Light curing fiberglass winding tape

Instructions for Photosensitive Curing FRP Protective Cover Pre-impregnated Tape

1. Product overview

Photosensitive curing FRP prepreg tape is the first domestic brand product independently developed after summing up the advantages and disadvantages of similar foreign products. The development direction of this product is to be used as a protective material for pipeline directional crossing. Therefore, the product structure design of improving strength, increasing hardness, increasing rigidity, increasing toughness and reducing stress concentration caused by hollow drum is the highlight of this technology development. After one year of development and more than two years of application improvement, the photosensitive curing FRP prepreg tape has passed the test of dozens of pipelines crossing the joint application and the overall coating protection of two Xinjiang Hetian Caiyu rivers. The index is far ahead of other similar products at home and abroad, and the application is very mature technology products. The technologies we exclusively use on this product include: cloth felt composite weaving reinforced fiber technology, epoxy-polyurethane photosensitive resin, surface dispersion strengthening technology, extrusion dipping technology, embedded lap joint without hollow drum coating technology, flexible ring Bottom bonding technology of oxygen coating. Through the application of these technologies, the photosensitive curing FRP protective sleeve prepreg tape has the following technical performance characteristics.

Application of photosensitive curing glass fiber reinforced plastic prepreg tape as pipeline anticorrosion coating in the directional crossing of Yulong Kashi River in Hetian, Xinjiang

2. Product features

2.1 "High strength, high rigidity, high resistance to deformation. As a protection material for pipeline crossing, in order to prevent being torn by the gravel in the tunnel, the necessary performance is high strength and high resistance to deformation. Photosensitive curing FRP protective cover prepreg tape adopts advanced cloth felt composite weaving reinforced fiber technology and extrusion dipping technology, after curing, the tensile strength reaches 280MPa, and the anti-deformation load reaches 350N/5mm, which is other similar at home and abroad. 2-5 times of the product (the tensile strength of other products is less than or equal to 80MPa, and the deformation resistance load is 40-140N/mm).

2.2 "High toughness, high crack resistance. By using epoxy-polyurethane photosensitive resin, after curing the photosensitive curing glass fiber reinforced plastic protective cover prepreg tape, in the three-point bending test, it can be bent 5° without cracking. This index is twice higher than other similar products at home and abroad (other products do not crack at 2°) and the corresponding technical requirements for 3-layer PE and fusion bonded epoxy powder coating (see related technical standards). This ensures that under extreme conditions, the protective sleeve will not be crushed when subjected to large local deformations.

2.3" High adhesion to 3 layers of PE and fusion bonded epoxy powder coating. All the photosensitive glass fiber reinforced plastic protective sleeve products have no stickiness, and the bottom surface must be bonded through the low-coating material in the middle. Many people only consider the bonding strength in this regard, but do not consider whether the bonding material itself can withstand the force under the extreme crossing condition, so many bonding failures do not come from insufficient bonding strength, but from bonding Fragmentation of the material itself! To this end, our company has developed solvent-free flexible epoxy-based coatings. The coating is mutually soluble with the photosensitive curing glass fiber reinforced plastic protective cover prepreg tape. When used in combination, the bonding to steel reaches 13MPa (the level of double-layer epoxy patch coating), and the fusion bonded epoxy powder coating reaches 12.7MPa. The 3-layer PE coating reaches 4-10MPa (higher than the epoxy glass fiber reinforced plastic protective coating). The most valuable thing is that the coating has excellent flexibility and does not crack when bent at 5°, thus ensuring that the bonding will not fail under extreme crossing conditions.

2.4” High surface hardness. Like steel materials, in order to obtain high scratch resistance, abrasion resistance, and puncture resistance, surface hardening treatment must be carried out while improving the overall strength of the material, that is, the commonly used gears, tools, shafts and sleeves are all It is surface hardened. The surface hardening technology of the steel industry is also used in the production of the photosensitive curing FRP protective sleeve prepreg tape, and the dispersion strengthening technology is adopted to make the Barcol hardness of the photosensitive curing FRP protective sleeve used for the overall coating reach 70, while other similar products Only 40-50. Just imagine, what if the hardness of the photosensitive curing FRP protective sleeve exceeds that of the rock passing through the tunnel? We will usher in a lossless crossing!

2.5　Overall covering technology without hollow drum overlap. The hollow drum, especially the continuous hollow drum, is one of the main reasons for the damage of the pipeline through the outer protective coating. For this reason, our company adopts double-layer wrong edge production technology, so that the photosensitive curing glass fiber reinforced plastic protective cover prepreg tape has a wrong edge structure of two cloths, two felts and five oils. This product can completely eliminate continuous hoop lap joints. In the hollow drum area, and realize the four-sided bonding of butt joints to form the strongest protective layer. This kind of safest penetration protection structure can only be possessed by using photosensitive curing FRP protective sleeve prepreg tape.

2.6" high shrinkage rate. The photosensitive curing FRP protective sleeve prepreg tape has a high shrinkage rate of 1.5-3%. It is 10 times that of other products at home and abroad (1.5‰ for other products). What are the benefits of high shrinkage? It has the same meaning as the shrinkage of the heat shrinkable sleeve, and it is necessary for pipeline repair.

3、product offering form

According to different application requirements, such as ordinary buried pipeline patching, crossing pipeline patching, and crossing pipeline overall coating, corresponding products of different types and structures are designed. Among them, CND-500 is a glass fiber reinforced plastic structure with one cloth, one felt and three oils, which is suitable for ordinary buried pipelines; CND-870 is a two cloth, two felt and five oil structure, which is suitable for making joints through clay and soil; CND-870H Type is a structure product with two cloth, two felt and five oil belt surface hardening technology, which is suitable for making joints for gravel soil crossing pipelines;; CND-870HW type is a product with two cloth, two felt and five oil belt surface hardening technology, and staggered edge structure product, applicable The gravel and soil crossing pipeline is entirely covered. Each product is custom-sized according to the diameter of the pipeline, packed in a shading bag inside, and packed in a carton outside. Supporting materials include: special gloves, special rubber hammer, stretch film, transparent tape.

4、Product performance

Main technical performance index of photosensitive curing glass fiber reinforced plastic protective cover prepreg tape

5、product use

　　The joints of the ordinary pipe section of the newly-built pipeline, the joints of the newly-built pipeline horizontally crossing pipe section, and the overall coating of the newly-built pipeline horizontally crossing pipe section.

6、use reference

6.1　The construction of the light-curing protective cover must consider the weather, the humidity during the construction must be ≤70RH, and must have a cumulative direct sunlight exposure time of more than 12 hours within 48 hours after construction (only required for crossing pipelines).

6.2　The inner side of the light-curing protective cover is cloth, the outer side is felt, the cloth side faces the pipe, and the felt side faces outward. If it is wound upside down, the light-curing protective sleeve will not provide protection.

6.3　 For specific construction methods, see the technical specifications of the relevant structure.

6.4　The key and requirements of the construction technology of light-curing protective cover:

6.4.1” It is very important to block ultraviolet rays, which can greatly extend the effective operation time;

6.4.2 The end of the main operator must pass the top of the pipe, otherwise the deputy will loosen if it is tightened;

6.4.3 The tightening must start from the middle, so as to ensure that the concave part of the middle is contracted and squeezed;

6.4.4 The edges should be fit, without wrinkles as a whole, and the scotch tape should be in the correct direction and wrapped tightly to ensure the quality;

6.4.5 Construction quality requirements: fit, no wrinkles, and no edges up. For specific construction technology, please refer to the construction technical plan manual provided by our company.