JPH0258297B2 - - Google Patents
Info
- Publication number
- JPH0258297B2 JPH0258297B2 JP3791181A JP3791181A JPH0258297B2 JP H0258297 B2 JPH0258297 B2 JP H0258297B2 JP 3791181 A JP3791181 A JP 3791181A JP 3791181 A JP3791181 A JP 3791181A JP H0258297 B2 JPH0258297 B2 JP H0258297B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- thermoplastic resin
- mica
- calcium carbonate
- 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.)
- Expired
Links
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 28
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 14
- 239000010445 mica Substances 0.000 claims description 14
- 229910052618 mica group Inorganic materials 0.000 claims description 14
- 239000005338 frosted glass Substances 0.000 claims description 13
- 229920005992 thermoplastic resin Polymers 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 239000011342 resin composition Substances 0.000 claims description 9
- 229920006352 transparent thermoplastic Polymers 0.000 claims description 7
- 239000004793 Polystyrene Substances 0.000 claims description 5
- 229920002223 polystyrene Polymers 0.000 claims description 5
- 238000002834 transmittance Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 229920007962 Styrene Methyl Methacrylate Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 229920001893 acrylonitrile styrene Polymers 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Description
本発明は、すりガラス調の外観を有する熱可塑
性樹脂組成物に関するものである。
従来、照明器具および卓上容器等にポリスチレ
ンのごとき硬質、透明性の熱可塑性樹脂が多く用
いられている。これらの用途において、装飾性を
さらに付与した材料の要望があるが、すりガラス
調の外観を有する成形物はこの要望にそうもので
ある。
熱可塑性樹脂成形物にすりガラス調の外観を与
える方法としては、熱可塑性樹脂例えばポリスチ
レンに炭酸カルシウム、ガラス繊維等の無機物を
添加し成形する方法が知られている。しかしなが
ら、これらのものは十分なすりガラス感が無いと
か価格が高い等のため、顧客の要望を満足するも
のではなかつた。
本発明者らは、すりガラス調の好ましい外観を
有する射出成形品に適する熱可塑性樹脂組成物を
得るべく研究の結果、硬質、透明性の熱可塑性樹
脂に炭酸カルシウムとマイカとを併用混和するこ
とにより所期の目的を達成する樹脂組成物が得ら
れることを見出し本発明に到達した。
すなわち、本発明の要旨は、硬質透明性の熱可
塑性樹脂100重量部に、炭酸カルシウム0.5〜5.0
重量部、マイカ0.05〜1.5重量部を均一に分散し
てなるすりガラス調の外観を有する熱可塑性樹脂
組成物にある。
本発明において、硬質透明性の熱可塑性樹脂と
は、ロツクウエル硬度Ｍスケールで75以上
（ASTM D785による）であり、可視光線透過率
80％以上（ASTM D1003による）の熱可塑性樹
脂をいう。具体例をあげると、ポリスチレン、ア
クリロニトリル−スチレン共重合体、ポリメチル
メタアクリレート、ポリカーボネート、スチレン
−メチルメタアクリレート共重合体、透明ナイロ
ンのごとき透明性のよい硬質の樹脂である。
本発明において、炭酸カルシウムは微細均一な
１〜10μの粒子のもの例えば５±0.5μ程度のもの
が好ましい。
本発明において、マイカは微粉砕された鱗片状
のものが好ましく粒度は約３〜10μのものが好ま
しい。
本発明において、硬質透明性熱可塑性樹脂、炭
酸カルシウムおよびマイカの混和は、固体状態あ
るいは溶融状態において行い、通常の熱可塑性樹
脂の溶融成形機にて射出成形する。例えば各種混
合機でブレンドしペレツト状にしてから押出機に
より射出成形するとすりガラス調の外観を有する
射出成形品が得られる。
本発明の樹脂組成物の混和比は、樹脂100重量
部に対し、炭酸カルシウム0.5〜5.0重量部好まし
くは1.0〜2.0重量部、マイカ0.05〜1.5重量部好ま
しくは0.2〜0.4重量部である。
炭酸カルシウムが0.5重量部未満、マイカ0.05
重量部未満では光透過性が高すぎるためにすりガ
ラス調とはならず、また炭酸カルシウム5.0重量
部、マイカ1.5重量部を越えると光を遮断し過ぎ
て好ましくない。
また、炭酸カルシウム、マイカそれぞれ単独で
はすりガラス調の外観を有する射出成形品を得る
ことはできない。
本発明樹脂組成物のすりガラス調の外観は次の
基準内のものにより得られる。
全光線透過率 65〜80％
くもり価 80〜90％
（Haze Value）
（いずれもASTM D1003、試験成形品肉厚3.2
mm）
上記の範囲外のものは好ましいすりガラス調の
外観を有しない。
本発明における熱可塑性樹脂には、通常使用さ
れる紫外線吸収剤（例えばチヌビンＰなど）、お
よび酸化防止剤（例えばイルガノツクス、BHT
など）を添加してもよい。
実施例 １
旭ダウ株式会社製スタイロン
×G805（ポリス
チレン）100重量部当り炭酸カルシウム（ヒプロ
ンＡ、白石カルシウム(株)製、５±0.5μ粒度）1.5
重量部、マイカ（マイカ65、日本光研(株)製、６〜
7μの鱗片状）0.3重量部添加し、ドラムブレンダ
ーにて混合した後、単軸押出機にてペレツト化
し、そのペレツトを射出成形してカラープレート
を得た。
比較例 １
炭酸カルシウムを使用したが、マイカを使用し
ない外は実施例１とすべて同様とした。
比較例 ２
マイカを使用したが、炭酸カルシウムを使用し
ない外は実施例１とすべて同様とした。
次に実施例、比較例の各成形プレートの
ASTMD1003による試験結果と外観を次表に示
す。
The present invention relates to a thermoplastic resin composition having a frosted glass appearance. Conventionally, hard, transparent thermoplastic resins such as polystyrene have been widely used in lighting equipment, tabletop containers, and the like. In these applications, there is a demand for materials with additional decorative properties, and molded products with a frosted glass appearance are likely to meet this demand. As a method of giving a frosted glass appearance to a thermoplastic resin molded article, a method is known in which an inorganic substance such as calcium carbonate or glass fiber is added to a thermoplastic resin such as polystyrene and then molded. However, these products did not satisfy customer needs because they lacked a sufficient frosted glass feel and were expensive. As a result of research to obtain a thermoplastic resin composition suitable for injection molded products having a preferable frosted-glass appearance, the present inventors found that by blending together calcium carbonate and mica into a hard, transparent thermoplastic resin. The inventors have discovered that a resin composition that achieves the intended purpose can be obtained and have arrived at the present invention. That is, the gist of the present invention is to add 0.5 to 5.0 parts of calcium carbonate to 100 parts by weight of a hard transparent thermoplastic resin.
A thermoplastic resin composition having a frosted glass appearance is obtained by uniformly dispersing 0.05 to 1.5 parts by weight of mica. In the present invention, a hard transparent thermoplastic resin has a hardness of 75 or more on the Rockwell M scale (according to ASTM D785), and has a visible light transmittance.
Thermoplastic resin with a content of 80% or more (according to ASTM D1003). Specific examples include hard resins with good transparency such as polystyrene, acrylonitrile-styrene copolymer, polymethyl methacrylate, polycarbonate, styrene-methyl methacrylate copolymer, and transparent nylon. In the present invention, calcium carbonate preferably has fine, uniform particles of 1 to 10 μm, for example, about 5±0.5 μm. In the present invention, the mica is preferably finely pulverized in the form of scales, and preferably has a particle size of about 3 to 10 microns. In the present invention, the hard transparent thermoplastic resin, calcium carbonate, and mica are mixed in a solid state or in a molten state, and injection molded using a common thermoplastic resin melt molding machine. For example, if the mixture is blended in various mixers, made into pellets, and then injection molded in an extruder, an injection molded product having a frosted glass appearance can be obtained. The mixing ratio of the resin composition of the present invention is 0.5 to 5.0 parts by weight of calcium carbonate, preferably 1.0 to 2.0 parts by weight, and 0.05 to 1.5 parts by weight of mica, preferably 0.2 to 0.4 parts by weight, per 100 parts by weight of the resin. Calcium carbonate less than 0.5 parts by weight, mica 0.05
If it is less than 1 part by weight, the light transmittance will be too high and it will not have a frosted glass appearance, and if it exceeds 5.0 parts by weight of calcium carbonate or 1.5 parts by weight of mica, it will block too much light, which is undesirable. In addition, it is not possible to obtain an injection molded product having a frosted glass appearance by using calcium carbonate or mica alone. The frosted glass appearance of the resin composition of the present invention can be obtained within the following criteria. Total light transmittance 65-80% Haze value 80-90% (both ASTM D1003, test molded product wall thickness 3.2)
mm) Those outside the above range do not have the desirable frosted glass appearance. The thermoplastic resin used in the present invention includes commonly used ultraviolet absorbers (for example, Tinuvin P, etc.) and antioxidants (for example, Irganox, BHT, etc.).
etc.) may be added. Example 1 Styron manufactured by Asahi Dow Co., Ltd. × Calcium carbonate (Hypron A, manufactured by Shiraishi Calcium Co., Ltd., 5 ± 0.5 μ particle size) 1.5 per 100 parts by weight of G805 (polystyrene)
Weight part, Mica (Mica 65, manufactured by Nihon Koken Co., Ltd., 6~
After adding 0.3 parts by weight of 7μ scales and mixing in a drum blender, pellets were formed in a single screw extruder, and the pellets were injection molded to obtain color plates. Comparative Example 1 Everything was the same as in Example 1 except that calcium carbonate was used but mica was not used. Comparative Example 2 Everything was the same as in Example 1 except that mica was used but calcium carbonate was not used. Next, each molded plate of Examples and Comparative Examples
The test results and appearance according to ASTMD1003 are shown in the table below.
【表】
上の表からわかるように、実施例に比し比較例
のものはHaze％
（散乱光線透過率／全光線透過率×100）
がいずれも小さい。すなわち散乱光線透過率が全
光線透過率に比し小さいのですりガラス調の外観
を呈さず、やや白濁したものであつた。[Table] As can be seen from the table above, the Haze% (scattered light transmittance/total light transmittance x 100) of the comparative examples is smaller than that of the examples. That is, since the scattered light transmittance was smaller than the total light transmittance, it did not have a frosted glass appearance and was slightly cloudy.
Claims (1)
炭酸カルシウム0.5〜5.0重量部およびマイカ0.05
〜1.5重量部を均一に分散して成るすりガラス調
の外観を有する熱可塑性樹脂組成物。 ２ 硬質透明性の熱可塑性樹脂がポリスチレンで
ある特許請求の範囲第１項記載の熱可塑性樹脂組
成物。 ３ 炭酸カルシウムを1.0〜2.0重量部、マイカを
0.2〜0.4重量部混和した特許請求の範囲第１項記
載の熱可塑性樹脂組成物。[Claims] 1. For 100 parts by weight of hard transparent thermoplastic resin,
Calcium carbonate 0.5-5.0 parts by weight and mica 0.05
A thermoplastic resin composition having a frosted glass appearance, which is obtained by uniformly dispersing ~1.5 parts by weight. 2. The thermoplastic resin composition according to claim 1, wherein the hard transparent thermoplastic resin is polystyrene. 3 1.0 to 2.0 parts by weight of calcium carbonate and mica
The thermoplastic resin composition according to claim 1, in which 0.2 to 0.4 parts by weight are mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3791181A JPS57153047A (en) | 1981-03-18 | 1981-03-18 | Thermoplastic resin composition having ground glass-like appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3791181A JPS57153047A (en) | 1981-03-18 | 1981-03-18 | Thermoplastic resin composition having ground glass-like appearance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57153047A JPS57153047A (en) | 1982-09-21 |
| JPH0258297B2 true JPH0258297B2 (en) | 1990-12-07 |
Family
ID=12510723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3791181A Granted JPS57153047A (en) | 1981-03-18 | 1981-03-18 | Thermoplastic resin composition having ground glass-like appearance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57153047A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2891546B1 (en) * | 2005-10-04 | 2010-09-03 | Solvay | USE OF CALCIUM CARBONATE PARTICLES IN TRANSPARENT POLYMERIC COMPOSITIONS, TRANSPARENT POLYMERIC COMPOSITIONS AND PROCESS FOR THE PRODUCTION THEREOF |
| JP5147182B2 (en) * | 2006-01-20 | 2013-02-20 | 旭化成ケミカルズ株式会社 | Molded product of styrenic thermoplastic resin composition containing fine glass |
| CN104448650A (en) * | 2014-11-04 | 2015-03-25 | 张桂华 | Antistatic glass |
-
1981
- 1981-03-18 JP JP3791181A patent/JPS57153047A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57153047A (en) | 1982-09-21 |
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