KR101297044B1 - Biodegradable sheet having fabric layer - Google Patents

Abstract

The present invention relates to a sheet, and more particularly, a substrate layer, an adhesive layer formed on the substrate layer and a fabric layer formed on the adhesive layer, wherein at least one of the adhesive layer and the fabric layer is PLA resin It relates to a biodegradable sheet comprising a.

Description

Biodegradable sheet with fabric layer {BIODEGRADABLE SHEET HAVING FABRIC LAYER}

The present invention relates to a sheet, and more particularly, a substrate layer, an adhesive layer formed on the substrate layer and a fabric layer formed on the adhesive layer, wherein at least one of the adhesive layer and the fabric layer is PLA resin It relates to a biodegradable sheet comprising a.

Sheets using petroleum resins such as polyvinyl chloride (PVC) are widely used in buildings such as houses, apartments, apartments, offices, and stores.

Such a sheet is produced by T-die extrusion or calendering method using a resin such as polyvinyl chloride (PVC). However, since the raw materials are all obtained from crude oil, which is a limited resource, it is expected that problems such as difficulty in supply to raw materials will arise due to exhaustion of petroleum resources.

In addition, even in consideration of increasing environmental concerns, polyvinyl chloride (PVC) -based sheet has a problem that it is easy to discharge the harmful substances, burdening the environment at the time of disposal.

An object of the present invention is to solve the supply and demand problems of the raw material of each layer constituting the sheet by including a fabric layer woven by injecting the PLA resin in the form of fibers and an adhesive layer using the PLA resin, to provide an eco-friendly sheet have.

Biodegradable sheet according to an embodiment of the present invention for achieving the above object includes a base layer, an adhesive layer formed on the base layer, a fabric layer formed on the adhesive layer, the adhesive layer and the fabric layer Is characterized in that it comprises a PLA resin.

In addition, the biodegradable sheet according to another embodiment of the present invention for achieving the above object is formed on the substrate layer, the adhesive layer formed on the base layer, the fabric layer formed on the adhesive layer, the upper fabric layer It includes a printing layer, the adhesive layer and the fabric layer is characterized in that it comprises a PLA resin.

In addition, the biodegradable sheet according to another embodiment of the present invention for achieving the above object is formed on the substrate layer, the adhesive layer formed on the base layer, the fabric layer formed on the adhesive layer, the upper fabric layer It includes a printing layer, a surface treatment layer formed on the printing layer, wherein the adhesive layer and the fabric layer is characterized in that it comprises a PLA resin.

Biodegradable sheet according to the present invention can solve the problem of supply of raw materials due to exhaustion of petroleum resources by using PLA resin based on plant resources, instead of PVC generally used.

In addition, the biodegradable sheet according to the present invention is less emissions of environmentally harmful substances such as CO ₂ during manufacture, and is easy to dispose of.

In addition, the biodegradable sheet according to the present invention can be used in a variety of aspects, such as outer wall materials, such as building wallpaper, building interior materials, various electronic products, furniture.

1 to 3 are cross-sectional views showing embodiments of the biodegradable sheet according to the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, a biodegradable sheet according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 are cross-sectional views showing a biodegradable sheet according to an embodiment of the present invention.

First, as shown in FIG. 1, the biodegradable sheet according to the present invention includes a base layer 110, an adhesive layer 120, and a fabric layer 130 from below. At this time, at least one of the adhesive layer 120 and the fabric layer 130 includes a PLA resin.

In addition, in the biodegradable sheet according to the present invention, as shown in FIG. 2, the printing layer 140 may be further formed on the fabric layer 130 of the biodegradable sheet of FIG. 1. At this time, at least one of the adhesive layer 120 and the fabric layer 130 includes a PLA resin.

In addition, in the biodegradable sheet according to the present invention, as shown in FIG. 3, the surface treatment layer 150 may be further formed on the printed layer 140 of the biodegradable sheet of FIG. 2. At this time, at least one of the adhesive layer 120 and the fabric layer 130 includes a PLA resin.

The PLA resin may be prepared by polymerizing lactic acid produced by fermenting starch extracted from corn, potato or the like as a lactide or a thermoplastic polyester of lactic acid. Since the corn, potatoes and the like are a renewable plant resource, the PLA resin that can be obtained from them can effectively cope with problems caused by depletion of petroleum resources.

In addition, the PLA resin is environmentally friendly in that the emission of environmentally harmful substances such as CO ₂ is much lower than that of petroleum-based materials such as polyvinyl chloride (PVC) during use or disposal, .

The PLA resin can be divided into a crystalline PLA (c-PLA) resin and an amorphous PLA (a-PLA) resin. At this time, in the case of the crystalline PLA resin, it is preferable to use an amorphous PLA resin because a bleeding phenomenon in which the plasticizer flows out to the sheet surface may occur. When an amorphous PLA resin is used, there is an advantage that a compatibilizer which is essentially added to prevent bleeding phenomenon is not added. When an amorphous PLA resin is used, it is most preferable to use a 100% amorphous PLA resin as the PLA resin, and a PLA resin in which crystalline and amorphous coexist can be used, if necessary.

The biodegradable sheet of the present invention may use any one of a sol-type PLA resin, a resin in which the PLA resin and the bio resin is blended, and a resin in which the PLA resin and the synthetic resin are blended.

First, the biodegradable sheet of the present invention may use a sol-type PLA resin, the sol-type PLA resin is added to the PLA solution made by adding the PLA resin to the volatile solvent, and then remove the volatile solvent by the drying process Or by adding a plasticizer to the PLA resin in pellet or powder form.

In addition, the biodegradable sheet of the present invention may use a resin blended PLA resin and bio resin, wherein the bio resin is not limited if it has biodegradability, in particular cellulose (Cellulose), chitin (Chitin), starch (Starch), Poly Hydroxyl Alkanoate (PHA), Hydroxy Butyrate Valerate (PHBV), Poly Vinyl Alcohol (PVA), Poly Glycolic Acid (PGA), Poly Butylene Succinate (PBS), Poly Butyleneadipate-co-Butylene Succinate (PBSA), At least one resin selected from polybutylene adiate terephthalate (PBAT), poly capro lactone (PCL), poly (ester-amide) (poly) and poly (ester-urethane) (poly (ester-urethane)) Is preferable in view of compatibility with PLA resin and biodegradability.

The resin in which the PLA resin and the bio resin are blended preferably includes 10 to 70 parts by weight of the bio resin based on 100 parts by weight of the PLA resin. When the bio resin is less than 10 parts by weight, it is difficult to expect the effect of the blend, and when it exceeds 70 parts by weight, compatibility with other additives may be a problem.

In addition, the biodegradable sheet of the present invention may use a resin blended PLA resin and synthetic resin, wherein the synthetic resin is PVC (polyvinyl chloride), PEG (polyethylene glycol), EVA (ethylene vinyl acetate), TPE (thermo plastic) Elastomers (TPU), Thermoplastic Polyurethane (TPU), Thermoplastic Starch (TPS), ENR (epoxidized naturalrubber), Ionomers, SBS (styrene butadiene styren), NBR (nitrilebutadiene rubber), SEBS (styrene ethylene butylenes styrene), Acrylic Compatibility with PLA resin is at least one selected from acrylate, acrylonitrile butadiene styrene, polyolefin modified with compatibilizer, PU, polyamide, and polyester. It is preferable in terms of biodegradability.

It is preferable that the PLA resin and the resin blended resin include 10 to 70 parts by weight of synthetic resin based on 100 parts by weight of PLA resin. If the synthetic resin is less than 10 parts by weight, it is difficult to expect the effect of the blend, if it exceeds 70 parts by weight compatibility with other additives may be a problem, and the intended biodegradation effect is difficult to obtain.

Hereinafter, the substrate layer 110, the adhesive layer 120, the fabric layer 130, the print layer 140, and the surface treatment layer 150 illustrated in FIGS. 1 to 3 will be described.

As shown in FIG. 1, the biodegradable sheet of the present invention most basically includes a base layer 110, an adhesive layer 120, and a fabric layer 130.

In the present invention, the base layer 110 is the most basic layer of the sheet, and supports the adhesive layer 120, the fabric layer 130, and the like on the upper side.

The base layer 110 may use a general substrate known in the art to which the present invention belongs, without limitation, for example, but not limited to imitation paper, non-woven fabric, cotton fabric.

In the case of imitation paper, it is composed of pulp, and in the case of nonwoven fabric, it has a composite composition of pulp and polyester.

The basis weight of the imitation paper, the nonwoven fabric, and the cotton fabric constituting the base layer 110 is preferably 80 to 200 g / m ² . If the basis weight of the base layer is less than 80 g / m ² , there is a risk of damage such as tearing of the sheet during the construction or use process, if the base weight exceeds 200 g / m ² , the substrate becomes heavy, gaps and curling phenomenon It is difficult to construct due to occurrence.

In the present invention, the adhesive layer 120 formed on the base layer 110 may enable the fabric layer 130 and the base layer 110 formed thereon to form a laminated structure, and include a biodegradable PLA resin. By doing so, it is environmentally friendly.

The adhesive layer 120 preferably comprises 10 to 40% by weight of PLA resin, 60 to 90% by weight of the solvent, the solvent is methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), acetone (acetone), At least one of ethyl alcohol is preferable.

In the present invention, the fabric layer 130 formed on the adhesive layer 120 is formed by injecting PLA resin into the fiber form.

There are two methods for manufacturing the fabric layer using PLA resin, which are obtained by weaving or knitting PLA yarn or by preparing PLA short fibers into nonwoven fabric.

As shown in FIG. 2, the biodegradable sheet of the present invention may further include a print layer 140 on the fabric layer 130.

In the present invention, the printing layer 140 formed on the fabric layer 130 may be provided with various patterns and / or colors to the sheet, thereby further improving the aesthetic effect. At this time, the method for forming the print layer 140 is not particularly limited, and for example, it may be formed using a known printing method such as gravure printing, transfer printing, digital printing or rotary printing.

The printing layer 140 of the present invention may be based on a real-life printing or a transfer printing method, by using a known photo-realistic printing method or a transfer method such as inkjet printing, it may also give a more realistic and simple aesthetic effect.

As shown in FIG. 3, the biodegradable sheet of the present invention may further include a surface treatment layer 150 on the printed layer 140.

The surface treatment layer 150 of the present invention is formed on the print layer 140 to improve the durability of the sheet, and serves to protect the print layer 140 and the fabric layer 130.

The surface treatment layer 150 of the present invention may be formed using a resin having a transparent property such as an acrylic resin and a urethane resin.

Example  And In a comparative example  Of sheet by

Hereinafter, the production examples of the sheet according to the preferred embodiment of the present invention and the production examples according to the comparative example. However, this is presented as a preferred example of the present invention, and in no sense can be construed as limiting the present invention.

The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example

Manufacturing method of each layer

1. Base layer

A nonwoven fabric made of 70% pulp and 30% polyester was prepared to prepare a base layer.

2. Formation of Adhesive Layer

PLA resin and methyl ethyl ketone were mixed at 80 ° C. in a ratio of 40% by weight and 60% by weight, respectively, to prepare a PLA resin paste for an adhesive layer.

3. Formation of the fabric layer

It was prepared by weaving PLA 100% yarn.

4. Formation of Printed Layer

Water-based ink pigments and oil-based ink pigments were mixed for each printing frequency, and a printed pattern was formed on the resin layer by using a transfer printing method.

5. Formation of Surface Treatment Layer

Acrylic resin and methyl ethyl ketone were mixed at 20 wt% and 80 wt%, respectively, to prepare a coating solution for surface treatment.

Example  1 to 10

The layer structure was adopted as shown in Table 1 below, and the biodegradable sheets of Examples 1 to 10 were prepared by sequentially laminating from the left side.

On the other hand, the embodiment using the PLA resin blended with the bio resin, or blended with a synthetic resin is shown in Table 1 below, the composition ratio is also shown.

Substrate layer Adhesive layer Fabric layer Printing layer Surface Treatment Layer Example 1 O O
O
Example 2 O
O
PLA 100 parts by weight
PBS 30 parts by weight O
PLA 100 parts by weight
PBS 30 parts by weight Example 3 O
O
PLA 100 parts by weight
30 parts by weight of PVC O
PLA 100 parts by weight
30 parts by weight of PVC Example 4 O O
O
O
O

Comparative example

A commercially available PVC silk sheet was prepared by preparing a base layer made of 100% pulp, and coating and drying a paste containing a PVC resin on the base layer.

evaluation

The sheets according to Examples 1 to 5 and Comparative Examples were evaluated and prepared for the items in Table 2 below.

Dimensional stability Moisture permeability Light fastness TVOC Example 1 ○ ○ ○ ○ Example 2 △ ○ △ ○ Example 3 ○ △ ○ ○ Example 4 ○ ○ ○ ○ Comparative example ○ ○ ○ △

The dimensional stability is the shrinkage of the length difference measured after immersing the specimen in a water bath after leaving it in an oven at 80 ° C. The standard is less than 2.0% for good (○), 2.0 to 2.2% for moderate (△), 2.2 More than% is rated bad (X).

Moisture permeability is the amount that moisture moves to a product, and 175g / m <2> * 24hr or more is evaluated as good ((circle)), and less than 175g / m <2> * 24hr is evaluated as bad (X).

Daylight fastness is evaluated as good (○) and less than 4 as bad (X) based on KS M 7305.

Eco-friendliness refers to the amount of TVOC (volatile organic compound) and HCHO (formaldehyde) emission levels. h or HCHO of 0.013 to 0.017 mg / m 2 · h ordinarily (Δ), 0.1 mg / m 2 · h or more and HCHO of 0.015 mg / m 2 · h or more are evaluated as poor (X).

In view of the above evaluation results, the biodegradable sheet according to the present invention can be seen that the dimensional stability, moisture permeability, daylight fastness is very good enough to replace the existing PVC sheet, the transfer of TVOC (total volatile organic compounds) Remarkably less than PVC, it can be seen that the environmental friendliness is excellent.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments and can be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

110: substrate layer
120: foam layer
130: printed layer
140: partially foamed layer
150: Surface treatment layer

Claims (11)

A base layer;
An adhesive layer formed on the base layer; And
And a fabric layer formed on the adhesive layer.
The adhesive layer and the fabric layer, each comprising c-PLA and a-PLA blended resin or a-PLA resin,
The fabric layer is a biodegradable sheet, characterized in that weaving by injecting a resin blended c-PLA and a-PLA or a-PLA resin in the form of fibers.
A base layer;
An adhesive layer formed on the base layer;
A fabric layer formed on the adhesive layer; And
It includes; Printed layer formed on the fabric layer;
The adhesive layer and the fabric layer, each comprising c-PLA and a-PLA blended resin or a-PLA resin,
The fabric layer is a biodegradable sheet, characterized in that weaving by injecting a resin blended c-PLA and a-PLA or a-PLA resin in the form of fibers.
A base layer;
An adhesive layer formed on the base layer;
A fabric layer formed on the adhesive layer;
A printing layer formed on the fabric layer; And
And a surface treatment layer formed on the printed layer.
The adhesive layer and the fabric layer, each comprising c-PLA and a-PLA blended resin or a-PLA resin,
The fabric layer is a biodegradable sheet, characterized in that weaving by injecting a resin blended c-PLA and a-PLA or a-PLA resin in the form of fibers.
4. The method according to any one of claims 1 to 3,
The c-PLA and a-PLA blended resin or a-PLA resin is a biodegradable sheet characterized in that it uses a sol form.
4. The method according to any one of claims 1 to 3,
At least one of the adhesive layer and the fabric layer biodegradable sheet, characterized in that the c-PLA and a-PLA blended resin or a-PLA resin blended with a bio resin blended resin.
6. The method of claim 5,
The bio resin is cellulose (Cellulose), chitin (Chitin), starch (Starch), PHA (Poly Hydroxyl Alkanoate), PHBV (Hydroxy Butyrate Valerate), PVA (Poly Vinyl Alcohol), PGA (Poly Glycolic Acid), PBS (Poly) Butylene Succinate (PBSA), Poly Butyleneadipate-co-Butylene Succinate (PBSA), Poly Butylene Adipate Terephthalate (PBAT), Poly Capro Lactone (PCL), Poly (Ester-Amide) and Poly (Ester-Urethane) Biodegradable sheet, characterized in that at least one resin selected from (Poly (Ester-Urethane)).
4. The method according to any one of claims 1 to 3,
At least one of the adhesive layer and the fabric layer is a biodegradable sheet, characterized in that the resin blended the c-PLA and a-PLA or a resin blended a-PLA resin.
8. The method of claim 7,
The synthetic resin is PVC (polyvinyl chloride), PEG (polyethylene glycol), EVA (ethylene vinyl acetate), TPE (thermoplastic elastomer), TPU (thermoplastic polyurethane), TPS (thermo plastic starch), ENR (epoxidized naturalrubber), ionomer Polyolefin modified with compatibilizer including ionomer, styrene butadiene styren, SBR, nitrilebutadiene rubber, NBR ), PU (polyurethane), polyamide, biodegradable sheet characterized in that at least one resin selected from polyester.
4. The method according to any one of claims 1 to 3,
The fabric layer is biodegradable sheet, characterized in that consisting of only a resin or a-PLA blended c-PLA and a-PLA.
4. The method according to any one of claims 1 to 3,
The adhesive layer is a biodegradable sheet comprising c-PLA and a-PLA blended resin or a-PLA resin 10 to 40% by weight, solvent 60 to 90% by weight.
The method of claim 10,
The solvent is a biodegradable sheet, characterized in that any one or more of MEK (methyl ethyl ketone), MIBK (methyl isobutyl ketone), acetone (acetone), ethyl alcohol (ethyl alcohol).

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