All possible plastic film defects that were detected and eliminated by the extruder operator before the roll is sent to the customer. But in practice, due to oversight and inattention to detail, defects can slip, which can be easily noticed by the client or the client. I found many unrelated errors that fit into this category.
First of all, it's the look and the beautiful looking, finished plastic film roll, this aspect can be half the battle. Keep in mind that the first impression that you see is what you get! A superbly ugly roll that can be converted on a filling machine or in bags can cause the operator to look at the roll much closer for the entire batch for real or perceived defects.
A roll that looks like a machine cylinder means no scratches, damaged edges and fuzzy ends, protruding or buried ends of the core or shredded cores. Solutions to these problems are obvious. There are other smaller defects that can be buried in a roll, and maybe, if the production line never approaches the operator, except in cases of changing the roll. There is no excuse for the customer to see them first.
I have several areas to help prevent roll defects:
How to deal with the blocking of plastic film - a common cause of blocking - too much tension. Perhaps it looked so stressless that it would crush the core because the film was damaged on a roll. This prevents the operator from removing the roll from the reel shaft. With the body of the crushed cores, the rolls can be difficult to break out of the shaft, only so that the client cannot rewire them to the leeward wall.
Just as bad a problem may arise if the winding tension is too light, without blocking, but the film can telescope from one end of the roll, which makes it impossible to convert to a finished product.
Hot weather can bring your share of problems with blocking. The plastic film is not sufficiently cooled and the inner surface is blocked when they pass through the pressure rollers. For treatment, you must reduce the output, raise the height of the tower or clamping rollers, or use chilled air or other means of improving cooling efficiency. It may also be an ineffective air ring.
A completely different reason for blocking could be the use of a resin to produce a film of 1 milliliter thickness, which has a slip level and an anti-lock additive designed for heavier sensors, such as 4 mil. There is simply not enough supplements to do a proper job. Excessive processing and high gloss can be exacerbated if you do not cause blockage with any of the above conditions.
Splitting tendency - plastic sheeting with split tenders can also be missed without taking samples for testing or actual testing. Inadequate cooling, high freezing temperatures, or low blowing ratios, separately or in combination, can increase the direction or orientation of the film in the machine, which leads to film cracking. In addition, your gags in the tower may be tightened, especially with an old and reinforcing pressure roll that can deform the plastic film on the edge and make it split. Punching lines or another name are the welding lines from the extrusion head, forming a split film, as well as scratches from a collapsing frame in an extrusion column or boron, which was developed using wooden collapsing frames. But not so that it was discovered, these are thin lines of welding caused by destroyed particles of resin or dirt under or in the lips of the matrix, which make the film extremely fragmented during welding.
Good operator observation of equipment maintenance, quality control of sample rolls and the introduction of proper procedures will help increase customer loyalty.
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dbanig@prflexbag.com
