KR100757409B1 - Manufacturing method of synthetic leather had ventilation function and its synthetic leather - Google Patents

Abstract

A synthetic leather and a method for manufacturing the same are provided to suppress the growing of bacteria and germs, by forming fine vent holes in a surface layer of the synthetic leather so that the synthetic leather is well ventilated. A TPU(thermo-plastic polyurethane) surface layer is formed on embossed release paper. An adhesive layer is formed on the TPU surface layer by spreading a polyurethane resin adhesive on the TPU surface layer. The polyurethane resin adhesive is used to melt concave portions of the TPU surface layer, which is formed along convex portions of the embossed release paper, to form vent holes. A fabric is bonded on the TPU layer by compressing the adhesive layer onto the adhesive layer using a press roller at a room temperature. Herein, the vent holes are formed in the TPU surface layer, which is molten by the adhesive, through fibers of the fabric. The fabric bonded on the TPU layer is dried in a drying room. The release paper is removed from the TPU layer.

Description

Manufacturing method of synthetic leather had ventilation function and its synthetic leather}

The present invention relates to a method for manufacturing a synthetic leather having a breathable and synthetic leather prepared by the manufacturing method thereof, while maintaining the shape and texture of the surface of the synthetic leather intact to form fine pores in the epidermal layer bacteria by ventilation through the pores And it relates to a method for producing a synthetic leather having a breathable to improve its usability by inhibiting bacterial propagation and synthetic leather produced by the production method thereof.

The urethane-based synthetic leather is manufactured by a method of forming a urethane film by applying a urethane compound solution based on a base of a woven or knitted fabric by a dry processing method and then removing the solvent by heat, or a polymer present in a wet urethane resin solution by a wet processing method. The intermolecular cohesion of the liver and the water solubility of the DMF used as a solvent is used to infiltrate the urethane mixture in water, and then extract the DMF to form a film.

As a manufacturing method of the synthetic leather according to the dry and wet processing as described above, the manufacturing method of dry synthetic leather using a patent non-woven fabric of Patent No. 163469, the method of manufacturing a wet synthetic leather of Patent No. 198190, Patent No. 204518 water-based polyurethane resin The manufacturing method of the synthetic leather using and the manufacturing method of the synthetic leather using patent No.564847 water-based polyurethane composite are known.

However, synthetic leather manufactured by the synthetic leather as described above is not ventilated, so it is difficult to efficiently use bacteria and bacteria that are harmful to the human body when used for a long period of time, and it is difficult to use efficiently, and hydrolysis resistance such as fastness due to sweat emitted from the human body It is not free from this fragile and smelly smell.

Accordingly, the present invention has been made to solve the above problems to provide a synthetic leather to improve the usability by inhibiting the growth of bacteria and bacteria through the ventilation through the vent formed in the skin layer of the synthetic leather. There is a purpose.

Another object of the present invention is to provide a synthetic leather that improves the fastness due to sweat emitted from the human body so that the smell is not emitted.

In order to achieve the above object, the present invention uses a thermoplastic polyurethane having a high hydrolysis resistance and is not harmful to the human body (hereinafter referred to as "TPU") as a skin layer, and the ventilating layer is formed in the skin layer.

)부분을 따라 형성된, 즉 TPU표피층의 두께가 얇은 부분{요(

)부분}의 TPU표피층을 녹이면서 통기공을 형성시키는 폴리우레탄수지 접착제를 도포하여 TPU표피층상에 원단을 접합하기 위한 접착제층을 형성시키는 접착제층 형성단계;A TPU skin layer forming step of forming a skin layer by applying a TPU mixture on an embossed release paper;
Iron of the release paper having the embossed formed on the TPU skin layer obtained in the skin layer forming step (

Formed along the part, that is, the thin part of the TPU epidermal layer

Adhesive layer forming step of forming an adhesive layer for bonding the fabric on the TPU skin layer by applying a polyurethane resin adhesive to form a ventilating hole while melting the TPU skin layer;

Pressing the fabric with a press press roller at room temperature without applying heat on the adhesive layer obtained in the adhesive layer forming step, in this process, the fiber of the fabric is stimulated by the TPU epidermal layer dissolved in the adhesive to form a ventilation hole. Fabric bonding step of having a complex function to and then dried and bonded in a drying room;

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Characterized in that the method of manufacturing a synthetic leather having a breathable; consisting of a release paper peeling step of peeling the release paper from the TPU skin layer bonded in the fabric bonding step.

Hereinafter, the present invention will be described in detail.

The present invention is a method of manufacturing a synthetic leather by bonding the fabric (woven fabric) on the back of the TPU as a skin layer, specifically looking at it by the process,

A TPU skin layer forming step of forming a skin layer by applying a TPU mixture on an embossed release paper;

An adhesive layer forming step of forming an adhesive layer for bonding the fabric onto the TPU skin layer obtained in the skin layer forming step;

Fabric bonding step of bonding the fabric on the adhesive layer obtained in the adhesive layer forming step by pressing with a pressure roller;

It consists of a release paper peeling step of peeling the release paper from the TPU skin layer bonded in the fabric bonding step.

The TPU skin layer forming step of forming the skin layer is a step of forming a skin layer so that the skin layer can be formed on the fabric by applying the TPU mixture constituting the skin layer of synthetic leather on a release paper on which embossing is formed. The epidermal layer is 50 to 80 parts of 100 parts of TPU solution dissolved in indirect heat at 80 ° C to 100 ° C with 80 to 150 parts of DMF with 100 parts of TPU chip with hydrolysis resistance and no harm to human body. , 10 to 50 parts of the pigment is mixed well mixed and then applied to 50 ~ 100g / ㎡ with a knife coater, and completely dried in a drying room with an internal temperature of 100 ~ 130 ℃. If the internal temperature is less than 100 ℃ drying may not be good and if it exceeds 130 ℃ may cause deformation by rapid drying. As the diluent, MEK or toluene is suitably used.

)부분, 즉 TPU표피층의 두께 가 얇은 부분{요(

)부분}을 따라 형성된다.The adhesive layer forming step for bonding the fabric on the TPU epidermal layer is a step of applying an adhesive including allowing air to be formed in the TPU epidermal layer while being bonded to the fabric on the TPU epidermal layer obtained in the epidermal layer forming step. . The adhesive of the adhesive layer uses a polyurethane adhesive, but depending on the product, a TPU adhesive may be used, but TPU has a high price, which causes difficulties in terms of product cost. Therefore, in the case of using a polyurethane adhesive, the adhesive may be mixed with 5 to 20 parts of DMF, 10 to 50 parts of MEK, 8 to 15 parts of a curing agent, and 3 to 10 parts of an accelerator, and then sufficiently mixed with a commer coater or the like. Apply with a knife coater at 150 ~ 200g / ㎡ on the TPU skin layer. At this time, the applied adhesive is dried only 20 to 30% in order to bond the fabric in the fabric bonding step. The adhesive applied as described above forms a ventilating hole while melting the TPU of the TPU skin layer, and the iron of the release paper having embossing is formed.

Part, that is, the thin part of the TPU epidermal layer

Part).

The fabric bonding step of bonding the fabric on the adhesive layer is a step of bonding the fabric through the TPU skin layer and the adhesive layer obtained in the TPU skin layer forming step.

The adhesive is applied to the TPU epidermal layer coated with the fabric and bonded through a pressure press roller at room temperature without applying heat. In this process, the adhesive is bonded to the TPU skin layer and the fiber part of the fabric, and at the same time, not only the formation of the vent holes of the TPU skin layer by the adhesive but also the stimulation of the TPU skin layer in which the fibers are melted by the adhesive to form a vent hole. It is preferable to use a raised fabric as the fabric to have. Since the internal temperature is 130 ~ 150 ℃ to dry completely in a drying chamber includes. At this time, when the internal temperature is less than 130 ℃ may result in drying and poor bonding, if the temperature exceeds 150 ℃ there is a fear that the fiber used in the fabric is deformed.

In addition, the fabric bonding step includes the process of cooling in a separate cooling roller or the process of cooling at room temperature for a predetermined time.

The release paper peeling step is a step of peeling (separating) the release paper from the fabric bonding step, that is, the TPU skin layer and the fabric are bonded and cooled on the TPU skin layer. Peeling of the release paper is performed after the TPU skin layer and the fabric are bonded and completed cooling, or after aging for a predetermined time, but the release paper separated (separated) in this step can be reused, so the economical and usability of purchasing expensive release paper is further enhanced. Increases.

The breathable synthetic leather as described above is to be printed on the surface, and then washed and dried according to the use, in which the toxic heavy metals such as cadmium, lead, mercury, chromium and other contaminants remaining in the product are washed. Remove the product, dry it at room temperature, and finish the product with packaging.

EXAMPLE

100 parts of TPU solution melted for 4 hours with indirect heat of 85 ° C with 120 parts of DMF on 100 parts of TPU chips on embossed release paper with 60 parts of diluent (toluene) and 40 parts of pigment (brown). After coating at 80g / m2 using a coater, it was dried in a drying room having an internal temperature of 125 ° C to form a TPU skin layer, in which 15 parts of DMF, 35 parts of MEK, 12 parts of a curing agent, and an accelerator were used in 100 parts of polyurethane resin. Mix the mixture into 8 parts and apply the adhesive at 175g / m2 using a knife coater, and then, in the process of transfer during the process, attach the brushed part of the cotton wool fabric to the TPU skin layer at 25% dryness, and then attach it through a pressure press roller at room temperature. After drying completely in a drying room having an internal temperature of 145 ° C., cooling and releasing (separating) release paper, washing and drying through a printing process were performed to produce breathable synthetic leather.

The breathable synthetic leather obtained in this way had a good texture, and excellent breathability (air permeability) and sweat fastness.

In the above embodiment, the amount of the TPU epidermal layer was carried out at 80 g / m 2, but the amount of the TPU epidermal layer may be varied depending on the use of the product.

Although the present invention has been described above with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and applications are possible within the technical scope of the present invention.

The manufacturing method according to the present invention is to form a skin layer of synthetic resin with a hydrolysis resistance and not harmful to the human body, and by forming a vent hole in the epidermal layer to suppress the growth of bacteria and bacteria by ventilation through the vent hole to improve the fastness of sweat, etc. The quality of the product according to the characteristics of the has a great effect on its usability.

Claims (5)

A TPU skin layer forming step of forming a skin layer by applying a TPU mixture on an embossed release paper; Iron of the release paper having the embossed formed on the TPU skin layer obtained in the skin layer forming step (

Formed along the part, that is, the thin part of the TPU epidermal layer

Adhesive layer forming step of forming an adhesive layer for bonding the fabric on the TPU skin layer by applying a polyurethane resin adhesive to form a ventilating hole while melting the TPU skin layer; Pressing the fabric with a press press roller at room temperature without applying heat on the adhesive layer obtained in the adhesive layer forming step, in this process, the fiber of the fabric is stimulated by the TPU epidermal layer dissolved in the adhesive to form a ventilation hole. Fabric bonding step of having a complex function to and then dried and bonded in a drying room; The release paper peeling step of peeling the release paper from the TPU skin layer bonded in the fabric bonding step; manufacturing method of synthetic leather with breathability. The method of claim 1, wherein the TPU mixture is mixed with 100 parts of TPU solution dissolved in 100 parts of TPU chip with 80 to 150 parts of DMF, 50 to 80 parts of diluent and 10 to 50 parts of dye, and then dried in a drying room at 100 to 130 ° C. Method for producing a synthetic leather having breathability. The method of claim 1, wherein the adhesive is a synthetic leather having air permeability, characterized in that the mixture is made of 100 parts of polyurethane resin DMF 5-20 parts, MEK 10-50 parts, curing agents 8-15, accelerators 3-10 parts Manufacturing method. The method of claim 1, wherein the fabric bonding step in the fabric bonding step is bonded to the TPU epidermal layer and the fabric to which the adhesive is applied and bonded through a pressure press roller at room temperature and then dried in a drying room of 130 ~ 150 ℃ Method of manufacturing synthetic leather with. Breathable synthetic leather produced by the method of claim 1.