Reinforcing fiber bundle base material, production method therefor, fiber reinforced thermoplastic resin material using same, and production method therefor

A thermoplastic resin and reinforcing fiber technology, applied in the direction of carbon fiber, fiber processing, non-woven fabrics, etc., can solve the problems of reduced FRTP mechanical properties of thermoplastic resins, high melt viscosity, difficulty in melting impregnation of reinforcing fibers and low porosity, etc. Achieve the effect of excellent unwinding and high width accuracy

Active Publication Date: 2020-08-21
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in general, thermoplastic resins have higher molecular weight and higher melt viscosity than thermosetting resins, making it difficult to melt impregnate reinforcing fibers and reduce porosity
Therefore, low-porosity FRTP obtained by impregnating reinforcing fibers with a high-molecular-weight and high-viscosity thermoplastic resin has low productivity and high production costs.
On the other hand, the mechanical properties of FRTP using low-molecular-weight and low-viscosity thermoplastic resins that are easy to impregnate are greatly reduced, and the use of FRTP is limited.

Method used

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  • Reinforcing fiber bundle base material, production method therefor, fiber reinforced thermoplastic resin material using same, and production method therefor
  • Reinforcing fiber bundle base material, production method therefor, fiber reinforced thermoplastic resin material using same, and production method therefor
  • Reinforcing fiber bundle base material, production method therefor, fiber reinforced thermoplastic resin material using same, and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0221] The fiber bundle [A-1] was unwound at a constant speed of 10 m / min using a winder, passed through a vibrating widening roller vibrating in the axial direction at 10 Hz, and subjected to widening treatment, and then passed through a width regulating roller with a width of 50 mm. A widened fiber bundle with a width of up to 50 mm is obtained.

[0222] The obtained widened fiber bundle was unwound at a constant speed of 5 m / min, and was continuously immersed in a sizing treatment liquid obtained by diluting the sizing agent [S-1] with purified water, and the primary sizing agent was applied to The widened fiber bundle, and then, the widened fiber bundle coated with the primary sizing agent was supplied to a hot roll at 150° C. and a drying oven (under air atmosphere) at 200° C., and dried to remove water. Based on the above-mentioned measuring method of the adhesion amount of the sizing agent or the water-soluble polyamide, the obtained widened fiber bundle after the prima...

Embodiment 2

[0228] Except having set the coating resin [P-1] adhesion amount to 0.5 wt%, it operated similarly to Example 1, manufactured, and evaluated. A 1,500-meter reinforcing fiber bundle base material was produced. As a result, no yarn breakage or winding occurred at all, and the reinforcing fiber bundle base material could be produced with a stable width, and the process passability was good. The number of fibers per unit width of the obtained reinforcing fiber bundle base material was 1,111 fibers / mm, and the drape value D1 was 153 mm.

[0229] Next, the obtained reinforcing fiber bundle base material was continuously inserted into the fiber placement head, and the reinforcing fiber bundle was paralleled in one direction on a stand to produce a reinforcing fiber base material in a square shape of 250 mm × 250 mm, and then unpacked. There is no problem with comfort, and no yarn breakage or winding occurs, and the reinforcing fiber base material can be produced with a stable width a...

Embodiment 3

[0232] Evaluation was performed in the same manner as in Example 1 except that the coating resin [P-1] adhesion amount was 1 wt%. As a result, when a reinforcing fiber bundle base material of 1,500 m was produced, yarn breakage and winding did not occur at all, and a reinforcing fiber bundle base material was obtained with a stable width, and the process passability was good. The number of fibers per unit width of the obtained reinforcing fiber bundle base material was 1,020 fibers / mm, and the drape value D1 was 171 mm.

[0233] Next, the obtained reinforcing fiber bundle base material was continuously inserted into the fiber placement head, and the reinforcing fiber bundle was paralleled in one direction on a stand to produce a reinforcing fiber base material in a square shape of 250 mm × 250 mm, and then unpacked. There is no problem with comfort, and no yarn breakage or winding occurs, and the reinforcing fiber base material can be produced with a stable width and distance ...

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Abstract

Provided is a reinforcing fiber bundle base material characterized in that a sizing agent comprising at least a polyamide resin is adhered to the surfaces of the reinforcing fibers, the number of fibers per unit width included in a reinforcing fiber bundle is at least 600 threads/mm and less than 1,600 threads/mm, and the drape value of the reinforcing fiber bundle is 120-240 mm. Also provided area production method therefor, a fiber reinforced thermoplastic resin material using the same, and a production method therefor. The reinforcing fiber bundle base material can be applied in a plurality of molding processes involving fiber placement and a fiber reinforced thermoplastic resin molding material, etc., and has excellent shape stability and impregnating properties.

Description

technical field [0001] The present invention relates to a reinforcing fiber bundle base material having excellent handleability, less fuzz, morphological stability, and further excellent impregnation properties, and a method for producing the same. Background technique [0002] Fiber-reinforced resin (FRP) obtained by impregnating matrix resin with reinforcing fibers satisfies required properties such as excellent mechanical properties and light weight, and is therefore mainly used in aviation, spaceflight, and sports. As a typical production method thereof, an autoclave molding method is known. In this molding method, a prepreg in which a matrix resin is impregnated in advance with a reinforcing fiber bundle group is laminated on a molding die, and heated and pressurized in an autoclave to mold FRP. When using a prepreg, there is an advantage that extremely reliable FRP can be obtained, but there is a problem of high cost in manufacturing. [0003] On the other hand, as a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B15/12C08J5/06D06M15/55D06M15/59B29K105/08
CPCD06M15/59D06M15/55C08J5/06B29B15/125D04H3/002D04H3/12D03D1/00D02J1/18C08J5/042D06M2101/40D04H3/115B26D3/16B29B9/06C08J5/08C08J5/243C08J5/248C08J2377/00C08J2477/00B29B9/14B29B7/42B29B7/905B29B7/007D03D15/267D03D15/275D10B2505/02B29B15/10B29C70/06D04H1/00B29K2105/0872B29K2077/00Y10T442/2402C03C25/00
Inventor 布施充贵馆山胜平野宏清家聪松井明彦浦和麻
Owner TORAY IND INC
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