全三维等温凸模吸塑成型过程数值模拟

吸塑工艺已成为薄壳塑件成型的最佳工艺.利用适用于黏弹性流体的通用模拟软件Polyflow建立了凸模吸塑成型过程完整的数值模拟方法,该方法可以非常形象直观地预测吸塑制品成型过程中厚度的变化及分布情况,并且可通过调整成型工艺参数较快地、经济地获得理想制品,为新材料吸塑成型及新吸塑产品研发设计合理的吸塑成型工艺,提供可靠的理论计算数据.     

陶瓷吸塑模具制备的工艺研究

本文研究了一种陶瓷吸塑模具，并着重阐述了陶瓷吸塑模具的材料、性能和特点以及该模具在制备过程中工艺路线和工艺要点。     

吸塑模具抽芯机构设计方法

针对吸塑成型工艺特点，介绍了一种吸塑模具抽芯机构设计方法。包括抽芯机构设计方案分析、抽芯机构运动及力学分析、抽芯机构结构设计要点。     

酒类包装用PET吸塑制品及其常用卷材的耐候性研究

PET吸塑制品的限位作用在酒类包装中运用很广泛,为保证酒瓶在装卸和运输过程中完好,吸塑制品的抗冲击强度是酒类包装行业的重要关注点。本文通过对试制的四种吸塑常用PET卷材进行物理性能测试、按月制成吸塑件后进行冲击测试、制成吸塑件后按月进行冲击测试来收集相关数据,以分析PET吸塑制品及其常用卷材的耐候性。     

PP片材吸塑制品生产工艺

本文重点介绍了ＰＰ片材吸塑制品的设备分类、成型方法、模具、工艺条件控制要点等问题，并充分展示了产品的市场前景。     

改性聚丙烯吸塑薄片的生产技术

聚丙烯薄片具有卫生性能好、密度小、能在较高温度下使用的特点,并具有较高的机械性能和化学稳定性。用它吸塑成型的容器,将是理想的食品包装材料,属国家重点发展的食品吸塑包装材料的更新换代产品。但是,由于聚丙烯是结晶性聚合物,在结晶熔化前,几乎没有高弹态区域,薄片的强度     

吸塑制品冲切技术

介绍目前我国吸塑制品冲切技术；冲切设备加工原理，刀模制作，冲切工艺，为吸塑制品加工行业的发展，开发及应用提供有关参考资料。     

浅谈吸塑、发泡填充工艺在载重汽车发动机罩、地垫生产中的应用

如何提高载重汽车发动机罩、地垫的隔热、吸音、减震效果，以改善驾驶室内的工作环境，已成为目前汽车内饰行业重点研究的课题。吸塑、发泡填充工艺在此领域得到了较好的效果，本文简述了载重汽车发动机罩、地垫的发展史和吸塑、发泡填充工艺，此工艺可提高外观质感、降低制造成本、操作简单、投资较少且适合大批量生产。     

一种冰箱内胆吸塑模具抽芯机构的设计

根据冰箱内胆产品塑件的结构、技术要求,对吸塑模具抽芯机构进行了分析和设计。     

冰箱门胆真空吸塑成型模具抽芯机构设计

在充分分析斜滑块抽芯机构运动及受力状态的基础上，介绍了一种利用脱模力抽芯的非气动抽芯机构设计方法，采用该方法设计的冰箱门胆吸塑模具结构紧凑、抽芯可靠、生产效率高。     

Analysis of Critical Debonding Pressures of Stressed Thin Films in the Blister Test

This paper reports a model for the relationship between critical debonding pressures and the work of adhesion of thin films in the blister test. Previous models have neglected the possible role of residual stresses in the film on the critical pressure. The model reported here shows that these stresses may have a large effect on the relation between the critical pressure and the work of adhesion. A similar model is developed for an alternative blister geometry, the annular or “island” blister. It is shown that films which cannot be peeled using the standard blister test (due to exceeding the tensile strength limit of the film before initiating a debond) can be peeled by varying the geometric parameters of the island blister.     

Quantification of Coating Adhesion Using Laser Induced Decohesion Spectroscopy

We present a new technique, laser induced decohesion spectroscopy (LIDS), which is capable of measuring the practical work of adhesion G between a transparent polymer coating and an opaque coating or substrate. In LIDS, a laser pulse directed onto the sample creates a blister at the transparent/opaque interface. The blister's internal pressure depends on the laser pulse energy, and at a critical pressure the sample fractures, creating an annular debond similar to that obtained in the standard blister test. By measuring physical variables such as the curvature of the blister, and its radius and thickness, it is possible to deduce G, Here we measure G between an automotive clearcoat and four opaque basecoats of various pigmentations (black, white, red, metallic green) as a function of clearcoat thickness. We find that G depends on pigmentation due to the various pigment volume concentrations (PVC's) and specific pigment-binder interactions. Also, G depends on the clearcoat thickness when the thickness is comparable with the size of the plastic zone, R_p.     

六种药剂防治向日葵白锈病试验研究

六种药剂防治向日葵白锈病田间药效试验结果表明,25%甲霜灵WP1000倍、50%安克WG2500倍的防效分别为87.6%和86.8%,显著优于64%杀毒矾WP800倍(防效75.7%),而52.5%抑快净WG1000倍、72%霜疫必克WP600倍和80%乙磷铝WP600倍的防效相当,不理想,均未达到50%。经方差分析证明处理间差异达到显著水平。     

The constrained blister test for the energy of interfacial adhesion

The constrained blister test (CBT) was designed to measure the energy of interfacial adhesion ( y) of polymeric films and coatings. Theoretical analysis of the CBT established a relationship between blister growth and interfacial parameters of the form A(t) A(t₀)=exp[βp²h ph-γ (t- t₀)] where A(t) is the blister area at time t, p is the applied pressure, h is the spacer height, y is the energy of interfacial adhesion, and β is a dissipative coefficient which is also related to geometric factors. The validity of the theoretical model was tested using a rubber-based pressure sensitive adhesive (PSA) tape. The PSA tape was investigated as a function of the applied pressure and the spacer height. A value of 44 J/m² was determined for the energy of interfacial adhesion. The dissipative coefficient, β, was found to vary with the applied pressure and the spacer height.     

压延机自动划泡装置

为解决压延过程中因胶片含有过多气泡而产生的胶帘布压摞质量问题,设计安装了压延机自动划泡装置。该装置主要由上划泡装置,下刈泡装置,主动辊和链轮等组成,主动辊由压延帘布带动,上划泡装置和下划泡装置由主动辊右边的双排链轮链条带动,划泡装置上与上辊和中辊相触的钢针有规律地划破上胶睡和下胶处事的气泡,彻底消除胶片中的气泡。     

高岭土在水性涂料中的遮盖力研究及应用

本文通过用不同的方法处理的高岭土，证实高岭土经超细化和适当温度的煅烧，可以增加其在水性涂料中的遮盖力，在一定的范围内可以代替钛白粉，立德粉等白色颜料，降低涂料成本。     

电泳缩孔事故的原因分析及对策

介绍电泳缩孔事故的分析思路、解决过程及采取的对策。     

关于浮法玻璃中气泡的分析

针对浮法玻璃中气泡这一缺陷,从它的分类及产生原因两方面作了重点阐述,并简单给出减少气泡产生的几种有效方法.     

水性汽车罩光清漆的制备

研究了汽车通用水性罩光清漆的生产工艺,通过试验确定了最佳工艺条件:润湿剂用量为0.5%;消泡剂用量为0.5%;增稠剂用量为0.4%;水性多功能助剂用量为0.5%。通过对生产工艺条件的研究,使汽车水性罩光清漆的施工适应性大大提高,为水性罩光清漆大面积推广奠定了坚实的基础。     

Effect of interlayer deformation on blister test

The effect of interlayer deformation on blister test for measuring adhesive strength was analyzed by modeling the interlayer as a Winkler foundation. Critical load for the initiation of debonding along the interface between the interlayer and an elastic thin film was obtained as a function of the adhesive strength, interlayer deformation, elastic modulus of Winkler foundation, and blister size. The critical pressure increases with increasing the elastic modulus of Winkler foundation. The propagation of debonding was discussed, and the arrest of debonding was observed for the condition of constant deflection. The results provide a rational for characterizing the effect of interlayer deformation on the measurement of adhesive strength from a blister test.