Ambient foods undergo rigorous heat treatments, such as pasteurization and sterilization, to destroy potentially harmful micro-organisms. They have a longer shelf-life than other packaged food products that are stored and retailed at room temperature.

High-barrier pouches are made of high-performance films and barrier resins, and have unique features such as high or low heat conductivity, resistance to external or internal conditions, special surface properties, high purity, and mechanical properties. High-performance films are thin films made from polymers such as polypropylene, polyamide, polyethylene, polyvinyl chloride, polycarbonate, ethylene vinyl alcohol, and polyester. High-barrier pouches ensure the safety of their contents and are primarily used for non-retort food products.

Plastic processing machinery is used to create plastic products using pellets, granules, and powdered forms of raw materials such as resin and crude oil. Industrial plastic processing machinery includes machines such as IMMs, extruders, BMMs, hollow molders, 3D plastic printers, and thermal forming machines. Plastic processing machinery finds applications in various industries such as packaging, consumer goods, and construction.

Recycling plastic bottles refers to reusing the plastic content to reduce the amount of waste going into landfills by converting it into lower or same grade plastic bottles. These bottles are used in various sectors depending on their properties. Most plastics are semi-porous and absorb molecules of the food or beverage contained. The residue removal is tedious and any additional heating may damage the plastic. Most recycled bottles are used to make lower grade products. The bottles are hydrolyzed to a monomeric form and passed through a purification and repolymerization process to convert the bottles into food grade plastic. The plastic bottle recycle market is expected to grow at a steady rate during 2015-2019, fueled by growing demand for recycled plastic bottles and growing environmental concerns.

通过Fluke热像仪采集聚乳酸(PLA)在挤出吹膜过程中的温度场,研究冷却风风量(Q_v)及吹胀比对PLA吹膜过程中对流-辐射联合传热系数(h)的影响,同时对传热系数在低Q_v下和高Q_v下随高度的变化进行了拟合。结果表明,随着Q_v增大,温度下降速率增大;低Q_v下(Q_v=0,0.66 L/s),随着Q_v增大,h变化不明显;高Q_v下(Q_v=1.32、2.00 L/s),随着Q_v增大,在距口模出口高度(Z)为0~0.03 m内h增大明显;随着吹胀比的增大,温度下降速率增大,在口模位置处h增大明显;在不同Q_v下,h可近似表示为高度Z的函数。

介绍了完全生物降解的聚乳酸(PLA)/聚碳酸亚丙酯(PPC)共混物的研究进展,重点介绍了共混物的相容性、熔融及结晶行为、力学性能、流变性能及加工性能等方面的研究成果。

选用了邻苯二甲酸二辛酯(DOP)、乙酰柠檬酸三丁酯(ATBC)、乙酰柠檬酸三辛酯(ATOC)、对苯二甲酸二辛酯(DOTP)、偏苯三酸三辛酯(TOTM)及新型植物基增塑剂ID-37制备了增塑聚氯乙烯(PVC),对添加53份增塑剂的PVC的拉伸强度、断裂伸长率、硬度、180℃热稳定性等进行表征。结果表明,180℃时静态热稳定性DOTP与TOTM最优,DOP与ID37次之,ATBC与ATOC相当;增塑剂对力学性能影响较小,对硬度影响较大,其中DOTP与TCTM所增塑PVC的肖氏硬度(A)比其余4种增塑剂增塑PVC高约5度;TOTM及ATBC增塑PVC的玻璃化转变温度(T_g)相对较高,约为-22℃,其余4种较为接近,约为-25℃。

以六氯环三磷腈(HCCP)、苯酚、氢化钠为原料,碳酸钾为催化剂,丙酮为溶剂,在氮气保护下合成了六苯氧基环三磷腈(HPCP)。采用傅里叶变换红外光谱、核磁氢谱、核磁碳谱、核磁磷谱、差示扫描量热分析、热重分析技术对产物进行了表征。将HPCP作为阻燃剂添加到丙烯酸树脂中,测试了不同添加量HPCP的丙烯酸树脂的阻燃性和热稳定性。结果表明,当HPCP的添加量为20%时,丙烯酸树脂的垂直燃烧可达UL 94 V-0级,极限氧指数从17.5%增加到32.2%,空气中700℃时残留质量提高至18.95%,平均热释放速率和总热释放量分别降低至43 kW/m~2和37 MJ/m~2。