Mailbox style sharps container
View Patent ↗A closure ( 26 ) for a medical waste receptacle through which medical waste is deposited is provided. The closure comprises a door ( 20 ) forming at least a portion of the passage, wherein the door is formed from a molded thermoplastic material comprising a polyolefin resin, a nucleating agent and a siloxane processing aid.
1. A closure for a medical waste receptacle providing a passage through which medical waste is deposited, said closure comprising:
a door forming at least a portion of said passage, said door being formed from a molded thermoplastic material further comprising a polyolefin resin, a siloxane processing aid, and a nucleating agent, wherein said siloxane processing aid comprises 2 to 10 percent of the total weight of said door.
2. The closure of claim 1 wherein said siloxane processing aid is a siloxane polymer.
3. The closure of claim 2 wherein said siloxane polymer is an ultra-high molecular weight functionalized siloxane polymer dispersed in polypropylene.
4. The closure of claim 1 wherein an external surface of said door manufactured from said polyolefin resin modified with said siloxane processing aid has a reduced coefficient of friction.
5. The closure of claim 1 wherein said nucleating agent comprises about 1.5 to about 2.5 percent of the total weight of said door.
6. The closure of claim 1 wherein said nucleating agent is a hyper nucleating agent.
7. The closure of claim 6 wherein said hyper nucleating agent improves dimensional stability and reduces warpage of said door.
8. The closure of claim 1 wherein said polyolefin resin of said door is selected from the group consisting of polypropylene, polyethylene, polyethylene terpthalate and polyvinyl chloride.
9. The closure of claim 1 wherein said door is pivotably mounted to said closure.
10. A closure for a medical waste receptacle providing a passage through which medical waste is deposited, said closure comprising:
a door forming at least a portion of said passage, said door being formed from a molded material comprising a polyolefin resin, a siloxane processing aid and a nucleating agent, wherein said nucleating agent comprises about 1.5 to about 2.5 percent of the total weight of said door.
11. The closure of claim 10 wherein said nucleating agent is a hyper nucleating agent.
12. The closure of claim 10 wherein said nucleating agent improves dimensional stability and reduced warpage of said door.
13. The closure of claim 10 wherein said polyolefin resin of said door is selected from the group consisting of polypropylene, polyethylene, polyethylene terpthalate and polyvinyl chloride.
14. The closure of claim 10 wherein said siloxane processing aid comprises 2 to 10 percent of the total weight of said door.