CATDOLL : CATDOLL: What is the use of silk from silkworms?

1. How to use silk?

Silk can be made into quilts, clothing, cosmetics, health care products, etc.

Silk is a continuous long fiber formed by the coagulation of silk fluid secreted by mature silkworms when they make cocoons. It is also called natural silk and is a natural fiber. Silk, as the fibroin and sericin that constitute the silk component, has anticoagulant activity and the effect of delaying blood coagulation time. It can be used to develop blood test equipment or anti-thrombotic materials. It can also be used as an additive for cosmetics or health foods.

2. What is the use of silk produced by silkworms?

The uses of silk include:

1. Silk can be made into quilts, clothing, cosmetics, health care products, etc.

2. Silk is a continuous long fiber formed by the coagulation of silk fluid secreted by mature silkworms when they make cocoons. It is also called natural silk and is a natural fiber. Silk, as the silk fibroin and sericin that constitute the silk component, has anticoagulant activity and the effect of delaying blood coagulation time. It can be used to develop blood test equipment or anti-thrombotic materials. It can also be used as an additive for cosmetics or health foods.

3. Quilts and clothing: Silk is the lightest, softest and finest natural fiber in nature. It can easily return to its original shape after the external force is removed. The inner tube does not cake, does not feel stuffy, does not shrink, is uniform and soft, and can be used permanently without turning over. Silk quilts are made of high-quality silk with a novel fiber structure that allows water vapor to flow freely.

4. Combined with the unique air permeability and moisture permeability of silk itself, silk quilts feel smoother, cool but not cold, warm but not dry. Mulberry silk is mainly composed of animal protein, rich in 18 kinds of amino acids necessary for the human body, can promote the vitality of skin cells, prevent vascular sclerosis, long-term use can prevent skin aging, has a special antipruritic effect on certain skin diseases, and has a certain health care effect on arthritis, periarthritis of shoulder, and asthma. It is known as the "second skin of the human body" and the "Queen of Fiber".

3. What is the use of raising silkworms?

Silkworms are a common animal in our daily life. So what exactly are their functions?

1. Silk becomes one of the raw materials for making silk.

2. Silk can be made into silk quilts with antibacterial and anti-allergic effects.

3. Silkworm feces can be made into silkworm feces pillows which can regulate sleep, calm the nerves and lower blood pressure.

4. Silkworm feces can be used as a traditional Chinese medicine to eliminate rheumatism.

5. The skin of silkworm molt can also be added to traditional Chinese medicine.

6. Silkworm pupae can be served on the table as a delicacy with a relatively high protein content.

The above are the benefits that silkworms can play in our daily lives. It can be seen that silkworms are animals that are beneficial to humans.

4. What is silk used for?

The uses of silk are as follows:

In the industrial field, silk powder processed into microparticles can be used as an additive for cosmetics or health foods, and can also be made into silk paper containing silk powder or packaging materials for food preservation and silk materials with antibacterial properties. In addition to being used to process contact lenses, silk film can also be mixed with resin to develop a new product called "silk leather". The high-grade paint made by mixing silk powder into certain coatings is used to spray furniture and supplies, which can increase the elegance of the appearance and good touch of the objects, and is widely used in various interior decorations.

Medical field: Silk and sericin, which are components of silk, can be treated with concentrated sulfuric acid to obtain substances similar to heparin, which have anticoagulant activity and slow blood coagulation time, and can be used to develop blood test equipment or anti-thrombotic materials. By changing some processing conditions in the same way, silk with rich water absorption and water retention properties can be processed into high-grade water-based materials or other physiological health products. In addition, by treating silk with polymer chemical synthesis to make calcium or phosphorus coagulate with silk, "bone setting materials" for orthopedic treatment can be developed. Similarly, after chemical treatment, artificial muscles or artificial ligaments can also be developed. Silk film made of silk can also be made into wound protection film for treating burns or other skin injuries.

The structure of natural silk is very similar to human skin, so it is also known as the "second skin" of the human body. Silk beauty has a long history in China. As early as the Ming Dynasty, silk was used by imperial concubines in the palace for daily beauty and health care due to its important medicinal value. According to the Compendium of Materia Medica, silk protein powder can eliminate skin spots and treat suppurative dermatitis. Modern medical experiments have further proved that the protein content of silk is much higher than that of pearls, with a nitrogen content 37 times higher than that of pearls, and a main amino acid content of more than 10 times. These amino acids can be directly absorbed and adsorbed by human hair and skin. That is, it is easier to penetrate the outer layer of the human epidermis and accelerate the metabolism of the skin.

Silk amino acids can also effectively inhibit the formation of melanin in the skin. Since 2000, with the advocacy of returning to nature and returning to the green revolution, silk has attracted more and more attention and popularity. From expensive silk quilts to silk pillows, silk underwear, to silk medical sutures and silk protein artificial skin in the medical field, the role of silk is becoming more and more important.

Silk, which is mainly composed of protein, not only plays its high-quality fiber function in the field of clothing, but also develops various new functional materials through various chemical or physical treatment methods, broadening the new uses of silk.

Natural silk fabric mask leads the new beauty trend.

5. What are the characteristics and uses of silk in primary school?

Silk is a continuous long fiber solidified by the silk liquid secreted by mature silkworms when they make cocoons, also known as "natural silk". Like wool, it is one of the earliest animal fibers used by humans. According to different foods, it is divided into mulberry silkworms, tussah silkworms, cassava silkworms, camphor silkworms, willow silkworms and natural silkworms. The silk strips extracted from a single cocoon are called cocoon silk, which is made of two single fibers bonded and coated with sericin. The silk strips formed by extracting the cocoon silk from several cocoons and bonding and wrapping them with sericin are divided into mulberry silk (also called raw silk) and tussah silk, collectively known as silk. The silk without sericin is called refined silk. Using them as raw materials, they can be processed into various types of fabrics on a loom. Blank sweatshirt silk fiber is composed of two triangular or semi-elliptical silk fibroin wrapped with sericin, and the cross-section is elliptical. Silk fiber is a protein fiber, and sericin and fibroin are its main components, of which fibroin accounts for about 3/4 and sericin accounts for about 1/4. Sericin and fibroin are composed of 18 kinds of amino acids, containing about 97% pure protein. Sericin is a globular protein with good water solubility. Dissolving silk in hot water for degumming and refining is to take advantage of this property of sericin. Due to the different amino acid compositions of sericin and fibroin, fibroin is fibroin and sericin is globulin. The total length of silk spun by silkworms can reach more than 1,000 meters. I. Characteristics of mulberry silk (I) Physical properties of mulberry silk 1. Silk is soft and elastic to the touch. After refining and degumming, the surface of the silk is smooth, uniform, bright and elegant. Silk is a porous protein fiber with good moisture absorption and moisture dissipation properties and air-containing and breathable properties. The limbs are soft and comfortable, with a unique "silk sound" feature. 2. Silk has high tensile strength, with a breaking strength of 3.1~3.6dN/tex (3.50~4.09gf/denier) and a breaking elongation of 15~25%; the shear strength per unit cross-sectional area reaches 432.1~471.4N/mm2 (44~48kgf/mm2), which is close to that of steel wire. Silk has better wear resistance than other natural fibers, and the wrapping force of 22.2/24.42dtex (20/22 denier) 4A family planning silk is about 80 times. 3. Silk has good heat resistance, and its decomposition point is about 150℃. At the same time, silk has good warmth retention, and it feels warm in winter and cool in summer when worn. 4. Silk has good insulation performance and is a poor conductor of electricity, but when the moisture regain is high, it will reduce resistance and reduce insulation performance. Under normal circumstances, the moisture regain of silk fiber is 8%~14%. 5. Silk has good dyeing properties. It can be dyed with direct dyes, acid dyes, reactive dyes and various mordants. Alkaline dyes need to be dyed with protective agents. The dyeing effect is beautiful, bright and delicate. 6. Silk is more resistant to acid than cotton and weaker than wool. With the increase of concentration and temperature, the silk fiber stops swelling and dissolves. Caustic alkali can dissolve sericin and damage silk even at low temperatures. 7. Silk in silk can absorb certain metals (such as tin). This property can be used to increase the volume and wrinkle resistance of silk. Silk can also be treated by methods such as sericin fixation to obtain unique new silk materials for making certain clothing accessories and summer clothing. 8. The defect of silk fiber is that long-term storage or exposure to the sun can easily cause yellowing and embrittlement. Silk fabrics are also prone to fade after washing and then exposed to the sun. Some microorganisms can discolor silk and affect the quality of silk fabrics. In addition, the fiber's wear properties such as friction strength, flexural strength, and elongation fatigue are not as good as synthetic fibers. (II) Characteristics of mulberry silk 1. Comfort. Silk is composed of protein fibers, which have excellent biocompatibility with the human body. In addition, its smooth surface has the lowest friction irritation coefficient on the human body among all kinds of fibers, which is only 7.4%. Therefore, when our delicate skin meets the smooth and delicate silk, it, with its unique soft texture, follows the curves of the human body and cares for every inch of our skin considerately and safely. 2. Good moisture absorption and release. Silk protein fibers are enriched with many hydrophilic groups such as amine groups (-CHNH) and amino groups (-NH2). Because of its porosity, it is easy for water molecules to diffuse, so it can absorb or emit moisture in the air and maintain a certain amount of moisture. At normal temperature, it can help the skin retain a certain amount of moisture and prevent the skin from being too dry; when worn in summer, it can quickly dissipate the sweat and heat discharged by the human body, making people feel extremely cool. It is precisely because of this property that silk fabrics are more suitable for direct contact with human skin. Therefore, people regard silk clothing as one of the necessary summer clothes. Silk not only has good heat dissipation performance, but also has good warmth retention. Its heat retention is due to its porous fiber structure. There are many extremely fine fibers in a silk fiber, and these fine fibers are composed of even finer fibers. Therefore, more than 38% of the seemingly solid silk is actually hollow. There is a large amount of air in these gaps, which prevents the heat from dissipating, making silk have good warmth retention. 3. Sound absorption, dust absorption, and heat resistance. Silk fabrics have a high porosity, so they have good sound absorption and air absorption. Therefore, in addition to making clothes, they can also be used for interior decoration, such as silk carpets, tapestries, curtains, wall coverings, etc. Decorating the room with silk decorations can not only make the house dust-free, but also keep the room quiet. Because silk has moisture absorption and moisture release properties, as well as moisture retention, air absorption and porosity, it can also adjust the indoor temperature and humidity, and can absorb harmful gases, dust, and microorganisms. In addition, silk fibers have low thermal denaturation and are relatively heat-resistant. When it is heated to 100℃, only about 5~8% of it becomes brittle, while the thermal deformation of most synthetic fibers is 4~5 times greater than that of silk. The burning temperature of silk is 300~400℃, which is a flame-retardant fiber, while the burning temperature of synthetic fibers is 200~2600C, which is flammable and fusible. Therefore, using silk fiber as a raw material for interior decoration can not only play a role in sound absorption, dust absorption, and heat preservation, but also have a flame retardant function. 4. Anti-ultraviolet. Tryptophan and tyrosine in silk protein can absorb ultraviolet rays, so silk has a good anti-ultraviolet function. Ultraviolet rays are very harmful to human skin. Of course, after absorbing ultraviolet rays, silk will undergo chemical changes, which will make silk fabrics easy to turn yellow under sunlight.

6. What can be done with silk from silkworms?

The silkworm will not stop spinning silk until it dies, and the candle will not stop shedding tears until it turns into ashes.

Silk is a continuous long fiber formed by the silk fluid secreted by mature silkworms when they make cocoons, also known as "natural silk". Silk can be processed into silk fabrics. Silk has always been a high-quality fabric since ancient times.

In addition, silk, which is mainly composed of protein, not only plays its high-quality fiber function in the field of clothing, but also develops various new functional materials through various chemical or physical treatment methods, broadening the new uses of silk.

1. Application of silk in medical field

Silk fibroin and sericin, which are components of silk, can be treated with concentrated sulfuric acid to produce a substance similar to heparin. This substance has anticoagulant activity and can delay blood clotting time, and can be used to develop blood test equipment or anti-thrombotic materials.

By changing some processing conditions in the same way, silk with rich water absorption and water retention properties can be processed into high-grade water-based materials or other physiological health products.

By treating silk with polymer chemical synthesis to make calcium or phosphorus coagulate with silk, it is possible to develop "bone setting materials" for orthopedic treatment. Similarly, after chemical treatment, artificial muscles or artificial ligaments can also be developed.

Silk membrane made from silk can also be made into wound protective membrane for treating burns or other skin injuries.

2. Application in the silk industry

Silk powder processed into microparticles can be used as an additive for cosmetics or health foods, as well as made into silk paper containing silk powder or packaging materials for food preservation and silk materials with antibacterial properties.

In addition to being used to process contact lenses, silk film can also be mixed with silk powder as fine as 0.3μm and resin to develop a new product called "silk leather".

The high-grade paint made by mixing silk powder into certain paints can be used to spray furniture. It can make the objects more elegant in appearance and feel good to the touch, and is widely used in various interior decorations.

3. Natural silk mask

The structure of natural silk is very similar to human skin, so it is also known as the "second skin" of the human body. Silk cosmetics developed with silk as raw material have become the first choice for skin care for countless beauty-loving women.