KR101431059B1 - Plastic sheet having improved tensile strength and flexural strength - Google Patents

Plastic sheet having improved tensile strength and flexural strength Download PDF

Info

Publication number
KR101431059B1
KR101431059B1 KR1020140014228A KR20140014228A KR101431059B1 KR 101431059 B1 KR101431059 B1 KR 101431059B1 KR 1020140014228 A KR1020140014228 A KR 1020140014228A KR 20140014228 A KR20140014228 A KR 20140014228A KR 101431059 B1 KR101431059 B1 KR 101431059B1
Authority
KR
South Korea
Prior art keywords
acrylonitrile
butadiene
layer
plastic sheet
styrene
Prior art date
Application number
KR1020140014228A
Other languages
Korean (ko)
Inventor
이충환
공주열
김연묵
Original Assignee
주식회사 성곡
신일산업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 성곡, 신일산업 주식회사 filed Critical 주식회사 성곡
Priority to KR1020140014228A priority Critical patent/KR101431059B1/en
Application granted granted Critical
Publication of KR101431059B1 publication Critical patent/KR101431059B1/en

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/30Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00Layers arrangement
    • B32B2250/24All layers being polymeric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54Yield strength; Tensile strength

Abstract

The present invention relates to an upper layer (10) containing an acrylonitrile-butadiene-styrene resin (ABS) as an active ingredient; An intermediate layer 20 containing, as an active ingredient, a mixture of acrylonitrile-butadiene-styrene resin and styrene acrylonitrile copolymers (SAN); Butadiene-styrene resin (ABS, Acrylonitrile-butadiene-styrene resin) as an effective component, and the total layer weight of the acrylonitrile-butadiene-styrene resin 63 to 77 And 23 to 27% by weight of a styrene acrylonitrile polymer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a plastic sheet having improved tensile strength and flexural strength,

TECHNICAL FIELD The present invention relates to a plastic sheet, and more particularly, to a plastic sheet having excellent tensile strength, bending strength, or flexural modulus, and thus having excellent bending, warping, or elasticity.

The plastic sheet refers to a material having a thickness of at least 50 袖 m which is produced by molding various synthetic resins as a raw material by a melt extrusion method or a calendar method. The resins used are ABS (acrylonitrile butadiene styrene), PS (including polystyrene: impact resistance grade), PP (polypropylene), PE (polyethylene), PET (polyethylene terephthalate), PVC (polyvinyl chloride) PMMA (polymethylmethacrylate), PC (polycarbonate), and the like. Background Art [0002] Plastic sheets are widely used in various industrial fields such as food containers which are widely used in everyday life, insulation of electrical appliances and other air conditioners due to their low manufacturing cost, low risk of breakage, and light weight.

ABS (acrylonitrile butadiene styrene) resin consists of three components acrylonitrile (A), butadiene (B) and styrene (S), and styrene-acrylonitrile copolymer is copolymerized with SBR and NBR And graft polymerization with thienes. ABS resin is excellent in impact resistance, chemical resistance, weather resistance and the like. Also, compatibility with other resins is good, and blends with polystyrene acrylonitrile polymers and polycarbonates are also carried out. ABS resin is widely used for automobile parts such as VCR, TV, radio, electric parts such as front grill, clam cover, office equipment and miscellaneous goods.

Prior art relating to such a plastic sheet using ABS is disclosed in Korean Patent Laid-Open No. 10-2012-0048827 (ABS resin composition capable of maintaining high gloss during thermoforming and ABS sheet using the same), Korean Patent Laid- 0061833 (a method for producing an ABS sheet and an ABS sheet produced thereby), and a study on the amount of change in the thickness of an ABS sheet during vacuum forming (Korean Society of Precision Engineering 2002 Fall Conference pp663 ~ 666).

However, the plastic sheet made only of the ABS resin is advantageous in that it has high impact resistance, but it has a problem in warpage or warpage in the product due to low tensile strength, flexural strength, or flexural modulus. Accordingly, the inventors of the present invention have made intensive studies to make a plastic sheet resistant to bending or twisting by improving the tensile strength, flexural strength, or flexural modulus of the ABS resin, thereby completing the present invention.

The object of the present invention is to provide a plastic sheet having high tensile strength, bending strength, or flexural modulus, and which is excellent in bending and warping of a post-formed tray.

It is another object of the present invention to provide a plastic sheet excellent in moldability and also excellent in scratch resistance and impact resistance.

In order to accomplish the above object, the present invention provides an upper layer 10 comprising an acrylonitrile-butadiene-styrene resin (ABS) as an active ingredient; An intermediate layer 20 containing, as an active ingredient, a mixture of acrylonitrile-butadiene-styrene resin and styrene acrylonitrile copolymers (SAN); Butadiene-styrene resin (ABS, Acrylonitrile-butadiene-styrene resin) as an effective component, and the total layer weight of the acrylonitrile-butadiene-styrene resin 63 to 77 And 23 to 27% by weight of a styrene acrylonitrile polymer.

Also, the present invention provides a plastic sheet, wherein the intermediate layer (20) is a mixture of acrylonitrile-butadiene-styrene resin and styrene acrylonitrile polymer in a weight ratio of 5: 7: 3 to 5.

The thickness of the upper layer 10 is 10 to 20% of the total thickness, the thickness of the intermediate layer 20 is 60 to 80% of the total thickness of the lower layer 30, And a thickness of 10 to 20% of the thickness of the plastic sheet.

Since the plastic laminated sheet of the present invention has a very high tensile strength, flexural strength or flexural modulus, it has excellent strength, which is an essential requirement of a tray, which is a packaging container for various electronic products and various industrial parts after molding. And can be used in various ways. Further, the plastic sheet of the present invention can be easily molded into various shapes, and the finished product is excellent in quality.

1, the plastic sheet of the present invention comprises an upper layer 10 containing an acrylonitrile-butadiene-styrene resin (ABS) as an active ingredient; An intermediate layer 20 containing, as an active ingredient, a mixture of acrylonitrile-butadiene-styrene resin and styrene acrylonitrile copolymers (SAN); And a lower layer 30 containing an acrylonitrile-butadiene-styrene resin (ABS, acrylonitrile-butadiene-styrene resin) as an active ingredient.

Styrene acrylonitrile copolymers (SAN) are polymers made by polymerizing styrene, an aromatic hydrocarbon, and acrylonitrile, which is an unsaturated nitrile, and are excellent in transparency, thermal deformation, chemical resistance and gloss. Therefore, when styrene acrylonitrile polymer is added to acrylonitrile-butadiene-styrene resin, heat change is increased, and when the product is heated by molding, it becomes easier to mold into a desired shape. However, with the addition of the styrene acrylonitrile polymer, scratch resistance, impact resistance, and the like are somewhat reduced, resulting in a problem that the quality of the product is somewhat deteriorated.

Accordingly, in order to solve the above problems, the present invention has been made to solve the above problems at the upper and lower portions of the intermediate layer 20 containing a mixture of acrylonitrile-butadiene-styrene resin and styrene acrylonitrile copolymers (SAN) An upper layer 10 and a lower layer 30 each containing an acrylonitrile-butadiene-styrene resin (ABS) as an active ingredient are laminated. Accordingly, the plastic sheet of the present invention has not only a very high tensile strength, flexural strength or flexural modulus, but also excellent impact resistance and scratch resistance.

In this case, it is preferable that the acrylonitrile-butadiene-styrene resin is contained in an amount of 63 to 77% by weight and the styrene acrylonitrile polymer is contained in an amount of 23 to 27% by weight in the total weight of the sheet. When the above range is satisfied, it is possible to effectively increase the tensile strength, flexural strength or flexural modulus while maintaining excellent impact resistance and scratch resistance.

Preferably, the intermediate layer 20 is prepared by mixing acrylonitrile-butadiene-styrene resin and styrene acrylonitrile polymer in a weight ratio of 5 to 7: 3 to 5. When the acrylonitrile-butadiene-styrene resin and the styrene acrylonitrile polymer satisfy the above-mentioned weight ratio, the tensile strength, the flexural strength or the flexural modulus can be effectively increased while maintaining excellent impact resistance and scratch resistance.

Preferably, the thickness of the upper layer 10 is 10 to 20% of the total thickness, the thickness of the intermediate layer 20 is 60 to 80% of the total thickness, Is preferably 10 to 20% of the total thickness. When the thickness range is satisfied, the tensile strength and flexural strength or flexural modulus can be effectively increased while maintaining excellent impact resistance and scratch resistance.

On the other hand, the method for producing the plastic sheet of the present invention is not particularly limited, and can be formed by a method commonly used in the technical field of the present invention, for example, a melt extrusion method or a calendar method. For example, each of the layers may be formed by a melt extrusion method, and then hot-pressed to finally produce a laminated sheet.

The plastic sheet of the present invention may further contain additives commonly used in the art to which the present invention belongs. For example, a slip agent, a conductive coating liquid, a pigment, and the like may be further added to the upper layer 10, the intermediate layer 20, and the lower layer 30 to impart functionality.

The plastic sheet of the present invention has a high bending strength, tensile strength, or flexural modulus, and therefore has excellent moldability. As a result, the product is excellent in workability by preventing bending and twisting during molding.

In addition, the plastic sheet of the present invention is excellent in moldability, scratch resistance and impact resistance, and can produce high quality products. Therefore, the plastic sheet of the present invention can be used in various industrial fields (for example, electronic products, electronic parts, food containers, trays, etc.).

1 is a sectional view of a plastic laminated sheet of the present invention.

Hereinafter, the structure of the present invention will be described in detail with reference to the following examples, but the scope of the present invention is not limited to the following examples, but includes modifications of equivalent technical ideas.

Example: Preparation of plastic sheet

An upper layer sheet 10 containing an acrylonitrile-butadiene-styrene resin (ABS) as an active ingredient, an acrylonitrile-butadiene-styrene resin, and styrene acrylate An intermediate layer sheet 20 in which styrene acrylonitrile copolymers (SAN) are mixed at a weight ratio of 6: 4, and a lower layer containing an acrylonitrile-butadiene-styrene resin (ABS) After the sheet 30 was produced, each of the sheets 30 was hot-pressed to produce a three-layered laminated sheet. At this time, the temperature at the time of melt extrusion was maintained at 200 to 250 캜, and the temperature at the time of hot pressing was maintained at 50 to 100 캜. At this time, the thickness of the upper layer sheet 10 was 0.15 mm, the thickness of the intermediate layer sheet 20 was 0.7 mm, and the thickness of the lower layer sheet 30 was 0.15 mm. In the finally produced sheet, the ABS resin was 70% by weight, the SAN polymer was 25% by weight, and the other components (slip agent, conductive coating liquid, pigment material, etc.) were 5% by weight.

Comparative Example: Production of plastic sheet

A plastic sheet made of ABS alone was produced by using a melt extruder. At this time, the temperature during melt extrusion was maintained at 200 to 250 캜.

Experimental Example 1: Measurement of tensile strength and elongation

Tensile strength and elongation were measured according to ASTM D638 for the plastic sheets of Examples and Comparative Examples. At this time, the test condition was 50 mm / min.

Tensile strength (Kgf / cm 2 ) Elongation (%) Example 613.14 9.87 Comparative Example 419.82 17.25

According to the above Table 1, it was found that the tensile strength of the plastic sheet of the examples was much greater than that of the plastic sheet of the ABS alone, and the elongation was greatly reduced.

Experimental Example 2: Measurement of flexural strength and flexural modulus

The flexural strength and flexural modulus of the plastic sheets of Examples and Comparative Examples were measured according to the ASTM D790 method. At this time, the test condition was 15 mm / min.

Flexural strength (Kgf / cm 2 ) Flexural modulus (Kg / cm 2 ) Example 707.81 46875.00 Comparative Example 504.17 36458.33

According to Table 2, it was found that the flexural strength and the flexural modulus of the plastic sheet of the examples significantly increased as compared with the plastic sheet of ABS of the comparative example.

Experimental Example 3: Measurement of Impact Strength and Surface Resistance

According to the ASTM D6110 method, the plastic sheets of Examples and Comparative Examples were coated with CHARPY The impact strength was measured. At this time, the test conditions were 1/8 "and 23 ° C. Also, the surface resistance was measured according to the ASTM D257 method.

Impact strength (Kg · cm / cm) Surface Resistance (Ω) Example 16.13 6.4 Comparative Example 18.16 6.1

According to the above Table 3, the impact strength and the surface resistance of the plastic sheet of the example are not significantly different from those of the plastic sheet of the comparative example ABS alone.

Taken together, the plastic sheet of the present invention has a very high tensile strength, flexural strength, or flexural modulus, and is thus excellent in moldability, and has an impact resistance and surface resistance equal to or higher than those of a conventional plastic sheet made only of ABS, It is expected to be wide.

Claims (3)

  1. An upper layer 10 containing an acrylonitrile-butadiene-styrene resin (ABS, acrylonitrile-butadiene-styrene resin) as an active ingredient;
    An intermediate layer 20 containing, as an active ingredient, a mixture of acrylonitrile-butadiene-styrene resin and styrene acrylonitrile copolymers (SAN); And
    Has a laminated structure of a lower layer (30) containing an acrylonitrile-butadiene-styrene resin (ABS, acrylonitrile-butadiene-styrene resin)
    Wherein the total weight of the sheet is from 63 to 77% by weight of an acrylonitrile-butadiene-styrene resin and from 23 to 27% by weight of a styrene acrylonitrile polymer.
  2. The method according to claim 1,
    The intermediate layer (20)
    Wherein the acrylonitrile-butadiene-styrene resin and the styrene acrylonitrile polymer are mixed in a weight ratio of 5 to 7: 3 to 5.
  3. The method according to claim 1,
    The thickness of the upper layer 10 accounts for 10 to 20% of the total thickness,
    The thickness of the intermediate layer 20 accounts for 60 to 80% of the total thickness,
    Wherein the thickness of the lower layer (30) accounts for 10 to 20% of the total thickness.
KR1020140014228A 2014-02-07 2014-02-07 Plastic sheet having improved tensile strength and flexural strength KR101431059B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140014228A KR101431059B1 (en) 2014-02-07 2014-02-07 Plastic sheet having improved tensile strength and flexural strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140014228A KR101431059B1 (en) 2014-02-07 2014-02-07 Plastic sheet having improved tensile strength and flexural strength

Publications (1)

Publication Number Publication Date
KR101431059B1 true KR101431059B1 (en) 2014-09-26

Family

ID=51758750

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140014228A KR101431059B1 (en) 2014-02-07 2014-02-07 Plastic sheet having improved tensile strength and flexural strength

Country Status (1)

Country Link
KR (1) KR101431059B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08136117A (en) * 1994-11-11 1996-05-31 Cheil Ind Inc Multilayer sheet for interiorly finishing refrigerator having excellent glossiness and chemical resistance
JP2005041972A (en) 2003-07-28 2005-02-17 Chisso Corp Abs resin sheet
KR20080023537A (en) * 2006-09-11 2008-03-14 주식회사 엘지화학 Multilayer extruded sheet
JP2008510636A (en) 2004-08-27 2008-04-10 レオンハード クルツ ゲーエムベーハー ウント コー.カーゲー Decorative injection molded article, manufacturing process thereof, and use of transfer film in the process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08136117A (en) * 1994-11-11 1996-05-31 Cheil Ind Inc Multilayer sheet for interiorly finishing refrigerator having excellent glossiness and chemical resistance
JP2005041972A (en) 2003-07-28 2005-02-17 Chisso Corp Abs resin sheet
JP2008510636A (en) 2004-08-27 2008-04-10 レオンハード クルツ ゲーエムベーハー ウント コー.カーゲー Decorative injection molded article, manufacturing process thereof, and use of transfer film in the process
KR20080023537A (en) * 2006-09-11 2008-03-14 주식회사 엘지화학 Multilayer extruded sheet

Similar Documents

Publication Publication Date Title
KR100253955B1 (en) Polyolefin resin composition, process for the preparation thereof and molded article made thereof
US8946337B2 (en) Thermoplastic resin composition and molded product using the same
CN102532853B (en) High-hardness and scratch-resistant modified PC (Poly Carbonate) material and preparation method thereof
JP2014169446A (en) Propylene resin composition for stretched sheet, and stretched sheet and thermo-formed body including the same
EP0022979B2 (en) Thermoplastic resin composition having good heat cycle property
CN103890093B (en) The Polycarbonate flame retardant resin combination of glass fiber reinforcement
KR101144111B1 (en) Polypropylene complex resin composition implementing the outward fiber-appearance
US8546469B2 (en) Glass fiber-reinforced polyester resin composition and molded product using the same
KR101197105B1 (en) Resin composition, molding thereof and process for producing the same
US4229504A (en) Polyolefin composition having high impact resistance and high temperature flow resistance
KR101599956B1 (en) Thermoplastic resin composition and molded article using the same
EP1813648B1 (en) Flame-retardant biodegradable polyester resin composition, process for producing the same, and molded object obtained therefrom
JP5692071B2 (en) Polyester resin composition
KR100665803B1 (en) Thermoplastic Resin Composition for Refrigerator Having Improved Environmental Stress Crack Resistance
KR20130130725A (en) Methacrylic resin composition, resin modifier, and molded body
CN102015888B (en) Heat resistant polylactic acid compounds
WO2001040377A1 (en) Thermoplastic compositions having high dimensional stability
BRPI0409027B1 (en) polymer blends, thermoformed parts, wire and cable caps and processes for making a thermoformed part and to decrease gloss and / or thermoform temperature in a thermoformed part
CN1198451A (en) Laminated sheet material or laminated film and moulded products thereof
AU2006286869A1 (en) Molding-compositions composed of filler-reinforced thermoplastic material with very good scratch resistance and soft-touch feel
KR101892331B1 (en) Resin composite material
ES2564402T3 (en) Thermoformable composition essentially of biological base and containers formed therefrom
US20020123572A1 (en) Polyolefin-based composite resin composition having high strength and low linear expansion
CN102051018B (en) Thermoplastic elastomer for being subjected to secondary injection adhesion with PBT (polybutylene terephthalate) material and composite molding product using same
CN103517944B (en) Soft polyolefin compositions and its high filled composite

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20180725

Year of fee payment: 5