Release paper taking stearate as release agent

Abstract

The invention discloses release paper taking stearate as a release agent. The release paper includes base paper, an anti-permeation primer layer and a release layer which are sequentially composited,and the release layer takes the stearate as the release agent and takes polyvinyl alcohol resistant to high temperature as a resin. The release layer comprises, by weight parts, 100-300 parts of polyvinyl alcohol solution, 0-20 parts of alkyd resin, 2-30 parts of stearate release agent, 2-36 parts of matting agent, 1-10 parts of coating aid and 30-200 parts of water. The release paper is characterized by resisting high temperature, can be applied to a process of production of PU, PVC and PU / PVC composite artificial leather at the same time, the coating amount is low, the release paper is not curled, and the peeling strength can be adjusted for different artificial leather resins.

Description

technical field [0001] The invention relates to the field of leather processing and manufacturing, in particular to a release paper for artificial leather and a manufacturing method thereof. Background technique [0002] Leather release paper, also known as transfer paper, is an indispensable carrier in the production process of artificial leather and synthetic leather. It can transfer the pattern embossed on it to artificial leather and synthetic leather. When in use, polyurethane (PU) and polyvinyl chloride (PVC) resins are coated on the surface of this type of release paper in the form of a solution, and then dried, cross-linked, and cured, and then peeled off from the release paper to obtain Smooth or embossed faux leather. [0003] In the prior art, the release paper is composed of the base paper and the release coating on it. In order to improve the smoothness of the paper surface and prevent the surface coating from penetrating, some processes require coating a layer...

AI Technical Summary

Problems solved by technology

[0005] (1) Polyolefin (polyethylene, polypropylene) is used as the release material. The release paper has poor temperature resistance and the maximum operating temperature is 140°C. It is only suitable for PU artificial leather process, but cannot meet the process conditions of PVC and PU / PVC composite artificial leather.

The Chinese invention patent with the publication number CN 103866649A discloses a high-temperature-resistant release paper and its preparation process. The release paper release material is low-density polyethylene and high-density polyethylene, and the obtained release paper has high brightness. , high strength, low peeling force, but its maximum temperature resistance can only reach 135 ℃

In addition, the release paper containing polyolefin release layer is coated by coating process in the production process, the coating amount is high, and the release paper is easy to curl during use

[0006] (2) Using polysiloxane as a release material, due to its poor adhesion to PU resin, is not conducive to PU resin film formation, and is prone to pre-peeling; and for artificial leather resins of different materials and compositions, the peeling strength will vary. There is a difference. For the hard-to-peel artificial leather resin, the peeling strength of the release paper is required to be lower, while for the easy-peelable artificial leather resin, the peeling strength is required to be higher. At present, several release materials cannot achieve controllable peeling. strength

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