JPS59129146A - Acrylic resin laminate having excellent bending resistance - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an acrylic resin laminate having excellent bending resistance. More specifically, the present invention relates to a laminate comprising a fibrous base fabric, a soft polyvinyl chloride layer, and an acrylic resin layer, which has excellent bending resistance, flexibility, weather resistance, and stain resistance. .

Technical Background Conventionally, a soft polyvinyl chloride resin (hereinafter referred to as PVC) layer has been applied on one or both sides of a fiber base fabric. The coated flexible laminated sheet is used in large tents such as Airdome.

In addition to this, PVC is used in terms of processability, economy, flame resistance, etc.
The essential advantages of? He is showing his full potential. However, these types of tents are exposed to the outdoors for long periods of time, and even if sufficient consideration has been given to the presence of stabilizers contained in the PVC layer, the VcPVC resin will gradually decompose over many years. ?
In addition, the plasticizer migrates to the surface and the surface gradually becomes sticky, and furthermore, it has serious drawbacks such as dust and the like sticking to the surface and making it difficult to remove.

As a countermeasure to the above-mentioned drawbacks of conventional laminated sheets, the effect of Kana 9 has been achieved by forming an acrylic resin film layer on J: of the PAIC layer. However, if such a laminate is rubbed strongly during use, cracks will appear in the acrylic resin film layer, and if these cracks are further enlarged, cracks will appear in the PVCI layer underneath. This has the disadvantage of significantly shortening the service life of the laminate. :.

The present invention was devised to solve the drawbacks of conventional laminated sheets in view of the above circumstances, and it disperses the stress applied to the resin layer, especially the surface layer made of acrylic resin, by rubbing (bending) and #=. After considering all possible ways to completely prevent cracks in the lever layer, we found that forming a large number of unevenness on the surface of this acrylic resin surface layer would be the most effective way to solve the above problem. We have discovered that this can be solved, and have completed the present invention./ISO Purpose of the Invention The purpose of the present invention is to create an acrylic material that has excellent bending resistance, flexibility, weather resistance, and stain resistance. We can provide complete resin laminates.

Summary of the Invention The acrylic resin bond of the present invention has excellent bending resistance.
A fibrous base fabric, at least one intermediate layer made of a soft polyvinyl chloride resin, and a surface layer formed on the intermediate layer and made of an acrylic resin. The thickness of the surface layer is within the range of 1 to 50 microns, and the surface VC of the surface layer is formed with a large number of convex portions and concave portions, and the highest point of each convex portion is Sot''
Lll'il: The difference in altitude between the lowest point of each of the four adjacent parts is 5
It is characterized by being larger than microns.

The laminate of the present invention comprises a fibrous base fabric, an intermediate layer made of a soft polyvinyl chloride resin having a shape (F; It comprises a resin surface layer and t.

R male base fabric used in the laminate of the present invention, natural fiber,
Inorganic fibers such as cotton, linen, etc., synthetic fibers such as viscose rayon, KEEPLA, etc., semi-synthetic fibers such as gee and triacetate fibers, and synthetic fibers such as nylon 6, It is made of at least one type selected from nylon 66, polyester (polyethylene terephthalate, etc.) fibers, aromatic polyamide fibers, acrylic fibers, polyvinyl chloride fibers, polyolefin fibers, and the like.

The fibers in the base fabric may be in any shape such as short fiber spun yarn, long fiber yarn, split yarn and 1 tape yarn, and the base fabric may be woven fabric, knitted fabric, nonwoven fabric, or a composite fabric thereof. It may be.

Generally, polyester fibers are preferred as the fibers contained in the laminate of the present invention, and these fibers are preferably in the form of long fibers (filaments), and are preferably in the form of a plain woven fabric. The base fabric is useful for maintaining the mechanical strength of the resulting laminate at a high level.

In the laminate of the present invention, one or both sides of the fibrous base fabric is coated with an intermediate layer made of a soft polyvinyl chloride resin. This intermediate layer contains a sufficient amount of flocs, e.g. 0.05
Thickness of mm or more, preferably 0.05 to 1.0 g
The 93 intermediate layer is made of a soft polyvinyl chloride resin film, a paste, or a straight film, and can be formed by conventionally known methods such as topping, calender linking, coating, dipping, etc. It can be shaped into a fibrillar base by #: can be.

The soft polyvinyl chloride resin may contain plasticizers, stabilizers, colorants, ultraviolet absorbers, etc., or other additives.

An acrylic resin surface layer is formed on at least one of the intermediate layers. As the acrylic resin, one mainly composed of two polyalkyl methacrylates is preferred.

The polyalkyl methacrylate resin is preferably a single polymer of methyl methacrylate, ethyl methacrylate, propyl methacrylate, or butyl methacrylate, or a copolymer of two or more of these. Acrylic resin medium V? - monopolymers such as alkyl acrylates, vinyl acetate, vinyl chloride, styrene, acrylonitrile, methacrylate trile, etc., or their 2fffi
A small amount of the above copolymer may be mixed in, or the above monomer may be copolymerized with the above alkyl methacrylate.

An acrylic abrasion surface layer is formed on the at least one intermediate layer by methods known in the art.

The acrylic resin surface layer in the carcass of the present invention is 1 to 50
It has a thickness within the micron range, and has many convex and concave portions formed on its surface, and the height difference between the highest point of each convex portion and the lowest point of each concave portion adjacent to it is It is 5 microns or more, preferably 7 microns or more.

If the thickness of the surface layer becomes less than 1 micron, the defects of the polyvinyl chloride resin intermediate layer cannot be sufficiently removed, and if the thickness difference of the surface layer becomes greater than 5D microns, the desired laminate will fail. Flexibility and flexibility become unsatisfactory. Furthermore, if the difference in height between the highest point of the convex portion and the lowest point of the concave portion is less than 5 microns, the effect of improving flexibility by forming the unevenness becomes unsatisfactory.

There are no particular limitations on the shapes and dimensions of the concave portions and convex portions formed in the surface layer as long as the objective of the present invention can be achieved.
Ice area Cn of the surface layer? This V100~i, o
It is desirable that o o, o o o convex portions are formed in the formation awn.

To form the acrylic resin surface layer on the polyvinyl chloride resin intermediate layer, first prepare an acrylic resin film having a desired uniform thickness, and roll it on a smooth table or roll with a smooth peripheral surface. , Is this an uneven pattern with a predetermined shape and dimensions? Engraving and pressing with a shaping plate or shaping roll to create the desired unevenness. Formed on one side of the acrylic resin film. Of course, the uneven pattern may be formed on both sides of the film.
To be sure that it is not prepared as described above, at least 1R (an acrylic resin film with unevenness on B) may be adhered with an adhesive on the polyvinyl chloride resin intermediate layer, or the surface of the intermediate layer may be bonded. For example, heat the partial layer to 1.10℃ to 200℃, melt it in a bath, and then press the acrylic resin film onto the soil. The entire film was pasted by the method described above and obtained f
(c) The acrylic resin surface of the carcass may be shaped with concave and convex syllables similar to those described above.

The unevenness formed on the imprinting surface (circumferential surface) K may correspond to the unevenness pattern VC to be imparted to the acrylic resin surface j, and when forming the unevenness, the unevenness formed on the acrylic resin surface? J tray, 30℃ below the glass transition point (Ty) of this acrylic resin.
It is recommended to heat it outdoors to a temperature within the range of normal temperature to 10° C. below its melting point (Tm). For this purpose, acrylic resin film (or surface layer)? 1-It may be heated to a desired temperature in advance and subjected to the shaping process, and/
Alternatively, the shaping plate (I:I-ru) may be heated to a desired temperature.

As shown in FIG. 1, a conventional Tjt layered carcass fibrous base fabric 1, soft polyvinyl chloride resin intermediate layers 2Δ and 2B formed on both sides thereof, and an intermediate layer 2AJ are formed. vomitf'L
71: Smooth? It consists of an acrylic resin surface layer 3.

The laminate of the present invention f' shown in FIGS. 2 and 3 is
Like the laminate shown in FIG. 1, it includes a fibrous base fabric 1 and soft polyvinyl chloride resin intermediate layers 2A and 2B.
A large number of fine irregularities are formed on the surface VC of the acrylic resin surface layer 4 formed on the intermediate layer 2AJ:.

In the laminate of the present invention shown in FIGS. 2 and 3, the surface layer 4 is disposed on only the two intermediate layers in the shape A: while the other surface layers are in the upper pressure shape H- It's okay to be confused.

The joint surface with the upper surface layer of the intermediate layer may be smooth as shown in FIG. 2, or may be uneven as shown in FIG.

In the latter case, the adhesive strength of both layers increases.

Also, some of the polyvinyl chloride resins are #! It may invade into the fibrous group 7rD. In this case, one effect of the invention is that the adhesive strength between the base fabric and the intermediate layer increases.In the carcass of the present invention, the acrylic resin surface layer covers the fibrous base fabric and the polyvinyl chloride resin intermediate layer. What about the weather resistance of laminates? This not only improves the stain resistance of the laminate, but also completely prevents the bleeding of the degradable agent from the polyvinyl chloride resin intermediate layer to the surface of the laminate. The large number of minute irregularities improves the bending resistance of the laminate and prevents cracks from occurring in the surface layer. Therefore, the laminate of the present invention can be used for a long period of time without surface cracking or staining.

Based on the above-mentioned properties, the laminate of the present invention is suitable for outdoor sheets such as tents, vehicle tops, and outdoor storage tops, and exhibits its effectiveness particularly when subjected to severe bending action under strong winds. can do.

Further, since the acrylic resin surface layer has a thickness of only 50 microns at most, the laminate of the present invention can be welded. Wow

[Brief explanation of the drawing]

FIG. 1 is a sectional explanatory view of a conventional laminate, and FIGS. 2 and 3 are sectional explanatory views of an embodiment of the laminate of the present invention. 1... Fibrous base fabric, 2 A, 2 B.
... PVC intermediate layer, 3 ... Acrylic resin surface layer of conventional technology, 4 ... Acrylic resin surface layer according to the present invention. Patent applicant Hiraoka Orisen Co., Ltd. Patent application agent Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney Akira Yamaguchi

Claims (1)

[Claims] 1. A fibrous base fabric and a flaw formed on at least one surface thereof;
and an intermediate layer made of a soft polysalt vinyl resin, and a surface layer made of an acrylic resin, and the thickness of the surface layer is 1 to 50.
within the range of microns and @ the surface of the light distribution surface layer vc
Bending resistance: A large number of concave portions are formed above the convex portions, and the height difference between the highest point of each convex portion and the lowest point of each adjacent concave portion is 5 microns or more. An acrylic resin laminate with excellent durability. 2. Specify that the convex portion of the surface layer has a horizontal area Cm" of the surface of the surface layer, per 100 to i, o o o, o o
o The laminate according to claim 1, which exists in one city.