33 results about "Glassine" patented technology

The invention relates to the technical field of papermaking, and particularly provides label release paper and a preparation method thereof.The label release paper sequentially comprises a release layer, a bottom coating layer and a base material paper layer from top to bottom, and the release layer comprises polydimethylsiloxane; the bottom coating layer comprises an organic silane coupling agent; the base material paper layer sequentially comprises a surface layer, a modified paper layer and a bottom layer from bottom to top; wherein the surface layer and the bottom layer are both glassine paper; the density of the glassine paper of the surface layer is 1.15-1.20 g / cm < 3 >; and the density of the glassine paper at the bottom layer is 1.05-1.10 g / cm < 3 >. Polydimethylsiloxane is selected as the release layer, the release force of the adhesive can be remarkably reduced due to the fact that polydimethylsiloxane has ultralow surface energy, and the crosslinked polydimethylsiloxane layer is high in chemical inertness, low in heat resistance and moisture migration resistance, not prone to migration after being stored for a long time and easy to form chemical combination with the bottom coating layer, so that the adhesive force is improved.

The invention relates to a method for manufacturing glassine paper having a basis weight of less than 50 g / m2, wherein an optimal combination of BSKP, BHKP and BCTMP is used to adjust the properties of the fiber furnish. In glassine papers with very low basis weight the formation of the paper web upon paper manufacturing may be controlled by means of the fiber furnish optimization, which can be used to produce exceptionally thin glassine paper without downgauging and without adverse effects to other paper properties, which would prevent the use of the glassine paper as substrate layer in a release liner. Thus glassine paper with a moderate share of BCTMP in the fiber furnish may be produced, that has quality characteristics of the paper sufficient for use as a substrate layer of an industrial release liner.

The invention relates to the technical field of papermaking, and particularly provides glassine paper and a preparation process thereof.The preparation process of the glassine paper comprises the steps that S100, larch pulp, eucalyptus pulp, glass fibers and polyester staple fibers are mixed, TEMPO-oxidized nanocellulose is added, pulp is prepared, after the pH is adjusted to 4.5-5.2, a composite bio-enzyme system is added for stirring treatment, and after stirring treatment is conducted, the glassine paper is obtained; adding a polycarboxylic acid cross-linking agent and a catalyst for cross-linking reaction to obtain cross-linked modified slurry; s200, carrying out wet-process papermaking molding, dehydration and drying on the cross-linked modified pulp to obtain a paper blank; s300, immersing the paper blank into a Tris buffer solution of dopamine hydrochloride, coating with a sizing agent, drying and curing, and carrying out calendering treatment to obtain a paper surface; and S400, carrying out corona treatment on the paper surface, and coating a release agent to obtain the glassine paper. The glassine paper prepared by the invention has excellent heat resistance, oil resistance, tear resistance and good release performance, and is suitable for food packaging and industrial release materials.

This invention addresses the issue that while there is a corresponding relationship between the components and oil absorption value in the glassine paper coating process, this relationship is non-linear and cannot be easily predicted. Therefore, it provides a soft measurement model based on SA-PSO-LSSVM to predict the oil absorption value of glassine paper. This model enables accurate detection of the oil absorption value in the glassine paper coating process, providing a quick method for optimizing the glassine paper coating process. It uses real daily production data from paper mills and is applicable to the actual production activities of most paper mills.

The utility model provides medical glassine paper single-face coating equipment which comprises a supporting bottom plate, a supporting frame, a coating unit and a coating structure, the supporting frame is fixedly installed on the surface of the supporting bottom plate, the coating unit is fixedly installed on the surface of the supporting bottom plate, and the coating unit is located in the supporting frame; the smearing structure is fixedly installed on the section, outputting glassine paper outwards, of the supporting frame. An input roller is rotationally mounted at one end of the supporting frame; an output roller is rotationally mounted at the other end of the supporting frame; due to the arrangement of the coating unit and the coating structure, silicone oil is uniformly coated, and the silicone oil can be quickly cured.

The present invention relates to a fungal glassine paper with high transparency and high hydrophobicity based on liquid fermentation and a preparation method thereof, belonging to the field of biomaterials. The present invention mainly solves the problems of low transparency and poor hydrophobicity of glassine paper. Five strains of enoki mushroom, oyster mushroom, shiitake mushroom, oyster mushroom and versicolor are used as starting strains. Through solid fermentation mycelium culture, liquid fermentation mycelium culture, deep expansion fermentation culture of liquid fermentation mycelium, extraction and purification of liquid fermentation mycelium, and paper preparation and forming steps, fungal glassine paper is prepared using mycelium of deep fermentation of different strains as raw materials. The glassine paper prepared by the present invention not only has high transparency and good hydrophobicity, but also adopts a simple preparation process and a short cycle, can achieve large-scale factory production, and can be used as food packaging paper.

The invention relates to high-transparency and high-hydrophobicity fungus glassine paper based on liquid fermentation and a preparation method thereof, and belongs to the field of biological materials. The invention mainly solves the problems of low transparency and poor hydrophobicity of glassine paper. Five strains of flammulina velutipes, oyster mushrooms, shiitake mushrooms, hypsizygus marmoreus and coriolus versicolor are used as starting strains, and the method comprises the steps of solid fermentation hypha culture, liquid fermentation hypha culture, deep expansion fermentation culture of liquid fermentation hypha, extraction and purification of liquid fermentation hypha and paper preparation and forming. The glassine paper prepared by the method is high in transparency and good in hydrophobicity, the adopted preparation process is simple, the period is short, large-scale factory production can be realized, and the glassine paper can be applied as food packaging paper.

The utility model relates to the technical field of overpressure machines, in particular to an overpressure machine for glassine paper processing, which comprises a machine body, a humidifying mechanism is mounted on the machine body and comprises two supports and mounting blocks, the two supports are symmetrically and fixedly connected onto the machine body, the mounting blocks are fixedly connected onto the supports, and the mounting blocks are fixedly connected onto the machine body. A clamping rod and rotating shafts are rotationally connected into the mounting block, a holding rod is fixedly mounted on the clamping rod, a steam humidifier is fixedly mounted between the two rotating shafts, inserting grooves are formed in the support and the rotating shafts, inserting blocks are mounted at the inserting grooves in a clamped mode, and sliding mechanisms are fixed to the inserting blocks. A limiting mechanism is mounted on the machine body in a clamping manner; the sliding mechanism drives the inserting block to slide out of the support and the rotating shaft, the clamping rod can rotate in the mounting block through the holding rod, then the spraying angle can be adjusted when the rotating shaft drives the steam humidifier to rotate, and therefore the humidity of the surface of paper is adjusted.

The invention provides a production method of a novel environment-friendly micro-carved pattern glass paperboard, which comprises the following steps: selecting a film as a base material, printing a red cursor on the film, and coating UV gloss oil; selecting an ivory board as backing paper, utilizing UV gloss oil as an adhesive, and compounding the transfer film with the ivory board, so that the red cursor is transferred to the ivory board; fine lines are engraved on the surface of the roller base material through the laser engraving technology, the surface of the roller is subjected to chromium plating treatment after engraving is completed, and the micro-engraved grain gravure roller is manufactured; feeding the compounded paper into embossing equipment, and carrying out embossing treatment by utilizing a micro-carving pattern gravure cylinder, so that micro-carving patterns are transferred to the surface of the paper; the embossed paper is fed into a UV curing device, the curing power is adjusted to cure the UV coating layer, the film on the surface of the paper is stripped after curing is completed, and the glass paperboard with the miniature carving pattern is obtained.

The invention relates to a method, system and a product thereof, wherein glassine or supercalendered kraft (SCK) paper, which has been used as a release liner substrate, is recycled into a high-quality pulp. When highly specific raw material is used for recycling, the characteristics of the recycled pulp may be adjusted already upon recycling. The method and the system is configured to adjust the fibrillation of the pulp such that the recycled pulp can be used without further refining for manufacturing new glassine or SCK paper. The compatibility of the recycled pulp may further be optimized for glassine or SCK paper production, respectively. Advantageously, the recyclable material is sorted based on the paper colour, prior to recycling. A recycled pulp may be provided which does not need to be bleached during the pulp recycling, prior to introducing it into a new glassine or SCK paper production.

The utility model discloses a glassine tail pulp recycling device which comprises a tank body, and a conical separation tank, a pulp stabilizing platform and a good pulp tank are arranged in the tank body; the side part of the conical separation tank is provided with a tail slurry inlet, and the bottom is provided with a slurry residue discharge port; the top of the conical separation tank is in overflow connection with a slurry stabilizing table, the slurry stabilizing table is connected with an accepted slurry tank, the side part of the accepted slurry tank is provided with an accepted slurry outlet, and the bottom of the accepted slurry tank is provided with a cleaning drain outlet. According to an existing three-section desander of the glassine paper machine, slag pulp is directly discharged and lost, a tail pulp discharging pipe of the third-section desander is connected with a tail pulp recycling device, and heavy impurities are further separated through a conical separating groove. And the light accepted pulp, the high-quality filler and the like return to a pulp inlet of the second-section sand remover through a pulp stabilizing table, an accepted pulp tank, an accepted pulp outlet and the like to be further recycled. By utilizing the device which is simple and easy to manufacture, the tail pulp discharge amount of the glassine paper is greatly reduced, the total retention of pulp and filler is improved, the water consumption is obviously reduced, the manufacturing cost of the glassine paper is reduced, and meanwhile, the wastewater discharge is reduced.

Provided is a workpiece processing sheet comprising: a release sheet having a release agent layer on one surface side of glassine paper; and a work attachment layer laminated on a surface of the release agent layer on the opposite side to the glassine paper. The workpiece processing sheet can greatly contribute to reducing carbon dioxide emissions and decreasing the use of plastic materials.

The invention relates to the technical field of medical glassine paper coating production equipment, in particular to medical glassine paper coating production equipment which comprises a coating machine box, the upper end of the coating machine box is connected with a liquid storage box, the upper end of the liquid storage box is connected with a liquid inlet pipe, one side of the coating machine box is provided with a cleaning assembly, and the other side of the coating machine box is provided with a liquid outlet pipe. The cleaning assembly comprises a cleaning box, a long plate is fixedly installed at the position, close to the center, of the upper end of the cleaning box, fan boxes are arranged on the two sides of the long plate, a rectangular through groove is formed in one side of the cleaning box, a scraper is arranged in the rectangular through groove, and an electric push rod is fixedly connected to the upper end of the scraper. A threaded sliding block is fixedly mounted at the top of the electric push rod; according to the coating production equipment for the medical glassine paper, the medical glassine paper can be conveniently cleaned.

To provide an adhesive tape that is completely free from problems of abrasion and peeling of a printing layer, limitation on ink to be used for the printing layer, and the problem of detachment of the printing layer, and that uses a paper substrate gentle to the environment.SOLUTION: An adhesive tape comprises a first substrate, a second substrate, an adhesive layer and a printing layer. The printing layer is disposed between the first substrate and the second substrate. The adhesive layer is disposed on a side where the printing layer of the first substrate is not present. The first substrate and the second substrate are composed of a glassine paper, or the first substrate is composed of a transparent plastic, and the second substrate is composed of a glassine paper. The adhesive tape is advantageously used for binding of vegetables or fresh flowers, sealing of container packaging or a packaging bag for food, or identifiable display of commodities.SELECTED DRAWING: Figure 3

This utility model relates to the field of new materials technology for clothing, specifically a three-layer double-sided adhesive, comprising a high-temperature TPU, a low-temperature TPU, and a glassine paper. A layer of low-temperature TPU is disposed on both the top and bottom of the high-temperature TPU, with the bottom layer of low-temperature TPU attached to the glassine paper. The thickness of the high-temperature TPU is 0.03mm–0.05mm, the thickness of the low-temperature TPU is 0.02mm–0.04mm, and the thickness of the glassine paper is 0.07mm–0.09mm. This utility model, through the combination of high and low-temperature TPU, allows for quick bonding to sportswear. It provides a certain level of support strength while facilitating bonding. Furthermore, the material is soft, resistant to washing at certain temperatures, and has a high softening temperature, making it particularly suitable for use in high-intensity sportswear.

The utility model relates to the technical field of foam die-cutting processing, in particular to a circular cutter die-cutting device for composite silica gel foam, which comprises a vertical frame, a plurality of roller components distributed in multiple layers are arranged on one side of the vertical frame in the longitudinal direction, and a driving and transmission device is arranged on the other side of the vertical frame. A feeding traction roller set, a first composite roller set, a first die cutting roller set, a first waste discharging roller set, a second composite roller set, a second die cutting roller set and a discharging traction roller set are sequentially arranged in the middle of the vertical rack at the same horizontal height in the material conveying direction. A discharging roller assembly is arranged on the upper portion of the vertical rack and comprises a foam discharging roller, a double-faced adhesive tape discharging roller, a glassine paper discharging roller, an OPP adhesive tape discharging roller and a gummed paper discharging roller, and a finished product discharging box is arranged at the discharging end of the discharging traction roller set. The circular cutter die cutting device can effectively solve the technical problems that foam is prone to collapse, the production efficiency and the product percent of pass are low, and manual waste discharge is needed in the existing silica gel foam die cutting process.

The invention relates to the technical field of glassine paper production, in particular to glassine paper production equipment and a production method thereof.The glassine paper production equipment comprises a fixing frame, and a first guide roller, two second guide rollers and two third guide rollers are rotationally installed on the fixing frame. Through matching of the collecting box and the scraping assembly, redundant silicone oil or impurities on the guide roller and the oiling assembly can be cleaned in time, the situation that residual materials affect the product quality is avoided, the redundant silicone oil can be recycled through the collecting box, and raw material waste is reduced; the feeding mechanism can stably and continuously supplement silicone oil for the silicone oil box of the oiling assembly, production interruption caused by supply interruption of the silicone oil is completely eradicated, and production continuity is guaranteed. The drying mechanism can quickly dry backing paper coated with silicone oil, the production period is shortened, and the production efficiency is improved; the air adjusting assembly can flexibly adjust the air outlet direction of the drying mechanism, it is guaranteed that hot air evenly acts on the backing paper, insufficient or excessive local drying is avoided, and the drying quality of the glassine paper is further guaranteed.

The utility model provides an S-type and R-type glassine collagen synthesis promoting device, which belongs to the technical field of glassine synthesis and comprises a synthesis barrel, a top cover fixedly mounted at the top of the synthesis barrel, a feeding hole formed in the surface of the top cover, and a water tank mounted above the synthesis barrel in a matched manner, and the discharge valve is communicated with the lower part of the synthesis barrel. The anti-blocking assembly is matched with all parts in the cleaning assembly, the first crushing plate and the second crushing plate can be driven to rotate oppositely through a single driving source, the sweeping disc can be driven to sweep away materials attached to the inner wall of the synthesis barrel, the materials are further sheared and crushed, it is ensured that the materials reach ideal fineness, and the crushing efficiency is improved. And when large materials are prevented from being accumulated at the discharge valve, the materials attached to the inner wall of the synthesis barrel are removed, so that the crushing efficiency is improved, and the effect that the materials are finer and more uniform is ensured.

The invention relates to the technical field of glassine paper, in particular to multi-layer composite structure high-strength glassine paper and production equipment thereof, the equipment comprises a support frame, and further comprises an adjusting mechanism mounted in the support frame; the jacking mechanism is installed in the supporting frame, and the pushing force on the glassine paper is adjusted along with the adjusting mechanism; the adjusting mechanism comprises a driving assembly, a limiting assembly, a coating assembly, an adjusting assembly, a rotating assembly and a coating bin. The coating bin is installed in the supporting frame, and the driving assembly is installed in the supporting frame and used for adjusting the limiting assembly and the adjusting assembly. When the L-shaped frame moves, the linkage rod drives the conical plate to move in the coating bin, and when the specification of glassine paper is smaller, the moving amplitude of the conical plate towards the center of the coating bin is larger, so that the discharging range of the coating bin is adjusted, the discharging range is adjusted according to the specification of the glassine paper, and coating bins of different models do not need to be replaced any more.

The invention discloses a special hole plugging adhesive tape for a new material, which comprises backing paper, the backing paper is made of thick glassine release paper, the outer surface of the backing paper is provided with a fluorine release agent, the upper surface of the backing paper is sequentially provided with a bottom layer, a middle layer and a surface layer from top to bottom, the upper surface of the backing paper is attached to the lower surface of the bottom layer, and the surface layer is provided with a surface layer. The lower surface of the middle layer is attached to the upper surface of the bottom layer, and the upper surface of the middle layer is attached to the lower surface of the surface layer. The middle layer comprises the sealing layer made of silicon rubber, the silicon rubber has good sealing performance, leakage of media such as gas and liquid can be effectively blocked, the reliable hole blocking effect is ensured, meanwhile, the silicon rubber sponge buffer layer is matched, external pressure can be absorbed or tiny unevenness of the surface of the base material can be adapted, attaching gaps are reduced, and the service life of the base material is prolonged. The attaching stability of the adhesive tape and the base material to be subjected to hole plugging is improved, and the sealing failure caused by the irregular surface of the base material is avoided.

The invention relates to a method for producing glass paper having a basis weight of less than 50 g / m2, in which an optimal combination of BSKP, BHKP and BCTMP is used to adjust the properties of the fiber ingredients. In glass paper with very low basis weight, the formation of the paper web during paper manufacturing can be controlled by optimization of fiber ingredients, which can be used to produce very thin glass paper without reducing thickness and without adversely affecting other paper properties, which will prevent the glass paper from being used as a substrate layer in release interleaving paper. Therefore, glass paper with an appropriate proportion of BCTMP in the fiber composition can be produced, and the glass paper has the quality characteristics of paper which is sufficient to be used as a base material layer of industrial release lining paper.

The utility model provides an S-type and R-type glassine promotion collagen detection device, which belongs to the technical field of biomedicine and comprises a bearing mechanism, an isolation box, a driving component fixedly mounted in an inner cavity of the isolation box and an optical detection part fixedly mounted at the top of the driving component. The detection table is fixedly mounted at the top of the optical detection piece; the flushing mechanism comprises a cleaning box fixedly installed in an inner cavity of the isolation box. The flushing mechanism can effectively clean appliances such as a micropipettor after detection, the flushing assembly enables cleaning liquid to flow, the flushing assembly is matched with the cleaning assembly to brush the surfaces of components, sample residues and cross contamination are prevented, cleanliness of the device and reliability of follow-up detection are guaranteed, and the detection efficiency is improved. Therefore, components of a sample possibly remained on the surface of the appliance can be more effectively removed, the risk of cross contamination of the sample caused by incomplete cleaning of the appliance is reduced, and the accuracy of a detection result is improved.

The utility model discloses a glassine paper humidity adjusting device which comprises a processing box with an inlet and an outlet in two sides and a bottom end discharge hole, a supporting plate is fixedly connected to the inner wall of the bottom end of the processing box, a driving motor is fixedly connected to the middle of the upper end of the processing box, and a first gear is fixedly connected to the middle of the output end of the driving motor. The output end of the driving motor is fixedly connected with a first transmission wheel. Through the arrangement of the rotating pipe, the connecting pipe and the spray head, rapid rotating spraying under the mutual transmission action of the driving motor, the first gear and the second gear is facilitated, and the wetting spraying uniformity of glassine paper is improved; and meanwhile, a belt and a transmission wheel are matched with the transmission effect of a bevel gear to continuously drive a thread sleeve to move on the rod wall of a reciprocating lead screw, so that excessive moisture of paper is cleaned, humidity adjustment is facilitated, meanwhile, internal air flow is increased through internal rotating fan blades, and humidity adjustment is facilitated.

The invention relates to the technical field of labels, and discloses a degradable self-adhesive label and a preparation method thereof.The degradable self-adhesive label comprises a label surface layer, an adhesive layer and bottom paper, and the label surface layer is prepared from, by weight, 50-70 parts of PHA, 5-20 parts of bamboo fibers, 5-10 parts of plasticizer, 0.5-1.5 parts of nucleating agent and 2-5 parts of lubricant; the adhesive layer comprises the following raw materials in parts by weight: 20-50 parts of PHA, 30-60 parts of modified starch, 80-100 parts of water, 1-15 parts of an alkaline substance, 1-6 parts of a cross-linking agent and 0.5-2 parts of an antioxidant; and the bottom paper is glassine paper coated with polysiloxane. The modified starch is prepared, so that the water resistance and the viscosity stability of the label can be remarkably improved, and the material has excellent degradability and is environment-friendly.

The invention relates to the technical field of medical and refrigeration label manufacturing, and provides a cold-resistant medical label and a preparation method thereof, and the cold-resistant medical label comprises the following structures which are stacked in sequence: a base material layer which is composed of a low-temperature-resistant polymer film and is selected from a PP film, a PET film or a PG film; the adhesive layer is formed by a modified acrylic acid hot melt adhesive, the modified acrylic acid hot melt adhesive contains a hydrogenated castor oil modifier, and the viscosity range of the modified acrylic acid hot melt adhesive is 5000-12000 cP; and the release layer is formed by high-density glassine release backing paper. The low-temperature-resistant polymer base material layer, the specific modified acrylic acid hot melt adhesive layer and the high-density glassine release paper which are reasonably designed are combined, so that the technical problems that the medical label is prone to viscosity loss, embrittlement and information loss in an ultralow-temperature cold-chain environment are successfully solved.

The utility model provides high-smoothness glassine release paper winding equipment which comprises a supporting frame, supporting seats, a driving structure, a winding structure and a tightening structure, the supporting seats are fixedly installed at the two ends of the upper portion of the supporting frame, and the driving structure is rotatably installed in the supporting seats; the two ends of the winding structure are fixedly mounted at the inner ends of the two groups of driving structures; the tightening structures are fixedly installed at the two ends of the lower portion of the supporting frame. The surface of the tightening structure is wound by release paper and is wound on the winding structure; due to the arrangement of the winding structure and the tightening structure, wrinkles cannot occur during winding, tight winding can be performed, and a wound paper roll is convenient to place.

This invention relates to the field of papermaking technology, specifically to a glassine paper and its production process. This application aims to solve the problem of how to improve the oil resistance of glassine paper. To this end, the production process of the glassine paper in this application removes gum-like substances from the wood fibers by alkali treatment followed by cooking with the addition of polyether, palm wax, and pentaerythritol stearate. The resulting wood fiber pulp, chitosan, cellulose, bamboo fiber pulp, mica, and silica are then modified with dopamine, further improving the oil resistance of the glassine paper. Furthermore, the glassine paper obtained using the method of this application not only has high density, smoothness, and gloss, but also high strength and good oil resistance, exhibiting excellent performance characteristics.

The invention relates to a method for preparing cross-linkable composition that can be used at a paper machine for coating a paper, such as glassine, SCK or a high-density paper suitable for packaging of a food product or another oxygen-sensitive product, wherein glyoxal is grafted into the structure of polyvinyl alcohol in an aqueous acetalization reaction prior to coating the reaction product on a paper, whereby modified PVA which comprises a controlled amount of glyoxal-based branching points ending into aldehyde groups is obtained and the amount of free glyoxal in the reaction product and on a primer layer of a paper substrate may be significantly reduced.

The utility model provides a positioning device for processing high-strength glassine release paper, which comprises an unwinding rack, an expansion winding drum is rotatably mounted on the unwinding rack, an expansion servo motor is mounted on the expansion winding drum, one side plate of a guide monitoring rack is fixedly mounted on one side of the expansion winding drum and the unwinding rack, and the other side plate of the guide monitoring rack is fixedly mounted on the other side plate of the guide monitoring rack. Positioning anti-fluctuation devices are installed on two side plates of the guide monitoring rack, the number of traction spray pipes of the positioning anti-fluctuation devices is two, the two traction spray pipes are rotatably installed on the two side plates in parallel, and each traction spray pipe is provided with a plurality of high-pressure spray heads; the servo motor accurately drives the traction spray pipe to rotate, high-pressure air flow is accurately sprayed to the edge of paper in cooperation with the high-pressure spray head, the design effectively resists external interference such as wind power and mechanical vibration, high stability and accuracy of the paper in high-speed processing are guaranteed, accurate control of the servo motor enables the traction spray pipe to rotate flexibly, and the paper cutting efficiency is improved. The air injection pressure and direction are intelligently adjusted, and dynamic stable control is achieved.

The invention relates to a wrapping material (1) for wrapping an article (10), which is based on glassine paper with a grammage in the range of 25 to 50 g / m2, wherein the wrapping material (1) is present in the form of a web. The web has i. a first side face (S1), ii. a second side face (S2) situated opposite the first side face (S1), iii. at least one web portion (B) having a first and a second outer region portion (2, 3) and inner region portions (4, 5, 6, 7, 8), wherein the inner region portions are arranged between the outer region portions (2, 3). A heat-sealable coating is applied to the glassine paper on at least one of the two side faces (S1, S2) in at least one first outer coating region (2a-2g) in the first outer region portion (2) of the web portion (B). A heat-sealable coating is applied to the glassine paper on at least one of the two side faces (S1, S2) in at least one second outer coating region (3a-3g) in the second outer region portion (3) of the web portion (B).