Compact short-pile chamois leather fabric and manufacturing method thereof

Abstract

The invention discloses a compact short-pile chamois leather fabric and a manufacturing method thereof, and the manufacturing method comprises the following steps: (1) pre-shaping: after a gray fabric is woven, pre-shaping the gray fabric; (2) primary fuzzing: performing fuzzing treatment on the pre-shaped gray fabric; (3) dyeing: dyeing the gray fabric obtained in the step (2); (4) drying and shaping: carrying out drying and shaping treatment on the dyed fabric; (5) secondary fuzzing: performing secondary fuzzing treatment on the dried and shaped fabric; (6) shaping: shaping the fabric obtained in the step (5) to obtain the compact short-pile chamois leather fabric. The fabric product is fine and smooth in texture and soft and smooth in hand feeling, has a chamois style and is excellent in tensile property.

Description

Technical Field

[0001] This invention belongs to the field of automotive interior materials, specifically relating to a dense short-pile suede fabric and its manufacturing method. Background Technology

[0002] Currently, the domestic automotive market is showing a gradual decline in its acceptance of ordinary fabrics, favoring easier-to-care-for products such as PU and PVC. Therefore, developing differentiated fabrics is one of the main challenges for the future fabric market and a key direction for maintaining competitiveness.

[0003] Currently, suede has entered the automotive interior materials market as a mid-to-high-end material, and major OEMs are already using it in large quantities. However, most imitation suede products on the market are made of non-woven fabric, which suffers from low elasticity and poor tensile strength. When used as seat material, this product is prone to wrinkles at the edges, requiring frequent ironing and resulting in wasted costs and processing time. Due to its poor tensile strength, it is also unsuitable for use as a material for headliners, pillars, etc. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a dense short-pile suede fabric and its manufacturing method. This invention focuses on the selection of yarn and the design of post-processing techniques to create a finished product with a delicate hand feel and good stretchability, thereby gaining consumer acceptance.

[0005] The technical solution of this invention is as follows: A method for manufacturing a dense short-pile suede fabric includes the following steps: (1) Pre-forming: After the fabric is woven, it is pre-formed to prevent excessive shrinkage during subsequent processing; (2) First napping: Nailing treatment is performed on the pre-shaped greige fabric; (3) Dyeing: Dye the greige fabric obtained in step (2); (4) Drying and shaping: The dyed fabric is dried and shaped. (5) Secondary napping: The fabric after drying and setting undergoes a secondary napping process; (6) Shaping: The fabric obtained in step (5) is shaped to obtain the product dense short-pile suede fabric.

[0006] Preferably, in step (1), the outer yarn of the woven fabric is 50D-75D yarn, the bottom yarn is 30D-50D yarn, and the weaving density is 28~36 yarns / inch.

[0007] Preferably, in step (1), a Trico warp knitting machine is used for knitting.

[0008] Preferably, in step (1), the pre-formed temperature is 130℃~150℃ and the speed is 12~18m / min.

[0009] Preferably, in step (2), the napping method is circular napping, the number of napping cycles is 3 to 6, the napping speed is 13 to 15 m / min, and the nap height after napping is 0.8 to 1.0 mm.

[0010] Preferably, in step (3), the dyeing solution used for dyeing contains disperse dye and additives, wherein the additives are at least one of metal chelating agents, dispersants, lightfastness agents, and flame retardants. The dyeing holding temperature is preferably 130°C, and the holding time is preferably 30 minutes. For dyeing dark colors, additional post-treatment is added to improve the rubbing fastness of the finished product.

[0011] Preferably, in step (4), the drying and shaping temperature is 130℃~150℃ and the speed is 12~18m / min.

[0012] Preferably, in step (5), the raising method is circular raising, the number of raising passes is 3, the raising speed is 13~15m / min, and the pile height after raising is 0.8~0.9mm. The fabric after drying and shaping is raised again. The purpose of this process is to enhance the surface feel of the product and achieve the required hand feel and dense short pile style.

[0013] Preferably, in step (6), the shaping temperature is 130℃~150℃ and the speed is 12~18m / min.

[0014] The present invention also provides a dense short-pile suede fabric, which is obtained by the above-described manufacturing method.

[0015] The beneficial effects of this invention are: (1) This invention involves two rounds of napping during processing. The first round of napping is performed before dyeing the product to lay the foundation for the dense short pile style of the finished product. After dyeing, the second round of napping is performed to enhance the nap feel of the product and perfect the dense short pile style of the finished product. The two rounds of napping not only improve the surface of the product, but also further narrow the fabric width during the two rounds of napping, which has a better effect on the stretching of the finished product.

[0016] (2) In the automotive interior market, suede fabrics are mainly non-woven, with low elasticity and poor tensile properties, and are primarily used in the seat area. The product of this invention has a delicate texture, a smooth feel, and a suede-like style. It also boasts excellent tensile properties, making it suitable for injection molding. Its elongation at constant load reaches over 15%, and its Martindale pilling resistance meets or exceeds level 3 after 6000 cycles. The product of this invention possesses excellent tensile and abrasion resistance properties and can be applied to interior surfaces such as door panels, headliners, sun visors, and pillars. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a process flow diagram of the present invention; Figure 2 This is a fabric product image of Example 1; Figure 3 This is a product image of the fabric shown in Comparative Example 1; Figure 4 This is a product image of the fabric shown in Comparative Example 2. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0019] Example 1

[0020] A method for manufacturing a dense short-pile suede fabric includes the following steps: (1) Pre-made type: Trico warp knitting machine is used to knit the greige fabric. The outer yarn of the greige fabric is 50D yarn, the back yarn is 50D yarn, and the knitting density is 36 threads / inch. After the greige fabric is woven, it is pre-shaped at a temperature of 130℃ and a speed of 15m / min.

[0021] (2) First-time napping: The pre-shaped fabric is napped. The napping method is loop napping, the napping number is 3 times, the napping speed is 13m / min, and the nap height after napping is about 1.0mm.

[0022] (3) Dyeing: The fabric obtained in step (2) is dyed. The dyeing solution contains metal chelating agent, dispersant, lightfast agent, flame retardant and disperse dye. The dyeing temperature is 130℃ and the time is 30min.

[0023] (4) Drying and setting: The dyed fabric is dried and set at a temperature of 150℃ and a speed of 15m / min.

[0024] (5) Secondary napping: The fabric after drying and shaping is subjected to secondary napping treatment. The number of napping cycles is 3, the napping speed is 13m / min, and the nap height after napping is about 0.85mm.

[0025] (6) Shaping: The fabric obtained in step (5) is shaped to obtain a dense short-pile suede fabric. The shaping temperature is 150℃ and the speed is 15m / min.

[0026] Comparative Example 1 (1) Pre-made type: Trico warp knitting machine is used to knit the greige fabric. The outer yarn of the greige fabric is 50D yarn, the back yarn is 50D yarn, and the knitting density is 36 threads / inch. After the greige fabric is woven, it is pre-shaped at a temperature of 130℃ and a speed of 15m / min.

[0027] (2) Raising: The pre-shaped fabric is raised by raising the pile in a circular manner, with 3 raising passes and a raising speed of 13m / min. The pile height after raising is about 1.0mm.

[0028] (3) Dyeing: The fabric obtained in step (2) is dyed. The dyeing process is the same as in Example 1. The dyeing solution used for dyeing contains metal chelating agent, dispersant, lightfast agent, flame retardant and disperse dye. The dyeing temperature is 130℃ and the time is 30min.

[0029] (4) Drying and setting: The dyed fabric is dried and set at a temperature of 150℃ and a speed of 15m / min.

[0030] The finished product in this proportion only had its fibers raised before dyeing. In terms of surface appearance, it could not cover the woven pattern well, and the pattern was relatively clearer, failing to achieve the expected suede-like effect.

[0031] Comparative Example 2 (1) Pre-made type: Trico warp knitting machine is used to knit the greige fabric. The outer yarn of the greige fabric is 50D yarn, the back yarn is 50D yarn, and the knitting density is 36 threads / inch. After the greige fabric is woven, it is pre-shaped at a temperature of 130℃ and a speed of 15m / min.

[0032] (2) Dyeing: The fabric obtained in step (2) is dyed. The dyeing process is the same as in Example 1. The dyeing solution used for dyeing contains metal chelating agent, dispersant, lightfast agent, flame retardant and disperse dye. The dyeing temperature is 130℃ and the time is 30min.

[0033] (3) Drying and setting: The dyed fabric is dried and set at a temperature of 150℃ and a speed of 15m / min.

[0034] (4) Raising: The fabric after drying and shaping is raised by raising 3 times at a speed of 13m / min. The height of the raised pile is about 0.85mm.

[0035] (5) Shaping: The fabric obtained in step (5) is shaped to obtain a dense short-pile suede fabric. The shaping temperature is 150℃ and the speed is 15m / min.

[0036] This proportion of finished products only has a napped texture after dyeing. In terms of surface finish, although it covers the woven pattern well, the napped texture is very strong, closer to ordinary napped products, and does not have the style of suede. It also does not achieve the expected suede-like effect.

[0037] The finished product of Example 1 was compared with conventional suede (a suede-like product with a non-woven fabric structure) in a comparative test. The test data are shown in Table 1.

[0038] Table 1

[0039] The measured physical property data show that the present invention achieves the same level as conventional suede (non-woven fabric imitation suede products) in key indicators such as elongation at constant load, shrinkage at constant load, color fastness to rubbing, Martindale pilling (6000 cycles), dimensional change rate, tensile strength, elongation, and tear strength, thus meeting customer requirements. In particular, the elongation at constant load, shrinkage at constant load, and Martindale pilling (6000 cycles) are significantly superior to conventional suede, making it suitable for injection molding and applicable to interior trim applications such as door panels, headliners, sun visors, and pillars.

[0040] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A method for manufacturing a dense short-pile suede fabric, characterized in that, Includes the following steps: (1) Pre-type: After the fabric is woven, the fabric is pre-typed; (2) First napping: Nailing treatment is performed on the pre-shaped greige fabric; (3) Dyeing: Dye the greige fabric obtained in step (2); (4) Drying and shaping: The dyed fabric is dried and shaped. (5) Secondary napping: The fabric after drying and shaping is subjected to secondary napping treatment; (6) Shaping: The fabric obtained in step (5) is shaped to obtain the product dense short-pile suede fabric.

2. The manufacturing method according to claim 1, characterized in that, In step (1), the outer yarn of the woven fabric is 50D-75D yarn, the bottom yarn is 30D-50D yarn, and the weaving density is 28~36 yarns / inch.

3. The manufacturing method according to claim 1, characterized in that, In step (1), the pre-formed temperature is 130℃~150℃ and the speed is 12~18m / min.

4. The manufacturing method according to claim 1, characterized in that, In step (2), the method of raising the nap is circular raising, the number of raising naps is 3 to 6, the raising speed is 13 to 15 m / min, and the nap height after raising is 0.8 to 1.0 mm.

5. The manufacturing method according to claim 1, characterized in that, In step (3), the dyeing solution used for dyeing contains disperse dye and additives, wherein the additives are at least one of metal chelating agents, dispersants, lightfast agents, and flame retardants; The dyeing and holding temperature was 130℃ for 30 minutes.

6. The manufacturing method according to claim 1, characterized in that, In step (4), the drying and shaping temperature is 130℃~150℃ and the speed is 12~18m / min.

7. The manufacturing method according to claim 1, characterized in that, In step (5), the method of raising the nap is circular raising, the number of raising rounds is 3, the raising speed is 13~15m / min, and the nap height after raising is 0.8~0.9mm.

8. The manufacturing method according to claim 1, characterized in that, In step (6), the temperature for shaping is 130℃~150℃ and the speed is 12~18m / min.

9. A dense short-pile suede fabric, characterized in that, It is prepared by the manufacturing method described in any one of claims 1-8.

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