KR101548484B1

KR101548484B1 - Film for automotive piece floor protection

Info

Publication number: KR101548484B1
Application number: KR1020150052434A
Authority: KR
Inventors: 장세주
Original assignee: 장세주
Priority date: 2015-04-14
Filing date: 2015-04-14
Publication date: 2015-08-28

Abstract

Disclosed is a film for protecting a paint film layer of an automobile for protecting a paint film layer of an automobile from outside moisture or contamination during transportation or storage of an automobile so that the film and the pressure sensitive adhesive do not deteriorate at a high temperature. The inner layer is composed of a 90% by weight polypropylene block copolymer and 10% by weight of titanium oxide (TiO ₂ ). The middle layer is composed of a 60% by weight PP block copolymer and a 10% The outer layer is made of a 90% polypropylene block copolymer and a 10% by weight titanium oxide (TiO ₂ ) in a weight ratio of 30%, and the outer surface of the inner layer is made of titanium oxide (TiO ₂ ) According to the present invention, according to the film for protecting a coating layer of an automobile, a polypropylene block copolymer is coated on a substrate Since it is composed of the inner layer, the middle layer and the outer layer, it is possible to reduce the thickness and thus the cost can be reduced and it can be supplied at low cost. By the whitening of the film, oxidation of toxic substances, superhydrophilic effect, Is blocked to protect the film and the adhesive property is maintained by the polyorganosiloxane having 80 to 90 parts by weight of the silicone adhesive to prevent the silicone adhesive from sticking to the coating layer at the time of peeling.

Description

Technical Field [0001] The present invention relates to a film for an automobile,

The present invention relates to a film for protecting a coating layer of an automobile, which is used for protecting a coating layer of an automobile, and which prevents a film and a pressure-sensitive adhesive from being deteriorated at a high temperature.

As is well known, automobiles manufactured by automobile manufacturers are loaded on trucks or ships for long distance while they are being delivered to customers, and are left waiting for a long time in the departure hall. At this time, the film layer due to dust, moisture, And a film layer protective film is attached on the coating layer of the automobile in order to prevent the film from being deteriorated and the film layer to be discolored due to ultraviolet rays.

As described above, the coating film layer protective film used for protecting the coating film layer of an automobile must not deteriorate and oxidize the film when it is left outdoors for 6 months, so if the heat resistance is not good, It can not be used as a coating film protective film for automobiles to be guaranteed.

Further, when the film for protecting a coating layer of an automobile is adhered on a coating film layer of an automobile and left for 6 months outdoors, the coating film protective film is peeled off from the coating film layer of the automobile, It should be economical.

Most of the films for protecting the coating layer of the automobile depend on imports. As a representative film for protecting the coating layer of the automobile, DuPont's products are made of a special nonwoven fabric, so that manufacturing costs are expensive. Therefore, It can not be applied to the generalized application.

In addition, there is a coated adhesive coated sheet having a film provided with a polyisobutylene rubber pressure-sensitive adhesive layer as a comparatively inexpensive product, and a wrap guard product manufactured by Kansai Paint Co., Ltd., but the adhesive property is poor, There is a problem that the automotive coating layer is damaged by water droplets trapped between the coating layer and the protective film.

In addition, it is possible to increase the softness of the film by adding a third substance of a fatty acid to the polyolefin and the inorganic filler, such as European Patent Registration Publications 0066672, 0307116, 0459142, and 779325, or to disproportionate physical properties of the film in the longitudinal and transverse directions As a solution.

In addition, European Patent Application Publication No. 0232060 and US Pat. No. 4,770,073 disclose a technique for controlling the mechanical strength of the breathable film, increasing the moisture permeability and improving the tear strength by using a specific technique such as embossing on the post-processing of the film.

When the outdoor test is conducted for 6 months with most of the coating film layer protective films as described above, the film deteriorates and oxidizes and the physical properties of the film deteriorate sharply. When the film for protecting the film layer is peeled from the coating film layer of an automobile, There is a problem such as sticking or sticking to the coating layer.

Korean Patent Publication No. 10-2005-0096225, (published on October 5, 2005) Korean Patent Laid-Open No. 10-2012-0022141 (published on March 12, 2012) Korean Patent Publication No. 10-2000-0028872 (published on May 25, 2000) Korean Patent Publication No. 10-1999-0088326, published on December 27, 1999,

In order to solve the above-mentioned problems, the present invention provides a method for protecting a paint film layer of an automobile from outside moisture or pollution during transport or storage of an automobile to deliver to a customer from an automobile manufacturer, Layer film for protecting a coating layer of an automobile which is constructed such that the layer-protecting film is not deteriorated at a high temperature and the physical properties of the pressure-sensitive adhesive for adhering the coating film layer-protecting film on the coating layer are not deteriorated.

The film for protecting a coating layer of an automobile according to the present invention is characterized in that an inner layer, an intermediate layer and an outer layer are integrally formed to have a thickness of 35 to 45 탆 and a silicone adhesive is applied to the outer surface of the inner layer to a thickness of 25 탆, (PP block copolymer) and 10 wt% of titanium oxide (TiO ₂ ), and the intermediate layer formed between the inner layer and the outer layer was composed of 60 wt% of a PP block copolymer, 10% by weight of titanium oxide (TiO ₂ ), and 30% by weight of a UV barrier agent. The silicone adhesive applied to the outer surface of the inner layer has a number average molecular weight of 3,000 to 5,000 and a viscosity of 150,000 to 250,000 cp Wherein the polyorganosiloxane is a polyorganosiloxane having a number average molecular weight of 1,500 to 2,000 and a viscosity of 100 to 500 cp at 25 DEG C, And 10 to 20 parts by weight of diorganosiloxane is a feature of the present invention.

According to the film for protecting a coating layer of an automobile of the present invention, since the inner layer, the middle layer and the outer layer are integrally formed and thinned by using a polypropylene block copolymer as a main material, the cost is reduced, There is an effect that can be,

In addition, not only the whitening effect of the film, the harmful substance oxidation effect and the superhydrophilic effect are shown by the titanium oxide (TiO ₂ ) contained in the inner layer, the middle layer and the outer layer, but also the ultraviolet rays are blocked by the UV blocking agent, There is an effect to protect.

The film for protecting a coating layer of an automobile according to the present invention is characterized in that the adhesive property is maintained by the polyorganosiloxane having 80 to 90 parts by weight of the silicone pressure-sensitive adhesive so that the silicone pressure-sensitive adhesive tends to stick to the coating layer or peeling and discoloration of the coating layer .

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing the structure of a film for protecting a coating layer of an automobile according to the present invention

The construction and operation of the film for protecting a coating layer of an automobile according to the present invention will be described in detail with reference to the accompanying drawings.

The film for protecting a coating layer of an automobile according to the present invention comprises an inner layer, an intermediate layer and an outer layer, wherein the inner layer is composed of 90 wt% of a polypropylene block copolymer and 10 wt% of titanium oxide (TiO ₂ ) 60% by weight of a PP block copolymer, 10% by weight of titanium oxide (TiO ₂ ) and 30% by weight of a UV blocking agent, and the outer layer consisted of 90% by weight of a PP block copolymer And 10% by weight of titanium oxide (TiO ₂ ). The thickness of the film for protecting the coating layer, which is the sum of the inner layer, the middle layer and the outer layer, is 35 to 45 μm and the outer surface of the inner layer is coated with a thickness of 25 μm . As already known in the art, UV (ultraviolet) blocking agents are widely used such as titanium white, red oxide, zinc white, alumina, tin oxide and carbon black, The use of 5 mu m results in a stable dispersion state.

The silicone pressure sensitive adhesive to be applied to the outer surface of the inner layer has a number average molecular weight of 3,000 to 5,000 and 80 to 90 parts by weight of a polyorganosiloxane having a viscosity of 150,000 cp to 250,000 cp (based on 25 ° C) And 10-20 parts by weight of a polydiorganosiloxane having a number average molecular weight of 1,500 to 2,000 and a viscosity of 100 to 500 cp at 25 ° C. The adhesive property of the polyorganosiloxane which occupies 80 to 90 parts by weight (about 80% by weight or more) is maintained so that the silicone adhesive adheres to the coating layer at the time of peeling, and the effect of completely preventing the swelling and discoloration of the coating layer have.

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It is most preferable to use a polyorganosiloxane having a number average molecular weight of 3,000 to 5,000 and a vinyl group having a viscosity of 150,000 to 250,000 cp (based on 25 ° C) as the polyorganosiloxane in the silicone pressure- .

Next, the polyorganohydrogensiloxane means a silicone resin having a C ₂ to C ₅ hydrocarbon group in the above polyorganosiloxane, and the polyorganohydrogensiloxane is directly connected to Si in the polyorganosiloxane or is bonded to Si And may be contained in an amount of 0.1 to 0.5 parts by weight based on 80 to 90 parts by weight of the polyorganosiloxane.

The polyorganosilyl platinum catalyst means a silicone resin of a complex of polyorganosiloxane and platinum, and is contained in an amount of 0.01 to 0.05 parts by weight based on 80 to 90 parts by weight of the polyorganosiloxane.

Polydiorganosiloxane of the general formula ^{_{(R 1 3 SiO 1/2) a}} (R 2 2 SiO 2/2) as the polymer resin is represented by _b, the number average molecular weight of the polydiorganosiloxane has a viscosity of about 1500-2000 Is preferably 100 to 500 cp (based on 25 ° C), and the content thereof is preferably 10-20 parts by weight, based on 80-90 parts by weight of the polyorganosiloxane, of a polydiorganosiloxane having a relatively lower viscosity than the polyorganosiloxane By weight, the viscosity of the silicone pressure-sensitive adhesive can be appropriately maintained.

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Example

The pressure sensitive adhesive made of the silicone pressure sensitive adhesive exhibits a pressure of 5 to 20 gf / in, and a pressure sensitive adhesive having a solid content of 99.8% or more can be produced.

1) used in Experiments 1, 2 and 3 denotes a polyorganosiloxane, 2) a polyorganohydrogen siloxane, 3 a polyorganosilyl platinum catalyst, and 4 a polydiorganosiloxane.

Experiment 1)

1) 85% 2) 0.25% 3) 0.05% 4) 14.7% by weight of the silicone pressure-sensitive adhesive was applied to the coating film protective film at a dry thickness of 25 μm, The following measurement results can be confirmed.

Experiment 2)

The coating layer was coated on the film for protecting the coating layer with a dry thickness of 25 mu m and then cured at 160 DEG C for 5 minutes to form a test piece. .

Experiment 3)

1) 85% 2) 0.35% 3) 0.05% 4) 14.6% The composition was applied to a film for protecting a coating layer with a dry thickness of 25 μm and then cured at 160 ° C. for 5 minutes. The same measurement result can be confirmed.

Item Experiment 1 Experiment 2 Experiment 3 Viscosity 140,000 130,000 140,000 adhesiveness 7 10 7 Non-volatile matter 99.5 99.4 99.4

Then, the following test was conducted on a film for protecting a coating layer of an automobile.

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After the coating film protection film of the automobile is produced, the film for protecting the coating layer of the automobile is adhered to the hood panel, the door, the trunk, the roof of the automobile body and then left for 6 months. The change and the film layer change test were tested for 1 to 6 months and there was no significant change.

The test results are shown in Table 2 below.

division Test Methods method of inspection One month Two months Three months Four months Five months Six months Peeling test 80 Km 1 hour driving No peeling from the coating layer Good Good Good Good Good Good Test for presence of coating layer abnormality Natural neglect No discoloration of the coating layer Good Good Good Good Good Good Test for adhesive trouble Natural neglect Coating layer Not to be clingy Good Good Good Good Good Good Bond strength test Tensile testing machine evaluation 0.7 ~ 0.8kg / 25mm 0.7 0.75 0.71 0.70 0.72 0.73 Heat resistance test 20 ~ 60 ℃ No oxidation Good Good Good Good Good Good

As can be seen from the above Table 2, the film for protecting a coating layer of an automobile according to the present invention is excellent in peelability, and the coating layer of the vehicle body is stably protected. In particular, the coating film is free from sticking or sticking to the coating film, The coating film layer is maintained in a very good condition without any abnormality such as discoloration.

In the high-temperature heat resistance test, the results as shown in Table 3 are obtained at a high temperature of 160 ° C for 2 to 10 hours.

division Test Methods method of inspection 2 hours 4 hours 6 hours 8 hours 10 hours High temperature heat resistance test 160 ° C No oxidation Good Good Good Good Good

As can be seen from the above Table 3, the film for protecting a coating layer of an automobile according to the present invention showed no change as a result of confirming the alteration process of the film at 160 DEG C for 2 to 10 hours.

Claims

In a film for protecting a coating layer of an automobile,
An inner layer, an intermediate layer and an outer layer are integrally formed to have a thickness of 35 to 45 탆 and a silicone adhesive is applied to the outer surface of the inner layer to a thickness of 25 탆,
The inner layer and the outer layer are composed of a polypropylene block copolymer (PP block copolymer) of 90 wt% and a titanium oxide (TiO ₂ ) of 10 wt%, and an intermediate layer formed between the inner layer and the outer layer is a polypropylene block copolymer 60 wt%, titanium oxide (TiO ₂ ) 10 wt%, and UV blocker 30 wt%
The silicone pressure-sensitive adhesive applied on the outer surface of the inner layer is prepared by blending 80 to 90 parts by weight of a polyorganosiloxane having a number average molecular weight of 3,000 to 5,000 and a vinyl group having a viscosity of 150,000 to 250,000 cp (based on 25 ° C), 0.1 to 0.5 parts by weight of a polyorganohydrogen siloxane , 0.01 to 0.05 parts by weight of a polyorganosilyl platinum catalyst, 10-20 parts by weight of a polydiorganosiloxane having a number average molecular weight of 1,500 to 2,000 and a viscosity of 100 to 500 cp (based on 25 占 폚). film.

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