Unlock instant, AI-driven research and patent intelligence for your innovation.

Level dyeing process of superfine fiber PU (Poly Urethane) synthetic leather

A technology of superfine fiber and synthetic leather, which is applied in the field of leather, can solve the problems of non-obvious difference and uneven dyeing of leather, and achieve the effect of enhancing color fastness, ensuring the quality of color use, and improving the dyeing rate

Inactive Publication Date: 2018-03-06
马多浩
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commercially available leather leveling agents have mostly the same composition as those for cotton, wool and silk, and the difference is not obvious, but the properties of leather such as density, thickness, and fiber structure are significantly different from those of cotton, wool and silk. , so the use of existing leather leveling agents will still cause uneven dyeing of leather

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Level dyeing process of superfine fiber PU (Poly Urethane) synthetic leather
  • Level dyeing process of superfine fiber PU (Poly Urethane) synthetic leather
  • Level dyeing process of superfine fiber PU (Poly Urethane) synthetic leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of leveling solution: Dissolve 2kg of leveling agent DC in 50kg of water, heat to 60-65°C and keep stirring for 15 minutes to obtain leveling solution;

[0041] (2) Synthetic leather pretreatment: put 80kg of superfine fiber PU synthetic leather to be dyed in an environment with a temperature of 50-55°C and a relative humidity of 65-70% for 2 hours, and then spray 10kg of synthetic leather on the surface of the synthetic leather for level dyeing After spraying, let it stand in an environment with a temperature of 75-80°C and a relative humidity of 55-60% for 1 hour;

[0042] (3) Dyeing and color fixation: Add 100kg of superfine fiber PU synthetic leather after pretreatment in the dyeing machine, add 5kg of dye yellow (I) and 1000kg of water at the same time, adjust the pH value to 7-7.5, and in 60-65 Dyeing at 85-90°C for 15 minutes, then heated to 85-90°C for 30 minutes, adjusted the pH value to 5-5.5, continued to dye at 85-90°C for 15 minutes, then ad...

Embodiment 2

[0046] (1) Preparation of leveling liquid: Dissolve 5kg of leveling agent 1227 in 100kg of water, heat to 60-65°C and stir for 15 minutes to obtain leveling liquid;

[0047] (2) Synthetic leather pretreatment: put 100kg of superfine fiber PU synthetic leather to be dyed in an environment with a temperature of 50-55°C and a relative humidity of 65-70% for 2 hours, and then spray 15kg of synthetic leather on the surface of the synthetic leather for level dyeing After spraying, let it stand in an environment with a temperature of 75-80°C and a relative humidity of 55-60% for 1 hour;

[0048] (3) Dyeing and color fixing: Add 150kg of pretreated superfine fiber PU synthetic leather into the dyeing machine, add 5kg of dye red (II) and 1500kg of water at the same time, adjust the pH value to 7-7.5, and dry it at 60-65 Dyeing at 85-90°C for 15 minutes, then heated to 85-90°C for 30 minutes, adjusted the pH value to 5-5.5, continued to dye at 85-90°C for 15 minutes, then added the fixi...

Embodiment 3

[0052] (1) Preparation of leveling solution: Dissolve 5kg of leveling agent BOF in 100kg of water, heat to 60-65°C and keep stirring for 15 minutes to obtain leveling solution;

[0053] (2) Synthetic leather pretreatment: put 100kg of superfine fiber PU synthetic leather to be dyed in an environment with a temperature of 50-55°C and a relative humidity of 65-70% for 2 hours, and then spray 15kg of synthetic leather on the surface of the synthetic leather for level dyeing After spraying, let it stand in an environment with a temperature of 75-80°C and a relative humidity of 55-60% for 1 hour;

[0054] (3) Dyeing and color fixing: Add 150kg of pretreated superfine fiber PU synthetic leather into the dyeing machine, add 5kg of dye red (II) and 1500kg of water at the same time, adjust the pH value to 7-7.5, and dry it at 60-65 Dyeing at 85-90°C for 15 minutes, then heated to 85-90°C for 30 minutes, adjusted the pH value to 5-5.5, continued to dye at 85-90°C for 15 minutes, then ad...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a level dyeing process of a superfine fiber PU (Poly Urethane) synthetic leather. The level dyeing process of the superfine fiber PU (Poly Urethane) synthetic leather relates to the technical field of leathers, and comprises the following operation steps of (1) preparing a level dyeing liquor; (2) pretreating the synthetic leather; (3) dye fixing; (4) carrying out high-temperature fixation; (5) water washing and drying. According to the level dyeing process provided by the invention, the dye-uptake rate and the dye uniformity of a dye can be remarkably improved, a K / S value under 460nm is larger than 4, and a DEcmc value is smaller than 0.3; meanwhile, the color fastness of the PU synthetic leather is improved, the dry rubbing fastness achieves grade 4 to 5, and thewet rubbing fastness achieves grade 4 to 4.5, so that the color use quality of the synthetic leather is ensured.

Description

Technical field: [0001] The invention relates to the technical field of leather, in particular to a level dyeing process of superfine fiber PU synthetic leather. Background technique: [0002] Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as its substitute material. At present, synthetic leather mainly includes two categories: PU synthetic leather and PVC synthetic leather. PU synthetic leather, that is, polyurethane synthetic leather, uses non-woven fabric or woven fabric as the substrate, and weaves high-quality products through multiple treatments. The physical structure is close to that of natural leather, and it has many advantages that PVC synthetic leather cannot match. It is an ideal material to replace natural leather. [0003] Microfiber PU synthetic leather is the third generation of artificial leather. Its three-dimensional structure network non-woven fabric creates the conditions for synt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/10D06P1/52D06P1/613D06P1/649D06P1/651D06P1/655D06P5/20D06B21/00
Inventor 马多浩
Owner 马多浩