GB2248669A - Plastic tube - Google Patents

Plastic tube Download PDF

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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Withdrawn
Application number
GB9021838A
Other versions
GB9021838D0 (en
Inventor
Fu Yaw Cheng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9021838A priority Critical patent/GB2248669A/en
Publication of GB9021838D0 publication Critical patent/GB9021838D0/en
Publication of GB2248669A publication Critical patent/GB2248669A/en
Withdrawn legal-status Critical Current

Links

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)

CLAIMS:
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.
GB9021838A 1990-10-08 1990-10-08 Plastic tube Withdrawn GB2248669A (en)

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)

* Cited by examiner, † Cited by third party
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
WO1997010936A2 (en) * 1995-09-20 1997-03-27 Uponor B.V. 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
EP2495464A1 (en) * 2011-03-03 2012-09-05 TPR Co., Ltd. Support member

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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 (11)

* Cited by examiner, † Cited by third party
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
WO1997010936A2 (en) * 1995-09-20 1997-03-27 Uponor B.V. Method for heating and/or cross-linking of polymers and apparatus therefor
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)