Time：2023-04-19 11:28:26 Writer：Mr.Zhang page views：16300 source：YIFULI
The adhesive of sealing tape is acrylic resin adhesive, also known as pressure-sensitive adhesive, with rosin as the main component. Rosin is a polymer active substance, and temperature has a certain impact on its molecular activity. The rosin content of the adhesive directly affects the use of the tape. The initial adhesion of normal sealing tape is between ≥13 (steel ball number). The thickness of this type of adhesive tape is generally 22 microns, which meets the standard thickness.
Sealing tape is generally composed of base material and other auxiliary materials. Auxiliary materials include curing agents, toughening agents, diluents, fillers, coupling agents, etc. Some adhesives may not contain so many ingredients, which mainly depends on the properties and uses of the adhesive:
1.Base material: The base material is the most basic component of the adhesive and is also one of the transparent tape components.
2.Curing agent: The curing agent is a substance that hardens the base material into a solid and is the main component of the adhesive.
3.Toughening agent: The toughening agent can increase the toughness of the adhesive layer, improve the impact resistance, peel strength, and bending ability of the adhesive layer, reduce the reaction heat and shrinkage during curing, and is also one of the transparent tape components.
4.Diluent (also known as solvent): The diluent can reduce the viscosity of the adhesive, make it easy to operate, and improve the wettability and flowability of the adhesive.
5.Filler: Adding filler to the adhesive can improve the mechanical properties of the adhesive, and it is also one of the transparent tape components.
Large, medium, and small ordinary packaging sealing tape (BOPP biaxially stretched polypropylene) is an indispensable product in any enterprise, company, or individual life. Due to its low technical content and numerous domestic manufacturers, the products on the market are uneven.
Methods to distinguish the quality of sealing tape:
1.In fact, there are two standards for distinguishing the quality of sealing tape, one is initial adhesion, and the other is holding force, which are inversely proportional to each other.
2.Generally speaking, the adhesive tape with an initial adhesion of less than 10 is coated with less glue, generally only about 20 microns, such as stationery tape and ordinary promotional binding tape. The initial adhesion of normal sealing tape is between 15-20, and the thickness of this type of adhesive tape is generally between 22-28 microns, which is the standard thickness.
3.Most of the tapes on the market are mixed with impurities, so the thickness increases. To cover the impurities, the adhesive also contains color powder, so transparent tape appears yellow or light green. Such tapes are generally of poor quality.
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