JPS58154745A - Modified polyvinyl chloride resin film - Google Patents

Abstract

PURPOSE:To provide the titled film having excellent adhesion, by blending a vinyl chloride/vinyl acetate/maleic anhydride terpolymer and a specified filler with polyvinyl chloride resin. CONSTITUTION:3-15pts.wt. terpolymer (B) obtd. by adding 0.1-10pts.wt. maleic anhydride to a vinyl chloride/vinyl acetate copolymer, and 3-20pts.wt. filler (C), such as calcium carbonate, whose surface has been treated with a fatty acid such as stearic acid or lauric acid or a resin acid such as rosin resin, are blended with 100pts.wt. polyvinyl chloride resin. The resulting blend is molded into a film by a calender roll method to obtain the desired polyvinyl chloride resin film. The blend can be well molded into a film without suffering adhesion of the resin blend to rolls by the action of component C.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a modified polyvinyl chloride resin film with improved adhesion and tear strength. In general, polyvinyl chloride resin film (hereinafter referred to as PVC film) is ◎For this reason, for example, a copolymer of vinyl chloride resin and a polar monomer may be used with an ester-based or ketone-based solvent that can dissolve polyvinyl chloride resin. A method of adhering to the adherend using primers diluted with

However, this method has the disadvantage that the primers soften the PvO film during adhesion, causing wrinkles and deformation.There are also some methods of heat-sealing without using harsh solvents. However, it has the disadvantage that it is limited to fusing PVC films together. In view of the state of the prior art, the inventors of the present invention have conducted intensive research and found that polyvinyl chloride resin is made of vinyl chloride-vinyl acetate copolymer. It has been discovered that adhesion can be improved by adding a terpolymer formed by addition polymerization of maleic anhydride to a material. The vinyl chloride resin mixture adheres to the roll, making it impossible to form a film.

The inventors of the present invention further conducted intensive research into a composition that can be formed into a film by the calendar roll method without reducing the adhesiveness of the obtained PVO film, and found that the problem could be solved by blending a predetermined amount of a specific filler. 1. This led to the present invention &4.

That is, in the present invention, 100 parts by weight of polyvinyl chloride resin is treated with 3 to 15 parts by weight of a terpolymer obtained by addition polymerizing maleic anhydride to a vinyl chloride-vinyl acetate copolymer and fatty acid or resin acid. The present invention provides a modified polyvinyl chloride resin film, characterized in that it is formed by molding a mixture containing 5 to 20 parts by weight of a filler.

According to the present invention, the PvC film can be firmly adhered to a suitable adherend using a conventional adhesive.

The terpolymer used in the present invention is a copolymer obtained by copolymerizing vinyl chloride and vinyl acetate by a conventional method (vinyl acetate content: 5 to 30% by weight), and 0.0% maleic anhydride.
It is formed by addition polymerization of 1 to 10 parts by weight, and the polymer is added in an amount of 3 to 15 parts by weight based on 100 parts by weight of the main polyvinyl chloride resin. If the amount of the polymer is less than 3 parts by weight, no improvement in adhesion can be expected, and if it is more than 15 parts by weight, no improvement in adhesion can be expected.

In addition, the filler used is calcium vertical oxide, which is surface-treated with a fatty acid such as stearic acid or lauric acid, or a resin acid such as a rosin resin. It is 3 parts by weight or less,
It is not possible to prevent adhesion to the roll during film forming, and
If the amount exceeds 1 part by weight, the film becomes brittle, which is not preferable.

The PVO film of the present invention contains known compounding agents such as low molecular weight or high molecular weight stabilizers, pigments, untreated fillers, stabilizers, etc., or synthetic rubbers such as nitrile rubber and acrylic rubber, as well as general PVC films. Alternatively, a suitable amount of vinyl chloride-vinyl acetate copolymer or the like can be added.

Since the PVo film of the present invention is constructed as described above, it is clear that it has excellent adhesive properties, as is clear from the Examples described later.

In the following, "0" in the text indicating Examples means parts by weight.

Example 1 The following formulation was stirred with a mixer (40°C) and then processed into a film using a calendar roll maintained at 160 to 180°C to obtain a PvC film with a thickness of 50 μm 〇 During this film processing The mixture did not adhere to the roll and could be formed into a film well.

Compound Polyvinyl chloride resin (degree of polymerization 1100) 100 parts Polyester plasticizer 30 parts Epoxy plasticizer 2 parts Vinyl chloride-vinyl acetate copolymer 100 parts (vinyl acetate content 13 parts by weight)
) is an addition polymer of 1 part of maleic anhydride.
1 part stearic acid treated leg acid calcium 7 yum lO
m Cadmium stearate 2 parts Barium stearate 1 part Example 2 The formulation shown below was made into a film in the same manner as in Example 1 to obtain a PvC film ◎ During film processing, the mixture did not adhere to the roll and was good. was able to be made into a film.

Compound Polyvinyl chloride resin (degree of polymerization 1000) 100 parts Polyester plasticizer 25 parts Vinyl chloride-vinyl acetate copolymer 100 parts (vinyl acetate content 20 parts)
A terpolymer obtained by addition polymerizing 2 parts of maleic anhydride to (by weight -) 15 parts Rhusium 9 carbonate treated with a rosin resin 10 parts Cadmium stearate 2 parts Barium stearate 1 part Example 3 The formulation shown below The product was formed into a film in the same manner as in Example 1 to obtain a PVC film. During film processing, the mixture did not adhere to the roll and was successfully formed into a film.

Compound polyvinyl chloride resin (degree of polymerization 1200) 100 parts dioctyl phthalate' 15 parts epoxy plasticizer 3 parts terpolymer (same as Example 2) 7 parts nitrile rubber
15 parts resin acid treated filler (Example 2
) 10 parts cadmium stearate
2 parts barium stearate 1 part Next, in order to evaluate the PVC films obtained in Examples 1 to 3 above, an acrylic pressure-sensitive adhesive layer mainly composed of butyl acrylate was formed on one side of the mosquito film. Cut the sample to 20mm width and paste it on a stainless steel plate (2k
(pressure once with a rubber roller of g), 25℃
% R, H, for 48 hours, 70°C for 15 days, and 50°C water for 7 days, taken out and peeled off at 180 degrees, adhesive strength (conditions: tensile speed 300 mm 7 m1)
n% at 25°C x 60% R,H,) was measured. The results are shown in Table 1. The pv○ films used in the reference examples in Table 1 were made of the known formulations listed below.

Compound Polyvinyl chloride resin (degree of polymerization 1150) 100 parts Polyester plasticizer 30 parts Ba -
Zn-based liquid stabilizer 1.5 parts Ba-Z
N-based powder stabilizer 1.5 parts Lucium carbonate 5 parts As is clear from the examples, it is clear that the PVC film of the present invention exhibits excellent running adhesion and tear strength.

Claims (1)

[Claims] For 100 parts by weight of polyvinyl chloride resin, vinyl chloride-
Form a mixture containing 3 to 15 parts by weight of a terpolymer obtained by addition-polymerizing maleic anhydride to a vinyl acetate copolymer and 3 to 20 parts by weight of a filler treated with fatty acid or resin acid. Modified polyvinyl chloride resin film 0