A method for preparing transparent, antifreeze and flame retardant polyvinyl alcohol film

A technology of polyvinyl alcohol film and polyvinyl alcohol powder, which is applied in the direction of coating, can solve the problems of difficult thermoplastic processing, flame retardant and anti-freezing properties, etc., to improve the thermoplastic film-forming and appearance, and maintain transparency. , to avoid the effect of bubbles
CN103709567BActive Publication Date: 2016-09-28YONGAN SYF WATER SOLUBLE FILMS
10 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YONGAN SYF WATER SOLUBLE FILMS
Publication Date
2016-09-28

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for preparing a transparent, antifreezing and flame retardant polyvinyl alcohol film. The method comprises the following steps: physically mixing polyvinyl alcohol powder with a modification additive containing an ionic liquid uniformly according to a weight ratio of (70 / 30)-(90 / 10); injecting the mixture into a twin-screw extruder with a heating device, then carrying out melt extrusion on the mixture at 160-180 DEG C and enabling the melt time of the mixture in the twin-screw extruder to be 8-12 minutes by adjusting the screw speed; cooling and granulating the extruded melt in the air; and injecting the obtained granules into a single-screw extruder with a heating device to form the film by blow molding, curtain coating or calendering at 180-200 DEG C. The ionic liquid adopted in the method carries out hydrogen bond complexing with polyvinyl alcohol in the thermoplastic processing course, so that the prepared polyvinyl alcohol film has high transparency, antifreezing property and flame retardance and has application advantages in the fields of packaging, building materials and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of macromolecular materials, and in particular relates to a method for preparing a transparent, frost-resistant and flame-retardant polyvinyl alcohol film. Background technique

[0002] Polyvinyl alcohol (PVA) is a water-soluble degradable polymer material with excellent performance and wide range of uses. It is widely used in coatings, adhesives, fibers and other industries. In recent years, PVA film has developed rapidly, with an average annual growth rate of more than 8% in the world. PVA film has excellent biodegradability, gas barrier property, water solubility, high transparency, oil resistance, antistatic and mechanical properties, and has significant application advantages in packaging, building materials and other fields.

[0003] my country is a big country in the production and consumption of PVA, but its application is excessively concentrated in the fields of coatings and adhesives, and it lags behind Ja...

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