Garment dipping

Garment dipping Garment dipping What is a wrinkle free shirt? A wrinkle free shirt is a garment that has been treated in such a way that it preserves its shape, smooth appearance and creases after laundering. If the garment is tumble dried, little Ironing or No ironing is required. Wrinkle free materials can withstand even the roughest of treatment. Even though Wool is much stronger than cotton, this method is mostly done with cotton fabrics. Cellulosic fiber containing fabrics are made resistant to creases by the use of a durable wrinkle- free process which is composed of the treatment of a cellulosic fiber with formaldehyde, a resin with a catalyst, a softener, polywax emulsion and an Optical Brightening agent. The process is carried out in conditions at which the formaldehyde reacts with the cellulose in the presence of a catalyst and a softener to improve the wrinkle resistance of the fabric and better tear strength after laundering with less treatment. The most common agents that crosslinks among themselves and results in the wrinkle free finishes are often the derivative of Urea. Figure 1.0 show the crosslinking between DMDHEU (dimethylol dihydroxyethyleneurea) and DMEU (dimethylol ethylene urea) Figure 1.0 Nowadays most of the wrinkle free shirts are being composed of cotton and synthetic fibers even if the label states 100% cotton. Due to the loose regulations, a list additional materials is necessary in the fabric if the secondary fibers exceed a certain percentage of the entire garment which affects its quality and may result in shirts that dont last as long as they should. Some wrinkle free shirts are not meant to be pressed at a professional dry cleaner because the more the temperature is , the more exposed the shirts are to the discoloration of the resins used during manufacturing. What are the components that the resin is made up of? 1) Catalyst A catalyst is asubstance that speeds up a chemical reaction, but is not consumed by the reaction; hence a catalyst can be recovered chemically unchanged at the end of thereaction .The rate and speed of the reaction is positively affected by the presence of a catalyst. It speeds up the reaction and allows a better flow For chemicals to react with the cellulosic fibers, the ingredients involved in the reaction should have a rearrangement of chemical bonds. Energy is needed to form the transition state and it is called the energy of activation. Reactants with lower energy cannot react with high energy ones and this is where the catalyst is used so that it provides a different route for the reaction. The catalyst allows a greater proportion of reactant species so that they gain enough energy to pass through the transition state and complete the reaction. This will result into the perfect distribution of chemicals throughout the shirts. 2) Softeners There are normally 2 types of softener that are being used and it depends on the structure, colour and resistance of the fabric being used. i) An elastomer softener is used and it is an innovative finishing agent, mainly composed of multifunctional polyurethane. It enhances wrinkle recovery and prevents wrinkle of fabric. The softener also gives perfect elasticity to the fabrics and it does not cause yellowing on white fabrics. It is a clear viscous liquid with a pH of 6.5 , a nonionic substance and it is very soluble in water. Normally 1-4 % of the weight of the fabric is added with a pickup of 80% maximum. Curing should be performed at 180deg maximum. ii) A Silicone softener is also used and it a highly concentrated softener normally found in gel form. Silicone normally delivers excellence in softness and smoothness of garments. It gives the garments a durable soft handle and very smooth feel. It also increases crease recovery, shape depth and brilliancy when applied on dyed fabrics. It is a transparent liquid and is a blend of amino silicones and urethane. It is a non-ionic substance with a pH of 7 and is soluble in water. A pickup of 70-80% should be used and maximum temperature should be around 130 degrees. 3) Optical Brightening Agent Fibers contain natural or contaminant coloring matters are generally subjected to decolorisation by the different bleaching methods therefore chemical treatments need to be done so that every substance are neutralized and an optical brightening agent is used. In order to use an optical brightener for textile application, it should have a good solubility, good fastness properties, build up properties, exhaustion properties, effect of water hardness, good leveling and penetrating properties, should not absorb light , compatible with the other chemicals in the concentration and should be stable and fast to the oxidative and reductive bleaching agents. Types ofWrinkle Free Process of Cotton Shirts: This concept of non-iron shirts existed since the very roots of cotton shirt making decades ago. Polyester and other fibers were firstly tried but the result was just a failure and it is then that the consumers got to know about the positive properties of the cotton fiber. The ability of cotton fibers to hold moisture and release it controlled makes cotton one of the best fibers among all. It has got a good breathability and gives a feeling of comfort to the user. Since some 15 years back, new methods have been established to use chemicals with the cotton fiber in order to make them almost wrinkle free and there are mainly 4 types of methods that are used: †¢ Pre- Curing †¢ Post- Curing †¢ Dip- Spin †¢ Vapor – Phase Pre- Cured fabric: The fabric used can be a 100% cotton fabric or a cotton blend and as compared to the other processes, this method does not require any further heat treatment as curing has already been done prior to the manufacture of the shirt. The already finished fabric is resistant to wrinkles already. Post- Cured fabric: In this system also, 100% cotton fabric or cotton blends can be used and the fabric will be delivered with the curing chemicals found inside. After the shirt had been manufactured, it has to be ironed entirely and hanged inside an oven indicating a temperature of 130 °C to 150 °C. Dip- Spin system: This method is the most commonly used process to manufacture wrinkle free shirts and can be used both for 100% cotton and cotton blends. After the full assembling of the shirt, it will be dipped into a mixture of chemicals which will be absorbed by the cotton fibers. The shirt being moisturized is kept in a closed bucket and will be pressed entirely. After pressing, the shirts will be placed onto a hanger and will be sent to cure in an oven of about 140 °C for 5 minutes maximum. This one belongs to the most popular process for wrinkle free shirts and can be used for 100 % cotton fabrics or cotton blends. After the shirt is manufactured as usually, it will be dipped into a mixture of chemicals, which will be absorbed by the cotton fibres. After the treatment in a tumbler the shirt is still moisturized and has to be pressed entirely.After pressing the shirt will be put on a hanger and can be cured in a curing oven by about 140 °C for about 3 -5 min. After the curing process is over, all wrinkles will tay for life. A re-touching by an iron is impossible. This is the process that I will be emphasizing more in the following pages. Vapor – Phase: This method cannot be practiced in many countries as very aggressive chemicals are being used. It follows the same system as the Dip Spin and is manufactured in the same way. After the last pressing, a special curing over is used instead of liquid chemicals, gas chemicals are used to make the shirt wrinkle free. The gas circulating throughout the oven and gradually penetrates the cotton fiber. The gas has to be extracted later on and the products need to be washed in order to remove the excess chemicals left inside. Garment dipping in Mauritius I have explained above about the different components and processes towards the production of a Non-Iron shirt on foreign lands. Coming now to Mauritius where this process was implemented only by Laguna Clothing in the year 2012. It was introduced on a pilot project and several testing were conducted before taking any command from their abroad clients. Gradually the different machines like the sprayer, dryer, bulk press and the oven were installed. After 1 year they started to get demands to produce Non iron shirts and at first they produced around 500 shirts per day but with the increase in commands, they had to boost the production and nowadays they produce around 1000-1200 shirts per day according to the client specifications. Batches of 80-90 shirts are sent for processing at one go and it take approximately 1 hour to complete 4 steps that is after the removal from the oven and an additional 4 hours to complete the finishing of the product. More details will be provided in the sections to follow. The department consists of 5 huge machines, the sprayer, 3 dryers and 1 oven. Bulk press machine .. GAIN MAXIMUM INFORMATION ABOUT THIS WITH CEDRIC How is the whole process carried out? First and foremost size segregation is a compulsory step that needs to be done in order to develop a rapid flow of work. Each size has got a specific mould. The first step that is done is the size segregration which enables a rapid flow of work during the whole process The second step is the preparation of the chemicals that would be injected into the shirts. The clothes are inserted into a chemical injecting machine and the process lasts only for some minutes and after that the shirts are sent into a pre drying machine where they are dried at 50 % and kept humid. The shirts are then sent for bulk pressing under huge pressing machines. There are 5 different machines and each part of a given shirt has got its own specified machine. The collar, back , front , sleeves and cuffs are pressed and all these processes has to be completed into a given time period. The shirts are then sent into an oven in order to cure them. Wooden hangers are normally used at the temperature is usually high. The shirts are then sent into the cooling room where water are sprayed on them to cool them down and bring pores back to original form. Shirts are tested and sent for rinsing 20 times and curing is done. Tensile and tear strength tests are also carried out to determine whether the cloth can be dipped A grab test is used for woven and non woven

Science Education Reform :: essays papers

Science Education Reform The entire purpose of educational reform is to improve the learning of the students. With that in mind, state governments have been and continue to implement programs in their school systems geared towards improving academic performance. Topics under consideration and implementation include lengthening the school day and, in turn, lengthening the school year. This would allow more time for more time for instruction. An important part of educational reform is the reform of teacher education. Nationwide, state school systems are improving the preparation and performance with more meticulous graduation requirements, performance based pay, and â€Å"career ladders† that will require the teachers to continue their education (Blosser, 1989). Most of this educational reform blossomed in the 1980’s, a period which is now referred to as the school reform movement. It was during this time that many of the ideas of educational reform came into public view. Science Teacher Education Most colleges in the U.S. require science teacher candidates to enroll in a vigorous course of study. There are many more areas of study beyond science necessary in order to adequately prepare the students for the teaching world (National Science Teacher’s Association, 2001). For example, at Towson University science education students must complete special education, psychology, communications, and information technology classes in addition to their core science and general education courses. These additional classes help to better prepare the candidates for what they might encounter in the professional world (www.towson.edu, 2001) Certification In the state of Maryland, there are many requirements to receive and hold certification to teach in the state. According to the Maryland State Teacher’s Association, candidates who wish to obtain certification must â€Å"possess an earned bachelor's degree or higher from a regionally accredited institution of higher education in a discipline appropriate to an assignment in the elementary or secondary school curriculum, receive an average of "B" or better in courses related to area of assignment, submit qualifying scores on teacher certification tests- Praxis I and II (Basic Skills and Content tests only), and complete 135 clock hours of study prior to employment as a resident teacher.† Basically, this means that the candidate must attend a four-year school and graduate with a degree. They have to get a B or better in their science and education courses, pass both Praxis exams, and complete one semester of student teaching.

Castle in Air Essay

Are messages like these popping up more and more in your workplace? Faced with complex, open-ended, ever-changing challenges, organizations realize that constant, ongoing innovation is critical to stay ahead of the competition. This is why we need to be on the lookout for new ideas that can drive innovation, and it’s why the ability to think differently, generate new ideas, and spark creativity within a team becomes an important skill. You need to work actively on building and cultivating this skill, and it can be done! Often, though, we make the mistake of assuming that good ideas just happen. Or worse still, we get caught in the mind trap that creativity is an aptitude; some people have it, others don’t. Then there is the other self-defeating belief – â€Å"I am not intelligent enough to come up with good ideas. † These assumptions are rarely true. Everyone can come up with fresh, radical ideas – you just need to learn to open your mind and think differently. This article shows you how to do so. How to Generate New Ideas Standard idea-generation techniques concentrate on combining or adapting existing ideas. This can certainly generate results. But here, our focus is on equipping you with tools that help you leap onto a totally different plane. These approaches push your mind to forge new connections, think differently and consider new perspectives. A word of caution – while these techniques are extremely effective, they will only succeed if they are backed by rich knowledge of the area you’re working on. This means that if you are not prepared with adequate information about the issue, you are unlikely to come up with a great idea even by using the techniques listed here. Incidentally, these techniques can be applied to spark creativity in group settings and brainstorming sessions as well. Breaking Thought Patterns All of us can tend to get stuck in certain thinking patterns. Breaking these thought patterns can help you get your mind unstuck and generate new ideas. There are several techniques you can use to break established thought patterns: * Challenge assumptions: For every situation, you have a set of key assumptions. Challenging these assumptions gives you a whole new spin on possibilities. * You want to buy a house but can’t since you assume you don’t have the money to make a down payment on the loan. Challenge the assumption. Sure, you don’t have cash in the bank but couldn’t you sell some of your other assets to raise the money? Could you dip into your retirement fund? Could you work overtime and build up the kitty in six months? Suddenly the picture starts looking brighter. * Reword the problem: Stating the problem differently often leads to different ideas. To reword the problem look at the issue from different angles. â€Å"Why do we need to solve the problem? â€Å", â€Å"What’s the roadblock here? â€Å", â€Å"What will happen if we don’t solve the problem? † These questions will give you new insights. You might come up with new ideas to solve your new problem. * In the mid 1950s, shipping companies were losing money on freighters. They decided they needed to focus on building faster and more efficient ships. However, the problem persisted. Then one consultant defined the problem differently. He said the problem the industry should consider was â€Å"how can we reduce cost? † The new problem statement generated new ideas. All aspects of shipping, including storage of cargo and loading time, were considered. The outcome of this shift in focus resulted in the container ship and the roll-on/roll-off freighter. Think in reverse: If you feel you cannot think of anything new, try turning things upside-down. Instead of focusing on how you could solve a problem/improve operations/enhance a product, consider how could you create the problem/worsen operations/downgrade the product. The reverse ideas will come flowing in. Consider these ideas – once you’ve reversed them again – as possible solutions for the original challenge. * Express yourself through different media: We have multiple intelligences but somehow, when faced with workplace challenges we just tend to use our verbal reasoning ability. How about expressing the challenge through different media? Clay, music, word association games, paint, there are several ways you can express the challenge. Don’t bother about solving the challenge at this point. Just express it. Different expression might spark off different thought patterns. And these new thought patterns may yield new ideas. Connect the Unconnected Some of the best ideas seem to occur just by chance. You see something or you hear someone, often totally unconnected to the situation you are trying to resolve, and the penny drops in place. Newton and the apple, Archimedes in the bath tub; examples abound. Why does this happen? The random element provides a new stimulus and gets our brain cells ticking. You can capitalize on this knowledge by consciously trying to connect the unconnected. Actively seek stimuli from unexpected places and then see if you can use these stimuli to build a connection with your situation. Some techniques you could use are: * Use random input: Choose a word from the dictionary and look for novel connections between the word and your problem. * Mind map possible ideas: Put a key word or phrase in the middle of the page. Write whatever else comes in your mind on the same page. See if you can make any connections. Pick up a picture. Consider how you can relate it to your situation. * Take an item. Ask yourself questions such as â€Å"How could this item help in addressing the challenge? â€Å", or â€Å"What attributes of this item could help us solve our challenge? † Shift Perspective Over the years we all build a certain type of perspective and this perspective yields a certain type of idea. If you want different ideas, you will have to shift your perspective. To do so: * Get someone else’s perspective: Ask different people what they would do if faced with your challenge. You could approach friends engaged in different kind of work, our spouse, a nine-year old child, customers, suppliers, senior citizens, someone from a different culture; in essence anyone who might see things differently. * Play the â€Å"If I were† game: Ask yourself â€Å"If I were †¦ † how would I address this challenge? You could be anyone: a millionaire, Tiger Woods, anyone. * The idea is the person you decide to be has certain identifiable traits. And you have to use these traits to address the challenge. For instance, if you decide to play the millionaire, you might want to bring traits such as flamboyance, big thinking and risk-taking when formulating an idea. If you are Tiger Woods you would focus on things such as perfection, persistence and execution detail. Employ Enablers Enablers are activities and actions that assist with, rather than directly provoke, idea generation. They create a positive atmosphere. Some of the enablers that can help you get your creative juices flowing are: * Belief in yourself: Believe that you are creative, believe that ideas will come to you; positive reinforcement helps you perform better. * Creative loafing time: Nap, go for a walk, listen to music, play with your child, take a break from formal idea-generating. Your mind needs the rest, and will often come up with connections precisely when it isn’t trying to make them. * Change of environment: Sometimes changing the setting changes your thought process. Go to a nearby coffee shop instead of the conference room in your office, or hold your discussion while walking together round a local park. * Shutting out distractions: Keep your thinking space both literally and mentally clutter-free. Shut off the Blackberry, close the door, divert your phone calls and then think. * Fun and humor: These are essential ingredients, especially in team settings.

How to Use the Irregular French Verb Recevoir

The French verb recevoir (pronounced ruh-say-vwah) is one of the more challenging to learn because its highly irregular once you get into the past tense and other conjugations. Translated as to receive or to get, this verb is so irregular that it doesnt fit in any pattern.   Usage Recevoir is whats commonly known in French as an irregular ir- verb. These verbs dont follow the regular patterns of conjugation, so students have to memorize them individually. Other ir- verbs include:  asseoir, courir, devoir, falloir, mourir, pleuvoir, pouvoir, recevoir, savoir, tenir, valoir, venir, voir  and  vouloir. Verbs that end in -cevoir are conjugated the same way. These include: apercevoir   to catch sight of, to foreseeconcevoir  Ã‚  to conceivedà ©cevoir  Ã‚  to disappointpercevoir  Ã‚  to perceiverecevoir  Ã‚  to receive Uses and Expressions The table below includes only simple conjugations of the irregular French -ir verb recevoir. It does not include compound tenses, which include a form of the auxiliary verb avoir and the past participle. recevoir une salaire to get paidrecevoir un prix to be awarded a prize / to be given a prize or awardrecevoir un cadeau to get / receive / be given a giftrecevoir  courrier /  coup de tà ©là ©phone to get mail /  to get a telephone callVeuillez recevoir, Madame, lexpression de mes sentiments les meilleurs  ou  mes salutations distinguà ©es Yours sincerelyrecevoir un coup sur la tà ªte to receive a blow to the headrecevoir  quelquun à   dà ®ner   to invite someone to dinnerJai à ©tà © mal reà §u. I was made to feel unwelcome.La maison peut recevoir six personnes. The house sleeps six people.Le mà ©decin reà §oit/ne reà §oit pas aujourdhui. The doctor is / isnt seeing patients today.se faire recevoir   to get told offJe nai de conseils à   recevoir de personne  ! I dont have to take advice from anybody!Elle sait merveilleusement recevoir. Shes a marvelous hostess. / Shes marvelous at entertaining. Simple Conjugations of the Irregular French -ir Verb Recevoir Present Future Imperfect Present Participle je reois recevrai recevais recevant tu reois recevras recevais il reoit recevra recevait nous recevons recevrons recevions vous recevez recevrez receviez ils reoivent recevront recevaient    Pass compos Auxiliary verb avoir Past participle reu Subjunctive Conditional Pass simple Imperfect subjunctive je reoive recevrais reus reusse tu reoives recevrais reus reusses il reoive recevrait reut rect nous recevions recevrions remes reussions vous receviez recevriez retes reussiez ils reoivent recevraient reurent reussent Imperative (tu) reois (nous) recevons (vous) recevez