Circulating utilization type packing material
A packaging material and raw material technology, applied in the field of recycled packaging materials, can solve the problems of limited use range, soil agglomeration, and affecting plant growth, etc., and achieve the effect of high practical value and high strength
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Embodiment 1
[0017] A recyclable packaging material is made of the following raw materials in parts by weight: 30 parts of starch; 30 parts of polylactic acid; 5 parts of plant fiber; and 5 parts of vinyl / vinyl ketone copolymer.
[0018] The preparation process of the above-mentioned recyclable packaging material is as follows: the mixture of raw materials is stirred and mixed, extruded and sheared to change the structure of starch and cellulose, and then granulated by a twin-screw extruder, and then molded. The screw speed of the twin-screw extruder is 100r min -1 , the extrusion temperature was 120°C.
Embodiment 2
[0020] A recycling packaging material is made of the following raw materials in parts by weight: 60 parts of starch; 10 parts of polylactic acid; 15 parts of plant fiber; and 1 part of vinyl / vinyl ketone copolymer.
[0021] The preparation process of the above-mentioned recyclable packaging material is as follows: the mixture of raw materials is stirred and mixed, extruded and sheared to change the structure of starch and cellulose, and then granulated by a twin-screw extruder, and then molded. The screw speed of the twin-screw extruder is 100r min -1 , the extrusion temperature was 120°C.
Embodiment 3
[0023] A recyclable packaging material is made of the following raw materials in parts by weight: 40 parts of starch; 20 parts of polylactic acid; 10 parts of plant fiber; and 3 parts of vinyl / vinyl ketone copolymer.
[0024] The preparation process of the above-mentioned recyclable packaging material is as follows: the mixture of raw materials is stirred and mixed, extruded and sheared to change the structure of starch and cellulose, and then granulated by a twin-screw extruder, and then molded. The screw speed of the twin-screw extruder is 100r min -1 , the extrusion temperature was 120°C.
[0025] The polymer material prepared in the above-mentioned examples adopts the outdoor landfill method. The material is first cut into flakes, and then the flake test pieces are buried in moist soil, and the soil is kept in a dark and humid environment for 50 days. , it was found that the flaky results had been broken down without residue.
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