device is used under an inert atmosphere, the medium circulating device is an inert gas circulating heater. The inert gas circulation heater is configured to provide the heatable reaction unit with high-purity (eg, with a purity of ≥ about 99.9%) nitrogen, helium, carbon dioxide, or any combination thereof, preferably high-purity nitrogen (eg, with a purity of ≥ about 99.9%). 99.9%).

In some embodiments of the system of the present invention, the gas purifier includes a screen, a dehumidifier, and a dust monitor.

The system of the present invention is suitable for all-polyester or all-polylactic acid garments and fabrics, as well as textile wastes for recycling purposes. For example, the system of the present invention is applicable to any textile material that can be dyed with disperse dyes, including but not limited to polyester (eg, all polyester), polylactic acid (eg, all polylactic acid), nylon, acrylic textile materials/textiles, or any combination thereof.

In some embodiments, the system of the present invention is adapted to perform the methods described in the first and second aspects of the present invention.

A fourth aspect of the invention also provides a textile material treated by the method of the first and second aspects of the invention or the system of the third aspect of the invention and an article formed from the treated textile material.

Compared with the prior art, the method and system of the present invention are simple and flexible in operation, and can also be combined with some special techniques or instruments in the treatment process to manufacture special styles of textile materials, for example, by applying Specific tension to make it have better straightness, or to partially tie the textile to achieve the effect of partial color stripping, or to laminate textiles of different colors to make textiles with transitional colors, and so on. In particular, the method and system of the present invention are low in cost, do not need to use chemical additives, do not generate waste water, and are easy to implement in industrialization.

Description of drawings

The above and other objects and features of the present invention will become apparent from the following description of the present invention in conjunction with the accompanying drawings.

Figure 1 shows a schematic diagram of a system according to certain embodiments of the present invention.

Figure 2 is a photograph showing a comparison of the peel rates of polyester (left and middle) and polylactic acid (right) sheets before and after treatment with methods according to certain embodiments of the present invention.

Figure 3 is a photograph showing a polyester cloth sheet prior to treatment with methods according to certain embodiments of the present invention.

Figure 4 is a photograph showing a polyester fabric sheet with a special blooming effect treated with methods according to certain embodiments of the present invention.

detailed description

The technical solutions of the present invention will be further described below according to specific embodiments. The protection scope of the present invention is not limited to the following examples, which are listed for illustrative purposes only and do not limit the present invention in any way.

1, the method and system of the present invention will be further described. First, a textile material such as PET or PLA is pretreated to remove attached buttons, chains, non-textile ornaments, etc., and cut it into pieces of suitable size. Then, put the pretreated textile material into the glass container of the N-1300 rotary evaporator, put in a certain amount of glass beads at the same time, turn on the circulating heater and fill the reaction device with heated pure nitrogen (or use a vacuum pump to The reaction apparatus provides a vacuum of ≤ about 10 mbar), and the glass vessel is heated to a temperature of about 80-120 °C using an oil bath of a N-1300 rotary evaporator, during which the reaction apparatus is rotated to uniformly heat the textile material and The glass beads are mixed well and the treatment duration is about 0.5-3 hours. After the drying process, continue to supply heated pure nitrogen to the reaction device through a circulating heater (or use a vacuum pump to provide the reaction device with a vacuum of ≤ about 10 mbar), so that the temperature of the reaction device is raised to about 130-250 ° C, continue The reaction apparatus was rotated to thoroughly mix the glass beads with the textile material, and the treatment time was about 3-48 hours. During the treatment process, the gas purifier is turned on to remove the gas in the system, the generated fine particles or dust such as dye molecules, etc. After the treatment is completed, the material in the reaction device is cooled to room temperature. At this time, it can be observed that the dye molecules on the textile material are adsorbed to the glass container or glass beads, so as to obtain soft gloss, stiffness and abrasion resistance. decolorized textile material.

In some embodiments, the methods described herein or the systems described herein can be performed without the use of glass beads.

In some embodiments, the methods of the present invention may be practiced or the systems of the present invention run using a reaction apparatus that does not or does not contain glass vessels without the need to decolorize the textile material.

The method is simple and flexible in process, low in production cost, does not use chemical auxiliaries, and does not generate waste water, which can not only improve the wearing performance of textiles, but also achieve overall color stripping (the color stripping rate can reach more than 95%) or partial stripping. color to create special styles of textiles.

Unless otherwise defined, the terms used in the present invention have the meanings commonly understood by those skilled in the art. The present invention will be further described below in conjunction with the examples.

Example 1

A piece of partially faded red polyester uniform cloth was placed in a glass container of an N-1300 rotary evaporator under an inert atmosphere, the circulating heater was turned on, and heated pure nitrogen was charged into the reaction device, and the temperature of the system was raised to 100 °C and then heated. Hold for 2 hours. After that, the temperature was raised to 215° C. and maintained for 3 hours, while the gas purifier was turned on. After the reaction was completed, the apparatus was cooled.

A polyester uniform sheet with improved stiffness and abrasion resistance (see Figure 2) was obtained, with a peeling rate of 94.7%, which could be re-dyed and reused.

Example 2

Place the polyester-dyed windbreaker cloth pieces (see the top two pieces of cloth in Fig. 3) in the glass container of the N-1300 rotary evaporator under vacuum, vacuumize to the vacuum degree of the system ≤ 10mbar, and heat it to 105 ℃ to maintain 1.5 hours. Then, the temperature was raised to 230° C. and maintained for 2.5 hours when the degree of vacuum was less than or equal to 1 mbar, and the gas purifier was turned on at the same time. After the reaction was completed, the apparatus was cooled.

A polyester windbreaker fabric with soft luster and improved stiffness and hand feeling is obtained (see the upper two fabrics in Figure 4), and the yarns of different colors are treated to achieve partial dye random transfer, resulting in a special color. Overstyled product.

Example 3

A dark blue polylactic acid jacket cloth piece (see the bottom left cloth piece in Figure 3) was placed in a glass container of an N-1300 rotary evaporator under vacuum, and the vacuum was evacuated until the vacuum degree of the system was ≤5mbar, and heated to 105°C for 2 hours. Then, when the vacuum degree is ≤1 mbar, the temperature is raised to 150 °C and maintained for 10 hours, and the gas purifier is turned on at the same time. After the reaction was completed, the apparatus was cooled.

A polylactic acid sweater cloth with soft luster and improved stiffness and hand feeling is obtained (see the bottom left cloth in Figure 4), and its overall changes from dark blue to soft light blue, realizing the change of clothing color. .

The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (13)

1. A method for improving the wearability of textile materials and/or decolorizing textile materials, the method comprises the following steps:

   Drying step: heating the textile material to about 80-120° C. under an inert atmosphere or a vacuum degree of ≤ about 10 mbar for about 0.5-3 hours; and

   High temperature treatment step: under the condition of inert atmosphere or vacuum degree ≤ about 10 mbar, the textile material treated by the drying step is heated to about 130-250° C. for about 3-48 hours.
2. The method of claim 1, further comprising the steps of:

   Preparation step: providing and pre-treating the textile material to make it suitable for the drying step,

   Wherein the pretreatment includes: removing non-textiles from the textile material, processing the textile material into small pieces, washing the textile material, or any combination thereof.
3. The method of claim 1, wherein the method further comprises the step of cooling the high temperature treated textile material after the high temperature treatment step.
4. The method of claim 1, wherein in the drying and/or high temperature treatment step, the inert atmosphere is selected from nitrogen, helium, carbon dioxide or any combination thereof.
5. The method according to any one of claims 1-4, wherein the textile material is a disperse dye-dyeable textile material, including but not limited to polyester (PET), polylactic acid (PLA), nylon, acrylic textile material or any combination thereof.
6. 6. The method of claim 5, wherein the textile material is a polyester textile material, and the high temperature treatment step comprises heating the textile material subjected to the drying step to about 180-230°C for about 3-24 hours.
7. The method of claim 5, wherein the textile material is a polylactic acid textile material, and the high temperature treatment step comprises heating the textile material subjected to the drying step to about 140-155°C for about 3-24 hours.
8. The method according to claim 5, wherein the drying step and the high temperature treatment step are performed in a glass container, and the drying step further comprises adding glass beads to the glass container and causing it to interact with the glass container during the heat treatment. The textile material is in sufficient contact, and the high temperature treating step further comprises high temperature treating the textile material in the presence of glass beads, thereby decolorizing the textile material.
9. 9. The method of claim 8, wherein decolorizing the textile material comprises bulk or partial peeling of the textile material,

   wherein the pretreatment optionally further comprises: arranging the textile material,

   Wherein, the arranging includes suspending, laying, laminating, or any combination thereof, and/or locally tying the textile material.
10. A system for improving the wearability of textile materials and/or decolorizing textile materials, the system comprising:

    Heated reactors,

    media circulation device, and

    gas purifier,

    Wherein the heatable reaction device, the medium circulation device and the gas purifier are connected by pipelines.
11. The system of claim 10, wherein the medium circulation device is an inert gas circulation heater or a vacuum pump, wherein the inert gas circulation heater includes an inert gas generator, a heater, an automatic temperature controller, and a blower circulation system .
12. 11. The system of claim 10, wherein the gas purifier includes a screen, a dehumidifier, and a dust monitor.
13. A treated textile material or an article formed therefrom produced by the method of any of claims 1-9 or the system of any of claims 10-12.

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