针织女装各部位尺寸受弹性影响的变化规律

对5种不同弹性、不同组织的针织面料进行立体裁剪试验，测量了女装上衣23个部位的尺寸，将所得数据用概率统计的F检验法处理，并与机织物进行对比，得出不同弹性的针织面料在裁剪时各部位尺寸的变化规律和各部位尺寸缩放数值。     

针织女装备部位尺寸受弹性影响的变化规律

对5种不同弹性、不同组织的针织面料进行立体裁剪试验,测量了女装上衣23个部位的尺寸,将所得数据用概率统计的F检验法处理,并与机织物进行对比,得出不同弹性的针织面料在裁剪时各部位尺寸的变化规律和各部位尺寸缩放数值.     

基于面料弹性贴体针织衣身数学模型的建立

为研究针织面料样板结构与弹性变化的定量关系,首先进行针织面料弹性试验,在此基础上对选用的针织面料进行立体裁剪,得到基于针织面料弹性的针织衣身样板,并将其制成贴体型梭织衣身样板作为穿着尺寸样板。经针织与梭织样板比较分析,研究针织样板各部位尺寸间的变形规律。运用SPSS数学工具通过回归分析,建立针织样板各部位横向尺寸的数学模型。依据理论计算值与样板实际值,最终建立针对不同弹性针织面料贴体衣身样板细部尺寸间变化规律的数学模型,提高了样板设计效率。     

贴体型针织女上装原型纸样设计研究

针织面料因具有弹性,在进行服装设计时,其细部尺寸不再是一种简单的比例关系,因此比例分配法、原型法不再适用。以面料测试数据为依托,以设计贴体型针织服装基础纸样为目的,先通过对4种针织面料进行弹性拉伸率的检测,再通过其在不同规格人台和真人身上衣片各部位的立体裁剪测试,得到不同尺寸的贴体型针织女装样板数据。运用数理统计法比较分析立裁所得样板,研究贴体原型定寸的数学原理,进一步推导出贴体型针织女装原型各部位计算公式,提出贴体型针织女上装原型纸样的处理办法,建立贴体型针织女装基本纸样。     

针织服装原型与针织面料性能关系初探

以7种常用针织面料悬垂系数、面密度测试以及定伸长条件下拉伸力、弹性回复率、塑性变形率、应力松弛率的性能测试为基础,运用立体裁剪的方法试验得到零松量下针织原型各部位尺寸,通过灰色模型建模分析得出影响针织服装原型各部位尺寸的主要因素.     

基于面料性能的合体针织上装结构设计优化

文章从合体西装和连衣裙结构设计角度出发,分析探讨针织与机织面料性能的差异,以及性能差异对服装外观和合体性的影响,并进行样板修正。实验选择典型机织平纹织物和针织圆纬衬垫织物为服装面料,对其进行硬挺度、悬垂性、拉伸弹性的测试,制作165/88A的西装和连衣裙样衣,对比分析服装横向维度、纵向长度以及斜向部位的尺寸差异,探讨面料不同性能对成衣上身尺寸的影响。实验结果表明:针织西装的肩部位置易发生变形,可适当将肩点内收0~0.3 cm,背宽内收0~0.4 cm;对于纵向尺寸较大的针织服装如连衣裙等,使用288.03 g/m2左右的面料时可在0~1 cm范围内缩短上衣长及裙长;结合针织面料横、纵和斜向的弹性伸长率可得到各部位样板的优化尺寸,即机织样板尺寸×各部位的尺寸变化率。     

高弹针织女上装紧身原型纸样设计

针对针织服装设计原型法对于高弹力的针织服装难以控制样板尺寸变化的问题,通过立体裁剪的试验方法,测试了高弹性针织面料在不同规格人台和真人身上衣片各部位的数据,运用数理统计的分析方法,研究了紧身原型定寸的数学原理,获得了高弹针织女上装紧身原型纸样。通过实例证明,只需要根据面料的弹性和服装造型特点对原型纸样进行适当的数据变化,即可满足紧身针织服装合体性、舒适性及美观性的要求,为弹性针织面料服装纸样设计提供了更直接、更实用的模板。     

针织服装原型变化规律探讨

分析7种常用针织面料和一种机织面料在不同松量条件下包覆人台的状态,探讨针织服装原型各部位及胸背部浮余量变化规律,为解决工业化针织服装生产中胸围加放量、面料弹性性能与肩胸省关系等问题提供一些参考。     

针织毛衫V形领尺寸分析研究

研究了针织毛衫V形领尺寸变化规律。在标准人台的基础上，在横开领开宽量一定的情况下，采取胶带进行标识的方法．用软尺分别测量不同直开领开深量下针织毛衫V形领前、后领口弧长尺寸，     

刍议针织服装产品标准中的尺寸变化率

水洗尺寸变化率是针织服装服用性的重要考虑因素之一。选取两组试验,一组试验对不同材质和类型的针织服装产品采用相关标准进行检测,另一组试验研究不同干燥方式对服装水洗尺寸变化率的影响,探讨针织服装产品标准中尺寸变化率的影响因素,提出建议和措施。     

谷氨酸分批等电结晶中晶种表面积及其粒径对产品粒度分布的影响

在谷氨酸分批等电结晶过程中,添加晶种与否直接影响产品的粒度分布(CSD)。通过在谷氨酸结晶过程中添加不同晶种的方法,研究晶种表面积及其粒径对结晶的影响,以期获得谷氨酸分批等电结晶中添加晶种的最优条件。实验结果表明,对于平均粒径不同的晶种,添加的晶种表面积存在临界值Sc使得此时得到的产品粒度分布均匀,中位径(D50)最大。当晶种平均粒径位于67.3～91.9μm,晶种表面积为50 cm2时得到的产品D50最大、CSD最好,即该晶种粒径对应的Sc不大于50 cm2;晶种平均粒径位于103.7～117.7μm时对应的Sc为100 cm2;晶种平均粒径为154.8μm时对应的Sc不小于250 cm2;当晶种平均粒径大于235.9μm时得到的CSD为双峰。表面积相同时,与粒径小的晶种相比,粒径大的晶种破碎率大、吸收溶质的速率小,所以晶种粒径越大表面积临界值越大。     

水溶性聚酯浆料酯基结构对上浆性能的影响

为研究水溶性聚酯浆料的酯基结构对其上浆性能的影响并探索聚酯浆料对纯涤纶经纱的上浆配方,选取不同的二醇类单体,合成出2类具有不同酯基结构的水溶性聚酯浆料,再通过与酸解淀粉共混进行上浆实验。结果表明:水溶性聚酯浆料酯基的化学结构对其上浆性能影响显著,以乙二醇为酯基结构单元的聚酯浆料有利于改善其使用性能;在淀粉浆料中加入水溶性聚酯可以显著提高对涤纶经纱的浆纱性能,其用量为20%时浆纱性能较好。     

Comparative analysis of mechanical properties of size films

The advent of very high speed shuttleless looms has increased the importance of sizing. Starch has been the most popular and economic size material. Synthetic binders are also being blended with starch to improve weaving loom efficiency. Some synthetic size materials have got restrictions in use mainly because of ecological reasons. In the recent years, many modifications have come up in the starch as a sizing agent. Different modifications give different properties, which can be suited for particular application. In the present study, a comparative analysis of different varieties of natural starch, modified starch and synthetic size materials have been carried out for their cohesion power, adhesion power, abrasion resistance and bending rigidity. Comparison is made between various varieties and also among different blends to see the effect of blending on different mechanical properties of size film. The effect of lubricant on properties of size film is also examined. In general, it is observed that paste characteristics and film properties of synthetic and modified starch are better than the natural starch.     

一种用于过滤布等效孔径测量的方法

利用液体压强随深度增加和冒泡试验法原理,设计出一种通过稳定冒泡现象测量过滤布等效孔径的方法.此法首次将样品垂直放置,气体和液体被分置于样品两侧,使样品上液体压强分布不同,而气体压强分布相同.气体压强将气泡顶出液体侧,气泡冒出的数量随液体深度的增加而减少直至消失.在样品上测得任意6点的孔径值,取平均值作为等效孔径,用不确...     

浆液的相对粘度与绝对粘度

通过测定变性淀粉,PVA,聚丙烯酸类等几种常用浆料及其不同配比混合浆的相对粘度与绝对粘度值,指出了相对粘度与绝对粘度之间的数值关系不存在唯一的对应性,主要受浆料种类,配比类因素的影响,并对纺织厂浆纱工序制定浆液粘度这一工艺参数提出了参考意见。     

无机浆料添加剂对淀粉性能影响的测试

为研究纳米级无机浆料添加剂对淀粉浆液浆膜性能的影响,自制两种纳米级无机浆料添加剂JN1和JN-2,并分别按不同比例与淀粉浆液进行混合,测试混合浆液的浆液浆膜性能.结果表明:纳米级无机浆料添加剂对淀粉浆液粘度和粘度热稳定性基本无影响,不会与淀粉发生化学反应;能明显提高淀粉浆液对纯棉纱和涤棉混纺纱的粘附性能,不同的纳米级无机浆料添加剂对淀粉浆液粘附性能的提高程度也不同,但对淀粉浆膜的耐磨性能没有改善.     

充气保暖服装的充气尺寸变化率测试与应用

充气保暖服的充气尺寸变化率直接影响其样板的制作设计,为更好地掌握二者之间的关系,测试了6种不同充气面料同种压胶形状,在30%、50%、70%、100%这4种不同充气状态下,经纬向的充气尺寸变化率变化情况。结果表明:充气量与充气尺寸变化率有较强的正相关关系;不同面料在相同充气状态下,经向尺寸变化率均大于纬向尺寸变化率,并且当充气状态达到70%左右时,经向尺寸变化率增幅减弱,而纬向尺寸变化率逐步变小。通过分析得到充气服最大经纬向充气尺寸变化率,可作为充气服基本长度和围度之外,所需增大尺寸的设计参考,根据推板式放量方法,将充气尺寸变化率应用到充气保暖服装样板尺寸设计中。     

Preliminary study of lake dissolved organic matter in light of nanoscale supramolecular assembly

Large-scale preparative high-performance size-exclusion chromatography (HPSEC) was performed to separate different molecular size fractions in milligram quantities from strongly colored dissolved organic matter (DOM) of a freshwater using a very mild conjugate acid-base pair (10 mM acetic acid-sodium acetate solution at pH 7.0 with an ionic strength of 6 x 10(-5)) as the mobile phase. The homogeneity-uniformity of different molecular size fractions in relation to their combined original mixture was verified by an analytical HPSEC system. In addition to molecular size distribution and basic spectroscopic characteristics, Fourier transform infrared spectroscopy was applied to specify structural features for different size fractions. The results demonstrate clearly that only a very small amount of conjugate organic acid-base pair is required to generate a powerful resolution for a DOM mixture, and very strong treatments with organic acids are not necessarily needed to reach a better SEC resolution. Most essential is the combined outcome of different HPSEC experiments and determined structural functionalities which indicate that almost all original DOM solutes are aggregated mixtures consisting of different associations possessing various molecular size ranges, which can be separated from their integrated whole as nearly homogeneous and uniform species. In summary, the present study strongly speaks for the need to direct the research of natural dissolved and colloidal organic carbon more strongly toward a nanoscale study of supramolecular assemblies. More precise knowledge about the primary, secondary, and tertiary structure of dissolved DOM constituents has its essential function, e.g., for environmental protection and utilization of surface waters.     

各级打叶风分单元分离片烟的尺寸分布变化规律

利用五打十一分打叶机组对上部烟配打模块进行梗叶分离,研究了打叶去梗工序中各级打叶风分后片烟的尺寸分布变化规律。结果表明:各级打叶风分单元分离出的片烟尺寸在各面积区间内的比例变化趋势基本一致;其中第一、二级打叶单元内各风分口的大中片比例均94%,较为稳定,且片烟特征尺寸及超大片比例均随风分级数的增加呈上升趋势,第三、四/五级打叶单元内片烟特征尺寸及超大片比例显著降低,小片率明显升高;各级打叶单元汇总片烟的特征尺寸及均匀性随打叶级数增加逐渐降低。     

An analysis of influence factors of sports bra comfort evaluation based on different sizes

The purpose of this article was to find the main influence factors of sports bra comfort evaluation of different sizes women (small/medium size; large size) of different styles commercial sports bra. Thirty-one women in different bra sizes were chosen to evaluate 11 different styles sports bras. According to different sizes, the main influence factors were extracted by factor analysis and all the product samples were classified by Q-cluster analysis. And the comfort evaluation results of different two sizes were compared to find the differences. The results find that breast stability, wearing comfort and breast shape are the three key factors for sports bra comfort evaluation. By comparison of comfort evaluation results of different two sizes, the conclusions show that the large size is more concern about shoulder strap pressure, breasts gather effect, cup inclusiveness and lower breast stability, while the small and medium size pays more attention to the possibility of wearability factor. A classification-positioning model of sports bra products was established. The results can provide theoretical basis and guidance for the research and comfort evaluation of sports bras for underwear enterprises, and also provide reference value for women customers.