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Preparation method of pulling-extruded polyurethane fiber reinforced composite material

A reinforced composite material and polyurethane fiber technology, which is applied in the field of preparation of pultruded polyurethane fiber reinforced composite materials, can solve the problems of slow solidification speed, mold blockage, fast solidification speed, etc., to improve the pultrusion speed, avoid poor fluidity, The effect of convenient start-stop control

Inactive Publication Date: 2018-12-07
SUZHOU HENG CHUAN PHOTOVOLTAIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) In the above process, when GF, composite felt and surface felt are immersed in the pouring box, the difference from unsaturated polyester is that the solidification speed of unsaturated polyester is slow, while the solidification speed of polyurethane is fast, which will As a result, the polyurethane has not had time to completely soak the GF, composite felt and surface felt, and the polyurethane has solidified, so when the GF with polyurethane is input into the mold, the GF will block the mold
[0007] (2) The preforming device described in the above process gradually turns GF into a profile with the same shape as the die, and at the same time extrudes excess PUR. Obviously, because polyurethane cannot completely penetrate GF, resulting in residues on the surface and inside of GF With the excess polyurethane, these excess PUR is squeezed out, which also shows that there is a waste of polyurethane in the above process
[0008] (3) The pull-out speed of the above-mentioned cured PUR / GF composite material is slow, resulting in low production efficiency
[0009] (4) In the material prepared by the above method, the mass fraction of GF is up to 70.5%. However, if this method continues to increase the content of glass fiber, obviously the result is that the mold will be blocked

Method used

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  • Preparation method of pulling-extruded polyurethane fiber reinforced composite material

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Experimental program
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Effect test

Embodiment 1

[0019] The preparation method of the pultruded polyurethane fiber reinforced composite material of the present invention comprises the following steps:

[0020] Step 1, passing the fiber mat around the continuous fiber and the head of the continuous fiber with a mass fraction of 50% sequentially through the track guide and the mold, the continuous fiber includes glass fiber, aramid fiber, basalt fiber, carbon fiber, Metal fibers and any mixture thereof, the fiber mats are glass fiber mats, aramid fiber mats, basalt fiber mats, carbon fiber mats, metal fiber mats, etc. The track guide is located upstream of the mould, and the track guide is provided with at least one first through hole for the continuous fiber to pass through, and the track guide is also provided with at least one second through hole for the fiber mat to pass through, These second through holes are located around the first through holes, wherein the continuous fiber passes through the first through holes and th...

Embodiment 2

[0028] The differences between this embodiment and Embodiment 1 are as follows:

[0029] In step 1, the fiber mat positioned around the continuous fiber and the head of the continuous fiber with a mass fraction of 60% pass through the track yarn guide and the mold successively;

[0030] In step 2, the pressure of the polyurethane resin injected into the glue soaking zone of the mold is 0.15MPa, and the polyurethane resin is injected into the glue soaking zone at a speed of 563ml / min.

[0031] In step 3, the heating temperature in the preheating zone is 100°C, and the heating temperature in the gelling zone is 180°C.

[0032] In step 4, the pulling speed of the pulling device is 1500cm / min.

Embodiment 3

[0034] The differences between this embodiment and Embodiment 1 are as follows:

[0035] In step 1, the fiber mat located around the continuous fiber and the head of the continuous fiber with a mass fraction of 70% are sequentially passed through the track guide and the mold.

[0036] In step 2, the pressure of the polyurethane resin injected into the glue soaking zone of the mold is 0.17MPa, and the polyurethane resin is injected into the glue soaking zone at a speed of 233ml / min.

[0037] In step 3, the heating temperature in the preheating zone is 90°C, and the heating temperature in the gelling zone is 175°C.

[0038] In step 4, the pulling speed of the pulling device is 1240 cm / min.

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Abstract

The invention discloses a preparation method of a pulling-extruded polyurethane fiber reinforced composite material. The preparation method comprises the following steps: passing heads of continuous fibers, the mass fractions of which are 50-85%, through a mold, wherein the mold is at least provided with a glue-injecting permeating area, a pre-forming area and a curing area; injecting immediatelysynthesized polyurethane fibers into the glue-injecting permeating area of the mold at a high pressure through a polyurethane fiber injecting system, wherein the continuous fibers in the glue-injecting permeating area are fully permeated by the high pressure polyurethane fibers; moving the heads of the continuous fibers under the traction action of a traction device, wherein the polyurethane fiberpermeated continuous fibers move to the pre-forming area to be heated and gelled under the traction action to obtain a pre-formed continuous fiber reinforced composite material; and then pulling thepre-formed continuous fiber reinforced composite material which is cured and formed in the curing area out of the mold under the continuous traction acting force generated by the traction device. According to the preparation method disclosed by the invention, the mold can be prevented from being blocked after the content of the continuous fibers is improved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of a pultruded polyurethane fiber reinforced composite material. Background technique [0002] At present, the glass fiber reinforced composite material on the market is mainly a composite material based on glass fiber and unsaturated polyester. As a kind of composite material, glass fiber reinforced composite material has been widely used in aerospace, railway, decorative construction, home furniture, building materials, sanitary and sanitation engineering and other related industries due to its unique performance advantages. [0003] Some existing glass fiber reinforced composite materials are made by pultrusion process, specifically: under the traction of the traction device, the glass fiber is completely impregnated with unsaturated polyester through the resin tank, and then preformed in the mold, and heated to make It is solidified and forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/52B29C70/54B29K75/00
CPCB29C70/523B29C70/525B29K2075/00
Inventor 时剑李顺
Owner SUZHOU HENG CHUAN PHOTOVOLTAIC TECH CO LTD
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