Common problems and improvement suggestions on wire surface

The main common problems of TPE wire are: the surface is not smooth, the surface is precipitated, the surface is scratched, and the skin peels off. Let's analyze these abnormal problems one by one and give appropriate suggestions for improvement.

1. The surface of TPE wire is not smooth

(1) Causes of non-smooth: TPE wire processing often results in non-smooth surfaces, which are generally caused by improper temperature adjustment and uneven mixing of flame retardants. It may also be caused by incorrect mold selection. Of course, it also has a lot of material formula. Relationship.

(2) Suggestions for improvement of non-smooth: Experienced manufacturers will eliminate equipment problems and find the right temperature after repeated adjustments, but engineers should be cautious about selecting suitable materials and specific formulas. It is recommended to communicate more with the raw material supplier, know the physical properties of the material and processing precautions, and choose the right material, it will get twice the result with half the effort! The surface processing of TPU wire is better than TPE wire.

2. Precipitation on the surface of TPE wire

(1) Separation phenomenon: Separation usually manifests as: the surface is white, oily or foggy. With the current technology, there is no material that can guarantee no precipitation at all, and this problem cannot be solved;

(2) Suggestions for improvement of precipitation: It is recommended that customers choose TPE materials with a slight whitening surface when choosing, and this precipitation will not affect its physical and electrical properties. But try to avoid using materials with oil on the surface, as the oil on the surface is prone to peeling and peeling. In addition, the precipitation is also divided into seriousness. The precipitation of good materials is slight, and it is not easy to occur in a short period of time, even if it occurs with a gentle hand.

Whitening phenomenon of TPE wire

3. The surface of the TPE wire is scratched white

(1) Whitening reason: There are too many white powders in the TPE wire production formula, and the rubber composition is reduced. Since the white filler is only physically mixed with the rubber, there is no chemical reaction, so it is easy to scrape the white material.

(2) Suggestions for improvement of whitening: Choose TPE grades with relatively less white fillers, or use coupling agent-modified heavy calcium instead of ordinary heavy calcium to improve the compatibility of the filler and the matrix, thereby enhancing the resistance of the TPE material Scraping.

4. TPE wire peels off the skin and glues

(1) Reasons for peeling and gluing: The TPE plug has poor compatibility with the wire material, and the encapsulation is not firmly bonded.

(2) Suggestions for improvement of peeling and glue loss: Try to choose the same material for both the TPE plug and the wire; if different materials are needed, two materials with close compatibility should be used.