Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of degradable plastic bag and preparation method thereof

A technology of plastic bags and raw materials, which is applied in the field of degradable plastic bags and its preparation, can solve the problems of poor interface compatibility, poor mechanical properties and poor flexibility of degradable plastic bags, so as to accelerate the degradation rate, reduce mechanical weak points, Effect of improving tensile strength

Active Publication Date: 2022-07-22
深圳市正旺环保新材料有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors found that polylactic acid has defects such as too hard texture and poor flexibility. The compound use of plant starch, hydroxyethyl cellulose and polylactic acid can improve the defects of polylactic acid that is too hard and poor flexibility. However, plant starch and hydroxyethyl cellulose Vein is a hydrophilic substance, while polylactic acid is a hydrophobic substance. The interface compatibility between plant starch, hydroxyethyl cellulose and polylactic acid is poor, resulting in poor mechanical properties of degradable plastic bags.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of degradable plastic bag and preparation method thereof
  • A kind of degradable plastic bag and preparation method thereof
  • A kind of degradable plastic bag and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0038] A silane coupling agent-modified starch is prepared according to the following steps: Weigh 1 kg of corn starch, place it in an oven, dry it at 130° C. for 1.5 hours, cool it to room temperature (the room temperature in this application is all 25° C.), put the The corn starch was ultrasonically oscillated at an ultrasonic frequency of 30 kHz for 20 min; 1 kg of silane coupling agent KH-550 was added, the temperature was raised to 70 °C, and the reaction was kept for 1 h at a stirring speed of 1200 rpm. After the reaction, the silane coupling agent modified starch was obtained. The starch is packed in a sealed bag and placed in a desiccator to cool for later use.

preparation example 2-3

[0040] A silane coupling agent modified starch is different from Preparation Example 1 in that the weight ratio of the silane coupling agent to the starch is different, and the specific weight ratio is shown in Table 2 below.

[0041] Table 2. Weight ratio of silane coupling agent and starch

[0042] Preparation example Weight ratio of starch and silane coupling agent Preparation Example 1 1:0.1 Preparation Example 2 1:0.2 Preparation Example 3 1:0.3

preparation example 4-5

[0044] A silane coupling agent modified starch is different from Preparation Example 2 in that the preparation process parameters of the silane coupling agent modified starch are different, and the specific parameters are shown in Table 3 below.

[0045] Table 3. Weight ratio of silane coupling agent and starch

[0046] Preparation example Ultrasonic frequency / kHz Ultrasound time / min Reaction temperature of starch and silane coupling agent / ℃ Insulation reaction time / h Preparation Example 1 30 20 70 1 Preparation Example 4 40 10 70 1 Preparation Example 5 40 10 90 2

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a degradable plastic bag and a preparation method thereof. A degradable plastic bag is prepared from the following raw materials by weight: 80-120 parts of polylactic acid, 30-40 parts of rosin ester, 15-35 parts of silane coupling agent modified starch, 10-30 parts of kaolin, coffee 5 to 15 parts of residues; this application improves the toughness of degradable plastic bags by modifying starch with rosin ester and silane coupling agent, and kaolin and coffee grounds can promote the dispersibility between the various polymers and reduce the degradable plastic bags. Mechanical weak point, improve the tensile strength of degradable plastic bags, and improve the mechanical properties of degradable plastic bags. At the same time, kaolin and coffee grounds provide nutrients for microorganisms, accelerate the degradation rate of degradable plastic bags, and improve the performance of degradable plastic bags. degree of degradation.

Description

technical field [0001] The invention relates to the technical field of plastic bags, in particular to a degradable plastic bag and a preparation method thereof. Background technique [0002] Traditional PE plastic bags bring convenience to our lives, but PE plastics are stable in structure, not easy to degrade, and do not decompose for a long time in the natural environment, which will cause great harm to the environment. With the development of science and technology and the development of China's environmental protection industry, degradable plastic bags have gradually replaced traditional PE plastic bags. Degradable plastic bags refer to a type of plastic bags whose various properties can meet the requirements of use, remain unchanged during the storage period, and can be degraded into environmentally harmless plastic bags under natural conditions after use. [0003] Degradable plastic bags are mainly composed of polylactic acid (PLA), regenerated cellulose, starch plast...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L93/04C08L3/04C08L91/00C08L97/02C08L5/14C08K3/34
CPCC08L67/04C08L2205/035C08L2201/06C08K2201/005C08L93/04C08L3/04C08L91/00C08L97/02C08L5/14C08K3/346
Inventor 郑瑞恋徐志彬郑宝如张坚洪
Owner 深圳市正旺环保新材料有限公司