CN1765970A - Highly effective antistatic agglomerate for biaxial tension polypropylene and its preparation method - Google Patents

Abstract

The invention relates to a highly effective antistatic agglomerate for biaxial tension polypropylene and its preparation method, wherein the agglomerate comprises raw materials of the following constituents (by weight proportion): polypropylene 70-90%, antistatic agent 8-30%, grinding agent 0.1-1%, dispersing agent 0.1-2%, anti-oxidant 0.1-1%, inhibiting agent 0.1-0.5%, anti-ageing 0.1-0.5%.

Description

Highly effective antistatic agglomerate for biaxial tension polypropylene and preparation method thereof

Technical field

The present invention relates to a kind of highly effective antistatic agglomerate for biaxial tension polypropylene and preparation method thereof, than having long lasting antistatic property under the few additive, can be used for making polypropylene film goods, belong to polyacrylic polymer modification technology field with antistatic property.

Technical background

Biaxially oriented polypropylene film (BOPP) (BOPP) film has characteristics such as high gloss, high-stiffness, gas barrier property are good, shock strength height, is a kind of high transparent packaging material of excellent property.Since the later stage eighties so far, the BOPP film is used widely on the packing of industries such as food, beverage, cigarette, clothes.Existing BOPP antistatic property is not lasting, add static inhibitor after film-forming properties poor, disperses badly, defective is many, and easily aging, film forming is rubescent, transparency decline.

Summary of the invention

The object of the present invention is to provide a kind of than having long lasting antistatic property under the few additive, and the highly effective antistatic agglomerate for biaxial tension polypropylene that film forming for a long time can variable color and preparation method thereof.

For realizing above purpose, technical scheme of the present invention provides a kind of highly effective antistatic agglomerate for biaxial tension polypropylene, it is characterized in that, it is made by following materials of weight proportions:

Polypropylene 70-90%

Static inhibitor 8-30%

Increase grinding agent 0.1-1%

Dispersion agent 0.1-2%

Oxidation inhibitor 0.1-1%

Inhibitor 0.1-0.5%

The described polypropylene of anti-aging agent 0.1-0.5% is Biaxially oriented polypropylene film (BOPP) (BOPP) PP Pipe Compound, and its melting index is 0.8-30g/10min; Described static inhibitor is a non-ionic antistatic agent, can be glyceride type, also can be the saturated homologue of hydroxyethyl alkylamine, can be single also can be blended;

The described grinding agent that increases is inorganic ultrafine particle, can be ultra-fine SiO ₂Particle;

Described dispersion agent can be organic wax class, also can be the stearic amide class, can be single also can be blended;

Described oxidation inhibitor is Hinered phenols antioxidant, can be 1010, also can be composite with phosphite ester kind antioxidant, and can be 1010 and 168 composite;

Described inhibitor is the amine inhibitor; Described anti-aging agent is a hindered amine light stabilizer, can be 770,944, also can be 770 and 944 composite.

A kind of preparation method of highly effective antistatic agglomerate for biaxial tension polypropylene is characterized in that, adopts one-step technology,

Its method is as follows:

(1) weighs raw material by weight ratio;

(2) all raw materials being put into the high mixer kind mixed 2-5 minute;

(3) discharging;

(4) raw materials mixed is placed screw rod machine extruding pelletization, the rotating speed of screw rod machine is 180-600 rev/min, and temperature is 160-240 ℃.

Biaxially oriented polypropylene film (BOPP) (BOPP) PP Pipe Compound is to be specifically designed to produce the class acrylic resin that BiOriented Polypropylene Films is used.It has high-clarity, high gloss, high-stiffness after two-way stretch, gas barrier property is good, shock strength is high.

Non-ionic antistatic agent can be compatible well with polypropylene because its polarity is low, and glyceride type and the compound use of hydroxyethyl alkyl amine can make the film article with large surface area have antistatic effect rapidly, and have the long-term effectiveness that continues.

Because part was incompatible when static inhibitor and other additive and resin worker mixed, and had certain effect of trying to shirk responsibility, charging causes difficulty when giving extrusion molding, and adding a spot of grinding agent that increases can address this problem.

Dispersion agent can improve the dispersion homogeneity of additive, makes material have consistent antistatic property.

Oxidation inhibitor makes BOPP that good processing stability be arranged in the course of processing, avoids color and luster, performance to change.Used Hinered phenols antioxidant can be 1010, also can be composite with phosphite ester kind antioxidant 168.

Inhibitor can prevent the general red phenomenon of film that static inhibitor and oxidation inhibitor interact and causes.

Anti-aging agent can prevent because the material aging variable color that photoinduction degraded physical and chemical process causes.

The present invention adopts polypropylene as matrix resin, adopt one-step technology to make a kind of highly effective antistatic agglomerate for biaxial tension polypropylene, can be used for making polypropylene film goods with antistatic property, it is not lasting to have solved existing BOPP antistatic property, film-forming properties is poor after adding static inhibitor, disperses badly, and easily wears out, the shortcoming that film forming is rubescent has prepared a kind of than the highly effective antistatic agglomerate that has long lasting antistatic property under the few additive.

Advantage of the present invention is that addition is little, is 1.5-25%, and long-acting stable, life-time service can be general not red, good film-forming property in the process of making film, and antistatic efficient height, surface resistivity is 10 ⁹-10 ¹⁰, transformation period 1-5 second, can extensively add anlistatig polypropylene film goods to.

Specific embodiments

Below in conjunction with embodiment, the present invention is described in further detail:

Embodiment 1

With Biaxially oriented polypropylene film (BOPP) BOPP PP Pipe Compound is matrix resin, and static inhibitor is glyceryl ester and hydroxyethyl alkylamine (1: 1) composition, with ultra-fine SiO ₂Particle is dispersion agent for increasing grinding agent with the stearic amide, is oxidation inhibitor with 1010 and 168 (1: 1) compound, and inhibitor is the amine inhibitor, is anti-aging agent with 770.

Proportioning 1

Material name	Weight percent (%)
		The BOPP PP Pipe Compound	78.8
Static inhibitor	18
		SiO 2	0.5
Stearic amide	1.5
		1010/168	0.5
The amine inhibitor	0.2
		770	0.5

All raw materials were put into high-speed mixer and mixing 4 minutes, and the screw extrusion press extruding pelletization is used in discharging then, and processing temperature is at 200 ℃, and the screw rod revolution makes the BOPP highly effective antistatic agglomerate at 450 rev/mins.

Embodiment 2

With BOPP is matrix resin, and static inhibitor is saturated partial esterification glyceryl ester and hydroxyethyl alkylamine (1: 1) composition, with ultra-fine SiO ₂Particle is dispersion agent for increasing grinding agent with the stearic amide, is oxidation inhibitor with 1010 and 168 (1: 1) compound, and inhibitor is the amine inhibitor, is anti-aging agent with hindered amine as light stabilizer 770/944 (1: 1).

Proportioning 2

Material name	Weight percent (%)
		BOPP	76.8
Static inhibitor	20
		SiO 2	0.5
Stearic amide	1.5
		1010/168	0.5
The amine inhibitor	0.2
		770/944(1∶1)	0.5

With the complete processing of embodiment 1, make a kind of highly effective antistatic agglomerate for biaxial tension polypropylene.

Embodiment 1 and embodiment 2 prepared master batches are performance comparison in BOPP uses, and the BOPP raw material is mixed with 10% above-mentioned master batch respectively, makes film A and film B through two-way stretch then.Testing standard is: GB1410, relative humidity 50%.

	Film A	Film B
			Surface resistivity (Ω)	2.46×10 10	8.75×10 9
Transformation period (s)	5	3

Claims (9)

1. a highly effective antistatic agglomerate for biaxial tension polypropylene is characterized in that, it is made by following materials of weight proportions:

Polypropylene 70-90%

Static inhibitor 8-30%

Increase grinding agent 0.1-1%

Dispersion agent 0.1-2%

Oxidation inhibitor 0.1-1%

Inhibitor 0.1-0.5%

Anti-aging agent 0.1-0.5%

2. highly effective antistatic agglomerate for biaxial tension polypropylene according to claim 1 is characterized in that, described polypropylene is Biaxially oriented polypropylene film (BOPP) (BOPP) PP Pipe Compound, and its melting index is 0.8-30g/10min.

3. highly effective antistatic agglomerate for biaxial tension polypropylene according to claim 1, it is characterized in that described static inhibitor is a non-ionic antistatic agent, can be glyceride type, also can be the saturated homologue of hydroxyethyl alkylamine, can be single also can be blended.

4. highly effective antistatic agglomerate for biaxial tension polypropylene according to claim 1 is characterized in that, the described grinding agent that increases is inorganic ultrafine particle, can be ultra-fine SiO ₂Particle.

5. highly effective antistatic agglomerate for biaxial tension polypropylene according to claim 1 is characterized in that, described dispersion agent can be organic wax class, also can be the stearic amide class, can be single also can be blended.

6. highly effective antistatic agglomerate for biaxial tension polypropylene according to claim 1 is characterized in that, described oxidation inhibitor is Hinered phenols antioxidant, can be 1010, also can be composite with phosphite ester kind antioxidant, and can be 1010 and 168 composite.

7. highly effective antistatic agglomerate for biaxial tension polypropylene according to claim 1 is characterized in that, described inhibitor is the amine inhibitor.

8. highly effective antistatic agglomerate for biaxial tension polypropylene according to claim 1 is characterized in that, described anti-aging agent is a hindered amine light stabilizer, can be 770,944, also can be 770 and 944 composite.

9. the preparation method of a highly effective antistatic agglomerate for biaxial tension polypropylene is characterized in that, adopts one-step technology, and its method is as follows:

(1) weighs raw material by weight ratio;

(2) all raw materials are put into high-speed mixer and mixing 2-5 minute;

(3) discharging;

(4) raw materials mixed is placed screw rod machine extruding pelletization, the rotating speed of screw rod machine is 180-600 rev/min, and temperature is 160-240 ℃.