JPH0853556A - Film for vacuum forming - Google Patents
Film for vacuum formingInfo
- Publication number
- JPH0853556A JPH0853556A JP6190520A JP19052094A JPH0853556A JP H0853556 A JPH0853556 A JP H0853556A JP 6190520 A JP6190520 A JP 6190520A JP 19052094 A JP19052094 A JP 19052094A JP H0853556 A JPH0853556 A JP H0853556A
- Authority
- JP
- Japan
- Prior art keywords
- polycarbonate resin
- film
- molecular weight
- vacuum forming
- weight
- 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
- 238000007666 vacuum forming Methods 0.000 title claims abstract description 25
- 229920005668 polycarbonate resin Polymers 0.000 claims abstract description 59
- 239000004431 polycarbonate resin Substances 0.000 claims abstract description 59
- 239000000203 mixture Substances 0.000 claims abstract description 8
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 10
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 abstract description 7
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 5
- 239000000155 melt Substances 0.000 abstract description 5
- 239000002243 precursor Substances 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract description 2
- 235000013305 food Nutrition 0.000 abstract description 2
- 229940106691 bisphenol a Drugs 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 13
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- -1 polypropylene Polymers 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229920005990 polystyrene resin Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- VEORPZCZECFIRK-UHFFFAOYSA-N 3,3',5,5'-tetrabromobisphenol A Chemical compound C=1C(Br)=C(O)C(Br)=CC=1C(C)(C)C1=CC(Br)=C(O)C(Br)=C1 VEORPZCZECFIRK-UHFFFAOYSA-N 0.000 description 1
- VWGKEVWFBOUAND-UHFFFAOYSA-N 4,4'-thiodiphenol Chemical compound C1=CC(O)=CC=C1SC1=CC=C(O)C=C1 VWGKEVWFBOUAND-UHFFFAOYSA-N 0.000 description 1
- ODJUOZPKKHIEOZ-UHFFFAOYSA-N 4-[2-(4-hydroxy-3,5-dimethylphenyl)propan-2-yl]-2,6-dimethylphenol Chemical compound CC1=C(O)C(C)=CC(C(C)(C)C=2C=C(C)C(O)=C(C)C=2)=C1 ODJUOZPKKHIEOZ-UHFFFAOYSA-N 0.000 description 1
- 235000010893 Bischofia javanica Nutrition 0.000 description 1
- 240000005220 Bischofia javanica Species 0.000 description 1
- SDDLEVPIDBLVHC-UHFFFAOYSA-N Bisphenol Z Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)CCCCC1 SDDLEVPIDBLVHC-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006085 branching agent Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は真空成形用フイルムに関
する。更に詳しくは、食品容器や玩具等を真空成形する
に適したポリカーボネート樹脂よりなる真空成形用フイ
ルムに関するものである。FIELD OF THE INVENTION The present invention relates to a vacuum forming film. More specifically, the present invention relates to a vacuum forming film made of a polycarbonate resin suitable for vacuum forming food containers, toys and the like.
【０００２】[0002]
【従来の技術】従来から真空成形用フイルムとしてはポ
リ塩化ビニル樹脂フイルム、ポリプロピレン樹脂フイル
ム、ポリスチレン樹脂フイルム等が広く用いられてい
る。しかしながら、最近はこれらのフイルムより機械物
性、耐熱性、透明性等に優れていることから、これらの
フイルムと共にポリカーボネート樹脂フイルムも真空成
形に用いられるようになった。2. Description of the Related Art Conventionally, polyvinyl chloride resin film, polypropylene resin film, polystyrene resin film and the like have been widely used as vacuum forming films. However, recently, since these films are superior in mechanical properties, heat resistance, transparency and the like, polycarbonate resin films have been used for vacuum forming together with these films.
【０００３】ポリカーボネート樹脂は、ポリ塩化ビニル
樹脂、ポリプロピレン樹脂、ポリスチレン樹脂等に比し
て融点が著しく高く且つドローダウンし易い。このた
め、ポリカーボネート樹脂フイルムを真空成形するに際
してはより高温に加熱して溶融軟化させなければなら
ず、更に成形のハイサイクル化に伴い遠赤外線やセラミ
ックヒーター等により５〜１０秒の短時間で１８０〜２
３０℃の高温に加熱する必要があり、ポリカーボネート
樹脂フイルムが大きくドローダウンして溶融軟化した樹
脂が金型に付着する問題がある。特に、ポリカーボネー
ト樹脂フイルムの厚みが１mm以下と薄くなるに従ってよ
り金型に付着し易くなる。金型とフイルムの距離を、ド
ローダウンする長さよりも長くすれば金型に付着する問
題は解決するが、金型とフイルムの距離は真空度を一定
にするために通常固定されている。更に、成形サイクル
を縮めるため金型と熱源の距離は益々短くなる傾向にあ
る。以上の理由から、ポリカーボネート樹脂フイルム
は、ポリ塩化ビニル樹脂、ポリプロピレン樹脂、ポリス
チレン樹脂等のフイルムに比して真空成形し難く、ポリ
カーボネート樹脂の優れた特性を維持し且つ真空成形に
適したポリカーボネート樹脂フイルムの出現が強く望ま
れている。Polycarbonate resin has a remarkably high melting point and is easy to draw down as compared with polyvinyl chloride resin, polypropylene resin, polystyrene resin and the like. For this reason, when vacuum-molding a polycarbonate resin film, it must be heated to a higher temperature to be melted and softened. Further, with a high cycle of molding, far infrared rays, a ceramic heater, or the like can be used for a short time of 5 to 10 seconds. ~ 2
Since it is necessary to heat to a high temperature of 30 ° C., there is a problem that the polycarbonate resin film is largely drawn down and the melted and softened resin adheres to the mold. Particularly, as the thickness of the polycarbonate resin film is reduced to 1 mm or less, it becomes easier to adhere to the mold. If the distance between the mold and the film is longer than the drawdown length, the problem of sticking to the mold can be solved, but the distance between the mold and the film is usually fixed in order to keep the degree of vacuum constant. Further, the distance between the mold and the heat source tends to become shorter and shorter in order to shorten the molding cycle. For the above reasons, the polycarbonate resin film is more difficult to vacuum-form than films of polyvinyl chloride resin, polypropylene resin, polystyrene resin, etc., and maintains the excellent properties of the polycarbonate resin and is suitable for vacuum forming. The appearance of is strongly desired.
【０００４】一方、ポリカーボネート樹脂のドローダウ
ン性を改善するために、通常の溶融成形に供し難い超高
分子量のポリカーボネート樹脂を配合することが知られ
ている。しかしながら、ポリカーボネート樹脂は、その
溶融粘度が高いため、ポリカーボネート樹脂に上記超高
分子量ポリカーボネート樹脂を配合すると、溶融粘度が
更に高くなり、フイルムへの成形が困難になる。On the other hand, in order to improve the drawdown property of the polycarbonate resin, it is known to blend an ultrahigh molecular weight polycarbonate resin which is difficult to be subjected to usual melt molding. However, since the polycarbonate resin has a high melt viscosity, when the above-mentioned ultra-high molecular weight polycarbonate resin is blended with the polycarbonate resin, the melt viscosity becomes higher and it becomes difficult to form the film into a film.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、ドロ
ーダウンし難く、真空成形するに適したポリカーボネー
ト樹脂よりなる真空成形用フイルムを提供することであ
る。本発明者は、上記超高分子量ポリカーボネート樹脂
に着目して鋭意検討した結果、超高分子量ポリカーボネ
ート樹脂のなかでも特に分子量の高い超高分子量ポリカ
ーボネート樹脂を用いれば、ポリカーボネート樹脂のフ
イルムへの成形が容易で且つ得られたフイルムは真空成
形するに適するまでにそのドローダウン性が改善されて
いることを究明し、本発明を完成した。SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum forming film made of a polycarbonate resin which is difficult to draw down and is suitable for vacuum forming. The present inventor has conducted intensive studies focusing on the above ultrahigh molecular weight polycarbonate resin, and if an ultrahigh molecular weight polycarbonate resin having a particularly high molecular weight is used among the ultrahigh molecular weight polycarbonate resins, it is easy to form the polycarbonate resin into a film. The present invention has been completed by discovering that the drawdown property of the obtained film is improved by the time it is suitable for vacuum forming.
【０００６】[0006]
【課題を解決するための手段】本発明は、重量平均分子
量が１３０００〜４５０００のポリカーボネート樹脂９
０〜９９重量％及び重量平均分子量が１７５０００〜３
０００００の超高分子量のポリカーボネート樹脂１〜１
０重量％からなり、ノズル径１mmφ×１０mm、荷重１６
０kg／cm2 、２８０℃で測定した流れ値（Ｑ値）が５〜
３０×１０-3ml／s であるポリカーボネート樹脂混合物
を押出成形してなる厚さが０．１〜１mmの真空成形用フ
イルムに係るものである。The present invention provides a polycarbonate resin 9 having a weight average molecular weight of 13,000 to 45,000.
0-99 wt% and weight average molecular weight 175,000-3
00000 ultra high molecular weight polycarbonate resin 1-1
0% by weight, nozzle diameter 1mmφ × 10mm, load 16
The flow value (Q value) measured at 0 kg / cm 2 and 280 ° C. is 5 to 5.
The present invention relates to a vacuum forming film having a thickness of 0.1 to 1 mm formed by extruding a polycarbonate resin mixture of 30 × 10 −3 ml / s.
【０００７】本発明でいうポリカーボネート樹脂は二価
フェノールとカーボネート前駆体を溶液法又は溶融法で
反応させて得られる。ここで使用する二価フェノールと
しては２，２−ビス（４−ヒドロキシフェニル）プロパ
ン（通称ビスフェノールＡ）を対象とするが、その一部
又は全部を他の二価フェノールで置換してもよい。他の
二価フェノールとしては例えば１，１−ビス（４−ヒド
ロキシフェニル）シクロヘキサン、２，２−ビス（４−
ヒドロキシ−３，５−ジメチルフェニル）プロパン、
２，２−ビス（４−ヒドロキシ−３，５−ジブロモフェ
ニル）プロパン、２，２−ビス（４−ヒドロキシ−３−
メチルフェニル）プロパン、ビス（４−ヒドロキシフェ
ニル）サルファイド、ビス（４−ヒドロキシフェニル）
スルホン等があげられる。カーボネート前駆体としては
例えばカルボニルハライド、カーボネートエステル、ハ
ロホルメート等があげられ、具体的にはホスゲン、ジフ
ェニルカーボネート、二価フェノールのジハロホルメー
ト等があげられる。かかる二価フェノールとカーボネー
ト前駆体からポリカーボネート樹脂を製造するに際して
は適当な分子量調節剤、加工性改善のための分岐剤、反
応を促進するための触媒を使用してもよく、また必要に
応じて例えば着色剤、紫外線吸収剤、帯電防止剤、滑
剤、光安定剤、熱安定剤等の添加剤を配合してもよい。The polycarbonate resin referred to in the present invention is obtained by reacting a dihydric phenol and a carbonate precursor by a solution method or a melting method. The dihydric phenol used here is 2,2-bis (4-hydroxyphenyl) propane (commonly called bisphenol A), but part or all of it may be replaced with another dihydric phenol. Other dihydric phenols include, for example, 1,1-bis (4-hydroxyphenyl) cyclohexane and 2,2-bis (4-
Hydroxy-3,5-dimethylphenyl) propane,
2,2-bis (4-hydroxy-3,5-dibromophenyl) propane, 2,2-bis (4-hydroxy-3-)
Methylphenyl) propane, bis (4-hydroxyphenyl) sulfide, bis (4-hydroxyphenyl)
Examples include sulfone. Examples of the carbonate precursor include carbonyl halide, carbonate ester, haloformate and the like, and specific examples include phosgene, diphenyl carbonate, dihaloformate of dihydric phenol and the like. In producing a polycarbonate resin from such a dihydric phenol and a carbonate precursor, a suitable molecular weight modifier, a branching agent for improving processability, and a catalyst for accelerating the reaction may be used, and if necessary, For example, an additive such as a colorant, an ultraviolet absorber, an antistatic agent, a lubricant, a light stabilizer and a heat stabilizer may be added.
【０００８】本発明の真空成形用フイルムの主たる成分
となるポリカーボネート樹脂の分子量は、重量平均分子
量で表して１３０００〜４５０００、好ましくは１８０
００〜４００００の範囲である。重量平均分子量が１３
０００に達しないポリカーボネート樹脂では、１〜６量
体の低分子量ポリカーボネートが多いためドローダウン
性を制御し難く、重量平均分子量が４５０００より高い
ポリカーボネート樹脂では、所定の流れ値（Ｑ値）に調
整し難い。The molecular weight of the polycarbonate resin, which is the main component of the vacuum forming film of the present invention, is 13,000 to 45,000, preferably 180, in terms of weight average molecular weight.
The range is from 00 to 40,000. Weight average molecular weight is 13
In the polycarbonate resin which does not reach 000, it is difficult to control the drawdown property because there are many low molecular weight polycarbonates of 1 to 6 mer, and in the polycarbonate resin having a weight average molecular weight higher than 45000, it is adjusted to a predetermined flow value (Q value). hard.
【０００９】上記ポリカーボネート樹脂に配合する超高
分子量ポリカーボネート樹脂の分子量は、重量平均分子
量で表して１７５０００〜３０００００、好ましくは１
８００００〜２５００００であり、通常溶液法により製
造される。重量平均分子量が１７５０００に達しないポ
リカーボネート樹脂を用いたのでは、得られるフイルム
のドローダウン性を真空成形するに適するまでに改善す
る量配合すると、フイルムへの成形が困難になり、目的
とするドローダウン性が改善され、真空成形するに適し
たポリカーボネート樹脂よりなる真空成形用フイルムは
得られない。重量平均分子量が３０００００より高いポ
リカーボネート樹脂は溶液法によっても製造し難い。な
お、本発明でいう重量平均分子量は光拡散法によって測
定する。The molecular weight of the ultrahigh molecular weight polycarbonate resin to be blended with the above polycarbonate resin is represented by a weight average molecular weight of 175,000 to 300,000, preferably 1
It is 80,000 to 250,000 and is usually produced by a solution method. If a polycarbonate resin having a weight average molecular weight of less than 175,000 is used, if it is blended in such an amount that the drawdown properties of the obtained film are improved to a level suitable for vacuum forming, it becomes difficult to form the film into the desired draw. A vacuum forming film made of a polycarbonate resin which has improved down performance and is suitable for vacuum forming cannot be obtained. It is difficult to produce a polycarbonate resin having a weight average molecular weight higher than 300,000 even by a solution method. The weight average molecular weight referred to in the present invention is measured by a light diffusion method.
【００１０】上記超高分子量ポリカーボネート樹脂の最
適の配合量は、配合されるポリカーボネート樹脂の分子
量や要求される真空成形性によって異なり、配合される
ポリカーボネート樹脂と超高分子量ポリカーボネート樹
脂との合計重量中１〜１０重量％になる範囲から選択さ
れ、且つ得られる樹脂混合物をノズル径１mmφ×１０m
m、荷重１６０kg／cm2 、２８０℃で測定した流れ値
（Ｑ値）が５〜３０×１０ -3ml／s になる量である。こ
の配合量が１重量％に達しない量では、流れ値（Ｑ値）
が所定の値であってもドローダウン性が改善し難く、１
０重量％より多くなると、ドローダウン性改善効果が飽
和するばかりでなく、溶融粘度が高くなってフイルムへ
の成形が困難になる。また、流れ値（Ｑ値）が５×１０
-3ml／s 未満では、得られるフィルムの真空成形におけ
る溶融加熱時のドローダウン性があまりにも小さくなり
過ぎることにより、真空成形して得られる成形品の厚み
斑が大きくなり、商品価値のある成形品が得られ難い。
流れ値（Ｑ値）が３０×１０-3ml／s より大きいと、得
られるフィルムの真空成形における溶融加熱時のドロー
ダウン性が大きすぎて金型付着等が生じて成形不良が発
生する。ポリカーボネート樹脂に超高分子量ポリカーボ
ネート樹脂を配合するには任意の方法が採用されるが、
ポリカーボネート樹脂の有機溶媒溶液と超高分子量ポリ
カーボネート樹脂の有機溶媒溶液を混合した後、常法に
よって粉粒化させるのが好ましい。The above-mentioned ultra high molecular weight polycarbonate resin
The appropriate amount is the molecular weight of the polycarbonate resin
It is mixed depending on the amount and required vacuum formability.
Polycarbonate resin and ultra high molecular weight polycarbonate resin
Selected from the range of 1 to 10% by weight in the total weight of fat.
And the resulting resin mixture is nozzle diameter 1mmφ × 10m
m, load 160kg / cm2Flow value measured at 280 ° C
(Q value) is 5 to 30 x 10 -3The amount is ml / s. This
Flow rate (Q value)
It is difficult to improve drawdown even if is a predetermined value.
If it is more than 0% by weight, the effect of improving the drawdown property becomes tired.
Not only the softening, but also the melt viscosity becomes higher and the film
Molding becomes difficult. Also, the flow value (Q value) is 5 × 10
-3If it is less than ml / s, it will not be possible to vacuum form the obtained film.
Drawdown during melting and heating becomes too small
The thickness of the molded product obtained by vacuum forming
It is difficult to obtain molded products with commercial value because the spots become large.
Flow value (Q value) is 30 × 10-3Greater than ml / s
During melt heating in vacuum forming of film to be heated
The downing property is too large, causing mold adhesion and other molding defects.
To live. Ultra high molecular weight polycarbonate on polycarbonate resin
Any method is used to mix the nate resin,
Organic solvent solutions of polycarbonate resin and ultra high molecular weight poly
After mixing the organic solvent solution of carbonate resin,
Therefore, it is preferable to granulate.
【００１１】本発明の真空成形用フイルムの厚さは、あ
まりに薄いとフィルムの真空成形における溶融加熱時の
ドローダウン性が大きすぎて金型付着等が生じ易く、あ
まりに厚いと真空成形における溶融軟化時に気泡が発生
したり、金型どおりの成形品が得られ難くなるので０．
１〜１mmの範囲にすべきである。かかる厚さのポリカー
ボネート樹脂フイルムを製造するには、任意の方法が採
用されるが、通常Ｔダイを用いる溶融押出法によって容
易に製造される。If the thickness of the vacuum forming film of the present invention is too thin, the drawdown property during melt heating in vacuum forming of the film is too great, and die adhesion or the like is likely to occur, and if it is too thick, melt softening in vacuum forming is performed. At times, air bubbles are generated, and it becomes difficult to obtain a molded product that is exactly the same as the mold.
It should be in the range of 1-1 mm. Any method may be adopted for producing a polycarbonate resin film having such a thickness, but it is usually easily produced by a melt extrusion method using a T die.
【００１２】なお、本発明のフイルムを用いて真空成形
するに当たっては、格別の成形条件を採用する必要はな
く、任意の方法及び条件が採用される。また、本発明の
ポリカーボネート樹脂フイルムは、その表面にポリエチ
レン系やポリプロピレン系等の保護フィルムを貼付した
ままで真空成形してもよい。In vacuum forming using the film of the present invention, it is not necessary to adopt special forming conditions, and arbitrary methods and conditions can be adopted. Further, the polycarbonate resin film of the present invention may be vacuum-formed with the surface thereof having a protective film of polyethylene or polypropylene on it.
【００１３】[0013]
【実施例】以下に実施例をあげて本発明を更に説明す
る。なお、実施例中の％は重量％であり、流れ値、ドロ
ーダウン性、成形品の外観は下記の方法で評価した。 （１）流れ値（Ｑ値ml／s ）：JIS K ６７１９に準拠し
て高化式フローテスター［島津製作所（株）製］のシリ
ンダーにポリカーボネート樹脂を入れ、温度２８０℃、
ノズル径１mmφ×１０mm、荷重１６０kg／cm2 で測定し
た。 （２）ドローダウン性：ポリカーボネート樹脂フイルム
を幅２００mm、長さ５００mmにカットし、長さ方向の両
端部をＵ字型治具に固定し、１９０℃の強制循環熱風加
熱槽［タバイエスペック（株）製 PS-２４２型］に５０
秒間放置してフイルムが垂れ下がる距離の最大値（mm）
を表示した。 （３）成形品の外観：セラミックヒーター使用の真空成
形機［成光産業（株）製Formech ４５０型］を用い、セ
ラミックヒーター温度３３０℃、ポリカーボネート樹脂
フイルム加熱時間５０秒、金型押し当て時間３秒で巾８
０mm、長さ１３０mm、深さ３０mmで底面に深さ３mm、巾
５mmの溝を略２０mm間隔で格子状に設けたトレー用金型
により真空成形し、得られた成形品の外観を評価した。
評価は金型どおりで外観が良好なものを○、金型付着に
よる溝くずれ、気泡や偏肉の発生等外観が不良なものを
×で示した。EXAMPLES The present invention will be further described with reference to the following examples. In addition,% in the examples is% by weight, and the flow value, drawdown property, and appearance of the molded product were evaluated by the following methods. (1) Flow value (Q value ml / s): Polycarbonate resin was put into the cylinder of a Koka type flow tester [Shimadzu Corporation] according to JIS K 6719, and the temperature was 280 ° C.
The measurement was performed with a nozzle diameter of 1 mmφ × 10 mm and a load of 160 kg / cm 2 . (2) Drawdown property: Polycarbonate resin film was cut into a width of 200 mm and a length of 500 mm, both ends of the length direction were fixed to U-shaped jigs, and a forced circulation hot air heating tank at 190 ° C [Tabay Espec (stock) ) PS-242]] 50
Maximum value for the film to hang down after being left for 2 seconds (mm)
Was displayed. (3) Appearance of molded product: Using a vacuum molding machine using Ceramic heater [Formech 450 type manufactured by Nariko Sangyo Co., Ltd.], ceramic heater temperature 330 ° C., polycarbonate resin film heating time 50 seconds, mold pressing time 3 Width 8 in seconds
Vacuum molding was performed using a die for a tray in which grooves having a length of 0 mm, a length of 130 mm, a depth of 30 mm, a depth of 3 mm, and a width of 5 mm were provided at intervals of approximately 20 mm in a grid pattern, and the appearance of the obtained molded product was evaluated.
In the evaluation, those having the same appearance as the mold and having a good appearance are indicated by ◯, and those having a poor appearance such as the formation of grooves due to the attachment of the mold, the occurrence of bubbles or uneven thickness are indicated by x.
【００１４】［実施例１〜３及び比較例１、２］ビスフ
ェノールＡとホスゲンから常法によって得た重量平均分
子量２９７００のポリカーボネート樹脂に、ビスフェノ
ールＡとホスゲンから常法によって得た重量平均分子量
２１２０００の超高分子量ポリカーボネート樹脂を２％
になる量混合してＱ値が１８×１０-3ml／s のポリカー
ボネート樹脂混合物を作成した。この樹脂混合物を押出
機によりシリンダー温度２９０℃、Ｔダイ温度２８０
℃、吐出量１００〜２００kg／時でフィルム状に押出
し、鏡面冷却ロールにより冷却した後引取ロールにより
引取って幅１０００mmで表１記載の厚さのフイルムを得
た。これらのフイルムのドローダウン性を表１に示し
た。次いでこれらのフイルムを用いて真空成形し、得ら
れた成形品の外観を評価し、評価結果を表１に示した。[Examples 1 to 3 and Comparative Examples 1 and 2] Polycarbonate resins having a weight average molecular weight of 29,700 obtained from bisphenol A and phosgene by a conventional method were added to polycarbonate resins having a weight average molecular weight of 212,000 obtained from bisphenol A and phosgene by a conventional method. 2% ultra high molecular weight polycarbonate resin
To produce a polycarbonate resin mixture having a Q value of 18 × 10 −3 ml / s. This resin mixture was heated by an extruder at a cylinder temperature of 290 ° C. and a T-die temperature of 280.
A film having a width of 1000 mm and a thickness shown in Table 1 was obtained by extruding into a film form at a temperature of 100 ° C. and a discharge rate of 100 to 200 kg / hour, cooling with a mirror cooling roll, and then withdrawing with a take-up roll. Table 1 shows the drawdown properties of these films. Then, vacuum molding was performed using these films, the appearance of the obtained molded product was evaluated, and the evaluation results are shown in Table 1.
【００１５】[0015]
【表１】 [Table 1]
【００１６】［実施例４］重量平均分子量２１２０００
の超高分子量ポリカーボネート樹脂の混合量を６％に変
更する以外は実施例２と同様にしてＱ値が９．５×１０
-3ml／s のポリカーボネート樹脂混合物を作成し、この
樹脂混合物を用いて実施例２と同様にして厚さ０．５mm
のフイルムを得た。このフイルムのドローダウン性は１
８mmであった。次いでこのフイルムを用いて真空成形
し、得られた成形品の外観の評価結果は○であった。Example 4 Weight average molecular weight 212000
The Q value was 9.5 × 10 in the same manner as in Example 2 except that the mixing amount of the ultra high molecular weight polycarbonate resin in Example 2 was changed to 6%.
A polycarbonate resin mixture of -3 ml / s was prepared, and using this resin mixture, a thickness of 0.5 mm was obtained in the same manner as in Example 2.
I got a film. The drawdown of this film is 1
It was 8 mm. Then, vacuum molding was performed using this film, and the appearance evaluation result of the obtained molded product was ◯.
【００１７】［比較例３］ビスフェノールＡとホスゲン
から常法によって得た重量平均分子量が２４０００、Ｑ
値が６０×１０-3ml／s のポリカーボネート樹脂を用い
て実施例２と同様にして厚さ０．５mmのフイルムを得
た。このフイルムのドローダウン性は８７mmであった。
次いでこのフイルムを用いて真空成形したところ、得ら
れた成形品には金型付着による溝くずれが発生し、外観
の評価結果は×であった。[Comparative Example 3] A weight average molecular weight obtained from bisphenol A and phosgene by a conventional method was 24,000, and Q
A film having a thickness of 0.5 mm was obtained in the same manner as in Example 2 using a polycarbonate resin having a value of 60 × 10 −3 ml / s. The drawdown property of this film was 87 mm.
Next, when vacuum molding was performed using this film, the resulting molded product had a groove dislocation due to attachment of a mold, and the appearance evaluation result was x.
【００１８】［比較例４］ビスフェノールＡとホスゲン
から常法によって得た重量平均分子量が２９７００、Ｑ
値が１７×１０-3ml／s のポリカーボネート樹脂を用い
て実施例２と同様にして厚さ０．５mmのフイルムを得
た。このフイルムのドローダウン性は６８mmであった。
次いでこのフイルムを用いて真空成形したところ、得ら
れた成形品には偏肉が発生し、外観の評価結果は×であ
った。[Comparative Example 4] A weight average molecular weight obtained from bisphenol A and phosgene by a conventional method was 29,700, Q.
A film having a thickness of 0.5 mm was obtained in the same manner as in Example 2 using a polycarbonate resin having a value of 17 × 10 −3 ml / s. The drawdown property of this film was 68 mm.
Then, when vacuum molding was performed using this film, uneven thickness was generated in the obtained molded product, and the appearance evaluation result was x.
【００１９】［比較例５］ビスフェノールＡとホスゲン
から常法によって得た重量平均分子量が４９０００、Ｑ
値が３．７×１０-3ml／s のポリカーボネート樹脂を用
いて実施例２と同様にして厚さ０．５mmのフイルムを得
た。このフイルムのドローダウン性は１１mmであった。
次いでこのフイルムを用いて真空成形したところ、得ら
れた成形品には偏肉が発生し、外観の評価結果は×であ
った。[Comparative Example 5] A weight average molecular weight obtained from bisphenol A and phosgene by a conventional method was 49000, and Q was Q.
A film having a thickness of 0.5 mm was obtained in the same manner as in Example 2 using a polycarbonate resin having a value of 3.7 × 10 −3 ml / s. The drawdown property of this film was 11 mm.
Then, when vacuum molding was performed using this film, uneven thickness was generated in the obtained molded product, and the appearance evaluation result was x.
【００２０】[0020]
【発明の効果】本発明によれば、ドローダウンし難く、
真空成形するに適したポリカーボネート樹脂よりなる真
空成形用フイルムを提供することが可能になり、その奏
する効果は格別なものである。According to the present invention, it is difficult to draw down,
It becomes possible to provide a film for vacuum forming, which is made of a polycarbonate resin suitable for vacuum forming, and the effect produced by the film is remarkable.
Claims (1)
０のポリカーボネート樹脂９０〜９９重量％及び重量平
均分子量が１７５０００〜３０００００の超高分子量の
ポリカーボネート樹脂１〜１０重量％からなり、ノズル
径１mmφ×１０mm、荷重１６０kg／cm2 、２８０℃で測
定した流れ値（Ｑ値）が５〜３０×１０-3ml／s である
ポリカーボネート樹脂混合物を押出成形してなる厚さが
０．１〜１mmの真空成形用フイルム。1. A weight average molecular weight of 13,000 to 4500.
0 to 90% by weight polycarbonate resin and 1 to 10% by weight ultrahigh molecular weight polycarbonate resin having a weight average molecular weight of 175,000 to 300,000, nozzle diameter 1 mmφ × 10 mm, load 160 kg / cm 2 , flow measured at 280 ° C. A film for vacuum forming having a thickness of 0.1 to 1 mm, which is obtained by extruding a polycarbonate resin mixture having a value (Q value) of 5 to 30 × 10 −3 ml / s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6190520A JPH0853556A (en) | 1994-08-12 | 1994-08-12 | Film for vacuum forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6190520A JPH0853556A (en) | 1994-08-12 | 1994-08-12 | Film for vacuum forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0853556A true JPH0853556A (en) | 1996-02-27 |
Family
ID=16259464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6190520A Pending JPH0853556A (en) | 1994-08-12 | 1994-08-12 | Film for vacuum forming |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0853556A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001139705A (en) * | 1999-11-18 | 2001-05-22 | Teijin Chem Ltd | Polycarbonate resin film for insert molding excellent in dimensional stability |
| JP2004345344A (en) * | 2003-04-28 | 2004-12-09 | Teijin Chem Ltd | Antistatic sheet product |
| WO2020209211A1 (en) * | 2019-04-08 | 2020-10-15 | 三菱瓦斯化学株式会社 | Film, laminate, thermoformed body, in-mold molding, method for producing molding, and method for producing in-mold molding |
-
1994
- 1994-08-12 JP JP6190520A patent/JPH0853556A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001139705A (en) * | 1999-11-18 | 2001-05-22 | Teijin Chem Ltd | Polycarbonate resin film for insert molding excellent in dimensional stability |
| JP2004345344A (en) * | 2003-04-28 | 2004-12-09 | Teijin Chem Ltd | Antistatic sheet product |
| WO2020209211A1 (en) * | 2019-04-08 | 2020-10-15 | 三菱瓦斯化学株式会社 | Film, laminate, thermoformed body, in-mold molding, method for producing molding, and method for producing in-mold molding |
| JP6813721B1 (en) * | 2019-04-08 | 2021-01-13 | 三菱瓦斯化学株式会社 | Film, multilayer body, thermoformed body, in-mold molded body, manufacturing method of molded body and manufacturing method of in-mold molded body |
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