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Antibacterial leather, preparation method and application

A leather, parts by weight technology, applied in chemical instruments and methods, biocide-containing paints, coatings, etc., can solve problems such as application limitations, targeted improvement of environmentally friendly synthetic leather, environmental human injury, etc., to improve mechanical performance, improved wash-off resistance, and the effect of reducing usage

Active Publication Date: 2019-06-28
XIAMEN XINCHUANGLI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods all will use solvent-based polyurethane resin in the production process, because the solvent-based polyurethane resin contains a large amount of poisonous and harmful chemical solvents such as dimethylformamide (DMF), toluene, methyl ethyl ketone, etc. Human body can cause great damage
[0003] After a lot of research and development work, the applicant has developed an environmentally friendly synthetic leather made of organic silica gel and environmentally friendly auxiliary materials, but has not made targeted improvements to the environmentally friendly synthetic leather for a specific application scenario. restricted

Method used

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  • Antibacterial leather, preparation method and application
  • Antibacterial leather, preparation method and application
  • Antibacterial leather, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of antibacterial leather top layer:

[0042] Take 80-100 parts of organic silica gel, 8-10 parts of hardener, 10-30 parts of modified layered double metal hydroxide, and 3-5 parts of carboxymethyl chitosan silver to form a primary slurry;

[0043] Use 4-9 parts of high-viscosity simethicone oil with a viscosity value of 100-300mPa·s / 25°C to adjust the viscosity of the primary slurry to 100000-120000mPa·s / 25°C to form a secondary slurry;

[0044] Take a certain amount of modified nano-silica and mix it into the secondary slurry with adjusted viscosity, fully stir to form a third slurry, the parts by weight of the modified nano-silica are the same as the modified layered bimetallic The ratio of the parts by weight of the hydroxide is not less than 8%, and the ratio of the parts by weight of the modified nano-silica to the total parts by weight is not more than 1.9%;

[0045] Coat the three-time slurry on the surface of the release paper / film with a coating th...

Embodiment 2

[0077] In this embodiment, the modified layered double metal hydroxide used in this application will be described.

[0078] Modified layered double metal hydroxide: sodium stearate and layered double metal hydroxide (neutral pH value) are added to the reaction kettle according to the proportioning of (3-5): 100 parts by weight, at 75- Stir in the temperature range of 85°C for 1 hour, and ultrasonically disperse once at intervals of 10-15 minutes, each time for 3-5 minutes.

[0079] Effect of ratio on activation index:

[0080] Addition amount of sodium stearate

[0081] Applicant finds in research, initially along with the increase of sodium stearate, activation index rises sharply, but when sodium stearate increases to about 5% of layered double metal hydroxide content, its activation index tends to When it is stable (close to 1), it continues to increase at this time, and the activation index tends to be stable. At the same time, excessive sodium stearate will af...

Embodiment 3

[0086] Preparation of modified silica: Add a certain amount of propyltrimethylsilane (KH560) into the hydrolyzate and hydrolyze it for 30±5min at a temperature of 70-75°C to obtain a hydrolysis reactant; add a certain amount of nano-silica (10-30nm) Add a certain amount of absolute ethanol, ultrasonically disperse for 10-15min to obtain a dispersion; heat the hydrolyzed reactant and dispersion to 80-85°C in the reactor, stir at constant temperature for 4H, then cool to room temperature, Obtaining the cooling liquid; centrifuging the cooling liquid and drying to constant humidity to obtain modified nano silicon dioxide;

[0087] The hydrolyzate is prepared from ethanol with a volume fraction greater than 75% and hydrochloric acid with a concentration of 0.1mol / L at a volume ratio of 1:1;

[0088] The addition ratio of each material is as follows:

[0089] Propyltrimethylsilane

[0090] Effect of ratio on activation index:

[0091] Propyltrimethylsilane

[...

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Abstract

The invention discloses antibacterial leather and a preparation method thereof. The leather takes organic silica gel as the main component, silver carboxymethyl chitosan serves as an antibacterial factor, modified nano-silica and modified layered bimetallic oxide serve as the flame retardant factors, by means of the synergistic effect of all components, such as a good combination effect of silvercarboxymethyl chitosan and a substrate, a synergistic flame retardant effect between the flame retardant factors, a bonding effect between modified nano-silica and dimethyl silicone oil and a synergistic effect between high-viscous dimethyl silicone oil and low-viscous dimethyl silicone oil, the process is improved, good antibacterial and flame retardant properties and other properties are obtained, both the mechanical property and environmental protection requirements of the material are achieved, the performance requirements of leather materials such as bags, shoes and clothing, sports equipment and medical equipment can be met, and the leather has broad market prospects.

Description

technical field [0001] The invention relates to the field of leather material preparation, in particular to an antibacterial leather, a preparation method and an application. Background technique [0002] At present, the production processes of artificial leather and synthetic leather at home and abroad are mainly divided into dry polyurethane tanning process, wet polyurethane tanning process and water-based polyurethane process. These methods all will use solvent-based polyurethane resin in the production process, because the solvent-based polyurethane resin contains a large amount of poisonous and harmful chemical solvents such as dimethylformamide (DMF), toluene, methyl ethyl ketone, etc. The human body can cause great harm. [0003] After a lot of research and development work, the applicant has developed an environmentally friendly synthetic leather made of organic silica gel and environmentally friendly auxiliary materials, but has not yet made targeted improvements t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/06B32B29/00B32B33/00B32B3/24B32B1/06C09D183/04C09D7/61C09D7/65
CPCD06N3/0059D06N3/128C08G77/02C09D183/02D06N2209/1671D06N2211/28C09D7/80D06N3/0097B05D3/0209B05D7/546C09D183/04C09D7/62C09D5/14C09D7/65
Inventor 陈偲勇许明辉
Owner XIAMEN XINCHUANGLI CHEM CO LTD
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