Air permeable composite leather and processing process thereof
A processing technology and air permeability technology, applied in the field of breathable composite leather and its processing technology, can solve the problems of polluted environment, a large amount of waste water, and insufficient comfort, and achieve the effects of low waste water concentration, cost saving and low price
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[0031] figure 1 with figure 2 Show the specific embodiment of the present invention: a kind of air-permeable composite leather, comprise fiber fabric surface layer 1, PVC leather layer 2, corium layer 3 and weft-knit fabric base cloth layer 4, the PVC leather 2 layers of 0.5mm pass adhesive Adhered to the corium layer 3, the fiber fabric surface layer 1 is adhered to the PVC leather layer 2 through an adhesive, and the corium layer 3 is adhered to the weft-knitted fabric base cloth layer 4 through an adhesive, and the thickness of the corium layer 3 is 0.8mm .
[0032] combine figure 2 As shown, the surface of the PVC leather layer 2 is provided with polyurethane particles 5 with a microporous structure.
[0033] In order to make the technical features, creative features, goals and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
Embodiment 1
[0035] A processing technology for air-permeable composite leather, characterized in that the steps include:
[0036] (1) Batching: classify the raw hides with a width error of ±5cm and a thickness error of ±1mm, and put them in the same drum for processing;
[0037] (2) Soaking in water: pre-soak the leather for 2 hours before soaking in water, add 0.5% of soda ash, 0.3% of water-soaking aid, and 0.3% of water-soaking enzyme into the soaking solution. Vacuumize and rotate for about 3 hours, heat the operating fluid to 25°C, and the pH value reaches 6, and then rotate for 2 hours to meet the process requirements;
[0038] (3) Hair removal and degreasing: At vacuum degree: 3800Pa, the initial liquid ratio is 1:2 for hair removal and degreasing, first add 1% sodium hydrogen sulfide, 0.5% depilatory aid and water, turn the drum rotor for 30 minutes, then add vulcanization Sodium 0.5% and water, after another 30 minutes, add lime 4% and water, check after 4 hours, the temperature...
Embodiment 2
[0051] A processing technology for air-permeable composite leather, characterized in that the steps include:
[0052] (1) Batching: classify the raw hides with a width error of ±5cm and a thickness error of ±1mm, and put them in the same drum for processing;
[0053] (2) Water immersion: pre-soak the leather for 2 hours before immersion, add 0.5% of soda ash, 0.3% of water immersion aid, and 0.3% of water immersion enzyme to the soaking solution, and soak in water at a vacuum degree of 3800Pa and an initial liquid ratio of 1:3. Vacuumize and rotate for about 3 hours, heat the operating fluid to 26°C, and the pH value reaches 6, and then rotate for 2 hours to meet the process requirements;
[0054] (3) Hair removal and degreasing: At vacuum degree: 3800Pa, the initial liquid ratio is 1:2 for hair removal and degreasing, first add 1% sodium hydrogen sulfide, 0.5% depilatory aid and water, turn the drum rotor for 30 minutes, then add vulcanization Sodium 0.5% and water, after anot...
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Abstract
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