Method for preparing reducing leather based on collagen fiber grey fabric by combining with spunlacing technology
A collagen fiber and collagen fiber technology, applied in non-woven fabrics, textiles and papermaking, etc., can solve the problems of inability to obtain grey fabrics to process and make high-quality leather products, achieve superior mechanical properties, increase elasticity and feel, simple structure
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Embodiment 1
[0038] Embodiment 1 adopts the following steps to realize the present invention:
[0039] 1. Preparation of collagen fiber gray cloth: adopt the preparation method of collagen fiber for direct spinning described in the patent ZL201510228478.4, use wet blue leather as raw material through shearing, ultrasonic pretreatment, drum treatment, liquid defibration, Fiber drying, loosening and impurity removal, carding, and fiber surface treatment steps are used to prepare collagen fibers, and then the collagen fibers are spun into yarns and weaved by a spinning process to obtain collagen fiber fabrics; the specific steps are as follows:
[0040] (1) Cutting: use wet blue leather as raw material, and cut it into the size required by production or equipment with a leather shearing machine;
[0041] (2) Ultrasonic pretreatment: Prepare a pretreatment solution of a polar solvent rich in hydroxyl groups, the amount of the pretreatment solution is 6-25 times the weight of the wet blue leath...
Embodiment 2
[0053] Embodiment 2 Adopt the following steps to realize the present invention:
[0054] 1. Preparation of collagen fiber gray cloth: adopt the preparation method of collagen fiber for direct spinning described in Example 3 of patent ZL201510228478.4, use wet blue leather as raw material through shearing, ultrasonic pretreatment, drum treatment, liquid Collagen fibers are obtained through the steps of fiber disintegration, fiber drying, opening and impurity removal, carding, and fiber surface treatment. The specific steps are as follows:
[0055] (1) Cutting: use wet blue leather as raw material, cut it into the size required by production or equipment with a leather shearing machine, immerse the wet blue leather raw material in a water pool for 2 to 5 minutes, and dry until the moisture content is 60 to 80%;
[0056] (2) Ultrasonic pretreatment: Prepare the pretreatment solution, adjust the pH to 7, raise the temperature to 50°C, completely immerse the wet blue leather in the...
Embodiment 3
[0068] Embodiment 3 Adopt the following steps to realize the present invention:
[0069] 1. Preparation of collagen fiber gray cloth: adopt the preparation method of collagen fiber for direct spinning described in Example 4 of patent ZL201510228478.4, use wet blue leather as raw material and go through shearing, ultrasonic pretreatment, drum treatment, liquid The specific steps for producing collagen fibers are as follows:
[0070] (1) Cutting: use wet blue leather as raw material, and cut it into the size required by production or equipment with a leather shearing machine;
[0071] (2) Ultrasonic pretreatment: Prepare the pretreatment solution, adjust the pH to 7.5, raise the temperature to 40°C, completely immerse the cut wet blue leather in the pretreatment solution for 20 hours, then raise the temperature of the pretreatment solution to 60°C, and adjust the pH 7.5, then soak for 1 hour, and perform ultrasonic low-frequency short-term oscillation at the current temperature...
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