Recyclable Plastic Products and Methods of Making and Using Same

    公开(公告)号:US20240083071A1

    公开(公告)日:2024-03-14

    申请号:US18242959

    申请日:2023-09-06

    申请人: Joseph Ross

    发明人: Joseph Ross

    IPC分类号: B29B17/00 B29C71/00

    摘要: Methods are provided for making and recycling recyclable food grade plastic products from recycled, post-consumer plastic. The recyclable food grade plastic products may have wash away labels with printed text, graphics, or images that can be easily removed such that the plastic product may be recycled into FDA-approved food grade (i.e., food safe) plastic that is capable of being reused to manufacture new recyclable food grade products.

    METHOD FOR RECYCLING WASTE IN THE FORM OF FLAKES

    公开(公告)号:US20240058993A1

    公开(公告)日:2024-02-22

    申请号:US18260687

    申请日:2022-01-07

    申请人: REPLACE

    IPC分类号: B29B17/00

    CPC分类号: B29B17/0042 B29K2105/26

    摘要: The invention relates to a method for recycling waste in the form of flakes containing plastics-based materials, the flakes; —compacting the flakes and feeding them into a plasticizing tool; —melting and kneading the flakes in the plasticizing tool; —injecting the extruded material under high pressure into a mould to form a component; —using the decomposition gases generated by the heating and the pressurizing of the material recycled in the plasticizing tool to lubricate the material as it is injected into the mould and to compensate for the shrinkage of the material as it cools without supplying additional gas; —cooling the mould; —extracting the component from the mould.

    PROCESS FOR RECYCLING PROPYLENE-ETHYLENE COPOLYMERS

    公开(公告)号:US20240002559A1

    公开(公告)日:2024-01-04

    申请号:US18247342

    申请日:2021-09-27

    申请人: Borealis AG

    摘要: The present invention provides a process for recycling propylene-ethylene copolymers to obtain polymers having good optical and mechanical properties, as well as good processability. The invention further provides propylene-ethylene copolymer pellets obtained from the process, articles comprising or consisting of such pellets and the use of the propylene-ethylene copolymer pellets for injection molding applications. The process comprising the steps of (a) polymerizing propylene and ethylene in the presence of a single site catalyst in a continuous polymerization reactor under dynamic conditions, (b) collecting the resulting propylene-ethylene copolymer powders from step (a) to obtain a mixture (M) of propylene-ethylene copolymer powders having a MFR2 (ISO 1133, 230° C., 2.16 kg) in a raffle of from 1.5 to 80.0 g/ 10 min and an ethylene content in a range of from 1.0 to 4.0 wt. % based on the total weight of the mixture (M), (c) compounding said mixture (M) in an extruder in the presence of a radical initiator, and a clarifying agent in an amount of from 0.01 to 1.0 wt. %, based on the total weight of the mixture of propylene-ethylene copolymer powders, and (d) extruding the above mixture into pellets; wherein, in step a), the dynamic conditions are such that the ethylene content and the melt flow rate (MFR2) of the resulting copolymer gradually changes from a first predetermined ethylene content, E1, to a second predetermined ethylene content, E2, and from a first predetermined melt flow rate, MFR2-1, to a second predetermined melt flow rate, MFR2-2; wherein collecting the copolymer powders in step b) is started when the polymer produced in step a) has a first ethylene content, E1, and a melt flow rate MFR2-1, and collecting the copolymer powders in step b) is stopped when the polymer produced in step a) has a second ethylene content, E2, and a melt flow rate MFR2-2; and wherein said pellets obtained in step d) have (i) a MFR2 (ISO 1133, 230° C., 2.16 kg) in the range of from 20 to 120 g/10 in, (ii) a ratio of MFR2 pellets/MFR2 powder>1, (iii) an ethylene content in a range of from 1.0 to 4.0 wt %, (iv) a crystallization temperature Tc, determined by DSC according to ISO 11357-3:1999 in the range of from 100 to 125° C., and (v) a flexural modulus, determined in a 3-point-bending according to ISO 178 on injection molded specimens of 80×10×4 mm, prepared in accordance with EN ISO 1873-2, of 850 MPa or more.