Quercus serrata is also known as Chinese Quercus serrata abroad, there are three strains of Chinese, Indian and Japanese species. Quercus serrata grows in the wild on the quercus tree (i.e. oak), China's quercus species are many, the current stocking of varieties of the main one chemical and two chemical two kinds of species. The former is stocked once a year, and the cocoons are used as seed cocoons, which are raw materials for reeling; the latter is stocked twice a year, and the spring cocoons are used as seed cocoons only for the fall cocoons, which are used as raw materials for reeling. Quercus cocoon cocoon type than the mulberry cocoon, its cocoon cocoon to stay in the cocoon on the cocoon stalk to the reeling brought some difficulties.
Silk is the raw material for weaving cocoon silk, decorative silk, and some industrial and national defense silk fabrics, and is generally used for weaving medium-thick silk fabrics. Quercus cocoon silk average fineness of 6.16dtex (5.6 dan), the inner and outer fineness is not the same, the general outer layer of the average fineness of 6.82dtex (6.2 dan), the middle layer of an average of 6.05dtex (5.5 dan), the inner layer of the average fineness of 4.95dtex (4.5 dan), are coarser than the mulberry cocoon. The spring cocoon of sericulture cocoon is light yellow-brown, autumn cocoon is yellow-brown, and the outer layer is darker than the inner layer.
The silk glue content of sericea silk is about 12-15% less than that of mulberry silk, and the cross-section of sericea silk is bluntly triangular. And mulberry silk is basically the same, but more flat, long diameter of about 65um, short diameter of about 12um, the more to the inside of the cocoon, the greater the difference between short and long diameter, the more flat form. Monofilament is composed of many fine fibers gathered, there is a certain gap between the fibers, located in the center of the gap is larger, * near the surface of the fibers are finer, conducive to aeration and moisture absorption. Quercus serrata silk contains trace amounts of tannins, which are chemically bound to silk glue or silk prion. Silk prion also contains pigment inside and outside, these impurities are very difficult to remove in the processing.
(2) silk
In daily life, people often use "rare as expensive" to describe rare items, with this idiom to describe the silk is the most appropriate. Days silk is rare, expensive, in the international market per kilogram price of up to 3,000 to 5,000 U.S. dollars, higher than the mulberry silk, quercus serrata silk nearly a hundred times, the economic benefits are staggering.
The silkworm is also known as "Japanese silkworm", "mountain silkworm". It is a kind of life in the natural serpentine forest spitting cocoon of a chemically born four sleep five age completely metamorphosed insects, to the egg overwintering. The morphology of the larvae is similar to that of Quercus serrata, which can only be distinguished by the fact that Quercus serrata larvae have a black spot on their head, while Tengzhi silkworms do not have a black spot. The larvae of the day silkworm body is green, multi-tumor-like protuberance, by bristles, eating beech oak leaves on the wild silkworms, belonging to a member of the family of silkworms, it is suitable for growth in the warmer temperatures and semi-moist areas, but also adapted to the cold climate, can be in the 44 degrees north latitude north of the cold zone of natural habitats. Mainly produced in China, Japan, North Korea and Russia's Ussuri and other regions.
The silk is a kind of wild silk that can keep its natural green color without dyeing. Its unique light green gem-like luster and high strength tensile strength, toughness, often known as "fiber diamonds", "green gold" and "fiber queen". Its economic value is very high, generally 30 times higher than the mulberry silk, 50 times higher than the quercus silk. Its fiber is slightly coarser than mulberry silk, about the same as quercus silk. Due to the extremely low production, only in the mulberry silk fabrics to add some, as embellishment, used to make clothing fabrics, elegant and solemn jewelry and embroidery, is the Japanese market and Southeast Asian markets are in demand.
Ten silk properties:
Ten silk silk silk gel content than mulberry silk and quercus silk, about 30%, silk pigment content of about 70%. Foreign use of Marseille soap 15%, 2% soda ash, oil 0.5%, bath ratio 1/45, at 100 ℃ under the refining 2.5 hours, the practice of tencel silk fabrics glittering with a favorite fruit green jewel light. Dyeing, direct dyes or acid dyes can not make the silk dyeing, but with part of the screened metal complex dyes, salt-based dyes and reactive dyes, after a long time of dyeing, can make it on the dyeing.
Ten silk fibers are fine (average fineness 5.5-6.6dtex), but the thickness varies greatly. Fiber cross-section of a flat polygonal triangle, as the structure of the diamond, with a strong refractive properties, the light is like a glittering gem glow, fascinating. Once the silkworm matures, the body will show a bright green light, so internationally known as the "green diamond".
The length of the silk of the silkworm is 90-600m, the silk rate is 50%-60%, and the amount of silk produced from 1000 cocoons is about 250g. Strength 31.2cN/tex, elongation at about 40%. Tencel silk glossy, bright color, light and soft texture, with strong tension and toughness, quality better than mulberry silk and quercus silk, and no creases, without dyeing to maintain the natural emerald color, so enjoy the "diamond fiber" and "gold silk" of the name, is a precious silk resources. The use of silk made of night dress, mainly by the royal family and aristocrats use, in the light of the lamp as if the beads full of body, so that the wearer looks extraordinarily elegant and noble, the value of a hundred times, symbolizing the wearer's wealth and status.
(3) natural color cocoons
With the development of colored cotton, natural color cocoons also came into being. As early as in the early 1950s, Guangdong Province had bred over polychemical cocoons is yellow, but due to the thin cocoon layer, silk coarse, low quality and was eliminated. Tongxiang, Zhejiang Province, to try to raise colored cocoons have been successful, this batch of summer cocoon production and white cocoons are not comparable, reeling silk quality has reached more than A grade. Tongxiang is the national cocoon production in one of the counties and cities, its cocoon industry output value accounted for about 30% of the total value of agricultural output. Zhejiang Huashen Silk Group Company, Tongxiang Silkworm Cocoon Management Terminal and Zhejiang College of Animal Science Silkworm and Bee Department formally signed a contract to carry out large-scale production of natural colored silk, research and development. According to Zhejiang University to develop natural colored silk project leader Chen Yuyin, the research and development of natural colored silk products at home and abroad for the first time, which has the advantage of environmental protection decided that it has a good market prospects.
Anhui Provincial Academy of Agricultural Sciences Sericulture Research Institute and the provincial silk company joint research, the development of silkworm natural color cocoon technology has recently been successful, they use in artificial feed or mulberry leaves to add treated pigmented feed to feed silkworms, so that cocoons become colorful.
Sichuan Chengdu Huashen Group resources insect biotechnology center using biogenetic technology to produce new silkworm species, so that the white silkworm can spit out colorful colored silk. According to reports, this technology is mainly * domestic silkworm mutant genes, gene positioning, the use of chromosome technology to the need for gene combinations into the body of the domestic silkworm, so as to cultivate can spit out colorful silk of the new species of silkworms
(4) Castor Silk
Castor Silkworms, also known as Indian silkworms, is a variety of silkworms. It was originally a wild growth of wild silkworms, eating castor leaves, but also cassava leaves, crane wood leaves, stinking toad leaves, horse pine leaves and mountain umber leaves, is a highly adaptable polyphagous silkworm. It is now grown in the wild and stocked by hand, and also indoors by hand.
The cocoon made by castor silkworms is pointed and thin at both ends, shaped like a date palm, expanded in the middle, with unequal widths on both sides of the girdle, or irregular triangular shape, with a closed tail and a small hole in the head.
The castor worm is best suited to grow in the hot climate, humid and rainy summer. It is native to the Assam forest in northeastern India, so it is also known as the Indian silkworm.
The cocoon coat of the castor worm is thick and numerous. About 1/3 of the amount of cocoon layer. cocoon layer is soft, lack of elasticity, thick and thin tight differences, the outer layer is loose like cotton, and cocoon coat without obvious boundaries, the level of the middle layer, the inner layer is tight, hand pinch rebound sound. Cocoon layer is thin, and there is obvious layering, mostly layer cocoon, the outer layer of shrinkage wrinkles slightly fuzzy, the middle layer is obvious, the inner layer is flat. Cocoon thickness is also inconsistent, the central part of the thickest, followed by the tail, the head of the thinnest, and sparse with a small hole out of E. In the weight of the fresh cocoon, cocoon coat accounts for about 3.6%, cocoon layer accounts for about 10%, the pupal body accounts for about 86.5%.
The cocoon is white, but the luster is not as bright as the mulberry cocoon, can not reeling, can only be used as raw materials for silk spinning.
The castor silk section shape is similar to the mulberry silk, but more flat than mulberry silk. It contains about 7% -12% of the amount of silk glue, silk pigment is about 85% -92, impurities of about 1.5% -4.0%. Silk fineness of about 1.65-3.3dtex (1.5-3.0 denier), strength is lower than mulberry silk, elongation at break and acid resistance and mulberry silk is close to the alkali resistance is slightly stronger than the mulberry silk, suitable for spinning 6.25 (160 counts) sergeon
Difference: a good color of the silk is relatively white, should be glossy and elastic, yellow and brittle is either old, or very poor quality!
Market price:
Said to be warm in winter and cool in summer. But it can't be washed and is a disposable product. The ones in the mall are too rip-off, and the ones in Aptar are not insured, I suggest you go to the supermarket. Or buy mall specials. I've bought a silk quilt for 470, a cotton quilt for 160, and yesterday I bought 2 9-hole quilts from Wumi for 99 (special price).
Australian millennium 2 pounds, 50% off 330 yuan (about that price), twill outer cover. The Wumi hypermarket used to have the Natural Sanwa for 299 yuan for 4 pounds, except the outer cover was plaincloth, so it was cheaper. However, twill or plain doesn't matter, we're going to use it over the cover anyway
It's so hard to find!!!! How about 80 points