Halogen-free flame-retardant high-density polyethylene material and preparation method and application thereof

Abstract

The embodiment of the invention provides a halogen-free flame-retardant high-density polyethylene material and a preparation method and application thereof. According to the halogen-free flame-retardant high-density polyethylene material, the flame-retardant property UL94 reaches a V-2 level, the mechanical property is excellent, and the elongation at break of a workpiece reaches 842%; the material can be recycled, is environment-friendly and halogen-free, does not generate corrosive gases during combustion and has excellent self-extinguishment; and the problem that in the prior art, a halogen-free flame-retardant technology of HDPE has an environment-friendly problem in mechanical property and bromine-antimony flame retarding is solved.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to a halogen-free flame-retardant high-density polyethylene material, a preparation method and an application. Background technique [0002] High Density Polyethylene (HDPE for short) is a white powder or granular product, non-toxic, tasteless, with a crystallinity of 80%-90%, a softening point of 125-135°C, and a service temperature of up to 100°C. The hardness, tensile strength and creep of HDPE are superior to that of low-density polyethylene. It has better wear resistance, electrical insulation, toughness and cold resistance, and good chemical stability. It is insoluble in any organic solvent at room temperature. HDPE is resistant to acid, alkali and various salts. The film has low permeability to water vapor and air, low water absorption, poor aging resistance, and environmental stress cracking resistance is not as good as low-density polyethylene....

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Problems solved by technology

[0003] At present, the flame retardants commonly used in HDPE in the market are halogen antimony flame retardant system, hydroxide system and APP flame retardant system. The advantage of halogen flame retardants is that the flame retardant performance is stable, and can be prepared according to requirements to meet the various standards of UL. Flame-retardant HDPE, the main disadvantage is that it generates more smoke when burning, and produces corrosive and toxic gases, forming secondary pollution

With the increasing awareness of environmental protection and the gradual attention of environmentally friendly flame retardants, the application of halogenated flame retardants has been increasingly restricted

However, the addition of flame retardants in the hydroxide system and the APP flame retardant system is large, the mechanical properties are severely damaged, and only one flame retardant level can be achieved.

[0004] For some HDPE products that require halogen-free flame retardancy, such as some non-load-bearing plastic boxes and trash cans, etc., the requirements for flame retardancy are relatively low, and they are required to meet UL94 V-2. The flame retardant does not precipitate, but it requires high toughness. Some flame retardant technologies cannot meet market demand

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