PVC tape is extensively used in different areas,such as electrics, wires, ducts wraps and ground warning etc. PVC Film as a substrate ,and Solvent based natural rubber as coating adhesives. There also have different types of PVC tape according to different usage, for instance
- PVC electrical insulation tape
- Automotive Wire Harness Tape
- Marking Tape
PVC electrical insulation tape
Automotive Wire Harness Tape
How to produce PVC Tape?
Simply, PVC film with Solvent-based rubber adhesive, after coating,drying,rewinding etc process, then you will get PVC tape.
Actually ,it is not so simple like that. In the next,I will tell what we should prepare before produce it.
- Confirm PVC Tape type producing, normally different types have different technique process, such as pvc film and adhesive formula.
- PVC tape production line, there have PVC electrical tape coating machine, pvc tape cutting machine, packing machine etc.
- Substrate of PVC film. Choose the right film is very important.For instance, film thickness, quality grade(Calcium powder content,virgin PVC granule),tensile strength, voltage insulating grade(normally should pass 3kv voltage testing). Anyway,find out the suitable and good pvc film, it’s not easy.
- Solvent-based rubber adhesives. adhesive formula is deemed to a secret for pvc tape manufacturing factory. Maybe different factories have a little difference on the formula. It largely determine the tape quality.
- Solvent recycling equipment. Generally use natural rubber or synthetic rubber as solute,toluene as solvent. But toluene is expensive,it also can be recycled using. So we can establish solvent recycling equipment ,then collect the vaporized solvent during drying, therefore, we can save more cost.
- Paper core. Usually 38mm,32mm size as electrical tape, 76mm size as making tape
- Cutting machine. After coating, we will get rolls, then we can use cutter to get small piece of tapes
- Packing machine. After we get small piece of tape,we can use packing machine to automatically packing all of them
- Put the pvc film on the lift-type auto unwinder, and ready for transfer to gravure coater. In addition,there have one accumulator in the middle, it is use for nonstop running during exchange rolls
2. First gravure coater. It is used for bottom adhesive coating. Normally, pvc film surface is smooth, it is hard to connect tightly with adhesive. So that, there must have bottom adhesive as pre-coating.In addition, the bottom adhesive viscosity is lower than second stage adhesives
3: Entry the first drying oven,heating the bottom adhesive. Then make it dryer,and entry to second comma blade coater for second adhesive coating
4: Make the second adhesive coating,we also call it surface adhesive. Moreover,the coating thickness can be adjusted.
5: Drying the surface adhesive, after drying, then enter to cooling device. Cooling process is also very important, it highly affect tape forming molecular structure.Normally, we can put 1-10℃ water into the cooling cylinder, so that it can fast cooling.
6: Auto Rewinding. It is the last process of pvc tape coating machine.Further more, it is the core technology for making auto rewinding. The line whether can run 25m+/s or not, mostly depend on your rewinder running situation. GS coater can do 30m+/min rewinder.
7: After getting the pvc rolls, pls dont cut it immediately, we should put to curing room, let them curing 2-3 days. Then we will get more better quality.
Famous brand of PVC Tape
- 3m ,scotch tape
- Four Pillar Group,Dear Brand, Symbio (GS provide six pvc tape lines at present,separately established different region)
- Achem, such as Wander brand
- Yongle brand,huaxia. It was the biggest factory in China. Now it was separated different company
- Yong Guan (GS provide 4 pvc tape lines at present)
- Shushi (GS cooperated with them)