KR910000056B1 - Filler used for synthetic leather and synthetic leather using the same - Google Patents

Abstract

No content.

Description

Filling materials for synthetic leather and synthetic leather using the same

The present invention relates to a filler for synthetic leather and to synthetic leather using the same. Synthetic leather sheets are widely used as sheet materials for automobiles. In recent years, for example, a sheet in which synthetic resin liquids containing ground powder have arrived in the form of leather, is made into a leather film, and has leather properties. It is proposed (Japanese Patent Laid-Open No. 62-263384). By the way, since such a revolution is a product of the leather part, which is calculated in a large amount in a shaving process, the surface may be streaked with a change over time. Thus, there is a problem that the value of goods is significantly reduced.

Therefore, the inventors of the shaving process, by low-temperature drying in the temperature range not to lose the fiber component after washing, the fine powder obtained in the shaving process of the tanned leather, by grinding 50 to 150 mesh pass The change over time, which is a drawback of the revolution produced as a by-product, has provided an innovation that can solve the cause of stripe pattern on the sheet surface without losing the texture or feel of natural leather.

In other words, the first object of the present invention is to provide a synthetic leather of excellent quality by using the processed revolution. By the way, although the physical properties of the natural leather can be imparted to the resin layer by uniformly dispersing the ash powder throughout the resin layer, the tensile strength of the resin layer is increased unless the amount of the ash powder is increased or the ash powder is uniformly dispersed in the resin layer. The disadvantage is that the strength is lowered and the durability is insufficient.

Accordingly, a second object of the present invention is to provide a synthetic leather which can uniformly disperse the revolution in the synthetic resin layer without reducing the tensile strength of the synthetic leather, thereby maximizing the effect of the addition of the leather.

According to the first aspect of the present invention, "The synthetic leather resin is dried at a low temperature in a temperature range in which the fiber component is not lost after washing the powder obtained in the shaving process of the tanned leather as a filler for filling. Synthetic leather sheet formed by blending 10-30% by weight of finely ground fine powder in a 50-150 mesh path furnace, homogeneously dispersed and molded into a sheet shape.

In the present invention, the revolution used as the filler for filler is treated as follows.

It is preferable that the washing temperature is the lower limit of 30 deg. C, in which the removal effect of various chemical components incorporated in the revolution is remarkably improved. If it is less than that, the removal effect cannot be expected very much, and since it does not show a change much more, it is good to wash at 30-50 degreeC in consideration of thermal efficiency.

In order to enhance the cleaning effect, a small amount of penetrants such as LTS-1000 and Riviere-Le M (trade name, manufactured by Osaka Samwha Chemical Co., Ltd.) are preferably added to the washing water.

Drying after washing | cleaning needs to carry out heat drying at 100 degrees C or less under atmospheric pressure, or drying under reduced pressure.

When dried at 100 ° C or higher under atmospheric pressure, the fiber component in the revolution is thermally decomposed and lost, making it difficult to achieve a predetermined effect. For grinding, drying to 5% or less of moisture is recommended.

The ground powder thus obtained is pulverized and then screened to recover the finely ground in the range of 50-150 mash passes. When it is 150 mesh pass or less, the physical properties of the fiber component of the revolution cannot be effectively used, and a texture and feel of natural leather cannot be created.

On the other hand, when 50 mesh passes or more, a surface will become rough and surface state will worsen.

Thus, a range of 50-150 mesh passes is preferred. As the resin for synthetic leather, thermoplastic resins such as vinyl chloride resin and urethane resin, which are generally used for synthetic leather, are used, and the calcined processing is carried out by filling and uniformly dispersing the above-described treated dust in the range of 10-30% by weight. It is processed into a sheet shape by the coating method represented by the following. If the blending amount is 10% by weight or less, the effect of the addition of powder does not appear. On the other hand, if the content exceeds 30% by weight, durability as a sheet material such as tensile strength is insufficient.

However, in the case of foaming the synthetic resin layer, considering the synergistic effect with air bubbles, the blending amount shows the effect of revolution addition from 5% by weight, but if it exceeds 15% by weight, the durability of the sheet material such as tensile strength is lowered, so 5-15% by weight. It is good to use the range of%.

Therefore, the present invention, after the cleaning process obtained in the shaving process of the leather tanned as a filler for the synthetic leather resin, the fiber component is dried at a low temperature range, 50-150 mesh pass The present invention also provides a synthetic leather sheet formed by mixing 5 to 15% by weight of pulverized fine powder and foaming.

According to the structure of the above invention, in the foamed and non-foamed synthetic leather sheet, the texture and feel of natural leather, for example, the moisture permeability not present in conventional synthetic leather, without impairing the durability required for synthetic leather such as tensile strength, can be obtained. Can be given.

In particular, the vinyl chloride sheet has a defect in inferior texture and feel due to the extremely low moisture permeability compared to the urethane sheet, but it has the advantage of being inexpensive and excellent in durability. Even if the resin is mainly used, improved synthetic leather with excellent moisture permeability can be provided.

On the other hand, in the above-described constitution, although the fiber component is considered to function as an additive in the form of a synthetic resin filler, when the glue or gelatin produced as a by-product of natural leather is used as a binder of such a fiber component and a synthetic resin component, In addition, the texture and feel of natural leather can be added to synthetic leather.

Therefore, the second aspect of the present invention is "50% by drying at low temperature in the temperature range in which the fiber component is not lost after washing treatment of the leather obtained from the shaving step of the leather tanned as a filler for the synthetic leather to the resin, 50 The non-foamed synthetic leather sheet and "synthetic leather resin" formed by blending 10-30% by weight of finely ground crushed powder with -100 mesh pass, after the washing process obtained in the shaving process of the tanned leather as a filler In the form of a foamed synthetic leather sheet formed by foaming by blending 5-15% by weight of pulverized finely ground with a 50-150 mesh pass by drying at a low temperature in a temperature range in which the fiber component is not lost, "glue as binder" Or by uniformly dispersing the additive obtained by diluting gelatin with 0.5-10% by weight of glue or gelatin dry weight, and molding in a sheet state. To provide a leather sheet castle ".

Glue or gelatin blended as a binder needs to be uniformly dispersed as compared with the synthetic resin component. However, even when the glue or gelatin powder is mixed with the synthetic leather resin as it is, it is difficult to disperse uniformly.

For this reason, in the present invention, when using vinyl chloride resin as the resin, the glue or gelatin is mixed with a plasticizer, a dispersing safety agent, and the like beforehand, and diluted, and when using a urethane resin, the polyol component Mixing in advance or diluting with a glycol component which is a chain extender is preferable before use. The compounding quantity with respect to resin powder is preferable in the range which 0.5-10 weight% is mix | blended with the glue or gelatin dry weight. This is because a predetermined addition effect does not appear at 0.5 wt% or less, whereas at 10 wt% or more, it causes the durability of synthetic leather.

According to the second aspect of the present invention, a glue or gelatin component having a resinous property acts as a binder between the dust and the synthetic resin, which can exhibit the texture and feel of natural leather. Therefore, the moisture vapor permeability is improved by two or more compared with the case where only the revolution is added and mixed.

In addition, when the synthetic leather sheet containing the glue or gelatin component is hydrothermally treated, part of the glue or gelatin in the synthetic leather sheet is lost to form pores in the form of natural leather. It is dramatically improved and the physical properties comparable to natural leather appear.

Presently, as a method of imparting breathability to a synthetic leather sheet, ① mechanically and electrically perforating, ② stencil printing a plastisol on air bubbles, and using the exposed direct wood Method 3) Although a method of mixing soluble DMF in water, rolling coating, washing with water and eluting DMF has been proposed, the hydrothermally treated sheet according to the present invention can be glued or gelatin and powder in the outside and inside the resin through pores. As a result of the components communicating, there is a difference in that it is considered to form a moisture-permeable physical structure of natural leather.

The first and second configurations of the present invention described above can be used for synthetic leather sheets such as soft vinyl chloride and urethane resin formed by membrane purification of a top layer on the foam layer surface.

In other words, in the third aspect of the present invention, in the synthetic leather sheet formed by film-forming the top layer on the surface of the foam layer, the "foaming layer washes the powder obtained from the shaving process of the tanned leather as a filler for the synthetic leather resin. Low temperature drying in the temperature range where the fiber components do not disappear after treatment, and 5-15% by weight of the finely ground crushed powder in a 50-150 mesh pass, or foamed or tanned as a filler for synthetic leather resin 5 to 15% by weight of the fine powder, which is dried in a temperature range in which the fiber component is not lost and then pulverized with 50 to 150 mesh passes, and diluted with glue or gelatin as a binder. The additives are foamed by blending 0.5-10% by weight of glue or gelatin dry weight, while the top layer is used for filling the resin for synthetic leather. As a result, after cleaning the wood obtained in the shaving process of the tanned leather, it is dried at low temperature in the temperature range where the fiber component is not lost, and 10-30% by weight of the finely ground wood powder is mixed with 50-150 mesh pass to form a film. Alternatively, for the synthetic leather resin, after the washing process is performed on the shaving process of the tanned leather as a filler filler, it is dried at a low temperature in a temperature range where the fiber components are not lost, and finely ground in a 50-150 mesh pass. The present invention provides a synthetic leather sheet formed by forming a film by mixing -30% by weight and an additive obtained by diluting glue or gelatin as a binder and 0.5-10% by weight as a glue or gelatin component.

In general, when it is necessary to apply a leather surface treatment agent as a surface layer, it is preferable to apply a surface treatment agent comprising 0.5-10% by weight of glue or gelatin as a dry weight in the surface treatment agent. It is preferable because it does not inhibit.

Hereinafter, the present invention will be described in detail with reference to Examples.

[Revolutionary Manufacturing Example]

After the tanning process, the revolution obtained in the shaving process is washed with warm water, drained and a penetrant is added, followed by stirring and mixing under hot water for 2 hours. After draining, the mixture is washed with water for 1 hour, drained again, and a penetrant is added and stirred and mixed under hot water for 1 hour. After that, the water and the washing in hot water are repeated three times.

The washed revolution is gradually dried at a furnace internal temperature of 60-80 ° C. to 1% or less of moisture content, and then pulverized with an impact mill (manufactured by Ido Network Engineering). The screening is then followed to retrieve a 50-150 mesh pass revolution.

Example 1

The soft vinyl chloride compound for synthetic leather is heated and melted, and 15% by weight of the ground powder (100 mesh pass) treated according to the present invention is mixed and uniformly dispersed to form a sheet roll shape.

Example 2

The soft vinyl chloride compound for foamed synthetic leather is heated and melted, and 5% by weight of the powder (100 mesh pass) treated by the present invention is mixed with it, uniformly dispersed and formed into a sheet shape as a calender roll, followed by heating. Foaming through the process produces a foam sheet.

Comparative Test Example 1

On the other hand, instead of the revolution according to the present invention, unprocessed revolution (100 mesh pass) was mixed in the same amount, uniformly dispersed, and formed into a sheet shape to observe a change over time.

As a result, the sheet using the untreated ground is the same as the sheet using the untreated ground and the texture and feel of natural leather such as moisture permeability, but no change occurs on the surface. A stripe pattern appeared on the surface of the product, which greatly inhibited the appearance of the product.

Example 3

With respect to the soft vinyl chloride compound for synthetic leather, the glue or gelatin is mixed with a plasticizer and a dispersion stabilizer in advance and diluted and dispersed, and 5% by weight of the glue or gelatin is added to the dry weight, followed by stirring and mixing under heating. 15% by weight of the ground (100 mesh pass) treated by the mixture was uniformly dispersed and formed into a sheet shape as a calender roll.

Example 4

With respect to the soft vinyl chloride compound for foamed synthetic leather, the glue or gelatin is mixed with the plasticizer and the dispersion stabilizer in advance, diluted and dispersed, and 5% by weight of the glue or gelatin dry weight is added, followed by stirring and mixing under heating. 5% by weight of the ground (100 mesh pass) treated by the mixture was uniformly dispersed to form a sheet in a calender roll, and then foamed through a heating step to prepare a foam sheet.

[Examples 5 and 6]

The vinyl chloride sheets prepared in Examples 3 and 4 were immersed in hot water at around 100 ° C. and dried by hot water treatment.

On the other hand, instead of the revolution according to the present invention, except in the same amount of unprocessed revolution (100 mesh pass) was mixed in the same manner as in Examples 3 and 4 to form a sheet and subjected to hydrothermal treatment.

As a result, the sheet using the groundwater according to the present invention is equivalent to the texture and feel of the natural leather such as the sheet using the untreated ground and moisture permeability, but no change occurs on the surface of the sheet using the untreated ground. Stripes appeared on the surface, which severely inhibited the appearance of the product.

[Water vapor permeability comparative experiment example]

The moisture permeability of the synthetic leather sheet prepared in Example 1-5 was tested by Japanese Industrial Standard "Method of Testing Leather Moisture" (JISK 6549) and compared with untreated natural leather.

The results are shown in the first table below.

In this standard, the moisture permeability refers to the amount of water vapor that passes through the membrane area of the unit area at a given time, and the air on one side has a relative humidity of 80 ± 5% at the temperature of 30 ± 1 ° C. When the air was kept in a dry state, the mass (mg) of water vapor passing through this interface in 1 hour was converted per 1 cm 2 of leather, and the value was taken as the moisture permeability.

[Table 1]

Example 7

As shown in Example 1, the soft vinyl chloride compound for synthetic leather was heated and melted, and 15% by weight of the ground powder (100 mesh pass) treated according to the present invention was mixed with this, and uniformly dispersed to form a calender roll film. As shown in Example 2, as shown in Example 2, 100% by weight of soft vinyl chloride compound or urethane resin compound for foamed synthetic leather was heated and melted, and the ground powder treated according to the present invention (100 mesh pass). 5% by weight of the mixture was uniformly dispersed to form a calender roller sheet shape, and then foamed through a heating process to form a foamed sheet was bonded to prepare a synthetic leather.

Example 8

As shown in Example 3, 5% by weight of glue or gelatin dry weight was added to the soft vinyl chloride compound for synthetic leather, followed by stirring and mixing under heating, to which the treated wood (100 mesh pass) was treated. 15% by weight of the mixed top, uniformly dispersed to form a calender roll in the form of a film, and as shown in Example 4, 5% by weight of the soft vinyl chloride compound for foamed synthetic leather and the dry weight of the glue or gelatin 5 wt% of the ground powder (100 mesh pass) treated according to the present invention was mixed with the mixture by stirring under heating, and then uniformly dispersed to form a sheet in a calender roll, followed by foaming through a heating process. A synthetic leather sheet was prepared by adhering one foam sheet.

As is apparent from the above description, according to the first aspect of the present invention, the synthetic leather resin is subjected to washing in the shaving step of the leather tanned as the filler filler in a temperature range in which the fiber component does not disappear after washing. The synthetic leather sheet is manufactured by combining low-temperature drying and finely pulverized fine powder at 50-150 mepsises, thereby effectively using the characteristics of the leather without impairing the durability required for synthetic leather such as tensile strength. The moisture permeability can be improved to give the texture and feel of natural leather, and at the same time, various components impregnated in the tanning process are not leached onto the surface of synthetic leather to impair the quality.

On the other hand, according to the second aspect of the present invention, the water-moisture permeability is increased by using an additive formed by diluting the powder blended as filler for filling and the glue or gelatin formulated as a binder. It can increase the texture and feel of natural leather.

Furthermore, in such a structure, since the glue or gelatin used as the binder is diluted and dispersed and mixed, part of the glue is lost by performing hot water treatment to form a large number of pores in the form of natural leather, resulting in revolution within the resin. Since the leather-like tissue formed by the fiber component and the remaining glue and gelatin components communicate with the outside, similar physical properties can be imparted to the natural leather.

In addition, in the production of a synthetic leather formed by refining a top layer on the surface of a foam layer, not only the top layer has the texture and feel of natural leather, but also the bubble layer has the texture and feel of the natural leather. In addition, as a result of being able to configure the physical properties as a whole similar to natural leather, for example, the directionality to the tension is not seen in conventional synthetic leather appears.

In particular, vinyl chloride sheets have the disadvantage of being inferior in texture and feel due to extremely low moisture permeability compared to urethane-based sheets. However, vinyl chloride sheets have the advantages of being inexpensive and excellent in durability. Even if the resin is mainly used, it is possible to provide an improved synthetic leather having excellent moisture permeability. Moreover, there is an advantage that effects such as heat retention, water retention, conductivity, and aging resistance (prevention of plasticizer) are also added.

In addition, the sheet according to the present invention is blended 0.5-10% by weight of the additives obtained by dilution and dispersion of glue or gelatin in the synthetic leather, that is, the applicant separately filed as a glue or gelatin component in dry weight, It is also possible to use a laminate in combination with a synthetic leather sheet having a foamed or non-foamed layer formed by uniformly dispersing the glue or gelatin component.

Claims (6)

A filler for synthetic leather, characterized in that the tannery of the leather is low-temperature drying in the temperature range where the fiber component is not lost after the cleaning treatment, and finely ground in a 50-150 mesh pass. After washing the tannery of the tanned leather as a filler, it is dried at a low temperature in the temperature range where the fiber component is not lost, and the milled finely ground with a 50-150 mesh pass is applied to 100 parts by weight of the synthetic leather resin. A non-foamed synthetic leather sheet, which is blended by weight%, uniformly dispersed and molded into a sheet shape. The method of claim 2, wherein the finely pulverized powder is blended with 10-30% by weight based on 100 parts by weight of the synthetic leather resin, and the additive obtained by diluting the glue or gelatin as a binder is dried with respect to the synthetic leather resin. Non-foamed synthetic leather sheet, characterized in that the uniform dispersion by mixing 0.5-10% by weight. After washing the tannery of the tanned leather as a filler, it is dried at low temperature in the temperature range where the fiber component is not lost, and the finely ground milled with 50-150 mesh pass is blended with 100 parts by weight of the synthetic leather resin and foamed. A foamed synthetic leather sheet formed by molding. 5. The additive according to claim 4, wherein the finely pulverized powder is blended with 5-15% by weight based on 100 parts by weight of the resin for synthetic leather, and the additive obtained by diluting glue or gelatin as a binder is coated with 100 parts by weight of the resin for synthetic leather. A foamed synthetic leather sheet which is formed by mixing 0.5-10% by weight of gelatin by dry weight. In the synthetic leather sheet formed by film-setting the top layer on the surface of the foam layer, the foam layer is dried at a low temperature in a temperature range in which fiber components are not lost after washing the tannery of the tanned leather as a filler for filling, and 50-150 mesh 5-15% by weight of the finely ground crushed powder is blended with respect to 100 parts by weight of the synthetic leather resin, or the additive obtained by diluting the glue or gelatin as a binder is dried weight of the glue or gelatin with respect to 100 parts by weight of the synthetic leather resin. The top layer is a low-temperature drying in a temperature range in which the fiber component is not lost after washing the tannery of the tanned leather as a filler for the synthetic leather resin. 10-30% by weight of the finely ground fine powder in 50-150 mesh pass, based on 100 parts by weight of the synthetic leather resin, or as a binder or glue A synthetic leather sheet characterized by forming a film by mixing an additive obtained by diluting Latin with 0.5-10% by weight of glue or gelatin dry weight based on 100 parts by weight of a resin for synthetic leather.