Method for making flexible dry milled leather through low-grade wet blue leather
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A wet blue leather, low-grade technology, applied in the field of high-grade wet blue leather to make soft wrinkled leather, can solve the problems of reduced mobility, stiff hand, low softness, etc. The effect of selective filling
Active Publication Date: 2018-05-04
XINGYE LEATHER TECH CO LTD
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However, the oil in wet blue leather is almost completely removed in the pre-tanning preparation process, and with the loss of moisture in the leather, the collagen fibers are bonded together, the mobility is reduced, the hand feeling becomes stiff, and the softness is extremely low.
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[0016] The implementation of the present invention will be described in detail below in conjunction with specific examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the reagents and products used are also commercially available. Various processes and methods not described in detail are conventional methods well known in the art, and the reagents used are common reagents that can be purchased through commercial channels.
[0017] A method for making soft tumbled leather by utilizing low-grade wet-blue leather, comprising the steps of:
[0018] Step (1) Squeeze water, cut evenly, and weigh: Select 2 pieces of low-grade wet blue leather with disabled grain surface and loose surface, and cut evenly until the thickness is 1...
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Abstract
The invention relates to the technical field of leather making process, and provides a method for making flexible dry milled leather through low-grade wet blue leather. The method comprises the stepsof water squeezing shaving and weighing of the selected low-grade wet blue leather, softening and rising, washing, neutralizing, washing, grease adding, washing, drum outlet standing, water squeezingextension, primary hanging airing drying, softening, dyeing, washing, color registering, washing, surface treatment, washing, drum outlet standing, water squeezing extension, secondary hanging airingdrying, flesh side water spraying and standing, vibration staking, milling and coating. On the basis of the traditional process, three procedures of retanning, filling and vacuum drying in the after-tanning wet machining segment can be removed, the whole operation flow is short, the method is suitable for large-batch production use, the cost is reduced by 30%, the leather yield is increased by 20%, the leather hand feeling is soft and light, the leather body is rich and elastic, the pattern is full and uniform, and the utilization rate is high.
Description
technical field [0001] The invention relates to the technical field of tanning technology, in particular to a method for making soft tumbled leather by using low-grade wet blue leather. Background technique [0002] Low-grade wetblue leather refers to wetblue leather with defects or disabilities such as loose surface, thorn scratches, and blood tendons on the grain surface. The causes of low-grade wet blue leather can be specifically divided into: ①The animals are produced during the growth period or after slaughtering, such as horsefly bites, abrasions, ringworm, branding, etc. formed during the growth period of the animals, and the tracing knife produced after the animals are slaughtered ②Improper treatment process from raw hide to wet blue leather, such as insufficient soaking and liming resulting in obvious blood tendons, improper control of temperature and mechanical action during soaking and liming, improper fleshing operation, etc. face serious. The existence of the...
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