CN215856181U - Special low-shrinkage leather for high-grade automobile instrument panel - Google Patents

Abstract

The utility model discloses a low-shrinkage leather special for a high-grade automobile instrument panel, which comprises a leather blank layer made of cattle hide, wherein a heat foaming microcapsule layer is coated on the leather blank layer, a bonding layer is coated on the microcapsule layer, a middle coating color layer is sprayed on the bonding layer, patterns are pressed on the color layer, a semi-top layer is roll-coated on the embossing layer, and a top layer film with wear-resisting and sun-screening protection effects is sprayed on the semi-top layer. The cattle hide leather layer is obtained by tanning and retanning a raw cow hide, a novel liquid TARA tanning extract is creatively added during tanning and retanning, a thermal expansion microcapsule dispersion liquid is added at the later stage of retanning, and relatively loose parts, such as fiber gaps and ribs and hips, are filled, so that the internal framework of the leather is tighter, and the slight shrinkage rate after high temperature is ensured. The front surface of the cattle hide blank leather layer is particularly additionally coated with a thin microcapsule layer, so that natural damage and flaws on the surface of the leather are reduced.

Description

Special low-shrinkage leather for high-grade automobile instrument panel

Technical Field

The utility model relates to leather for an automobile, in particular to low-shrinkage leather special for an automobile instrument panel.

Background

1. The amount of genuine leather used by high-grade automobile instrument panels is increasing, but the accompanying problems are that the yellowing problem is shown after the instrument panel leather is subjected to sunshine insolation and climate cold-hot-wet alternate change, and the larger problem is that the size of genuine leather is changed obviously, namely shrunk, the surface shape of the instrument panel is changed or the edge is raised, so that the appearance is seriously influenced.

2. The adverse phenomenon seriously affects the normal matching use of the real leather product on the automobile instrument panel, and the problems of weather-proof shrinkage rate of the leather special for the automobile instrument panel and color stability of high-temperature strong light solarization are urgently needed to be solved.

3. Based on the situation, the patent provides a novel color-stable and size-stable leather special for the instrument panel from the viewpoint of innovating a technological process so as to improve the structure of a leather product, and solves the problem of the conventional leather for the automobile instrument panel.

Disclosure of Invention

The utility model aims to solve the technical defects and product defects and provides the special low-shrinkage leather for the automobile instrument panel, which has the advantages of small shrinkage rate, stable leather size, good yellowing resistance effect and good physical properties when subjected to high-temperature and low-temperature climate change and long-time high-temperature solarization.

The technical scheme of the utility model is as follows: the utility model provides a dedicated low shrinkage rate leather of high-grade motormeter dish, includes yellow cattle hide leather layer, the one deck thermal foaming microcapsule layer of coating on the crust leather layer, the coating has the layer of following on the microcapsule layer, it has well scribbling colour layer to spout on the layer of following, the decorative pattern forms the knurling layer on the colour layer, roller coat half topping layer on the knurling layer, the topping film of wear-resisting and sun-proof guard action of spraying utensil on the half topping layer.

Preferably, the first and second electrodes are formed of a metal,

the leather layer of the cattle hide is obtained by tanning and retanning the raw cattle hide, a novel liquid TARA tannin extract is creatively added to replace the traditional chrome powder or solid tannin extract during tanning and retanning, the permeability and the associativity are improved, the retanning filling effect and the filling uniformity are fully improved, and the thermal expansion microcapsule dispersion liquid is added at the later stage of retanning and further fully permeates into fiber gaps and loose structures of relative air loosens to be gathered. In the drying and heating process of the blank leather layer, the volume of the thermal expansion microcapsules is rapidly expanded after being heated, so that the relatively loose parts such as fiber gaps and the ribs and hips are fully filled, the internal structure of the leather is tighter, the blank leather layer of the cattle hide has better dimensional stability, namely micro shrinkage rate after undergoing long-time high-temperature or high-low-temperature and humidity changes (climate alternation), and the characteristic can be maintained in each subsequent process of manufacturing a finished product. The appearance size of the leather covered on the instrument panel is ensured to be particularly stable.

Preferably, the front side of the cattle hide leather layer is coated with a thin microcapsule layer, the microcapsule layer is coated on the front side of the hide leather by a mixed solution of thermal foaming microcapsule dispersion liquid and acrylic resin, after heating, drying and foaming, the hide leather is ground to remove redundant coating, natural disability and flaws on the surface of the leather are ensured to be covered, and the utilization rate of finished leather is improved.

The microcapsule layer is added with a bonding layer, and the outside of the bonding layer is provided with a middle coating color layer. Preferably, the adhesive layer is formed by roll coating a mixture of an adhesive and a coating aid with a small amount of a crosslinking agent. The effect of the subsequent layer is to improve the bonding of the color intermediate layer to the leather layer.

Preferably, the color intermediate layer is made of pigment paste with more stable color and stronger covering effect, and most of light is reflected when the leather is exposed to high temperature. Meanwhile, the pigment paste has stable color, is not easy to yellow and has strong covering property, so that the stability of the color of the surface of the genuine leather is ensured.

The embossing layer is the genuine leather coated with the color layer, the lines on the embossing roller are transferred to the surface of the genuine leather and are shaped at high temperature through a gap between the embossing roller and the felt at high temperature and high pressure, and the volume of the microcapsule substances in the genuine leather is expanded again under the action of high temperature, so that the patterns are fuller and clearer.

Preferably, the semi-top gloss layer is a mixed solution prepared from polyurethane resin, a hand feeling agent, pigment paste and a cross-linking agent, the roller coating is used for improving the physical properties of the product on the genuine leather embossing layer, and the semi-top gloss layer comprises a formula system with the characteristics of strong wear resistance, strong rubbing color fastness, aging resistance, stripping resistance and the like.

Preferably, the top film is a coating layer finally sprayed on the genuine leather, and the top film contains a brightening agent, a medium polyurethane resin, a waxy hand feeling agent, a delustering agent, a high-covering pigment paste, a high-solid content cross-linking agent and the like, so that the color, the luster and the touch are adjusted, the physical and chemical properties of the instrument panel leather and the color stability of strong light and high temperature solarization resistance are further improved, and the obvious quality reduction caused by solarization and aging is avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention

In the figure 1, a low shrinkage cattle hide leather layer; 2. a microcapsule layer; 3. a bonding layer; 4. a color intermediate layer; 5. embossing layer; 6. a semi-topcoat layer; 7. top coat

Detailed Description

The utility model will be further described with reference to the accompanying drawings, without limiting the scope of the utility model.

As shown in fig. 1, the low-shrinkage leather specially used for high-grade automobile instrument panels comprises a low-shrinkage leather blank layer 1 made of cattle hide, wherein a thermal foaming microcapsule layer 2 is coated on the leather blank layer 1, a bonding layer 3 is coated on the microcapsule layer 2, a middle coating color layer 4 is sprayed on the bonding layer 3, a semi-top light layer 6 is roll-coated on the color layer 4, and a top film 7 is sprayed on the semi-top light layer 6. An embossing layer 5 is arranged between the middle coating color layer 4 and the half top light layer 6, the embossing is further fixed through the half top light layer 6, and the following layer 3 is specially added for improving the combination fastness of the middle coating color layer 4, the cattle hide blank leather layer 1 and the microcapsule layer 2.

The utility model creatively adds the novel liquid TARA tannin extract to replace the traditional chrome powder or solid tannin extract in the tanning and retanning processes of the crust leather layer, improves the permeability and the tanning combination, and fully improves the retanning filling effect and the filling uniformity. X-LITE thermal expansion microcapsule dispersing agent is added at the later stage of retanning, and the mixture is further fully permeated into fiber gaps and loose structures of the relative air-loosens through the mechanical rotation of the rotary drum for aggregation. In the drying and heating process of the blank leather layer, the volume of the microcapsule substance is rapidly expanded after being heated, which is increased by about 30-40 times, so that the relatively loose parts, such as fiber gaps and the ribs and the hips, are fully filled, the framework in the leather is tighter, and the cattle hide blank leather layer is ensured to have better dimensional stability after being subjected to long-time high-temperature or high-low-temperature and humidity changes (climate alternation), namely the shrinkage rate is less than 3%, and the characteristic can be maintained in each subsequent process of preparing a finished product. The leather is ensured to be particularly stable in size after being coated on the instrument panel, and no obvious shrinkage phenomenon is generated.

Preferably, the front side of the cattle hide leather layer is coated with a thin microcapsule layer, the microcapsule layer is composed of a mixed solution of a thermal foaming microcapsule dispersion liquid X-LITE and acrylic resin, the microcapsule layer is coated on the front side of the hide leather, after heating, drying and foaming, redundant coating materials are removed through buffing, natural flaws on the surface of the leather are guaranteed to be covered, and the utilization rate of finished leather can be obviously improved.

The microcapsule layer is added with a bonding layer, and the outside of the bonding layer is provided with a middle coating color layer. Preferably, the adhesive layer is formed by roll coating a mixture of an adhesive UH and a base material 5500 with a small amount of a crosslinking agent. And the bonding fastness of the middle coating color layer and the crust leather is improved.

Preferably, the intermediate color layer is made of STHAL3900 series pigment paste with more stable color and stronger covering effect, most light of the genuine leather is reflected when the genuine leather is exposed to high temperature, so that the temperature of the surface of the genuine leather rises slowly, and the temperature of the surface of the genuine leather is reduced by about 10 ℃ under the same exposure condition compared with other conventional processes. Meanwhile, the 3900 series pigment paste is stable in color and not easy to yellow, and the strong covering property of the paste protects the leather layer from being affected by strong light, so that the stability of the color of the surface of the leather is ensured.

The embossing layer is the genuine leather coated with the color layer, the lines on the embossing roller are transferred to the surface of the genuine leather and are shaped at high temperature through a gap between the embossing roller and the felt at high temperature and high pressure, and the volume of the microcapsule substances in the genuine leather is expanded again under the action of high temperature, so that the patterns are fuller and clearer.

The semi-top gloss layer is prepared by mixing hard polyurethane resin, medium-hard polyurethane resin, a hand feeling agent, a pigment paste and a cross-linking agent, is coated on a genuine leather embossing layer by a roller coater, and improves the physical properties of a product.

Preferably, the top film is a coating layer finally sprayed on the genuine leather, and the top film contains a brightening agent, a medium polyurethane resin, a wax agent handfeel agent, a delustering agent, 3900 series pigment paste, a high solid content cross-linking agent and the like, so that the color, the luster and the touch feeling are adjusted, the physical and chemical properties of the instrument panel leather and the color stability of strong light and high temperature exposure resistance are further improved, and the color instability, the yellowing and the reduction of other physical properties after aging caused by solarization are avoided.

Claims (2)

1. The utility model provides a dedicated low shrinkage rate leather of high-grade motormeter dish, includes yellow cattle hide leather layer, its characterized in that: the coating comprises a crust leather layer, a base leather layer, a coating adhesive layer, a middle coating color layer, an embossing layer, a semi-top finish layer and a top finish layer film, wherein the base leather layer is coated with a thermal foaming microcapsule layer, the coating adhesive layer is coated on the microcapsule layer, the middle coating color layer is sprayed on the adhesive layer, patterns are pressed on the color layer to form the embossing layer, the semi-top finish layer is coated on the embossing layer in a roller coating mode, and the semi-top finish layer is coated with the top finish layer film with wear-resisting and sun-proof protection effects.

2. The low-shrinkage leather special for the high-grade automobile instrument panel according to claim 1, wherein the low-shrinkage leather is characterized in that: the buffalo combined tanned crust leather layer contains a novel liquid TARA tanning extract and a thermal expansion microcapsule dispersion liquid filling substance, and has a compact structure and a small shrinkage rate.

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