JPH0356169B2 - - Google Patents
Info
- Publication number
- JPH0356169B2 JPH0356169B2 JP1684782A JP1684782A JPH0356169B2 JP H0356169 B2 JPH0356169 B2 JP H0356169B2 JP 1684782 A JP1684782 A JP 1684782A JP 1684782 A JP1684782 A JP 1684782A JP H0356169 B2 JPH0356169 B2 JP H0356169B2
- Authority
- JP
- Japan
- Prior art keywords
- stretching
- polypropylene
- weight
- parts
- present
- 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
- -1 polypropylene Polymers 0.000 claims description 20
- 239000004743 Polypropylene Substances 0.000 claims description 12
- 229920001155 polypropylene Polymers 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920001384 propylene homopolymer Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 description 1
- SLZWSYPJQQIDJB-UHFFFAOYSA-N n-[6-(octadecanoylamino)hexyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCCCCCNC(=O)CCCCCCCCCCCCCCCCC SLZWSYPJQQIDJB-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は透視感の優れたポリプロピレン延伸フ
イルムに関する。
ポリプロピレン延伸フイルム、特に二軸延伸フ
イルムは透明性、光沢等の光学的性質、引張強
度、剛性度等の機械的性質、防湿性等が比較的良
好であるがゆえに食品包装、繊維包装その他広範
囲な用途に使用されている。
しかしながら用途によつてはこれらの性質が十
分満足されている訳ではなく、中でも透視感の要
求される用途ではポリプロピレン延伸フイルムに
特有の光学的ムラが問題となり、使用分野が大幅
に制限されているのが実情である。
本発明者らはかかる実情にかんがみ種々検討し
た結果、ポリプロピレンに特定のビスアマイド化
合物を添加してなる配合物を延伸することにより
上記の如き光学的ムラのない透視感の優れた延伸
フイルムが得られることを見い出し、本発明に到
達した。
すなわちポリプロピレン樹脂100重量部に対し
て、一般式
RCONH（CH2）nNHCOR
（ここでＲは炭素数11〜21の脂肪族炭化水素基、
ｎは１〜10の整数を表わす。）
で表わされるビスアマイド化合物を0.5〜５重量
部添加してなる配合物を少なくとも一軸方向に延
伸してなる透視感の優れたポリプロピレン延伸フ
イルムである。
本発明におけるポリプロピレンとはプロピレン
を主体とする結晶性重合体であり、結晶性プロピ
レン単独重合体または結晶性プロピレン−αオレ
フイン多元重合体、例えばエチレン−プロピレン
共重合体、プロピレン−ブテン−１共重合体、エ
チレン−プロピレン−ブテン−１共重合体など、
及びこれらの混合物を包含する。
本発明におけるビスアマイド化合物の例として
はメチレンビスステアロアマイド、エチレンビス
ステアロアマイド、ヘキサメチレンビスステアロ
アマイド等が挙げられる。
ビスアマイド化合物のメチレン数ｎが10を越え
ると相溶性、発煙、臭気の点で問題が生じるので
使用できない。
ビスアマイド化合物の添加量は0.5〜５重量部、
好ましくは1.0〜3.0重量部である。
本発明に使用するポリプロピレンには種々の添
加剤、例えば酸化防止剤、滑剤、帯電防止剤、抗
ブロツキング剤等を適宜配合することができる。
本発明における延伸フイルムは通常工業的に用
いられる方法、例えばロール延伸、テンター延
伸、チユーブラー延伸等の延伸方法にて少なくと
も一軸方向に延伸することにより得ることができ
る。
本発明におけるビスアマイド化合物は通常滑剤
として用いられているが、驚くべきことにはポリ
プロピレンに滑剤としての添加量より高い添加量
を配合し、延伸することにより著るしく透視感の
優れたポリプロピレン延伸フイルムが得られるの
である。
以下に実施例を挙げて本発明の効果を説明する
が、本発明はこれらに限定されるものではない。
実施例１，２及び比較例１，２
メルトインデツクス2.0g／10分の結晶性プロピ
レン単独重合体100重量部に対して、ビスアマイ
ド化合物としてエチレンビスステアロアマイドを
所定量添加混合し、造粒機によりペレツト化した
後、樹脂温度280℃で溶融押出を行ない、80℃の
冷却ロールにて急冷することにより厚さ0.8mmの
シートとした。得られたシートをテンター式逐次
二軸延伸装置にて縦方向に延伸温度140℃で４倍
延伸を行ない、引つづいて横方向に延伸温度155
℃で10倍延伸を行ない、140℃で熱処理を行なう
ことにより厚さ約20μの二軸延伸フイルムを得
た。
以上の実施例１，２及び比較例１，２における
フイルム物性を第１表に示した。
なお実施例におけるフイルムの透視感判定は
LS値（狭角拡散透過値）を用い、測定は東洋精
機製作所製視覚透明度試験機にて実施した。
The present invention relates to a polypropylene stretched film with excellent transparency. Polypropylene stretched film, especially biaxially stretched film, has relatively good optical properties such as transparency and gloss, mechanical properties such as tensile strength and rigidity, and moisture resistance, so it is used in a wide range of applications such as food packaging, textile packaging, etc. used for a purpose. However, these properties are not fully satisfied depending on the application, and in particular, in applications that require transparency, the optical unevenness peculiar to polypropylene stretched films poses a problem, greatly limiting the field of use. That is the reality. The inventors of the present invention have conducted various studies in view of the above circumstances, and have found that by stretching a composition made by adding a specific bisamide compound to polypropylene, a stretched film with excellent transparency without optical unevenness as described above can be obtained. They discovered this and arrived at the present invention. That is, with respect to 100 parts by weight of polypropylene resin, the general formula RCONH (CH 2 ) nNHCOR (where R is an aliphatic hydrocarbon group having 11 to 21 carbon atoms,
n represents an integer from 1 to 10. ) A polypropylene stretched film with excellent transparency is obtained by stretching in at least one direction a blend obtained by adding 0.5 to 5 parts by weight of a bisamide compound represented by the following formula. Polypropylene in the present invention is a crystalline polymer mainly composed of propylene, such as a crystalline propylene homopolymer or a crystalline propylene-α-olefin multipolymer, such as an ethylene-propylene copolymer, a propylene-butene-1 copolymer, etc. ethylene-propylene-butene-1 copolymer, etc.
and mixtures thereof. Examples of the bisamide compound in the present invention include methylene bis stearamide, ethylene bis stearamide, hexamethylene bis stearamide, and the like. If the methylene number n of the bisamide compound exceeds 10, problems will occur in terms of compatibility, smoke generation, and odor, so it cannot be used. The amount of bisamide compound added is 0.5 to 5 parts by weight,
Preferably it is 1.0 to 3.0 parts by weight. Various additives such as antioxidants, lubricants, antistatic agents, antiblocking agents, etc. can be appropriately added to the polypropylene used in the present invention. The stretched film in the present invention can be obtained by stretching in at least one direction by a method commonly used in industry, such as roll stretching, tenter stretching, or tubular stretching. The bisamide compound in the present invention is usually used as a lubricant, but surprisingly, by blending polypropylene in an amount higher than the amount added as a lubricant and stretching it, a polypropylene stretched film with significantly excellent transparency can be obtained. is obtained. The effects of the present invention will be explained below with reference to Examples, but the present invention is not limited thereto. Examples 1 and 2 and Comparative Examples 1 and 2 To 100 parts by weight of a crystalline propylene homopolymer with a melt index of 2.0 g/10 minutes, a predetermined amount of ethylene bisstearoamide as a bisamide compound was added and mixed, and the mixture was granulated. After pelletizing with a machine, melt extrusion was performed at a resin temperature of 280°C, and the mixture was rapidly cooled with a cooling roll at 80°C to form a sheet with a thickness of 0.8 mm. The obtained sheet was stretched 4 times in the longitudinal direction at a stretching temperature of 140°C using a tenter-type sequential biaxial stretching device, and then in the transverse direction at a stretching temperature of 155°C.
A biaxially stretched film with a thickness of about 20 μm was obtained by stretching 10 times at ℃ and heat-treating at 140 ℃. Table 1 shows the physical properties of the films in Examples 1 and 2 and Comparative Examples 1 and 2 above. In addition, the perspective judgment of the film in the example is
The measurement was carried out using a visual transparency tester manufactured by Toyo Seiki Seisakusho using the LS value (narrow angle diffuse transmission value).
【表】
第１表に示す如く、本発明による実施例では比
較例に較べ著るしく透視感の良好な延伸フイルム
が得られていることがわかる。[Table] As shown in Table 1, it can be seen that in the examples according to the present invention, stretched films with significantly better transparency than the comparative examples were obtained.
Claims (1)
ｎは１〜10の整数を表わす。） で表わされるビスアマイド化合物を1.0〜3.0重量
部添加してなる配合物を少なくとも一軸方向に延
伸してなる透視感の優れたポリプロピレン延伸フ
イルム。[Claims] 1. For 100 parts by weight of polypropylene resin, the general formula RCONH(CH 2 )nNHCOR (where R is an aliphatic hydrocarbon group having 11 to 21 carbon atoms,
n represents an integer from 1 to 10. 1. A polypropylene stretched film with excellent transparency obtained by stretching in at least one axis direction a blend obtained by adding 1.0 to 3.0 parts by weight of a bisamide compound represented by the following formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1684782A JPS58134711A (en) | 1982-02-03 | 1982-02-03 | Polypropylene drawn film with superior transparent feeling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1684782A JPS58134711A (en) | 1982-02-03 | 1982-02-03 | Polypropylene drawn film with superior transparent feeling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58134711A JPS58134711A (en) | 1983-08-11 |
| JPH0356169B2 true JPH0356169B2 (en) | 1991-08-27 |
Family
ID=11927598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1684782A Granted JPS58134711A (en) | 1982-02-03 | 1982-02-03 | Polypropylene drawn film with superior transparent feeling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58134711A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3434298A1 (en) * | 1984-09-19 | 1986-03-27 | Hoechst Ag, 6230 Frankfurt | TRANSFER METALIZING FILM |
-
1982
- 1982-02-03 JP JP1684782A patent/JPS58134711A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58134711A (en) | 1983-08-11 |
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