How do airless pump bottles work?

How do airless pump bottles work?

The airless pump bottles we saw from the market are made of a round/oval bottle body externally and a piston at the bottle bottom internally. Triggered by the force of the spring, and excluded the air by utilizing contraction force, the piston will be pushed forward afterwards. But we need to be remind that the contraction force between piston and bottle wall cannot be too strong, otherwise it wouldn’t be easily pushed forward. If too much pushing, the products will be leaked from the gas between the piston and the bottle wall, in this case, there will be a strictly request to the production airless pump bottle

Airless pump bottles can be isolated from the air totally, so that the interior products won’t be oxidized or bred by bacteria because of exposing to the air. Besides, its high quality and eye catching design attracts more brands to pay more costs to upgrade their packaging by the high end airless pump bottle.

Canavard Packaging Factory is one professional manufacturer since its establishment in 2011. Owing to our high quality products, good sales volumes and satisfactory services, we earned a certain market share in the global market. We mainly focus on high quality cosmetic packaging with food grade certificates. We welcome all buyers to get high quality packaging at cheaper factory price.

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Things you need to know when seal aluminum foil seal

Things you need to know when seal aluminum foil seal

Below are couples of things you need to avoid when sealing aluminum foil seal, thus to increase your rate of success.
1. The bottle cap is not tightened (this problem only needs to be solved by tightening the bottle cap every time it is sealed)
2. The bottle mouth is not flat ( it is a quality issue for the bottle, you need to find a reliable supplier)
3. The bottle mouth has very obvious burrs
4. There is dust or other attachments on the bottle mouth.
5. The heating power and the running speed do not match.
6. The sealing box is inclined, resulting in an unbalanced induction temperature.
7. When adjusting the position of the bottle on the conveyor belt, it must correspond to the downward arrow on the equipment and be in the center state.
8. There is a lot of dust in the sealing box, and the dust needs to be cleaned.
9. The adjustment distance between the bottle mouth and the sensing surface is too far.
Hope this is helpful for you. And welcome to contact us to get the aluminum foil seal.

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What is PCR plastic?

Detailed analysis of PCR materials

The pollution problem of ordinary plastics is becoming more and more serious.  The protection of the sustainable development of the ecological environment has become the consensus of people in daily life. The recycling of packaging materials is currently one of the important ways to solve such problems.

As a company with a sense of social responsibility, our factory can now use PCR(Post-Consumer Recycled) plastic to produce bottles. Let’s show everyone what pcr materials are.


1. What is  PCR material?

PCR is Post-Consumer Recycled in English, which generally refers to the recycling of plastic after use. The recycled plastic particles are mixed with the original resin to produce a variety of new plastic products.


2. PCR material production process
The production of PCR materials includes processes such as manual roughing-automatic machine sorting-washing-modified granulation.

1). Manual rough selection is mainly used to manually distinguish used plastic products according to different colors and different materials.
2). Automatic machine sorting is to use near-infrared automatic sorting production line, large electrostatic sorting production line, color sorter and other equipment to further classify materials according to color and material.
3). Cleaning is to remove the stains, electroplating layer, oil spray layer, etc. on the surface of the material through water washing and rapid friction.
4). After the above process, raw materials with a single material and basically the same color are obtained;

After the raw materials are divided into batches, the performance of each batch is tested for use. Then according to the customer’s requirements for product performance and color, the raw materials are modified and color-matched and granulated.

3. The impact of PCR on the environment
PCR materials can help the country’s carbon neutrality, promote the recycling of resources, turn waste into treasure, greatly reduce the waste of resources. It also means that fewer waste plastics are buried, incinerated and exist in the natural environment, reducing environmental pollution.








4. Tips for use
After a lot of experimental data, our factory suggests that customers should consider the percentage of PCR when choosing PCR material bottles.
1)Transparent bottles should use no more than 30% PCR.
2)Seml-Translucent bottles should use no more than 50% PCR.
3)Solid color bottles do not exceed 100% PCR.

Canvard Packaging Mission: Customer satisfaction on product qualities and services, is committed to create the industry’s core competitiveness.

We have thousands of plastic containers, some of them are private mould from our trusted customers. Our focus is to develop innovative cosmetic items, so we are willing to create the new design for more clients.
We offer full service for our clients, it includes design, manufacture and transport, we guarantee the good quality products

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7 types of plastic material you have to know when buy plastic bottle

7 types of plastic material you have to know when buy plastic bottle

Nowadays, there are various types of plastic bottles on the market. Consumers are dazzled. Some customers worry about the compatibility of bottles for their products, and some customers worry about the environmental protection of plastic bottles.

As the company’s sense of social responsibility increases, Many brands require or only accept recyclable plastic bottle packaging, so how to choose a high-quality plastic bottle that suits you is worth studying. Now I will provide you with several methods for your reference.

what does these number means?

In the first step, we first look at the material of the bottle. The material is very particular. Different materials can hold different products, and there are certain compatibility issues. Usually there is a label framed by a triangle symbol on the bottom of the bottle. The triangle formed by the three arrows means that the material of the bottle is ‘recyclable’, but this does not mean that it can be reused. Each bottle has its corresponding plastic bottle material type label, which is 1, 2, 3, 4, 5, 6, 7, and each number represents a type of material. If the product is made of several different materials, then what is marked is its main material. Identifying different numbers is to facilitate classification and recycling, and has nothing to do with the “safety” of the bottle. So what does this number mean?


Meaning of number 1, PET


The number 1 in the triangle at the bottom of the plastic bottle: PET polyethylene terephthalate, commonly used for mineral water bottles, carbonated beverage bottles, shampoo bottles, shower gel bottles, alcohol disinfectant bottles, etc. It is well known that beverage bottles made of this material cannot be filled with hot water. They are only suitable for warm or frozen drinks. The bottle is easily deformed if it is filled with high-temperature liquid, and releases harmful substances to the human body. It is not suitable Long-term repeated use or containing acidic substances.


Meaning of number 2, HDPE

The number 2 in the triangle at the bottom of the plastic bottle: HDPE high-density polyethylene, common used for medicine bottles, cleaning bottles, laundry detergent bottles, body wash bottles, shampoo bottles, disinfection bottles, plastic bags, etc.,It can withstand 110 ℃ high temperature. Plastic containers containing cleaning and bath products can be used after careful cleaning, but they are often not easy to clean and leave residues, thus becoming a breeding ground for bacteria, so it is not recommended to use them repeatedly for a long time.


Meaning of number 3, PVC

The number 3 in the triangle at the bottom of the plastic bottle: PVC polyvinyl chloride, common used for raincoats, building materials, plastic film, plastic boxes, pesticide bottles, etc., this kind of material has excellent plasticity and is cheap, so it is more commonly used. However, their heat-resistant temperature is low, and harmful substances may be released during high-temperature decomposition. They are even released during the manufacturing process. After toxic substances enter the human body with food, they may cause breast cancer, birth defects and other diseases in newborns. At present, containers of this material have been less used for packaging food.


Meaning of number 4, LDPE

The number 4 in the triangle at the bottom of the plastic bottle: LDPE polyethylene low-density polyethylene, common used for cling film, etc. Do not wrap the cling film on the surface of the food and put it into the microwave because its heat resistance is not strong. Usually, qualified PE cling film is encountered when the temperature exceeds 110°C, hot melting will occur, leaving some plastic preparations that cannot be decomposed by the human body. In addition, when food is wrapped with plastic wrap and heated, the fat in the food can easily dissolve harmful substances in the plastic wrap. Therefore, when food is put into the microwave oven, the wrapped plastic wrap must be removed first.


Meaning of number 5, PP

The number 5 in the triangle at the bottom of the plastic bottle: PP polypropylene, common ly used for soy milk bottles, yogurt bottles, juice drink bottles, microwave lunch boxes. With a melting point of 167°C, it is the only plastic box that can be placed in a microwave oven and can be reused after careful cleaning. It should be noted that some microwave lunch boxes, the box body is made of No. 5 PP, but the lid is not made of No. 5 PP, so it cannot be put into the microwave together with the box body. To be safe, remove the lid of the container before putting it in the microwave.


Meaning of number 6, PS

The number 6 in the triangle at the bottom of the plastic bottle: PS polystyrene, commonly used for bowls of instant noodle boxes and fast food boxes. Do not put it in a microwave oven to avoid the release of chemicals due to high temperature. After loading acids (such as orange juice) and alkaline substances, carcinogens will be decomposed. Avoid using fast food boxes to pack hot food. Don’t use the microwave to cook instant noodles in a bowl.


Meaning of number 7, PC

The number 7 in the triangle at the bottom of the plastic bottle: PC or other types, commonly used for water bottles, space cups, and baby bottles.It is easy to release the toxic substance bisphenol A, which is harmful to the human body. The water bottle marked with 7 must see whether there is a mark of BPA free (BPA free). Generally, merchants will mark it as a selling point. Found on the body or bottom of the bottle. Do not heat it when using it, and do not expose it to direct sunlight. The common drinking water plastic bottles on the market have been tested by the state and can be used safely.

In summary,  Consumers should try to avoid repeated use of aging and easily deteriorated plastic utensils, and it is best not to reuse beverage bottles for multiple times, otherwise bacteria will easily breed and there will be health risks.

Canvard Packaging Factory reminds consumers that when using plastic containers, they must read the numbers marked in the triangle at the bottom of the bottle. Only when they understand the properties of the materials can they be used in a suitable environment. What is especially important is that Plastic waste is returned to the furnace and recycled products.

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Why is the bottom of the plastic bottle recessed

Why is the bottom of the plastic bottle recessed

The bottom of the plastic bottle is recessed to allow the beverage bottle to stand firmer. If it is a flat-bottomed plastic bottle, it is easily deformed due to the hydraulic pressure, and it usually protrudes outward, so that the beverage bottle is not stable. However, if the bottom is designed in the shape of a groove, the stress area of ​​the bottom is increased, and the pressure is reduced, so that it is not easy to deform. And even if the entire bottom does not touch the table, as long as the force is uniform, it can stand very stably. The stability of the five-claw shape is very good, so a large part of the common plastic bottles are made into a five-claw shape. Plastic bottles are usually only disposable. If you use it to hold hot water, you will notice that it will deform and either bulge or shrink. In addition to becoming strangely shaped and difficult to stand, plastic products also release toxic substances at high temperatures.

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Flexible soft tube manufacturing process

Flexible soft tube manufacturing process

The process of making cosmetic plastic tube is also called tube extension, and the production equipment is called a pipe drawing machine in the factory. The printed rolling sheet goes through the following steps after entering the machine:

1. Trimming: According to the tube diameter to adjust the feeding width of the sheet so as to match the drawing rod.
2, Shaping: The sheet is flat,you have to use a special mold to turn it into roll shape.
3. High-frequency welding:The high-frequency machine starts to work after the tube sheet enters the position of the high-frequency welding knife. Then weld the front and back of the tube sheet together under a proper temperature. At this time, the tube sheet has become round.
4. Cursor Sensing: Use the light cursor to sense the cut pipe mark printed on the material, the machine can distinguish the length of the tube body of each tube. This step is very important.
5. Tube cutting: The last step is to use the cooperation of the cutter and the cursor sensor to cut the welded tube into a product of uniform length.

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Plastic cosmetic tube filling process

Plastic cosmetic tube filling process

General working principle: the neatly placed tube to be filled is automatically inserted into the positioning mold by the automatic feeding device from the large-capacity tube silo, and then the positioning mold rotates with the turntable and stays in different positions. On the workstation. Put the paste to be filled into the closable barrel, and accurately and automatically inject it through the plunger type quantitative filling valve directly connected to the barrel, intermittently staying in the tube on the filling station, the large plate Continue to rotate, and the tubes that have been filled with the material are quickly brought to different sealing stations, and the robots of each station immediately seal the tubes. Different filling capacities can be obtained by adjusting the capacity adjustment table. By replacing different manipulators, the two folded sides of the metal pipe such as aluminum pipe, three-folded side, saddle-shaped folded edge and the like can be completed, and the plastic pipe is completely plastic. The heat sealing of the composite pipe works. After the end of the seal, the typewriter automatically prints the date of production, production batch number and other words on the tail of the tube.

Matters needing attention: In the entire filling and sealing process, filling and sealing two stations are two very worthy of attention, because if they are not operated properly, it will directly lead to leakage of the product. When filling, the material body must not pollute the tube wall; the pressure on the equipment at the time of sealing and the temperature parameters should be properly selected. In advance, it is necessary to combine the processing window of the tube material to find and set the optimum state. Otherwise, the surface of the tube will be white, wrinkled, and the false seal will leak.

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Plastic bottle cap production process

Plastic bottle cap production process

Plastic bottle caps Generally speaking, the production process is roughly divided into two types: compression molding production process and injection molding production process.

The production process of the compression molding cover: the suction machine sucks the mixed material into the barrel of the compression molding machine, and after heating to the semi-melt plasticizing state in the barrel, quantitatively extrudes into the mold cavity, and the upper and lower molds are closed, Compression molding and cooling set, demoulding, and then through the ring cutting, padding, complete the production of compression molding.

The production process of the injection molding cap: the suction machine sucks the mixed material into the barrel of the injection molding machine, and after heating to the molten plastic state in the barrel, it is injected into the mold cavity, and is cooled and shaped in the cavity, and demoulded, and then After the ring is cut and padded, the production of the injection cap is completed.

The main difference between the two

  1. The injection mold is large in volume, and the replacement of a single cavity is troublesome; each cavity of the compression molding is relatively independent and can be replaced separately.
  2. The compression molding cap has no pouring point, so that it has a more beautiful appearance and better printing effect;
  3. Fill all the cavities once at the time of injection molding, and extrude one cap material at a time. The compression molding extrusion pressure is small, and the pressure required for injection molding is relatively high;
  4. the injection molding cover needs to heat the material to the molten flow state, the temperature is about 220 degrees; the compression molding cover only needs to be heated to about 170 degrees, and the energy consumption of the injection molding cover is higher than that of the compression molding cover;
  1. The compression molding processing temperature is lower, the shrinkage amount is small, and the cover size is more accurate.

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How to make plastic soft tube?

How to make plastic soft tube?

Plastic co extrusion cosmetic tubes take use of the co-extruding technology to squeeze the different kinds of raw material performance, and form at one time.

It can divided into single extrusion tube and multi layer extrusion tube(EVOH).

Single extrusion soft tube is used for the cosmetic brand who wants the good looking of the tube, and no have high quality requirement on the tube, like our hand cream and facial cream.

Multi layer soft tube is used for High-grade cosmetics packaging, or some products have strong function. Like food packaging and hair remover tube.

Advantages of multi layer soft tube:

  • Without the sealed edge, the appearanceof the tube is much better than the composite tube, that is why many high end cosmetics brands like to use this kind of tube.
  • According to the die orifice, It can produce different shape of squeezed tube, like oval shape, round shape, ultra flat tube etc.