Low-temperature cocoon cooking method for mulberry cocoon with little sericin

Abstract

The invention discloses a low-temperature cocoon cooking process for a mulberry cocoon with little sericin, which comprises a step of soaking dry mulberry cocoon with little sericin in water at the temperature of 35 DEG C under vacuum, wherein the water temperature of the I soaking section on an upper groove of a cocoon cooking machine is 35 DEG C; the water temperature of the II soaking section is 45 DEG C; the cooking temperature is 80 DEG C; the temperatures of a middle section, a vibrating section and a statically cooking section on a cooking part are 50 DEG C, 40 DEG C and 30 DEG C respectively; the temperature of an outlet part is 30 DEG C; the cocoon cooking time is 14 minutes; and the difference between the reelability percentage of the low-temperature cocoon cooking process and the reelability percentage of a high-temperature cocoon cooking process is no more than 5 percent. Matched with the popularization of new products of the mulberry cocoon with little sericin, the low-temperature cocoon cooking process realizes energy conservation and emission reduction in a reeling process and has direct economic benefit and wide social benefit for creating an energy-saving and emission-reducing 'low-carbon' society.

Description

technical field [0001] The invention relates to a cocoon cooking process, in particular to a low-temperature cocoon cooking process suitable for silkworm cocoons with less sericin. Background technique [0002] Silkworm (Bombyx mori L.) has been domesticated in my country for more than 5,700 years. It belongs to the complete metamorphosis insect of Lepidoptera Bombyridae, and its generations include egg, larva, pupa and adult (moth). The larva spins silk and forms a cocoon in the later stage, and pupates in the cocoon, and the pupal period is about 15 days. Silkworm cocoons can be used to reel raw silk, which is an important raw material for silk spinning. [0003] The cocoon silk of the silkworm cocoon is composed of sericin in the outer layer and silk fibroin in the inner layer. Sericin accounts for about 25% of the cocoon silk weight, and silk fibroin accounts for about 75%. The cocoon layer forms a large amount of cohesive points (more than about 1,000,000) because the...

AI Technical Summary

Problems solved by technology

After cocoon cooking at high temperature, the content of sericin in cocoon silk is reduced from about 25% to about 20%. The dissolved sericin has not yet been recycled, and silk reeling wastewater contains a large amount of sericin, which increases the cost of sewage treatment , some silk factories discharge waste water directly, which has a great impact on the ecological environment; in addition, because the entire cocoon cooking process uses high temperature, a large amount of heat supply is required, which increases the production cost of the silk factory

[0012] At present, my country has bred a new breed of silkworm with less sericin, and the content of sericin is about 18%, but there is no cocoon cooking process matching the breed with less sericin, and the traditional high-temperature cocoon cooking process causes a lot of energy waste