What kind of fabrication of UV clothing is better

sunlight includes different bands such as visible light, ultraviolet rays (UV), and infrared. Among them, the light of 100-400 nanometer wavelength is ultraviolet rays.UV spectrals are divided into three bands of UVA, UVB, and UVC. Among them, UVA and UVB have the greatest harm to the human body. In short, UVA takes you black and causes a large amount of melanin to settle in the epidermis layer.UVB can penetrate the epidermis, and long -term exposure will cause genetic factor DNA damage, leading to Skin cancer, which accounts for 6.1%of the sunlight.

Polyester fabric clothes have the best effects, which is related to the benzene ring in the structure of polyester fiber molecules. The role of clothes such as cotton, silk, nylon, and adhesive fabrics is poor.Polyester fabrics have a good absorption and reflection effect on ultraviolet rays. They have strong shielding. The passage of ultraviolet rays is less than 3 %, and the ultraviolet prevention rate is still more than 85 %.In addition, the deeper the color, the better the resistance of UV is better. Black, hidden blue, dark green is better than ultraviolet -resistant performance than light blue, light pink, light yellow.The darker the color of the fabric, the smaller the ultraviolet transmission rate.The closer the fabric of the clothes, the stronger the lighting ability, and the less UV rays.Outline prevention of weaving fabrics is better than knitted fabrics.

The working principle of sunscreen

The principle of sunscreen is to use ultraviolet absorbers in mixed fabrics to absorb high -energy ultraviolet rays to transform it to low energy and turn into low -energy thermal energy or electromagnetic waves with short wavelengths, thereby eliminating the harm of ultraviolet rays to human and fabrics.It also uses ultraviolet reflexes to increase the reflection and scattering effects of fabrics on ultraviolet rays to prevent the fabric through fabrics.It has the performance of heatstroke, heat insulation, and cool touch.

It should be noted that the national standards stipulate that UPF & LT; 30, UVA transmission rate & gt; 5%of fabrics cannot be called sunscreen products.Sun protection clothing fabrics include fabrics such as cotton, hemp, silk, hair, chemical fiber, etc. Some of the anti-ultraviolet fabrics compiled by better process have good absorption, conversion, reflection, and scattered ultraviolet rays in the 180-400Nm band.The fabric is non -toxic, no irritation to the Skin, and the human body does not have an allergic reaction, and does not affect the color of the fabric and the performance of hygroscopic vapor.Good anti-ultraviolet fabrics have a good absorption effect on ultraviolet rays of 100-400cm bands, especially UV-A and UV-B. After washing 50 times, the UV transposition is still lower than 1 %.The highest level.

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[Sleeid] What is the requirements of a sleigh?

What is a sled

The sled originated from Northern Europe, also known as the Nordic sled.On February 12, 1883, Swiss Peter Minsch and Australians George Robertson joined forces to conduct a "great international sled game". They took 9 minutes and 15 seconds to pass 4 kilometers in Davos, Switzerland, 4 kilometers.Circuit.Subsequently, this movement rose rapidly in Switzerland, Austria, Germany, Italy, and the United States.Mattis, a mechanical expert in the Moritz region of Switzerland in 1887, designed and produced the world's first sled.Since the 1950s, with the rise of the rudder's sled, the sled has gradually been eliminated.When the sled is sliding, the athlete's head is in front, lying down on the sled, and using the anti -skid nails installed in the front of the special leather boots to control the movement direction or braking of the sled.In 1928 and 1948, it was listed as the winter Olympic Games.In the current sled game, the speed of the player can reach 140 kilometers or larger per hour, and its centrifugal force exceeds 5G.

Requirement for a sled game

Ruddy Slesles Competition Rules

The weight of a single seat is not allowed to exceed 20 kilograms, and the two -seat is not allowed to exceed 22 kg.The game is divided into men's single seats, men's doubles, and women's single -seater.The competition facility is a slide -like slide based on concrete or wood.The width of the road is 1.30 to 1.50 meters, and the walls on both sides of the slide need to be watered.The length of the competition line is 1000 to 1400 meters and the women are 800 to 1200 meters.There are 11 to 18 corners in the whole journey, and the radius of the curve is 8 meters.The average slope of the slide road is the same, 4 ~ 10 .The height difference between the starting point and the end point is 70 to 130 meters.During the game, the athletes sat on the sled, and pushed back with their hands with the help of the starting point, so that the sleds were starting forward. They were lying on the sled in the sled, pulling the sled Belt with one hand, using the body to stand up with the body, change the shoulder and leg posture to manipulate the sled.Make it quickly dropped along the ice road.At the end of the time, the athletes must sit on the sleigh, otherwise the results will not be calculated.The single -seat is 4 times, the match period is two days; the two -seater slide 2 times, and the match period is one day.Those who have little time will win.When the results are equal, the best performance in each slip is won.The departure order is determined by the lottery!

There are rudder sled competition rules

There are no rudder sleds in the two seats that must not exceed 2.70 meters, 0.67 meters wide, and 8 mm width of the panel; 4 people have a maximum of 3.80 meters long, 0.67 meters wide, and the smallest width of the boat board is 12 mm.When the two people have a rudder sleigh, the total weight must not exceed 375 kg. The total weight of the rudder sled in the 4 -seater shall not exceed 630 kg.The slider is 1435 meters in length, the average slope is 4 30 , and the maximum slope is 8 30 .The radius of the curve must be more than 20 meters, and the slide wall must not be less than 50 cm.The competition is divided into two -seater and four -seater.The scores are calculated 4 times in each game, and the results are calculated at 4 cumulative time.When the total time of the two teams is equal, the team with the least time will win!

Two days during the game, twice a day.The first round of departure is determined by the lottery.From the second round, the order of departure starts from the last one in the previous round, and then goes down.Before departure, the sled is 15 meters from the starting point.After the departure signal was issued, the athletes pushed the sled at the starting point and started to start the sled, and then jumped into the seat.To reach the maximum speed before the sled.The operator finally jumped into the braking.All 4 players must be seated in about 6 seconds.During the game, the three players shrink their heads as much as possible, and all players poured their bodies on the corner.At the end of the end, the athletes must be on the seat, otherwise the results are invalid.The maximum speed of the rudder can reach 135 kilometers per hour, and the highest speed can reach 150 kilometers per hour!

There are rudder sled clothing, and athletes wearable include competition uniforms, shoulders, elbows, helmets and special nails.Boot nails are brushed and evenly distributed on the bottom of the boots.The length of the boots is not more than 14 mm, and the interval is not more than 3 cm!

How about Da Yiwa fishing rod

Dayi Watt began in Japan in 1945. The well -known (famous) Fishing gear brand, Da Yifa's superb skills have always been known in the industry. It is the first brand in the world to add graphite to the fishing wheel. In 1965The aerospace technology engineering has joined the fishing Ship, and the waterproof and dustproof are first -class and excellent!

The Fishing gear produced by Dayiwa is regarded by the vast number of fishing enthusiasts around the world as the best of the dream. sales outlets and production plants are all over the world.Gentle and other.

How to choose a fishing rod

1. The carbon content of the fishing rod

How much talca rods are marked with T, 24T, 30T, or even 45T, etc. In short, it is carbon content. The higher the number, the higher the carbon content.EssenceThe higher the T value, the lighter and straight the fishing rod, but more brittle.Therefore, other materials need to be added during the production process of the fishing rod to enhance the elasticity and toughness of the fishing rod.Other materials are put in a lot, and the Fishing rods must be soft and heavy, so choosing a fishing rod is not suitable for high carbon seats.

2. The tone of the fishing rod

The tone of the fishing rod is whether the pole we usually say is soft or hard. In popular terms, it is where the fishing rod is bent. The closer the distance is, the harder it is.According to the description of the tonnage of the carbon cloth above, the harder the Fish rod should be, the greater.However, the choice of Fishing rods depends on the water environment and fishing species. Generally speaking, fishing fish and small fish are the best. The most classic is black pits. You must use a hard pole.

3. The feel of the fishing rod

Choosing a fishing rod is not as lighter and better, it feels light in your hand.The center of gravity is low.Therefore, in order to be strong, some Fishing rods will be made of solid. This kind of fishing rod fishing is still very suitable.

True and false disagreement method of Da Yiwa Fish rod

1. The gap between high imitation Fishing rods and genuine Fishing rods is very large. Generally, imitation goods appear on high -end products. High -end products are often made of high -tonnage carbon cloth.Secondly, the high -tonnage carbon cloth (Japan is limited to high -tonnage carbon cloth exports), so it is often used with low -tonnage carbon cloth charging, which causes the imitation goods to be poor, and also causes the imitation goods to lack the waist force during the fishing process.Although the brand factors also occupy a considerable part of the price of Fishing rods, the real fishermen, especially those who are engaged in competitive fishing, choose the fishing rod to choose from the actual performance of the fishing rod.

2. Pay attention to observe whether there are scratches on the body of the rod, and then touch it on the fishing rod with your hands to check whether there is a drum or concave place in the fishing rod.This inspection is the key to the quality of the fishing rod, must not be sloppy.If you find this kind of drums or recessed Fishing rods in a brand, it should be included in its own blacklist within a certain period of time, because it has a defect in craftsmanship and should be unqualified products.

3. Check the interface, extend each fishing rod, and then check the gap between each interface. The gap at the interface should be within 20 wires.Choose this kind of pole again.

4. Understand the back of the fishing rod and take out each fishing rod one by one. First, observe the two ends of each section to observe whether the wall thickness is uniform. If the thin thickness is uneven, then you must be sorry.Then check the inner wall of the fishing rod on the backlight. The inner wall must be glory. The interface of the rolling is not seen. If the interface or stubble occurs, you should immediately abandon these poles.

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How to fish for high temperature days

one, fishing deep -water zone

Most fish are warmed animals, and they are warm and oxygen. They always like to stay in the most comfortable water body in water temperature.In high temperature in summer, the water temperature in the deep water areas is relatively low, and the fish groups generally hide in the deep water area to avoid summer heat.Therefore, in high temperature weather, you should try to catch the deep water area as much as possible.

two, Cowardly

There are large trees or bridges, such as large trees or bridges near the waters, and the water body covered by shade shade is relatively cool. fish group likes to gather in these locations. In the shade, it can often get better fishing effects.

three, fishing area

Many water inlets in the waters often form a deep pool due to the difference in water level. The water temperature here is relatively comfortable, the oxygen content in the water is sufficient, and there are more foods rushing upstream. It is a area with more fish.If you fish in such locations, it is likely to have a good harvest.

Four, bait flavor

In high temperature in summer, most freshwater fish like to eat slightly sour gravi or fruity foods. This is the food habit of fish in summer. The higher the temperature, the more you like to eat vegetarian food.Typical odors, while sour food helps digestion.The rich and fragrant fruit acid is a high -quality organic acid extracted from natural fruits. It is scientifically allocated into free acids through fish laboratory, which is the fruity acid that really has a effect on fishing.The food promotion effect in high temperature weather is significantly better than traditional fruit acid, and it also has a good fish -induced effect.

precautions for fishing in high temperature weather

1. fishing early fishing late, not fishing at noon

fishing in summer, paying attention to the morning or fishing. In the morning and evening of the day, the temperature is relatively low, and the fish is relatively easy to fish.But at noon, the scorching sun is empty, and the temperature and water temperature have reached the highest on the day. " summer fishing " It is also difficult to catch.At this time, it is not advisable to fish against the scorching sun. You should rest for a rest. 6 fishing after a minute.So if it is not rainy weather in summer, it is often morning. 11 You have to collect the pole before ordering, or afternoon 4 As well as 5 Click on the door to play wild fishing.

2. fishing in the wind and rain, not calm

fishing in summer, the wind is first.Insufficient oxygen in the weather without wind, the fish will float to the areas with more sufficient dissolved oxygen in the middle and upper layer, so it will be difficult to catch a lot, or even the mouth.If wind is windy, it will increase oxygen in the water and reduce water temperature, so it is best to catch wind, especially north wind, northeast wind, and northwest wind. Such wind direction is an excellent weather in summer fishing;The summer rainy days can still be caught throughout the day. Because of the weak light, sufficient dissolved oxygen in the water, the water temperature is cool, the activity of the fish is much higher than other weather, the eating time becomes longer, and dare to find food in shallow water.

But pay attention not to catch grass in summer in summer, because there is no grass when it rains " Lighter " The district, light and rainy, the water surface is cool, and the amount of soluble oxygen increases. At this time, the water live fish, and the fish is easy to bite.The dense grass gap is the opposite. Because the grass is covered with the water surface, the more the air -conditioning of the atmospheric circulation of the atmospheric circulation will be pressed, and the more the heat covered by the grass will be emitted, but it is covered by water plants.Slowly, the steam circulating hot water area was formed under the continuous water plants.In this way, the fish feels as suffocating and uncomfortable.

1. ChildrenWhat are the Ski jackets

1. Skiper

The technical movements of skiing are mainly done by feet. Children's skiing needs a good pair of Ski boots.Beginners should choose light, flexible, elastic, warm -keeping and waterproof Ski boots. Its room for manipulation is large.It is best to choose low boots with lower boots, so as not to affect the ankle flexion.Generally, according to the shoe code that children usually wear, they must consider a large size when choosing snow shoes, because children still wear thick skiing socks.Let your child try your shoes and then buy it. The toes should not feel too tight in the boots, and be able to move freely.Skiper is different from ordinary shoes and has angles, so when testing shoes, you must stand in a skiing posture.The knee is slightly flexed, and the calves are flattened in the direction of the shoes. Generally speaking, if you feel that the tip of the shoe is about 0 or 5 cm, then these shoes are the most suitable.

2. skiing mirror

The snow is too bright and has a certain impact on vision.Ski mirrors can protect children's delicate eyes from cold wind and ultraviolet rays.Select the Ski mirror that is fully closed and closely fits the child's face.It should be noted that children's nose bridge is generally low, which requires special nasal pads to raise the bridge of the nose to make the snow mirror wears.

It is recommended to choose a double -layer snow -proof and ultraviolet snow lens.The mirror surface is made of colored materials with anti -fog and ultraviolet coating.This material is very soft, and the twisted twisted only deforms without broken, so as to ensure that the mirror surface will not cause damage to the face when it is impacted.

3. Ski helmet

The head is a very fragile part. If you fall at a certain speed when skiing, because inertia will easily reach the head, there is no helmet's protection, the consequences will be unimaginable.Please select a helmet that can cover your ears and buckle skiing glasses straps outside.

4. ski gloves

Children's ski gloves can not only keep warm when skiing, but also protect the hands. When the child falls or collides, gloves can reduce the body's abrasion.ski gloves should be wide, and five fingers should be separated for easy operation.Not only should it keep warm, waterproof, cold, but also soft, wear -resistant, and cut -cut injuries.It's best to have a small dark bag on the back of the hand, which can put the small card in and out of the snow field

5. Protect your face

When skiing, the wind cuts the face like a knife, and puts on the face to block the wind.

2. How to buy children's ski clothes

1. Pay attention to the purchase of children's skiwear. Pay attention to the style: conjoined and split style.The conjoined body is relatively loose, and it is easy to wear and take off. The waist does not leak wind. It is not easy to drill into the clothes in the snow.Most adult skiers believe that wearing skiwear is convenient to slide when skiing clothing.Children's skiing clothes are more suitable for the baby to go to the toilet by themselves, but it is slightly worse in warmth.If you want to choose the style of the split body, you can choose a wind -proof snow -proof skirt design, which will increase the warmth of the clothes to a certain extent.Even if it fell, Xue was not easy to run into the clothes.In addition, you can choose a strap pants style Ski suit.The pants will not fall because of the baby's activities, and it can also protect the baby's small belly.

2. Children are in a state of long body, and the clothes will be replaced quickly.If you have a lot of skiing, you can start a set by yourself. It is recommended to be slightly larger in size 15-20cm, or you choose a style that can adjust the size.In principle, it can be worn until the next winter.

3. If you just take your children to play occasionally, you can rent a set in the ski resort. It does not need to cost more money, but also save time.Before leasing, call the ski resort to confirm whether the leasing service is provided and whether there are corresponding clothes sizes to avoid unsuccessful styles.

4. In terms of color, because the snow field is white at a glance, you must choose a bright color for your child, which is more eye -catching and conducive to taking pictures.When there are many people, it can also play a role in reminding and finding.

5. The waterproofness of skiwear is particularly important. Ordinary children's skiing clothes are generally 5000mm, which is enough to cope with the snow field that the baby can go.However, if children prefer or participate in training classes, it is still recommended to prevent waterproofing, such as 10000mm.

3. National Standards for Children's Ski Service

1. GB-18401-2010 National Textile Products Basic Safety Technical Specifications

(1) Internal quality: The formaldehyde content 20mg/kg, pH value 4.0-7.5, can be disabled to dispel the disabled cancer aromatic amine dye, and cannot have odor.

(2) Dyeing fastness (grade): water resistance (color change, coloring) is 3-4, acid-resistant sweat stains (color change, stained) level 3-4, dry friction level 4, saliva resistance (color change, stained)Level 4.

2. FZ/T81014-2008 "Infant clothing"

(1) The product logo should be indicated that it should not be cleaned.

(2) The collar and hat are not allowed to use the rope band.The length of the rope on the finished product must not exceed 14cm.

Disclaimer: The above method stems from the index of the program system or the sharing of netizens. It is for your reference only and does not represent the research perspective of this website. It proves that it is valid. Please pay attention to the authenticity and authority of the source of the content of the content.Apply to delete & gt; & gt; error correction & gt; & gt;