KR101565389B1 - Base material manufacturing method using the silicone resin coating solution - Google Patents

Abstract

A base material manufacturing method comprises the steps of: primarily coating release paper with a first silicone resin coating solution, drying and curing the same; secondarily coating the release paper coated with the first coating solution with a second coating solution including a microsphere in the second silicone resin coating solution, drying, curing, and foaming to expand the same; tertiarily coating the release paper coated with the second coating solution with a third coating solution including a second silicone resin; laminating the release paper coated with the third coating solution on various fabrics, drying, curing, and foaming to expand the same; and separating the release paper from the various fabrics on which the release paper is laminated. The method uses the microsphere in the secondary and tertiary silicone resin coating solution to foam and expand to laminate by using the various fabrics.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base material manufacturing method using a silicone resin coating solution,

The present invention relates to a method for producing a substrate using a silicone resin coating liquid applied to various furniture, bags, interior wallpaper, etc., and particularly to a silicone resin coating solution which is foamed and expanded by using a microsphere, More particularly, the present invention relates to a method for manufacturing a base material to be applied to various furniture and bags, interior wallpaper and the like requiring a texture of natural leather.

In general, polyurethane or polyvinyl chloride (PVC) is mainly used as a coating agent for manufacturing various substrates such as furniture, bags, and interior wallpaper. The method for producing a substrate using polyurethane includes 20 to 80 parts by weight of a solid polymerized with a polyol, a chain extender, an isocyanate or the like in an organic solvent such as dimethylformamide or methyl ethyl ketone, and has a viscosity of 50,000 to 150,000 cps / ° C, and a coating agent, and the production method thereof is generally divided into a dry method and a wet method.

In the dry method, a polyurethane coating layer and an adhesive layer are used. A coating solution prepared by blending polyurethane, dimethylformamide, methyl ethyl ketone, and pigment in an appropriate ratio is coated on a release paper at least once, and the release paper is passed through a dryer, Volatilized to form a film.

Then, a polyurethane adhesive, a hardening agent, a hardening accelerator, dimethylformamide, and methyl ethyl ketone are again coated on the surface with a coating liquid, and then a cloth is adhered thereto with an adhesive to sufficiently cure the film. Thereby producing a urethane substrate.

However, in the case of the synthetic leather produced in this way, there has been a problem in the working environment due to the use of the organic solvent and an environmental problem due to the organic solvent remaining in the finished article of the substrate.

Therefore, in recent years, a technology for producing a base material using an aqueous dispersion type polyurethane that does not contain an organic solvent has been studied and developed. However, the difficulty in manufacturing process such as processability and the lack of economics for commercialization, And it was difficult to commercialize them.

Therefore, the applicant of the present invention has provided a technique for meeting the upwardly required physical properties with existing environmental problems and description. As a conventional technique, a method of manufacturing a base material using liquid silicone rubber (LSR) (Korean Patent Laid-Open Publication No. 10-2012-0078587) is disclosed. However, in the case of a base material produced by this method, And it is difficult to apply it to various kinds of furniture and household goods because it is difficult to implement the texture and the expensive liquid silicone rubber coating solution is used in a large amount.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a substrate for various household goods such as furniture, bags, interior wallpapers, To provide a feeling of cushion and to provide a feeling of natural leather by the surface coating, to lower the cost of production, to have excellent adhesive strength, and to be excellent in various physical properties such as stain resistance, flame retardancy, light resistance, hydrolysis resistance, And to provide a substrate that can satisfy the required physical properties of various furniture and household goods.

In order to accomplish the above object, there is provided a method of manufacturing a substrate using a silicone resin coating liquid applied to various furniture and household articles according to the present invention is a method of coating a release paper with a first silicone resin coating solution, , Curing step; Coating the second silicone resin coating liquid with a second coating liquid containing a microsphere on a release paper coated with the first coating liquid to perform drying, curing, foaming and expansion; A third coating solution containing a second silicone resin on the release paper coated with the second coating solution; Coating the releasing paper coated with the third coating solution on various fabrics, and then drying, curing, foaming and expanding; And peeling the release paper from the various fabric materials to which the release paper is entrapped; And then the mixture is foamed and expanded by using a microsphere in a coating solution of a secondary or tertiary silicone resin containing a polyolefin,

Peeling the release paper; Subsequently surface-treating the release surface of the release paper with a silicone surface coating agent; As shown in FIG.

A patent (10-2011-0041342) is registered in the technology relating to the silicon surface treatment agent used herein.

According to the present invention, as a base material, a silicone resin including a microsphere is coated to promote foaming and expansion, thereby realizing the texture of natural leather, providing a reasonable production cost, and providing flame retardancy, heat resistance, antifouling property, It is possible to provide a substrate which is excellent in hydrolysis resistance and is suitable for various furniture and household goods.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. The following description is intended to assist in the understanding and understanding of the present invention, but is not to be construed as limiting the invention thereto. It will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention as set forth in the following claims.

The present invention is basically a method for producing synthetic leather, and uses a silicone resin coating liquid. That is, a first coating is performed on a release paper with a first silicone resin coating solution, followed by drying and curing; Coating the second silicone resin coating liquid with a second coating liquid containing a microsphere on a release paper coated with the first coating liquid to perform drying, curing, foaming and expansion; A third coating solution containing a second silicone resin on the release paper coated with the second coating solution; Coating the releasing paper coated with the third coating solution on various fabrics, and then drying, curing, foaming and expanding; And peeling the release paper from the various fabric materials to which the release paper is entrapped; And the release paper is peeled off from the fabric that has been prepared by using various fabrics to expose the base material for providing the cushion layer by using a microsphere in the secondary and tertiary silicone resin coating liquids .

Specifically, a releasing paper coating step of preparing a first coating liquid containing a zeolite (antibacterial property, non-repellency) in an addition type first silicone resin, coating the releasing paper first, drying and curing the resin, A second silicone resin coating liquid containing a microsphere is coated and dried, cured and foamed, a foaming and expansion coating process for progressing expansion, a third coating process for additionally using a microsphere for adhering purposes, It is a binder coating process to third coat the silicone resin coating liquid. A fabric gathering process in which the various fabrics are bundled, followed by drying, curing, foaming and expansion, and a releasing process for peeling the releasing paper from the fabric to which the releasing paper is adhered.

After the release process, it is possible to further include a step of surface-treating the surface on which the release paper has been peeled with a silicone surface coating agent.

The silicone resin used in the present invention may be composed of a base and a curing agent. The base and the curing agent may be mixed in a similar ratio. Further, the base resin and the curing agent may be mixed at different ratios and the content of the curing auxiliary may be controlled It can also be used. The basic addition reaction forms are the same even if the mixing ratio is controlled. In order to improve processability, the silicone solvent may be added in an amount of 5 to 200 parts by weight based on 100 parts by weight of the silicone resin depending on the characteristics of the final product.

Particularly, it is an object of the present invention to provide a substrate used for various furniture and household goods with the texture of natural leather and to produce the product at a reduced production cost. Therefore, the kind and amount of the silicone resin and the microsphere , And it is important to establish the conditions under which the expansion and expansion occur.

The silicone resin used as a coating layer of a base material applied to various furniture and household goods can be applied differently depending on various kinds of raw materials to be applied or in consideration of mechanical properties and emotional properties of the finished articles. The first silicone resin which forms the coating layer firstly uses a material having a high hardness and a low elongation, and the second silicone resin forming the second coating layer on the first coating layer has a low hardness and a high elongation, and a microsphere And that the third silicone resin forming the third coating layer on the secondary coating layer exhibits excellent physical properties as a substrate to be applied to various furniture and household goods when a low hardness and high elongation is used, .

Hereinafter, a method for producing a substrate using a silicone resin coating liquid applied to various furniture and household goods will be described in detail.

[Manufacturing method of various furniture and household goods substrate]

Various fabrics such as various nonwoven fabrics, woven fabrics, and artificial leather can be used as fabrics in order to produce substrates suitable for various furniture and household goods.

The working viscosity may be adjusted to 5,000 to 150,000 cps / 25 占 폚 by adding a diluting agent in consideration of coating processing characteristics (processing temperature, processing speed, etc.). The primary coating solution thus prepared is first coated on a release paper at an appropriate coating amount (50 to 200 g / m 2), and then dried and cured in a hot air oven at 140 to 180 ° C. In this case, the drying and curing methods can dry and cure in a shorter time as the temperature is higher, and it is preferable that the temperature is from 140 to 180 ° C because it does not affect the release paper and the processing speed is 8 to 10 m / It is most suitable for drying and hardening the primary coating liquid while securing the properties.

After drying and curing the primary coating solution, the secondary coating solution is coated on the primary coating solution at an appropriate coating amount (50 to 300 g / m 2). The microsphere for providing the cushion layer to be used at this time is preferably 20 탆 before expansion and a microsphere having a size of 80 탆 after expansion at a predetermined ratio to prepare a secondary coating solution .

The working viscosity may be adjusted to 5,000 to 150,000 cps / 25 占 폚 by adding a diluting agent in consideration of coating processing characteristics (processing temperature, processing speed, etc.). The second coating solution thus prepared was secondarily coated on the first coated release paper at an appropriate coating amount (50 to 300 g / m 2), followed by drying, curing, foaming and expansion simultaneously in a hot air oven at 140 to 180 ° C It is possible. The method of drying, curing, foaming and expanding can proceed with drying, curing, foaming and expansion in a shorter time as the temperature is higher, and it is preferable that about 140 to 180 ° C does not affect the releasing paper.

After the secondary coating solution is dried, cured, expanded, and expanded, a tertiary coating solution (Binder coating solution) is applied on a release paper coated with a secondary coating solution at an appropriate coating amount (100 to 300 g / m 2) The tertiary coating liquid may or may not be used with microspheres, depending on the properties of the desired properties of the final product.

The tertiary coating liquid is preferably formed by a form or a method capable of enhancing the adhesion between the various base materials and the secondary coating liquid in the subsequent coating process.

In addition, the primary and secondary coating processes can be carried out in a continuous process, and a tertiary coating process can be performed in a sequential process in a sequencing process followed by a separate process.

Generally, it is important to set the processing conditions of a binder to be applied when bonding with a substrate, even in the case of dry processing using a polyurethane resin as in the prior art. In a dry coating bonding method using a polyurethane material, Method is used because the organic solvent contained in the Binder coating liquid can be partially volatilized (about 50%), and then the base material can be mixed with the base material.

However, in the case of using a silicone resin as in the present invention, a semi-dry type adhesive working method can not be used. Particularly, in the present invention, after the coating of the third coating liquid, the fabric base material is laminated in the wet state and the tertiary coating liquid is dried, cured, expanded and expanded in a hot air oven at 140 to 180 ° C. In this case, it is possible to dispense with a variety of substrates by using no silicon solvent or using a small amount within 10%. When a secondary cushion layer is provided by applying a microsphere, drying, curing, foaming, and expansion can be performed in a shorter time as the temperature is higher. Since 140 to 180 ° C does not affect the release paper, Do.

Thus, after the coating with the fabric is completed, a substrate coated with a silicone resin that imparts a cushioning feeling to the coating layer can be obtained by advancing drying, curing, foaming and expansion, and releasing the release paper from the primary coating liquid layer.

In the case of the base material from which the releasing paper has been peeled off as described above, the surface layer is sticky due to the nature of the silicone resin. However, it is difficult to produce such a substrate having sticky characteristics inherent to the resin as it is.

Therefore, it is preferable to control the properties or feeling of the surface of the substrate prepared as described above, and for this purpose, it is preferable to use a silicon surface treatment agent containing various additives (such as silica) for surface treatment.

<Preparation of fabric>

In order to produce a substrate suitable for various furniture and daily necessities, composite yarn (superfine yarn) having a single yarn fineness of 0.001 to 0.3 denier of an interlock type woven double-faced ring letter having excellent suede effect is used as a raw material for a thermoplastic multi- And the composite yarn loop having a length of 0.3 mm or more is formed in 5 to 200 yarns / m, and more than 95% of the composite yarn yarns having a length of 0.3 mm or more have a length of 0.3 to 2.5 mm Which is a double-sided ring letter of an interlock type using this contraction type temple yarn (ATY).

&Lt; Preparation of coating liquid &

50 parts of silicone resin A (Dowcorning R 9700A; 100% of solid content) was added, and 50 parts of silicone resin B (Dowcorning R 9700B; solid content 100%), 30 parts of silicone solvent (Dowcorning 245), 20 parts of Pigment Ink, And 5 parts of a reaction accelerator (Dowcorning CAT-200) were sequentially added thereto to prepare a first coating solution by allowing the viscosity of the coating solution to fall within a range of about 15,000 to 30,000 cps / 25 ° C.

The amount of the reaction accelerator to be added to the primary coating liquid is suitably 1 to 5 parts. This is because the curing time is long when 1 part or less is used, and the pot life of the primary coating is very short when 5 parts or more is used, resulting in poor working efficiency.

50 parts of silicone resin A (Dowcorning LCF 8500A; solid content 100%) was added to the second coating solution, and 50 parts of silicone resin B (Dowcorning LCF 8500B; solid content 100%), 10 parts of silicone solvent (Dowcorning 245) 10 parts of a microsphere (Akzonobel Expancel 909-DU-80) and 5 parts of a reaction accelerator (Dowcorning CAT-200) were sequentially added to the mixture to dilute the second coating solution having a viscosity of about 40,000 to 60,000 cps / .

The amount of the reaction accelerator to be added to the secondary coating liquid is suitably 1 to 5 parts. This is because the curing time is long when one part or less is used for the same reasons as in the case of preparing the first coating solution and the pot life of the first coating solution is very short when 5 parts or more is used, There is a problem that efficiency becomes poor.

In addition, it is appropriate to use 5 to 15 parts of the microspheres to be added to the secondary coating liquid. This is because when 5 parts or less is used, sufficient cushion feeling can not be obtained, and when 15 parts or more is used, excessively expanded and expanded, resulting in a problem of poor wear resistance.

In the case of the third coating solution, 50 parts of silicone resin A (Dowcorning LCF 8500A; solid content 100%) was added and 50 parts of silicone resin B (Dowcorning LCF 8500B; solid content 100%), 10 parts of silicone solvent (Dowcorning 245) And 5 parts of a reaction accelerator (Dowcorning CAT-200) in that order to prepare a third coating solution having a viscosity of about 30,000 to 50,000 cps / 25 ° C.

The amount of the reaction accelerator to be added to the tertiary coating liquid is suitably 1 to 5 parts. This is because the curing time is long when 1 part or less is used and the pot life of the primary coating is very short when 5 or more parts are used There arises a problem that the efficiency of the work is deteriorated.

The amount of the microspheres to be added to the tertiary coating liquid is suitably 2 to 10 parts. This is because a sufficient feeling of cushioning can not be obtained when 2 parts or less is used, and when the amount is 10 parts or more, excessive expansion and expansion causes a problem of adhering to the fabric.

<Coating and Surface Treatment Processing>

The coating process was performed by the dry coating method using the releasing paper with the 1, 2, and 3 coating solutions prepared as described above. First, the prepared primary coating solution was coated on a release paper at a coating amount of 130 g / m &lt; 2 &gt;, followed by drying and curing in an oven at 140 to 180 deg. The secondary coating solution prepared above was secondarily coated on a dried and cured release paper with a coating amount of 170 g / m &lt; 2 &gt; and dried, cured, expanded and expanded in an oven at about 140 to 180 DEG C . Then, the third coating solution prepared above was thirdly coated on the releasing paper on which drying, curing, foaming and expansion proceeded at a coating amount of 170 g / m &lt; 2 &gt;, and then the prepared fabric was coated in a wet state of the tertiary coating solution Followed by drying, curing, foaming and expansion in an oven at 140 to 180 ° C. After completely drying and curing, the interface between the release paper and the primary coating liquid was peeled off to produce a substrate having a surface coated with a silicone resin to impart a cushion layer to the coating layer. In order to adjust the stickiness of the surface, a silicone surface treatment agent prepared from a biodegradable surface coating agent having a surface decontamination and incombustibility provided by the patent (10-2011-0041342) was coated to about 25 g / m 2 or so, Improved texture to give the texture of natural leather.

Claims (3)

As a method of forming a substrate using a silicone resin coating liquid,
A first silicone resin coating liquid containing 30 parts by weight of a silicone solvent, 20 parts by weight of a pigment ink, and 1 to 5 parts by weight of a reaction promoter and having a viscosity of 15,000 to 30,000 cps / 25 DEG C per 100 parts by weight of the silicone resin, Drying and curing (S1);
After the step (S1), a second silicone resin coating liquid containing 10 parts by weight of pigment ink, 10 parts by weight of microspheres and 1 to 5 parts by weight of a reaction promoter and having a viscosity of 40,000 to 60,000 cps / (S2) of drying, curing, foaming and expanding;
After step (S2), 10 parts by weight of a silicone solvent, 2 to 10 parts by weight of a microsphere, and 1 to 5 parts by weight of a reaction promoter are mixed with 100 parts by weight of a silicone resin, and a third silicone having a viscosity of 30,000 to 50,000 cps / A step (S3) of tertiary coating with a resin coating liquid;
(S3), a step S4 of forming a cushion layer by arranging a cloth flow and drying, curing, foaming and expanding the cloth flow, and
And removing the releasing paper from the cloth flow after the step (S4) (S5). The method of manufacturing a substrate according to claim 1, further comprising a step of surface-treating the peeled surface of the release paper after the step (S5) to 20 to 30 g / m 2 with a silicon surface treatment agent. The method according to claim 1, wherein the coating amount of the primary coating is 50 to 200 g / m 2, the coating amount of the secondary coating is 50 to 300 g / m 2, and the coating amount of the tertiary coating is 100 to 300 g / Way.