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CN-122013554-A - Novel production method of embossed basketball leather

CN122013554ACN 122013554 ACN122013554 ACN 122013554ACN-122013554-A

Abstract

The invention relates to the technical field of basketball leather preparation, and provides a novel production method of embossed basketball leather, which solves the defects of unclear and stereoscopic texture of a product produced by the basketball leather in the prior art due to the defects of a production process and comprises the following preparation steps of (1) preparing a base material, wherein the base material is high-elasticity non-woven fabric; the preparation method comprises the steps of (1) preparing composite sizing agent, wherein the composite sizing agent comprises sizing agent A and sizing agent B, (3) coating, pre-curing and embossing, 4) compositing a base material with coated release paper with lines obtained through the treatment of the step (3), drying at 120-150 ℃ for 2-5min, and (5) cooling and stripping the release paper to obtain novel embossed basketball leather.

Inventors

  • WU QINGXIANG
  • QIU MINGXING
  • WU JIANFENG
  • YUE QIANG
  • DU JIAWEI
  • LIU BO
  • SHEN YAN
  • WANG LUYI

Assignees

  • 万华新材料有限公司

Dates

Publication Date
20260512
Application Date
20260408

Claims (9)

  1. 1. The production method of the novel embossed basketball leather is characterized by comprising the following preparation steps: (1) Preparing a base material, wherein the base material is high-elasticity non-woven fabric; (2) Preparing composite slurry, wherein the composite slurry comprises slurry A and slurry B; (3) Coating, pre-curing and embossing, namely sequentially coating the slurry A and the slurry B on the continuously conveyed release paper to obtain release paper with a wet mixed coating, then pre-curing the release paper with the mixed coating to obtain release paper with a plastic surface and a coating, and embossing lines by embossing rollers; (4) Compounding the base material with the coated release paper with the texture obtained by the treatment in the step (3), and then drying at 120-150 ℃ for 2-5min; (5) Cooling, and stripping the release paper to obtain the novel embossed basketball leather.
  2. 2. The production method of the novel embossed basketball leather according to claim 1, wherein the slurry A comprises the following raw materials, by weight, 100 parts of aqueous polyurethane resin, 5-10 parts of wear-resistant reinforcing particles, 1-3 parts of polyfunctional aziridine crosslinking agent, 0.3-0.5 part of polyether siloxane nonionic wetting agent, 0.1-0.3 part of defoaming agent and 5-20 parts of deionized water; The preparation method of the slurry A comprises the steps of mixing and stirring water-based polyurethane resin, polyether silane nonionic wetting agent, defoamer and deionized water uniformly, adding wear-resistant reinforcing particles, continuously stirring until the particles are completely dispersed, adding multitube energy aziridine crosslinking agent, stirring uniformly, and standing for defoaming for later use; The slurry B comprises the following raw materials, by weight, 100 parts of a solvent-free polyurethane prepolymer, 25-35 parts of polyether polyol, 5-8 parts of 1, 4-butanediol, 1-3 parts of deionized water, 0.1-0.5 part of a bismuth zinc composite catalyst, 8-10 parts of a halogen-free flame retardant and 1-3 parts of a foam stabilizer; The preparation method of the slurry B comprises the steps of adding polyether polyol, 1, 4-butanediol, deionized water, a bismuth-zinc composite catalyst, a halogen-free flame retardant and a foam homogenizing agent into a stirring kettle according to the weight parts, stirring for 1-2min at a rotating speed of 1500-2000rpm, uniformly mixing and removing part of bubbles, adding a solvent-free polyurethane prepolymer under the conditions of continuous stirring and vacuum degree of-0.08-0.09 MPa, and continuing stirring for 2-3min to form the slurry B.
  3. 3. The method of claim 1, wherein the reactive component in the B slurry is foamed and primarily crosslinked during the pre-curing treatment in the step (3), so that the surface of the hybrid coating is maintained in a plastic state while the inside has a supporting strength, and the texture is embossed on the surface of the hybrid coating by an embossing roll and primarily set.
  4. 4. The method for producing a novel embossed basketball leather according to claim 1, wherein the pressure of the embossing roller is controlled to be 3-12MPa.
  5. 5. A production method of novel embossed basketball leather is characterized by comprising the specific preparation steps of S1, taking 70-85 parts by weight of polyester staple fibers, 15-30 parts by weight of spandex staple fibers and 1-3 parts by weight of antistatic agents as raw materials, uniformly dispersing the fibers through mechanical opening and air flow mixing, S2, carding the mixed fibers into a web through a carding machine to obtain a web, S3, conveying the web to a double-roller hot rolling machine, carrying out hot-press bonding under the conditions of the roller temperature of 130-155 ℃ and the line pressure of 20-40N/mm, enabling the fibers to be fused and bonded at crossing points to form a stable nonwoven fabric substrate with three-dimensional elasticity, and S4, cooling and shaping the nonwoven fabric after hot rolling through a cooling roller, and finally coiling for standby.
  6. 6. The method of claim 1, wherein the embossing roll in step (3) is provided with replaceable modular embossing roll sets having different textures.
  7. 7. The method for producing a novel embossed basketball leather according to claim 2, wherein the aqueous polyurethane resin is an aliphatic aqueous polyurethane dispersion with a biobased content of not less than 30%.
  8. 8. The method for producing novel embossed basketball leather according to claim 2, wherein the wear-resistant reinforcing particles are a compound of nano silicon dioxide modified by a silane coupling agent and aqueous polyurethane wax slurry, and the mass ratio of the nano silicon dioxide modified by the silane coupling agent to the aqueous polyurethane wax slurry is 3:1.
  9. 9. The method of claim 7, wherein the bio-based material is selected from the group consisting of vegetable oil polyols, bio-based polyether polyols, and saccharide derivative polyols.

Description

Novel production method of embossed basketball leather Technical Field The invention relates to the technical field of basketball leather preparation, in particular to a novel embossed basketball leather production method. Background Basketball leather is used as high-performance artificial leather, and needs to meet the severe requirements of professional sports on wear resistance, impact resistance, high rebound, comfortable hand feeling and stable grasping feeling. The main technology for producing the embossed basketball leather in the prior art is that a microporous layer is formed on a base cloth through a wet process and then a surface layer is coated through a dry process and embossing is carried out, the embossing is carried out in a high-temperature hot pressing mode, the surface layer resin is easy to age and influence the durability and flexibility of the product, the basketball leather material with high density and high hardness is easy to cause uneven pattern depth and weak third dimension, the pattern is easy to lighten or even disappear due to stress rebound in long-term use, and the problems of emission and residue of volatile organic matters exist due to the use of organic solvents such as dimethylformamide are relatively not environment-friendly. The Chinese patent publication No. CN120816795A discloses a fully recyclable TPU foaming basketball leather and a preparation method thereof, the TPU foaming basketball leather comprises a TPU foaming film and a TPU film arranged at the upper end of the TPU foaming film, wherein the TPU film comprises, by weight, 60-80 parts of TPU particles, 35-45 parts of TPU-modified skin fiber composite materials, 15-25 parts of hydroxyl-terminated nitrile rubber, 7-12 parts of reinforcing fillers, 5-8 parts of lubricants and 6-9 parts of antioxidants. The TPU foaming basketball leather can be fully recycled, and meanwhile, has excellent wear resistance, bending resistance, ageing resistance, tensile strength, impact resistance and anti-explosion performance, is convenient to use and wide in application range, but the TPU foaming basketball leather is focused on the improvement of the environmental protection of the material, and does not relate to how to press clear lines on the basketball leather. Disclosure of Invention Therefore, aiming at the problems, the invention provides a novel production method of the embossed basketball leather, which solves the defects of unclear and stereoscopic lines of the manufactured product caused by the defects of the production process of the basketball leather in the prior art. In order to achieve the aim, the invention adopts the following technical scheme that the novel embossed basketball leather production method comprises the following preparation steps: (1) Preparing a base material, wherein the base material is high-elasticity non-woven fabric; (2) Preparing composite slurry, wherein the composite slurry comprises slurry A and slurry B; (3) Coating, pre-curing and embossing, namely sequentially coating the slurry A and the slurry B on the continuously conveyed release paper to obtain release paper with a wet mixed coating, then pre-curing the release paper with the mixed coating to obtain release paper with a plastic surface and a coating, and embossing lines by embossing rollers; (4) Compounding the base material with the coated release paper with the texture obtained by the treatment in the step (3), and then drying at 120-150 ℃ for 2-5min; (5) Cooling, and stripping the release paper to obtain the novel embossed basketball leather. Further, the slurry A comprises the following raw materials, by weight, 100 parts of aqueous polyurethane resin, 5-10 parts of wear-resistant reinforcing particles, 1-3 parts of polyfunctional aziridine crosslinking agents, 0.3-0.5 part of polyether siloxane nonionic wetting agents, 0.1-0.3 part of defoaming agents and 5-20 parts of deionized water; The preparation method of the slurry A comprises the steps of mixing and stirring water-based polyurethane resin, polyether silane nonionic wetting agent, defoamer and deionized water uniformly, adding wear-resistant reinforcing particles, continuously stirring until the particles are completely dispersed, adding multitube energy aziridine crosslinking agent, stirring uniformly, and standing for defoaming for later use; The slurry B comprises the following raw materials, by weight, 100 parts of a solvent-free polyurethane prepolymer, 25-35 parts of polyether polyol, 5-8 parts of 1, 4-butanediol, 1-3 parts of deionized water, 0.1-0.5 part of a bismuth zinc composite catalyst, 8-10 parts of a halogen-free flame retardant and 1-3 parts of a foam stabilizer; The preparation method of the slurry B comprises the steps of adding polyether polyol, 1, 4-butanediol, deionized water, a bismuth-zinc composite catalyst, a halogen-free flame retardant and a foam homogenizing agent into a stirring kettle according to the weight parts, stirring for 1-2m