source:Industry News Popular:adapter release time:2021-05-15 10:09:37 Article author:sznbone
It is made of MDI containing NCO functional group and POLYOL, 1.4BG containing OH functional group through extrusion and mixing. Because of its good elasticity, good physical properties, and excellent mechanical strength, it is widely used in injection, extrusion, Processing methods such as calendering and dissolving into solution resins are plastic materials often used by plastic processing industries, and their products cover the range of industrial applications and necessities for people's livelihoods.
In recent years, due to the continuous development of new products, the amount of thermoplastic PU elastomers is continuously increasing, creating new opportunities for the plastics processors to create low-cost, high-value-added industries.
Because of its superior performance and environmental protection concept, it is becoming more and more popular. At present, wherever PVC is used, TPU can become a substitute for PVC. However, the advantages of TPU are beyond the reach of PVC. TPU not only has excellent high-tension, high-tension, toughness and aging resistance characteristics, but also is a mature environmentally friendly material.
1. Poor peeling:
A. Too little powder, talc powder is not completely dried, and need to work overtime enough to dry well talc powder.
B. The distance between the inner and outer molds is too far, and the distance between the inner and outer molds must be reduced if the extrusion is too full.
C. The semi-finished product stranded outside diameter is too small, it is not easy to pass powder: the stranding and extruding are passed through a proper amount of release agent before passing the powder.
2. Poor appearance caused by too much powder:
A. Talcum powder accumulates too much in the inner mold tube, which blocks the smooth operation of the semi-finished product and causes poor appearance.* Dry the talc powder in the inner mold tube.
B. When the brush has not been brushed to remove excess talcum powder, the semi-finished product should be placed in the center of the brush so that the brush can remove the excess talcum powder.
C. The inner mold is too small: Because the inner mold of the powdered wire is larger than the wire (same specification) that is not powdered, it is easy to choose an inner mold with an aperture larger than the usual 0.05-0.2M/M during production.
British assembly head + product suffix
3. Core wire adhesion:
A. Insufficient cooling: The powder line is generally thicker, and the core wire is easily adhered due to insufficient cooling during production. Keep enough cold water in each section of the production tank to achieve sufficient cooling.
B. Insulating PVC melts at high temperature, causing the core wire to stick: the core wire is extruded, and the appropriate amount of release agent is used when twisting, and the release agent is passed through the release agent and then the powder before the outer is extruded, or the stranded outer is extruded. Powder and improve.
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