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Dyeing process for veneer

A veneer and process technology, applied in the field of veneer dyeing, can solve the problems of long penetration time, easily damaged raw materials, etc., and achieve the effects of thorough dyeing, stable protection structure, and not easy to break.

Active Publication Date: 2018-12-04
HUNAN DONGLIANG WOOD IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

H at atmospheric pressure 2 o 2 Cleaning is to infiltrate layer by layer. After the upper layer is cleaned, the lower layer will be cleaned, so the upper layer will be infiltrated for too long, which will easily damage the raw materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The invention provides a technical solution: a veneer dyeing process, comprising the following steps:

[0021] S1: peeling, peeling the logs according to the required thickness, the thickness is 1.2mm;

[0022] S2: Before bleaching, adjust NaOH and water according to the ratio of 5g / L, and mix them into caustic soda solution. Soak in a vacuum tank, the soaking time is 4 hours, and keep the high temperature and high pressure in the first vacuum tank, the temperature in the tank is kept at 30 degrees Celsius, and the pressure is kept at 0.80.8mpa;

[0023] S3: bleaching, the temperature in the first vacuum tank is kept at 40 degrees, and the H 2 o 2 The solution is injected into the first vacuum tank, allowing H 2 o 2 React with NaOH deeper, so as to bleach the veneer with a high thickness, and the bleaching time is 6 hours;

[0024] S4: Cleaning: Set the temperature in the first vacuum tank to normal temperature, maintain vacuum and high pressure in the first vacuum...

Embodiment 2

[0029] The invention provides a technical solution: a veneer dyeing process, comprising the following steps:

[0030] S1: peeling, peeling the logs according to the required thickness, the thickness is 3.0mm;

[0031] S2: Before bleaching, adjust NaOH and water according to the ratio of 5g / L, and mix them into caustic soda solution. Soak in a vacuum tank, the soaking time is 4 hours, and keep the high temperature and high pressure in the first vacuum tank, the temperature in the tank is kept at 50 degrees Celsius, and the pressure is kept at 1.3mpa;

[0032] S3: bleaching, the temperature in the first vacuum tank is kept at 70 degrees, and the H 2 o 2 The solution is injected into the first vacuum tank, allowing H 2 o 2 React with NaOH deeper, so as to bleach the veneer with a high thickness, and the bleaching time is 6 hours;

[0033] S4: Cleaning: Set the temperature in the first vacuum tank to normal temperature, maintain vacuum and high pressure in the first vacuum ta...

Embodiment 3

[0038] The invention provides a technical solution: a veneer dyeing process, comprising the following steps:

[0039] S1: peeling, peeling the logs according to the required thickness, the thickness is 2mm;

[0040] S2: Before bleaching, adjust NaOH and water according to the ratio of 5g / L, and mix them into caustic soda solution. Soak in a vacuum tank, the soaking time is 4 hours, and keep the high temperature and high pressure in the first vacuum tank, the temperature in the tank is kept at 40 degrees Celsius, and the pressure is kept at 1.0mpa;

[0041] S3: bleaching, the temperature in the first vacuum tank is kept at 60 degrees, and the H 2 o 2 The solution is injected into the first vacuum tank, allowing H 2 o 2 React with NaOH deeper, so as to bleach the veneer with a high thickness, and the bleaching time is 6 hours;

[0042] S4: Cleaning: Set the temperature in the first vacuum tank to normal temperature, maintain vacuum and high pressure in the first vacuum tank...

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Abstract

The invention discloses a dyeing process for a veneer. The dyeing process is characterized by comprising the following steps: S1, planing of a veneer: planing a log according to a required thickness in a range of 1.2 mm-3.0 mm; S2, pre-bleaching treatment: preparing NaOH and water according to a ratio of 5 g / L and carrying out mixing to obtain a caustic soda solution; S3, bleaching: maintaining the temperature of a first vacuum tank at 40-70 DEG C; S4, cleaning: setting the temperature of the first vacuum tank to be normal temperature, and maintaining the first vacuum tank in vacuum and high-pressure states, wherein due to the vacuum state, a bleaching agent impregnated into the veneer is sucked out due to the generation of water negative pressure; S5, preparation of dyeing liquid: preparing the dyeing liquid under high-temperature, vacuum and high-pressure conditions, wherein the dyeing liquid is composed of acid red with a concentration of 3.5 g / liter, acid yellow with a concentration of 10 g / liter and acid blue with a concentration of 3.1 g / liter; and S6, dyeing. The dyeing process of the invention realizes the dyeing of the veneer under the vacuum condition, allows the dyeing of the veneer to be more thorough, and allows the structure of wood to be stable and to not prone to damage.

Description

technical field [0001] The invention relates to the technical field of veneer dyeing, in particular to a veneer dyeing process. Background technique [0002] During bleaching and dyeing, H 2 o 2 (Hydrogen peroxide) is used to clean up the minerals and colloids inside the veneer. H at atmospheric pressure 2 o 2 Cleaning is to infiltrate layer by layer. After the upper layer is cleaned, the lower layer is cleaned, so the upper layer will take too long to infiltrate and easily damage the raw materials. Contents of the invention [0003] The object of the present invention is to provide a kind of veneer dyeing process, to solve the problems raised in the above-mentioned background technology. [0004] In order to achieve the above object, the present invention provides the following technical solutions: a kind of veneer dyeing process, comprising the following steps: [0005] S1: peeling, peeling the logs according to the required thickness, the thickness is 1.2mm-3.0mm;...

Claims

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Application Information

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IPC IPC(8): B27K5/02B27K5/04B27K3/08
CPCB27K3/086B27K5/02B27K5/04
Inventor 杨杨芳
Owner HUNAN DONGLIANG WOOD IND