Batch inclusion packages

• US 5,674,944 A
• Filed: 06/07/1995
• Issued: 10/07/1997
• Est. Priority Date: 09/08/1993
• Status: Expired due to Fees

• Current Assignee: The Dow Chemical Company (Dow, Inc.)
• Original Assignee: The Dow Chemical Company (Dow, Inc.)
• Inventors: Walker, Debbie-Lee, Falla, Daniel James
• Primary Examiner(s): WU, DAVID WEI HSIUNG
• Application Number:
  US08/475,735
• Time in Patent Office: 853 Days
• Field of Search: 428/516, 428/518, 428/523, 525/239, 525/240, 525/317, 525/322
• US Class Current: 525/239
• CPC Class Codes: C08J 2323/08 Copolymers of ethene C08J2323/16 takes precedence
• CPC Class Codes: C08J 3/223 Packed additives
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/3192 Next to vinyl or vinylidene chloride polymer
• CPC Class Codes: Y10T 428/31938 Polymer of monoethylenically unsaturated hydrocarbon

Abstract

Batch inclusion packages made from films and film structures are disclosed. The films and film structures have at least one layer of at least one substantially linear ethylene/α-olefin polymer. The batch inclusion packages are useful in wrapping or containing various materials, such as carbon black, titanium dioxide, and rubber compounding ingredients.

Claims

1. A batch inclusion package comprising

(A) an ingredient to be packaged by

(B) a protective film comprising at least one layer of at least one substantially linear ethylene/α

-olefin polymer,

wherein the ingredient (A) is discreet from the protective film (B) but wherein the ingredient (A) and the protective film (B) are incorporated into a final article, and wherein the substantially linear ethylene/α

-olefin polymer is characterized as having;

a) a melt flow ratio, I₁₀ /I₂, ≧

5.63,

b) a molecular weight distribution, M_w /M_n, defined by the equation;

M_w /M_n ≦

(I₁₀ /I₂,)-4.63, and

c) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear ethylene/α

-olefin polymer having about the same I₂ and M_w /M_n, and

wherein the protective film layer (B) comprises a blend of the substantially linear ethylene/α

-olefin polymer and a polymer selected from the group consisting of low density polyethylene, high density polyethylene, ethylene vinyl acetate copolymer, polybutylene, polyvinyl alcohol, heterogeneously branched linear low density polyethylene, polyvinyl chloride, ethylene/methacrylic acid copolymer, ethylene/acrylic acid copolymer, and polypropylene.

2. A batch inclusion package comprising

(A) an ingredient to be packaged by

(B) a protective film comprising at least one layer of at least one substantially linear ethylene/α

-olefin polymer,

wherein the ingredient (A) is discreet from the protective film (B), but wherein the ingredient (A) and the protective film (B) are incorporated into a final article, and wherein the substantially linear ethylene/α

-olefin polymer is characterized as having;

a) a melt flow ratio, I₁₀ /I₂,≧

5.63,

b) a molecular weight distribution, M_w /M_n, defined by the equation;

M_w /M_n ≦

(I₁₀ /I₂)-4.63, and

c) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear ethylene/α

-olefin polymer having about the same I₂ and M_w /M_n, and

wherein the protective film layer (B) comprises a layer of the substantially linear ethylene/α

-olefin polymer and at least one layer of a polymer selected from the group consisting of low density polyethylene, high density polyethylene, ethylene vinyl acetate copolymer, polybutylene, polyvinyl alcohol, heterogeneously branched linear low density polyethylene, polyvinyl chloride, ethylene/methacrylic acid copolymer, ethylene/acrylic acid copolymer, and polypropylene.

3. A batch inclusion package comprising:

(A) an ingredient to be packaged by

(B) a protective film comprising at least one layer of at least one substantially linear ethylene/α

-olefin polymer,

wherein the ingredient (A) is discreet from the protective film (B) but wherein the ingredient (A) and the protective film (B) are incorporated into a final article and wherein the substantially linear ethylene/α

-olefin polymer is characterized as having;

a) a melt flow ratio, I₁₀ /I₂,>

5.63, and

b) a molecular weight distribution, M_w /M_n, from about 1.5 to about 2.5, and

wherein the protective film layer (B) comprises a blend of the substantially linear ethylene/α

-olefin polymer and a polymer selected from the group consisting of low density polyethylene, high density polyethylene, ethylene vinyl acetate copolymer, polybutylene, polyvinyl alcohol, heterogeneously branched linear low density polyethylene, polyvinyl chloride, ethylene/methacrylic acid copolymer, ethylene/acrylic acid copolymer, and polypropylene.