KR100736467B1 - Manufacturing method of conductivity macromolecule cushion sheet - Google Patents

Abstract

Provided is a method for manufacturing a conductive polymer cushion sheet that is advantageously used as a shock absorber capable of absorbing external and internal vibrations and is superior in electromagnetic wave shielding and electricity prevention performances. The cushion sheet(10) is made out of a synthetic polymer resin such as PET, polyurethane, and polyolefine or a synthetic rubber sheet in thickness of 0.18mm to 10.0mm, and has punched holes(11) at regular intervals of 1.0-2.0mm. One side of the cushion sheet(10) is coated with a conductive plating layer(20) consisting of nickel, copper, gold, silver, tin, or cobalt. Then, a surface of the metallic conductive layer is coated with urethane to form a coating layer(30) capable of preventing discoloration of the metal plating layer caused by oxidation.

Description

Manufacturing method of conductive macromolecule cushion sheet

1 is a partially cutaway perspective view of a cushion seat manufactured according to the present invention

Figure 2 is an enlarged cross-sectional view of a part of the cushion seat produced by the present invention

[Explanation of symbols on the main parts of the drawings]

10: cushion seat

11: Hall

20: plating layer

30: coating layer

The present invention is a non-woven fabric, a woven fabric, a film (Film), a metal foil (Foil), etc. bonded to one or both sides of the perforated or perforated cushion sheet, or a mesh-like material is planted in the sheet The conductive sheet is plated with nickel, copper, gold, silver, tin, cobalt, etc. with excellent conductivity to impart conductivity to the perforated sheet, and then the surface of the metal plating layer By coating urethane, it prevents discoloration and fingerprint generation of the plating layer on the conductive cushion sheet having excellent tensile strength and cushioning properties, and is used for electronic communication devices, portable mobile devices, plasma display panels (PDPs), and liquid crystal display devices (LCDs). It relates to a shock absorber that absorbs external shocks and internal vibrations generated in a device such as a liquid crystal display, and a method for manufacturing a conductive polymer cushion sheet to prevent electromagnetic shielding and static electricity due to excellent conductivity. .

In general, the conductive polymer elastomer sheet is formed by attaching a conductive fabric or film to urethane, polyurethane foam, and the like, and then penetrates the conductive coating agent into the perforated space and the upper and lower sides, or forms a sheath cutout in the cushion material to conduct the conductive portion at the cut portion. The material is impregnated and hardened to join the incisions, allowing up and down energization.

However, the conventional cushion sheet is made by penetrating or filling the coating agent mixed with the conductive resin material with the polymer resin binder in the perforated space and the upper and lower sides, and hardening them, thus making it elastic by the filled metal coating agent of the hole and the incision. There is a disadvantage in that the recovery strength is poor, and the metal hardened by penetration and impregnation has a problem such that the sheet is easily removed from the sheet when the sheet is moved or twisted due to the difference in physical properties of the sheet.

In order to solve the above problems, the present applicant has devised a 'manufacturing method of conductive polymer cushion sheet' of Korean Patent No. 10-0619573.

In other words, the ultrasonically cleaned cushion sheets in which fine holes are closely arranged at regular intervals are subjected to electroless plating, electroplating, or substitution plating, so that metals such as nickel, copper, gold, silver, tin, and cobalt are separated from the cushion sheet surface. Plating the surface of the hole provides a shock absorber excellent in elastic recovery force and a conductive polymer cushion sheet excellent in electromagnetic shielding efficiency with excellent conductivity.

The present invention further improves and develops the manufacturing method of the conductive polymer cushion sheet of the present applicant, bonding the nonwoven fabric, woven fabric, films, metal foils, etc. to one or both sides of the perforated cushion sheet or the perforated cushion sheet or sheet Tensile strength is provided by plating a metal with a mesh-like material into the perforated sheet to impart conductivity by plating metal such as nickel, copper, gold, silver, tin, and cobalt with excellent conductivity, and then coating urethane on the surface of the metal plating layer. Prevents discoloration of the plating layer on the conductive cushion sheet with excellent cushioning properties and absorbs external shock and internal vibration generated in electronic communication devices, portable mobile devices, plasma display panels, liquid crystal display devices, etc. Provided is a method of manufacturing a conductive polymer cushion sheet to prevent electromagnetic shielding and static electricity by.

1 is a partially cutaway perspective view of a cushion seat manufactured according to the present invention, and FIG. 2 is a partially enlarged cross-sectional view of the cushion seat manufactured according to the present invention.

The cushion sheet may be a polymer synthetic resin or synthetic rubber sheet such as polyethylene terephthalate (PET), polyurethane (polyurethane), polyolefin (Polyolefine).

The cushion sheet 10 can be adjusted in thickness according to its use, such as its thickness from 0.18 mm to 10.0 mm, depending on its use.

In the case of polyolefin sheet, the thickness is adjusted according to the density and foaming degree of polyolefin, and the resulting polyolefin sheet is perforated and plated to give conductivity, thereby providing electrical conduction through the plated hole of the perforated sheet. Strengthen the tensile force by completing the excellent electromagnetic shielding cushion sheet 10, or by bonding and plating nonwoven fabric, woven fabric, films, metal foils, and the like.

In the case of the material of polyurethane, in addition to the above method, by planting a material such as a mesh (mesh) shape in the urethane, through the plating method to have a tensile strength and cushioning properties at the same time.

These all belong to the processing method of the cushion seat 10 according to the range of use is very diverse.

The punching method of the cushion sheet 10 is a hole pin mold plate or a pin mold plate, which is punched in the punching machine. In the case of the hole pin mold plate, the sheet meat is cut out by the hole. In the method of forming a hole, the gap between the hole and the pin is adjusted to within 1.0 ~ 2.0mm.

 The urethane coating layer, which strengthens the adhesion of the metal, prevents discoloration due to oxidation of the metal plating layer of the cushion sheet, and prevents fingerprint smudges from handling, is usually used for resins such as water-soluble polyurethane resins, polyether resins and polyacrylic resins. You can do

Example 1

Copper and nickel plated cushion sheets;

The cushion sheet 10 having holes 11 formed at regular intervals is passed through an ultrasonic washing tank to remove contaminants remaining in the cushion sheet 10 and to impart hydrophilicity to the cushion sheet 10 to increase the plating area. Widen enough.

After passing through an etching bath with a caustic soda concentration of 10 to 20% having a temperature of 75 to 100 ° C., a caustic soda residue is removed from the sheet through a washing bath, and then a catalyst made of a mixture of palladium chloride and tin chloride. The bath adsorbs the palladium ions in the sheet.

After removing the tin ions adsorbed together with the palladium ions to form only the palladium metal ions in the cushion sheet 10 to pass through the activation tank of sulfuric acid 10 ~ 20% concentration, nickel sulfate 20 ~ 30g / ℓ, After depositing nickel metal by depositing electroless nickel plating bath mixed with 20 ~ 30g / ℓ of sodium hypophosphite and 30 ~ 45g / ℓ of sodium citrate, and forming nickel layer, copper sulfate for excellent copper metal plating 3.0-4.5 g / l, caustic soda 8-10 g / l, and formalin 4.0-5.5 g / l are deposited in an electroless copper plating bath to deposit copper metal to form a copper metal plating layer 20.

In order to protect the well-oxidized copper metal layer, the electroless nickel plating bath as described above is formed once more to form a plating layer 20 of nickel metal on the copper layer, thereby producing a conductive cushion sheet 10 having excellent up and down conductivity.

In order to prevent discoloration of the nickel layer and more firm adhesion of the metal layer, and to prevent fingerprints or stains on the surface of the product, it is deposited in an aqueous urethane bath of 20% polyurethane with a temperature of 18-25 ° C and coated with urethane on the surface ( 30).

Example 2

Gold plated cushion seat;

Gold is strongest in oxidation compared to other metals, so it is the best when it is applied as a part material in the device because it has less strength for deterioration.

The cushion sheet 10 having holes 11 formed at regular intervals is passed through an ultrasonic washing tank to remove contaminants remaining in the cushion sheet 10 and to impart hydrophilicity to the cushion sheet 10 to increase the plating area. Widen enough.

After passing through an etching bath with a caustic soda concentration of 10 to 20% having a temperature of 75 to 100 ° C., a caustic soda residue is removed from the sheet through a washing bath, and then a catalyst made of a mixture of palladium chloride and tin chloride. The bath adsorbs the palladium ions in the sheet.

After removing the tin ions adsorbed together with the palladium ions to form only the palladium metal ions in the cushion sheet 10 to pass through the activation tank of sulfuric acid 10 ~ 20% concentration, nickel sulfate 20 ~ 30g / ℓ, Sodium hypophosphite 20-30 g / l and sodium citrate 30-45 g / l were deposited in an electroless nickel plating bath to deposit nickel metal to form a nickel layer, followed by potassium cyanide (KAu (CN) ₂ ) 0.75 ~ A plating layer 20 of gold (Au) metal is formed by depositing a mixed solution of an acid salt and an alkali salt containing 1.0 g / l.

In order to prevent the discoloration of the gold layer and the adhesion of the metal to be further strengthened, and to prevent fingerprints or stains on the surface of the product, it is deposited in an aqueous urethane bath of 20% of polyurethane at a temperature of 18-25 ° C and coated with urethane on the surface (30 ).

Example 3

Silver plated cushion sheets;

The harmlessness of silver metals is well known, and its wide range of use is an advantageous metal that can be applied to parts other than devices.

The cushion sheet 10 having holes 11 formed at regular intervals is passed through an ultrasonic washing tank to remove contaminants remaining in the cushion sheet 10 and to impart hydrophilicity to the cushion sheet 10 to increase the plating area. Widen enough.

After passing through an etching bath with a caustic soda concentration of 10 to 20% having a temperature of 75 to 100 ° C., a caustic soda residue is removed from the sheet through a washing bath, and then a catalyst made of a mixture of palladium chloride and tin chloride. The bath adsorbs the palladium ions in the sheet.

After removing the tin ions adsorbed together with the palladium ions to form only the palladium metal ions in the cushion sheet 10 to pass through the activation tank of sulfuric acid 10 ~ 20% concentration, nickel sulfate 20 ~ 30g / ℓ, After dipping in an electroless nickel plating bath containing 20-30 g / l sodium hypophosphite and 30-45 g / l sodium citrate to precipitate nickel metal to form a nickel layer, silver cyanide (KAg (CN) ₂ ) 60 g / The silver plating solution is deposited and silver is deposited to form a plating layer 20 of silver (Ag) metal.

Silver (Ag) combines with oxygen in the air to form silver oxide (Ag ₂ O) or reacts with sulfur dioxide (So ₂ ) gas in the air to discolor with silver sulfate (Ag ₂ SO ₄ ). Discoloration prevention chemical treatment is performed by dipping in a discoloration prevention drug (Taniban Concentrate, manufacturer name: TECHNIC.INC), which is composed mainly of perchlorate.

Generally, the silver discoloration preventing agent uses a commercially available drug such as TARNIBAN CONCENTRATE manufactured by US TECHNIC.INC.

In addition, it is possible to further prevent discoloration and adhesion of the metal and to prevent the occurrence of fingerprints or stains on the surface of the product. To form.

(Example 4)

Mesh-like material insertion cushion seats;

The polyurethane cushion sheet 10 is formed by inserting a 130-mesh mesh made of polyester into the sheet in order to increase tensile strength of the material due to the nature of the manufacturing process, and then perforate the electroless wet plating or electroplating. The plating layer 20 is formed through.

In the manufacturing process of the polyurethane sheet, the adhesive is applied to the release paper, the mesh is laid, the laminating is performed, the polyurethane solution is poured, the coating is performed, and the solvent is eluted at 30 ° C. for 15 minutes. After evaporating the remaining solvent for about 40 minutes in the water of 40 ℃ ~ 70 ℃ and dried in a dryer of 120 ℃, to produce a polyurethane cushion sheet (10) by peeling to separate the release paper and the polyurethane.

Mesh-inserted polyurethane cushion sheet 10 is wet-plated the above metals after the perforation, and the polyurethane coating layer 30 on the surface of the plating layer 20 by immersing in a 20% polyurethane aqueous polyurethane bath at a temperature of 18 ~ 25 ℃. By forming the thinner cushion sheet 10 can be provided excellent tensile force and cushioning properties.

Example 5

Fiber fabric cushion sheet;

On one or both sides of the perforated cushion sheet 10, a polyester fabric, such as a woven fabric or a non-woven fabric, is punched by bonding a polyester fabric with a polyurethane adhesive and coated with the above metal plating. After that, by depositing a polyurethane coating layer 30 on the surface of the plating layer 20 by depositing in a 20% polyurethane concentration of a polyurethane concentration of 18 ~ 25 ℃ temperature, there is a good conductivity, and then using the cushion sheet 10 By reducing the processing procedure to fit the product to reduce the processing cost and processing time of the user reprocessing the cushion sheet (10).

Example 6

Film composite cushion sheets;

Polypropylene (PP: Poly Propylene), Polyethylene (PE: Poly Ethylene), Low Density Poly Ethylene (LDPE), Linear Low Density Poly Ethylene (LLDPE), High Density Polyethylene Films such as HDPE: Hi Density Poly Ethylene (PS), Poly Styrene (PS) and Acrylonitrile Butadiene Styrene (ABS) are laminated to one or both sides and perforated, and the above metal plating is applied. Then, by dipping in a 20% polyurethane concentration of an aqueous urethane bath having a temperature of 18 ~ 25 ℃ to form a urethane coating layer 30 on the surface of the plating layer 20 to give excellent conductivity while using a variety of thicknesses of the film cushion sheet (10) The thickness of can be adjusted in various ways.

Example 7

Metal foil cushion sheets;

The perforated cushion sheet 10 is perforated by laminating various metal foils such as aluminum foil, copper foil, gold foil, silver foil, nickel foil on one side or both sides, and after the above metal plating, a polyurethane concentration having a temperature of 18-25 ° C. By depositing a 20% aqueous urethane bath to form a urethane coating layer 30 on the surface of the plating layer 20 can be utilized in a variety of ways, such as LCD cushions, mobile phone parts through excellent conductivity and various metal foils.

Example 8

Conductive fabric and conductive cushion sheet 10;

Copper, nickel, gold, silver on one or both sides of the perforated conductive cushion sheet 10 forming copper and plating layer 20 in the manner of Examples 1 to 3 ), Cobalt, Tin (TIn), such as metal plating of conductive fabrics can be combined with a polyurethane adhesive can be used in a variety of products.

As described in detail above, the present invention provides a mesh shape in which the nonwoven fabric, woven fabric, films, metal foils, etc. are bonded to one or both surfaces of the perforated cushion sheet 10 or the perforated sheet, or the cushion sheet 10. After perforating the sheet of the plant material and perforating the metal, such as nickel, copper, gold, silver, tin, cobalt, etc., which has excellent conductivity, and imparting conductivity, the surface of the metal plating layer 20 is coated with urethane, thereby providing tensile strength and cushioning properties. The adhesion of the metal to the plating layer 20 of the excellent conductive cushion sheet 10 can be prevented and fingerprints generated during metal discoloration and handling due to oxidation can be prevented, and thus, electronic communication devices, portable mobile devices, plasma display panels, and liquid crystals. The role of shock absorber that absorbs external shocks and internal vibrations generated by devices such as display devices, and shields electromagnetic waves and prevents static electricity due to excellent conductivity. And it is.

Claims (8)

The cushion sheet 10 having holes 11 formed at regular intervals is passed through an ultrasonic washing tank to remove contaminants remaining in the cushion sheet 10 and to impart hydrophilicity to the cushion sheet 10 to increase the plating area. After sufficiently widening the caustic soda at a concentration of 10 to 20% at a temperature of 75 to 100 ° C, the caustic soda residue is removed from the sheet through a washing bath, and then a mixture of palladium chloride and tin chloride Palladium ions in the sheet are adsorbed through the catalyst tank, and then, through the activation tank of sulfuric acid 10-20% concentration to remove tin ions adsorbed together with the paradium ions, the palladium metal ions in the cushion sheet 10 After the bay was formed, it was deposited in an electroless nickel plating bath containing 20-30 g / l nickel sulfate, 20-30 g / l sodium hypophosphite, and 30-45 g / l sodium citrate to precipitate nickel metal to form a nickel layer. For plating copper metal with excellent conductivity In Shandong 3.0 ~ 4.5g / ℓ, sodium hydroxide 8 ~ 10g / ℓ, poreumarin 4.0 ~ 5.5g / ℓ electroless the cushion sheet manufacturing method hayeoseo form a plating layer 20 of copper metal by immersion of the copper plating bath; A cushion sheet 10 having a copper metal plating layer 20 formed thereon was used in an electroless nickel plating bath containing 20-30 g / l nickel sulfate, 20-30 g / l sodium hypophosphite, and 30-45 g / l sodium citrate. It is further deposited to form a nickel metal plated layer 20 on the copper layer to protect the well-oxidized copper metal layer, By depositing in a 20% polyurethane aqueous polyurethane bath with a temperature of 18 ~ 25 ℃ to form a urethane coating layer 30 on the nickel layer to further prevent the discoloration of the nickel layer and to improve the adhesion of the metal, fingerprints or stains on the surface of the product Method for producing a conductive polymer cushion sheet, characterized in that to prevent the. delete The cushion sheet 10 having holes 11 formed at regular intervals is passed through an ultrasonic washing tank to remove contaminants remaining in the cushion sheet 10 and to impart hydrophilicity to the cushion sheet 10 to increase the plating area. After sufficiently widening the caustic soda at a concentration of 10 to 20% at a temperature of 75 to 100 ° C, the caustic soda residue is removed from the sheet through a washing bath, and then a mixture of palladium chloride and tin chloride Palladium ions in the sheet are adsorbed through the catalyst tank, and then, through the activation tank of sulfuric acid 10-20% concentration to remove tin ions adsorbed together with the paradium ions, the palladium metal ions in the cushion sheet 10 After the bay was formed, it was deposited in an electroless nickel plating bath containing 20-30 g / l nickel sulfate, 20-30 g / l sodium hypophosphite, and 30-45 g / l sodium citrate to precipitate nickel metal to form a nickel layer. Deposits nickel metal in electroless nickel plating bath Exodus was in that formed with a nickel layer and then sianhwaeun potassium (KAg (CN) ₂₎ production method of the precipitation of deposition, is a silver plating solution of 60g / ℓ of silver (Ag) The hayeoseo forming plated layer 20 of the metal cushion sheet , A cushion sheet 10 having a silver metal plating layer 20 formed on the surface thereof is immersed in a discoloration preventing chemical tank containing about 10% perchlorate as a main component (other components), and discoloration preventing chemicals are treated on the silver layer. The treated cushion sheet 10 is immersed in a 20% polyurethane aqueous urethane bath having a temperature of 18 to 25 ° C. to form a urethane coating layer 30 on the silver layer to further prevent discoloration of the silver layer and further enhance the adhesion of the metal. Method for producing a conductive polymer cushion sheet, characterized in that to prevent the occurrence of fingerprints or stains on the surface. The method of claim 1 or 3; The cushion sheet 10 is coated with a 130-mesh mesh made of polyester, and then coated with a release paper, followed by laminating. After eluting the solvent in water for 15 minutes, the remaining solvent was eluted for 40 minutes in water of 40 ℃ ~ 70 ℃ and dried in a dryer at 120 ℃, after separating the release paper and polyurethane, the mesh is Holes 11 are formed in the inserted polyurethane cushion sheet 10 with perforations at regular intervals to form the plating layer 20 through electroless wet plating or electroplating, and 20% polyurethane concentration having a temperature of 18 to 25 ° C. Method of producing a conductive polymer cushion sheet, characterized in that the urethane coating layer (30) on the surface of the plating layer 20 by depositing in an aqueous urethane bath to give excellent tensile force and cushioning properties to a thinner cushion sheet (10). The method of claim 1 or 3; One or both surfaces of the cushion sheet 10 is laminated with a polyester adhesive made of a woven or nonwoven material with a polyurethane adhesive, and then the plating layer 20 is formed by electroless plating or electroplating. A conductive polymer cushion, which is formed by coating a urethane coating layer 30 on the surface of the plating layer 20 by depositing in an aqueous urethane bath having a concentration of 25 ° C. in polyurethane at 25 ° C., to reduce the processing cost and processing time of the user. Manufacturing method of the sheet. The method of claim 1 or 3; Polypropylene (PP) or polyethylene (PE), low density polyethylene (LDPE) or linear low density polyethylene (LLDPE) or high density polyethylene (HDPE), polystyrene (PS) or acrylonitrile butadiene styrene (ABS) After laminating any one of the films to one side or both sides, the plating layer 20 is formed by electroless plating or electroplating, and the plating layer is immersed in a 20% polyurethane aqueous urethane bath having a temperature of 18 to 25 ° C. (20) Method of producing a conductive polymer cushion sheet, characterized in that by forming a urethane coating layer 30 on the surface to give excellent conductivity while controlling the thickness of the cushion sheet 10 using a variety of thickness of the film. The method of claim 1 or 3; After one or both surfaces of the cushion sheet 10 is made of aluminum foil or copper foil, gold foil, or a metal foil made of silver foil or nickel foil, the plating layer 20 is formed by electroless plating or electroplating. , By depositing a polyurethane coating layer 30 on the surface of the plating layer 20 by depositing in a 20% polyurethane polyurethane concentration of 18 ~ 25 ℃ temperature, characterized in that it can be used as LCD inner cushioning material or mobile phone parts Method for producing a conductive polymer cushion sheet. The method of claim 1 or 3; One or both surfaces of the conductive cushion sheet 10 in which the plating layer 20 is formed by electroless wet plating or electroplating may be fabrics having a conductivity plated with copper or nickel, gold, silver, cobalt or tin. Method for producing a conductive polymer cushion sheet, characterized in that it is laminated with a polyurethane adhesive.

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