Biological preservation technique for natural latex

Abstract

The invention discloses a biological preservation technique for natural latex. The biological preservation technique comprises culture of symbiotic bacterium groups for preservation, mixing of a bacterium solution and latex and preservation under light and is characterized in that the symbiotic bacterium groups for preservation are self-supporting symbiotic bacterium groups, the microbiota for preserving the natural latex can better realize internal self-supporting of nutrition required for breeding and do not need to obtain required nutrients from the fresh latex, the fresh latex contains a large amount of water which accounts for 55%-75% the total mass of the latex, the large amount of water can effectively provide a living environment and a metabolite conversion environment for survival of beneficial microorganisms, protein in the fresh latex cannot be easily decomposed and enables the fresh latex to solidify quickly, so that other unnecessary bacteria can be dispelled through breeding of the beneficial microorganisms in the latex, the pH value of the latex is effectively adjusted, a hydrated shell is protected, and high-quality latex capable of being stored for a long time can be obtained.

Description

technical field [0001] The invention relates to the field of stability treatment of natural rubber latex in chemical organic polymer compounds, in particular to a biological preservation technology of natural latex. Background technique [0002] Natural rubber is widely planted in the tropics of our country, and the existing rubber harvesting is facing a serious problem, because most of the planting of rubber trees are distributed in the mountains, and some rubber farmers live in remote areas , the traffic in these areas is extremely inconvenient. At the same time, due to the abundant rainfall in the tropical climate, landslides often occur on the road, which further affects the local traffic. It is especially important to keep the latex harvested from the rubber tree stable. The best way is to sell it to the rubber processing factory in time. A preliminary processing treatment, so that the white gel rubber block with better quality can be obtained. The good quality white ge...

AI Technical Summary

Problems solved by technology

[0002] Natural rubber is widely planted in the tropics of our country, and the existing rubber harvesting is facing a serious problem, because most of the planting of rubber trees are distributed in the mountains, and some rubber farmers live in remote areas , the traffic in these areas is extremely inconvenient. At the same time, due to the abundant rainfall in the tropical climate, landslides often occur on the road, which further affects the local traffic. It is especially important to keep the latex harvested from the rubber tree stable. The best way is to sell it to the rubber processing factory in time. A preliminary processing treatment, so that the white gel rubber block with better quality can be obtained. The good quality white gel rubber block not only has good physical and chemical properties of the rubber itself, but it is difficult for a large number of harmful microorganisms in latex due to timely processing. Reproduction, the large number of harmful microorganisms will cause the latex to emit a bad smell, but also because the microorganisms consume the protein and sugar in the latex to reduce the physical and chemical properties of the white gel block, and the latex that cannot be processed in time will deteriorate, especially when the temperature is relatively low. especially prominent at high

In the existing technology, the rubber farmers directly place it in the carrying cup, and after several days of natural coagulation, they obtain "pastoral cup glue". These "pastoral cup glue" have a strong odor. It has a great impact on the surrounding environment. At the same time, these "pastoral cup glue" are decomposed by a large number of microorganisms to the protein and sugar contained in the latex, and a large amount of acidic substances are produced, which leads to the performance of the "pastoral cup glue". The reduction also makes the price of "pastoral cup glue" drop

[0003] Then the natural coagulation of latex brings so many adverse consequences. If the latex is not allowed to coagulate naturally, this problem seems to be solved. The coagulation of latex refers to the process of transforming latex from a stable state to its opposite under certain conditions. In other words, coagulation It is the process of destroying stability, and fresh-keeping is the process of maintaining stability. Long-term fresh-keeping refers to maintaining the stability of latex for a long time. The fresh latex just discharged from the rubber tree has a pH of about 7.0, which is higher than the isoelectric point of protein. Therefore, the protein in the protective layer of the rubber particles is acid-ionized, which makes the surface of the rubber ions negatively charged, thereby causing the polarization of the surrounding water molecules, generating induced dipoles and directional arrangement on the surface of the rubber particles to form a layer of hydration. Therefore, to make the latex coagulate, it is necessary to destroy these two characteristics of the rubber particles, that is to say, to neutralize the charge on its surface or to destroy its hydration film. Almost all coagulation methods are based on this point, on the contrary The fresh-keeping technology is to protect the charge or hydration film on its surface. There are a large number of microorganisms in nature, which means that microbial parasitism is inevitable during the long-term storage of latex, and the metabolites produced by some parasitic microorganisms The acidic substances or other metabolites produced in the process will destroy the surface charge or destroy the hydration film, which naturally leads to the coagulation of the latex. During the coagulation process, the rubber has an odor due to the presence of some microbial metabolites. odor, and the reproduction of microorganisms decomposes a large amount of protein and sugar, which leads to the decline in the quality of the latex after solidification, so we need to keep the latex fresh, whether it is when there is excess material accumulation in large enterprises or remote areas that cannot be transported out for sale in time When we all need latex preservation technology

[0004] The prior art also has the method of adding 0.2-0.7 parts of ammonia water, 1-1.5 parts of potassium ferrocyanide, 0.3-0.5 parts of sodium metabisulfite, 0.1-0.3 parts of ethylparaben, 0.2-0.3 parts of nipagin for the preservation of latex. Parkin propyl ester, 0.3-0.5 parts of sodium bicarbonate, 1-3 parts of sodium citrate and other organic or inorganic chemical preparations to achieve freshness preservation. In this freshness preservation method, firstly, the quality of rubber decreases, and secondly, it still cannot Eliminate the invasion and parasitism of microorganisms. In the theory of microorganisms, there is a theory that beneficial bacteria expel harmful bacteria. Since harmful bacteria cannot be completely eliminated, why don't we introduce bacteria that are beneficial to latex to keep fresh? The introduction will not change the pH value At the same time, it will not lead to the reduction of negative charge, and will not destroy the beneficial bacteria flora of the hydration film

[0005] In the face of such problems, researchers have not proposed a suitable technology, and some have proposed the use of microbial preservation technology to let rubber farmers in remote areas or enterprises that cannot process in time add microorganisms that will not cause a large amount

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