WO2021136229A1

WO2021136229A1 - Novel light-transmitting and superconducting automotive interior material and preparation method therefor

Info

Publication number: WO2021136229A1
Application number: PCT/CN2020/140606
Authority: WO
Inventors: 郭嘉; 李超; 裴莹; 高金岗
Original assignee: 苏州瑞高新材料有限公司
Priority date: 2019-12-31
Filing date: 2020-12-29
Publication date: 2021-07-08
Also published as: CN113121858A; CN113121858B

Abstract

The present invention relates to a novel light-transmitting and superconducting automotive interior material and a preparation method therefor. The automotive interior material sequentially comprises a surface treatment layer, a TPO film, and a back treatment layer. The formula of raw materials of the TPO film comprises, in parts by weight, 92-98 parts of modified TPO particles, 1-4 parts of an adjuvant, and 1-4 parts of a pigment. The pigment is a conducting pigment. The automotive interior material of the present invention adopts specific modified TPO particles, and in conjunction with a specific amount of a specific pigment, the prepared TPO film has light-transmitting and superconducting effects; two surfaces of the TPO film are respectively subjected to surface treatment and back treatment, and the prepared automotive interior material made of the TOP material can have light-transmitting and superconducting characteristics of simple touch screen operations, new application fields of TPO materials are added, and the conventional application concept of automotive interiors is innovated.

Description

A new type of light-transmitting superconducting automobile interior material and preparation method thereof

Technical field

The invention belongs to the technical field of automotive interior skins, and specifically relates to a new type of light-transmitting superconducting automotive interior materials and a preparation method thereof.

Background technique

In 1886, the world's first internal combustion engine-powered car was born. The interior parts were made of traditional injection or coated materials, with a single appearance, lacking vitality and sense of technology. In 2009, the concept of the interior began to be updated, with large LCD screens, interior atmosphere lights and starry sky ceilings. This idea was only applied in 2013.

However, there are still the following problems when using ordinary light-transmitting interiors for automotive interiors:

1) The large LCD screen is connected to the screen, and it is not beautiful when it is not connected to the power supply, which is based on the lack of technology and modernity based on tradition;

2) Other decorations such as interior atmosphere lights are mostly PVC materials, which are difficult to meet environmental protection requirements;

3) Traditional atmosphere color-changing decoration is mainly divided into two types, one is split decorative light strip or light bar, which not only has general environmental protection performance, but also affects the appearance of car interiors during the day, and the other is cloth ceiling or injection molding. Atmosphere decoration, these two types are slightly lacking in visual and tactile sense, and the atmosphere decoration and operation are separated, which cannot achieve coexistence of beauty and use.

Nowadays, more and more mid-to-low-end cars are favored by consumers, and interior materials are also very high-end. PVC materials are slowly being replaced by TPO, PU and other environmentally friendly materials. However, traditional TPO products are mostly used in instrument panels, decorative panels, and door panel decorations, and are mainly black, brown, and gray. Recently, other colors on the market have become active, although TPO products are both functional and environmentally friendly. Very superior, but still slightly single in appearance. Moreover, there is no car interior material with light-transmitting superconducting TPO material in the market, and most of the existing car interior materials with light-transmitting superconducting characteristics are still PVC materials.

Summary of the invention

The purpose of the present invention is to provide a novel light-transmitting superconducting automotive interior material and a preparation method thereof in order to overcome the shortcomings of the prior art.

In order to achieve the above objective, the technical solution adopted by the present invention is:

A light-transmitting superconducting automotive interior material. The automotive interior material includes a surface treatment layer, a TPO film layer and a back treatment layer arranged in sequence. The raw material formula of the TPO film layer includes 92-98 parts by weight. Parts of modified TPO particles, 1 to 4 parts of additives and 1 to 4 parts of pigments, the pigments being conductive pigments.

In the present invention, the light-transmitting superconducting effect is to obtain the special properties of light-transmitting superconducting through the mutual combination of special materials in the TPO film.

Further, the modified TPO particles are thermoplastic elastomer particles. Preferably, TPO particles such as Mitsui's model RG-30.

Further, the pigment is a pigment containing metal particles, and the particle size of the metal particles is 0.3 to 3 μm. Preferably, the particle size of the metal particles is 0.3-1 μm.

Further, the auxiliary agent is a light stabilizer, and preferably, the light stabilizer is a hindered amine light stabilizer.

Preferably, the raw material formula of the TPO film layer includes 92-98 parts of modified TPO particles, 1-4 parts of additives and 1-4 parts of pigments.

Preferably, the thickness of the TPO film layer is 0.5±0.05 mm.

Further, the material used for the surface treatment layer is polyurethane resin. Preferably, the material used for the surface treatment layer is a water-based or solvent-based polyurethane resin, which is coated on one side of the TPO film layer by a printing process and dried to form the surface treatment layer. After a certain number of cleanings or improper cleaning, the surface treatment layer on the TPO film layer falls off, leaking the TPO film layer that is not scratch resistant, causing scratches.

Further, the material used for the back surface treatment layer is polyurethane or polyolefin resin. Preferably, the material used for the back surface treatment layer is a water-based or solvent-based polyurethane resin, which is coated on the other side of the TPO film layer by a printing process and dried to form the back surface treatment layer. The back treatment layer is Improve the polarity of the TPO film layer, so that the automotive interior material and the coated pattern board are better bonded.

The further technical solution adopted by the present invention is: the preparation method of the above-mentioned light-transmitting superconducting automobile interior material, the preparation method includes the following steps:

(1) According to the formula, mix the modified TPO particles, additives and pigments uniformly, then melt and extrude and shape to obtain a TPO film;

(2) Coating polyurethane resin on one side of the TPO film layer prepared in step (1) and drying to form a surface treatment layer;

(3) After step (2), the other surface of the TPO film layer is coated with a polyurethane resin or a polyolefin resin, and dried to form a back surface treatment layer to prepare the automotive interior material.

Further, the preparation method further includes the step of embossing the surface treatment layer on the TPO film layer after the treatment in step (2) and before the treatment in step (3).

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

The automotive interior material of the present invention adopts specific modified TPO particles, combined with specific pigments, the prepared TPO film has the effects of light transmission and superconductivity, and then the two surfaces of the TPO film are respectively subjected to surface treatment and back treatment, The prepared TPO material for automotive interior materials has light-transmitting superconducting properties that can perform simple touch screen operations, increasing the application of TPO materials in new fields, and innovating the traditional application concept of automotive interiors.

The automotive interior materials of the present invention not only take into account the scratch resistance, light aging resistance, and softness of the TPO materials. The automotive interior materials of the present invention also have low cost, good flame retardancy, environmental protection, low VOC, and low odor. , Continuous production, recyclable, in line with the strategic requirements of the country's sustainable development.

The automotive interior material of the present invention has clear light transmission. If it is directly covered on the operation panel, simple touch, key or sliding operations can be performed. Compared with the injection products in the current market, the visual and tactile feeling are greatly improved. , It is more in line with the design requirements of human body function.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of the light-transmitting superconducting automotive interior material of Example 1;

In the figure: 1. Surface treatment layer; 2. TPO film layer; 3. Back surface treatment layer.

Detailed ways

As mentioned in the background art, most of the existing automotive interior materials with light-permeable and superconducting properties are made of PVC materials. Nowadays, more and more mid- and low-end cars are favored by consumers, and interior materials are also very popular. High-grade, PVC materials are slowly being replaced by TPO, PU and other environmentally friendly materials. In order to meet the interior needs of all consumer groups, new light-transmitting superconducting automotive interior materials are developed.

Based on the lightweight, safe and environmentally friendly design concept of new energy vehicles, the inventor integrated the manufacturing process of the TPO skin with high-perspective and superconducting technologies. The preparation of a new type of light-transmitting superconducting automotive interior materials for automotive interiors not only increases the application of TPO materials in new fields, but also innovates the traditional application concepts of automotive interiors, and also takes into account the scratch resistance and light aging resistance of TPO materials. Performance, soft feel, low cost, good flame retardant performance, environmental protection, low VOC, low odor, continuous production, recyclable, in line with the strategic requirements of national sustainable development.

The specific implementation of the present invention will be further described in detail below in conjunction with specific embodiments, but the implementation and protection scope of the present invention is not limited to this.

Example 1

As shown in FIG. 1, the light-transmitting superconducting automotive interior material provided by this embodiment includes a surface treatment layer 1, a TPO film layer 2 and a back treatment layer 3 arranged in sequence.

The material used for the surface treatment layer 1 is a water-based two-component polyurethane resin with a solid content of 25%.

The material used for the back surface treatment layer 3 is a water-based polyolefin resin with a solid content of 28%.

The raw material formula used in TPO film layer 2 is shown in Table 1, where:

The modified TPO particles are thermoplastic elastomers, model RG-30, purchased from Mitsui Company.

The auxiliary agent is a hindered amine light stabilizer.

The pigment is a pigment containing metal particles with a particle size of 0.3 to 1 μm, for example, the pigment purchased from Ximeishi, model 2686.

The automotive interior material is prepared by the following method:

(1) Weigh according to the raw material formula of the TPO film layer, weigh and mix, and then use an extruder to melt and extrude to form a TPO cast film, and keep the TPO film at 150～220℃, and then use double Rolled into a TPO film with a thickness of 0.5mm;

(2) Printing and coating water-based two-component polyurethane resin on the surface of the TPO film prepared in step (1), and then drying at 100-120°C to form a surface treatment layer;

(3) Print and coat the water-based polyolefin resin on the other side of the TPO film treated in step (2), and then dry it at 100-120°C to form a back surface treatment layer to produce a light-transmitting superconducting automotive interior material.

The automotive interior material in this example is a TPO single film, which does not have a composite material. Its texture and surface treatment are optional, so it has good decoration. On the other hand, the back of the TPO film is polyurethane, which is then bonded to On the polypropylene skeleton, the compatibility is good, and the car interior materials produce carbohydrates after burning, which is harmless to the environment and can be recycled and reused.

Example 2

For the light-transmitting superconducting automotive interior material provided in this embodiment, the raw material formula of the TPO film layer in the automotive interior material is shown in Table 1, and the others are the same as in Example 1.

Example 3

Example 4

Comparative example 1

The raw material formula of the TPO film layer in the automotive interior materials provided in this example is shown in Table 1, and the others are the same as in Example 1.

In this example, the TPO particles are conventional TPO particle materials, purchased from Mitsui, and the model is RG-50.

Comparative example 2

The raw material formula of the TPO film layer in the automotive interior materials provided in this example is shown in Table 1, and the others are the same as in Comparative Example 1.

Comparative example 3

Comparative example 4

Prior to the present invention, the inventor also tried the solution of ordinary colorants (with no conductivity), but the transparency and clarity were extremely poor, and they could not be manipulated, so they were not given as examples.

Evaluation method

Light transmittance: test method---spectrophotometer.

Sharpness: test method---image fidelity, the percentage of normal image retained on the surface of the image or graphics through the product.

Normal concealment: Test method---1, the whiteboard and blackboard are the backing, put the product under the two boards respectively, and observe the surface difference visually. 2. The white board and the blackboard are the backings. Place the product under the two boards separately, and use the color measuring instrument to test the color difference.

Touch screen operability: test method---touch control verification, evaluation method---subjective evaluation, classify 1-2-3, level 3 is smooth operation, level 2 operability but not smooth enough, level 1 It is inoperable or has only a weak response.

Table 1 shows the raw material formulations of the TPO film layers in Examples 1 to 4 and Comparative Examples 1 to 4 and the performance evaluation results of automotive interior materials

It can be seen from Table 1 that the TPO particles in the TPO film layer of automotive interior materials use traditional TPO particles RG-50 material with special color materials, which can achieve light transmission, but the light transmission effect is poor, the clarity is poor, and the normal coverage is poor. Selecting RG-30 can provide the product's light transmission effect. As in Comparative Example 1, the light transmission performance is poor and the clarity is poor, and the expected effect cannot be achieved even by reducing the thickness. Compared with comparative example 1, comparative example 2 can improve the light transmission effect by reducing the color, but the light transmission and clarity can not reach the expected effect. Comparative examples 3 and 4 have improved light transmission and clarity. It can also meet the requirements, but the normal coverage cannot meet the requirements (inspection method 1).

The automotive interior material of the present invention selects specific TPO particles and specific pigments for matching use, has good light transmission effect, good clarity, no surface difference is found when the light source is not turned on, has a conductive function, and can be operated on a touch screen, as in Example 1. ~4.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those familiar with the art to understand the content of the present invention and implement them accordingly, and should not limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

A light-transmitting superconducting automotive interior material, characterized in that: the automotive interior material includes a surface treatment layer, a TPO film layer, and a back treatment layer arranged in sequence. The raw material formula of the TPO film layer is calculated in parts by weight. Including 92～98 parts of modified TPO particles, 1-4 parts of additives and 1-4 parts of pigments,

Wherein, the pigment is a conductive pigment containing metal particles, and the particle size of the metal particles is 0.3-3 μm;

The auxiliary agent is a hindered amine light stabilizer

The thickness of the TPO film layer is 0.5±0.05 mm;

The material used for the surface treatment layer is a water-based polyurethane resin, and the water-based polyurethane resin is coated on one side of the TPO film layer and cured to form the surface treatment layer;

The material used for the back surface treatment layer is polyurethane or polyolefin resin.
The light-transmitting superconducting automotive interior material according to claim 1, wherein the raw material of the TPO film layer is composed of the following components: 94 parts of modified TPO particles, 3 parts of additives and 3 parts of pigments. The modified TPO particles are Mitsui's model RG-30 TPO particles, the particle size of the metal ions in the pigment is 0.3 to 1 μm, and the light-transmitting superconducting automotive interior material is prepared by a method including the following steps get:

(1) According to the formula, mix the modified TPO particles, additives and pigments uniformly, then melt and extrude and shape to obtain a TPO film;

(2) Coating polyurethane resin on one side of the TPO film layer prepared in step (1) and drying to form a surface treatment layer; (3) After step (2), on the TPO film layer The surface treatment layer is embossed;

(4) After step (3), the other surface of the TPO film layer is coated with polyurethane resin or polyolefin resin, dried to form a back surface treatment layer, and the automobile interior material is prepared.
A light-transmitting superconducting automotive interior material, characterized in that: the automotive interior material includes a surface treatment layer, a TPO film layer, and a back treatment layer arranged in sequence. The raw material formula of the TPO film layer is calculated in parts by weight. It includes 92-98 parts of modified TPO particles, 1-4 parts of additives and 1-4 parts of pigments, and the pigments are conductive pigments.
The light-transmitting superconducting automotive interior material according to claim 1, wherein the pigment is a pigment containing metal particles, and the particle size of the metal particles is 0.3 to 3 μm.
The light-transmitting superconducting automotive interior material according to claim 1, wherein the modified TPO particles are TPO particles of Mitsui's model RG-30.
The light-transmitting superconducting automotive interior material according to claim 1, wherein the auxiliary agent is a hindered amine light stabilizer.
The light-transmitting superconducting automotive interior material according to claim 1, wherein the thickness of the TPO film layer is 0.5±0.05 mm.
The light-transmitting superconducting automotive interior material according to claim 1, wherein the material used for the surface treatment layer is polyurethane resin.
The light-transmitting superconducting automotive interior material according to claim 8, wherein the material used for the surface treatment layer is a water-based polyurethane resin, and the water-based polyurethane resin is coated on one side of the TPO film layer , Curing to form the surface treatment layer.
The light-transmitting superconducting automotive interior material according to claim 1, wherein the material used for the back surface treatment layer is polyurethane or polyolefin resin.
The preparation method of the light-transmitting superconducting automotive interior material according to any one of claims 3 to 10, wherein the preparation method comprises the following steps:

(1) According to the formula, mix the modified TPO particles, additives and pigments uniformly, then melt and extrude and shape to obtain a TPO film;

(2) Coating polyurethane resin on one side of the TPO film layer prepared in step (1) and drying to form a surface treatment layer;

(3) After step (2), the other surface of the TPO film layer is coated with a polyurethane resin or a polyolefin resin, and dried to form a back surface treatment layer to prepare the automotive interior material.
The light-transmitting superconducting automotive interior material according to claim 11, characterized in that: the preparation method further comprises, after the treatment in step (2) and before the treatment in step (3), treating the surface on the TPO film layer The processing layer is embossed.