Preparation method for wood wound composite pipe

A composite tube and winding tube technology, applied in the field of wood science, can solve the problems of poor flexibility, low winding efficiency, and high hardness of the two-ply board, and achieve the effects of improving protection performance, improving production efficiency, and enhancing overall performance

Active Publication Date: 2021-01-05
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation method for wood wound composite pipe
  • Preparation method for wood wound composite pipe
  • Preparation method for wood wound composite pipe

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preparation example Construction

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

[0039] S1. Perform moisture and heat balance treatment on the standardized veneer of fast-growing wood with a thickness of 0.5-3.0mm, sizing the non-woven fabric or other interlining materials, and compound the veneer with non-woven fabric or other interlining materials to form a composite veneer;

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

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

Embodiment 1

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

[0057] Taking the longitudinally connected fast-growing poplar veneer belt 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 wooden winding composite wood pipe, which mainly includes the following process steps:

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

[0059] 2) Cut the poplar composite veneer with non-woven fabric ...

Embodiment 2

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

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

[0069] 1) The eucalyptus veneer with a thickness of 1.0±0.1mm and a format of 1.22×2.22mm is treated with humidity and heat balance at a humidity of 85% and a temperature of 25-35°C, so that the veneer is easy to carry without cracking, eliminates growth stress, and is leveled. Mesh cloth or gauze impregnated with starch-modified urea-formaldehyde resin, the amount of impregnation is 100-120g / m 2 , the veneer and the dipped mesh cloth or gauze are quickly bonded into a composite veneer by breathing hot pressing, and the hot pressing pressure, temperature, and total time are 20s;

[0070] 2) Cut the eucalyptus composite veneer with mesh clo...

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Abstract

The invention discloses a preparation method for a wood wound composite pipe. The preparation method comprises the following process steps that a fast-growing wood veneer with the thickness of 0.5-3.0mm is enhanced by adopting a back-pasted non-woven fabric or other fiber materials, and then a composite veneer strip manufactured by finger joint and different sealing paste strengthening and lengthening technologies is taken as a main constituent unit; the composite veneer strip is subjected to sizing, glue applying and symmetrical and antisymmetrical winding treatment to form the wood composite pipe; and waterproof anti-aging protection is carried out on the inner wall and the outer wall of the wood composite pipe. According to the preparation method for the wood composite pipe, the manufactured pipe is excellent in performance, good in size stability, excellent in bonding strength and good in ring stiffness, and can meet the using requirements of materials for water conveying pipelines and various industrial pipes, and the preparation method is a novel environment-friendly pipe preparation method.

Description

technical field [0001] The invention relates to a preparation method of a wooden winding composite pipe mainly used in agricultural irrigation, water supply and drainage projects and related water transmission and heat preservation pipelines, and belongs to the field of wood science and technology. Background technique [0002] With the rapid development of hydraulic transportation and pipeline transportation projects 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. When used in cold regions, pipelines will have greater temperature difference stress. Cause micro-cracks in the pipeline, causing water seepage and other problems. At the same time, as the requirements for environmental protection are getting higher and higher, the problems of high energy consumption, resource consumption and large carbon emissions in the production of ceme...

Claims

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Application Information

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Patent Type & Authority Applications(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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