阅读说明：本技术 一种高仿真全水性汽车内饰专用超纤革的直涂工艺 (Direct coating process of high-simulation full-aqueous microfiber leather special for automotive interiors ) 是由 庄君新 张昀 宋兵 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种高仿真全水性汽车内饰专用超纤革的直涂工艺,包括下列步骤：S1、补伤；S2、磨革；S3、封底,将超纤革贝斯表面涂布1层封底材料；S4、烫平：将封底后的超纤革贝斯表面进行烫光；S5、辊底涂：配制发泡底涂浆料,均匀的涂布在烫平后的超纤革贝斯表面；S6、压花；S7、滚涂：配制滚涂浆料,烘箱温度控制在120-160℃的条件下,进行滚涂作业,收卷；S8、喷浆：配制喷浆浆料,进行喷涂作业。本发明的高仿真全水性汽车内饰专用超纤革的直涂工艺使用环保的水性超纤基材,采用真皮的涂饰造面工艺,达到更高的仿真性。(The invention discloses a direct coating process of high-simulation full-aqueous microfiber leather special for automotive interiors, which comprises the following steps: s1, repairing the injury; s2, buffing; s3, back sealing, namely coating 1 layer of back sealing material on the surface of the microfiber leather base; s4, ironing: the surface of the covered microfiber leather bass is polished; s5, roller bottom coating: preparing foaming primary coating slurry, and uniformly coating the foaming primary coating slurry on the surface of the ironed microfiber leather bass; s6, embossing; s7, roll coating: preparing roll coating slurry, controlling the temperature of an oven at 160 ℃ of 120-; s8, guniting: preparing the guniting slurry and carrying out the spraying operation. The direct coating process of the high-simulation full-aqueous microfiber leather special for automotive interiors uses the environment-friendly aqueous microfiber base material and adopts a genuine leather finishing and surfacing process to achieve higher simulation.)

1. A direct coating process of special high-simulation full-aqueous microfiber leather for automotive interiors is characterized by comprising the following steps:

s1, repairing the wound:

uniformly coating the repairing paste on the surface of the microfiber leather base, wherein the coating amount is controlled to be 20-200g/m2, the conveying speed is controlled to be 5-20m/min, and the gap is controlled to be 0.4-1.5 mm; then drying in a drying tunnel, wherein the temperature in the drying tunnel is controlled between 50 and 150 ℃;

s2, buffing:

grinding the repaired microfiber leather bass by a leather grinding machine to remove the surface repairing paste;

s3, bottom sealing:

after buffing, coating 1 layer of back cover material on the surface of the microfiber leather bass, controlling the coating amount to be 10-80g/m2, then drying the microfiber leather by a drying tunnel, controlling the temperature of the drying tunnel to be 50-150 ℃, and controlling the conveying speed to be 5-20 m/min;

s4, ironing:

under the conditions that the temperature is 50-150 ℃ and the pressure is 50-150KG, the surface of the covered microfiber leather bass is scalded;

s5, roller bottom coating:

preparing foaming base coating slurry, adjusting the consistency to be in a #4 Ford cup, and uniformly coating the foaming base coating slurry on the surface of the ironed microfiber leather bass for 30-100 seconds; then drying and winding the product in an oven with the temperature of 100-180 ℃;

s6, embossing:

embossing the surface of the microfiber leather bass subjected to roller bottom coating by a roller embossing machine at the set temperature of 80-180 ℃, under the pressure control of 100-300KG and the conveying speed of 2-5m/min, and performing an embossing process;

s7, roll coating:

preparing roll coating slurry, adjusting the consistency to be in a #4 Ford cup, performing roll coating operation for 30-100 seconds, controlling the temperature of an oven to be 90-200 ℃, and rolling;

s8, guniting:

preparing the guniting slurry, and carrying out spraying operation, wherein the conveying speed is controlled to be 5-20m/min in the spraying process, and the drying temperature is controlled to be 80-180 ℃.

2. The direct coating process of the highly-simulated full-water-based microfiber leather for automobile interiors according to claim 1, wherein in step S1, the mending paste is uniformly coated on the surface of microfiber leather bass by means of roller coating or blade coating, the coating amount is controlled to be 60-170g/m2, the conveying speed is controlled to be 7-17m/min, and the gap is controlled to be 0.6-1.2 mm; then drying in a drying tunnel, wherein the temperature in the drying tunnel is controlled between 80 and 120 ℃.

3. The direct coating process of the highly-simulated all-water-based microfiber leather for automobile interiors as claimed in claim 1, wherein in step S2, the sand paper used for buffing is controlled between 180 and 1000#, and the conveying speed is controlled to be 5-15 m/min.

4. The direct coating process of the highly-simulated full-water microfiber leather specially for automobile interiors according to claim 1, wherein in step S3, after buffing, 1 layer of bottom sealing material is coated on the surface of the microfiber leather by spraying or roller coating, the coating amount is controlled to be 30-60g/m2, and then the microfiber leather is dried by a drying tunnel, the temperature of the drying tunnel is controlled to be 80-120 ℃, and the conveying speed is controlled to be 8-17 m/min.

5. The direct coating process of the highly-simulated all-aqueous microfiber leather specially for automotive interiors according to claim 1, wherein in step S4, the surface of the bottomed microfiber leather is scalded at a temperature of 80-120 ℃ and a pressure of 75-125 KG.

6. The direct coating process of the highly-simulated full-water microfiber leather for automobile interiors according to claim 1, wherein in step S5, a foaming primer slurry is prepared, and is uniformly coated on the surface of the ironed microfiber leather base under the conditions of a #4 ford cup and 50-80 seconds in consistency; then drying and rolling in an oven with the temperature of 115-165 ℃.

7. The direct coating process of the highly-simulated all-water-based microfiber leather for automobile interiors as claimed in claim 1, wherein in step S6, the bass surface of the microfiber leather after roller bottom coating is embossed by a roller embossing machine at a temperature of 120-.

8. The direct coating process of the highly-simulated all-water-based microfiber leather for automobile interiors as claimed in claim 1, wherein in step S7, the roller coating slurry is prepared, the consistency is adjusted to #4 ford cup for 55-80 seconds, and the oven temperature is controlled to 120-.

9. The direct coating process of the highly-simulated all-water microfiber leather for automobile interiors as claimed in claim 1, wherein in step S8, the spraying slurry is prepared and the spraying operation is performed, wherein the conveying speed is controlled to be 10-15m/min and the drying temperature is controlled to be 125-135 ℃.

Technical Field

The invention relates to the technical field of leather, in particular to a direct coating process of high-simulation full-water-based microfiber leather special for automotive interiors.

Background

The traditional microfiber leather process flow generally adopts a centrifugal paper transfer method, namely, firstly coating chemical materials for coating on textured centrifugal paper in a roller coating or blade coating mode, namely a surface layer, a middle layer and a bonding layer, bonding the microfiber and the chemical materials in a bonding mode under certain pressure, drying at high temperature, finally peeling off the centrifugal paper, and rolling to obtain a finished product.

Disclosure of Invention

The invention aims to solve the problems of waste and pollution of the traditional process and aims to provide a direct coating process of high-simulation full-water-based microfiber leather special for automotive interiors. The direct coating process of the high-simulation full-aqueous microfiber leather special for automotive interiors uses the environment-friendly aqueous microfiber base material and adopts a genuine leather finishing and surfacing process to achieve higher simulation.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a direct coating process of special high-simulation full-aqueous microfiber leather for automotive interiors comprises the following steps:

s1, repairing the wound:

uniformly coating the repairing paste on the surface of the microfiber leather base, wherein the coating amount is controlled to be 20-200g/m2, the conveying speed is controlled to be 5-20m/min, and the gap is controlled to be 0.4-1.5 mm; then drying in a drying tunnel, wherein the temperature in the drying tunnel is controlled between 50 and 150 ℃;

s2, buffing:

grinding the repaired microfiber leather bass by a leather grinding machine to remove the surface repairing paste;

s3, bottom sealing:

after buffing, coating 1 layer of back cover material on the surface of the microfiber leather bass, controlling the coating amount to be 10-80g/m2, then drying the microfiber leather by a drying tunnel, controlling the temperature of the drying tunnel to be 50-150 ℃, and controlling the conveying speed to be 5-20 m/min;

s4, ironing:

under the conditions that the temperature is 50-150 ℃ and the pressure is 50-150KG, the surface of the covered microfiber leather bass is scalded;

after ironing, subsequent direct coating is facilitated;

s5, roller bottom coating:

preparing foaming base coating slurry, adjusting the consistency to be in a #4 Ford cup, and uniformly coating the foaming base coating slurry on the surface of the ironed microfiber leather bass for 30-100 seconds; then drying and winding the product in an oven with the temperature of 100-180 ℃;

the foaming base coat slurry can be prepared by adjusting the formula of polyurethane resin and foaming resin with light resistance, folding resistance, hydrolysis resistance and aging resistance according to the color and detection standard of a client, and the foaming multiplying power is adjusted according to the requirement and controlled to be 1-3 times.

S6, embossing:

embossing the surface of the microfiber leather bass subjected to roller bottom coating by a roller embossing machine at the set temperature of 80-180 ℃, under the pressure control of 100-300KG and the conveying speed of 2-5m/min, and performing an embossing process;

the patterns pressed by the embossing process can be carried out according to the lines required by customers, and the type of the patterns can be determined by a person skilled in the art according to the needs.

S7, roll coating:

preparing roll coating slurry, adjusting the consistency to be in a #4 Ford cup, performing roll coating operation for 30-100 seconds, controlling the temperature of an oven to be 90-200 ℃, and rolling;

the roll coating slurry can use the polyurethane resin with light resistance, wear resistance, color fastness and water permeability according to the color and the appearance of a sample plate and the corresponding standard requirements, and the type (formula) and the dosage of the roll coating slurry can be determined by the skilled person according to the needs.

S8, guniting:

preparing the guniting slurry, and carrying out spraying operation, wherein the conveying speed is controlled to be 5-20m/min in the spraying process, and the drying temperature is controlled to be 80-180 ℃.

The spraying slurry can be polyurethane resin with full water-based, wear-resistant, light-resistant, friction-resistant color fastness and stain-resistant performance according to the color, touch, gloss and detection standard required by a customer sample plate, and the type (formula) and dosage of the spraying slurry can be determined by a person skilled in the art according to the requirement.

The direct coating process of the high-simulation full-aqueous microfiber leather special for automotive interiors uses the environment-friendly aqueous microfiber base material and adopts a genuine leather finishing and surfacing process to achieve higher simulation.

1. The centrifugal paper is saved, and the direct coating process of the high-simulation full-water-based microfiber leather special for automotive interiors directly coats the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper is not used;

2. the consumption of chemical materials is reduced, the direct coating process of the special microfiber leather for high-simulation full-water automotive interior disclosed by the invention is a full-water direct coating process, the chemical materials are directly coated in a roller coating or spraying manner, and the effect of uniform coating can be achieved only by 13-20G/SF;

3. the direct coating process of the high-simulation full-water microfiber leather special for automotive interiors is full-water, pollution-free, volatile harmful gas-free and low in VOC.

Preferably, in step S1, the repair paste is uniformly coated on the surface of the microfiber leather base by means of roll coating or blade coating, the coating amount is controlled to be 60-170g/m2, the conveying speed is controlled to be 7-17m/min, and the gap is controlled to be 0.6-1.2 mm; then drying in a drying tunnel, wherein the temperature in the drying tunnel is controlled between 80 and 120 ℃.

Preferably, in step S2, the sand paper used for leather grinding is controlled between 180-.

Preferably, in step S3, after buffing, 1 layer of back cover material is coated on the surface of microfiber leather bass by spraying or roller coating, the coating amount is controlled to be 30-60g/m2, and then the microfiber leather is dried by a drying tunnel, the temperature of the drying tunnel is controlled to be 80-120 ℃, and the conveying speed is controlled to be 8-17 m/min.

Preferably, in step S4, the surface of the bottomed microfiber leather bass is scalded at a temperature of 80 to 120 ℃ and a pressure of 75 to 125 KG.

Preferably, in step S5, preparing a foaming primer slurry, adjusting the consistency to #4 fott cup, and uniformly coating the foaming primer slurry on the surface of the ironed microfiber leather bass in the condition of 50 to 80 seconds; then drying and rolling in an oven with the temperature of 115-165 ℃.

Preferably, in step S6, the microfiber leather bass surface after roller bottom coating is embossed by a roller embossing machine at a temperature of 120-.

Preferably, in step S7, preparing roll coating slurry, adjusting the consistency to #4 Ford cup, 55-80 seconds, controlling the oven temperature at 120-.

Preferably, in step S8, a spraying slurry is prepared and spraying is performed, wherein the conveying speed is controlled to be 10-15m/min and the drying temperature is controlled to be 125-135 ℃.

Preferably, in step S3, the back cover material is a water-resistant, solvent-resistant, good-adhesion, alkali-acid-resistant, aqueous polyurethane negative-ion, cationic polymer with a jungle resistance test (90 ℃, 95 humidity) of 168 × 5 hours or more.

Preferably, in the step S5, the foaming primer paste is a fully aqueous polyurethane or acrylic compound that is resistant to high temperature, light aging, hydrolysis, folding, high in adhesion, and has a certain extensibility.

Preferably, in the step S7, in the roll coating slurry formula, the used chemical material is a polyurethane or acrylic chemical material with yellowing resistance, high temperature light aging resistance, high wear resistance and color fastness resistance.

Preferably, in the step S8, the chemical material used in the formula of the guniting paste is a polyurethane or acrylic acid chemical material with yellowing resistance, high temperature light aging resistance, hydrolysis resistance, solvent resistance, high wear resistance, color fastness resistance, and stain resistance.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the direct coating process of the high-simulation full-aqueous microfiber leather special for automotive interiors uses the environment-friendly aqueous microfiber base material and adopts a genuine leather finishing and surfacing process to achieve higher simulation.

1. The centrifugal paper is saved, and the direct coating process of the high-simulation full-water-based microfiber leather special for automotive interiors directly coats the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper is not used;

2. the consumption of chemical materials is reduced, the direct coating process of the special microfiber leather for high-simulation full-water automotive interior disclosed by the invention is a full-water direct coating process, the chemical materials are directly coated in a roller coating or spraying manner, and the effect of uniform coating can be achieved only by 13-20G/SF;

3. the direct coating process of the high-simulation full-water microfiber leather special for automotive interiors is full-water, pollution-free, volatile harmful gas-free and low in VOC.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.

The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.