Cutting Edge Environmental Technology For Manufacturing-Books Pdf

Cutting edge Environmental Technology for Manufacturing
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F Takeuchi et al Cutting edge Environmental Technology for Manufacturing Processes. 2 Water based paint technology Resin particle Water. Water evaporation, VOCs which are among the substances that cause. photochemical smog due to a photochemical reaction Drying by. in the atmosphere are mainly contained in paints heating. printing inks adhesives cleaning agents and gaso Particles approaching. line The Ministry of the Environment reports4 that to bond. paints account for about 40 of the emissions of VOCs. Accordingly reduction of the VOCs contained in paints Image of film formation of water based paint conventional. is an important issue in order to conserve the global emulsion. environment, Paints consist of components that provide a film. and some solvents that volatilize The components 2 Development goal. include resins and pigments to impart colors and shiny Switching the paints used for ICT equipment such. brightness The solvents are used to dissolve the res as servers and PCs to water based paints has posed. ins and also added for diluting to play important role problems up to now in terms of the drying process and. in making it easier to apply them Because organic the required coating performance One problem with. solvents are mainly VOCs switching from such solvent conventional water based paints is that plastic hous. based paints to water based paints where the solvent ings used in ICT equipment cannot endure high drying. is mostly water is effective for reducing VOCs temperatures that are needed to facilitate bonding. and they become deformed In addition paint that is. 2 1 Development and evaluation of water applied to housings of ICT equipment requires a high. based paint coating performance including a high hardness good. 1 Comparison between solvent based paints and adhesion chemical resistance light resistance and. water based paints designability, Solvent based paints contain resins dissolved in For the new water based paint we have set a. the solvent and the resins are coated by volatilization of development goal of achieving both a high coating. the solvent This gives them an excellent film forming performance and low temperature drying of 80 C or. property Thinners can be selected out of various sol below which allows plastic housings to be coated In. vents with different levels of solubility and volatilizing view of manufacturing facilities we have also aimed to. speeds and mixed together for optimization according realize workability and facilities that are comparable to. to the purpose of use those of the current ones, Meanwhile water based paints are generally 3 Evaluation methods. emulsion paints in which resin is not dissolved in water The performance required of paint films may vary. but exists as fine particles As illustrated in the image depending on the application For application to ICT. of film formation of a conventional water based paint equipment especially mobile devices higher perfor. shown in Figure 1 evaporation of water brings the mance is needed As a primary evaluation appearance. resin particles closer and they bond together thermally inspection adhesion evaluation by cross cutting and. to form a continuous film It means that the quality pencil hardness testing are conducted Equipment that. of the bonding is directly reflected in the quality of the may be frequently touched with the hands is checked. physical properties of the coating film The diluting sol for resistance to cosmetics including hand creams and. vent is only water A small amount of organic solvent OA cleaners in addition to generally used solvents such. is mixed in as an auxiliary agent that remains on the as alcohols In this check chemicals are applied on the. base material to facilitate bonding after volatilization test sample and it is left to stand for a certain period. of water There is only a small choice of solvents and to confirm that there is no change in the appearance. therefore it is important to optimize resins to improve and that hardness and adhesion are maintained This. the film forming property with this limited selection process is carried out for artificial sweat as well On the. assumption that the equipment will be used in various. FUJITSU Sci Tech J Vol 50 No 4 October 2014 61, F Takeuchi et al Cutting edge Environmental Technology for Manufacturing Processes.
environments temperature and humidity cycling tests with a low Tg for the shell For the base materials. are also conducted PC ABS polycarbonate acrylonitrile butadiene stylene. 4 Selection of resins and PC containing glass fiber were used and an evalu. For dilution water is used for water based ation was conducted on the respective materials The. paints and no functionality can be expected for water results showed that the requirements were satisfied for. Accordingly the degree of optimizing resins is the most both film forming property and coating performance. important factor that affects both film forming prop including hardness. erty and the physical properties of the coating film. As resins to use we focused our attention on acrylic 2 2 Environmental friendliness evaluation. and urethane based resins and their glass transition This new water based paint developed has the. temperatures Tg selected some resin types to make organic solvent content reduced by approximately 80. paints and evaluated the physical properties of the as compared with the same amount of a solvent based. coating film The drying condition used was 70 C for paint as shown in Figure 3 The amount of volatilized. 30 minutes and this condition does not cause the plas organic solvent or the amount of VOCs is reduced in. tic to deform the same way, We confirmed that both the acrylic and urethane A trial calculation of the amount of crude oil con. based resins with high Tg were capable of ensuring sumed for producing paints has given a result that is. pencil hardness Urethane dispersion showed a coat approximately 54 smaller for water based paint than. ing film with a good appearance but had a problem for solvent based paints Water based paint is a one. with resistance to chemicals and artificial sweat Acrylic pack type and so there is no need to consider the pot. emulsion on the other hand did not have sufficient life Neither hardeners nor diluting organic solvents are. film forming property and cracks appeared in the sur needed This not only leads to a saving in limited crude. face It is difficult to ensure both a good film forming oil resources but also contributes to reducing various. property and a high coating performance with one kind types of environmental impact as secondary effects in. of resin and we mixed two kinds of resin to make paints cluding the energy required for mining processing and. However increasing the amount of urethane based transporting resources. resin reduced the resistance to artificial sweat and in. creasing the amount of acrylic based resin reduced the 2 3 Application to products. chemical resistance and it was not possible to find out We have developed a water based paint that can. a composition that satisfied all requirements be used for plastic housings and applied it to parts. To address this problem we considered an emul such as the main unit front panel of two models of the. sion with a core shell structure as shown in Figure 2 UNIX server SPARC M10 released in 2013 Figure 4. We used different kinds of acrylic based resins to im As compared with conventional solvent based paints. prove the film forming property and ensure hardness. a hard resin with a high Tg for the core and a soft resin. Composition rate, Shell soft resin with low Tg Water. Water evaporation 60, Core hard resin with high Tg Solvent. 80 reduced Pigment, Drying Resin, Resin particle by heating. Bonding accelerated, by resin in shell, Hardness ensured.
with resin in core Solvent based paint Water based paint. Figure 2 Figure 3, Image of film formation of newly developed water based Comparison of composition between solvent and water. paint based paints, 62 FUJITSU Sci Tech J Vol 50 No 4 October 2014. F Takeuchi et al Cutting edge Environmental Technology for Manufacturing Processes. have been developed ahead of regulations and ap, plied across the Fujitsu Group. 3 1 Trends of regulations on phthalate, Phthalate esters are in widespread use as plasti. cizers to primarily soften polyvinyl chloride PVC At. the same time DEHP which is produced in the largest. quantities of all phthalate esters poses a problem of a. potential health impact and its use for toys and nursery. items is regulated in Japan the U S and EU In the EU. Front cover coated with water based paint it has also been classified into the carcinogenic muta. genic and reprotoxic substances group as a substance. of concern and was included in the Authorization List. this paint can reduce the amount of crude oil used for of the REACH regulations on February 17 2011 In ad. one panel by 54 and the amount of VOCs by 80 dition it is considered as a candidate for next round. Housings of ICT equipment are often made of plastics regulation under the EU RoHS Directive However. and switching these paints to a water based paint can it has been difficult to detect by a simple acceptance. significantly reduce environmental impact such as the inspection with an attenuated total reflectance ATR. generation of VOCs We intend to expand the applica Fourier transform infrared spectroscopy FT IR because. tion of this paint while considering the materials of of the lower detection sensitivity limit with reference to. housings the design quality and production volume the regulation value and the influence of other addi. tives in test samples Accordingly we have attempted. 3 Technology to identify presence of to develop a vapor collection pretreatment method for. phthalate esters a simple acceptance inspection, Lately commercialized products have been re.
quired to meet various global regulations for hazardous 3 2 Issues with present analysis methods. chemical substances such as the EU RoHS Directive Typical analysis methods for phthalate esters. and the Registration Evaluation Authorization and include gas chromatography mass spectrometry GC. Restriction of Chemicals REACH regulations enforced MS which allows a high accuracy measurement of. in 2009 that especially have a significant impact on the type and concentration of a phthalate ester and. the Fujitsu Group s products The Fujitsu Group has es FT IR which cannot identify the type but is capable of. tablished basic policies and rules in relation to design verifying whether or not phthalate esters are included. and manufacturing of products to deal with regulated in a product if they are contained at a concentration of. chemical substances contained and built a framework about 10 wt The former requires expertise such as. for their operation and management 5 Within this test sample pretreatment with organic solvents and. framework Fujitsu Laboratories is responsible for the data analysis many person hours and expensive anal. development of some technologies to identify the pres ysis equipment which makes it difficult to apply to an. ence of regulated hazardous substances as selecting acceptance inspection The latter does not require com. materials at the design stage and accepting materials plicated sample pretreatment and provides a method. in manufacturing In particular screening analysis suited for screening that can detect a phthalate ester. methods for the acceptance inspections are required to by determining absorption peaks of 1 2 substituted. be simpler and more efficient Up to now proprietary benzene which are characteristic structures of phthal. technologies for example a pretreatment method that ate esters The FT IR equipment is less expensive than. can polish and sample an electrode plating material on GC MS as well However it has issues to address such. a sheet of lapping film6 to detect lead Pb within the as the insufficient detection sensitivity of 10 wt as. plating on chip part with X ray fluorescence analysis compared with 0 1 wt specified by the regulation of. FUJITSU Sci Tech J Vol 50 No 4 October 2014 63, F Takeuchi et al Cutting edge Environmental Technology for Manufacturing Processes. the RoHS etc and the difficulty in detection due to the on a collection film. influence of other components including color materi 3 Absorb the vaporized material homogeneously. als and additives contained in test samples made of into the collection film. products To fulfill these requirements a number of temper. ature conditions must be set appropriately including. 3 3 Development of vapor collection the duration and temperature of the sample s heating. method the temperature of the collection film and the spacing. To solve these issues as described above we of the heating and collection surfaces in consideration. have developed a vapor collection method Figure 5 of radiant heat It is also necessary to ensure that. a simple test sample pretreatment method In this the test environment is managed in ways such as the. method the plasticizing components such as phthalate setting the collection film thickness and providing. esters in test samples are evaporated by heating the partitions to prevent the vapor from diffusing In ad. test samples and the vapor is collected on a thin film dition in order to make this method suitable for use in. consisted of pure PVC thereby concentrating the plasti an acceptance inspection it is necessary to improve the.

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