TWI679226B - Use of dyeing solution and method for dyeing thermoplastic polyurethane sample by using the same - Google Patents

Abstract

The disclosure provides a method for dyeing a thermoplastic polyurethane sample, including the following steps: (A) providing a dyeing solution including a dye and water; (B) heating the dyeing solution to a temperature above 90 ° C; (C) applying a thermoplastic polyurethane sample Soaking in the heated dyeing solution for a soaking time of more than 10 minutes; and (D) taking out the dyed thermoplastic polyurethane sample. In addition, the present disclosure further provides the use of the aforementioned dyeing solution, which is used for dyeing a thermoplastic polyurethane sample.

Description

Use of dyeing solution and dyeing method of thermoplastic polyurethane sample using the same

The present disclosure relates to the use of a dyeing solution and a dyeing method of a thermoplastic polyurethane sample using the same, and more particularly to the use of a dyeing solution for a thermoplastic polyurethane sample manufactured by 3D printing and the use of a thermoplastic polyurethane sample produced by the 3D printing. Staining method.

With the increase in consumer demand for customization, 3D printing technology is applied to the production of shoes, and it has been one of the technologies for producing shoes for the next generation. In particular, thermoplastic polyurethane (TPU) materials made by 3D printing can be applied to the midsole portion of shoes.

When the thermoplastic polyurethane material manufactured by 3D printing is applied to shoes, it is not only required to meet the user's foot shape, or walking or exercise habits, but also to meet the user's requirements for appearance (for example, color). Therefore, after 3D printing is completed, further dyeing is required to meet the user's needs for appearance.

However, the thermoplastic polyurethane materials currently manufactured by 3D printing often face problems such as difficulty in coloring or only surface coloring during dyeing. In view of this, there is an urgent need to develop a novel dyeing solution and dyeing method, which can uniformly color the thermoplastic polyurethane material and deepen the penetration depth of the dye, so that the dyed thermoplastic polyurethane material has the advantages of high wear resistance and rich thermoplastic Application and value of polyurethane materials.

The main purpose of this disclosure is to provide a use of a dyeing solution and a dyeing method of a thermoplastic polyurethane sample using the same. By using the dyeing solution and the dyeing method of the present disclosure, the penetration depth of dyeing can be effectively improved.

The disclosure provides a method for dyeing a thermoplastic polyurethane sample, including the following steps: (A) providing a dyeing solution including a dye and water; (B) heating the dyeing solution to a temperature above 90 ° C; (C) applying a thermoplastic polyurethane sample Soaking in the heated dyeing solution for a soaking time of more than 10 minutes; and (D) taking out the dyed thermoplastic polyurethane sample.

The disclosure further provides the use of a dyeing solution, which is used for dyeing a thermoplastic polyurethane sample, wherein the dyeing solution includes: a dye and water, and the temperature of dyeing the thermoplastic polyurethane sample by the dyeing solution is above 90 ° C.

In the conventional solutions and methods for dyeing thermoplastic polyurethane samples, they often face the problem of difficult to color or only the surface color. However, the dyeing solution provided in this disclosure and the dyeing method of the thermoplastic polyurethane sample using the same can effectively improve the penetration depth of the dyeing and the abrasion resistance of the material by using the special dyeing solution and the specific dyeing temperature. Application economic benefits. In more detail, the dyeing solution provided by the present disclosure and the dyeing method of the thermoplastic polyurethane sample using the same can achieve uniform dyeing effect for any shape of the thermoplastic polyurethane sample; therefore, the dyeing solution provided by the present disclosure and the use thereof The method of dyeing thermoplastic polyurethane samples can be applied to thermoplastic polyurethane elastomers manufactured by 3D printing. In addition, the solvent used in the dyeing solution provided in the present disclosure is water, without adding other solvents, which can reduce the cost of wastewater treatment. Furthermore, the dyeing method provided in this disclosure has a simple process and can improve the production efficiency of the product. At the same time, the dyeing solution provided by this disclosure and the dyeing method of the thermoplastic polyurethane sample using the same can exhibit excellent dyeing depth and improve the wear resistance of the material.

In the dyeing solution disclosed herein, the dye may be a disperse dye; specific examples thereof include Disperse Red 60, Disperse Orange 61, Disperse Yellow 93, Disperse Blue 291, Disperse Violet 93, or a mixture thereof. However, the present disclosure is not limited to this. Disperse dyes known in the art can be applied to the dyeing solution of the present disclosure.

The dyeing solution disclosed in the present disclosure may further include an auxiliary agent, and the auxiliary agent may be sodium lignin sulfonate, or other surface active agents that can assist the dispersing of disperse dyes.

In the dyeing solution disclosed herein, the content of the dye may be between 0.0125 wt% and 1 wt%, the content of the auxiliary may be between 0 wt% and 0.075 wt%, and the balance is water.

In the dyeing method of the present disclosure, in step (B), the dyeing solution can be heated to 90 ° C or higher, and preferably between 90 ° C and 130 ° C. In addition, the temperature of the solution was maintained between 90 ° C and 130 ° C when the thermoplastic polyurethane sample was soaked.

In the dyeing method of the present disclosure, in step (C), the soaking time may be more than 10 minutes, and preferably 10 minutes to 180 minutes, and more preferably 30 minutes to 180 minutes.

In the dyeing method disclosed herein, the dyeing concentration of the thermoplastic polyurethane sample on the dye may be between 0.5% and 20%, that is, 0.5% ≦ (dye weight / thermoplastic polyurethane sample weight) ≦ 20%; and preferably between 5% to 10%, that is, 0.5% ≦ (dye weight / thermoplastic polyurethane sample weight) ≦ 10%.

In the dyeing method disclosed in this disclosure, the bath ratio of the thermoplastic polyurethane sample to water (ie, the weight of the thermoplastic polyurethane sample: the weight of water) may be between 1:20 and 1:40.

In the dyeing method disclosed in this disclosure, the thermoplastic polyurethane sample may be a thermoplastic polyurethane sample manufactured by 3D printing. In an embodiment of the present disclosure, the thermoplastic polyurethane sample can be applied to a midsole portion of a shoe.

The following is a description of the implementation of the disclosure through specific examples. Those skilled in the art can easily understand other advantages and effects of the disclosure from the content disclosed in the description. This disclosure can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed for different viewpoints and applications without departing from the spirit of this creation.

Unless otherwise stated in the text, the singular forms "a" and "the" used in the specification and the scope of the appended patent application include one or more entities.

Unless otherwise stated herein, the term "or" as used in the specification and the scope of the attached patent application generally includes the meaning of "and / or".

The present invention will be explained more specifically by examples, but these examples are not intended to limit the scope of the present invention. Unless otherwise specified, "%" used in the following Examples and Comparative Examples to indicate the content of ingredients and the amount of matter is based on weight.

The following Examples 1-6 and Comparative Examples 1-5 of the present disclosure were performed using a high-temperature stirring device. Wherein, the 3D printed thermoplastic polyurethane (TPU) or foamed polyurethane (foamed PU) material is cleaned; the cleaned material is put into the prepared dyeing solution for dyeing, and then dried. Among them, the dyes, auxiliaries, dye concentration ([dye / water] x 100%), auxiliary concentration ([auxiliary / water] x 100%), and dyeing concentration ( [Dye / material] x100%), bath ratio (material: water), temperature, time, and maximum depth of dyeing after dyeing are listed in Table 1 below.

As shown in the results of Comparative Examples 3 and 4 in Table 1, after the foamed PU material is dyed, the foamed PU is deformed due to the high dyeing temperature. As shown in the results of Examples 1 to 6 in Table 1, when the dyeing concentration is higher, the tinting strength is deeper; when the bath ratio is lower, the tinting strength is deeper; when the dyeing time is longer, the tinting strength is The higher the penetration depth, the higher the dyeing temperature and the higher the penetration strength and penetration depth. In particular, in the dyeing solution and dyeing method disclosed herein, disperse dyes and dyeing temperatures are the key factors that can mainly increase the wear resistance (depth of penetration) of the material. Therefore, use disperse dyeing Under high temperature and sufficient dyeing time, it can meet the penetration (dyeing depth) of more than 1mm, in order to increase the abrasive effect of the product.

The above embodiments are merely examples for the convenience of description. The scope of the rights claimed in this disclosure should be based on the scope of the patent application, rather than being limited to the above embodiments.

Claims (8)

A method for dyeing a thermoplastic polyurethane sample includes the following steps: (A) providing a dyeing solution including a dye and water, wherein the dye is a disperse dye; (B) heating the dyeing solution to a temperature above 90 ° C; (C) immersing a thermoplastic polyurethane sample in the dyeing solution after heating, and the soaking time is more than 10 minutes, wherein the thermoplastic polyurethane sample is a thermoplastic polyurethane sample manufactured by 3D printing; and (D) taking out the dyeing The thermoplastic polyurethane samples. The dyeing method according to item 1 of the scope of patent application, wherein in step (B), the dyeing solution is heated to 90 ° C to 130 ° C. The dyeing method according to item 1 of the patent application scope, wherein in the step (C), the soaking time is 30 minutes to 180 minutes. The dyeing method according to item 1 of the patent application range, wherein the weight ratio of the dye to the thermoplastic polyurethane sample is between 0.5% and 20%. The dyeing method according to item 1 of the patent application range, wherein the weight ratio of the dye to the thermoplastic polyurethane sample is between 5% and 10%. The dyeing method according to item 1 of the scope of the patent application, wherein the weight ratio of the thermoplastic polyurethane sample to water is between 1:20 and 1:40. The dyeing method according to item 1 of the patent application scope, wherein the thermoplastic polyurethane sample is applied to a midsole portion of a shoe. A dyeing solution is used for dyeing a thermoplastic polyurethane sample, wherein the dyeing solution includes: a dye and water, and the temperature at which the dyeing solution dyes the thermoplastic polyurethane sample is above 90 ° C; wherein the dye is A disperse dye, and the thermoplastic polyurethane sample is a thermoplastic polyurethane sample manufactured by 3D printing.