SU914626A1 - Method for processing fur skin - Google Patents

Description

The invention relates to the fur industry and can be used in the machining of fur skins, prior to the manufacture of fur products.

The closest in technical ⁵ essence and attainable result to the present invention is a method for processing fur pelts comprising applying to the leather its embossments and fixing the skin in a stretched state, wherein the embossments in the form of short incisions in the leather skins applied with a cutting tool at right angles to the direction of the desired stretching, and the fixation of the skin is carried out by straightening the frame and then pressing the skin of the thermoplastic pad to the knife fabric (1).

The disadvantage of this method is that when processing the skin cuts are made in accordance with a pre-selected direction of the same2

1 lengthening or expansion of the skin! Cut the knife tissue of the skin and the root system of the hair, which leads to the loss of guard and down hair.

In addition, the presence of cuts leads to the fact that after editing the natural pattern of the hair coat of the skin is disturbed. Thermoplastic gasket increases the weight of the product and its rigidity.

The purpose of the invention is to improve the quality. skins and providing the possibility of stretching them in any direction.

This goal is achieved by the fact that in the method of processing the fur skin, which involves applying its notches to the leather fabric and fixing the skin in the stretched state, applying the notches is performed by piercing the leather fabric with needles with a cone-shaped tip, and moisturizing the skin before fixing.

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Moreover, the slits are placed in a checkerboard pattern at a puncture frequency of 50 * 70 per 1 cm \ and the diameter of the base of the cone of the needle point will be 0.5-0.7 mm

Due to the conical shape of the tip needle, the fibers of the knife tissue at the puncture site are deformed, internal stresses decrease, the fibers stretch, forming a round hole. After removing the needle from the leather fabric, U fibers tend to regain their former position and the hole is reduced. Thus, the fibers of the leather fabric only stretch, but do not break, the corrosive system of guard and down hair does not collapse. As a result, the percentage of cropped hair is less than when cutting the skin using the incision method. In addition, the holes, punctures remain 20 invisible on the leather fabric of the skin, and it does not lose its presentation.

The processing mode is chosen depending on the type of fur. 25

Skins with uniform strength of leather and uniform thickness of hair (mink, muskrat, otter, beaver) are treated over the entire area. thirty

Skins with uneven durability of leather and uneven thickness of hair (fox, arctic fox) are processed along the spinal part of the skin with the capture of 30% of its lateral part.

Punctures are placed in a checkerboard pattern to obtain a uniform strength of the treated skin area. 40

The diameter of the needle and the number of punctures are chosen depending on the thickness of the leather of the skins in the range: the diameter of the needle is from 0.5 to 0.7 mm, the number of punctures is from 50 to 70 punctures per 1 cm ^.

After piercing, the skin is moistened, subjected to fixation - dressing. Due to the fact that the puncture hole has a round shape, the skin can be stretched in any direction.

Example 1. A silver-black fox skin of normal defects is treated with an igloprobivna • machine for non-woven materials, while the diameter of the base of the cone of the tip

VNIIPI Order 1589/34

45

50

55

the needle is 0 ^ 5 mm, and the frequency of punctures is 70. punctures per 1 cm ^.

Perforations are applied along the spinal part of the pelt with the capture of 30% of the lateral part, placing them in a checkerboard pattern. Then the skin is moistened and fixed - edited on the frame.

The increase in area is 17%.

Example 2. On a needle-punching machine for non-woven materials, the mink skin is treated with a normal defect, the punctures are staggered at a frequency of 60 punctures per 1 cm ^ ·, the diameter of the base of the cone of the needle point is 0.7 mm, and the treatment is carried out over the entire area of the skin . Then the skin is moistened and subjected to editing on the frame.

The increase in area is 5%.

The proposed method of processing fur skins allows you to give the skins stretching while maintaining their grade and natural properties, in addition, there is no need for additional fixation of the form of thermal pad, weighting the weight of the skins. The introduction of this method can significantly expand the range of products manufactured from fur skins.

The annual economic effect in the implementation of the proposed method for leather goods will be

more than 1.5 million rubles. ·

Claims (2)

Claim 1. A method of treating a fur skin, comprising applying cut-outs on the leather fabric and fixing the skin in a stretched state, characterized in that, in order to improve the quality of the skins and allow them to be stretched in any direction, the notching is performed by piercing the leather with needles with a cone-shaped tip , and before fixing the skin moisturize .. 2. The method according to claim 1, characterized by the fact that the slits are staggered at a frequency of 50-70 punctures per cm, and the diameter of the base of the cone of the needle point is 0.5 * 0.7 mm . Sources and information taken into account during the examination 1. "Fur industry", Express information. TSNIITEIlegproM, 1975 "No. 4. p. 7 * 10 (prototype).