Expansion-broken softened cork preparation method

Abstract

The invention relates to a method for preparing expansion and breaking softened cork. The method comprises: (1) a step of removing impurities in raw materials, during which impurities on the surface of cork bark are planed and brushed to remove a black skin; (2) a step of adding water directly for expansion and breaking softening, in which cork is filled in an expansion and breaking softening tank with a heating system before impregnating smoldering, steaming and boiling, added with water on the basis of the prior water content till the total water content reaches 15 to 50 percent, closed and heated till the pressure rises to 0.5 to 3MPa / cm<2> and the temperature reaches between 100 and 230 DEG C, and kept at the temperature to be fully impregnated, the air is released quickly for pressure reduction, the air is compressed for cooling, and thus the expansion and breaking softened cork is obtained. The method has the advantages of avoiding pollution in the whole process, improving the utilization rate and excellent rate of natural materials due to environmentally-friendly production and fundamentally improving the quality of China cork raw material and products.

Description

technical field

[0001] The invention belongs to the technical field of processing and modification of forest chemical cork products and raw materials. Background technique

[0002] The traditional cork raw material modification and processing technology is to add different chemical agents to water solvents to cook and bake the cork at normal pressure to achieve the purpose of swelling and softening. The cork is crushed directly with a pulverizer, and then repeatedly ground with a pulverizer, multi-layer sieved to obtain meshes of different sizes, wind sorting, and sand and dust removal. Or remove the sand from the bark section (about 1mm). And the large piece of cork with a diameter and thickness greater than 1mm is difficult to remove sand, the production and processing efficiency is low, the particle is small, the cork loss rate is high, the dust pollutes the environment seriously, and it is easy to cause fire, and the waste of resources and energy is serious. The Portug...

Examples

Embodiment Construction

[0031] 1. First, soak the whole piece of original bark in water and remove the black skin. The primary skin may not be removed. The primary skin is brushed with a leather brushing machine, the secondary skin is planed, and the small pieces are ground with a roller ball mill to remove the black skin. It can also be processed by a mill without black skin bulk particles. 2. Add the above-mentioned peeled cork or large-grained cork without or with penetrating agent, mix and soak for 24 hours, let it permeate on the surface, heat and penetrate better, boil it in water at 100-120°C for 2 hours to make it contain water The rate reaches 15-50%. 3. Put the cork chips and blocks with high moisture content into the expansion pot ( Figure 1 ), add saturated steam, the pressure rises to 0.5Mpa-3Mpa, the temperature is 140-230°C, and the cork is quickly deflated and decompressed to discharge. Water and compressed air cooling, set different cooling temperatures to achieve the purpose of s...

technical field

[0001] The invention belongs to the technical field of processing and modification of forest chemical cork products and raw materials. Background technique

[0002] The traditional cork raw material modification and processing technology is to add different chemical agents to water solvents to cook and bake the cork at normal pressure to achieve the purpose of swelling and softening. The cork is crushed directly with a pulverizer, and then repeatedly ground with a pulverizer, multi-layer sieved to obtain meshes of different sizes, wind sorting, and sand and dust removal. Or remove the sand from the bark section (about 1mm). And the large piece of cork with a diameter and thickness greater than 1mm is difficult to remove sand, the production and processing efficiency is low, the particle is small, the cork loss rate is high, the dust pollutes the environment seriously, and it is easy to cause fire, and the waste of resources and energy is serious. The Portug...

Examples

Embodiment Construction

[0031] 1. First, soak the whole piece of original bark in water and remove the black skin. The primary skin may not be removed. The primary skin is brushed with a leather brushing machine, the secondary skin is planed, and the small pieces are ground with a roller ball mill to remove the black skin. It can also be processed by a mill without black skin bulk particles. 2. Add the above-mentioned peeled cork or large-grained cork without or with penetrating agent, mix and soak for 24 hours, let it permeate on the surface, heat and penetrate better, boil it in water at 100-120°C for 2 hours to make it contain water The rate reaches 15-50%. 3. Put the cork chips and blocks with high moisture content into the expansion pot ( Figure 1 ), add saturated steam, the pressure rises to 0.5Mpa-3Mpa, the temperature is 140-230°C, and the cork is quickly deflated and decompressed to discharge. Water and compressed air cooling, set different cooling temperatures to achieve the purpose of s...

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