JPS5824409A - Surface treatment of film - Google Patents

Abstract

PURPOSE:To form a primer layer closely adhered to the complicated shaped surface of a film, by simultaneously applying emboss processing and coating processing of a liquid treating agent to a thermoplastic polymer film. CONSTITUTION:A thermoplastic polymer (e.g.; polyethylene terephthalate) film is preliminarily heated and, by using an emboss roll holding a liquid by adhering a liquid treating agent such as an easily adhesive coating liquid, an easily slidable coating liquid or an easily releasable coating liquid to the surface thereof, emboss processing is applied to the surface of the film and, at the same time, said liquid treating agent is transferred and coated to the surface of said film from the said emboss roll.

Description

DETAILED DESCRIPTION OF THE INVENTION Overlaying relates to a film surface treatment method in which a layered polymer film is subjected to physical embossing and application of a chemical liquid treatment agent at the same time.

More specifically, Ilk is a process in which a polymer film that has been preheated and layered is subjected to a molding process using an embossing die, and a carp is formed into a Km shape at the same time as the shaping process. This is the S method for surface treatment of films and films in which the 4611 agent is transfer-coated.

Conventional technology involves embossing and application of highly adhesive coating liquid.
A simultaneous treatment method with the platform had not been attempted. The reason for this is that in embossing, it is advantageous to hold the polymer film at a relatively high temperature and shape it in a heated layered state, whereas ink adhesive processing uses materials such as polyurethane resin, which have excellent adhesive properties. Coat the film by applying an aqueous solution of the resin at room temperature! This is because the surface is heated and hardened. 4L.

When thermoplastic resin is applied at high temperatures, hardening occurs rapidly, so embossing and ink adhesion are all done at the same time.
If embossing is performed while drying and curing *W which has been subjected to water-based waves of a curable resin, which is difficult to apply, the curable resin will adhere to the embossing roll, making embossing virtually impossible. In any case, the simultaneous processing method of the present invention was thought to be impossible in the prior art.

The present invention was achieved based on the finding that if a thermoplastic polymer is preheated, it can be sufficiently shaped using an embossing rule in a cooled state. As a result, the temperature of the liquid processing agent that does not cause heat curing, which is the emboss rule, is maintained at a temperature lower than that of the liquid processing agent, and the emboss court also serves as an applicator roll for the kiss coat method. This is what I found out.

That is, in the present invention, when embossing a Sagishin or Mifujin film made of a thermoplastic polymer using F4NU2, if a %cough film is required, it can be preheated and layered in advance. , the embossing rule is coated with a liquid treatment agent such as an easily adhesive coating liquid, an easily slippery coating liquid, or an easily adhesive coating liquid, and the liquid treatment agent is applied at the same time as embossing of the # film. This is a method of surface treatment of a film, which consists of applying a transfer coating to the surface of the film from an embossed slurry.

The present invention will be explained.

Thermoplastic polymers to which the present invention can be applied include aromatic polyesters represented by polyethylene terephthalate, polybutylene terephthalate, and polyethylene-λ6-naphthalene dicarpoxylate, polyolefins represented by polyethylene, polyboupyrene, and Polysthene-IK, nylon 6, 66 fathoms of nylon Boria! An example is a polymer having a strong main component. The present invention can be applied to copolymers and polymer blends other than homopolymers as long as they are thermoplastic and moldable polymers. Note that a biaxially stretched polyethylene terephthalate film is a preferred example to which the present invention is applied.

Films made of thermoplastic polymers include unstretched films, -axially stretched films, and biaxially stretched films, and also include low-strength films with incomplete stretching. For embossing, by combining various preheating conditions and forming patterns, it is possible to form ai#Ss from an unextended film to a crystalline two-wheel film with completed Fujin. On the other hand,
Formation of a film surface layer by applying a liquid treatment agent is hardly hindered by the wind-like orientation of the film.

The preheating temperature for the film is generally higher than the glass transition point of the film, and if the Sagi-elongation orientation is complete, a layered state can be achieved by increasing the heating temperature to a high temperature. For example, in the case of an unstretched ethylene terephthalate film, the metal rod and the film surface tend to stick at temperatures above about 1.0°C, so it is preferable to preheat the film in the range of SO to 100°C. However, since it has sufficient self-supporting properties under tension even at 13°C, the unstretched film is preheated to this temperature and the temperature between 11°C and 13°C is maintained under tension.
The carp can then be shaped using the emboss-kK which is cooled. Further, for example, in the case of Sagishin polyethylene terephthalate film, it is preferable to preheat the film to a temperature in the range of 1sO°C to 30°C. The preheating temperature can be selected from a temperature range whose lower limit is an upper limit temperature at which the self-supporting properties of the film can be maintained and a temperature slightly higher than the glass transition point at which layer formation occurs. Of course, the higher the temperature, the more the film becomes flexible, and the cool imprint shape becomes easier to transfer.

Note that it is also possible to perform embossing without preheating.

The embossing wheel is a metal roll, and the preheating film is held in pair with the backup roller. backup p
- You can select surface materials such as metal, rubber, cloth, and paper. Pressure may be applied to the film using known means such as hydraulic pressure.

The etching of the embossing roll is! Depending on the application, you can choose from deep engravings that are deeper than IOl turn (voice) to shallower engravings that are less than zlpn. In particular, k, which imparts lubricity to the fill, is formed by forming minute irregularities such as thread embossing.
That film! At 111K, a surface coating of silicone resin can be further formed.

The embossing rule also serves as an applicator rule, and CII-like chicken coral liquid is supplied to the embossed island surface immediately or via a pick-up rail from a bath filled with a liquid treatment agent. As the cloth device, a known Kisuru method can be adopted.

As a liquid adhesive, Emulgene aqueous liquid containing polyurethane resin, acrylic resin, and polyester resin is most suitable when attempting to anchor an adhesive layer to a film. In order to form a single layer of primer stably, k is 1.
~ II @ apH (4L antipoise) The viscosity is 1 degree, and it is recommended to adjust it by using a Klk cloth-based method to form thin surface wrinkles. When water-based JL resin, silicone-containing polyvinyl chloride, and resin emulsion are applied, the thin film layer formed on the surface of the film will make the film slippery.

Similarly, when a thin surface layer of alumina-containing resin is formed,
The film to be treated exhibits releasability.

In addition to embossing, the film coated with an aqueous liquid filler is dried as necessary. For the drying process, omniscient means such as dry heated air, radiation, A suspension, etc. can be applied.

The present invention has the advantage that embossing and surface coating can be applied to the film at the same time, and as a result, a single layer of ply 1 is formed which is not only very precise but also adheres to a complex imprinting surface. If the embossed film
When trying to form a single layer of primer on the i image as post-processing, the surface was not smooth, so a layer of 1 m was added to the film surface i1.
It is not a container to apply 5KJlB physical liquid to the surface.

The present invention will be explained below with reference to Examples.

Example I A polyethylene terephthalate film manufactured by S.A. is embossed with an embossing tool having an A4 groove and a fiber backing tool. A part of the emulsion is immersed in an I&L bath containing a liquid treatment agent consisting of an adhesive and a nonionic surfactant, and this emulsion is picked up on the embossed hole, and over-processed with an air knife. Remove the liquid from the surface of the embossed island to adjust the amount of liquid retained.

Preheat the above-mentioned film to 1.
℃）K Embossing and Emul 9W embossing are applied at the same time. Then, the film was dried with glue and heated air at 0.degree. C. to obtain a post-processed film with an outer layer.

This processing film A11cz) 11 j / 1 m wm width v6
& Turtle vs. upper g * example” 64111 @ I/ 11
It exhibited an adhesive force of m.

Example: When one piece of polyethylene terephthalate film is embossed in a hexagonal shape with T8 strips and a grooved edge Ll1 m/s tortoiseshell pattern, KM degree 4S degree polyurethane is used in a bath containing silicone emulsion 9W. By dipping a sponge pellet, bringing the embossing tool into contact with the pellet, and uniformly transferring the embossed material onto the surface of the embossing strip using a sponge seal, the film Table 1jK is formed at the same time as the embossing. Transfer emulsion. After this 110
It was dried with hot air at ℃ to obtain an embossed film having a silicone-based modified product on the surface.

When this film is used as a release material for glass fiber-reinforced polyester resin footwear, the release force at the time of release is immature [IS 7
7/30 vm width, the width of this example is *s
It was in ll/so■.

Claims (1)

[Scope of Claims] 1) When performing embossing with a fill AiC emboss sole made of a layerable polymer, the housing 4611 agent is attached to the square embossment sole and embossed, and at the same time as the embossing process, the square housing-shaped I & Ru A fill consisting of transferring the agent from the IIIHC armpit embossment of the fill.
The surface of the chicken.冨　　　　　　　　　　　　　　　is. 3) Claim 11, wherein the layerable polymer is polynisdel.