EP0114120A2 - Fabric material - Google Patents
Fabric material Download PDFInfo
- Publication number
- EP0114120A2 EP0114120A2 EP84300259A EP84300259A EP0114120A2 EP 0114120 A2 EP0114120 A2 EP 0114120A2 EP 84300259 A EP84300259 A EP 84300259A EP 84300259 A EP84300259 A EP 84300259A EP 0114120 A2 EP0114120 A2 EP 0114120A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tapes
- weft
- tape
- warp
- woven fabric
- 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.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
- D03D15/46—Flat yarns, e.g. tapes or films
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/587—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads adhesive; fusible
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
Definitions
- the present invention relates to fabric material and particularly to woven fabric material including tapes of synthetic resinous material, for example polyamide, polyester, polypropylene, polyethylene.
- Tapes of synthetic resinous material and woven fabric materials made from such tapes are stretchable. Methods of forming stretched fabric material including polypropylene tapes are described and claimed in our co-pending European Application No. 82.3036322.
- the present invention is an alternative and improved method of forming a stretched woven fabric material.
- a method of manufacturing a fabric material comprising the steps of forming a woven base fabric of warp and weft tapes of synthetic resinous material, either the warp or the weft tapes including a series of zones in which the tape is subdivided into a plurality of tapes of lesser width, raising the temperature of the woven fabric, applying tension to the woven fabric to stretch the other of the warp and weft tapes and simultaneously separate the tapes of lesser width in said zones to open gaps of limited length between the said tapes of lesser width, and thereafter cooling the stretched woven fabric in the stretched condition.
- the cooled stretched product obtained by the method of the present invention contains gaps of limited length between the said tapes of lesser width.
- This stretched woven fabric thus has a substantially greater area than the woven base fabric.
- weft tapes of the woven base fabric which preferably include the series of zones in which the tape is subdivided into a plurality of tapes of lesser width. These zones are separated from one another by portions of untreated weft tape the presence of which enables the weft tape to retain sufficient transverse rigidity to lie reasonably flat in the woven base fabric.
- a method of manufacturing a fabric material comprising the steps of forming a woven base fabric of warp and weft tapes of synthetic resinous material, the warp tapes being molecularly stretchable in the longitudinal direction and the weft tapes including a series of zones in which the weft tape is subdivided into a plurality of tapes of lesser width, the zones in said series each being separated from one another by an unsplit portion of weft tape, applying heat to raise the temperature of the woven fabric, applying tension to the woven fabric to stretch the warp tapes in the longitudinal direction and simultaneously separate the subdivided weft tapes in said zones to open gaps between the subdivided weft tapes of lesser width, which gaps are limited in length by the unsplit portions of weft tape, and thereafter cooling the stretched woven fabric to obtain a woven fabric of greater area than the originally formed woven base fabric.
- the weft tape is advantageously formed with zones in each of which there is a plurality of parallel slits extending longitudinally in the tape with each set of slits in one zone separated from the adjacent similar zone by a portion of flat untreated tape extending substantially perpendicular to the length of the weft tape.
- the slits which subdivide each zone in the weft tape are most conveniently formed by pretreating the weft tapes by passing them over the surface of a roller having thereon several rows of pins which penetrate the tape.
- the roller and the tape are advanced at speeds in a ratio of the order of 1.2 to 1.0 so that the pins form slits of desired length in the tape.
- Each row of pins thus produces a corresponding row of slits, and the length of the slits is selected such that the row of slits formed by each row of pins is spaced from the succeeding row of slits by an unsplit area or portion of the weft tape. In this portion the weft tape still has its full width.
- the slits in the weft tapes can be formed using a roller with interrupted circumferential knife edges, the tape being passed over the roller surface at a speed approximately equal to the roller surface speed.
- the synthetic resinous material from which the tapes are formed is a polyolefin such as polyethylene or polypropylene.
- a tape 1 preferably of polypropylene which has therein a series of zones 2 in which the tape has a number of parallel slits 3 causing the tape 1 to be divided, in each of the zones, into several tapes 4 of lesser width.
- Each of the zones 2 is separated from the adjacent zone in the series by an unsplit portion 5 which is a portion of tape of the full width of the tape before any slits were formed in it.
- the unsplit portions 5 of the tape extend transversely of the tape 1 and give the tape transverse rigidity to enable it to remain flat during weaving of the fabric without bunching together of the tapes 4 of lesser width.
- the woven base fabric which is illustrated in Figure 2, is formed using polypropylene tapes 1, i.e. tapes having the zones 2 containing the tapes 4 of lesser width separated by the slits 3, as the weft elements, and untreated polypropylene tapes 6 as the warp elements.
- the woven base fabric of Figure 2 is passed through a heating zone, for example in contact with a heated surface, so as to raise the temperature of the fabric to a temperature at which the polypropylene tapes are readily extensible under tension.
- the temperature is a temperature of the order of 160°C at which the polypropylene becomes softened.
- the woven fabric is tensioned longitudinally of the fabric so that the warp tapes 6 are molecularly stretched to approximately twice their original length. As the warp tapes 6 extend, so the frictional contact between the softened warp and weft tapes causes the subdivided tapes 4 of lesser width in the zones 2 in each weft tape 1 to be separated from one another. Each weft tape 1 thus becomes a series of four smaller tapes 4 united at intervals by the unsplit portions 5, as illustrated in Figure 3.
- the unsplit portions 5 may in some circumstances be caused to spread during the stretching of the warp tapes 6. Also the separation from one another of the tapes 4 of lesser width during the stretching of the warp tapes 6 may cause some of the slits 3 to be propagated lengthwise into some of the unsplit portions 5 of the weft tapes 1.
- the stretched woven fabric shown in Figure 3 is cooled under tension in its stretched condition to obtain a final product corresponding closely in dimensions to the heated stretched woven fabric.
- the final stretched woven fabric therefore has gaps between the tapes 4 of lesser width.
- the degree of bonding is controllable by appropriate adjustment of the levels of temperature and tension applied to the fabric, and by the length of time for which the fabric is exposed to the raised temperature.
- the stretched fabric material obtained by the method described has approximately twice the area of the original woven base fabric and is composed of warp tapes of approximately half the count of the warp tapes used in forming the original woven base fabric.
- a warp tape 6 of 44 tex used in the original woven base fabric is reduced to approximately 22 tex, and a fabric having warp tapes of such lower count is produced more cheaply by the method of the present invention than it can be produced by weaving an original fabric from warp of that lower count.
- the tenacity of the.stretched fabric as measured in grammes/dtex is increased as compared with the original woven base fabric.
- the stretched woven fabric obtained by the method of this invention has weft tapes with an increased effective width, as compared with the original woven base fabric.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Laminated Bodies (AREA)
- Woven Fabrics (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Jellies, Jams, And Syrups (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
- The present invention relates to fabric material and particularly to woven fabric material including tapes of synthetic resinous material, for example polyamide, polyester, polypropylene, polyethylene.
- Tapes of synthetic resinous material and woven fabric materials made from such tapes are stretchable. Methods of forming stretched fabric material including polypropylene tapes are described and claimed in our co-pending European Application No. 82.3036322.
- The present invention is an alternative and improved method of forming a stretched woven fabric material.
- According to the present invention there is provided a method of manufacturing a fabric material comprising the steps of forming a woven base fabric of warp and weft tapes of synthetic resinous material, either the warp or the weft tapes including a series of zones in which the tape is subdivided into a plurality of tapes of lesser width, raising the temperature of the woven fabric, applying tension to the woven fabric to stretch the other of the warp and weft tapes and simultaneously separate the tapes of lesser width in said zones to open gaps of limited length between the said tapes of lesser width, and thereafter cooling the stretched woven fabric in the stretched condition.
- The cooled stretched product obtained by the method of the present invention contains gaps of limited length between the said tapes of lesser width. This stretched woven fabric thus has a substantially greater area than the woven base fabric.
- It is more convenient to stretch warp tapes of synthetic resinous material in a woven base fabric and it is'therefore the weft tapes of the woven base fabric which preferably include the series of zones in which the tape is subdivided into a plurality of tapes of lesser width. These zones are separated from one another by portions of untreated weft tape the presence of which enables the weft tape to retain sufficient transverse rigidity to lie reasonably flat in the woven base fabric.
- According to the preferred method of the present invention there is therefore provided a method of manufacturing a fabric material comprising the steps of forming a woven base fabric of warp and weft tapes of synthetic resinous material, the warp tapes being molecularly stretchable in the longitudinal direction and the weft tapes including a series of zones in which the weft tape is subdivided into a plurality of tapes of lesser width, the zones in said series each being separated from one another by an unsplit portion of weft tape, applying heat to raise the temperature of the woven fabric, applying tension to the woven fabric to stretch the warp tapes in the longitudinal direction and simultaneously separate the subdivided weft tapes in said zones to open gaps between the subdivided weft tapes of lesser width, which gaps are limited in length by the unsplit portions of weft tape, and thereafter cooling the stretched woven fabric to obtain a woven fabric of greater area than the originally formed woven base fabric.
- The weft tape is advantageously formed with zones in each of which there is a plurality of parallel slits extending longitudinally in the tape with each set of slits in one zone separated from the adjacent similar zone by a portion of flat untreated tape extending substantially perpendicular to the length of the weft tape.
- The slits which subdivide each zone in the weft tape are most conveniently formed by pretreating the weft tapes by passing them over the surface of a roller having thereon several rows of pins which penetrate the tape. The roller and the tape are advanced at speeds in a ratio of the order of 1.2 to 1.0 so that the pins form slits of desired length in the tape. Each row of pins thus produces a corresponding row of slits, and the length of the slits is selected such that the row of slits formed by each row of pins is spaced from the succeeding row of slits by an unsplit area or portion of the weft tape. In this portion the weft tape still has its full width.
- There is thus obtained an intermittent slitting of the tapes which are subsequently used to form the weft elements in the woven base fabric.
- As an alternative to the use of a pinned roller, the slits in the weft tapes can be formed using a roller with interrupted circumferential knife edges, the tape being passed over the roller surface at a speed approximately equal to the roller surface speed.
- Conveniently the synthetic resinous material from which the tapes are formed is a polyolefin such as polyethylene or polypropylene.
- The present invention will be further understood from the following description of a preferred embodiment thereof which is made by way of example with reference to the accompanying drawings in which:-
- Figure 1 shows a plan view of a pretreated tape to be used in forming a woven base fabric,
- Figure 2 shows a portion of a woven base fabric including tapes similar to the tape of Figure 1 as weft tapes, and
- Figure 3 shows the portion of woven base fabric of Figure 2 after being subjected to a stretching treatment.
- Referring to Figure 1 there is shown a tape 1 preferably of polypropylene which has therein a series of
zones 2 in which the tape has a number ofparallel slits 3 causing the tape 1 to be divided, in each of the zones, intoseveral tapes 4 of lesser width. - Each of the
zones 2 is separated from the adjacent zone in the series by anunsplit portion 5 which is a portion of tape of the full width of the tape before any slits were formed in it. Theunsplit portions 5 of the tape extend transversely of the tape 1 and give the tape transverse rigidity to enable it to remain flat during weaving of the fabric without bunching together of thetapes 4 of lesser width. - The woven base fabric, which is illustrated in Figure 2, is formed using polypropylene tapes 1, i.e. tapes having the
zones 2 containing thetapes 4 of lesser width separated by theslits 3, as the weft elements, and untreated polypropylene tapes 6 as the warp elements. - The woven base fabric of Figure 2 is passed through a heating zone, for example in contact with a heated surface, so as to raise the temperature of the fabric to a temperature at which the polypropylene tapes are readily extensible under tension. Advantageously the temperature is a temperature of the order of 160°C at which the polypropylene becomes softened. The woven fabric is tensioned longitudinally of the fabric so that the warp tapes 6 are molecularly stretched to approximately twice their original length. As the warp tapes 6 extend, so the frictional contact between the softened warp and weft tapes causes the subdivided
tapes 4 of lesser width in thezones 2 in each weft tape 1 to be separated from one another. Each weft tape 1 thus becomes a series of foursmaller tapes 4 united at intervals by theunsplit portions 5, as illustrated in Figure 3. - The
unsplit portions 5 may in some circumstances be caused to spread during the stretching of the warp tapes 6. Also the separation from one another of thetapes 4 of lesser width during the stretching of the warp tapes 6 may cause some of theslits 3 to be propagated lengthwise into some of theunsplit portions 5 of the weft tapes 1. - The separation of the four
smaller tapes 4 illustrated in Figure 3 is prevented only where an occasional twist occurs in the weft tape 1 as indicated at 8 in that Figure. - The stretched woven fabric shown in Figure 3 is cooled under tension in its stretched condition to obtain a final product corresponding closely in dimensions to the heated stretched woven fabric. The final stretched woven fabric therefore has gaps between the
tapes 4 of lesser width. - When stretching of the woven base fabric is effected at temperatures at which the polypropylene becomes softened, bonding occurs between the stretched warp tapes and the various components of the weft tapes at their intersections so that the stretched fabric material is locked and has excellent dimensional stability.
- The degree of bonding is controllable by appropriate adjustment of the levels of temperature and tension applied to the fabric, and by the length of time for which the fabric is exposed to the raised temperature.
- The stretched fabric material obtained by the method described has approximately twice the area of the original woven base fabric and is composed of warp tapes of approximately half the count of the warp tapes used in forming the original woven base fabric. For example a warp tape 6 of 44 tex used in the original woven base fabric is reduced to approximately 22 tex, and a fabric having warp tapes of such lower count is produced more cheaply by the method of the present invention than it can be produced by weaving an original fabric from warp of that lower count.
- The tenacity of the.stretched fabric as measured in grammes/dtex is increased as compared with the original woven base fabric.
- The stretched woven fabric obtained by the method of this invention has weft tapes with an increased effective width, as compared with the original woven base fabric.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84300259T ATE22579T1 (en) | 1983-01-18 | 1984-01-17 | TISSUE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8301318 | 1983-01-18 | ||
GB08301318A GB2133815B (en) | 1983-01-18 | 1983-01-18 | Fabric material |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0114120A2 true EP0114120A2 (en) | 1984-07-25 |
EP0114120A3 EP0114120A3 (en) | 1984-12-05 |
EP0114120B1 EP0114120B1 (en) | 1986-10-01 |
Family
ID=10536500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84300259A Expired EP0114120B1 (en) | 1983-01-18 | 1984-01-17 | Fabric material |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0114120B1 (en) |
AT (1) | ATE22579T1 (en) |
AU (1) | AU556886B2 (en) |
DE (1) | DE3460835D1 (en) |
DK (1) | DK604583A (en) |
FI (1) | FI840089A (en) |
GB (1) | GB2133815B (en) |
NZ (1) | NZ206854A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2010271531B2 (en) * | 2009-07-15 | 2015-11-26 | Nine Ip Limited | Woven ground cover materials |
GB2590378A (en) * | 2019-12-12 | 2021-06-30 | Stretchline Intellectual Properties Ltd | Stretchable textile article |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT220563B (en) * | 1959-05-23 | 1962-04-10 | Ernst Krombert | Method of making a fabric |
GB1022971A (en) * | 1962-08-30 | 1966-03-16 | Ici Ltd | Fabrics |
DE1535170A1 (en) * | 1964-03-10 | 1970-11-05 | Alexander Mirsky | Process for the production of warp threads for weaving or warp knitting by longitudinal division of a foil or a film |
CH511102A (en) * | 1968-07-23 | 1971-08-15 | Viktor Dipl Ing Kovacec | Cutting device for plastic films, in particular on weaving machines |
DE1710359A1 (en) * | 1967-05-03 | 1971-10-14 | Saint Freres S A | Woven objects, based on drawn straps made of plastic |
DE2503612A1 (en) * | 1974-01-31 | 1975-08-07 | Standard Oil Co | FINE RIBBON YARN FABRIC |
EP0070176A2 (en) * | 1981-07-14 | 1983-01-19 | Scott & Fyfe Limited | Stretched fabric material |
-
1983
- 1983-01-18 GB GB08301318A patent/GB2133815B/en not_active Expired
- 1983-12-29 DK DK604583A patent/DK604583A/en not_active Application Discontinuation
-
1984
- 1984-01-09 AU AU23151/84A patent/AU556886B2/en not_active Ceased
- 1984-01-11 FI FI840089A patent/FI840089A/en not_active Application Discontinuation
- 1984-01-17 NZ NZ206854A patent/NZ206854A/en unknown
- 1984-01-17 AT AT84300259T patent/ATE22579T1/en not_active IP Right Cessation
- 1984-01-17 DE DE8484300259T patent/DE3460835D1/en not_active Expired
- 1984-01-17 EP EP84300259A patent/EP0114120B1/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT220563B (en) * | 1959-05-23 | 1962-04-10 | Ernst Krombert | Method of making a fabric |
GB1022971A (en) * | 1962-08-30 | 1966-03-16 | Ici Ltd | Fabrics |
DE1535170A1 (en) * | 1964-03-10 | 1970-11-05 | Alexander Mirsky | Process for the production of warp threads for weaving or warp knitting by longitudinal division of a foil or a film |
DE1710359A1 (en) * | 1967-05-03 | 1971-10-14 | Saint Freres S A | Woven objects, based on drawn straps made of plastic |
CH511102A (en) * | 1968-07-23 | 1971-08-15 | Viktor Dipl Ing Kovacec | Cutting device for plastic films, in particular on weaving machines |
DE2503612A1 (en) * | 1974-01-31 | 1975-08-07 | Standard Oil Co | FINE RIBBON YARN FABRIC |
EP0070176A2 (en) * | 1981-07-14 | 1983-01-19 | Scott & Fyfe Limited | Stretched fabric material |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2010271531B2 (en) * | 2009-07-15 | 2015-11-26 | Nine Ip Limited | Woven ground cover materials |
GB2590378A (en) * | 2019-12-12 | 2021-06-30 | Stretchline Intellectual Properties Ltd | Stretchable textile article |
GB2590378B (en) * | 2019-12-12 | 2023-10-18 | Stretchline Intellectual Properties Ltd | Stretchable textile article |
Also Published As
Publication number | Publication date |
---|---|
GB2133815A (en) | 1984-08-01 |
DK604583D0 (en) | 1983-12-29 |
EP0114120B1 (en) | 1986-10-01 |
FI840089A (en) | 1984-07-19 |
EP0114120A3 (en) | 1984-12-05 |
FI840089A0 (en) | 1984-01-11 |
ATE22579T1 (en) | 1986-10-15 |
DE3460835D1 (en) | 1986-11-06 |
NZ206854A (en) | 1986-07-11 |
GB8301318D0 (en) | 1983-02-16 |
AU2315184A (en) | 1984-07-19 |
GB2133815B (en) | 1986-03-26 |
DK604583A (en) | 1984-07-19 |
AU556886B2 (en) | 1986-11-20 |
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