Low compression-force TPE weatherseals
A weatherseal has a stiffener and a foam profile. A first portion of the foam profile is connected to the stiffener. A second portion of the foam profile is joined to the first portion at a hinge. The first and second foam profile portions have inner surfaces facing substantially towards each other and outer surfaces facing substantially away from each other. The foam profile defines at least one continuous elongate lumen. A portion of the foam profile has a resin coating.
1. A weatherseal comprising:
a stiffener configured to be inserted into a kerf of a doorframe; and
a foam profile comprising:
a first profile portion connected to the stiffener;
a second profile portion comprising a tip;
an elongate section extending between the first profile portion and the second profile portion;
two hinges bounding the elongate section, wherein a first hinge is formed between the first profile portion and one end of the elongate section and a second hinge is formed between the second profile portion and the other end of the elongate section, wherein the first hinge and the second hinge each define a portion of the foam profile that bends when the tip of the second profile portion is acted upon by an external force, and wherein each hinge has a first portion of foam material that is under compression and a second portion of foam material that is under tension during bending; and
an inner surface and an opposite outer surface, wherein when the foam profile bends, the inner surface is under compression and the outer surface is under tension, and wherein when each hinge bends, the first portion of foam material is proximate the inner surface and the second portion of foam material is proximate the outer surface.
2. The weatherseal of claim 1 , wherein when the foam profile is in an uncompressed position, the second profile portion is disposed at an acute angle to the first profile portion.
3. The weatherseal of claim 1 , wherein upon application of the external force to the tip of the second profile portion, the second hinge bends prior to the first hinge.
4. The weatherseal of claim 1 , wherein the stiffener comprises a first leg and a second leg, wherein the first leg is connected to the first profile portion.
5. The weatherseal of claim 4 , wherein the elongate section defines a longitudinal axis, and wherein the longitudinal axis is substantially orthogonal to the first leg of the stiffener.
6. The weatherseal of claim 4 , wherein the first profile portion is connected to the first leg along substantially all of a width of the first leg.
7. The weatherseal of claim 1 , wherein the weatherseal further comprises a resin coating at least a portion of the outer surface.
8. The weatherseal of claim 7 , wherein the resin coating on the first profile portion is reinforced.
9. The weatherseal of claim 1 , wherein the first profile portion has a cross-sectional shape different than a cross-sectional shape of the second profile portion.
10. The weatherseal of claim 1 , wherein at least one of the first profile portion and the second profile portion defines a lumen.
11. The weatherseal of claim 1 , wherein the first profile portion defines a first lumen, and wherein the second profile portion defines at least one second lumen.
12. The weatherseal of claim 1 , wherein the foam profile comprises a closed-cell foam.
13. The weatherseal of claim 12 , wherein the closed-cell foam is thermoplastic elastomer (TPE).
14. The weatherseal of claim 12 , wherein the closed-cell foam is ethylene propylene diene monomer (EPDM).
15. The weatherseal of claim 1 , wherein the foam profile comprises a compression load deflection of less than about 1.25 pounds per foot, when compressed to a thickness of about ⅜ inch at a rate of about 1 inch/minute.
16. The weatherseal of claim 1 , wherein the stiffener is substantially rigid.
17. The weatherseal of claim 1 , wherein when the foam profile is in a compressed position, an overcompression volume is defined between the first profile portion and the second profile portion.
18. The weatherseal of claim 17 , wherein when the foam profile is in an overcompressed position, the second profile portion is disposed at least partially within the overcompression volume.
19. The weatherseal of claim 1 , wherein a lumen is defined within the elongate section.
20. The weatherseal of claim 1 , wherein the weatherseal is configured to resist water penetration.