JPH035110A - Leather-patterned molding and its molding method - Google Patents

Abstract

PURPOSE:To give a moisture absorbing function and moisture holding function to a film layer and possess a soft feel and soft matted hand, by a method wherein a film layer containing leather powder and possessing holes having fine and uniform hole diameters at uniform distribution density is provided on the surface of a molded product. CONSTITUTION:A polyurethane resin film layer 2 formed on the surface of a molded product 1 by an a appropriate method contains gelatin powder 3 and leather powder 4. The gelatin powder 3 is eluted by making use of water, warm water or hot water, the polyurethane resin film layer 2 is pierced by a large number of holes 5 and tunns into a porous polyurethane resin film layer having the leather powder 4. Since two-pack polyurethane resin possessing a curing agent having an unreacted isocyanate group at an end is reacted with an amine group, carboxyl group and OH group of the gelatin and eluation or extraction of the gelatin powder 3 is made difficult, the use of the same is not preferable. The polyurethane resin film layer 2 is formed with a thickness of about several to 30mum and the gelatin powder 3 which is not exceeding 25mum is used.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a molded product having a polyurethane resin film layer containing leather powder on its surface, which is provided with a large number of fine holes, and a method for molding the same. In this method, the finely powdered gelatin contained in the polyurethane resin film layer formed on the surface of the molded product is eluted or extracted using water, hot water, hot water, or a hydrophilic organic solvent, and the film layer is removed from the leather powder. The present invention relates to a porous leather-like molded article and a method for molding the same.

[Prior Art] Various molded products made of synthetic resins, wood, metal, etc. are coated with water-resistant or water-resistant coatings on the surface of the molded product for the purpose of protecting the surface of the molded product or increasing the visual value of the molded product. A wear-resistant paint film was formed, a color coating was applied, and a glossy or matte coating was applied.

In addition, various surface treatments are applied to synthetic resin molded products, wooden molded products, metal molded products, etc. with the intention of giving these molded products characteristics that they do not originally have individually. It had been applied.

In particular, attempts have been made to finish the surfaces of these molded products to resemble leather fabric, with the intention of improving the texture of these molded products and improving their texture.

The main purpose of this leather fabric-like finish is to provide the molded product with the luxury unique to leather, as well as to provide the molded product with functions similar to leather.

However, in the conventional surface treatment of leather-like molded products, the surface of the molded product is made leather-like by applying a false coating such as so-called vinyl leather, and then solidifying it by removing the solvent in water. However, if the molded product is bulky, it requires a large desolvation device, making it difficult to easily and evenly create a porous layer on the surface of the molded product. There was some difficulty.

In addition, the pores in the porous layer formed by such a method are
The pore diameters are not uniform, and it is difficult to set the pore distribution density uniformly, and furthermore, it has been considered unsuitable for forming pores with fine pore diameters. As a result, it remains difficult to provide the surface of the molded product with a delicate texture similar to that of leather fabric and functionality such as uniform moisture absorption.

In particular, for this type of porous molded layer, it is common to further form a polyurethane resin layer called a grain layer on top of the formed porous layer for the purpose of protecting the formed porous layer. Due to the formation of such a grain layer, many had the above-mentioned porous layer, and few had the moist texture characteristic of leather.

Therefore, after applying a polyester-based polyurethane resin solution diluted with dimethylformamide to the surface of the molded product, it is desolvated and solidified in ice, and after dehydration, it is dried using hot air to form microporous holes on the surface of the molded product. Attempts have been made to form layers.

In addition, natural leather is ground into fine leather powder, which is then blended and dispersed in a polyester-based polyurethane resin solution diluted with a diluting solvent of dimethylformamide and methyl ethyl ketone to produce molded products. Attempts have been made to form a leather-like layer containing fine leather powder on the surface of a molded product by applying it to the surface.

[Problems to be Solved by the Invention] Among the above-mentioned conventional examples, a resin solution obtained by diluting a polyester polyurethane resin with dimethylformamide is used as the surface of a molded product to provide a soft texture and moisture absorption. The inconvenience of spoiling the unique dry feeling is gone.

From this point of view, the surface skin layer containing leather powder has recently been developed because the leather powder itself retains the characteristics of natural leather. , which has characteristics that are closer to those of leather.

However, since the leather powder contained in the film layer formed on the surface of the molded product is divided into surface layers by the binder resin that forms the film layer, it is not flexible. There were difficulties in forming a tactile film layer.

Furthermore, the leather powder in the surface film layer formed by this method is often not covered with the binder resin that forms the film layer, and in particular, a thin skin layer made only of the binder resin is formed on the surface of the film. Unless it is removed by sanding or the like, the desired moisture absorption function cannot be achieved on the surface of the molded product.

The leather-like molded product according to the present invention and its molding method include a coating layer containing leather powder on the surface of the molded product, and having fine pores of several microns and a uniform pore size with a uniform distribution density. By providing a moisture absorption function that provides an appropriate feeling of trying, and a moisture retention function that provides an appropriate moist texture.
To provide a film-like molded product which imparts the M function to the film layer and has a soft texture due to countless fine pores and a soft/J matte texture; The purpose is to provide easy molding methods for similar molded products.

[Means for Solving the Problems] In order to achieve the above objects, the film-like molded product and the method for molding the same according to the present invention, The polyurethane resin film layer containing gelatin powder and leather powder is used to dissolve all or part of the gelatin powder contained in the polyurethane resin film layer using water, hot water, or hot water. A leather-like molded article is obtained by forming a porous polyurethane resin leather layer containing leather powder on the surface.

Furthermore, the invention of claim 3 provides for forming a polyurethane resin film layer containing gelatin powder and leather powder on the surface of the molded article by a coating method, and then forming a polyurethane resin film layer containing gelatin powder and leather powder by a coating method. Add all or part of the gelatin powder to water,
Porous leather powder is formed on the surface of the molded product by dissolving and removing it using warm or hot water, or by extracting it using an organic solvent with a low molecular weight that is easily miscible with water and does not dissolve the polyurethane resin. A leather-like molded product is formed by forming a polyurethane resin film layer having the following properties.

[Example] Typical examples of the leather-like molded article according to the present invention will be described below with reference to the accompanying drawings.

In Figure 1, 1 is an enlarged view of a part of the molded product, and although this molded product is a synthetic resin molded product, it is a wooden molded product that easily dissolves or mixes with water. Moreover, the polyurethane resin is extracted using a low molecular weight organic solvent that does not dissolve it, and the film layer on the surface of the molded product is made into a porous leather-like molded product 17 containing leather powder.

Next, the invention of claim 2 is such that a thin film that will become the surface coating layer of the molded product is prepared in advance on the mold surface of the molded product, and an appropriate molding resin is injected into the mold and filled by means of a press-fitting cap. In the method of obtaining a molded article having a polyurethane resin layer on the surface thereof, the thin film formed on the mold surface of the mold is formed by coating the mold surface with a polyurethane resin liquid or resin solution containing gelatin powder and leather powder. Then, a polyurethane resin film layer containing gelatin powder and leather powder is created on the surface of the molded product, and all or part of the gelatin powder contained in this polyurethane resin film layer is dissolved in water, hot water, or hot water. Alternatively, it can be extracted using an organic solvent with a small molecular weight that is easily miscible with water and does not dissolve the polyurethane resin, or it may be a metal molded product, and there are no restrictions on the shape or material of the molded product. .

2 is a polyurethane resin film layer formed on the surface of the molded article 1 by an appropriate method, and contains gelatin powder 3 and leather powder 4 having fine particle diameters.

Next, FIG. 2 shows that the gelatin powder 3 contained in the polyurethane resin film layer 2 formed on the surface of the molded article 1 is eluted using water, hot water, or hot water, and this polyurethane resin film is removed. A large number of pores 5 are formed in the layer 2 to form a porous polyurethane resin film layer containing leather powder.

Another method is to impregnate the polyurethane Δ4 resin film layer 2 with an organic solvent having a small molecular weight such as methyl alcohol, which dissolves the polyurethane resin, and which is easily soluble in water. By immersing the polyurethane resin film layer 2 in water, the gelatin powder 3 in the polyurethane resin film layer 2 is extracted, and a large number of holes 5 are formed in the polyurethane resin film layer 2 containing leather powder.

FIG. 3 shows that when the gelatin powder 3 contained in the polyurethane resin film layer 2 containing the leather powder 4 is eluted or extracted by the above method, a part of it is not eluted or extracted and the gelatin 3° remains. Indicates the case where

There are various methods for forming the polyurethane resin film layer 2 on the surface of the molded product 1, depending on the shape, characteristics, etc. of the molded product, and the thickness of the polyurethane resin film layer 2 to be formed.

One method according to the invention of claim 2 is to form a polyurethane resin film containing gelatin powder and leather powder on the mold surface of the mold, which will become the surface film layer of the molded product 1, and then mold the mold with gelatin powder and leather powder. A molded article having a polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4 on the surface is obtained by filling the molding resin with an appropriate molding resin using a means of injecting or press-fitting a ring and curing it. A thin film 2'' of polyurethane resin containing leather powder 4 is formed.This thin film 2 of polyurethane resin is applied to the mold surface 6a by spraying, coating, brush molding, slush or rotational molding, etc. Prepare to form to desired thickness.

This thin film 2° may be formed in one layer or in multiple layers. Further, after forming the thin film 2' containing this gelatin powder 3 and leather powder 4 on the mold surface 6a, and further layering another synthetic resin layer that does not contain gelatin powder on this formed thin film 2', Molded product 1 having multiple surface coating layers with different properties by filling the mold 6 with molding resin
It's good as well.

The molded product 1 molded in this manner has a top surface layer portion as a polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4. The gelatin powder 3 is eluted using water, hot water, or hot water, and a polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4 is formed on the surface of the molded product 1 using a gelatin mold. Molding can be performed by various methods such as general injection molding, transfer molding, injection molding, etc., as well as slush molding and rim molding. used.

FIG. 4 shows an example of molding a steering wheel using such a mold, and the mold surface 6a of the mold 6.6
A thin film 2'' of polyurethane resin containing gelatin powder 3 and leather powder 4 is pre-molded on the surface of the mold 6. After setting the iron core 7, the mold 6.6 is closed, and the molding resin 8 is filled and hardened. After that, the steering wheel is obtained by removing the mold.

5 to 7 are enlarged cross-sectional views showing a method for molding the molded product 1 using the mold 6. First, gelatin powder 32 is eluted onto the mold surface 6a of the mold 6. A hole 5 is formed in the removed portion.

Alternatively, an organic solvent that does not dissolve the polyurethane resin which is the binder of the polyurethane resin film layer 2, and which has a low molecular weight and has good solubility in water, such as methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, etc. may be used. Polyurethane resin film layer 2
This polyurethane resin film layer 2 is immersed in water in a swollen state, gelatin powder 3 contained in the polyurethane resin film layer 2 is extracted into the water, and holes 5 are formed in the polyurethane resin film layer 2.

Next, the method for molding a molded article according to the invention of claim 3 is to directly apply and form a polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4 on the surface of the molded article. The thickness and width of the polyurethane resin film layer 2, the number of laminated layers, etc. are determined depending on the intended use of the molded product and the characteristics required of the surface of the molded product.

The coating and formation of this polyurethane resin film layer 2 can be carried out by applying a polyurethane resin liquid or solution containing gelatin powder 3 and leather powder 4 to the inside of the shell by methods such as brushing, rolling, gravure, offset, etc., or by spraying. Hanging, molded product 1
is formed by a method such as dipping in these liquids or solutions.

It should be noted that the molded product 1 may be of any shape and of 4J quality, as long as the polyurethane resin film layer 2 is coated and formed, and it is not limited to plastic molded products.
Includes metal molded products, wooden molded products, etc. Alternatively, a cloth or the like may be pasted onto the surface of the molded article 1, and the polyurethane resin film layer 2 may be applied and formed on the surface of the cloth or the like. Furthermore, a base layer such as a wet microporous layer of polyurethane resin may be formed on the surface of the molded product, and the polyurethane resin film layer 2 may be applied and formed in a laminated manner on this base layer.

From the polyurethane resin film layer 2 coated and formed on the surface of the molded article 1 in this way, the gelatin powder 3 has an amine group and a carboxyl group at its end 3j76. It is preferable to use a polyurethane resin that does not have an isocyanate group at the end that reacts with an amine group or a carboxyl group.
In particular, a corrugated polyurethane resin having an unreacted incyana-1 group at the end reacts with the incyanato group at the end or the amine group or carboxyl group of gelatin to form coexisting bonds.
Polyurethane resin film layer 2 formed by becoming insoluble in water
F) It is not preferable to use it because it makes it difficult to elute or extract the gelatin powder 3, and care must be taken when using it.

Furthermore, when a large amount of gelatin powder 3 is mixed with a two-component polyurethane resin having unreacted incyanato groups, the terminal carboxyl groups and amine groups of gelatin react with the incyanato groups, resulting in the formation of polyurethane resin. May interfere with curing and may be unsuitable for use.

On the other hand, the gelatin powder is eluted or extracted by the method of unreacted isocyanana at the end, and countless pores 5 are formed in the polyurethane resin film layer 2 containing the leather powder 4.

Next, the polyurethane resin film layer 2, gelatin powder 3, and leather powder 4 as binders used in each example, and the method of elution or extraction of the gelatin powder 3 will be explained in more detail.

First, the polyurethane resin film layer 2 will be supplementarily explained. The resin film layer formed on the surface of this molded article is a polyurethane resin film because it is necessary to provide film strength, weather resistance, etc., as well as specific flexibility, abrasion resistance, etc. to the film layer. This polyurethane resin film is preferably made of polyester polyurethane, polyether polyurethane, polycaprolactone polyurethane, polycarbonate polyurethane, silicone-modified polyurethane, amino acid-modified polyurethane, polyamide-modified polyurethane, or the like.

6. For polyurethane resins that do not have a t group, especially polyurethane resins that have an OH group that does not react with gelatin at the end, the gelatin powder 3 is removed from the polyurethane resin film layer 2 formed including the gelatin powder 3. can be easily removed without being eluted or extracted. Further, the pinter function of this polyurethane resin film layer 2 is not impaired by the mixing of gelatin powder 3.

The polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4 formed on the surface of the molded article 1 is formed to have a thickness of several microns (hereinafter referred to as .mu.m) to about 30 .mu.m. The thickness of the polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4 is determined by the surface characteristics required for the film layer of the molded product.
It is preferable to form it to a thickness of around μm.

In addition, when the polyurethane resin film layer 2 containing the gelatin powder 3 and the leather powder 4 is formed into multiple layers, the lower layer is made of 20
~30 μm, coat the surface 1 ~ 1 layer with gravure coating etc.
It is preferable that the thickness be less than 0 μm.

Furthermore, a wet microporous layer of polyurethane resin J resin is formed on the surface of the molded product 1, and a polyurethane resin film of several microns to about 30 μm containing gelatin powder 3 and leather powder 4 is formed on the surface of the wet microporous layer of polyurethane resin. Form layer 2.

In addition, with a cloth or the like pasted on the surface of the molded product 1, a synthetic resin serving as a heath is applied to the surface of the cloth to form a reinforcing base layer, and gelatin powder 3 and leather powder are applied to the surface of this reinforcing base layer. A polyurethane resin film layer 2 of several microns to about 30 μm including 4 is formed.

Note that the polyurethane resin film layer 2 formed on the surface of the molded product 10 may be integrally laminated on the surface of the molded product 1 by applying it to the surface of the molded product 1 or by bonding a film or the like. Also, when molding the molded product 1, it may be formed simultaneously with the molding of the molded product 1.

9 Prepare to form a thin film 2° of urethane resin, and fill the molding resin 8 into the mold of this molded product 1 by an appropriate method such as injecting or press-fitting, so that gelatin powder 3 and leather powder are formed on the surface of the molded product 1. A polyurethane resin film layer 2 containing 4 is formed.

The polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4 formed on the surface of the molded article 1 is subjected to treatments such as sanding and sandblasting. This sandeng,
The surface skin layer of the polyurethane resin film N2 on the surface of the molded product 1 is removed by sandblasting or other processing, and a portion of the gelatin powder 3 and leather powder 4 contained therein is exposed. Elution or extraction of the gelatin powder 3 with water or the like becomes easy and reliable, and the surface has the characteristics of the leather powder 4 in a preferable state.

Further, due to such surface treatment, the surface of the polyurethane resin film layer 2 becomes uneven, giving it a soft texture and a matte texture.

The coating and formation of the polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4 can be done by any coating method used inside the shell, such as spraying with a spray gun, brushing, roll coating, etc. Any method of forming a resin coating film may be used.

In addition, when forming the polyurethane resin film layer 2 containing gelatin powder 3 and leather powder 4 on the surface of the molded product 1 by adhesion,
A polyurethane resin laminate film containing gelatin powder 3 and leather powder 4 is prepared, and this laminate film is directly adhered to the surface of the molded article 10 by heat fusion or by using an adhesive.

Furthermore, as a method for forming the molded product 1 at the same time as the molding, when the molded product 1 is a synthetic resin molded product, gelatin is added to the surface of the molded product 1 before the surface of the molded product 1 is hardened. A polyurethane resin film containing powder 3 and leather powder 4 is transferred and adhered, or a polyurethane resin film containing gelatin powder 3 and leather powder 4 is preliminarily applied to the mold surface of molded product 1. . The gelatin powder 3 contained in this polyurethane resin film layer 2 is 25
A material smaller than μm is used. It is necessary to adjust the particle size of the gelatin powder 3 according to the thickness of the polyurethane resin film layer 2 to be formed. Ideally, there is. The finer the particle size of the gelatin powder 3 included in the polyurethane resin film layer 2, the more fine pores 5 can be formed in the polyurethane resin film layer 2. Therefore, when it is necessary to form finer pores 5 in the polyurethane resin film layer 2, gelatin powder 3 included in the polyurethane resin film layer 2
The particle size is adjusted within a finer range and used.

The finer the pores 5 formed in this polyurethane resin film layer 2, the softer and moister the skin will be.
This provides the polyurethane resin film layer 2 with a smooth dry feel and a leather-like texture. This makes it ideal for GJ3
It is preferable to use gelatin powder 3 of around μm.

However, if the gelatin powder contained in this polyurethane resin film layer 2 has a fine particle size of less than 3 to 14 m (μJ), it may elute from this polyurethane resin film layer 2,
It is difficult to extract it, and it may remain in this polyurethane resin film layer 2.

Therefore, the gelatin powder 3 included in the polyurethane resin film layer 2 should ideally have a particle size of 1 μm or more, and moreover, it should be of a finer particle diameter of 9 μm.

From this point of view, it is preferable to use pulverized gelatin obtained by classifying and pulverizing gelatin with a molecular weight as low as 16.00 [1,1:1] using a dry pulverization method such as a jet mill. In particular, the molecular weight is less than 10,000, ideally 1. ODD~5
,000 molecular weight is dry-pulverized, crushed, and then air-classified to prevent the sedimentation of gelatin powder 3 when mixed with a urethane resin solution or an organic solvent for dissolving polyurethane resin. be able to.

Furthermore, by using gelatin with a low molecular weight of less than 16,000, the gelatin powder 3 can be easily eluted or extracted from the polyurethane resin film layer 2 formed on the surface of the molded article 10.

In this way, there is gelatin powder from which fine and even ultra-fine parts are effectively removed, and the molecular weight is small and R
It is preferable to use gelatin powder that has been pulverized by dry pulverization using a jet mill or the like while being classified by weight classification.

Next, leather powder 4 will be additionally explained. The leather powder 4 used for sawing is prepared as a fine powder obtained by crushing natural leather.

The leather powder included in the polyurethane resin film layer 2 has a specific gravity of 0.38 to 050 g/cc per day.
A fine powder having a water content of less than 3% by weight is preferred. Also, the particle size of gelatin powder in leather powder 4 is approximately 3 μm.
It is possible to collect gelatin powder in the front and back, and furthermore, it is possible to extremely reduce the amount of gelatin powder with a particle size of 10 μm over and 1 μm under.

In order to obtain gelatin powder 3 having a certain distribution range in this way, it is necessary to classify and then crush the gelatin powder 3.
Normally, true specific gravity classification is performed using an air volume classifier. In order to perform the air volume classification of the gelatin powder 3, it is necessary to pulverize the gelatin powder 3 by dry pulverization using a jet mill or the like.

However, when gelatin with a molecular weight of 1.6,000 or more is pulverized using a dry pulverization method such as a shet mill, the pulverization efficiency is extremely poor, and the gelatin itself may be denatured due to long-term pulverization. Molecular weight is 16,00
Preferably, milling is performed using less than 0 gelatin.

By using low-molecular-weight gelatin with a molecular weight of less than 16,000, the gelatin powder 3 can be mixed with a polyurethane resin liquid and the diluted poly 4 can have a thickness of several microns to 30 μm depending on the thickness of the polyurethane resin film layer to be formed. Something is preferable.

Leather powder 4 included in polyurethane resin film layer 2
The apparent specific gravity is 0.38 to 0.50 g/cc, and the fact that the water content is adjusted to be less than 3% by weight is one of the reasons for efficient grinding of leather powder 4. Another reason may be that it is uniformly dispersed in the polyurethane resin.

When the leather is simply broken functionally, the leather is not ground into powder but often becomes fibrous, and the broken fibrous leather powder becomes intertwined with each other and aggregates into a flocculent form. Therefore, when leather powder having a low specific gravity is used, there is a problem that it is not uniformly dispersed in the polyurethane resin.

Furthermore, it has been found that when the leather has a moisture content above a certain value, the grinding efficiency is poor in terms of GI.

Therefore, the leather powder 4 to be mixed and dispersed in the polyurethane resin was designed to have a high apparent specific gravity and a moisture content of less than 3% by weight.

The leather powder 4 is made by steaming the leather while swelling it with steam,
Moisture content is 3% by weight when the leather tissue is loosened.
It is preferable to dry the leather powder so that it is less than 100%, and then re-pulverize the leather powder obtained by dry-pulverizing in this dry state by wet-pulverizing using dimethylpolamide as a medium.

Leather powder crushed under these conditions appears to have a high specific gravity of 0.
．． 38 to 0.50 g/cc, and the moisture content of the leather powder in dimethylformamide can be maintained at 3% by weight.

In this way, the leather powder contained in dimethylformamide is uniformly dispersed in this dimethylformamide, and when dimethylformamide containing this leather powder is mixed with an organic solvent such as polyureatol, Gelatin powder 3 and leather powder 4 are blended and stirred to dissolve or dilute the polyurethane resin using a mixed organic solvent to obtain gelatin powder 3.
and leather powder 4 are dispersed and blended into a polyurethane resin.

Alternatively, gelatin powder 3 and leather powder 4 are dispersed in the polyurethane resin solution by directly blending and stirring into the polyurethane resin solution.

When blending and dispersing gelatin powder 3 in an organic solvent for dissolving polyurethane resin, or blending and dispersing polyurethane resin liquid or polyurethane resin solution, the moisture content of gelatin powder 3 should ideally be less than 10% by weight. is 8
Less than % by weight. If the amount of water contained in the gelatin powder 3 exceeds 10% by weight, the gelatin powder 3 tends to fuse with each other during blending and stirring and not be dispersed in the liquid. Also, even in the case of gelatin powder 3 containing 8 to 9% water by weight, by continuing stirring for a long time, the gelatin powder 3 will fuse together and be uniformly dispersed in the dilute solution of liquid tongue resin. do.

Moreover, since the moisture content in the leather powder contained in this polyurethane resin is less than 3% by weight, the moisture in this leather powder does not interfere with the formation of the polyurethane resin film layer.

From this point of view, the leather powder included in the polyurethane resin film layer has an apparent specific gravity of 0.38 to 0.50 g/cc.
Moreover, it is preferable that the water content is adjusted to less than 3% by weight.

Next, the inclusion of gelatin powder 3 and leather powder 4 in polyurethane resin film layer 2 will be supplementarily explained. When the gelatin powder 3 and the leather powder 4 are included in the polyurethane resin film layer 2, the polyurethane resin is usually mixed in a solution diluted with an organic solvent, for example, an organic solvent for dissolving a hydrophilic polyurethane resin such as dimethylformamide. Stir to disperse. Or a hydrophilic polyurethane resin-dissolving organic solvent such as dimethylformamide, or a tendency to separate methyl ethylke 8 from the hydrophilic organic solvent such as dimethylformamide.

Therefore, it is preferable that the water content of the organic solvent for dissolving the polyurethane resin, the polyurethane resin solution, or the gelatin powder stirred and blended into the polyurethane resin liquid is less than 8% by weight.

Furthermore, among the gelatin powders 3 stirred and blended with dimethylformamide etc., gelatin powders with a molecular weight of 16,000 or more tend to settle over time, whereas 16,
Gelatin powder with a molecular weight smaller than 0.000 maintains a suspended state with less sedimentation over time after stirring and blending. Therefore, it is preferable to use a gelatin powder 3 having a molecular weight of 16,000 or less, ideally a molecular weight smaller than 10,000.

Next, the blending amounts of gelatin powder 3 and leather powder 4 contained in the polyurethane resin film layer 2 are adjusted according to the surface characteristics of the polyurethane resin film layer 2 to be formed, and in particular, by increasing the amount of gelatin powder 3, the polyurethane The formation density of the pores 5 formed in the resin film layer 2 is uniform, and moisture absorption properties that give a dry feeling, moist moisturizing properties, and a soft matte texture are more effectively produced. However, gelatin powder 3 and leather powder 4 included in the polyurethane resin film layer 2
When the amount of .

Furthermore, if the blended amounts of gelatin powder 3 and leather powder 4 contained in the polyurethane resin film layer 2 are small, the above-mentioned leather-like properties required of the polyurethane resin film layer 2 will not be sufficiently achieved.

Gelatin powder 3 contained in this polyurethane resin film layer 2
When the amount is 20 parts by weight per 100 parts by weight of the solid part of the polyurethane resin and 4 parts by weight of Leather Powder 4, the surface of the formed film layer retains the gloss characteristic of resin molded products and is free from overhumidity. Sometimes it feels sticky, and when dry, 30 to 120 parts by weight of gelatin powder, ideally 70 parts by weight, is blended, and 5 to 70 parts by weight of leather powder 4, ideally. It is preferable to form the polyurethane resin film layer 2 by blending 30 parts by weight with.

Next, a supplementary explanation will be given of the molded product to be molded.

First, a release agent such as wax or soap is applied to the surface 6a of the mold 6, and then a polyurethane resin liquid or a resin solution containing gelatin powder 3 and leather powder 4 is applied by spraying or using a brush. A thin film 2' having a thickness of 10 to 30 μm is formed.

This polyurethane resin thin film 2° contains gelatin powder 3 in the range of 30 to 120 parts by weight and leather powder 4 in the range of 5 to 70 parts by weight based on 100 parts by weight of the solid content of the polyurethane resin.
It is preferable to use a mixture of the above. If the amount of gelatin powder 3 and leather powder 4 contained in the polyurethane resin coating liquid that forms this N-film 2 is too small, the molded article 1 formed will have a slippery feel and have leather-like properties. It was hardly recognized.

The polyurethane resin film layer 2, which contains 30 parts by weight of gelatin powder 3 and 5 parts by weight of leather powder 4 for 100 parts by weight of the solid part of the urethane resin, has less luster, which is characteristic of resin molded products. Moist moisture retention and dry hygroscopicity were observed, and this tendency became more pronounced as the amount of gelatin powder 3 and leather powder 4 added to the solid content of the polyurethane resin was increased.

However, if the amount of gelatin powder 3 is 120 parts by weight or more and the amount of leather powder 4 is 70 parts by weight or more with respect to 100 parts by weight of the polyurethane resin solid content, the function of the polyurethane resin as a binder will be lost. It was observed that the formed polyurethane resin film layer 2 became extremely brittle.

Therefore, 100 parts by weight of the solid content of the polyurethane resin forming the polyurethane resin film layer 2 does not provide sufficient moisture absorption and moisturizing functions to the polyurethane resin film layer 2, and the surface layer of the molded product has a soft matte texture. It cannot be brought to 1. Moreover, when the blending amount of gelatin powder 3 and leather powder 4 is increased, the function of the polyurethane resin as a binder for the mold surface is lost, and the polyurethane resin film layer 2 formed on the surface of the molded product 1 tends to become brittle. shows.

From this point of view, the amounts of gelatin powder 3 and leather powder 4 contained in the polyurethane resin thin film 2' formed on the mold surface 6a are:
Similar to the above formulation example, the solid content of polyurethane resin is 100%.
It is preferable that the amount of gelatin powder 3 is 30 to 120 parts by weight and the leather powder 4 is 5 to 70 parts by weight, and particularly ideally 70 parts by weight of gelatin powder and 30 parts by weight of leather powder.

It is preferable to use a polyurethane resin that does not have unreacted isocyanate groups at the end of the coating liquid for forming this thin film of polyurethane resin, and it is particularly preferable to use a wave-shaped polyurethane resin coating liquid. . On the other hand, when a two-component polyurethane resin coating solution having unreacted isocyanate groups at the ends as a curing agent is used, these unreacted isocyanate groups and the amine groups and carboxyl groups of gelatin powder 3 As a result of the reaction, the polyurethane resin of the coating film does not sufficiently function as a binder, and the surface properties such as abrasion resistance of the polyurethane resin thin film 2° formed are impaired. In addition, the gelatin powder 3 contained in the two-component polyurethane resin coating solution having unreacted isocyanate groups may react with the incyanato groups of the polyurethane resin coating solution and lose its solubility in water. Care must be taken when using the product under conditions of deterioration.

A polyurethane resin coating solution containing gelatin powder 3 and leather powder 4 is used as a solution diluted with a hydrophilic organic solvent such as dimethylformamide. Therefore, it is difficult to use a water-miscible polyurethane resin such as dimethylpolamide in a dissolved organic solution.Dimethylacetamide is more expensive than dimethylboramide, and N-methyl-
Since 2-pyrrolidone has a high boiling point and is difficult to work with, dimethylformamide was used in the examples.

After forming the polyurethane resin film layer 2 on the surface 6a of the mold 6 in this way, the mold is clamped and the molded resin 8 is placed inside the mold 6.
Fill it. There are various methods for filling this molding resin 8 depending on the shape of the molded product, the characteristics of the molding resin, the type of mold, etc.
Basically, there are press-fitting and injection methods.

Typical methods include injection molding using a metal mold, transfer molding, slush molding, and injection molding using various molds. Since each of these has a mold for molding, a thin film of polyurethane resin of 2° can be formed in advance on the surface of the mold.

The resin to be injected or press-fitted into the mold 6 is made of polyethylene, polypropylene, and a binder to create an organic solvent in which gelatin powder 3 and leather powder 4 are suspended, and this is used to form a polyurethane resin. Gelatin powder 3 is added to a polyurethane resin solution that has been dissolved or diluted to form a coating solution or dissolved or diluted with a water-miscible organic solvent such as dimethylformamide.
and leather powder 4 to form a coating liquid.

The polyurethane resin film layer 2 formed on the surface of the molded article 1 by using such a water-miscible organic solvent contains leather powder 4 in a uniformly dispersed state, and this polyurethane resin film layer 2, the gelatin powder 3 contained therein can be easily and reliably eluted or extracted.

In addition to dimethylformamide, dioxane, tetrahydrofuran, dimethylacetamide, N-methyl-2-pyrrolidone, etc. can be used as organic solvents for dissolving the water-miscible polyurethane resin used in sawing. Dioxane and tetrahydrofuran have low boiling points. 6 Reacetal, polyamide, polyurethane, PVC, A
Materials suitable for molding the molded article 1, such as BS and polyester, are used.

Note that the resin having unreacted incyanato groups and ivoxy groups that react with the amine groups and carboxyl groups at the ends of the gelatin powder 3 reacts with the gelatin powder 3 contained in the polyurethane resin film layer 2 formed above. However, this is not preferable because it interferes with the water solubility of the gelatin powder 3, and care must be taken when using it.

In the case of a resin that uses a curing agent or the like having a group at its end that reacts with gelatin powder, it is preferable to inject the molding resin 8 by a rim molding method or the like.

For example, a mixture of polyol, crosslinking agent, catalyst, and blowing agent is used as liquid A, and isocyanate is used as liquid B, and liquids A and B are collision-mixed using a mixing head and then injected into a mold. The molded product is molded while preventing the reaction between the isocyanate and the isocyanate.

The molded article 1 formed by injecting or press-fitting the molding resin 8 into the mold 6 has a polyurethane resin film layer 2 consisting of the thin film 2' on its surface, and this polyurethane resin film layer 2 Nisundeng treatment or Zantblast treatment is applied as necessary.

In addition, when the polyurethane resin film layer 2 formed on the surface of the molded product 1 is multilayered, after coating the surface 6a of the mold 6 with a thin film of 2° in multiple layers, the molding resin 8 is filled into the mold 6. and form it.

Next, the coating film formed on the surface of the molded product 1 will be supplementarily explained. The polyurethane resin film layer 2 made of this paint film can be formed particularly thinly by a gravure coating method, or thickly by a roll method. Convenient or good.

This polyurethane resin film layer 2 preferably uses 30 parts by weight of resin per 100 parts by weight of polyurethane resin solid content.

In particular, if there is a large amount of gelatin powder (3C) mixed in the polyurethane resin coating liquid with unreacted incyanato groups, the isocyanate groups in the polyurethane resin coating liquid and the amine groups and carboxyl groups of the gelatin powder 3 The polyurethane resin in the coating film will not function as a binder, and will react.
The surface properties such as abrasion resistance of the polyurethane resin film layer 2 formed will be impaired. In addition, the gelatin powder 3 contained in the two-component polyurethane resin coating solution having unreacted isocyanate-1 groups reacts with the isocyanate groups of the polyurethane resin coating solution, increasing its solubility in water. Its use is undesirable, and care must be taken when using it.

The polyurethane resin coating liquid containing gelatin powder 3 and leather powder 4 contains Shimedilformamide 1, which is a hydrophilic organic solvent.
- Use as a diluted solution. Therefore, a water-miscible polyurethane resin such as Dimedylporumami] dissolved in an organic solvent part to 120 parts by weight of gelatin powder 3 and 5 to 70 parts by weight of leather powder 4 were blended to form a polyurethane resin coating liquid. do. Gelatin powder contained in this polyurethane resin coating liquid 3
If the blending amount of the leather powder 4 and the leather powder 4 is small, the formed polyurethane resin film layer 2 will not have sufficient moisture absorption and moisturizing functions, and moreover, a film with a soft matte texture cannot be obtained. Moreover, when the blending amount of gelatin powder 3 and leather powder 4 is increased, the binder function as a coating liquid is impaired, and the polyurethane resin film layer 2, which is a coating film, does not have sufficient properties such as abrasion resistance. will no longer be affected. From this point of view, it is ideal that the gelatin powder 3 contained in the coating solution forming the polyurethane resin film layer 2 should be 70 parts by weight and the leather powder 4 should be 30 parts by weight based on 100 parts by weight of the solid content of the polyurethane resin coating solution. It is true.

The polyurethane resin coating liquid forming this polyurethane resin film layer 2 is prepared by preparing an organic solvent in which gelatin powder 3 and leather powder 4 are suspended using polyurethane 0 which does not have unreacted isocyanate groups at the terminals. Use this to dissolve or dilute polyurethane resin to form a coating solution, or add gelatin powder 3 and leather to a polyurethane resin solution that has been dissolved or diluted with a water-miscible organic solvent such as Shimedil Porumami. Powder 4 is mixed to form a coating liquid for use.

By using such a water-miscible organic solvent, the polyurethane resin film layer 2 coated and molded on the surface of the molded article 1 has leather powder 4 uniformly dispersed therein, and the polyurethane resin film layer 2 has leather powder 4 uniformly dispersed therein. 2, the gelatin powder 3 contained therein can be easily and reliably eluted or extracted.

In addition to the above dimethylformamide, dioxane, tetrahydrofuran, shimedylacetamide, N-methyl-
2-Pyrrolidine, etc.\Dioxane and tetrahydrofuran are difficult to use due to their low boiling points, dimethylacetamide is more expensive than dimethylformamide, and N-methyl-2-pyrrolidone has a high boiling point. In the Examples, dimethylformamide was used as a diluting solvent during coating because of its difficulty in workability.

The polyurethane resin film layer 2 thus coated and formed on the surface of the molded article 1 is subjected to appropriate surface treatments such as sanding and sandblasting.

Next, the method of elution and extraction of the gelatin powder 3 contained in the polyurethane resin film layer 2 will be supplementarily explained.

In order to elute all or part of the gelatin powder 3 contained in this polyurethane resin film layer 2, wash the polyurethane resin film layer 2 in the molded article 1 with water or warm water or hot water, and wash this polyurethane resin film layer 2 with water or warm water or hot water. Dissolve and wash out the gelatin powder 3 contained in 2. Alternatively, the polyurethane resin coating layer 2 is immersed in water, hot water, or hot water, and the polyurethane resin 3 is also influenced by the molecular weight of the latin powder 3.

From this point of view, the elution IA of the gelatin powder 3 into the polyurethane resin film layer 2 of the molded article 1 is as follows.
The properties of the polyurethane resin film layer 2, the properties of the molded product 1, etc., and the polyurethane resin film layer 2.
It is preferable to decide the temperature of the treated water, immersion time, elution method, etc. after comprehensively considering the amount of gelatin powder 3 to be eluted from the water.

In contrast to the elution method of gelatin powder 3 that uses water, hot water, or hot water, an organic material with good solubility in water and a small molecular weight is After impregnating the polyurethane resin film layer 2 with a solvent, the gelatin powder 3 contained in the polyurethane resin film layer 2 may be extracted by immersing the polyurethane resin film layer 2 in water.

The organic solvent used in this method removes the polyurethane resin film layer 2 on the surface of the molded article 1 by dissolving the gelatin powder 3 of the fat film layer 2 to form the holes 5.

The higher the temperature of the water, warm water, or hot water used in the milling, the shorter the time required for elution of the gelatin powder 3, but this may impair the properties of the molded article 1 or the polyurethane resin film layer 2.

Therefore, the immersion time and the temperature of the treated water required for elution of the gelatin powder 3 are set in accordance with the properties of the molded article 1 and the polyurethane resin film layer 2.

Further, it is also possible to leave a portion of the gelatin powder 3 contained in the polyurethane resin film layer 2 as 3° of residual gelatin without eluting all of it.

The residual gelatin 3' left in the pores 5 in this manner provides the polyurethane resin film layer 2 on the surface of the molded article 1 with unique moisture absorbing and moisturizing properties together with the leather powder 4.

In addition, the time required for elution of the gelatin powder 3 is determined by using an organic solvent that does not dissolve the gelatin powder 4 contained in the polyurethane resin film layer 2 or have a negative effect on it, and has good solubility in water. It is preferable to use methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, acetone, etc. whose molecular weight is less than about 80.

The organic solvent used makes the polyurethane resin film layer 2 swollen, and the gelatin powder 3 forms the polyurethane resin film layer 2 in a state where it is easy to remove with a space created by the swelling between the gelatin powder 3 and the swollen polyurethane resin film layer 2. It is included in layer 2.

Therefore, when the polyurethane resin film layer 2 that has been swollen with this organic solvent is immersed in water, the organic solvent that has swollen the polyurethane resin layer 2 moves toward the immersion treatment water, and moreover, due to water pressure, Since the polyurethane resin film layer 2 in a swollen state is compressed,
Gelatin powder made easy to extract with the above-mentioned organic solvent 3
is extracted into water, and during immersion in this water, the polyurethane resin film layer 2 is subjected to a rolling treatment, and is subjected to a pressure treatment with a roll or the like, or an ultrasonic vibration treatment to form the gelatin powder 3. It is preferable to make the extraction more reliable and easy.

The polyurethane resin film layer 2 from which the gelatin powder 3 has been extracted in this way is washed out with water so that the organic solvent does not remain on the polyurethane resin film layer 2.

Also, there is! The l&solvent may not be used as it is in the S state, but may be diluted with water and used as an aqueous solution with a concentration of 25% or more. In the case of acetone, a 5% aqueous solution can also be used.

By diluting such an organic solvent with water, the amount of organic solvent used can be reduced and the cost required for extracting gelatin powder 3 can be reduced, and the organic solvent that is difficult to handle can be diluted. The thin film was made of 70 parts by weight of a gelatin/leather powder dispersion of Dimedylborum Ado containing 100 parts by weight of a dry urethane resin solution with a solid content (non-volatile content) of 30% by weight, 21 parts by weight of gelatin powder and 9 parts by weight of leather powder. A mixed solution was prepared, and this mixed solution was sprayed onto the mold surface of a rim mold using a spray gun so as to have a film thickness of 10 to 20 μm.

In addition, the gelatin powder that was not included in the thin film was 90.8% by weight of the total gelatin powder or celadin powder with a particle size of less than 8 μm and 1 μm or more, and in particular, the gelatin powder had a particle size of less than 8 μm and more than 1 μm. The gelatin powder used was only 0.1% by weight of the total amount of gelatin powder.

The leather powder included in this thin film had an apparent specific gravity of 0.45 g/cc, a water content of 25% by weight, and most of the leather powder was less than 12 μm in diameter. This leather powder is made easier to handle by drying and pulverizing the leather after steaming it, and making the pulverized leather powder into a wet hole aqueous solution using dimethylpolamide as a medium.

Polyurethane resin film layer 2 is formed using such an organic solvent.
When the gelatin powder 3 contained in the polyurethane resin film layer 2 was extracted by swelling the polyurethane resin film layer 2, many well-shaped holes 4 were formed after the gelatin powder 3 was extracted.

The surface of the polyurethane resin film layer 2 on the surface of the molded article 1 from which the gelatin powder 3 has been extracted is subjected to a sanding treatment, a huffing treatment, a sandblasting treatment, etc., and a top skin layer is further formed by a gravure coating method or the like.

In addition, general surface treatments such as embossing, graining, and coloring are performed.

Example 1 A silicone-based mold release agent was sprayed onto the mold surface of a rim mold for a handle to a thickness of about 5 μm using a spray gun, and then a thin film that would become a polyurethane resin film layer was formed on the mold surface.

It was prepared as a leather powder dispersion of dimethylformamide which had been re-ground by 8 mills.

In order to prepare gelatin powder having the above-mentioned unique particle size distribution, gelatin powder was used which was prepared by air-classifying gelatin with a molecular weight of 1,000 to 3,000 using a jet mill and then pulverizing it. .

Further, before blending this gelatin powder with dimethylformamide and stirring, the water content contained in this gelatin powder was adjusted to less than 7.5% by weight.

Add 21 parts by weight of gelatin powder and 9 parts by weight of leather powder to dimethylformamide, and add 7 parts by weight of the gelatin/leather powder mixture.
When the gelatin powder and leather powder were mixed and stirred so as to achieve 0 parts by weight, gelatin powder and leather powder were dispersed in dimethylformamide in a suspended state and did not aggregate in dimethylformamide.

70 parts by weight of a suspension of gelatin powder and leather powder in dimethylformamide, 100 parts by weight of a dry urethane resin solution with a urethane resin solid content of 30% by weight, and 15 parts by weight of a pigment as necessary are mixed. The above-described thin film of 10 to 20 μm was formed on the mold surface of a rim mold.

Next, the iron core was set in the rim mold, and after the mold was clamped, a molding resin was injected into the mold.

This injection molding resin is produced by injecting liquid A, which is a mixture of polyether, crosslinking agent, catalyst, and blowing agent, and liquid B, which is an isocyanate, into a mixing head using a pump.
The liquid was mixed by collision and then injected into a mold for use.

As a result, no unreacted isocyanate groups remained in the polyurethane resin injected into the mold, and no denaturation of the gelatin powder contained in the thin film coated on the mold surface was observed. .

Next, the molded handle was immersed in hot water at 100° C. for 30 minutes, taken out after washing in hot water, and dried.

5 ma Ta.

This molded handle has surface properties such as abrasion resistance between the surface film layer and the grooves, which are made only of polyurethane resin without the addition of gelatin powder or leather powder.
It caused a sticky feeling on the hands that came in contact with it. In addition, in dry winter conditions, the grip was poor, causing a slippery feeling when operating the steering wheel. In addition, the strong reflection of light rays made it difficult to operate the steering wheel.

Example 2 The amount of gelatin powder in Example 1 was changed to 9 parts by weight,
A handle was molded under the same conditions except that the leather powder was 1.5 parts by weight.

This molded handle felt a little sticky when I touched it, but it had a moist feel, had a good grip, and didn't bother me too much with the reflection of light. especially,
The mechanical properties of the film layer on the surface of this handle were good.

The handle molded in this manner had a polyurethane resin film layer containing leather powder, and had numerous fine pores of several microns on its surface, and fine irregularities were formed on the surface of the molded product.

As a result, there was no sticky feeling when gripping the handle, and there was a feeling of trying. Furthermore, even in the dry winter season, the handle surface felt moist and had a suitable contact resistance.

In addition, the unevenness on the handle surface and the fine holes caused the light rays to interfere with each other, creating a soft matte state.

Furthermore, the surface film layer did not become brittle due to the elution of gelatin powder, and the surface properties such as abrasion resistance and tensile strength showed values substantially close to those of a pure polyurethane resin film.

Comparative Example 1 The blending amount of gelatin powder in Example 1 was 6 parts by weight,
A handle was molded under the same conditions except that the leather powder was 10 parts by weight.Example 3 A handle was molded under the same conditions except that the amount of gelatin powder in Example 1 was 36 parts by weight and the leather powder was 21 parts by weight. The handle was molded under the same conditions.

This molded handle feels close to leather when you touch it.
It had a dry feeling with no stickiness at all, and the grip was particularly good. In addition, the texture was soft, similar to leather, but the surface was noticeably rough and it was observed that part of the surface peeled off slightly when the surface was rubbed strongly.

Comparative Example 2 A handle was molded under the same conditions as in Example 1 except that the blended amount of gelatin powder was 43 parts by weight and the blended amount of leather powder was 23 parts by weight.

The surface of this molded handle was rough and the film layer was not sufficiently formed, making it unsuitable for use.

Example 4 The other conditions were the same as in Example 1 except that the elution of the gelatin powder contained in the polyurethane resin skin H layer was performed using a 30% alcohol aqueous solution instead of using hot water. The handle was molded as follows.

In this example, a handle on which a polyurethane resin film layer was formed in Example 1 was immersed in a 30% alcohol solution diluted with water, and then the handle was immersed in water for 30 seconds or more. The surface was pressed and rubbed for 5 minutes.

Most of the gelatin powder contained in the surface film layer is extracted from this molded handle, and either holes with a particularly well-shaped shape are formed in this surface film layer, and a glossy soft [-
It had a soft texture, a unique 1-lie feel with no sagging feeling upon contact, and a moderately moisturized grip feeling.

Example 5 The surface of the metal panel 5 was immersed in water and subjected to ultrasonic vibration, and then washed with water for 60 minutes in the same manner as in Example 1 above.

The metal panel obtained in this step had a leather-like film on its surface, and the feeling of coldness upon contact was eliminated, as well as the feeling of stiffness upon contact. Also, it did not have the slippery feeling that is characteristic of metal panels, and had a moist feel to the touch. Furthermore, there was less sweating and dew condensation on the metal panel surface.

Example 7 An armrest was prepared under the same conditions as in Example 6, except that the object on which the coating film was formed was a wooden chair, and the thickness of the film to be formed was 25 μm.

Unlike the wooden armrests, the handrests obtained by sawing had a soft matte texture, and the texture was less than that of the wooden armrests. The wooden armrest also had an excellent moist feel to the touch. In addition, after forming the rim of a pan 1 to 1 with an appropriate 4-film layer to prevent the wooden handle from getting more wet than necessary, the handle was immersed in warm water at around 60°C for 20 minutes. The gelatin powder was eluted. The conditions other than the elution of this gelatin powder were the same as in Example 1 above.

In the surface film layer of the breads 1 to 1 thus obtained, innumerable pores and seratin remaining deep within the pores were observed.

The handle, which has some of the ceratin remaining inside the hole, has a good grip when operating the handle, has almost no sticky feeling, and has a soft, matte texture to the eye. Ta.

Example 6 D lvl F-M containing 100 parts by weight of a dry urethane resin solution having a solid content (non-volatile content) of 30% by weight, 20 parts by weight of gelatin powder, and 1 part by weight of leather bones.
Mix 70 parts by weight of Seratin dispersion of E K and coat the surface of the metal panel with a film J! After being blown to 15 μm and dried, it was observed that a temperature of 6 degrees was applied to the wood part of the shavings.

[Effects] In the leather-like molded article and the molding method thereof according to the present invention, leather powder that retains the characteristics of natural leather and gelatin powder whose particle size can be adjusted are used, and this gelatin powder and The leather powder was prepared as a fine particle size of about 1 to 10 μm to correspond to the thickness of the formed film layer, and the leather powder was dotted on the surface of the molded product using these gelatin powder and leather powder. At the same time, since a film layer with fine pores was formed,
It produced the following distinctive effects.

First, we were able to dot the surface of the molded product with leather powder itself and form a leather-like porous layer, making it possible to obtain a leather-like molded product without any loss of the original properties of the molded product. did it.

In addition, by using gelatin powder, pores with a uniform diameter can be easily formed on the surface of a molded product with a uniform distribution density, and a molded product with a high-quality leather-like surface can be provided at a low price. We were able to.

Furthermore, because we were able to form pores with a uniform distribution density on the surface of the molded product, and because we dotted the leather powder itself, it absorbs sweat upon contact and provides a moderately dry feeling. Moreover, the surface of the molded product had an appropriate humidity due to the moisture contained in these pores and the leather powder, and the molded product had a moist feel to the touch.

In addition, since the film layer on the surface of the molded product was a porous polyurethane resin film layer, these felts were even softer to the touch.

Furthermore, the leather powder itself is scattered on the film layer on the surface of the molded product, and this film layer has many pores, and the surface of this film layer has minute irregularities, so that light rays are It was possible to create a soft, matte, leather-like texture without any reflection.

In addition, when some gelatin is left in the pores formed in the film layer on the surface of the molded product, this residual gelatin and the leather powder contained in the film layer absorb and desorb moisture appropriately. However, it was possible to provide the molded product with a particularly moist texture and a moderately dry feel without stickiness on the surface of the molded product.

From this point of view, the leather-like molded product and the method for molding the same according to the present invention can be applied to all kinds of everyday items, such as personal items such as bags, accessory cases, and buckles. , furniture such as chairs, building materials such as flooring,
Used as grips for operating various devices, key chains, steering wheels, horn pads, shift knobs, armrests, console boxes, and other automobile interior parts.

[Brief explanation of the drawing]

Figure 1 is an enlarged sectional view of the main part of the molded article according to the present invention before gelatin 90 powder is removed, Figure 2 is an enlarged sectional view of the main part with gelatin powder removed, and Figure 3 is gelatin powder. An enlarged sectional view of the main part of an example of a molded product in which a portion of
Figure 4 is a sectional view of the main parts showing an example of molding the handle, Figures 5-
FIG. 7 is an enlarged sectional view of the main parts sequentially showing the molding method. 1... Molded product, 2... Polyurethane resin film layer, 3
... Gelatin powder, 4... Leather powder, 5... Hole, 6.
... Mold, 7... Iron core, 8... Molding resin.

Claims (1)

[Scope of Claims] 1. A molded article having a polyurethane resin film layer on the surface, the polyurethane resin film layer containing gelatin powder and leather powder, and the gelatin in the polyurethane resin film layer. A leather-like molded article characterized in that at least a part of the powder is eluted or extracted to form a porous film layer. 2. Forming a thin film of polyurethane resin containing gelatin powder and leather powder on the surface of the mold, which will become the surface film layer of the molded product, and filling the mold with molding resin to form a polyurethane resin film layer on the surface. A method for forming a leather-like molded article, which comprises forming a molded article, and eluting or extracting at least a portion of the gelatin powder in the surface polyurethane resin coating layer of the molded article to form a porous coating layer. 3. A porous film layer is obtained by eluting or extracting at least a portion of the gelatin powder from the polyurethane resin film layer of a molded article formed by coating a polyurethane resin film layer containing gelatin powder and leather powder. A method for forming a leather-like molded product characterized by: