Site News  |   Monitor Keywords  |   Monitor Archive  |   Organizer  |   Account Info  |

Dna counterfeit-proof fiber together with spinning nozzle and method used to produced thereof

Dna counterfeit-proof fiber together with spinning nozzle and method used to produced thereof description/claims

The present invention relates to a deoxyribonucleic acid (DNA) counterfeit-proof fiber, the method thereof and the spinning nozzle for manufacturing thereof, and more particularly to the manufacture of the counterfeit-proof fibers for preventing the counterfeiting of textiles.

The counterfeit-proof principle of DNA is by means of the characteristics of unique, complex and difficult to copy of DNA to protect the product from counterfeiting via mixing and/or adhering the DNA with some specific mediums (e.g. the colors, the glue, the resin or the printing ink). Anti counterfeiting by DNA will increase the income and protect the goodwill.

The textiles, adding some specific materials for anti-counterfeiting, have not been sold in the market. At the present day, there are three methods for anti-counterfeiting by adding some specific materials which can be recognized by machines described as follows. The first method is to integrate the vitamin B group into the fiber by plasma surface modification. The second is to graft the fiber and the chitosan by enzyme. The third is to package the specific DNA as the microcapsules and to mix them with the fiber.

The three above methods seem to achieve the purposes of anti counterfeiting rapidly and effective of the textiles and being detected by machines directly. But, after analyzing carefully with the manufacturing process of textiles, it is found that the purposes of anti counterfeiting rapidly and effective of textiles and being detected by machines directly can be achieved only by the third method. The two reasons are introduced as follows.

The first reason is regarding to the effects of scouring and bleaching process. Because the natural fibers mostly contain oil and dust, they need to be washed with the alkali and/or the soap. But the chitin (β-poly-N-acetly-D-glucosamin) and the chitosan (β-poly-D-glucosamin), different from other polysaccharides, are strongly electropositive so that they will bond strongly with some specific chemicals, especially the negatively charged oil. So, if the counterfeit-proof fibers, grafting with the chitosan by enzyme, have been added before washing with the alkali and/or the soap, the chitin and/or the chitosan will fall off during the washing process. In other words, the chitin and/or the chitosan will bond with the oil adhered on the animal or the plant fibers. The chitin and/or the chitosan will solve in the soap-contained washing waste during the scouring and bleaching process and certainly lose the effect for anti counterfeiting of textiles.

The chitin is the only natural monosaccharide in nature. It widely exists in the shell of insects and crustaceans and the cell wall of bacteria. Therefore, the chitin lacks the characteristic of unique since it is easily obtained. Applying the chitin to produce the functional fiber may get well effects, but the chitin seems not appropriate for being used as the counterfeit-proof materials since it is easily counterfeited. Therefore, that the chitin is applied to produce the counterfeit-proof fibers is very limited.

The second reason is regarding to the effects of dyeing the fabric blank at high-pressure and high-temperature. After a textile is produced into a fabric blank, it needs to be processed with a post-manufacturing of dyeing at high-temperature for producing the colorful cloths. Therefore, whatever fabric materials the fabric blank produced therefrom, it needs to be processed with the high-temperature dyeing using several organic and/or inorganic dyes solved in the water. The fabric blank needs to be maintained at the high temperature of 120-200° C. and high pressure surrounding for 20-30 minutes for achieving a better outcome. But, the fibers had anti-counterfeiting and recognized functions by integrating the vitamin B group into the fiber by plasma surface modification, which will be the pyrolysis at the high temperature. Moreover, the water-soluble vitamin B group will be washed out from the fabric blank after being treated with the high pressure and high temperature water. The vitamin B group, similar to the chitin, is easily obtained and lacks the characteristic of unique. Therefore, the vitamin B group applied to produce the counterfeit-proof fibers is very limited.

The third method for anti counterfeiting is using the microcapsule technique to package the specific DNA into the microcapsules and then to mix therewith fibers. Due to the mechanism for anti counterfeiting of this method causing the DNA microcapsules to be mixed with fibers, the DNA microcapsules are not easily lost and the properties of heat-resistance and acid- and alkali-resistance thereof are outstanding. The fibers mixed with the DNA microcapsules maintain the original properties after heating at 250° C. for 40 minutes. Moreover, because of the properties of private and unique, DNA is appropriately applied for anti counterfeiting rapidly and effectively. But how to integrate the DNA microcapsules into the fibers effectively and uniformly and to increase the stability thereof to further produce the fibers had DNA counterfeit-proof technique are big challenges.

A microcapsule consists of a capsule core and a capsule membrane. The capsule membrane can be made by various natural or synthetic high-molecular materials. The diameter of the microcapsule is 10-200 μm and the shape thereof is mostly spherical or polyhedral. The common methods for producing the microcapsule are the separating method and the interfacial polymerization. The technique of the microsapsule had been provided since 1950's, and it was applied to manufacture the printing ink of non-carbon paper originally. Recenly, the microsapsule technique has been applied to the fields of printing, medison, biochemistry and liquid crystal.

Because of the arising of environmental consciousness, the microsapsule technique is also applied to prevent the environmental pollution of industrial waste. For example, in the industry of textiles dyeing and finishing, all the disperse dye, the acid dye, the cationic dye, the vat dye, the reactive dye and the oil-soluble dye can be packaged by microcapsules to be good for processing the waste. Moreover, by means of the microsapsule technique, some special materials can be packaged by the microcapsules and further adhered to textiles to produce the functional textiles. So, the microsapsule technique develops vigorously and is majorly applied to the textiles of dyeing, calico printing, UV absorbing, chemical asepticizing, blanching and adhering.

The processes of wet spinning are making a polymer to become a soluble salt (i.e. the spinning solution) by chemical treatments and spinning the spinning solution to form the silks by a spinning nozzle. The silks are further returned to the solid ones by the coagulation bath. Finally, the silks need to be treated with drafting treatment. Besides, the viscosity of the spinning solution shall be noticed. If the viscosity of the spinning solution is too low, the spinning solution will easily breaks to drops during spinning, but if the viscosity thereof is too high, the spinning solution will pass through the spinning nozzle difficultly. Usually, the low-viscosity and high-density spinning solution can be obtained by increasing the temperature thereof. This kind of spinning solution is easily spun and the silks spun therefrom are highly crystallized.

The above wet spinning spins via a single spinning nozzle locating in the warm acid-hydrolysis solution. But the process of acid hydrolysis is unstable due to the hardly controlled operational environment. The spun silks further need drawing to stabilize the size, and the manufacturing equipments thereof are huge and complex.

In conclusion, when spinning by wet spinning, due to the special characteristics of DNA counterfeit-proof fiber, the spinning nozzle and the spinning processes need to be adjusted for stabilizing the size of fibers and simplifying the manufacturing equipments. But the known spinning nozzles and spinning processes could not meet the above requirements.

In accordance with one aspect of the present invention, a spinning nozzle for producing a synthetic fiber is provided. The spinning nozzle includes a polymer solution inflow passage and a pair of water inflow passages located at the both sides of the polymer solution inflow passage, wherein the polymer solution inflow passage and the pair of water inflow passages are merged into a mixing outflow passage, and the synthetic fibers are produced at an outlet of the mixing outflow passage. The manufacturing equipments of drawing of the traditional spinning processes can be displaced with the spinning nozzle of the present invention, hence the cost will be decreased.

In accordance with another aspect of the present invention, a method for producing a DNA counterfeit-proof fiber is provided. First, mixing a plurality of DNA microcapsules with a material solution to produce a polymer solution. Then, to form a converging interface between the polymer solution and the two streams of acid-hydrolysis waters. Afterwards, to cause the flowing polymer solution to encounter with the two streams of acid-hydrolysis waters for producing the DNA counterfeit-proof fiber. Different forms of DNA counterfeit-proof fibers can be produced by adjusting the conditions of the convergence between the polymer solution and the two streams of acid-hydrolysis waters.

In accordance with another aspect of the present invention, a DNA counterfeit-proof fiber produced by the above method is provided.

In a preferable embodiment, a spinning nozzle includes a polymer solution inflow passage and a pair of water inflow passages, wherein the polymer solution inflow passage providing a polymer solution for producing a synthetic fiber and the pair of water inflow passages located at the sides of the polymer solution inflow passage and supplying two streams of acid-hydrolysis waters. The polymer solution inflow passage and the water inflow passages are merged into a mixing outflow passage and a synthetic fiber is produced at an outlet of the mixing outflow passage.

Preferably, the polymer solution includes a plurality of DNA microcapsules and the synthetic fiber is a DNA counterfeit-proof fiber.

Preferably, the polymer solution is formed by solving Nylon 6 in a formic acid first and then mixing therewith a plurality of DNA microcapsules.

Preferably, the two streams of acid-hydrolysis waters are deionized waters and have a temperature of 60° C.

• Provisional Patent
• Utility Patent

• What Is a Patent?
• What Is a Trademark or Servicemark?
• What Is a Copyright?
• Patent Laws