Sigma Plastics Group

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(https://alpha-industries.com) 📸 Data Snapshot: May 29, 2026

Semantic Coherence — The Lens

Pull the main entities out of the H1, then check whether they actually recur through the body. A page that announces one thing and then talks about another drifts. Headings with no real sentences underneath read as pseudo-substance.

Pillar: Semantic Coherence Analysis Diagnosis: Semantic Drift Check

Semantic Coherence Homepage promise vs. Sub-page reality.

19 Impact Weight: 20 / 100

95% Reputation

There is minimal semantic drift between the homepage promise and sub-page delivery, as the homepage positions the group as a North American leader with 40+ locations and the Locations sub-page provides the forensic proof of those entities. The hero message of being a one source for extruded polyethylene is supported by the diverse list of subsidiaries like Aargus, Allied, and IsoFlex. One minor inconsistency is the technical implementation where the homepage lacks an H1 tag, yet the Locations page uses a proper H1 The Sigma Plastics Group of Companies. The sub-pages maintain the corporate identity without the identity shifts often seen in high-BS marketing sites.

Semantic Coherence is read from the heading hierarchy first: what each page announces in its H1 and headings, then whether the body actually delivers on it. Below is the structure the engine mapped, followed by the clean text to check for drift between promise and reality.

🏗️ Semantic Structure — heading hierarchy & page identity (the promise the page makes)

HOMEPAGE Home (https://alpha-industries.com)

Title

Home

Meta

Sigma Plastics Group of Companies includes Aargus, Allied, Beta, Coastal Films, Emballage Performant, Epsilon, Filmtech, IsoFlex Packaging, McNeely, Mercury, New Excelsior, Omega, Performance Packaging, Poly Plastic, Reliance, Republic Bag, Sigma Stretch Film, Southeastern, Tara.

H1 The Sigma Plastics Group of Companies

H3 Select this location

H3 Headquarters:

📝 The Narrative — clean text per page (homepage promise vs. sub-page reality)

HOMEPAGE (https://alpha-industries.com) Home

Sigma Plastics Group is your one source for extruded polyethylene film and bags.
As North America´s largest privately held film manufacturer, Sigma Plastics Group is uniquely positioned to meet a wide range of extruded polyethylene product needs. Our quality, innovation and expertise in flexible packaging, is only surpassed by our ability to deliver film products from over 40 locations throughout the United States and Canada.

[H2] The Sigma Plastics Group of Companies   (View all locations)
Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/aargus.png]
Aargus PlasticsWheeling, ILTel: 847-325-4444Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/AlliedPlastics-1.png]
Allied Plastics HoldingsNewark, NJTel: 718-729-5500Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Beta.png]
Beta PlasticsCarlstadt, NJTel: 201-933-1400Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Coastal.png]
Coastal Films of FloridaJacksonville, FLTel: 904-786-2031Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/03/PerformEmballage.png]
Emballage PerformantCowansville, QuebecTel: 450-263-6360Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Epsilon.png]
Epsilon Plastics, Inc. CARancho Domiguez, CATel: 800-710-5080Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Epsilon.png]
Epsilon Plastics, Inc. SCSpartanburg, SCTel: 800-421-2247Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/FilmTech.png]
Filmtech Corp.Allentown, PATel: 610-709-9999Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Isoflex-1.png]
ISOFlex Packaging FLPompano Beach, FLTel: 800.325.7740Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Isoflex-1.png]
ISOFlex Packaging ILChicago, ILTel: 866.295.8290Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Isoflex-1.png]
ISOFlex Packaging INWashington, INTel: 812.610.8400Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Isoflex-1.png]
ISOFlex Packaging NCStatesville, NCTel: 877.871.8880Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Isoflex-1.png]
ISOFlex Packaging SCGray Court, SCTel: 864-724-8100Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Isoflex-1.png]
ISOFlex Packaging TNNashville, TNTel: 864.724.8400Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Isoflex-1.png]
ISOFlex Packaging WAVancouver, WATel: 864.724.8300Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Mcneely-1.png]
McNeely PlasticsClinton, MSTel: 601-926-1000Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Mercury.png]
Mercury Plastics, Inc. CACity of Industry, CATel: 626-961-0165Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Mercury.png]
Mercury Plastics, CanadaEdmonton, Alberta, CanadaTel: (780) 452-5681Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Mercury.png]
Mercury Plastics, WAVancouver, WATel: 360-693-0627Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Sigma.png]
New Excelsior Inc.Brevard, NCTel: 828-885-2929Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Omega.png]
Omega Plastics KYShelbyville, KYTel: 502-633-0168Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Omega.png]
Omega Plastics NJLyndhurst, NJTel: 201-933-5353Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Omega.png]
Omega Plastics CARancho Cucamonga, CATel: 909-941-2800Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/PPlogo-2.png]
Performance PackagingCowansville, QuebecTel: 450-263-6360Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/PolyPlastics.png]
Poly Plastic Products NCMarshville, NCTel: 704-624-2555Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/PolyPlastics.png]
Poly Plastic Products PADelano, PATel: 570-467-3000Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2018/12/Mercury.png]
Polypak Packaging, CALos Angeles, CATel: 323-264-2400 Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Sigma.png]
Reliance PackagingAberdeen, NCTel: 910-944-2561Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Republic.png]
Republic Bag Inc CACorona, CATel: 800-852-2247Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Republic.png]
Republic Bag Inc TXHouston, TXTel: 713-847-7542Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/SantaFe.png]
Santa Fe PackagingSanta Fe Springs, CATel: 800-645-0626Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Sigma.png]
Sigma Stretch Film of CaliforniaRiverside, CA Tel: 951-781-8807Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Sigma.png]
Sigma Stretch Film ofCanadaBelleville, ONTel: 613-966-4400Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Sigma.png]
Sigma Stretch Film of KentuckyShelbyville, KYTel: 502-633-0168Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Sigma.png]
Sigma Stretch Film of NJ(Corporate Headquarters)Lyndhurst, NJTel: 201-507-9100Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Sigma.png]
Sigma Stretch Film of OklahomaTulsa, OKTel: 918-447-3333Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/SouthEastern-1.png]
Southeastern Plastics CorpNew Brunswick, NJTel: 732-846-8500Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/SouthernFilm.png]
Southern Film ExtrudersHigh Point, NCTel: 800-334-6101Select this location
[IMG: https://www.sigmaplasticsgroup.com/wp-content/uploads/2019/01/Tara-1.png]
Tara PlasticsForest Park, GATel: (404) 366-4464

[H2] Sigma Plastics Product Offerings

[H3] Custom Films
With key products in customizable sizes, gauges and colors, Sigma stands apart from the competition.
Read More >

[H3] Stretch Films
Sigma is able to dramatically increase efficient fulfillment of stretch film orders and production capabilities.
Read More >

[H3] Institutional Products
From food service to healthcare, the Sigma institutional products range a wide variety of industries.
Read More >

[H2] EXCELLENCE IN SERVICE, RELIABILITY AND QUALITY

0Over 2.0 Billion lbs. Annual Raw Materials0Million lbs. silo storage capacity0Over 40 Locations

7306 chars

SUB-PAGE (https://alpha-industries.com/sigmaPlastics2/locations/) Locations

Tel: 954-429-6100

[H1] The Sigma Plastics Group of Companies

Aargus PlasticsWheeling, ILTel: 847-325-4444

[H3] Select this location

Allied Plastics HoldingsNewark, NJTel: 718-729-5500

[H3] Select this location

Beta PlasticsCarlstadt, NJTel: 201-933-1400

[H3] Select this location

Coastal Films of FloridaJacksonville, FLTel: 904-786-2031

[H3] Select this location

Emballage PerformantCowansville, QuebecTel: 450-263-6360

[H3] Select this location

Epsilon Plastics, Inc. CARancho Domiguez, CATel: 800-710-5080

[H3] Select this location

Epsilon Plastics, Inc. SCSpartanburg, SCTel: 800-421-2247

[H3] Select this location

Filmtech Corp.Allentown, PATel: 610-709-9999

[H3] Select this location

ISOFlex Packaging FLPompano Beach, FLTel: 800.325.7740

[H3] Select this location

ISOFlex Packaging ILChicago, ILTel: 866.295.8290

[H3] Select this location

ISOFlex Packaging INWashington, INTel: 812.610.8400

[H3] Select this location

ISOFlex Packaging NCStatesville, NCTel: 877.871.8880

[H3] Select this location

ISOFlex Packaging SCGray Court, SCTel: 864-724-8100

[H3] Select this location

ISOFlex Packaging TNNashville, TNTel: 864.724.8400

[H3] Select this location

ISOFlex Packaging WAVancouver, WATel: 864.724.8300

[H3] Select this location

McNeely PlasticsClinton, MSTel: 601-926-1000

[H3] Select this location

Mercury Plastics, Inc. CACity of Industry, CATel: 626-961-0165

[H3] Select this location

Mercury Plastics, CanadaEdmonton, Alberta, CanadaTel: (780) 452-5681

[H3] Select this location

Mercury Plastics, WAVancouver, WATel: 360-693-0627

[H3] Select this location

New Excelsior Inc.Brevard, NCTel: 828-885-2929

[H3] Select this location

Omega Plastics KYShelbyville, KYTel: 502-633-0168

[H3] Select this location

Omega Plastics NJLyndhurst, NJTel: 201-933-5353

[H3] Select this location

Omega Plastics CARancho Cucamonga, CATel: 909-941-2800

[H3] Select this location

Performance PackagingCowansville, QuebecTel: 450-263-6360

[H3] Select this location

Poly Plastic Products NCMarshville, NCTel: 704-624-2555

[H3] Select this location

Poly Plastic Products PADelano, PATel: 570-467-3000

[H3] Select this location

Polypak Packaging, CALos Angeles, CATel: 323-264-2400

[H3] Select this location

Reliance PackagingAberdeen, NCTel: 910-944-2561

[H3] Select this location

Republic Bag Inc CACorona, CATel: 800-852-2247

[H3] Select this location

Republic Bag Inc TXHouston, TXTel: 713-847-7542

[H3] Select this location

Santa Fe PackagingSanta Fe Springs, CATel: 800-645-0626

[H3] Select this location

Sigma Stretch Film of CaliforniaRiverside, CA Tel: 951-781-8807

[H3] Select this location

Sigma Stretch Film ofCanadaBelleville, ONTel: 613-966-4400

[H3] Select this location

Sigma Stretch Film of KentuckyShelbyville, KYTel: 502-633-0168

[H3] Select this location

Sigma Stretch Film of NJ(Corporate Headquarters)Lyndhurst, NJTel: 201-507-9100

[H3] Select this location

Sigma Stretch Film of OklahomaTulsa, OKTel: 918-447-3333

[H3] Select this location

Southeastern Plastics CorpNew Brunswick, NJTel: 732-846-8500

[H3] Select this location

Southern Film ExtrudersHigh Point, NCTel: 800-334-6101

[H3] Select this location

Tara PlasticsForest Park, GATel: (404) 366-4464

[H3] Select this location

3629 chars

Explore the other reputation pillars for Sigma Plastics Group

Information Density → Trust & Proof → Commodity Fingerprint → Identity & Authority →

Analysis Disclosure & Source Attribution

This page presents a snapshot of public data from Sigma Plastics Group, captured on May 29, 2026, to show how machine logic reads Semantic Coherence signals into an AI reputation evaluation.

Purpose: This data is presented under “Fair Use” for the purpose of independent signal analysis, allowing readers to see the raw signals behind the reputation score.

Notice to Sigma Plastics Group: This analysis is part of a non-adversarial audit conducted by 1 Euro SEO. The results are intended as professional feedback to help improve any website’s machine-readability and authority signals. The evaluation is free, and any company can request a fresh audit at any time.

Any company can use the insights for free and improve its voice. When a company has updated its content, it can always submit a new audit request, which will be reflected in a new current score.

To all users: You are encouraged to visit the live site at https://alpha-industries.com to view the most current version of its content and see directly what this company is about and what it offers.

Semantic Coherence: Sigma Plastics Group – Signal Evidence & AI Readability

Sigma Plastics Group