Monthly Archives: February 2019

Jilian Mold To Solve The Problem Of China Pet Bottle

The use of Pet Preform is very common in life. It is the habitat of many products, and it is easy to use and easy to carry. It has been recognized by customers. However, manufacturers will have some problems during production, which will affect us. Work, then what problems will you encounter during production? Xiao Bian compiled relevant information in this regard, together to understand.
When the surface of the PET bottle is marked, 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 of the pet preform that is inflated first contacts always tends to harden first. Therefore, the wall thickness of this part is also larger. The edge and the corner portion are the portions of the pet preform that are inflated and contacted, and the wall thickness of the portion is small. Therefore, the edges and horns of the PET bottle should be designed to be rounded. Changing the surface shape of the PET bottle, such as the relatively thin middle portion of the PET bottle, increases the circumferential groove or rib of the surface of the PET bottle, which 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.
Secondly, when designing extruded PET bottles, 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 preferably a circle. This facilitates the extrusion of the contents from the PET bottle. The PET parts used in conjunction with the PET bottle mouth are mainly caps and seals. The design of the PET bottle mouth should focus on how to make the PET bottle mouth better fit the lid and sealer. The bottom of the PET bottle is the weak part of the mechanical properties of the PET bottle. Therefore, the bottom of the PET bottle is generally designed to be concave; the corners of the PET bottle and the concave portion are excessively curved. In order to facilitate the stacking of PET bottles and increase the stacking stability of PET bottles, the inner bottom of the PET bottles should be designed with internal grooves.
Third, the printed surface of the PET bottle is the part of the consumer’s attention. The printing surface should be flat and continuous; if the PET bottle contains handles, grooves, ribs and other structures, care should be taken not to cause inconvenience to the printing operation. Elliptical PET bottles have higher stiffness, but the manufacturing cost of the mold is higher. Therefore, in order to ensure the rigidity of the PET bottle, in addition to selecting a material with high rigidity, the shape of the PET bottle is also designed to enhance the rigidity and load resistance of the PET bottle.
Fourthly, 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. For the transfer of a rectangular PET bottle, it is necessary to support most of the load of the PET bottle, so locally increasing the wall thickness at that place is also advantageous for improving the rigidity and load resistance of the PET bottle.
What are the problems with PET bottles in production? We have already told you in detail above that everyone should pay attention to this aspect when they are producing. Jilian Plastics has always insisted on producing high-quality China Pet Bottle products. We have accumulated good reputation and influence in the market. We can solve all the problems caused by our production. Welcome to contact us.

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How To Mold Pet Bottle Mould

Pet Preform are made up of high molecular polymers. PET is a high molecular polymer. The most important characteristic is its molecular weight. The molecular weight is the number of uniform molecules of the PET molecular chain. The longer the number of molecular chain linkages, the better the physical properties of PET. PET is a crystalline resin having a specific gravity of about 1.4, a melting point of 245 ° C, and a molding temperature of about 290 to 315 ° C.

PET pellets commonly used in the manufacture of containers must pay attention to the following characteristics:

(1) molecular weight;

(2) acetaldehyde content;

(3) diethylene glycol content;

(4) a carboxyl group;

(5) percentage of copolymer;

(6) melting point;

(7) Glass transfer point;

(8) Crystallinity.

PET raw material drying

PET is a hygroscopic material. If the water content is too high, hydrolysis will occur under high temperature processing, and the PET molecular chain will be broken and thermally decomposed to produce acetaldehyde. The physical and mechanical properties are reduced, and the crystallization rate is accelerated. When the preform is injected, it will cause Part of the preform is crystallized and whitened, which affects the quality of the product. Before the preform is injection molded, the PET pellets must be dried to a moisture content of 0.05% or less to produce a good amorphous transparent preform.

The dried PET pellets are circulated in the hopper by using high temperature air after dehumidification. For dry air, the dew point temperature must be between -29 ° C and -40 ° C. The temperature of the dryer was set between 177 ° C and 182 ° C and dried for approximately four hours.
Injection extension hollow molding
Basic principle
First, the injection molding process produces the preform, which is to melt the glue into the Pet Bottle Mould, and then rapidly cool to make the preform temperature lower than the crystallization temperature to make a transparent preform; the second step is to make the preform It is heated to a temperature above the glass transition point and then stretched, blown and cooled to form.
2. Processing method
Divided into one paragraph and two paragraphs.
One-stage is that the injection and blowing are done in the same machine, and the preformed preform is cooled to a temperature lower than the crystallization temperature, but remains in a thermoelastic state, and finally blown into a bottle.
The two-stage type is completed by two machines, an injection molding machine and a hollow molding machine. First, after the preform is made by the injection molding machine, the preform is cooled to a solidification temperature, taken out, cooled to room temperature, and when it is blown, it is sent to a hollow molding machine to heat the preform to the blowing temperature, and then blown, Cool molding.

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China Pet Bottle Welcome Choice

Because there are many Pet Preform standards, plastic bucket colors and different shapes, so when you grasp the following first selection criteria:

1. Cap seal, water vapor permeability. Air tightness and moisture permeability play a vital role in the stability of charging

2. Plastic bottle product quality standards. Product quality analysis is performed from the manufacturer’s product quality standards to determine if it is desirable. Pet preform enterprises should formulate corporate standards higher than national standards, and professional standards are more stringent.

3. Select the main material of the plastic bottle, the additive formula: the product standard of the solid plastic bottle is the applicable rule of the primary material, and it is necessary to match the non-toxic, no odor, etc., because there are many primary materials, this demand is selected as the material. For the overall function, tablets are generally made of high-density polyethylene, polypropylene bottles, such as PET bottles can be used for transparency of demand, better barrier function of PEN bottles, can be applied to a wider range, and is the best choice for medical supplies.

4. The stability and compatibility of plastic bottles. The use of plastic bottles, especially medical use of new plastic bottles (or new materials, new processes) should be packed with advanced medical tests to check the stability and charge of plastic bottles compatible with medical products. Medical plastic bottles are infiltrated with each other, dissolved, adsorbed, chemically reacted, and denatured can be determined by scientific testing.

5. Quality assurance system. Supplier audits have become an essential part of the purchase of plastic bottles. After reviewing the past, the factory can produce comprehensive and correct reviews of the software and hardware equipment, technical equipment, and overall quality of the product.

Jilian Plastics from Taizhou, China has always insisted on providing reliable and reliable China Pet Bottle to customers all over the world. Our products have also been applied to a wider range. Customers who welcome all kinds of needs are welcome to contact us. We will be your best choice not to be missed.

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Perfect Pet Preform Research And Development System

The China Pet Bottle of Jilian Plastics is exported to domestic and foreign markets. With more than ten years of strong technical force, it has been carefully manufactured and innovated. The company adheres to the principle of honesty and trustworthiness, and adheres to the business philosophy of the manufacturers. The interests of the premise, to meet the requirements of customers, to provide customers with * comprehensive and effective services. Integrity and pragmatism: Integrity-based, efficient and pragmatic, and fulfill the obligations and commitments to customers.

We have always kept in mind our mission to develop, produce and sell quality products that meet our customers’ growing needs in the field of motors. Provide quality service to customers. Create a high-quality, passionate brand. We will continue to work hard for the prosperity of the motor industry.

We have always adhered to the principle of honest service and quality priority, making full use of our technological advantages and professional talents, continuous innovation and improvement, and have enjoyed high reputation in the industry and won the support and love of the majority of users. The factory adopts domestic advanced processing technology, closely follows the international mold manufacturing standards, treats every product with excellence, guarantees high quality and high efficiency to complete every detail of mold making, and has established a perfect set of Pet Preform. The management system for mold development, production, sales and service ensures the quality of mold processing.

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The Demand For High-end China Pet Bottle Is Large

At present, the domestic market has a large demand for medium and high-end China Pet Bottle molds, among which the home appliance, automobile and plastic products industries have the largest demand for molds. It is understood that during the “Twelfth Five-Year Plan” period, the overall trend of the mold market is stable and upward, but domestic molds must meet the needs of users in terms of quality and delivery time.

The plastic mold industry is a traditional industry in China. It started earlier and developed more maturely. At the same time, it has also grown a group of SMEs with potential. Under the current international competition environment, the original advantages can no longer meet the requirements of modern trade processes. Compressing costs and the need to maximize profits, accelerating the development of e-commerce has become an inevitable choice for the domestic plastics industry to meet the challenges of economic globalization, grasp the initiative of development, and enhance international competitiveness. In the 21st century, e-commerce will become a plastic machinery mold. The main driving force for the growth of trade in the industry.

The leaders of the Pet Preform mold processing enterprises, after determining the development direction of the enterprise, must grasp the key points of the leadership work, clarify the key work of the enterprise, and not waste energy on other insignificant small things, if one thing It is impossible to promote employee enthusiasm, and it does not promote short-term or long-term promotion of corporate development profitability. This matter is unnecessary and can be ignored.

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