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A spacer profile for a spacer frame of an insulating pane unit includes a hollow profile body made of plastic with a chamber defined therein. The hollow profile body extends in a longitudinal direction and includes an inner wall, an outer wall, a first side wall and a second side wall, which are con

A spacer profile for a spacer frame of an insulating pane unit includes a hollow profile body made of plastic with a chamber defined therein. The hollow profile body extends in a longitudinal direction and includes an inner wall, an outer wall, a first side wall and a second side wall, which are connected to the inner and outer walls to form the chamber. First and second reinforcing layers made of a metallic material respectively extend on the first and second side walls and partially on the outer wall so as to be spaced apart by a first distance. A diffusion barrier layer is formed directly on the outer wall between the first and second reinforcing layers and is connected thereto in a diffusion-proof manner in order to form a heat-insulating diffusion barrier. An insulating pane unit includes at least two panes with such a spacer frame disposed therebetween.

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1. A spacer profile configured to be used in a spacer frame of an insulating pane unit for door or window or facade elements, the insulating pane unit comprising at least first and second panes having an intervening space defined therebetween, the spacer profile comprising: a hollow profile body mad

1. A spacer profile configured to be used in a spacer frame of an insulating pane unit for door or window or facade elements, the insulating pane unit comprising at least first and second panes having an intervening space defined therebetween, the spacer profile comprising: a hollow profile body made of a synthetic material and having a chamber configured to accommodate hygroscopic material defined therein, the hollow profile body extending in a longitudinal direction (Z) and comprising:an inner wall configured to face towards the intervening space between the panes in an assembled state of the insulating pane unit and to border the chamber,an outer wall disposed opposite to the inner wall in a height direction (Y), which is perpendicular to the longitudinal direction (Z),a first side wall, anda second side wall disposed opposite to the first side wall in a transverse direction (X), which is perpendicular to the longitudinal direction (Z) and to the height direction (Y), the first and second side walls respectively being connected with the inner wall and the outer wall to form the chamber;a first reinforcement layer made of a first metallic material having a first specific heat conductivity (λ1), the first reinforcement layer extending in the longitudinal direction (Z) in one piece at least in part on the first side wall, having a constant cross section perpendicular to and in the longitudinal direction (Z), and having a first thickness (d1);a second reinforcement layer made of a second metallic material having a second specific heat conductivity (λ2), the second reinforcement layer extending in the longitudinal direction (Z) in one piece at least in part on the second side wall, having a constant cross-section perpendicular to and in the longitudinal direction (Z), spaced by a first distance from the first reinforcement layer, and having a second thickness (d2); anda diffusion barrier layer having a third thickness (d3; d33) and a third specific heat conductivity (λ3, λ33), the diffusion barrier layer being disposed on the outer wall at least between the first reinforcement layer and the second reinforcement layer and being connected with the first reinforcement layer and the second reinforcement layer in a diffusion-proof manner to form a diffusion barrier;wherein the multiplication product of the third specific heat conductivity (λ3, λ33) and the third thickness (d3; d33) is less than both (i) the multiplication product of the first specific heat conductivity (λ1) and the first thickness (d1) and (ii) the multiplication product of the second specific heat conductivity (λ2) and the second thickness (d2), and the diffusion barrier layer is disposed substantially on a neutral axis, which is defined by bending the spacer profile by 90° about an axis parallel to the transverse direction (X) with the inner wall lying further inward than the outer wall with reference to the bending radius. 2. The spacer profile according to claim 1, wherein the diffusion barrier layer is made of a third metallic material and the third thickness (d3) is less than both the first thickness (d1) and the second thickness (d2). 3. The spacer profile according to claim 2, wherein: the first specific heat conductivity is between 10 W/(mK)≦λ1≦50 W/(mK) and the first thickness (d1) is between 0.1 mm and 0.3 mm,the second specific heat conductivity is between 10 W/(mK)≦λ2≦50 W/(mK) and the second thickness (d2) is between 0.1 mm and 0.3 mm, andthe third specific heat conductivity is between 14 W/(mK)≦λ3≦200 W/(mK) and the third thickness (d3) is between 0.001 mm and 0.015 mm. 4. The spacer profile according to claim 3, wherein the diffusion barrier layer extends perpendicular to and in the longitudinal direction (Z) in one piece on the outer wall only between the first and second reinforcement layers. 5. The spacer profile according to claim 3, wherein the diffusion barrier layer is not disposed between the hollow profile body and one or both of the first reinforcement layer and the second reinforcement layer. 6. The spacer profile according to claim 1, wherein the diffusion barrier layer is not disposed between the hollow profile body and one or both of the first reinforcement layer and the second reinforcement layer. 7. The spacer profile according to claim 1, wherein the diffusion barrier layer extends perpendicular to and in the longitudinal direction (Z) in one piece on the outer wall only between the first and second reinforcement layers. 8. The spacer profile according to claim 1, wherein the diffusion barrier layer extends perpendicular to and in the longitudinal direction (Z) on at least a part of the first reinforcement layer that faces towards the second reinforcement layer and/or on at least part of the second reinforcement layer that faces towards the first reinforcement layer. 9. The spacer profile according to claim 1, wherein the spacer profile has been bent about the axis parallel to the transverse direction (X) such that an angle of 90° is formed by portions of the outer wall that have been bent relative to each other and the inner wall lies further inwardly than the outer wall with respect to the bending radius, and the diffusion barrier layer between the reinforcement layers is at least substantially uncompressed and unstretched. 10. A spacer profile configured to be used in a spacer frame of an insulating pane unit for door or window or facade elements, the insulating pane unit comprising at least first and second panes having an intervening space defined therebetween, the spacer profile comprising: a hollow profile body made of a synthetic material and having a chamber configured to accommodate hygroscopic material defined therein, the hollow profile body extending in a longitudinal direction (Z) and comprising:an inner wall configured to face towards the intervening space between the panes in an assembled state of the insulating pane unit and to border the chamber,an outer wall disposed opposite to the inner wall in a height direction (Y), which is perpendicular to the longitudinal direction (Z),a first side wall, anda second side wall disposed opposite to the first side wall in a transverse direction (X), which is perpendicular to the longitudinal direction (Z) and to the height direction (Y), the first and second side walls respectively being connected with the inner wall and the outer wall to form the chamber;a first reinforcement layer made of a first metallic material having a first specific heat conductivity (λ1), the first reinforcement layer extending in the longitudinal direction (Z) in one piece at least in part on the first side wall, having a constant cross section perpendicular to and in the longitudinal direction (Z), and having a first thickness (d1);a second reinforcement layer made of a second metallic material having a second specific heat conductivity (λ2), the second reinforcement layer extending in the longitudinal direction (Z) in one piece at least in part on the second side wall, having a constant cross-section perpendicular to and in the longitudinal direction (Z), spaced by a first distance from the first reinforcement layer, and having a second thickness (d2); anda diffusion barrier layer comprising at least a first layer made of a diffusion-proof EVOH-plastic material having a third thickness (d33) and a third specific heat conductivity (λ33), the diffusion barrier layer being disposed on the outer wall at least between the first reinforcement layer and the second reinforcement layer and being connected with the first reinforcement layer and the second reinforcement layer in a diffusion-proof manner to form a diffusion barrier;wherein the multiplication product of the third specific heat conductivity (λ3, λ33) and the third thickness (d3; d33) is less than both (i) the multiplication product of the first specific heat conductivity (λ1) and the first thickness (d1) and (ii) the multiplication product of the second specific heat conductivity (λ2) and the second thickness (d2). 11. The spacer profile according to claim 10, wherein the hollow profile body and the diffusion barrier layer are integrally made of the diffusion-proof EVOH-plastic material. 12. The spacer profile according to claim 10, wherein the diffusion barrier layer further comprises at least a second layer made of polyolefin, the second layer being applied onto the first layer. 13. The spacer profile according to claim 12, wherein the diffusion barrier layer extends perpendicular to and in the longitudinal direction (Z) on at least a part of the first reinforcement layer that faces towards the second reinforcement layer and/or on at least part of the second reinforcement layer that faces towards the first reinforcement layer. 14. The spacer profile according to claim 10, wherein the third thickness (d33) of the diffusion barrier layer is greater than the first thickness (d1) and/or the second thickness (d2). 15. The spacer profile according to claim 10, wherein the diffusion barrier layer is not disposed between the hollow profile body and one or both of the first reinforcement layer and the second reinforcement layer. 16. The spacer profile according to claim 10, wherein the diffusion barrier layer extends perpendicular to and in the longitudinal direction (Z) in one piece on the outer wall only between the first and second reinforcement layers. 17. The spacer profile according to claim 10, wherein the diffusion barrier layer extends perpendicular to and in the longitudinal direction (Z) on at least a part of the first reinforcement layer that faces towards the second reinforcement layer and/or on at least part of the second reinforcement layer that faces towards the first reinforcement layer. 18. The spacer profile according to claim 10, wherein the spacer profile has been bent about an axis parallel to the transverse direction (X) such that an angle of 90° is formed by portions of the outer wall that have been bent relative to each other and the inner wall lies further inwardly than the outer wall with respect to the bending radius, and the diffusion barrier layer between the reinforcement layers is at least substantially uncompressed and unstretched. 19. An insulating pane unit comprising: at least first and second panes arranged opposite to each other and spaced apart to form an intervening space therebetween, anda spacer frame made of the spacer profile according to claim 10, the spacer frame being arranged between the first and second panes such that outer sides of the first and second side walls in the lateral direction (X) are bonded by a diffusion-proof adhesive material to inward-facing sides of the respective first and second panes and such that the spacer frame at least partially delimits the intervening space between the first and second panes. 20. An insulating pane unit comprising: at least first and second panes arranged opposite to each other and spaced apart to form an intervening space therebetween, anda spacer frame made of the spacer profile according to claim 1, the spacer frame being arranged between the first and second panes such that outer sides of the first and second side walls in the lateral direction (X) are bonded by a diffusion-proof adhesive material to inward-facing sides of the respective first and second panes and such that the spacer frame at least partially delimits the intervening space between the first and second panes.