Microencapsulation Technology Shows Great Potential In The Nonwoven Industry.

< p > in the finishing process, with the increasing understanding of the application of microencapsulation technology in the nonwoven industry, microcapsules will be more and more applied to the finishing process of < a href= "http://www.91se91.com/news/index_c.asp" > nonwoven material < /a >. Microencapsulation technology has begun to show great potential in the nonwoven industry.

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< p > < strong > heat storage temperature regulation microcapsule < /strong > /p >

< p > < strong > upgrading < a href= > http://www.91se91.com/news/index_c.asp > nonwoven < /a > fabric temperature control function < /strong > /p >

< p > the Triangle company of the United States announced the synthesis of a heat storage thermoregulation microcapsule with a diameter of 15 m to 40 m, which has the function of absorption and release of heat energy, and used it to finish the fabric surface and obtained the non-woven fabric with temperature adjustment function.

In the wet spinning process of polyacrylonitrile, Triangle added heat storage thermostat microcapsules with a mass fraction of about 7%. The fibers were extruded through spinneret, and the microcapsules were directly embedded in the fibers, so that the phase change substances in the capsules were more stable in the fabric.

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< p > heat storage thermoregulation microcapsules are coated with certain polymer materials in a specific temperature range, and are made of microcapsule solid particles with a diameter of about 1~30 m m.

The core material selected for the heat storage and temperature regulating microcapsule is paraffin paraffin, and the wall material requires better film forming and chemical stability, so as to prevent core material from penetrating under external force.

The process of heat storage and temperature regulation microcapsule finishing is as follows: preparation of heat storage thermostat microcapsules, and the use of impregnation method to finish nonwovens (two immersion two rolling), pre drying and baking, and made of adjustable temperature regenerative nonwovens can be used as cushion materials, curtain < a href= "http: //www.91se91.com/news/index_c.asp" > fabric > /a > wall cloth, etc.

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Figger, executive vice president of P Triangle, said that the application of microencapsulation technology in Nonwovens mainly utilized 3 properties of microcapsules.

First, the isolation performance, some photosensitive, thermo sensitive or biological materials are embedded as core materials, and when needed to release, the materials can be released by means of light, heat, pressure and biological action to destroy the wall material. Two, the slow release performance, the core material gradually permeates and volatiles through the wall, prolongs the time of action, and the three is the foaming property. When the microcapsule is at a certain temperature, the core material is vaporized, and the wall material is expanded to form a bubble, which can achieve the purpose of foaming, which is mainly used for foaming printing.

The synchronous application of these three technologies is the most important factor for the temperature adjustment of nonwovens.

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< p > < strong > disinfection finishing microcapsules < /strong > /p >

< p > < strong > protect workers from being attacked by drugs > /strong > /p >

< p > Germany Sandler has introduced a microcapsule that can be used for protective clothing.

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Klaus, senior sales manager of P Sandler Asia, points out that workers in some departments may be exposed to various toxic chemicals. There is an urgent need for protective clothing to protect workers from chemical attacks.

Before producing such protective clothing, there are two different ways to arrange the fabric. One is to use activated carbon to treat the fabric, but the problem of desorption after the adsorption of the active carbon is not yet well solved. Two, the fabric is treated with chloramides, the disadvantage is that it easily releases hypochlorite under certain humidity, which can cause skin inflammation.

And the disinfection and finishing microcapsule can overcome these shortcomings in the finishing process of nonwoven fabric.

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"P >" encapsulating the reactive chemical disinfectant in the wall material of semi permeable polymer to make microcapsules. The reactive chemical disinfectant can not penetrate and pass through the wall material.

If the toxic chemicals are selectively injected into the microcapsules through the wall material, the reactive chemical disinfectants are reacted inside the microcapsules and toxic chemicals to achieve the purpose of disinfection.

Reactive chemical disinfectants in microcapsules do not produce harmful stimulants on human skin. They can also be fixed in Nonwovens through resin finishing and are not decomposed by heat, moisture and light.

The application of chemical disinfectant microcapsule in protective clothing is a new research direction of chemical protective clothing.

Klaus explains.

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< p > in addition, the disinfectant microcapsule can also be used in conjunction with UV absorber microcapsules.

UV absorber microcapsules can avoid molecular decomposition caused by ultraviolet radiation for a long time and improve UV protection.

The anti UV microcapsule finishing process is to prepare UV resistant microcapsules and evenly apply them to nonwovens, roll the microcapsules on the nonwoven fabric, and let the UV absorbers be absorbed by the nonwovens and then dry.

"Disinfection and finishing microcapsules and anti ultraviolet microcapsules can make outdoor workers free from the trouble of direct sunlight and protect themselves from harm."

Klaus said.

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< p > strong > nano microcapsule < /strong > /p >

< p > < strong > perfect implementation of multi function superposition application < /strong > < /p >

< p > Alkex company in Britain is now developing nanotechnology and microencapsulation technology and developing nano microcapsules that are still in development.

The nanocapsule has the advantages of microencapsulation and nano particles, and has good prospects in the field of nonwovens.

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According to the experimental results, nanosized microcapsules can perfectly realize the superposition of multiple functions, according to Searl, technical assistant director of P Alkex.

The preparation of honeycomb fiber materials by embedding gas is a successful application example. The nanofibers can be used for high-performance sports or space clothing materials. The rare earth far-infrared thermal insulation health care material is another example of nano microcapsule used in nonwovens, which is expected to be used in the production of clothing lining, bedding and shoes and caps, and has good medical and health care functions.

In the near future, nanocapsules will also act as carriers of sensors or drugs in fiber and play their role in medical treatment.

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< p > "the company is now trying to add aromatic products to the nonwoven materials processed by nano microcapsules, so that the products will have attractive odor while providing good performance."

Tke Searl said.

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