阅读说明：本技术 一种3d立体印花布料及其制备方法 (3D printed fabric and preparation method thereof ) 是由 游训 托马斯·沃尔特施密特 李天源 吴剑晗 庄丽君 王富城 王桩桩 丘梅英 林鹏 于 2020-07-02 设计创作，主要内容包括：本发明提供一种3D立体印花布料的制备方法,包括以下步骤：发泡涂料的制备：将水性聚氨酯树脂、发泡剂和助剂先配制成基料,然后加入固化剂发泡7-9min,再加入色浆发泡1-3min,制备发泡涂层；所述水性聚氨酯树脂、发泡剂和固化剂的质量比为90-110:3-5:2-3；所述发泡剂包括脂肪酸铵盐类泡沫促进剂和磺基琥珀酰胺钠盐表面活性剂；丝网印刷：将制备好的发泡涂料在30min内通过网版在布料基面上印制涂层；所述网版的厚度为2-4mm；固化：将带涂层的布料进行干燥固化,得到3D立体印花布料。技术方案中发泡涂料对基材渗透性强,在成膜过程中可以形成牢固的结构,附着力强,极难脱落；同时,该涂层具有柔软的触感,良好的耐挠、耐磨、抗冲击等性能,在使用过程中,涂层不易破裂。(The invention provides a preparation method of a 3D printed fabric, which comprises the following steps: preparing a foaming coating: preparing base materials from the waterborne polyurethane resin, the foaming agent and the auxiliary agent, adding the curing agent for foaming for 7-9min, and then adding the color paste for foaming for 1-3min to prepare a foaming coating; the mass ratio of the waterborne polyurethane resin to the foaming agent to the curing agent is 90-110:3-5: 2-3; the foaming agent comprises a fatty acid ammonium salt foam promoter and a sulfosuccinamide sodium salt surfactant; screen printing: printing a coating on the cloth base surface by the prepared foaming coating through a screen within 30 min; the thickness of the screen printing plate is 2-4 mm; and (3) curing: and drying and curing the cloth with the coating to obtain the 3D printed cloth. In the technical scheme, the foaming coating has strong permeability to a base material, can form a firm structure in a film forming process, has strong adhesive force and is extremely difficult to fall off; meanwhile, the coating has soft touch feeling, good flexibility resistance, wear resistance, shock resistance and other performances, and is not easy to break in the using process.)

1. A preparation method of 3D printed cloth is characterized by comprising the following steps:

preparing a foaming coating: preparing base materials from the waterborne polyurethane resin, the foaming agent and the auxiliary agent, adding the curing agent for foaming for 7-9min, and then adding the color paste for foaming for 1-3min to prepare a foaming coating; the mass ratio of the waterborne polyurethane resin to the foaming agent to the curing agent is 90-110:3-5: 2-3; the foaming agent comprises a fatty acid ammonium salt foam promoter and a sulfosuccinamide sodium salt surfactant;

screen printing: printing a coating on the cloth base surface by the prepared foaming coating through a screen within 30 min; the thickness of the screen printing plate is 2-4 mm;

and (3) curing: and drying and curing the cloth with the coating at 15-30 ℃ to obtain the 3D printed cloth.

2. The preparation method according to claim 1, wherein the mass ratio of the ammonium fatty acid salt foam promoter to the sodium sulfosuccinamide surfactant is 3-4: 2-6.

3. The method of claim 1, wherein the curing agent comprises isocyanate, carbodiimide and aziridine.

4. The method according to claim 1, wherein the auxiliary agent is a thickener and/or a leveling agent.

5. The method according to claim 1, wherein the pores of the cloth used as the base surface of the coating layer have a diameter of less than 1 mm.

6. The method of claim 1, comprising the steps of:

preparing a foaming coating: preparing base materials from the waterborne polyurethane resin, the auxiliary agent and the foaming agent, adding the curing agent, mixing for 8min, and adding the color paste for foaming for 2min to prepare a foaming coating; the mass ratio of the waterborne polyurethane resin to the foaming agent to the curing agent is 100:3: 2; the foaming agent comprises 2 parts by mass of fatty acid ammonium salt foam promoter and 1 part by mass of sulfosuccinamide sodium salt surfactant;

screen printing: printing a coating on the cloth base surface by the prepared foaming coating through a screen within 30 min; the thickness of the screen printing plate is 3-4 mm;

and (3) curing: and drying and curing the cloth with the coating at 15-30 ℃ to obtain the 3D printed cloth.

7. A3D three-dimensional printed cloth, characterized in that the three-dimensional printed cloth is prepared by the preparation method of any one of claims 1 to 6.

8. The 3D solid printed cloth according to claim 7, wherein the 3D solid printed cloth has a thickness of 1-3 mm.

Technical Field

The invention relates to the field of textiles, in particular to a 3D printed fabric and a preparation method thereof.

Background

At present, the printing of the vamp mostly uses the poly-amino acid or acrylic acid sizing agent, generally adopts a 60-120 mesh screen, and prepares a superposed coating through several to dozens of screen printing, thereby realizing the printing design and 3D effect printing with various effects. However, the traditional screen printing process is not easy to prepare thicker superposed coatings, and the thickness of the superposed coatings reaches 1mm and needs up to 30 printing procedures, so that the thickness of 3D printing is 0.6-1.2mm generally. The laminated coating with the thickness of more than 1.2mm is rigid, the coating is easy to crack and fall off after being slightly bent, the laminated coating is not suitable for processing the shoe upper, and the laminated coating are easy to crack. In addition, the flexibility of the superposed coating is insufficient, the impact resistance is insufficient, and when the sports are used for violent sports, such as playing football, the surface coating is easy to break under the action of external force with impact, so that the service life of the shoe is shortened.

Disclosure of Invention

Therefore, a 3D stereoscopic printed cloth capable of bearing a large impact external force and a preparation method thereof are needed.

To achieve the object of the first aspect of the present invention, the inventors provide a method for preparing a 3D stereoscopic printed cloth, comprising the steps of:

preparing a foaming coating: preparing base materials from the waterborne polyurethane resin, the foaming agent and the auxiliary agent, adding the curing agent for foaming for 7-9min, and adding the color paste for foaming for 1-3min to prepare a foaming coating; the mass ratio of the waterborne polyurethane resin to the foaming agent to the curing agent is 90-110:3-5: 2-3; the foaming agent comprises a fatty acid ammonium salt foam promoter and a sulfosuccinamide sodium salt surfactant;

screen printing: printing a coating on the cloth base surface by the prepared foaming coating through a screen within 30 min; the thickness of the screen printing plate is 2-4 mm;

and (3) curing: and drying and curing the cloth with the coating at 15-30 ℃ to obtain the 3D printed cloth.

In order to achieve the object of the second aspect of the present invention, the inventors provide a 3D three-dimensional printed cloth prepared by the preparation method of the first aspect of the present invention.

Different from the prior art, the technical scheme adopts the water-based polyurethane resin, the fatty acid ammonium salt foam accelerator and the sodium sulfosuccinamide salt as the foaming agent and the curing agent to be mixed to obtain the foaming coating, and the cloth substrate is subjected to a primary printing process to obtain the 3D three-dimensional printing coating with the thickness of 1-3 mm. The foaming coating has strong permeability to base materials, can form a firm structure in the film forming process, has strong adhesive force and is extremely difficult to fall off; meanwhile, the coating has soft touch feeling, good flexibility resistance, wear resistance, shock resistance and other performances, and is not easy to break in the using process.

Drawings

FIG. 1 is a 3D solid printed cloth prepared in example 1.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

In this embodiment, the waterborne polyurethane was purchased from 5116 emulsion of Wanhua chemistry, the solid content was 52%, and the glass transition temperature was-40 ℃.

In this embodiment, the isocyanate curing agent is commercially available, available from Wanhua Chemicals, model 163; carbodiimide was purchased from Japanese Konjac, model V08; aziridine was purchased from Polydont chemical, model CF 100.

In a first aspect of the present invention, the inventors provide a method for preparing a 3D stereoscopic printed cloth, comprising the following steps:

preparing a foaming coating: preparing base materials from the waterborne polyurethane resin, the foaming agent and the auxiliary agent, adding the curing agent for foaming for 7-9min, and adding the color paste for foaming for 1-3min to prepare a foaming coating; the mass ratio of the waterborne polyurethane resin to the foaming agent to the curing agent is 90-110:3-5: 2-3; the foaming agent comprises a fatty acid ammonium salt foam promoter and a sulfosuccinamide sodium salt surfactant;

screen printing: printing a coating on the cloth base surface by the prepared foaming coating through a screen within 30 min; the thickness of the screen printing plate is 2-4 mm;

and (3) curing: and drying and curing the cloth with the coating at 15-30 ℃ to obtain the 3D printed cloth.

The method comprises the steps of mixing waterborne polyurethane resin, fatty acid ammonium salt foam accelerator and sodium sulfosuccinamide as foaming agents and curing agents to obtain a foaming coating, and conducting a printing process on a cloth substrate for one time to obtain a 1-3mm 3D three-dimensional printing coating. The foaming coating has strong permeability to base materials, can form a firm structure in the film forming process, has strong adhesive force and is extremely difficult to fall off; the obtained foaming coating has soft touch feeling, good flexibility resistance, wear resistance, shock resistance and other properties, and is not easy to break in the using process.

Further, the mass ratio of the fatty acid ammonium salt foam promoter to the sulfosuccinamide sodium salt surfactant is 3-4: 2-6.

When the foaming agent only uses the fatty acid ammonium salt foam accelerator, the system foaming is mainly macroporous bubbles. If no curing agent is used, an obvious partial defoaming phenomenon can occur within 60min after the foaming is finished; when the foaming agent only contains sodium sulfosuccinamide, the foaming is mainly small-hole bubbles. If no curing agent is present, the phenomenon that small bubbles are obviously gathered into large bubbles and then defoamed can be seen within 60min after foaming is finished.

The inventor can control the foam structure and the total amount of foam by adjusting the amount of the foaming agent and the foaming time. When the mass ratio of the fatty acid ammonium salt foam promoter to the sulfosuccinamide sodium salt surfactant is 3-4: 2-6, the system foaming comprises macroporous bubbles and microporous bubbles; the polyurethane system can be fully expanded, and the hardness of the product can also meet the requirement.

Further, the curing agent includes isocyanate, carbodiimide and aziridine. The curing agent is crosslinked with the resin, so that more than 90% of foam in the system can be stabilized, and the condition that the thickness and the hardness of the coating are influenced by defoaming of the foamed foam is avoided.

When the isocyanate curing agent is used, the foamed material can be stably constructed for less than 30min, and color difference and appearance and hardness performance change can occur after the construction time exceeds the time; and the use of aziridine can prolong the construction time to 60 min.

Further, the auxiliary agent is a thickener and/or a leveling agent.

The inventor can also adjust the viscosity, thixotropy and leveling ability of the product by adjusting the types and the dosage of the thickening agent and the leveling agent of the coating formula.

Furthermore, the aperture of the holes on the cloth used as the base surface of the coating is less than 1 mm.

The cloth used as the base of the coating may be either non-porous or woven with pores. The foaming coating has strong permeability to the cloth and can permeate into the surface layer of the cloth to form a cross-linked composite structure with the cloth. If the aperture of the holes on the cloth is larger than 1mm, the appearance of the coating is affected by the hole parts.

The material of the cloth may include all man-made fibers including: terylene, spandex, chinlon and acrylon. The cloth also comprises a single layer, a plurality of layers and sandwich mesh cloth.

In a second aspect of the present invention, the inventors also provide a 3D stereoscopic printed cloth, which is prepared by the preparation method of the first aspect of the present invention.

Further, the thickness of the 3D stereoscopic printing coating of the 3D stereoscopic printing cloth is 1-3 mm.