KR100436653B1 - process for multi-effect synthetic nubuck leather - Google Patents

Abstract

In the manufacturing method of artificial leather consisting of applying the adhesive to the fabric, the fiber pile planting step, the adhesive curing step, the hair forming step, after the fiber pile is planted, before the adhesive is completely cured, a part of the pile is removed by a brush It is a manufacturing method of a multibody effect artificial nubuck.

According to the present invention, various effects such as pattern difference, gloss difference, color difference, and touch can be combined in the effect of artificial nubuck obtained by processing fabric or synthetic leather.

Description

Process for manufacturing multi-effect artificial nubuck {process for multi-effect synthetic nubuck leather}

The present invention relates to a method for producing a multibody effect artificial nubuck, to obtain a new nubuck (napping) effect among various classes of synthetic leather imitating natural leather.

After applying an adhesive on a fabric or a film having a flat state or a predetermined pattern by a conventional manufacturing method, a large amount of fiber powder is planted at the same density, so that the effect of pulling, touch, color, etc. has been used to produce leather-like effects.

At this time, the surface has a simple pattern or a simple effect, but has its own characteristics and is used in many applications.

However, there is a need for the development of new and specially effective products that meet the demands of diverse consumer groups who create new trends and aspire to new products.

An object of the present invention is to improve the existing manufacturing process by applying a new method, not a new simple surface effect, but a new product having a variety of effects simultaneously such as a variety of effects such as pattern tea, gloss tea, color tea, touch, etc. Is to provide.

1 explanatory drawing of the manufacturing process of the multibody effect artificial nursing leaf by this invention

Figure 2 Enlarged cross-sectional view of products for each manufacturing process of the present invention

Brief description of drawing symbols

a synthetic synthetic leather or fabric, b adhesive, c fiber powder

1 drawer, 2 cots, 3 wefts, 4 brush, 5 rows, 6 polished stone brushes, 7 windings

end. Cross section of synthetic leather or fabric for processing,

I. Adhesive coated section in cotta

All. Sectional section where fiber powder is planted in

la. Sectional view of part of fiber powder with brush

hemp. Sectional view of products polished with abrasive stone brush

The present invention comprises a step of applying an adhesive to the fabric used in artificial leather, fiber powder planting step, removing the part of the fiber powder with a brush, curing the adhesive step, brush hair step and provided in the present invention to manufacture artificial nubuck with multi-body effect The main technology is to apply a small amount of adhesive when applying the adhesive to the fabric, to remove the fiber powder part with a brush before curing the adhesive, and to clean the hair with the brush after curing the adhesive. .

If you describe the technical features in detail

first. The amount of conventional general adhesive during the hair removal operation varies depending on the amount of fiber powder or the surface requirements of the type of fabric, but in the case of the microfiber fiber powder to be applied in the present invention, 70-130 g of an oil-based urethane adhesive is applied per m 2.

However, in the present invention, the coating amount of the adhesive is applied less than 10-50g per m 2 in a smaller amount than the conventional method.

Existing general method is to prevent the fiber powder is separated by full planting, but in the present invention is to set the fiber powder to be selectively separated.

second. The following is a description of the brushing process before curing the adhesive.

As the synthetic leather or fabric coated with the adhesive passes through the weaving chamber, the fiber powder is planted on the adhesive. At this time, the fiber powder is fixed only after the adhesive is cured while passing through the heat chamber in a temporary adhesive state (暇 接着).

In the present invention, a part of the fiber powder needs to be separated (removed) in order to obtain a partially differentiated hair growth effect.

This is a very important matter newly attempted by the present invention, and it is also contraindicated to apply the force to the surface before curing the adhesive in the conventional hair-growing process.

In particular, when the adhesive is cured, as well as when applying the conventional general adhesive, it is difficult to detach the fiber powder after the adhesive is cured, and even if the physical detaching, the unnatural effect.

In the temporary bonded fiber powder, when the brush is interviewed and rotated, the fiber powder in the concave portion is removed by friction, and the fiber powder in the concave portion remains. At this time, the bristle material of the brush is preferably pig hair, and the round shape is preferable because the installation space may be narrow or the inverter motor may be easily adjusted to facilitate the condition setting.

third. Partially debris-finished products before the adhesive cures are cured while passing through the heat chamber. At this time, the product has the shape of the finished product to be obtained in appearance, but the hair work is performed to obtain a finer feel and a uniform surface. In the present invention, other materials may be used for the friction material of the round brush, but abrasive stone is included. It is preferable to use those which have been made.

In addition to the simple brush effect, this brush removes the temporarily attached fiber powder and removes foreign matter protruding from the surface.

The present invention looks at specific manufacturing processes

The manufacturing process of the present invention follows the procedure of FIG.

1. Fabric

① The fabric was coated with a polyurethane resin on the interlock 190g / ㎡ with a material suitable for clothing.

② The release paper used at this time is R-53 (name of LINTEC Co., Ltd., which is a well-known technique to use as a release paper for the manufacture of synthetic leather). It is a pattern in which small and delicate patterns are like wrinkles of natural leather.

2. Adhesive and Glue Application

① The adhesive is an oil-based urethane adhesive, which has a solid content of 45-50%. The oil-based urethane adhesive is made of long-term molecular weight by adding a crosslinking agent with a polyurethane resin containing organic solvents such as methyl ethyl ketone (MEK), dimethylformamide (D.M.F) and toluene (TOL) as a solvent, and exhibiting physical properties.

② The adhesive application amount of the example was based on 20g per m 2.

③ Coated knife was used for the small amount of coating applied in this example. In this example, 0.3mm knife and 0.1mm knife of 2r (meaning that the rounded end is composed of 2mm radius circle) It gave a good result. However, the thick knife of 5mm or more is not suitable for the fabric of the present example, which has a large amount of tension due to its low shear force and difficulty in applying a small amount and a wide contact surface with the fabric.

3. Planting

(1) The fiber powder was obtained by cutting 0.28 mm of polyester single yarn having a thickness of 0.18 denier.

② The amount of planted fiber powder was about 12g per ㎡.

③ As a result of the test, nylon or rayon fiber powder is OK up to 0.5mm in length, but the longer the pattern, the lower the pattern effect.

4. Brush

(1) After the fiber powder was implanted into the adhesive in the yarn, a part of the fiber powder was separated before the adhesive was hardened (before entering the heat chamber).

② The device is planted to be 30mm long The linear velocity of the brush contact surface was adjusted to about 30 m / min using a circular roll so that the release of the fiber powder was an appropriate amount.

Friction materials can be made with round bristle or abrasive stone, but the bristle was most useful.

5. adhesive curing

In order to promote the drying of the dilution solvent and curing of the adhesive, the mixture was treated for 5 minutes in a hot-air type heat chamber at 80-130 ° C.

6. Grinding Stone Brush

① Abrasive stone brush is made of filament containing fine abrasive stone. The protruding abrasive stone acts during friction.

② In this example, 0.6mm thick abrasive stone filament was planted 75mm long to prevent lines or deviations during the brushing process.

③ The linear velocity of the abrasive stone brush was 50m / min, and the hair removal process was performed. At this time, the fiber powder and foreign substances generated by suction were removed by high pressure vacuum to complete the product.

7. Results

The multibody effect artificial nubuck manufactured as described above vividly not only the thick pattern of the R-53 pattern but also the delicate pattern. In addition, the densities are relatively low in density of fiber powder, so the gloss and texture of synthetic leather are high, and the densities are high in density of fiber powder, which is close to matt and the color of fiber powder is dark. This is a clear two-tone effect.

In addition, the surface has a delicate pattern of general synthetic leather, and when touched, it gives a very soft and comfortable feeling with the flow of fiber powder. And the overall appearance shows the finger effect of nubuck leather and the texture of natural leather is alive.

As described above, the product manufactured in the present example has become an artificial nubuck of various effects combining the advantages of natural leather nubuck and synthetic leather.

8. Use to various products.

Products processed in the above way can be easily produced excellent products in all cases as a result of applying for clothing, seat, shoes.

The above specific manufacturing process does not limit the protection scope of the invention.

The present invention provides a new product having not only a simple surface effect but also various effects such as pattern difference, gloss difference, color difference, and touch.

The part where the fiber powder is separated is relatively low in density of fiber powder, so the gloss and texture of synthetic leather is high, and the part is close to matte due to the high density of fiber powder, and the color of fiber powder is dark, so the two-tone effect is clear and the delicate pattern is clear. To indicate.

In addition, the surface has a delicate pattern of general synthetic leather, and when it is touched, it gives a very soft and comfortable feeling by the flow of fiber powder. And the overall appearance shows the finger effect of nubuck leather, and the texture of natural leather appears. It has become an artificial nubuck with various effects combined with the advantages of leather.

Claims (5)

In the method of manufacturing artificial leather consisting of applying the adhesive to the fabric, the fiber powder planting step, the adhesive curing step, the hair forming step, the step of planting the fiber powder and then removing a part of the fiber powder with a brush before the adhesive is completely cured Method for producing a multibody effect artificial nubuck, characterized in that it comprises The method of claim 1, wherein the adhesive applied in the adhesive application step uses an oil-based urethane adhesive and the amount is 10-50 g per m 2. The method of claim 1 or 2, wherein in the step of removing the fiber powder, the brush is in the form of a circular roll, and the friction material is a pigskin. The method of claim 1 or 2, wherein in order to apply a small amount of the adhesive in the adhesive coating step, the thickness of the coating knife is 0.1mm-1.0mm. [Claim 3] The method for manufacturing a multi-body artificial artificial foil according to claim 1 or 2, wherein the brush in the hair dressing step is a circular roll-shaped abrasive stone-containing filament.