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Owe note

In luggage making production, the shape of the pieces is incomplete because the cavity is not filled.

Flash flash

The rest of the material that spills into the gaps between the closing surfaces of the mold and remains on the piece during the production of the luggage.

Weld mark

A linear trace on the surface of a plastic piece, by injection or extrusion in the flow of a number of streams in the desert, melt at the interface is not fully fused, each other can not melt as a whole, resulting in fusion imprinting, affecting the appearance of the plastic quality and mechanical properties.

Wave flow mark

Due to the improper flow of molten material in the mold cavity, resulting in the plastic surface of the ring shape, spiral shape or cloud shape wavy uneven defects.

The surface of the muddy

A crack or damage on the surface of a plastic piece. The phenomenon of external or internal cracks in the plastic pieces due to long or repeated application of stresses lower than the luggage making mechanical properties is called stress cracking. Due to the plastic under a certain temperature under the action of a constant load for a certain time, the phenomenon of a sudden complete fracture is called stress fracture; Thermal stress cracking occurs when some thermoplastic components are overexposed to high temperature.

Fracturing

The term "luggage" refers to visible cracks in the enhanced material one or more layers beyond that visible through the resin layer covering the surface.

Chap

A defect that causes the surface of the layered luggage to break and visibly separate.

Buckling

The appearance of creases or wrinkles appearing on one or more layers of the plastic during the making of the pieces.

Crack an albino

Plastic surface produced more obvious micro crack called crack, and similar to the crack frost micro crack called albino, crack and albino are no cracks in the micro crack. Environmental stress cracking occurs when a plastic is exposed to a chemical environment or under stress conditions.

Silver silking

Plastic surface along the direction of the flow of material produced acicular silvery-white as frost fine lines.

Stripe

A linear streak defect on the surface or inside of a plastic piece.

Speckle

Dark spots of mica flake on the surface of plastic parts due to dispersion or poor mixing of pigment and other reasons.

Orange peel grain

An orange - peel - like appearance defect on the plastic surface.

Bubble hole stripe

In the word bubble luggage making, it refers to a layer of bubble holes that is very different from its inherent structure.

Black spots

In the luggage making process, the molten material overheats and dissolves under high temperature and pressure, resulting in black carbonization points on the plastic surface.

A white dot or bright spot

There are under-plasticized particles in the transparent or translucent luggage making film, sheet or piece. White particles can be seen when transmitted with light. These particles are called "fish eyes". If the material is opaque or colored, the speckle is called a white or bright spot.

Pitting

A small regular or irregular sinkhole on the surface of a plastic piece, usually of approximately the same depth and width.

Packing spot

The presence of fillers such as wood powder or asbestos in a plastic piece.

Dark spots

A dark stain that appears on a fabric-based laminate structure.

Charred and blotchy

In the production process of luggage making, under high temperature and pressure forming condition, the molten material will be carbonized due to overheat decomposition. The carbonized coke will be mixed into the molten material, which will form blemish defects on the surface and inside of the plastic parts.

Air bubbles

In the filling process of luggage making, if there is a large amount of gas in the molten material or the air in the cavity is not completely removed, the plastic piece will be formed with small volume or series of pores.

Vacuum bubble or dark bubble

When the luggage making is cooled and cured, the outer surface is cooled and cured, but the inside is still in hot melt. Once the central part is cooled and contracted, there will be a vacuum hole inside the plastic piece. This kind of hole is commonly called vacuum bubble or dark bubble, also called shrinkage hole.

Pinhole

Luggage making a pin-size hole defect in the film or film.

Flat bubble

Bubble luggage making a local density defect resulting from the destruction of the bubble hole structure during the making process.

Sag and shrink

In the cooling process of luggage making, the surface layer cools and solidifies first and the inside or the thick part of the wall cools and solidifies later. As a result, the contraction speed of the inside and outside is inconsistent when the volume shrinks. Thus, the surface layer of plastic pieces is drawn by the inside and forms a depression, resulting in shallow pit or pit.