Pulling line: Some undesired line protrusions (not found in the mold) produced during the production of plastic molding, need to re-modify the mold (reduced height and increase the degree of smoothness) and add additional pressure mold (we call it the upper mold) To solve. When the cable is too large, it is regarded as a defective product and cannot be used for high-grade blister packaging. However, in the area of component rotating trays, as long as the cable is arranged neatly and does not affect the function, it should be regarded as a qualified product. Pull line is also called: pull bar.
Scratches: Scratch marks on the transparent plastic blister, especially if the marks are too long or too large, the blister becomes defective and cannot be used for high-grade packaging.
Crystal point: In the production process of plastic sheet, due to the fine dust in the air, it is dropped on the heated plastic material, resulting in a transparent flaw, especially in the production of transparent plastic sheet. If it is too large or too much, it is considered as defective.
Bubbles: In the production process of plastic sheet, the heated plastic material contains air, so that the produced finished product sheet has air bubbles, especially in the production process of transparent plastic sheet, the bubbles are too large, Too much is considered defective.
Water ripple: In the production process of plastic sheet, due to different materials and processing techniques, the finished product sheet surface has surface ripples, especially in the transparent plastic sheet production process. If it is too much, it is considered inferior. In general, the thicker the sheet, the more pronounced the water ripples. Qualified PET materials have few water ripples, but most PVCs have water ripples.
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