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Fiberglass Mesh roughness experimental methods
2012-11-25
First, the scopeThis standard applies to the inspection of the glass fiber cloth (referred to as glass cloth) cloth roughness.Second, the definitionAn appearance defect due to the uneven part of the warp or weft elastic.2.2 glass cloth roughnessfiberglass fabric surface exceeds a predetermined the minimum droop distance of the cloth length (i.e. Oi... First, the scopeThis standard applies to the inspection of the glass fiber cloth (referred to as glass cloth) cloth roughness.Second, the definitionAn appearance defect due to the uneven part of the warp or weft elastic.2.2 glass cloth roughnessfiberglass fabric surface exceeds a predetermined the minimum droop distance of the cloth length (i.e. Oil uneven length) and the ratio of the length of the entire cloth, expressed in percentage.Third, the principleThe test appearance quality, a certain tension, the glass in the running Bushi Jia within a predetermined distance, the measured and accumulated glass cloth exceeds a predetermined minimum droop distance of the length and the length of the whole cloth, calculated irregularities.Fourth, the test equipment4.1 fiberglass fabric inspection machine (or similar uniform wire-speed take-up device).4.2 glass cloth flatness detecting means:4.2.1 Torque MotorDriven by big roll, reverse brake from the control to adjust the tension, the tension fluctuation is less than ± 15%.4.2.2 photorelayThe minimum monitoring under the cloth drooping distance, accurate to ± 1 mm.The 4.2.3 digital electronic timing deviceShould be recording Oil uneven time and the entire piece of glass cloth inspection time, accurate readings to 1 second.V. inspection productsThe whole match at both ends of the glass cloth 5-10 meters each excluding.VI test proceduresThe 6.1 checks photoelectric relay (located in the middle distance of 2 meters), in the ultra provisions the lowest sag distance, the light signal display.6.2 schematic diagram of the introduction of glass cloth cloth inspection machine. Glass cloth must be wound straight, parallel the weft and winding paper tube, not skewed.6.3 the reverse brake torque motor operation. Of cloth applied tension. To open digital electronic timing device, and zero car cloth inspection, accumulated cloth uneven time and whole cloth inspection time.6.4 appearance of the defect to be repaired, the parking, the glass cloth to stop running, timing device to pause the recording. Defect repair, car glass cloth continues to run, timing devices continue to accrue.6.5 is the end of the inspection glass cloth volume should immediately stop recording, retain their recorded values, and torque motor stops running.6.6 coiling after the end of the parking write down the the cloth uneven time and the whole cloth inspection time.VII results are shown7.1 cloth roughness ε,% calculated as follows:Wherein, t1 eleven Oil uneven time, seconds;t2-cloth inspection time, seconds.7.2 cloth roughness to the ε calculated to the nearest hundredth.7.3 cloth roughness ε does not exceed the specified value for qualified products; exceeds the specified value for substandard goods.Eight test reportThe test report shall include the following:a. Glass cloth article code, width;b. Prescribed minimum drooping distance;c. The fiberglass fabric tension or voltage of the input torque motor;d. Time cloth uneven;e. Match glass cloth inspection time;f. Cloth roughness;g. Marked qualified products or nonconforming;h. Not specified in the standard of any circumstances that may affect the test results. View Details
Glass fibers stitched fabric
2012-11-18
The English called such fabric knitted glass fabries, also translated knitted felt or woven carpet, actually It is different from ordinary fabric also felt different from the usual sense. The most typical stitchbonded fabric is a layer of warp yarns and a layer of weft yarn overlap, by stitching the warp yarn and continued yarn woven together into ... The English called such fabric knitted glass fabries, also translated knitted felt or woven carpet, actually It is different from ordinary fabric also felt different from the usual sense. The most typical stitchbonded fabric is a layer of warp yarns and a layer of weft yarn overlap, by stitching the warp yarn and continued yarn woven together into a fabric, this fabric was first the former GDR Malimo stitching machine production, the raw material is glass fiber rovings, the stitchbonded line organic fiber yarn. Initially it was used to substitute for untwisted coarse the gauze (Gebu).(1) the kind of the stitchbonded fabricCompanies in the United States in the 1980s for such fabrics extensive research and improvements to industrial production, and to achieve a series of product, currently it includes:a single-axis fabric, for example, all of the warp yarn, polyester yarn woven together;b biaxial fabric, that is composed of two layers of roving fabric, two layers of roving, but ± 45 angle or 0/90 arranged at an angle;c of triaxial fabric, i.e. three roving different direction alignment layers together, the angle can be ± 45,0 and ± 45, 90 of;d four-axis fabric, four fabric arranged angle such as ± 45,0,90;e. any structure and chopped glass fiber or carbon fiber mats are stitched together.Fibers are glass fiber fabric, Kevlar fibers, graphite - carbon fibers, high-strength glass fiber or mixed fiber suitable for manufacturing such a braid. This glass products and Gebu biggest difference is that, first of all, this roving knitted fabric reinforced material is straight to placement, roving in plain weave woven roving cross each other up and down, so no twist roving not was flat, but curved. Secondly this stitch-reinforced materials in two or more layers roving FRP products on the strength of directional requirements can be arranged in a variety of angles to accommodate.(2) The advantage of the stitchbonded fabrica. it can increase the limit of the glass fiber fabric laminate tensile strength, resistance to delamination under tension strength and flexural strength. Stitching reinforcing material is a flat lay-up, without bending, so when FRP impact load, stress immediately transferred from the tree to the fiber. In the same time, a situation between the fibers are not as Gebu cause breakage due to wear and the weft yarn., Stitched with polyester yarn plays braided composite FRP impact load resistance the crack spread expanded role, so that the layer shear minimize problems. This braid reinforced material between the layers, easy to layer. Shipbuilding industry this enhanced the boat test material increased by 65% relative to the strength of the roving, glass plate, 40% increase in rigidity.b. reduce the weight of the glass fiber fabric reinforced plastic products. Stitching enhancements the material analogy Gebu high strength, in the case without reducing the strength, can reduce the amount of fiber. E.g. 580g/m2 stitching reinforcing material may be substituted 800g/m2 Gebu 30% reduction, thereby allowing the weight of the fiberglass laminate, due to the reduced amount of reinforcement material, reduced to make the fiber wetting desired resin, which relative increase of the glass content. The fact that certain uses stitching reinforced FRP material may contain up to 65% of glass fibers. Stitch-reinforced materials looper, curled and empty, and thus neither consume the resin nor hinder resin flow. To participate in the Olympiad in rowing with this enhanced the material instead Gebu caused the boat to reduce the weight of 15%.c surface smooth fiberglass smooth surface. Stitch craft, the fiber laying flat, so the smooth surface for example, gingham, reducing the exposed fiber glass reinforced plastic products. The shipyard house well aware of The fiberglass surface waviness the less, the smaller the friction of the hull and the water, the faster boat traveling.In addition, it Gebu another different is: when it is after cutting the fibers are not spread trend, thereby eliminating the in FRP laminated surface fibers by "washing" out.d simplify the hand lay-up operations, and improve labor productivity. Because it is a combination of multi-roving, in addition, can be combined with chopped strand mat, hand lay-up FRP products to avoid trouble multilayer placement enhanced material, thereby simplifying the operation, improve operational efficiency.This reinforced materials FRP pultrusion and RTM instead of continuous strand mat, also can be used to replace the woven roving FRP pipe production centrifugation. View Details
Overview of the glass fiber architectural membrane structure
2012-11-18
Class A glass fiber fabric substrate coated with PTFE is made; B class, followed by glass fiber fabric substrate coated PVC made; C class is the three categories in most times, polyester (Dacron) fabric substrate coated PVC made. Coating material stars, polytetrafluoroethylene (PTFE), polyvinylidene fluoride the vinyl (PVDF), polyvinyl fluorid... Class A glass fiber fabric substrate coated with PTFE is made; B class, followed by glass fiber fabric substrate coated PVC made; C class is the three categories in most times, polyester (Dacron) fabric substrate coated PVC made. Coating material stars, polytetrafluoroethylene (PTFE), polyvinylidene fluoride the vinyl (PVDF), polyvinyl fluoride, ethylene (PVF), polyvinyl chloride (PVC), polyurethane (PU), such as rubber. U.S. Pavilion in the 1970 World's Fair in Osaka, Japan and Fuji Pavilion are used membrane structure, caused quite a stir in the construction industry. In the ensuing decades, the architectural membrane structure has been rapid development. Most of the membrane structure by steel and cable, and other combined with the structure of membranes gradually move towards the functionality, intelligence. Membranes with modeling the lightweight free, beautiful; translucent, energy-saving, environmental protection, excellent flame retardant properties; antifouling self-cleaning performance; safety, long life and other advantages. Based on these advantages, the emergence of architectural membrane, the membrane structure is known as the "21st century building used in the construction of large stadiums, entrance corridor, shopping mall, casino, parking, Fair Grounds, plant sightseeing Park. Architectural membrane are widely recognized standards JISA-93, Japan under the A, B, C three categories, based on the pros and cons of the fire performance division. Class A glass fiber fabric substrate coated with PTFE is made; B class, followed by glass fiber fabric substrate coated PVC made; C class is the three categories in most times, polyester (Dacron) fabric substrate coated PVC made. Coating material stars, polytetrafluoroethylene (PTFE), polyvinylidene fluoride the vinyl (PVDF), polyvinyl fluoride, ethylene (PVF), polyvinyl chloride (PVC), polyurethane (PU), such as rubber. PTFE architectural membrane. The PTFE membrane is in the fine glass fiber fabric coated with PTFE resin material. Such membranes have good welding performance, excellent UV resistance, aging resistance and flame retardant properties. In addition, anti-fouling self-cleaning is the best of all architectural membrane, but poor flexibility, difficult construction, the cost is very alarming. DuPont, Corning Fiberglass Corporation, Baird, construction companies, chemical fiber weaving company jointly developed under the leadership of the Geiger permanent membrane. Processing several fast fiberglass fabric into a Teflon melts, so both sides have the uniform fabric Teflon coating, so that the permanent PTFE membrane officially born. After permanent film structure formally popular in the United States, many scholars have carried out in-depth research on the membrane structure. Tracking test results show that after 20 years, this film material mechanical properties and chemical stability index declined by only 20% to 30%, the color is almost unchanged, the surface layer of the film is smooth, flexible, dust in the atmosphere, chemicals particles attachment and penetration is extremely difficult, to recoverability its original clean surface layer and the transparent rainfall construction film this enough to show the the PTFE membrane powerful vitality and broad market prospects. View Details
Glass fiber fabric technology introduced
2012-11-05
   Based roving fiberglass textile fabrics (woven roving), presented here is based on glass fiber yarn woven glass fiber fabric.1 glass cloth, glass cloth produced in our country be divided into two types of non-alkali and alkali. Abroad, the majority of non-alkali glass cloth. The glass cloth is mainly used for the production of ele...    Based roving fiberglass textile fabrics (woven roving), presented here is based on glass fiber yarn woven glass fiber fabric.1 glass cloth, glass cloth produced in our country be divided into two types of non-alkali and alkali. Abroad, the majority of non-alkali glass cloth. The glass cloth is mainly used for the production of electrical insulation laminates, printed circuit boards, a variety of vehicles, bodywork, tanks, boats, mold, and so on. In alkali glass cloth is mainly used for the production of coated packing cloth, as well as the occasion for corrosion resistance.     Glass fiber filaments, woven glass cloth with a diameter generally less to protect the glass fiber woven fabric in gμm in each track textile step not due to friction and bending damaged fibers in the drawing process have been granted on the textile-type wetting agents, foreign starch oil sizing, domestic use of paraffin sizing.    The raw yarn of the woven fabric of glass fiber fabric used without drying, after drying can be woven in a certain temperature and humidity, since the parts. The process of textile processing:     Weaving good gray fabric, wetting agents, and the slurry contains a certain amount, and a resin incompatible, and should, as far as possible removed before the steel is applied to the glass, and is covered with the coupling agent as required, in order to promote the glass cloth with the resin combination. Namely de-oiling and surface treatment. The process generally: the qualifying fabric - pre-deoiled - deoiled - surface treatment - testing - finished batches.    Determined by the characteristics of the fiber properties, Jingwei density, yarn structure and textured fabric. Jingwei density is determined by the yarn structure and textured. And density plus yarn structure. Will determine the physical properties of the fabric, such as the heavy reels, thickness and fracture tonicity.    There are five basic weave plain weave, twill, satin, rib and seats pattern.     (1) plain that each warp yarn (or weft). Alternately from the top and bottom of a weft (or warp) across the weave plain weave structure is the most stable. The canvas is the most dense, suitable for flat glass and steel products. Surface products must make plain hanging sexuality adaptation. Or move to cloth cut in order to adapt to this surface. Qi kinds of weave, plain weave structure lowest strength.    (2) twill warp and weft interwoven to form a textured three on the way. Better than the plain weave fabric, twill drape strength than plain cloth, soft to the touch, but the stability is worse than plain weave cloth. Generally has a thickness of 0. 23mm,    (3) satin weave weft a few on the way interleaving formed. Although the weave, such as the plain stable, but due to floating by floating weft longer. Bent fiber is small, so the higher strength of the plastic products made of glass fiber reinforced. Common satin fabric for need to drape hand lay-up, or pre-impregnated products. The thickness of the fabric of 0.20-0. 60mm.    (4) leno and mock leno at each weft pattern together two warp yarns organization. Which is characterized by good stability, thickness of approximately 0.13-0.18mm. The child needs minimal distortion and density is low place, such as a glass fiber fabric.    (5) seats Auctions refers to two or more warp yarns, in the interleaving of two or more weft yarns vertical organization. Seating pattern, though not as the plain stable, but it is more compliant, and better fit to a simple shape. View Details