Flame-retardant smoke-suppressing polylactic acid composite material and preparation method thereof

Abstract

The invention discloses a flame-retardant smoke-suppressing polylactic acid composite material and a preparation method thereof. The polylactic acid composite material comprises polylactic acid resin and a plasma-state solid material serving as a flame retardant, wherein the plasma-state solid material is a solid material with a large number of free electrons. The preparation method comprises the following steps of: S1, preparing a composite polylactic acid master batch by using a certain amount of low-dimensional plasma-state solid material and polylactic resin; and S2, preparing the polylactic acid composite material from a certain amount of the composite polylactic acid master batch and an equal amount of polylactic acid resin. Knitted fabric made of the polylactic acid composite material is difficult to ignite in butane gas flames under the standard air condition, can be self-extinguished after being occasionally ignited and away from the fire, has no obvious molten drop phenomenon, and also has no phenomenon that cotton flock on the lower side is on fire. In addition, in a cone calorimeter test, compared with common phosphorus-containing flame-retardant polylactic acid fibers, the density of smoke generated by the polylactic acid composite material in combustion is obviously reduced by more than 50%.

Description

technical field [0001] The invention relates to the field of preparation of functional green fibers, in particular to a flame-retardant and smoke-suppressing polylactic acid composite material and a preparation method thereof. Background technique [0002] With the application and popularization of biodegradable green polylactic acid resin, the flammability and safety problems of its related products need to be solved urgently. [0003] For this reason, the Chinese patent whose publication number is CN104031364A discloses a kind of reinforced flame-retardant polylactic acid material, and described reinforced flame-retardant polylactic acid material is mixed by polylactic acid, modified kenaf, boron phenolic resin, polymer polycondensation type phosphate Formed, the mass ratio of the polylactic acid, modified kenaf, boron phenolic resin, polymer polycondensation type phosphate is 70:10:(2.5~10):(10~17.5), the modified kenaf is The kenaf is subjected to alkali treatment, wash...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a flame-retardant and smoke-suppressing polylactic acid composite material for the problem that the existing polylactic acid composite material is prone to produce a large amount of toxic smoke in case of fire due to the use of a large amount of phosphorus-containing flame retardants. , the knitted fabric made of the polylactic acid composite material is difficult to ignite in a butane gas flame under standard air conditions, and occasionally it will self-extinguish after being ignited, there is no obvious droplet phenomenon, and it does not cause cotton underneath chip fire phenomenon