DKB-10L MULTI-LAYER CO-EXTRUSION BLOW MOLDING MACHINE

bottle for edible oil, single-double color lubricants, single-double color cosmetics, 3 layer pesticide,
5 layer food. plastic volume in 0.5-12L.plastic material:PE、PP、PVC、PS、PC、
TPU、ABS、PA、EVA etc.

6 layer co-extrusion die head ON DKB-10L blow molding machine

Features

• HMI Touch Screen, Incorporating with PLC system (Optional Siemens/B&R Control) for easy maintenance.
• Blowing Unit/ Die Head movement for changing mold easily, as option.
• Built with safety devices to provide maximum protection for the machine operator.
• High plasticizing capacity extrusion screw is designed to handle material variations.
• Plasticizing screw and barrel is precision machined from special nitrogen treated steel.
• Water cooling technology controls feed zone temperature.
• Chiller circulated hydraulically controlled blow-pin.
• When requiring both functions in a single machine, purchase the machine for PVC application and order the additional parts (screw and die head ) for conversion to PE application.

Check this video to see how this machine works:

Application

20L Pesticide container

20L pesticide container drum

For any pesticide container,  a barrier layer to prevent pesticide seeps out from the container is a must. For barrier layer in the pesticide container, there are two main types of barrier layers, PA and EVOH. Widely used in pesticides, food industry. In the pesticide industry, it is mainly used to block the volatilization of pesticides. In the food industry, it is mainly to block the entry of external oxygen. One out and one in, these are the two most common uses. In addition, due to the high-gloss properties of EVOH, it can also be used in the cosmetic industry similar to the pearlescent layer.

Because EVOH or PA and PE cannot be directly bonded, a layer of glue is needed between EVOH and PE.

In the barrier properties, PE<PA<EVOH. But the anti-drop property of PA is slightly higher than EVOH. The most commonly used barrier layer is EVOH, which has excellent barrier properties and is harmless to the human body through various tests.

Pesticide industry: EVOH is commonly used for barrier layers in the pesticide industry. In the pesticide packaging of emulsifiers, at least three layers of packaging are required. The outer layer can be made of PE, the middle layer is glue, and the innermost layer is EVOH. However, the barrier properties of all barrier layers are reduced when exposed to water. Therefore, in water-solvent pesticide packaging, at least five layers of packaging are required, the first layer is PE material, the second layer is glue, the third layer is EVOH, the fourth layer is glue, and the fifth layer is PE. The role of PE in blocking water is sufficient to block water from EVOH. EVOH blocks the volatilization of pesticides. EVOH accounts for 3%-5% of the total material.

Food industry: The food industry is also commonly used in packaging with barrier layers. For example, ketchup will turn black if the barrier layer is not used for three months, and the barrier layer can be used for up to two years without discoloration. In addition, multi-layer packaging is also commonly used in the canning industry. Canned food requires a good oxygen barrier, otherwise it is easy to spoil the food inside. Although the tinplate packaging will not deteriorate, it is too heavy and opaque, and the bottle is easily deformed when it is dropped. So multi-layer plastic packaging is very common. The most commonly used in the food industry is five or six layers. Because EVOH passes the test and is harmless to the body. But food safety requirements are high, so PE is safer. Therefore, the barrier of food is generally packaged with at least five layers. The first layer is PE material, the second layer is glue, the third layer is EVOH, the fourth layer is glue, and the fifth layer is PE.

blow molding extrusion plastic bottles, jerry cans