CN111619178A - Coiled core tube and preparation method thereof - Google Patents

Coiled core tube and preparation method thereof Download PDF

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Publication number
CN111619178A
CN111619178A CN202010406956.7A CN202010406956A CN111619178A CN 111619178 A CN111619178 A CN 111619178A CN 202010406956 A CN202010406956 A CN 202010406956A CN 111619178 A CN111619178 A CN 111619178A
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CN
China
Prior art keywords
core
tube
epe
pipe
tube core
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Pending
Application number
CN202010406956.7A
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Chinese (zh)
Inventor
戴霖斌
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Xiamen Meisu Industry And Trade Co ltd
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Xiamen Meisu Industry And Trade Co ltd
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Priority to CN202010406956.7A priority Critical patent/CN111619178A/en
Publication of CN111619178A publication Critical patent/CN111619178A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207—Heat-activated adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207—Heat-activated adhesive
    • B32B2037/1215—Hot-melt adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

The invention relates to a coiled core tube and a preparation method thereof.A tube inner sleeve prepared by EPE is filled and bonded between an inner tube core and an outer tube core, and the inner tube core is fixed, so that the overall production cost is low; and the density of the EPE core material and the EPE surface material of the sleeve part in the tube can be adjusted according to the actual use requirement, so that the parameter performance of the core-rolling tube can be changed. The inner tube core, the outer tube core and the tube internal member are prepared respectively, and then are bonded into a whole through hot melt adhesive, the inner tube core, the outer tube core and the tube internal member can be produced and combined into the roll core tubes with different specifications respectively only by correspondingly arranging the injection molds of the inner tube core and the outer tube core and the stamping molds of the tube internal member with different specifications, the production equipment and the injection molds have strong universality, the products with different specifications can be prepared conveniently, and the equipment investment is greatly reduced. The number of the pipe internal components can be set according to implementation requirements, so that the cost is saved while the strength of the scroll pipe is ensured; and the setting position of the sleeve inside the tube can be adjusted according to the length of the core rolling tube, so that the method is suitable for preparing products with any size.

Description

Coiled core tube and preparation method thereof
Technical Field
The invention relates to the technical field of strips, in particular to a core rolling tube and a preparation method of the core rolling tube.
Background
In the prior art, as shown in fig. 1, a core tube is manufactured by ABS injection molding, wherein an inner tube core and an outer tube core are connected and supported by a support structure. The core rolling pipe with the common structure is of an integrated structure, and is extruded and molded by an extruder, so that the supporting structure is not disconnected along the length direction of the core rolling pipe, and the material cost is high during preparation; if the supporting structure needs to be disconnected in the length direction of the core rolling tube, another extrusion device needs to be arranged, the equipment investment is large, and the preparation cost is high.
On the other hand, the core rolling tube of each specification comprises different diameters of the inner tube core and the outer tube core, different strength between the inner tube core and the outer tube core, and the like, a set of specific injection mold needs to be opened corresponding to the core rolling tube of one specification, and the mold cost is extremely high; in addition, the injection molds of various specifications cannot be shared, and the overall production cost cannot be further reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a coiled core tube and a preparation method thereof, so that the requirements of low material cost, low preparation cost, universality of an injection mold and the like are met, and the production cost can be reduced on the whole.
The technical scheme of the invention is as follows:
a core-rolling tube comprises an inner tube core and an outer tube core, wherein the inner tube core is arranged in the outer tube core, a plurality of tube internal parts are sleeved on the outer side of the inner tube core, the tube internal parts are filled between the inner tube core and the outer tube core, and the inner tube core is fixed in the outer tube core; the pipe internal member include EPE core, two EPE plane materiel set up respectively in the first surface and the second surface of EPE core, the hardness of EPE plane materiel is greater than the hardness of EPE core.
Preferably, the density of the EPE face material is 100kg/m3-110kg/m3The density of the EPE core material is 25kg/m3-28kg/m3。
Preferably, the EPE surface material and the EPE core material, the outer side of the inner tube core and the inner side wall of the tube bundle, and the inner side of the outer tube core and the outer winding surface of the tube bundle are fixed by hot melt adhesive.
Preferably, the softening temperature of the hot melt adhesive is greater than 100 ℃.
Preferably, the plurality of tube internal parts are sleeved outside the inner tube core at intervals.
Preferably, the device comprises at least three tube internal parts, wherein at least one tube internal part is respectively arranged at two ends of the inner tube core or the outer tube core, and at least one tube internal part is arranged at the middle position of the inner tube core and the outer tube core.
Preferably, the EPE face material and EPE core material are made of HDPE foam.
Preferably, the tube inner sleeve is of a circular ring structure, and the inner tube core and the outer tube core are coaxially fixed.
A method for preparing a core-rolled tube comprises the following steps:
1) coating hot melt adhesive on the outer side surface of the inner tube core;
2) sleeving the tube internal member outside the inner tube core;
3) coating hot melt adhesive on the outer surface of the pipe inner sleeve;
4) the outer pipe core is sleeved on the outer winding surface of the pipe inner sleeve and fixed through hot melt adhesive.
Preferably, the method for preparing the tube kit comprises the following steps: firstly, preparing a sandwich sheet, wherein the sandwich sheet comprises an EPE core material and two EPE surface materials, and the two EPE surface materials are respectively arranged on a first surface and a second surface of the EPE core material; and then stamping the sandwich sheet material corresponding to the outer diameter of the inner tube core and the inner diameter of the outer tube core to obtain the tube internal member.
The invention has the following beneficial effects:
according to the core-rolling tube, the inner tube core is fixed by filling and adhering the inner tube sleeve made of EPE between the inner tube core and the outer tube core, so that the overall production cost is low; and the density of the EPE core material and the EPE surface material of the sleeve part in the tube can be adjusted according to the actual use requirement, so that the parameter performance of the core-rolling tube can be changed. Based on the structure of the invention, the core-rolling tubes with different specifications can be respectively produced and combined by only correspondingly arranging the injection molds of the inner tube core and the outer tube core with different specifications and the stamping mold of the tube internal part, and the universality of the mold is greatly improved.
The number of the pipe internal components can be set according to implementation requirements, so that the cost is saved while the strength of the scroll pipe is ensured; and the setting position of the sleeve inside the tube can be adjusted according to the length of the core rolling tube, so that the method is suitable for preparing products with any size.
According to the preparation method of the core-rolling tube, the inner tube core, the outer tube core and the tube inner sleeve are prepared respectively and then are bonded into a whole through hot melt adhesive, the production equipment and the injection mold are strong in universality, products with different specifications can be prepared conveniently, and the equipment investment is greatly reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a prior art mandrel tube;
FIG. 2 is a schematic structural view of a bobbin;
FIG. 3 is a cross-sectional view of the bobbin;
FIG. 4 is a schematic view of the construction of the intratubular assembly;
FIG. 5 is an exploded view of the construction of the tube bundle;
in the figure: reference numeral 10 denotes an outer tube core, 11 denotes an inner tube core, 20 denotes an inner tube cover, 21 denotes an EPE core, and 22 denotes an EPE face material.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention provides a core-rolling tube for solving the problems of high production cost, high mold cost and non-universal specification in the prior art, and as shown in fig. 2 and 3, the core-rolling tube comprises an inner tube core 11 and an outer tube core 10, wherein the inner tube core 11 is arranged in the outer tube core 10, a plurality of tube-in-tube pipe fittings 20 are sleeved on the outer side of the inner tube core 11, the tube-in-tube pipe fittings 20 are filled between the inner tube core 11 and the outer tube core 10, and the inner tube core 11 is fixed in the outer tube core 10. In this embodiment, the pipe 20 is a circular ring structure, and the inner core 11 and the outer core 10 are coaxially fixed.
As shown in fig. 4 and 5, the pipe-in-pipe member 20 includes an EPE core 21 and two EPE surface materials 22, and the two EPE surface materials 22 are respectively disposed on a first surface and a second surface of the EPE core 21 to form a sandwich structure. The hardness of the EPE face material 22 is greater than that of the EPE core material 21. In the present invention, the EPE surface material 22 is harder than the EPE core material 21, and the material cost of the pipe inside 20 can be reduced while the strength of the pipe inside 20 is ensured. If the pipe inside 20 is made of a single material, i.e. the EPE core material 21 and the EPE surface material 22 have the same hardness, if the hardness is too low, the strength of the pipe inside 20 cannot meet the implementation requirements, and if the hardness is increased to the extent that the strength of the pipe inside 20 meets the implementation requirements, the cost is high.
In this embodiment, the EPE surface material 22 and the EPE core material 21 are made of HDPE foam, that is, the EPE pearl wool (polyethylene foam wool) made of high-density polyethylene HDPE foam is controlled by the foaming ratio corresponding to the hardness of the EPE core material 21 and the EPE surface material 22, and the smaller the foaming ratio, the larger the EPE density, the higher the hardness; whereas the lower the hardness. In the present invention, the density of the EPE face material 22 is 100kg/m3-110kg/m3The density of the EPE core material 21 is 25kg/m3-28kg/m3In this example, the density of the EPE face material 22 was 100kg/m3The density of the EPE core material 21 is 25kg/m3The cost is reduced as much as possible while ensuring that the pipe member 20 in the pipe obtains sufficient strength.
The invention adopts the hot melt adhesive bonding mode for assembly, and concretely, the EPE surface material 22 and the EPE core material 21, the outer side of the inner pipe core 11 and the inner side wall of the inner pipe fitting 20, and the inner side of the outer pipe core 10 and the outer winding surface of the inner pipe fitting 20 are bonded and fixed through the hot melt adhesive. In the embodiment, the softening temperature of the hot melt adhesive is greater than 100 ℃, and preferably, a functional hot melt adhesive with the softening temperature greater than 140 ℃ can be selected. The functional hot melt adhesive is used for bonding and assembling, and the bonding and assembling can be completed only by controlling the temperature, so that the adhesive is convenient and efficient.
To balance cost and performance, in this embodiment, several pipe-in-pipes 20 are spaced around the outside of the inner core 11. Specifically, the tube comprises at least three tube-in-tube tubes 20, at least one tube-in-tube 20 is respectively arranged at two ends of the inner tube core 11 or the outer tube core 10, and at least one tube-in-tube 20 is arranged at the middle position of the inner tube core 11 and the outer tube core 10. During specific implementation, the number and the interval of the pipe fittings 20 in the pipe can be increased according to requirements, and the intervals of the pipe fittings 20 in the pipe can be unequal.
The invention also provides a preparation method of the core-rolling tube, which prepares the inner tube core 11, the outer tube core 10 and the tube fitting 20 in the tube respectively and combines the two into a whole, and concretely comprises the following steps:
1) the outer side surface of the inner tube core 11 is coated with hot melt adhesive;
2) sleeving the pipe fitting 20 in the pipe on the outer side of the inner pipe core 11;
3) coating hot melt adhesive on the outer winding surface of the pipe fitting 20 in the pipe;
4) the outer tube core 10 is sleeved on the outer rolling surface of the tube pipe 20 and fixed by hot melt adhesive.
The preparation method of the pipe fitting 20 in the pipe comprises the following steps: firstly, preparing a sandwich sheet, wherein the sandwich sheet comprises an EPE core material 21 and two EPE surface materials 22, and the two EPE surface materials 22 are respectively arranged on a first surface and a second surface of the EPE core material 21; and then punching the sandwich sheet material corresponding to the outer diameter of the inner pipe core 11 and the inner diameter of the outer pipe core 10 to obtain the pipe fitting 20 in the pipe. The central position of the punched pipe-in-pipe element 20 is a through hole adapted to the inner pipe core 11, and the outer contour of the pipe-in-pipe element 20 is adapted to the outer pipe core 10.
The above examples are provided only for illustrating the present invention and are not intended to limit the present invention. Changes, modifications, etc. to the above-described embodiments are intended to fall within the scope of the claims of the present invention as long as they are in accordance with the technical spirit of the present invention.

Claims (10)

1. A core-rolling tube is characterized by comprising an inner tube core and an outer tube core, wherein the inner tube core is arranged in the outer tube core, a plurality of tube internal parts are sleeved on the outer side of the inner tube core, the tube internal parts are filled between the inner tube core and the outer tube core, and the inner tube core is fixed in the outer tube core; the pipe internal member include EPE core, two EPE plane materiel set up respectively in the first surface and the second surface of EPE core, the hardness of EPE plane materiel is greater than the hardness of EPE core.
2. The tube of claim 1 wherein the EPE facestock has a density of 100kg/m3-110kg/m3The density of the EPE core material is 25kg/m3-28kg/m3。
3. The tube of claim 1, wherein the EPE surface material and the EPE core material, the outer side of the inner tube core and the inner side wall of the tube inner sleeve, and the inner side of the outer tube core and the outer winding surface of the tube inner sleeve are fixed by hot melt adhesive.
4. The spool according to claim 3, wherein the softening temperature of the hot melt adhesive is greater than 100 ℃.
5. The tube of claim 1, wherein a plurality of tube inserts are spaced around the outside of the inner core.
6. The reel pipe according to claim 5, comprising at least three tube internal parts, wherein at least one tube internal part is respectively arranged at two ends of the inner pipe core or the outer pipe core, and at least one tube internal part is arranged at the middle position of the inner pipe core and the outer pipe core.
7. The tube of claim 1 wherein the EPE facestock and EPE core material are HDPE foamed.
8. The tube according to any one of claims 1 to 7, wherein the inner sleeve is a circular ring structure, and the inner tube core and the outer tube core are coaxially fixed.
9. A method of making a convoluted core according to any one of claims 1 to 8, comprising the steps of:
1) coating hot melt adhesive on the outer side surface of the inner tube core;
2) sleeving the tube internal member outside the inner tube core;
3) coating hot melt adhesive on the outer surface of the pipe inner sleeve;
4) the outer pipe core is sleeved on the outer winding surface of the pipe inner sleeve and fixed through hot melt adhesive.
10. The method of manufacturing a coreless roll of claim 9, wherein the method of manufacturing the tube inside member is: firstly, preparing a sandwich sheet, wherein the sandwich sheet comprises an EPE core material and two EPE surface materials, and the two EPE surface materials are respectively arranged on a first surface and a second surface of the EPE core material; and then stamping the sandwich sheet material corresponding to the outer diameter of the inner tube core and the inner diameter of the outer tube core to obtain the tube internal member.
CN202010406956.7A 2020-05-14 2020-05-14 Coiled core tube and preparation method thereof Pending CN111619178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010406956.7A CN111619178A (en) 2020-05-14 2020-05-14 Coiled core tube and preparation method thereof

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Application Number Priority Date Filing Date Title
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US20180117827A1 (en) * 2015-04-22 2018-05-03 Plastic Pipe Mobile Ou A method to produce plastic tube that has at least one stiffener
CN207434760U (en) * 2017-10-12 2018-06-01 康维明工程薄膜（张家港）有限公司 A kind of anti-fold core pipe
CN208994877U (en) * 2018-10-10 2019-06-18 苏州天裕塑胶有限公司 A kind of assembly type core pipe
CN110356051A (en) * 2019-07-22 2019-10-22 西安理工大学 A kind of crash energy absorption equipment of foam filled polygon honeycomb interlayer pipe
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Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4271218A (en) * 1978-02-18 1981-06-02 Firma Carl Freudenberg Pipe insulating jacket
EP0111169A2 (en) * 1982-11-15 1984-06-20 Adolf Rundel Multilayered tube
US5089074A (en) * 1989-09-11 1992-02-18 Dayco Products, Inc. Flexible hose construction and method of making the same
JP2002067145A (en) * 2000-08-30 2002-03-05 Sekisui Chem Co Ltd Method for manufacturing biaxially stretched multilayered synthetic resin pipe
US20020066824A1 (en) * 2000-12-01 2002-06-06 Floyd, Arnold B. Composite core
US20040045619A1 (en) * 2002-07-23 2004-03-11 Backman Arthur L. Crosslinked polyethylene pipe having a high Density polyethylene liner
US20040070222A1 (en) * 2002-10-15 2004-04-15 Wong Joseph Cheuk Mau Insulating sleeve for grasping container and manufacturing method
US20050170117A1 (en) * 2004-01-31 2005-08-04 Cleveland Rafael L. Multi-layered hose
US20060196990A1 (en) * 2005-03-03 2006-09-07 Wallace Marcus T Paper roll core adapter
JP2007276314A (en) * 2006-04-07 2007-10-25 Furukawa Electric Co Ltd:The Composite tube and its manufacturing method
EP2317197A1 (en) * 2009-11-02 2011-05-04 R. Nussbaum AG Dimensionally stable tube for conveying water
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