METHOD FOR MANUFACTURING SYNTHETIC LEATHER USING DIFFERENT LIQUID SILICONE RUBBER COATING SOLUTIONS

• US 20150165745A1
• Filed: 07/30/2012
• Published: 06/18/2015
• Est. Priority Date: 07/19/2012
• Status: Active Grant

• Current Assignee: TKG ECO Material Company Limited
• Original Assignee: Daewoo International Corporation (Posco)
• Inventors: Kweon, Dowan, Park, Choongryeol, Byun, Heeun
• Granted Patent: US 9,925,752 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 2037/268 Release layers
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2262/0269 Aromatic polyamide fibres
• CPC Class Codes: B32B 2479/00 Furniture upholstery B32B2601/00
• CPC Class Codes: B32B 25/042 of natural rubber or synthetic rubber
• CPC Class Codes: B32B 25/10 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 25/20 comprising silicone rubber
• CPC Class Codes: B32B 2605/003 Interior finishings
• CPC Class Codes: B32B 37/15 with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
• CPC Class Codes: B32B 37/26 with at least one layer which influences the bonding during the lamination process, e.g. release layers or pressure equalising layers
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: B32B 5/024 Woven fabric
• CPC Class Codes: D04H 1/587 characterised by the bonding agents used
• CPC Class Codes: D04H 1/64 the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
• CPC Class Codes: D06N 2209/067 Flame resistant, fire resistant
• CPC Class Codes: D06N 2209/143 Inert, i.e. inert to chemical degradation, corrosion resistant
• CPC Class Codes: D06N 2209/146 Soilproof, soil repellent
• CPC Class Codes: D06N 2211/28 Artificial leather
• CPC Class Codes: D06N 3/128 with silicon polymers
• CPC Class Codes: Y10T 442/2041 Two or more non-extruded coatings or impregnations

Abstract

The present invention relates to a method for manufacturing synthetic leather for various interior materials and various miscellaneous goods using liquid silicone rubber coating solutions, and particularly, to a method for manufacturing synthetic leather having physical properties optimized so as to be suitable for a use using a different textile according to the use thereof.

Claims

1. A method for manufacturing synthetic leather using different liquid silicone rubber (LSR) coating solutions, the method comprising:

performing primary coating on release paper using a first coating solution containing a first liquid silicone rubber (LSR) having a shore hardness (shore A) of 50 or more and an elongation less than 300%;

performing secondary coating on the release paper coated with the first coating solution using a second coating solution containing a second liquid silicone rubber (LSR) having a shore hardness (shore A) less than 50 and an elongation 300% or more;

uniting the release paper coated with the second coating solution with a textile and drying the united textile; and

separating the release paper from the textile united with the release paper.

2. The method of claim 1, further comprising, after the separating of the release paper, surface treating a surface from which the release paper is separated using a silicone surface coating agent.

3. The method of claim 1, wherein the textile is woven using a spun yarn made of at least one fiber selected from a group consisting of aramid fiber, oxidized pan fiber (OPF), and shrinkage fiber, and the synthetic leather is used as an interior material of an aircraft or a ship.

4. The method of claim 1, wherein the textile is woven using polyester fiber, and the synthetic leather is used as an interior material of a vehicle or furniture or used for miscellaneous goods.

5. The method of claim 1, wherein the textile is woven using a sea-island type fiber non-woven fabric composed of polyester and nylon, and the synthetic leather is used as an interior material of a vehicle or furniture or used for miscellaneous goods.

6. The method of claim 5, wherein in the textile woven using the sea-island type fiber non-woven fabric, the number of piles of an island component is 150 to 200 ea/mm², and a cross-sectional area is 200 to 400 μ

m².

7. A synthetic leather having a structure in which a first coating layer containing a first liquid silicone rubber (LSR) having a shore hardness (shore A) of 50 or more and an elongation less than 300% is laminated on a textile by a second coating layer containing a second liquid silicone rubber (LSR) having a shore hardness (shore A) less than 50 and an elongation of 300% or more.