Straw-wound composite pipe and preparation method thereof

A composite pipe and straw technology, applied in the field of composite pipes, can solve the problems of narrow application range, complex process, and lack of versatility of square pipes, and achieve the effects of improved production and processing efficiency, extensive resources, and light weight

Active Publication Date: 2016-04-27
ZHEJIANG XINZHOU BAMBOO BASED COMPOSITES TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned prior art first uses straw to make composite straw lightweight partition boards, and then splices them int

Method used

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  • Straw-wound composite pipe and preparation method thereof
  • Straw-wound composite pipe and preparation method thereof

Examples

Experimental program
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Effect test

Example Embodiment

[0028] The method for preparing the above-mentioned straw-wound composite pipe in a specific embodiment of the present invention includes the following steps:

[0029] Straw pretreatment: remove the remaining part of the straw except the stem, and cut the straw into the same length after drying;

[0030] Preparation of the inner lining: fabric and adhesive are used to make an anti-corrosion and anti-seepage inner lining on the straight pipe mold;

[0031] Preparation of the straw structure layer: Wrap the grid cloth on the inner lining layer, and set the hopper above the grid cloth to output the straw stems in the same direction, so that the straw stems are laid tightly in parallel with the grid cloth to the mold. On the grid cloth, its laying direction is the same as the conveying direction of the grid cloth, or at a certain angle with the conveying direction of the grid cloth, and then the laid straw stems are pressed into a sheet by a pressing machine, and then vertically through ...

Example Embodiment

[0036] Example 1

[0037] This embodiment takes the production of a straw-wound composite pipe with a nominal diameter of 200 mm as an example to specifically describe the preparation method of the straw-wound composite pipe of the present invention. The specific steps are as follows:

[0038] 1) Straw pretreatment:

[0039] Choose one or more of wheat, rice, corn, sorghum stalks, remove the rest of the stalks except the stems, and dry the stalks to obtain a straw stalk with a moisture content of 10%, which is then cut into the same length .

[0040] 2) Preparation of inner liner:

[0041] A layer of 0.04mm thick polyester film is covered on a polished straight tube mold with an outer diameter of 200mm. The polyester film is used as a release layer, and the adhesive, wood fiber non-woven fabric and glass fiber knitted felt are used in the straight The inner lining layer 1 with a thickness of 1.5mm is made on the release layer of the pipe mold. The inner lining layer has the function o...

Example Embodiment

[0047] Example 2

[0048] This embodiment takes the production of a straw-bamboo-wound composite pipe with a nominal diameter of 400 mm as an example to specifically describe the preparation method of the straw-bamboo-wound composite pipe of the present invention. The specific steps are as follows:

[0049] 1) Straw pretreatment: same as Example 1;

[0050] 2) Preparation of the inner lining layer: same as Example 1, except that the outer diameter of the straight pipe mold is 400mm;

[0051] 3) Preparation of the first straw reinforcement layer 21: same as in Example 1, with a thickness of 6mm;

[0052] 4) Preparation of auxiliary reinforcement layer:

[0053] Use resin and inorganic mineral fillers or natural plant fillers to mix and stir to form a cement. Inorganic mineral fillers can be stone powder, mineral sand, etc., natural plant fillers can be selected from wood chips, wood powder, bamboo chips, bamboo powder, plant nutshell powder or There are several types, the filler mass rat...

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Abstract

The invention discloses a straw-wound composite pipe and a preparation method thereof. The composite pipe sequentially comprises a lining layer, a reinforcement layer and an outer protection layer from inside to outside in the pipe diameter direction, wherein the reinforcement layer comprises a plurality of straw layer formed by winding of straw stems. The method comprises the following steps: removing the other parts of straw except the stems, drying the stems and then cutting the stems in the same length; preparing the lining layers from fabric and an adhesive; conveying the straw stems in the same direction onto mesh fabric so that the straw stems are laid on the mesh fabric parallelly and densely, then compressing the laid straw stems into a sheet, next sewing the straw stems, dipping the sewn straw stems in gum in a gum dipping tank with conveying of the mesh fabric, the winding the straw stems on the lining layer, and solidifying the straw stems to obtain the reinforcement layer; and preparing the outer protection layer outside the straw structure layer. According to the invention, the straw is wound to form the straw-wound composite pipe which can be widely applied in the fields of agricultural irrigation, drainage, building ventilation and the like, is green and environment-friendly, has a light weight, is low in cost and fully utilizes idle resources.

Description

technical field [0001] The invention belongs to the field of composite pipes, and more specifically relates to a straw-wound composite pipe and a preparation method thereof. Background technique [0002] At present, traditional pipes such as cement pipes, polyvinyl chloride, polyethylene, polypropylene, glass steel pipes, and thin iron pipes are generally used in fields such as agricultural irrigation, drainage, and building ventilation that do not require high pressure on pipes. Cement pipes are low in cost, but heavy, and the pipe joints are easy to leak; PVC, polyethylene, and polypropylene pipes are light, smooth, and corrosion-resistant, but their raw materials are all petrochemical synthetic products, which consume a lot of valuable petroleum resources; glass fiber reinforced plastics Pipes and FRP sand pipes are corrosion-resistant and have low fluid resistance. However, the main raw material for the product is glass fiber with high energy consumption, and the resin i...

Claims

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Application Information

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IPC IPC(8): F16L9/14F16L57/02F16L58/10
CPCF16L9/14F16L57/02F16L58/1009F16L58/1072
Inventor 叶柃牛琳
Owner ZHEJIANG XINZHOU BAMBOO BASED COMPOSITES TECH
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