Water-absorbing degradable plastic bag

A technology of plastic bags and superabsorbent resin, applied in the field of plastic bags for daily use, can solve the problems of easy breakage, easy leakage of liquid waste, lack of sufficient closure and sealing, etc., and achieve the effect of not being easily damaged

Inactive Publication Date: 2012-07-11
SHANGHAI CITY CHANGNING DISTRICT JUNIOR SCI &TECH GUIDANCE STATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is often some unpleasant soup dripping on the floor of the elevator room and corridor, which affects the cleanliness and beauty of the environment
[0003] Many consumers are currently using inexpensive single-use plastic trash bags that often simply hold liquid waste, are often designed not to hold liquids, lack adequate closure and airtight construction, and are very thin due to cost considerations ,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A plastic bag, the bottom of which is composed of a surface coating layer, a water-absorbing core layer and a plastic bag body from the inside to the outside, and the four sides of the surface coating layer are bonded to the plastic bag body by heating. The surface covering layer is non-woven fabric, and the water-absorbing core layer is a superabsorbent resin formed by grafting and copolymerizing starch and acrylic monomers.

[0019] The plastic bag body adopts polyethylene modified material and is prepared according to the following method:

[0020] 1. Add 55 parts of high-density polyethylene, 15 parts of polyethylene grafted maleic anhydride and 30 parts of corn starch into a high-speed mixer and mix evenly;

[0021] 2. Put the mixture obtained in step 1 into the twin-screw extruder for mixing. The twin-screw extruder has six sections in total. The temperature of each section of the twin-screw extruder is set as T1=170°C, T2=190°C, T3 =195°C, T4=200°C, T5=205°C, T6...

Embodiment 2

[0024] A plastic bag, the bottom of which is composed of a surface coating layer, a water-absorbing core layer and a plastic bag body from the inside to the outside, and the four sides of the surface coating layer are bonded to the plastic bag body by heating. The surface covering layer is non-woven fabric, and the water-absorbing core layer is a superabsorbent resin formed by grafting and copolymerizing starch and acrylic monomers.

[0025] The plastic bag body adopts polyethylene modified material and is prepared according to the following method:

[0026] 1. Add 58 parts of high-density polyethylene, 16 parts of polyethylene grafted maleic anhydride and 26 parts of corn starch into a high-speed mixer and mix evenly;

[0027] 2. Put the mixture obtained in step 1 into the twin-screw extruder for mixing. There are six sections in the twin-screw extruder. The temperature of each section of the twin-screw extruder is set as T1=180°C, T2=190°C, T3 =195°C, T4=200°C, T5=205°C, T6...

Embodiment 3

[0030] A plastic bag, the bottom of which is composed of a surface coating layer, a water-absorbing core layer and a plastic bag body from the inside to the outside, and the four sides of the surface coating layer are bonded to the plastic bag body by heating. The surface covering layer is non-woven fabric, and the water-absorbing core layer is a superabsorbent resin formed by grafting and copolymerizing starch and acrylic monomers.

[0031] The plastic bag body adopts polyethylene modified material and is prepared according to the following method:

[0032] 1. Add 50 parts of high-density polyethylene, 12 parts of polyethylene grafted maleic anhydride and 38 parts of corn starch into a high-speed mixer and mix evenly;

[0033] 2. Put the mixture obtained in step 1 into the twin-screw extruder for mixing. The twin-screw extruder has six sections in total. The temperature of each section of the twin-screw extruder is set as T1=170°C, T2=185°C, T3 =195°C, T4=205°C, T5=210°C, T6...

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PUM

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Abstract

The invention provides a water-absorbing degradable plastic bag. The bottom of the plastic bag comprises a surface wrapping layer, a water-absorbing core layer and a plastic bag body from inside to outside, wherein four edges of the surface wrapping layer are bonded with the plastic bag body by means of heating. As a highly water-absorbing resin layer is added to the bottom of an existing plastic bag and fixed to the bottom of the plastic bag through the surface wrapping layer, waste water in plastic flows down along the wall of the bag under the action of gravity, and is accumulated at the bottom of the bag and absorbed by the water-absorbing core layer, so that the whole plastic bag is kept dry, and food waste contained in the plastic bag is not easy to deteriorate and stink. Besides, by the aid of the added water-absorbing core layer and the surface wrapping layer, the bottom of the plastic bag, mainly used for bearing, is firmer and not easy to be damaged. The plastic bag body made of polyethylene modified materials can be naturally degraded, so that white pollution is reduced.

Description

technical field [0001] The invention relates to a plastic bag for daily use. Background technique [0002] At present, the garbage plastic bags used by many households to pack food waste often leak, especially liquid food waste. It is often some unpleasant soup dripping on the floor of the elevator room and corridor, which affects the cleanliness and beauty of the environment. [0003] Many consumers are currently using inexpensive single-use plastic trash bags that often simply hold liquid waste, are often designed not to hold liquids, lack adequate closure and airtight construction, and are very thin due to cost considerations , It is easy to break during use, causing liquid waste to leak more easily and destroying the living environment. And most plastic bags are not biodegradable, causing serious white pollution. [0004] In addition, the plastic bags used for packing boxes in the hotel are not tightly sealed, and the vegetable soup in the lunch box is easy to leak, a...

Claims

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Application Information

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IPC IPC(8): B65D30/08B65D65/46B32B27/12B32B27/08
CPCY02W90/10
Inventor 王汇然
Owner SHANGHAI CITY CHANGNING DISTRICT JUNIOR SCI &TECH GUIDANCE STATION
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