4results about "Silk filament obtaining" patented technology

This invention relates to the field of silk processing technology and discloses a process for low-temperature extraction of silk from silkworm cocoons, comprising the following steps: S1, cocoon selection and pretreatment: screening the cocoons, then removing impurities, dust, and loose outer cocoon skin attached to the surface of the cocoons to obtain cocoons to be processed; S2, low-temperature vacuum impregnation: allowing the impregnation solution to fully penetrate into the interior of the cocoons to obtain impregnated cocoons; S3, low-temperature synergistic unwinding; S4, closed-loop tension-controlled low-temperature silk extraction; S5, low-temperature washing and gradient drying. By adopting a technical solution combining low-temperature vacuum impregnation and low-temperature synergistic unwinding, and using impregnation and unwinding solutions with specific components, the technical effect of fully impregnating and efficiently unwinding the cocoons without damaging the silk structure is achieved. Compared with the conventional impregnation or single unwinding techniques in the prior art, this solves the problems of insufficient cocoon impregnation, low unwinding efficiency, easy damage to the mechanical properties of silk, and unstable silk extraction process.

The utility model discloses a cocoon production and processing is with the cocoon device for taking off, including base, the top of base is equipped with the base plate, and the top of base is equipped with two stand all in the both sides of base plate, and the top of a plurality of stands is installed with the top seat, and the both sides of base plate top all are equipped with the first strip seat, and the top of first strip seat is equipped with the first guide rail, and the one side of first guide rail top portion is slidably installed with the first bearing plate, and the top of first strip seat one side base plate is installed with the first telescopic cylinder through the support, and one end of first telescopic cylinder is connected with the bottom of first bearing plate, and the top of base plate below is equipped with two second strip seats, and the top of second strip seat is equipped with the second guide rail. The utility model not only can double station in turn to silkworm cocoon and carry out the cocoon operation to guarantee the cocoon efficiency of cocoon device to silkworm cocoon when using, also reduced the labor intensity of personnel, improved the convenience of cocoon device when using, and reached the purpose of easy to dismouting maintenance of cocoon device.

The utility model discloses a kind of filter screen for cocoon cooking groove, belong to textile engineering technical field.The utility model includes filter screen and rail frame, filter screen is provided with three, three filter screens include hollow frame and solid frame, solid frame is slidably arranged in the inner wall of hollow frame, filter screen is set between hollow frame and solid frame, the side surface of solid frame is provided with reserved groove, rail frame includes T-shaped guide rail, one end of T-shaped guide rail is provided with two rows of screw holes, the other end of T-shaped guide rail is set in reserved groove.The utility model is through the structural design of filter screen, realizes high-efficiency grading filtration by the filter structure of three layers of slidable nesting, and the sliding fit of hollow frame and solid frame makes filter screen can be flexibly adjusted filter gap according to cocoon material characteristics, and three layers of filter screen adopt the design of gradually changing aperture from big to small, can effectively separate different particle size impurities, the filter screen structure of wave shape increases filter area, avoids single layer filter screen easy to block, and significantly improves filtering precision by hierarchical filtration.

The present invention addresses the objective of providing a novel expression system for producing a protein of interest stably and in large quantities in a lepidopteran insect such as a silkworm. The present invention also addresses the objective of providing a novel method for producing functional silk including a silk protein fused with a protein of interest. Provided is a transgenic lepidopteran insect, including a gene sequence of interest encoding a protein of interest or a fragment thereof in an exon sequence encoding a signal peptide or a functional fragment thereof of an endogenous gene, in which the protein of interest or the fragment thereof is fused to the C-terminal side of the signal peptide or the functional fragment thereof. Also provided is a transgenic lepidopteran insect, including a gene sequence of interest encoding a protein of interest or a fragment thereof in an exon sequence encoding a signal peptide or a functional fragment thereof of an endogenous gene, in which the protein of interest or the fragment thereof is fused between the signal peptide or the functional fragment thereof and a mature protein formed by cleaving the signal peptide from a precursor protein encoded by the endogenous gene or a C-terminal fragment thereof.