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Viscosity is an important property of thermoplastic elastomer TPE
.
However, in most cases, conventional TPE does not have functional viscosity, but needs to be adjusted through the compounding system to obtain the required adhesion (adhesion)
.
So what is the significance of the viscosity of TPE materials? The following China Plastics editor will give you a detailed introduction
.
1.
The stickiness of the surface of the soft TPE material Some low-hardness TPE materials, due to the high content of oil components in the compound, result in a sticky feeling on the surface of the soft TPE material
.
This sticky feeling is caused by the oil in the formula
.
Generally, TPE (TPR) based on SBS is more prone to surface stickiness.
This kind of stickiness is negative and is what users want to eliminate
.
2.
The self-adhesiveness of TPE material refers to the strong adhesion on the surface of TPE material, which is similar to the surface coated with glue
.
This kind of TPE material with strong self-adhesiveness can be used to paste daily necessities to prevent it from falling or tipping over when touched
.
In fact, in the conventional TPE compounding system, adding a tackifier with good compatibility with the main compounding system can improve the viscosity of the TPE material surface
.
This kind of stickiness is positive and is what users demand and hope
.
3.
The problem of viscosity during overmolding.
The viscosity mentioned here refers to that TPE and the coated substrate (plastic) have close solubility sp or good compatibility.
When injection molding at high temperature, there are two kinds of The fusion bonding effect produced by the bonding surface of the material
.
The quality of the adhesion is mainly determined by the surface affinity of the TPE and the coated plastic (similar melting point, close polarity, surface tension, etc.
)
.
.
However, in most cases, conventional TPE does not have functional viscosity, but needs to be adjusted through the compounding system to obtain the required adhesion (adhesion)
.
So what is the significance of the viscosity of TPE materials? The following China Plastics editor will give you a detailed introduction
.
1.
The stickiness of the surface of the soft TPE material Some low-hardness TPE materials, due to the high content of oil components in the compound, result in a sticky feeling on the surface of the soft TPE material
.
This sticky feeling is caused by the oil in the formula
.
Generally, TPE (TPR) based on SBS is more prone to surface stickiness.
This kind of stickiness is negative and is what users want to eliminate
.
2.
The self-adhesiveness of TPE material refers to the strong adhesion on the surface of TPE material, which is similar to the surface coated with glue
.
This kind of TPE material with strong self-adhesiveness can be used to paste daily necessities to prevent it from falling or tipping over when touched
.
In fact, in the conventional TPE compounding system, adding a tackifier with good compatibility with the main compounding system can improve the viscosity of the TPE material surface
.
This kind of stickiness is positive and is what users demand and hope
.
3.
The problem of viscosity during overmolding.
The viscosity mentioned here refers to that TPE and the coated substrate (plastic) have close solubility sp or good compatibility.
When injection molding at high temperature, there are two kinds of The fusion bonding effect produced by the bonding surface of the material
.
The quality of the adhesion is mainly determined by the surface affinity of the TPE and the coated plastic (similar melting point, close polarity, surface tension, etc.
)
.
