Leather attaching crack treating agent and preparation method thereof

Abstract

The invention provides a leather attaching crack treating agent and a preparation method thereof. The leather attaching crack treating agent comprises the following raw materials in parts by weight: a larch-keratin composite filler, a nano silicon dioxide particle filling agent, a defoaming agent, an adhesion film forming agent, a nonionic fatting agent, a surfactant, a cross-linked metal cation salt and deionized water. No special crack treating agent for leather attachment of manual vegetable tanned leather exists on the market, the product is suitable for physical manual edge sealing of vegetable tanned leather and semi-vegetable tanned leather, and the problem of edge sealing treatment of a product is solved for the first time. The leather attaching crack treating agent has a wide application value and popularization value, and has a relatively large market prospect. The leather attaching crack treating agent is prepared from harmless high-molecular synthetic substances and natural protein modified substances, so that use performance is good, no harm is caused to human bodies and the environment, and the leather attaching crack treating agent is a green water-soluble product.

Description

technical field [0001] The invention relates to the field of leather chemical engineering, in particular to a leather bonding crack treatment agent and a preparation method thereof. Background technique [0002] Leather can be divided into two basic categories according to the tanning method: chrome tanned leather and vegetable tanned leather. Among them, the edge banding of chrome tanned leather generally uses oil-based or water-based edge banding agent, which can quickly and naturally form on the edge of chrome tanned leather, and generally does not produce cracks and cracks. Vegetable tanned leather is a kind of leather tanned with natural tannins. It does not contain toxic substances, has a high cortical density and good formability, and can be used to make leather products by hand. However, in the process of using vegetable tanned leather and edge banding, there is a common situation, that is, if oily or water-based edge banding agents are not used, although the origin...

AI Technical Summary

Problems solved by technology

However, in the process of using vegetable tanned leather and edge banding, there is a common situation, that is, if oily or water-based edge banding agents are not used, although the original natural color and style of the leather can be retained, but Unexpected cracks and grooves will appear when the leather is bonded to the leather. In this case, the uneven surface will still appear after grinding or common colorless edge banding agent treatment. Even if the edge is ironed, it still cannot be eliminated , which will adversely affect the quality and appearance of the finished product, reducing the added value of the finished product

[0003] There are many reasons for the lamination cracks of vegetable tanned leather. The main factors are as follows: First, the original oil content in the leather is not rich enough, so excess oil will It cannot seep out, so that it cannot cover the cracks and dents that appear during lamination; second, the adhesive force of the glue is not enough during lamination, and the lamination cracks penetrate under the action of external force after molding and lamination, or when a solution seeps in. Cracking; third, the quality of the leather itself, the state of the collagen fiber is relatively loose, resulting in a loose state of the fiber when the leather is pasted, and dents appear under the action of external force and grinding. Fourth, there will be excess glue on the edge of the leather when pasting Exudation, if not removed, will remain at the seam, no matter how polished it is, it cannot be removed, leaving cracks or grooves