# US 9,751,654 B2 · Thermoplastic containers with improved aesthetics

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- Number: US 9,751,654 B2
- Document ID: US9751654B2
- Status: Granted
- Kind: B2
- Application number: 14/460,501
- Filed: 2014-08-15
- Published: 2015-02-19
- Granted: 2017-09-05
- Earliest claimed: 2013-08-16
- Assignees: The Procter & Gamble Company
- Applicants: The Procter & Gamble Company
- Inventors: Ping Wang; Liang Yang; Chunfang Song
- Web page: https://patentgrep.com/patent/US9751654B2

## CPC

- B29C 49/04: Extrusion blow-moulding
- B29C 49/0005: {characterised by the material}
- B29C 49/06: Injection blow-moulding
- B29C 49/22: using multilayered preforms or parisons
- B29C 49/48: Moulds
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/08: of synthetic resin
- B32B 27/18: characterised by the use of special additives
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 27/322: {comprising halogenated polyolefins, e.g. PTFE}
- B65D 1/40: Details of walls (other container details B65D23/00, B65D25/00)
- B29C 2049/023: {using inherent heat of the preform, i.e. 1 step blow moulding}
- B29C 2949/30: Preforms or parisons made of several components
- B29K 2023/04: {Polymers of ethylene}
- B29K 2023/06: {PE, i.e. polyethylene}
- B29K 2023/10: {Polymers of propylene}
- B29K 2023/12: {PP, i.e. polypropylene}
- B29K 2105/0005: {containing compounding ingredients (releasing, lubricating or separating agents B29C33/56, fibers B29K2105/08, B29K2105/12; fillers B29K2105/16, recycled material B29K2105/26)}
- B29K 2105/258: {Tubular}
- B29K 2995/0073: smooth
- B29L 2031/712: {Containers; Packaging elements or accessories, Packages (closures therefor B29L2031/56; ink or toner cartridges B29L2031/7678; squeeze tubes B29L2023/20; suitcases B29L2031/7418)}
- B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers
- B32B 2307/406: Bright, glossy, shiny surface
- B32B 2307/412: Transparent
- B32B 2307/414: Translucent
- B32B 2307/518: bi-axially
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2439/00: Containers; Receptacles
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A thermoplastic material and an additive that has a relatively low surface tension, allows for blow molding processing conditions that provides containers with a smooth exterior surfaces to enhance aesthetics.

## Claims

### Claim 1

A blow molding process of making a container, comprising the steps of:
a) affixing a precursor container form into a blow molding mold, wherein said precursor container form is a parison or preform,
i) wherein said precursor container form comprises a layer, wherein said layer comprises:
1) from about 86% to about 99.99%, by weight of said layer, of a thermoplastic material selected from the group consisting of polyethylene (PE), polypropylene (PP), and a combination thereof; and
2) from about 0.01% to about 5%, by weight of said layer, of an additive, wherein said additive has a Surface Tension Value of from about 0.1 to about 50 m*N/m; and
ii) wherein said mold comprises an inner surface configured to receive the expandable precursor container form, wherein at least a portion of said mold has a SPI finish standard selected from the group consisting of A-1, A-2, A-3, B-1, B-2, and B -3; and
b) blowing into said precursor container form as to expand said precursor container form against said inner surface of said mold thereby forming the container.

### Claim 2 (depends on 1)

The process according to claim 1, wherein said portion of said mold has a SPI finish standard selected from the group consisting of A-1, A-2, and A-3.

### Claim 3 (depends on 1)

The process according to claim 1, wherein said mold is not sandblasted.

### Claim 4 (depends on 1)

The process according to claim 1, wherein said inner surface of said mold has a first portion and a second portion, wherein said first portion has a higher grade of smoothness in terms of SPI finish standard than said second portion.

### Claim 5 (depends on 1)

The process according to claim 1, further comprising the step of forming said precursor container form by mixing said thermoplastic material and said additive to form a blow mold blend, and then extruding said blow mold blend to form said precursor container form, wherein said precursor container form is a parison.

### Claim 6 (depends on 5)

The process according to claim 5, further comprising the step of first mixing said additive with a carrier to form a masterbatch, and then mixing said masterbatch with said thermoplastic material to form a blow mold blend, wherein said masterbatch comprises from about 10% to about 30%, by weight of said masterbatch, of said additive, and wherein said carrier is the same material as said thermoplastic material.

### Claim 7 (depends on 1)

The process according to claim 1, wherein said precursor container form comprises multiple layers, wherein said layer of claim 1 is the outermost layer of said multiple layers.

### Claim 8 (depends on 1)

The process according to claim 1, wherein said thermoplastic material is PP.

### Claim 9 (depends on 1)

The process according to claim 1, wherein said additive is selected from the group consisting of an alcohol, oil, fluoropolymer, siloxane fluid, and a combination thereof.

### Claim 10 (depends on 1)

The process according to claim 1, wherein said additive is an alcohol selected from the group consisting of ethylene glycol, propylene glycol, glycerol, butanediol, poly(propylene glycol), derivatives thereof, and a combination thereof.

### Claim 11 (depends on 1)

The process according to claim 1, wherein said additive is a plant oil selected from the group consisting of sesame oil, soybean oil, peanut oil, olive oil, castor oil, cotton seed oil, palm oil, canola oil, safflower oil, sunflower oil, corn oil, tall oil, rice bran oil, derivatives thereof, and a combination thereof.

### Claim 12 (depends on 1)

The process according to claim 1, wherein said additive is a fluoropolymer or a siloxane fluid having a viscosity of about 20 cst to about 1,000,000 cst at a temperature of 25° C.