Water-resistant PVA film and preparation method thereof

A film and inner layer technology, applied in the field of water-resistant PVA film and its preparation, can solve the problems of not utilizing the relevant mechanical properties of PVA, and achieve the effect of reducing thickness and high water resistance

Active Publication Date: 2020-04-07
江门市新构思环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect described by this patented technology relates to improving the durability or weatherproof properties of films made from polyvinyl alcohol resin(PVOH). These improvements include improved strength against tearing due to moisture absorption, reduced costs associated with manufacturing processes, increased flexibility when applying pressure sensitive materials like labels onto them, prevention of damage caused by external factors like sunlight exposures, and reduction of environmental concerns related to disposal of waste products containing these polymers.

Problems solved by technology

This patents discusses various technical problem addressed during the development phase of new types of plastics called hydrocrack resistant polymer that meets specific conditions such as high humidity environments while maintaining durability over longer periods of exposure. Current solutions involve modifying the chemical composition of the resin itself but fail due to poor weather resistance. To address this issue, there needs an effective way to create a strong yet flexible barrier film made up entirely of recycled waste products like paper pulp.

Method used

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  • Water-resistant PVA film and preparation method thereof
  • Water-resistant PVA film and preparation method thereof
  • Water-resistant PVA film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A water-resistant PVA film, the front and back surfaces of the water-resistant PVA film are coated with two layers of RTV, which are respectively an inner layer RTV and an outer layer RTV.

[0069] Wherein the inner layer RTV belongs to the RTV of the deacetate type, and is made by the following components in parts by mass:

[0070]

[0071] 0.05 parts of tert-butyl titanate;

[0072] Among them, the Among them, n is 10 and is terminated with a hydroxyl group.

[0073] Wherein the outer layer RTV belongs to the RTV of the acetone-removing type, and is made from the following components in parts by mass:

[0074]

[0075] 0.2 parts of dibutyltin diacetate;

[0076] Among them, the Among them, n is 100, and it is terminated with a hydroxyl group.

[0077] The preparation method of the above-mentioned water-resistant PVA film may further comprise the steps:

[0078] (1) Coupling agent formula is coated on the PVA film surface, and described coupling agent formul

Embodiment 2

[0089] A water-resistant PVA film, the front and back surfaces of the water-resistant PVA film are coated with two layers of RTV, which are respectively an inner layer RTV and an outer layer RTV.

[0090] Wherein the inner layer RTV belongs to the RTV of the dealcoholization type, and is made from the following components in parts by mass:

[0091]

[0092] 0.2 parts of dibutyltin dilaurate;

[0093] Among them, the n is 100 and is terminated with a hydroxyl group.

[0094] Wherein the outer layer RTV belongs to the RTV of the deketoxime type, and is made from the following components in parts by mass:

[0095]

[0096] 0.2 parts of dibutyltin dilaurate;

[0097] Among them, the Among them, n is 100, and it is terminated with a hydroxyl group.

[0098] The preparation method of the above-mentioned water-resistant PVA film may further comprise the steps:

[0099] (1) Coupling agent formula is coated on the PVA film surface, and described coupling agent formula has fo

Embodiment 3

[0110] A water-resistant PVA film, the front and back surfaces of the water-resistant PVA film are coated with two layers of RTV, which are respectively an inner layer RTV and an outer layer RTV.

[0111] Wherein the inner layer RTV belongs to the RTV of the deketoxime type, and is made from the following components in parts by mass:

[0112]

[0113] 0.1 part of dibutyltin dilaurate;

[0114] Among them, the Among them, n is 50 and is terminated with a hydroxyl group.

[0115] Wherein the outer layer RTV belongs to the RTV of the acetone-removing type, and is made from the following components in parts by mass:

[0116]

[0117] 0.1 part of dibutyltin diacetate;

[0118] Among them, the Among them, n is 70, and is terminated with a hydroxyl group.

[0119] The preparation method of the above-mentioned water-resistant PVA film may further comprise the steps:

[0120] (1) Coupling agent formula is coated on the PVA film surface, and described coupling agent formula h

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Abstract

The invention relates to a water-resistant PVA film, the front and back surfaces of which are both coated with two layers of RTV, i.e. an inner layer RTV and an outer layer RTV respectively. Specifically, the inner layer RTV and the outer layer RTV are prepared from the following components by mass: 80-100 parts of polysiloxane; 2-4 parts of a cross-linking agent; and 0.05-0.2 part of a catalyst;the types of the inner layer RTV and the outer layer RTV are respectively selected from deacetic acid type RTV, deketoxime type RTV, dealcoholization type RTV, deacetone type RTV or deamidation type RTV, and the inner layer RTV and the outer layer RTV are different. The water-resistant PVA film adopted by the invention has excellent water resistance, the tensile properties of PVA are not obviouslyreduced after long-time water immersion compared with that before water immersion, and the tensile strength variation after water immersion is obviously lower than that of other similar products; also the water-resistant PVA film has good stability, does not have defect points due to shrinkage and cracking along with changes of the external environment; and the storage, transportation and use environments are relatively loose.

Description

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Claims

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Application Information

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Owner 江门市新构思环保科技有限公司
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