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How to finish calfskin style leather

A calfskin and leather technology, applied in the field of tanning, can solve the problems of increased production cost of calfskin leather goods, high price of calfskin leather blanks, limited quantity of calfskin leather blanks, etc. high effect

Active Publication Date: 2015-10-28
JIHUA 3514 LEATHER & FOOTWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the quantity of calfskin blanks on the market is limited and cannot meet a large number of market demands; in addition, due to the high price of calfskin blanks, which is far higher than the price of ordinary cowhide leather blanks, the production cost of making calfskin leather goods will increase

Method used

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  • How to finish calfskin style leather
  • How to finish calfskin style leather
  • How to finish calfskin style leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Embodiment 1 A kind of finishing method of imitation calfskin style leather

[0103] This method can make large-format yellow cowhide into calfskin-style leather, which is carried out in the following steps:

[0104] ⑴One time embossing

[0105] Adjust the ironing board of the leather embossing machine to a thin board pattern, the temperature is 80°C, the pressure is 150kgf, and the leather blank after retanning and dyeing of the large-format yellow cattle is embossed for 4 seconds. The embossed leather blank is A1, which is the same as The side that touches the ironing board is the front side;

[0106] ⑵ Polishing

[0107] Adjust the speed of the polishing machine to 90 yards / h, the gap between the felt and the roller to 2mm, and polish the front side of A1 to obtain B1;

[0108] ⑶ spray dye water

[0109] In parts by weight, 15 parts of dye water and 85 parts of water are evenly mixed, and the mixed dye water is evenly sprayed on the front of B1 with a manual spr...

Embodiment 2-6

[0167] Embodiment 2-6 The finishing method of imitation calfskin style leather

[0168] Embodiments 2-6 are respectively a method of finishing a calfskin-style leather, and the finishing process steps are the same as in Example 1, except that the parameters used in the finishing process are different, as shown in Table 1:

[0169] Table 1 Relevant parameters involved in the finishing method of imitation calfskin style leather

[0170]

[0171] The imitation calfskin style leather provided in Examples 2-6 has bright and transparent appearance, dark color, fine grain surface, clear pores, soft and smooth hand feeling, plump bones, wear-resistant coating and high strength; the finishing process is simple, Low production cost.

Embodiment 7

[0172] Example 7 Test of strength and color fastness to rubbing of imitation calfskin style leather

[0173] Embodiment 7 has carried out strength and color rubbing fastness test to imitation calfskin style leather provided in embodiment 1-6, and specific result is as follows:

[0174] ⑴Strength test

[0175] Tear strength≥60N / mm 2 , load elongation (when the tensile strength is 10N / mm 2 time) ≥ 50%;

[0176] ⑵Color fastness to rubbing test

[0177] Dry rubbing ≥ 4 (level), wet rubbing ≥ 3 (level).

[0178] Evaluation standard for domestic calfskin leather: when the tear strength is ≥50N / mm 2 , load elongation ≥ 45%, the strength of calfskin leather is qualified; when dry rubbing ≥ 3 (grade), wet rubbing ≥ 2 (grade), the color fastness to calfskin leather is qualified. When the tear strength ≥ 60N / mm 2 , When the load elongation rate is ≥50%, the strength of the calfskin leather is high; when the dry rubbing is ≥4 (grade), and the wet rubbing is ≥3 (grade), the color ...

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Abstract

The invention discloses a method for finishing leather imitating a calfskin style. The method comprises the steps of primary embossing, polishing, dye water spraying, bottom sealing agent spraying, bottom slurry spraying, secondary embossing, surface slurry spraying, three-time embossing, bottom-layer brightening liquid spraying, primary ironing, four-time embossing, top-layer brightening liquid spraying and secondary ironing which are implemented in sequence. The leather with the calfskin style is prepared by using a cow leather billet with a large size and a rough grain surface through a finishing process, and the prepared leather is bright and transparent in appearance, dark in color, fine in grain surface, clear in pores, soft and smooth in hand feeling, plump in body and bone, wear-resistant in coating and high in strength; the preparation method is simple in finishing process and low in cost; the difficulties of purchasing calfskin billets are solved, and a large amount of market demands for the calfskin leather are met. The method disclosed by the invention is suitable for manufacturing the leather with the calfskin style.

Description

technical field [0001] The invention belongs to the field of tanning, and relates to a method for finishing leather, in particular to a method for finishing leather imitating calfskin style. Background technique [0002] Calfskin has fine pores on the surface, is soft and smooth, and is highly elastic. It is a relatively good leather material. Various leather goods made of calfskin are very popular among the public. [0003] However, the quantity of calfskin blanks on the market is limited, which cannot meet a large number of market demands; in addition, due to the high price of calfskin blanks, which is far higher than the price of ordinary cowhide leather blanks, the production cost of making calfskin leather goods will increase. The epidermis of yellow cowhide is thin, accounting for about 0.5% of the total thickness of the leather. The pores are small and dense. The thickness of each part of the cowhide is relatively uniform, the difference between the parts is small, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C11/00
Inventor 刘莹光郝燕玲梁文华郑海涛
Owner JIHUA 3514 LEATHER & FOOTWARE
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