NO742656L - - Google Patents
Info
- Publication number
- NO742656L NO742656L NO742656A NO742656A NO742656L NO 742656 L NO742656 L NO 742656L NO 742656 A NO742656 A NO 742656A NO 742656 A NO742656 A NO 742656A NO 742656 L NO742656 L NO 742656L
- Authority
- NO
- Norway
- Prior art keywords
- intermediate piece
- hypodermic needle
- polyester
- needle device
- stated
- Prior art date
Links
- 229920000728 polyester Polymers 0.000 claims description 20
- 239000000314 lubricant Substances 0.000 claims description 5
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 4
- -1 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000000344 soap Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 2
- 239000008116 calcium stearate Substances 0.000 claims description 2
- 235000013539 calcium stearate Nutrition 0.000 claims description 2
- 239000001023 inorganic pigment Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical group [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims 1
- 239000004677 Nylon Substances 0.000 description 8
- 229920001778 nylon Polymers 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920001074 Tenite Polymers 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
Hypodermisk nålanordning. Hypodermic needle device.
Foreliggende oppfinnelse angår hypodermiske nålanord-ninger, omfattende selve kanylen og et mellomstykke av plast som gjør det mulig å feste nålen til munnstykket på en legesprøyte. The present invention relates to hypodermic needle devices, comprising the cannula itself and an intermediate piece of plastic which makes it possible to attach the needle to the nozzle of a medical syringe.
Mellomstykket på slike anordninger fremstilles av poly-styren, polypropylen eller nylon 6. Anordninger der et nylon mellomstykke er sveiset til nålen ved transientsmelting av materialet i mellomstykket like rundt nålen fremstilles og brukes i stor utstrek-ning . Detaljene ved utførelsen og ved produksjonen av slike nål-anordninger er velkjent og skal ikke beskrives i detalj her. The intermediate piece on such devices is made of polystyrene, polypropylene or nylon 6. Devices where a nylon intermediate piece is welded to the needle by transient melting of the material in the intermediate piece just around the needle are manufactured and used to a large extent. The details of the design and manufacture of such needle devices are well known and shall not be described in detail here.
Nylon er et tilfredsstillende materiale for mellomstykket i mange henseender, og særlig får man en god binding mellom mellom stykke og nål ved sveising, men man har den ulempe at nylon opptar fuktighet når det utsettes for betingelser der fuktighetsgraden er høy og nylonet vil endre sine dimensjoner ved dette. Nylon is a satisfactory material for the intermediate piece in many respects, and in particular you get a good bond between the intermediate piece and the needle when welding, but it has the disadvantage that nylon absorbs moisture when it is exposed to conditions where the degree of humidity is high and the nylon will change its dimensions by this.
Det har nu vist seg at støpte polyestere har de samme fordelaktige egenskaper som nylon som mellomstykkemateriale, og samtidig opptar det ikke fuktighet når det utsettes for fuktige omgivel-ser, samtidig med at materialet er dimensjonsstabilt. It has now been shown that molded polyesters have the same advantageous properties as nylon as an intermediate piece material, and at the same time it does not absorb moisture when exposed to moist environments, while the material is dimensionally stable.
Foreliggende oppfinnelse angår således en hypodermisk nålanordning der mellomstykket er formet av en støpbar polyester. The present invention thus relates to a hypodermic needle device in which the intermediate piece is formed from a moldable polyester.
Polyestere er en velkjent klasse av polymerer og fremstilles i store, emengder til fabrikasjon av fibre, filamenter og filmer. I de senere år er polyestere av forskjellig art, hvorav noen er kjemisk sett lik polyestere som benyttes for filmer og filmproduksjon, også blir.anvendt som støpbar plast, og en hvilken som helst polyester som kan støpes kan i prinsippet benyttes til formning av mellomstykket på nålanordningen i henhold til oppfinnelsen. Passende polyestere er f.eks. polyetylentereftalat (finnes som en støpbar polymer fra Akzo under varemerket "ARNITE" og fira Hoechst under varemerket "HOSTADUR"), polytetrametyltereftalat (fåes som en støpbar polymer fra Imperial Chemical Industries Limited under varemerket "DEROTON" Polyesters are a well-known class of polymers and are produced in large quantities for the manufacture of fibres, filaments and films. In recent years, polyesters of various kinds, some of which are chemically similar to polyesters used for films and film production, are also being used as moldable plastics, and any polyester that can be molded can in principle be used to form the intermediate part of the needle device according to the invention. Suitable polyesters are e.g. polyethylene terephthalate (available as a castable polymer from Akzo under the trademark "ARNITE" and from Hoechst under the trademark "HOSTADUR"), polytetramethyl terephthalate (available as a castable polymer from Imperial Chemical Industries Limited under the trademark "DEROTON"
og fra Hoechst under varemerket "HOSTADUR" BVP 8699) og det polyester som dannes av 1,4-cykloheksyl-dimetylenglykol og en blanding av en hoveddel av tereftalsyre og en mindre del av isoftalsyre som fåes fra Eastman Kodak under varemerket "TENITE" 7DR0. Av disse foretrekkes and from Hoechst under the trademark "HOSTADUR" BVP 8699) and the polyester formed from 1,4-cyclohexyl-dimethylglycol and a mixture of a major part of terephthalic acid and a minor part of isophthalic acid obtained from Eastman Kodak under the trademark "TENITE" 7DR0. Of these is preferred
det å anvende polyetylentereftalat.the use of polyethylene terephthalate.
Det polyester som benyttes kan være enten i amorf eller krystallin form, og den sistnevnte krever normalt høyere støpetempe-raturer. The polyester used can be either in amorphous or crystalline form, and the latter normally requires higher casting temperatures.
Munnstykker for hypodermiske nåler blir vanligvis frem-stilt ved sprøytestøping. Polyestere kan sprøytestøpes for å danne mellomstykkene, og hvert mellomstykke kan så settes sammen med en nål og sveises til denne under de samme betingelser og ved anvendelse av de samme maskiner som da nylon ble benyttet som mellomstykkemateriale. Som et alternativ kan nålen festes til mellomstykket ved harpiks-binding eller ved mekanisk anlegg mellom nål og mellomstykke, og nålen kan i det sistnevnte tilfelle ha passende utvendige fremspring, f.eks. en skruegjenge. Litt smøremiddel kan tilsettes polyestere for å lette støpingen. Nozzles for hypodermic needles are usually produced by injection molding. Polyesters can be injection molded to form the spacers, and each spacer can then be assembled with a needle and welded to it under the same conditions and using the same machines as when nylon was used as spacer material. As an alternative, the needle can be attached to the intermediate piece by resin bonding or by mechanical contact between needle and intermediate piece, and in the latter case the needle may have suitable external projections, e.g. a screw thread. A little lubricant can be added to polyesters to facilitate casting.
Passende smøremidler er alkalimetalliske såper og alkaliske jordmetallsåper, såsom natrium- eller kalsiumstearat. Et passende innhold av smøremidler er fra 0,1 til 0,2 vekts-% basert på polyestermengden. Suitable lubricants are alkali metal soaps and alkaline earth metal soaps, such as sodium or calcium stearate. A suitable content of lubricants is from 0.1 to 0.2% by weight based on the amount of polyester.
Hypodermiske mellomstykker for nåler kan med fordel fargekodes for å vise "dimensjonene på den nål de sitter på,og den nødvendige fargemengde behøver ikke være mer enn 0,1 vekts-% av polyesteret, og de uorganiske pigmenter som vanligvis benyttes for dette formål kan lett anvendes sammen med de polyestere som skal benyttes i henhold til oppfinnelsen. Hypodermic spacers for needles can advantageously be color-coded to show the dimensions of the needle they sit on, and the required amount of color need not be more than 0.1% by weight of the polyester, and the inorganic pigments usually used for this purpose can be easily used together with the polyesters to be used according to the invention.
Som angitt ovenfor er en hovedfordel med mellomstykker av polyester for hypodermiske nåler sammenliknet med mellomstykker av nylon at de ikke absorberer fuktighet under betingelser med høyt fuktighetsinnhold og at de er dimensjonsstabile under slike betingelser. En annen fordel nåleanordningen i henhold til oppfinnelsen er at bindingsstyrken mellom nålen og mellomstykket bare blir meget svakt påvirket under vanskelige lagringsbetingelser, det vil si lagring under høy temperatur og i høy fuktighet. As indicated above, a major advantage of polyester spacers for hypodermic needles compared to nylon spacers is that they do not absorb moisture under high moisture conditions and that they are dimensionally stable under such conditions. Another advantage of the needle device according to the invention is that the bond strength between the needle and the intermediate piece is only very slightly affected under difficult storage conditions, i.e. storage under high temperature and high humidity.
Nålmunnstykker av polyestere tåler sterilisering ved gamastråling eller andre behandlingsformer like godt som nylon mellomstykker gjør. Needle nozzles made of polyester withstand sterilization by gamma radiation or other forms of treatment just as well as nylon spacers do.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO762056A NO762056L (en) | 1973-07-20 | 1976-06-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3504673A GB1460719A (en) | 1973-07-23 | 1973-07-23 | Hypodermic needle assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO742656L true NO742656L (en) | 1975-02-17 |
Family
ID=10373166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO742656A NO742656L (en) | 1973-07-20 | 1974-07-19 |
Country Status (6)
| Country | Link |
|---|---|
| DK (1) | DK394774A (en) |
| ES (1) | ES428488A1 (en) |
| FR (1) | FR2238504B1 (en) |
| GB (1) | GB1460719A (en) |
| IT (1) | IT1016946B (en) |
| NO (1) | NO742656L (en) |
-
1973
- 1973-07-23 GB GB3504673A patent/GB1460719A/en not_active Expired
-
1974
- 1974-07-19 NO NO742656A patent/NO742656L/no unknown
- 1974-07-22 DK DK394774A patent/DK394774A/da unknown
- 1974-07-22 IT IT52218/74A patent/IT1016946B/en active
- 1974-07-22 ES ES428488A patent/ES428488A1/en not_active Expired
- 1974-07-23 FR FR7425581A patent/FR2238504B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1016946B (en) | 1977-06-20 |
| GB1460719A (en) | 1977-01-06 |
| DK394774A (en) | 1975-03-10 |
| FR2238504B1 (en) | 1978-06-16 |
| FR2238504A1 (en) | 1975-02-21 |
| ES428488A1 (en) | 1976-11-16 |
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