A suede fabric canopy, its preparation method and application

Abstract

This invention provides a suede fabric canopy, its preparation method, and its application. The preparation method first involves rolling adhesive onto PU foam and suede fabric separately. Then, spunlace nonwoven fabric, a first glass fiber mat, the rolled PU foam, a second glass fiber mat, and PE nonwoven fabric are sequentially laid and pressed to obtain a substrate. Finally, the surface of the spunlace nonwoven fabric in the obtained substrate is bonded to the rolled suede fabric, and then waterjet cut and edge-wrapped to obtain the suede fabric canopy. The preparation method uses a combination of spunlace nonwoven fabric, glass fiber mat, and PU foam to form the substrate, and combines it with nonwoven suede fabric through pressing and bonding processes. This results in a suede fabric canopy with excellent water resistance, chemical resistance, and abrasion resistance, as well as high color fastness to rubbing, full and delicate pile, a soft and smooth feel, bright color, and uniform texture.

Description

Technical Field

[0001] This invention belongs to the field of suede fabric technology, specifically relating to a suede fabric canopy, its preparation method, and its application. Background Technology

[0002] Suede is an animal skin characterized by its tight fiber structure and fine, soft nap. It is a high-end leather material used in high-end clothing and luxury brand bags. In recent years, suede has begun to be used in automotive interiors, including seats, backrests, steering wheels, dashboards, door panels, and headliners, and there is a large market demand for it.

[0003] Natural suede shrinks and hardens easily when wet, is susceptible to insect infestation, and is difficult to sew. To meet current consumer demand, textile manufacturers have developed alternatives such as imitation suede. The production methods for domestically made imitation suede can be broadly categorized into three types: machine-woven, knitted, and non-woven fabric methods. For example, CN112080841A discloses a method for preparing imitation suede fabric for automotive headliners. This method involves circular knitting of a greige fabric using conventional monofilament yarns, followed by pre-setting, dyeing, imitation suede drying, napping, and imitation suede setting steps. This produces a lightweight imitation suede fabric suitable for automotive headliners, comprising a fabric layer and a support layer, with a weight of 190–225 g / m². 2 Made directly from conventional polyester yarn, this fabric eliminates the need for strong alkali or acid treatment during dyeing, reducing production complexity and environmental pollution. Furthermore, the monofilament polyester yarn is slightly thicker than alkali-treated yarn, minimizing processing steps. The supporting layer yarn forms the main body of the finished fabric, ensuring its strength. This invention also provides a lightweight suede-like fabric with good flame retardancy, high tensile strength and shrinkage elasticity, abrasion resistance, and strong lightfastness.

[0004] However, most of the suede car headliners prepared by the existing technologies, including the invention mentioned above, suffer from problems such as low color fastness to rubbing, poor water resistance, and poor resistance to chemical reagents.

[0005] Therefore, in order to address the above problems, there is an urgent need to develop a method for preparing suede fabric canopies with high rubbing color fastness, excellent water stain resistance, and chemical reagent resistance. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a suede fabric canopy, its preparation method and application. The suede fabric canopy prepared by the method has high rubbing color fastness, excellent water stain resistance, chemical reagent resistance and wear resistance that cannot be matched by genuine leather, and has full and delicate pile, soft and smooth feel, bright color and uniform texture.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a method for preparing a suede fabric canopy, the method comprising the following steps:

[0009] (1) Roll glue is applied to PU foam to obtain rolled PU foam; roll glue is applied to suede fabric to obtain rolled suede fabric.

[0010] (2) The spunlace nonwoven fabric, the first glass fiber mat, the PU foam after rolling, the second glass fiber mat and the PE nonwoven fabric are laid out in sequence and pressed into shape to obtain the substrate;

[0011] (3) The suede fabric after being rolled with glue is bonded to one side of the spunlace nonwoven fabric in the substrate, and then cut and edged with a water jet to obtain the suede fabric canopy.

[0012] The method for preparing a suede fabric canopy provided by this invention first involves PU roller bonding and suede fabric roller bonding. Then, spunlace nonwoven fabric, a first glass fiber mat, roller-bonded PU foam, a second glass fiber mat, and PE nonwoven fabric are sequentially laid and pressed into a substrate. Finally, the roller-bonded suede fabric is bonded to one side of the spunlace nonwoven fabric in the obtained substrate. After waterjet cutting and edge binding, the suede fabric canopy is obtained. The preparation method uses spunlace nonwoven fabric, glass fiber mat, and PU foam to form a substrate, combined with pressing and bonding processes, so that the final suede fabric canopy has high rubbing color fastness, excellent wear resistance, chemical resistance, and water stain resistance. It also has full and delicate pile, a soft and smooth feel, bright color, uniform texture, and excellent overall performance.

[0013] Preferably, step (1) involves applying the PU foam to a roll glue machine, which is used to apply the roll glue to both sides of the PU foam.

[0014] Preferably, the rotation speed of the roller is 25 to 30 r / min, for example 25 r / min, 26 r / min, 27 r / min, 28 r / min, 29 r / min or 30 r / min, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0015] Preferably, the distance between the upper and lower rollers of the roller glue machine is 7 to 7.5 mm, for example 7 mm, 7.1 mm, 7.2 mm, 7.3 mm, 7.4 mm or 7.5 mm, and specific point values ​​between the above point values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific point values ​​included in the range.

[0016] Preferably, the amount of glue applied to the upper roller of the glue roller machine is 70-90 g / m. 2 For example, 70g / m 2 72g / m 2 76g / m 2 78g / m 2 80g / m 2 84g / m 2 Or 88g / m 2 As well as the specific point values ​​between the above point values, due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific point values ​​included in the range.

[0017] Preferably, the amount of glue applied to the lower roller of the gluing machine is 110-130 g / m. 2 For example, 110g / m 2 112g / m 2 116g / m 2 118g / m 2 120g / m 2 124g / m 2 Or 128g / m 2 As well as the specific point values ​​between the above point values, due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific point values ​​included in the range.

[0018] Preferably, in step (1), the suede fabric is coated with glue using a glue roller. The glue roller is used to coat the non-suede side of the suede fabric, which facilitates subsequent bonding with the substrate.

[0019] Preferably, the roller spacing of the mixing roller is 2.5 to 3 mm, for example 2.5 mm, 2.55 mm, 2.6 mm, 2.65 mm, 2.7 mm, 2.75 mm, 2.8 mm, 2.8 mm, 2.9 mm, 2.95 mm or 3 mm, and specific values ​​between the above values ​​are not exhaustively listed in this invention due to space limitations and for the sake of brevity.

[0020] Preferably, the amount of adhesive applied by the roller is 16–21 g / m. 2 For example, 16g / m 2 17g / m 2 18g / m 2 19g / m 2 20g / m 2 Or 21g / m 2 As well as the specific point values ​​between the above point values, due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific point values ​​included in the range.

[0021] Preferably, the upper mold temperature and lower mold temperature of the mold used for pressing in step (2) are each independently 120-135°C, for example 120°C, 122°C, 124°C, 126°C, 128°C, 130°C, 132°C or 135°C, as well as specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0022] As a preferred technical solution of the present invention, the upper mold temperature and lower mold temperature of the mold used for compression molding are further defined as 120-135°C. If the upper mold temperature and / or lower mold temperature are higher than 135°C, the surface flatness of the pressed substrate is likely to be low. If the upper mold temperature and / or lower mold temperature are lower than 120°C, the glue reaction is likely to be slow, the compression molding time is long, and the rigidity of the pressed substrate is poor.

[0023] Preferably, the pressing pressure in step (2) is 70–90 kgf / cm². 2 For example, 70 kgf / cm 2 72kgf / cm 2 74 kgf / cm 2 76 kgf / cm 2 78 kgf / cm 2 80kgf / cm 2 82kgf / cm 2 84 kgf / cm 2 86 kgf / cm 2 88kgf / cm 2 Or 90 kgf / cm 2 As well as the specific point values ​​between the above point values, due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific point values ​​included in the range.

[0024] Preferably, the pressing time is 45 to 55 seconds, for example 45 seconds, 47 seconds, 49 seconds, 51 seconds, 53 seconds or 55 seconds, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0025] Preferably, the upper mold temperature of the mold used for bonding in step (3) is 95-105°C, for example 95°C, 96°C, 97°C, 98°C, 99°C, 100°C, 101°C, 102°C, 103°C, 104°C or 105°C, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0026] Preferably, the lower mold temperature of the mold used for bonding in step (3) is 115-125°C, for example 115°C, 117°C, 119°C, 121°C, 123°C or 125°C, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0027] As a preferred embodiment of the present invention, the upper mold temperature of the bonding mold is further defined as 95-105°C and the lower mold temperature as 115-125°C. If the upper mold temperature and / or lower mold temperature of the bonding mold are too high, the surface of the resulting suede fabric canopy may be scalded. If the upper mold temperature and / or lower mold temperature of the bonding mold are too low, the glue reaction time may be long, the bonding time may be long, and the peel strength of the resulting suede fabric canopy may be poor, resulting in weak adhesion.

[0028] Preferably, the bonding pressure in step (3) is 45–60 kgf / cm. 2 For example, 45 kgf / cm 2 47kgf / cm 2 49kgf / cm 2 51 kgf / cm 2 53 kgf / cm 2 55 kgf / cm 2 57 kgf / cm 2 59 kgf / cm 2 Or 60 kgf / cm 2 As well as the specific point values ​​between the above point values, due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific point values ​​included in the range.

[0029] Preferably, the bonding time in step (3) is 35 to 45 seconds, for example, 35 seconds, 37 seconds, 39 seconds, 41 seconds, 43 seconds or 45 seconds, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0030] Preferably, the cutting water pressure of the water jet cutting in step (3) is 40,000 to 50,000 psi, such as 40,000 psi, 42,000 psi, 44,000 psi, 46,000 psi or 50,000 psi, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0031] Preferably, the cutting air pressure of the waterjet cutting in step (3) is 4-6 kg / m³. 2 For example, 4kg / m 2 4.2kg / m2 4.4 kg / m 2 4.6kg / m 2 4.8kg / m 2 5kg / m 2 5.2kg / m 2 5.4kg / m 2 5.6kg / m 2 5.8kg / m 2 Or 6kg / m 2 As well as the specific point values ​​between the above point values, due to space limitations and for the sake of brevity, this invention will not exhaustively list the specific point values ​​included in the range.

[0032] Preferably, the edge-wrapping method in step (3) specifically includes: attaching the skylight frame to the skylight of the suede fabric canopy semi-finished product with glue, and then placing it on a flanging machine to fold the skylight and the front edge. The folding and pressure holding time is 30-40s, for example, 30s, 32s, 34s, 36s, 38s or 40s, and specific point values ​​between the above points. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific point values ​​included in the range.

[0033] Preferably, after the edge binding in step (3) is completed, the steps of accessory installation and final inspection and packing are also included.

[0034] Preferably, the pressure holding time for the accessory installation is 45 to 70 seconds, for example, 45 seconds, 50 seconds, 55 seconds, 60 seconds, 65 seconds, or 70 seconds, as well as specific values ​​between the above values. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific values ​​included in the range.

[0035] Preferably, the opening and closing time of the accessory installation is ≤15s, for example 15s, 13s, 11s, 9s, 7s, 6s, 5s or 4s, and specific values ​​between the above values. Due to space limitations and for the sake of brevity, the present invention will not exhaustively list the specific values ​​included in the range.

[0036] As a preferred embodiment of the present invention, the preparation method specifically includes the following steps:

[0037] (1) Roller gluing: Roller gluing is applied to both sides of the PU foam using a roller gluing machine. The roller speed is 25-30 r / min, the distance between the upper and lower rollers is 7-7.5 mm, and the amount of glue applied to the upper roller is 70-90 g / m. 2 The amount of adhesive applied to the lower roller is 110-130 g / m. 2 The resulting PU foam is obtained after roll bonding.

[0038] The suede fabric is coated with adhesive using rollers. The roller spacing of the mixing rollers is 2.5–3 mm, and the adhesive application rate is 16–21 g / m². 2 The resulting suede fabric is coated with adhesive.

[0039] (2) Substrate molding: The spunlace nonwoven fabric, the first glass fiber mat, the PU foam after roll bonding, the second glass fiber mat, and the PE nonwoven fabric are laid out sequentially and pressed into shape in a mold with an upper mold temperature of 120-135℃ and a lower mold temperature of 120-135℃. The pressing pressure is 70-90 kgf / cm². 2 The substrate is obtained by performing the process for 45–55 seconds.

[0040] (3) Lamination: After the suede fabric with the rolled adhesive is laminated to one side of the spunlace nonwoven fabric in the substrate, it is placed in a mold with an upper mold temperature of 95-105℃ and a lower mold temperature of 115-125℃ for lamination. The lamination pressure is 45-60 kgf / cm. 2 The time is 35-45 seconds to obtain a bonded semi-finished product;

[0041] (4) Waterjet cutting: The semi-finished product is waterjet cut with a water pressure of 40,000–50,000 psi and a cutting air pressure of 4.0–6.0 kg / cm². 2 This yields the cut semi-finished product;

[0042] (5) Edge binding: The skylight frame is glued to the skylight of the suede fabric canopy semi-finished product, and then placed on the edge binding machine to edge the skylight and the front edge. The edge binding and pressure holding time is 30-40 seconds to obtain the edge binding semi-finished product.

[0043] (6) Attachment assembly: The suede fabric canopy is obtained by assembling the attachments with a pressure holding time of 45-70s and an opening and closing time of ≤15s.

[0044] In a second aspect, the present invention provides a suede fabric canopy, which is prepared by the preparation method described in the first aspect.

[0045] Thirdly, the present invention provides an application of a suede fabric headliner obtained by the preparation method described in the first aspect or a suede fabric headliner as described in the second aspect in an automobile.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The method for preparing a suede fabric canopy provided by this invention includes firstly rolling PU foam and suede fabric together, then sequentially laying spunlace nonwoven fabric, a first glass fiber mat, the rolled PU foam, a second glass fiber mat, and a PE nonwoven fabric and pressing them to obtain a substrate. Finally, the surface of the spunlace nonwoven fabric in the obtained substrate is bonded to the rolled suede fabric, and then waterjet cut and edge-wrapped to obtain the suede fabric canopy. The preparation method uses spunlace nonwoven fabric, glass fiber mat, and PU foam to form a substrate, and combines it with nonwoven suede fabric through pressing and bonding processes. This results in a suede fabric canopy with excellent chemical resistance, water resistance, and abrasion resistance, as well as high color fastness to rubbing, full and delicate pile, soft and smooth feel, bright color, and very uniform texture. Detailed Implementation

[0048] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0049] Unless otherwise specified, the materials and equipment involved in the specific embodiments of this invention are all conventional materials in the art and can be purchased commercially.

[0050] In particular, detailed information on some of the raw materials and equipment involved in the following embodiments and comparative examples is shown below:

[0051] (1) PU foam: 3200×1650mm in length×width, 7mm in thickness, purchased from Hebei Rongxiang Insulation Building Materials Co., Ltd.;

[0052] (2) Suede fabric: 3200×1650mm in length×width, 4mm in thickness, purchased from brand MS9PW007;

[0053] (3) Spunlace nonwoven fabric: 3200×1650mm in length×width, 1mm in thickness;

[0054] (4) Fiberglass mat: 3200×1650mm in length×width, 1mm in thickness;

[0055] (5) PE non-woven fabric: 3200×1650mm in length×width, 1mm in thickness;

[0056] (6) Roller gluing machine: model CASATI / 1300, which can glu on both sides, automatically heat and precisely control the amount of glue applied to the upper and lower rollers;

[0057] (7) Roller roller: Model CD74 / XL75 GTO52;

[0058] (8) Rubber roller motor: Model SIMOTICS-1FL6.

[0059] Example 1

[0060] A method for preparing a suede fabric canopy includes the following steps:

[0061] (1) Rolling: A rolling machine is used to roll the laid PU foam. The speed of the rolling machine is 25 revolutions per minute, the distance between the upper and lower rollers is 7mm, and the amount of glue applied to the upper roller is 80g / m. 2 The amount of adhesive applied to the lower roller is 120g / m. 2 The resulting PU foam is obtained after roll bonding.

[0062] The suede fabric is coated with adhesive using rollers, with a roller spacing of 3mm and an adhesive application rate of 20g / m². 2 The resulting suede fabric is coated with adhesive.

[0063] (2) Substrate molding: The spunlace nonwoven fabric, fiberglass mat, PU foam after roll bonding, fiberglass mat, and PE nonwoven fabric are laid out in sequence and placed in a mold with an upper mold temperature of 130℃ and a lower mold temperature of 130℃ for pressing and molding. The pressing pressure is 80 kgf / cm². 2 The time is 50 seconds, and the substrate is obtained;

[0064] (3) Lamination: After the suede fabric with the rolled adhesive is laminated to one side of the spunlace nonwoven fabric in the substrate, it is placed in a mold with an upper mold temperature of 100℃ and a lower mold temperature of 120℃ for lamination. The lamination pressure is 50 kgf / cm. 2 The time is 40 seconds, and a semi-finished product is obtained;

[0065] (4) Waterjet cutting: The semi-finished product is waterjet cut at a water pressure of 45,000 psi and a cutting air pressure of 5 kg / cm². 2 This yields the cut semi-finished product;

[0066] (5) Edge binding: The sunroof frame is glued to the sunroof part of the cut semi-finished product, and then placed on the edge binding machine to be edged the sunroof and the front edge. The edge binding pressure holding time is 35s to obtain the edge binding semi-finished product.

[0067] (6) Attachment assembly: After holding the pressure for 60 seconds and opening and closing for 15 seconds, the attachments are installed to obtain the suede fabric canopy.

[0068] Example 2

[0069] A method for preparing a suede fabric canopy includes the following steps:

[0070] (1) Rolling: A rolling machine is used to roll the laid PU foam. The speed of the rolling machine is 30 revolutions per minute, the distance between the upper and lower rollers is 7.5 mm, and the amount of glue applied to the upper roller is 70 g / m. 2 The amount of adhesive applied to the lower roller is 110g / m. 2 The resulting PU foam is obtained after roll bonding.

[0071] The suede fabric is coated with adhesive using rollers. The roller spacing of the mixing rollers is 2.5mm, and the adhesive application rate is 16g / m². 2 The resulting suede fabric is coated with adhesive.

[0072] (2) Substrate molding: The spunlace nonwoven fabric, fiberglass mat, PU foam after roll bonding, fiberglass mat, and PE nonwoven fabric are laid out in sequence and pressed into shape in a mold with an upper mold temperature of 120℃ and a lower mold temperature of 120℃. The pressing pressure is 90 kgf / cm². 2 The time is 45 seconds, and the substrate is obtained;

[0073] (3) Lamination: After the suede fabric with the rolled adhesive is laminated to the side of the substrate closest to the spunlace nonwoven fabric, it is placed in a mold with an upper mold temperature of 95℃ and a lower mold temperature of 115℃ for lamination. The lamination pressure is 45 kgf / cm². 2 The time is 45 seconds, and a semi-finished product is obtained.

[0074] (4) Waterjet cutting: The semi-finished product is waterjet cut at a water pressure of 50,000 psi and an air pressure of 6 kg / cm². 2 This yields the cut semi-finished product;

[0075] (5) Edge binding: The sunroof frame is glued to the sunroof part of the cut semi-finished product, and then placed on the edge binding machine to be edged the sunroof and the front edge. The edge binding pressure holding time is 40s to obtain the edge binding semi-finished product.

[0076] (6) Attachment assembly: After holding the pressure for 60 seconds and opening and closing for 15 seconds, the attachments are installed to obtain the suede fabric canopy.

[0077] Example 3

[0078] A method for preparing a suede fabric canopy includes the following steps:

[0079] (1) Rolling: A rolling machine is used to roll the laid PU foam. The rolling machine speed is 25 revolutions per minute, the distance between the upper and lower rollers is 7mm, and the amount of glue applied to the upper roller is 90g / m. 2 The amount of adhesive applied to the lower roller is 130g / m. 2 The resulting PU foam is obtained after roll bonding.

[0080] The suede fabric is coated with adhesive using rollers. The roller spacing of the mixing rollers is 3mm, and the adhesive application rate is 19g / m². 2 The resulting suede fabric is coated with adhesive.

[0081] (2) Substrate molding: The spunlace nonwoven fabric, fiberglass mat, PU foam after roll bonding, fiberglass mat, and PE nonwoven fabric are laid out in sequence and pressed into shape in a mold with an upper mold temperature of 135℃ and a lower mold temperature of 135℃. The pressing pressure is 70 kgf / cm². 2 The time is 55 seconds, and the substrate is obtained;

[0082] (3) Lamination: After the suede fabric with the rolled adhesive is laminated to the side of the substrate closest to the spunlace nonwoven fabric, it is placed in a mold with an upper mold temperature of 105℃ and a lower mold temperature of 125℃ for lamination. The lamination pressure is 60 kgf / cm. 2 The time is 35 seconds, and a semi-finished product is obtained;

[0083] (4) Waterjet cutting: The semi-finished product is waterjet cut at a water pressure of 40,000 psi and a cutting air pressure of 4 kg / cm². 2 This yields the cut semi-finished product;

[0084] (5) Edge binding: The sunroof frame is glued to the sunroof part of the cut semi-finished product, and then placed on the edge binding machine to be edged the sunroof and the front edge. The edge binding pressure holding time is 30s to obtain the edge binding semi-finished product.

[0085] (6) Attachment assembly: After holding the pressure for 45 seconds and opening and closing for 10 seconds, the attachment is installed to obtain the suede fabric canopy.

[0086] Example 4

[0087] A method for preparing a suede fabric canopy, which differs from Example 1 in that the upper mold temperature and the lower mold temperature of the mold used for pressing in step (2) substrate molding are 120°C, while the other steps, conditions and parameters are the same as in Example 1.

[0088] Example 5

[0089] A method for preparing a suede fabric canopy, which differs from Example 1 in that the upper mold temperature and the lower mold temperature of the mold used for pressing in step (2) substrate molding are 130°C, while the other steps, conditions and parameters are the same as in Example 1.

[0090] Example 6

[0091] A method for preparing a suede fabric canopy, which differs from Example 1 in that the upper mold temperature of the mold used for bonding in step (3) is 100°C and the lower mold temperature is 120°C, while the other steps, conditions and parameters are the same as in Example 1.

[0092] Example 7

[0093] A method for preparing a suede fabric canopy, which differs from Example 1 in that the upper mold temperature of the mold used for bonding in step (3) is 105°C and the lower mold temperature is 115°C, while the other steps, conditions and parameters are the same as in Example 1.

[0094] Comparative Example 1

[0095] A method for preparing a suede fabric canopy, which differs from Example 1 in that step (2) of substrate molding includes: sequentially laying glass fiber mat, PU foam after roll bonding, glass fiber mat and PE nonwoven fabric, and pressing them in a mold with an upper mold temperature of 135°C and a lower mold temperature of 135°C, with a pressing pressure of 70 kgf / cm². 2 The time was 55 minutes to obtain the substrate. Other steps, conditions and parameters were the same as in Example 1.

[0096] Comparative Example 2

[0097] A method for preparing a suede fabric canopy, which differs from Example 1 in that step (2) of substrate molding includes: sequentially laying spunlace nonwoven fabric, PU foam after roll bonding, glass fiber mat and PE nonwoven fabric, and pressing them in a mold with an upper mold temperature of 135°C and a lower mold temperature of 135°C, with a pressing pressure of 70 kgf / cm². 2 The time was 55 minutes to obtain the substrate; other steps, conditions and parameters were the same as in Example 1.

[0098] Comparative Example 3

[0099] A method for preparing a suede fabric canopy, which differs from Example 1 in that step (2) of substrate molding includes: sequentially laying spunlace nonwoven fabric, glass fiber mat, PU foam after roll bonding, and PE nonwoven fabric, and pressing them in a mold with an upper mold temperature of 135°C and a lower mold temperature of 135°C, with a pressing pressure of 70 kgf / cm². 2 The time was 55 minutes to obtain the substrate; other steps, conditions and parameters were the same as in Example 1.

[0100] Comparative Example 4

[0101] A method for preparing a suede fabric canopy, which differs from Example 1 in that PU foam is used instead of PU foam, while the other steps, conditions and parameters are the same as in Example 1.

[0102] Performance testing:

[0103] (1) Wear resistance: The test was conducted according to the method provided in CVTC 54075, using an H-38 grinding wheel, a load of 500g, and 300 friction cycles.

[0104] (2) Color fastness to rubbing: The test shall be conducted in accordance with the method provided in ISO 105-X12, with 10 dry rubbings and 10 wet rubbings each, and the color fastness grade shall be evaluated in accordance with ISO 105-A03.

[0105] (3) Water stain resistance: The test was conducted according to the method provided in CVTC 52150. A sample of 400×400mm was taken, and distilled water was dripped onto the sample with a dropper. 5mL of water was taken at a time and the test was repeated three times. The sample was dried for at least 24 hours each time and the surface condition of the sample was observed.

[0106] (4) Chemical resistance: The test shall be conducted in accordance with the method specified in 4.3 of O / BYDO-A1901.402.2. The reagents are household detergent, multi-purpose foam cleaner, ethanol, soapy water, sunscreen, hand cream, artificial sweat, orange juice, tea and cola.

[0107] The suede fabric canopies provided in Examples 1-7 and Comparative Examples 1-4 were tested according to the above test methods. The test results are shown in Table 1.

[0108] Table 1

[0109]

[0110]

[0111] According to the data in Table 1:

[0112] (1) The abrasion resistance test results of the suede fabric canopy prepared by the preparation methods provided in Examples 1 to 7 are 6 to 7, the rubbing color fastness test results are 4 to 5, the water stain resistance test shows no water stains and no change in touch, and the chemical reagent resistance test results are 4 to 5. It has excellent abrasion resistance, water stain resistance and chemical reagent resistance, and at the same time, the rubbing color fastness is high.

[0113] (2) The test results of the suede fabric canopy prepared by the preparation methods provided in Comparative Examples 1 to 4 are all low in terms of abrasion resistance, color fastness to rubbing and chemical resistance, and cannot meet the requirements for use.

[0114] The applicant declares that this invention illustrates a suede fabric canopy, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above-described process steps, meaning that this invention does not necessarily rely on the above-described process steps to be implemented. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of the raw materials used in this invention, additions of auxiliary components, and selection of specific methods all fall within the protection and disclosure scope of this invention.

Claims

1. A method for preparing a suede fabric canopy, characterized in that, The preparation method includes the following steps: (1) Roll glue is applied to PU foam to obtain rolled PU foam; roll glue is applied to suede fabric to obtain rolled suede fabric. (2) The spunlace nonwoven fabric, the first glass fiber mat, the PU foam after rolling, the second glass fiber mat and the PE nonwoven fabric are laid out in sequence and pressed into shape to obtain the substrate; (3) The suede fabric after being rolled with glue is bonded to one side of the spunlace nonwoven fabric in the substrate, and then cut and edged with a water jet to obtain the suede fabric canopy. The upper mold temperature of the mold used for pressing and molding is 120~135℃, and the lower mold temperature is 120~135℃. In step (3), the upper mold temperature of the bonding mold is 95~105℃ and the lower mold temperature is 115~125℃. The edge-wrapping method described in step (3) specifically includes: attaching the skylight frame to the skylight of the suede fabric canopy semi-finished product with glue, and then placing it on a flanging machine to fold the skylight and the front edge, with a flanging and pressure holding time of 30~40 s.

2. The preparation method according to claim 1, characterized in that, Step (1) involves rolling PU foam in a rolling machine.

3. The preparation method according to claim 2, characterized in that, The rotation speed of the roller is 25~30 r / min.

4. The preparation method according to claim 2, characterized in that, The distance between the upper and lower rollers of the roller glue machine is 7~7.5mm.

5. The preparation method according to claim 2, characterized in that, The glue application rate of the upper roller of the glue rolling machine is 70~90g / m. 2 .

6. The preparation method according to claim 2, characterized in that, The glue application rate of the lower roller of the glue rolling machine is 110~130 g / m. 2 .

7. The preparation method according to claim 1, characterized in that, Step (1) involves applying glue to the suede fabric using a glue roller.

8. The preparation method according to claim 7, characterized in that, The roller spacing of the rubber roller is 2.5~3 mm.

9. The preparation method according to claim 7, characterized in that, The amount of adhesive applied by the roller is 16~21 g / m. 2 .

10. The preparation method according to claim 1, characterized in that, The pressing pressure in step (2) is 70~90 kgf / cm. 2 .

11. The preparation method according to claim 1, characterized in that, The pressing time in step (2) is 45~55 s.

12. The preparation method according to claim 1, characterized in that, The bonding pressure in step (3) is 45~60 kgf / cm. 2 .

13. The preparation method according to claim 1, characterized in that, The bonding time in step (3) is 35~45 s.

14. The preparation method according to claim 1, characterized in that, The cutting water pressure for the water jet cutting in step (3) is 40,000 to 50,000 psi.

15. The preparation method according to claim 1, characterized in that, The cutting air pressure for waterjet cutting in step (3) is 4~6 kg / m³. 2 .

16. The preparation method according to claim 1, characterized in that, Step (3) after the edge binding is completed, the steps of accessory installation and final inspection and packing are also included.

17. The preparation method according to claim 16, characterized in that, The pressure holding time for the installation of the accessory is 45~70s.

18. The preparation method according to claim 16, characterized in that, The opening and closing time of the accessory installation is ≤15 s.

19. A suede fabric canopy, characterized in that, The suede fabric canopy is prepared using the preparation method described in any one of claims 1 to 18.

20. The application of a suede headliner prepared by any one of claims 1 to 18, or the suede headliner as described in claim 19, in an automobile.

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