CA2993899C – June 4, 2019 – STRAW AND BAMBOO WOVEN COMPOSITE PIPE AND MANUFACTURING METHOD THEREOF

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Inventors :

ZHU, XIN; NIU, LIN; YE, LING - 966-2, CHANGHONG EAST STREET DEQING ECONOMIC DEVELOPMENT ZONE HUZHOU 313299

Owner :

F16L9 / 14

Application Number :

CA2993899

Document Number :

CA2993899C

Priority Date :

February 2, 2016

Filing Date :

December 13, 2016

Date of Grant/ Publication :

June 4, 2019

Class :

ZHEJIANG XINZHOU BAMBOO-BASED COMPOSITES TECHNOLOGY CO., LTD.

Abstract

[0001] A straw and bamboo woven composite pipe and a manufacturing method thereof. [0002] The composite pipe comprises, along a pipe radial direction and from the center outward: a liner layer (1), a reinforced layer, and an outer protective layer (4). The reinforced layer comprises bamboo fiber reinforced layer (2) and straw reinforced layer (3). [0003] The method comprises the following steps: manufacturing using a bamboo material to acquire a bamboo strip roll; cutting, along a stem direction, the stem part of a straw into straw strips, degumming and drying the same, and arranging the straw strips in parallel to each other to manufacture and acquire a straw roll; producing, using a fabric and an adhesive, the lining layer (1); unrolling the bamboo strip roll, then weaving the same into the lining layer (1), and then simultaneously feeding an adhesive to manufacture the bamboo fiber reinforced layer (2); unrolling the straw roll, then weaving the same into the bamboo fiber reinforced layer (2), and simultaneously feeding the adhesive to manufacture the straw reinforced layer (3); and spray coating on the straw reinforced layer (3) using an antiseptic and waterproof material to form the outer protective layer (4). The composite pipe comprises straws, and can significantly increase production and processing efficiency, reducing production costs, decreasing the weight of the pipe materials, end facilitating transportation thereof.

Claim(s)

1. A composite pipe, comprising, successively, from the inside out in a radial direction of the composite pipe: an inner liner layer; a reinforced layer; and an outer protective layer; wherein: the reinforced layer comprises a bamboo fiber reinforced layer and a straw reinforced layer; the bamboo fiber reinforced layer comprises a plurality of bamboo strip layers, each bamboo strip layer comprising winding bamboo strips; and the straw reinforced layer comprises a plurality of straw layers, each straw layer comprising winding stems of straw.;
7. A method for manufacturing a composite pipe, the method comprising: cutting raw bamboo into bamboo chips; removing skins and piths of the bamboo chips, and slicing the resulting bamboo chips into bamboo strips; drying the bamboo strips; connecting the dried bamboo strips into a bamboo belt, and rolling the bamboo belt; providing straw and collecting stems thereof; drying the stems and cutting the stems in equal length; coating a fabric and an adhesive on a straight pipe mold to yield an inner liner layer; winding the bamboo belt on the inner liner layer, feeding an adhesive to the bamboo belt to coat the bamboo strips of the bamboo belt by the adhesive, and curing the bamboo belt to obtain a bamboo fiber reinforced layer; winding a grid cloth on the bamboo fiber reinforced layer; parallelly arranging the stems of the straw on the grid cloth; pressing and flattening the arranged stems of the straw, sewing the stems of the straw perpendicularly to an arrangement direction of the stems of the straw; transporting the sewed stems of the straw along with the grid cloth, impregnating the sewed stems of the straw in a resin impregnator; winding and curing the impregnated stems of the straw on the bamboo fiber reinforced layer to obtain a straw reinforced layer; and coating an antiseptic and waterproof material on the straw reinforced layer to form an outer protective layer.;
10. A method for manufacturing a composite pipe, the method comprising: cutting raw bamboo into bamboo chips; removing skins and piths of the bamboo chips, and slicing the resulting bamboo chips into bamboo strips; drying the bamboo strips; connecting the dried bamboo strips into a bamboo belt, and rolling the bamboo belt; providing straw and collecting stems thereof; drying the stems and cutting the stems in equal length; coating a fabric and an adhesive on a straight pipe mold to yield an inner liner layer; winding the bamboo belt on the inner liner layer, feeding an adhesive to the bamboo belt to coat the bamboo strips of the bamboo belt by the adhesive, and curing the bamboo belt to obtain a bamboo fiber reinforced layer; mixing and stirring a resin and a filler to yield a paste; evenly coating the paste onto a lining cloth, enwrapping the bamboo fiber reinforced layer using the lining cloth on to yield an auxiliary reinforced layer; winding a grid cloth on the bamboo fiber reinforced layer; parallelly arranging the stems of the straw on the grid cloth; pressing and flattening the arranged stems of the straw, sewing the stems of the straw perpendicularly to an arrangement direction of the stems of the straw; transporting the sewed stems of the straw along with the grid cloth, impregnating the sewed stems of the straw in a resin impregnator; winding and curing the impregnated stems of the straw on the bamboo fiber reinforced layer to obtain a straw reinforced layer; and coating an antiseptic and waterproof material on the straw reinforced layer to form an outer protective layer.

Summary

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