JPS5879042A - Polyolefin film - Google Patents

Abstract

PURPOSE:A durable film not whitening, having improved color tone and antistatic properties, comprising a glycerol derivative, a hydroxyethyl group- containing amine compund, and an organic phosphite compound. CONSTITUTION:A film obtained by blenindng (A) a glycerol derivative shown by the formulaI(R1 is 8-22c alkyl, alkenyl, or acyl) with (B) a hydroxyethyl group-containing amine compound shown by the formula II (R2 is 8-22C alkyl or alkenyl; n is 0 or integer of 1-10; m is integer of 1-10) and (C) an organic phosphite compound shown by the formula III (R3 and R4 are H, aliphatic hydrocarbon, or aromatic hydrocarbon) in a weight ratio of the component A to B of (7:3)-(5:5). The amount of the component C is 0.5-10pts.wt. based on 100pts.wt. components A+B, and the amounts of the components A+B+C are 0.01-5pts.wt. based on 100pts.wt. resin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antistatic polyolefin film, and more particularly to a non-whitening polyolefin film containing a glycerin derivative, an amine compound having a hydroxyethyl group, and an organic phosphite compound. The present invention relates to a polyolefin film that is excellent and has good antistatic properties.

Currently, polyolefin films are relatively inexpensive and have excellent mechanical properties, chemical resistance, heat resistance, transparency, electrical insulation, etc., so they are used in foods, clothing, home appliances, furniture, etc.
It is widely used as packaging material for toys, miscellaneous goods, etc., and as agricultural film.

However, this polyolefin film has the disadvantage of being easily charged with electricity, which can lead to, for example, accidents caused by ignition or electric shock during the processing process, difficulty in continuous packaging operations, and uneven printing and color tone due to ink scattering during printing. or dust on the product during storage.”
! It has the drawback of causing various damage such as a decrease in commercial value due to the adhesion of stiffness.

Therefore, conventionally, various methods have been used to impart antistatic properties to polyolefin films, such as methods of applying antistatic agents such as surfactants to the film surface;
The methods used include treating the film with a static eliminator, and kneading conductive substances such as carbon black and metal powder or antistatic agents into resin and then forming the film into a film.

However, the method of applying an antistatic agent to the film surface or the method of treating the film with a static eliminator has the disadvantage that the antistatic effect is only temporary, and the method of applying a conductive substance such as carbon black or metal powder to the resin has the disadvantage that the antistatic effect is temporary. *Although the p-injection method has a long-lasting antistatic effect, it has the disadvantage of being relatively expensive.

On the other hand, the method of kneading antistatic agents such as surfactants into resin is inexpensive and has a long-lasting antistatic effect, but there are various problems, such as the fact that even when added in small amounts, the additive is not easily absorbed orally. It bleeds out onto the surface of the molded product, resulting in a decrease in transparency (whitening phenomenon), and if added in large amounts, the surface condition of the molded product becomes poor, and the adhesion of cracks and stains is encouraged. Currently, in film manufacturing, the molding temperature is becoming higher (approximately 280°C) in order to improve production efficiency, and as a result, there are problems such as yellow coloring of the molded film. It has the disadvantage of causing a decrease in the product value of the product.

The present inventors have overcome these drawbacks of conventional antistatic polyolefin films, and have developed a polyolefin film that is non-whitening, has excellent color tone, has good antistatic effects, and is durable. As a result of intensive research, we found that by containing a glycerin derivative with a specific structure, an amine compound having a hydroxyethyl group, and an organic phosphite compound in a specific ratio,
We have found a way to achieve this objective, and based on this knowledge, we have completed the present invention.

That is, the present invention provides: <A) a glycerin derivative represented by the general formula % formula % (R1 in the formula is an alkylalkenyl group or acyl group having 8 to 22 carbon atoms); (B) a glycerin derivative represented by the general formula (in the formula R2 is an alkyl group having 8 to 22 carbon atoms; n is an integer of 0 or 1 to 10; and m is an integer of 1 to 10.) An amine compound having a hydroxyethyl group, and (0) Contains an organic phosphite compound represented by the general formula (R3 and R4 in the formula are hydrogen atoms, aliphatic hydrocarbon groups, or aromatic hydrocarbon groups, and may be the same or different) And (
The weight ratio of component A) to component 03) is 7=3 to 5.5.
The present invention provides a polyolefin film characterized by being within the range of

Examples of the resin used for molding the polyolefin film of the present invention include polyethylene resins such as high-density polyethylene, low-density polyethylene, and linear low-density polyethylene, polypropylene resins, and ethylene-propylene copolymers. .

There are two types of glycerin derivatives used as component (A) in the film of the present invention: glycerin monoesters and glyceryl monoethers. Examples of the former glycerin monoesters include glycerin monooctyl ester and glycerin monolauryl ester. , glycerin monomyristyl ester, glycerin monobalmityle stenopeglycerin monostearyl ester, glycerin monobehenyl ester, glycerin monooleyl ester, glyceryl monooleyl ether, glycerin monolyl ester, glycerin monolyl nyl ester, and the like.

Examples of the latter glyceryl monoethers include glyceryl monooctyl ether, glyceryl monolauryl ether, glyceryl monomyristyl ether, glyceryl monopalmityl ether, glyceryl monostearyl ether, glycerin derivative hemyl ether, glyceryl monooleyl ether, and glyceryl monooleyl ether. Examples include cetreyl ether, glyceryl monolyl ether, and glyceryl monolyl ether.

These compounds may be used alone or in combination of two or more, if necessary. Particularly preferred compounds include glycerin monopalmityl ester, glycerin monostearyl ester and mixtures thereof in 3.7 ratios (by weight), as well as glyceryl monopalmityl ether, glyceryl monostearyl ether and mixtures thereof in 3.7 ratios. Mixtures (by weight) may be mentioned.

The amine compounds having a hydroxyethyl group used as component 03) in the film of the present invention include alkyl monoethanolamines, alkyl jetanolamines, and polyoxyethylene alkyl amines. Examples of the alkyl monoethanolamines include lauryl Examples include monoethanolamine, myristyl monoethanolamine, valmityl monoethanolamine, oleyl monoethanolamine, and monoethanol tallow amine.

In addition, examples of alkylgetanolamines include laurylgetanolamine, myristylgetanolamine, palmityl diethanolamine, oleylgetanolamine, getanol tallow amine, and getanol coconut, and examples of polyoxyethylene alkylamines include: For example, polyoxyethylene (p=10)
Examples include laurylamine (tertiary amine), polyoxyethylene (p=5) stearylamine (tertiary amine), and polyoxyethylene (p=5) oleylamine (tertiary amine).

These amine compounds may be used alone or in combination of two or more. Particularly preferred compounds include jetanol hardened beef tallow amine.

The organic phosphite compound used as component (0) in the film of the present invention is represented by the general formula @), and examples of such compounds include compounds in which R3 and R4 are represented by the following. Particularly preferred among these are compounds in which R3 and R4 are 01 BH37-;
That is, it is distearylbentaerythritol dibosphite shown by the following structural formula.

In the present invention, it is necessary that the weight ratio of component (A) to component (03) to be used is within the range of 7:3 to 5:5, and the ratio of component (4) to component (03) to be used is from 7:3 to 5:5. If the weight ratio exceeds 70% by weight relative to the sum of the components, a whitening phenomenon will occur in the film, while if it is less than 50% by weight, a whitening phenomenon will occur and the antistatic effect will decrease.

In addition, the (C) component is the sum of the (A) component and the 0) component, 10
It is preferable to use within the range of o-s to lO parts by weight per 0 parts by weight; if the amount is less than 0.5 parts by weight, the film may be colored, and if it exceeds 10 parts by weight, the color tone of the film may change. does not improve any further, and rather the antistatic promoting effect decreases.

Furthermore, the usage amounts of component (France), component CB), and component (0) are such that the total amount of these three components is 0 per 100 parts by weight of resin.
．． It is preferably within the range of 0.01 to 5 parts by weight, and 0.01 to 5 parts by weight.
If the amount is less than 1 part by weight, the antistatic effect will be poor, while if it exceeds 5 parts by weight, the film will block and become sticky.
Problems such as decreased printability and adhesion of dirt and dust occur.

As a method for kneading component (A), component (B), and component (0) of the present invention into a polyolefin resin, a method commonly used when mixing various additives with a thermoplastic resin can be used.

In addition to the above components (A), CB), and (0), various additives commonly used for polyolefin resins, such as ultraviolet absorbers, lubricants, and finely powdered silica, may be added at the time of this crosstalk. It is also possible to add fillers, resin modifiers, etc.

In addition, in the molding of the polyolefin film of the present invention, methods normally used for molding polyolefin films, such as the inflation method and T-die method in extrusion molding, are used, and uniaxial or biaxial methods are used as desired. The antistatic polyolefin film of the present invention can also be stretched in the axial direction.Although the antistatic effect is good and long-lasting, it does not cause any whitening phenomenon and has excellent color tone, making it suitable as a commercial product. It is of high value.

Next, the present invention will be explained in more detail with reference to Examples.

The test methods and evaluation methods for the test items shown in the examples are as follows.

(1) Electrostatic voltage half-life Leave the sample in a constant temperature and humidity environment with a temperature of 20°C and a humidity of 50 parts for two weeks, apply a voltage of 10 KV to the sample, and measure the decay rate of the electrostatic voltage using a synchroscope after the application stops. The shorter the measured zero half-life, the better the antistatic properties.

(2) Non-whitening Hang the sample in a constant temperature and humidity environment with a temperature of 20°C and a humidity of 50°C.
After being left for a week, the whitening state of the sample surface was visually evaluated.

The evaluation was classified into the following five stages.

l The entire sample becomes deeply whitened 2 The entire sample becomes whitened 3 The entire sample becomes lightly whitened 4 Partially whitened 5 No whitening occurs at all (3) Place the sample in a thermostatic chamber with a film color tone temperature of 20°C and humidity of 50 parts. After being left for two weeks, the sample was rolled into a paper tube and the color of the end surface was visually evaluated. The evaluation was classified as follows.

O No coloration △ Pale yellow × Yellow In addition, each code shown in the table of Examples means the following compound.

AMC! : NgN-dihydroxyethyl yacyamine AM8: N,N-dihydroxyethyl beef tallow amine S
MG: Glycerin monostearyl ester DSP
: Distearyl pentaerythritol diphosphite DNP: Dinonylphenyl pentaerythritol diphosphite BHT: 2,6-di-t-butyl-4-methylphenoful LMG: Glycerin monolauryl ester SIL
: Silicon dioxide AGE : Stearyl glyceryl ether Example 1 Polypropylene resin with melt index (M engineering) 2.0 (manufactured by Idemitsu Petrochemical Co., Ltd., trade name: Idemitsu Polypro F'-20)
38) A total of 0.5 parts by weight of each component per 100 parts by weight
After kneading at 180°C using a Banbury type mixer with an internal volume of 3 tons, a 3m square pellet was produced using two rolls at 170°C.

The pellet thus obtained was molded using an inflation molding machine at a cylinder temperature of 270°C and a blow-up ratio of 2.
Under the conditions of 20. , μ-thick films were prepared and used as test samples. The various tests described above were conducted using this sample. The results are shown in Table 1 along with the blending ratio of each component.

Further, the total amount of each component was varied within the range of 0.3 to 0.7 weight and added to 100 parts by weight of the polypropylene resin, and samples were prepared and tested in the same manner as described above. The results are shown in Table 2 along with the blending ratio and addition amount of each component.

Note 1) SMG l! : The unit of AMS numerical value is
These are parts by weight relative to the sum of both, and the numerical units of DSF and BHT are parts by weight relative to 100 parts by weight of SMG + AMS.

Example 2 Low density polyethylene resin with melt index 2.0 (
Sumiyuki Shichinan F21O-6 (manufactured by Juman Kagaku ■) or high-density polyethylene resin with a melt index of 0.9 (manufactured by Idemitsu Petrochemical ■, Idemitsu Polyethylene 440M) or linear low-density polyethylene resin with a melt index of 2.1 (Made by Mitsui Petrochemical ■.

Urtozex UZ 3021 F) A total of 0.3 parts by weight of each component was added to 100 heavy weight parts and kneaded at 150°C using a Barbary type mixer with an internal volume of 3 tons, and then kneaded at 140°C using two rolls. A 3III+ square pellet was made.

The pellets thus obtained were put into an inflation molding machine at a cylinder temperature of 200°C and a blow-up ratio of 2.
A film with a thickness of 30 μm was prepared under the conditions of No. 5 and used as a test sample. The various tests described above were conducted using this sample. The results are shown in Table 3 along with the blending ratio of each component.

Note 1) SMG, AGK, LMG, AMS and A
The numerical unit of MC is parts by weight based on their sum, and the numerical degree of DIP and DNP is the sum of 1 of the above components.
Parts by weight are shown relative to 00 parts by weight.

Patent applicant: Lion Corporation Agent Akira Agata

Claims (1)

[Scope of Claims] 1(A) A glycerin derivative represented by the general formula % (R1 in the formula is an alkyl group, alkenyl group or acyl group having 8 to 22 carbon atoms); (B) a glycerin derivative represented by the general formula ( (wherein R2 is an alkyl group or alkenyl group having 8 to 22 carbon atoms, n is an integer of 0 or 1 to 10, and m is an integer of 1 to 1O); (0) Organic phosphite represented by the general formula (R3 and RA in the formula are hydrogen atoms, aliphatic hydrocarbon groups, or aromatic hydrocarbon groups, and may be the same or different) Contains a compound and (
A polyolefin film characterized in that the weight ratio of component A) to component 0 is in the range of 7:3 to 5:5. 2 The amount of component (C) is the sum of component (A) and component (B) 10
The polyolefin film according to claim 1, wherein the amount is in the range from 0.5 to 10 parts by weight. 3. The polyolefin film according to claim 1, wherein the total content of component (A), component (A), and component (C) is within the range of 0.01 to 5 parts by weight per 100 parts by weight of the resin. .