A kind of preparation method of wooden winding composite pipe

A composite pipe and wood technology, applied in the field of wood science, can solve the problems of high hardness, low winding efficiency, poor flexibility, etc.

Active Publication Date: 2022-05-24
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a method for preparing wood-wound composite pipes. The innovation of the present invention lies in overcoming the shortcomings of the existing wood-based pipe material structural part of the double-plywood, which has high hardness, low winding efficiency, and poor flexibility, and at the same time overcomes the shortcomings of different The interface separation of the structural interface layer is an insurmountable shortcoming, and the winding efficiency and product performance of the wood-based winding composite pipe are improved

Method used

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  • A kind of preparation method of wooden winding composite pipe
  • A kind of preparation method of wooden winding composite pipe
  • A kind of preparation method of wooden winding composite pipe

Examples

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preparation example Construction

[0038] like Figure 1-7 Said, the present invention discloses a preparation method of a wood winding composite pipe, comprising the following process steps:

[0039] S1. The normalized veneer of fast-growing material with a thickness of 0.5-3.0mm is subjected to moisture and heat balance treatment, the non-woven fabric or other lining material is sizing, and the veneer is pasted with the non-woven fabric or other lining material. Composite veneer;

[0040] S2. Cut the composite veneer with non-woven fabric or interlining material in the width direction to become a veneer belt with a width of 30.0-500.0mm±1mm, and the end of the composite veneer belt is processed into a tooth shape, so that Carry out finger-joining and lengthening of composite veneers;

[0041] S3. Use fast-curing wood adhesives, including but not limited to, white latex, urea-formaldehyde resin, polyvinyl alcohol resin, etc., and then veneer and lining cloth at the joint for tooth-shaped bonding, and then the...

Embodiment 1

[0056] Example 1: A phenolic resin-bonded wood winding composite pipe using fast-growing poplar as raw material.

[0057] Taking the fast-growing poplar veneer strip with a thickness of 1.0±0.1mm and a width of 10.0±1mm as the main constituent unit, it is wound into a wood-wound composite wood pipe, which mainly includes the following process steps:

[0058] 1) Treat the poplar veneer with a thickness of 1.0±0.1mm and a width of 1.22×2.22mm at a humidity of 85% and a temperature of 25-35°C to balance the humidity and heat, so that the veneer is easy to handle without cracking, eliminates the growth stress, and the non-woven fabric Impregnated with starch-modified urea-formaldehyde resin, the amount of dipping is 100-120g / m2, and the veneer and the non-woven fabric after dipping are quickly bonded to a composite veneer by breathing hot pressing, hot pressing pressure, temperature, total time is 20s;

[0059] 2) Cut the poplar composite veneer with non-woven fabrics in the widt...

Embodiment 2

[0067] Example 2: Wood-based pipes glued with epoxy adhesive using eucalyptus wood as raw material.

[0068] Taking a longitudinally extending fast-growing eucalyptus veneer tape with a thickness of 1.0±0.1mm and a width of 10.0±1mm as the main constituent unit, winding a wood-wound composite wood pipe mainly includes the following process steps:

[0069] 1) Treat the eucalyptus veneer with a thickness of 1.0±0.1mm and a width of 1.22×2.22mm at a humidity of 85% and a temperature of 25-35℃ to balance the humidity and heat, so that the veneer can be easily handled without cracking, eliminate the growth stress, level it, and The mesh cloth or gauze is impregnated with starch-modified urea-formaldehyde resin, the amount of impregnation is 100-120g / m 2 , the veneer and the dipped mesh or gauze are quickly bonded to a composite veneer by breathing hot pressing, and the hot pressing pressure, temperature, and total time are 20s;

[0070] 2) Cut the eucalyptus wood composite veneer ...

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Abstract

The invention discloses a method for manufacturing a wood-wound composite pipe. The process steps include the following steps: using a fast-growing wood veneer with a thickness of 0.5-3.0 mm to be reinforced with non-woven fabrics or other fibrous materials on the back, then finger-joining and adding different sealing stickers to strengthen the joints. The composite veneer belt made by long technology is the main constituent unit; the composite veneer belt is glued to a certain length and a wood composite pipe is formed by symmetrical and antisymmetric winding; the inner and outer walls of the wood composite pipe are waterproof and anti-aging protection, the invention A method for manufacturing a wood composite pipe is provided. The prepared pipe has excellent performance, good dimensional stability, excellent bonding strength, and good ring stiffness, which can meet the requirements of water pipeline materials and various industrial pipes. Environmentally friendly pipe manufacturing method.

Description

technical field [0001] The invention relates to a preparation method of a wood winding composite pipe mainly used for agricultural irrigation, water supply and drainage engineering and related water conveyance and heat preservation pipes, and belongs to the field of wood science and technology. Background technique [0002] With the rapid development of hydraulic transportation and pipeline transportation in my country, cement pipes, steel pipes, polyvinyl chloride pipes, and glass steel pipes commonly used in transportation pipelines are faced with large environmental temperature differences. Causes micro-cracks in the pipeline, causing water seepage and other problems. At the same time, with the increasing requirements of environmental protection, the high energy consumption, resource consumption and carbon emissions of the above-mentioned pipeline production such as cement pipes and steel pipes do not meet the requirements of energy saving and low carbon, resulting in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M3/00B27H1/00B27D1/04B27F1/16F16L9/16F16L57/02F16L58/04F16L59/02
CPCB27M3/00B27H1/00B27D1/04B27F1/16F16L9/16F16L57/02F16L58/04F16L59/02
Inventor 梅长彤关明杰孙丰文
Owner NANJING FORESTRY UNIV
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