Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/62—Plasma-deposition of organic layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/12—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to leather
• • C—CHEMISTRY; METALLURGY
  • C14—SKINS; HIDES; PELTS; LEATHER
  • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
  • C14C11/00—Surface finishing of leather

Definitions

• the invention relates to a novel leather and a Dressing process to obtain special property profiles.
• the previous dressing of the leather shows that the leather modified in this way is not meets all demands.
• the demand for better UV resistance or prevention or Reduction of the evaporation of fats the so-called fogging effect. So far tried to avoid this effect by using volatile plasticizers less volatile were replaced.
• the basis of the invention The task is to propose a leather that has the aforementioned disadvantages excludes, is easy to manufacture and the areas of application and the Service life of the leather increased.
• the surface of the leather and that Collagen scaffold is covered with a functional protective layer, covering the pores stay unclogged.
• the surface of the leather consists of a layer of protein fibers, while underneath is the collagen structure consisting of collagen fibers is located, whose webs run irregularly crisscross collagen fibers form.
• the framework is connected across the width of the leather.
• the leather according to the invention is characterized in that the surface located protein fibers individually from a protective layer z. B. made of silicone or Polyurethane are sheathed without the fibers sticking to the breathability with special needs. The same applies to the fibers of the collagen structure without the Pores are glued.
• This dressing is carried out according to the invention in plasma technology at atmospheric pressure ..
• the leather is treated with plasma technology to achieve the implantation and coating. Surprisingly, it has been shown that when the tanned leather is treated as a substrate with ionized gas by discharge under atmospheric pressure, the matrix particles are deposited on the surface of the leather, that is to say the individual protein fibers, and the leather collagen skeletons are implanted or implanted.
• the matrix particles preferably consist of silicone or polyurethane.
• functional layers include: B. SiO 2 , TiO 2 , PU, silicone and indium doped with TiO (known in the art as ITO) as UV protection.
• the art of the type of dressing according to the invention is that wafer-thin layers are applied to and / or into the leather without the appearance and natural properties such as suppleness and breathability are impaired.
• the collagen structure is like a random fiber fleece. In contrast to textile fiber fleece, the fiber structure is a coherent fiber structure.
• Each scaffold fiber is covered. The particles can also be implanted. The scaffold remains open and is not sealed.
• the dressing according to the invention has the advantage that it takes place dry, instead of the known wet treatment, followed by drying, and wherein more importantly, a coating of the surface as well as a
• the collagen structure is encased without the natural properties of the Leather substrates such as suppleness and breathability are impaired, as is the case with the known dressing processes.
• the leather is trimmed according to the invention with a dry plasma treatment become.
• This type of treatment has the advantage that not only of the matrix the leather surface, but also the underlying collagen structure is recorded. This dressing process is also very energy efficient. No water is used and polluted.
• the Matrix particles have high kinetic energy and turbulent movements in run in different directions.
• the creation of a pulsed Voltage at the voltage field of a plasma reactor at atmospheric pressure required, the frequency of the individual pulses in the ultrasound range and the Peak voltage is in the kiloelectron vol range (KeV).
• the pulses can have the same polarity.
• the atmospheric plasma is particularly characterized in that the treatment takes place under atmospheric pressure and the gas discharge current through the Use of multiple plasma torches from so-called guns is generated.
• the matrix material is in the form of a powder or in liquid form introduced the gas flow.
• the matrix material is nebulized by the plasma flow worn and applied and applied to the substrate with great energy.
• Both known methods of atmospheric plasma is with gaseous (monomers) and liquid matrix materials.
• Powdery matrix material can also adhere firmly to the fibers and scaffold to be brought.
• the leather skin consists of a more or less dense network of collagen fibers, that should be as uniform as possible and what also with one good leather is the case.
• the collagen network is made by the plasma treatments coated with the matrix particles and even partially penetrated without chemical properties of the leather are changed and especially breathability preserved. With the application of this treatment, a refined Product that has never existed in this quality.
• the leather according to the invention is against UV radiation as well resistant to the evaporation of fats without suffering from suppleness, because the fats remain inside the leather. This will stop using the so treated leather even at high temperatures, for example in summer in Possible inside a motor vehicle, since drying out is avoided.
• the coating increases the abrasion resistance and makes cleaning easier.
• the leather according to the invention is more universal usable and can often replace artificial leather, so that the environment less with the emissions of carbon dioxide that occur during the production of synthetic leather is burdened, because synthetic leather is a petroleum derivative, in its manufacture and disposal carbon dioxide is generated. Natural leather is in contrast to Artificial leather is a renewable raw material that is carbon dioxide neutral.
• the pre-programming of different substrate properties through the choice suitable reaction gases and matrix materials also enable an anti-fungicide and antibacterial treatment of the leather according to the invention so that it can also find its way into medical technology. It is also within the Possibilities to clean the leather substrate before starting the finishing process undergo activation, d. H. the substrate for the Dressing is made more receptive.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Plasma & Fusion (AREA)
• Physics & Mathematics (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Treatment And Processing Of Natural Fur Or Leather (AREA)
• Treatment Of Fiber Materials (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Applications Claiming Priority (2)

Publications (2)

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Cited By (2)

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Citations (5)

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• 2000
  • 2000-03-30 DE DE10015555A patent/DE10015555A1/de not_active Withdrawn
• 2001
  • 2001-03-28 AT AT01107634T patent/ATE278809T1/de not_active IP Right Cessation
  • 2001-03-28 DE DE50103936T patent/DE50103936D1/de not_active Withdrawn - After Issue
  • 2001-03-28 EP EP01107634A patent/EP1138788B1/fr not_active Expired - Lifetime
  • 2001-03-29 US US09/821,878 patent/US6610368B2/en not_active Expired - Fee Related

Patent Citations (5)

Non-Patent Citations (2)

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