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A kind of low precipitation PVC protective film and preparation method thereof

A technology of protective film and anti-aging agent, applied in the direction of film/sheet adhesive, non-polymer adhesive additive, adhesive type, etc. The environmental hazards of production line workers and other problems have achieved the effects of simple preparation method, time saving, low plasticizer precipitation rate, and excellent anti-aging performance.

Active Publication Date: 2021-11-09
广东硕成科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, the plasticizer in PVC is easy to precipitate with the prolongation of use time and the change of the environment, and adheres to the surface of the circuit board, making the performance of the PVC film deteriorate, which not only seriously affects the use function of the circuit board, but also affects the production line. workers, serious hazards to the environment
In addition, circuit boards are mostly used in environments with strong light and high temperature, and the existing PVC materials are prone to aging and deterioration under such conditions, which affects the service life of circuit boards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] The second aspect of the present invention provides a kind of preparation method of low precipitation PVC protective film, comprises the steps:

[0050] 1. Put the raw materials for the preparation of the adhesive layer in a reaction kettle at 200-260°C for 7-9 hours in a closed reaction.

[0051] 2. After the reaction, the raw materials for the preparation of the adhesive layer are passed through a 100-150 mesh sieve, and the raw materials for the preparation of the adhesive layer after sieving are evenly spread on the surface of the PVC substrate by the coating method, and dried at 50-100 ° C.

[0052] 3. Paste the release paper layer on the surface of the raw material for the preparation of the adhesive layer, and cut it into the desired shape with a slitting machine to obtain a low-separation PVC protective film.

Embodiment 1

[0070] The first aspect of embodiment 1 provides a kind of low-separation PVC protective film, and the protective film is followed by a release paper layer, an adhesive layer and a PVC base material from top to bottom, and the thickness of the release paper layer is 0.1mm. The thickness of the layer is 10 ± 1 μm and the thickness of the PVC substrate is 80 μm. The release paper layer is double-silicon release paper; the raw materials for the preparation of the adhesive layer include 50 parts of rubber base material, 12 parts of melting agent, 5 parts of filler and 0.5 part of anti-aging agent in parts by weight.

[0071] The rubber base material is a mixture of natural rubber and styrene-butadiene rubber at a weight ratio of 1:2, wherein the melt mass flow rate of the styrene-butadiene rubber is 0.05 g / 10 min.

[0072] The melting aid is a mixture of rosin and polyisocyanate glue at a weight ratio of 0.6:1, wherein the rosin is a primary rosin with an acid value of 166 mg / g. ...

Embodiment 2

[0080] The first aspect of embodiment 2 provides a kind of low precipitation PVC protective film, and protective film is followed by release paper layer, adhesive layer and PVC base material from top to bottom, and the thickness of release paper layer is 0.1mm, and bonding The thickness of the layer is 10 ± 1 μm and the thickness of the PVC substrate is 80 μm. The release paper layer is double-silicon release paper; the raw materials for the preparation of the adhesive layer include 86 parts of rubber base material, 20 parts of melting agent, 9 parts of filler and 3 parts of anti-aging agent in parts by weight.

[0081] The rubber base material is a mixture of natural rubber and styrene-butadiene rubber at a weight ratio of 1:4, wherein the melt mass flow rate of the styrene-butadiene rubber is 5 g / 10 min.

[0082] The melting aid is a mixture of rosin and polyisocyanate glue at a weight ratio of 1.5:1, wherein the rosin is a first-grade rosin, and the acid value is 166 mg / g. ...

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Abstract

The invention relates to the field of films, in particular to a low-separation PVC protective film and a preparation method thereof. From top to bottom, the protective film is a release paper layer, an adhesive layer and a PVC substrate. It has the advantages of good heat resistance and high stability. The plasticizer precipitation rate is extremely low at high temperatures and has no pollution to the circuit board. And destructive, by compounding natural rubber and styrene-butadiene rubber in a specific ratio, the toughness of the adhesive layer is significantly improved, as well as the adhesive force between the adhesive layer and the PVC substrate, the adhesive layer and the release paper layer, making The PVC protective film can be used for a long time, and the preparation method of the invention optimizes the complicated technical process in the prior art, and the enterprise can produce on a large scale, thereby improving economic benefits.

Description

technical field [0001] The invention relates to the field of films, in particular to a low-separation PVC protective film and a preparation method thereof. Background technique [0002] PVC generally refers to polyvinyl chloride, which is a polymer polymerized from polyethylene monomers. PVC film is widely used in the surface treatment of PCB and FPC circuit boards. In actual production, the plasticizer in PVC is easy to precipitate with the prolongation of use time and the change of the environment, and adheres to the surface of the circuit board, making the performance of the PVC film deteriorate, which not only seriously affects the use function of the circuit board, but also affects the production line. Workers, serious harm to the environment. In addition, circuit boards are mostly used in environments with strong light and high temperature, and existing PVC materials are prone to aging and deterioration under such conditions, which affects the service life of circuit ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/24C09J7/30C09J109/06C09J107/00C09J11/04C09J11/06C09J11/08
CPCC08K2003/2296C08K2003/265C08K2201/003C08L2201/08C09J11/04C09J11/06C09J11/08C09J109/06C09J2427/006C09J7/245C09J7/30C08L7/00C08L93/04C08K3/22C08K3/04C08K3/26C08K5/3437
Inventor 柯跃虎诸葛锋宋亦健曾庆明
Owner 广东硕成科技股份有限公司
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