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可生物降解塑料流延膜有什么特点

可生物降解塑料流延膜有什么特点

来源网址:https://www.swjjkl.com/ 2021-07-06 13:45:58    

1. 外观 塑料包装薄膜有表面企业应当进行平整以及光滑,无褶皱或仅有一些少量,无明显的凹凸不平、黑点、杂质、晶点和僵块,没有一个条纹、斑痕、暴筋,无气泡、针孔及破裂,此外,还要求面清洁环境干净,无灰尘,油污等。pbat属于热塑性生物降解塑料,是己二酸丁二醇酯和对苯二甲酸丁二醇酯的共聚物,兼具PBA和PBT的特性,既有较好的延展性和断裂伸长率,也有较好的耐热性和冲击性能;此外,还具有优良的生物降解性,是生物降解塑料研究中非常活跃和市场应用更好降解材料之一。

1. The appearance of plastic packaging film has a surface, and the enterprise should be flat and smooth, without wrinkles or a small amount, without obvious bumps, black spots, impurities, crystal points and rigid blocks, without a stripe, spot, blister, bubble, pinhole and crack. In addition, the surface should be clean, and the environment should be clean, without dust, oil, etc. PBAT is a kind of thermoplastic biodegradable plastics. It is a copolymer of butylene adipate and butylene terephthalate. It has the characteristics of PBA and PBT. It has good ductility, elongation at break, heat resistance and impact resistance; In addition, it has excellent biodegradability and is one of the most active biodegradable materials in the research and market application of biodegradable plastics.
生物降解材料随着人类保护环境意识的提高,石油资源的不断减少,生物降解聚合物取代传统石油基聚合物已经成为发展的趋势。生物降解颗粒抗水性能的影响规律,得出制备SPI可生物降解材料的改性工艺条件为:SPI与四氢呋喃的质量体积比为1:3,并采用正交组合试验设计优化了SPI可生物降解材料的改性条件;在条件下所制得的SPI可生物降解材料的拉伸强度为8.61MPa,断裂伸长率为196.78%,吸水率为31.6%。
玉米淀粉颗粒
With the improvement of people's awareness of environmental protection and the continuous decrease of petroleum resources, biodegradable polymers have become the development trend to replace traditional petroleum based polymers. According to the influence law of water resistance of biodegradable particles, the modification process conditions for preparation of SPI biodegradable materials were obtained as follows: the mass volume ratio of SPI and tetrahydrofuran was 1:3, and the modification conditions of SPI biodegradable materials were optimized by orthogonal combination design; Under the optimum conditions, the tensile strength, elongation at break and water absorption of SPI biodegradable material were 8.61 MPa, 196.78% and 31.6%, respectively.
3. 透明塑料薄膜的透明度和光泽度要求较高,一般应达到92%以上:对于乳白色可生物降解塑料薄膜,需要具有较高的白度和良好的透射性。
3. The transparency and glossiness of transparent plastic film are required to be higher, generally more than 92%; for milky biodegradable plastic film, it needs to have higher whiteness and good transmission.
4. 塑料薄膜的物理机械性能包括拉伸强度、断裂伸长率、撕裂强度、冲击强度等。
4. The physical and mechanical properties of plastic film include tensile strength, elongation at break, tear strength, impact strength, etc.
5.透湿性是指塑料薄膜材料在一定条件下的水蒸气透过能力,如相对湿度为90%,温度为30C时,24小时内每平方米厚度为25um的塑料薄膜的水蒸气质量,在一定程度上代表了薄膜材料的防潮性。
5. Moisture permeability refers to the water vapor permeability of plastic film materials under certain conditions. For example, when the relative humidity is 90% and the temperature is 30C, the water vapor quality of the plastic film with a thickness of 25um per square meter within 24 hours represents the moisture resistance of the film materials to a certain extent.
6. 透氧量 表示中国塑料包装薄膜进行材料在一定的条件眄对水蒸气的透过量,比如在一个相对环境湿度为90%、温度为24C的情况下,24h内厚度为25um的塑料通过薄膜每平方米所透过的氧气的体积。
6. Oxygen permeability refers to the permeability of Chinese plastic packaging film to water vapor under certain conditions, such as the volume of oxygen per square meter of 25um thick plastic through the film in 24h under the condition of 90% relative humidity and 24C temperature.
7. 几何尺寸稳定,塑料薄膜必须具有一定的几何尺寸稳定性,否则,其膨胀率过大,在印刷和复合过程中由于机械力或热容易发生膨胀变形,不仅会影响套印精度,还会出现皱折、卷曲等问题,严重影响产品质量和生产效率。
7. The geometric dimension is stable. The plastic film must have a certain geometric dimension stability, otherwise, its expansion rate is too large. In the process of printing and compounding, it is easy to expand and deform due to mechanical force or heat, which will not only affect the overprint accuracy, but also cause problems such as wrinkles and curls, which will seriously affect the product quality and production efficiency.
8.化学稳定的塑料薄膜在印刷和复合过程中应接触油墨、粘合剂和一些有机溶剂,这些都是化学物质。因此,塑料薄膜必须对这些化学物质有一定的抵抗力,才能不受它们的影响。
8. Chemically stable plastic film should be in contact with ink, adhesive and some organic solvents in the process of printing and compounding, which are chemical substances. Therefore, the plastic film must have a certain resistance to these chemicals in order not to be affected by them.
9. 表面张力 为了使印刷油墨和复合用胶黏剂在塑料薄膜材料表面形成具有一个良好的润湿性和黏合性,要求以及薄膜的表面张力应达到企业一定的标准,否则我们就会产生影响中国油墨和胶黏剂在其研究表面的附着力和黏合性,从而可以影响印刷品和复合技术产品的质量。
9. Surface tension in order to form a good wettability and adhesiveness of printing ink and composite adhesive on the surface of plastic film materials, the surface tension of the film should meet certain enterprise standards, otherwise we will have an impact on the adhesion and adhesiveness of Chinese ink and adhesive on its research surface, This can affect the quality of printed matter and composite technology products.