Component for vehicle sunroof, preparation method of component, sun curtain rolling assembly of vehicle sunroof and vehicle window assembly

Abstract

The invention relates to a component for a vehicle sunroof and a preparation method thereof, the component comprises a polyethylene composition, and based on the total weight of the polyethylene composition, the polyethylene composition comprises 80-99.7 wt% of polyethylene, 0.01-10 wt% of an inorganic filler, 0.01-5 wt% of a nanomaterial and 0.01-5 wt% of an additive, and the additive comprises a color master batch material, a lubricating auxiliary agent or a combination of the color master batch material and the lubricating auxiliary agent. The invention further relates to a rolling sun curtain assembly of a vehicle sunroof comprising the component and a vehicle sunroof assembly. The thickness of the component can be flexibly adjusted according to actual requirements, and high wear resistance, creep resistance and excellent mute and noise reduction effects are kept. By means of the advantages, the component can be used as various functional components in the vehicle sunroof, and the component plays a positive role in design of the space in the vehicle and the sunroof function.

Description

Technical Field

[0001] The present invention relates to the field of vehicle sunroofs, and more specifically to a component for a vehicle sunroof and a preparation method thereof, a rolling sunshade assembly of a vehicle sunroof, and a vehicle window assembly. Background Art

[0002] As living standards improve, car consumers not only pay attention to car driving performance and safety, but also have higher requirements for the in-car environment. In the design of modern cars, skylights installed on the roof of vehicles have become a common configuration, especially panoramic skylights, which bring a wider field of view and good lighting effects to the car. In order to further improve the comfort of riding and driving, skylights are usually equipped with roller blinds.

[0003] When the sunshade assembly is in operation, there are certain positions where friction often occurs. These positions with frequent friction are easily worn, which in turn leads to a decrease in the performance of the entire sunshade. For example, the curtain film edge strip of the sunshade and the guide rail of the sunshade belong to this kind of frequent friction. At present, the material commonly used for the curtain film edge strip of the sunshade is TPV (Thermoplastic Vulcanizate), which has a thickness of about 0.7mm. The wear resistance of this existing film edge strip material is poor, and it is easy to wear due to friction with the guide rail. With the continuous increase in the use time, the degree of wear of the film edge strip material increases, and the friction between it and the guide rail will gradually increase. This increase in friction will not only cause noise and destroy the quiet and comfortable environment in the car, but also affect the smoothness of the opening and closing of the sunshade, so that passengers have a poor experience when operating the sunshade. More seriously, long-term friction may cause the film edge strip to break. Once the film edge strip breaks, the function of the sunshade will be damaged, greatly reducing the comfort of the ride. Summary of the invention

[0004] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a component for a vehicle sunroof. Through appropriate material selection and structural design, the thickness of the component of the present invention can be flexibly adjusted according to actual needs, and at the same time, high wear resistance, creep resistance and excellent mute noise reduction effect can be maintained. With these advantages, the component of the present invention can be used as a variety of functional components in a vehicle sunroof.

[0005] In one aspect, the present invention provides a component for a vehicle sunroof, the component comprising a polyethylene composition, based on the total weight of the polyethylene composition, the polyethylene composition comprising: 80-99.7 wt% of polyethylene, 0.01-10 wt% of inorganic filler, 0.01-5 wt% of nanomaterial and 0.01-5 wt% of additives, the additive comprising: masterbatch material, lubricating aid or a combination thereof.

[0006] On the other hand, the present invention provides a method for preparing a component as described herein, which comprises the steps of: providing each component of the polyethylene composition; and melting and molding each component.

[0007] On the other hand, the present invention relates to a roller blind assembly for a vehicle sunroof, which comprises the component described herein.

[0008] In yet another aspect, the present invention relates to a vehicle sunroof assembly, which comprises the component described herein and / or the roller blind assembly for a vehicle sunroof.

[0009] In yet another aspect, the present invention relates to the use of the polyethylene composition as defined herein for preparing a component for a vehicle sunroof. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Other features and advantages of the present invention will be better understood from the following alternative embodiments described in detail in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar components, wherein:

[0011] Figure 1 : Schematic diagram of a curtain film edge strip according to an embodiment of the present invention;

[0012] Figure 2 : Schematic diagram of a slider and a chain according to an embodiment of the present invention;

[0013] Figure 3 : Schematic diagram of a curtain guide block according to an embodiment of the present invention.

[0014] Figure 4 : Schematic diagram of a chain return pipe and a chain drive pipe according to an embodiment of the present invention. DETAILED DESCRIPTION

[0015] General Definitions and Terms

[0016] All publications, patent applications, patents, and other references mentioned herein are incorporated herein by reference in their entirety unless otherwise indicated. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the definitions provided herein shall prevail.

[0017] Unless otherwise specified, all percentages, parts, ratios, etc. are by weight.

[0018] When a quantity, concentration, or other value or parameter is given as a range, a preferred range, or a preferred upper and lower value, or as a specific value, it is to be understood as specifically disclosing all ranges formed from any pair of upper range or preferred values and any lower range or preferred values, whether or not the ranges are separately disclosed. Unless otherwise stated, when a numerical range is recited herein, the range is meant to include its endpoints, as well as all integers and fractions within that range. The scope of the present invention is not limited to the specific numerical values recited when defining the range. For example, "1-8" encompasses 1, 2, 3, 4, 5, 6, 7, 8, and any sub-range formed by any two of these values, such as 2-6, 3-5.

[0019] The terms "about" or "approximately", when used in conjunction with a numerical variable, generally refer to the value of that variable and all values of that variable within the experimental error (e.g., within a 95% confidence interval for the mean) or within ±10% of the specified value, or a wider range.

[0020] The terms "comprising", "including", "having", "containing", or "involving" and their other variant forms herein are inclusive or open-ended and do not exclude other unrecited elements or method steps. Those skilled in the art should understand that the above terms such as "comprising" cover the meaning of "consisting of". The expression "consisting of" excludes any element, step, or ingredient not specified. The expression "consisting essentially of" means that the scope is limited to the specified elements, steps, or ingredients, plus any elements, steps, or ingredients that optionally exist and do not substantially affect the basic and novel features of the claimed subject matter. It should be understood that the expression "including" covers the expressions "consisting essentially of" and "consisting of".

[0021] Unless otherwise stated, the terms "combinations thereof" and "mixtures thereof" refer to multi-component mixtures of the respective elements, such as two, three, four, and up to the maximum possible multi-component mixtures.

[0022] As used herein, the term "optionally" or "optionally" means that the subsequent described event or circumstance may or may not occur, and this description includes both the occurrence and non-occurrence of the described event or circumstance.

[0023] Unless otherwise stated, the "molecular weight of the polymer" and "relative molecular weight of the polymer" herein refer to the viscosity-average molecular weight of the polymer, also known as the viscosity-average molecular weight, which can be obtained from the supplier or measured by conventional methods and instruments in the art, such as by using a viscometer through viscometry.

[0024] Components for Vehicle Sunroof

[0025] The component for a vehicle sunroof of the present invention comprises a polyethylene composition, which comprises, based on the total weight of the polyethylene composition, 80-99.7 wt % of polyethylene, 0.01-10 wt % of an inorganic filler, 0.01-5 wt % of a nanomaterial and 0.01-5 wt % of an additive, wherein the additive comprises a masterbatch material, a lubricating aid or a combination thereof.

[0026] Polyethylene composition

[0027] In the polyethylene composition, polyethylene is the main material. Polyethylene has certain elasticity and good corrosion resistance, and its thermoplastic properties reduce the processing difficulty of the product.

[0028] In the polyethylene composition, polyethylene plays a key role as the main material. Polyethylene has a certain elasticity, which allows the product to deform appropriately when subjected to force, and can return to its original state after the external force disappears, providing buffering and adaptability. Moreover, polyethylene has good anti-aging properties and can maintain stable performance for a long time. In addition, its thermoplastic properties make product processing more convenient, easy to soften and flow after heating, can adapt to a variety of processing techniques, and reduce the difficulty of processing. The appropriate content of polyethylene is conducive to the realization of the above-mentioned advantages. In one embodiment, based on the gross weight of the polyethylene composition, the content of polyethylene can be 80-99.7% by weight, preferably 85-92% by weight, such as 80% by weight, 82% by weight, 84% by weight, 85% by weight, 86% by weight, 88% by weight, 90% by weight, 92% by weight, 94% by weight, 95% by weight, 96% by weight, 98% by weight, 99.7% by weight, etc.

[0029] For the purpose of further improving performance (such as: improving wear resistance, creep resistance, etc.), the present application can use polyethylene with a higher molecular weight. In one embodiment, the relative molecular weight of the polyethylene of the present application can be about 1 million to 5 million, for example, about 1 million, 1.2 million, 1.5 million, 1.8 million, 2 million, 2.2 million, 2.5 million, 2.8 million, 3 million, 3.2 million, 3.5 million, 3.8 million, 4 million, 4.2 million, 4.5 million, 4.8 million, 5 million, etc. The parts of the present application made using polyethylene with a higher molecular weight not only have good wear resistance, but also have significant advantages in creep resistance, noise reduction, impact resistance, anti-adhesion, self-lubricating properties, etc.

[0030] The polyethylene composition of the present application may include inorganic fillers. Inorganic fillers of suitable types and contents can adjust the rigid strength of the prepared components, so that they can maintain a certain shape stability when subjected to different forms of external forces such as tension, compression or bending, and better meet the specific requirements for the rigid strength of components in practical applications. In one embodiment, the inorganic fillers of the present application include: metal oxides, metal hydroxides, metal silicates or combinations thereof, preferably metal silicates. In a specific embodiment, the inorganic fillers include calcium silicate, sodium silicate, sodium aluminosilicate, calcium hydroxosilicate or combinations thereof. In a preferred embodiment, the inorganic filler is sodium aluminosilicate. In one embodiment, based on the total weight of the polyethylene composition, the content of the inorganic filler can be 0.01-10% by weight, preferably 6-10% by weight, more preferably 4-8% by weight, such as 0.01% by weight, 1% by weight, 2% by weight, 3% by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, etc.

[0031] The polyethylene composition of the present application may also include nanomaterials. Nanomaterials refer to materials in which at least one dimension is in the nanoscale range (1 nm - 100 nm) in three-dimensional space or materials composed of them as basic units. Adding suitable nanomaterials to the polyethylene composition can improve the elasticity of the components, make the components buffer better when stressed, and also enhance the wear resistance of the components and extend their service life. The nanomaterials of the present application may include nano metal oxides, such as including but not limited to: one or more of nano alumina, nano titanium dioxide, nano zinc oxide, nano iron oxide, nano zirconium oxide. In a preferred embodiment, the nanomaterial of the present application is nano alumina. In one embodiment, based on the total weight of the polyethylene composition, the content of the nanomaterial can be 0.01-5% by weight, preferably 0.1-4% by weight, more preferably 0.1-1% by weight, such as 0.01% by weight, 1% by weight, 2% by weight, 3% by weight, 4% by weight, 5% by weight, etc.

[0032] The above-mentioned inorganic fillers, nanomaterials, etc. of the present application, especially the preferred ones, can form a good matching effect with polyethylene, so that the resulting components have good various properties.

[0033] The polyethylene composition of the present application may further comprise additives to further adjust the product properties. The additives may include lubricating aids, masterbatch materials or other common additives in the art. The content of the additives can be adjusted according to actual needs. In one embodiment, based on the total weight of the polyethylene composition, the content of the additives can be 0.01-5 wt%, preferably 0.5-4 wt%, such as 0.01 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, 5 wt%, etc.

[0034] Suitable lubricating aids can not only further reduce the friction between the part and the parts in contact therewith, reduce wear, but also facilitate the smooth demolding of the product during processing. The lubricating aids available in the present application may include: fatty acid compounds, fatty acid ester compounds, polyolefin wax compounds, amide compounds or combinations thereof. In a preferred embodiment, the lubricating aid of the present application is a stearic acid compound, such as stearic acid, stearic acid ester or a combination thereof. In one embodiment, based on the total weight of the polyethylene composition, the content of the lubricating aid can be 0.2-1.5 wt%, preferably 0.5-1 wt%, such as 0.2 wt%, 0.3 wt%, 0.5 wt%, 0.6 wt%, 0.8 wt%, 1 wt%, 1.2 wt%, 1.5 wt%, etc.

[0035] The masterbatch material is an aggregate obtained by uniformly loading an ultra-large amount of pigment or dye into a resin. Adding the masterbatch material can impart the desired color to the product. In one embodiment, based on the total weight of the polyethylene composition, the content of the masterbatch material can be 0.1-1 wt%, preferably 0.5-1 wt%, such as 0.1 wt%, 0.2 wt%, 0.3 wt%, 0.5 wt%, 0.6 wt%, 0.8 wt%, 1 wt%, etc.

[0036] The types and contents of the components of the polyethylene composition in the present application are reasonably matched, making it suitable for preparing parts with good performance. Therefore, on the other hand, the present invention also relates to the use of the polyethylene composition as described above for preparing parts for vehicle sunroofs.

[0037] The parts of the present invention

[0038] The components of the present invention can have their thickness adjusted flexibly according to actual requirements through appropriate material selection and structural design, and at the same time can maintain high wear resistance, creep resistance, and excellent noise reduction effects. With these advantages, the components of the present invention can be used as various functional components in vehicle sunroofs. In particular, the components of the present invention are suitable for use as components of the moving device of a vehicle sunroof, where the moving device refers to a device involving frequent movement during operation. More specifically, in the moving device of a vehicle sunroof, the components of the present invention can be those components that have a contact interface with adjacent components and undergo frequent relative displacement during operation. The components of the present invention can be used in the following components of a vehicle sunroof assembly: a roller blind assembly, a glass assembly, a motor assembly, a mechanical assembly, etc. In a specific embodiment, the components of the present application include: a film edge strip, a guide block, a slider, a rolling component, a chain covering, a sleeve, or a combination thereof.

[0039] In the present application, the "film edge strip" has the meaning commonly understood in the art, for example, it can refer to a strip-shaped component located at a specific edge position. For example, for a roller blind assembly, it can refer to a long strip-shaped component located at the edge of the roller blind fabric. Its main function is to protect the edge part of the roller blind fabric, preventing the edge of the fabric from being worn, torn, or deformed. The film edge strip is usually in close contact with the guide rail and slides along the guide rail during the up and down movement of the roller blind, serving a dual role of guiding the movement direction of the fabric and reducing edge friction. At the same time, the film edge strip can also enhance the overall stability of the roller blind fabric, ensuring that the fabric does not curl at the edge or deviate from the guide rail during operation. In a specific embodiment, the film edge strip of the present application can refer to a curtain fabric film edge strip. Figure 1 An exemplary structure of the curtain fabric film edge strip 20 is shown in, where the curtain fabric film edge strip 20 is located at the edge of the curtain fabric 10 and is inserted into the guide rail 30.

[0040] In the present application, the "guide block" has the meaning commonly understood in the art, for example, it can refer to a block-shaped component that restricts the movement path or positioning position of other components. For example, in a roller blind assembly, the guide block can be a block-shaped component installed in the roller blind assembly, mainly used to guide the movement direction of the roller blind or position the curtain fabric. The guide block can be located on both sides or specific positions of the roller blind. In a specific embodiment, the guide block of the present application can refer to a curtain fabric guide block. Figure 3 An exemplary structure of the curtain fabric guide block 60 is shown in.

[0041] In this application, the "slider" has the meaning commonly understood in the art. For example, it can refer to a component having one or more smooth surfaces, which are for contacting other components (such as guide rails) and achieving relative movement. For example, in a rolling sunshade curtain assembly, it can be located at the edge of the curtain fabric, on the mechanical group (such as the transmission mechanical group), on the relevant structure of the guiding device (such as the guide rail), or other key positions. The slider of this application can effectively reduce the friction coefficient between contact surfaces, reduce wear between components, ensure the smooth opening and closing of the rolling sunshade curtain, and extend the service life of the rolling sunshade curtain system. In a specific embodiment, the slider of this application can refer to a rolling sunshade curtain slider, a mechanical group slider, or a combination thereof. Figure 2 An exemplary structure of the slider 40 is shown.

[0042] In this application, the "rolling component" has the meaning commonly understood in the art. For example, it can refer to a component that realizes its function through rolling. For example, for a rolling sunshade curtain assembly, it usually exists at the edge of the curtain fabric, on the support structure, or on the transmission component, reducing friction and assisting the movement of the rolling sunshade curtain through rolling, reducing wear, and thus extending the working life of the rolling sunshade curtain. In a specific embodiment, the rolling component of this application can refer to a roller.

[0043] In this application, the "chain covering part" has the meaning commonly understood in the art. For example, it can refer to a component used to cover the chain. The chain covering part of this application can prevent rust and corrosion to a certain extent and reduce the noise generated during the operation of the chain. In a specific embodiment, the chain covering part of this application can refer to a chain protection sleeve. Figure 2 An exemplary structure of the chain 50 is shown, wherein the chain protection sleeve covers the surface of the chain 50.

[0044] In this application, the "casing" has the meaning commonly understood in the art. For example, it can refer to a tubular structure used to accommodate, guide, restrain, or protect components (such as moving components like chains). For example, for a rolling sunshade curtain assembly, the casing can usually be located on the movement path of the chain. It can guide the movement direction of the chain, restrain the movement trajectory of the chain, and at the same time play a protective role such as preventing the chain from wearing. In a specific embodiment, the casing of this application can refer to a chain return pipe, a chain drive pipe, or a combination thereof. In the mechanical group, the chain can pass through the chain drive pipe and the chain return pipe and run along a predetermined route. The casing of this application can significantly reduce the friction between its pipe wall and the chain, thereby reducing the wear of both, extending the service life, and also reducing the noise generated during the operation of the chain. Figure 4 An exemplary structure of the chain return pipe 70 and the chain drive pipe 80 is shown.

[0045] Using the polyethylene composition of the present application as a raw material, various types of components can be prepared by suitable processes. In one embodiment, the component is a film edge strip or a chain covering, which can be made from the polyethylene composition of the present application by an extrusion process, such as an extrusion casting process. In one embodiment, the component is a positioning block, a slider, a sleeve or a rolling component, which can be made from the polyethylene composition of the present application by an injection molding process.

[0046] When using the polyethylene composition of the present application to prepare components, the thickness range at each position of the obtained components can be flexibly adjusted within a large range, and excellent properties can be maintained to meet the thickness requirements of different components for themselves. That is to say, the polyethylene composition of the present application can be processed to obtain various types of components with different thickness requirements and desired excellent properties.

[0047] Specifically, for components such as film edge strips and chain coverings where thickness reduction is desired, reducing the thickness is beneficial for saving space and achieving product refinement and miniaturization. Such components made from the polyethylene composition of the present application still have excellent wear resistance and other desired properties even when the thickness is relatively thin. For components such as sliders, guide blocks, rolling components, and sleeves that have certain requirements for size and support, they need to have a certain rigidity, and the components made from the composition of the present application can also possess the desired properties and achieve the functions of the components.

[0048] In one embodiment, the thickness of the component of the present application can be 0.05 mm - 1.0 mm. In a specific embodiment, the component of the present application is made by a film forming process, and the thickness of the component can be 0.05 mm - 1.0 mm. The film forming process includes but is not limited to: an extrusion casting process. In a specific embodiment, the component of the present application is a film edge strip or a chain covering, and the thickness at its thinnest position can be below 0.1 mm, preferably below 0.08 mm, such as 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm, 0.06 mm, 0.05 mm, etc. The thickness at the thinnest position of the component refers to the thickness value of the position with the smallest thickness determined by measuring and comparing the thicknesses of its various parts within the entire component structure range. In another specific embodiment, the component of the present application is a slider, a guide block, a sleeve or a rolling component, and the thickness at its thickest position can be above 0.3 mm, such as 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc. The thickness at the thickest position of the component refers to the thickness value of the position with the largest thickness determined by measuring and comparing the thicknesses of its various parts within the entire component structure range.

[0049] In one embodiment, the coefficient of friction of the components of the present application is below 0.1, preferably below 0.06, and more preferably below 0.04. The components of the present application have a low coefficient of friction. Therefore, when the components interact with adjacent components, the friction is significantly reduced, the degree of wear is effectively reduced, and thus the service life of the components is greatly extended. Moreover, in the case where external power is required to drive their operation, the requirement for the magnitude of the external force is also reduced, which is beneficial to improving energy utilization efficiency and reducing operating costs. Herein, the coefficient of friction of the components can be measured in the following manner: fix the sample on the surface of the loading platform, apply a constant vertical pressure of 5N to the test surface by the indenter, move the sample to make a reciprocating motion within a specified distance at a speed of 10mm per one-way stroke and a frequency of 1HZ (i.e., a linear velocity of 20mm / s), the test time is 5min, record the real-time frictional force received by the sample, and calculate the reciprocating sliding coefficient of friction of the sample.

[0050] The components of the present application also have good mechanical properties.

[0051] In one embodiment, the Shore hardness HD of the components of the present application can be about 50 - 70, such as about 50, 55, 60, 62, 65, 68, 70, etc. Herein, the Shore hardness HD can be used to represent the hardness of the product, and it can be measured according to the standard GB / T 2411 - 2008.

[0052] In one embodiment, the yield strength of the components of the present application can be about 20 - 50 Mpa, such as about 20 Mpa, 22 Mpa, 25 Mpa, 28 Mpa, 30 Mpa, 32 Mpa, 35 Mpa, 40 Mpa, etc. The yield strength is used to describe the stress value when the material begins to produce obvious plastic deformation under external forces such as tension or compression. Herein, the yield strength can be measured according to the standard GB / T 1033.1 - 2008.

[0053] In one embodiment, the tensile strength of the components of the present application can be about 20 - 50 Mpa, such as about 20 Mpa, 22 Mpa, 25 Mpa, 28 Mpa, 30 Mpa, 32 Mpa, 35 Mpa, 40, etc. The tensile strength is the maximum stress value that the material resists destruction under tensile load. It reflects the ultimate ability of the material to withstand tensile force. Herein, the tensile strength can be measured according to the standard GB / T 1033.1 - 2008.

[0054] The components of the present application have a low coefficient of friction and good mechanical properties, and thus can exhibit excellent wear resistance, creep resistance and excellent noise reduction effect.

[0055] Preparation Method of Components of This Application

[0056] On the other hand, the present application relates to a method for preparing a component for a vehicle sunroof, which comprises the following steps: providing the components of the polyethylene composition; and melting and molding the components.

[0057] During the preparation of the component, appropriate condition parameters are adopted to endow the component with good various performances.

[0058] The components of the polyethylene composition can be provided in proportion and premixed, and then the premix is melt-extruded.

[0059] "Melting" refers to the process of heating the raw material blend to reach the molten state. During the melting process, appropriate temperature helps the components to be fully melted and have fluidity suitable for molding processing. In one embodiment, the temperature of the melting process is 170 - 240 °C, preferably 190 - 220 °C.

[0060] The melting process can be carried out under the agitation of a screw. The rotational speed of the screw can be 20 - 200 rpm, preferably 80 - 100 rpm. Appropriate screw rotational speed helps the uniform dispersion of the raw materials and improves the performance of the product.

[0061] "Molding" refers to the process of obtaining a product by molding the melt. The molding processes include but are not limited to: extrusion molding, injection molding, etc. According to the specific structure of the component, a suitable molding process can be selected. In the molding process, the melt can be cooled to reach the solid state, so as to obtain a product with the target shape. The cooling temperature during the molding process can be 10 - 40 °C.

[0062] There is no special limitation on the equipment used in the above preparation process, and those commonly used in the art can be used. During the preparation of the component, the appropriate parameters adopted in the present application are beneficial to optimizing the performance of the product. These parameters can make the performance of the composition better, and then improve the performance of the component obtained by subsequent processing in all aspects, thus improving its quality and usage effect.

[0063] In yet another aspect, the present application provides a component for a vehicle sunroof obtained by the preparation method as described above.

[0064] Rolling Shade Assembly and Window Assembly of Vehicle Sunroof

[0065] In another aspect, the present invention provides a vehicle sunroof roller blind assembly, which comprises the component of the present invention as described above. Those skilled in the art understand that the roller blind assembly of the vehicle sunroof may further comprise other components or devices necessary for realizing the roller blind function, including but not limited to: curtain fabric, guiding device (such as guide rail), transmission device, etc.

[0066] In yet another aspect, the present invention provides a vehicle sunroof assembly, which includes the components described above and / or the roller blind assembly of the vehicle sunroof.

[0067] Beneficial Effects

[0068] The components of the present invention for vehicle sunroofs have excellent various properties, such as high wear resistance, creep resistance, and excellent noise reduction effect, etc., through appropriate material selection and structural design. Moreover, the thickness of the components can be flexibly adjusted according to actual needs and can be used as various functional components in vehicle sunroofs.

[0069] Embodiment

[0070] The solution of the present invention will be further described in detail below in conjunction with specific embodiments.

[0071] It should be noted that the following embodiments are merely examples for clearly illustrating the technical solutions of the present invention and are not limitations on the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present invention. Unless otherwise specified, the instrument devices and reagent materials used herein can be obtained commercially.

[0072] Samples of the embodiments of the present application are prepared according to the following process.

[0073] Table 1

[0074]

[0075] Example 1

[0076] Select and blend raw materials according to the amounts shown in Table 1 and then melt them (heating temperature is 190 - 220 °C, screw speed is 80 - 100 rpm), extrude and then cool and shape (cooling temperature is 10 - 40 °C), then perform corona treatment, trimming, and winding to obtain a film sample. Cut the film sample of the curtain fabric edge strip of Example 1 into the target size according to the size requirements of the film edge strip, and its thickness is 0.6 mm.

[0077] Example 2

[0078] Select and blend raw materials according to the amounts shown in Table 1 and then melt them (heating temperature is 190 - 220 °C, screw speed is 80 - 100 rpm), inject them into a mold, and then cool and shape (cooling temperature is 10 - 40 °C) to obtain the slider sample of Example 2.

[0079] Performance Test

[0080] The performance of the samples of the embodiments was tested, and the test methods and results are shown below. As can be seen from Table 2 below, the components of the present application have a low coefficient of friction and perform well in terms of mechanical properties.

[0081] Table 2

[0082]

[0083] Note: The coefficient of friction of "*" was measured as follows: The sample was fixed on the surface of the bearing table, the indenter applied a constant pressure of 5 N in the vertical direction to the test surface, the sample was moved to reciprocate within a specified distance at a speed of 10 mm per one-way and a frequency of 1 HZ (i.e., a linear speed of 20 mm / s), the test time was 5 min, the real-time frictional force received by the sample was recorded, and the reciprocating sliding friction coefficient of the sample was calculated.

[0084] Those skilled in the art will appreciate that many modifications and variations of the present invention can be made without departing from its spirit and scope. The specific embodiments described herein are provided by way of example only and are not meant to limit in any way. The true scope and spirit of the present invention are shown by the appended claims, and the specification and examples are merely illustrative.

Claims

1. A component for a vehicle sunroof, comprising a polyethylene composition, characterized in that: Based on the total weight of the polyethylene composition, the polyethylene composition comprises: 80-99.7% by weight of polyethylene, 0.01-10% by weight of inorganic filler, 0.01-5 wt% of nanomaterials, and 0.01-5 wt % of additives, the additives comprising: masterbatch material, lubricating aid or a combination thereof.

2. The component according to claim 1, characterized in that The relative molecular weight of the polyethylene is 1-5 million.

3. The component according to claim 1, characterized in that The inorganic filler includes: metal oxides, metal hydroxides, metal silicates or a combination thereof, preferably metal silicates. More preferably, the inorganic material comprises: calcium silicate, sodium silicate, sodium aluminum silicate, calcium hydrogen silicate or a combination thereof.

4. The component according to claim 1, characterized in that The nanomaterials include nano metal oxides. Preferably, the nanomaterial includes nano-aluminum oxide, nano-titanium dioxide, nano-iron oxide, nano-zinc oxide, nano-zirconium oxide or a combination thereof.

5. The component according to claim 1, characterized in that The lubricating additive includes: fatty acid compounds, fatty acid ester compounds, polyolefin wax compounds, amide compounds or a combination thereof; Preferably, the lubricating aid comprises: stearic acid, stearate or a combination thereof.

6. The component according to claim 1, characterized in that The components include: film edge strips, guide blocks, sliders, rolling components, chain covers, sleeves or combinations thereof; Preferably, the components include: curtain film edge strips, curtain guide blocks, roller blind sliders, mechanical group sliders, rollers, chain protection sleeves, chain return pipes, chain drive pipes or combinations thereof.

7. The component according to claim 1, characterized in that The thickness of the component is 0.05 mm-1.0 mm.

8. A roller blind assembly for a vehicle sunroof, comprising the component according to any one of claims 1 to 7.

9. A vehicle sunroof assembly, comprising the component according to any one of claims 1 to 7 and / or the roller blind assembly according to claim 8.

10. A method for preparing a component according to any one of claims 1 to 7, comprising the following steps: Providing the components of the polyethylene composition; as well as The components are melted and then formed.

11. The method according to claim 10, characterized in that The temperature of the melting process is 170-240°C, preferably 190-220°C; and / or The melting process is carried out under screw stirring, and the screw speed is 20-200rpm, preferably 80-100rpm; and / or The cooling temperature during the molding process is 10-40°C.

12. Use of a polyethylene composition as defined in any one of claims 1 to 5 for the preparation of a component for a vehicle sunroof.

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