238results about How to "Avoid potential hazards" patented technology

The invention relates to pure polylactic acid tows and a cigarette filter trip of the pure polylactic acid tows. The pure polylactic acid tows are made of a spinning raw material formed by blending L-polylactic acid and D-polylactic acid (dextrorotation polylactic acid), wherein the L-polylactic acid accounts for 90-98% of the total weight, and the D-polylactic acid accounts for 2-8% of the total weight. The pure polylactic acid tows are spun by a conventional two-step process cigarette polypropylene staple melt spinning technology. The pure polylactic acid tows can be used for producing the cigarette filter trips with different hardness and have the advantages of being capable of effectively inhibiting molds and harmful bacteria in tobacco shreds and on the surfaces of cigarette holders, having compete biodegradability within three months and obvious mechanical affinity on carbonyl compounds in smoke gas and being capable of effectively intercepting harmful matters such as formaldehyde, acrolein and crotonaldehyde in smoke gas; and the interception efficiency of the pure polylactic acid tows is improved by more than 20% in comparison with the interception efficiency of a cellulose acetate filter trip.

The invention discloses inner column type umbrella-shaped expanding equipment and an expanding method thereof. The inner column type umbrella-shaped expanding equipment comprises an umbrella-shaped expanding device and a plurality of longitudinally-distributed inner columns; and the inner columns are pressure-bearing columns I or telescopic pressure-bearing columns or telescopic pull rods; when the number of the inner column is one, the inner column is located on the central axis of the umbrella-shaped folding rod set; when the number of the inner columns is larger than or equal to two, the multiple inner columns are distributed around the central axis of the umbrella-shaped expanding body device; the inner columns are combined or independently arranged; the combined arrangement of the inner columns comprises combined arrangement of a tie bar disc and the front end of the inner column and / or combined arrangement of a tie bar penetrating disc and the rear end of the inner column; when the inner columns are the pressure-bearing columns I, one ends of the pressure-bearing columns I are hinged to the front ends or the rear ends of all the folding rods, and the other ends of the pressure-bearing columns I are located between the front end and the rear end of the umbrella-shaped folding rod set; and when the inner columns are the telescopic pressure-bearing columns or the telescopicpull rods, the two ends of the telescopic pressure-bearing columns or the telescopic pull rods are fixedly connected with the front end and the rear end of the umbrella-shaped folding rod set respectively. The inner column type umbrella-shaped expanding equipment and the expanding method thereof are used for achieving the purpose of optimizing the pre-collection type three-hinge pressure-bearing structure.