CN116200011A - A kind of anti-ultraviolet PET daily chemical bottle and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of polymer materials, and provides an anti-ultraviolet PET daily chemical bottle and a preparation method thereof. The daily chemical bottle is prepared by mixing various components and injection molding, and at least contains the following components: polyethylene terephthalate (PET), chitosan-modified polypropylene fiber antibacterial masterbatch, ultraviolet wave absorbing agent, stabilizer, chain extender, nucleating agent, film forming agent, mica sheet and silica nanoparticles; wherein, the mica sheet and the silica particles are dissolved in the coupling agent and the shell The polysaccharide-modified polypropylene fiber antibacterial masterbatch is mixed and dried; among them, the cooling process of injection molding is multi-stage cooling, so that the first third of the cooling time can quickly reduce the temperature by half. In this application, by adjusting the components of the daily chemical bottle and optimizing the preparation process, the daily chemical bottle not only has the anti-ultraviolet performance, but also prevents the phenomenon of wall hanging inside the bottle.

Description

A kind of anti-ultraviolet PET daily chemical bottle and preparation method thereof

technical field

The invention belongs to the field of polymer materials, and in particular relates to an anti-ultraviolet PET daily chemical bottle and a preparation method and application thereof.

Background technique

With the increasing demand for the application of plant extracts, biological enzymes, and other functional active ingredients in daily chemical products, the requirements for the packaging containers of such daily chemical products also increase.

Further, plant extracts, biological enzymes, and other functional active ingredients are scarce and valuable in terms of value content and extraction process, so the failure and waste of these ingredients should be avoided during application.

Therefore, in the process of transportation, storage and use, it should be protected as much as possible from decomposition or failure of components caused by ultraviolet interference. In addition, in actual use, due to the problem of the viscosity of the solution emulsion in different daily chemical products, the wall hanging phenomenon of the solution emulsion should be avoided to the greatest extent, so as to avoid the waste of objects in the container.

Contents of the invention

In order to solve the problems existing in the above-mentioned background technology, the present application aims to prepare an anti-ultraviolet PET daily chemical bottle, which makes the daily chemical bottle possess Anti-ultraviolet and the inner layer of the bottle does not hang on the wall; further, in the preparation method of the daily vase, by optimizing the preparation process, the inner surface of the bottle forms a micro-nano structure, thereby obtaining the effect of having a hydrophobic inner layer.

In the first aspect of the present application, an anti-ultraviolet PET daily chemical bottle is prepared. The daily chemical bottle is prepared by mixing various components and injection molding, and at least contains the following components:

Polyethylene terephthalate (PET), chitosan modified polypropylene fiber antibacterial masterbatch, UV absorber, stabilizer, chain extender, nucleating agent, film forming agent, mica sheet and two Silicon oxide nanoparticles;

Wherein, the mica sheet and the silica particles are mixed and dried by being dissolved in a coupling agent and chitosan-modified polypropylene fiber antibacterial masterbatch;

The cooling process of injection molding is multi-stage cooling, so that the first third of the cooling time can quickly reduce the temperature by half.

In this application, by adjusting the components of the daily chemical bottle and optimizing the preparation process, the daily chemical bottle not only has the anti-ultraviolet performance, but also prevents the phenomenon of wall hanging inside the bottle.

Among them, chitosan-modified polypropylene fiber antibacterial masterbatch, as a PP material with chitosan-modified addition, can be used as a modifier to optimize the water sensitivity of PET. Moreover, the chitosan of the masterbatch makes the daily chemical bottle have certain antibacterial properties and biocompatibility to a certain extent, further PP material can optimize the preparation process of PET, and make the compatibility and compatibility between PET and other components Increased toughness. Therefore, the PP material modified by chitosan is not only an antibacterial agent but also a compatibilizer in this application.

Wherein, the ultraviolet absorber is a PET-specific full-band ultraviolet absorber, and the ultraviolet absorber is a PET-specific ultraviolet absorber produced by Qingdao Jiedejia New Material Company.

Among them, it is also necessary to add stabilizers, chain extenders and film-forming agents at least after the components to improve the overall performance of the material, prevent PET from pyrolysis during the preparation process, and avoid problems such as cracks from being too brittle. The stabilizer used in the application is trimethyl phosphate (TMP) or triphenyl phosphate, which does not affect the transparency of PET; the nucleating agent used in the application is a calcium salt additive.

In this application, through the addition of chain extender and PP antibacterial masterbatch, the toughness of PET is greatly improved. Further combining with the PET preparation process of the present application, the cracking phenomenon of PET can be effectively avoided.

In this application, the addition of appropriate mica sheets can bend and deform the textile profile at high temperature, and the addition of silica particles can combine with the express cooling process of this application to form a micro-nano structure with lotus leaf effect on the surface, so as to achieve the hydrophobic effect of the profile .

In this application, the mica flakes and silica nanoparticles are mixed with PP masterbatch through a coupling agent in advance, and dried for future use. One is that mica sheet is used as a modified profile, which needs to be better combined with PET through PP, and the other is that carbon dioxide can be better dispersed in PP masterbatch by physical means and ultrasonic method, so that silicon dioxide can be in PET. The surface forms a more uniform micro-nano structure.

Further, the parts by weight of the components in the daily chemical bottle are specifically: 95-96 parts of PET raw material, 3-5 parts of chitosan-modified polypropylene fiber antibacterial masterbatch, 0.5-1 part of stabilizer, 0.2-0.3 parts of chain agent, 0.2-0.3 parts of nucleating agent, 0.2-0.3 parts of film-forming agent, 1-1.2 parts of mica flakes and 0.5-0.7 parts of silica nanoparticles.

Further, other functional components may also be included in the present application, and the parts by weight of the other components may range from 0.5 to 1 part, and may vary, as long as the injection molding reaction of the daily chemical bottle is not affected.

Further, the size of the silica nanoparticles is 20-500 nm, preferably 20-100 nm. Further, the actual size selection of silica is not directly proportional to the completion of hydrophobicity, but also needs to be further related to the roughness of the structure formed on the surface of silica, because the hydrophobicity of PET is also related to the specific molding process. In the application, the silica particles of 20-100nm are selected and combined with the injection molding process of the application, PET daily chemical bottles with good hydrophobic effect can be prepared. And silicon dioxide is added in PET daily chemical bottles as inorganic particles, and it is relatively safe to be used to hold daily chemical bottles.

Further, the daily chemical bottle is prepared through an integrated spiral injection molding mechanism, wherein the time and temperature of each stage of the injection molding machine can be precisely regulated through the central control setting system;

Wherein, the temperature of the PET injection plastic cylinder is 240-260°C; the initial mold temperature is 190-220°C; the cooling temperature is set in multiple stages; the injection molding pressure is 120-140MPa;

The injection molding time is 3 seconds, and the cooling time is 45-70 seconds.

Further, the injection cooling temperature of the daily chemical bottle is set in multiple stages, the first cooling temperature is half of the mold temperature, and the second and third cooling temperatures are proportionally reduced to 30-40°C.

In the second aspect of the present application, a method for preparing an anti-ultraviolet PET daily chemical bottle is disclosed, wherein the method comprises:

S1: Remove raw material moisture and impurities: carry out negative pressure drying on the required PET raw materials;

S2: Load mica flakes and silica: Dissolve mica flakes and silica in a weak alkaline solution at a ratio of 2:1 by weight, disperse evenly, and add coupling agent and chitosan-modified polypropylene fiber Antibacterial masterbatch, ultrasonically mixed for 2-3 hours, filtered and dried for later use;

S3: Raw material melting: suck the raw material in S1 into the melting barrel, after melting for 30-40 minutes, add the raw material in S2, stabilizer, chain extender, nucleating agent, film forming agent, and other components in one pot, and Enter the spiral section through the integrated screw injection molding machine, waiting for injection molding;

S4: Injection molding: perform injection molding according to the preset mold temperature, preset injection time and injection pressure;

S5: Cooling: After the injection molding is completed, a cooling section is performed, and the PET profile is cooled to 30-40°C through a multi-stage cooling section to obtain a PET daily chemical bottle.

Further, the temperature setting of each stage in the injection molding process is:

The temperature of the baking material in the step S1 is 75-80°C;

The melt temperature in the step S3 is 240-260°C;

The initial temperature of the mold in the step S4 is 190-220° C., the injection time is 3 seconds, and the injection pressure is 120-140 MPa.

Further, the injection cooling temperature of the daily chemical bottle is set in multiple stages, the first cooling temperature is half of the mold temperature, and the second and third cooling temperatures are proportionally reduced to 30-40°C; the cooling cycle The time is 45-70 seconds.

Wherein, the first cooling temperature is 85-110°C, and the corresponding first cooling time is between 22-35 seconds. Through rapid cooling, effective micro-nano structures can be imagined to achieve better hydrophobic effect. Under the further control of the inventor, the cracking of the PET bottle caused by excessive cooling is avoided, so the first cooling temperature is selected to be 85-110°C, and the corresponding first cooling time is 22-35 seconds to cool and shape the PET daily chemical bottle .

Wherein, the second cooling temperature is to lower the temperature of the PET profile to 62.5-70° C. within 11-19 seconds, further, the third cooling temperature is to cool the PET profile to 30-40° C. within the remaining time.

In the third aspect of the present application, an application of an anti-ultraviolet PET daily chemical bottle is disclosed. After using the daily chemical bottle to inject a solution or emulsion or after sealing the bottle, the bottle needs to be vacuum-exhausted.

Beneficial effects of the present invention:

This application improves the compatibility and flexibility of PET in injection molding by adding chitosan-modified polypropylene fiber antibacterial masterbatch and chain extender to further prevent subsequent cracking after molding; this application adds full-band ultraviolet absorption The anti-ultraviolet performance of the profile is made of the anti-ultraviolet agent; the application adds the film-forming agent and silica nanoparticles, and cooperates with the multi-stage cooling process to form the hydrophobic effect of the lotus leaf effect on the profile. And by adjusting the components of the PET daily chemical bottle and optimizing the injection molding process, a hydrophobic daily chemical bottle with UV resistance can be obtained.

Detailed ways

In order to facilitate a better understanding of the present invention, the following examples are used to illustrate, and these examples belong to the protection scope of the present invention, but do not limit the protection scope of the present invention.

Embodiment 1, prepare PET daily chemical bottle No. 1:

S1: Remove raw material moisture and impurities: carry out negative pressure drying on the required PET raw materials;

S2: Loading mica flakes and silica: Take mica flakes and silica and dissolve them in a weak alkaline solution at a ratio of 2:1 by weight, disperse evenly and add coupling agent and chitosan-modified polypropylene fiber Antibacterial masterbatch, ultrasonically mixed for 2-3 hours, filtered and dried for later use;

S3: Raw material melting: Inhale the raw material in S1 into the melting barrel, after melting for 30-40 minutes, add the raw material in S2, stabilizer, chain extender, nucleating agent, film forming agent in one pot, and through an integrated spiral injection molding The machine enters the spiral section and waits for injection molding;

S4: Injection molding: perform injection molding according to the preset mold temperature, preset injection time and injection pressure;

S5: Cooling: After the injection molding is completed, a cooling section is performed, and the PET profile is cooled to 35°C through a multi-stage cooling section to obtain a PET daily chemical bottle.

The weight ratio of each component of the PET daily chemical bottle is:

95 parts of PET raw material, 3 parts of chitosan modified polypropylene fiber antibacterial masterbatch, 0.5-1 part of stabilizer, 0.2-0.3 part of chain extender, 0.2-0.3 part of nucleating agent, 0.2-0.3 part of film-forming agent , 1 part of mica sheet and 0.5 part of silica nanoparticles.

Among them, the injection molding parameters of PET daily chemical bottles are:

The temperature of the baking material in step S1 is 80°C;

The melt temperature in the S3 step is 250°C;

The initial temperature of the mold in step S4 is 200° C., the injection time is 3 seconds, and the injection pressure is 140 MPa;

The cooling temperature in step S5 is set in multiple stages, the first cooling temperature is to reduce the profile temperature to 100°C at 25 seconds, the second cooling temperature is to reduce the profile temperature to 65°C at 38 seconds; the third cooling temperature is at 50 seconds Reduce the profile temperature to 35°C.

Embodiment 2, prepare PET daily chemical bottle No. 2:

S1: Remove raw material moisture and impurities: carry out negative pressure drying on the required PET raw materials;

S2: Loading mica flakes and silica: Take mica flakes and silica and dissolve them in a weak alkaline solution at a ratio of 2:1 by weight, disperse evenly and add coupling agent and chitosan-modified polypropylene fiber Antibacterial masterbatch, ultrasonically mixed for 2-3 hours, filtered and dried for later use;

S3: Raw material melting: Inhale the raw material in S1 into the melting barrel, after melting for 30-40 minutes, add the raw material in S2, stabilizer, chain extender, nucleating agent, film forming agent in one pot, and through an integrated spiral injection molding The machine enters the spiral section and waits for injection molding;

S4: Injection molding: perform injection molding according to the preset mold temperature, preset injection time and injection pressure;

S5: Cooling: After the injection molding is completed, enter the cooling section to cool the PET profiles to 35°C to obtain PET daily chemical bottles.

The weight ratio of each component of the PET daily chemical bottle is:

95 parts of PET raw material, 3 parts of chitosan modified polypropylene fiber antibacterial masterbatch, 0.5-1 part of stabilizer, 0.2-0.3 part of chain extender, 0.2-0.3 part of nucleating agent, 0.2-0.3 part of film-forming agent , 1 mica sheet. Compared with PET Daily Chemical Bottle No. 2, no silica nanoparticles were added.

Among them, the injection molding parameters of PET daily chemical bottles are:

The temperature of the baking material in step S1 is 80°C;

The melt temperature in the S3 step is 250°C;

The initial temperature of the mold in step S4 is 200° C., the injection time is 3 seconds, and the injection pressure is 140 MPa;

The cooling time is to reduce the profile temperature to 35°C within 50 seconds.

Embodiment 3, prepare PET daily chemical bottle No. 3:

PET daily chemical bottle No. 3 has the same raw material components as PET daily chemical bottle No. 1, and the injection molding process of PET daily chemical bottle No. 3 and PET daily chemical bottle No. 2 is consistent.

Embodiment 4, prepare PET daily chemical bottle No. 4:

PET daily chemical bottle No. 4 has the same raw material components as PET daily chemical bottle No. 1. The injection parameters of PET daily chemical bottle No. 4 are different from those of PET daily chemical bottle No. 1 in that:

The injection molding residence time of PET daily chemical bottle No. 4 is 5 seconds, and the cooling time is to directly reduce the material temperature to 30-40°C at 120 seconds.

Embodiment 5, prepare PET daily chemical bottle No. 5:

PET daily chemical bottle No. 5 has the same raw material components as PET daily chemical bottle No. 1. The injection parameters of PET daily chemical bottle No. 5 are different from those of PET daily chemical bottle No. 1 in that:

The injection molding residence time of PET daily chemical bottle No. 5 is 5 seconds, and the cooling time is to directly reduce the material temperature to 30-40°C at 40 seconds.

Embodiment 6, prepare PET daily chemical bottle No. 6:

PET daily chemical bottle No. 6 has the same raw material components as PET daily chemical bottle No. 1. Specifically, PET daily chemical bottle No. 6 does not add chain extenders, and the antibacterial particles are mica flakes;

The injection molding process of PET daily chemical bottle No. 6 and PET daily chemical bottle No. 2 is the same.

Embodiment 7, prepare PET daily chemical bottle No. 7:

There are differences in the raw material components of PET daily chemical bottle No. 7 and PET daily chemical bottle No. 1, specifically, the content of silica nanoparticles in the PET daily chemical bottle is 0.2 parts;

The injection molding process of PET daily chemical bottle No. 7 is the same as that of PET daily chemical bottle No. 1.

Embodiment 8, prepare PET daily chemical bottle No. 8:

The raw material components of PET daily chemical bottle No. 8 and PET daily chemical bottle No. 1 are different, specifically, the content of silica nanoparticles in PET daily chemical bottle is 2 parts;

The injection molding process of PET daily chemical bottle No. 8 and PET daily chemical bottle No. 2 is the same.

The PET plastic bottle was repeatedly squeezed 20 times with a constant pressure.

By the PET profile bottle of above-mentioned embodiment 1-8, the result is:

PET daily chemical bottle No. 4 had obvious cracking after the 10th extrusion; PET daily chemical bottle No. 5 had obvious cracking after the 5th extrusion; PET daily chemical bottle No. 6 had obvious cracking after the 3rd extrusion Obvious cracking phenomenon.

PET daily chemical bottle No. 8 had obvious cracking phenomenon after the 8th extrusion; PET daily chemical bottle No. 3 had obvious cracking phenomenon after the 11th extrusion.

PET daily chemical bottles No. 2 and No. 3 had obvious cracking phenomenon after the 14th and 15th extrusion; PET daily chemical bottle No. 1 and No. 7 had obvious cracking phenomenon after the 16th extrusion.

On this basis, wall-mounting tests were carried out on No. 1, No. 2, No. 3, No. 7 and No. 8 PET daily chemical bottles. Fill in 100g of the solution, stand still for 10 seconds, put the PET daily chemical bottle upside down and introduce the liquid in the bottle for 10 seconds, then weigh and pour out the liquid. This test is performed 3-5 times, the abnormal results are removed, and the average value is taken.

When the quality of the poured liquid is above 99%, it indicates that the hydrophobic effect is high;

When the quality of the poured liquid is above 98.5%, it indicates that the hydrophobic effect is in progress;

When the quality of the poured liquid is lower than 98.5%, it indicates that the hydrophobic effect is low;

The specific results are as follows:

number 1 number 2 number 3 Number 7 number 8 Silica content 0.5 parts 0 copies 0.5 parts 0.2 parts 2 copies rapid cooling section 3 segments of 50 seconds 1 segment 50 seconds 1 segment 50 seconds 3 segments of 50 seconds 1 segment 50 seconds pour out liquid mass 99.6g 97.4g 98.7g 99.1g 98.3g Effect high Low middle high Low

The basic principles and main features of the present application and the advantages of the present application have been shown and described above. Those skilled in the art should understand that the present application is not limited by the above-mentioned embodiments, and that described in the above-mentioned embodiments and the specification only illustrates the principle of the present application. Without departing from the spirit and scope of the present invention, the present application will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The scope of protection required in this application is defined by the appended claims and their equivalents.

Claims (9)

1. The ultraviolet resistant PET daily chemical bottle is characterized by being prepared by mixing all components through injection molding, and at least comprises the following components:

polyethylene terephthalate (PET), chitosan modified polypropylene fiber antibacterial master batch, a stabilizer, a chain extender, a nucleating agent, a film forming agent, mica flakes and silica nanoparticles;

the mica sheets and the silicon dioxide particles are dissolved in a coupling agent, mixed with chitosan modified polypropylene fiber antibacterial master batches and dried;

the cooling flow of injection molding is multi-stage cooling, so that the first third of cooling time can be rapidly reduced by half of the temperature.

2. The ultraviolet resistant PET daily chemical bottle according to claim 1 is characterized by comprising the following components in parts by weight:

95-96 parts of PET raw materials, 3-5 parts of chitosan modified polypropylene fiber antibacterial master batch, 0.5-1 part of stabilizing agent, 0.2-0.3 part of chain extender, 0.2-0.3 part of nucleating agent, 0.2-0.3 part of film forming agent, 1-1.2 parts of mica sheet and 0.5-0.7 part of silicon dioxide nano particle.

3. A uv resistant PET daily chemical bottle according to claim 1, wherein the size of the silica nanoparticles of the daily chemical bottle is 20-500nm, preferably 20-100nm.

4. A uv resistant PET daily chemical bottle according to any one of claims 1-3, wherein the daily chemical bottle is prepared by an integrated screw injection molding machine, wherein the time temperature of each stage of the injection molding machine can be precisely regulated and controlled by a central control setting system;

wherein the temperature of the PET injection molding material cylinder is 240-260 ℃; the initial temperature of the die is 190-220 ℃; the cooling temperature is arranged in a plurality of sections; the injection molding pressure is 120-140MPa;

the injection molding time is 3 seconds, and the cooling time is 45-70 seconds.

5. The uv resistant PET daily chemical bottle as claimed in claim 4, wherein the injection cooling temperature of the daily chemical bottle is set in a plurality of stages, the first cooling temperature is one half of the mold temperature, and the second and third cooling temperatures are reduced to 30-40 ℃ in equal ratio.

6. A method for preparing the ultraviolet resistant PET daily chemical bottle as claimed in claim 1, wherein the method comprises the following steps:

s1, removing raw material moisture and impurities: carrying out negative pressure material drying on the required PET raw material;

s2: loading mica sheets and silicon dioxide: dissolving mica sheets and silicon dioxide in a weakly alkaline solution according to a weight part ratio of 2:1, uniformly dispersing, adding a coupling agent and chitosan modified polypropylene fiber antibacterial master batch, ultrasonically mixing for 2-3h, filtering and drying for later use;

s3: melting raw materials: sucking the raw materials in the step S1 into a melting barrel, melting for 30-40min, adding the raw materials in the step S2, a stabilizing agent, a chain extender, a nucleating agent, a film forming agent and other components into a pot, and feeding the pot into a screw section through an integrated screw type injection molding machine to wait for injection molding;

s4: injection molding: injection molding is carried out according to the preset grinding tool temperature, the preset injection molding time and the injection molding pressure;

s5: and (3) cooling: after injection molding is finished, the PET profile is cooled to 30-40 ℃ by a multi-section cooling section to obtain the PET daily chemical bottle.

7. The method for preparing the ultraviolet resistant PET daily chemical bottle as set forth in claim 6, wherein the temperature of each stage in the injection molding process is set as follows:

the temperature of the material baked in the step S1 is 75-80 ℃;

the temperature of the molten material in the step S3 is 240-260 ℃;

the initial temperature of the die in the step S4 is 190-220 ℃, the injection molding time is 3 seconds, and the injection molding pressure is 120-140MPa.

8. The method for preparing the ultraviolet resistant PET daily chemical bottle according to claim 6, wherein the injection molding cooling temperature of the daily chemical bottle is set in a plurality of stages, the first cooling temperature is one half of the temperature of the mold, and the second cooling temperature and the third cooling temperature are reduced to 30-40 ℃ in an equal ratio; the cooling cycle time is 45-70 seconds.

9. Use of the uv resistant PET daily chemical bottle according to claim 1, wherein the daily chemical bottle is subjected to vacuum degassing after injection of a solution or emulsion or after sealing the daily chemical bottle.