Plastic seals are widely used in oil transportation, chemical industry, railway, container, container, customs, postal, transportation and other industries. The method of use is very simple, and the cost of use is relatively low. Material seal is the use of synthetic resin injection molding, the seal has some thin small steel sheet, plastic seal can be at minus 45 to 50 degrees, zero 50 degrees to 30 degrees completely unchanged, the average tension is greater than 350 N.
First, classification of plastic seals
1.Synthetic resin
Synthetic resin is the most important component of plastics, and its content in plastics is generally 40% to 100%. Because of the large content, and the nature of the resin often determines the nature of the plastic, so people often regard the resin as a synonym for plastic. For example, polyvinyl chloride resin is confused with polyvinyl chloride plastic, and phenolic resin is confused with phenolic plastic. In fact, resin and plastic are two different concepts. Resin is a raw, unprocessed polymer that is used not only to make plastics, but also as a raw material for coatings, plastic lead seals, adhesives, and synthetic fibers. In addition to a very small part of plastics containing 100% resin, the vast majority of plastics, in addition to the main component resin, also need to add other substances.
2.Fillers
Fillers, also known as fillers, can improve the strength and heat resistance of plastics and reduce costs. For example, the addition of wood flour to phenolic resin can greatly reduce the cost, making phenolic plastic one of the cheapest plastics, while also significantly improving mechanical strength. Filler can be divided into organic filler and inorganic filler two categories, the former such as wood powder, rags, paper and various fabric fibers, the latter such as glass fiber, diatomaceous earth, asbestos, carbon black, plastic lead seal and so on. The plastic seal and the plastic lead seal have the same place, here shows that the plastic seal is not a simple plastic strip, but the plastic seal is made of plastic, a kind of fixed wire and cable accessories products, the two ends of the plastic seal are completely different two structures, one end is a square or round plastic material made of the mouth, Inside this is a hook shaped elastic plastic button, the other end is with a lot of small serrated plastic seal body, small serrated on both sides of the plastic seal, the body can be bent through the front of the plastic mouth and form a ring to connect, so tied things are very firm, the fixing effect is very strong and solid.
Second, the use of plastic seals precautions
1, look at the color to buy plastic seals: the color of high-quality plastic seals will not look very bright, very conspicuous. Because of the high-quality plastic seal, its color is not oil, but after deep processing, the color is integrated into the plastic, so that the plastic seal developed will not scratch and will not fade. It’s very textured when you pick it up.
2, compare the weight to buy plastic seals: a high-quality plastic seal is relatively heavy, why? Because the real plastic seal has to be injected into a very many processes in the process of development, the material added is also relatively large. So be sure to look at the weight when purchasing.
3, to choose a manufacturer with a guaranteed quality reputation (without a guarantee of quality reputation, the product is not locked tightly and does not play a anti-theft role), the manufacturer must standardize management in the quality control process, raw material procurement, product testing and other links. With advanced production, inspection and test equipment and strong technical force and research and development capabilities.
4,Sign the contract before ordering. It is very important to require the manufacturer to promise not to provide the container seal number with the same identification and number to the third party, and sometimes even to sign a confidentiality agreement.
5, try not to choose to use a number of manufacturers are produced by the same size/color products (easy to copy, imitate, to some illegal attempts to bring the convenience of imitation, thus losing the true sense of anti-counterfeiting). Products that have been circulating on the market for too long should not be selected. At the same time, manufacturers with technical advantages and research and development capabilities generally develop more selected products on a regular basis to meet the needs of the market.
6, investigate the actual production scale and actual production capacity of the manufacturer to ensure timely and fast supply.
Understand the basic knowledge of the above plastic seals, in order to buy safer and higher quality seals.
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