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Long fiber-reinforced propylene-based resin composition and long fiber-reinforced molded body

A propylene-based resin and long-fiber technology, which is applied in the field of long-fiber-reinforced propylene-based resin compositions and long-fiber-reinforced molded bodies, can solve problems such as poor appearance, and achieve excellent mechanical properties, excellent appearance, and the effect of suppressing white fog.

Pending Publication Date: 2021-06-01
PRIME POLYMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the case of molding a fiber-reinforced propylene-based resin composition using reinforcing fibers such as glass fibers, unevenness due to floating of the reinforcing fibers occurs on the surface of the obtained molded article, which deteriorates the appearance.

Method used

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  • Long fiber-reinforced propylene-based resin composition and long fiber-reinforced molded body
  • Long fiber-reinforced propylene-based resin composition and long fiber-reinforced molded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0154] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples.

[0155] (test methods)

[0156] The measurement or evaluation methods of various physical properties are as follows.

[0157] [The melt flow rate]

[0158] According to ISO 1133-1, the melt flow rate of the raw material resin was measured under the conditions of the temperature described in Table 1 and the load of 2.16 kg.

[0159] [MFR PP+mPP ]

[0160] Calculate the MFR using the above formula (3) PP+mPP .

[0161] [Melting point, heat of fusion (ΔHm)]

[0162] Melting points and heats of fusion were determined using a differential scanning calorimeter. As a measurement sample, a sheet having a thickness of 200 μm produced at 210° C. from an appropriate amount of pellets was used.

[0163] "Measurement conditions"

[0164] As a measurement device, DSC8500 manufactured by PerkinElmer Co., Ltd. was used.

[0165] About 5 mg of...

manufacture example 1

[0222] Manufacture of resins containing reinforcing fibers

[0223] use figure 1 The shown pellet production apparatus produces long-fiber-reinforced resin pellets.

[0224] figure 1 Among them, 10 is a die, 20 is an extruder for supplying molten resin to the die 10, 30 is a roll of the fiber bundle F, 40 is a set of tension rollers for applying a certain tension to the fiber bundle F introduced into the die 10, and 50 is for A cooling unit for cooling the molten resin-impregnated fiber bundle pulled out from the die 10, 60 is a fiber bundle drawing roll, and 70 is a pelletizer for cutting the drawn molten resin-impregnated fiber bundle. In this device, three independent fiber bundles F are simultaneously impregnated with molten resin.

[0225] The specific manufacturing conditions are as follows. Die: φ50m, install the die at the front end of the extruder, arrange 4 rods in a straight line in the impregnated part; Made glass roving (manufactured by NEC Glass Co., Ltd.,...

Embodiment 1

[0240] Except having changed 40 mass parts of PP2 into 20 mass parts of PP2 and 20 mass parts of PE1, it carried out similarly to the comparative example 1, and manufactured the long fiber reinforced resin composition and its molded object. Table 1 shows the evaluation results.

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Abstract

To provide a composition suitable for manufacturing a fiber-reinforced molded body having an excellent appearance and excellent mechanical properties. The present invention provides a long fiber-reinforced propylene-based resin composition containing: a long fiber-reinforced resin pellet; a modified or unmodified ethylene-based polymer (D) having a density of 865-950 kg / m<3>, a melting point of 50-105 DEG C, and a heat of fusion of at least 52 J / g; and optionally a propylene-based polymer (A2), wherein the long fiber-reinforced resin pellet contains a propylene-based polymer (A1), a reinforcing fiber (B), and a modified polypropylene (C).

Description

technical field [0001] The present invention relates to a long-fiber-reinforced propylene resin composition and a long-fiber-reinforced molded article. Background technique [0002] Fiber-reinforced resin molded articles are used in various fields such as electrical equipment, automobiles, housing equipment, and medical equipment because they are lightweight, have excellent rigidity, and heat resistance. [0003] As a fiber-reinforced resin molded article, for example, a molded article using a reinforcing fiber such as glass fiber and a thermoplastic resin such as polyamide or polypropylene is known. Such a fiber-reinforced resin molded article is used in the automotive field as a material requiring high rigidity and heat resistance, such as a fan cover in an engine room, a propeller fan, and the like. [0004] However, when a fiber-reinforced propylene-based resin composition using reinforcing fibers such as glass fibers is molded, unevenness due to floating of reinforcing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08J5/04C08K7/14C08L23/04
CPCC08K7/14C08J5/043C08J2323/12C08J2423/08C08J2423/14C08L23/12C08K9/06C08K3/04C08L23/04C08J5/244C08F222/06C08J3/12C08L23/06C08L23/142C08L23/16C08L23/26C08L53/00C08L2205/03
Inventor 小田原晶子久米田友里惠
Owner PRIME POLYMER CO LTD