SU956614A1 - Method for making phenol glass-filled plastics with metallized surface - Google Patents

Description

glass fiber filler binder, drying, preparing a metal mesh, laying a metal mesh onto the surface of uncured fiberglass, spraying metal onto the surface of uncured glass | plastic and cyclic hot pressing. In this way, a sufficiently high adhesion of the metal coating to the fiberglass is provided, the preparation of the surface of the fiberglass and the use of adhesive primers are excluded. A disadvantage of the known method is to increase the weight and cost of the fiberglass due to the introduction of a metal mesh into it. The purpose of the invention is to reduce labor capacity, weight and cost, saving metal. This goal is achieved by the fact that in the known method of manufacturing phenolic glass plastics with a metallized surface, including the impregnation of a glass fiber filler with a binder, drying, spraying the metal on the uncured surface of fiberglass and the subsequent cyclic hot pressing, drying is carried out until the content of 50-60 weight soluble. After the metal was sprayed, the press material was thermally treated to a soluble content of 2030% by weight and compacted by passing it between the metal rollers. Sputtering of a metal onto a press material containing 50-60 wt.% Soluble, on the one hand, provides partial adhesion of the metal to the surface of the press material, on the other hand prevents metal particles from being coated with a binder, which would occur if The content contained a large percentage of soluble. Further heat treatment of the metalized press material contributes to deepening the curing of the binder and increasing the adhesion of the metal coating to the press material, ensuring the safety of the coating as it passes between the rollers. Passing the metallized press material through polished metal rolls under pressure ensures compaction of the coating and a decrease in porosity. Maximum adhesion and final formation of the coating and fiberglass is carried out after the fiberglass is made in the usual conditions for the specified material. In the manufacture of single-layer fiberglass, one or two sides of the press material are metallized, and in the manufacture of two-layer multilayer fiberglass - one. The adhesion of the zinc coating to phenolic fiberglass when tested for shear is 57-73 kgf / cm and aluminum - 5078 kgf / cm. Maximum adhesion values were obtained on a press material containing 25-30% binder. As the binder content increases, the adhesion decreases. This is due to the fact that along with the adhesion of the metal to the polymer with a decrease in the content of the binder in the press material, there is a mechanical imprisonment of metal particles in the glass fabric structure. Therefore, when the metal layer is shifted relative to the fiberglass substrate, along with overcoming the intermolecular forces, the metal must be released from mechanical seizure in the structure of the fiberglass. The advantage of the proposed method also lies in the fact that the method allows to save a fine cellular metal mesh, to expand the range of the products obtained both in shape and in thickness. In addition, the method can be fully mechanized, since the stages of obtaining a press material, a metallized press material, its heat treatment and passage between the rollers are carried out in one production line. Example. The glass grid of the brand LA 12/12 by the method of dipping is filled / melted in an alcohol solution of phenolic lacquer LVS-1. The concentration of the solution is 40%. The content of binding in fiberglass is 25 wt.%. The impregnated glass mesh is transferred to a horizontal type of heat chamber consisting of three zones. When passing through the first heat zone, the maximum amount of volatiles is removed, and the press material is cured to 50% soluble. The temperature of the chamber is 100 ° C. After exiting the first zone, the material moves to the second, where an aluminum coating is sprayed onto its surface by pulverization. The coating is applied with the help of 5 metallizers of the mark ЭМ-12-7, located along the width of the material and offset from each other along the length by 400 mm. Each metallizer sprays a 200 mm strip. The operating pressure of compressed air is 6 kgf / cm. M, an etched press material with a coating thickness of 50 microns falls into the third zone, where it solidifies at a temperature of up to 30% soluble. After exiting the heat chamber, the metallized press material passes the inter-, ay with two pairs of polished rolls and is rolled into a roll. The roll pressure is 7 kgf / cm

A roll of metallized press material is installed on the tempering mechanism, on which another roll press material is located, on the basis of fiberglass fabric of the TR-0,7 brand. varnished LAN. A bag formed of two layers of press material with an outer metallized surface is placed between the press plates. Pressing temperature 160 ° C, pressure 10 kgf / cm3 pressing time 5 minutes.

After every minute the press is opened and the bag is moved 300 mm, after which the press is closed again. The result is a roll of metallized fiberglass, which is used for the manufacture of enclosing structures of agricultural buildings.

PRI mme R 2. A press material is made on the equipment and techniques described in Example 1 on the basis of T-13 glass fabric and a binder consisting of 3 parts by weight. polyvinyl butyral. The working concentration of the alcohol binder solution is 35%. The binder content in the press material is 42%.

A zinc coating with a thickness of 100 microns was sprayed onto the press material with a soluble content of 60%. Working pressure of compressed air b kgf / cm.

The metallized press material is heat treated to a soluble content of 20% by weight, after which it is passed through rolls.

A single-layer sheet of fiberglass extruded according to Example 1 (pressing time - 2.5 minutes) is used as a mold in the manufacture of glass cement slabs.

Example 3. Using equipment and methods, as per Example-1, making a press material based on SS-4 fiberglass mesh and an alcoholic solution of varnish based on rezol type phenol-formaldehyde resin. IF p).

The content of the binder in the pressmaterial is 57%, the content of solvent-x is 55 wt.%. A 75 micron thick zinc coating is sprayed onto the press material, the working pressure of compressed air is 6 kgf / cm-. After the metal is applied. The metallized press material is thermally treated to a soluble 25 wt.%, And then passed through metal rolls with a chrome-plated surface. . The bulk pressure on the material is 8 kg / s. After the press material passes through the rollers, where the metal coating has been compacted, the two press reels are mounted on the press release mechanism so that in both panels of the press material the surface with the metallized layer 5 faces the press plates. The material is passed through press plates and connected to an automatic stretch mechanism.

Pressing modes: 0 Pressing temperature, ° С165 Pressing pressure, kgf / cm 12 Specific pressing time 5,

min / mm thickness 5 Every 45 seconds the press is opened for 15 s, during which the bag is moved along the press plates to the area equal to 250 mm. The resulting material is coiled. Metallised phenolic fiberglass is used as a fence in the construction of livestock 5 rooms.

PRI me R 4. The TP-0.7 brand glass cloth was dipped in an alcoholic solution of a phenolic binder by dipping, consisting of the following Q components, parts by weight: Phenolic novol resin 100

Technical urotropin 12 Graphite Electrode 18 The impregnated glass fabric is transferred to a horizontal type of heat chamber consisting of 3 zones. When passing through the 1st zone, the press material containing 44 wt.% Binder cures to a soluble content of 60 wt.%. The temperature of the chamber is 125 ° C. After exiting the first zone, the press material enters the second. 5 RUN. A zone where a spray of zinc coating is sprayed onto its surface.

The coating was applied using 5 chalk tallis.tori brand EM-12-67, located across the width of the material offset from each other along the length of 400 mm. The operating pressure of compressed air during metallization is ø 9 kgf / cm, each metallizer sprays a metal strip of 200 mm. Coating thickness - 150 microns. Metallized press material falls into the 3rd zone, the temperature of which, as well as zones 1, 125C. After leaving the co0 zone

holding pacTBOpHNOJX in the press material is 20% by weight. The material then passes between the metal rolling rollers and is wound into. roll. The pressure of the rolls - 4 kgf / cm.

The roll of the material obtained is mounted on a tempering mechanism and is pulled towards a loading device located behind the plates of the press. The press material is pressed under a pressure of 20 kgf / cm at a temperature of 150 ° C with a pressing time of 5 minutes. Every 50 min. The press is opened and the panel is pulled for the next 250 mm / then smack again, creating pressure. The resulting single-layer metallized fiberglass is wound into a roll. The material is used to form coatings in agricultural buildings.

The table shows the adhesion strength of fiberglass on the proposed and known methods.

Coating:

Thus, the proposed method, in comparison with the known, allows to reduce the weight, cost and laboriousness of making phenolic fiberglass with a metallized surface while maintaining the adhesion strength of the metal coating to the fiberglass substrate by spraying the metal directly onto the press material, dried to contain 50-60 soluble wt.% subsequent heat treatment of the metallized material to a soluble content of 20-30 wt.%, compaction and pressing of the metallized press material.

Claims (4)

1. Hasuy A. Technique sprayed. Per. from Japanese M., engineering, 1975, p. 49. 2. The patent of France No. 1536404, cl. C, 23 C.3 / 00, published, 1968. 3. The patent of England No. 1187061, cl. C 7 F, pub. 1967. 4. USSR author's certificate 0 585071, cl. B 29-C 1/02, 1972 (prototype).