Medical fluid container with concave side weld
A flexible non-PVC, non-DEHP polyolefin container or bag for medical fluids has an elongated container body formed of polyolefin film. The container has one or more ports equipped with a polyolefin fill tube and port closure assembly. The container includes a concave seam on at least one of its longitudinal sides.
1. A flexible fluid container comprising:
a flexible elongated container body having a fluid reservoir formed therein surrounded by a container wall including a front portion and a back portion and a pair of opposing longitudinal side edges;
the front portion and the back portion each being formed of a sheet of flexible polyolefin film that is PVC-free and DEHP-free;
the front portion and the back portion being sealed together along a pair of opposing outer peripheral seams adjacent respectively to the pair of longitudinal side edges to define the fluid reservoir;
wherein each of the outer peripheral seams follows a concave path with respect to a longitudinal axis of the container; and
wherein the concave path has a concavity ratio in a range of about 35 to 70.
2. A container according to claim 1 , wherein the longitudinal side edges are straight and the outer peripheral seams curve inwardly with respect to the longitudinal side edges.
3. A container according to claim 1 , wherein the front portion and the back portion are each formed of a separate sheet of film.
4. A container according to claim 1 , wherein the film of the front portion is identical to the film of the back portion.
5. A container according to claim 4 , wherein the front portion and the back portion are formed from a unitary sheet of the film that is folded to form the front portion and the back portion.
6. A container according to claim 4 , wherein the front portion is formed from a first sheet of a multiple layer film and the back portion is formed from a second sheet of the multiple layer film.
7. A container according to claim 6 , wherein the first sheet and the second sheet are each an individual multilateral sheet of the multiple layer film.
8. A container according to claim 7 , wherein the multilateral sheet is rectangular.
9. A container according to claim 1 , wherein the film is a multiple layer polyolefin film that provides a moisture vapor transmission rate of less than 0.060 g/100 in 2 -day.
10. A container according to claim 1 , wherein the concave path followed by the outer peripheral seam has a concavity ratio in a range of about 40 to 70.
11. A container according to claim 10 , wherein the concave path followed by the outer peripheral seam has a concavity ratio of about 53.
12. A flexible fluid container comprising:
a flexible elongated container body having a fluid reservoir formed therein surrounded by a container wall including a front portion and a back portion and a pair of opposing longitudinal side edges;
the front portion and the back portion being sealed together along an outer peripheral seam adjacent to one of the longitudinal side edges to define the fluid reservoir;
wherein the outer peripheral seam follows a concave path with respect to a longitudinal axis of the container and curves inwardly with respect to the one longitudinal side edge; and
wherein the concave path has a concavity ratio in a range of about 35 to 70.
13. A flexible fluid container according to claim 12 , wherein the one of the longitudinal side edges that is adjacent to the outer peripheral seam is straight.
14. A container according to claim 12 , wherein the concave path followed by the outer peripheral seam has a concavity ratio in a range of about 40 to 70.
15. A container according to claim 14 , wherein the concave path followed by the outer peripheral seam has a concavity ratio of about 53.
16. A flexible fluid container comprising:
a flexible elongated container body having a fluid reservoir formed therein surrounded by a container wall including a front portion and a back portion and a pair of opposing straight side edges extending longitudinally;
the front portion and the back portion being formed of a multiple layer polyolefin film that is PVC-free and DEHP-free, the front portion and the back portion being sealed together along an outer peripheral seam that extends adjacent to the opposing straight side edges to define the fluid reservoir;
wherein the outer peripheral seam adjacent to the opposing straight side edges follows a path that is concave with respect to a central longitudinal axis of the container body and curves inwardly with respect to each of the opposing straight side edges; and
wherein the concave path followed by the outer peripheral seam has a concavity ratio in a range of about 35-70.
17. A container according to claim 16 , further comprising a top edge and a bottom edge opposing the top edge, the top edge and the bottom edge extending transverse to the central axis of the container body, the container body having a hole formed therethrough adjacent the top edge for hanging the container and a pair of sealed ports at the bottom edge.
18. A container according to claim 17 , wherein the front portion and the back portion are formed of a unitary sheet of multiple layer polyolefin film that is free of PVC and DEHP and the sealed ports are free of PVC and DEHP.
19. A container according to claim 16 , wherein the container has a moisture vapor transmission rate of less than 0.060 g/100 in 2 -day.
20. A container according to claim 16 , wherein the concave path followed by the outer peripheral seam has a concavity ratio in a range of about 40 to 70.
21. A container according to claim 20 , wherein the concave path followed by the outer peripheral seam has a concavity ratio of about 53.
22. A flexible fluid container comprising:
a flexible elongated container body having a fluid reservoir formed therein surrounded by a container wall including a front portion and a back portion and a pair of opposing longitudinal side edges;
the front portion and the back portion being sealed together along a pair of opposing outer peripheral seams adjacent respectively to the pair of longitudinal side edges to define the fluid reservoir;
wherein each of the outer peripheral seams follows a concave path with respect to a longitudinal axis of the container; and
wherein the concave path has a concavity ratio in a range of about 35 to 70.
23. A container according to claim 22 , wherein the concave path followed by the outer peripheral seam has a concavity ratio in a range of about 40 to 70.
24. A container according to claim 23 , wherein the concave path followed by the outer peripheral seam has a concavity ratio of about 53.