Glass fiber reinforced polyurethane material, support beam and preparation process of support beam

A technology of polyurethane material and supporting beam, which is applied in the direction of supporting the roof beam of mine roof, mining equipment, earth-moving drilling, etc. It is not easy to crack and reduces the production cost.

Active Publication Date: 2022-02-01
南京经略复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the content of continuous glass fiber is too high or too low, the flexural strength of the glass fiber reinforced polyurethane material will decrease, which will easily lead to partial cracking of the I-beam made of glass fiber reinforced polyurethane material

Method used

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  • Glass fiber reinforced polyurethane material, support beam and preparation process of support beam
  • Glass fiber reinforced polyurethane material, support beam and preparation process of support beam
  • Glass fiber reinforced polyurethane material, support beam and preparation process of support beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a support beam. The support beam in this embodiment is made of glass fiber reinforced polyurethane material. The glass fiber reinforced polyurethane material includes the following components by weight: 82kg of glass fiber yarn and its fabric, 20kg of polyol and isocyanate mixed polyurethane resin, 1kg of carbon-based nanomaterial, and 2kg of dispersant. Among them, carbon-based nanomaterials use TUBALL TM The aspect ratio of single-walled carbon nanotubes and carbon-based nanomaterials is 3125:1; glass fiber yarn and its fabrics include 70kg of glass fiber yarn and 12kg of glass fiber fabric, and BYK-163 is selected as the dispersant.

[0048] The supporting beam of the present embodiment is prepared according to the following steps:

[0049] Mixing stage: Add polyol and isocyanate mixed polyurethane resin, carbon-based nanomaterials and dispersant into the mixer, and stir evenly to obtain a two-component polyurethane resin mixture;

[0050] ...

Embodiment 2-10

[0055] As shown in Table 1, the difference between Examples 2-10 and Example 1 is that the proportioning of raw materials is different.

[0056] Table 1 Raw material weight percentage ratio table of embodiment 2-10

[0057]

[0058]

Embodiment 11

[0060] The difference between this embodiment and Embodiment 1 is that the glass fiber yarn and its fabric include 67 kg of glass fiber yarn and 13 kg of glass fiber fabric.

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Abstract

The invention discloses a glass fiber reinforced polyurethane material, a support beam and a preparation process of the support beam, and relates to the technical field of engineering support structures. The glass fiber reinforced polyurethane material is prepared from the following components in parts by weight: 70-85 parts of glass fiber yarn and fabric thereof, 15-25 parts of polyol and isocyanate mixed polyurethane resin, 0.2-3 parts of a carbon-based nano material and 1-3 parts of a dispersing agent; wherein the support beam is prepared according to the following steps: uniformly mixing polyol and isocyanate with polyurethane resin, a carbon-based nano material and a dispersing agent; infiltrating the bi-component polyurethane resin mixture into the glass fiber yarn and the fabric thereof to obtain a preform; curing the prefabricated body at 90-180 DEG C to obtain a glass fiber reinforced polyurethane material; and cutting the glass fiber reinforced polyurethane material into the support beam. According to the invention, the bending strength of the glass fiber reinforced polyurethane material can be enhanced, so that the local cracking of the I beam made of the glass fiber reinforced polyurethane material can be reduced.

Description

technical field [0001] The invention relates to the technical field of engineering support structures, in particular to a glass fiber reinforced polyurethane material, a support beam and a preparation process for the support beam. Background technique [0002] When excavating a mine tunnel, it is necessary to support the top of the tunnel. Generally, No. 11 I-beams for mining are used to support the top of the tunnel. The actual use length is 5 meters / piece, the standard weight per meter of No. 11 I-beam for mining is ≥ 26 kg, and the weight of each No. 11 I-beam for mining with a length of 5 meters reaches 130 kg. Due to the heavy weight of the No. 11 I-beam for mining, when transporting the No. 11 I-beam for mining from the ground to the mine tunnel excavation construction site, the labor intensity of the construction personnel is relatively high, which is not conducive to improving construction efficiency and safety. [0003] In order to reduce the labor intensity of con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K7/14C08K3/04C08J5/04B29C70/52B29C70/54E21D17/00
CPCC08J5/043B29C70/521B29C70/525B29C70/545E21D17/006C08J2375/04C08K7/14C08K2201/011C08K3/042C08K3/041C08K2201/001
Inventor 王小平陈立钱易强肖苏伟
Owner 南京经略复合材料有限公司
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