GB2248669A - Plastic tube - Google Patents
Plastic tube Download PDFInfo
- Publication number
- GB2248669A GB2248669A GB9021838A GB9021838A GB2248669A GB 2248669 A GB2248669 A GB 2248669A GB 9021838 A GB9021838 A GB 9021838A GB 9021838 A GB9021838 A GB 9021838A GB 2248669 A GB2248669 A GB 2248669A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- plastic tube
- pvc
- projections
- plastic
- 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.)
- Withdrawn
Links
- 229920003023 plastic Polymers 0.000 title claims abstract description 20
- 239000004033 plastic Substances 0.000 title claims abstract description 20
- 239000004698 Polyethylene Substances 0.000 claims abstract description 13
- 239000004743 Polypropylene Substances 0.000 claims abstract description 13
- 229920000573 polyethylene Polymers 0.000 claims abstract description 13
- 229920001155 polypropylene Polymers 0.000 claims abstract description 13
- -1 polypropylene Polymers 0.000 claims abstract description 6
- 230000003000 nontoxic effect Effects 0.000 claims description 5
- 231100000252 nontoxic Toxicity 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 11
- 239000004800 polyvinyl chloride Substances 0.000 description 11
- 239000003651 drinking water Substances 0.000 description 5
- 235000020188 drinking water Nutrition 0.000 description 5
- 239000007788 liquid Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0078—Measures or configurations for obtaining anchoring effects in the contact areas between layers
- B29C37/0082—Mechanical anchoring
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
A plastic tube comprising a PVC outer tube 1 and a polypropylene or polyethylene inner tube 2. The outer tube 1 has a plurality of lengthwise straight grooves 11 in the inner surface and the inner tube 2 has the same number and size of lengthwise straight projections 21 in the outer surface to fit closely in said grooves 11 in the outer tube 1 when the outer and the inner tubes are assembled together. The composite tube has the characteristics of easy joining and of no pollution to water to be transported therein. <IMAGE>
Description
PLASTIC TUBE
At present, plastic tubes for transporting drinking water or liquid are made of PE (poly ethylene), PP (poly propylene) or PVC (poly vinyl chloride), but pure PE or PP tubes have no capillary holes so that they are quite difficult to join together. The greatest advantage is that they have no toxin, and PVC tubes can be heated soft to be joined together before they harden. Nevertheless, PVC tubes can give off dioxin C12H4 02C14, a highly toxic chemical contaminant when heated too hot, so if they are used for transporting drinking water, great care has to be taken in processing. The present invention has been devised to provide a plastic tube which is safe for transporting drinking water and easy to join together.
The plastic tube in the present invention comprises an outer tube made of PVC and an inner tube made of PP or PE, having the hard PVC section interlocking with the soft PP or
PE section so that it is easy to join sections together.
This makes use of the properties of PVC and it does not pollute drinking water or liquid to be transported therein thus making use of the non-toxic property of PP and PE.
The inner tube may have a plurality of lengthwise straight projections on the outer surface and the outer tube may have the same number and size of lengthwise straight grooves to fit closely with said projections when both tubes are assembled together.
Brief Description Of The Drawings
Figure 1 is a perspective view of the plastic tube in accordance with the present invention.
Figure 2 is a cross-sectional view of the plastic tube in the present invention.
Figure 3 is a cross-sectional view of the first embodiment of the plastic tube in the present invention.
Figure 4 is a cross-sectional view of the second embodiment of the plastic tube in the present invention.
Figure 5 is a cross-sectional view of the third embodiment of the plastic tube in the present invention.
Figure 6 is a cross-sectional view of the fourth embodiment of the plastic tube in the present invention.
The plastic tube according to the present invention, as shown in Fig. 1, comprises outer tube 1 made of PVC and inner tube 2 made of non-toxic PE or PP. Inner tube 2 is soft and provided on the outer surface with a plurality of lengthwise straight projections 21, which has the upper wider than the lower. Outer tube 1 has on the inner surface the same number and size of lengthwise straight grooves 11 as said projections 21 of inner tube 2 so that both 11 and 21 can closely fit with each other in combining both the tubes 1 and 2.
As shown in Fig. 2, the non-toxic inner tube of this plastic tube contacts with drinking water without any danger of pollution of the water in transporting it, as the PVC outer tube is separated by the inner tube from contacting water to be transported therein.
Next, as shown in Figs. 3, 4, 5 and 6, the configuration of the projections 21 and the grooves 11 fitting closely with each other can be widely changed to have a profile which is trapezoid, oval, lozenge-shaped etc., as long as the outer and the inner tube do not separate from each other and fit with each other closely.
The PVC section of this plastic tube can be made use of for joining and the non-toxic PP or PE section for contact with water in transporting it, and this feature is quite different from the PP, PE or PVC tube made of a single material. This tube is especially advantageous for use in a cold land or an area where earthquakes often occur.
Claims (5)
1. A plastic tube comprising an outer tube made of
PVC and an inner soft tube made of non-toxic PE (poly ethylene) or PP (poly propylene).
2. A plastic tube as claimed in claim 1, having the hard PVC section interlocking with the soft PP or PE section so that it is easy to join sections together.
3. A plastic tube as claimed in claim 1, wherein the inner tube has a plurality of lengthwise straight projections on the outer surface and the outer tube has on the inner surface the same number and size of lengthwise straight grooves for said projections on the inner tube to fit closely to prevent the tubes from separating from each other after assembly.
4. A plastic tube as claimed in claim 3, wherein the profile of the lengthwise straight projections and grooves is trapezoid, oval, lozenge-shaped or polygonal, etc.
5. A plastic tube as claimed in claim 1 substantially as disclosed herein with reference to any of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9021838A GB2248669A (en) | 1990-10-08 | 1990-10-08 | Plastic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9021838A GB2248669A (en) | 1990-10-08 | 1990-10-08 | Plastic tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9021838D0 GB9021838D0 (en) | 1990-11-21 |
| GB2248669A true GB2248669A (en) | 1992-04-15 |
Family
ID=10683384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9021838A Withdrawn GB2248669A (en) | 1990-10-08 | 1990-10-08 | Plastic tube |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2248669A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994005533A1 (en) * | 1992-09-04 | 1994-03-17 | Itt Automotive Europe Gmbh | Process for securing a windshield wiper shaft in its bearing housing, and windshield wiper, in particular for cleaning motor vehicle windshields |
| WO1997013631A1 (en) * | 1995-10-11 | 1997-04-17 | Crown Cork & Seal Company, Inc. | Multi-layer laminated preform and method of its manufacture |
| WO1997010936A3 (en) * | 1995-09-20 | 1997-05-15 | Uponor Bv | Method for heating and/or cross-linking of polymers and apparatus therefor |
| GB2377979A (en) * | 2001-07-24 | 2003-01-29 | Petrotechnik Ltd | Improved pipe |
| EP2495464A1 (en) * | 2011-03-03 | 2012-09-05 | TPR Co., Ltd. | Support member |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB965282A (en) * | 1961-01-26 | 1964-07-29 | Uni Tubes Ltd | Improvements in or relating to flexible tubing |
| GB994511A (en) * | 1961-09-13 | 1965-06-10 | Btr Industries Ltd | Improvements in or relating to rubber hose |
| GB1546023A (en) * | 1976-03-01 | 1979-05-16 | Orfino F | Composite tube made of coupled different plastic materials and method for manufacturing the same |
-
1990
- 1990-10-08 GB GB9021838A patent/GB2248669A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB965282A (en) * | 1961-01-26 | 1964-07-29 | Uni Tubes Ltd | Improvements in or relating to flexible tubing |
| GB994511A (en) * | 1961-09-13 | 1965-06-10 | Btr Industries Ltd | Improvements in or relating to rubber hose |
| GB1546023A (en) * | 1976-03-01 | 1979-05-16 | Orfino F | Composite tube made of coupled different plastic materials and method for manufacturing the same |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994005533A1 (en) * | 1992-09-04 | 1994-03-17 | Itt Automotive Europe Gmbh | Process for securing a windshield wiper shaft in its bearing housing, and windshield wiper, in particular for cleaning motor vehicle windshields |
| US5634726A (en) * | 1992-09-04 | 1997-06-03 | Itt Automotive Europe Gmbh | Method of fixating a shaft in its bearing casing in wiper installations, as well as wiper installation, in particular for cleaning the windscreen of an automotive vehicle |
| WO1997010936A3 (en) * | 1995-09-20 | 1997-05-15 | Uponor Bv | Method for heating and/or cross-linking of polymers and apparatus therefor |
| US6106761A (en) * | 1995-09-20 | 2000-08-22 | Wirsbo Bruks Ab | Method for heating and/or cross-linking of polymers and apparatus therefor |
| WO1997013631A1 (en) * | 1995-10-11 | 1997-04-17 | Crown Cork & Seal Company, Inc. | Multi-layer laminated preform and method of its manufacture |
| GB2377979A (en) * | 2001-07-24 | 2003-01-29 | Petrotechnik Ltd | Improved pipe |
| GB2377979B (en) * | 2001-07-24 | 2005-06-15 | Petrotechnik Ltd | Improved pipe |
| EP2495464A1 (en) * | 2011-03-03 | 2012-09-05 | TPR Co., Ltd. | Support member |
| CN103062229A (en) * | 2011-03-03 | 2013-04-24 | 帝伯爱尔株式会社 | Support member |
| US8801291B2 (en) | 2011-03-03 | 2014-08-12 | Tpr Co., Ltd. | Support member |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9021838D0 (en) | 1990-11-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |