阅读说明：本技术 含有残留寡聚物的织物基材的染色方法 (Method for dyeing textile substrates containing residual oligomers ) 是由 王赵增 黄馨妘 陈奕涵 于 2018-08-08 设计创作，主要内容包括：一种含有残留寡聚物的织物基材的染色方法,包含以下步骤：(a)将该织物基材附接于安装载座以形成基材承载座,以在热压釜中进行超临界染色；及(b)覆盖微孔膜于该基材承载座的织物基材上,该微孔膜的孔洞尺寸可以使该织物基材在该热压釜中进行染色时,含有染剂的超临界流体被容许穿过该微孔膜以使该织物基材被染色,同时,该超临界流体夹带的残留寡聚物被该微孔膜所拦阻。该含有残留寡聚物的织物基材的染色方法可以提高染剂的染色程度且可减少废水排放问题。(A method of dyeing a textile substrate containing residual oligomers, comprising the steps of: (a) attaching the fabric substrate to a mounting carrier to form a substrate carrier for supercritical dyeing in an autoclave; and (b) covering a microporous membrane on the fabric substrate of the substrate bearing seat, wherein the pore size of the microporous membrane is such that when the fabric substrate is dyed in the autoclave, a supercritical fluid containing a dye is allowed to pass through the microporous membrane so as to dye the fabric substrate, and simultaneously, residual oligomers carried by the supercritical fluid are blocked by the microporous membrane. The dyeing method of the textile base material containing the residual oligomer can improve the dyeing degree of the dye and reduce the problem of waste water discharge.)

1. A process for dyeing a textile substrate containing residual oligomers, characterized in that it comprises the following steps:

(a) attaching the fabric substrate to a mounting carrier to form a substrate carrier for supercritical dyeing in an autoclave; and

(b) covering a microporous membrane on the fabric substrate of the substrate bearing seat, wherein the size of the pores of the microporous membrane can enable the supercritical fluid containing the dye to penetrate through the microporous membrane to dye the fabric substrate when the fabric substrate is dyed in the autoclave, and simultaneously, the residual oligomer carried by the supercritical fluid is blocked by the microporous membrane.

2. Dyeing process according to claim 1, characterized in that: the pore size of the microporous membrane is smaller than the size of the residual oligomer.

3. Dyeing process according to claim 2, characterized in that: the microporous membrane has a pore size in the range of 0.1 to 1.0 μm.

4. Dyeing process according to claim 3, characterized in that: the microporous membrane has a pore size in the range of 0.2 to 0.8 μm.

5. Dyeing process according to claim 1, characterized in that: the microporous membrane has a thickness in the range of 10 to 90 mm.

6. Dyeing process according to claim 1, characterized in that: the microporous membrane is made of a polymeric material.

7. Dyeing process according to claim 6, characterized in that: the microporous membrane is made of polytetrafluoroethylene.

8. Dyeing process according to claim 6, characterized in that: the microporous membrane is made of polyurethane.

9. Dyeing process according to claim 6, characterized in that: the microporous membrane is made of polypropylene.

10. Dyeing process according to claim 1, characterized in that: the fabric substrate is made of a polyester material.

11. Dyeing process according to claim 1, characterized in that: the dye is a disperse dye.

12. Dyeing process according to claim 1, characterized in that: the mounting carrier is rod-shaped, and in the step (a), the fabric substrate is wound around the mounting carrier.

13. Dyeing process according to claim 1, characterized in that: the supercritical fluid is supercritical carbon dioxide.

Technical Field

The invention relates to a method for dyeing a textile substrate, in particular to a method for dyeing a textile substrate containing residual oligomer.

Background

In the dyeing process of fabrics (such as polyester cloth), the supercritical fluid dyeing is used instead of water dyeing, so that the problem of waste water discharge can be reduced. However, in the fabric process, a small amount of residual oligomers (residual oligomers) are generated during the synthesis and spinning stages, and the supercritical fluid tends to accelerate the leaching (leach) of the residual oligomers to the fabric surface in a high temperature bath (dye bath), so that stains tend to be formed on the fabric surface during the dyeing stage of the supercritical fluid, and the residual oligomers tend to aggregate with the dye (aggregatate) and deposit on the inner wall of the dyeing tank, thereby causing equipment pollution.

In the existing supercritical fluid dyeing process, residual oligomers on the surface of the fabric are mostly removed by washing with water after the dyeing stage, but the demand of reducing wastewater discharge is also met, and only about 15% to 25% of the residual oligomers can be removed generally.

Disclosure of Invention

The present invention aims to provide a method for dyeing a textile substrate containing residual oligomers, which can overcome the disadvantages of the background art.

The dyeing method of the textile base material containing residual oligomer comprises the following steps: (a) attaching (attaching) the fabric substrate to a mounting carrier to form a substrate-loaded carrier for supercritical dyeing in an autoclave; and (b) covering (overlapping) a microporous membrane on the fabric substrate of the substrate bearing seat, wherein the pore size of the microporous membrane is such that when the fabric substrate is dyed in the autoclave, a supercritical fluid containing a dye is allowed to pass through the microporous membrane to dye the fabric substrate, and simultaneously, residual oligomers carried by the supercritical fluid are blocked by the microporous membrane.

The invention has the beneficial effects that: the dyeing method of the textile substrate containing the residual oligomer can improve the dyeing degree of the dye and does not generate any waste water.

The present invention will be described in detail below:

the invention relates to a method for dyeing a textile substrate containing residual oligomer, which comprises the following steps: (a) attaching the fabric substrate to a mounting carrier to form a substrate carrier for supercritical dyeing in an autoclave; and (b) covering a microporous membrane on the fabric substrate of the substrate bearing seat, wherein the pore size of the microporous membrane is such that when the fabric substrate is dyed in the autoclave, a supercritical fluid containing a dye is allowed to pass through the microporous membrane to dye the fabric substrate, and simultaneously, residual oligomers carried by the supercritical fluid are captured and blocked by the microporous membrane.

Preferably, the pore size of the microporous membrane is smaller than the size of the residual oligomer. More preferably, the microporous membrane has a pore size in the range of 0.1 to 1.0 μm. Most preferably, the microporous membrane has a pore size in the range of 0.2 to 0.8 μm.

Preferably, the microporous membrane has a thickness in the range of 10 to 90 mm.

Preferably, the microporous membrane is made of a polymeric material. In some embodiments of the invention, the microporous membrane is made of polytetrafluoroethylene. In some embodiments of the invention, the microporous membrane is made of polyurethane. In some embodiments of the invention, the microporous membrane is made of polypropylene.

Preferably, the fabric substrate is made of a polyester material.

Preferably, the dye is a disperse dye (disperse dye). In embodiments of the present invention, the dye is disperse red 92 or disperse blue 60.

Preferably, the mounting carrier is rod-shaped, and in step (a), the fabric substrate is wound around the mounting carrier.

Preferably, the supercritical fluid is supercritical carbon dioxide.

Drawings

Other features and effects of the present invention will be apparent from the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a scanning electron micrograph illustrating a supercritical carbon dioxide treated polyester fabric of example 1 of the dyeing method of the present invention;

FIG. 2 is a scanning electron micrograph illustrating a supercritical carbon dioxide treated polyester fabric of comparative example 1 of the dyeing method of the present invention; and

FIG. 3 is a scanning electron micrograph illustrating a supercritical carbon dioxide treated polyester fabric of comparative example 2 of the dyeing method of the present invention.

Detailed Description

The invention will be further described in the following examples, but it should be understood that these examples are for illustrative purposes only and are not to be construed as limiting the practice of the invention.

< example 1>