行业快讯——瓦克力推两款有机硅离型图层

瓦克化学集团近日推出两种适用于中国标签行业的有机硅产品,一种是用于生产烘焙纸和离型纸的有机硅乳液DEHESIVE490,另一种是适用于纸张涂层的无溶剂型有机硅DEHESIVE906AMA。     

不干胶标签用有机硅离型剂的应用

有机硅离型剂又叫做防粘剂,涂布的离型层在不干胶标签中占总重量的比例很小,但却直接影响了整个标签的使用。着重从有机硅离型剂的种类、离型纸加工方法、离型纸生产中出现的缺陷及其标准、生产中需要注意的事项进行归纳和进行分析。     

皮革离型纸及其制造工艺细分

介绍了使用皮革离型纸和钢带制造人造革的2种方法,并对2种方法进行了比较。根据市场部反馈的最新信息,对皮革离型纸行业的市场状况和制造商进行了归纳。另外,还介绍了皮革离型纸的基本结构和材料组成。作者对不同厂家不同型号的皮革离型纸产品进行了大量的实验及及分析工作,并且结合各种专利及文献内容,根据皮革离型纸制造工艺的不同,对其产品种类进行了细分并详细描述了各类产品的原材料组成、工艺过程和产品应用范围。最后,介绍了公司在皮革离型纸开发方面所取得的成绩。     

行业快讯

<正>瓦克力推两款有机硅离型涂层瓦克化学集团近日推出两种适用于中国标签行业的有机硅产品,一种是用于生产烘焙纸和离型纸的有机硅乳液DEHESIVE 490,另一种是适用于纸张涂层的无溶剂型有机硅DEHESIVE 906 AMA。DEHESIVE 490是一种含非阳离子乳化剂的加成固化三组分有机硅乳液,低温也能迅速固化,并具有优异的离型稳定性和抗剪切强度。该产品常用于生产烘焙纸、离型纸、薄膜和压敏胶标签。DEHESIVE 906 AMA是一种完全无溶剂的加成固化有机     

碳纤维布成型机

碳纤维布成型机，包括接续设置的至少一可输送碳纤维丝的供线装置、一可将热熔黏着剂涂布于上、下离形纸上的上、下离型纸涂布装置、一热滚压单元、一冷滚压单元及一冷冻装置。该热滚压单元可使该上、下离型纸上的热熔黏着剂软化，并使该碳纤维丝均匀地黏布定位于该上、下离型纸间，该冷滚压单元可将该碳纤维丝压合定型于该上、下离型纸间，当该碳纤维丝通过该冷冻装置的强制冷却后，将该上、下离型纸剥离，即可得到一碳纤维布。     

人造革生产中离型纸的维护和保养

从多年的人造革生产实践中总结出离型纸较合理的维护保养工艺。该工艺大大延长了离型纸的使用寿命，提高了经济效益。     

专利文摘

一种热合防粘离型纸及其制造方法一种热合防粘离型纸及其制造方法 ,所述热合防粘离型纸有一层包装材料层 1,主要特点是 :该热合防粘离型纸还包括热合热熔胶层 2和隔离层 3。所述热合热熔胶层 2和隔离层 3均设在包装材料层1的一侧。即热合热熔胶层 2的一面附在包装材料层 1上 ,所述隔离层 3附在热合热熔胶层 2的另一面上。实验证明 ,使用本发明所涉及的热合防粘离型纸包装妇女卫生用品 ,避免了使用流延塑料包装膜的缺点 ,因为省去了隔离纸 ,包装和拆封迅速而容易 ,不仅提高了生产效率 ,而且有利于环境保护、可以达到保洁、防潮的包装效果。一…     

瓦克推出两款有机硅离型涂层

<正>在第六届亚洲国际标签印刷展览会(Labelexpo Asia 2013)上,瓦克推出两款适用于中国标签行业的有机硅产品:一款是适用于生产烘焙纸和离型纸的有机硅乳液DEHESIVE490;另一款是适用于纸张涂层的无溶剂型有机硅DEHESIVE906 AMA。     

简讯

日本加强车辆等用PVC人造革的开发日本阿奇丽斯(Achilless)公司在枥木县的山道工厂中新上一套离型纸法PVC人造革生产装置。与传统的压延法相比,离型纸法所产PVC人造革更加质轻柔软,特别适于车辆等领域应用。阿奇丽斯公司原有一套压延法生产PVC人造革的装置。现在又上一套离型纸法PVC人造革生产装置,使其可根据用户     

无溶剂聚氨酯人造革

1 前言聚氨酯仿皮人造革约在八十年代初在我国面市,它以质轻、透气、表面滑爽、外观酷似真皮而受欢迎。市面上以离型纸转移法生产的聚氨酯仿皮人造革最为多见。目前,我国有离型纸转移法生产线六十多条。工艺流程如下:     

膨润土的开发与应用

本文综述了膨润土在建材、高温润滑剂、钻井工业、纳米复合材料及催化剂等方面的应用。     

有机膨润土的合成及应用综述

介绍了有机膨润土的合成原理和方法及其在油漆、高温润滑脂，铸型涂料，纺织工业，钻井工业、化妆品等方面的应用。     

硅丙树脂涂料技术研究

研究了具有超耐久性的有机硅丙烯酸聚合树脂涂料特殊的分子结构。该涂料具有优异的耐沾污性、耐老化性、抗紫外光照射性及多功能性。     

Effects of urea formaldehyde resin to film properties of alkyd–melamine formaldehyde resins containing organo clay

Organo clay modified alkyd resins were prepared and these modified alkyd resins were cured with different ratios of melamine formaldehyde and urea formaldehyde resins in this work. Alkyds formulated to have oil content 40% were prepared with phthalic anhydride (PA), glycerine (G), coconut oil fatty acid (COFA), dipropylene glycol (DPG) and organo clay. “K alkyd constant system” was used for the formulation calculations of the alkyd resins. Alkyd resins were blended with 40% of a commercial melamine formaldehyde. The films of the alkyd–amino resins were prepared from 60% solid content xylene solutions using 50 μm applicators. After the films were cured at 140 °C for 2 h in an oven, properties of the films were determined. The film properties of the alkyd–amino resins such as drying degree, hardness, adhesion strength, abrasion resistance, water, acid, alkaline, solvent resistance, and resistance to environmental conditions were investigated. The addition of the urea formaldehyde resin and organo clay has positive effect on the physical and chemical resistance of the alkyd–amino resins.     

Comparison of In Situ Polymerization and Solution-Dispersion Techniques in the Preparation of Polyimide/Montmorillonite (MMT) Nanocomposites

In this paper, Polyimide/Montmorillonite Nanocomposites (PI/MMT NCs), based on aromatic diamine (4-Aminophenyl sulfone) (APS) and aromatic dianhydride (3,3',4,4'-benzophenonetetracarboxylic dianhydride) (BTDA) were prepared using in situ polymerization and solution-dispersion techniques. The prepared PI/MMT NCs films were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA). The XRD results showed that at the content of 1.0 wt % Organo Montmorillonite (OMMT) for two techniques and 3.0 wt % OMMT for the in situ polymerization technique, the OMMT was well-intercalated, exfoliated and dispersed into polyimide matrix. The OMMT agglomerated when its amount exceeded 10 wt % and 3.0 wt % for solution-dispersion and in situ polymerization techniques respectively. These results were confirmed by the TEM images of the prepared PI/MMT NCs. The TGA thermograms indicated that thermal stability of prepared PI/MMT NCs were increased with the increase of loading that, the effect is higher for the samples prepared by in situ polymerization technique.     

Removal of mineral material from solvent-refined coal by solvent extractions

Solvent refined coal (SRC), a coal extract which is highly polyaromatic in character and relatively high in N, O and S content, is derived from the direct liquefaction of coal. SRC contains mineral matter in the form of soluble organometallic compounds which can not be removed by filtration. These soluble species can be detrimental to the hydrocracking catalyst used in the upgrading of the SRC to high-value liquid fuels. These species, however, can be separated from the SRC by extraction with benzene or tetralin as solvents so that the mineral matter is mainly concentrated in the solvent-insoluble fraction, the other fraction are then readily hydrocracked, as demonstrated in this work.     

Combustion of silicon powders containing organic additives in nitrogen gas under pressure: 2. Composition of combustion products

Combustion of silicon powders containing organic dopants in nitrogen gas under pressure was found to yield a mixture of α-Si₃N₄, β-Si₃N₄, SiC, and Si₂N₂O. Relative amount of these compounds in combustion product was found to depend on the pressure of nitrogen gas, type and concentration of dopants, combustion geometry, and cooling rate. The formation of α-Si₃N₄ was found to occur in the presence of oxygen-containing dopants. The type of dopant was also found to affect the morphology of product particles.      

Some New Perspectives on Oxidation of Silicon Carbide and Silicon Nitride

This study provides new perspectives on why the oxidation rates of silicon carbide and silicon nitride are lower than those of silicon and on the conditions under which gas bubbles can form on them. The effects on oxidation of various rate-limiting steps are evaluated by considering the partial pressure gradients of various species, such as O₂, CO, and N₂. Also calculated are the parabolic rate constants for the situations when the rates are controlled by oxygen and/or carbon monoxide (or nitrogen) diffusion. These considerations indicate that the oxidation of silicon carbide and silicon nitride should be mixed controlled, influenced both by an interface reaction and diffusion.     

Oxidation of Silicon and Silicon Carbide in Ozone-Containing Atmospheres at 973 K

The oxidation behavior of a silicon wafer, chemically vapor-deposited SiC, and single-crystal SiC was investigated in an oxygen—2%–7% ozone gas mixture at 973 K. The thickness of the oxide film that formed during oxidation was measured by ellipsometry. The oxidation rates in the ozone-containing atmosphere were much higher than those in a pure oxygen atmosphere. The parabolic oxidation kinetics were observed for both silicon and SiC. The parabolic rate constants varied linearly with the ozone-gas partial pressure. Inward diffusion of atomic oxygen formed by the dissociation of ozone gas through the SiO₂ film apparently was the rate-controlling process.     

Nitridation behavior of silicon powder compacts of various thicknesses with Y2O3 and MgO as sintering additives

The effects of the nitriding temperature (1300 and 1350°C), holding time (0‐4 hours), and thickness of Si powder compacts on the nitridation behavior of silicon were investigated by examining the nitridation rates, analyzing phase compositions, and observing the microstructures of nitrided compacts. Si powder compacts doped with Y₂O₃ and MgO as sintering additives were prepared with thicknesses of 3, 6, and 9 mm. The phases of nitrided compacts were transformed from Si to α‐Si₃N₄ and β‐Si₃N₄ with an increase in the nitriding temperature and holding time. The degree of nitridation increased with the nitriding temperature and holding time. The β/(α+β) ratio increased with the nitriding temperature and holding time, and with a decrease in the thickness of the Si powder compacts. However, all compacts exhibited the same tendency for a higher β/(α+β) ratio at the compact surface than in the bulk of the compact. The variation in the β/(α+β) ratio for each compact decreased with an increase in the nitriding temperature and holding time.