NL2030502B1

NL2030502B1 - Real silk and wool composite filament and preparation method thereof

Info

Publication number: NL2030502B1
Application number: NL2030502A
Authority: NL
Inventors: Jiang Wenkai; Chen Hongtai; Liu Aiqun; Zheng Jian
Original assignee: Dh Silco Entpr Co Ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2023-07-17

Abstract

The real silk and wool composite filament of the present disclosure has both the characteristics of wool and real silk, and no wide and sharp strands occur, which can save the cost of weaving in the later stage.

Description

P832/NLpd

REAL SILK AND WOOL COMPOSITE FILAMENT AND PREPARATION METHOD

THEREOF

TECHNICAL FIELD

The present disclosure relates to the technical field of functional real silk preparation, and more particularly to a real silk and wool composite filament and a preparation method thereof.

BACKGROUND ART

The existing real silk and wool composite filament is gener- ally subjected to combined spinning by weaving factory, and its structure is generally as shown in FIG.1. But such stranded silk has the following defect that the strength and the elongation of the real silk and the wool yarn have certain differences.

SUMMARY

The present disclosure provides a real silk and wool compo- site filament to solve the problems in the prior art. The real silk and wool composite filament comprises a wool yarn with a cen- ter core in linear or approximately linear arrangement. More than eight single cocoon silks which are not mutually overlapped are adhered on the outer side wall of the wool yarn. The silk thread directions of the more than eight cocoon silks are the same and are parallel to each other. The composite filament contains 25 to 40% of cocoon silk.

Further, during a brushing operation in the step S3, the op- eration temperature is controlled to be 86 to 94°C; and during a yarn-shaking operation in the step $3, the operation temperature is controlled to be 38 to 42°C.

Further, a tangent line angle in the step 33 is 30 to 50°; and the tangent line angle is an included angle between an axis of each cocoon silk and an axis of wool.

Further, the wool yarn adhered with the cooked cocoon silks in the step 383 is controlled through a tension controller, so that the tension of 0.03 to 0.06 g/d is maintained in the process of adhering and winding the wool yarn to a small winding tool.

Further, the distance between the cooked cocoon silks adhered on the wool yarn in parallel in a step S4 is 0.01 to 0.05 mm.

Further, during rotating the cocoon silks adhered on the wool yarn in the step S54, cooked cocoons are maintained to be posi- tioned in a hot water environment being 40 to 45°C.

Further, the first drying in a step S6 comprises the step of drying for 5 to 30 seconds under the steam hot air condition being 105 to 120°C; and the second drying in the step S6 comprises the step of drying a small winding tool wound with silk threads in a drying room being 105 to 120°C for 5 to 8 hours.

The present disclosure at least has one of the following ad- vantages: 1. The composite filament has the characteristics of real silk and wool, and meanwhile, during the later weaving of a weav- ing factory, under the same tension, the flatness and the stiff- ness of the real silk can be ensured, and composite silk threads cannot be broken or generate wide and sharp strands; and in addi- tion, the fabric flaw points caused by the generation of the wide and sharp strands during the direct stranding of the wool yarn by the weaving factory can be greatly reduced. 2. The real silk and wool composite filament solves the prob- lem that the wool yarn or the real silk can easily cause end breaking during the simultaneous weaving of the real silk and the wool yarn in the weaving factory. 3. The real silk and wool composite filament can reduce the processing cost and the raw material processing cost of the soak- ing, reeling and doubling work procedures in the weaving factory, and at least 30,000 Yuan/ton of silk can be saved. 4. The real silk and wool composite filament prepared by a preparation method of the real silk and wool composite filament has the advantages that the adhering between cocoon yarns and the wool yarns is firm, a finished product generally cannot cause the cocoon silk falling, in addition, the finished product qualifica- tion rate can reach 95% or higher, and the spinning cost is great- ly reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG.1 is a schematic view of an existing silk and wool compo- site filament.

FIG.2 is a schematic view of a silk and wool composite fila- ment of the present disclosure.

FIG.3 is a schematic view of cocoon filament adhering of a silk and wool composite filament of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Example 1

As shown in FIG.2, a real silk and wool composite filament comprises a wool yarn 1 with a center core in linear or approxi- mately linear arrangement. The outer side wall of the wool yarn 1 is wrapped with 8 or 16 or 18 or 32 or other numbers of cocoon silks 2 in an adhering mode. The use amount of the cocoon silks 2 depends on the necessary use amount of the cocoon silks 2 wrapping the outer side wall of the wool yarn 1. The silk thread directions of the cocoon silks 2 are the same and are parallel to each other, and the composite silk contains 30% of cocoon silk 2. Through studies, the applicant finds that the real silk and wool composite filament prepared through the above structure needs to strictly control the cocoon silk 2 content to be 25%-40%, and otherwise the problem that the comprehensive performance of the composite fila- ment is reduced is likely to happen. In addition, compared with an existing structure, the composite filament of the above structure has the advantages that the cocoon silks are distributed on the surface of the wool yarn more tightly, and tension is distributed evenly.

The real silk and wool composite filament is prepared by a method comprises the following steps:

S1. Selecting qualified raw cocoons. 82. Carrying out cocoon stripping and cocoon selection work, namely after stripping cocoon shells of silkworm cocoons, carrying out cocoon selection, removing inferior cocoons, leftover cocoons and other cocoons which are not suitable for production, and car- rying out cocoon cooking operation on the obtained cocoons to ob-

tain cooked cocoons for later use.

S3. Carrying out brushing and yarn-shaking treatment on the cooked cocoons, then leading out silk thread ends of cooked cocoon silks 2, and adhering the silk thread ends of 2 or 3 or 4 or 6 or other numbers of cooked cocoon silks 2 to a wool yarn 1 from dif- ferent positions at a same tangent angle, wherein the brushing is a process of leading out end silks from the surfaces of cocoon layers of the cooked cocoons, and the yarn-shaking is a process of removing disordered end silks on the surfaces of the cocoon layers of the groped end cocoons and processing the groped end cocoons into positive end cocoons with one cocoon and one silk.

S4. Rotating the cocoon silks adhered on the wool yarn 1 so that the silk threads of the cooked cocoons are adhered to the wool yarn 1 in parallel, and carrying out sheath twisting opera- tion on the adhered silk threads, wherein the sheath twisting length is 17 cm; and the sheath twisting is a process of mutually twisting front and rear sections of the silk threads through ma- chine components, and the sheath twisting length is the length of mutual twisting.

S55. Detecting the thickness of the silk threads after sheath twisting, when the silk threads after sheath twisting are too thin, supplementing the silk thread ends adhered with new cooked cocoon silks 2, and continuously carrying out the rotation adher- ing and sheath twisting operation in the step S4. The applicant finds that if the silk threads after sheath twisting are too thin, the cocoon silks 2 adhered to the wool yarn 1 are insufficient.

Through the detection-silk increasing operation in the step, the problem that the cocoon silks 2 adhered to the surface of the wool yarn 1 are insufficient, and even the cocoon silks 2 are not ad- hered can be effectively prevented. And

S6. Carrying out a first drying on the detected silk threads wound on a small winding tool in the operation starting process, then carrying out a second drying, and after the second drying is finished, winding the composite silk wound on the small winding tool to a silk winding drum, and cutting rough and defected silk threads during winding. Through studies, the applicant finds that if the rough and defected silk threads are cut in the step $5, the rough and defected silk threads can be cut off in the first time, but the phenomenon that the cocoon silks 2 are unstably adhered to the wool yarn 1 in this section may be caused, and the product quality is unstable. If the rough and defected silk threads cut- 5 ting operation is carried out in the final winding process, the shape of the real silk and wool composite filament is fixed, the wrapping stability of the silk thread is not influenced even if the silk threads are subjected to cutting operation, so that the quality stability of the product is improved.

Example 2

Based on the real silk and wool composite filament in the Ex- ample 1, the qualified raw material cocoons in the step S1 are raw cocoons with a reelability percentage larger than 70%, a ten- thousand-meter hanging times lower than 2.5 times and a cocoon width uniformity larger than 75%. By adopting the standard raw co- coons, the real silk and wool composite filament with high quality can be obtained, the problem of end breakage of the cocoon silks 2 in the preparation process is solved, and the thickness of the re- al silk and wool composite filament is stabilized.

Example 3

Based on the real silk and wool composite filament in the Ex- ample 1, when the brushing operation in the step S3 is carried out, the operation temperature is controlled to be 24°C; and when the yarn-shaking operation in the step 33 is carried out, the op- eration temperature is controlled to be 42°C.

Example 4

Based on the real silk and wool composite filament in the Ex- ample 1, when the brushing operation in the step S3 is carried out, the operation temperature is controlled to be 86°C; and when the yarn-shaking operation in the step S3 is carried out, the op- eration temperature is controlled to be 38°C.

Example 5

Based on the real silk and wool composite filament in the Ex- ample 1, when the brushing operation in the step S3 is carried out, the operation temperature is controlled to be 90°C; and when the yarn-shaking operation in the step S3 is carried out, the op-

eration temperature is controlled to be 40°C.

When the brushing operation is carried out within the temper- ature range of the brushing operation in the Examples 3 to 5, the picked silkworm cocoons are good in separation effect, the brush- ing operation is easy, and the phenomenon that the silkworm co- coons are boiled or gelatinized is avoided. When the yarn-shaking operation is carried out within the temperature range of the vyarn- shaking operation in the Examples 3 to 5, the silk thread separa- tion performance of the silkworm cocoons can be effectively con- trolled, and a single-thread end thread can be found conveniently.

Example 6

Based on the real silk and wool composite filament in the Ex- ample 1, the tangent angle in the step S3 is 50°, and the tangent angle is an included angle between the axis of the cocoon silks 2 and the axis of wool yarn 1. The wool yarn 1 to which cooked co- coon silks 2 are adhered in the step S3 is controlled through a tension controller, and the tension of 0.06 g/d is kept in the process that the wool yarn 1 is attached to and wound around a small winding tool. There is a space of 0.05mm between the cooked cocoon silks 2 which are adhered to the wool yarn 1 in a mutual parallel manner in the step S4.

Example 7

Based on the real silk and wool composite filament in the Ex- ample 1, the tangent angle in the step S3 is 30°, and the tangent angle is an included angle between the axis of the cocoon silks 2 and the axis of wool yarn 1. The wool yarn 1 to which cooked co- coon silks 2 are adhered in the step S3 is controlled through a tension controller, and the tension of 0.03 g/d is kept in the process that the wool yarn 1 is attached to and wound around a small winding tool. There is a space of 0.01 mm between the cooked cocoon silks 2 which are adhered to the wool yarn 1 in a mutual parallel manner in the step S4.

Example 8

Based on the real silk and wool composite filament in the Ex- ample 1, the tangent angle in the step 83 is 40°, and the tangent angle is an included angle between the axis of the cocoon silks 2 and the axis of wool yarn 1. The wool yarn 1 to which cooked co-

coon silks 2 are adhered in the step S3 is controlled through a tension controller, and the tension of 0.04 g/d is kept in the process that the wool yarn 1 is attached to and wound around a small winding tool. There is a space of 0.03 mm between the cooked cocoon silks 2 which are adhered to the wool yarn 1 in a mutual parallel manner in the step S4.

By adopting the tangent angle of Examples 6 to 8, the adhe- sion amount of cocoon silks 2 on the surface of wool yarn 1 can be effectively controlled, and stable production efficiency is kept.

By adopting the tension of the wool yarn 1 of the Examples 6 to 8, the wool can be kept straight as much as possible, so that the cocoon silks 2 can generate necessary stress during adhesion, and sericin on the surfaces of the cocoon silks 2 can be firmly adhered to the wool yarn 1. Meanwhile, under the stress, on the basis that the strength of the surface of the wool yarn 1 is not affected, silk thread units on the surface of the wool yarn 1 have generate tiny intervals, so that the sericin of the cocoon silks 2 can permeate easily, and the adhesion firmness of the cocoon silks 2 is further enhanced.

By adopting the intervals between the cocoon silks 2 in the

Examples 6 to 8, the amount of the cocoon silks 2 can be effec- tively controlled, the distribution degree of the cocoon silks 2 on the surface of the wool can be effectively controlled, and the uniformity of the dyeing effect is improved while the characteris- tics of real silk are kept.

Example 9

Based on the real silk and wool composite filament in the Ex- ample 1, when the cooked cocoons adhered to the wool yarn 1 are rotated in the step S4, the cooked cocoons are kept in a hot water environment at the temperature of 45°C.

Example 10

Based on the real silk and wool composite filament in the Ex- ample 1, when the cooked cocoons adhered to the wool yarn 1 are rotated in the step S4, the cooked cocoons are kept in a hot water environment at the temperature of 40°C.

Example 11

Based on the real silk and wool composite filament in the Ex-

ample 1, when the cooked cocoons adhered to the wool yarn 1 are rotated in the step S4, the cooked cocoons are kept in a hot water environment at the temperature of 40°C.

Through studies, the applicant finds that although the sur- face of wool can be wrapped with the cocoon silks 2 at the room temperature, the cocoon silks 2 and the surface of the wool yarn 1 are attached to each other only through physical friction force, certain mutual sliding can still happen in the washing process, and therefore the composite silk deforms. The cocoons are placed in the hot water environment in the Examples 7-9, natural sericin on the surfaces of the cocoon silks 2 can have certain viscidity, and therefore the cocoon silk 2 can be attached to the surface of the wool yarn 1 through a natural sericin layer as shown in the

FIG.3 and can be fixedly adhered with fluff 101 on the surface of the woel yarn 1, thus possibility that the cocoon silks 2 fall off is reduced while mutual sliding between the cocoon silks 2 and the wool yarn 1 is reduced.

Example 12

Based on the real silk and wool composite filament in the Ex- ample 1, the sheath twisting length is 18 cm in the twisting sheath operation in the step S4.

Example 13

Based on the real silk and wool composite filament in the Ex- ample 1, the sheath twisting length is 16 cm in the twisting sheath operation in the step S4.

Example 14

Based on the real silk and wool composite filament in the Ex- ample 1, the sheath twisting length is 15 cm in the twisting sheath operation in the step S4.

Through studies, the applicant finds that for the real silk and wool composite filament of the structure, if the sheath twist- ing length is controlled to be 15-18 cm according to the thickness degree of the real silk and wool composite filament, the effects of effectively dissipating water, enhancing cohesion and removing part of entangled silken knots can be achieved. If the sheath twisting length is too short, the phenomenon that cocoon silks 2 and a wool yarn 1 are separated from each other can be caused.

Example 15

Based on the real silk and wool composite filament in the Ex- ample 1, the first drying in the step S6 comprises the step of drying for 5 seconds under the condition of steam hot air at 120°C; and the second drying in the step S6 comprises the step of placing a small winding tool wound with silk threads in a drying chamber at 120°C to be dried for 5 hours.

Example 16

Based on the real silk and wool composite filament in the Ex- ample 1, the first drying in the step S6 comprises the step of drying for 30 seconds under the condition of steam hot air at 105°C; and the second drying in the step S6 comprises the step of placing a small winding tool wound with silk threads in a drying chamber at 105°C to be dried for 8 hours.

Example 17

Based on the real silk and wool composite filament in the Ex- ample 1, the first drying in the step S6 comprises the step of drying for 15 seconds under the condition of steam hot air at 110°C; and the second drying in the step S6 comprises the step of placing a small winding tool wound with silk threads in a drying chamber at 110°C to be dried for 6 hours.

Through studies, the applicant finds that by adopting a tra- ditional one-time drying technology, the problems that the silk threads on the outer portion of a small winding tool are seriously dehydrated, and therefore hardening, embrittlement, etc. are prone to occurring, the silk threads on the inner portion are not dried enough, the silk threads are adhered with each other, and there- fore stripping is difficult, adhesion of the cocoon silks 2 is not firm, and the cocoon silks 2 shrink in a damp and hot environment to cause wrinkling of the wool yarn 1 are caused. By adopting the technology, the first rapid damp and hot drying can enable the re- al silk and wool composite filament to discharge redundant water, meanwhile, certain flexibility is kept, and therefore the real silk and wool composite filament can be wound on the small winding tool; meanwhile, the cocoon silks 2 and the wool yarn shrink to a certain degree, but the cocoon silks 2 and the wool yarn are for-

cibly flattened in the winding process; the second drying is car- ried out in the dry and hot environment, due to the fact that the silk threads have discharged the redundant water, the second dry- ing mainly plays a role in reducing the moisture regain and reduc- ing the adhesion force, when the silk threads are subjected to winding operation, unwinding can be smoothly carried out in se- quence, and the phenomena of fluffing and cutting off cannot oc- cur; and meanwhile, the wool yarn 1 and the cocoon silks 2 can be shaped, the mutual internal stress is eliminated, the asynchronous shrinkage rate of the cocoon silks 2 and the wool yarn 1 in the drying process of the composite filament is reduced, and the pos- sibility of wrinkling of the composite filament is reduced to the minimum.

Claims

CONCLUSIONS

A real silk and wool composite filament comprising a wool yarn having a central core in a linear or approximately linear arrangement; wherein more than 8 single cocoon sides not overlapping each other are bonded to the outer side wall of the wool yarn; wherein the composite filament contains 25 to 40% cocoon silk.

The pure silk and wool composite filament according to claim 1, wherein the cocoon silk attached to the surface of the wool yarn is bonded to the wool yarn by means of sericin contained in the cocoon silk itself.

The pure silk and wool composite filament according to claim 1, wherein the pure silk and wool composite filament is prepared by a process comprising the following steps:

S1. selecting qualified raw cocoons;

S2. performing cocoon stripping and cocoon selection activities; after stripping cocoon shells of silkworm cocoons, performing cocoon selection, removing inferior cocoons, remnant cocoons and other cocoons not suitable for production; and performing a cooking operation of cocoons on the obtained cocoons to obtain cooked cocoons for later use;

S3. performing brush and yarn shaking treatment on the cooked cocoons, then leading out silk thread ends of cooked cocoon sides and bonding the silk thread ends of more than 2 cooked cocoon sides from different positions at the same tangent angle;

S4. rotating the cocoon sides attached to the wool yarn so that the silk threads of the cooked cocoons are attached parallel to the wool yarn; and performing a sheath twisting operation on the attached silk threads, the sheath twisting length being 15-18 cm;

S5. detecting the thickness of the silk threads after the sheath twisting operation, when the silk threads after the sheath twisting are too thin, replenishing the silk thread ends bonded with new cooked cocoon silk, and continuously performing the rotation attachment and sheath twisting operation in step S4;

S6. performing a first drying on the detected silk threads wound on a small winding tool, then performing a second drying and after the second drying is completed, winding the composite silk wound on the small winding tool on a winding drum for silk; and cutting raw and defective silk threads during winding.

The real silk and wool composite filament according to claim 3, wherein the qualified raw material cocoons in step S1 are raw cocoons having a rollability percentage of greater than 70%, a hanging time of ten thousand meters of less than 2.5 times, and a uniformity of the cocoon width of greater than 753.