SU726136A1 - Press-material - Google Patents

Description

(54) PRESS MATERIAL

This invention relates to the development of press fiber, made for the manufacture of high-strength, heat-resistant and wear-resistant products, capable of operating under conditions of poor lubrication, for example, for sliding sleeve bearings of cleaning drums of foundry shops. Composite materials of structural designation containing thermosetting binder and polymer fibers are known. A known fiber press for the manufacture of highly loaded products, including a filler based on cotton cellulose, popes and viscose, phenol-formaldehyde binder and targeted additives, iron oxide, hexametnlentetramine, plasticizer 3. However, the fibrous structure of the aliphatic polyamine fiber is capable of being destroyed by phenol-formaldehyde oligmers due to chemical interaction, as a result of which the properties of the fiber are used inefficiently, which leads to a decrease in the physicomechanical properties of the material. In addition, products from the specified fiber press have a lack of water resistance, heat resistance, and wear l-resistance, which limits its scope. The closest prototype of the known technical solutions is a press fiber of structural designation based on an epoxy binder curable by M-phenylenediamine and an aromatic polyamide hardened and h & However, products from the specified pre-fiber have insufficient wear resistance, a relatively high coefficient of friction, under conditions of poor lubrication, as well as insufficient resistance to dynamic loads, which limits its scope. The purpose of the invention is to improve the antifriction properties and resistance to dynamic loads of the press material. 3: 7261 This goal is achieved by using as a reinforcing filler for the EPOE Aligomer, cured with m-phenylenediamine, a mixture of chopped fibers from aromatic polyamide or s carbon fiber and fibers from alpha-free polyamide with a ratio in a mixture from 30:70 to 7O: 30, respectively , as well as the introduction of targeted additives in the form of graphite or 1P molybdenum disulfide in the following ratio i of components of the press material, wt.%: Epoxy diano oligo-. measures 35-42 M-h}) Dienediamine 4- 5 15 Mixed chopped hairs 45-55 Graphite or molybdenum disulfide 6- 8 Example 1. Prepare three types of jVaWeWOkeNit, different in the content of polyamide aliphatic and coal “ROYAL fibrous filler. Composite material is pressed at 150 ° C under a pressure of 250-35 kgf / cm at 25 times the holding time 2 min per 1 mm of the thickness of the product S1) In the table. 1 shows presofrovolnit recipe, in table. 2 - its properties. Table 1,

38,527,516,5 16,5 27,538,5

,

353535

444

",." .-,. / ..: ..: - ..:.,:,,., ".

666

38.5 27.5 16.5 16.5 27.5 38.5

35

35

35 6 Table2 Impact viscosity, kgf-cm / cm 42 Abrasion intensity, mg / cm km (Rud 12 kgf / cm, X.0.4 m / s without lubricant) O, 12 0.16 O, 3 Friction coefficient 0, 18 0.16 0.2 PRI mme R 2. Three types of pre-fiber are made, differing in the content of polyamide aliphatic and polyamide aromatic filler. Preso-composit material is pressed according to the mode described in the example. Recipe press-fiber are given in table. 3, its properties - in, table. 4. Table 3 Impact viscosity, kgf-cm / cm 68 Intensity of abrasion, mg / cm km (kgf / cm, 4M / s, without smáki) OD7 O, 19 O, 4 Coefficient friction 0, 22 0.19 0 , 25 Example. I make the type of composite materials with the content of polyamide filler, binder and target ki; Pre-fiber is pressed as described in example 1. The recipe of press fiber is given in tab. Its properties are in table. 6

Table3

35

42

four

x 55

45

8 6

Claims (1)

1. Copyright certificate CX: SR Kharkov, Kharkov University, 1972, No. 423817, cl. C 08 L 61 / 1O, 1972.t. 6, s. 84-85 (prototype).