A kind of manufacturing method of bamboo plywood

A production method and plywood technology, applied in the field of board manufacturing, can solve the problems of low bonding strength of natural adhesives, non-natural adhesives containing formaldehyde, and poor water resistance, so as to achieve weak adhesion, prevent bamboo cracking, and prevent bamboo from cracking. good cracking effect

CN108356926BActive Publication Date: 2021-01-29贵港市业成木业有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-01-29

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Abstract

The invention discloses a manufacturing method of bamboo plywood, which comprises the steps of heat treatment, coating anti-cracking agent, making bamboo chips, drying, repairing, gluing, forming blanks, pre-pressing, hot pressing, cooling, edge trimming and polishing . The heat treatment process is: boil the bamboo in lye for 20-30 minutes; the process of coating the anti-cracking agent is: take the boiled bamboo out of the lye and immediately apply the anti-cracking agent to the surface of the bamboo; the drying condition is The method is as follows: drying the wood until the moisture content of the wood is 15-20%; the gluing process is: the adhesive is coated on the surface of the wood to form a glue layer; the pre-pressing process is: the wood after the billet is set aside for 10-20% After 20 minutes, pre-press at 0-5°C for 10-20 minutes, the pressure used for the pre-press is 0.5-1.0Mpa; The pressure of ~2Mpa is pressed for 0.5 ~ 1min. The bamboo plywood made by the invention has no formaldehyde, high safety, good adhesion and high quality.
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Description

technical field

[0001] The invention relates to the technical field of plate manufacturing, in particular to a method for making a bamboo plywood. Background technique

[0002] Plywood is made of three layers of veneer made of different materials. Since the adhesive containing formaldehyde is used in the production, the use of plywood to make furniture will release formaldehyde. In addition to causing respiratory and nervous system diseases, such as cough, sore throat, chest tightness, dizziness, nausea, limb weakness, dyspnea, lethargy and other symptoms, formaldehyde can also induce the development of cancers such as nose cancer, throat cancer, skin cancer and leukemia. occur.

[0003] Most of the adhesives used in the prior art contain formaldehyde, and the adhesives without formaldehyde can be natural polymers, mainly soybean protein adhesives, etc., but this adhesive has low bonding strength and poor water resistance. shortcoming. Therefore, a formaldehyde-free adhe...

Examples

Embodiment 1

[0028] A kind of manufacture method of bamboo plywood comprises the steps:

[0029] (1) heat treatment: the bamboo is placed in the lye and boiled for 30min; the lye is a sodium hydroxide solution with a molar concentration of 1mol / L;

[0030] (2) coating anti-cracking agent: after the bamboo after the poaching is taken out from lye, smear on the surface of bamboo with anti-cracking agent immediately; Described anti-cracking agent coating amount is 80g / m ; Described anti-cracking agent is made of The following raw materials are composed of parts by mass: 20 parts of turpentine, 5 parts of camphor, 2 parts of chitosan, 9 parts of cornstarch, 1 part of ethyl acetate, 7 parts of flavonoids, and 1 part of phenol;

[0031] (3) making bamboo chips;

[0032] (4) Drying: the bamboo chips are placed in a drier with a relative air humidity of 30%, and the temperature is 30°C, and the wind speed is 20m / s to dry to a moisture content of 15% of the bamboo chips;

[0033] (5) Repair;

[...

Embodiment 2

[0041] A kind of manufacture method of bamboo plywood comprises the steps:

[0042] (1) heat treatment: the bamboo is placed in the lye and boiled for 20min; the lye is potassium hydroxide with a molar concentration of 1mol / L;

[0043] (2) be coated with anti-cracking agent: after the bamboo after the poaching is taken out from lye, be applied to the surface of bamboo with anti-cracking agent immediately; Described anti-cracking agent coating amount is 50g / m ; Described anti-cracking agent is made of The following raw materials are composed of parts by mass: 30 parts of turpentine, 1 part of camphor, 7 parts of chitosan, 2 parts of cornstarch, 5 parts of ethyl acetate, 4 parts of flavonoids, and 7 parts of phenol;

[0044] (3) making bamboo chips;

[0045] (4) Drying: the bamboo chips are placed in a drier with a relative air humidity of 26%, and the temperature is 40° C., and the wind speed is 10 m / s to dry to the moisture percentage of the bamboo chips to be 20%;

[0046] ...

Embodiment 3

[0054] A kind of manufacture method of bamboo plywood comprises the steps:

[0055] (1) heat treatment: the bamboo is placed in the lye and boiled for 25min; the lye is a calcium hydroxide solution with a molar concentration of 2mol / L;

[0056] (2) be coated with anti-cracking agent: after the bamboo after the poaching is taken out from lye, be applied to the surface of bamboo with anti-cracking agent immediately; Described anti-cracking agent coating amount is 60g / m ; Described anti-cracking agent is made of The following raw materials are composed of parts by mass: 25 parts of turpentine, 3 parts of camphor, 5 parts of chitosan, 6 parts of cornstarch, 3 parts of ethyl acetate, 5 parts of flavonoids, and 6 parts of phenol;

[0057] (3) making bamboo chips;

[0058] (4) Drying: the bamboo chips are placed in a drier with a relative air humidity of 28%, with a temperature of 35°C and a wind speed of 15m / s to dry the bamboo chips to a moisture content of 18%;

[0059] (5) Repa...