PVA foaming material and foaming method thereof

A foaming material and foaming agent technology, applied in the field of foaming materials, can solve the problems of PVA gasification, high production cost, complicated process, etc., and achieve the effects of high compressive strength, light weight and simple operation process

A foaming material and foaming agent technology, applied in the field of foaming materials, can solve the problems of PVA gasification, high production cost, complicated process, etc., and achieve the effects of high compressive strength, light weight and simple operation process

CN110669248AInactive Publication Date: 2020-01-10SRJJ LTD
0 Cites 4 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • PVA foaming material and foaming method thereof
  • PVA foaming material and foaming method thereof
  • PVA foaming material and foaming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First, prepare three groups of raw materials according to the following table, and prepare three groups of foaming samples:

[0013]

[0014]

[0015] Then, prepare three groups of foaming samples V20, V21 and V22 according to the following procedure: take PVA resin and deionized water, stir the mixture in a 90°C water bath for 2 hours, add foaming agent to the above mixture, and stir well . The temperature of the single-screw extruder is 80-100-105-110°C, the screw speed is 100rpm, and then the uniform solution is added to the single-screw extruder for pre-foaming. After pre-foaming, weigh 350g of pre-foaming samples and add Put the mold into a 200x200x23mm mold for the second foaming, then put the mold in a hot press at 100°C / 2 minutes, and finally put the mold in an oven at 60°C / 12 hours to get foamed V20, V21 and V22 PVA samples.

[0016] The solubility of described PVA resin provided by SRJJ company is the PVA resin of W grade; Foaming agent 031DU40 powder ...

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
compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a PVA foaming material and a foaming method thereof. The foaming material is provided to overcome the difficulty of continuous extrusion foaming of existing. The hydrolytic characteristic of the PVA is utilized to make the PVA foamed at a temperature lower than the boiling point of PVA in a hydrolytic swelling state. Water is used as a medium, a micro-porous expansion foaming agent is added in a swelling state, and foaming is carried out at the temperature below the boiling point of the PVA, so that PVA gasification is avoided, extrusion molding is realized, and the operation process is simple; and a prepared finished product has the advantages of light weight (low density), high compressive strength (reaching up to 259 KPa), high degradable component content and environmental friendliness.

Description

technical field [0001] The invention relates to a foaming material, in particular to a PVA foaming material and a foaming method thereof. Background technique [0002] Foamed polyvinyl alcohol (PVA) is an environmentally friendly foamed plastic. Traditional foamed plastics may pollute the environment during use because they cannot be degraded. In some fields, it has been clearly prohibited to use. Foamed PVA is a biodegradable polymer material in the natural environment, and PVA itself contains hydroxyl groups and open-pore structure, so it has excellent water absorption performance, hard and high strength in dry state, and good flexibility in wet state , are widely used in many fields. The preparation of PVA foam mainly includes extrusion molding and compression molding, and the methods of foaming generally include chemical foaming method, physical foaming method and mechanical foaming method. Among them, the disadvantages of compression molding are high production cost, ...

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
10 Jan 2020
Publication
CN110669248A
IPC
C08J9/32; C08L29/04
CPC
C08J9/32; C08J2329/04; C08J2203/22; C08J2205/044
Inventors
陈奕辉