JPH08176313A - Sheet molding compound and smc molded product - Google Patents
Sheet molding compound and smc molded productInfo
- Publication number
- JPH08176313A JPH08176313A JP33707494A JP33707494A JPH08176313A JP H08176313 A JPH08176313 A JP H08176313A JP 33707494 A JP33707494 A JP 33707494A JP 33707494 A JP33707494 A JP 33707494A JP H08176313 A JPH08176313 A JP H08176313A
- Authority
- JP
- Japan
- Prior art keywords
- smc
- resin
- weight
- unsaturated polyester
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
- B29C43/183—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0872—Prepregs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Reinforced Plastic Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、特に水槽（薬液層、ク
ーリングタワー等を含む）用単位パネル用として好適な
シートモールディングコンパウンド（ＳＭＣ）及びこの
ようなＳＭＣをプレス成形してなるＳＭＣ成形品（特に
水槽用単位パネル）に関する。BACKGROUND OF THE INVENTION The present invention relates to a sheet molding compound (SMC) particularly suitable for a unit panel for an aquarium (including a chemical liquid layer, a cooling tower, etc.) and an SMC molded product obtained by press-molding such an SMC ( In particular, it relates to a unit panel for aquarium)
【０００２】[0002]
【従来の技術】不飽和ポリエステル樹脂、低収縮化樹
脂、硬化剤、炭酸カルシウム等の無機充填剤及び増粘剤
を配合した樹脂組成物をロービングガラスのチョップ繊
維に含浸させた半硬化状のシートモールディングコンパ
ウンド（ＳＭＣ）をプレス成形することにより、水槽用
単位パネルを製造することは行われているが、このよう
なＳＭＣにおいては、不飽和ポリエステル樹脂として、
通常、オルソフタル酸系樹脂、イソフタル酸系樹脂、ビ
スフェノール系樹脂等が用いられている。2. Description of the Related Art A semi-cured sheet obtained by impregnating a chopping fiber of roving glass with a resin composition containing an unsaturated polyester resin, a low shrinkage resin, a curing agent, an inorganic filler such as calcium carbonate, and a thickening agent. Although a unit panel for an aquarium is manufactured by press molding a molding compound (SMC), in such an SMC, as an unsaturated polyester resin,
Usually, orthophthalic acid type resins, isophthalic acid type resins, bisphenol type resins and the like are used.
【０００３】しかし、オルソフタル酸、イソフタル酸の
異性体であるテレフタル酸を原料とするテレフタル酸系
樹脂を用いたものは知られていない。テレフタル酸系樹
脂は、イソフタル酸径樹脂より安価に入手できる利点等
があるにもかかわらず、増粘調整が難しいという問題が
あり、ＳＭＣ化が困難とされていた。However, there is no known one using a terephthalic acid resin made from terephthalic acid which is an isomer of orthophthalic acid or isophthalic acid. Although terephthalic acid resins have the advantage that they can be obtained at a lower cost than isophthalic acid resins, they have the problem that it is difficult to adjust the viscosity, and it has been difficult to use SMC.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、耐水
性、成形性に優れ、しかも外観のよいＳＭＣ成形品を得
ることができ、かつ増粘特性における上記問題を解消可
能なテレフタル酸系樹脂をベースとした特に水槽用単位
パネル用として好適なＳＭＣ及びこのようなＳＭＣをプ
レス成形してなるＳＭＣ成形品（特に水槽用単位パネ
ル）を提供することにある。The object of the present invention is to provide a terephthalic acid-based compound which is excellent in water resistance and moldability, and which can give an SMC molded product having a good appearance, and which can solve the above-mentioned problems in thickening properties. An object of the present invention is to provide a resin-based SMC particularly suitable for a unit panel for an aquarium and an SMC molded product (particularly a unit panel for an aquarium) obtained by press-molding such an SMC.
【０００５】[0005]
【課題を解決するための手段】本発明は、不飽和ポリエ
ステル樹脂、低収縮化樹脂、硬化剤、炭酸カルシウム等
の無機充填剤及び増粘剤を配合してなる樹脂組成物をロ
ービングガラスのチョップ繊維に含浸させた半硬化状の
シートモールディングコンパウンドにおいて、前記不飽
和ポリエステル樹脂としてテレフタル酸系不飽和ポリエ
ステル樹脂を用い、これと低収縮化樹脂１００重量部に
対し、増粘剤として酸化マグネウシムを０．７〜１．０
重量部添加したことを特徴とするシートモールディング
コンパウンドである。The present invention is a chopping of roving glass with a resin composition containing an unsaturated polyester resin, a low-shrinkage resin, a curing agent, an inorganic filler such as calcium carbonate, and a thickener. In a semi-cured sheet molding compound in which fibers are impregnated, a terephthalic acid-based unsaturated polyester resin is used as the unsaturated polyester resin, and 100 parts by weight of this and a low-shrinkage resin are mixed with magnesium oxide as a thickener. .7 to 1.0
The sheet molding compound is characterized by adding parts by weight.
【０００６】上記シートモールディングコンパウンド
は、好ましくは水槽用単位パネル用であり、上記の半硬
化状のシートモールディングコンパウンドをプレス成形
することにより、耐水性等が優れたＳＭＣ成形品が得ら
れ、水槽用単位パネルとして好適に用いられる。The above sheet molding compound is preferably for a unit panel for water tanks, and by press-molding the above semi-cured sheet molding compound, an SMC molded article having excellent water resistance can be obtained. It is preferably used as a unit panel.
【０００７】本発明においては、不飽和ポリエステル樹
脂としてテレフタル酸系不飽和ポリエステル樹脂を用い
ることにより、オルソフタル酸系樹脂より耐水性が良い
といわれるイソフタル酸系樹脂と同等以上の耐水性を示
す。これは、各樹脂をベースとしたＳＭＣ成形品を９５
℃の温水に浸漬したときの重量変化率を調べ、耐水性良
否の指標となるフクレ発生時間によりわかった。また、
成形性の面、コストの面でも良好であり、テレフタル酸
系不飽和ポリエステル樹脂と低収縮化樹脂１００重量部
に対し、増粘剤として酸化マグネウシムを０．７〜１．
０重量部添加することにより、増粘特性も安定化され増
粘調整が容易である。In the present invention, by using a terephthalic acid type unsaturated polyester resin as the unsaturated polyester resin, water resistance equal to or higher than that of the isophthalic acid type resin which is said to have better water resistance than the orthophthalic acid type resin is exhibited. This is a 95% SMC molded product based on each resin.
The rate of change in weight when immersed in warm water at ℃ was examined, and it was found from the blister generation time, which is an index of water resistance. Also,
It is excellent in terms of moldability and cost, and 0.7 to 1. Magnesium oxide as a thickener is added to 100 parts by weight of a terephthalic acid-based unsaturated polyester resin and a low-shrinkage resin.
By adding 0 parts by weight, the thickening property is stabilized and the thickening adjustment is easy.
【０００８】本発明に用いる低収縮化樹脂としては、ポ
リスチレン、ポリ酢酸ビニル、ポリメチルメタアクリレ
ート、ポリエチレン等が挙げられる。これらは各樹脂の
溶液をいい、ポリスチレンでは、ポリスチレン溶液つま
りポリスチレン樹脂をスチレンモノマーに溶かした液体
というように、各々のモノマーで溶かした溶液である。
テレフタル酸系不飽和ポリエステル樹脂との相溶性がよ
く、耐水性、物性の向上が図れるポリスチレンが特に好
ましい。Examples of the low-shrinkage resin used in the present invention include polystyrene, polyvinyl acetate, polymethylmethacrylate, and polyethylene. These are solutions of each resin. In polystyrene, a polystyrene solution, that is, a solution in which polystyrene resin is dissolved in styrene monomer, such as a liquid, is dissolved in each monomer.
Polystyrene, which has good compatibility with the terephthalic acid-based unsaturated polyester resin and can improve water resistance and physical properties, is particularly preferable.
【０００９】テレフタル酸系不飽和ポリエステル樹脂と
低収縮化樹脂との配合割合は、ＳＭＣの製造条件及び成
形条件にマッチするよう適宜設定されるが、通常、テレ
フタル酸系不飽和ポリエステル樹脂７５〜８５重量部に
対し低収縮化樹脂としてポリスチレン２５〜１５重量部
の範囲であり、テレフタル酸系不飽和ポリエステル樹脂
８０重量部に対し低収縮化樹脂としてポリスチレン２０
重量部が最適である。The compounding ratio of the terephthalic acid type unsaturated polyester resin and the low shrinkage resin is appropriately set so as to match the manufacturing conditions and molding conditions of the SMC, but normally, the terephthalic acid type unsaturated polyester resin 75 to 85 is used. Polystyrene is used in a range of 25 to 15 parts by weight as a low-shrinking resin, and polystyrene 20 is used as a low-shrinking resin in 80 parts by weight of a terephthalic acid-based unsaturated polyester resin.
Parts by weight are optimal.
【００１０】増粘剤として添加される酸化マグネウシム
は、活性度２０（ヨード吸着量２０ｍｇ／ｇ）程度のも
のを、テレフタル酸系不飽和ポリエステル樹脂と低収縮
化樹脂１００重量部に対し、０．７〜１．０重量部添加
する。０．７重量部より少ないとＳＭＣの増粘不足にな
り、べとつきが生じ、取扱性が悪くなる。また、１．０
重量部を超えるとＳＭＣの増粘が急速に起こり、ガラス
繊維への含浸不良を起こすとともにＳＭＣの流動性を低
下させる。Magnesium oxide added as a thickener has an activity of about 20 (iodine adsorption amount of 20 mg / g) in an amount of 0.1% with respect to 100 parts by weight of the terephthalic acid unsaturated polyester resin and the low shrinkage resin. Add 7 to 1.0 parts by weight. If the amount is less than 0.7 parts by weight, the viscosity of SMC is insufficient and stickiness occurs, resulting in poor handleability. Also, 1.0
If it exceeds the weight part, the viscosity of the SMC rapidly increases, impairing the impregnation into the glass fiber and reducing the fluidity of the SMC.
【００１１】さらに、炭酸カルシウム等の無機充填剤
（通常１００〜１５０重量部）、硬化剤（通常０．７〜
１．５重量部）、内部離型剤（通常３〜５重量部）、顔
料（通常３〜５重量部）等を所要量配合する。なお、樹
脂組成物がもともと成分中に含有する水分は０．１％以
下であるので、ＳＭＣ配合中に水分を添加して樹脂組成
物の含有水分を一定に調整することが、ＳＭＣの増粘特
性を安定化させ、ＳＭＣのハンドリング特性（フィルム
剥離性）の向上を図る上で好ましい。含有水分は、通
常、０．１５〜０．２５％の範囲であり、増粘剤の添加
量と関係するので、本発明においては、含有水分量を
０．２％にすることが望ましい。ＳＭＣの調製は常法に
より行えばよい。Further, an inorganic filler such as calcium carbonate (usually 100 to 150 parts by weight) and a curing agent (usually 0.7 to 100 parts by weight).
1.5 parts by weight), an internal release agent (usually 3 to 5 parts by weight), a pigment (usually 3 to 5 parts by weight) and the like are blended in required amounts. Since the resin composition originally has a water content of 0.1% or less, it is necessary to add water during the SMC formulation to adjust the water content of the resin composition to a constant value. It is preferable in terms of stabilizing the characteristics and improving the handling characteristics (film peeling property) of the SMC. The water content is usually in the range of 0.15 to 0.25% and is related to the added amount of the thickener. Therefore, in the present invention, the water content is preferably 0.2%. SMC may be prepared by a conventional method.
【００１２】[0012]
【実施例】下記の配合組成にて含有水分を一定（０．２
％）にし、増粘剤の酸化マグネウシム（活性度２０、協
和化学社製、商品名ＭｇＯ♯２０）の添加量を変えた樹
脂組成物を、常法によりロービングガラスのチョップ繊
維（３０重量％）に含浸させて半硬化状のＳＭＣを作製
し、その粘度（熟成４０℃×２４ｈｒ後）を調べた。増
粘剤の添加量が０．７重量部より少ないＳＭＣは樹脂組
成物の粘度が２００００ポイズ以下であり、プレス成形
用ＳＭＣとして増粘不足であり、取扱性が悪く不適であ
った。また、１．０重量部を超えると１０００００ポイ
ズを超え、ＳＭＣは含浸不良発生と流動性の低下があ
り、成形不良を起こした。増粘剤の添加量が０．７〜
１．０重量部が最適の範囲であることが確認された。Example: The water content was kept constant (0.2
%) And a resin composition in which the addition amount of the thickening agent magnesium oxide (activity 20, manufactured by Kyowa Chemical Co., Ltd., trade name MgO # 20) was changed by chopping fiber (30% by weight) of roving glass by a conventional method. To obtain a semi-cured SMC, and its viscosity (after aging 40 ° C. × 24 hours) was examined. SMC containing less than 0.7 part by weight of the thickener had a viscosity of the resin composition of 20000 poise or less and was insufficient as a SMC for press molding, and was unsuitable because of poor handleability. Further, when it exceeds 1.0 part by weight, it exceeds 100,000 poise, and SMC has defective impregnation and deterioration of fluidity, resulting in defective molding. The amount of thickener added is 0.7-
It was confirmed that 1.0 part by weight was the optimum range.
【００１３】 〔配合組成〕 低収縮化樹脂テレフタル酸系不飽和ポリエステル樹脂 （日立化成社製、商品名ポリセットＰＳ−９１３８） ８０重量部 低収縮化樹脂（ポリスチレン溶液） ２０重量部 硬化剤（ｔ−ブチルパーオキシベンゾエート） １重量部 内部離型剤（ステアリン酸亜鉛） ５重量部 充填剤（炭酸カルシウム） １２０重量部 顔料 ５重量部[Blend composition] Low shrinkage resin terephthalic acid type unsaturated polyester resin (Hitachi Chemical Co., Ltd., trade name Polyset PS-9138) 80 parts by weight Low shrinkage resin (polystyrene solution) 20 parts by weight Curing agent (t -Butyl peroxybenzoate) 1 part by weight Internal release agent (zinc stearate) 5 parts by weight Filler (calcium carbonate) 120 parts by weight Pigment 5 parts by weight
【００１４】さらに、上記の配合組成において増粘剤の
酸化マグネウシム０．９重量部を添加したＳＭＣ（１ｍ
×１ｍ，厚さ０．１８ｍｍ）を５プライ、１５ｋｇ準備
し、表面補強用の連続ガラス繊維マットと重ね合わせて
プレス金型内に載置し、次いで型締めした後、型温１４
０℃、成形圧５０ｋｇ／ｃｍ2 、加圧保持時間５分の成
形条件で、周囲にリブ付きの水槽パネル（１ｍ×１ｍ）
の成形品を得た。Further, SMC (1 m) added with 0.9 part by weight of magnesium oxide magnesium as a thickener in the above composition.
X 1 m, thickness 0.18 mm), 5 plies, 15 kg were prepared and placed in a press mold by superimposing it on a continuous glass fiber mat for surface reinforcement, then clamped, and then the mold temperature 14
A water tank panel (1 m x 1 m) with ribs on the periphery under molding conditions of 0 ° C, molding pressure of 50 kg / cm 2 and pressure holding time of 5 minutes.
A molded product of was obtained.
【００１５】得られた単位パネルは、耐水性が良好で、
従来のイソフタル酸系不飽和ポリエステル樹脂をベース
とするＳＭＣ成形品に比べ、光沢のよい外観良好な製品
であった。The obtained unit panel has good water resistance,
Compared to conventional SMC molded products based on isophthalic acid-based unsaturated polyester resin, it was a product with good gloss and good appearance.
【００１６】[0016]
【発明の効果】以上説明したように、本発明はテレフタ
ル酸系不飽和ポリエステル樹脂をベースとして構成され
ており、耐水性、成形性に優れ、しかも外観のよいＳＭ
Ｃ成形品を安価に製造することができ、特に水槽用単位
パネルとして有益である。また、増粘剤として所定量の
酸化マグネウシムを添加することにより増粘特性が安定
化し、ＳＭＣの量産化を確実に行うことができる。As described above, the present invention is based on a terephthalic acid type unsaturated polyester resin, and is excellent in water resistance and moldability and has a good appearance.
A C-molded product can be manufactured at low cost, and is particularly useful as a unit panel for an aquarium. Further, by adding a predetermined amount of magnesium oxide as a thickening agent, the thickening property is stabilized, and SMC can be mass-produced reliably.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 67/06 ＬＰＡ // Ｂ２９Ｋ 67:00 105:06 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location C08L 67/06 LPA // B29K 67:00 105: 06
Claims (4)
脂、硬化剤、炭酸カルシウム等の無機充填剤及び増粘剤
を配合してなる樹脂組成物をロービングガラスのチョッ
プ繊維に含浸させた半硬化状のシートモールディングコ
ンパウンドにおいて、前記不飽和ポリエステル樹脂とし
てテレフタル酸系不飽和ポリエステル樹脂を用い、これ
と低収縮化樹脂との１００重量部に対し、増粘剤として
酸化マグネウシムを０．７〜１．０重量部添加したこと
を特徴とするシートモールディングコンパウンド。1. A semi-cured product obtained by impregnating a chopping fiber of roving glass with a resin composition containing an unsaturated polyester resin, a low-shrinkage resin, a curing agent, an inorganic filler such as calcium carbonate, and a thickening agent. In the sheet molding compound, the unsaturated polyester resin is a terephthalic acid-based unsaturated polyester resin, and 100 parts by weight of the terephthalic acid-based unsaturated polyester resin and the low-shrinkage resin are mixed with 0.7 to 1.0 parts of magnesium oxide as a thickener. A sheet molding compound characterized by adding parts by weight.
７５〜８５重量部と低収縮化樹脂としてポリスチレン２
５〜１５重量部とからなる請求項１記載のシートモール
ディングコンパウンド。2. A terephthalic acid type unsaturated polyester resin 75 to 85 parts by weight and polystyrene 2 as a low shrinkage resin.
The sheet molding compound according to claim 1, comprising 5 to 15 parts by weight.
ンパウンドをプレス成形してなるＳＭＣ成形品。3. An SMC molded product obtained by press-molding the sheet molding compound according to claim 1.
ＳＭＣ成形品。4. The SMC molded product according to claim 3, which is a unit panel for an aquarium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33707494A JPH08176313A (en) | 1994-12-27 | 1994-12-27 | Sheet molding compound and smc molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33707494A JPH08176313A (en) | 1994-12-27 | 1994-12-27 | Sheet molding compound and smc molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08176313A true JPH08176313A (en) | 1996-07-09 |
Family
ID=18305193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33707494A Pending JPH08176313A (en) | 1994-12-27 | 1994-12-27 | Sheet molding compound and smc molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08176313A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115505A (en) * | 2013-02-28 | 2013-05-22 | 宁夏宝塔石化集团有限公司 | New efficient closed-cycle air cooling process for PTA (pure terephthalic acid) device |
| CN112724608A (en) * | 2021-01-29 | 2021-04-30 | 河北铭特环保设备科技有限公司 | Bisphenol A type SMC (sheet molding compound) molding resin composition and preparation method thereof |
| CN112812236A (en) * | 2020-12-30 | 2021-05-18 | 郑州圣莱特空心微珠新材料有限公司 | Novel SMC antenna housing for 5G communication and preparation method thereof |
| CN113897020A (en) * | 2021-11-26 | 2022-01-07 | 成都易信达科技股份有限公司 | SMC prevents shielding well lid |
| CN113980429A (en) * | 2021-11-23 | 2022-01-28 | 张志平 | Glass fiber reinforced SMC molding compound and preparation method thereof |
| CN114015218A (en) * | 2021-11-30 | 2022-02-08 | 江苏兆鋆新材料股份有限公司 | Flaky molding compound with extremely low smoke growth and flame spread index and preparation method thereof |
-
1994
- 1994-12-27 JP JP33707494A patent/JPH08176313A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115505A (en) * | 2013-02-28 | 2013-05-22 | 宁夏宝塔石化集团有限公司 | New efficient closed-cycle air cooling process for PTA (pure terephthalic acid) device |
| CN112812236A (en) * | 2020-12-30 | 2021-05-18 | 郑州圣莱特空心微珠新材料有限公司 | Novel SMC antenna housing for 5G communication and preparation method thereof |
| CN112812236B (en) * | 2020-12-30 | 2024-02-23 | 郑州圣莱特空心微珠新材料有限公司 | SMC antenna housing for 5G communication and preparation method thereof |
| CN112724608A (en) * | 2021-01-29 | 2021-04-30 | 河北铭特环保设备科技有限公司 | Bisphenol A type SMC (sheet molding compound) molding resin composition and preparation method thereof |
| CN113980429A (en) * | 2021-11-23 | 2022-01-28 | 张志平 | Glass fiber reinforced SMC molding compound and preparation method thereof |
| CN113897020A (en) * | 2021-11-26 | 2022-01-07 | 成都易信达科技股份有限公司 | SMC prevents shielding well lid |
| CN114015218A (en) * | 2021-11-30 | 2022-02-08 | 江苏兆鋆新材料股份有限公司 | Flaky molding compound with extremely low smoke growth and flame spread index and preparation method thereof |
| CN114015218B (en) * | 2021-11-30 | 2023-03-10 | 江苏兆鋆新材料股份有限公司 | Flaky molding compound with extremely low smoke growth and flame spread index and preparation method thereof |
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