CN205804016U - A PU crystal mirror bonding structure - Google Patents

Abstract

The utility model belongs to the field of leather technology, and more specifically, the utility model relates to a PU crystal mirror bonding structure, which includes, from bottom to top, a base fabric layer, a wet PU layer, a dry PU texture layer, a printing layer, a transparent PU adhesive layer and a transparent polyurethane elastomer layer in sequence, wherein the base fabric layer is provided with a plurality of breathable micropores, and the thickness of the transparent polyurethane elastomer layer is 0.001mm-0.30mm. Compared with the prior art, the utility model adopts a transparent polyurethane elastomer layer as the surface layer, which has a soft and natural luster, a strong crystal feel, a soft hand feel, excellent bonding performance with the printing layer, good wear resistance, flex resistance, anti-aging, and anti-fungal properties, and also has the advantages of good cold resistance, breathability, washability, convenient processing, and low price.

Description

A PU crystal mirror bonding structure

technical field

The utility model belongs to the technical field of leather, more specifically, the utility model relates to a PU crystal mirror bonding structure.

Background technique

PU synthetic leather, also known as polyurethane synthetic leather, is generally composed of a base fabric and a polyurethane coating layer. It has been widely used in luggage, clothing, shoes, vehicles and furniture. The wide range of applications, large quantities, and many varieties are traditional. The natural leather can not be satisfied.

However, the existing PU crystal mirror products cannot be widely produced and used, mainly because of the polyurethane itself, which tends to produce bubbles and blank spots during production, resulting in poor transparency, low yield, high cost, and the texture that customers can choose Less, it is generally only suitable for fine and shallow lines, and slightly deeper lines are prone to speeding and abnormalities.

In view of this, it is indeed necessary to provide a PU crystal mirror bonding structure, which can increase the crystal sense, transparency and softness of the product by setting the dry-process PU texture layer and polyurethane elastomer, and can increase the yield , which can be applied to different kinds of textures.

Utility model content

The purpose of the utility model is to provide a PU crystal mirror bonding structure for the deficiencies of the prior art, which can increase the crystal sense, transparency and comfort of the product by setting a dry-process PU texture layer and polyurethane elastomer. It has a soft feeling, and can increase the yield and enrich the types of textures.

In order to achieve the above object, the utility model adopts the following technical solutions:

A PU crystal mirror bonding structure, from bottom to top, the PU crystal mirror bonding structure sequentially includes a base fabric layer, a wet PU layer, a dry PU texture layer, a printing layer, a transparent PU adhesive layer and a transparent polyurethane elastic The body layer, the base fabric layer is provided with several air-permeable micropores, and the thickness of the transparent polyurethane elastomer layer is 0.001mm-0.30mm.

As an improvement of the bonding structure of the PU crystal mirror surface of the utility model, the diameter of the air-permeable micropores is 100nm-50μm.

As an improvement of the PU crystal mirror bonding structure of the utility model, the thickness of the base cloth layer is 0.05mm-0.5mm, the thickness of the wet-process PU layer is 0.03mm-0.3mm, and the dry-process PU texture The thickness of the layer is 0.03mm-0.3mm, the thickness of the printing layer is 0.01mm-0.2mm, and the thickness of the transparent PU adhesive layer is 0.01mm-0.2mm.

As an improvement of the PU crystal mirror bonding structure of the utility model, the thickness of the base cloth layer is 0.1mm-0.3mm, the thickness of the wet-process PU layer is 0.08mm-0.2mm, and the dry-process PU texture The thickness of the layer is 0.08mm-0.2mm, the thickness of the printing layer is 0.05mm-0.15mm, the thickness of the transparent PU adhesive layer is 0.05mm-0.15mm, and the thickness of the transparent polyurethane elastomer layer is 0.01mm -0.20mm.

As an improvement of the PU crystal mirror bonding structure of the utility model, the thickness of the base cloth layer is 0.2mm, the thickness of the wet PU layer is 0.14mm, and the thickness of the dry PU texture layer is 0.14mm , The thickness of the printing layer is 0.10mm, the thickness of the transparent PU adhesive layer is 0.10mm, and the thickness of the transparent polyurethane elastomer layer is 0.12mm.

As an improvement of the bonding structure of the PU crystal mirror surface of the utility model, the diameter of the air-permeable micropores is 1 μm-30 μm.

As an improvement of the PU crystal mirror bonding structure of the utility model, the aperture of the air-permeable micropores is 5 μm-15 μm.

Compared with the prior art, the utility model has at least the following advantages:

First, the utility model uses a transparent polyurethane elastomer layer as the surface layer, which has soft and natural luster, strong crystal feeling, soft hand feeling, excellent adhesion to the printing layer, wear resistance, flex resistance, aging resistance, and mold resistance At the same time, it also has the advantages of good cold resistance, breathability, washability, convenient processing, and low price;

Second, the transparent PU adhesive layer in the utility model contains -NCO-(isocyanate group) and -NHCOO-(carbamate group) with strong polarity and chemical activity, and the group containing active hydrogen Materials, even materials with smooth surfaces, have excellent chemical adhesion; and it has excellent shear strength and impact resistance, and has excellent flexibility; it can also adapt to the bonding of substrates with different thermal expansion coefficients , which not only has strong adhesive force, but also has excellent cushioning and shock absorption functions;

Third, when making the utility model, inject additives on the surface above the dry-process PU texture layer and then paste the transparent polyurethane elastomer layer, apply chemical and physical principles to expel the air bubbles from the surface of the PU leather, which can reduce the residual air bubbles , improve transparency and yield, and reduce costs.

Fourth, the utility model can be adjusted and set according to customer needs to meet the different needs of different customers and provide customers with more options, and the utility model can be applied to different types of textures, thereby providing consumers with more The choice of grain patterns increases market competitiveness and meets customer needs.

Fifthly, the base fabric layer of the present invention has air permeability, thereby improving the comfort of use of the structure.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a semi-finished product of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram during the manufacturing process of the utility model.

Fig. 3 is a schematic cross-sectional structure diagram of the finished product of the present invention.

detailed description

As shown in Figure 1 to Figure 3, a PU crystal mirror surface bonding structure provided by the utility model, from bottom to top, the PU crystal mirror surface bonding structure successively includes base cloth layer 1, wet process PU layer 2, dry process PU layer Texture layer 3, printing layer 4, transparent PU adhesive layer 5 and transparent polyurethane elastomer layer 6, the base fabric layer 1 is provided with several air-permeable micropores 7, and the thickness of the transparent polyurethane elastomer layer 6 is 0.001mm-0.30mm. Wherein, the base fabric layer 1 is made of bass, and the wet-process PU layer 2 is more environmentally friendly, and the produced synthetic leather has good moisture permeability and air permeability.

Wherein, the pore diameter of the air-permeable micropore 7 is 100 nm-50 μm, preferably, the pore diameter of the air-permeable micro-pore 7 is 1 μm-30 μm. More preferably, the diameter of the air-permeable micropores is 5 μm-15 μm. The air-permeable micropores 7 are evenly distributed and basically the same in size.

The thickness of base fabric layer 1 is 0.05mm-0.5mm, the thickness of wet-process PU layer 2 is 0.03mm-0.3mm, the thickness of dry-process PU texture layer 3 is 0.03mm-0.3mm, and the thickness of printing layer 4 is 0.01mm -0.2mm, the thickness of the transparent PU adhesive layer 5 is 0.01mm-0.2mm.

Preferably, the thickness of the base fabric layer 1 is 0.1mm-0.3mm, the thickness of the wet-process PU layer 2 is 0.08mm-0.2mm, the thickness of the dry-process PU texture layer 3 is 0.08mm-0.2mm, and the thickness of the printing layer 4 is 0.05mm-0.15mm, the thickness of the transparent PU adhesive layer 5 is 0.05mm-0.15mm, and the thickness of the transparent polyurethane elastomer layer 6 is 0.01mm-0.20mm.

More preferably, the thickness of the base fabric layer 1 is 0.2mm, the thickness of the wet PU layer 2 is 0.14mm, the thickness of the dry PU texture layer 3 is 0.14mm, the thickness of the printing layer 4 is 0.10mm, and the transparent PU adhesive layer The thickness of 5 is 0.10mm, and the thickness of transparent polyurethane elastomer layer 6 is 0.12mm.

The preparation method of the present utility model comprises the following steps:

First, the making of semi-finished products: as shown in Figure 1, the semi-finished product of the present utility model comprises base cloth layer 1, and the top of base cloth layer 1 is coated with wet process PU layer 2, and the top of wet process PU layer 2 is provided with dry process The PU texture layer 3 is provided with a printing layer 4 above the dry process PU texture layer 3 . The preparation method is as follows: first pre-wet the base cloth layer 1, the pre-wet liquid is 10%-25% DMF aqueous solution, after pre-wetting, squeeze dry and iron to keep the moisture content of the base cloth layer 1 at 80%-95% , and then coat the PU wet-process slurry on the pre-wet base cloth layer 1, and then pass through coagulation-washing-drying processes to obtain the PU wet-process substrate. Among them, the DMF in the PU wet slurry formula will replace the water in the coagulation tank during the solidification process (water and DMF will dissolve each other) to produce neatly arranged fine cells as shown in Figure 1, where the coagulation tank It is necessary to maintain a certain ratio of concentration, otherwise it is easy to produce cells of different sizes or too large or too small, which will affect the ventilation effect. The compounding of the base cloth layer 1 and the wet-process PU layer 2 can also improve its tensile strength, shear strength and tear resistance.

Then coat the dry process PU texture layer 3 on the top of the wet process PU layer 2, and then overprint the two-color printing layer 4 on the top of the dry process PU texture layer 3 to complete the production of the semi-finished product of the present invention.

The second, the making of finished product: as shown in Figure 2, dry after coating the transparent polyurethane elastomer slurry on the mirror surface release paper, then coat the transparent polyurethane adhesive on the transparent polyurethane elastomer layer 6 and bake half Dry as the transparent PU adhesive layer 5, before attaching the semi-finished product to the transparent PU adhesive layer 5, inject auxiliary agents into the printing layer 4 on the surface of the dry-process PU texture layer 3, and then attach the printing layer 4 to the transparent PU adhesive layer 5 , applying chemical and physical principles to expel the air bubbles out of the surface of PU leather, that is, the finished product is obtained, as shown in Figure 3.

In a word, the utility model has the following advantages at least:

First, the utility model adopts the transparent polyurethane elastomer layer 6 as the surface layer, which has soft and natural luster, strong crystal sense, soft hand feeling, excellent bonding performance with the printing layer, wear resistance, flex resistance, aging resistance and mold resistance Good durability, but also has the advantages of good cold resistance, breathable, washable, convenient processing, and low price;

Second, the transparent PU adhesive layer 5 in the utility model contains -NCO-(isocyanate group) and -NHCOO-(carbamate group) of very strong polarity and chemical activity, and contains active hydrogen Substrates, even materials with smooth surfaces, have excellent chemical adhesion; and it has excellent shear strength and impact resistance, and has excellent flexibility; it can also adapt to the adhesion of substrates with different thermal expansion coefficients. It not only has strong adhesive force, but also has excellent cushioning and shock absorption functions;

Third, when making the utility model, inject additives on the surface above the dry-process PU texture layer 3 and then paste the transparent polyurethane elastomer layer 6, apply chemical and physical principles to push the air bubbles out of the PU leather surface, which can reduce air bubbles residues, improve permeability and yield, and reduce costs.

Fourth, the utility model can be adjusted and set according to customer needs to meet the different needs of different customers and provide customers with more options, and the utility model can be applied to different types of textures, thereby providing consumers with more The choice of grain patterns increases market competitiveness and meets customer needs.

Fifth, the base fabric layer 1 of the present invention has air permeability, thereby improving the comfort of use of the structure.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also make appropriate changes and modifications to the above embodiment. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (7)

1. A PU crystal mirror bonding structure, characterized in that: from bottom to top, the PU crystal mirror bonding structure successively includes a base cloth layer, a wet PU layer, a dry PU texture layer, a printing layer, and a transparent PU layer. Adhesive layer and transparent polyurethane elastomer layer, the base fabric layer is provided with several air-permeable micropores, and the thickness of the transparent polyurethane elastomer layer is 0.001mm-0.30mm. 2. The PU crystal mirror bonding structure according to claim 1, characterized in that: the diameter of the air-permeable micropores is 100nm-50μm. 3. The PU crystal mirror bonding structure according to claim 1, characterized in that: the thickness of the base cloth layer is 0.05mm-0.5mm, and the thickness of the wet-process PU layer is 0.03mm-0.3mm, so The thickness of the dry-process PU texture layer is 0.03mm-0.3mm, the thickness of the printing layer is 0.01mm-0.2mm, and the thickness of the transparent PU adhesive layer is 0.01mm-0.2mm. 4. The PU crystal mirror bonding structure according to claim 3, characterized in that: the thickness of the base cloth layer is 0.1mm-0.3mm, and the thickness of the wet-process PU layer is 0.08mm-0.2mm, so The thickness of the dry-process PU texture layer is 0.08mm-0.2mm, the thickness of the printing layer is 0.05mm-0.15mm, the thickness of the transparent PU adhesive layer is 0.05mm-0.15mm, and the transparent polyurethane elastomer layer The thickness is 0.01mm-0.20mm. 5. The PU crystal mirror bonding structure according to claim 4, characterized in that: the thickness of the base cloth layer is 0.2mm, the thickness of the wet-process PU layer is 0.14mm, and the dry-process PU texture layer The thickness of the printed layer is 0.14mm, the thickness of the printing layer is 0.10mm, the thickness of the transparent PU adhesive layer is 0.10mm, and the thickness of the transparent polyurethane elastomer layer is 0.12mm. 6. The PU crystal mirror bonding structure according to claim 2, characterized in that: the diameter of the air-permeable micropores is 1 μm-30 μm. 7. The PU crystal mirror bonding structure according to claim 6, characterized in that: the diameter of the air-permeable micropores is 5 μm-15 μm.