JPWO2020112396A5 - - Google Patents

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JPWO2020112396A5
JPWO2020112396A5 JP2021529314A JP2021529314A JPWO2020112396A5 JP WO2020112396 A5 JPWO2020112396 A5 JP WO2020112396A5 JP 2021529314 A JP2021529314 A JP 2021529314A JP 2021529314 A JP2021529314 A JP 2021529314A JP WO2020112396 A5 JPWO2020112396 A5 JP WO2020112396A5
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composition
glass
glass fiber
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JP2022507967A (en
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Priority claimed from PCT/US2019/061917 external-priority patent/WO2020112396A2/en
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本出願の発明を一般的及び特定の実施形態の両方に関して記述してきた。本発明は、好ましい実施形態と考えられるものについて記載してきたが、一般的開示の範囲内で当業者に既知の多種多様の代替物を選択可能である。本発明は、以降で記載される特許請求の範囲の詳細説明を除き、限定されるものではない。
本発明のまた別の態様は、以下のとおりであってもよい。
〔１〕５８．０～６８．０質量％の量のＳｉＯ 2 ；
１８．０～２３．０質量％の量のＡｌ 2 Ｏ 3 ；
１．０～９．０質量％の量のＣａＯ；
９．０～１４．０質量％の量のＭｇＯ；
０．０～１．０質量％の量のＳｒＯ；
０．０～１．０質量％の量のＮａ 2 Ｏ；
０．０～１．０未満の質量％の量のＫ 2 Ｏ；
０．０～４．０質量％の量のＬｉ 2 Ｏ；
０．０～４．０質量％の量のＴｉＯ 2 ；
０～１０．０質量％の量のＹ 2 Ｏ 3 ；
０～１０．０質量％の量のＬａ 2 Ｏ 3 ；
０～２．５質量％の量のＣｅ 2 Ｏ 3 ；及び
０～４．０質量％の量のＳｃ 2 Ｏ 3 を含むガラス組成物であって、２．１より大きいＭｇＯ／（ＣａＯ＋ＳｒＯ）比を有し、前記ガラス組成物から形成されるガラス繊維が３４．０～４０．０ＭＪ／ｋｇの比弾性率を有する、ガラス組成物。
〔２〕０～約５．０質量％のＴａ 2 Ｏ 5 ；
０～約７．０質量％のＧａ 2 Ｏ 3 ；
０～約５．０質量％のＮｂ 2 Ｏ 5 ；及び
０～約５．０質量％のＶ 2 Ｏ 5 、を更に含む、前記〔１〕に記載のガラス組成物。
〔３〕前記組成物が、１．０～３．５質量％のＹ 2 Ｏ 3 を含む、前記〔２〕に記載のガラス組成物。
〔４〕前記ＭｇＯ及びＣａＯの組み合わせた量が、１２．０～２０質量％である、前記〔１〕～〔３〕のいずれか１項に記載のガラス組成物。
〔５〕前記組成物が、１８．３～２２．０質量％のＡｌ 2 Ｏ 3 を含む、前記〔１〕～〔４〕のいずれか１項に記載のガラス組成物。
〔６〕前記組成物が、Ｂ 2 Ｏ 3 、Ｆ、Ｋ 2 Ｏ、及びＮａ 2 Ｏの内の１種又は複数を実質的に含まない、前記〔１〕～〔５〕のいずれか１項に記載のガラス組成物。
〔７〕前記組成物が、０．１～３．５質量％のＬｉ 2 Ｏを含む、前記〔１〕～〔６〕のいずれか１項に記載のガラス組成物。
〔８〕前記組成物が、０．０５質量％未満のＳｍ 2 Ｏ 3 ＋Ｇｄ 2 Ｏ 3 を含む、前記〔１〕～〔７〕のいずれか１項に記載のガラス組成物。
〔９〕前記組成物が、少なくとも１質量％のＹ 2 Ｏ 3 、Ｌａ 2 Ｏ 3 、Ｃｅ 2 Ｏ 3 、及びＳｃ 2 Ｏ 3 を組み合わせた量を含む、前記〔１〕～〔８〕のいずれか１項に記載のガラス組成物。
〔１０〕前記組成物が、１，４５４℃（２，６５０°Ｆ）未満の繊維化温度を有する、前記〔１〕～〔９〕のいずれか１項に記載のガラス組成物。
〔１１〕５５．０～６８．０質量％の量のＳｉＯ 2 ；
１８．０～２３．０質量％の量のＡｌ 2 Ｏ 3 ；
１～５．５質量％の量のＣａＯ；
９．０～１４．０質量％の量のＭｇＯ；
０．０～１．０質量％の量のＮａ 2 Ｏ；
０．０～１．０質量％の量のＫ 2 Ｏ；
１．０～４．０質量％の量のＬｉ 2 Ｏ；
０．０～４．０質量％の量のＴｉＯ 2 ；
０～１０．０質量％の量のＹ 2 Ｏ 3 ；
０～１０．０質量％の量のＬａ 2 Ｏ 3 ；
０～２．５質量％の量のＣｅ 2 Ｏ 3 ；及び
０～４．０質量％の量のＳｃ 2 Ｏ 3 を含む組成物から形成されるガラス繊維であって、３４．０～４０．０ＭＪ／ｋｇの比弾性率及び少なくとも４４００ＭＰａのＡＳＴＭ Ｄ２３４３－０９による引張強度を有する、ガラス繊維。
〔１２〕前記ガラス組成物が、１．０～５．０質量％のＣａＯを含む、前記〔１１〕に記載のガラス繊維。
〔１３〕前記組成物が、Ｂ 2 Ｏ 3 、Ｆ、Ｋ 2 Ｏ、及びＮａ 2 Ｏの内の１種又は複数を実質的に含まない、前記〔１１〕又は〔１２〕に記載のガラス繊維。
〔１４〕前記組成物が、１．５～３．５質量％のＬｉ 2 Ｏを含む、前記〔１１〕～〔１３〕のいずれか１項に記載のガラス繊維。
〔１５〕前記組成物が、少なくとも１質量％のＹ 2 Ｏ 3 、Ｌａ 2 Ｏ 3 、Ｃｅ 2 Ｏ 3 、及びＳｃ 2 Ｏ 3 を組み合わせた量を含む、前記〔１１〕～〔１４〕のいずれか１項に記載のガラス繊維。
〔１６〕前記組成物が、２．０質量％より多いＣｅＯ 2 ＋Ｓｃ 2 Ｏ 3 を含む、前記〔１１〕～〔１５〕のいずれか１項に記載のガラス繊維。
〔１７〕前記ガラス繊維が、３５～３６．５ＭＪ／ｋｇの比弾性率を有する、前記〔１１〕～〔１６〕のいずれか１項に記載のガラス繊維。
〔１８〕連続ガラス繊維を形成する方法であって、
前記〔１〕に記載の融解組成物を用意すること；及び
前記融解組成物を、オリフィスを通して引き、連続ガラス繊維を形成すること、を含む方法。
〔１９〕強化複合材料製品であって、
ポリマーマトリックス；及び
５８．０～６８．０質量％の量のＳｉＯ 2 ；
１８．０～２３．０質量％の量のＡｌ 2 Ｏ 3 ；
１．０～９．０質量％の量のＣａＯ；
９．０～１４．０質量％の量のＭｇＯ；
０．０～１．０質量％の量のＳｒＯ；
０．０～１．０質量％の量のＮａ 2 Ｏ；
０．０～１．０未満の質量％の量のＫ 2 Ｏ；
０．０～４．０質量％の量のＬｉ 2 Ｏ；
０．０～４．０質量％の量のＴｉＯ 2 ；
０～１０．０質量％の量のＹ 2 Ｏ 3 ；
０～１０．０質量％の量のＬａ 2 Ｏ 3 ；
０～２．５質量％の量のＣｅ 2 Ｏ 3 ；及び
０～４．０質量％の量のＳｃ 2 Ｏ 3 を含むガラス組成物から形成される複数のガラス繊維を含み、前記ガラス組成物が２．１より大きいＭｇＯ／（ＣａＯ＋ＳｒＯ）比を有し、前記ガラス繊維が３４．０～４０．０ＭＪ／ｋｇの比弾性率を有する、強化複合材料製品。
〔２０〕風力タービンブレードの形態である、前記〔１９〕に記載の強化複合材料製品。 The invention of this application has been described both generically and in terms of specific embodiments. Although the present invention has been described in what are considered to be the preferred embodiments, a wide variety of alternatives known to those skilled in the art can be selected within the scope of the general disclosure. The invention is not limited except in the recitation of the claims set forth below.
Another aspect of the present invention may be as follows.
[1] SiO 2 in an amount of 58.0 to 68.0% by weight ;
Al 2 O 3 in an amount of 18.0-23.0% by weight ;
CaO in an amount of 1.0-9.0% by weight;
MgO in an amount of 9.0-14.0% by weight;
SrO in an amount of 0.0-1.0% by weight;
Na 2 O in an amount of 0.0-1.0% by weight ;
K 2 O in an amount of 0.0 to less than 1.0% by weight ;
Li 2 O in an amount of 0.0-4.0% by weight ;
TiO 2 in an amount of 0.0-4.0% by weight ;
Y 2 O 3 in an amount of 0-10.0% by weight ;
La 2 O 3 in an amount of 0-10.0% by weight ;
Ce 2 O 3 in an amount of 0-2.5% by weight ; and
A glass composition comprising Sc 2 O 3 in an amount of 0-4.0 wt. A glass composition having a specific elastic modulus of 0 to 40.0 MJ/kg.
[2] 0 to about 5.0% by weight Ta 2 O 5 ;
0 to about 7.0% by weight Ga 2 O 3 ;
0 to about 5.0 weight percent Nb 2 O 5 ; and
The glass composition according to [1] above, further comprising 0 to about 5.0% by mass of V 2 O 5 .
[3] The glass composition according to [2] above, wherein the composition contains 1.0 to 3.5% by mass of Y 2 O 3 .
[4] The glass composition according to any one of [1] to [3] above, wherein the combined amount of MgO and CaO is 12.0 to 20% by mass.
[5] The glass composition according to any one of [1] to [4], wherein the composition contains 18.3 to 22.0% by mass of Al 2 O 3 .
[6] Any one of [1] to [5] above, wherein the composition does not substantially contain one or more of B 2 O 3 , F, K 2 O, and Na 2 O. The glass composition according to .
[7] The glass composition according to any one of [1] to [6], wherein the composition contains 0.1 to 3.5% by mass of Li 2 O.
[8] The glass composition according to any one of [1] to [7], wherein the composition contains less than 0.05% by mass of Sm 2 O 3 +Gd 2 O 3 .
[9] Any of the above [1] to [8], wherein the composition contains a combined amount of at least 1% by mass of Y 2 O 3 , La 2 O 3 , Ce 2 O 3 and Sc 2 O 3 1. The glass composition according to claim 1.
[10] The glass composition of any one of [1] to [9] above, wherein the composition has a fiberizing temperature of less than 1,454°C (2,650°F).
[11] SiO 2 in an amount of 55.0 to 68.0% by weight ;
Al 2 O 3 in an amount of 18.0-23.0% by weight ;
CaO in an amount of 1-5.5% by weight;
MgO in an amount of 9.0-14.0% by weight;
Na 2 O in an amount of 0.0-1.0% by weight ;
K 2 O in an amount of 0.0-1.0% by weight ;
Li 2 O in an amount of 1.0-4.0% by weight ;
TiO 2 in an amount of 0.0-4.0% by weight ;
Y 2 O 3 in an amount of 0-10.0% by weight ;
La 2 O 3 in an amount of 0-10.0% by weight ;
Ce 2 O 3 in an amount of 0-2.5% by weight ; and
A glass fiber formed from a composition comprising Sc 2 O 3 in an amount of 0-4.0% by weight and having a specific modulus of 34.0-40.0 MJ/kg and at least 4400 MPa according to ASTM D2343-09. Glass fiber with tensile strength.
[12] The glass fiber according to [11] above, wherein the glass composition contains 1.0 to 5.0% by mass of CaO.
[13] The glass fiber of [11] or [12] above, wherein the composition does not substantially contain one or more of B 2 O 3 , F, K 2 O, and Na 2 O. .
[14] The glass fiber according to any one of [11] to [13] above, wherein the composition contains 1.5 to 3.5% by mass of Li 2 O.
[15] Any of the above [11] to [14], wherein the composition contains a combined amount of at least 1% by mass of Y 2 O 3 , La 2 O 3 , Ce 2 O 3 and Sc 2 O 3 or the glass fiber according to item 1.
[16] The glass fiber according to any one of [11] to [15] above , wherein the composition contains more than 2.0% by mass of CeO 2 +Sc 2 O 3 .
[17] The glass fiber according to any one of [11] to [16] above, which has a specific elastic modulus of 35 to 36.5 MJ/kg.
[18] A method for forming continuous glass fibers,
preparing the melting composition according to [1] above; and
drawing the molten composition through an orifice to form a continuous glass fiber.
[19] A reinforced composite material product comprising:
a polymer matrix; and
SiO 2 in an amount of 58.0-68.0% by weight ;
Al 2 O 3 in an amount of 18.0-23.0% by weight ;
CaO in an amount of 1.0-9.0% by weight;
MgO in an amount of 9.0-14.0% by weight;
SrO in an amount of 0.0-1.0% by weight;
Na 2 O in an amount of 0.0-1.0% by weight ;
K 2 O in an amount of 0.0 to less than 1.0% by weight ;
Li 2 O in an amount of 0.0-4.0% by weight ;
TiO 2 in an amount of 0.0-4.0% by weight ;
Y 2 O 3 in an amount of 0-10.0% by weight ;
La 2 O 3 in an amount of 0-10.0% by weight ;
Ce 2 O 3 in an amount of 0-2.5% by weight ; and
comprising a plurality of glass fibers formed from a glass composition comprising Sc 2 O 3 in an amount of 0-4.0% by weight , said glass composition having a MgO/(CaO+SrO) ratio of greater than 2.1; A reinforced composite product, wherein said glass fibers have a specific modulus of 34.0-40.0 MJ/kg.
[20] The reinforced composite material product of [19] above, which is in the form of a wind turbine blade.

Claims (20)

５０．０～６０．５質量％の量のＳｉＯ2；
１９．５～２３．０質量％の量のＡｌ2Ｏ3；
２．０～９．０質量％の量のＣａＯ；
９．０～１４．０質量％の量のＭｇＯ；
０．０～１．０質量％の量のＳｒＯ；
０．０～１．０質量％の量のＮａ2Ｏ；
０．０～１．０未満の質量％の量のＫ2Ｏ；
０．０～４．０質量％の量のＬｉ2Ｏ；
０．０～４．０質量％の量のＴｉＯ2；
０～１０．０質量％の量のＹ2Ｏ3；
０～１０．０質量％の量のＬａ2Ｏ3；
０～２．５質量％の量のＣｅ2Ｏ3；及び
０～４．０質量％の量のＳｃ2Ｏ3を含むガラス組成物であって、２．１より大きいＭｇＯ／（ＣａＯ＋ＳｒＯ）比を有し、前記ガラス組成物から形成されるガラス繊維が３４．０～４０．０ＭＪ／ｋｇの比弾性率を有する、ガラス組成物。 SiO 2 in an amount of 50.0 to 60.5 % by weight;
Al 2 O 3 in an amount of 19.5-23.0 % by weight;
CaO in an amount of 2.0 to 9.0% by weight;
MgO in an amount of 9.0-14.0% by weight;
SrO in an amount of 0.0-1.0% by weight;
Na 2 O in an amount of 0.0-1.0% by weight;
K 2 O in an amount of 0.0 to less than 1.0% by weight;
Li 2 O in an amount of 0.0-4.0% by weight;
TiO 2 in an amount of 0.0-4.0% by weight;
Y 2 O 3 in an amount of 0-10.0% by weight;
La 2 O 3 in an amount of 0-10.0% by weight;
A glass composition comprising Ce 2 O 3 in an amount of 0-2.5% by weight; and Sc 2 O 3 in an amount of 0-4.0% by weight, wherein the MgO/(CaO+SrO) ratio is greater than 2.1. and wherein glass fibers formed from the glass composition have a specific elastic modulus of 34.0 to 40.0 MJ/kg. ０～約５．０質量％のＴａ2Ｏ5；
０～約７．０質量％のＧａ2Ｏ3；
０～約５．０質量％のＮｂ2Ｏ5；及び
０～約５．０質量％のＶ2Ｏ5、を更に含む、請求項１に記載のガラス組成物。 0 to about 5.0 weight percent Ta 2 O 5 ;
0 to about 7.0% by weight Ga 2 O 3 ;
2. The glass composition of claim 1, further comprising: 0 to about 5.0 weight percent Nb 2 O 5 ; and 0 to about 5.0 weight percent V 2 O 5 . 前記組成物が、１．０～３．５質量％のＹ2Ｏ3を含む、請求項２に記載のガラス組成物。 3. The glass composition of claim 2, wherein the composition comprises 1.0-3.5% by weight of Y 2 O 3 . 前記ＭｇＯ及びＣａＯの組み合わせた量が、１２．０～２０質量％である、請求項１～３のいずれか１項に記載のガラス組成物。 A glass composition according to any preceding claim, wherein the combined amount of MgO and CaO is from 12.0 to 20% by weight. 前記組成物が、１８．３～２２．０質量％のＡｌ2Ｏ3を含む、請求項１～４のいずれか１項に記載のガラス組成物。 A glass composition according to any one of the preceding claims, wherein said composition comprises 18.3-22.0% by weight Al 2 O 3 . 前記組成物が、Ｂ2Ｏ3、Ｆ、Ｋ2Ｏ、及びＮａ2Ｏの内の１種又は複数を実質的に含まない、請求項１～５のいずれか１項に記載のガラス組成物。 A glass composition according to any preceding claim, wherein the composition is substantially free of one or more of B 2 O 3 , F, K 2 O and Na 2 O. . 前記組成物が、０．１～３．５質量％のＬｉ2Ｏを含む、請求項１～６のいずれか１項に記載のガラス組成物。 A glass composition according to any one of the preceding claims, wherein said composition comprises 0.1-3.5% by weight Li 2 O. 前記組成物が、０．０５質量％未満のＳｍ2Ｏ3＋Ｇｄ2Ｏ3を含む、請求項１～７のいずれか１項に記載のガラス組成物。 A glass composition according to any one of the preceding claims, wherein said composition contains less than 0.05% by weight of Sm 2 O 3 +Gd 2 O 3 . 前記組成物が、少なくとも１質量％のＹ2Ｏ3、Ｌａ2Ｏ3、Ｃｅ2Ｏ3、及びＳｃ2Ｏ3を組み合わせた量を含む、請求項１～８のいずれか１項に記載のガラス組成物。 9. The composition according to any one of the preceding claims, wherein the composition comprises a combined amount of at least 1% by weight of Y 2 O 3 , La 2 O 3 , Ce 2 O 3 and Sc 2 O 3 . glass composition. 前記組成物が、１，４５４℃（２，６５０°Ｆ）未満の繊維化温度を有する、請求項１～９のいずれか１項に記載のガラス組成物。 A glass composition according to any preceding claim, wherein the composition has a fiberizing temperature of less than 2650°F (1454°C). ５５．０～６０．５質量％の量のＳｉＯ2；
１９．５～２３．０質量％の量のＡｌ2Ｏ3；
２．０～５．５質量％の量のＣａＯ；
９．０～１４．０質量％の量のＭｇＯ；
０．０～１．０質量％の量のＮａ2Ｏ；
０．０～１．０質量％の量のＫ2Ｏ；
１．０超～４．０質量％の量のＬｉ2Ｏ；
０．０～４．０質量％の量のＴｉＯ2；
０～１０．０質量％の量のＹ2Ｏ3；
０～１０．０質量％の量のＬａ2Ｏ3；
０～２．５質量％の量のＣｅ2Ｏ3；及び
０～４．０質量％の量のＳｃ2Ｏ3を含む組成物から形成されるガラス繊維であって、３４．０～４０．０ＭＪ／ｋｇの比弾性率及び少なくとも４４００ＭＰａのＡＳＴＭ Ｄ２３４３－０９による引張強度を有する、ガラス繊維。 SiO 2 in an amount of 55.0-60.5 % by weight;
Al 2 O 3 in an amount of 19.5-23.0 % by weight;
CaO in an amount of 2.0 to 5.5% by weight;
MgO in an amount of 9.0-14.0% by weight;
Na 2 O in an amount of 0.0-1.0% by weight;
K 2 O in an amount of 0.0-1.0% by weight;
Li 2 O in an amount greater than 1.0 to 4.0% by weight;
TiO 2 in an amount of 0.0-4.0% by weight;
Y 2 O 3 in an amount of 0-10.0% by weight;
La 2 O 3 in an amount of 0-10.0% by weight;
A glass fiber formed from a composition comprising: Ce 2 O 3 in an amount of 0-2.5% by weight; and Sc 2 O 3 in an amount of 0-4.0% by weight; A glass fiber having a specific modulus of 0 MJ/kg and a tensile strength according to ASTM D2343-09 of at least 4400 MPa. 前記ガラス組成物が、１．０～５．０質量％のＣａＯを含む、請求項１１に記載のガラス繊維。 The glass fiber according to claim 11, wherein the glass composition contains 1.0-5.0 wt% CaO. 前記組成物が、Ｂ2Ｏ3、Ｆ、Ｋ2Ｏ、及びＮａ2Ｏの内の１種又は複数を実質的に含まない、請求項１１又は１２に記載のガラス繊維。 13. The glass fiber according to claim 11 or 12, wherein said composition is substantially free of one or more of B2O3 , F, K2O and Na2O . 前記組成物が、１．５～３．５質量％のＬｉ2Ｏを含む、請求項１１～１３のいずれか１項に記載のガラス繊維。 A glass fiber according to any one of claims 11 to 13, wherein said composition comprises 1.5 to 3.5% by weight Li 2 O. 前記組成物が、少なくとも１質量％のＹ2Ｏ3、Ｌａ2Ｏ3、Ｃｅ2Ｏ3、及びＳｃ2Ｏ3を組み合わせた量を含む、請求項１１～１４のいずれか１項に記載のガラス繊維。 15. The composition according to any one of claims 11 to 14, wherein the composition comprises a combined amount of at least 1 % by weight of Y2O3 , La2O3 , Ce2O3 and Sc2O3 . fiberglass. 前記組成物が、２．０質量％より多いＣｅＯ2＋Ｓｃ2Ｏ3を含む、請求項１１～１５のいずれか１項に記載のガラス繊維。 A glass fiber according to any one of claims 11 to 15, wherein said composition comprises more than 2.0% by weight of CeO 2 +Sc 2 O 3 . 前記ガラス繊維が、３５～３６．５ＭＪ／ｋｇの比弾性率を有する、請求項１１～１６のいずれか１項に記載のガラス繊維。 The glass fiber according to any one of claims 11 to 16, wherein said glass fiber has a specific modulus of 35 to 36.5 MJ/kg. 連続ガラス繊維を形成する方法であって、
請求項１に記載の融解組成物を用意すること；及び
前記融解組成物を、オリフィスを通して引き、連続ガラス繊維を形成すること、を含む方法。 A method of forming a continuous glass fiber comprising:
A method comprising: providing a molten composition according to claim 1; and drawing said molten composition through an orifice to form a continuous glass fiber. 強化複合材料製品であって、
ポリマーマトリックス；及び
５０．０～６０．５質量％の量のＳｉＯ2；
１９．５～２３．０質量％の量のＡｌ2Ｏ3；
２．０～９．０質量％の量のＣａＯ；
９．０～１４．０質量％の量のＭｇＯ；
０．０～１．０質量％の量のＳｒＯ；
０．０～１．０質量％の量のＮａ2Ｏ；
０．０～１．０未満の質量％の量のＫ2Ｏ；
０．０～４．０質量％の量のＬｉ2Ｏ；
０．０～４．０質量％の量のＴｉＯ2；
０～１０．０質量％の量のＹ2Ｏ3；
０～１０．０質量％の量のＬａ2Ｏ3；
０～２．５質量％の量のＣｅ2Ｏ3；及び
０～４．０質量％の量のＳｃ2Ｏ3を含むガラス組成物から形成される複数のガラス繊維を含み、前記ガラス組成物が２．１より大きいＭｇＯ／（ＣａＯ＋ＳｒＯ）比を有し、前記ガラス繊維が３４．０～４０．０ＭＪ／ｋｇの比弾性率を有する、強化複合材料製品。 A reinforced composite material product comprising:
a polymer matrix; and
SiO 2 in an amount of 50.0 to 60.5 % by weight;
Al 2 O 3 in an amount of 19.5-23.0 % by weight;
CaO in an amount of 2.0 to 9.0% by weight;
MgO in an amount of 9.0-14.0% by weight;
SrO in an amount of 0.0-1.0% by weight;
Na 2 O in an amount of 0.0-1.0% by weight;
K 2 O in an amount of 0.0 to less than 1.0% by weight;
Li 2 O in an amount of 0.0-4.0% by weight;
TiO 2 in an amount of 0.0-4.0% by weight;
Y 2 O 3 in an amount of 0-10.0% by weight;
La 2 O 3 in an amount of 0-10.0% by weight;
a plurality of glass fibers formed from a glass composition comprising Ce 2 O 3 in an amount of 0 to 2.5% by weight; and Sc 2 O 3 in an amount of 0 to 4.0% by weight, said glass composition is greater than 2.1 and said glass fibers have a specific modulus of 34.0-40.0 MJ/kg. 風力タービンブレードの形態である、請求項１９に記載の強化複合材料製品。 20. A reinforced composite article according to claim 19 in the form of a wind turbine blade.
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