Long glass fiber PP with stable flame-retardant structure and preparation method thereof

Abstract

The invention discloses long glass fiber PP (polypropylene) with a stable flame-retardant structure and a preparation method of the long glass fiber PP. The long glass fiber PP is prepared from the following raw materials in parts by weight: 60-70 parts of polypropylene, 20-35 parts of alkali-free long glass fiber, 15-25 parts of a flame retardant, 0.8-1.5 parts of a compatilizer and 1.1-1.5 parts of an antioxidant, the flame retardant is prepared from the following raw materials in parts by weight: 45 to 60 parts of triphenyl phosphate, 30 to 40 parts of magnesium hydroxide, 30 to 40 parts of aluminum hydroxide and 10 to 15 parts of antimony trioxide. According to the invention, the characteristics of high flame-retardant efficiency and small influence on light stability or light stabilizer of triphenyl phosphate are utilized, the characteristics of obviously slowing down the thermal decomposition speed of the material and good flame-retardant effect of magnesium hydroxide, aluminum hydroxide and antimony trioxide are utilized, and the characteristics of reducing smoke amount of magnesium hydroxide and aluminum hydroxide are utilized; the smoke amount can be reduced while the flame-retardant effect is improved, the situation that a large amount of smoke and toxicity are generated during combustion is avoided, and then the human body and the environment can be effectively protected.

Description

technical field [0001] The invention relates to the technical field of long glass fiber PP, in particular to a long glass fiber PP with stable flame retardant structure and a preparation method thereof. Background technique [0002] Generally speaking, the tensile strength of PP material is between 20M-30MPa, the bending strength is between 25M-50MPa, and the bending modulus is between 800M-1500MPa. If you want to improve the strength performance of PP, you must use glass fiber for Reinforcement, the mechanical properties of glass fiber reinforced PP products can be doubled or even improved, the tensile strength can reach 65MPa-90MPa, the flexural strength can reach 70MPa-120MPa, and the flexural modulus can reach 3000MPa-4500MPa, such The mechanical strength is completely comparable to that of ABS and reinforced ABS products. [0003] Because long glass fiber PP polymers usually have poor flame retardancy and low safety, the application of long glass fiber PP in many field...

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Problems solved by technology

[0003] Because long glass fiber PP polymers usually have poor flame retardancy and low safety, the application of long glass fiber PP in many fields is limited, and the existing long glass fiber PP is often used in order to achieve better flame retardancy By adding bromine, chlorine and other halogen flame retardants during production, although the flame retardant effect is excellent, it will produce a lot of smoke and toxicity when burning, which will cause great harm to the human body and the environment. Therefore, a stable flame retardant structure is proposed. Long glass fiber PP and preparation method thereof

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