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] In another aspect, the present invention provides a method for preparing a part as described herein, comprising the steps of: providing the components of the polyethylene composition; and forming the components after melting.

[0007] In another aspect, the present invention relates to a roller blind assembly for a vehicle sunroof, comprising the components described herein.

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

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

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

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

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

[0013] Figure 3 : A schematic diagram of a cord guide block according to an embodiment of the present invention. DETAILED DESCRIPTION

[0014] General Definitions and Terminology

[0015] If not otherwise indicated, all publications, patent applications, patents and other references mentioned herein are incorporated herein by reference in their entirety. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the invention belongs. In the event of a conflict, the definitions provided herein shall prevail.

[0016] Unless otherwise indicated, all percentages, parts, ratios, etc. are by weight.

[0017] When quantity, concentration or other value or parameter is given as range, preferred range or preferred upper limit and lower limit or specific value, it should be understood as specifically disclosing all ranges formed by paired values ​​from any upper limit range or preferred value and any lower limit range or preferred value, regardless of whether the range is disclosed separately. Unless otherwise stated, when numerical range is quoted herein, the range refers to including its endpoints and integers and fractions within all such ranges. The scope of the present invention is not limited to the specific numerical value quoted when defining the range. For example, "1-8" covers 1, 2, 3, 4, 5, 6, 7, 8 and any sub-range consisting of any two values ​​therein, such as 2-6, 3-5.

[0018] The terms "about" and "approximately" when used with a numerical variable generally refer to the value of that variable and all values ​​of that variable are within experimental error (e.g., within a 95% confidence interval for the mean) or within ±10% of the specified value, or a wider range.

[0019] The terms "comprises", "includes", "has", "contains" or "involves" and other variations thereof herein are inclusive or open-ended and do not exclude other unlisted elements or method steps. It will be understood by those skilled in the art that the above terms such as "comprising" encompass 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 the optional presence of elements, steps or ingredients that do not substantially affect the basic and novel features of the claimed subject matter. It will be understood that the expression "comprising" encompasses the expressions "consisting essentially of" and "consisting of".

[0020] Unless otherwise specified, the terms "combination thereof" and "mixture thereof" refer to a multi-component mixture of the elements, such as a two-component mixture, a three-component mixture, a four-component mixture and the maximum possible multi-component mixture.

[0021] As used herein, the term "optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, and that the description includes both occurring and not occurring of said event or circumstance.

[0022] Unless otherwise specified, the "molecular weight of a polymer" and "relative molecular weight of a 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 measurement by a viscosity method using a viscometer.

[0023] Components for vehicle sunroofs

[0024] 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.

[0025] Polyethylene composition

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The polyethylene composition of the present application may include inorganic fillers. Suitable types and contents of inorganic fillers can adjust the rigid strength of the obtained parts 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 the parts in practical applications. In one embodiment, the inorganic filler of the present application includes: metal oxides, metal hydroxides, metal silicates or combinations thereof, preferably metal silicates. In a specific embodiment, the inorganic filler includes calcium silicate, sodium silicate, sodium aluminum silicate (sodium aluminosilicate), calcium hydroxosilicate (calcium hydroxosilicate) or a combination thereof. In a preferred embodiment, the inorganic filler is sodium aluminum silicate. In one embodiment, based on the gross 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.

[0030] The polyethylene composition of the present application may also contain nanomaterials. Nanomaterials refer to materials that have at least one dimension in the nanoscale range (1nm-100nm) in three-dimensional space or are composed of them as basic units. Adding suitable nanomaterials to the polyethylene composition can improve the elasticity of the components, make the components better buffer when subjected to force, and 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 but not limited to: one or more of nano aluminum oxide, nano titanium dioxide, nano zinc oxide, nano iron oxide, and nano zirconium oxide. In a preferred embodiment, the nanomaterial of the present application is nano aluminum oxide. 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.

[0031] The inorganic fillers, nanomaterials, etc. mentioned above, especially the preferred ones in the present application, can form a good matching effect with polyethylene, so that the obtained parts have good various properties.

[0032] The polyethylene composition of the present application may also include additives to further adjust product performance. The additive may include lubricating aids, masterbatch materials or other common additives in the art. The content of the additive may be adjusted according to actual needs. In one embodiment, based on the gross weight of the polyethylene composition, the content of the additive may be 0.01-5% by weight, preferably 0.5-4% by weight, such as 0.01% by weight, 1% by weight, 2% by weight, 3% by weight, 4% by weight, 5% by weight, etc.

[0033] Suitable lubricating aids can not only further reduce the friction and wear between the parts and the parts in contact with them, but also facilitate the smooth demoulding of the product during the 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, stearate 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% by weight, preferably 0.5-1% by weight, such as 0.2% by weight, 0.3% by weight, 0.5% by weight, 0.6% by weight, 0.8% by weight, 1% by weight, 1.2% by weight, 1.5% by weight, etc.

[0034] Masterbatch is a kind of aggregate made by uniformly attaching an extraordinary amount of pigment or dye to a resin. Adding masterbatch can give the product a desired color. In one embodiment, based on the gross weight of the polyethylene composition, the content of masterbatch can be 0.1-1% by weight, preferably 0.5-1% by weight, such as 0.1% by weight, 0.2% by weight, 0.3% by weight, 0.5% by weight, 0.6% by weight, 0.8% by weight, 1% by weight, etc.

[0035] 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, in another aspect, the present invention also relates to the use of the polyethylene composition as described above for preparing parts for vehicle sunroofs.

[0036] Components of the present invention

[0037] The thickness of the components of the present invention can be flexibly adjusted according to actual needs through appropriate material selection and structural design, and at the same time, high wear resistance, creep resistance and excellent quiet noise reduction effect can be maintained. With these advantages, the components of the present invention can be used as a variety of functional components in vehicle sunroofs. In particular, the components of the present invention are suitable for use as components of the motion device of the vehicle sunroof, and the motion device refers to a device that involves frequent movement during operation. More specifically, in the motion device of the 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 the vehicle sunroof assembly: roller blind assembly, glass assembly, motor assembly, mechanical group assembly, etc. In a specific embodiment, the components of the present application include: film edge strips, guide blocks, sliders, rolling components or combinations thereof.

[0038] In the present application, "film edge strip" has the meaning commonly understood in the art, for example, it may refer to a strip-shaped component located at a specific edge position. For example, for a roller blind assembly, it may refer to a long strip-shaped component located at the edge of the roller blind fabric. Its main function is to protect the edge of the roller blind fabric and prevent 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 during the raising and lowering process of the roller blind, it slides along the guide rail, playing 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 will not curl at the edge or detach from the guide rail during operation. In a specific embodiment, the film edge strip of the present application may refer to a fabric film edge strip. Figure 1 An exemplary structure of the cord film edge strip 20 is shown in FIG. 1 , wherein the cord film edge strip 20 is located at the edge of the cord 10 and is inserted into the guide rail 30 .

[0039] In the present application, "guide block" has the meaning commonly understood in the art, for example, it may refer to a block-shaped component that constrains the moving path or positioning position of other components. For example, in a roller blind assembly, the guide block may be a block-shaped component installed in the roller blind assembly, mainly used to guide the movement direction of the roller blind or locate the position of the curtain. The guide block may be located on both sides of the roller blind or at a specific position. In a specific embodiment, the guide block of the present application may refer to a curtain guide block. Figure 3 An exemplary structure of the cord guide block 60 is shown in FIG.

[0040] In the present application, "slider" has the meaning commonly understood in the art, for example, it may refer to a component with one or more smooth surfaces, which are designed to contact and achieve relative motion with other components (such as guide rails). For example, in a roller blind assembly, it may be located at the edge of the curtain, a mechanical group (such as a transmission mechanical group), a related structure in a guide device (such as a guide rail), or other key parts. The slider of the present application can effectively reduce the friction coefficient between contact surfaces, reduce wear between components, ensure smooth opening and closing of the roller blind, and extend the service life of the roller blind system. In a specific embodiment, the slider of the present application may refer to a roller blind slider, a mechanical group slider, or a combination thereof. Figure 2 An exemplary structure of the slider 40 is shown in FIG.

[0041] In this application, "rolling component" has the meaning commonly understood in the art, for example, it can refer to a component that realizes its function by rolling. For example, for a roller blind assembly, it is usually present on the edge of the curtain, the supporting structure or the transmission component, and reduces friction and assists the movement of the roller blind by rolling, reducing wear and tear, thereby extending the service life of the roller blind. In a specific embodiment, the rolling component of this application can refer to a roller.

[0042] In the present application, "chain cover" has the meaning commonly understood in the art, for example, it may refer to a component used to cover a chain. The chain cover can prevent rust and corrosion to a certain extent, and reduce the noise of the chain operation. In a specific embodiment, the chain cover of the present application may refer to a chain protective cover. Figure 2 An exemplary structure of a chain 50 is shown in FIG. 1 , wherein a chain protection cover is coated on the surface of the chain 50 .

[0043] Using the polyethylene composition of the present application as a raw material, various types of parts can be prepared by a suitable process. In one embodiment, the part 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 part is a positioning block, a slider or a rolling part, which can be made from the polyethylene composition of the present application by an injection molding process.

[0044] When the polyethylene composition of the present application is used to prepare a component, the thickness range of each position of the obtained component can be flexibly adjusted within a large range, and excellent performance can be maintained to meet the thickness requirements of different components. In other words, the polyethylene composition of the present application can be processed to obtain components of various types, with different thickness requirements and with desired excellent performance.

[0045] Specifically, for parts such as film side strips and chain covers that are expected to be thinned, thinning the thickness is conducive to saving space and achieving product refinement and miniaturization. Such parts made of the polyethylene composition of the present application still have excellent wear resistance and other desired properties even if the thickness is relatively thin. For parts such as sliders, guide blocks, rolling parts, etc. that have certain requirements on size and support, they need to have a certain rigidity. The parts made of the composition of the present application can also have the desired properties and achieve the functions of the parts.

[0046] In one embodiment, the thickness of the component of the present application can be 0.05mm-1.0mm. 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 0.05mm-1.0mm. The film forming process includes but is not limited to: 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 less than 0.1mm, preferably less than 0.08mm, such as 0.1mm, 0.09mm, 0.08mm, 0.07mm, 0.06mm, 0.05mm, etc. The thickness at the thinnest position of the component refers to the thickness of the position with the smallest thickness value determined by measuring and comparing the thickness of each part within the entire structure of the component. In another specific embodiment, the component of the present application is a slider, a guide block or a rolling component, and the thickness at its thickest position can be more than 0.3mm, such as 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 0.9mm, 1.0mm, etc. The thickness at the thickest position of a component refers to the thickness of the position with the largest thickness value determined by measuring and comparing the thickness of various parts of the component within the entire structural range of the component.

[0047] In one embodiment, the friction coefficient of the component of the present application is below 0.1, preferably below 0.06, and more preferably below 0.04. The component of the present application has a lower friction coefficient, so when the component interacts with adjacent components, the friction is significantly reduced, the degree of wear is effectively reduced, and the service life of the component is greatly extended. In addition, in the case where it is necessary to drive its operation with the help of an external power, the requirement for the required external force size is also reduced, which is conducive to improving energy efficiency and reducing operating costs. Herein, the friction coefficient of the component can be measured in the following manner: the sample is fixed on the surface of the carrier, the pressure head applies a 5N constant pressure in the vertical direction to the test surface, and the sample is moved to make it reciprocate within a specified distance at a speed of 10mm per one-way and a frequency of 1HZ (i.e., a linear velocity of 20mm / s), and the test time is 5min, and the real-time friction force suffered by the sample is recorded, and the reciprocating sliding friction coefficient of the sample is calculated.

[0048] The components of the present application also have good mechanical properties.

[0049] In one embodiment, the Shore hardness HD of the component of the present application can be about 50-70, for example, about 50, 55, 60, 62, 65, 68, 70, etc. Herein, Shore hardness HD can be used to indicate the hardness of a product, which can be measured according to standard GB / T2411-2008.

[0050] In one embodiment, the yield strength of the component of the present application can be about 20-50 MPa, for example, 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 a material begins to produce obvious plastic deformation under an external force such as tension or compression. Herein, the yield strength can be measured according to the standard GB / T 1033.1-2008.

[0051] In one embodiment, the tensile strength of the component of the present application can be about 20-50 MPa, for example, about 20 MPa, 22 MPa, 25 MPa, 28 MPa, 30 MPa, 32 MPa, 35 MPa, 40, etc. Tensile strength is the maximum stress value of a material to resist damage under a tensile load. It reflects the ultimate ability of a material to withstand tensile force. Herein, tensile strength can be measured according to standard GB / T 1033.1-2008.

[0052] The components of the present application have a low friction coefficient and good mechanical properties, and thus can exhibit excellent wear resistance, creep resistance and excellent noise reduction effects.

[0053] Preparation method of the component of the present application

[0054] In another aspect, the present application relates to a method for preparing a component for a vehicle sunroof, comprising the following steps: providing components of the polyethylene composition; and molding the components after melting.

[0055] In the process of preparing the component, appropriate condition parameters are adopted to give the component good various properties.

[0056] The components of the polyethylene composition may be provided in proportion and premixed, and then the premix may be melt extruded.

[0057] "Melt" refers to the process of heating the raw material blend to reach a molten state. During the melting process, the appropriate temperature helps the components to fully melt and have fluidity suitable for molding. In one embodiment, the temperature of the melting process is 170-240°C, preferably 190-220°C.

[0058] The melting process can be carried out under screw stirring. The screw speed can be 20-200 rpm, preferably 80-100 rpm. Suitable screw speed helps to evenly disperse the raw materials and improve the performance of the product.

[0059] "Molding" refers to the process of molding a molten material to obtain a product. Molding processes include, but are not limited to, extrusion molding, injection molding, etc. A suitable molding process can be selected according to the specific structure of the component. In the molding process, the molten material can be cooled to a solid state to obtain a product of a target shape. The cooling temperature of the molding process can be 10-40°C.

[0060] The equipment used in the above preparation process is not particularly limited, and those conventionally used in the art can be used. In the process of preparing the parts, the appropriate parameters used in this application are conducive to optimizing the performance of the product. These parameters can make the composition more excellent, thereby improving the performance of various aspects of the parts obtained by subsequent processing, thereby improving its quality and use effect.

[0061] In yet another aspect, the present application provides a component for a vehicle sunroof obtained by the preparation method as described above.

[0062] Roller blind assembly and window assembly for vehicle sunroof

[0063] In another aspect, the present invention provides a vehicle sunroof roller blind assembly, which includes the components of the present invention as described above. It is understood by those skilled in the art that the vehicle sunroof roller blind assembly may also include other components or devices necessary for realizing the roller blind function, including but not limited to: a curtain fabric, a guide device (such as a guide rail), a transmission device, etc.

[0064] In yet another aspect, the present invention provides a vehicle sunroof assembly, comprising the component and / or a roller blind assembly of a vehicle sunroof as described above.

[0065] Beneficial Effects

[0066] The components for vehicle sunroofs of the present invention have excellent properties, such as high wear resistance, creep resistance and excellent noise reduction effects, through appropriate material selection and structural design, and the thickness of the components can be flexibly adjusted according to actual needs, and can be used as a variety of functional components in vehicle sunroofs.

[0067] Example

[0068] The solution of the present invention is further described in detail below in conjunction with specific embodiments.

[0069] It should be noted that the following examples are merely examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the present invention. For those skilled 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 exhaustively list all the embodiments here, and the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention. Unless otherwise specified, the instruments, equipment and reagents used herein are all commercially available.

[0070] The samples of the examples of the present application were prepared according to the following process.

[0071] Table 1

[0072]

[0073] Example 1

[0074] The raw materials are blended in the amounts shown in Table 1 and then melted (the heating temperature is 190-220°C and the screw speed is 80-100rpm). After extrusion casting, the samples are cooled and shaped (the cooling temperature is 10-40°C). Subsequently, the samples are corona treated, trimmed and wound to obtain film samples. The samples are cut into the target size of the cord film edge strip samples of Example 1 according to the size requirements of the film edge strips, and the thickness is 0.6mm.

[0075] Example 2

[0076] The raw materials were blended in the amounts shown in Table 1 and then melted (heating temperature was 190-220°C, screw speed was 80-100rpm), injection molded into a mold, and then cooled and shaped (cooling temperature was 10-40°C) to obtain the slider sample of Example 2.

[0077] Performance Testing

[0078] The samples of the embodiment were subjected to performance tests, and the test methods and results are shown below. According to Table 2 below, the components of the present application have a lower friction coefficient and perform well in terms of mechanical properties.

[0079] Table 2

[0080]

[0081] Note: The friction coefficient is measured in the following way: fix the sample on the surface of the support platform, apply a constant pressure of 5N in the vertical direction to the test surface, move the sample to make it reciprocate within the specified distance at a speed of 10mm per stroke and 1Hz (i.e., linear speed of 20mm / s), and the test time is 5min. Record the real-time friction force on the sample and calculate the reciprocating sliding friction coefficient of the sample.

[0082] It will be clear to those skilled in the art that many modifications and variations of the present invention may be made without departing from its spirit and scope. The specific embodiments described herein are provided only by way of example and are not intended to be limited in any way. The true scope and spirit of the present invention are shown by the appended claims, and the description and examples are merely exemplary.

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 or combinations thereof; Preferably, the components include: curtain film edge strips, curtain guide blocks, roller blind sliders, mechanical group sliders, rollers, chain protection covers 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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