Retardant nanocomposites

Although the use of fine flame can effectively improve the flame retardancy of the polymer,

but there are some problems, such as can not effectively control the release of toxic gases

and the generation of a lot of smoke, flame retardant will affect the mechanical properties

of the polymer , will result in a certain environment

Affected. Therefore, the study and the polymer / layered inorganic nanocomposites will be

able to meet the above requirements and has good flame retardant properties. Nanocomposites

are in effect one or more of the material with nano size or molecular level uniformly

dispersed in another

Matrix components. According to foreign sources, the treated material due to the presence

of ultra-fine size, so its properties than the corresponding macro-or micro-grade

composites are greatly improved. Currently in the laboratory has prepared nano epoxy resin,

polystyrene

, Polypropylene, nylon-6, composite materials such as acrylic. Such as nylon-6 /

montmorillonite (4.2%) nanocomposites tensile strength than pure nylon-6 increase 50%, the

glass transition temperature than pure nylon-6 increased about 90 ℃; while heat release

efficiency than pure nylon - 6 to be very low in

More.
Polymer / layered inorganic nanocomposite filler than conventional far superior mechanical

properties, thermal properties, flame retardancy, anisotropy. Abroad has polymer / layered

inorganic nanocomposites for the manufacture of automotive engine parts, and prepare

Used in aircraft interior materials, fuel tanks, electronic or electrical components,

structural components within the housing, brake and tire manufacturing.
An oxide nano plastic flame retardant (CuO, ZnO, Fe2O3, etc.) and complex compound, its method of

preparation to use more liquid phase prepared nanoparticles. There are the usual liquid-

phase method: direct precipitation, sol - gel method, co-precipitation method. In addition,

microwave synthesis,

Arc method.

Nano superfine powder flame retardant material

Flame retardants in polymer processing aids is one of the important, if the use of

nanotechnology polymer materials for fire-retardant treatment, flame resistance can be

achieved and self-interest. Currently, the majority of used inorganic flame retardants,

antimony-based flame retardant which include

, Aluminum-based flame retardants, phosphorus flame retardants and boron-based flame

retardants. As these flame retardants added to the polymer, causing the polymer processing

and product properties change, especially molded products, extruded products and film

products surface finish effects than

Large, so the need for all inorganic plastic flame retardant additive type ultrafine particle size.

Currently used as an additive flame retardant largest antimony trioxide, its particle size

and morphology on plastics and textile fabric properties and flame effect is very large.

Granularity trioxide

Important indicator of antimony pentoxide, antimony trioxide only when nanometer size only

when it is in itself has a large surface area, large permeability of the fabric, the

adhesion force, a strong washing fastness , flame-retardant effect is very obvious.
Superfine flame retardants can improve the mechanical properties, reducing the amount of

flame retardants to meet process requirements.
Nano-antimony trioxide flame retardant due to its small particle size has a special

ductility, the flame retardant properties than the micron antimony an order of magnitude

increase. It is particularly important because nanoscale particle diameter of less than

antimony direct chemical fibers

Trail, chemical fiber raw materials may be added to the masterbatch, so after spinning

uniformly distributed in the fiber fire-retardant materials, which makes the fiber itself

has a high flame retardancy.

Flame-retardant cable

Flame retardant cable, refers to the specified test conditions, the sample was burned in the fire after dropping the test, flame spread only within a limited range, residual or residual flame burning in a limited period of time to self-extinguishing cable. Fundamental characteristics are: In case of fire may be burned out and

Can not run, but you can prevent the spread of fire. More simply, wire in case of fire, able to burn restrictions in the local scope, no spread, keep a variety of other devices, to avoid greater losses.
Outline
Retardant meaning: the specified test conditions, the sample was burned in the fire source was removed, the flame spread on the specimen only within a limited range and self-extinguishing characteristics, that have occurred or to prevent or delay the spread of flame capability.
Flame retardant cable
Wire & Cable Cable combustion is generated due to external heating flammable gas, to achieve the purpose of fire, must be suppressed due to the combustion of three elements, namely: combustible gas, heat and oxygen. Therefore, the flame-retardant wire and cable commonly used method is to sheath material

Adding a halogen-containing metal halides and oxides, from the perspective of flame retardant evaluation, which is an excellent method, however, since these materials contain a halide, in the combustion smoke and release large amounts of hydrogen halide, so , when the fire low visibility to

Evacuation and fire safety personnel a great deal of prejudice, while others more for toxic gas suffocation. plastic flame retardant
Moreover, hydrogen halide and water in the air once the reaction, which generated "hydrogen halide acid", severe corrosion equipment, buildings caused by "second disaster."
Now, with increasing levels of technology, flame issues from the past halogen flame-retardant, has been further developed to low halogen, halogen-free flame-retardant. Zhongli Science and Technology Group Co., Ltd. to develop and produce "communication power with a fire retardant flexible cable" is absolutely the cable

Edge of the jacket with a halogen, high decomposition temperature, good mechanical properties of halogen-free polymer materials, due to cable free of halides and metal oxides in the combustion does not produce harmful gases and a lot of smoke, do not poses a "second disaster" possibilities

, And also has good mechanical properties and electrical performance to meet the requirements for use of the cable, flame retardant cable completely changed in the past inadequacies.

Flame retardant engineering plastics

Flame retardant engineering plastics
As the polymer synthesis and processing technology continues to progress, the production of engineering plastics have penetrated into all areas of life people. In a variety of applications, the plastic material is applied to the plastic flame retardant is an important performance indicator, and some plastics additives, such as
Halogen-containing flame retardants as possible on the environment and human health hazard potential, so as to solve this problem, a number of users to abandon the application of engineering plastics these plastic additives and instead use those inherently flame retardant engineering plastics .
Flame retardant engineering plastics
Flame retardant polymers are generally also has other excellent properties, such as strength, dimensional stability, chemical resistance and abrasion resistance, etc., but these materials are typically less than those who do not have a flame retardant material is more expensive.
Flame retardant engineering plastics
However, that require high performance and high flame retardancy applications need these resins to show their talents. These polymers include: polyether ether ketone (PEEK), polyether imide (PEI), polyphenylene sulfide (PPS), polyphenylene sulfone (PPSU), polyether sulfone (PES), polyvinylidene fluoride

Ethylene (PVDF), and liquid crystal polymer (LCP). Other polymers, such as: PVC, modified polyphenylene oxide (PPO) such as a certain degree of flame resistance.

Security plasticizer

PVC is mainly used in packaging wrap film, which, after adding phthalate soft, high transparency, good self-adhesive. Phthalates past that is relatively safe, in limiting the amount added can be used for a food packaging. However, due to widespread use of plastic products and plastic packaging, as time goes by. Phthalates from plastics and other substances gradually transferred to the external environment. Commonly found in airborne particulates, rivers and soil. Many countries of the atmosphere, lakes, rivers and soils have been detected in different concentrations of phthalates. Japan in the 30 rivers 86 monitoring points detected DEHP, the United Kingdom, China and other scientists are also the atmosphere, rivers and environmental sewage detected DEHP, results show that our environment is subject to different levels of DEHP contamination. Phthalates through the respiratory tract, gastrointestinal tract and skin absorption into the body, so that people from the normal intake of food and water will inevitably be some of DEHP, however, under normal circumstances, the amount of intake is difficult to exceed the safe limit.

In the published research papers on the toxicity of DEHP, the researchers through animal experiments (mainly rodents), in vitro experiments or epidemiological survey methods, gradually prove DEHP cause reproductive system damage, liver toxicity, renal toxicity, it There are some uncorroborated potential hazards, including teratogenicity, carcinogenicity. Given these potential health risks, the EU issued a directive 1999/815/EC, the EU member states use by children under three years of age in contact with the mouth of toys and other children's products (such as baby pacifiers, teething, etc.) in the poly vinyl chloride plastics plasticizer content restrictions, requirements contained six kinds of PVC phthalate plasticizers (DEHP, DINP, DNOP, DBP, DIDP, BBP) the total content shall not exceed 0.1% . As the plasticizer in PVC products generally used in an amount of 2% to 70%, which indicates that plastic toys actually disable the DEHP plasticizer, which is still in development stages in order to protect children.

DEHP there are other potential health risks. The myocardial cells in vitro in soaked in DEHP may cause its rhythm abnormalities. However, in the heart of the body and did not find this phenomenon, said long-term exposure to DEHP may cause arrhythmia lacking basis.