结皮

PVC结皮发泡材料的制备及工艺

Preparation and technology of PVC skinning and foamed materials

发泡剂热分解特性及对硬质PVC挤出发泡结皮厚度及泡孔结构影响

Effects of Blowing Agents ' Thermo Decomposition Characteristics on Skinning Thickness and Cell Structure of Rigid Extrusion Foam Sheets

要不时地搅拌牛奶蛋糊，防止其表面结皮。

Stir the custard occasionally to prevent a skin forming .

一次C3锥部结皮的分析处理

A Coating Analysis and Treatment on the Cone of C_3 Cyclone

在此基础上，导出化学固沙结皮的弹性模量E和蠕变函数公式，并数值模拟了沙床上的结皮在集中载荷作用下的变形。

Then the crust deformation of on sand bed is simulated under concentrated load .

利用国产设备挤出PVC结皮发泡异型材的研究

Extrusion of Crusted Foamed PVC Plastic Profile with Domestic Equipment

硬质低发泡结皮PVC板材制备工艺的研究

Study on the Preparation Process of the Rigid Low-Foamed Surface Crusting PVC

PVC钢塑共挤结皮发泡异型材的制造

Manufacture of surface crusting and foaming profile for PVC steel-plastics coextrusion materials

结皮发泡PVC塑料板材生产技术和质量影响因素

PVC foam board production technology and quality-affecting factors

结皮低发泡硬质PVC管材生产技术

Technique for Manufacturing Rigid , Crustal and Low Foaming Poly ( vinyl chloride ) Pipes

PVC结皮发泡异型材的木纹挤出

Wood-grain Extrusion of PVC Foamed Skinning Profiles

木纹结皮发泡PVC异型材的挤出

Extrusion of Wood-Grain Skinned Foamed PVC Profiles

降雨及聚丙烯酰胺（PAM）作用下土壤的封闭过程和结皮的形成

Sealing Process and Crust Formation at Soil Surface Under the Impacts of Raindrops and Polyacrylamide

此外，有结皮的土壤降雨侵蚀与前期含水量（C）、坡度（S）、降雨动能（PI）呈正相关。

In addition , rainfall-erosion with crust soil is related with the earlier stage water content ( C ), sloping degree ( S ) and rainfall power ( PI ) .

亚气生藻类在草原中生长时往往形成藻类结皮，藻类结皮的存在对土壤温度、土壤的含N量、土壤的保水性等都有一定的影响。

The vegetation of subaerial algae in grassland usually combine as algal crust , and the presence of algal crust have somewhat influence on soil temperature , soil nitrogen content and soil water-holding power etc.

土壤（特别是黄绵土）在雨水作用下，表面会形成结皮，显著地降低降雨入渗率，聚丙烯酰胺（PAM）能有效地抑制降雨过程中土壤结皮的形成，提高降雨入渗率。

Summary Surface crust of soil , especially Loess , formed under the impact of raindrops will significantly affect rain water infiltration rate .

HPVC结皮发泡板材挤出成型工艺探讨

Inquiry of Extrusion Technology for HPVC Skinning Plate Foam

聚丙烯酰胺（PAM）是一种新型高效土壤结构改良剂，对适宜的土壤它可抑制土壤表面结皮，增加土壤水分入渗。

PAM is a new and high efficient agent for improving the soil structure . It can control surface crusting of eligible soil and increase infiltration .

各类客车座椅坐垫扶手，电动车座椅坐垫扶手，工程机械座椅坐垫扶手等开发性PU自结皮制品；

Our main products are development PU self-formed leather products , such as seat handles for different kinds of passenger cars , e-bikes , and engineering and machinery seat ;

采用人工模拟降雨溅蚀方法，通过采样制作土壤切片，研究聚丙烯酰胺（PAM）对黄土结皮形成的影响。

Through rainfall simulating in laboratory , and observation on soil sample slices , this study intended to disclose the impact of polyacrylamide on the development of loess soil surface crust .

促进作用主要是由于生物结皮的存在改善了土壤表层0-5cm的养分及水分状况；

Biological crust improved nutrient and water condition of0-5cm soil surface , thus there was positive effect .

防止SLC-S型窑系统结皮堵塞的操作体会

Operation experience on preventing the coating and clogging fo SLC S kiln system

0.5～3mm藻结皮对土壤入渗的促进作用最大，其初始入渗速率和达到稳定入渗时的累积入渗量均高于无结皮土壤。

Algae crust with 0.5 ~ 3mm thickness had the greatest promote effect on soil infiltration , soil initial infiltration rate and cumulative infiltration all was higher than soil without algae crust .

而在2mm/min雨强下，第二、三场降雨过程中，三种红壤糙度都有不同程度的增加，其中HS由于结皮不易被破坏，因此增加幅度最小。

However , under 2mm / min rainfall intensity , roughness of the three soils increase with different degrees during the second and third rainfall . The crust of HS is not easy to be destroyed , thus its roughness increase least .

实验表明，经PAM处理后土壤的入渗性能和抗侵蚀的性能都有所提高，PAM能明显地黏结着土壤表面的颗粒，形成大的团聚体，阻碍土壤结皮的形成，减少土壤侵蚀。

Experiments showed that the soils treated with PAM had better infiltration and stability properties . With cohering significantly with particles of soil at surface , forming bigger aggregates and halting the formation of crust , PAM can provide erosion control and benefit infiltration .

未除草有结皮时固沙试验区0～80cm各层平均含水率均比对照区高，其中土层平均含水率比对照区高76.27%。

Besides , the average moisture content of the soil layer between 0 ~ 80 cm in the unweeded experimental area was 76.27 % higher than that of the control one .

与无结皮土壤相比，3～7mm藻结皮使土壤初始入渗速率减小了26%，而累积入渗量增加了8%。

Compared to soil without algae crust , algae crust with 3 ~ 7mm thickness reduced soil initial infiltration rate by 26 % , but the cumulative infiltration increased by 8 % .

随着结皮厚度的增加土壤容重有降低的趋势；与无结皮土壤相比，最大减小值为0.09g/cm3。

The soil bulk density decreased with the increase of algae crust thickness . The largest value of soil bulk density decrease was 0.09g/cm3 compared to soil without crust .

在降水不足200mm的条件下，结皮的形成改变了土壤水分的传导，有限的降水在沙土层中的时空分布发生了变化，使深根系的灌木逐渐衰退，浅根系的植物得到了发育。

Under the condition of less than 200 mm precipitation , the presence of microbiotic crust changes the soil hydraulic conductivity , alters the temporal and spatial distribution of the limited precipitation in sand layer and leads to the decline of deep_rooted shrubs .

结果认为，结皮的形成是以细砂和粗粉砂为骨架，以小于0.01mm的细小颗粒填塞土壤空隙的一个物理过程，其腐殖质含量几乎与土壤相同，而碳酸钙含量则略低。

Crust formation is a physical process that the framework formed by fine sand and coarse silt is filled by small grain ( 0.01 mm ) . The content of humus is nearly same as that of soil while the content of CaCO 3 is slightly lower .