Nanotechnology for carton anti-counterfeiting, tracking and monitoring

The application of nanotechnology and nanomaterials in corrugated boxes will provide new ways for the development of corrugated box industry with its excellent features and functions.

First, carton anti-counterfeiting

1. Nano material security

Nanomaterials have excellent sensitivity, and have broad application prospects in terms of temperature sensitivity, gas sensitivity, moisture sensitivity, etc., and can utilize the sensitivity of nanoparticles to prepare temperature (heat) sensitive materials, gas sensitive materials, and moisture sensitive materials, respectively. , and then used as a carton anti-counterfeit packaging.

Generally, the metal particles are black and have the characteristics of absorbing infrared rays, and have large surface area, high surface activity and sensitivity to the surrounding environment (temperature, heat, light, humidity, etc.). Therefore, when nano-particles having these characteristics are added to the packaging material, or made into a paint or a polishing agent to be coated on the surface of the material and used for packaging of the product, people can select heat and light or temperature when selecting the product. Identification to achieve anti-counterfeiting purposes. Namely: The use of nanotechnology can achieve color anti-counterfeiting, physical and chemical effects of anti-counterfeiting and other purposes, so as to improve the level of anti-counterfeiting technology.

2. Nano biotechnology applied to carton anti-counterfeiting

As a biological macromolecule, DNA is the basis of biological genetic material. The core content of modern genetic engineering technology is the molecular manipulation or molecular cloning of DNA. At present, DNA is widely used in non-biological applications, such as biological computers, nanobiology, and DNA for commodity anti-counterfeiting. However, for the use of DNA in product anti-counterfeiting, it was pioneered by Le Page and Slater (Lopage and later 1987). A DNA-based anti-counterfeiting method. The basic process is to add a piece of DNA with a length of 1KB to 10KB as a signal molecule to a specific product, and use the double-stranded complementary property of DNA to obtain a probe DNA molecule, according to isotope or non-isotopically labeled probe DNA molecules and signal DNA. Molecular hybridization signals reveal the presence of signal molecules and determine the authenticity of the product.

The cryptographic marker DNA was incorporated into water and low alcohol (less than 40% alcohol) in a ratio of 1: (10-20) and 1: (10-9), and a 1U1 liquid sample was taken directly. PCR detection also gave The correct result. Attempts are being made to add marker DNA during the production of packaging cartons to facilitate anti-counterfeiting of cartons.

Second, tracking and monitoring

Sensors are an important area of ​​nanotechnology applications. With the advancement of nanotechnology, its cost will be lower and its function will be stronger. The micro-sensors can be installed in the packing box to track and monitor valuables through the global positioning system.

1. Micro sensors installed in the packaging or container, can identify and indicate the packaging space temperature, humidity, pressure, and the degree of sealing, time and other important parameters, especially for packaging products that require long-term storage and transportation.

2. Drop shock is the most severe environmental load during the circulation of packages (products and their internal packaging) and is the main risk affecting the safety of packaged goods. During the fall, the maximum impact acceleration (impact force) experienced by the product is closely related to various factors such as drop height, drop azimuth, package quality, buffer structure, and the sensitivity is proportional to the coverage area of ​​the polar plate, and the coverage area is greater. The higher the sensitivity, the inversely proportional to the square of the polar distance and the smaller the polar distance, the higher the sensitivity. In order to improve the nonlinearity, improve the sensitivity and reduce the influence of external factors (such as power supply voltage, environmental leakage, etc.), it is decided to use a differential capacitive sensor. The sensor is small in size, light in weight, simple in structure, easy in processing, good in dynamic response performance, high in sensitivity, small in electric noise (non-contact measurement), good in temperature stability, wide in applicable temperature range, and ideal for on-site testing of packages during distribution process. Drop height sensor.

Source of information: pack.cn