Blown Film Extrusion Introduction

Blown Film Extrusion Introduction
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags. Usually polyethylene is used with this process, and other materials can be used as blends with these polymers. A diagram of a polyethylene chain is shown in Figure 1 to the right.
Background Theory on Polymers

In the cooling step of blown film extrusion, the amorphous, transparent melt crystallizes to form a translucent, hazy, or opaque film. The point where opacity begins in the bubble is known as the frost line. 
Fig 1: Model of polytheylene chain frompolyethylene Wikipedia article.The frost line height is controlled by several parameters: the air flow, film speed, and temperature difference between the film and the surroundings. Properties of the film, such as tensile strength, flexural strength, toughness, and optical properties, drastically change depending on the orientation of the molecules. As the transverse or hoop direction properties increase, the machine or longitudinal direction properties decrease. For instance, if all the molecules were aligned in the machine direction, it would be easy to tear the film in that direction, and very difficult in the transverse direction.

The Film Blowing machine Process

Fig 2: Schematic of set-up from User:J.Chiang.

Typically, blown film extrusion is carried out vertically upwards, however horizontal and downward extrusion processes are now becoming more common. Figure 2 shows a schematic of the set-up for blown film extrusion. This procedure consists of four main steps: The polymer material starts in a pellet form, which are successively compacted and melted to form a continuous, viscous liquid. This molten plastic is then forced, or extruded, through an annular die. Air is injected through a hole in the center of the die, and the pressure causes the extruded melt to expand into a bubble. The air entering the bubble replaces air leaving it, so that even and constant pressure is maintained to ensure uniform thickness of the film. The bubble is pulled continually upwards from the die and a cooling ring blows air onto the film. The film can also be cooled from the inside using internal bubble cooling. Read more “Blown Film Extrusion Introduction”

Blown Film Extrusion Introduction

Blown Film Extrusion Introduction
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags. Usually polyethylene is used with this process, and other materials can be used as blends with these polymers. A diagram of a polyethylene chain is shown in Figure 1 to the right.
Background Theory on Polymers

In the cooling step of blown film extrusion, the amorphous, transparent melt crystallizes to form a translucent, hazy, or opaque film. The point where opacity begins in the bubble is known as the frost line. 
Fig 1: Model of polytheylene chain frompolyethylene Wikipedia article.The frost line height is controlled by several parameters: the air flow, film speed, and temperature difference between the film and the surroundings. Properties of the film, such as tensile strength, flexural strength, toughness, and optical properties, drastically change depending on the orientation of the molecules. As the transverse or hoop direction properties increase, the machine or longitudinal direction properties decrease. For instance, if all the molecules were aligned in the machine direction, it would be easy to tear the film in that direction, and very difficult in the transverse direction.

The Film Blowing machine Process

Fig 2: Schematic of set-up from User:J.Chiang.

Typically, blown film extrusion is carried out vertically upwards, however horizontal and downward extrusion processes are now becoming more common. Figure 2 shows a schematic of the set-up for blown film extrusion. This procedure consists of four main steps: The polymer material starts in a pellet form, which are successively compacted and melted to form a continuous, viscous liquid. This molten plastic is then forced, or extruded, through an annular die. Air is injected through a hole in the center of the die, and the pressure causes the extruded melt to expand into a bubble. The air entering the bubble replaces air leaving it, so that even and constant pressure is maintained to ensure uniform thickness of the film. The bubble is pulled continually upwards from the die and a cooling ring blows air onto the film. The film can also be cooled from the inside using internal bubble cooling. Read more “Blown Film Extrusion Introduction”

Plastic Bag Making Machine

1.Plastic bag making machine is suitable for high density polyethylene (HDPE), the low density gathers alkene (LDPE) plastic film material.which is produces the plastic film to flat bag, 2. the performance of Plastic bag making machine is stable, the back cover is reliable, is the large, medium and small processed foods enterprise is most economical appropriately, bag sealing&cutting system equipment.  Double Lines Plastic Bag making Machine Plastic bag making machine Technical Parameter :
1.control by PLC
2.machine with photocell,can make printed bag and unprinted bag
3.suit to produce flat open bag,T-shirt bag,patch bag,rolling bag,garbage bag,trash bag.
4.with account device
5.speed control by inverter
6.bag width from 10mm to 2000mm.

plastic flat open bagplastic T-shirt bagTrash bag,garbage bag

Kingdom Machine Co.,ltd 
Mobile:0086-13088651008
Whatsapp/Viber/Tango:+86-13088651008 
Tel.:0086-577-66881211;      Fax:0086-577-66881311
Whatsapp:0086-13958812663 
www.kingdommachine.com 
Kingdombillwang@hotmail.com ,
 kingdombillwang@yahoo.com 
 
Skype:Kingdombillwang
Ruian Economic Zone,Wenzhou,China 325200 
Read more “Plastic Bag Making Machine”

Stretch Film Machine

double layer stretch film machine
double layer stretch film machine
Automatic Stretch Film Rewinding Machine

 Double layer stretch film machine uses LLDPE as main material and adopts several kinds of resins to manufacture the single/double-side self-sticky stretch wrapping film. The film has good tensile strength,anti-pricking ability and impact strength. Its good shrinking memory function and self-sticky can make goods integrity to prevent goods from loosening and collapsing during transportation and being polluted by dust. The transparency and tensile strength of this product can make the packaging beautiful, economical and practical. The film can be widely used in wrapping of palletized goods. Its a good substitute for hot shrinking packaging film during transportation.   Technical Parameter:
Item/Model KD-500*2 KD-1000*2 Screw diameter(mm) 55*2 65 *2 L/D ratio of screw (L/D) 28:1 28:1 width of die head (mm) 650 1250 Width of finished products(mm) 500(250*2rollers) 1000(500*2rollers) Thickness of finished products (mm) 0.017-0.05 0.017-0.05 Structure of film layers A/B A/B Max output (kg/h) 40 100 Linear speed of machinery (m/min) 10-120 50-100 Total power (KW) 50 140 Overall dimensions (L*W*H)m 6*1.5*2.5 10*4*3 Weight (T)(About) 3 8 Optional Equipment:   1) Auto loader  2) Auto dry hopper  3) Motorize net changer  4) Hydraulic net changer  5) Air shaft  6) gule pump
   
           

CE Certificate

Kingdom Machine co.,ltd team professional produce rotogravure printing machine, blown film lines, blown film extrusion,bag making machine,flexo printing machine,stretch film machine,bubble film machine,recycle machine for over 15 years.

Kingdom Machine co,ltd
Mobile:0086-13088651008 

mobile:0086-13566179950
 kingdombillwang@hotmail.com 

kingdombillwang@yahoo.com 
http://www.gravureprintingmachine.com
http://www.blown-film-extruder.com
Ruian Economic Zone,Wenzhou,China 325200
 Tel.:0086-577-65127709

Fax:0086-577-56848008
Skype:kingdombillwang 

whatsapp:0086-13088651008
 viber:0086-13088651008

Tango:0086-13088651008
Read more “Stretch Film Machine”

Stretch Film Machine

double layer stretch film machine
double layer stretch film machine
Automatic Stretch Film Rewinding Machine

 Double layer stretch film machine uses LLDPE as main material and adopts several kinds of resins to manufacture the single/double-side self-sticky stretch wrapping film. The film has good tensile strength,anti-pricking ability and impact strength. Its good shrinking memory function and self-sticky can make goods integrity to prevent goods from loosening and collapsing during transportation and being polluted by dust. The transparency and tensile strength of this product can make the packaging beautiful, economical and practical. The film can be widely used in wrapping of palletized goods. Its a good substitute for hot shrinking packaging film during transportation.   Technical Parameter:
Item/Model KD-500*2 KD-1000*2 Screw diameter(mm) 55*2 65 *2 L/D ratio of screw (L/D) 28:1 28:1 width of die head (mm) 650 1250 Width of finished products(mm) 500(250*2rollers) 1000(500*2rollers) Thickness of finished products (mm) 0.017-0.05 0.017-0.05 Structure of film layers A/B A/B Max output (kg/h) 40 100 Linear speed of machinery (m/min) 10-120 50-100 Total power (KW) 50 140 Overall dimensions (L*W*H)m 6*1.5*2.5 10*4*3 Weight (T)(About) 3 8 Optional Equipment:   1) Auto loader  2) Auto dry hopper  3) Motorize net changer  4) Hydraulic net changer  5) Air shaft  6) gule pump
   
           

CE Certificate

Kingdom Machine co.,ltd team professional produce rotogravure printing machine, blown film lines, blown film extrusion,bag making machine,flexo printing machine,stretch film machine,bubble film machine,recycle machine for over 15 years.

Kingdom Machine co,ltd
Mobile:0086-13088651008 

mobile:0086-13566179950
 kingdombillwang@hotmail.com 

kingdombillwang@yahoo.com 
http://www.gravureprintingmachine.com
http://www.blown-film-extruder.com
Ruian Economic Zone,Wenzhou,China 325200
 Tel.:0086-577-65127709

Fax:0086-577-56848008
Skype:kingdombillwang 

whatsapp:0086-13088651008
 viber:0086-13088651008

Tango:0086-13088651008
Read more “Stretch Film Machine”

Drinking straw machine extrusion

Drinking Straw Making Machine data
drinking straw machinePP drinking straw

Polypropylene Drinking straw making machine extrusion have 1 color, 2 colors,3 colors,4 colors,5 colors
drinking straw diameter from 3mm to 15mm.
Suit market:Drinking bar,milk drinking straw,cocktail stir straws,cocktail drinking straws,cofa bar,Lollipop.

This model is a tube extrusion line, composed of extruder and die ,Vacuum calibration and cooling unit,haul-off unit, rotary cutter unit, The series machines can produce all kinds of drinking straw,spiral strip straw,medical pipe, all the machine’s controls base with the control elements ergonomically adapted to permit easy operation.

TECHNICAL FEATURE

1.The extrusion die can be special designed and easy exchanged to produce pipe and shaping stuff,
2.Water bath in stainless steel can be adjusted in three planes ,
3.The haul-off unit can be belt or rollers, it is customizable.
4.Fitted with single or double rotary cutter .

Video of drinking straw making machine
Kingdom Machine Co.,ltd
Tel.:0086-577-66881211;      Fax:0086-577-66881311
Mobile:0086-13088651008;       
Whatsapp:0086-13958812663;

www.kingdommachine.com;
sale@kingdommachine.com;
Whatsapp/Viber/Tango:+86-13088651008
Skype:Kingdombillwang
Ruian Economic Zone,Wenzhou,China 325200 

Read more “Drinking straw machine extrusion”

Bubble Film Machine

Three layers Air Bubble Film Machine

bubble film machine
  air bubble film sheet

This aircrew adopts the disposable shaping craft. it is our company that draws domestic and inter national advanced technology extensively,through a great deal of production practices in having ordinary equipment originally, develop, designing,Can produced polyethylene compound bubble (cushion)membrane in succession.designs science,practical,rational in structure of the machine. 

1. This model can produce 2-3 layer bubble film.
2.  Suitable for a wide spectrum of material including
     LDPE , LLDPE and recycled PE.   
3. Bubble size from diameter of    6mm to    32mm,
    according to requirement.
4. Automatic winder optional, which could greatly
    improve production efficiency.

Main Technical Variables:Model

KDPEG-1000 KDPEG-1200 KDPEG-1500 KDPEG-2000

Main&minor Screw Dia.60mm/50mm 65mm/55mm 85mm/65mm 95mm/70mm

Film width:1000mm 1200mm 1500mm 2000mm

Output:120kg/h 160kg/h 180kg/h 250kg/h

L/D:28:1 28:1 28:1 28:1 

Optional equipment:
1) Auto loader
2) Automatic change roller
3) Air shaft


Kingdom Machine co.,ltd team professional produce Plastic Bag Machine,Automatic T-shirt bag making machine,film blowing machine,blown film extrusion,flexo printing machine,stretch film machine,bubble film machine,recycle machine for over 15 years.

Most of our machines export to South Africa,Chlie, brazil, Colombia, Argentina, Peru, Venezuela, Uruguay, Surinam, mexico Egypt, iran, Isrel, bahrain, Cyprus, Iraq, Jordan, Kuwait, Lebanon, Oman, Qata, Saudi Arabia, Syria, Turkey,Nigeria, iran, dubai, south amrica, and other parts of the world. “Kingdom” insists to make machines with simple design, guest first.

Kingdom Machine co,ltd Ruian Economic Zone,Wenzhou,China 325200
Tel:0086-13088651008
Tel:0086-13566179950

Tel.:0086-577-65127709
Fax:0086-577-56848008

sale@kingdommachine.com
kingdombillwang@hotmail.com
kingdombillwang@yahoo.com
http://www.kingdommachine.com 
Skype:kingdombillwang
whatsapp/viber/tango:+86-139-58812663
Read more “Bubble Film Machine”

Plastic Bag Machine

Plastic Bag Machine
Side sealnig machine
Side sealing Bag Making Machine is suitable for heat-sealing and heat cutting such materials as BOPP,OPP the rmalcontracting films,etc.And it is a kind of ideal equipment for making socks bag,towel bag,bread bag and cloth bag,mailing bag,express bag etc.The machine has such characteristics as length flxing by computer,photoelectric tracking,stable performance(cast iron structure) and high speed,etc.And has such functions as automatic gluing,automatic punching and lace heat-sealing,etc.  

Main Technical Variables:
 

Model RQL-600 ;RQL-800 ;RQL-1000
Width of sealing & cutting 580mm ;780mm ;980mm
Length of sealing &cutting 999mm ;999mm; 999mm
Speed of bag-making 40-240pc/min
Power of motor 3kw ;7kw; 10kw
Weight 700kg; 850kg; 950kg


Kingdom Machine co.,ltd team professional produce Plastic Bag Machine,Automatic T-shirt bag making machine,film blowing machine,blown film extrusion,flexo printing machine,stretch film machine,bubble film machine,recycle machine for over 15 years.

Most of our machines export to South Africa,Chlie, brazil, Colombia, Argentina, Peru, Venezuela, Uruguay, Surinam, mexico Egypt, iran, Isrel, bahrain, Cyprus, Iraq, Jordan, Kuwait, Lebanon, Oman, Qata, Saudi Arabia, Syria, Turkey,Nigeria, iran, dubai, south amrica, and other parts of the world. “Kingdom” insists to make machines with simple design, guest first.

Kingdom Machine co,ltd Ruian Economic Zone,Wenzhou,China 325200
Tel:0086-13088651008
Whatsapp:0086-13566179950

Tel.:0086-577-65127709
Fax:0086-577-56848008

kingdombillwang@hotmail.com
kingdombillwang@yahoo.com
www.kingdommachine.com
Skype:kingdombillwang
Read more “Plastic Bag Machine”

Plastic bag machine

Automatic Plastic Shopping Bag Machine

Automatic Plastic Shopping Bag Machine

Plastic Bag Machine is applied to manufacturing and printing the uncolored vest bags(shopping bag) made of HDPELDPE roll plastic film. It adopts PLC control, double step motor fixed length and the liquid crystal touch screen actual display to finish the feeding, sealing, cutting, punching holes and transporting only in one process. It is of high degree of automation and good economic result.

This machine with two photocell,two driver,two knife,can make two different bag at same time.

Plastic shopping bag  
Main Technical Variables:    Model DFHQ-350*2 DFHQ-450*2 Max. Bag-making width 300mm*2 400mm*2Max.Bag-making length 600mm 600mm Bag-making thickness 0.015-0.035mm 0.015-0.035mm Bag-making speed 140-200pcs/min*2 140-200pcs/min*2 Air pressure 5kg/cm2 5kg/cm2 Total Power 7kw 9kw Weight of machine 1400kg 1600kg Overall dimensions 6000*1400*1600mm 6000*1600*1600mm

Kingdom Machine co,ltd Mobile::0086-13088651008 
Mobile: 0086-13566179950 Tel.:0086-577-65127709 
Fax:0086-577-56848008 kingdombillwang@yahoo.com
sale@kingdommachine.com  
Skype:kingdombillwang 
http://www.blown-film-extruder.com
Ruian Economic Zone,Wenzhou,China 325200… Read more “Plastic bag machine”

Blown Film Extrusion Introduction

Blown Film Extrusion Introduction
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags. Usually polyethylene is used with this process, and other materials can be used as blends with these polymers. A diagram of a polyethylene chain is shown in Figure 1 to the right.
Background Theory on Polymers

In the cooling step of blown film extrusion, the amorphous, transparent melt crystallizes to form a translucent, hazy, or opaque film. The point where opacity begins in the bubble is known as the frost line. 
Fig 1: Model of polytheylene chain frompolyethylene Wikipedia article.The frost line height is controlled by several parameters: the air flow, film speed, and temperature difference between the film and the surroundings. Properties of the film, such as tensile strength, flexural strength, toughness, and optical properties, drastically change depending on the orientation of the molecules. As the transverse or hoop direction properties increase, the machine or longitudinal direction properties decrease. For instance, if all the molecules were aligned in the machine direction, it would be easy to tear the film in that direction, and very difficult in the transverse direction.

The Film Blowing machine Process

Fig 2: Schematic of set-up from User:J.Chiang.

Typically, blown film extrusion is carried out vertically upwards, however horizontal and downward extrusion processes are now becoming more common. Figure 2 shows a schematic of the set-up for blown film extrusion. This procedure consists of four main steps: The polymer material starts in a pellet form, which are successively compacted and melted to form a continuous, viscous liquid. This molten plastic is then forced, or extruded, through an annular die. Air is injected through a hole in the center of the die, and the pressure causes the extruded melt to expand into a bubble. The air entering the bubble replaces air leaving it, so that even and constant pressure is maintained to ensure uniform thickness of the film. The bubble is pulled continually upwards from the die and a cooling ring blows air onto the film. The film can also be cooled from the inside using internal bubble cooling. Read more “Blown Film Extrusion Introduction”