Oral care implement

Patent metadata

Field	Value
Publication number	US-10925384-B2
Application number	US-201815953595-A
Country	US
Kind code	B2
Filing date	Apr 16, 2018
Priority date	Apr 16, 2018
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

Described herein is an oral care implement comprising a body having a head portion, a gripping portion, and a neck portion located between the head and gripping portions, a plurality of tooth engaging elements extending from the head portion, the body comprising a first component formed of a first hard plastic having a first ductility; and a second component formed of a second hard plastic having a second ductility that is greater than the first ductility.

First claim

What is claimed is:

1. An oral care implement comprising:
a body having a head portion, a gripping portion, and a neck portion located between the head and gripping portions;
a plurality of tooth engaging elements extending from the head portion;
the body comprising:
a first component formed of a first hard plastic having a first ductility; and
a second component formed of a second hard plastic having a second ductility that is greater than the first ductility;

wherein each of the first component and the second component comprise a portion of the head portion, the neck portion, and the gripping portion of the body; and
wherein the first hard plastic is polypropylene homopolymer and the second hard plastic is an impact modified polypropylene.

2. The oral care implement according to claim 1 , wherein the first hard plastic has a first ductility and the second hard plastic has a second ductility, the ratio of the second ductility to the first ductility ranging from about 1.5:1.0 to about 4.0:1.0.

3. The oral care implement according to claim 1 , wherein the second component forms a portion of an exposed surface of the body.

4. The oral care implement according to claim 3 wherein the second component forms a portion of an exposed front surface of the body and a portion of an exposed rear surface of the body.

5. The oral care implement according to claim 4 wherein the neck portion of the body comprises the portion of the exposed front surface of the body formed by the second component and the portion of the exposed rear surface of the body formed by the second component.

6. The oral care implement according to claim 4 wherein the gripping portion of the body comprises the portion of the exposed front surface of the body formed by the second component and the portion of the exposed rear surface of the body formed by the second component.

7. The oral care implement according to claim 3 the head portion of the exposed rear surface of the body formed by the second component.

8. The oral care implement according to claim 1 wherein first component forms a portion of an exposed first side surface of the body and a portion of an exposed second side surface of the body.

9. The oral care implement according to claim 8 wherein the first component forms an exposed proximal end surface of the body that extends between the exposed first and second side surfaces of the body.

10. An oral care implement comprising:
a body having a head portion, a gripping portion, and a neck portion located between the head and gripping portions;
a plurality of tooth engaging elements extending from the head portion;
the body comprising:
a first component formed of a polypropylene homopolymer; and
a second component formed of an impact-modified polypropylene;

wherein the first component extends from the head portion to the gripping portion and the second component extends from the head portion to the gripping portion.

11. The oral care implement according to claim 10 , wherein the impact modified polypropylene is a polypropylene copolymer comprising co-mer units of ethylene.

12. The oral care implement according to claim 11 , wherein the co-mer units of ethylene are present in an amount ranging from about 1 wt. % to about 5 wt. % based on the total weight of the impact modified polypropylene.

13. The oral care implement according to claim 10 , wherein the impact modified polypropylene is a blend of polypropylene homopolymer and impact modifier polymer.

14. The oral care implement according to claim 13 , wherein the impact modifier polymer is present in an amount ranging from about 2 wt. % to about 10 wt. % based on the total weight of the polypropylene homopolymer and the impact modifier polymer.

15. The oral care implement according to claim 13 , wherein the impact modifier polymer comprises metallocene polyolefin.

16. The oral care implement according to claim 15 , wherein the metallocene polyolefin is polyethylene.

17. An oral care implement comprising:
a body having a head portion, a gripping portion, and a neck portion located between the head and gripping portions;
a plurality of tooth engaging elements extending from the head portion;
the body comprising:
a first component formed of a first material having a first hardness and a first ductility; and
a second component formed of a second material having a second hardness and a second ductility;

wherein the ratio of the first hardness to the second hardness is about 1.1:1 to about 1:1.1 and the ratio of the second ductility to the first ductility ranges from about 1.5:1.0 to about 4.0:1.0;
wherein the first component forms a proximal end and a distal end of the body and the second component comprises a portion of the head portion, the neck portion, and the gripping portion of the body;
wherein the first material is polypropylene homopolymer and the second material is an impact modified polypropylene.

18. The oral care implement according to claim 17 , wherein the first hardness is substantially equal to the second hardness.

19. The oral care implement according to claim 17 , wherein the ratio of the second ductility to the first ductility ranges from about 2.0:1.0 to about 3.5:1.0.

Assignees

• Colgate Palmolive Co

Inventors

• Hohlbein Douglas
• Wong Chi Shing

Classifications

• C08L23/142

  at least partially crystalline copolymers of propene with other olefins · CPC title

• C08L23/12

  Polypropene · CPC title

• C08L23/06

  Polyethylene · CPC title

• B29C45/1676

  using a soft material and a rigid material, e.g. making articles with a sealing part · CPC title

• B29C45/00

  Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor (injection blow-moulding B29C49/06) · CPC title