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With polyethylene as raw material and starate biodegradable masterbatches as additive, a kind of biodegradable mulch is obtained through extrusion and blowing. The applied biodegradable mulch has the same functions as plain polyethylene ground film, such as increasing production, moisture keeping and soil moisture content conservation. In the meantime, according to different weather conditions and areas as well as usage requirements for various crops, the formulas can be adjusted in line with local conditions and the induced period of degradation & degradation rate can be controlled effectively. The physical property indexes of biodegradable ground film containing 40% masterbatches are as follows:

>>>PHYSICAL PROPERTY OF BIODEGRADABLE GROUND FILM

INDEXES

ITEM

Product thickness 0.020mm

Product thickness
0.014mm

Product thickness
0.012mm

Product thickness
0.008mm

Quality

Grade A

Quality

Grade A

Quality

Grade A

Quality

Grade A

 

Qualified

 

Qualified

 

Qualified

 

Qualified

 Tensile load N,
longitudinal,transverse=

2.5

2.3

2.0

1.7

1.6

1.3

1.3

1.0

 Elongation at break %, longitudinal,transverse=

220

180

200

150

160

120

120

100

Right angle tearing load N,longitudinal,transverse=

1.0

0.9

0.8

0.7

0.6

0.5

0.5

0.4

Indexes of biodegradable ground film with 60% masterbatches & thickness of 0.02mm are as follows:

>>>BIODEGRADABLE AGRICULTURAL GROUND COVERAGE FILM
No.  EVALUATION ITEM  TEST METHOD   UNIT  INDEXES
1  Thickness  GB/T6672  um  20±2
2  Density  GB/T1033 Method B  g/cm3  1.02
3  Fog density  GB/T2410-89  %  84.1
4  Melting point  GB/T13464-92  °C  117
5  Ash content  550°C,2 HRs scorching  %  0.14
6  Tensile load  GB/T13022-91  N  Longitudinal2.9
Transverse2.3
7  Elongation at break  GB/T13022-91  %  Longitudinal530
Transverse760
8  Right angle tearing load  QB/T1130-91  N  Longitudinal1.1
Transverse1.7
9  Cadmiun content in material quality  Atom absorption  ppm  <0.5
10  Lead content in material quality  Atom absorption  ppm  <1
11  Heavy metal dissolved out(calculated per pb)  GB/T5009.60-1996  ppm  <1
12  Consumption of potassuim permanganate  GB/T5009.60-1996  mg/l  1.58
13  Biodegradation rate  ASTMD5338-92  %  37.10
14  Quality variation rate  ASTMD5338-92  %  13.23
 
 

Starate Biodegradative Masterbatches

Degradative Polyethylene Agricultural Ground Coverage Film

Degradative Polyethylene Blown Film Product for Packages

Shopping Bag

Flat-mouth Bag

Rolling bag

Garbage Bag

Bag with a Loop

8-fold Rolling Bag

Bag with a Slot on Top

Sheet Products for Plastics-Sucking

Seedings Raisings Bowls

Case for Chopsticks

 
 


 

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