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Prepreg, laminate, and molded article

A prepreg and laminate technology, which is applied to laminates or integrated moldings of thermoplastic resins and reinforcing fibers, including the field of thermosetting resins, can solve problems such as insufficient heat resistance and chemical resistance, and achieve excellent performance. , Reduce the molding time and molding cost, the effect of shortening the time

Pending Publication Date: 2021-12-28
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, when mechanical properties under high-temperature and high-humidity environments and excellent resistance to chemicals are required as structural parts for aircraft, compared with fiber-reinforced composite materials formed of thermosetting resins and reinforcing fibers, there are Issues such as insufficient heat resistance and chemical resistance

Method used

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  • Prepreg, laminate, and molded article
  • Prepreg, laminate, and molded article
  • Prepreg, laminate, and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0100] Hereinafter, the present invention will be described in detail using examples. However, the scope of the present invention is not limited to these examples. In addition, the unit "part" of a composition ratio means a mass part unless otherwise noted. In addition, the measurement of various characteristics was performed in the environment of the temperature of 23 degreeC, and 50% of relative humidity unless otherwise noted.

[0101]

[0102] (1) Glass transition temperature and melting point of thermoplastic resin

[0103] The glass transition temperature and melting point of the thermoplastic resin are measured using a differential scanning calorimeter (DSC) based on JIS K7121 (2012).

[0104] (2) Tensile shear joint strength

[0105] The laminated body which is an embodiment of the present invention or its comparative product was cut into two pieces with a width of 250 mm and a length of 92.5 mm with the 0° direction as the longitudinal direction of the test piece...

Embodiment 2

[0167] As described in Table 1, prepregs [I], [II] and laminates of Example 2 were prepared in the same manner as in Example 1, except that polyetherimide was not added as a thermoplastic resin soluble in a thermosetting resin. , to evaluate tensile shear joint strength and fatigue joint strength.

[0168] In Example 1, by including polyetherimide as a thermoplastic resin soluble in thermosetting resin, relative to Example 2 without polyetherimide, the temperature at 23°C and after water absorption at 80°C can be improved. Tensile-shear joint strength and fatigue joint strength tend to be preferable.

Embodiment 3、4

[0170] As described in Table 1, in Example 3 and Example 4, reinforcing fibers having different strand tensile strengths were used.

[0171] Compared with Examples 1, 3, and 4, the higher the tensile strength of the wire harness, the higher the tensile shear joint strength and fatigue joint strength at 23° C. and after water absorption at 80° C., showing preferable characteristics.

[0172]

[0173] In Comparative Example 2, instead of preparing a prepreg based on the above-mentioned , a prepreg was prepared as follows: the reinforcing fiber sheets arranged planarly in one direction Both sides, attached film unit area weight 50g / m 2 A film of polyamide 6 ("Amilan" (registered trademark) CM1007 (manufactured by Toray Co., Ltd.)) was heated and pressed at 250°C to obtain a reinforced carbon fiber basis weight of 193 g / m 2 of prepregs. Cut the obtained prepreg into the specified size at [0° / 90°] 2s After lamination was formed, a pressure of 3 MPa was applied with a press mac...

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Abstract

The purpose of the present invention is to provide: a prepreg which has excellent tensile shear binding strength, fatigue binding strength, and interlayer fracture toughness value, which can be firmly integrated with other structural members when being melted and adhered thereto, and which is for manufacturing a laminate that is suitable as a structural material; and said laminate. This prepreg contains [A] reinforced fibers, [B] a thermosetting resin, and [C] a thermoplastic resin as components, and is characterized in that, [C] is present in the surface of the prepreg, [C] is a crystalline thermoplastic resin having a glass transition temperature not less than 100 DEG C or an amorphous thermoplastic resin having a glass transition temperature not less than 180 DEG C, and [A] the reinforced fibers included in both a resin region containing [B] and a resin region containing [C] are present across the boundary surface between the two resin regions.

Description

technical field [0001] The present invention relates to a prepreg in which reinforcing fibers are impregnated with thermosetting resin and thermoplastic resin, and a laminate or integrated molded product including thermosetting resin, thermoplastic resin and reinforcing fibers. Background technique [0002] For fiber-reinforced composite materials that use thermosetting resin or thermoplastic resin as a matrix and combine with reinforcing fibers such as carbon fiber and glass fiber, it is lightweight, and has mechanical properties such as strength and rigidity, heat resistance, and Because of its excellent corrosion resistance, it is used in many fields such as aerospace, automobiles, railway vehicles, ships, civil engineering, and sporting goods. However, these fiber-reinforced composite materials are not suitable for manufacturing parts and structures with complex shapes in a single molding process. In the above-mentioned applications, it is necessary to prepare parts made...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B11/16B29K105/10B29L9/00B32B5/28C08J5/04C08J5/24B29C70/20B29C70/30B29C70/68
CPCB29C70/003B29C70/0035B29K2105/0872C08J5/243C08J2363/02C08J2363/00B32B2260/046B32B2605/10B32B5/26B32B5/02B32B2260/023B32B2605/12B32B2605/18B32B2605/00B32B2307/718B32B2307/54B32B2262/106B32B2307/732B32B2307/558B29C70/30C08J5/249B29C70/06B29K2071/00B29K2079/085B29K2105/12C08J5/04
Inventor 三角润本间雅登筱原响子
Owner TORAY IND INC