After coating the surface of the book cover and other printed products, the products often appear to be not bright or blistering or wrinkling. Now talk about the handling of common problems in operation. 1. Temperature control In rainy or rainy seasons, if the temperature is not adjusted properly, the coated product will not shine. There is obvious water vapor on the silicone roller, which is caused by the paper absorbing a lot of moisture. At this time, the temperature of the hot pressing roller can be adjusted to 40 degrees Celsius. If the temperature is too high, it will foam. Some hydrosol laminating machines do not have a heating device, and it is necessary to add a drying lamp before pressing to dry the adhesive layer and reduce foaming. 2. Pressure control When laminating, the pressure should be adjusted according to the thickness of the paper, generally 5Pa. If the pressure is too high, it will cause film wrinkles and paper deformation. 3. Glue control The amount of glue is controlled by the gap between the glue roller and the glue roller, and the scraping film is added. Scratch film has a large amount of light glue and a small amount of heavy glue. The amount of glue should be well controlled, so that it can be coated evenly without generating crystal points. If the amount of glue is too large, it will make the product dull. Care should be taken during the gluing process to prevent the tiny particles and impurities after the gel solidifies from remaining in the rubber tray. If it is stuck on the scratched film, a white offset will be produced, causing linear blistering. Before starting the machine, clean the upper roller and the rubber hopper with alcohol-based solvents. If the upper roller is not cleaned, it will cause needle-eye blisters. The glue containing impurities can be diluted with water. After the impurities are precipitated, it is used as a thinner to reduce the waste of glue. 4. Roller cleaning When the paper is separated, the glue will directly roll on the silicone roller, which will cause accumulation, which is easy to wrinkle the product or affect the brightness of the product. The roller should be cleaned frequently to keep it clean. The drum itself will wrinkle when it is uneven and needs to be replaced. 5. Temperature and humidity control The temperature and humidity of the environment change greatly, and the paper absorbs moisture to produce a "lotus leaf edge". When the film is coated, the paper is easy to wrinkle, and the balance of temperature and humidity should be maintained. If the temperature of the heating roller is too high, the tight edges of the paper will also wrinkle, and the temperature needs to be controlled as required. 6. Paper feeding control The skewed paper will wrinkle the paper, so be careful when handling, make the paper even, and the pressure is the same on both sides. When feeding paper, try to stack each paper by 3mm, and control the amount of glue to prevent the overflow of glue. This can reduce the adhesion of products after coating. If the connection is wrinkled or blistered, the pressure should be increased appropriately to maintain the temperature and humidity balance, so that the adhesive will be flat and reduce blistering. 7. Film roll control Prevent wrinkles caused by inconsistent tension on both sides of the film roll. First select the film with the same elasticity on both sides, and then adjust the tension on both sides of the film to make it balanced and prevent wrinkling. When laminating the film, try to use the film size plus the width of the opening size. For example, if the size is 16 format, try to use 44Omm wide film instead of 460mm wide film, which can save 4% of the cost. When using a 780mm wide film for the 16 format, trim as much as possible to reduce the amount of glue and save glue. 8. Do not use additives in printing, control the amount of powder sprayed Try not to use additives during the printing process, because it is not easy to dry, and it is easy to blister after coating. And also need to control the amount of powder spraying. Before the lamination, arrange someone to wipe the powder on the cover to reduce the phenomenon of lamination or blistering and make the product bright. 9. Machine speed control In the process of laminating, do not change the speed of the host at will. The speed is too fast, and the glue cannot meet the requirements. When the speed is slightly increased, the amount of glue is too large. If the speed is adjusted too low, the amount of glue is reduced and it is easy to foam. In order to ensure that the amount of glue is basically the same, the speed of the laminating machine can be limited to 60% of the highest speed, so that each class runs at the specified speed, and data management is implemented to reduce unnecessary losses. Metal Zipper
Chemical Reaction Example: acidic compound and chromium compound [Cr2O3] → Black [CuO, red [CuO2] or blue [CuSO4].
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Zipper Metal,Metal Zippers,Zippers Metal,Metal Zip,Roll Zipper Shenzhen Yiyixing Zipper Manufacture Co.,Ltd , https://www.nicekeychain.com
Metal zipper zipper belongs to one of the microphones refers zipper teeth made of copper, aluminum or copper-nickel alloy material produced zipper, resin zipper and Nylon Zipper compared in terms of, more durable, and more for jeans, jackets and backpacks.
Features: Rugged, higher cost
Divided according to the size: # 3, # 4, # 5, # 7, # 8 and so on, depending on the size microphone size zipper teeth change. Because it is often used in the jeans, jackets and backpacks, so its dimensions are larger zipper.
classification:
1. TYPE: closed zipper,
Opening zipper (detachable),
Double closed end zipper (X- zipper with double slider zipper with two opposite or O- double slider two opposite), double open end zipper (Inverse open detachable)
2. Mi tooth Material: Existing material type of aluminum, brass, copper-nickel alloy, zinc alloy. Color metal microphone teeth often as needed electroplated, such as aluminum plated microphone yellow teeth, tooth-plated brass microphone white, black nickel, bronze, red bronze, gold and other colors.
Metal zipper Composition:
And other similar zippers, metal zippers composition is formed by a cloth belt, microphone teeth, slider, limit codes.
Tape: Material generally fiber belt, cotton or polyester fibers with a belt, can choose different materials depending on the application.
Mi teeth: the market for the production of metal zipper and more aluminum, brass, copper-nickel alloy, zinc alloy and other materials made of, since the color on the metal zipper teeth are plated microphone up, if improperly stored, the teeth will turn black microphone clothing and would cause pollution. For microphone tooth copper alloy is prone to oxidation, so when you save to ensure a certain degree of ventilation, do not sealed, do not save in the moisture-laden environment, if necessary, have to use the moisture-proof paper or desiccant.
Slider: metal slider respectively bronze color, red bronze plating, white, yellow-plated, black nickel, black nickel, matte silver, under normal circumstances, the color of the metal slider requires a microphone with a metal zipper teeth the same color. According to regulations, common slider parameters are:
3 # metal slider opening height of 2.1-2.2mm, mouth wide as 4.55-4.65
5 # metal slider opening height of 2.7-2.8mm, mouth wide 6.0-6.05
Limit code: divided into upper stop (front yard) and bottom dead center (post code). The main role is to prevent the upper and lower retaining slider from microphone teeth.
Note:
In the garment washing or processing time, pay attention to:
A wool knitwear after being ironed, to ensure adequate cooling can after zipper packaging, otherwise,
After the metal zipper will react with steam generating, easy to change color. Second, in the clothing trade processing, it tends to remain certain chemical reagents, then it is easy to react and metal zippers. Therefore, prior to assembly of metal zippers, leather has been the need to ensure adequate for cleaning and neutralization.
remind
Since there are different zip adaptability in different environments, so in the selection and purchase of the zipper when you choose must inform the manufacturer of the zipper on the application in which products, and manufacturers have to inform you of the fastener component requirements, such as You can be a pin detection and so on. Further, generally prohibit the use of azo dyes in the composition, as the dyed fastener after contact with body induce certain diseases.
Maintenance tips:
First, the science of using a metal zipper:
1, when the metal zipper pull, it must be close to both sides of the tooth, must be aligned to the top, then head down the track holds metal zipper pull gently, not too much force to pull.
Metal zipper
Metal zipper (2)
2, when moving the metal zipper should be careful not to hem skirts or other debris caught in the metal zipper in order to avoid "crooked teeth", "belly", "off the teeth" and so on.
3, if the metal zipper astringent, not easy to pull, do not dead lift, put some wax or soap on top of a metal zipper, you can pull.
4, if the metal zipper teeth unilateral differences rope, wear loose hair, available in popular tiger clamp closed end of the metal zipper lateral gently clip, metal zipper immediately changed for the better, unilateral teeth together tight, no broken loose.
Second, to prevent metal zipper moisture, oxidation, rust and discoloration.
1, to avoid contact with the moist environment: because the metal zipper metal oxide due to the dip caused by tooth portion has a black phenomenon.
2, avoid contact with rubber band: Because rubber band itself contains sulfides, when bundled with rubber band metal zipper, metal chain teeth will have vulcanized phenomenon (black).
3, should be cleaned and dried after washing with water: because the fabric dye or residual chemicals and metal parts redox reaction, metal parts may cause discoloration.
Cause of Color Changes
a, copper alloy (copper-nickel alloy, copper, brass) made of metal zipper discoloration of reasons:
When used in the metal or hair products, metal zippers metal due to oxidation caused most of the teeth have a black phenomenon. This is because when the bleach manufacturing process of cooked skin leather woolen products agents on the process and remains in the product, the product gas can cause discoloration of the metal zipper.
Examples of chemical reactions: oxidizing bleach (H2O2) → black (CuO) or red (CuO2);
b, rubber bands bundle of metal zipper color reasons:
Rubber band itself contains sulfides, when the rubber band bundle metal zipper, metal chain teeth will have vulcanized phenomenon (black).
Chemical Reaction Example: excess gas sulfides or HS2 conditions → black [CuS]
c, contact with an acid or chromium compound causes discoloration.