Bamboo mold and antibiotic formula
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Bamboo resources grow fast and have a short growth cycle. Generally, they can be harvested and used in four to five years. In the whole process of production and management of resources, as long as you pay attention to reasonable harvesting, it is easy to achieve sustainable use of resources. Due to the advantages of bamboo resources, in recent years, China's bamboo industry has already had a certain scale, showing great prospects in various fields such as construction, transportation, furniture, paper and packaging. Such as bamboo laminates, bamboo plywood, bamboo particleboard, all kinds of bamboo mats, bamboo chopsticks, toothpicks, meat tags and bamboo furniture, handicrafts, are favored by domestic and foreign users.
However, due to the great difference in the physical and chemical properties of bamboo compared with wood, especially the bamboo has the disadvantages of mildew and insects, and the utilization of bamboo resources is greatly limited. Therefore, efforts to explore simple, easy-to-use, low-cost insect-proof, mildew-proof, bleaching, and dyeing processes have become an important issue for broadening the use of bamboo materials and improving the use value and economic value of bamboo. Based on the production practice and research results, this paper provides bamboo processing enterprises with some common bamboo mold, bleaching and dyeing process methods for reference.
First, the bamboo mold
Bamboo is rich in nutrients. These nutrients are mildewed in bamboo products under certain conditions of temperature and humidity. This phenomenon is caused by the growth of mold.
How to prevent and control the mildew of bamboo? In theory, it is to kill the mold and eggs present in the bamboo, and extract the nutrients in the bamboo, such as glucose, protein and starch, so that there is no moldy mother in the bamboo, and reduce The conditions on which to live. However, to achieve this goal, it is very difficult to actually operate. It is assumed that there is an anti-fungal agent, and its strong anti-mildew effect may achieve the above two purposes. However, it is likely to cause damage to the physical and chemical properties of bamboo. In production practice, people often control the anti-mildew effect by controlling the concentration of anti-mold drugs and the time of action on bamboo. When the concentration of the drug is high and the action on the bamboo is long, it shows a killing effect on the mold, and when the concentration of the drug is low, it shows an inhibitory effect on the mold. Therefore, these interactions, which are contradictory factors, have become a problem in bamboo mold-proof technology.
The results of many years of anti-mold technology research in China have been successfully developed. Anti-insect and anti-fungal agents for cooking, smoking, coating, etc., and have been widely used in production practice. This article introduces two more successful bamboo anti-mildew techniques for reference by the production unit. These two drugs, after a long period of use, because of its high efficiency, broad spectrum, low toxicity, long-acting, good water solubility and stability, low volatility, good wettability, do not affect the performance of bamboo, but also have cheap It is well received by users because of its abundant supply and convenient use.
1. "Zhu Fang No. 2" insect proof and mildew proof preparation:
"Bamboo Defense No. 2" is a special anti-insect and anti-mold agent for bamboo materials developed by Guangdong Chemical Industry Research Institute. It has remarkable anti-insect and anti-mildew effects for bamboo products. It has long anti-effect period, convenient use, easy operation, safe and reliable, and economical. Affordable and other advantages. This product has won the "Golden Dragon Award" for the outstanding new product of the National Economic Commission in 1983.
(1) "Bamboo Defense No. 2" performance:
"Bamboo No. 2" powder is composed of high-efficiency, strong fungicide and insecticide. The active ingredient is greater than 98%. It is a light yellow powder with a slightly irritating odor. Slightly soluble in water, more soluble in hot water. The toxicity of 0.5% bamboo anti-No. 2 solution was tested by Zhongshan Medical College. It showed no irritation and sensitization to the skin; it had no stimulating effect on the mucous membrane of the eye. The mouse test is micro-toxic. According to the method of using this medicine, the bamboo products have a mildew resistance rate of 98% or more, and the insect control rate is 85% or more. The effectiveness period is not less than one year.
(2) Treatment methods of bamboo products
A: Preparation of liquid medicine: The preparation ratio is 1:200, that is, 1 kg of bamboo anti-No. 2 powder with 200 kg of water. In the cement pool or pottery tank, first 160 jins of clear water. Put 1 kilogram of powder into the medicine barrel (plastic barrel or wooden barrel), add 30 kilograms of water to the water for five times, stir with bamboo rod for a few minutes, dissolve the powder, and then pour the supernatant into the cold pool (cylinder) In the middle, stir while stirring, repeat this three to four times, and finally pour the remaining 10 kilograms of boiling water into the bucket and wash it into the cold pool (cylinder).
B: Processing operation:
1 Determination of the immersion time of bamboo products with a weight gain of 15-20%: In order to ensure the anti-insect and anti-mildew effect of bamboo products, the bamboo products should be increased by 15-20% after immersion. In order to determine this indicator, the user should first measure the immersion time of 15-20% of the weight gain beforehand. The specific method is: first take three sets of the same model, and divide into three groups. The weight (ie dry weight W dry) was weighed separately, and then immersed in the syrup, the immersion time was 20, 25 respectively. After 30 minutes, the dry syrup was taken out, and the wet weight (W wet) was weighed, and the weight gain percentage was calculated according to the following formula.
Percentage of weight gain = (w wet one w dry) / w dry X100%
Thereby, it is possible to determine the immersion time of 15-20% by weight.
2 immersion treatment: the bamboo products are all immersed in the prepared chemical solution (do not expose the syrup surface) to reach the immersion time of 15-20% weight gain, take out the dripping syrup, air dry or dried, and packaged into the warehouse.
3 Storage and addition of liquid medicine: "Bamboo Defense No. 2" has stable chemical properties and can be used repeatedly without being discarded. However, when the liquid cannot be immersed in bamboo products, the liquid should be added in time, and the added liquid is prepared at a ratio of 1:180. When the liquid is not in use, cover it to prevent rain or other debris from entering.
C: Note:
1 "Bamboo Defense No. 2" powder has certain toxicity, it must be kept by a special person, do not directly enter.
2 Operators should have rubber gloves, do not let the skin directly contact the potion. Wear a mask and glasses when dispensing pharmaceutical water. Wash hands and feet with soap after handling.
3 The use of this drug to treat bamboo products must be carried out in strict accordance with the method of use.
4 Bamboo products that need varnish should be dried with bamboo anti-No. 2 and then varnished.
2. How to use MDF anti-fungal agent
MDF anti-fungal agent is a new anti-mildew product developed by Guangdong Chemical Industry Research Institute. Through the Sino-foreign joint venture Guangdong Shunlong Medium Density Fiberboard Co., Ltd., the production and application of the West Germany's Beierkamp production line makes the bagasse medium density fiberboard and bamboo particleboard have good anti-mildew effect, easy to operate and safe, and basically no need to add equipment. It can be matched with Chinese and foreign fiberboard and particleboard production lines without changing the original process. The product is launched in domestic and foreign markets and is well received by users.