描述

用于3D打印的工程塑料透明TPU颗粒不同硬度

TPE材料优势

1。出厂价格，质量稳定

2。成本低，模具性能好

三,。优异的耐水性和耐热性

四,。平衡的机械性能

五,。优异的电气性能

六,。可提供免费样品

七,。易于成型

工程塑料透明TPU颗粒不同硬度3D打印

产品详细信息

工程塑料透明TPU颗粒3D打印不同硬度的颗粒

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TPU泛黄的原因

TPU耐泛黄的条件：聚合物结构本身在大分子链之间有键能。当提供的能量大于键能时，分子链只会产生活性中心，这将使使用中的聚合物在储存期间逐渐降解，并导致变黄。光的影响当材料吸收光能时，被吸收部分的分子链会发生碳-碳键或碳-氢键断裂

热量和氧气影响数据产生氧化效应，热量会加速数据的氧化过程。过氧化物结构形成后，自由基简单地形成，导致浅色和白色材料变色。氧对不饱和二烯类材料有明显的损伤作用。除了激活氧化，氧还可以导致-C-C键开裂和双键断裂

其他因素的黄变也与添加剂的添加、水分、杂质的存在和加工工艺有关。混合各种化学或机械杂质会降低聚合物的稳定性。原因比较复杂，具体问题需要详细分析。TPU耐黄变等级通常根据灰色卡片分为1-5级

通过耐黄变测试后，如阳光测试、QUV或其他日晒测试，比较测试前后样品的颜色变化，TPU耐黄变水平为5，这意味着颜色根本没有变化。一般来说，4-5级轻微变色，大多数TPU应用现在都得到了满足。如果需要完全改变颜色，通常需要使用脂肪族TPU，即所谓的非泛黄TPU，基材不是MDI，通常是HDI或H12MDI等，长期紫外线测试不会改变颜色

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Engineering Plastic Transparent TPU Granules Pellets Different Hardness For 3D Printing

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TPE Material Advantages
1. Factory price with stable quality
2. Low-cost and high Mold-ability.
3. Excellent Water Resistance and Heat Resistance.
4. Balanced Mechanical properties.
5. Excellent Electrical properties.
6. Free sample can be provided.
7. Easy Molding

Engineering Plastic Transparent TPU Granules Pellets Different Hardness For 3D Printing

Product Details

Engineering plastic transparent TPU granules pellets different hardness for 3D printing

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Causes of TPU yellowing

The condition of TPU resistance to yellowing: The polymer structure itself has a bond energy between the macromolecular chains. When the energy supplied is greater than the bond energy, the molecular chain simply produces active centers, which will make the polymer in use Gradually degradation during storage and storage leads to yellowing. The influence of light When the material absorbs light energy, the molecular chain at the absorbed part will undergo carbon-carbon bond or carbon-hydrogen bond cleavage.

Heat and oxygen affect the data to produce oxidation effect, and heat will accelerate the oxidation process of data. After the peroxide structure is formed, free radicals are simply formed, causing light and white materials to become discolored. Oxygen has an obvious damage effect on unsaturated diene materials. In addition to activating oxidation, oxygen can also cause -C-C-bond cracking and double bond rupture.

The yellowing of other factors is also related to the addition of additives, the presence of moisture, impurities, and the processing technology. Mixing various chemical or mechanical impurities will reduce the stability of the polymer. The reasons are more complicated, and specific problems need to be analyzed in detail. TPU yellowing resistance grades are generally divided into 1-5 grades based on gray cards.

After passing the yellowing resistance test, such as Suntest, QUV or other solarization tests, comparing the color changes of the samples before and after the test, the TPU yellowing resistance level is 5, which means that the color does not change at all. Generally speaking, 4-5 grades are slightly discolored, and most TPU applications are now satisfied. If you need to completely change the color, you generally need to use aliphatic TPU, which is the so-called non-yellowing TPU, the base material is not MDI, generally HDI or H12MDI, etc., and long-term UV testing will not change color.

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