AU2020103183A4 - A New Type of Wood Winding Pipe and Its Production Method - Google Patents
A New Type of Wood Winding Pipe and Its Production Method Download PDFInfo
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- AU2020103183A4 AU2020103183A4 AU2020103183A AU2020103183A AU2020103183A4 AU 2020103183 A4 AU2020103183 A4 AU 2020103183A4 AU 2020103183 A AU2020103183 A AU 2020103183A AU 2020103183 A AU2020103183 A AU 2020103183A AU 2020103183 A4 AU2020103183 A4 AU 2020103183A4
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- Australia
- Prior art keywords
- veneer
- winding
- wood
- pipe
- composite
- Prior art date
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- 238000004804 winding Methods 0.000 title claims abstract description 96
- 239000002023 wood Substances 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 title description 8
- 239000002131 composite material Substances 0.000 claims abstract description 105
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 32
- 239000004744 fabric Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 210000001145 finger joint Anatomy 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims abstract description 7
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 3
- 238000004513 sizing Methods 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 54
- 239000000853 adhesive Substances 0.000 claims description 52
- 230000001070 adhesive effect Effects 0.000 claims description 52
- 238000001723 curing Methods 0.000 claims description 29
- 238000005470 impregnation Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 12
- 229920000126 latex Polymers 0.000 claims description 12
- 239000004816 latex Substances 0.000 claims description 12
- 238000005496 tempering Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 210000001161 mammalian embryo Anatomy 0.000 claims description 10
- 230000002441 reversible effect Effects 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 9
- 238000007731 hot pressing Methods 0.000 claims description 9
- 229920001568 phenolic resin Polymers 0.000 claims description 9
- 239000005011 phenolic resin Substances 0.000 claims description 9
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 8
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 230000035882 stress Effects 0.000 claims description 5
- 239000004831 Hot glue Substances 0.000 claims description 4
- 229920000877 Melamine resin Polymers 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000004838 Heat curing adhesive Substances 0.000 claims description 3
- 238000013007 heat curing Methods 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 230000032683 aging Effects 0.000 claims description 2
- 210000003298 dental enamel Anatomy 0.000 claims description 2
- 238000001879 gelation Methods 0.000 claims description 2
- 230000008642 heat stress Effects 0.000 claims description 2
- 238000002386 leaching Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- 239000011241 protective layer Substances 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000013022 venting Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000005728 strengthening Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 239000002657 fibrous material Substances 0.000 abstract 1
- 229920006305 unsaturated polyester Polymers 0.000 abstract 1
- 241000219000 Populus Species 0.000 description 15
- 241000219927 Eucalyptus Species 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 240000008790 Musa x paradisiaca Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
- B27D1/086—Manufacture of oblong articles, e.g. tubes by spirally winding veneer blanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/10—Next to a fibrous or filamentary 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
-
- 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
- B32B3/10—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 a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/14—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 a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side
- B32B3/16—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 a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side secured to a flexible backing
-
- 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
- B32B5/02—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 structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
-
- 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
- F16L9/01—Rigid pipes of wood
-
- 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
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
-
- 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
- B32B2250/02—2 layers
-
- 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
- B32B2250/03—3 layers
-
- 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
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary 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
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/026—Wood 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
-
- 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
- B32B2410/00—Agriculture-related articles
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Forests & Forestry (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a new type of wood winding composite pipe and its preparation
method. The process includes the steps of: 1) Taking the fast-growing wood veneer sheet of
longitudinal lengthening with thickness of 0.53.Omm and width of 10.0-500.Omm 1mm as
the main component; 2) The lengthening of the veneer sheet is mainly by back-affixed non
woven cloth or other fibrous materials for reinforcement, followed by finger joint with
strengthening lengthening technology of different sealing stickers to fabricate the composite
pipe; 3) The new type of wood composite pipe is acquired with the fixed-scale sizing of the
composite veneer sheet and different symmetric and antisymmetric winding; 4) Waterproof and
anti-aging protection of the inner and outer wall of the wood composite pipe is carried out by
using the corresponding protection technology. The invention provides an all-wood-based
composite pipe and its preparation method with the characteristics of high utilization ratio of
raw materials and large size that reduces the problems of bad bonding between the inner wall
materials of the wood composite pipe including unsaturated polyester, or the outer wall
protective materials and the bonding interface of the wood material, and the resulting pipe has
excellent performance, good dimensional stability and excellent bonding strength, and can
meet the requirements for the use of pipeline materials, and can be processed into a variety of
specifications of water pressure pipeline or ordinary pipe. It is a new type of environmental
protection pipe.
-1/3
Figure 1
Figure 2
Figure 3
Description
-1/3
Figure 1
Figure 2
Figure 3
A New Type of Wood Winding Pipe and Its Production Method
The invention relates to a new type of wood winding composite pipe and its preparation
method, which is mainly used in agricultural irrigation, water supply and drainage engineering and
related water transmission and heat preservation pipes, and belongs to the field of wood science and technology.
With the rapid development of hydraulic transportation and pipeline transportation engineering in our country, the cement pipe, steel pipe, PVC pipe and glass steel pipe which are commonly used
in transportation pipeline are faced with the problems of large temperature difference in
environment, great temperature difference stress of the pipeline when applied in frigid zones that leads to pipeline microcracks and water permeability. At the same time, with the increasing
demands of environmental protection, the problems of high energy consumption, resource
consumption and great carbon emission of the above-mentioned pipelines, such as cement pipes,
steel pipes, etc., do not meet the requirements of energy-saving and low-carbon, leading to the development bottleneck of the pipeline industry. Therefore, there is an urgent need for a new
technology to achieve pipeline insulation, sustainable resources, and low energy consumption
throughout the production pipeline, so that pipeline production and application can achieve
low-carbon environmental protection. In addition, the original cement, steel and other pipelines have heavy weight and high transportation costs, so the development of light and high-strength
sustainable and friendly pipeline is the main trend of pipeline technology development.
The natural biomass materials, compared with the above non-renewable materials made of the
pipeline, have wide range of the material source, green renewable with light weight and high
strength, and can be used to prepare light high-strength pipeline after scientific and reasonable design. Wood is of large amount in biomass materials with the advantages of green renewable effect
and light and high strength, and can be used in the preparation of transportation pipeline. The high performance wood-based composite pressure transportation pipe and its preparation method
(CN201811149659A) and the wood-based composite pipe and its preparation method (CN104260422A) both adopt the method of plywood. The prepared longitudinal and transverse
wood-based two-ply plate is used as the wood-based base material for winding. The sheet of the
two-ply plate has high brittleness, poor winding performance and low production efficiency after one hot pressing and curing. On the other hand, the above-mentioned two patents have both adopted
the structure of four layers. The interface layer of each layer is the insoluble interface. The poor
interfacial solubility leads to each wound surface layer having obvious delamination cracking, and
the wound wood-based pipeline is difficult to meet the requirements of product application.
The invention relates to a new type of wood winding composite pipe and its preparation
method. The innovation of the invention is to overcome the disadvantages of high hardness, low winding efficiency and poor flexibility of the two-ply plate of the existing wood-based pipe material
structure, to overcome the insurmountable disadvantage of interface separation of different structure
interface layers, and to improve the winding efficiency and product performance of the wood-based
winding composite pipe. The invention takes the longitudinally lengthened veneer sheet of fast-growing wood as the main winding unit, eliminating the hot-pressing compound process of the
two-ply plate in the longitudinal and transverse direction, improving the winding performance of
the unit as well as the production efficiency. And the overall performance of the winding pipe is
improved by strengthening the veneer itself, avoiding the interface separation problem caused by different adhesives when combined with carbon fiber, aluminum, steel, synthetic fiber, etc., and
improving the production efficiency and pipeline performance. The pipeline has light weight, high
strength, good heat preservation, and good electrical insulation, avoiding corrosion to steel pipeline caused by electric current in underground electric field. It has good rigidity, good resistance to
earthquake and geological subsidence, wide source of raw material, and is reproducible and low
carbon in production. Under the temperature difference of wood pipe, the strain damage of large
temperature difference pipe is avoided.
The technical solution of the invention comprises the following process steps: (Claim)
1. A new type of wood winding composite pipe is wound by taking the longitudinal lengthened fast-growing wood veneer sheet with the thickness of 0.5~3.0mm and the width of 30.0~500.0mm 1mm as the main component, which consists of the following technological steps:
1) The fast-growing normalized veneer with thickness of 0.5-3.0mm is treated with
equalization of heat and moister, and sizing is applied with the non-woven or other lining materials,
and the veneer is combined with non-woven cloth or other lining materials to form the composite veneer;
2) The composite veneer with non-woven cloth or lining material is cut along the direction of width to form the veneer sheet with the width of 30.0~500.0mm 1mm, and the end of the
composite veneer is subject to tooth-profile processing to realize the finger joint lengthening of the
composite veneer;
3) Fast curing wood adhesive is applied, such as white latex, urea-formaldehyde resin,
polyvinyl alcohol resin and so on. Then the veneer and lining cloth are used for the tooth-profile bonding at the joint, and then the other side applies the same interfacing of lining bonding to form
the continuous composite veneer sheet;
4) The composite veneer sheet is subject to scale fixing of width on the gauge machine to
reduce or eliminate the non-straightness in the length direction caused by the skew joint in the
process of the composite veneer sheet lengthening. After the veneer sheet is gauged, the non-straightness in the length direction of the composite veneer sheet is less than 0.1%, and then the
composite veneer sheet is rolled into the composite veneer volume;
5) Using epoxy resin, non-saturated polyesters, phenolic resin, urea-formaldehyde resin,
melamine, white latex and other resins which can be bonded with wood as adhesives, the composite
veneer sheet is subject to gum dipping or is coated with glue and then wound onto the core film of
the wood pipe winding equipment to form the wood winding pipe embryo;
6) The wood winding pipe embryo and core film are dried in the drying room until the adhesive is completely cured to form the wood winding composite pipe;
7) According to the functional requirements of the application field, the wood composite
winding pipe can be used directly after being polished or edge banding, or the inner and outer walls of the composite pipe can be coated with the functional protective layer to improve the protective performance to work as the pipe with high protective performance.
2. Step 1) The process of the veneer volume made of fast-growing wood veneer includes the following steps: a) The veneer with thickness of 0.5-3.0mm is cut into the normalized veneer with
the size of 1.22x2.4m or 0.80x2.76m, and the veneer moister content is 10-18%, b) The non-woven
cloth or other cloth is impregnated, then the non-woven cloth or other lining cloth subject to impregnation is combined with the veneer, adopting the breathing rapid hot-pressing process,
venting once every 30-50s, with the hot-pressing temperature of 100-130°C. After 3-5 times of
repetition the veneer is formed, and the veneer flexible back-sticking process is completed; c) The
veneer subject to back-sticking is cut with the required width, then the longitudinal end of the veneer is milled into the tooth-profile lengthening joint with the length of more than 3cm. Then it is
subject to finger-joint lengthening in the finger-joint machine. The joint adopts the joint lining cloth
that the joint width is larger than the tooth-profile length, and the length is 0.5-2cm larger than the
width of non-woven fabric. After coating the mixed adhesive with white latex as the main agent, the continuous lengthening of the veneer can be achieved under the pressure of 0.1-0.3MPa,
temperature of 130°C and time of 20-30s; d) The tooth-profile lengthening joint may adopts
one-layer single-sided joint sheet sealing, one-layer double-sided joint sheet sealing or two-layer
double-sided joint sheet sealing or multi-layer double-sided joint sheet sealing; e) The continuous longitudinal veneer is rolled with a scroll greater than the minimum radius of curvature into the
veneer volume.
3. Step 2) The dividing scale on the width of the veneer volume adopts the dividing scale
machine to divide the veneer volume at a certain width to form the veneer volume with the width of
3.0~50.0cm. The veneer sheet is bent and wound to the side without the patch, and the end is fixed with double-sided adhesive or hot melt adhesive, and the most inner layer of the veneer
automatically becomes the core axis of the veneer sheet, eliminating the paper pipe or other mandrel
need for rolling.
4. Step 3), The veneer sheet is subject to softening balance treatment, namely the pre-treatment
of the veneer sheet before winding, which is to send the veneer volume into the humidifying and tempering box or device within 2-24 hours before winding to carry out shape memory and stress relief treatment, and the balance moister is 80-95%, and the fogging agent is used at the same time.
The fogging agent is a kind of low concentration solvent that can be atomized and is surface active 2 and conforming to the solvent of glue. The dosage is 50-200g/m
. 5. Step 4) The epoxy resin, non-saturated polyester, phenolic resin, urea-formaldehyde resin,
melamine, polyurethane, white latex and other resins that can be bonded with wood are applied as
adhesives, and the adhesion of the above adhesives with the wood should refer to the cold curing or heat curing characteristics of the adhesives. The time of humidifying and tempering in step 3) is
adjusted to be 1/5-1/3 shorter of the time of cold curing adhesive.
6. Step 4) The winding angle is calculated from the inner diameter of the composite veneer
sheet subject to humidifying and tempering. It is wound on the core membrane with the film
remover or film adhesive, and after the starting point of one end is fixed, the gelling, dipping or
gumming begins. The rubber roller or extruding roller is pressed on the core film to extrude the excess adhesive to realize the quantitative control of the adhesive. At the same time, the core film
rotates while goes forward, and when it reaches the other end of the core film, the core film rotates
backward and continuously winds, which automatically forms the symmetrical reverse of the
winding angle, so that when the angle crossing between the layers of the composite veneer sheet is wound to specified number of layers, the end is fixed at power off; The winding angle at winding
generally adopts multiple intersecting of 10-30°, 45-600, and 0-5°. The winding speed is
2.5m/min-15m/min, the thickness of the winding wall is 5.0-35.0mm, and the diameter > 300mm.
7. Step 5) When winding with cold-pressed adhesive, the gelation time of cold-pressed
adhesive shall be 1.2-1.3 times as long as the winding time of the wood pipe, and the protective film shall be coated on the extruding roller or the glue roller to avoid early curing; When the heat-curing
adhesive, such as phenolic resin or urea resin modified phenolic resin, is applied, the winding
heating may be carried out at the same time to promote the slow discharge of moister, and increase the initial viscosity between the winding layers. The heating temperature is 40-60°C. The heating
applies radiation heating, using heating pipe or heating lamp irradiation.
8. Step 6) The wood winding pipe embryo is dried in the drying room until the adhesive is
completely cured, the temperature of the cold curing adhesive is not more than 40°C and the time is
more than 24 hours; The heat curing adhesive is applied with the drying temperature of 10°C of the curing temperature of the adhesive. After the curing temperature is reached, the curing time is 8-20min/mm of wall thickness, and the heating rate is 5-10°C/min when drying and curing. After curing, the cooling rate is 5-10°C/min. In order to prevent excessively fast releasing of moister heat stress in direct contact with air, cut, sanding, milling and other processing are carried out 24-48 hours after cooling to room temperature.
9. Step 7) The inner surface of the cured wood winding pipe is coated with the non-saturated polyester or other waterproof resin after being treated on the inner and outer wall surface, and the
outer layer is coated with the same resin or rubber modified phenolic resin, leaching enamel, epoxy
resin and other aging-resistant resins to form the waterproof and anti-aging functional interface to
make the wood winding composite pipe into the hydraulic pipe or other special-purpose pipe that can carry out hydraulic transportation.
Figure 1 Lengthening method of the veneer sheet: A-finger joint without sealing sticker
Figure 2 Lengthening method of the veneer sheet: B-finger joint with one-layer double-sided
sealing sticker
Figure 3 Lengthening method of the veneer sheet: C-finger joint with single-side reinforced sealing sticker
Figure 4 Lengthening method of the veneer sheet: D-finger joint with double-sided reinforced
sealing sticker
Figure 5 Average tensile strength of 12 groups of veneer sheet
Figure 6 Maximum tensile force of 12 groups of veneer sheet
Figure 7 Maximum displacement of 12 groups of veneer sheet
DESCRIPTION OF THE INVENTION 1
(I) Influence of the lengthening method of veneer sheet and its treatment on the tensile properties of the veneer sheet
1 Test material and method
1.1 Test material
The size specification of the poplar veneer in this test was 1220x2440x1.0mm. It was
purchased from Linyi, Shandong Province that was back sticked in the factory with the non-woven
fabric and cut into 10mmx100 composite veneer sheets. The moister content of the veneer is 8-12%.
Phenolic resin, with solid content of 40%, was from Taier Chemical (Nanjing) Co., Ltd. The finger
joint adhesive, starch modified urea-formaldehyde resin, had the viscosity of 7000mpa-s with the solid content of 35% purchased from the construction material market; Sealing strip: Market purchase from the construction material market followed by self-cutting.
1.2 Design and lengthening of the veneer sheet joint
The veneer sheet is lengthened in the longitudinal direction according to the following four types ofjoints. The mode of the joint is as follows:
Figure 1 Lengthening method of the veneer sheet: A-finger joint without sealing sticker
Figure 2 Lengthening method of the veneer sheet: B-finger joint with one-layer double-sided
sealing sticker
Figure 3 Lengthening method of the veneer sheet: C-finger joint with single-side reinforced
sealing sticker
Figure 4 Lengthening method of the veneer sheet: D-finger joint with double-sided reinforced
sealing sticker
Fast curing finger joint adhesive was applied on the finger joint interface, then put on the press machine for pressure curing with the time of 15s, the pressure of1.iMPa, and the temperature of 50°C
to complete the lengthening. The back-sticking of the joint was required, namely when the joint was
pressed, add a fast sealing strip, and form the joint reinforcement together with the tooth joint glue.
The one-sided sealing was to add a sealing strip at one side, the two-sided sealing was to add a sealing strip at two sides, and the double-sided reinforced sealing sticker was to add two sealing strips at both two sides. The sealing was with width of 40 3mm, and the length was the same as the width of the veneer sheet.
1.3 Preparation and test of the veneer strip tensile specimen
1.3.1 Preparation of the veneer strip tensile specimen
1. The specimen tested for the tensile strength was prepared according to the standard
dimensions in GB/T 1447-2005 Test Methodfor Tensile Propertiesof FiberReinforced Plastics. The
joints were located at the center of the tensile specimen. In order to provide the basic technological
data for the evaluation of the property variance of the veneer sheet in winding for the wood pipeline winding, this study investigated the tensile performance of veneer sheet joint in dry state, wet state
and impregnation state after lengthening. Four groups of joint were treated with control group
(air-dried), wet and impregnation processing, and each group was treated with 5 repeated samples. The control group was the air-dried specimen with the balance of the veneer at the temperature of
°C and the moister of 50-60%; The wet group was treated in the constant moister constant
temperature box at 85% moister and 25°C for 4 h. The moister content of the specimen was increased. After the veneer was softened, it was taken out for tensile test. The impregnation group was treated by diluting phenolic adhesive with the solid content of 40% into the phenolic
impregnation solution with the solid content of 30%. The veneer was impregnated in the adhesive
solution for 4h. Tensile properties were tested after it was taken out, drained and standing for 30min.
The number of each joint and processing group is shown. The design of the experiment is shown in Table 1.
Impregnation Group Control group-1 Wet group-2 group-3
A-finger joint without sealing Al A2 A3
sticker
B-finger joint with
one-layer BI B2 B3 double-sided
sealing sticker
C- finger joint
with single-side C1 C2 C3 reinforced sealing
sticker
D- finger joint
with double-sided D1 D2 D3 reinforced sealing
sticker
1.3.2 Tensile test of the veneer sheet
The tensile strength was tested in accordance with GB/T1447-2005 Test Methodfor Tensile
Properties of Fiber Reinforced Plastics. First of all, two lines were marked with the spacing of
(40.0 0.5) mm from the center position of the specimen to the two sides. The specimen was
mounted along the edge of the fixture at the position of the marked standard line, on the upper and
lower fixture of the universal mechanical testing machine, so that the tensile force could be
uniformly distributed on the cross section of the specimen. The loading speed waslmm/min when
the tensile strength was measured, and the tensile direction was along the grain, and the universal
mechanical testing machine was started. A total of 12 groups of specimens were tested, and 5
samples were repeated in each group.
2 Experimental results and analysis
The average tensile strength, maximum tensile force and maximum displacement of 12 groups
of veneer sheet joint tensile tests are shown in Figure 5, Figure 6, and Figure 7. As shown in Figure
, among the 4 lengthening methods, the joint tensile force of the composite veneer sheet increased
greatly from A to the end treatment group of D, and the tensile force increased. The average tensile strength was the best in group B, indicating that group B was the best in four types of joints.
After wet treatment and impregnation treatment, the moister content increased, the maximum
tensile strength was lower than that of the treatment group after wetting and impregnation, and the maximum moister tensile strength decreased significantly to about 1/3 of the dry control group,
while the impregnation group decreased slightly less, and retained more mechanical strength than that of the wet treatment. The tensile deformation was both increased from the maximum
displacement of the two processing, which made the sheet soft and easy to be wound. Therefore, it
was necessary for the composite veneer sheet to be pre-softened for winding. After treatment of
group A, the tensile property of the joint was obviously weaker than that of other groups, indicating
that the strength and safety of the joint form of group A were low, the composite veneer sheet was easy to be broken in winding, and among the groups B, C, and D, the tensile force of D was large,
the flexibility was good, B and C were second. It shall be noted that the effect of the double-sided
single layer was not obvious, so the strength of the sealing joint on the side with the composite layer
was greater. The tensile force is the pre-tension in the winding of composite veneer sheet. The tensile force needs to be greater than the tension to cause non-breaking and continuous winding of
the veneer sheet. The tensile device is the transverse resistance caused by the continuous angle
change with ordinary tensioning angle between 15-60°. The diameter of tension roller more than
1.5-20 times of the curvature radius of the veneer sheet can give the non-flexible composite veneer sheet a certain tension and at the same time can also move forward without breaking. Therefore, the
tensile force should be larger than that of COS150 -COS60 0 of the composite veneer sheet in
winding state, which is about 0.5-0.9. As can be seen from Figure 5, the maximum tensile force of A2, C2 and D2 groups shows the distribution less than 35N. After the calculation, it is only
17.5-31.5, and some are even lower. It is necessary to consider that the softness of the joint
increases in this kind of finger joint method with wet processing, but the strength loss of the joint is
too great. If you insist on this kind of wet treatment, you should consider properly reducing the humidifying and tempering impregnation time or adding gridding cloth or other lining cloth in
winding to drive the composite veneer sheet synchronously, and disconnection of the joint should
be avoided. The results showed that the B3 was the best, the tensile force was concentrated and
larger, and that A3, C3 and D3 had minimum value shows that the joint had been broken and could be ignored, while the concentration distribution area was better than the wet group. However, it should be noted that the impregnation group did not increase the tensile properties of the joint because of the two-layer strengthening. It may be difficult to infiltrate the joint with the two-layer strengthening adhesive, but only the water entered, leading to the moister-based softening, rather than the glue strengthening. Therefore, the adhesive impregnation process was based on the joint one-layer sticker.
Dry composite veneer sheet has large tensile force, good strength, but low deformation, great brittleness, and good rigidity, and is not easy to wind. It is suitable for use in the pipe with larger
curvature or diameter, but its flexibility is not good, whether the interface layer can be tightly
wound relies on the initial viscosity of adhesives and cold adhesive force, this wet bonding
preliminary molding technology needs to be further studied. Among the 4 ways of lengthening, the two-layer double-sided adhesive has the largest strength, followed by one-layer double-sided
adhesive. The sealing sticker strengthening at dry state has the obvious function. The performance
of the two approaches is different.
3 Conclusion
Among the four lengthening methods, the tensile force of the interface of the sealing veneer
sheet after composite is obviously increased, and the tensile strength of the B group is the best; The
deformation of the veneer increases after wetting and impregnation treatment, the flexibility is good, and the tensile force decreases obviously, but the performance of the joint form on the tensile force
is not the same as that of the dry state. The joint of group B is best among the impregnation group,
group D is not the best, which may be that the large molecular glue is difficult to infiltrate, while
moister first wet the joint site, resulting in lengthening part failure. In the winding of wood pipe, considering the angle of actually winding tension tightening device, attention should be paid to the
treatment of wet group to prevent the joint from disconnecting, while the safety of impregnation
group is much better.
(II) The wood winding composite pipe glued with phenolic resin with fast-growing poplar wood as the raw material
A new type of wood winding composite pipe is wound by taking the longitudinal lengthened
fast-growing poplar veneer sheet with the thickness of 1.00.lmm and the width of 10.0lmm as the main component, which consists of the following technological steps:
1) The poplar veneer with the thickness of 1.00.lmm and the width of 1.22x2.22mm was
treated with equalization of heat and moister at 85% moister and temperature of 25-35°C to make the veneer easy to be transported without cracking, eliminating the growth stress. The non-woven
fabric was impregnated with starch-modified urea-formaldehyde resin and the impregnation content
was 100-120g/m2 . The veneer and the impregnated non-woven fabric were quickly bonded in respiration hot-pressing to form the composite veneer. The hot pressing pressure, temperature and
total time was 20s;
2) The composite veneer with non-woven cloth poplar was cut along the direction of width to
form the veneer sheet with the width of 10.0+1mm, and the end of the composite veneer was
subject to tooth-profile processing with the length of the tooth-profile lengthening port of
3.00.5cm to realize the fingerjoint lengthening of the composite veneer;
3) Fast curing white latex was applied. The white latex was coated on the joint of the composite veneer sheet, and the sealing lining was added at the joint of the composite veneer,
namely the sealing sticker was subject to reinforced tooth-profile bonding. Figure 2 shows the
load-displacement curves of the four basic types of composite veneer sheet lengthening modes of
group A - finger joint without sealing sticker, group B - one-layer double-sided sealing sticker, group C - one-layer double-sided sealing sticker and group D - two-layer double-sided sealing
sticker, as well as the load-displacement curve of the joint after humidifying and tempering or
impregnation. Figure 2 shows that the impregnation treatment can increase the displacement of the
joint, ensure the ductility and flexibility of the veneer, and at the same time, can keep the larger tensile force, while the wetting can increase the tensile displacement, the tensile load can be
reduced to about 1/3. Therefore, the impregnation treatment can keep the strength and ductility of
the joint simultaneously. If the composite veneer sheet is wetted by humidifying and tempering, it should be noted that the processing technique can not make the tensile force of the composite
veneer sheet lower than 1/3 of the joint without processing to avoid breaking the veneer sheet at the
joint due to tensile tension during winding. In this case, the one-layer double-sided joint sticker as
shown in Figure 2 is used to achieve joint lengthening to form the continuous poplar composite veneer sheet.
4) The poplar veneer sheet was subject to width scaling on the dividing scale machine. The
non-straightness in the length direction of the poplar veneer sheet was less than 0.1%, and the width scale of the composite veneer was 10±0.2mm. The composite veneer sheet was bent and rolled to
the side without lining. The end was fixed with double-sided adhesive or hot melt adhesive, and the
innermost circle of the veneer sheet turned into the core axis to make it rolled into the composite veneer volume;
5) The poplar composite veneer volume was put into the humidifying and tempering
equipment with moister above 80%, and was softened before winding. Each volume of veneer sheet
shall be sprayed with certain fogging water, the tempering time was 1.5h before winding, the
phenolic resin was used as adhesive, and the tempered composite veneer sheet was impregnated and fixed on the core film side of the wood pipe winding equipment with diameter of 300mm. The angle
between the first layer veneer sheet and the vertical line of the core axis was 15°, the second layer
was the reverse 15°, the 3rd layer was 450, the 4th layer was reverse 450, the 5th layer was 0-50, the
6th layer was reverse 450, the 7th layer was 450, the 8th layer was reverse 150, and the 9th layer was
150. the core axis rotated and repeated with the winding speed of 5 m/min, and it was wound into
the winding pipe embryo with the wall thickness of 10cm;
6) The poplar winding pipe embryo material and core film were dried in the drying room with
the curing temperature of 135-140°C, the heating rate of 5°C/min, and the curing time of 8 min/mm.
After the adhesive was completely cured, then the cooling rate was 5°C/min, and after the temperature was below 60°C, it was taken out of the drying room to form the poplar winding
composite pipe;
7) The inner and outer walls of the poplar winding composite pipe were subject to surface
coarse sand processing to homogenize the surface roughness. The phenolic primer was applied for
shower coating or impregnation with the coating thickness of 100-300um. The coating thickness of the outer wall could be increased to 300-1000um. The coating was dried and cured at about 60°C to
form the water-conveying poplar composite pipe with waterproof, anti-rust and anti-corrosion
coatings on the inner and outer walls. It could be used as the pipeline of diversion of rain and
sewage water, and the performance of the pipeline is shown in Table 1.
Table 1 Basic performance of poplar-based composite pipe
Pipeline diameter 300 Wall thickness T/mm 10 D/mm
Density g/cm3 0.7-0.85 Electrical insulation Insulation
Length 4m, 6m, 1 or customized Flam resistance B1 level
Anti-radial Internal water pressure of Ring stiffness KN/m 25-38 vibration 0.1-0.25MPa, no leakage
(III) The wood-based pipeline glued with epoxy adhesive with eucalyptus as the raw material
A new type of wood winding composite pipe is wound by taking the longitudinal lengthened
fast-growing eucalyptus veneer sheet with the thickness of 1.0±0.1mm and the width of 10.01mm
as the main component, which consists of the following technological steps:
1) The eucalyptus veneer with the thickness of 1.0±0.1mm and the width of 1.22x2.22mm was treated with equalization of heat and moister at 85% moister and temperature of 25-35°C to make
the veneer easy to be transported without cracking, eliminating the growth stress and smoothing.
The gridding cloth or the gauze was impregnated with starch-modified urea-fonnaldehyde resin and
the impregnation content was 100-120g/m 2. The veneer and the impregnated gridding cloth or the gauze were quickly bonded in respiration hot-pressing to form the composite veneer. The hot
pressing pressure, temperature and total time was 20s;
2) The composite veneer with gridding cloth or the gauze eucalyptus was cut along the
direction of width to form the veneer sheet with the width of 10.0+1mm, and the end of the
composite veneer was subject to tooth-profile processing with the length of the tooth-profile lengthening port of 3.0±0.5cm to realize the finger joint lengthening of the composite veneer;
3) Fast curing white latex was applied. The white latex was coated on the joint of the
composite veneer sheet. The D-finger joint two-double sided reinforced sealing sticker as shown in
Figure 2 was adopted for lengthening to form the continuous eucalyptus composite veneer sheet;
4) The eucalyptus veneer sheet was subject to width scaling on the dividing scale machine. The non-straightness in the length direction of the eucalyptus veneer sheet was less than 0.1%, and the width scale of the composite veneer was 10±0.2mm. The composite veneer sheet was bent and
rolled to the side without lining. The end was fixed with double-sided adhesive or hot melt adhesive,
and the innermost circle of the veneer sheet turned into the core axis to make it rolled into the composite veneer volume;
5) The eucalyptus composite veneer volume was subject to softening process before winding. Each volume of veneer sheet shall be sprayed with certain fogging banana oil, the tempering time
was 1.5h before winding, the two groups of epoxy resin were used as adhesive, and the tempered
composite veneer sheet was impregnated and fixed on the core film side of the wood pipe winding
equipment with diameter of 300mm. The angle between the first layer veneer sheet and the vertical line of the core axis was 15°, the second layer was the reverse 15°, the 3rd layer was 450, the 4th
layer was reverse 15°, the 5th layer was 0-5°, the 6th layer was reverse 15°, the 7th layer was 150,
the 8th layer was reverse 150, and the 9th layer was 15°. the core axis rotated and repeated with the
winding speed of 8 m/min, and it was wound into the winding pipe embryo with the wall thickness of 10cm;
6) The winding pipe embryo material and core film were rotated and cold cured with the
curing time of 24-48h until the adhesive was cured completely to make eucalyptus winding
composite pipe.
7) The inner and outer walls of the winding composite pipe were subject to soot blowing of
surface coarse sand and other cleaning process. Then the epoxy paint was applied for shower coating or impregnation with the coating thickness of 100-300um. The coating thickness of the
outer wall could be increased to 300-1000um. The coating was dried and cured at above 60°C or
according to the components of the epoxy anti-rust paint to surfer high temperature curing to form the water-conveying poplar composite pipe with waterproof, anti-rust and anti-corrosion coatings
on the inner and outer walls. It could be used as the pipeline of diversion of rain and sewage water,
and the performance of the pipeline is shown in Table 2.
Table 2 Basic performance of eucalyptus-based composite pipe for water conveyance
Pipeline diameter 300 Wall thickness T/mm 10 D/mm
Density g/cm3 0.7-0.85 Electrical insulation Insulation
Length 4 m, 6 m, 1 or customized Flam resistance B1 level
Anti-radial Internal water pressure of Ring stiffness KN/m 25-38 vibration 0.1-0.25MPa, no leakage
Claims (9)
1. A new type of wood winding composite pipe and its preparation method, which is characterized by taking the fast-growing wood veneer sheet of longitudinal lengthening with thickness of 0.5~3.0mm and width of 10.0~500.0mm 1m as the main component that is subject
to winding to a new type of wood winding composite pipe, mainly including the following process:
1) The fast-growing normalized veneer with thickness of 0.5-3.0mm is treated with
equalization of heat and moister, and sizing is applied with the non-woven or other lining materials,
and the veneer is combined with non-woven cloth or other lining materials to form the composite veneer;
2) The composite veneer with non-woven cloth or lining material is cut along the direction of
width to form the veneer sheet with the width of 30.0~500.0mm 1mm, and the end of the
composite veneer is subject to tooth-profile processing to realize the finger joint lengthening of the
composite veneer;
3) Fast curing wood adhesive is applied, such as white latex, urea-formaldehyde resin, polyvinyl alcohol resin and so on. Then the veneer and lining cloth are used for the tooth-profile
bonding at the joint, and then the other side applies the same interfacing of lining bonding to form
the continuous composite veneer sheet;
4) The composite veneer sheet is subject to scale fixing of width on the gauge machine to
reduce or eliminate the non-straightness in the length direction caused by the skew joint in the
process of the composite veneer sheet lengthening. After the veneer sheet is gauged, the non-straightness in the length direction of the composite veneer sheet is less than 0.1%, and then the
composite veneer sheet is rolled into the composite veneer volume;
5) Using epoxy resin, non-saturated polyesters, phenolic resin, urea-formaldehyde resin,
melamine, white latex and other resins which can be bonded with wood as adhesives, the composite
veneer sheet is subject to gum dipping or is coated with glue and then wound onto the core film of the wood pipe winding equipment to form the wood winding pipe embryo;
6) The wood winding pipe embryo and core film are dried in the drying room until the
adhesive is completely cured to form the wood winding composite pipe;
7) According to the functional requirements of the application field, the wood composite
winding pipe can be used directly after being polished or edge banding, or the inner and outer walls of the composite pipe can be coated with the functional protective layer to improve the protective
performance to work as the pipe with high protective performance.
2. A new type of wood winding composite pipe and its preparation method, as described in
Claim 1, is characterized in that: step 1) The process of the veneer volume made of fast-growing wood veneer includes the following steps: a) The veneer with thickness of 0.5-3.0mm is cut into the
normalized veneer with the size of 1.22x2.4m or 0.80x2.76m, and the veneer moister content is
-18%, b) The non-woven cloth or other cloth is impregnated, then the non-woven cloth or other
lining cloth subject to impregnation is combined with the veneer, adopting the breathing rapid hot-pressing process, venting once every 30-50s, with the hot-pressing temperature of 100-130°C.
After 3-5 times of repetition the veneer is formed, and the veneer flexible back-sticking process is
completed; c) The veneer subject to back-sticking is cut with the required width, then the
longitudinal end of the veneer is milled into the tooth-profile lengthening joint with the length of more than 3cm. Then it is subject to finger-joint lengthening in the finger-joint machine. The joint
adopts the joint lining cloth that the joint width is larger than the tooth-profile length, and the length
is 0.5-2cm larger than the width of non-woven fabric. After coating the mixed adhesive with white
latex as the main agent, the continuous lengthening of the veneer can be achieved under the pressure of 0.1-0.3MPa, temperature of 130°C and time of 20-30s; d) The tooth-profile lengthening
joint may adopts one-layer single-sided joint sheet sealing, one-layer double-sided joint sheet
sealing or two-layer double-sided joint sheet sealing or multi-layer double-sided joint sheet sealing; e) The continuous longitudinal veneer is rolled with a scroll greater than the minimum radius of
curvature into the veneer volume.
3. A new type of wood winding composite pipe and its preparation method, as described in
Claim 1, is characterized in that: step 2) The dividing scale on the width of the veneer volume
adopts the dividing scale machine to divide the veneer volume at a certain width to form the veneer volume with the width of 1.0~50.0cm. The veneer sheet is bent and wound to the side without the
patch, and the end is fixed with double-sided adhesive or hot melt adhesive, and the innermost layer
of the veneer automatically becomes the core axis of the veneer sheet, eliminating the paper pipe or other mandrel need for rolling.
4. A new type of wood winding composite pipe and its preparation method, as described in
Claim 1, is characterized in that: step 3), The veneer sheet is subject to softening balance treatment, namely the pre-treatment of the veneer sheet before winding, which is to send the veneer volume
into the humidifying and tempering box or device within 2-24 hours before winding to carry out
shape memory and stress relief treatment, and the balance moister is 80-95%, and the fogging agent is used at the same time. The fogging agent is a kind of low concentration solvent that can be 2 atomized and is surface active and conforming to the solvent of glue. The dosage is 50-200g/m
5. A new type of wood winding composite pipe and its preparation method, as described in Claim 1, is characterized in that: step 4) The epoxy resin, non-saturated polyester, phenolic resin,
urea-formaldehyde resin, melamine, polyurethane, white latex and other resins that can be bonded
with wood are applied as adhesives, and the adhesion of the above adhesives with the wood should refer to the cold curing or heat curing characteristics of the adhesives. The time of humidifying and
tempering in step 3) is adjusted to be 1/5-1/3 shorter of the time of cold curing adhesive.
6. A new type of wood winding composite pipe and its preparation method, as described in
Claim 1, is characterized in that: step 4) The winding angle is calculated from the inner diameter of
the composite veneer sheet subject to humidifying and tempering. It is wound on the core membrane with the film remover or film adhesive, and after the starting point of one end is fixed,
the gelling, dipping or gumming begins. The rubber roller or extruding roller is pressed on the core
film to extrude the excess adhesive to realize the quantitative control of the adhesive. At the same
time, the core film rotates while goes forward, and when it reaches the other end of the core film, the core film rotates backward and continuously winds, which automatically forms the symmetrical
reverse of the winding angle, so that when the angle crossing between the layers of the composite
veneer sheet is wound to specified number of layers, the end is fixed at power off; The winding angle at winding generally adopts multiple intersecting of 10-30°, 45-600, and 0-5°. The winding
speed is 2.5m/min-15m/min, the thickness of the winding wall is 5.0-35.0mm, and the diameter >
300mm.
7. A new type of wood winding composite pipe and its preparation method, as described in
Claim 1, is characterized in that: step 5) When winding with cold-pressed adhesive, the gelation time of cold-pressed adhesive shall be 1.2-1.3 times as long as the winding time of the wood pipe, and the protective film shall be coated on the extruding roller or the glue roller to avoid early curing; When the heat-curing adhesive, such as phenolic resin or urea resin modified phenolic resin, is applied, the winding heating may be carried out at the same time to promote the slow discharge of moister, and increase the initial viscosity between the winding layers. The heating temperature is -60°C. The heating applies radiation heating, using heating pipe or heating lamp irradiation.
8. A new type of wood winding composite pipe and its preparation method, as described in
Claim 1, is characterized in that: step 6) The wood winding pipe embryo is dried in the drying room
until the adhesive is completely cured, the temperature of the cold curing adhesive is not more than
°C and the time is more than 24 hours; The heat curing adhesive is applied with the drying temperature of 10°C of the curing temperature of the adhesive. After the curing temperature is
reached, the curing time is 8-20min/mm of wall thickness, and the heating rate is 5-10°C/min when
drying and curing. After curing, the cooling rate is 5-10°C/min. In order to prevent excessively fast
releasing of moister heat stress in direct contact with air, cut, sanding, milling and other processing are carried out 24-48 hours after cooling to room temperature.
9. A new type of wood winding composite pipe and its preparation method, as described in Claim 1, is characterized in that: step 7) The inner surface of the cured wood winding pipe is coated
with the non-saturated polyester or other waterproof resin after being treated on the inner and outer
wall surface, and the outer layer is coated with the same resin or rubber modified phenolic resin, leaching enamel, epoxy resin and other aging-resistant resins to form the waterproof and anti-aging
functional interface to make the wood winding composite pipe into the hydraulic pipe or other
special-purpose pipe that can carry out hydraulic transportation.
-1/3- 2020103183
Figure 1
Figure 2
Figure 3
Average tensile strength -2/3-
Number
Figure 5 Figure 4
Maximum displacement/mm Maximum tensile force/N -3/3-
Figure 7 Figure 6
Number Number
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020103183A AU2020103183A4 (en) | 2020-11-02 | 2020-11-02 | A New Type of Wood Winding Pipe and Its Production Method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020103183A AU2020103183A4 (en) | 2020-11-02 | 2020-11-02 | A New Type of Wood Winding Pipe and Its Production Method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2020103183A4 true AU2020103183A4 (en) | 2021-01-14 |
Family
ID=74103448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2020103183A Ceased AU2020103183A4 (en) | 2020-11-02 | 2020-11-02 | A New Type of Wood Winding Pipe and Its Production Method |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2020103183A4 (en) |
-
2020
- 2020-11-02 AU AU2020103183A patent/AU2020103183A4/en not_active Ceased
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