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US20070173147A1 - Fluoroplastic articles and producing method thereof - Google Patents

Fluoroplastic articles and producing method thereof Download PDF

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Publication number
US20070173147A1
US20070173147A1 US11/501,152 US50115206A US2007173147A1 US 20070173147 A1 US20070173147 A1 US 20070173147A1 US 50115206 A US50115206 A US 50115206A US 2007173147 A1 US2007173147 A1 US 2007173147A1
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US
United States
Prior art keywords
fluoroplastic
meshwork
metal
article
inner
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.)
Abandoned
Application number
US11/501,152
Inventor
Wei Zhao
Guolong Chen
Yonggao Zhao
Original Assignee
Wei Zhao
Guolong Chen
Yonggao Zhao
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
Priority to CN200610023720.5 priority Critical
Priority to CN 200610023720 priority patent/CN100436911C/en
Application filed by Wei Zhao, Guolong Chen, Yonggao Zhao filed Critical Wei Zhao
Assigned to YONGGAO ZHAO reassignment YONGGAO ZHAO ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEN, GUOLONG, ZHAO, WEI, ZHAO, YONGGAO
Publication of US20070173147A1 publication Critical patent/US20070173147A1/en
Application status is Abandoned legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/04Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00Layered products having a general shape other than plane
    • B32B1/08Tubular products
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/04Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/752Corrosion inhibitor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00Tubular articles, e.g. hoses, pipes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49906Metal deforming with nonmetallic bonding
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102Woven scrim
    • Y10T442/109Metal or metal-coated fiber-containing scrim
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102Woven scrim
    • Y10T442/109Metal or metal-coated fiber-containing scrim
    • Y10T442/126Including a preformed film, foil, or sheet

Abstract

The present invention relates to a fluoroplastic article, comprising inner and outer fluoroplastic layers and a metal meshwork, the metal meshwork is arranged between the inner and outer fluoroplastic layers, characterized by that said meshwork can be stretched and compressed in the axial direction.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a fluoroplastic article, particularly to a fluoroplastic article with liner made of metal meshwork.
  • DESCRIPTION OF THE RELATED ART
  • It has well known that fluoroplastic, particularly polytetrafluoroethylene plastic (briefly to say, F4 or PTFE) is used as liners of steel members such as anticorrosive tubes, towers and vessels. When an article made of F4 is used as liners of a steel member, due to a high difference of thermal coefficient of expansion between the article and the steel member, usually they will be destroyed during using. Thus, it has restricted the wide use of this new material in anticorrosive fields. Therefore, the inventor has proposed a F4 liner with metal web laid in it, such that the excessive expansion of the anticorrosive article made of F4 gets restricted during being heated, so as to increase the life of the F4 liner. But the grids of the metal web in the above solution are invariable square one, that is, the wire of the web is fixedly connected with each other, so the metal web can't be stretched and compressed optionally, as shown in FIG. 1. There are two shortcomings existing in the web with this structure. 1) Since the grids of the metal web can't be stretched and compressed, when the fluoroplastic article is placed into a tube for example and is expanded to be flanged at the two ends, the metal web in the fluoroplastic article can't be flanged together with the fluoroplastic layer. Thus, the quality and performance of the fluoroplastic article are deteriorated. 2) In the winding process during producing the fluoroplastic article, the metal web with above structure can merely be laid outside of the fluoroplastic belt, but can't be made into meshwork and placed in the fluoroplastic layers. Because the diameter of the meshwork with this structure is not stretchable and compressible optionally and the meshwork is difficult to abut against the fluoroplastic inner layer closely, when the fluoroplastic belt is winding outside of the inner layer, the web will distort. When the article is sintered at a high temperature, since the F4 belt, metal web and glass belt can't be pressed against each other closely, the inner pressure due to the expansion is insufficient, and the metal web will disorder and displace. Thus, the finished articles will have a low density and there will be small holes in the structure. At the same time, these articles will have a trend to crack and will have a high ratio of defective and waste products.
  • SUMMARY OF THE INVENTION
  • The problem to be solved of the present invention is to provide a fluoroplastic article with a liner made of metal meshwork. It can overcome above shortcomings arising in prior fluoroplastic articles, whose liners are made of metal web with fixed grids.
  • The fluoroplastic article according to the invention is composed of inner and outer fluoroplastic layers and a metal meshwork. The metal meshwork arranged between the inner and outer fluoroplastic layers can be stretched and compressed in the axial direction.
  • In order to stretch and compress metal meshwork in the axial direction, the grids of the metal meshwork have variable rhombic shape. They are formed by interweaving metal wires or through welding metal webs with stretchable and compressible rhombic grids.
  • The advantage of the invention is set forth in the following. 1) Since the metal meshwork is stretchable and compressible, it can be compressed according to the diameter of the inner layer of the wound fluoroplastic article. As the result of being compressed, the diameter of the meshwork extends to be larger than that of the inner layer of the fluoroplastic article. Then, the inner layer of the fluoroplastic article is sheathed by the compressed meshwork. The latter is stretched and the diameter gets small. In this way, the meshwork abuts against the outside of the inner layer. Next, the fluoroplastic outer layer is wound around the meshwork continuously. During winding, the grids of the metal meshwork vary with the state of winding and forces. Thus, the metal meshwork is arranged between the inner and outer layer of the fluoroplastic article submissively, neatly, normally and uniformly without any disorders and displacements. Thereby, both quality and yield of articles are improved. 2) Since the diameter of the meshwork is variable, when the fluoroplastic article with the metal meshwork is lined in a metal member, the metal meshwork can be flanged together with the fluoroplastic layer. Therefore, both quality and performance of the member are improved. 3) As the force applied to different parts of the meshwork is uniform, the article doesn't deform at a high temperature. 4) Since the product of the diameter and the length of the meshwork is a constant, during producing and using, the meshwork will elongate longitudinally and the diameter will expand in the transverse direction with the rise of temperature. Since the tendency to elongate longitudinally and the tendency to expand transversely are restricted with each other, both the length and the diameter of the meshwork can't change. Thus, the performance of expanding with heat and contracting with cold of the article is in an optimum state. 5) Since the metal meshwork of the article is stretchable, during winding or being sintered at high temperature, the meshwork never displaces and will abut against inner and outer fluoroplastic layers closely. Thus, the problem arising by metal web with invariable grids is dissolved absolutely, and the sintered article has a high density and strength, and a good quality and a high success ratio as well. Meanwhile, the finished article whose surface is smooth also has no blowholes or cracks.
  • Detailed description of exemplary embodiments will be described in conjunction with the accompanying drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic view of the square web with fixed grids, which is used in prior fluoroplastic articles.
  • FIG. 2 is a schematic view of the metal meshwork according to the invention, which has variable rhombic grids.
  • FIG. 3 is a schematic view of the metal meshwork in FIG. 2, which is in the compressed state.
  • FIG. 4 is a schematic view of the metal meshwork in FIG. 2, which is in the stretched state.
  • FIG. 5 is a schematic view of the change of metal meshwork according to the invention in the flanged portion, this portion is formed by the metal meshwork engaged with a tube.
  • FIG. 6 is an section view taken from arrow A-A in FIG. 5.
  • DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
  • The embodiment shown in FIG. 2, FIG. 5 and FIG. 6 is a fluoroplastic article with a metal meshwork. It is used as liners of metal tubes and composed of inner and outer fluoroplastic layers 1 and a metal meshwork 2. The metal meshwork 2 is arranged between the inner and outer fluoroplastic layers. The grids 3 of the metal meshwork 2 have variable rhombic shape and can be formed by interweaving metal wires. They also can be made through welding metal webs with stretchable and compressible rhombic grids. The metal meshwork with such a configuration can be stretched and compressed in the axial direction.
  • The above fluoroplastic articles with metal meshwork can be made by following processes: (1) A thin fluoroplastic (e.g. F4) belt is wound around a stainless steel mold back and forth until the desired thickness reaches, so as to make the inner layer of the article; (2) The metal meshwork which is compressible in the axial direction is compressed, so that the diameter of the meshwork is larger than that of the fluoroplastic inner layer. Then, the fluoroplastic inner layer is sheathed by the compressed meshwork. The latter is stretched and the diameter of it gets small. As the result, the meshwork abuts against the fluoroplastic inner layer closely; (3) The thin fluoroplastic belt is wound around the metal meshwork until the desired thickness reaches, so as to make the outer layer of the article; (4) The outer layer is closely strapped by a glass belt; (5) The strapped fluoroplastic prefabricated article is placed into an oven. The article is finished after being sintered in the oven. The temperature of the sintering oven may be set according to the different composition of the fluoroplastic. When F4 plastic is used, The temperature of the oven is about 380° C.

Claims (4)

1. A fluoroplastic article, comprising inner and outer fluoroplastic layers and a metal meshwork, the metal meshwork being arranged between the inner and outer fluoroplastic layers, wherein said meshwork is stretchable and compressible in the axial direction.
2. A fluoroplastic article according to claim 1, wherein the grids of said meshwork have a variable rhombic shape and comprise interweaving metal wires.
3. A fluoroplastic article according to claim 1, wherein said meshwork comprises welded metal webs with stretchable and compressible rhombic grids.
4. A method of producing the fluoroplastic article according to claim 1, comprising:
(1) winding a thin fluoroplastic belt around a stainless steel mold back and forth until the desired thickness is reached, so as to make an inner layer of the article;
(2) compressing the metal meshwork which is compressible in the axial direction, so that the diameter of it is larger than that of the fluoroplastic inner layer, after the fluoroplastic inner layer is sheathed by the compressed meshwork, the latter is stretched and the diameter is made smaller, such that the meshwork closely abuts against the fluoroplastic inner layer;
(3) winding the thin fluoroplastic belt around the metal meshwork until the desired thickness is reached, so as to make the outer layer of the article;
(4) closely strapping the outer layer with a glass belt;
(5) placing and sintering the strapped fluoroplastic article in an oven where it is to form the finished article.
US11/501,152 2006-01-25 2006-08-07 Fluoroplastic articles and producing method thereof Abandoned US20070173147A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200610023720.5 2006-01-25
CN 200610023720 CN100436911C (en) 2006-01-25 2006-01-25 Fluorine plastic product and making method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/371,529 US8551273B2 (en) 2006-01-25 2009-02-13 Method for forming fluoroplastic articles

Related Child Applications (1)

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US12/371,529 Division US8551273B2 (en) 2006-01-25 2009-02-13 Method for forming fluoroplastic articles

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US20070173147A1 true US20070173147A1 (en) 2007-07-26

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US11/501,152 Abandoned US20070173147A1 (en) 2006-01-25 2006-08-07 Fluoroplastic articles and producing method thereof
US12/371,529 Active 2028-07-20 US8551273B2 (en) 2006-01-25 2009-02-13 Method for forming fluoroplastic articles

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CN (1) CN100436911C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101132657B (en) 2007-09-21 2011-09-21 赵永镐 Polytetrafluoroethylene heating product and method of manufacturing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2116668A (en) * 1936-09-24 1938-05-10 Cons Expanded Metal Companies Reinforcement for plastic material
US4029837A (en) * 1975-08-14 1977-06-14 William C. Heller, Jr. Composite plastic-metallic bonding means and method
US4974303A (en) * 1988-06-08 1990-12-04 Yonggao Zhao Anticorrosive product lined with polytetrafluorothylene and the method for making the same
US6204301B1 (en) * 1998-12-17 2001-03-20 Japan Atomic Energy Research Institute Fluoroplastic composites and a process for producing the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122142A (en) * 1977-08-05 1978-10-24 Owens-Illinois, Inc. Method for blow molding a reinforced plastic bottle
US5590691A (en) 1994-05-02 1997-01-07 Itt Corporation Extruded multiple plastic layer coating bonded to a metal tube
CN2202838Y (en) 1994-10-31 1995-07-05 天津市八龙特塑料制品有限公司 Plastics and steel wire weaving composite pipe
CN2227248Y (en) 1994-12-21 1996-05-15 成锦明 High-intensity metal carcase plastic compound tube
JP3053374B2 (en) * 1997-07-03 2000-06-19 市川毛織株式会社 Shoe press belt and its manufacturing method
CN2313137Y (en) 1997-12-23 1999-04-07 黑龙江省塑料工业科学研究所 Metal-reinforced plastic composite tube
CN2403978Y (en) 1999-12-14 2000-11-01 朱利平 Plastic pipe
CN2439585Y (en) 2000-05-21 2001-07-18 温州南方国欣设备制造有限公司 Metallic spiral woven net and plastic composite tube

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2116668A (en) * 1936-09-24 1938-05-10 Cons Expanded Metal Companies Reinforcement for plastic material
US4029837A (en) * 1975-08-14 1977-06-14 William C. Heller, Jr. Composite plastic-metallic bonding means and method
US4974303A (en) * 1988-06-08 1990-12-04 Yonggao Zhao Anticorrosive product lined with polytetrafluorothylene and the method for making the same
US6204301B1 (en) * 1998-12-17 2001-03-20 Japan Atomic Energy Research Institute Fluoroplastic composites and a process for producing the same

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Publication number Publication date
US20090145535A1 (en) 2009-06-11
US8551273B2 (en) 2013-10-08
CN100436911C (en) 2008-11-26
CN1807957A (en) 2006-07-26

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Legal Events

Date Code Title Description
AS Assignment

Owner name: YONGGAO ZHAO, CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZHAO, WEI;CHEN, GUOLONG;ZHAO, YONGGAO;REEL/FRAME:018237/0563

Effective date: 20060713