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Buckle
Buckles can be seen everywhere in our daily life, from ordinary clothes, shoes and hats, life jacket,helmet,baby carries,bracelet,pet collards,webbing strap,lanyard ,to commonly used backpacks, camera bags, mobile phone bags, and even MM personal bras.
Buckle classification
Backpack fasteners are generally divided into buckle (also known as side buckle), adjustment buckle, ladder buckle, hook buckle, rope buckle, and there are some more special purposes, now introduce the characteristics, use and strength of these fasteners.
The materials selected are generally POM (polyformaldehyde, commonly known as Saigang), PP and NY.The most recommended and most suitable is the POM material.
The buckle is composed of a male buckle and a female buckle. One end is fixed by a webbing, and the other end can be adjusted by a webbing. The length of the webbing is selected according to different needs. It is generally used to fix the shoulder and waist. In order to play the role of buckle more effectively, the production company is also constantly changing, while reducing the weight, while ensuring the same strength, such as v-shaped buckle. There are also three-way buckles, that is, "Y" buckles, which are often used for safety products such as baby strollers and taxi seat belts. Buttons, etc., can also be authorized to design color labels or LOGOs on the surface of the female buttons, or you can choose electroplating, silk screen, painted. Depending on the feel, you can also polish, spray rubber oil and so on.
In terms of strength, the 25mm buckle used by general casual backpacks can withstand a weight of 40-50 kg, and of course a good buckle can reach 80-90 kg.Now the new buckle can reach 100 kg
Adjustment buckle
Its material is generally POM, PP, NY
Generally speaking, the adjustment buckle is used on the shoulder strap of the backpack, and the shoulder strap of the shoulder bag is used to adjust the length of the webbing. Placing your own logo is mostly similar in shape.
Ladder buckle
Its material is generally PP, POM, NY
The function of the ladder buckle is also to shrink the webbing, which is generally used at the tail of the shoulder strap to adjust the fit of the backpack.
Rope buckle
Its material is generally PP, NY, POM
Utilize the elasticity of the spring coil to hold the rope out of position. The diameter of the rope can be selected from single and double holes. It is suitable for various OO ropes, nylon ropes and elastic ropes. LOGO can be designed according to customer's requirements. The design of the rope buckle is very different from the past. There are many types and metal materials.
Hook
Its materials are generally derived from PP, NY, POM
Hook buckle is usually used on the side of the shoulder bag, one side is connected with the d ring, and the other is connected by the webbing. Many alloy elements have been added to make the hook stronger. The others are not introduced.
There are two main aspects of the buckle during the test:
One is the tensile test. This test is mainly to detect the bearing capacity of the buckle. It is divided into two steps to complete:
1. Instant pull test, mainly used for buckle, D buckle and sun buckle, to test the strength of the buckle when it suddenly encounters a strong pull.
2. Endurance tensile test. Its main principle is to determine the time value of the buckle when determining the load.
3. As for the buckle, there is also the detection of the number of uses, which is constantly opened and closed to test how many times the buckle will deform.
Tri-directional or multi-directional buckle detection is even more complicated.
The second is the temperature test. This is mainly to test the bearing capacity of the buckle at unconventional temperature. It is divided into two types: high temperature and low temperature.
1.The high temperature is usually set at 70 degrees Celsius
2. The low temperature is usually set at minus 30 degrees. The time is 24 hours and then the change in intensity is tested.
The third is the salt spray test. This test mainly monitors the salinity of the fastener. Some products can only be transported by sea. Long-term operation at sea will affect the quality of the product. This test is also divided into two steps. .
1.Soak the buckle in seawater for 72 hours
2.Place the soaked fastener in the sun for 5-7 days
3. After the test, whether the test intensity has changed much.
There are also some such as acid resistance tests, which can be tested according to different needs and materials. Corresponding metal fasteners must also be tested for rust, corrosion, and chemical resistance. Plastic If the fastener has post-processing products, such as electroplating, water dyeing, oiling and other procedures, it is necessary to further test whether these additional procedures are qualified.
Of course, there are higher standards used in extreme sports such as diving. What UL certification, TS16949 certification, VDA6.0 standard, and EU ROHS standard, RAECH standard, EN-71 standard on baby products are not. General buckle manufacturers can pass.
The above is a brief description of the buckle. With the continuous development of products, the variety is increasingly diversified, and the testing in this regard is becoming more and more stric
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