AU2004303723A1 - Resilient compound for sealing device comprising detectable material such as barium sulfate - Google Patents
Resilient compound for sealing device comprising detectable material such as barium sulfate Download PDFInfo
- Publication number
- AU2004303723A1 AU2004303723A1 AU2004303723A AU2004303723A AU2004303723A1 AU 2004303723 A1 AU2004303723 A1 AU 2004303723A1 AU 2004303723 A AU2004303723 A AU 2004303723A AU 2004303723 A AU2004303723 A AU 2004303723A AU 2004303723 A1 AU2004303723 A1 AU 2004303723A1
- Authority
- AU
- Australia
- Prior art keywords
- compound
- sealing device
- resilient
- resilient compound
- detectable material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3296—Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/064—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing combining the sealing function with other functions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
Description
WO 2005/061649 PCT/NZ2004/000326 1 TITLE OF THE INVENTION Resilient compound for sealing device comprising detectable material such as barium sulfate 5 BACKGROUND TO THE INVENTION This invention relates to a resilient compound useful for sealing purposes and sealing devices constructed therefrom. 10 A problem, which exists in the food manufacturing/processing industry, arises from the presence of unwanted foreign inclusions in the foodstuff. When the foodstuff is of a type where it can be filtered it is generally the case 15 that the foreign inclusion can be filtered out. However, there are foodstuffs, which by their very nature cannot be filtered or readily be filtered. The foodstuff may also be of a type such that during the manufacturing or processing procedure it reaches a state where filtration is no longer a viable means of removing foreign inclusions. 20 Such foodstuffs are often found in the dairy industry and include cheese, ice cream and the like. Foreign inclusions can come from various potential sources. Many of the 25 sources of inclusions can be controlled so that the possibility of an inclusion originating from the potential source is very low or it can be detected/intercepted before it becomes entrained in the foodstuff.
WO 2005/061649 PCT/NZ2004/000326 2 One example of a source of inclusions in the dairy and other food processing plants has been identified as seals (more particularly ring type joint ("RTJ") seals). Seals, especially of the RTJ type, are widely used in pipe work fittings in 5 foodstuff manufacturing and processing plants. The inclusion generally arises from a small piece of the seal breaking away or being cut/forced from the seal. One of the primary reasons for sealed break down is the clean in place ("CIP") wash process, which regularly takes place in such plants. The CIP wash 10 involves a flush, which includes caustic solution followed by a water flush, which are pumped through the plant between process batches in order to clean out the whole plant. The caustic flush is aggressive and over time with repeated CIP wash cycles will start to attack the seals, which results in particles coming off. 15 Another example is when the seal is part of a valve such as a gate valve, butterfly valve, flap valve or the like the operation of the valve can cause a small part of the seal to be separated from the main body of the seal. 20 Also food manufacturing/processing plants are routinely disassembled and reassembled either entirely or in part for maintenance, cleaning or repair purposes. As a consequence seals in unions, valves, joints and the like can become damaged. Thus, small particles of seal material can become separated from the main seal material. These small particles can, for example, 25 find their way into a flow passage, valve or union and ultimately become entrained in product as the product passes therethrough.
WO 2005/061649 PCT/NZ2004/000326 3 Cheese is a foodstuff where filtration cannot be used or, as the product forms, becomes a non-viable means of removal of foreign inclusions. Thus it becomes extremely difficult to detect whether a foreign inclusion is present in the product. Other products, which suffer from this problem, can be highly 5 viscous or solid (semi-solid) foodstuffs, which by their very nature prevent the use of conventional filtration methods. SUMMARY OF THE INVENTION 10 It is thus an object of the present invention to provide a resilient compound useful for sealing purposes and sealing devices made therefrom whereby it is possible to detect if a part of the sealing compound has become entrained in a processed product more particularly a foodstuff. 15 Broadly in one aspect of the present invention there is provided a resilient compound for use in forming a seal characterised in that the sealing compound includes a detectable material dispersed therethrough. According to a second broad aspect of the invention there is provided a sealing 20 device made in whole or in part from a resilient compound, which includes a detectable material, dispersed therethrough. In the preferred form of the invention the detectable material is of a type, which can be detected by x-rays, metal detection or other detection means. 25 WO 2005/061649 PCT/NZ2004/000326 4 The seal material can be a natural or synthetic rubber or thermoplastic material. During the compounding process the detectable material is uniformly dispersed through the compound. 5 In a preferred form of the invention the detectable material is barium sulphate. In a preferred form of the invention the barium sulphate is added at the compounding stage. DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION 10 The present invention is based on the discovery that a small particle of sealing material when made from the compound as defined in the first broad aspect of the invention, which become entrained in a foodstuff during manufacture/processing, can subsequently be detected through the use of x 15 ray equipment. This is highly desirable for products of a type where filtration is not possible or becomes non-viable as a consequence of the structure of the product or changes of the product during the manufacturing process. Thus product prior to the completion of manufacture or at the completion of 20 manufacture can be x-rayed and any seal material entrained in the product can be detected. An obvious benefit is that a manufacturer can withdraw from a quantity of product which has been manufactured only that part which may contain a 25 foreign inclusion in the form of seal material.
WO 2005/061649 PCT/NZ2004/000326 5 Thus, for example, in the dairy industry, and in particular in cheese making, the manufacturer can x-ray each block of cheese and then remove any block in which a foreign inclusion is detected. The manufacturer can therefore avoid the risk that an entire shipment is rejected even though it may only be 5 one component part of the shipment in which a foreign inclusion is found to be present. To be viable the detectable material must be uniformly dispersed throughout the sealing compound. Thus even very small particle sizes can be detected by 10 x-ray equipment. The detectable material is therefore added at the compounding stage of the resilient sealing compound. The sealing compound can be principally a natural or synthetic rubber or thermoplastic material. During the compounding stage 15 the detectable material, which will generally be in powder form, is added at the desired percentage by volume. According to the preferred form of the invention the detectable material is barium sulphate. In the preferred form of the invention the ideal quantity has 20 been found to be about 5% by volume. According to a preferred form of the invention the basic thermoplastic polyester elastomer polymer material chemically consists of a modified polybutyleneterephthalate of the type which is manufactured and sold by 25 EI.DuPont de Nemours & Co. under the registered trade mark HYTREL. This is a composition which complies with the Food & Drug Administration for use in food contact situations i.e. it can be used in articles or components of articles WO 2005/061649 PCT/NZ2004/000326 6 for producing, manufacturing, packaging, process, preparing, treating, packaging, transporting or holding food and being intended for repeated food contact. More particularly the particular grade of HYTREL found to be of use for the invention is HYTREL 4068FG. 5 Barium sulphate is equally of material, which can be used in seals having food contact. Thus a sealing device manufactured form the sealing compound according to the invention can be used in food manufacturing and processing plants. 10 The sealing compound is able to be moulded, extruded or otherwise shaped or formed in order to create a sealing device. The sealing device can take many different forms including static and dynamic "0" rings, sheet gaskets, RJT sanitary 0 rings, butterfly valve seats, lip seals, other mouldings in sanitary 15 seal applications, sanitary valve seals and the like. Sealing material and sealing devices manufactured therefrom in accordance with the present invention can withstand normal clean in place operations. Thus the barium sulphate will not leach out of the sealing material under a 20 caustic wash solution. Furthermore, the barium sulphate will not break down during the normal shelf life of a seal. Nor will it deteriorate either before or during service. Thus in a food manufacturing or processing plant which contains sealing 25 devices made according to the present invention, any small particle of the sealing device which may break free or be ripped, cut etc. from the sealing material and become entrained in the foodstuff being processed will be WO 2005/061649 PCT/NZ2004/000326 7 detectable by x-ray equipment. Consequently either before or after packaging the foodstuff product can be subjected to x-ray investigation and even very small particles of sealing material will, by virtue of the presence of the barium sulphate therein be detectable. It is then a simple matter of 5 removing any foodstuff product in which a fragment of sealing material has been detected. The invention is open to modification as will be appreciated by those skilled in the art. For example the detectable material may be a metallic material, which 10 is able to be used in contact with foodstuffs and be evenly dispersed through the sealing material, but does not leach out under say a caustic wash in a clean and place process or break down or deteriorate either before or during service. The detectable material may be a material, which is detectable by means other 15 than x-ray. The sealing material according to the present invention while primarily of particular use in the food manufacturing/processing industry can be used in other industries where there is a need to be able to detect a foreign inclusion 20 in a fully or partly manufactured product. Also while it is preferred that the sealing compound be a mouldable compound other compounds are envisaged within the scope of the present invention. 25
Claims (19)
1. A resilient compound for use in forming a seal characterised in that the sealing compound includes a detectable material dispersed 5 therethrough.
2. A resilient compound as claimed in claim I wherein the detectable material is of a type, which can be detected by x-rays, metal detection or other detection means. 10
3. A resilient compound as claimed in claim 1 or 2 wherein the detectable material is uniformly dispersed through the compound.
4. A resilient compound as claimed in any one of claims 1 to 3 wherein the 15 detectable material is barium sulphate.
5. A resilient compound as claimed in claim 4 wherein the barium sulphate is'added at the compounding stage of the resilient compound. 20
6. A resilient compound as claimed in claim 4 or 5 wherein the barium sulphate constitutes about 5% by volume.
7. A resilient compound as claimed in any one of claims 1 to 6 wherein the sealing compound is principally a natural or synthetic rubber or a 25 thermoplastic material. WO 2005/061649 PCT/NZ2004/000326 9
8. A resilient compound as claimed in claim 7 wherein the thermoplastic material is a modified polybutyleneterephthate.
9. A sealing device made in whole or in part from a resilient compound, 5 which includes a detectable material, dispersed therethrough.
10. A sealing device as claimed in claim 9 wherein the detectable material is of a type, which can be detected by x-rays, metal detection or other detection means. 10
11. A sealing device as claimed in claim 9 or 10 wherein the detectable material is uniformly dispersed through the compound.
12. A sealing device as claimed in any one of claims 9 to 12 wherein the 15 detectable material is a barium sulphate.
13. A sealing device as claimed in claim 12 wherein the barium sulphate is added at the compounding stage. 20
14. A sealing device as claimed in claim 12 or 13 wherein the barium sulphate constitutes 5% by volume of the resilient compound.
15. A sealing device as claimed in any one of claims 9 to 14 wherein the resilient compound is principally a natural or synthetic rubber or a 25 thermoplastic material. WO 2005/061649 PCT/NZ2004/000326 10
16. A sealing device as claimed in claim 15 wherein the thermoplastic material is a modified polybutyleneterephthate.
17. A sealing device as claimed in any one of claims 9 to 16 when in the 5 form of a dynamic or static "0" ring, sheet gasket, sanitary 0 ring, butterfly valve seat, lip seal or sanitary valve seat.
18. A resilient compound as claimed in claim 1 substantially as herein described. 10
19. A sealing device as claimed in claim 9 substantially as herein described.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ530374 | 2003-12-24 | ||
NZ53037403 | 2003-12-24 | ||
PCT/NZ2004/000326 WO2005061649A1 (en) | 2003-12-24 | 2004-12-21 | Resilient compound for sealing device comprising detectable material such as barium sulfate |
Publications (1)
Publication Number | Publication Date |
---|---|
AU2004303723A1 true AU2004303723A1 (en) | 2005-07-07 |
Family
ID=34709414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2004303723A Abandoned AU2004303723A1 (en) | 2003-12-24 | 2004-12-21 | Resilient compound for sealing device comprising detectable material such as barium sulfate |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1713875A1 (en) |
AU (1) | AU2004303723A1 (en) |
NO (1) | NO20063414L (en) |
WO (1) | WO2005061649A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004050918A1 (en) * | 2004-10-19 | 2006-04-20 | Hipp & Co | Inhibiting contamination of flowable foodstuffs by parts of seals or packaging, by providing seals or packaging with contact-free detectable label, detecting label in foodstuff and removing any detected contaminants |
US8980982B2 (en) | 2011-03-25 | 2015-03-17 | Illinois Tool Works, Inc. | Electromagnetic spectrally detectable plastic packaging components |
GB201315919D0 (en) * | 2013-09-06 | 2013-10-23 | Martec Of Whitwell Ltd | Improvements relating to pipeline cleaning device |
US10619268B2 (en) | 2013-11-13 | 2020-04-14 | Illinois Tool Works, Inc. | Metal detectable fiber and articles formed from the same |
US11542634B2 (en) | 2014-07-25 | 2023-01-03 | Illinois Tool Works Inc. | Particle-filled fiber and articles formed from the same |
US10753022B2 (en) | 2014-07-25 | 2020-08-25 | Illinois Tool Works, Inc. | Particle-filled fiber and articles formed from the same |
WO2019081114A1 (en) * | 2017-10-27 | 2019-05-02 | Contitech Schlauch Gmbh | Flexible tube or seal having a detectable layer |
US10947664B2 (en) | 2018-02-19 | 2021-03-16 | Illinois Tool Works Inc. | Metal detectable scouring pad |
CN112226086A (en) * | 2020-09-30 | 2021-01-15 | 广东安格尔橡塑科技有限公司 | Material capable of detecting silica gel ball and preparation method thereof |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2069842B (en) * | 1980-02-27 | 1984-02-08 | Aeroform Ltd | Surgical sponges |
EP0423508A1 (en) * | 1989-10-20 | 1991-04-24 | General Electric Company | Molding compositions |
GB9003416D0 (en) * | 1990-02-15 | 1990-04-11 | Tba Industrial Products Ltd | Sheet sealing materials |
GB9401577D0 (en) * | 1994-01-27 | 1994-03-23 | Sheffield Orthodontic Lab Limi | Polymer material suitable for the production of medical artifacts |
US5696189A (en) * | 1995-12-01 | 1997-12-09 | E. I. Du Pont De Nemours And Company | Perfluoroelastomer compositions |
DE19756141A1 (en) * | 1997-12-17 | 1999-06-24 | Bayer Ag | Radiopaque thermoplastic molding compound |
JP3553415B2 (en) * | 1999-04-28 | 2004-08-11 | 三菱電線工業株式会社 | Semiconductor manufacturing equipment seal |
DE10007671A1 (en) * | 2000-02-19 | 2001-08-23 | Mitsubishi Polyester Film Gmbh | Opaque white film, useful for interior cladding, displays, signs and labels, comprises a crystallizable thermoplastic, barium sulfate and an optical brightening agent |
DE10148493B4 (en) * | 2001-10-01 | 2004-12-09 | Itw Automotive Products Gmbh & Co. Kg | Sealing plug for sealing an opening in a sheet metal of a body or the floor panel of automobiles |
-
2004
- 2004-12-21 EP EP04808921A patent/EP1713875A1/en not_active Withdrawn
- 2004-12-21 WO PCT/NZ2004/000326 patent/WO2005061649A1/en active Application Filing
- 2004-12-21 AU AU2004303723A patent/AU2004303723A1/en not_active Abandoned
-
2006
- 2006-07-24 NO NO20063414A patent/NO20063414L/en unknown
Also Published As
Publication number | Publication date |
---|---|
NO20063414L (en) | 2006-09-22 |
WO2005061649A1 (en) | 2005-07-07 |
EP1713875A1 (en) | 2006-10-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK1 | Application lapsed section 142(2)(a) - no request for examination in relevant period |