Polyurethane superfine fiber synthetic leather with multicolor three-dimensional effect

Abstract

The invention relates to polyurethane superfine fiber synthetic leather with a multicolor three-dimensional effect. The polyurethane superfine fiber synthetic leather comprises a polyurethane superfine fiber base cloth layer and a polyurethane coating adhered to one side of the base cloth layer; recesses with three-dimensional structures are formed in the surface of the synthetic leather in the direction from the outer side of the polyurethane coating to the base cloth layer; any cross section of each recess is in the same trapezoid shape; the depth H of each recess is larger than or equal to0.03 time of the thickness of the polyurethane coating; the inner angle theta of the lower bottom of each trapezoid ranges from 95 degrees to 150 degrees; the length L of the upper bottom of each trapezoid ranges from 0.0001 mm to 100 mm; when the depth of the recesses or the lengths of the upper bottom and the lower bottom of the trapezoid are less than or equal to 0.001 mm, the size deviation is+/-10%; and when the depth of the recesses or the lengths of the upper bottom and the lower bottom of the trapezoid are more than 0.001 mm, the size deviation is +/-5%; and the theta angle deviationis +/-0.5 degrees. According to the polyurethane superfine fiber synthetic leather, the recesses with the special trapezoidal structure are adopted as the minimum pattern structure units, so that thedimensional precision of the customized patterns can be met through a laser engraving technology, the strong multicolor stereoscopic impression is achieved, the pattern expression is accurate, and themulticolor effect is fine and smooth.

Description

technical field [0001] The invention belongs to the technical field of polyurethane superfine fiber synthetic leather, and relates to a polyurethane superfine fiber synthetic leather with multicolor three-dimensional effect. Background technique [0002] Polyurethane microfiber synthetic leather (referred to as microfiber leather) has a three-dimensional structure similar to natural leather, so it has excellent texture and soft feel. It has been widely used in automotive interiors, furniture, interior decoration, and high-end shoes. and other fields. [0003] The texture and color of the surface of the conventional polyurethane microfiber synthetic leather are mainly realized by transfer coating. In order to realize the three-dimensional effect of the surface of the polyurethane microfiber synthetic leather, the prior art mainly achieves it by embossing. Making the synthetic leather surface have a three-dimensional effect through embossing will change the texture and feel o...

AI Technical Summary

Problems solved by technology

Making the synthetic leather surface have a three-dimensional effect through embossing will change the texture and feel of the synthetic leather, making the synthetic leather harder, and the three-dimensional effect produced by embossing is relatively rough and not delicate. The depth of the three-dimensional leather grain is limited by the production conditions and cannot be accurate. control

[0004] Regarding the two-color effect, the patent ZL 201020200025.3 discloses a method for obtaining a two-color effect by spraying after embossing. Although the synthetic leather disclosed in this patent has a two-color effect, it is a rough two-color effect, and there is no clear two-color effect. dividing line

In addition, the two-color effect of the synthetic leather disclosed in this patent is difficult to control. The place where there is more spray paint has a darker color, and the place where there is less spray paint has a lighter color.

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