What is the impact on the quality of kraft paper tape?
Article provenance：未知 Popularity：Time：2020-03-22 22:03
Recently, corrugated board is used as seal, base material, multi-purpose paper, cloth, polypropylene and PVC film. Apply hot melt adhesive to one or both sides.
The strength of paper base material is not high, but transparent tape material with different plastic film or textile reinforced paper base material is not easy to break by hand, so it can be used
Very inconvenient. Transparent plastic tape for polypropylene and polyvinyl chloride (PU) substrates has high low temperature brittleness.
The base materials of PE and PVC have higher rigidity, tensile modulus and elongation of 5%. Based on this material, the adhesive tape at a lower temperature
The tape will be peeled off due to tensile stress on the uneven surface of the customer area, which is used as the seal of the frozen food container.
Although the tensile strength of the transparent tape material is still very high, it is easy to make the tape broken by hand. This kind of transparent tape material is cheap,
Easy to promote. The production process is simple and cold resistant.
High density polyethylene (density greater than 0.94% g / cm 3) and a tensile ratio of 6:1 are used in the transverse and longitudinal direction of the tape. Polyethylene liner
The primer is coated with pressure-sensitive adhesive.
On the other hand, the transparent tape is coated with another layer of pressure-sensitive adhesive. A layer of paper can be sandwiched between HDPE film and pressure-sensitive adhesive.
Regardless of the type of tape, it is important that the HDPE density of the transparent tape is greater than 0.94% g / cm 3, and the longitudinal and longitudinal
The tensile ratio should be more than 6 times, preferably more than 10 times. The reason why the density of HDPE is not less than 0.94% g / cm 3 is to ensure the
The material has high transverse strength at low temperature.
Coated kraft paper tape manufacturers, sealing tape for joints, transparent tape material is to use cellophane, kraft paper, polypropylene film, etc. Will press
Sensitive adhesive is coated on one or both sides of the substrate, the disadvantage is that the edge of the tape is easy to tear. To avoid this disadvantage, high strength has been used
Degree polyester film substrate. However, the cost of polyester film is high and it is difficult to be widely used.
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