Multi-layered plastic body for medical applications
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29D-022/00
B29D-023/00
B32B-001/08
출원번호
UP-0122814
(2008-05-19)
등록번호
US-7799400
(2010-10-11)
우선권정보
DE-101 44 892(2001-09-12)
발명자
/ 주소
Zihlmann, Rudolf
출원인 / 주소
Roche Diagnostics International AG
대리인 / 주소
Dorsey & Whitney LLP
인용정보
피인용 횟수 :
3인용 특허 :
10
초록▼
A multi-layered plastic body for containing, storing or conducting a medical, diagnostic, pharmaceutical, cosmetic or other product, the plastic body including a first layer made of a stress fracture resistant plastic material, and at least a second layer adjacent to the first layer and made of a pl
A multi-layered plastic body for containing, storing or conducting a medical, diagnostic, pharmaceutical, cosmetic or other product, the plastic body including a first layer made of a stress fracture resistant plastic material, and at least a second layer adjacent to the first layer and made of a plastic material exhibiting a lower resistance to stress fractures than the first plastic material. The invention encompasses a suitable method of making the body.
대표청구항▼
The invention claimed is: 1. A multi-layered plastic body contains a medical, diagnostic, pharmaceutical or/and cosmetic product, said plastic body comprising: a first layer made of a stress fracture resistant plastic material; at least a second layer made of a plastic material which exhibits a low
The invention claimed is: 1. A multi-layered plastic body contains a medical, diagnostic, pharmaceutical or/and cosmetic product, said plastic body comprising: a first layer made of a stress fracture resistant plastic material; at least a second layer made of a plastic material which exhibits a lower resistance to stress fractures than said first plastic material; and a septum; wherein the first layer and the second layer are joined by a connection, the connection established by a multiple-component injection molding process in which the first layer and second layer are injected into an injection mold of a die through at least one injection nozzle of the injection mold; and wherein the septum is coupled by a material join to the first and second layers, the material join established by placing the septum in the injection mold before delivering the first and second plastic materials, wherein during delivery of the first and second plastic materials, the septum is injection-coated with the first and second plastic materials to form the material join. 2. The plastic body as set forth in claim 1, wherein at least the first layer encloses a hollow space formed by the plastic body. 3. The plastic body as set forth in claim 1, wherein the first layer forms an outer layer of the plastic body, thereby forming a skin. 4. The plastic body as set forth in claim 1, wherein the plastic material of the second layer exhibits at least one of or a combination of a greater transparency to light from the visible spectrum, a greater mechanical stability, a greater dimensional stability and a lower permeability than the stress fracture resistant plastic material of the first layer. 5. The plastic body as set forth in claim 1, wherein the second layer is arranged between the first layer and another layer made of one of the same or another stress fracture resistant plastic material. 6. The plastic body as set forth in claim 1, wherein the first layer is connected to the second layer in a material lock. 7. The plastic body as set forth in claim 1, wherein the first layer is connected to the second layer in a positive lock. 8. The plastic body as set forth in claim 1, wherein the multiple-component injection molding process establishing the connection comprises a co-injection multiple-component injection molding process. 9. The plastic body as set forth in claim 1, wherein the multiple-component injection molding process establishing the connection comprises a composite injection molding process. 10. The plastic body as set forth in claim 1, wherein the multiple-component injection molding process establishing the connection comprises sequentially combining multiple-component injection molding and composite injection molding. 11. The plastic body as set forth in claim 1, wherein the plastic body is at least part of a container, the container being one of a group comprising ampoules, catheters or components of a fluid-handling system. 12. The plastic body as set forth in claim 11, wherein the plastic body is generally cylindrical, defines a hollow space, and comprises at least one opening at each of two opposing ends, said openings being provided in general axial alignment. 13. The plastic body as set forth in claim 1, wherein the stress fracture resistant plastic material is semi-crystalline. 14. The plastic body as set forth in claim 13, wherein the stress fracture resistant plastic material has a crystalline proportion of at least 30% by weight. 15. An injection molding method for manufacturing a multi-layered plastic body contains a medical, diagnostic, pharmaceutical, cosmetic or other product, comprising: delivering, in a first injection phase, a stress fracture resistant first plastic material through an injection nozzle until an injection mold is partially filled; delivering, in a second injection phase, a second plastic material, which exhibits a lower resistance to stress fractures than said first plastic material, into the injection mold to form a core layer enclosed by the first plastic material; wherein the first and second plastic materials are introduced into an injection mold and molded into said plastic body by way of one of co-injection molding, composite injection molding or a combination of these two molding methods, such that the first plastic material forms a first, outer layer of the plastic body and the second plastic material forms a second, core layer of the plastic body providing a septum coupled by a material join to the first and second layers; and wherein the injection molded plastic body is at least part of a container, the container being one of a group comprising ampoules, catheters or components of a fluid-handling system. 16. The method as set forth in claim 15, wherein the plastic material of the first layer and the plastic material of the second layer are injected into an injection mold of a die through at least one injection nozzle of the injection mold in one of immediate succession or at least intermittently in conjunction. 17. The method as set forth in claim 15, further comprising delivering, before the first injection phase, a plastic material in an area of the injection mold corresponding to a septum area for forming a septum, wherein the septum is formed by composite injection molding and the remainder of the plastic body is formed by co-injection multiple-component injection molding. 18. The method as set forth in claim 15, wherein during the second injection phase, the first and the second plastic material are injected in the injection mold co-axially through the same injection nozzle. 19. The method as set forth in claim 18, wherein at the end of the second injection phase, the delivering the second plastic material is terminated, and the first plastic material is injected into the injection mold to form an outer layer of the first plastic material in a region proximate the injection nozzle.
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