JPH0143042B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is directed to producing futons from silk by-products called cocoon cut shells, cocoon fluff, fried cocoons, rawhide grass (kibiso), bisu (bisu), etc. The present invention relates to a method for producing cotton or silk cotton that can be used as filling for skin comforters, throws, jackets, etc.

[Prior Art] No attempt has been made to use silk by-products such as cut cocoon shells, cocoon fluff, fried cocoons, millet, bis, etc., as short fibers for bedding or silk for batting.

[Problems to be solved by the invention] Conventionally, among the by-products produced in each production process such as silkworm seed production, sericulture, and silk reeling, byproducts mainly composed of fibers excluding pupae, that is, in silkworm seed production, shells were Cocoons, cut cocoons, etc. are used for sericulture, jade cocoons, selected cocoons (dead cocoons, dirty cocoons, etc.), cocoon cotton, etc. are used for silk spinning,
Fried cocoons, pupae, millet, bis, etc. are produced as by-products, and these have been used as raw materials for lower-grade raw silk, dupioni, floss, and silk thread, respectively.

Among these, the dupioni from the jade cocoon is called Huanshi yarn, and its woven fabric has market value. In addition, although it is used as low-grade raw silk and as raw material for silk thread spinning, it is necessary to develop more preferable uses to make silk byproducts more value-added. As a result, silk byproducts are flexible, light, heat-retaining, moisture-absorbing, and have appropriate moisture-draining properties. Taking advantage of these characteristics, it is necessary to develop silk cotton for use as futon cotton or batting for cold-weather clothing. it was thought.

[Means for developing the problem] For this reason, the present inventors have developed various methods from silk thread production to sericulture,
Focusing on the silk by-products that can be used as silk fibers produced in each process up to silk spinning, we conduct intensive research to obtain silk cotton suitable for use as filling for cold-weather clothing such as futon cotton, lap blankets, and quilted jackets. As a result of conducting various experiments, we found that mainly the empty cocoons and cut cocoons produced in the silkworm seed production process, the selection of dead cocoons and dirty cocoons produced in the sericulture process, cocoon cotton, and silk-spinning process. The produced fried cocoons, pupae, millet, bis, etc. are used as raw materials, and these are refined to dissolve and remove sericin, and then opened to remove foreign substances such as pupae, and made into laps. shred,
By mixing wool with the shredded short fibers and carding the mixture to make silk, the object can be well achieved, and the present invention has been achieved.

[Example] The silk byproducts used in the present invention include, for example, empty cocoons and cut cocoons produced during silkworm seed production, and selected cocoons such as dead cocoons and dirty cocoons produced during sericulture. , selected cocoons, fried cocoons, which are also produced during silk spinning,
Those produced in the form of cocoons, such as pupae, and those produced in the form of fibers, such as cocoon cotton produced during sericulture, and millet and bis produced during silk reeling. All of these are used as raw materials for silk cotton, which is the object of the present invention.

First, the method of the present invention is listed in order of steps: (1)
It can be divided into a scouring process, (2) opening process, (3) cutting process, (4) blending process, and (5) carding process. To explain this process, in the scouring process, the fibers or scrap raw silk constituting the cocoons in the silk by-products described above are scoured with enzymes or alkalis, and the sericin constituting the fibers is swollen and dissolved to produce sericin. This method removes almost completely the fibroin fibers and converts them into fibroin fibers, and also allows the by-products in the form of waste threads and cocoons to be easily opened.
An example of scouring using alkaline chemicals is as follows:
Dialon (a type of surfactant) was added at a weight ratio of 0.1% as an antistatic agent to a mixed solution of 0.5% each of NaOH, KOH, and NaCO ₃ , and the mixture was immersed in this solution for 12 hours at room temperature. Wash with water and dry. Alternatively, as an example of enzymatic scouring,
A 0.1% solution of NaCO ₃ was heated to 60°C and immersed in this solution for 2 hours.
The sample is immersed in a liquid (weight ratio) heated to 30°C for 24 to 30 hours, then washed with water and dried.

As a result, most of the sericin is removed, resulting in fibroin fibers. The by-products that have passed through this scouring process are transferred to a fiber-opening process, and in this fiber-opening process, the by-products that have already been reduced to just fibers are wrapped, that is, loosened and stretched into a cotton-like form.

Also, most of the by-products in the cocoon state contain foreign matter such as pupae, so these foreign matter must be removed and the cocoon wrapped. For this purpose, a cocoon opening machine or a roving machine should be used. Good. The lap thus obtained in the opening step is transferred to a cutting step, in which the lap is cut into a desired fiber length, for example, about 50 mm to 70 mm, using a cutter to form short fibers in the form of cotton.

The obtained staple fibers are blended with wool in the blending process. It is preferable to use wool that has been washed and steam-dried to remove foreign substances. This cotton blending is carried out using a cotton blending machine, and the ratio of the blended cotton is preferably 6 to 8 cut laps to 4 to 2 parts wool. This blended cotton is carded by a carding machine in the carding process, and the silk and wool fibers are finely scattered and accumulated into a belt shape with countless intertwined fibers of a certain thickness. Silk is obtained by doing this.

The silk cotton obtained in this way can be used in a wide range of applications, such as making it into futon cotton as it is, or quilting it and making it into the filling for cold-weather clothing such as bed covers, skin comforters, lap blankets, and quilted jumpers. Become what you can.

[Effects of the Invention] As explained in detail above, the present invention removes sericin by scouring the silk by-products of silk fibers produced in a wide range of processes from silkworm seed production to sericulture to silk spinning. Since it is mostly fibroin fiber, it becomes an extremely flexible fiber, which is opened to remove foreign substances such as pupae and made into a wrap, which is then cut to make short fibers.
It was mixed with wool and carded to obtain silk, and the resulting silk had many characteristics and advantages. In other words, the silk fibers of the obtained silk wadding are made of fibroin fibers from which sericin has been removed, and their single filament fineness is approximately 2.5D, which is extremely fine, one-fifth to one-tenth that of wool. It is extremely flexible, has many voids within its fibers, has low thermal conductivity, has excellent heat retention, and has appropriate moisture absorption and moisture release properties. .

Silk fibers with these characteristics are considered short fibers, and by blending them with silk fibers, taking advantage of wool's fineness, curl, or hygroscopicity, it can be further improved in bulk and elasticity. For example, when made from futon cotton, it is warmer in winter,
It stays cool in the summer, and you won't feel the discomfort of sweat even when you sleep for a long time.It also has a moderate amount of elasticity, and because the fibers are strong, you won't get tired even if you repeatedly hit the cotton. , it is possible to wash the futon completely, and the silk fiber by-product of silk fiber, which has traditionally been given only low added value and has not been much appreciated, has been given high added value and is now widely used as a luxury product. This is an invention that should be done.

Claims (1)

[Claims] 1. Silk by-products such as cut cocoon shells, cocoon fluff, fried cocoons, rawhide grass (millet), bisu (bisu), etc. are refined to dissolve and remove sericin, and then opened to remove foreign substances such as pupae. A method for producing silk cotton, which comprises removing and lapping the fibers, then shredding the fibers, and carding the shredded staple fibers by mixing wool with them to obtain silk fibers.