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Roll Coating Star Genuine Leather Production Line

Product name: Roller Coating Star GTSG3 - 340

Cover up flaws: Conceal natural defects such as scars, insect bites, and vascular streaks to improve utilization rate and grade.

Unify appearance: Make the color difference, gloss, and texture of a single piece of leather or even a batch of leather tend to be consistent to meet the requirements of industrial production.

Endow with style: Create a wide variety of products ranging from full - grain natural - looking, corrected - grain practical types to embossed fashionable styles.

Improve physical properties: Enhance practical properties such as wear resistance, dirt resistance, easy care, and light resistance.

Fix the hand - feel: Endow and stabilize tactile experiences such as softness, fullness, smoothness, and waxy feeling.

Detailed Explanation of Genuine Leather Finishing Process
Key control points of genuine leather roller coating process
Advantages of genuine leather roller coating process
Roller Coating Machine Solutions

Fine lamination system

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· Backing/Base coat: Filling and sealing: Fill pores, cover minor damages, reduce regional differences, and prevent excessive penetration of subsequent pastes. It requires strong adhesion and softness.

Apply by wiping paste, roller coating, etc. It requires good penetration and strong filling ability. It may be carried out 1 - 2 times.

· Coloring layer (intermediate coat): Endow the base color and uniform appearance: Provide the main color and basic gloss. It requires full and uniform color, strong covering power, and the coating layer should be soft and elastic.

Precision spraying or roller coating is often used, which is the key to determining the color quality.

· Top layer/Top coat: Provide hand - feel and physical properties: Endow the leather with the final gloss (high - gloss, matte), hand - feel (smooth, waxy, soft), and physical properties (scratch - resistant, wear - resistant).

· Effect (optional): Create a special style: Achieve advanced artistic effects such as polishing color change, antiquing, metallic luster, and pearlescence.

· Polishing/Embossing (post - finishing): Enhance the texture: Further adjust the gloss and texture through mechanical means.

Genuine leather production process

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Phase 1: Preparation Phase (from raw hide to "wet

The core of this stage is cleaning, preservation, and preliminary treatment to prepare for subsequent tanning. 1. Preservation and Preservation: Animal hides (raw hides) are perishable. Immediately after slaughter, they must be salted, dried at low temperatures, or salt-dried to inhibit bacterial growth and facilitate transportation and storage. 2. Soaking: The hardened hides are soaked in clean water to restore softness and hydration, and to wash away blood, salt, and soluble proteins. 3. Dehairing and Liming: The hides are soaked in a solution containing lime and sodium sulfide. This process can: • Expand the hide layer and loosen the fibrous structure. • Dissolve the epidermis and hair roots, facilitating hair removal. • Remove some grease and impurities. 4. Deliming and Softening: • Deliming: Acidic substances such as ammonium salts are used to neutralize the alkaline lime in the hide, creating a suitable pH environment for the next tanning step. • Softening: Enzymes are added to

The second stage: Tanning stage (transforming raw

Tanning is the core chemical process that determines the properties of leather, stabilizing collagen fibers through tanning agents. 1. Chrome tanning: Approximately 90% of leather is tanned using this method. It uses trivalent chromium salts, resulting in a pale blue color, known as "wet blue leather." The finished product is soft, elastic, and highly resistant to moisture and heat, suitable for shoes, clothing, and furniture. 2. Vegetable tanning: This method uses plant tannins, resulting in a natural light brown leather that is firm, highly malleable, environmentally friendly, and biodegradable. It is often used for belts, bags, and leather carving. 3. After tanning, the leather needs to be squeezed dry, shaving evenly to obtain a uniform thickness, and then neutralized for subsequent processing.

Phase 3: Finishing Stage (Giving the final appeara

This stage determines the final color, texture, luster, and physical properties of the leather. 1. Retanning, Dyeing, and Fatliquoring: Retanning improves softness or fullness; dyeing achieves the desired color; fatliquoring lubricates the fibers and enhances suppleness. 2. Drying and Finishing: After drying using various methods, mechanical treatments such as stretching and tumbling improve the feel. Surface imperfections can be sanded to create suede or nubuck. 3. Finishing (a crucial surface treatment): Multiple layers are applied to the leather surface to enhance its appearance, protect it, and standardize quality. The process includes: Base coat: Seals the leather surface, providing a base for subsequent coatings. Intermediate coat: Adds color and covers some imperfections. Top coat/Hand feel layer: Provides the final shine (high gloss, matte, waxy feel, etc.), feel, and special properties such as abrasion resistance and water resistance. Depending on the degree of finishing, fin

第一阶段：准备阶段

第二阶段：鞣制阶段

第三阶段：整饰阶段

Strive to become a global surface finishing expert

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Thirty years in the leather port, the truth is revealed in one coating. We understand leather and the industry's needs better. With a stable roller coating process and customizable finishing solutions, we lay a solid foundation for the quality of mid - to high - end leather products and become a trusted finishing technology partner for global customers.

✅ Precise thickness control starting from 0.01mm

✅ Environmentally friendly solvent - free / low - solvent system

✅ Weather - resistant and durable, suitable for all - scenario needs