Glass-fiber-reinforced spacer for insulating glazing unit
First Claim
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1. A spacer for an insulating glazing unit, the spacer comprising:
- a polymeric main body comprising two parallel side walls that are connected to one another by an inner wall and an outer wall,whereinthe two parallel side walls, the inner wall, and the outer wall surround a hollow chamber,a thickness of the inner wall, the outer wall and the two parallel side walls is the same,the polymeric main body has a glass fiber content of 0 wt.-% to 40 wt.-%,the polymeric main body comprises hollow spaces obtained by addition of at least one foaming agent to the polymeric main body,the hollow spaces provide a weight reduction of 10 wt.-% to 20 wt.-% of the main body, andan amount of the foaming agent added is 0.5 wt.-% to 1.5 wt.-%.
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Abstract
A spacer for insulating glazing units is presented. The spacer has a polymeric main body with features that include two parallel side walls that are connected to one another by an inner wall and an outer wall. The side walls, the inner wall, and the outer wall surround a hollow chamber. According to one aspect, the polymeric main body has a glass fiber content of 0 wt.-% to 40 wt.-%, to which 0.5 wt.-% to 1.5 wt.-% of a foaming agent is added to form hollow spaces that provide a weight reduction of the polymeric main body of 10 wt.-% to 20 wt.-%.
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Citations
19 Claims
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1. A spacer for an insulating glazing unit, the spacer comprising:
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a polymeric main body comprising two parallel side walls that are connected to one another by an inner wall and an outer wall, wherein the two parallel side walls, the inner wall, and the outer wall surround a hollow chamber, a thickness of the inner wall, the outer wall and the two parallel side walls is the same, the polymeric main body has a glass fiber content of 0 wt.-% to 40 wt.-%, the polymeric main body comprises hollow spaces obtained by addition of at least one foaming agent to the polymeric main body, the hollow spaces provide a weight reduction of 10 wt.-% to 20 wt.-% of the main body, and an amount of the foaming agent added is 0.5 wt.-% to 1.5 wt.-%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 17, 18, 19)
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13. A method for producing a spacer for an insulating glazing unit, the spacer comprising
a polymeric main body comprising two parallel side walls that are connected to one another by an inner wall and an outer wall, wherein the two parallel side walls, the inner wall, and the outer wall surround a hollow chamber, a thickness of the inner wall, the outer wall and the two parallel side walls is the same, the polymeric main body has a glass fiber content of 0 wt.-% to 40 wt.-%, the polymeric main body comprises hollow spaces obtained by addition of at least one foaming agent to the polymeric main body, the hollow spaces provide a weight reduction of 10 wt.-% to 20 wt.-% of the main body, and an amount of the foaming agent added is 0.5 wt.-% to 1.5 wt.-%, the method comprising: -
preparing a mixture of at least one polymer, color masterbatch, and a foaming agent; melting the mixture in an extruder at a temperature of 170°
C. to 230°
C.;based on the melting, decomposing the foaming agent and foaming molten material with a gas; pressing the molten material by a mold, thereby obtaining the polymeric main body, stabilizing the polymeric main body; and cooling the polymeric main body. - View Dependent Claims (14, 15, 16)
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Specification