As amylose increases, the average particle size and crystallinity of corn starch particles gradually decrease, and the degree of polarization cross will also weaken. According to the degree of clarity and crystallinity of the polarized cross, the order is: waxy corn starch>regular corn starch>high amylose corn starch. The observation results using a scanning electron microscope show that waxy corn starch is mostly irregularly polygonal in shape; However, ordinary corn starch is similar to waxy corn starch, with most being irregularly polygonal and a few being spherical. And the particle diameter of high amylose corn starch is smaller than that of waxy corn starch and regular corn starch.

利用光学显微镜观察三种不同直链淀粉含量玉米淀粉结构发现，以颗粒大小和均匀程度而言，26% 普通玉米淀粉＞50% 高直链玉米淀粉＞70% 高直链玉米淀粉。且26% 普通玉米淀粉颗粒形貌近似圆形，而 50% 和 70% 高直链玉米淀粉颗粒形貌都近似椭圆形。通过扫描电子显微镜（SEM）观察，也证实高直链玉米淀粉大多数为椭圆形，少数为不规则形状。高卫帅等对高直链玉米淀粉蜡质玉米淀粉和普通玉米淀粉进行粒度分布实验。

Observing the structure of corn starch with three different levels of amylose content using an optical microscope, it was found that in terms of particle size and uniformity, 26% ordinary corn starch>50% high amylose corn starch>70% high amylose corn starch. And the morphology of 26% ordinary corn starch particles is approximately circular, while the morphology of 50% and 70% high amylose corn starch particles are approximately elliptical. Through scanning electron microscopy (SEM) observation, it was also confirmed that most of the high amylose corn starch is elliptical in shape and a few are irregular in shape. Gao Weishuai et al. conducted particle size distribution experiments on high amylose corn starch, waxy corn starch, and ordinary corn starch.

玉米淀粉颗粒

Corn starch granules

通过分析粒度分布图表明，普通玉米淀粉和蜡质玉米淀粉粒度分布情况（包括：径距比表面积表面积平均粒径体积平均粒度等）基本相同，粒径值与更小值差距较小；而高直链玉米淀粉上述参数比另外两种玉米淀粉大，且粒径值与更小值差距也较大，粒径分布相对较均匀。

By analyzing the particle size distribution diagram, it is shown that the particle size distribution of ordinary corn starch and waxy corn starch (including the average particle size, volume, particle size, etc.) is basically the same, and the difference between particle size values and smaller values is relatively small; The above parameters of high amylose corn starch are larger than the other two types of corn starch, and the difference between the particle size value and the smaller value is also significant, and the particle size distribution is relatively uniform.

无定型区和结晶区通过环状交替形成淀粉颗粒。其主要构成是由直链淀粉和支链淀粉组成，结晶区主要有支链淀粉组成，也含有少量直链淀粉（直链淀粉含量仪）；大部分直链淀粉形成无定形区。

The amorphous and crystalline regions alternate in a circular pattern to form starch particles. Its main composition is composed of amylose and amylopectin, and the crystallization zone mainly consists of amylopectin, which also contains a small amount of amylose (amylose content meter); Most amylose forms amorphous regions.

结晶区和无定形区折射率和密度不同，从而在偏光显微镜下观察淀粉颗粒时会产生偏光十字。不同种类玉米淀粉偏光十字位置性状及明显程度都有差异，偏光十字明显程度受淀粉颗粒大小和结晶程度影响。直链淀粉含量影响淀粉结晶程度，直链淀粉含量越高，结晶度越低。

The refractive index and density of the crystalline and amorphous regions are different, resulting in a polarized cross when observing starch particles under a polarizing microscope. There are differences in the position and degree of polarization cross of different types of corn starch, and the degree of polarization cross is influenced by the size and crystallinity of starch particles. The content of amylose affects the degree of starch crystallization, and the higher the content of amylose, the lower the degree of crystallinity.

随着塑料餐具较多使用，消费者的需求也不仅仅停留在简单的能用就可以了，很多消费者对产品的各个方面也有了对应的要求，塑料餐具厂家也为了迎合消费者的需求进行了一些列的设计和生产，下面就简单介绍一下要求：

With the increasing use of plastic tableware, consumers' needs are not limited to simple functionality. Many consumers also have corresponding requirements for various aspects of the product. Plastic tableware manufacturers have also carried out a series of design and production to meet the needs of consumers. Below is a brief introduction to the requirements:

耐磨性

Wear resistance

具备反复使用方便，随着环保意识的增加塑料袋再次利用也成了很多消费者的习惯，所以就要具备较好的耐磨性

With the increasing awareness of environmental protection, the reuse of plastic bags has become a habit for many consumers, so it is necessary to have good wear resistance

印刷图案

Printing patterns

普通市场的方便袋对印刷设计没有太多要求，但是一些包装袋就有要求了，好看的设计图案在视觉上给消费者较好的吸引，也利于产品的销售，这一方面的作用越来越大了。

The convenience bags in the ordinary market do not have many requirements for printing design, but some packaging bags do. Beautiful design patterns visually attract consumers and are also conducive to product sales, which plays an increasingly important role.

密封性

Sealing performance

不同的货物包装，对于密封程度也有不同的要求。然而，在正常情况下，需要密封的产品通常具有潮湿和发霉的特性。因此，大多数工业对包装袋的密封性能要求一般都很高。

Different packaging of goods also have different requirements for the degree of sealing. However, under normal circumstances, products that need to be sealed usually have damp and moldy characteristics. Therefore, most industries generally have high requirements for the sealing performance of packaging bags.

实用性

Practicality

包装袋的设计和生产，塑料袋生产商具体的方式提醒客户使用的考虑，如环境，使用商业物业运输储存环境。

The design and production of packaging bags, as well as the specific ways for plastic bag manufacturers to remind customers of their usage considerations, such as the environment and the use of commercial property transportation and storage environments.

保存性

Preservation

根据用户不同的商品条件，选择适合的材料和合理的比例，设计制作适合不同行业的塑料袋。例如，有些塑料制品害怕长时间的直射阳光，这对产品的保存有不好的影响。行业可以在这方面改进和发展。

According to the different product conditions of users, choose suitable materials and reasonable proportions to design and produce plastic bags suitable for different industries. For example, some plastic products are afraid of prolonged direct sunlight, which has a negative impact on product preservation. The industry can improve and develop in this area.

玉米淀粉塑料制品具有生物可降解性良好机械性能及物理性能良好相容性良好的优点。但与易得的甘蔗浆相比，玉米聚乳酸产量仍不高。而且玉米也是一种主粮，大量制作聚乳酸会大量消耗玉米，从而提高粮食的。

Corn starch plastic products have the advantages of good biodegradability, mechanical properties, and physical properties, as well as good compatibility. However, compared to easily available sugarcane syrup, the yield of corn polylactic acid is still not high. Moreover, corn is also a staple food, and large-scale production of polylactic acid will consume a large amount of corn, thereby increasing the price of food.

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This article is dedicated to the friendship of corn starch granules. For more relevant knowledge, click on: http://www.1958666.com We will provide you with comprehensive services with a sincere attitude. We will gradually contribute more relevant knowledge to everyone. Stay tuned