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

Treatment of part processed leather

A technology for tanning and fungicides, which is applied in the field of semi-raw leather processing, can solve problems such as damage to leather fiber structure, and achieve the effects of reducing health and safety hazards, simplifying operations, and avoiding environmental pollution problems.

Inactive Publication Date: 2005-05-18
CLARIANT UK
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although increasing the drum speed is good for mixing, the effect of the rotation is only best when it does not cause too much tension on the contents of the drum, otherwise it will damage the fiber structure of the 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
  • Treatment of part processed leather
  • Treatment of part processed leather
  • Treatment of part processed leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Tablets were prepared with 4 carrier materials: stearyl alcohol, 1,10-decanediol, 1,8-octanediol and 1,6-hexanediol. Each carrier was melt mixed with the active ingredient fungicide 2-(thiocyanatomethylthio)benzothiazole in a weight ratio of 4:1 to form a mixture containing 20% ​​by weight of the fungicide. The hot mixture is allowed to solidify in the molds to form tablets weighing approximately 1 g and 70 g.

[0043] Another set of tablets was prepared in the same proportions using the same vehicle and pigments used as visual markers.

Embodiment 2

[0045] In the laboratory, the leather and the obtained 1g tablet of Example 1 (the tablet can be broken into pieces as required, so that the weight ratio of the tablet to the leather to be treated is 0.05%) is placed in a small drum and rotated until the tablet The agent is completely dissolved.

[0046] Results showed that hexanediol and octanediol dissolved rapidly within the first 1.0-1.5 hours (hexanediol was faster than octanediol). Decanediol was not completely dissolved until the end of the 4-hour treatment, while in the case of stearyl alcohol a small amount of particles remained at this point. This is in perfect agreement with the respective relative solubilities of the four materials, with the most soluble species dissolving the fastest.

[0047] The test carried out with the 1 g tablet obtained in Example 1 containing the pigment dyed the leather with a distinct color, which shows that, under laboratory conditions, the obtained tablet allows the pigment to be evenl...

Embodiment 3

[0049] Twelve sheets of tanned wet blue were taken from the tannery, sided and labeled before neutralization. Half of each hide was treated with a 70 g tablet containing 20% ​​active fungicide (0.05% by weight of the hide), and the other half was treated with a conventional fungicide (0.1% by weight of the hide). Process overnight (including neutralization time). During this time, the temperature was maintained at 25°C, but was raised to 40°C during the last two hours. The leather is then returned to the factory where it is further processed to make hardside leather. Finally, an assessment is made as to whether fatty alcohols have an impact on the finished leather.

[0050] No visible effects were found on the leather. Subsequent pigment absorption and other physical properties are the same as other leathers from the same lot. It can be concluded that the new method of the present invention does not have any adverse effects on the subsequent treatment of the leather.

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

PropertyMeasurementUnit
melting pointaaaaaaaaaa
Login to View More

Abstract

The present invention improves the distribution of a compound, such as a fungicide, in a leather treatment solution by dispersing the compound in a sparingly water soluble carrier to form a solid tablet or block and then adding the compound in this form to the solution.

Description

technical field [0001] The present invention relates to a method of adding fungicides or the like to leather in a tanning vessel, and more particularly to formulations for such a treatment. Background technique [0002] Leather is made from raw hides stabilized with tanning agents. Vegetable tanning agents have traditionally been used for this, but chromium salts are increasingly being used; people are increasingly trafficking in wet blue leather (that is, wet leather that is sold without further treatment after (chrome) tanning). leather). However, the high water content and low pH of wet blue leather are very prone to mold growth. [0003] The easiest way to control mold is to use a fungicide. However, government agency bans limit the use of many conventional fungicides (for example, banning organomercury compounds and restricting the use of certain phenolics). This forced the leather industry to switch to other fungicides that were less ...

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 Patents(China)
IPC IPC(8): C14C3/06C14C3/28C14C9/00A01N25/34A01N43/78A01N43/80
CPCC14C3/06C14C3/28
Inventor R·斯托西克
Owner CLARIANT UK