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Glass fiber-reinforced resin molded article

A glass fiber and resin molding technology, applied in the field of glass fiber reinforced resin molded products, can solve the problem of heat generation of resin molded products

Pending Publication Date: 2021-10-01
NITTO BOSEIKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In general, glass absorbs energy and heat from alternating current. Therefore, if the above-mentioned resin molded product is used in the housing or parts of the above-mentioned electronic equipment, there is a problem that the resin molded product will generate heat.

Method used

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  • Glass fiber-reinforced resin molded article
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  • Glass fiber-reinforced resin molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、 comparative example 1 and comparative example 2

[0140] As shown in Table 2, the number-average fiber length, dielectric constant, and dielectric loss tangent of the glass fiber reinforced resin molded product (a flat plate with a thickness of 1 mm) were evaluated by the method described above. Here, the glass fiber-reinforced resin molded article was obtained as follows: As shown in Table 2, a twin-shaft kneader (manufactured by Toshiba Machine Co., Ltd., trade name: TEM-26SS) was used to prepare the composition A and the composition A respectively. Resin pellets were prepared by kneading glass fiber chopped strands with a fiber length of 3 mm and PBT in B or composition C, and using the obtained resin pellets, an injection molding machine (manufactured by Nisshin Plastic Industry Co., Ltd., trade name: NEX80) by injection molding to obtain the glass fiber reinforced resin molded article.

[0141] Table 2

[0142]

[0143] As shown in Table 2, it can be seen that the glass fiber-reinforced resin molded article of Example ...

Embodiment 2

[0144] (Example 2, Comparative Example 3)

[0145] As shown in Table 3, the number-average fiber length, dielectric constant, and dielectric loss tangent of the glass fiber reinforced resin molded product (a flat plate with a thickness of 1 mm) were evaluated by the method described above. Here, the glass fiber-reinforced resin molded article was obtained by mixing each of the above-mentioned composition A with a twin-shaft kneader (manufactured by Toshiba Machine Co., Ltd., trade name: TEM-26SS) as shown in Table 3. Cut fibers with a fiber length of 0.030 mm, or cut fibers with a fiber length of 0.030 mm having the above-mentioned composition B (it should be noted that the cut fibers with the above-mentioned composition B can have a fiber length in the range of 0.001 to 0.300 mm), and PBT Kneading was carried out to form resin pellets, and the obtained resin pellets were used to perform injection molding with an injection molding machine (manufactured by Nissin Plastic Indust...

Embodiment 3、 comparative example 4

[0149] As shown in Table 4, the number-average fiber length, dielectric constant, and dielectric loss tangent of the glass fiber reinforced resin molded product (a flat plate with a thickness of 1 mm) were evaluated by the method described above. Here, the glass fiber-reinforced resin molded article was produced as follows: As shown in Table 4, a twin-shaft kneader (manufactured by Toshiba Machinery Co., Ltd., trade name: TEM-26SS) was used to pair the components having the composition A or the composition A respectively. In B, glass fiber chopped strands with a fiber length of 3 mm and PEEK were kneaded to form resin pellets, and the obtained resin pellets were used for injection molding machine (manufactured by Nisshin Plastic Industry Co., Ltd., trade name: NEX80). The above glass fiber reinforced resin molded article was obtained by injection molding.

[0150] Table 4

[0151]

[0152] As shown in Table 4, it can be seen that the glass fiber reinforced resin molded art...

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Abstract

Provided is a glass fiber-reinforced resin molded article having a low dielectric constant and a low dielectric loss tangent, especially a low dielectric loss tangent, in the high-frequency region of 10 GHz and above. The glass fiber-reinforced resin molded article contains glass fibers in a range of 10-90 mass% and resin in a range of 90-10 mass% relative to the total weight of the glass fiber-reinforced resin molded article. The glass fibers have a composition that includes SiO2 in a range of 52.0-59.5 mass%, B2O3 in a range of 17.5-25.5 mass%, Al2O3 in a range of 9.0-14.0 mass%, SrO in a range of 0.5-6.0 mass%, MgO in a range of 1.0-5.0 mass%, CaO in a range of 1.0-5.0 mass%, and a total of F2 and Cl2 in a range of 0.1-2.5 mass% relative to the total weight of the glass fibers. The glass fibers have a number average fiber length of 1-10,000 [mu]m.

Description

technical field [0001] The present invention relates to a glass fiber reinforced resin molded article. Background technique [0002] Conventionally, glass fibers have been widely used for various purposes in order to increase the strength of resin molded products. Such resin molded products are increasingly used in casings or accessories of electronic devices such as smartphones and notebook computers. [0003] In general, glass absorbs energy from alternating current to absorb heat. Therefore, if the above-mentioned resin molded product is used in the housing or parts of the above-mentioned electronic equipment, there is a problem that the resin molded product will generate heat. [0004] Here, the dielectric loss energy absorbed by the glass is proportional to the dielectric constant and the dielectric loss tangent determined by the composition and structure of the glass, and the dielectric loss energy is represented by the following formula (1). [0005] W = kfv 2 ×εta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C13/00C08J5/08
CPCC03C13/00C08J5/043C08J2367/02C03C3/118C03C3/087C03C3/112C08K7/14C08K2201/004
Inventor 关川宗寿佐佐木辽高泉真央
Owner NITTO BOSEIKI CO LTD
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