CN114517416A - PU double-layer crystal mirror surface leather and laminating method thereof - Google Patents

Abstract

The invention discloses a PU double-layer crystal mirror leather and a laminating method thereof, comprising the following steps: step 1: coating a wet-process PU layer on a base cloth; step 2: coating a dry-process PU texture layer on a wet-process PU layer Above the PU layer; Step 3: Overprint the printing layer on the dry PU texture layer to obtain the first-stage semi-finished product; Step 4: Coat the transparent color polyurethane elastomer slurry on the mirror release paper and dry to form a transparent color polyurethane elastic The second stage semi-finished product is obtained; Step 5: Inject the auxiliary agent on the printing layer of the first stage semi-finished product and then attach the second stage The adhesive layer of the semi-finished product; Step 6: Expel the air bubbles out of the composite outer surface of the first-stage semi-finished product and the second-stage semi-finished product, and then make PU double-layer crystal mirror leather by laminating-drying-cooling in sequence. It is designed through various steps, which has the advantages of strong crystal feeling and good permeability.

Description

PU double-layer crystal mirror leather and its bonding method

technical field

The invention relates to the technology in the field of synthetic leather production, in particular to a PU double-layer crystal mirror leather and a bonding method thereof.

Background technique

PU synthetic leather, also known as polyurethane synthetic leather, is generally composed of base fabric and polyurethane coating layer. It is widely used in luggage, clothing, shoes, vehicles and furniture. Its wide application range, large quantity and variety are traditional Natural leather cannot be satisfied, but the existing PU double-layer crystal mirror products cannot be widely produced and used, mainly due to the reasons of polyurethane itself, its production is prone to bubbles and blank spots, resulting in poor permeability, low efficiency and high cost. There are few selected textures, generally only suitable for fine textures, and slightly deeper textures are prone to abnormality.

Therefore, it is necessary to study a new technical solution to solve the above problems.

SUMMARY OF THE INVENTION

In view of this, the present invention is aimed at the deficiencies existing in the prior art, and its main purpose is to provide a PU double-layer crystal mirror leather and a bonding method thereof, which increase the crystal of the product through the design of each layer structure and manufacturing steps. Feel the permeability and softness, reduce the abnormality of the original bubbles, improve the permeability and efficiency, the laminated PU double-layer leather has strong crystal feeling, good permeability, very few bubbles, good hand feeling, production High efficiency and low cost.

To achieve the above object, the present invention adopts the following technical scheme:

The utility model relates to a PU double-layer crystal mirror leather, which comprises a base cloth, a wet-process PU layer, a dry-process PU texture layer, a printing layer, an adhesive layer, and a transparent-colored polyurethane elastomer which are compounded sequentially from bottom to top.

A method for laminating the above-mentioned PU double-layer crystal mirror leather, comprising the following steps:

Step 1: Coat the wet PU layer on the base cloth;

Step 2: coating the dry PU texture layer on the wet PU layer;

Step 3: Overprint the printing layer on the dry PU texture layer to obtain the first-stage semi-finished product;

Step 4: Coating the transparent color polyurethane elastomer slurry on the mirror surface release paper and drying to form a transparent color polyurethane elastomer, coating the polyurethane slurry on the transparent color polyurethane elastomer and drying it semi-dry as an adhesive layer to obtain the first step. Second-stage semi-finished products;

Step 5: Inject the auxiliary agent on the printing layer of the first-stage semi-finished product and then attach the adhesive layer of the second-stage semi-finished product;

Step 6: Expel the air bubbles out of the composite outer surface of the first-stage semi-finished product and the second-stage semi-finished product, and then make PU double-layer crystal mirror leather by laminating-drying-cooling in sequence.

As a preferred solution, in step 1: first, pre-wet the base cloth, after pre-wetting, squeeze dry-ironing to keep the moisture content of the base cloth at 80%-95%; The cloth is coated with PU wet-process slurry, and then successively passes through coagulation-washing-drying to prepare a PU wet substrate.

As a preferred solution, the base fabric is pre-wetted with a pre-wetting liquid.

As a preferred solution, the pre-wetting liquid is a 10%-25% DMF aqueous solution.

As a preferred solution, the printing layer is a two-color printing layer.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solutions that it mainly adopts transparent color polyurethane elastomer resin to increase the number of products through the design of each layer structure and production steps. The crystal-like permeability and soft feeling are improved, and additives are injected on the surface of the dry-laid texture, and then the transparent-colored polyurethane elastomer is pasted to expel the air bubbles from the surface of the PU leather, reducing the abnormality of the original air bubbles and improving the permeability and efficiency. , At the same time, the laminated PU double-layer leather has the advantages of strong crystal feeling, good permeability, little bubble generation, good hand feeling, high production efficiency and low cost.

In order to illustrate the structural features and effects of the present invention more clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Description of drawings

1 is a cross-sectional view of a first-stage semi-finished product according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the second-stage semi-finished product according to the embodiment of the present invention (laminating the release paper);

FIG. 3 is a sectional view of the finished product (laminated release paper) according to an embodiment of the present invention;

4 is a sectional view of a finished product of an embodiment of the present invention (removal of release paper);

FIG. 5 is a sectional view of the finished product (after tearing off the release paper) according to an embodiment of the present invention.

Description of drawings:

10. Base fabric 20. Wet PU layer

30. Dry PU texture layer 40. Printing layer

50. Adhesive layer 60. Transparent color polyurethane elastomer

70. Release paper.

Detailed ways

Please refer to FIG. 1 to FIG. 5 , which show the specific structure of the embodiment of the present invention.

A PU double-layer crystal mirror leather, comprising a base cloth 10, a wet-process PU layer 20, a dry-process PU texture layer 30, a printing layer 40, an adhesive layer 50, and a transparent-colored polyurethane elastomer, which are sequentially compounded from bottom to top. 60. Use transparent color polyurethane elastomer resin to increase the crystal transparency and softness of the product, and inject additives on the surface of the dry layer texture and then paste the transparent color polyurethane elastomer 60 to expel the air bubbles out of the PU Leather surface, reduce the abnormality of original bubbles and improve the permeability and efficiency.

The method for laminating the PU double-layer crystal mirror leather comprises the following steps:

Step 1: coating the wet PU layer 20 on the base cloth 10;

Step 2: coating the dry PU texture layer 30 on the wet PU layer 20;

Step 3: Overprint the printing layer 40 on the dry PU texture layer 30 to obtain the first-stage semi-finished product;

Step 4: Coating transparent color polyurethane elastomer slurry on the mirror surface release paper 70 and drying to form a transparent color polyurethane elastomer 60, coating polyurethane slurry on top of the transparent color polyurethane elastomer 60 and drying semi-dry as an adhesive layer 50. Obtain the second-stage semi-finished product;

Step 5: injecting the auxiliary agent on the printing layer 40 of the first-stage semi-finished product, and then attaching the adhesive layer 50 of the second-stage semi-finished product;

Step 6: Expel the air bubbles out of the composite outer surface of the first-stage semi-finished product and the second-stage semi-finished product, and then sequentially pass lamination-drying-cooling to make PU double-layer crystal mirror leather, and the laminated PU double-made Layer leather has the advantages of strong crystal feeling, good permeability, very few bubbles, good hand feeling, high production efficiency and low cost.

Preferably, the printing layer is a two-color printing layer.

In this embodiment, in step 1: first, the base fabric 10 is pre-wetted, and the base fabric 10 is pre-wetted with a pre-wet solution, the pre-wet solution is a 10%-25% DMF aqueous solution. Squeeze dry-ironing to keep the moisture content of the base cloth at 80%-95%; then, coat the wet PU slurry on the soaked base cloth 10, and then sequentially pass through coagulation-washing-drying to make PU wet substrate.

The key point of the design of the present invention is that it mainly adopts the transparent color polyurethane elastomer resin through the design of the structure of each layer and the production steps to increase the crystal permeability and soft feeling of the product, and on the surface of the dry layer texture Injecting additives and then laminating the transparent polyurethane elastomer to expel the air bubbles out of the surface of the PU leather, reducing the abnormality of the original air bubbles and improving the permeability and efficiency. It has the advantages of good permeability, little bubble generation, good hand feeling, high production efficiency and low cost.

The above are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still It belongs to the scope of the technical solution of the present invention.

Claims (6)

1. The utility model provides a two system layer crystal mirror surface leathers of PU which characterized in that: comprises a base cloth, a wet PU layer, a dry PU grain layer, a printing layer, an adhesion layer and a transparent polyurethane elastomer which are sequentially and compositely arranged from bottom to top.

2. The method for bonding the PU double-layer crystal mirror leather according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:

the method comprises the following steps: coating a wet PU layer on the base cloth;

step two: coating the dry-method PU texture layer on the wet-method PU layer;

step three: overprinting a printing layer on the dry-method PU grain layer to obtain a first-stage semi-finished product;

step four: coating transparent polyurethane elastomer slurry on the mirror release paper, drying to form a transparent polyurethane elastomer, coating polyurethane slurry on the transparent polyurethane elastomer, and drying to be semi-dry to be used as an adhesive layer to obtain a second-stage semi-finished product;

step five: injecting an auxiliary agent on the printing layer of the first-stage semi-finished product and then attaching the adhesive layer of the second-stage semi-finished product;

step six: and extruding the bubbles out of the outer surface of the first-stage semi-finished product and the second-stage semi-finished product after compounding, and sequentially laminating, drying and cooling to prepare the PU double-layer crystal mirror surface leather.

3. The method for bonding PU double-layer crystal mirror leather according to claim 2, wherein: in the first step: firstly, pre-wetting a base cloth, and after pre-wetting, squeezing and ironing to keep the moisture content of the base cloth at 80% -95%; and then, coating the wet PU slurry on the soaked base fabric, and sequentially performing solidification, washing and drying to prepare the wet PU base material.

4. The method for bonding PU double-layer crystal mirror leather according to claim 3, wherein: and pre-wetting the base cloth by using a pre-wetting liquid.

5. The method for bonding PU double-layer crystal mirror leather according to claim 4, wherein: the pre-wetting solution is 10-25% of DMF aqueous solution.

6. The method for bonding PU double-layer crystal mirror leather according to claim 1, wherein: the printing layer is a double-color printing layer.

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