What is the difference between a blow molding process and an injection molding process?

The blow molding products are all hollow; because of the injection molding port, the molded product will have a small and unnecessary part, and there will be a process to cut it off, but if you look carefully, you can still find it; Injection molding is a method in which a thermoplastic or thermosetting molding compound is first uniformly plasticized in a heating cylinder and then pushed by a plunger or a moving screw into a cavity of a closed mold.


Injection molding is suitable for most of thermoplastics. In recent years, injection molding has also been successfully used to form certain thermoset plastics. Injection molding has a short molding cycle, and the quality of molded products can range from a few grams to several tens of kilograms. It can form molded articles with complex shapes and precise dimensions with metal or non-metal inserts at one time. Therefore, the method is highly adaptable and has high production efficiency.


Blow molding: A method in which a hot parison closed in a mold is inflated into a hollow article by gas pressure, or a tubular parison is inflated into a tubular film. This method is mainly used in the manufacture of various packaging containers and tubular membranes.


IMelt blown index of 0.04~1.12 is a relatively good hollow blow molding material, such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, thermoplastic polyester, polycarbonate, polyamide, cellulose acetate and poly An acetal resin or the like in which polyethylene is most used.

Injection Blow Molding: The plastic is first made into a bottomed parison by injection molding, and then the parison is moved into a blow mold to be blown into a hollow product.

Extrusion blow molding: The plastic is first made into a bottomed parison by extrusion, and then the parison is moved into a blow mold to be blown into a hollow product.

Stretch blow molding: Stretch blow molding is a blow molding of biaxially oriented stretching by first stretching the form longitudinally and then inflating with compressed air to achieve transverse stretching. Stretch blow molding can greatly improve the transparency, impact strength, surface hardness and rigidity of the product, and is suitable for blow molding of polypropylene and polyethylene terephthalate.

Blown film method: A method of forming a thermoplastic film. The plastic is first extruded into a tube by extrusion, and then continuously expanded to a tubular film of a certain size by air blown into the tube, and then folded and wound into a double-layer flat film after cooling.

Bottle packaging personalization is the trend

Bottle packaging personalization is the trend

With the development of artificial intelligence and all kinds of new technology during recent period of time, more and more new ideas and technology began to impact the traditional industries such as cosmetics. For cosmetics, The sale way already changed from the traditional counters to online sales then to derivative areas, and in the present, it is still in the changing constantly. personalization will become a trend in the future, which is inseparable from the packaging customization of cosmetic plastic bottle.

Therefore, in the future, with the increasing demand for customization of cosmetic plastic bottles, the cosmetic plastic bottle industry will face new changes. For those who do not have design capabilities, they will face shuffle and elimination, which is inevitable.

According to the change of trend, this trend is inevitable for cosmetic plastic bottle enterprises, so it is very important to try to embrace and change the changes in the future on the basis of the market.

What plastic bottle does silicone oil free shampoo use

When people are shopping for a new shampoo product, they are generally learning more about its ingredients, efficacy and technology. Shampoo products from the regular effect of original anti-dandruff, anti-dandruff, repair damage, anti-hair loss and so on to a more in-depth silicone oil free products.

Silicone free “is not only to remove the silicone oil, but also should consider consumer interests and enterprise sustainability. The connotation of “silicon free oil technology” includes: surfactant used for low-stimulation cleaning, adjuvant used to replace silicon oil, effective ingredients for scalp care.

For the high-tech, high-quality and concentrated shampoo products newly developed in recent years, people will have a good experience when using it, and naturally they will notice the package of this shampoo, namely the plastic bottle of this shampoo, which is made of what material.

With a brief introduction, the plastic bottle for this shampoo must be high-end, environmentally friendly and has good sealing performance. The material is usually PET and PE.

What kind of transparent plastic bottles are available in the market?

Transparent plastic bottles on the market are mainly made of PET, PP, PVC and ABS

PET is hard, good toughness, high strength, bright surface, environmentally friendly and non-toxic.PET is transparent and comes in a variety of colors.


The disadvantage is that high cycle heat bonding is relatively difficult and the price is slightly more expensive than PVC. This material is often required to be replaced by high-grade and environmentally friendly users. PET material is generally used to make plastic bottles for packaging food, beverage and medicine industries normally before. But now more and more cosmetics brands like to choose PET packaging as their bottle containers.

PP material: Special soft material, good toughness, environmental non-toxic and high temperature resistance, often made into food and beverage utensils or other high-temperature products packaging; But its plasticity is poor, the processing difficulty is big, the surface glossiness is poor, and the color can change when processing,which are mostly used to make one-time plastic bottle.


PVC material, It is soft, strong and plasticity. It can be made into transparent and various colors.

ABS material, Most ABS are non-toxic and impervious to water, but slightly water vapor, low water absorption, room temperature immersion of less than 1 percent a year and physical properties do not change.ABS resin product surface can be polished, can get high gloss products.It’s three to five times stronger than regular plastic.

Why a sachet of shampoo is cheaper than a bottle of shampoo

Some one will ask us why a sachet of shampoo is cheaper than a bottle of shampoo? Here are the reasons

1, Cost of packaging: With regard to the same capacity and same product. the cost of a bottle is higher than that of a sachet.

2, Usage: Sachet packaging is normally small.It is widely used for disposable usage.It is a good packaging for promoting the real products.In other words, a bottle of shampoo is the final product itself after testing the sachet.

Sometimes, the sachet packaging is free of charge, as a promoting gifts of sample.

Acrylic bottle packaging needs more room for development.

Acrylic bottle packaging needs more room for development.

Acrylic bottles, the largest market lies in the field of cosmetic packaging. We found that, in addition to the cosmetic packaging market, only health care products packaging uses some acrylic packaging.

It can be said that in many markets, we almost can not see the acrylic bottle. Because the material is plastic, easily crushing, while the lower cost and has the appearance and effect of glass bottles, which are widely welcomed by the cosmetics packaging market.
However, in addition to the cosmetics market, acrylic bottles in the food, beverage, pharmaceutical and other areas do not have much market space, which is acrylic bottle packaging needs more room for development.

Why most plastic bottles are in round shape?

Why most plastic bottles are in round shape?

Today, Most of the plastic bottles are round, only some beverage plastic bottles are square.In fact, The plasticity of plastic bottle is very strong, It not only can shape up the common variety of plastic bottle shape, but also can customize special variety of bottle shape. This is the advantage of plastic bottles that simply created by a pair of mold.

However, Some people would ask why the plastic bottles on the market are mostly round? In fact, That is because the circular plastic bottle is easy to catch, easy to carry, and does not take up space during the transportation.
This is why plastic bottles can quickly squeeze out the market share of glass packaging. We hope we will improve the round plastic bottle into another good level.

The changes of cosmetic bottle packaging

The changes of cosmetic bottle packaging

The trend of cosmetic bottle packaging has changed a lot in recent years. In the past, cosmetic manufacturers, which have always attached importance to offline channels, are placing great emphasis on the appearance of cosmetic bottle packaging. Both materials and appearance of the cosmetic bottle are valued by the manufacturers and distributors.

However, in the e-commerce market, cosmetics are the most affected. For online cosmetics bottles, left the off-line counter lighting, and pay more attention to the practicality. Therefore, the cosmetics market over the past two years turned to be simple and practical. This is also a new positive environmental change brought by the cosmetics bottle market.

For cosmetic bottle packaging, the future trend is still lightweight, simplistic, which is the inevitable trend of the future.

The evolution of eye drop bottle packaging

        The evolution of eye drop bottle packaging

Perhaps because the eye drop products are vulnerable to the bacterial invasion after first time using, So the validity only last for a week.
Whereas the previous eye drop bottles were often between 15 and 30ML. However, It was impossible to use up within a week. It would lead to waste.

After all, a bottle of eye drops price is not low in the current market.This makes the market now have the twist up eye drop bottle in small volume, which can be used for one time only.But because of disposable packaging, the bottle packaging is not precise enough.Suppliers need to improve the packaging in the future.

The bottle material directly affect the printing effect

Some customers would asked why some silkscreen printing easy to fall off. One of the direct influence factors are bottle material.
If the bottle material is not pure, it has a considerable influence on adhesion force of the printing. In the printing material on the market at present, it mainly because of the mixed reclaimed materials. some bottles are made by reclaimed materials in cheap price, but the quality will be greatly reduced. Secondly, Company craft difference will cause plastic surface present different situation, there will a lot of grease on the some material surface to affect its adhesion force. The color of the bottle material also has effect on receiving ultraviolet (uv) light, which may also affect its adhesion force.

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