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Pet Bottle Preform Routine Testing

PET bottles are re-processed by blow molding to form plastic bottles, including bottles for cosmetics, medicine, health care, beverages, mineral water, reagents, etc. This bottle making method is called two-step method, that is, preforming by injection molding, and again A method of blow molding to form a PET plastic bottle.

Conventional testing of Pet Bottle Preform has bottle wall thickness detection, pressure resistance test, and bottle cap open fatigue detection. PET manufacturers have their own quality inspection department.

PET is a milky white or pre-yellow highly crystalline polymer with a smooth and shiny surface. It is resistant to creep, fatigue, friction and dimensional stability, low wear and high hardness, and has the highest toughness in thermoplastics. It has good electrical insulation properties and is less affected by temperature, but has poor corona resistance. Non-toxic, weather-resistant, chemical-resistant, good water absorption, low acid resistance and organic solvents, but not soaked in heat-resistant water, not resistant to alkali.

The above is the PET packaging bottle introduced by Jilian Plastics. We believe that through the above, we have a certain understanding of the production process and quality inspection of Pet Bottle Mould. If you want to get more relevant information, please come and give us We leave a message and consult!

Jilian Mold Pet Bottle Mould To Make You Satisfied

The quality standard of Pet Bottle Preform is very important, which can affect people’s health. Therefore, auditing suppliers in the purchase has become an indispensable part of purchasing pet bottles.

In addition, in the carrying of pet bottles for foods and articles, the requirements for the sealing property of the bottle body and the cover and the water vapor permeability are relatively high. Sealability and water vapor permeability are two important technical indicators of pet bottles, which play an important role in the stability of the packaged product.

For any pet bottle, it must first meet the requirements of non-toxic, no odor, etc. Due to the wide variety of main raw materials available, it is necessary to select the comprehensive properties of the raw materials. Generally, high-density polyethylene and polypropylene bottles are used for tablets. Polyurethane bottle (PET bottle) is required for transparency. If it is required to have higher barrier performance, and block light and opacity, brown PET bottle is used. Liquid type drug generally uses polypropylene bottle or polyester bottle as the main raw material.

Jilian Plastic Mould provides a series of high-quality Pet Bottle Mould for the majority of customers, so that everyone can produce PET bottles with guaranteed quality, so what are you still hesitating? If you have any needs, please come and contact us. Choosing our company will definitely satisfy you.

How To Improve The Pet Bottle Preform Temperament

Now, the market demand has surged, and the glass bottle and pet market have been greatly squeezed. One reason for this is the rise of the high-end packaging market, which tends to use glass bottles and packaging. Because to some extent. Glass bottles show temperament far more than pet products such as pet bottles. Therefore, how to improve the quality of Pet Bottle Preform on certain outer packaging is obviously a competitive factor in the current market.
First of all, in this most advantageous acrylic pet bottle, pet packaging and other packaging widely used in the cosmetics field, one reason is that the appearance is very similar to the glass bottle, which can almost reach the true level. However, it is rarely used in food, medicine and other acrylic pet packaging, which is mainly edible packaging materials that cannot meet the requirements of acrylic pet bottles.
Secondly, of course, the process of adding additional processes to various pet bottles, in this process, the characteristics of some pet bottles present some characteristics of a glass bottle package. Pet bottles such as matte are packed so that the pet bottle package looks similar to a glass bottle. There are many such technologies, and there are many to explore with our merchants.
Finally, their temperament is a viable way to improve the pet’s own temperament. For example, some health care products use metal lid pet bottles, and pet bottles and chic design, so that pet bottles can greatly improve the overall temperament.
In fact, choosing a good Pet Bottle Mould will enable you to produce a quality guaranteed product. Jilian mold is a good mold manufacturer. Choose us to solve the problems in the production process. Welcome everyone. Customers come to contact us.

How Will The Pet Bottle Preform Be Deformed?

According to the molecular structure of the resin in pet, pet can be divided into two categories: crystalline pet and amorphous (also called amorphous) pet. The main difference between the crystalline pet and the amorphous pet is whether the resin molecules can form a certain degree of regular alignment from the molten state to the condensation. If a certain degree of regular arrangement can be formed, it is referred to as a crystalline form, and otherwise it is referred to as an amorphous form.

Crystalline pet and amorphous pet not only have significant differences in mechanical properties, but also have a large difference in shrinkage when changing from viscous flow to glass. The shrinkage of crystalline pet is usually 210 times that of amorphous pet. . At the same time, for crystalline pets, if the cooling rate of each part is inconsistent during cooling, the crystallinity of each part in the product will be different, and the difference in crystallinity will cause internal stress in the product, which will cause deformation of the product. Even cracking. Therefore, for crystalline pets, the cooling system design of the mold is an important aspect related to the degree of deformation of the Pet Bottle Preform.

In addition to the resin, some fillers are usually added to improve the mechanical, electrical, optical and thermal properties of pet. These fillers form molecular orientation during shear injection due to shear flow, and are analyzed by Moldflow software. Fiber orientation distribution. The orientation causes a significant difference in the shrinkage of the article in different directions. For example, for a 30 glass fiber reinforced PA66, the shrinkage rate is 0.4 in the flow direction and 1.1 in the direction perpendicular to the flow direction, and the difference in shrinkage in the different directions causes internal stress in the article. Therefore, for glass fiber reinforced pet products, the non-uniform orientation of the filler is often the main cause of deformation of the product. In production practice, in order to improve or eliminate the deformation of the resulting product, measures such as changing the position of the gate and adjusting the injection speed are generally employed. It can be seen that there are five major factors affecting the deformation of injection products, namely: forming raw materials, forming methods, product design, Pet Bottle Mould design and injection molding process conditions.

The Shape Of The Medicinal Pet Bottle Preform

The most common shapes of medicinal pet bottles are round, square, oval and so on. From the point of view of use, they each have their own advantages and disadvantages. Round pet bottles have a high stiffness but are not aesthetically pleasing. The square pet bottle has a beautiful appearance, but it is not easy to control the uniform thickness of the pet bottle during molding. The oval pet bottle has a higher rigidity, but the Pet Bottle Mould has a higher manufacturing cost. Therefore, in order to ensure the rigidity of the pet bottle, in addition to selecting the material with high rigidity, the shape of the pet bottle is also designed to enhance the rigidity and load resistance of the pet bottle.

Change the surface shape of the pet bottle, such as the middle of the pet bottle is relatively thin, increase the circumferential groove or rib of the surface of the pet bottle, can improve the rigidity and bending resistance of the pet bottle. Longitudinal grooves or ribs eliminate the offset, sagging or deformation of the pet bottle under long-term load. When designing a squeeze pet bottle, if the material is high density polyethylene or polypropylene, the pet bottle should have a rectangular or elliptical cross section. For low density polyethylene or other flexible pet bottles, the cross section is round. Shaped as good.

This facilitates the extrusion of the contents from the pet bottle. In order to make the pet bottle wall thickness uniform, it should be noted that the shape of the pet bottle should be symmetrical. Minimize extreme stretching points and parts. Arc transitions are used at all transitions. The printed surface of the pet bottle is the most concentrated part of the consumer’s attention. The printing surface should be flat and continuous; if the pet bottle contains handles, grooves, ribs, etc., the design should be careful not to cause inconvenience to the printing operation. When the surface of the pet bottle is marked with a label, the surface of the label should be flat.

A “sash” can be designed on the surface of the pet bottle to make the label accurately positioned without moving. At the time of blow molding, the portion where the parison inflates first contacts always tends to be hardened first. Therefore, the wall thickness of this part is also larger. The edge and the corner portion are the portions where the parison inflates the last contact, and the wall thickness of the portion is small.

Therefore, the edges and horns of the Pet Bottle Preform should be designed to be rounded. Since most pets have notch sensitivity, pet bottles are prone to cracks and cracks at sharp corners, roots of the mouth threads, necks, etc., so these parts should be designed to be rounded.

Jilian Mold Provides High Quality 5-gallon Pet Preform

After years of careful research, Jilian Plastics has developed a set of Pet Bottle Preform mold design. The professional structure of the preform mold design has been widely used in many packaging industries, and it is sold well in China with high quality, energy saving and long service life. In addition, it has won the praise of the majority of users and exported to Europe, South America, the Middle East, Southeast Asia, Africa and other countries and regions. Sales have increased steadily year by year.

We have advanced mold processing equipment, strong technical force, high-quality system for the design, modeling and programming of various preform molds, with the ability to manufacture high, fine and sharp molds. We are designed to use professional software to meet the needs of today’s market for plastic products and your needs.

We are a business elite representative, professional technical engineer, and a number of agencies, providing business consulting, technical support and after-sales service to customers and friends at any time. It also provides a one-stop service throughout the entire process of mold design, production and use, saving effort and effort. Welcome to contact us by phone, we provide you with a complete range of products, from 5-Gallon Pet Preform to caps, handles, etc. We welcome all interested customers to contact us, we will bring you satisfactory service.

How To Change The Shape Of The Pet Bottle Preform

The most common shapes for Pet Bottle Preform are round, square, oval, and the like. From the point of view of use, they each have their own advantages and disadvantages. Round pet bottles have a high stiffness but are not aesthetically pleasing. The square pet bottle has a beautiful appearance, but it is not easy to control the uniform thickness of the pet bottle during molding. The oval pet bottle has a higher rigidity, but the manufacturing cost of the mold is higher. Therefore, in order to ensure the rigidity of the pet bottle, in addition to selecting the material with high rigidity, the shape of the pet bottle is planned to enhance the rigidity and load resistance of the pet bottle.

Change the shape of the pet bottle, such as the middle of the pet bottle is relatively thin, add the circumferential groove or convex rib of the appearance of the pet bottle, can improve the rigidity and tortuosity of the pet bottle. Longitudinal grooves or ribs eliminate the offset, sagging or deformation of the pet bottle under long-term load. When planning a kneading pet bottle, if the raw material is high-density polyethylene or polypropylene, the cross section of the pet bottle should be rectangular or elliptical. The raw material is low-density polyethylene or other flexible pet bottle, and its cross section is round. Shaped as good.

This facilitates the extrusion of the contents from the pet bottle. In order to make the pet bottle wall thickness uniform, it should be noted that the shape of the pet bottle should be symmetrical. Minimize the pole stretching points and parts. Arc transitions are used at all transitions. The printed surface of the pet bottle is the most concentrated part of the consumer’s attention. The printed appearance should be flat and continuous; if the pet bottle contains handles, grooves, ribs, etc., it should be noted that it is not convenient to form the printing operation. When the label of the pet bottle is selected, the surface of the label should be flat.

A “sash” can be planned on the outside of the pet bottle to make the label accurately positioned without movement. At the time of blow molding, the portion where the parison is first inflated tends to be hardened first. Therefore, the wall thickness of the portion is also larger. The margin and the corner portion are the portions of the parison that are inflated and finally touched, and the wall thickness of the portion is small.

Therefore, the margin and the corner of the pet bottle should be planned to be rounded. Since most pets have notch sensitivity, the pet bottle is prone to cracks and cracks at the sharp corners, the roots of the mouth threads, the neck, etc., so these parts should be planned to be rounded.

Jilian mold has a variety of Pet Bottle Mould, and we can also design professional products for you according to your own needs. If you have such needs, please don’t hesitate to contact us. Let’s go.

Pet Bottle Preform Recovery Rate Increased

PET is a thermoplastic linear polyester, a typical high crystalline polymer. It is a non-toxic and tasteless food developed after the US Food and Drug Administration and Japan banned PVC for food and pharmaceutical packaging. It has the advantages of impact resistance, transparency, non-toxicity, high barrier property and low price, and it can maintain excellent physical properties and mechanical properties in a wide temperature range, so it has a wide range of applications.

The current recycling situation of Pet Bottle Preform is relatively good, the company attaches great importance to it, and the recycling rate is constantly rising and scraping. The recycling of PET bottles can not only reduce pollution, but also increase the benefits. However, the problem of safe utilization is still not completely solved. This is because the characteristics of the packaging materials themselves are the same as the transfer of pollutants from the materials to the food. The material will also absorb toxic substances. If it is not handled properly, it will be transferred to the food when it is reused. This is not good for people’s health. With the development of economic technology, the recycled PET bottles can be processed. Made of other products, the economic benefits are still relatively high

Therefore, it is necessary to conduct in-depth and specific analysis on the current status of PET bottle utilization, recycling status and safe reuse, in order to find the most effective way to solve the problem of recycling and safe reuse.

Jilian Plastics has rich experience in this aspect. We provide tailor-made Pet Bottle Mould design solutions to ensure that our products are better able to meet the needs of our customers, and also enable our brands to develop better in the market.

Jilian Plastic Mold Pet Bottle Mould Making Perfect Products

The reason why the Pet Bottle Preform appears white mist of the bottle:

1. The white mist in the bottle body is mostly related to raw materials and plasticization and cooling. The moisture of the raw materials should be checked, and there should be moisture in the dryer to ensure the dryness of the raw materials and dryers;

2. When the plasticization is insufficient, the back pressure should be increased, the machine temperature and the screw speed should be increased, and the screw buffer position should be ensured.

Reasons for crystallization at the bottom of the preform:

1. The nozzle temperature is too low and the activity is high. For this case, the nozzle temperature can be raised or lowered;

2. The pressure of the holding pressure is too large, and this situation can be avoided when the third stage of the holding pressure is reduced;

3. Poor cooling, resulting in crystallization, should check the pressure, temperature and flow of the cooling system in time, increase the cooling time and clean the mold cooling system;

4. Too little glue should increase the location and time of pumping;

5. The valve needle nozzle wear and the complete type of the heating ring are poor. The valve needle nozzle should be inspected and replaced, and the nozzle hot ring should be placed close to the nozzle.

Choosing Jilian mold, we not only provide you with the perfect Pet Bottle Mould, but also provide you with comprehensive after-sales service, so that you can make perfect pet products without worrying about other problems.

Pet Bottle Mould Affects Product Production

The bottom of the Pet Bottle Preform is whitish 1. The hot runner temperature is insufficient 2. The material temperature is less than 1. Strengthen insulation measures 2. Increase the temperature of the hot nozzle at this location. Appropriately increase the material temperature. Speed ​​up the injection speed 5. Reduce the pressure holding 6. Slow down the cooling water flow rate

Pet preform is opaque 1. Insufficient drying of raw materials 2. Insufficient plasticization of raw materials 3. Pp>The wall thickness of the preform is too large or insufficiently cooled. Mix in other plastics 5. The material temperature is too low 1 to ensure drying for more than four hours. Increase the material temperature 3. Increase the screw speed 4. Check if the dry material temperature is too small or the injection volume does not match. It must be ensured that the raw material is dried at 165 degrees to a moisture content of less than 0.02%. Strengthen cooling, thin wall thickness

The PET preform is changed from transparent to opaque. 1. The film removal temperature is too high. Strengthen the cooling water 2.2. Extend the cooling time 3. Change injection time

There is fog on the side of the PET preform. The pressure is too high 2. The bottom film gate hole is eccentric 1. Reduce the pressure 2. Correcting the mold

Pet preform has silver or yellow 1. Plastic decomposition 1. Reduce the drying temperature and prolong the drying time. Adjust the injection speed 3. Reduce the material temperature 4. Lower the temperature of the hot nozzle

PET preform has bubbles 1. Dry less than 1. Strengthening drying 2. Increase the material temperature 3. Reduce screw speed

There are irregular ring grooves in the PET preform. 1. The water vapor condenses in the core cavity. Strengthen the drying of the workshop. Increase the cooling water temperature 3. Dry the Pet Bottle Mould