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A kind of manufacturing method of bamboo heavy wood with outdoor weather resistance

A technology of bamboo recombined wood and manufacturing methods, which can be applied to flat products, household utensils, and other household utensils. It can solve problems such as the discharge of acidic smoke, the quality of bamboo strips that are easy to become brittle, and the long time of heat treatment. It has reached maturity Short, high-performance, quality-controllable effects

Active Publication Date: 2018-05-08
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, outdoor bamboo recombination has been developed, but in the manufacturing process, the heat treatment of rolled bamboo strips takes a long time, there is acid fume emission, the bamboo strips are easy to become brittle during the process, and the quality is not easy to control , it is especially necessary to find a more effective heat treatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The cold-pressing and heat-curing manufacturing method of outdoor weather-resistant bamboo composite wood is as follows:

[0027] Step (1) Rolling bamboo strips with a moisture content of 30%: In a closed high-pressure tank, put high-temperature steam; first discharge the cold air and condensed water in the tank, and then quickly raise it to 140 under high-temperature steam ℃, after 10 minutes of heat treatment, under such a high temperature and high moisture content, the hemicellulose has been degraded, and the bamboo strips have been carbonized at this time; the condensed water and residual steam are discharged, and the temperature is lowered, and the moisture content is also reduced to 8 %, if the moisture content is higher than 12%, you need to continue drying, and dry it to 12%;

[0028] Step (2) Dipping and balancing of bamboo strips: impregnate the dried bamboo strips in phenolic glue with a solid content of 20%, so that the amount of dipping glue reaches 10% of ...

Embodiment 2

[0032] The cold-pressing and heat-curing manufacturing method of outdoor weather-resistant bamboo composite wood is as follows:

[0033] Step (1) Rolling bamboo strips with a moisture content of 70%: In a closed high-pressure tank, put high-temperature steam; first discharge the cold air and condensed water in the tank, and then quickly rise to 180 under high-temperature steam ℃, and after 60 minutes of heat treatment, under such a high temperature and high moisture content, the hemicellulose has been degraded, and the bamboo strips have been carbonized at this time; the condensed water and residual steam are discharged, and the temperature is lowered to reduce the moisture content to 25%. , if the moisture content is higher than 12%, you need to continue drying, and dry it to 10%;

[0034] Step (2) Dipping and balancing of bamboo strips: impregnate the dried bamboo strips in phenolic glue with a solid content of 25%, so that the amount of dipping glue reaches 16% of the weigh...

Embodiment 3

[0038] The cold-pressing and heat-curing manufacturing method of outdoor weather-resistant bamboo composite wood is as follows:

[0039] Step (1) Rolling bamboo strips with a moisture content of 45%: In a closed high-pressure tank, put high-temperature steam; first discharge the cold air and condensed water in the tank, and then quickly raise it to 155 under high-temperature steam ℃, after another 25 minutes of heat treatment, at such a high temperature and high moisture content, the hemicellulose has been degraded, and the bamboo strips have been carbonized at this time; the condensed water and residual steam are discharged, and the temperature is lowered to reduce the moisture content to 18%. , if the moisture content is higher than 12%, you need to continue drying, and dry it to 8%;

[0040] Step (2) Dipping and balancing of bamboo strips: impregnate the dried bamboo strips in phenolic glue with a solid content of 22%, so that the amount of dipping reaches 12% of the weight...

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Abstract

The invention discloses a manufacturing method for bamboo scrimber with outdoor weatherability. The manufacturing method comprises the following technological steps that (1) crushed bamboo splits with the water content being 30-70% are subjected to carbonizing treatment for a short time through high-temperature steam; (2) the bamboo splits are dipped in glue and dried, and then the water content of the bamboo splits is balanced; and (3) assemblies are glued and cured. Through the advantage that the crushed bamboo splits are subjected to heat treatment for a short time through the high-temperature steam and the characteristics of fast heating and hot and humid heat treatment of the high-temperature steam, hemicellulose and the like in the bamboo splits are subjected to thermal decomposition rapidly, the heat treatment time can be shortened to be within 3-5 hours from 24 hours, and a more convenient and faster heat treatment method is provided for raw materials of the bamboo scrimber, namely the unit bamboo splits; in addition, by the adoption of the heat treatment mode, the bamboo split quality is controllable, the bamboo scrimber manufactured through the processed bamboo splits is controllable in quality, more excellent in performance and suitable for being used indoors and outdoors, and a more excellent production method is provided for industrial production of the bamboo scrimber.

Description

technical field [0001] The invention relates to a method for manufacturing bamboo heavy wood with outdoor weather resistance, and belongs to the technical field of wood-based panel manufacturing in the wood industry. Background technique [0002] Outdoor wooden materials are an important part of my country's building decoration materials. Due to the perennial exposure to the wild, they have to experience the test of different harsh climates in various countries. Therefore, outdoor wooden materials are required to have high strength, high weather resistance, and high wear resistance; at the same time But also easy to install, beautiful and other requirements. For a long time, outdoor wood materials have mainly used natural solid wood and anti-corrosion wood, such as African pineapple grid, Burmese teak, South American Ibe and other tropical rainforest hard broad-leaved wood, and Russian sylvestris pine, American Southern Pine etc. However, with the development of social econ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/08B27M1/06
CPCB27M1/06B27N3/08
Inventor 许斌李延军程大莉何文张晓冬
Owner NANJING FORESTRY UNIV
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