Automobile skylight full-shading roller shutter composite fabric with nine-functional-layer structure

Abstract

The invention provides an automobile skylight full-shading roller shutter composite fabric with a nine-functional-layer structure, and relates to the technical field of automobile textiles. The nine-functional-layer structure sequentially comprises a graphene far infrared emission yarn layer, a connection yarn layer, a rare earth far infrared absorption heating yarn layer, a first PUR connection point layer, a first aluminized heat reflection layer, a film layer, a second aluminized heat reflection layer, a second PUR connection point layer and an interior fabric layer from top to bottom. The woven fabric with the radiation cooling function and the composite fabric of the nine functional layers of the woven fabric have the capability of reversely emitting sunlight heat penetrating through skylight glass on the top of an automobile to the atmosphere outside the automobile and even the outer space through the skylight glass through absorption reflection and infrared radiation; and the aluminum-plated layer on the lower layer of the film can reduce the cold loss of a passenger compartment. The functions of cooling, heat insulation, cold insulation, shading, beautification and decoration of the nine-layer composite skylight roller shutter fabric for the vehicle are achieved through the effects of absorption, reflection and anti-radiation of infrared rays.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automotive textiles, in particular to a full-shading roller blind composite fabric for automobile sunroof with nine functional layers. BACKGROUND

[0002] The sunroof was first designed and manufactured by the German company Webasto in the 1930s and applied to a luxury car brand, which can effectively improve the ventilation and lighting inside the car. In the early era of fuel vehicles, the sunroof was generally manually opened and closed, and the equipment rate was very low, and the product and technology developed slowly. Until the 1960s, the penetration rate of the sunroof did not exceed 10-20%, and it was only applied to the top of luxury cars; in the mid-1990s, Chinese sunroof production enterprises began to start production, and during this period, the sunroof configuration rate gradually climbed to 30-40%, and began to popularize to mid-low brands. In the first decade of this century, the panoramic sunroof technology matured and the penetration rate further improved to more than 50%, and some brands fully equipped sunroofs. After 2020, the penetration rate of the sunroof exceeds 65%, and the panoramic sunroof accounts for more than 70% of the sunroof configuration in passenger cars, becoming the mainstream configuration. In particular, after the development of new energy vehicles in China, electric sunroofs have become standard, and large SUVs have fully equipped panoramic electric sunroofs.

[0003] As the interior textile and its composite structure on the sunroof glass sunshade mechanism have also undergone several generations of development:

[0004] 1. In the early stage of sunroof technology development, the sunroof was manually opened and closed, and the sunshade board below the sunroof was a manual pull plate. The inner side of the pull plate is attached to the interior fabric to keep the overall interior style of the roof consistent. The inner side of the manual pull plate can be directly attached to the automotive interior fabric, or the automotive interior fabric can be compounded with a thin sponge and then attached to the inner side of the pull plate.

[0005] 2. Later, the sunroof control mode replaced the manual mode with an electric mode, and the rigid sunshade opening and closing device of the pull plate below the sunroof gradually transitioned to the flexible opening and closing winding device of the electric roller blind. The interior sunshade fabric is no longer attached to the inner side of the rigid pull plate, but is directly electrically wound or stretched out for use. It can be a single layer of interior fabric or a three-in-one composite structure fabric (two layers of fabric with a glue layer in between for bonding) compounded with an outer layer of black woven fabric.

[0006] 3. In the era of electric vehicles, the sunroof area on the roof is getting larger and larger, becoming a panoramic sunroof with an area of more than 1 square meter, and the function and structure of the electric sunshade curtain below it are becoming more and more complex. It needs to bear the functions of full-shading, sound insulation, noise reduction, and heat insulation, so it is generally composed of a five-in-one composite structure of a black woven sunshade layer on the back, a TPU elastic film layer in the middle, an interior decorative fabric, and two layers of PUR hot melt glue for bonding the two fabrics on the inner and outer sides of the TPU film.

[0007] Sunlight from the remote sky through the sunroof glass to the car, the temperature rises and makes passengers difficult to endure in hot summer, the way is only the way of solar radiation into the car is absorbed and converted into heat to make the ambient temperature rise. Sunlight is different frequency and wavelength of electromagnetic wave with different energy density. The energy is roughly distributed as follows: visible light energy accounts for about 44%, infrared energy accounts for about 53%, and ultraviolet energy accounts for about 3%. The energy distribution of sunlight in different regions and seasons may be slightly different. Most of the ultraviolet light is absorbed and reflected back to the outside space by the sunroof glass, therefore, the sunlight that radiates to the car interior space through the sunroof glass to convert into heat to heat the passenger compartment is basically visible light and infrared light. That is, the energy of visible light and infrared light that passes through the sunroof glass can be greatly improved by absorbing reflection and reverse infrared radiation out of the sunroof glass to improve the hot environment of the passenger compartment, reduce the power consumption of the air conditioner, reduce the load of the power battery, and increase the cruising range of the electric vehicle.

[0008] Now the car with panoramic sunroof, a small part of the configuration is not configured with electrically retractable roller blind, the summer sunlight heat radiation is obvious, the air conditioning load is large. In addition, most of the configuration is the traditional five-in-one composite roller blind, and a small number of high-end cars begin to configure the five-in-one roller blind with full shading effect. When the two kinds of five-in-one composite roller blind can only block part of the solar energy outside the passenger compartment, the air conditioning load is still relatively large, and there is no active radiation cooling function. With the increasing popularity of electric vehicles and the increasing pursuit of comfort, environmental protection and energy saving concept by car owners, it is more and more necessary to develop a new functional composite roller blind structure with efficient active radiation cooling and its product. SUMMARY

[0009] In view of the shortcomings of the prior art, the present application provides a car sunroof full-shading roller blind composite fabric with nine functional layer structures. This woven fabric with radiation cooling function and its nine-layer functional layer composite fabric has the ability to absorb and reflect the sunlight heat that passes through the sunroof glass of the car and radiate it back to the atmosphere or even outer space through the sunroof glass. At the same time, the aluminized layer under the film can reduce the loss of cold energy in the passenger compartment. Through the absorption, reflection and infrared radiation, the nine-layer composite sunroof roller blind fabric for cars realizes the functions of cooling, heat insulation, cold preservation, shading, beautification and decoration.

[0010] To achieve the above object, the present application is realized by the following technical scheme:

[0011] The application discloses a car sunroof full-shading curtain composite fabric with a nine-function layer structure, which comprises, from top to bottom, a graphene far-infrared emission yarn layer, a connecting yarn layer, a rare earth far-infrared absorption heating yarn layer, a first PUR connecting point layer, a first aluminized heat reflection layer, a film layer, a second aluminized heat reflection layer, a second PUR connecting point layer and an interior fabric layer; the graphene far-infrared emission yarn layer and the rare earth far-infrared absorption heating yarn layer are connected by the connecting yarn layer to form a full-width weft-in-laid warp-knitted radiation cooling fabric layer.

[0012] Preferably, the full-width weft-in-laid warp-knitted radiation cooling fabric layer is a three-layer structure composite organization which is fixed by a fine denier polyester filament knitted loop connecting yarn layer with two upper and lower and vertical arranged functional layers, wherein the weft-in-laid warp-knitted radiation cooling fabric layer is a full-width weft-in-laid warp-knitted radiation cooling fabric layer with the rare earth polyester filament as the warp yarn layer and the graphene polyester filament as the weft yarn layer.

[0013] Preferably, the composite organization and yarns are selected as follows:

[0014] GB1: 211 / 011 full run; polyester filament; GB2: 000 / 000 full run; rare earth polyester yarn; GB3: 000 / 000 full run; rare earth polyester yarn; full-width weft-in-laid yarn: graphene polyester yarn.

[0015] Preferably, the rare earth polyester filament is a polyester filament with the content of lanthanide series rare earth inorganic compound micro-nano powder being greater than 1.0% and the function of absorbing infrared rays and visible light and converting light energy into heat energy; the filament form of the rare earth polyester filament is a fully drawn polyester filament (FDY) or a draw textured yarn (DTY); when the rare earth polyester filament is the DTY, the specification range is 50D-150D and the multi-filament F number is in the range of 36F-72F.

[0016] Preferably, the graphene polyester filament contains 0.1%-0.3% of graphene and the filament form of the graphene polyester filament is a fully drawn polyester filament (FDY) or a draw textured yarn (DTY); when the graphene polyester filament is the DTY, the specification range is 75D-300D and the multi-filament F number is in the range of 48F-144F.

[0017] Preferably, the full-width weft-in-laid warp-knitted radiation cooling fabric layer is knitted on a three-comb full-width weft-in-laid warp knitting machine, the gauge range of the machine is E24-E32, the on-machine weft density range is 15-30 per cm, the thickness of the finished product after setting is 0.18-0.22 mm, and the square gram weight range is 60-100 g / m 2 The content of the graphene polyester filament is 50-60%, the content of the rare earth polyester filament is 20-25%, and the content of the common polyester yarn is 15-25%.

[0018] Preferably, the first PUR connecting point layer and the second PUR connecting point layer are both point PUR glue hot melt coating layers, and the glue point density ranges from 80 to 250 points per square centimeter, and the coating amount ranges from 8 to 20 grams per square centimeter when single-sidedly compounding.

[0019] Preferably, the first aluminized heat-reflecting layer, the film layer and the second aluminized heat-reflecting layer together form a double-side aluminized TPU elastic film layer, the grammage of which ranges from 20 to 40 grams per square meter, and the thickness ranges from 0.018 to 0.035 mm; and the first aluminized heat-reflecting layer and the second aluminized heat-reflecting layer are magnetron sputtering coated onto the film layer.

[0020] Preferably, the inner surface fabric layer is any one of a knitted automotive interior surface fabric, a woven automotive interior surface fabric, a non-woven microfiber automotive interior surface fabric, and a leather-like automotive interior surface fabric.

[0021] The present application provides a kind of automobile sunroof full shading roller blind composite fabric with nine functional layer structure, compared with prior art, the advantages are as follows:

[0022] The present application selects infrared radiation to heat up fast and radiate infrared rays outward, and the material graphene is used as the main infrared emission material. Graphene is a planar structure composed of six carbon atoms. When heat is transmitted on the plane, the thermal resistance is small, the heat transfer is fast, and the ability to radiate infrared rays outward is very strong. This "fast heat transfer-heat absorption heating-high infrared radiation cooling" synergistic mechanism is unmatched by other materials with infrared absorption and emission functions. The graphene content in the graphene polyester-based filament weft yarn ranges from 0.1 to 0.3%, which has obvious infrared emission and balanced effects on spinning and weaving quality control, and price advantage.

[0023] Single-layer graphene has poor visible light absorption, and about 43% of the visible light in sunlight needs other high-efficiency materials to reflect, absorb and convert. The polyester fiber containing rare earth compounds can absorb and convert the incident visible light and infrared light into heat to warm the fabric. The principle is as follows: rare earth elements (such as lanthanum and cerium) have a unique electronic layer structure, and their unfilled 4f electron layer can produce resonance absorption with the incident infrared light to convert it into heat to warm the fabric. Rare earth elements can absorb visible light and near-infrared light (400 nm-2.5 μm) of the sun and convert the light energy into heat energy through their crystal structure to store and warm up. Under light conditions, the rare earth fiber can quickly warm up and transfer heat to the graphene microsheet layer in the graphene fiber to more efficiently radiate the incident solar energy in the form of infrared light through the sunroof glass to the sky outside the car, thereby achieving passive automatic radiation cooling and reducing the load of the air conditioner in the car in summer. The rare earth polyester warp is a lanthanide-based rare earth inorganic compound micro-nano powder with a content of more than 1.0% that can absorb infrared light and visible light, convert light energy into heat energy, and warm up the polyester-based filament.

[0024] The most efficient weave structure for fabrics composed of the two different functional fibers is with the graphene fiber layer facing the skylight glass surface and the rare earth fiber layer distributed in the lower layer. This distribution effect can be achieved through fabric structure design. The full-width warp-weft-weft-weft-weft-weft-knitted composite weave possesses the structural stability, high smoothness, and strong tensile strength of woven fabrics. Furthermore, the warp and weft layers are layered vertically at 90°, connected by loops in a two-needle warp-knitted structure, making it a suitable top layer fabric for skylight composite fabrics. It features a layered arrangement of functional fibers and a balance between fabric softness, surface smoothness, and surface abrasion resistance.

[0025] However, due to the presence of pores between fibers, even this type of fabric with functionally layered structures cannot completely absorb incident sunlight, and the reflected infrared radiation cannot only radiate outwards towards the sunroof glass. If this light continues to radiate into the vehicle, the passenger compartment will still need to be heated, resulting in a relatively high load on the vehicle's air conditioning system in summer. This necessitates functional optimization of the membrane layers in traditional five-in-one roller blind composite fabrics.

[0026] Traditional TPU flexible films or higher-temperature resistant polyester films have good light transmittance but weak blocking ability for visible and infrared light. Therefore, depositing an aluminum film layer on both the top and bottom surfaces of the film using magnetron sputtering can provide better light blocking and reflective capabilities for infrared and visible light. This aluminum film reflects electromagnetic waves such as visible and infrared light that strike the surface back, where they are further absorbed and reflected back by the upper rare-earth graphene fabric layer, or reflected directly through the fiber gaps. Although this reflective aluminum layer on the TPU or polyester film is very thin, it is very effective in reducing solar radiation entering the vehicle interior in summer. It also has excellent heat transfer characteristics, allowing it to more quickly transfer heat collected by the lower film to the upper rare-earth fabric layer and the graphene layer above it. The graphene layer heats up and receives energy, which is then converted into infrared energy emitted by the graphene, thus enhancing the radiative cooling effect. When the temperature inside the passenger cabin is lower than the temperature of the upper surface of the composite roller blind fabric, the aluminum-plated layer under the membrane can also prevent cold air from being transferred to the outside of the skylight, further playing a role in heat insulation and light blocking.

[0027] With these rationally distributed and synergistically working functional layers, they are then laminated together with the inner automotive interior fabric. The resulting nine-in-one composite roller blind fabric structure is like... Figure 1 As shown. For electric vehicles that are sensitive to range anxiety and energy consumption, this new composite structure of electric roller blind fabric offers superior air conditioning energy efficiency and summer cabin comfort. Attached Figure Description

[0028] Figure 1The schematic diagram of the automobile sunroof full-shading roller blind composite fabric of the nine functional layer structure of the present application;

[0029] Figure 2 The schematic diagram of the heat insulation test box for detection in the embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme in the embodiment of the present application is described clearly and completely in combination with the embodiment of the present application. Obviously, the described embodiment is a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiment in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0031] EMBODIMENT

[0032] The automobile sunroof full-shading roller blind composite fabric of the nine functional layer structure:

[0033] From top to bottom, they are: graphene far-infrared emission yarn layer, connecting yarn layer, rare earth far-infrared absorption heating yarn layer, first PUR connecting point layer, first aluminized heat reflection layer, film layer, second aluminized heat reflection layer, second PUR connecting point layer, interior fabric layer;

[0034] The graphene far-infrared emission yarn layer and the rare earth far-infrared absorption heating yarn layer form a full-width weft-in-weft warp-knitted radiative cooling fabric layer through the connecting yarn layer;

[0035] The first aluminized heat reflection layer, the film layer and the second aluminized heat reflection layer form a double-sided aluminized TPU elastic film layer;

[0036] The polyester-based lanthanide rare earth DTY 75D / 48F filament produced by Baotou Rare Earth Research Institute is selected as the warp yarn in the full-width weft-in-weft warp-knitted radiative cooling fabric layer; the polyester semi-dull FDY 30D / 24F AAA grade yarn is selected as the connecting yarn layer; the polyester-based graphene yarn DTY 150D / 72F (Jiangshan Red polyester-based graphene gray DTY 75D / 48F) of Jiangsu Jiangshan Red Special Chemical Fiber Company is selected as the weft yarn of the fabric layer;

[0037] In order to compare the differences in infrared heating and natural cooling speed between the above two functional yarns (polyester-based graphene yarn DTY 150D / 72F and polyester-based lanthanide rare earth DTY 75D / 48F filament) and common polyester and nylon yarns, the following test is made to verify the functional yarns:

[0038] A, Baotou rare earth polyester-based light green gray DTY 75D / 48F (polyester-based lanthanide rare earth DTY 75D / 48F filament);

[0039] B, Jiangshan red graphene polyester DTY 75D / 48F;

[0040] C, Shenghong chemical fiber polyester DTY 75D / 48F;

[0041] D, nylon 6 DTY 70D / 24F;

[0042] The above four kinds of yarns are all made into a total fineness of 30000D (75D specification 400 turns, 70D specification 428 turns), the yarns are folded twice after being twisted, and then put into 100-degree boiling water for 3 minutes to shrink and swell, and then dried in an 80-degree oven, cooled to room temperature, and then tested for temperature rising and natural cooling data under a 250-watt far infrared heating lamp at a distance of 15 cm, as shown in Table 1: (tested by a handheld infrared non-contact temperature gun)

[0043] Table 1

[0044]

[0045] From the above yarn infrared heating temperature rising and natural cooling data, rare earth and graphene yarns both have good infrared heating temperature rising performance, which is related to their infrared absorption characteristics, especially the graphene yarn rises faster under the condition of energy supply, which may be related to the fast heat transfer performance of graphene. Similarly, after removing the heater, the rare earth and graphene yarns both have fast cooling speed under the condition of natural cooling, which is related to their infrared radiation energy consumption and cooling characteristics at high temperature, especially the graphene yarn has faster cooling speed at high temperature, which may be related to the higher infrared emissivity of graphene and the higher heat transfer efficiency of graphene surface.

[0046] Therefore, it is reasonable to select rare earth polyester-based filaments for the upper full-width weft-inserted warp-knitted heat-absorbing and heat-generating warp yarns of the composite roller shutter, and it is also reasonable to select graphene polyester-based filaments for the upper full-width weft-inserted warp-knitted anti-radiation cooling weft yarns of the composite roller shutter.

[0047] 1. Preparation of full-width weft-inserted warp-knitted radiation cooling fabric layer:

[0048] The loom selects a full-width weft-inserted RS warp knitting machine with E24 gauge, and opens three widths of 173.25 inches on the machine: 146.756 cm x 3 widths = 173.34 inches, the finished product width is 130 cm, and the dyeing and finishing product rate is 94.1%.

[0049] GB1: 211 / 011 full wear; semi-light PES FDY 30D / 24F

[0050] GB2: 000 / 000 full wear; Baogang rare earth research institute rare earth polyester light green gray DTY 75D / 48F

[0051] GB3: 000 / 000 Full wear; Baosteel rare earth research institute rare earth polyester light green gray DTY 75D / 48F

[0052] Weft: Jiangshan red graphite polyester light net S twist medium gray DTY 150D / 72F

[0053] Warp density on the machine: 24.75duit, speed 650rpm

[0054] Finishing process:

[0055] ST pre-shrinkage-high temperature setting 180 degrees-lining compound machine calendering (170°x3.5kg pressurex18 seconds)---compounding (note that the lining warp rare earth yarn surface and the aluminized layer on the film surface are compounded)

[0056] ST process: oven temperature 135-140°, speed 8-10m / min, pre-shrinkage 1:-6.5%, pre-shrinkage 2:-2.3%, width 125-127cm. Boiler oil temperature 280℃.

[0057] No.3 setting machine process: v=38m / min, oven temperature: 150°+160°+170°+5x180°, width 131.5cm, warp and weft density: 10.6x26root / cm.

[0058] Flat plate pressing process:

[0059] Large bonding machine, v=5-6m / min. Temperature 170°x 4.2kg / cm 2 . Width 129-130cm, cloth thickness 0.205mm

[0060] Dyeing and finishing yield 94.1%, finished product width 130cm, its theoretical square gram weight is: 88.75g / m 2 ;

[0061] Graphene yarn content: 55.8%, rare earth fiber content: 21.2%. Ordinary polyester yarn content: 23%.

[0062] Warp and weft density after setting: 10.7x26.3root / cm. Thickness: 0.205m. Warp and weft direction 140℃x15 seconds heat shrinkage not more than 2%, infrared emissivity 0.93.

[0063] 2, Preparation of double-sided aluminized TPU elastic film layer

[0064] The upper surface of 35g / m 2 of TPU film is plated with a layer of 50nm thick reflective aluminum layer by magnetron sputtering process.

[0065] 3, First PUR connecting point layer compounding process

[0066] The uppermost rare earth graphene radiation cooling three-function layer fabric's backing surface (rare earth backing yarn distribution surface) is compounded with one side of the double-sided aluminum-plated TPU film using a coating engraved roller with a density of 800-1200 points per square inch (1200 points per square inch are selected in this embodiment) on a PUR compound machine, and the PUR glue amount is 15±1 g / m 2 The compound roll is sealed and placed in a curing room for curing for 48 hours, and then the next side is compounded.

[0067] Lower automobile interior fabric and the other side of the double-sided aluminum-plated TPU film are compounded

[0068] Selection of interior fabric: a gray warp-knitted fabric with a weight of 145 g / m2 and a thickness of 0.45 mm is selected as the interior fabric.

[0069] Second PUR connecting point layer compounding process

[0070] The back of the lowest customer-selected warp-knitted fabric is compounded with the other side of the double-sided aluminum-plated film that has not been compounded using a coating engraved roller with a density of 800-1200 points per square inch (1200 points per square inch are selected in this embodiment) on a PUR compound machine, and the PUR glue amount is 15±1 g / m 2 The compound roll is sealed and placed in a curing room for curing for 48 hours, and then the next pre-shrinking and stable shape size process is performed.

[0071] 4. Pre-shrinking and flat pressing

[0072] The nine-function layer structure of the automobile sunroof full-shading roller blind compound fabric after two compounding processes may have residual internal stress such as stretching in the foregoing processing process, and needs to be pre-shrunk and stable in size and shape by a flat pressing machine under the conditions of 140 degrees x 20 seconds and 0.5 kg / cm 2 This is beneficial to reducing deformation of the roller blind after loading and making the use more reliable.

[0073] 5. The compound fabric after pre-shrinking and flat pressing can be cut into pieces, appearance detected, and sampled for internal quality index detection, and after inspection, it is shipped to the sunroof accessory factory for precise cutting and then assembled into a roller blind.

[0074] 6. Key performance indicators of the sample in this embodiment

[0075] 300±4 g / m 2 , warp and weft heat shrinkage ≤1%, thickness 0.70±0.01 mm, shading rate ≥99.5%, infrared emissivity ≥0.94, and other physical property indicators meet the requirements of the main factory.

[0076] Comparative example:

[0077] 1 / 4 twill 75D black woven fabric composite TPU transparent film and five-in-one composite roller shutter fabric of warp-knitted interior fabric

[0078] 1. The upper layer 1 / 4 twill black light-shielding woven fabric base fabric process

[0079] 1.1. Fabric weaving process:

[0080] Water jet loom 230 type, 1 / 4 standard twill weave, both warp and weft yarn raw materials are polyester raw liquid spinning black filament DTY 75D / 48F from Shenghong Chemical Fiber Co., Ltd., fabric on-machine width is 202 cm, on-machine warp and weft density is 46x38 roots / cm.

[0081] 1.2. Fabric finishing process and results are as follows:

[0082] Fabric - overflow refining cleaning pre-shrinking bulking - setting - fabric inspection and winding - compounding

[0083] Key quality control parameters of finishing:

[0084] Finished product width after setting: 178 cm; finished product square gram weight 86±1 g / m 2 , finished product warp and weft density: 52.2x41 roots / cm; warp and weft direction 140℃x15 seconds heat shrinkage not more than 2%. Infrared emissivity 0.81, light shielding rate ≥83%.

[0085] 2. TPU black film and its compounding process with the upper black light-absorbing woven fabric

[0086] 2.1. The TPU black film is a function of adding black carbon powder in the film to absorb light and heat, and transferring the heat of the film body to the upper and lower layers of fabric to dissipate. The thickness of this black TPU film is 0.02 mm, the square gram weight is 37 grams, and it has good elasticity, light shielding and anti-penetration performance and durability.

[0087] 2.2. First PUR hot melt point adhesive layer compounding process

[0088] In the PUR compounding machine, use the 800-1200 points / square inch (this embodiment selects 1200 point dense gluing roller) density of coating engraved roller to compound the warp face of the uppermost layer of black light-absorbing 1 / 4 twill woven fabric with one face of TPU black film using PUR hot melt adhesive, the coating PUR glue amount is in the range of 12±1 g / m 2 , after compounding into a roll, seal the roll and put it into a curing room for 48 hours, and then compound the next face.

[0089] 3. Lower layer of automobile interior fabric and another face of TPU black film compounding process

[0090] 3.1, Selection of interior fabric

[0091] The inner layer of the interior fabric is selected as a gray warp-knitted fabric with a weight of 145 g / m2and a thickness of 0.45 mm.

[0092] 3, Second PUR hot melt point glue layer composite process

[0093] The second composite surface of the back of the lowest customer-selected warp-knitted fabric and the TPU black film is compounded together using a coating engraved roller with a density of 800-1200 points per square inch (1200 points per square inch are selected in this embodiment) and a PUR hot melt adhesive on a PUR compound machine. The amount of PUR glue is 10±1 g / m2in the coating range, and the compound roll is sealed and placed in a curing room for 48 hours, and then the next process of pre-shrinking and stabilizing the size is performed. 2

[0094] 4, Pre-shrinking and flat pressing

[0095] The five-in-one standard heat-shielding and light-shielding composite roll screen fabric after two compounding processes may have residual internal stress such as stretching in the foregoing processing process, and needs to be pre-shrunk and stress-stabilized by a flat press with a temperature of 140 degrees C, a time of 20 seconds, and a pressure of 0.5 kg / cm2. 2 This process is beneficial to reducing the deformation of the roll screen after installation and making the use more reliable.

[0096] 5, The composite fabric after pre-shrinking and flat pressing can be cut, appearance detected, and sampled for internal quality index detection, etc. After inspection and qualification, it is shipped to the sunroof accessory factory for precise cutting and roll screen assembly.

[0097] 6, Key performance indicators of the sample in this embodiment

[0098] Square weight: 290±3 g / m2 2 , warp and weft shrinkage ≤1%, thickness 0.68±0.01 mm, light shielding rate ≥98%, infrared emissivity ≥0.85, and other physical property indicators meet the requirements of the main machine factory.

[0099] Detection:

[0100] Effect test data comparison and analysis:

[0101] In order to compare the glass sunroof temperature rise of the composite roll screen fabric prepared in the above embodiments and comparative examples and the roll screen fabric without composite, the summer direct sunlight heating condition is simulated. The yarn heating infrared heater is used for irradiation and heating, and part of the test method is referred to the national standard GB / T 41560-2022. The heat insulation test box body is assembled by a foam heat insulation box and glass. The composite roll screen fabric is tested, and the temperature is measured by a thermocouple at a certain distance below. The head temperature of a person in the car is simulated, and the thermocouple temperature is recorded after 30 minutes of irradiation. The schematic diagram of the heat insulation test box body is as follows:​Figure 2 The specific results are shown in Tables 2 and 3 below:

[0102] Table 2

[0103]

[0104] Table 3 Comparative data tested according to national standard GB / T 41560-2022

[0105]

[0106] Analysis of the data in the above two tables: From the comparison and analysis of the space temperature rise in the simulated passenger cabin and the data tested according to the national standard method, it can be seen that the composite fabric of the embodiment has obvious heat insulation, light shielding and radiation cooling effect, which is obviously better than the conventional five-in-one black twill woven composite roller blind fabric of the same specification, and far superior to the effect of the Tesla without electric roller blind direct exposure.

[0107] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A composite fabric for an automotive sunroof full-sunshade roller blind having a nine functional layer structure, characterized in that: The nine functional layer structure is arranged from top to bottom as follows: a graphene far-infrared emission yarn layer, a connecting yarn layer, a rare earth far-infrared absorption heating yarn layer, a first PUR connecting point layer, a first aluminized heat reflection layer, a film layer, a second aluminized heat reflection layer, a second PUR connecting point layer, and an interior fabric layer. The graphene far-infrared emission yarn layer and the rare earth far-infrared absorption heating yarn layer are connected by the connecting yarn layer to form a full-width weft-in-weft warp-knitted radiation cooling fabric layer. 2.The automobile sunroof full-sunshade roller blind composite fabric according to claim 1, characterized in that: The full-width weft-in-weft warp-knitted radiation cooling fabric layer is a three-layer structure composite organization in which a rare earth polyester filament containing a rare earth metal inorganic compound powder is used as a weft layer, a graphene polyester filament is used as a full-width weft layer, and the two upper and lower and vertically arranged functional layers are fixed by a fine denier polyester filament knitted loop as a connecting yarn layer.

3. The automotive sunroof full black-out roller shade composite fabric according to claim 2, wherein, The composite organization and yarns are selected as follows: GB1: 211 / 011 full coverage; polyester filament; GB2: 000 / 000 full coverage; rare earth polyester yarn; GB3: 000 / 000 full coverage; rare earth polyester yarn; Full-width weft yarn: graphene polyester yarn.

4. The automotive sunroof full black-out roller shade composite fabric of claim 2, wherein: The rare earth polyester filament is a polyester-based filament having an absorption of infrared rays and visible light and converting light energy into heat energy, and the content of lanthanide series rare earth inorganic compound micro-nano powder in the filament is greater than 1.0%. The filament form is a fully drawn yarn (FDY) or a draw textured yarn (DTY). When the rare earth polyester filament is a DTY, the specification range is 50D-150D, and the multi-filament F number is in the range of 36F-72F. 5.The automotive sunroof full black-out roller shade composite fabric of claim 2, wherein: The graphene polyester filament contains 0.1%-0.3% graphene, and the filament form is a fully drawn yarn (FDY) or a draw textured yarn (DTY). When the graphene polyester filament is a DTY, the specification range is 75D-300D, and the multi-filament F number is in the range of 48F-144F.

6. The automotive sunroof full black-out roller shade composite fabric according to claim 2, wherein: The full-width weft-inserted warp-knitted radiative cooling fabric layer is knitted on a full-width weft-inserted warp-knitted machine with a range of E24-E32, and the on-machine weft density ranges from 15 to 30 per cm; the thickness of the finished product after setting ranges from 0.18 to 0.22 mm, and the square gram weight ranges from 60 to 100 g / m 2 The content of graphene polyester filaments is 50-60%, the content of rare earth polyester filaments is 20-25%, and the content of ordinary polyester yarns is 15-25%.

7. The automotive sunroof full black-out roller shade composite fabric of claim 1, wherein: The first and second PUR connecting point layers are both point-shaped PUR hot melt coating layers, and the glue point density range is 80-250 points per square centimeter, and the coating amount range is 8-20 grams per square centimeter when single-sided compounding. 8.The automotive sunroof full black-out roller shade composite fabric of claim 1, wherein: The first aluminized heat reflection layer, the film layer, and the second aluminized heat reflection layer together form a double-sided aluminized TPU elastic film layer, and the grammage range is 20-40 grams per square meter, and the thickness is 0.018-0.035 mm. The first aluminized heat reflection layer and the second aluminized heat reflection layer are combined to the film layer by magnetron sputtering. 9.The automotive sunroof full black-out roller shade composite fabric of claim 1, wherein: The interior fabric layer is any one of a knitted automobile interior fabric, a woven automobile interior fabric, a non-woven microfiber leather fabric for vehicles, and a leather-like automobile interior fabric.

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