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A pretreatment method for improving the dyeing performance of bamboo

A dyeing performance, bamboo technology, applied in wood treatment, wood treatment details, wood low-temperature treatment, etc., can solve the problems of light color, easy to fade, long size, etc., to change the cellulose structure, increase dyeing stability, and improve product quality. sexual effect

Active Publication Date: 2020-09-04
阜南佳利工艺品股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large thickness and long size of bamboo and wood materials, it is difficult to dye the wood evenly and thoroughly by the self-permeability of the dyeing solution under normal conditions. Bamboo and wood dyed products show defects such as false color, light color, easy to fade, and leakage of background color, so it is necessary to pre-treat bamboo before dyeing to improve its dyeing performance

Method used

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  • A pretreatment method for improving the dyeing performance of bamboo

Examples

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Comparison scheme
Effect test

Embodiment 1

[0017] A pretreatment method for improving bamboo dyeing performance, comprising the following contents:

[0018] (1) Put the bamboo raw material in a hydrochloric acid aqueous solution with a mass concentration of 7%, vacuumize it to 0.07MPa, keep it for 25 minutes, pressurize it to 0.55MPa, and keep the pressure for 3.5 hours. Microwave treatment for 15 minutes under power conditions;

[0019] (2) Treat the bamboo after the above treatment at -10°C for 50 minutes;

[0020] (3) Place the frozen bamboo in a treatment agent at a temperature of 45°C, vacuumize to a negative pressure of 0.06MPa, keep it for 50 minutes, take it out, and set aside;

[0021] The treatment agent includes the following raw materials in parts by weight: 3 parts of propylene glycol methyl ether acetate, 8 parts of hydroxycarboxylic acid, 2 parts of siloxane coupling agent, 1.2 parts of 1,3-propyl sultone, 0.4 parts of sodium benzoate 0.2 parts of 2,3,5-trimethylpyrazine, 100 parts of water;

[0022] ...

Embodiment 2

[0027] A pretreatment method for improving bamboo dyeing performance, comprising the following contents:

[0028] (1) Put the bamboo raw material in an aqueous hydrochloric acid solution with a mass concentration of 8%, evacuate it to 0.06MPa, keep it for 30 minutes, pressurize it to 0.45MPa, and keep the pressure for 4 hours. Microwave treatment under power conditions for 18 minutes;

[0029] (2) Treat the bamboo after the above treatment at -10°C for 60 minutes;

[0030] (3) Place the frozen bamboo in a treatment agent at a temperature of 42°C, evacuate to a negative pressure of 0.06 MPa, keep it for 60 minutes, take it out, and set aside;

[0031] The treatment agent includes the following raw materials in parts by weight: 4 parts of propylene glycol methyl ether acetate, 10 parts of hydroxycarboxylic acid, 1 part of siloxane coupling agent, 1.6 parts of 1,3-propyl sultone, 0.2 parts of sodium benzoate 0.3 parts of 2,3,5-trimethylpyrazine, 100 parts of water;

[0032] (4...

Embodiment 3

[0037] A pretreatment method for improving bamboo dyeing performance, comprising the following contents:

[0038] (1) Put the bamboo raw material in an aqueous hydrochloric acid solution with a mass concentration of 8%, evacuate to 0.08MPa, keep it for 20 minutes, pressurize to 0.65MPa, and keep the pressure for 4 hours. Microwave treatment under power conditions for 12 minutes;

[0039] (2) Treat the bamboo after the above treatment at -10°C for 40 minutes;

[0040] (3) Place the frozen bamboo in a treatment agent at a temperature of 48°C, evacuate to a negative pressure of 0.06 MPa, keep it for 40 minutes, take it out, and set aside;

[0041] The treatment agent includes the following raw materials in parts by weight: 2 parts of propylene glycol methyl ether acetate, 6 parts of hydroxycarboxylic acid, 3 parts of siloxane coupling agent, 0.8 part of 1,3-propyl sultone, 0.6 part of sodium benzoate 0.1 part of 2,3,5-trimethylpyrazine, 100 parts of water;

[0042] (4) Place t...

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Abstract

The invention belongs to the technical field of bamboo processing, and particularly relates to a pretreatment method for improving the dyeing performance of bamboo materials. The pretreatment method includes the steps of hydrochloric acid aqueous solution treatment, freezing treatment, treating agent treatment and drying-kiln drying treatment. Compared with the prior art, the pretreatment method has the advantages that through sequential hydrochloric acid dipping, microwave treatment, freezing treatment, treating agent treatment and drying-kiln drying treatment of the bamboo materials, the hemicellulose content in the bamboo materials is reduced, the cellulose structure is changed, and pores in fibers are enlarged; a siloxane coupling agent acts with a hydroxycarboxylic acid system to formcovalent bonds on the surfaces of the fibers, so that combination with dyestuff is benefited, the dye uptake is improved, the dyeing stability is improved, and the commercial property of products isenhanced.

Description

technical field [0001] The invention belongs to the technical field of bamboo processing, and in particular relates to a pretreatment method for improving the dyeing performance of bamboo. Background technique [0002] Bamboo products are often used in daily life, generally with pure natural colors, but due to visual characteristics and decorative characteristics, bamboo products often need to be dyed; because bamboo can react with hydrogen in the air in the natural environment and change color; The phenolic substances in bamboo are easily oxidized to produce darker quinones after contact with air, and the degradation products of lignin in bamboo are also extremely unstable to light, and are prone to degradation under its irradiation. The cellulose content in the lower bamboo wood decreases, the lignin content increases relatively, and the content of its chromogenic gene increases accordingly; in addition, the journey from the bamboo growth place to the processing base is us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/02B27K9/00B27K3/08B27K3/16B27K5/00B27K3/50B27K5/04
CPCB27K3/0207B27K3/0214B27K3/08B27K3/16B27K3/50B27K5/0005B27K5/0055B27K5/04B27K9/002
Inventor 徐学进
Owner 阜南佳利工艺品股份有限公司
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