SU775110A1 - Method of producing glass plastic material - Google Patents

Description

The invention relates to a method of manufacturing glass-reinforced plastics, namely, chemical resistant construction materials, products from which are used in chemical, automotive, construction, light, food industry, agriculture and everyday life.

A known method of manufacturing a stack-fooplastic, duplicated by a chemically resistant thermoplastic, is extruded. Duplicated thermoplastic and glass fiber compres-material (prepreg or premix) 1 are used. In this method of manufacturing laminate, a double layer is the reinforcing base of the transition layer, which provides adhesion during the transition from thermoplast to fiberglass.

The disadvantage of this method is the low adhesion strength of the double material with thermoplastic (from 5 to 25 kgf / cm at separation), which prevents it from being used as a monolithic construction material.

The purpose of the invention is to increase the adhesion between the layers in the finished plastic.

This goal is achieved by the fact that in a method of manufacturing glass-reinforced plastic clad with a chemically resistant thermoplastic, including assembling a package from a thermoplastic and thermosetting in the form of a fiberglass premix or prepreg of layers and its subsequent pressing, the package is made from a thermoplastic layer made with anchor ribs and between glass fiber premix or prepreg of a thermosetting layer is laid and pressing is carried out at a temperature below the melting point of the thermoplastic and wine ture disintegration of the peroxide curing system or premix glass fiber prepreg.

The proposed method consists in placing prepreg strips (premix) on the surface of a thermoplastic sheet (sleeve) between the anchor ribs and the bag is placed in a mold for the IV (another sheet with anchor ribs equal to 0.5). The upper extrusion temperature range must be below

t.lui.termoplast by 10-20 ° C. Pressing temperature depending on type of thermoplast type and composition. prepreg or premix is between 30 and 120 ° C & pressing pressure from 5 to 150 kgf / cm-. The pressing time is from 30 to 120 s per 1 km of thickness. The cooling time of sheet irto lipplasts at 20 5 C is 5-10 minutes per 1 mm of thickness.

The most optimal layer thickness in the polyplast; providing. . Its work as a chemical resistant construction,

of the following materials: a thermoplastic resistant layer (inner or outer) is 1.33 mm, a structural layer of fiberglass - 5-20 mm,

The physicomechanical properties of various types of plastic are different and are determined by 90-95% by the properties of the structural layer (fiberglass). The table below lists the strength properties for biplast and triplast.

Indicators

Biplast

1300 + 50 1650 + 50

600 + 30

70+ 5

80+ 5 OsHiMep 1 5p5 is a preparation of a molded biplast. On the heated metal plate of the press, 1 m of low-density polyethylene sheet is placed, 1.3 mm thick / with anchor ridge 1.3 yl thick, 3 m rib head diameter and 20 mm pitch. Along the ankekzhyh ribs, there is a mass of premix in the amount of $ 1 kg for the construction layer in L2 mm. The composition of the premskks, weight. %:. Polyester unsaturated with "ol35-42 Mineral filler25-35 Peroxide-type curing agent with redox initiator Targeted additives OstStealing Glass Produced pressing for 24 minutes at a temperature of 30 C and a pressure of 100 kgf / cm After finishing the preparation of a biplast sheet remove the fiberglass sheet and filter them onto the packaging.

Triplast

Noticeable

Biplast sheet. The thickness of the polypropylene is 2 times, the thickness of fiberglass is 15 mm. The load is applied from the side of the thermoplastic

920 + 20

Triplast sheet; total thickness

100 + 20 20

tolaoin polypropylene layers of 2 km, thickness

Claims (1)

80+ 5 16mm fiberglass Pry5yur72TSpostoyzgotov yen sheet biplast. On a heated metal plate of a press, il m of a polypropylene sheet 2 mm thick are placed with anchor ribs 2 mm thick, with a rib height of 10 mm, with a diameter of the rib head 4 and a step of 40 mm. Along the anchor "ribs lay strips of prepreg in the amount of 18 kg for a construction layer of 12 mm. Composition of prepreg, wt.%: Polyether unsaturated Mineral filler Hardener neiJeKHCHoro 0.5-1.0 Target 2-5 fiberglass additives Else, filler Compressed for 18 minutes at a temperature of 110 ° C and a pressure of 50 KGS / CM, At the end of pressing the hot biplast sheet is removed from the mold 1i placed for cooling between the metal sheets. After cooling for 1.5-2 hours, glass sheets of the formation are cut off from the edges of the sheet and the sheet is directed to the packaging. Example 3 A method for the production of plastic triplast. An extrusion bag is made in accordance with Example 2, then on top of the 1mgrill with anchoring ribs offset from the bottom sheet of 0.5 the distance between the ribs and the said extrusion process is carried out. Example 4, Method for producing a biplast tube. A polypropylene sleeve 2 mm thick with anchor ribs 2 thick, 10 mm high ribs, 4 mm rib heads are pulled on a metal mandrel with a diameter of 400 mm. The strips of prepreg are placed along f s6ep in the amount of 60 kg per 1 p, m. with a construction layer of 15 mm. The resulting blank is placed in a cylindrical shape consisting of two heated halves. The pressing process was carried out for 3 minutes at a pressure of 5 kgf / cm and a temperature of 120 ° C. Example 5, Method for producing a trip. The process of preparation of the workpiece is carried out on 4. Then, two halves of the sleeve with anchor ribs, shifted by 0.5 steps, are placed along the perimeter from the top. Conducting the process with: pressing in the mode described in the head; The resulting pipe is removed from the form is cooled. The seam is welded for welding and the two outer halves of the polypropylene sleeve are welded by means of extrusion welding. The use of the proposed method of manufacturing a polyplast and products made from them provides the following advantages compared to existing methods: the possibility of a high-performance and cost-effective method of producing sheet chemical-resistant structural materials, products from which can be operated in acidic, alkaline and neutral corrosive environments in the range of operating temperatures from 40 to 100 C; the possibility of developing and designing chemical equipment, tanks, baths, storages, gas ducts, and so on, of polyplastic; the possibility of replacing equipment made of stainless steel, titanium, lead and other scarce and expensive materials with carbon steel equipment lined with polyplastic, The cost of 1 kg of biplast based on low-density polyethylene or polypropylene is 2-2.5 rubles, and triplast - 1.8-2.3 rubles The economic effect of replacing stainless steel with a polystyrene on 1 m of the device’s surface will be approximately 80–90 rubles, with the same service life and 45–50 rubles for replacing brick linings - 95–50 rubles, in our country there are serial atinycK thermoplast sheets and 1 ukav with anchor ribs are made by Donetsk Promstroyniiproekt, and prepregs and npet-iHKCOB respectively Stupinsky fiberglass and fiberglass plastics and Kalininsky fiberglass plastics, respectively. The capacity of technological lines is about 1 thousand tons per year. Serial production of sheet biplast and triplast is scheduled to begin at the Stupino fiberglass plant in 1979-1980. characterized in that, in order to increase the adhesion of the iwiex y layers in the finished plastics, we discuss the package is made from a thermoplastic layer made with apertured ribs, between which is laid fiberglass premisk or thermoset prepreg layer and compressing osushestvl um at a temperature below the melting point and above the thermoplastic temperature decay perek2 "meat curing system premihsa or fiberglass prepreg. Sources of information taken into account in the examination 1. Sukhov S, I, Study of methods of obtaining and glass-reinforced plastics clad with thermoplastics. The use of fiberglass in the national economy, MDNTP them, F, E, Dzerzhinsky, collection, 2, 1968, p., 35,